annotate src/os/linux/vm/os_linux.cpp @ 2191:d70fe6ab4436

6588413: Use -fvisibility=hidden for gcc compiles Summary: Add option for gcc 4 and above, define JNIEXPORT and JNIIMPORT to visibility=default, add for jio_snprintf and others since -fvisibility=hidden overrides --version-script definitions. Reviewed-by: kamg, never
author coleenp
date Tue, 01 Feb 2011 11:23:19 -0500
parents 34d64ad817f4
children 9cd8a2c2d584
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1 /*
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2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 # define __STDC_FORMAT_MACROS
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26
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27 // no precompiled headers
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28 #include "classfile/classLoader.hpp"
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29 #include "classfile/systemDictionary.hpp"
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30 #include "classfile/vmSymbols.hpp"
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31 #include "code/icBuffer.hpp"
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32 #include "code/vtableStubs.hpp"
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33 #include "compiler/compileBroker.hpp"
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34 #include "interpreter/interpreter.hpp"
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35 #include "jvm_linux.h"
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36 #include "memory/allocation.inline.hpp"
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37 #include "memory/filemap.hpp"
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38 #include "mutex_linux.inline.hpp"
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39 #include "oops/oop.inline.hpp"
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40 #include "os_share_linux.hpp"
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41 #include "prims/jniFastGetField.hpp"
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42 #include "prims/jvm.h"
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43 #include "prims/jvm_misc.hpp"
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44 #include "runtime/arguments.hpp"
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45 #include "runtime/extendedPC.hpp"
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46 #include "runtime/globals.hpp"
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47 #include "runtime/interfaceSupport.hpp"
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48 #include "runtime/java.hpp"
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49 #include "runtime/javaCalls.hpp"
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50 #include "runtime/mutexLocker.hpp"
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51 #include "runtime/objectMonitor.hpp"
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52 #include "runtime/osThread.hpp"
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53 #include "runtime/perfMemory.hpp"
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54 #include "runtime/sharedRuntime.hpp"
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55 #include "runtime/statSampler.hpp"
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56 #include "runtime/stubRoutines.hpp"
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57 #include "runtime/threadCritical.hpp"
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58 #include "runtime/timer.hpp"
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59 #include "services/attachListener.hpp"
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60 #include "services/runtimeService.hpp"
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61 #include "thread_linux.inline.hpp"
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62 #include "utilities/decoder.hpp"
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63 #include "utilities/defaultStream.hpp"
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64 #include "utilities/events.hpp"
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65 #include "utilities/growableArray.hpp"
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66 #include "utilities/vmError.hpp"
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67 #ifdef TARGET_ARCH_x86
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68 # include "assembler_x86.inline.hpp"
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69 # include "nativeInst_x86.hpp"
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70 #endif
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71 #ifdef TARGET_ARCH_sparc
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72 # include "assembler_sparc.inline.hpp"
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73 # include "nativeInst_sparc.hpp"
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74 #endif
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75 #ifdef TARGET_ARCH_zero
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76 # include "assembler_zero.inline.hpp"
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77 # include "nativeInst_zero.hpp"
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78 #endif
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79 #ifdef COMPILER1
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80 #include "c1/c1_Runtime1.hpp"
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81 #endif
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82 #ifdef COMPILER2
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83 #include "opto/runtime.hpp"
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84 #endif
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85
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86 // put OS-includes here
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87 # include <sys/types.h>
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88 # include <sys/mman.h>
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89 # include <sys/stat.h>
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90 # include <sys/select.h>
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91 # include <pthread.h>
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92 # include <signal.h>
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93 # include <errno.h>
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94 # include <dlfcn.h>
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95 # include <stdio.h>
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96 # include <unistd.h>
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97 # include <sys/resource.h>
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98 # include <pthread.h>
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99 # include <sys/stat.h>
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100 # include <sys/time.h>
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101 # include <sys/times.h>
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102 # include <sys/utsname.h>
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103 # include <sys/socket.h>
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104 # include <sys/wait.h>
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105 # include <pwd.h>
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106 # include <poll.h>
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107 # include <semaphore.h>
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108 # include <fcntl.h>
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109 # include <string.h>
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110 # include <syscall.h>
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111 # include <sys/sysinfo.h>
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112 # include <gnu/libc-version.h>
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113 # include <sys/ipc.h>
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114 # include <sys/shm.h>
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115 # include <link.h>
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116 # include <stdint.h>
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117 # include <inttypes.h>
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118 # include <sys/ioctl.h>
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119
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120 #define MAX_PATH (2 * K)
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121
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122 // for timer info max values which include all bits
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123 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
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124 #define SEC_IN_NANOSECS 1000000000LL
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125
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126 ////////////////////////////////////////////////////////////////////////////////
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127 // global variables
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128 julong os::Linux::_physical_memory = 0;
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129
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130 address os::Linux::_initial_thread_stack_bottom = NULL;
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131 uintptr_t os::Linux::_initial_thread_stack_size = 0;
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132
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133 int (*os::Linux::_clock_gettime)(clockid_t, struct timespec *) = NULL;
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134 int (*os::Linux::_pthread_getcpuclockid)(pthread_t, clockid_t *) = NULL;
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135 Mutex* os::Linux::_createThread_lock = NULL;
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136 pthread_t os::Linux::_main_thread;
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137 int os::Linux::_page_size = -1;
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138 bool os::Linux::_is_floating_stack = false;
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139 bool os::Linux::_is_NPTL = false;
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140 bool os::Linux::_supports_fast_thread_cpu_time = false;
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141 const char * os::Linux::_glibc_version = NULL;
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142 const char * os::Linux::_libpthread_version = NULL;
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143
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144 static jlong initial_time_count=0;
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145
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146 static int clock_tics_per_sec = 100;
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147
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148 // For diagnostics to print a message once. see run_periodic_checks
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149 static sigset_t check_signal_done;
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150 static bool check_signals = true;;
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151
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152 static pid_t _initial_pid = 0;
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153
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154 /* Signal number used to suspend/resume a thread */
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155
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156 /* do not use any signal number less than SIGSEGV, see 4355769 */
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157 static int SR_signum = SIGUSR2;
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158 sigset_t SR_sigset;
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159
242
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160 /* Used to protect dlsym() calls */
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161 static pthread_mutex_t dl_mutex;
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162
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163 ////////////////////////////////////////////////////////////////////////////////
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164 // utility functions
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165
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166 static int SR_initialize();
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167 static int SR_finalize();
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168
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169 julong os::available_memory() {
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170 return Linux::available_memory();
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171 }
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172
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173 julong os::Linux::available_memory() {
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174 // values in struct sysinfo are "unsigned long"
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175 struct sysinfo si;
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176 sysinfo(&si);
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177
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178 return (julong)si.freeram * si.mem_unit;
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179 }
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180
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181 julong os::physical_memory() {
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182 return Linux::physical_memory();
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183 }
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184
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185 julong os::allocatable_physical_memory(julong size) {
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186 #ifdef _LP64
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187 return size;
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188 #else
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189 julong result = MIN2(size, (julong)3800*M);
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190 if (!is_allocatable(result)) {
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191 // See comments under solaris for alignment considerations
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192 julong reasonable_size = (julong)2*G - 2 * os::vm_page_size();
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193 result = MIN2(size, reasonable_size);
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194 }
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195 return result;
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196 #endif // _LP64
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197 }
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198
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199 ////////////////////////////////////////////////////////////////////////////////
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200 // environment support
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201
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202 bool os::getenv(const char* name, char* buf, int len) {
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203 const char* val = ::getenv(name);
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204 if (val != NULL && strlen(val) < (size_t)len) {
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205 strcpy(buf, val);
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206 return true;
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207 }
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208 if (len > 0) buf[0] = 0; // return a null string
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209 return false;
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210 }
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211
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212
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213 // Return true if user is running as root.
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214
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215 bool os::have_special_privileges() {
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216 static bool init = false;
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217 static bool privileges = false;
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218 if (!init) {
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219 privileges = (getuid() != geteuid()) || (getgid() != getegid());
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220 init = true;
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221 }
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222 return privileges;
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223 }
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224
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225
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226 #ifndef SYS_gettid
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227 // i386: 224, ia64: 1105, amd64: 186, sparc 143
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228 #ifdef __ia64__
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229 #define SYS_gettid 1105
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230 #elif __i386__
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231 #define SYS_gettid 224
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232 #elif __amd64__
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233 #define SYS_gettid 186
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234 #elif __sparc__
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235 #define SYS_gettid 143
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236 #else
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237 #error define gettid for the arch
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238 #endif
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239 #endif
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240
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241 // Cpu architecture string
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242 #if defined(ZERO)
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243 static char cpu_arch[] = ZERO_LIBARCH;
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244 #elif defined(IA64)
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245 static char cpu_arch[] = "ia64";
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246 #elif defined(IA32)
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247 static char cpu_arch[] = "i386";
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248 #elif defined(AMD64)
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249 static char cpu_arch[] = "amd64";
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250 #elif defined(ARM)
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251 static char cpu_arch[] = "arm";
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252 #elif defined(PPC)
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253 static char cpu_arch[] = "ppc";
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254 #elif defined(SPARC)
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255 # ifdef _LP64
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256 static char cpu_arch[] = "sparcv9";
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257 # else
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258 static char cpu_arch[] = "sparc";
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259 # endif
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260 #else
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261 #error Add appropriate cpu_arch setting
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262 #endif
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263
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264
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265 // pid_t gettid()
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266 //
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267 // Returns the kernel thread id of the currently running thread. Kernel
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268 // thread id is used to access /proc.
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269 //
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270 // (Note that getpid() on LinuxThreads returns kernel thread id too; but
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271 // on NPTL, it returns the same pid for all threads, as required by POSIX.)
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272 //
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273 pid_t os::Linux::gettid() {
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274 int rslt = syscall(SYS_gettid);
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275 if (rslt == -1) {
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276 // old kernel, no NPTL support
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277 return getpid();
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278 } else {
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279 return (pid_t)rslt;
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280 }
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281 }
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282
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283 // Most versions of linux have a bug where the number of processors are
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284 // determined by looking at the /proc file system. In a chroot environment,
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285 // the system call returns 1. This causes the VM to act as if it is
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286 // a single processor and elide locking (see is_MP() call).
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287 static bool unsafe_chroot_detected = false;
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288 static const char *unstable_chroot_error = "/proc file system not found.\n"
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289 "Java may be unstable running multithreaded in a chroot "
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290 "environment on Linux when /proc filesystem is not mounted.";
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291
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292 void os::Linux::initialize_system_info() {
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293 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
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294 if (processor_count() == 1) {
0
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295 pid_t pid = os::Linux::gettid();
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296 char fname[32];
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297 jio_snprintf(fname, sizeof(fname), "/proc/%d", pid);
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298 FILE *fp = fopen(fname, "r");
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299 if (fp == NULL) {
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300 unsafe_chroot_detected = true;
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301 } else {
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302 fclose(fp);
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303 }
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304 }
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305 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE);
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306 assert(processor_count() > 0, "linux error");
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307 }
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308
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309 void os::init_system_properties_values() {
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310 // char arch[12];
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311 // sysinfo(SI_ARCHITECTURE, arch, sizeof(arch));
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312
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313 // The next steps are taken in the product version:
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314 //
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315 // Obtain the JAVA_HOME value from the location of libjvm[_g].so.
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316 // This library should be located at:
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317 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so.
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318 //
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319 // If "/jre/lib/" appears at the right place in the path, then we
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320 // assume libjvm[_g].so is installed in a JDK and we use this path.
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321 //
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322 // Otherwise exit with message: "Could not create the Java virtual machine."
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323 //
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324 // The following extra steps are taken in the debugging version:
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325 //
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326 // If "/jre/lib/" does NOT appear at the right place in the path
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327 // instead of exit check for $JAVA_HOME environment variable.
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328 //
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329 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
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330 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so
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331 // it looks like libjvm[_g].so is installed there
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332 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so.
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333 //
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334 // Otherwise exit.
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335 //
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336 // Important note: if the location of libjvm.so changes this
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337 // code needs to be changed accordingly.
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338
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339 // The next few definitions allow the code to be verbatim:
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340 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n))
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341 #define getenv(n) ::getenv(n)
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342
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343 /*
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344 * See ld(1):
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345 * The linker uses the following search paths to locate required
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346 * shared libraries:
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347 * 1: ...
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348 * ...
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349 * 7: The default directories, normally /lib and /usr/lib.
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350 */
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351 #if defined(AMD64) || defined(_LP64) && (defined(SPARC) || defined(PPC) || defined(S390))
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352 #define DEFAULT_LIBPATH "/usr/lib64:/lib64:/lib:/usr/lib"
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353 #else
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354 #define DEFAULT_LIBPATH "/lib:/usr/lib"
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355 #endif
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356
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357 #define EXTENSIONS_DIR "/lib/ext"
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358 #define ENDORSED_DIR "/lib/endorsed"
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359 #define REG_DIR "/usr/java/packages"
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360
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361 {
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362 /* sysclasspath, java_home, dll_dir */
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363 {
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364 char *home_path;
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365 char *dll_path;
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366 char *pslash;
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367 char buf[MAXPATHLEN];
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368 os::jvm_path(buf, sizeof(buf));
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369
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370 // Found the full path to libjvm.so.
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371 // Now cut the path to <java_home>/jre if we can.
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372 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */
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373 pslash = strrchr(buf, '/');
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374 if (pslash != NULL)
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375 *pslash = '\0'; /* get rid of /{client|server|hotspot} */
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376 dll_path = malloc(strlen(buf) + 1);
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377 if (dll_path == NULL)
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378 return;
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379 strcpy(dll_path, buf);
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380 Arguments::set_dll_dir(dll_path);
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381
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382 if (pslash != NULL) {
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383 pslash = strrchr(buf, '/');
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384 if (pslash != NULL) {
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385 *pslash = '\0'; /* get rid of /<arch> */
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386 pslash = strrchr(buf, '/');
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387 if (pslash != NULL)
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388 *pslash = '\0'; /* get rid of /lib */
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389 }
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390 }
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391
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392 home_path = malloc(strlen(buf) + 1);
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393 if (home_path == NULL)
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394 return;
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395 strcpy(home_path, buf);
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396 Arguments::set_java_home(home_path);
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397
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398 if (!set_boot_path('/', ':'))
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399 return;
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400 }
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401
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402 /*
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403 * Where to look for native libraries
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404 *
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405 * Note: Due to a legacy implementation, most of the library path
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406 * is set in the launcher. This was to accomodate linking restrictions
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parents:
diff changeset
407 * on legacy Linux implementations (which are no longer supported).
a61af66fc99e Initial load
duke
parents:
diff changeset
408 * Eventually, all the library path setting will be done here.
a61af66fc99e Initial load
duke
parents:
diff changeset
409 *
a61af66fc99e Initial load
duke
parents:
diff changeset
410 * However, to prevent the proliferation of improperly built native
a61af66fc99e Initial load
duke
parents:
diff changeset
411 * libraries, the new path component /usr/java/packages is added here.
a61af66fc99e Initial load
duke
parents:
diff changeset
412 * Eventually, all the library path setting will be done here.
a61af66fc99e Initial load
duke
parents:
diff changeset
413 */
a61af66fc99e Initial load
duke
parents:
diff changeset
414 {
a61af66fc99e Initial load
duke
parents:
diff changeset
415 char *ld_library_path;
a61af66fc99e Initial load
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parents:
diff changeset
416
a61af66fc99e Initial load
duke
parents:
diff changeset
417 /*
a61af66fc99e Initial load
duke
parents:
diff changeset
418 * Construct the invariant part of ld_library_path. Note that the
a61af66fc99e Initial load
duke
parents:
diff changeset
419 * space for the colon and the trailing null are provided by the
a61af66fc99e Initial load
duke
parents:
diff changeset
420 * nulls included by the sizeof operator (so actually we allocate
a61af66fc99e Initial load
duke
parents:
diff changeset
421 * a byte more than necessary).
a61af66fc99e Initial load
duke
parents:
diff changeset
422 */
a61af66fc99e Initial load
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parents:
diff changeset
423 ld_library_path = (char *) malloc(sizeof(REG_DIR) + sizeof("/lib/") +
a61af66fc99e Initial load
duke
parents:
diff changeset
424 strlen(cpu_arch) + sizeof(DEFAULT_LIBPATH));
a61af66fc99e Initial load
duke
parents:
diff changeset
425 sprintf(ld_library_path, REG_DIR "/lib/%s:" DEFAULT_LIBPATH, cpu_arch);
a61af66fc99e Initial load
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parents:
diff changeset
426
a61af66fc99e Initial load
duke
parents:
diff changeset
427 /*
a61af66fc99e Initial load
duke
parents:
diff changeset
428 * Get the user setting of LD_LIBRARY_PATH, and prepended it. It
a61af66fc99e Initial load
duke
parents:
diff changeset
429 * should always exist (until the legacy problem cited above is
a61af66fc99e Initial load
duke
parents:
diff changeset
430 * addressed).
a61af66fc99e Initial load
duke
parents:
diff changeset
431 */
a61af66fc99e Initial load
duke
parents:
diff changeset
432 char *v = getenv("LD_LIBRARY_PATH");
a61af66fc99e Initial load
duke
parents:
diff changeset
433 if (v != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
434 char *t = ld_library_path;
a61af66fc99e Initial load
duke
parents:
diff changeset
435 /* That's +1 for the colon and +1 for the trailing '\0' */
a61af66fc99e Initial load
duke
parents:
diff changeset
436 ld_library_path = (char *) malloc(strlen(v) + 1 + strlen(t) + 1);
a61af66fc99e Initial load
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parents:
diff changeset
437 sprintf(ld_library_path, "%s:%s", v, t);
a61af66fc99e Initial load
duke
parents:
diff changeset
438 }
a61af66fc99e Initial load
duke
parents:
diff changeset
439 Arguments::set_library_path(ld_library_path);
a61af66fc99e Initial load
duke
parents:
diff changeset
440 }
a61af66fc99e Initial load
duke
parents:
diff changeset
441
a61af66fc99e Initial load
duke
parents:
diff changeset
442 /*
a61af66fc99e Initial load
duke
parents:
diff changeset
443 * Extensions directories.
a61af66fc99e Initial load
duke
parents:
diff changeset
444 *
a61af66fc99e Initial load
duke
parents:
diff changeset
445 * Note that the space for the colon and the trailing null are provided
a61af66fc99e Initial load
duke
parents:
diff changeset
446 * by the nulls included by the sizeof operator (so actually one byte more
a61af66fc99e Initial load
duke
parents:
diff changeset
447 * than necessary is allocated).
a61af66fc99e Initial load
duke
parents:
diff changeset
448 */
a61af66fc99e Initial load
duke
parents:
diff changeset
449 {
a61af66fc99e Initial load
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parents:
diff changeset
450 char *buf = malloc(strlen(Arguments::get_java_home()) +
a61af66fc99e Initial load
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parents:
diff changeset
451 sizeof(EXTENSIONS_DIR) + sizeof(REG_DIR) + sizeof(EXTENSIONS_DIR));
a61af66fc99e Initial load
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parents:
diff changeset
452 sprintf(buf, "%s" EXTENSIONS_DIR ":" REG_DIR EXTENSIONS_DIR,
a61af66fc99e Initial load
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parents:
diff changeset
453 Arguments::get_java_home());
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duke
parents:
diff changeset
454 Arguments::set_ext_dirs(buf);
a61af66fc99e Initial load
duke
parents:
diff changeset
455 }
a61af66fc99e Initial load
duke
parents:
diff changeset
456
a61af66fc99e Initial load
duke
parents:
diff changeset
457 /* Endorsed standards default directory. */
a61af66fc99e Initial load
duke
parents:
diff changeset
458 {
a61af66fc99e Initial load
duke
parents:
diff changeset
459 char * buf;
a61af66fc99e Initial load
duke
parents:
diff changeset
460 buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR));
a61af66fc99e Initial load
duke
parents:
diff changeset
461 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home());
a61af66fc99e Initial load
duke
parents:
diff changeset
462 Arguments::set_endorsed_dirs(buf);
a61af66fc99e Initial load
duke
parents:
diff changeset
463 }
a61af66fc99e Initial load
duke
parents:
diff changeset
464 }
a61af66fc99e Initial load
duke
parents:
diff changeset
465
a61af66fc99e Initial load
duke
parents:
diff changeset
466 #undef malloc
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duke
parents:
diff changeset
467 #undef getenv
a61af66fc99e Initial load
duke
parents:
diff changeset
468 #undef EXTENSIONS_DIR
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duke
parents:
diff changeset
469 #undef ENDORSED_DIR
a61af66fc99e Initial load
duke
parents:
diff changeset
470
a61af66fc99e Initial load
duke
parents:
diff changeset
471 // Done
a61af66fc99e Initial load
duke
parents:
diff changeset
472 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
473 }
a61af66fc99e Initial load
duke
parents:
diff changeset
474
a61af66fc99e Initial load
duke
parents:
diff changeset
475 ////////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
476 // breakpoint support
a61af66fc99e Initial load
duke
parents:
diff changeset
477
a61af66fc99e Initial load
duke
parents:
diff changeset
478 void os::breakpoint() {
a61af66fc99e Initial load
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parents:
diff changeset
479 BREAKPOINT;
a61af66fc99e Initial load
duke
parents:
diff changeset
480 }
a61af66fc99e Initial load
duke
parents:
diff changeset
481
a61af66fc99e Initial load
duke
parents:
diff changeset
482 extern "C" void breakpoint() {
a61af66fc99e Initial load
duke
parents:
diff changeset
483 // use debugger to set breakpoint here
a61af66fc99e Initial load
duke
parents:
diff changeset
484 }
a61af66fc99e Initial load
duke
parents:
diff changeset
485
a61af66fc99e Initial load
duke
parents:
diff changeset
486 ////////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
487 // signal support
a61af66fc99e Initial load
duke
parents:
diff changeset
488
a61af66fc99e Initial load
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parents:
diff changeset
489 debug_only(static bool signal_sets_initialized = false);
a61af66fc99e Initial load
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parents:
diff changeset
490 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
a61af66fc99e Initial load
duke
parents:
diff changeset
491
a61af66fc99e Initial load
duke
parents:
diff changeset
492 bool os::Linux::is_sig_ignored(int sig) {
a61af66fc99e Initial load
duke
parents:
diff changeset
493 struct sigaction oact;
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duke
parents:
diff changeset
494 sigaction(sig, (struct sigaction*)NULL, &oact);
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duke
parents:
diff changeset
495 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
a61af66fc99e Initial load
duke
parents:
diff changeset
496 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
a61af66fc99e Initial load
duke
parents:
diff changeset
497 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN))
a61af66fc99e Initial load
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parents:
diff changeset
498 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
499 else
a61af66fc99e Initial load
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parents:
diff changeset
500 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
501 }
a61af66fc99e Initial load
duke
parents:
diff changeset
502
a61af66fc99e Initial load
duke
parents:
diff changeset
503 void os::Linux::signal_sets_init() {
a61af66fc99e Initial load
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parents:
diff changeset
504 // Should also have an assertion stating we are still single-threaded.
a61af66fc99e Initial load
duke
parents:
diff changeset
505 assert(!signal_sets_initialized, "Already initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
506 // Fill in signals that are necessarily unblocked for all threads in
a61af66fc99e Initial load
duke
parents:
diff changeset
507 // the VM. Currently, we unblock the following signals:
a61af66fc99e Initial load
duke
parents:
diff changeset
508 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
a61af66fc99e Initial load
duke
parents:
diff changeset
509 // by -Xrs (=ReduceSignalUsage));
a61af66fc99e Initial load
duke
parents:
diff changeset
510 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
a61af66fc99e Initial load
duke
parents:
diff changeset
511 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
a61af66fc99e Initial load
duke
parents:
diff changeset
512 // the dispositions or masks wrt these signals.
a61af66fc99e Initial load
duke
parents:
diff changeset
513 // Programs embedding the VM that want to use the above signals for their
a61af66fc99e Initial load
duke
parents:
diff changeset
514 // own purposes must, at this time, use the "-Xrs" option to prevent
a61af66fc99e Initial load
duke
parents:
diff changeset
515 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
a61af66fc99e Initial load
duke
parents:
diff changeset
516 // (See bug 4345157, and other related bugs).
a61af66fc99e Initial load
duke
parents:
diff changeset
517 // In reality, though, unblocking these signals is really a nop, since
a61af66fc99e Initial load
duke
parents:
diff changeset
518 // these signals are not blocked by default.
a61af66fc99e Initial load
duke
parents:
diff changeset
519 sigemptyset(&unblocked_sigs);
a61af66fc99e Initial load
duke
parents:
diff changeset
520 sigemptyset(&allowdebug_blocked_sigs);
a61af66fc99e Initial load
duke
parents:
diff changeset
521 sigaddset(&unblocked_sigs, SIGILL);
a61af66fc99e Initial load
duke
parents:
diff changeset
522 sigaddset(&unblocked_sigs, SIGSEGV);
a61af66fc99e Initial load
duke
parents:
diff changeset
523 sigaddset(&unblocked_sigs, SIGBUS);
a61af66fc99e Initial load
duke
parents:
diff changeset
524 sigaddset(&unblocked_sigs, SIGFPE);
a61af66fc99e Initial load
duke
parents:
diff changeset
525 sigaddset(&unblocked_sigs, SR_signum);
a61af66fc99e Initial load
duke
parents:
diff changeset
526
a61af66fc99e Initial load
duke
parents:
diff changeset
527 if (!ReduceSignalUsage) {
a61af66fc99e Initial load
duke
parents:
diff changeset
528 if (!os::Linux::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
529 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
a61af66fc99e Initial load
duke
parents:
diff changeset
530 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
a61af66fc99e Initial load
duke
parents:
diff changeset
531 }
a61af66fc99e Initial load
duke
parents:
diff changeset
532 if (!os::Linux::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
533 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
a61af66fc99e Initial load
duke
parents:
diff changeset
534 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
a61af66fc99e Initial load
duke
parents:
diff changeset
535 }
a61af66fc99e Initial load
duke
parents:
diff changeset
536 if (!os::Linux::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
537 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
a61af66fc99e Initial load
duke
parents:
diff changeset
538 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
a61af66fc99e Initial load
duke
parents:
diff changeset
539 }
a61af66fc99e Initial load
duke
parents:
diff changeset
540 }
a61af66fc99e Initial load
duke
parents:
diff changeset
541 // Fill in signals that are blocked by all but the VM thread.
a61af66fc99e Initial load
duke
parents:
diff changeset
542 sigemptyset(&vm_sigs);
a61af66fc99e Initial load
duke
parents:
diff changeset
543 if (!ReduceSignalUsage)
a61af66fc99e Initial load
duke
parents:
diff changeset
544 sigaddset(&vm_sigs, BREAK_SIGNAL);
a61af66fc99e Initial load
duke
parents:
diff changeset
545 debug_only(signal_sets_initialized = true);
a61af66fc99e Initial load
duke
parents:
diff changeset
546
a61af66fc99e Initial load
duke
parents:
diff changeset
547 }
a61af66fc99e Initial load
duke
parents:
diff changeset
548
a61af66fc99e Initial load
duke
parents:
diff changeset
549 // These are signals that are unblocked while a thread is running Java.
a61af66fc99e Initial load
duke
parents:
diff changeset
550 // (For some reason, they get blocked by default.)
a61af66fc99e Initial load
duke
parents:
diff changeset
551 sigset_t* os::Linux::unblocked_signals() {
a61af66fc99e Initial load
duke
parents:
diff changeset
552 assert(signal_sets_initialized, "Not initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
553 return &unblocked_sigs;
a61af66fc99e Initial load
duke
parents:
diff changeset
554 }
a61af66fc99e Initial load
duke
parents:
diff changeset
555
a61af66fc99e Initial load
duke
parents:
diff changeset
556 // These are the signals that are blocked while a (non-VM) thread is
a61af66fc99e Initial load
duke
parents:
diff changeset
557 // running Java. Only the VM thread handles these signals.
a61af66fc99e Initial load
duke
parents:
diff changeset
558 sigset_t* os::Linux::vm_signals() {
a61af66fc99e Initial load
duke
parents:
diff changeset
559 assert(signal_sets_initialized, "Not initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
560 return &vm_sigs;
a61af66fc99e Initial load
duke
parents:
diff changeset
561 }
a61af66fc99e Initial load
duke
parents:
diff changeset
562
a61af66fc99e Initial load
duke
parents:
diff changeset
563 // These are signals that are blocked during cond_wait to allow debugger in
a61af66fc99e Initial load
duke
parents:
diff changeset
564 sigset_t* os::Linux::allowdebug_blocked_signals() {
a61af66fc99e Initial load
duke
parents:
diff changeset
565 assert(signal_sets_initialized, "Not initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
566 return &allowdebug_blocked_sigs;
a61af66fc99e Initial load
duke
parents:
diff changeset
567 }
a61af66fc99e Initial load
duke
parents:
diff changeset
568
a61af66fc99e Initial load
duke
parents:
diff changeset
569 void os::Linux::hotspot_sigmask(Thread* thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
570
a61af66fc99e Initial load
duke
parents:
diff changeset
571 //Save caller's signal mask before setting VM signal mask
a61af66fc99e Initial load
duke
parents:
diff changeset
572 sigset_t caller_sigmask;
a61af66fc99e Initial load
duke
parents:
diff changeset
573 pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask);
a61af66fc99e Initial load
duke
parents:
diff changeset
574
a61af66fc99e Initial load
duke
parents:
diff changeset
575 OSThread* osthread = thread->osthread();
a61af66fc99e Initial load
duke
parents:
diff changeset
576 osthread->set_caller_sigmask(caller_sigmask);
a61af66fc99e Initial load
duke
parents:
diff changeset
577
a61af66fc99e Initial load
duke
parents:
diff changeset
578 pthread_sigmask(SIG_UNBLOCK, os::Linux::unblocked_signals(), NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
579
a61af66fc99e Initial load
duke
parents:
diff changeset
580 if (!ReduceSignalUsage) {
a61af66fc99e Initial load
duke
parents:
diff changeset
581 if (thread->is_VM_thread()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
582 // Only the VM thread handles BREAK_SIGNAL ...
a61af66fc99e Initial load
duke
parents:
diff changeset
583 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
584 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
585 // ... all other threads block BREAK_SIGNAL
a61af66fc99e Initial load
duke
parents:
diff changeset
586 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
587 }
a61af66fc99e Initial load
duke
parents:
diff changeset
588 }
a61af66fc99e Initial load
duke
parents:
diff changeset
589 }
a61af66fc99e Initial load
duke
parents:
diff changeset
590
a61af66fc99e Initial load
duke
parents:
diff changeset
591 //////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
592 // detecting pthread library
a61af66fc99e Initial load
duke
parents:
diff changeset
593
a61af66fc99e Initial load
duke
parents:
diff changeset
594 void os::Linux::libpthread_init() {
a61af66fc99e Initial load
duke
parents:
diff changeset
595 // Save glibc and pthread version strings. Note that _CS_GNU_LIBC_VERSION
a61af66fc99e Initial load
duke
parents:
diff changeset
596 // and _CS_GNU_LIBPTHREAD_VERSION are supported in glibc >= 2.3.2. Use a
a61af66fc99e Initial load
duke
parents:
diff changeset
597 // generic name for earlier versions.
a61af66fc99e Initial load
duke
parents:
diff changeset
598 // Define macros here so we can build HotSpot on old systems.
a61af66fc99e Initial load
duke
parents:
diff changeset
599 # ifndef _CS_GNU_LIBC_VERSION
a61af66fc99e Initial load
duke
parents:
diff changeset
600 # define _CS_GNU_LIBC_VERSION 2
a61af66fc99e Initial load
duke
parents:
diff changeset
601 # endif
a61af66fc99e Initial load
duke
parents:
diff changeset
602 # ifndef _CS_GNU_LIBPTHREAD_VERSION
a61af66fc99e Initial load
duke
parents:
diff changeset
603 # define _CS_GNU_LIBPTHREAD_VERSION 3
a61af66fc99e Initial load
duke
parents:
diff changeset
604 # endif
a61af66fc99e Initial load
duke
parents:
diff changeset
605
a61af66fc99e Initial load
duke
parents:
diff changeset
606 size_t n = confstr(_CS_GNU_LIBC_VERSION, NULL, 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
607 if (n > 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
608 char *str = (char *)malloc(n);
a61af66fc99e Initial load
duke
parents:
diff changeset
609 confstr(_CS_GNU_LIBC_VERSION, str, n);
a61af66fc99e Initial load
duke
parents:
diff changeset
610 os::Linux::set_glibc_version(str);
a61af66fc99e Initial load
duke
parents:
diff changeset
611 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
612 // _CS_GNU_LIBC_VERSION is not supported, try gnu_get_libc_version()
a61af66fc99e Initial load
duke
parents:
diff changeset
613 static char _gnu_libc_version[32];
a61af66fc99e Initial load
duke
parents:
diff changeset
614 jio_snprintf(_gnu_libc_version, sizeof(_gnu_libc_version),
a61af66fc99e Initial load
duke
parents:
diff changeset
615 "glibc %s %s", gnu_get_libc_version(), gnu_get_libc_release());
a61af66fc99e Initial load
duke
parents:
diff changeset
616 os::Linux::set_glibc_version(_gnu_libc_version);
a61af66fc99e Initial load
duke
parents:
diff changeset
617 }
a61af66fc99e Initial load
duke
parents:
diff changeset
618
a61af66fc99e Initial load
duke
parents:
diff changeset
619 n = confstr(_CS_GNU_LIBPTHREAD_VERSION, NULL, 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
620 if (n > 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
621 char *str = (char *)malloc(n);
a61af66fc99e Initial load
duke
parents:
diff changeset
622 confstr(_CS_GNU_LIBPTHREAD_VERSION, str, n);
a61af66fc99e Initial load
duke
parents:
diff changeset
623 // Vanilla RH-9 (glibc 2.3.2) has a bug that confstr() always tells
a61af66fc99e Initial load
duke
parents:
diff changeset
624 // us "NPTL-0.29" even we are running with LinuxThreads. Check if this
199
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
625 // is the case. LinuxThreads has a hard limit on max number of threads.
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
626 // So sysconf(_SC_THREAD_THREADS_MAX) will return a positive value.
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
627 // On the other hand, NPTL does not have such a limit, sysconf()
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
628 // will return -1 and errno is not changed. Check if it is really NPTL.
0
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parents:
diff changeset
629 if (strcmp(os::Linux::glibc_version(), "glibc 2.3.2") == 0 &&
199
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
630 strstr(str, "NPTL") &&
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
631 sysconf(_SC_THREAD_THREADS_MAX) > 0) {
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
632 free(str);
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
633 os::Linux::set_libpthread_version("linuxthreads");
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
634 } else {
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
635 os::Linux::set_libpthread_version(str);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
636 }
a61af66fc99e Initial load
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parents:
diff changeset
637 } else {
199
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
638 // glibc before 2.3.2 only has LinuxThreads.
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
639 os::Linux::set_libpthread_version("linuxthreads");
0
a61af66fc99e Initial load
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parents:
diff changeset
640 }
a61af66fc99e Initial load
duke
parents:
diff changeset
641
a61af66fc99e Initial load
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parents:
diff changeset
642 if (strstr(libpthread_version(), "NPTL")) {
a61af66fc99e Initial load
duke
parents:
diff changeset
643 os::Linux::set_is_NPTL();
a61af66fc99e Initial load
duke
parents:
diff changeset
644 } else {
a61af66fc99e Initial load
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parents:
diff changeset
645 os::Linux::set_is_LinuxThreads();
a61af66fc99e Initial load
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parents:
diff changeset
646 }
a61af66fc99e Initial load
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parents:
diff changeset
647
a61af66fc99e Initial load
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parents:
diff changeset
648 // LinuxThreads have two flavors: floating-stack mode, which allows variable
a61af66fc99e Initial load
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parents:
diff changeset
649 // stack size; and fixed-stack mode. NPTL is always floating-stack.
a61af66fc99e Initial load
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parents:
diff changeset
650 if (os::Linux::is_NPTL() || os::Linux::supports_variable_stack_size()) {
a61af66fc99e Initial load
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parents:
diff changeset
651 os::Linux::set_is_floating_stack();
a61af66fc99e Initial load
duke
parents:
diff changeset
652 }
a61af66fc99e Initial load
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parents:
diff changeset
653 }
a61af66fc99e Initial load
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parents:
diff changeset
654
a61af66fc99e Initial load
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parents:
diff changeset
655 /////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
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parents:
diff changeset
656 // thread stack
a61af66fc99e Initial load
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parents:
diff changeset
657
a61af66fc99e Initial load
duke
parents:
diff changeset
658 // Force Linux kernel to expand current thread stack. If "bottom" is close
a61af66fc99e Initial load
duke
parents:
diff changeset
659 // to the stack guard, caller should block all signals.
a61af66fc99e Initial load
duke
parents:
diff changeset
660 //
a61af66fc99e Initial load
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parents:
diff changeset
661 // MAP_GROWSDOWN:
a61af66fc99e Initial load
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parents:
diff changeset
662 // A special mmap() flag that is used to implement thread stacks. It tells
a61af66fc99e Initial load
duke
parents:
diff changeset
663 // kernel that the memory region should extend downwards when needed. This
a61af66fc99e Initial load
duke
parents:
diff changeset
664 // allows early versions of LinuxThreads to only mmap the first few pages
a61af66fc99e Initial load
duke
parents:
diff changeset
665 // when creating a new thread. Linux kernel will automatically expand thread
a61af66fc99e Initial load
duke
parents:
diff changeset
666 // stack as needed (on page faults).
a61af66fc99e Initial load
duke
parents:
diff changeset
667 //
a61af66fc99e Initial load
duke
parents:
diff changeset
668 // However, because the memory region of a MAP_GROWSDOWN stack can grow on
a61af66fc99e Initial load
duke
parents:
diff changeset
669 // demand, if a page fault happens outside an already mapped MAP_GROWSDOWN
a61af66fc99e Initial load
duke
parents:
diff changeset
670 // region, it's hard to tell if the fault is due to a legitimate stack
a61af66fc99e Initial load
duke
parents:
diff changeset
671 // access or because of reading/writing non-exist memory (e.g. buffer
a61af66fc99e Initial load
duke
parents:
diff changeset
672 // overrun). As a rule, if the fault happens below current stack pointer,
a61af66fc99e Initial load
duke
parents:
diff changeset
673 // Linux kernel does not expand stack, instead a SIGSEGV is sent to the
a61af66fc99e Initial load
duke
parents:
diff changeset
674 // application (see Linux kernel fault.c).
a61af66fc99e Initial load
duke
parents:
diff changeset
675 //
a61af66fc99e Initial load
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parents:
diff changeset
676 // This Linux feature can cause SIGSEGV when VM bangs thread stack for
a61af66fc99e Initial load
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parents:
diff changeset
677 // stack overflow detection.
a61af66fc99e Initial load
duke
parents:
diff changeset
678 //
a61af66fc99e Initial load
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parents:
diff changeset
679 // Newer version of LinuxThreads (since glibc-2.2, or, RH-7.x) and NPTL do
a61af66fc99e Initial load
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parents:
diff changeset
680 // not use this flag. However, the stack of initial thread is not created
a61af66fc99e Initial load
duke
parents:
diff changeset
681 // by pthread, it is still MAP_GROWSDOWN. Also it's possible (though
a61af66fc99e Initial load
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parents:
diff changeset
682 // unlikely) that user code can create a thread with MAP_GROWSDOWN stack
a61af66fc99e Initial load
duke
parents:
diff changeset
683 // and then attach the thread to JVM.
a61af66fc99e Initial load
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parents:
diff changeset
684 //
a61af66fc99e Initial load
duke
parents:
diff changeset
685 // To get around the problem and allow stack banging on Linux, we need to
a61af66fc99e Initial load
duke
parents:
diff changeset
686 // manually expand thread stack after receiving the SIGSEGV.
a61af66fc99e Initial load
duke
parents:
diff changeset
687 //
a61af66fc99e Initial load
duke
parents:
diff changeset
688 // There are two ways to expand thread stack to address "bottom", we used
a61af66fc99e Initial load
duke
parents:
diff changeset
689 // both of them in JVM before 1.5:
a61af66fc99e Initial load
duke
parents:
diff changeset
690 // 1. adjust stack pointer first so that it is below "bottom", and then
a61af66fc99e Initial load
duke
parents:
diff changeset
691 // touch "bottom"
a61af66fc99e Initial load
duke
parents:
diff changeset
692 // 2. mmap() the page in question
a61af66fc99e Initial load
duke
parents:
diff changeset
693 //
a61af66fc99e Initial load
duke
parents:
diff changeset
694 // Now alternate signal stack is gone, it's harder to use 2. For instance,
a61af66fc99e Initial load
duke
parents:
diff changeset
695 // if current sp is already near the lower end of page 101, and we need to
a61af66fc99e Initial load
duke
parents:
diff changeset
696 // call mmap() to map page 100, it is possible that part of the mmap() frame
a61af66fc99e Initial load
duke
parents:
diff changeset
697 // will be placed in page 100. When page 100 is mapped, it is zero-filled.
a61af66fc99e Initial load
duke
parents:
diff changeset
698 // That will destroy the mmap() frame and cause VM to crash.
a61af66fc99e Initial load
duke
parents:
diff changeset
699 //
a61af66fc99e Initial load
duke
parents:
diff changeset
700 // The following code works by adjusting sp first, then accessing the "bottom"
a61af66fc99e Initial load
duke
parents:
diff changeset
701 // page to force a page fault. Linux kernel will then automatically expand the
a61af66fc99e Initial load
duke
parents:
diff changeset
702 // stack mapping.
a61af66fc99e Initial load
duke
parents:
diff changeset
703 //
a61af66fc99e Initial load
duke
parents:
diff changeset
704 // _expand_stack_to() assumes its frame size is less than page size, which
a61af66fc99e Initial load
duke
parents:
diff changeset
705 // should always be true if the function is not inlined.
a61af66fc99e Initial load
duke
parents:
diff changeset
706
a61af66fc99e Initial load
duke
parents:
diff changeset
707 #if __GNUC__ < 3 // gcc 2.x does not support noinline attribute
a61af66fc99e Initial load
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parents:
diff changeset
708 #define NOINLINE
a61af66fc99e Initial load
duke
parents:
diff changeset
709 #else
a61af66fc99e Initial load
duke
parents:
diff changeset
710 #define NOINLINE __attribute__ ((noinline))
a61af66fc99e Initial load
duke
parents:
diff changeset
711 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
712
a61af66fc99e Initial load
duke
parents:
diff changeset
713 static void _expand_stack_to(address bottom) NOINLINE;
a61af66fc99e Initial load
duke
parents:
diff changeset
714
a61af66fc99e Initial load
duke
parents:
diff changeset
715 static void _expand_stack_to(address bottom) {
a61af66fc99e Initial load
duke
parents:
diff changeset
716 address sp;
a61af66fc99e Initial load
duke
parents:
diff changeset
717 size_t size;
a61af66fc99e Initial load
duke
parents:
diff changeset
718 volatile char *p;
a61af66fc99e Initial load
duke
parents:
diff changeset
719
a61af66fc99e Initial load
duke
parents:
diff changeset
720 // Adjust bottom to point to the largest address within the same page, it
a61af66fc99e Initial load
duke
parents:
diff changeset
721 // gives us a one-page buffer if alloca() allocates slightly more memory.
a61af66fc99e Initial load
duke
parents:
diff changeset
722 bottom = (address)align_size_down((uintptr_t)bottom, os::Linux::page_size());
a61af66fc99e Initial load
duke
parents:
diff changeset
723 bottom += os::Linux::page_size() - 1;
a61af66fc99e Initial load
duke
parents:
diff changeset
724
a61af66fc99e Initial load
duke
parents:
diff changeset
725 // sp might be slightly above current stack pointer; if that's the case, we
a61af66fc99e Initial load
duke
parents:
diff changeset
726 // will alloca() a little more space than necessary, which is OK. Don't use
a61af66fc99e Initial load
duke
parents:
diff changeset
727 // os::current_stack_pointer(), as its result can be slightly below current
a61af66fc99e Initial load
duke
parents:
diff changeset
728 // stack pointer, causing us to not alloca enough to reach "bottom".
a61af66fc99e Initial load
duke
parents:
diff changeset
729 sp = (address)&sp;
a61af66fc99e Initial load
duke
parents:
diff changeset
730
a61af66fc99e Initial load
duke
parents:
diff changeset
731 if (sp > bottom) {
a61af66fc99e Initial load
duke
parents:
diff changeset
732 size = sp - bottom;
a61af66fc99e Initial load
duke
parents:
diff changeset
733 p = (volatile char *)alloca(size);
a61af66fc99e Initial load
duke
parents:
diff changeset
734 assert(p != NULL && p <= (volatile char *)bottom, "alloca problem?");
a61af66fc99e Initial load
duke
parents:
diff changeset
735 p[0] = '\0';
a61af66fc99e Initial load
duke
parents:
diff changeset
736 }
a61af66fc99e Initial load
duke
parents:
diff changeset
737 }
a61af66fc99e Initial load
duke
parents:
diff changeset
738
a61af66fc99e Initial load
duke
parents:
diff changeset
739 bool os::Linux::manually_expand_stack(JavaThread * t, address addr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
740 assert(t!=NULL, "just checking");
a61af66fc99e Initial load
duke
parents:
diff changeset
741 assert(t->osthread()->expanding_stack(), "expand should be set");
a61af66fc99e Initial load
duke
parents:
diff changeset
742 assert(t->stack_base() != NULL, "stack_base was not initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
743
a61af66fc99e Initial load
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parents:
diff changeset
744 if (addr < t->stack_base() && addr >= t->stack_yellow_zone_base()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
745 sigset_t mask_all, old_sigset;
a61af66fc99e Initial load
duke
parents:
diff changeset
746 sigfillset(&mask_all);
a61af66fc99e Initial load
duke
parents:
diff changeset
747 pthread_sigmask(SIG_SETMASK, &mask_all, &old_sigset);
a61af66fc99e Initial load
duke
parents:
diff changeset
748 _expand_stack_to(addr);
a61af66fc99e Initial load
duke
parents:
diff changeset
749 pthread_sigmask(SIG_SETMASK, &old_sigset, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
750 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
751 }
a61af66fc99e Initial load
duke
parents:
diff changeset
752 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
753 }
a61af66fc99e Initial load
duke
parents:
diff changeset
754
a61af66fc99e Initial load
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parents:
diff changeset
755 //////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
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parents:
diff changeset
756 // create new thread
a61af66fc99e Initial load
duke
parents:
diff changeset
757
a61af66fc99e Initial load
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parents:
diff changeset
758 static address highest_vm_reserved_address();
a61af66fc99e Initial load
duke
parents:
diff changeset
759
a61af66fc99e Initial load
duke
parents:
diff changeset
760 // check if it's safe to start a new thread
a61af66fc99e Initial load
duke
parents:
diff changeset
761 static bool _thread_safety_check(Thread* thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
762 if (os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
763 // Fixed stack LinuxThreads (SuSE Linux/x86, and some versions of Redhat)
a61af66fc99e Initial load
duke
parents:
diff changeset
764 // Heap is mmap'ed at lower end of memory space. Thread stacks are
a61af66fc99e Initial load
duke
parents:
diff changeset
765 // allocated (MAP_FIXED) from high address space. Every thread stack
a61af66fc99e Initial load
duke
parents:
diff changeset
766 // occupies a fixed size slot (usually 2Mbytes, but user can change
a61af66fc99e Initial load
duke
parents:
diff changeset
767 // it to other values if they rebuild LinuxThreads).
a61af66fc99e Initial load
duke
parents:
diff changeset
768 //
a61af66fc99e Initial load
duke
parents:
diff changeset
769 // Problem with MAP_FIXED is that mmap() can still succeed even part of
a61af66fc99e Initial load
duke
parents:
diff changeset
770 // the memory region has already been mmap'ed. That means if we have too
a61af66fc99e Initial load
duke
parents:
diff changeset
771 // many threads and/or very large heap, eventually thread stack will
a61af66fc99e Initial load
duke
parents:
diff changeset
772 // collide with heap.
a61af66fc99e Initial load
duke
parents:
diff changeset
773 //
a61af66fc99e Initial load
duke
parents:
diff changeset
774 // Here we try to prevent heap/stack collision by comparing current
a61af66fc99e Initial load
duke
parents:
diff changeset
775 // stack bottom with the highest address that has been mmap'ed by JVM
a61af66fc99e Initial load
duke
parents:
diff changeset
776 // plus a safety margin for memory maps created by native code.
a61af66fc99e Initial load
duke
parents:
diff changeset
777 //
a61af66fc99e Initial load
duke
parents:
diff changeset
778 // This feature can be disabled by setting ThreadSafetyMargin to 0
a61af66fc99e Initial load
duke
parents:
diff changeset
779 //
a61af66fc99e Initial load
duke
parents:
diff changeset
780 if (ThreadSafetyMargin > 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
781 address stack_bottom = os::current_stack_base() - os::current_stack_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
782
a61af66fc99e Initial load
duke
parents:
diff changeset
783 // not safe if our stack extends below the safety margin
a61af66fc99e Initial load
duke
parents:
diff changeset
784 return stack_bottom - ThreadSafetyMargin >= highest_vm_reserved_address();
a61af66fc99e Initial load
duke
parents:
diff changeset
785 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
786 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
787 }
a61af66fc99e Initial load
duke
parents:
diff changeset
788 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
789 // Floating stack LinuxThreads or NPTL:
a61af66fc99e Initial load
duke
parents:
diff changeset
790 // Unlike fixed stack LinuxThreads, thread stacks are not MAP_FIXED. When
a61af66fc99e Initial load
duke
parents:
diff changeset
791 // there's not enough space left, pthread_create() will fail. If we come
a61af66fc99e Initial load
duke
parents:
diff changeset
792 // here, that means enough space has been reserved for stack.
a61af66fc99e Initial load
duke
parents:
diff changeset
793 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
794 }
a61af66fc99e Initial load
duke
parents:
diff changeset
795 }
a61af66fc99e Initial load
duke
parents:
diff changeset
796
a61af66fc99e Initial load
duke
parents:
diff changeset
797 // Thread start routine for all newly created threads
a61af66fc99e Initial load
duke
parents:
diff changeset
798 static void *java_start(Thread *thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
799 // Try to randomize the cache line index of hot stack frames.
a61af66fc99e Initial load
duke
parents:
diff changeset
800 // This helps when threads of the same stack traces evict each other's
a61af66fc99e Initial load
duke
parents:
diff changeset
801 // cache lines. The threads can be either from the same JVM instance, or
a61af66fc99e Initial load
duke
parents:
diff changeset
802 // from different JVM instances. The benefit is especially true for
a61af66fc99e Initial load
duke
parents:
diff changeset
803 // processors with hyperthreading technology.
a61af66fc99e Initial load
duke
parents:
diff changeset
804 static int counter = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
805 int pid = os::current_process_id();
a61af66fc99e Initial load
duke
parents:
diff changeset
806 alloca(((pid ^ counter++) & 7) * 128);
a61af66fc99e Initial load
duke
parents:
diff changeset
807
a61af66fc99e Initial load
duke
parents:
diff changeset
808 ThreadLocalStorage::set_thread(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
809
a61af66fc99e Initial load
duke
parents:
diff changeset
810 OSThread* osthread = thread->osthread();
a61af66fc99e Initial load
duke
parents:
diff changeset
811 Monitor* sync = osthread->startThread_lock();
a61af66fc99e Initial load
duke
parents:
diff changeset
812
a61af66fc99e Initial load
duke
parents:
diff changeset
813 // non floating stack LinuxThreads needs extra check, see above
a61af66fc99e Initial load
duke
parents:
diff changeset
814 if (!_thread_safety_check(thread)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
815 // notify parent thread
a61af66fc99e Initial load
duke
parents:
diff changeset
816 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
817 osthread->set_state(ZOMBIE);
a61af66fc99e Initial load
duke
parents:
diff changeset
818 sync->notify_all();
a61af66fc99e Initial load
duke
parents:
diff changeset
819 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
820 }
a61af66fc99e Initial load
duke
parents:
diff changeset
821
a61af66fc99e Initial load
duke
parents:
diff changeset
822 // thread_id is kernel thread id (similar to Solaris LWP id)
a61af66fc99e Initial load
duke
parents:
diff changeset
823 osthread->set_thread_id(os::Linux::gettid());
a61af66fc99e Initial load
duke
parents:
diff changeset
824
a61af66fc99e Initial load
duke
parents:
diff changeset
825 if (UseNUMA) {
a61af66fc99e Initial load
duke
parents:
diff changeset
826 int lgrp_id = os::numa_get_group_id();
a61af66fc99e Initial load
duke
parents:
diff changeset
827 if (lgrp_id != -1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
828 thread->set_lgrp_id(lgrp_id);
a61af66fc99e Initial load
duke
parents:
diff changeset
829 }
a61af66fc99e Initial load
duke
parents:
diff changeset
830 }
a61af66fc99e Initial load
duke
parents:
diff changeset
831 // initialize signal mask for this thread
a61af66fc99e Initial load
duke
parents:
diff changeset
832 os::Linux::hotspot_sigmask(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
833
a61af66fc99e Initial load
duke
parents:
diff changeset
834 // initialize floating point control register
a61af66fc99e Initial load
duke
parents:
diff changeset
835 os::Linux::init_thread_fpu_state();
a61af66fc99e Initial load
duke
parents:
diff changeset
836
a61af66fc99e Initial load
duke
parents:
diff changeset
837 // handshaking with parent thread
a61af66fc99e Initial load
duke
parents:
diff changeset
838 {
a61af66fc99e Initial load
duke
parents:
diff changeset
839 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
840
a61af66fc99e Initial load
duke
parents:
diff changeset
841 // notify parent thread
a61af66fc99e Initial load
duke
parents:
diff changeset
842 osthread->set_state(INITIALIZED);
a61af66fc99e Initial load
duke
parents:
diff changeset
843 sync->notify_all();
a61af66fc99e Initial load
duke
parents:
diff changeset
844
a61af66fc99e Initial load
duke
parents:
diff changeset
845 // wait until os::start_thread()
a61af66fc99e Initial load
duke
parents:
diff changeset
846 while (osthread->get_state() == INITIALIZED) {
a61af66fc99e Initial load
duke
parents:
diff changeset
847 sync->wait(Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
848 }
a61af66fc99e Initial load
duke
parents:
diff changeset
849 }
a61af66fc99e Initial load
duke
parents:
diff changeset
850
a61af66fc99e Initial load
duke
parents:
diff changeset
851 // call one more level start routine
a61af66fc99e Initial load
duke
parents:
diff changeset
852 thread->run();
a61af66fc99e Initial load
duke
parents:
diff changeset
853
a61af66fc99e Initial load
duke
parents:
diff changeset
854 return 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
855 }
a61af66fc99e Initial load
duke
parents:
diff changeset
856
a61af66fc99e Initial load
duke
parents:
diff changeset
857 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
a61af66fc99e Initial load
duke
parents:
diff changeset
858 assert(thread->osthread() == NULL, "caller responsible");
a61af66fc99e Initial load
duke
parents:
diff changeset
859
a61af66fc99e Initial load
duke
parents:
diff changeset
860 // Allocate the OSThread object
a61af66fc99e Initial load
duke
parents:
diff changeset
861 OSThread* osthread = new OSThread(NULL, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
862 if (osthread == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
863 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
864 }
a61af66fc99e Initial load
duke
parents:
diff changeset
865
a61af66fc99e Initial load
duke
parents:
diff changeset
866 // set the correct thread state
a61af66fc99e Initial load
duke
parents:
diff changeset
867 osthread->set_thread_type(thr_type);
a61af66fc99e Initial load
duke
parents:
diff changeset
868
a61af66fc99e Initial load
duke
parents:
diff changeset
869 // Initial state is ALLOCATED but not INITIALIZED
a61af66fc99e Initial load
duke
parents:
diff changeset
870 osthread->set_state(ALLOCATED);
a61af66fc99e Initial load
duke
parents:
diff changeset
871
a61af66fc99e Initial load
duke
parents:
diff changeset
872 thread->set_osthread(osthread);
a61af66fc99e Initial load
duke
parents:
diff changeset
873
a61af66fc99e Initial load
duke
parents:
diff changeset
874 // init thread attributes
a61af66fc99e Initial load
duke
parents:
diff changeset
875 pthread_attr_t attr;
a61af66fc99e Initial load
duke
parents:
diff changeset
876 pthread_attr_init(&attr);
a61af66fc99e Initial load
duke
parents:
diff changeset
877 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
a61af66fc99e Initial load
duke
parents:
diff changeset
878
a61af66fc99e Initial load
duke
parents:
diff changeset
879 // stack size
a61af66fc99e Initial load
duke
parents:
diff changeset
880 if (os::Linux::supports_variable_stack_size()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
881 // calculate stack size if it's not specified by caller
a61af66fc99e Initial load
duke
parents:
diff changeset
882 if (stack_size == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
883 stack_size = os::Linux::default_stack_size(thr_type);
a61af66fc99e Initial load
duke
parents:
diff changeset
884
a61af66fc99e Initial load
duke
parents:
diff changeset
885 switch (thr_type) {
a61af66fc99e Initial load
duke
parents:
diff changeset
886 case os::java_thread:
1867
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
887 // Java threads use ThreadStackSize which default value can be
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
888 // changed with the flag -Xss
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
889 assert (JavaThread::stack_size_at_create() > 0, "this should be set");
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
890 stack_size = JavaThread::stack_size_at_create();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
891 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
892 case os::compiler_thread:
a61af66fc99e Initial load
duke
parents:
diff changeset
893 if (CompilerThreadStackSize > 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
894 stack_size = (size_t)(CompilerThreadStackSize * K);
a61af66fc99e Initial load
duke
parents:
diff changeset
895 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
896 } // else fall through:
a61af66fc99e Initial load
duke
parents:
diff changeset
897 // use VMThreadStackSize if CompilerThreadStackSize is not defined
a61af66fc99e Initial load
duke
parents:
diff changeset
898 case os::vm_thread:
a61af66fc99e Initial load
duke
parents:
diff changeset
899 case os::pgc_thread:
a61af66fc99e Initial load
duke
parents:
diff changeset
900 case os::cgc_thread:
a61af66fc99e Initial load
duke
parents:
diff changeset
901 case os::watcher_thread:
a61af66fc99e Initial load
duke
parents:
diff changeset
902 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
a61af66fc99e Initial load
duke
parents:
diff changeset
903 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
904 }
a61af66fc99e Initial load
duke
parents:
diff changeset
905 }
a61af66fc99e Initial load
duke
parents:
diff changeset
906
a61af66fc99e Initial load
duke
parents:
diff changeset
907 stack_size = MAX2(stack_size, os::Linux::min_stack_allowed);
a61af66fc99e Initial load
duke
parents:
diff changeset
908 pthread_attr_setstacksize(&attr, stack_size);
a61af66fc99e Initial load
duke
parents:
diff changeset
909 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
910 // let pthread_create() pick the default value.
a61af66fc99e Initial load
duke
parents:
diff changeset
911 }
a61af66fc99e Initial load
duke
parents:
diff changeset
912
a61af66fc99e Initial load
duke
parents:
diff changeset
913 // glibc guard page
a61af66fc99e Initial load
duke
parents:
diff changeset
914 pthread_attr_setguardsize(&attr, os::Linux::default_guard_size(thr_type));
a61af66fc99e Initial load
duke
parents:
diff changeset
915
a61af66fc99e Initial load
duke
parents:
diff changeset
916 ThreadState state;
a61af66fc99e Initial load
duke
parents:
diff changeset
917
a61af66fc99e Initial load
duke
parents:
diff changeset
918 {
a61af66fc99e Initial load
duke
parents:
diff changeset
919 // Serialize thread creation if we are running with fixed stack LinuxThreads
a61af66fc99e Initial load
duke
parents:
diff changeset
920 bool lock = os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack();
a61af66fc99e Initial load
duke
parents:
diff changeset
921 if (lock) {
a61af66fc99e Initial load
duke
parents:
diff changeset
922 os::Linux::createThread_lock()->lock_without_safepoint_check();
a61af66fc99e Initial load
duke
parents:
diff changeset
923 }
a61af66fc99e Initial load
duke
parents:
diff changeset
924
a61af66fc99e Initial load
duke
parents:
diff changeset
925 pthread_t tid;
a61af66fc99e Initial load
duke
parents:
diff changeset
926 int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
927
a61af66fc99e Initial load
duke
parents:
diff changeset
928 pthread_attr_destroy(&attr);
a61af66fc99e Initial load
duke
parents:
diff changeset
929
a61af66fc99e Initial load
duke
parents:
diff changeset
930 if (ret != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
931 if (PrintMiscellaneous && (Verbose || WizardMode)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
932 perror("pthread_create()");
a61af66fc99e Initial load
duke
parents:
diff changeset
933 }
a61af66fc99e Initial load
duke
parents:
diff changeset
934 // Need to clean up stuff we've allocated so far
a61af66fc99e Initial load
duke
parents:
diff changeset
935 thread->set_osthread(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
936 delete osthread;
a61af66fc99e Initial load
duke
parents:
diff changeset
937 if (lock) os::Linux::createThread_lock()->unlock();
a61af66fc99e Initial load
duke
parents:
diff changeset
938 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
939 }
a61af66fc99e Initial load
duke
parents:
diff changeset
940
a61af66fc99e Initial load
duke
parents:
diff changeset
941 // Store pthread info into the OSThread
a61af66fc99e Initial load
duke
parents:
diff changeset
942 osthread->set_pthread_id(tid);
a61af66fc99e Initial load
duke
parents:
diff changeset
943
a61af66fc99e Initial load
duke
parents:
diff changeset
944 // Wait until child thread is either initialized or aborted
a61af66fc99e Initial load
duke
parents:
diff changeset
945 {
a61af66fc99e Initial load
duke
parents:
diff changeset
946 Monitor* sync_with_child = osthread->startThread_lock();
a61af66fc99e Initial load
duke
parents:
diff changeset
947 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
948 while ((state = osthread->get_state()) == ALLOCATED) {
a61af66fc99e Initial load
duke
parents:
diff changeset
949 sync_with_child->wait(Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
950 }
a61af66fc99e Initial load
duke
parents:
diff changeset
951 }
a61af66fc99e Initial load
duke
parents:
diff changeset
952
a61af66fc99e Initial load
duke
parents:
diff changeset
953 if (lock) {
a61af66fc99e Initial load
duke
parents:
diff changeset
954 os::Linux::createThread_lock()->unlock();
a61af66fc99e Initial load
duke
parents:
diff changeset
955 }
a61af66fc99e Initial load
duke
parents:
diff changeset
956 }
a61af66fc99e Initial load
duke
parents:
diff changeset
957
a61af66fc99e Initial load
duke
parents:
diff changeset
958 // Aborted due to thread limit being reached
a61af66fc99e Initial load
duke
parents:
diff changeset
959 if (state == ZOMBIE) {
a61af66fc99e Initial load
duke
parents:
diff changeset
960 thread->set_osthread(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
961 delete osthread;
a61af66fc99e Initial load
duke
parents:
diff changeset
962 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
963 }
a61af66fc99e Initial load
duke
parents:
diff changeset
964
a61af66fc99e Initial load
duke
parents:
diff changeset
965 // The thread is returned suspended (in state INITIALIZED),
a61af66fc99e Initial load
duke
parents:
diff changeset
966 // and is started higher up in the call chain
a61af66fc99e Initial load
duke
parents:
diff changeset
967 assert(state == INITIALIZED, "race condition");
a61af66fc99e Initial load
duke
parents:
diff changeset
968 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
969 }
a61af66fc99e Initial load
duke
parents:
diff changeset
970
a61af66fc99e Initial load
duke
parents:
diff changeset
971 /////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
972 // attach existing thread
a61af66fc99e Initial load
duke
parents:
diff changeset
973
a61af66fc99e Initial load
duke
parents:
diff changeset
974 // bootstrap the main thread
a61af66fc99e Initial load
duke
parents:
diff changeset
975 bool os::create_main_thread(JavaThread* thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
976 assert(os::Linux::_main_thread == pthread_self(), "should be called inside main thread");
a61af66fc99e Initial load
duke
parents:
diff changeset
977 return create_attached_thread(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
978 }
a61af66fc99e Initial load
duke
parents:
diff changeset
979
a61af66fc99e Initial load
duke
parents:
diff changeset
980 bool os::create_attached_thread(JavaThread* thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
981 #ifdef ASSERT
a61af66fc99e Initial load
duke
parents:
diff changeset
982 thread->verify_not_published();
a61af66fc99e Initial load
duke
parents:
diff changeset
983 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
984
a61af66fc99e Initial load
duke
parents:
diff changeset
985 // Allocate the OSThread object
a61af66fc99e Initial load
duke
parents:
diff changeset
986 OSThread* osthread = new OSThread(NULL, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
987
a61af66fc99e Initial load
duke
parents:
diff changeset
988 if (osthread == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
989 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
990 }
a61af66fc99e Initial load
duke
parents:
diff changeset
991
a61af66fc99e Initial load
duke
parents:
diff changeset
992 // Store pthread info into the OSThread
a61af66fc99e Initial load
duke
parents:
diff changeset
993 osthread->set_thread_id(os::Linux::gettid());
a61af66fc99e Initial load
duke
parents:
diff changeset
994 osthread->set_pthread_id(::pthread_self());
a61af66fc99e Initial load
duke
parents:
diff changeset
995
a61af66fc99e Initial load
duke
parents:
diff changeset
996 // initialize floating point control register
a61af66fc99e Initial load
duke
parents:
diff changeset
997 os::Linux::init_thread_fpu_state();
a61af66fc99e Initial load
duke
parents:
diff changeset
998
a61af66fc99e Initial load
duke
parents:
diff changeset
999 // Initial thread state is RUNNABLE
a61af66fc99e Initial load
duke
parents:
diff changeset
1000 osthread->set_state(RUNNABLE);
a61af66fc99e Initial load
duke
parents:
diff changeset
1001
a61af66fc99e Initial load
duke
parents:
diff changeset
1002 thread->set_osthread(osthread);
a61af66fc99e Initial load
duke
parents:
diff changeset
1003
a61af66fc99e Initial load
duke
parents:
diff changeset
1004 if (UseNUMA) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1005 int lgrp_id = os::numa_get_group_id();
a61af66fc99e Initial load
duke
parents:
diff changeset
1006 if (lgrp_id != -1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1007 thread->set_lgrp_id(lgrp_id);
a61af66fc99e Initial load
duke
parents:
diff changeset
1008 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1009 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1010
a61af66fc99e Initial load
duke
parents:
diff changeset
1011 if (os::Linux::is_initial_thread()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1012 // If current thread is initial thread, its stack is mapped on demand,
a61af66fc99e Initial load
duke
parents:
diff changeset
1013 // see notes about MAP_GROWSDOWN. Here we try to force kernel to map
a61af66fc99e Initial load
duke
parents:
diff changeset
1014 // the entire stack region to avoid SEGV in stack banging.
a61af66fc99e Initial load
duke
parents:
diff changeset
1015 // It is also useful to get around the heap-stack-gap problem on SuSE
a61af66fc99e Initial load
duke
parents:
diff changeset
1016 // kernel (see 4821821 for details). We first expand stack to the top
a61af66fc99e Initial load
duke
parents:
diff changeset
1017 // of yellow zone, then enable stack yellow zone (order is significant,
a61af66fc99e Initial load
duke
parents:
diff changeset
1018 // enabling yellow zone first will crash JVM on SuSE Linux), so there
a61af66fc99e Initial load
duke
parents:
diff changeset
1019 // is no gap between the last two virtual memory regions.
a61af66fc99e Initial load
duke
parents:
diff changeset
1020
a61af66fc99e Initial load
duke
parents:
diff changeset
1021 JavaThread *jt = (JavaThread *)thread;
a61af66fc99e Initial load
duke
parents:
diff changeset
1022 address addr = jt->stack_yellow_zone_base();
a61af66fc99e Initial load
duke
parents:
diff changeset
1023 assert(addr != NULL, "initialization problem?");
a61af66fc99e Initial load
duke
parents:
diff changeset
1024 assert(jt->stack_available(addr) > 0, "stack guard should not be enabled");
a61af66fc99e Initial load
duke
parents:
diff changeset
1025
a61af66fc99e Initial load
duke
parents:
diff changeset
1026 osthread->set_expanding_stack();
a61af66fc99e Initial load
duke
parents:
diff changeset
1027 os::Linux::manually_expand_stack(jt, addr);
a61af66fc99e Initial load
duke
parents:
diff changeset
1028 osthread->clear_expanding_stack();
a61af66fc99e Initial load
duke
parents:
diff changeset
1029 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1030
a61af66fc99e Initial load
duke
parents:
diff changeset
1031 // initialize signal mask for this thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1032 // and save the caller's signal mask
a61af66fc99e Initial load
duke
parents:
diff changeset
1033 os::Linux::hotspot_sigmask(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
1034
a61af66fc99e Initial load
duke
parents:
diff changeset
1035 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1036 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1037
a61af66fc99e Initial load
duke
parents:
diff changeset
1038 void os::pd_start_thread(Thread* thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1039 OSThread * osthread = thread->osthread();
a61af66fc99e Initial load
duke
parents:
diff changeset
1040 assert(osthread->get_state() != INITIALIZED, "just checking");
a61af66fc99e Initial load
duke
parents:
diff changeset
1041 Monitor* sync_with_child = osthread->startThread_lock();
a61af66fc99e Initial load
duke
parents:
diff changeset
1042 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
1043 sync_with_child->notify();
a61af66fc99e Initial load
duke
parents:
diff changeset
1044 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1045
a61af66fc99e Initial load
duke
parents:
diff changeset
1046 // Free Linux resources related to the OSThread
a61af66fc99e Initial load
duke
parents:
diff changeset
1047 void os::free_thread(OSThread* osthread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1048 assert(osthread != NULL, "osthread not set");
a61af66fc99e Initial load
duke
parents:
diff changeset
1049
a61af66fc99e Initial load
duke
parents:
diff changeset
1050 if (Thread::current()->osthread() == osthread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1051 // Restore caller's signal mask
a61af66fc99e Initial load
duke
parents:
diff changeset
1052 sigset_t sigmask = osthread->caller_sigmask();
a61af66fc99e Initial load
duke
parents:
diff changeset
1053 pthread_sigmask(SIG_SETMASK, &sigmask, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1054 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1055
a61af66fc99e Initial load
duke
parents:
diff changeset
1056 delete osthread;
a61af66fc99e Initial load
duke
parents:
diff changeset
1057 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1058
a61af66fc99e Initial load
duke
parents:
diff changeset
1059 //////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
1060 // thread local storage
a61af66fc99e Initial load
duke
parents:
diff changeset
1061
a61af66fc99e Initial load
duke
parents:
diff changeset
1062 int os::allocate_thread_local_storage() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1063 pthread_key_t key;
a61af66fc99e Initial load
duke
parents:
diff changeset
1064 int rslt = pthread_key_create(&key, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1065 assert(rslt == 0, "cannot allocate thread local storage");
a61af66fc99e Initial load
duke
parents:
diff changeset
1066 return (int)key;
a61af66fc99e Initial load
duke
parents:
diff changeset
1067 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1068
a61af66fc99e Initial load
duke
parents:
diff changeset
1069 // Note: This is currently not used by VM, as we don't destroy TLS key
a61af66fc99e Initial load
duke
parents:
diff changeset
1070 // on VM exit.
a61af66fc99e Initial load
duke
parents:
diff changeset
1071 void os::free_thread_local_storage(int index) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1072 int rslt = pthread_key_delete((pthread_key_t)index);
a61af66fc99e Initial load
duke
parents:
diff changeset
1073 assert(rslt == 0, "invalid index");
a61af66fc99e Initial load
duke
parents:
diff changeset
1074 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1075
a61af66fc99e Initial load
duke
parents:
diff changeset
1076 void os::thread_local_storage_at_put(int index, void* value) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1077 int rslt = pthread_setspecific((pthread_key_t)index, value);
a61af66fc99e Initial load
duke
parents:
diff changeset
1078 assert(rslt == 0, "pthread_setspecific failed");
a61af66fc99e Initial load
duke
parents:
diff changeset
1079 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1080
a61af66fc99e Initial load
duke
parents:
diff changeset
1081 extern "C" Thread* get_thread() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1082 return ThreadLocalStorage::thread();
a61af66fc99e Initial load
duke
parents:
diff changeset
1083 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1084
a61af66fc99e Initial load
duke
parents:
diff changeset
1085 //////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
1086 // initial thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1087
a61af66fc99e Initial load
duke
parents:
diff changeset
1088 // Check if current thread is the initial thread, similar to Solaris thr_main.
a61af66fc99e Initial load
duke
parents:
diff changeset
1089 bool os::Linux::is_initial_thread(void) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1090 char dummy;
a61af66fc99e Initial load
duke
parents:
diff changeset
1091 // If called before init complete, thread stack bottom will be null.
a61af66fc99e Initial load
duke
parents:
diff changeset
1092 // Can be called if fatal error occurs before initialization.
a61af66fc99e Initial load
duke
parents:
diff changeset
1093 if (initial_thread_stack_bottom() == NULL) return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1094 assert(initial_thread_stack_bottom() != NULL &&
a61af66fc99e Initial load
duke
parents:
diff changeset
1095 initial_thread_stack_size() != 0,
a61af66fc99e Initial load
duke
parents:
diff changeset
1096 "os::init did not locate initial thread's stack region");
a61af66fc99e Initial load
duke
parents:
diff changeset
1097 if ((address)&dummy >= initial_thread_stack_bottom() &&
a61af66fc99e Initial load
duke
parents:
diff changeset
1098 (address)&dummy < initial_thread_stack_bottom() + initial_thread_stack_size())
a61af66fc99e Initial load
duke
parents:
diff changeset
1099 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1100 else return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1101 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1102
a61af66fc99e Initial load
duke
parents:
diff changeset
1103 // Find the virtual memory area that contains addr
a61af66fc99e Initial load
duke
parents:
diff changeset
1104 static bool find_vma(address addr, address* vma_low, address* vma_high) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1105 FILE *fp = fopen("/proc/self/maps", "r");
a61af66fc99e Initial load
duke
parents:
diff changeset
1106 if (fp) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1107 address low, high;
a61af66fc99e Initial load
duke
parents:
diff changeset
1108 while (!feof(fp)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1109 if (fscanf(fp, "%p-%p", &low, &high) == 2) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1110 if (low <= addr && addr < high) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1111 if (vma_low) *vma_low = low;
a61af66fc99e Initial load
duke
parents:
diff changeset
1112 if (vma_high) *vma_high = high;
a61af66fc99e Initial load
duke
parents:
diff changeset
1113 fclose (fp);
a61af66fc99e Initial load
duke
parents:
diff changeset
1114 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1115 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1116 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1117 for (;;) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1118 int ch = fgetc(fp);
a61af66fc99e Initial load
duke
parents:
diff changeset
1119 if (ch == EOF || ch == (int)'\n') break;
a61af66fc99e Initial load
duke
parents:
diff changeset
1120 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1121 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1122 fclose(fp);
a61af66fc99e Initial load
duke
parents:
diff changeset
1123 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1124 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1125 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1126
a61af66fc99e Initial load
duke
parents:
diff changeset
1127 // Locate initial thread stack. This special handling of initial thread stack
a61af66fc99e Initial load
duke
parents:
diff changeset
1128 // is needed because pthread_getattr_np() on most (all?) Linux distros returns
a61af66fc99e Initial load
duke
parents:
diff changeset
1129 // bogus value for initial thread.
a61af66fc99e Initial load
duke
parents:
diff changeset
1130 void os::Linux::capture_initial_stack(size_t max_size) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1131 // stack size is the easy part, get it from RLIMIT_STACK
a61af66fc99e Initial load
duke
parents:
diff changeset
1132 size_t stack_size;
a61af66fc99e Initial load
duke
parents:
diff changeset
1133 struct rlimit rlim;
a61af66fc99e Initial load
duke
parents:
diff changeset
1134 getrlimit(RLIMIT_STACK, &rlim);
a61af66fc99e Initial load
duke
parents:
diff changeset
1135 stack_size = rlim.rlim_cur;
a61af66fc99e Initial load
duke
parents:
diff changeset
1136
a61af66fc99e Initial load
duke
parents:
diff changeset
1137 // 6308388: a bug in ld.so will relocate its own .data section to the
a61af66fc99e Initial load
duke
parents:
diff changeset
1138 // lower end of primordial stack; reduce ulimit -s value a little bit
a61af66fc99e Initial load
duke
parents:
diff changeset
1139 // so we won't install guard page on ld.so's data section.
a61af66fc99e Initial load
duke
parents:
diff changeset
1140 stack_size -= 2 * page_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
1141
a61af66fc99e Initial load
duke
parents:
diff changeset
1142 // 4441425: avoid crash with "unlimited" stack size on SuSE 7.1 or Redhat
a61af66fc99e Initial load
duke
parents:
diff changeset
1143 // 7.1, in both cases we will get 2G in return value.
a61af66fc99e Initial load
duke
parents:
diff changeset
1144 // 4466587: glibc 2.2.x compiled w/o "--enable-kernel=2.4.0" (RH 7.0,
a61af66fc99e Initial load
duke
parents:
diff changeset
1145 // SuSE 7.2, Debian) can not handle alternate signal stack correctly
a61af66fc99e Initial load
duke
parents:
diff changeset
1146 // for initial thread if its stack size exceeds 6M. Cap it at 2M,
a61af66fc99e Initial load
duke
parents:
diff changeset
1147 // in case other parts in glibc still assumes 2M max stack size.
a61af66fc99e Initial load
duke
parents:
diff changeset
1148 // FIXME: alt signal stack is gone, maybe we can relax this constraint?
a61af66fc99e Initial load
duke
parents:
diff changeset
1149 #ifndef IA64
a61af66fc99e Initial load
duke
parents:
diff changeset
1150 if (stack_size > 2 * K * K) stack_size = 2 * K * K;
a61af66fc99e Initial load
duke
parents:
diff changeset
1151 #else
a61af66fc99e Initial load
duke
parents:
diff changeset
1152 // Problem still exists RH7.2 (IA64 anyway) but 2MB is a little small
a61af66fc99e Initial load
duke
parents:
diff changeset
1153 if (stack_size > 4 * K * K) stack_size = 4 * K * K;
a61af66fc99e Initial load
duke
parents:
diff changeset
1154 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
1155
a61af66fc99e Initial load
duke
parents:
diff changeset
1156 // Try to figure out where the stack base (top) is. This is harder.
a61af66fc99e Initial load
duke
parents:
diff changeset
1157 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1158 // When an application is started, glibc saves the initial stack pointer in
a61af66fc99e Initial load
duke
parents:
diff changeset
1159 // a global variable "__libc_stack_end", which is then used by system
a61af66fc99e Initial load
duke
parents:
diff changeset
1160 // libraries. __libc_stack_end should be pretty close to stack top. The
a61af66fc99e Initial load
duke
parents:
diff changeset
1161 // variable is available since the very early days. However, because it is
a61af66fc99e Initial load
duke
parents:
diff changeset
1162 // a private interface, it could disappear in the future.
a61af66fc99e Initial load
duke
parents:
diff changeset
1163 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1164 // Linux kernel saves start_stack information in /proc/<pid>/stat. Similar
a61af66fc99e Initial load
duke
parents:
diff changeset
1165 // to __libc_stack_end, it is very close to stack top, but isn't the real
a61af66fc99e Initial load
duke
parents:
diff changeset
1166 // stack top. Note that /proc may not exist if VM is running as a chroot
a61af66fc99e Initial load
duke
parents:
diff changeset
1167 // program, so reading /proc/<pid>/stat could fail. Also the contents of
a61af66fc99e Initial load
duke
parents:
diff changeset
1168 // /proc/<pid>/stat could change in the future (though unlikely).
a61af66fc99e Initial load
duke
parents:
diff changeset
1169 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1170 // We try __libc_stack_end first. If that doesn't work, look for
a61af66fc99e Initial load
duke
parents:
diff changeset
1171 // /proc/<pid>/stat. If neither of them works, we use current stack pointer
a61af66fc99e Initial load
duke
parents:
diff changeset
1172 // as a hint, which should work well in most cases.
a61af66fc99e Initial load
duke
parents:
diff changeset
1173
a61af66fc99e Initial load
duke
parents:
diff changeset
1174 uintptr_t stack_start;
a61af66fc99e Initial load
duke
parents:
diff changeset
1175
a61af66fc99e Initial load
duke
parents:
diff changeset
1176 // try __libc_stack_end first
a61af66fc99e Initial load
duke
parents:
diff changeset
1177 uintptr_t *p = (uintptr_t *)dlsym(RTLD_DEFAULT, "__libc_stack_end");
a61af66fc99e Initial load
duke
parents:
diff changeset
1178 if (p && *p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1179 stack_start = *p;
a61af66fc99e Initial load
duke
parents:
diff changeset
1180 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1181 // see if we can get the start_stack field from /proc/self/stat
a61af66fc99e Initial load
duke
parents:
diff changeset
1182 FILE *fp;
a61af66fc99e Initial load
duke
parents:
diff changeset
1183 int pid;
a61af66fc99e Initial load
duke
parents:
diff changeset
1184 char state;
a61af66fc99e Initial load
duke
parents:
diff changeset
1185 int ppid;
a61af66fc99e Initial load
duke
parents:
diff changeset
1186 int pgrp;
a61af66fc99e Initial load
duke
parents:
diff changeset
1187 int session;
a61af66fc99e Initial load
duke
parents:
diff changeset
1188 int nr;
a61af66fc99e Initial load
duke
parents:
diff changeset
1189 int tpgrp;
a61af66fc99e Initial load
duke
parents:
diff changeset
1190 unsigned long flags;
a61af66fc99e Initial load
duke
parents:
diff changeset
1191 unsigned long minflt;
a61af66fc99e Initial load
duke
parents:
diff changeset
1192 unsigned long cminflt;
a61af66fc99e Initial load
duke
parents:
diff changeset
1193 unsigned long majflt;
a61af66fc99e Initial load
duke
parents:
diff changeset
1194 unsigned long cmajflt;
a61af66fc99e Initial load
duke
parents:
diff changeset
1195 unsigned long utime;
a61af66fc99e Initial load
duke
parents:
diff changeset
1196 unsigned long stime;
a61af66fc99e Initial load
duke
parents:
diff changeset
1197 long cutime;
a61af66fc99e Initial load
duke
parents:
diff changeset
1198 long cstime;
a61af66fc99e Initial load
duke
parents:
diff changeset
1199 long prio;
a61af66fc99e Initial load
duke
parents:
diff changeset
1200 long nice;
a61af66fc99e Initial load
duke
parents:
diff changeset
1201 long junk;
a61af66fc99e Initial load
duke
parents:
diff changeset
1202 long it_real;
a61af66fc99e Initial load
duke
parents:
diff changeset
1203 uintptr_t start;
a61af66fc99e Initial load
duke
parents:
diff changeset
1204 uintptr_t vsize;
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1205 intptr_t rss;
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1206 uintptr_t rsslim;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1207 uintptr_t scodes;
a61af66fc99e Initial load
duke
parents:
diff changeset
1208 uintptr_t ecode;
a61af66fc99e Initial load
duke
parents:
diff changeset
1209 int i;
a61af66fc99e Initial load
duke
parents:
diff changeset
1210
a61af66fc99e Initial load
duke
parents:
diff changeset
1211 // Figure what the primordial thread stack base is. Code is inspired
a61af66fc99e Initial load
duke
parents:
diff changeset
1212 // by email from Hans Boehm. /proc/self/stat begins with current pid,
a61af66fc99e Initial load
duke
parents:
diff changeset
1213 // followed by command name surrounded by parentheses, state, etc.
a61af66fc99e Initial load
duke
parents:
diff changeset
1214 char stat[2048];
a61af66fc99e Initial load
duke
parents:
diff changeset
1215 int statlen;
a61af66fc99e Initial load
duke
parents:
diff changeset
1216
a61af66fc99e Initial load
duke
parents:
diff changeset
1217 fp = fopen("/proc/self/stat", "r");
a61af66fc99e Initial load
duke
parents:
diff changeset
1218 if (fp) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1219 statlen = fread(stat, 1, 2047, fp);
a61af66fc99e Initial load
duke
parents:
diff changeset
1220 stat[statlen] = '\0';
a61af66fc99e Initial load
duke
parents:
diff changeset
1221 fclose(fp);
a61af66fc99e Initial load
duke
parents:
diff changeset
1222
a61af66fc99e Initial load
duke
parents:
diff changeset
1223 // Skip pid and the command string. Note that we could be dealing with
a61af66fc99e Initial load
duke
parents:
diff changeset
1224 // weird command names, e.g. user could decide to rename java launcher
a61af66fc99e Initial load
duke
parents:
diff changeset
1225 // to "java 1.4.2 :)", then the stat file would look like
a61af66fc99e Initial load
duke
parents:
diff changeset
1226 // 1234 (java 1.4.2 :)) R ... ...
a61af66fc99e Initial load
duke
parents:
diff changeset
1227 // We don't really need to know the command string, just find the last
a61af66fc99e Initial load
duke
parents:
diff changeset
1228 // occurrence of ")" and then start parsing from there. See bug 4726580.
a61af66fc99e Initial load
duke
parents:
diff changeset
1229 char * s = strrchr(stat, ')');
a61af66fc99e Initial load
duke
parents:
diff changeset
1230
a61af66fc99e Initial load
duke
parents:
diff changeset
1231 i = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
1232 if (s) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1233 // Skip blank chars
a61af66fc99e Initial load
duke
parents:
diff changeset
1234 do s++; while (isspace(*s));
a61af66fc99e Initial load
duke
parents:
diff changeset
1235
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1236 #define _UFM UINTX_FORMAT
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1237 #define _DFM INTX_FORMAT
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1238
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1239 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 */
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1240 /* 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 */
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1241 i = sscanf(s, "%c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld " _UFM _UFM _DFM _UFM _UFM _UFM _UFM,
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1242 &state, /* 3 %c */
a61af66fc99e Initial load
duke
parents:
diff changeset
1243 &ppid, /* 4 %d */
a61af66fc99e Initial load
duke
parents:
diff changeset
1244 &pgrp, /* 5 %d */
a61af66fc99e Initial load
duke
parents:
diff changeset
1245 &session, /* 6 %d */
a61af66fc99e Initial load
duke
parents:
diff changeset
1246 &nr, /* 7 %d */
a61af66fc99e Initial load
duke
parents:
diff changeset
1247 &tpgrp, /* 8 %d */
a61af66fc99e Initial load
duke
parents:
diff changeset
1248 &flags, /* 9 %lu */
a61af66fc99e Initial load
duke
parents:
diff changeset
1249 &minflt, /* 10 %lu */
a61af66fc99e Initial load
duke
parents:
diff changeset
1250 &cminflt, /* 11 %lu */
a61af66fc99e Initial load
duke
parents:
diff changeset
1251 &majflt, /* 12 %lu */
a61af66fc99e Initial load
duke
parents:
diff changeset
1252 &cmajflt, /* 13 %lu */
a61af66fc99e Initial load
duke
parents:
diff changeset
1253 &utime, /* 14 %lu */
a61af66fc99e Initial load
duke
parents:
diff changeset
1254 &stime, /* 15 %lu */
a61af66fc99e Initial load
duke
parents:
diff changeset
1255 &cutime, /* 16 %ld */
a61af66fc99e Initial load
duke
parents:
diff changeset
1256 &cstime, /* 17 %ld */
a61af66fc99e Initial load
duke
parents:
diff changeset
1257 &prio, /* 18 %ld */
a61af66fc99e Initial load
duke
parents:
diff changeset
1258 &nice, /* 19 %ld */
a61af66fc99e Initial load
duke
parents:
diff changeset
1259 &junk, /* 20 %ld */
a61af66fc99e Initial load
duke
parents:
diff changeset
1260 &it_real, /* 21 %ld */
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1261 &start, /* 22 UINTX_FORMAT */
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1262 &vsize, /* 23 UINTX_FORMAT */
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1263 &rss, /* 24 INTX_FORMAT */
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1264 &rsslim, /* 25 UINTX_FORMAT */
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1265 &scodes, /* 26 UINTX_FORMAT */
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1266 &ecode, /* 27 UINTX_FORMAT */
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1267 &stack_start); /* 28 UINTX_FORMAT */
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1268 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1269
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1270 #undef _UFM
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1271 #undef _DFM
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1272
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1273 if (i != 28 - 2) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1274 assert(false, "Bad conversion from /proc/self/stat");
a61af66fc99e Initial load
duke
parents:
diff changeset
1275 // product mode - assume we are the initial thread, good luck in the
a61af66fc99e Initial load
duke
parents:
diff changeset
1276 // embedded case.
a61af66fc99e Initial load
duke
parents:
diff changeset
1277 warning("Can't detect initial thread stack location - bad conversion");
a61af66fc99e Initial load
duke
parents:
diff changeset
1278 stack_start = (uintptr_t) &rlim;
a61af66fc99e Initial load
duke
parents:
diff changeset
1279 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1280 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1281 // For some reason we can't open /proc/self/stat (for example, running on
a61af66fc99e Initial load
duke
parents:
diff changeset
1282 // FreeBSD with a Linux emulator, or inside chroot), this should work for
a61af66fc99e Initial load
duke
parents:
diff changeset
1283 // most cases, so don't abort:
a61af66fc99e Initial load
duke
parents:
diff changeset
1284 warning("Can't detect initial thread stack location - no /proc/self/stat");
a61af66fc99e Initial load
duke
parents:
diff changeset
1285 stack_start = (uintptr_t) &rlim;
a61af66fc99e Initial load
duke
parents:
diff changeset
1286 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1287 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1288
a61af66fc99e Initial load
duke
parents:
diff changeset
1289 // Now we have a pointer (stack_start) very close to the stack top, the
a61af66fc99e Initial load
duke
parents:
diff changeset
1290 // next thing to do is to figure out the exact location of stack top. We
a61af66fc99e Initial load
duke
parents:
diff changeset
1291 // can find out the virtual memory area that contains stack_start by
a61af66fc99e Initial load
duke
parents:
diff changeset
1292 // reading /proc/self/maps, it should be the last vma in /proc/self/maps,
a61af66fc99e Initial load
duke
parents:
diff changeset
1293 // and its upper limit is the real stack top. (again, this would fail if
a61af66fc99e Initial load
duke
parents:
diff changeset
1294 // running inside chroot, because /proc may not exist.)
a61af66fc99e Initial load
duke
parents:
diff changeset
1295
a61af66fc99e Initial load
duke
parents:
diff changeset
1296 uintptr_t stack_top;
a61af66fc99e Initial load
duke
parents:
diff changeset
1297 address low, high;
a61af66fc99e Initial load
duke
parents:
diff changeset
1298 if (find_vma((address)stack_start, &low, &high)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1299 // success, "high" is the true stack top. (ignore "low", because initial
a61af66fc99e Initial load
duke
parents:
diff changeset
1300 // thread stack grows on demand, its real bottom is high - RLIMIT_STACK.)
a61af66fc99e Initial load
duke
parents:
diff changeset
1301 stack_top = (uintptr_t)high;
a61af66fc99e Initial load
duke
parents:
diff changeset
1302 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1303 // failed, likely because /proc/self/maps does not exist
a61af66fc99e Initial load
duke
parents:
diff changeset
1304 warning("Can't detect initial thread stack location - find_vma failed");
a61af66fc99e Initial load
duke
parents:
diff changeset
1305 // best effort: stack_start is normally within a few pages below the real
a61af66fc99e Initial load
duke
parents:
diff changeset
1306 // stack top, use it as stack top, and reduce stack size so we won't put
a61af66fc99e Initial load
duke
parents:
diff changeset
1307 // guard page outside stack.
a61af66fc99e Initial load
duke
parents:
diff changeset
1308 stack_top = stack_start;
a61af66fc99e Initial load
duke
parents:
diff changeset
1309 stack_size -= 16 * page_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
1310 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1311
a61af66fc99e Initial load
duke
parents:
diff changeset
1312 // stack_top could be partially down the page so align it
a61af66fc99e Initial load
duke
parents:
diff changeset
1313 stack_top = align_size_up(stack_top, page_size());
a61af66fc99e Initial load
duke
parents:
diff changeset
1314
a61af66fc99e Initial load
duke
parents:
diff changeset
1315 if (max_size && stack_size > max_size) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1316 _initial_thread_stack_size = max_size;
a61af66fc99e Initial load
duke
parents:
diff changeset
1317 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1318 _initial_thread_stack_size = stack_size;
a61af66fc99e Initial load
duke
parents:
diff changeset
1319 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1320
a61af66fc99e Initial load
duke
parents:
diff changeset
1321 _initial_thread_stack_size = align_size_down(_initial_thread_stack_size, page_size());
a61af66fc99e Initial load
duke
parents:
diff changeset
1322 _initial_thread_stack_bottom = (address)stack_top - _initial_thread_stack_size;
a61af66fc99e Initial load
duke
parents:
diff changeset
1323 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1324
a61af66fc99e Initial load
duke
parents:
diff changeset
1325 ////////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
1326 // time support
a61af66fc99e Initial load
duke
parents:
diff changeset
1327
a61af66fc99e Initial load
duke
parents:
diff changeset
1328 // Time since start-up in seconds to a fine granularity.
a61af66fc99e Initial load
duke
parents:
diff changeset
1329 // Used by VMSelfDestructTimer and the MemProfiler.
a61af66fc99e Initial load
duke
parents:
diff changeset
1330 double os::elapsedTime() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1331
a61af66fc99e Initial load
duke
parents:
diff changeset
1332 return (double)(os::elapsed_counter()) * 0.000001;
a61af66fc99e Initial load
duke
parents:
diff changeset
1333 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1334
a61af66fc99e Initial load
duke
parents:
diff changeset
1335 jlong os::elapsed_counter() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1336 timeval time;
a61af66fc99e Initial load
duke
parents:
diff changeset
1337 int status = gettimeofday(&time, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1338 return jlong(time.tv_sec) * 1000 * 1000 + jlong(time.tv_usec) - initial_time_count;
a61af66fc99e Initial load
duke
parents:
diff changeset
1339 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1340
a61af66fc99e Initial load
duke
parents:
diff changeset
1341 jlong os::elapsed_frequency() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1342 return (1000 * 1000);
a61af66fc99e Initial load
duke
parents:
diff changeset
1343 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1344
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 141
diff changeset
1345 // For now, we say that linux does not support vtime. I have no idea
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 141
diff changeset
1346 // whether it can actually be made to (DLD, 9/13/05).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 141
diff changeset
1347
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 141
diff changeset
1348 bool os::supports_vtime() { return false; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 141
diff changeset
1349 bool os::enable_vtime() { return false; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 141
diff changeset
1350 bool os::vtime_enabled() { return false; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 141
diff changeset
1351 double os::elapsedVTime() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 141
diff changeset
1352 // better than nothing, but not much
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 141
diff changeset
1353 return elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 141
diff changeset
1354 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 141
diff changeset
1355
61
5a76ab815e34 6667833: Remove CacheTimeMillis
sbohne
parents: 0
diff changeset
1356 jlong os::javaTimeMillis() {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1357 timeval time;
a61af66fc99e Initial load
duke
parents:
diff changeset
1358 int status = gettimeofday(&time, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1359 assert(status != -1, "linux error");
a61af66fc99e Initial load
duke
parents:
diff changeset
1360 return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000);
a61af66fc99e Initial load
duke
parents:
diff changeset
1361 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1362
a61af66fc99e Initial load
duke
parents:
diff changeset
1363 #ifndef CLOCK_MONOTONIC
a61af66fc99e Initial load
duke
parents:
diff changeset
1364 #define CLOCK_MONOTONIC (1)
a61af66fc99e Initial load
duke
parents:
diff changeset
1365 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
1366
a61af66fc99e Initial load
duke
parents:
diff changeset
1367 void os::Linux::clock_init() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1368 // we do dlopen's in this particular order due to bug in linux
a61af66fc99e Initial load
duke
parents:
diff changeset
1369 // dynamical loader (see 6348968) leading to crash on exit
a61af66fc99e Initial load
duke
parents:
diff changeset
1370 void* handle = dlopen("librt.so.1", RTLD_LAZY);
a61af66fc99e Initial load
duke
parents:
diff changeset
1371 if (handle == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1372 handle = dlopen("librt.so", RTLD_LAZY);
a61af66fc99e Initial load
duke
parents:
diff changeset
1373 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1374
a61af66fc99e Initial load
duke
parents:
diff changeset
1375 if (handle) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1376 int (*clock_getres_func)(clockid_t, struct timespec*) =
a61af66fc99e Initial load
duke
parents:
diff changeset
1377 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_getres");
a61af66fc99e Initial load
duke
parents:
diff changeset
1378 int (*clock_gettime_func)(clockid_t, struct timespec*) =
a61af66fc99e Initial load
duke
parents:
diff changeset
1379 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_gettime");
a61af66fc99e Initial load
duke
parents:
diff changeset
1380 if (clock_getres_func && clock_gettime_func) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1381 // See if monotonic clock is supported by the kernel. Note that some
a61af66fc99e Initial load
duke
parents:
diff changeset
1382 // early implementations simply return kernel jiffies (updated every
a61af66fc99e Initial load
duke
parents:
diff changeset
1383 // 1/100 or 1/1000 second). It would be bad to use such a low res clock
a61af66fc99e Initial load
duke
parents:
diff changeset
1384 // for nano time (though the monotonic property is still nice to have).
a61af66fc99e Initial load
duke
parents:
diff changeset
1385 // It's fixed in newer kernels, however clock_getres() still returns
a61af66fc99e Initial load
duke
parents:
diff changeset
1386 // 1/HZ. We check if clock_getres() works, but will ignore its reported
a61af66fc99e Initial load
duke
parents:
diff changeset
1387 // resolution for now. Hopefully as people move to new kernels, this
a61af66fc99e Initial load
duke
parents:
diff changeset
1388 // won't be a problem.
a61af66fc99e Initial load
duke
parents:
diff changeset
1389 struct timespec res;
a61af66fc99e Initial load
duke
parents:
diff changeset
1390 struct timespec tp;
a61af66fc99e Initial load
duke
parents:
diff changeset
1391 if (clock_getres_func (CLOCK_MONOTONIC, &res) == 0 &&
a61af66fc99e Initial load
duke
parents:
diff changeset
1392 clock_gettime_func(CLOCK_MONOTONIC, &tp) == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1393 // yes, monotonic clock is supported
a61af66fc99e Initial load
duke
parents:
diff changeset
1394 _clock_gettime = clock_gettime_func;
a61af66fc99e Initial load
duke
parents:
diff changeset
1395 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1396 // close librt if there is no monotonic clock
a61af66fc99e Initial load
duke
parents:
diff changeset
1397 dlclose(handle);
a61af66fc99e Initial load
duke
parents:
diff changeset
1398 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1399 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1400 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1401 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1402
a61af66fc99e Initial load
duke
parents:
diff changeset
1403 #ifndef SYS_clock_getres
a61af66fc99e Initial load
duke
parents:
diff changeset
1404
a61af66fc99e Initial load
duke
parents:
diff changeset
1405 #if defined(IA32) || defined(AMD64)
a61af66fc99e Initial load
duke
parents:
diff changeset
1406 #define SYS_clock_getres IA32_ONLY(266) AMD64_ONLY(229)
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1407 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y)
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1408 #else
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1409 #warning "SYS_clock_getres not defined for this platform, disabling fast_thread_cpu_time"
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1410 #define sys_clock_getres(x,y) -1
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1411 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
1412
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1413 #else
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
1414 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y)
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1415 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
1416
a61af66fc99e Initial load
duke
parents:
diff changeset
1417 void os::Linux::fast_thread_clock_init() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1418 if (!UseLinuxPosixThreadCPUClocks) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1419 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
1420 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1421 clockid_t clockid;
a61af66fc99e Initial load
duke
parents:
diff changeset
1422 struct timespec tp;
a61af66fc99e Initial load
duke
parents:
diff changeset
1423 int (*pthread_getcpuclockid_func)(pthread_t, clockid_t *) =
a61af66fc99e Initial load
duke
parents:
diff changeset
1424 (int(*)(pthread_t, clockid_t *)) dlsym(RTLD_DEFAULT, "pthread_getcpuclockid");
a61af66fc99e Initial load
duke
parents:
diff changeset
1425
a61af66fc99e Initial load
duke
parents:
diff changeset
1426 // Switch to using fast clocks for thread cpu time if
a61af66fc99e Initial load
duke
parents:
diff changeset
1427 // the sys_clock_getres() returns 0 error code.
a61af66fc99e Initial load
duke
parents:
diff changeset
1428 // Note, that some kernels may support the current thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1429 // clock (CLOCK_THREAD_CPUTIME_ID) but not the clocks
a61af66fc99e Initial load
duke
parents:
diff changeset
1430 // returned by the pthread_getcpuclockid().
a61af66fc99e Initial load
duke
parents:
diff changeset
1431 // If the fast Posix clocks are supported then the sys_clock_getres()
a61af66fc99e Initial load
duke
parents:
diff changeset
1432 // must return at least tp.tv_sec == 0 which means a resolution
a61af66fc99e Initial load
duke
parents:
diff changeset
1433 // better than 1 sec. This is extra check for reliability.
a61af66fc99e Initial load
duke
parents:
diff changeset
1434
a61af66fc99e Initial load
duke
parents:
diff changeset
1435 if(pthread_getcpuclockid_func &&
a61af66fc99e Initial load
duke
parents:
diff changeset
1436 pthread_getcpuclockid_func(_main_thread, &clockid) == 0 &&
a61af66fc99e Initial load
duke
parents:
diff changeset
1437 sys_clock_getres(clockid, &tp) == 0 && tp.tv_sec == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1438
a61af66fc99e Initial load
duke
parents:
diff changeset
1439 _supports_fast_thread_cpu_time = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1440 _pthread_getcpuclockid = pthread_getcpuclockid_func;
a61af66fc99e Initial load
duke
parents:
diff changeset
1441 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1442 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1443
a61af66fc99e Initial load
duke
parents:
diff changeset
1444 jlong os::javaTimeNanos() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1445 if (Linux::supports_monotonic_clock()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1446 struct timespec tp;
a61af66fc99e Initial load
duke
parents:
diff changeset
1447 int status = Linux::clock_gettime(CLOCK_MONOTONIC, &tp);
a61af66fc99e Initial load
duke
parents:
diff changeset
1448 assert(status == 0, "gettime error");
a61af66fc99e Initial load
duke
parents:
diff changeset
1449 jlong result = jlong(tp.tv_sec) * (1000 * 1000 * 1000) + jlong(tp.tv_nsec);
a61af66fc99e Initial load
duke
parents:
diff changeset
1450 return result;
a61af66fc99e Initial load
duke
parents:
diff changeset
1451 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1452 timeval time;
a61af66fc99e Initial load
duke
parents:
diff changeset
1453 int status = gettimeofday(&time, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1454 assert(status != -1, "linux error");
a61af66fc99e Initial load
duke
parents:
diff changeset
1455 jlong usecs = jlong(time.tv_sec) * (1000 * 1000) + jlong(time.tv_usec);
a61af66fc99e Initial load
duke
parents:
diff changeset
1456 return 1000 * usecs;
a61af66fc99e Initial load
duke
parents:
diff changeset
1457 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1458 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1459
a61af66fc99e Initial load
duke
parents:
diff changeset
1460 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1461 if (Linux::supports_monotonic_clock()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1462 info_ptr->max_value = ALL_64_BITS;
a61af66fc99e Initial load
duke
parents:
diff changeset
1463
a61af66fc99e Initial load
duke
parents:
diff changeset
1464 // CLOCK_MONOTONIC - amount of time since some arbitrary point in the past
a61af66fc99e Initial load
duke
parents:
diff changeset
1465 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
a61af66fc99e Initial load
duke
parents:
diff changeset
1466 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
a61af66fc99e Initial load
duke
parents:
diff changeset
1467 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1468 // gettimeofday - based on time in seconds since the Epoch thus does not wrap
a61af66fc99e Initial load
duke
parents:
diff changeset
1469 info_ptr->max_value = ALL_64_BITS;
a61af66fc99e Initial load
duke
parents:
diff changeset
1470
a61af66fc99e Initial load
duke
parents:
diff changeset
1471 // gettimeofday is a real time clock so it skips
a61af66fc99e Initial load
duke
parents:
diff changeset
1472 info_ptr->may_skip_backward = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1473 info_ptr->may_skip_forward = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1474 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1475
a61af66fc99e Initial load
duke
parents:
diff changeset
1476 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
a61af66fc99e Initial load
duke
parents:
diff changeset
1477 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1478
a61af66fc99e Initial load
duke
parents:
diff changeset
1479 // Return the real, user, and system times in seconds from an
a61af66fc99e Initial load
duke
parents:
diff changeset
1480 // arbitrary fixed point in the past.
a61af66fc99e Initial load
duke
parents:
diff changeset
1481 bool os::getTimesSecs(double* process_real_time,
a61af66fc99e Initial load
duke
parents:
diff changeset
1482 double* process_user_time,
a61af66fc99e Initial load
duke
parents:
diff changeset
1483 double* process_system_time) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1484 struct tms ticks;
a61af66fc99e Initial load
duke
parents:
diff changeset
1485 clock_t real_ticks = times(&ticks);
a61af66fc99e Initial load
duke
parents:
diff changeset
1486
a61af66fc99e Initial load
duke
parents:
diff changeset
1487 if (real_ticks == (clock_t) (-1)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1488 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1489 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1490 double ticks_per_second = (double) clock_tics_per_sec;
a61af66fc99e Initial load
duke
parents:
diff changeset
1491 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
a61af66fc99e Initial load
duke
parents:
diff changeset
1492 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
a61af66fc99e Initial load
duke
parents:
diff changeset
1493 *process_real_time = ((double) real_ticks) / ticks_per_second;
a61af66fc99e Initial load
duke
parents:
diff changeset
1494
a61af66fc99e Initial load
duke
parents:
diff changeset
1495 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1496 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1497 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1498
a61af66fc99e Initial load
duke
parents:
diff changeset
1499
a61af66fc99e Initial load
duke
parents:
diff changeset
1500 char * os::local_time_string(char *buf, size_t buflen) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1501 struct tm t;
a61af66fc99e Initial load
duke
parents:
diff changeset
1502 time_t long_time;
a61af66fc99e Initial load
duke
parents:
diff changeset
1503 time(&long_time);
a61af66fc99e Initial load
duke
parents:
diff changeset
1504 localtime_r(&long_time, &t);
a61af66fc99e Initial load
duke
parents:
diff changeset
1505 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
a61af66fc99e Initial load
duke
parents:
diff changeset
1506 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
a61af66fc99e Initial load
duke
parents:
diff changeset
1507 t.tm_hour, t.tm_min, t.tm_sec);
a61af66fc99e Initial load
duke
parents:
diff changeset
1508 return buf;
a61af66fc99e Initial load
duke
parents:
diff changeset
1509 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1510
548
773234c55e8c 6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents: 516
diff changeset
1511 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
773234c55e8c 6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents: 516
diff changeset
1512 return localtime_r(clock, res);
773234c55e8c 6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents: 516
diff changeset
1513 }
773234c55e8c 6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents: 516
diff changeset
1514
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1515 ////////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
1516 // runtime exit support
a61af66fc99e Initial load
duke
parents:
diff changeset
1517
a61af66fc99e Initial load
duke
parents:
diff changeset
1518 // Note: os::shutdown() might be called very early during initialization, or
a61af66fc99e Initial load
duke
parents:
diff changeset
1519 // called from signal handler. Before adding something to os::shutdown(), make
a61af66fc99e Initial load
duke
parents:
diff changeset
1520 // sure it is async-safe and can handle partially initialized VM.
a61af66fc99e Initial load
duke
parents:
diff changeset
1521 void os::shutdown() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1522
a61af66fc99e Initial load
duke
parents:
diff changeset
1523 // allow PerfMemory to attempt cleanup of any persistent resources
a61af66fc99e Initial load
duke
parents:
diff changeset
1524 perfMemory_exit();
a61af66fc99e Initial load
duke
parents:
diff changeset
1525
a61af66fc99e Initial load
duke
parents:
diff changeset
1526 // needs to remove object in file system
a61af66fc99e Initial load
duke
parents:
diff changeset
1527 AttachListener::abort();
a61af66fc99e Initial load
duke
parents:
diff changeset
1528
a61af66fc99e Initial load
duke
parents:
diff changeset
1529 // flush buffered output, finish log files
a61af66fc99e Initial load
duke
parents:
diff changeset
1530 ostream_abort();
a61af66fc99e Initial load
duke
parents:
diff changeset
1531
a61af66fc99e Initial load
duke
parents:
diff changeset
1532 // Check for abort hook
a61af66fc99e Initial load
duke
parents:
diff changeset
1533 abort_hook_t abort_hook = Arguments::abort_hook();
a61af66fc99e Initial load
duke
parents:
diff changeset
1534 if (abort_hook != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1535 abort_hook();
a61af66fc99e Initial load
duke
parents:
diff changeset
1536 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1537
a61af66fc99e Initial load
duke
parents:
diff changeset
1538 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1539
a61af66fc99e Initial load
duke
parents:
diff changeset
1540 // Note: os::abort() might be called very early during initialization, or
a61af66fc99e Initial load
duke
parents:
diff changeset
1541 // called from signal handler. Before adding something to os::abort(), make
a61af66fc99e Initial load
duke
parents:
diff changeset
1542 // sure it is async-safe and can handle partially initialized VM.
a61af66fc99e Initial load
duke
parents:
diff changeset
1543 void os::abort(bool dump_core) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1544 os::shutdown();
a61af66fc99e Initial load
duke
parents:
diff changeset
1545 if (dump_core) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1546 #ifndef PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
1547 fdStream out(defaultStream::output_fd());
a61af66fc99e Initial load
duke
parents:
diff changeset
1548 out.print_raw("Current thread is ");
a61af66fc99e Initial load
duke
parents:
diff changeset
1549 char buf[16];
a61af66fc99e Initial load
duke
parents:
diff changeset
1550 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
a61af66fc99e Initial load
duke
parents:
diff changeset
1551 out.print_raw_cr(buf);
a61af66fc99e Initial load
duke
parents:
diff changeset
1552 out.print_raw_cr("Dumping core ...");
a61af66fc99e Initial load
duke
parents:
diff changeset
1553 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
1554 ::abort(); // dump core
a61af66fc99e Initial load
duke
parents:
diff changeset
1555 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1556
a61af66fc99e Initial load
duke
parents:
diff changeset
1557 ::exit(1);
a61af66fc99e Initial load
duke
parents:
diff changeset
1558 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1559
a61af66fc99e Initial load
duke
parents:
diff changeset
1560 // Die immediately, no exit hook, no abort hook, no cleanup.
a61af66fc99e Initial load
duke
parents:
diff changeset
1561 void os::die() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1562 // _exit() on LinuxThreads only kills current thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1563 ::abort();
a61af66fc99e Initial load
duke
parents:
diff changeset
1564 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1565
a61af66fc99e Initial load
duke
parents:
diff changeset
1566 // unused on linux for now.
a61af66fc99e Initial load
duke
parents:
diff changeset
1567 void os::set_error_file(const char *logfile) {}
a61af66fc99e Initial load
duke
parents:
diff changeset
1568
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1569
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1570 // This method is a copy of JDK's sysGetLastErrorString
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1571 // from src/solaris/hpi/src/system_md.c
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1572
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1573 size_t os::lasterror(char *buf, size_t len) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1574
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1575 if (errno == 0) return 0;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1576
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1577 const char *s = ::strerror(errno);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1578 size_t n = ::strlen(s);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1579 if (n >= len) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1580 n = len - 1;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1581 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1582 ::strncpy(buf, s, n);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1583 buf[n] = '\0';
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1584 return n;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1585 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1586
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1587 intx os::current_thread_id() { return (intx)pthread_self(); }
a61af66fc99e Initial load
duke
parents:
diff changeset
1588 int os::current_process_id() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1589
a61af66fc99e Initial load
duke
parents:
diff changeset
1590 // Under the old linux thread library, linux gives each thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1591 // its own process id. Because of this each thread will return
a61af66fc99e Initial load
duke
parents:
diff changeset
1592 // a different pid if this method were to return the result
a61af66fc99e Initial load
duke
parents:
diff changeset
1593 // of getpid(2). Linux provides no api that returns the pid
a61af66fc99e Initial load
duke
parents:
diff changeset
1594 // of the launcher thread for the vm. This implementation
a61af66fc99e Initial load
duke
parents:
diff changeset
1595 // returns a unique pid, the pid of the launcher thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1596 // that starts the vm 'process'.
a61af66fc99e Initial load
duke
parents:
diff changeset
1597
a61af66fc99e Initial load
duke
parents:
diff changeset
1598 // Under the NPTL, getpid() returns the same pid as the
a61af66fc99e Initial load
duke
parents:
diff changeset
1599 // launcher thread rather than a unique pid per thread.
a61af66fc99e Initial load
duke
parents:
diff changeset
1600 // Use gettid() if you want the old pre NPTL behaviour.
a61af66fc99e Initial load
duke
parents:
diff changeset
1601
a61af66fc99e Initial load
duke
parents:
diff changeset
1602 // if you are looking for the result of a call to getpid() that
a61af66fc99e Initial load
duke
parents:
diff changeset
1603 // returns a unique pid for the calling thread, then look at the
a61af66fc99e Initial load
duke
parents:
diff changeset
1604 // OSThread::thread_id() method in osThread_linux.hpp file
a61af66fc99e Initial load
duke
parents:
diff changeset
1605
a61af66fc99e Initial load
duke
parents:
diff changeset
1606 return (int)(_initial_pid ? _initial_pid : getpid());
a61af66fc99e Initial load
duke
parents:
diff changeset
1607 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1608
a61af66fc99e Initial load
duke
parents:
diff changeset
1609 // DLL functions
a61af66fc99e Initial load
duke
parents:
diff changeset
1610
a61af66fc99e Initial load
duke
parents:
diff changeset
1611 const char* os::dll_file_extension() { return ".so"; }
a61af66fc99e Initial load
duke
parents:
diff changeset
1612
2130
34d64ad817f4 7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
parents: 2033
diff changeset
1613 // This must be hard coded because it's the system's temporary
34d64ad817f4 7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
parents: 2033
diff changeset
1614 // directory not the java application's temp directory, ala java.io.tmpdir.
34d64ad817f4 7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
parents: 2033
diff changeset
1615 const char* os::get_temp_directory() { return "/tmp"; }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1616
691
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1617 static bool file_exists(const char* filename) {
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1618 struct stat statbuf;
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1619 if (filename == NULL || strlen(filename) == 0) {
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1620 return false;
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1621 }
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1622 return os::stat(filename, &statbuf) == 0;
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1623 }
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1624
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1625 void os::dll_build_name(char* buffer, size_t buflen,
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1626 const char* pname, const char* fname) {
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1627 // Copied from libhpi
242
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1628 const size_t pnamelen = pname ? strlen(pname) : 0;
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1629
691
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1630 // Quietly truncate on buffer overflow. Should be an error.
242
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1631 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1632 *buffer = '\0';
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1633 return;
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1634 }
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1635
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1636 if (pnamelen == 0) {
691
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1637 snprintf(buffer, buflen, "lib%s.so", fname);
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1638 } else if (strchr(pname, *os::path_separator()) != NULL) {
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1639 int n;
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1640 char** pelements = split_path(pname, &n);
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1641 for (int i = 0 ; i < n ; i++) {
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1642 // Really shouldn't be NULL, but check can't hurt
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1643 if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1644 continue; // skip the empty path values
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1645 }
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1646 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1647 if (file_exists(buffer)) {
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1648 break;
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1649 }
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1650 }
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1651 // release the storage
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1652 for (int i = 0 ; i < n ; i++) {
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1653 if (pelements[i] != NULL) {
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1654 FREE_C_HEAP_ARRAY(char, pelements[i]);
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1655 }
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1656 }
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1657 if (pelements != NULL) {
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1658 FREE_C_HEAP_ARRAY(char*, pelements);
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1659 }
242
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1660 } else {
691
956304450e80 6819213: revive sun.boot.library.path
phh
parents: 656
diff changeset
1661 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
242
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1662 }
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1663 }
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1664
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1665 const char* os::get_current_directory(char *buf, int buflen) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1666 return getcwd(buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
1667 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1668
a61af66fc99e Initial load
duke
parents:
diff changeset
1669 // check if addr is inside libjvm[_g].so
a61af66fc99e Initial load
duke
parents:
diff changeset
1670 bool os::address_is_in_vm(address addr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1671 static address libjvm_base_addr;
a61af66fc99e Initial load
duke
parents:
diff changeset
1672 Dl_info dlinfo;
a61af66fc99e Initial load
duke
parents:
diff changeset
1673
a61af66fc99e Initial load
duke
parents:
diff changeset
1674 if (libjvm_base_addr == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1675 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo);
a61af66fc99e Initial load
duke
parents:
diff changeset
1676 libjvm_base_addr = (address)dlinfo.dli_fbase;
a61af66fc99e Initial load
duke
parents:
diff changeset
1677 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
a61af66fc99e Initial load
duke
parents:
diff changeset
1678 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1679
a61af66fc99e Initial load
duke
parents:
diff changeset
1680 if (dladdr((void *)addr, &dlinfo)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1681 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1682 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1683
a61af66fc99e Initial load
duke
parents:
diff changeset
1684 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1685 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1686
a61af66fc99e Initial load
duke
parents:
diff changeset
1687 bool os::dll_address_to_function_name(address addr, char *buf,
a61af66fc99e Initial load
duke
parents:
diff changeset
1688 int buflen, int *offset) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1689 Dl_info dlinfo;
a61af66fc99e Initial load
duke
parents:
diff changeset
1690
a61af66fc99e Initial load
duke
parents:
diff changeset
1691 if (dladdr((void*)addr, &dlinfo) && dlinfo.dli_sname != NULL) {
2022
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1692 if (buf != NULL) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1693 if(!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1694 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1695 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1696 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1697 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1698 return true;
2022
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1699 } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1700 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1701 dlinfo.dli_fname, buf, buflen, offset) == Decoder::no_error) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1702 return true;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1703 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1704 }
2022
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1705
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1706 if (buf != NULL) buf[0] = '\0';
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1707 if (offset != NULL) *offset = -1;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents: 1972
diff changeset
1708 return false;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1709 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1710
a61af66fc99e Initial load
duke
parents:
diff changeset
1711 struct _address_to_library_name {
a61af66fc99e Initial load
duke
parents:
diff changeset
1712 address addr; // input : memory address
a61af66fc99e Initial load
duke
parents:
diff changeset
1713 size_t buflen; // size of fname
a61af66fc99e Initial load
duke
parents:
diff changeset
1714 char* fname; // output: library name
a61af66fc99e Initial load
duke
parents:
diff changeset
1715 address base; // library base addr
a61af66fc99e Initial load
duke
parents:
diff changeset
1716 };
a61af66fc99e Initial load
duke
parents:
diff changeset
1717
a61af66fc99e Initial load
duke
parents:
diff changeset
1718 static int address_to_library_name_callback(struct dl_phdr_info *info,
a61af66fc99e Initial load
duke
parents:
diff changeset
1719 size_t size, void *data) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1720 int i;
a61af66fc99e Initial load
duke
parents:
diff changeset
1721 bool found = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1722 address libbase = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1723 struct _address_to_library_name * d = (struct _address_to_library_name *)data;
a61af66fc99e Initial load
duke
parents:
diff changeset
1724
a61af66fc99e Initial load
duke
parents:
diff changeset
1725 // iterate through all loadable segments
a61af66fc99e Initial load
duke
parents:
diff changeset
1726 for (i = 0; i < info->dlpi_phnum; i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1727 address segbase = (address)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
a61af66fc99e Initial load
duke
parents:
diff changeset
1728 if (info->dlpi_phdr[i].p_type == PT_LOAD) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1729 // base address of a library is the lowest address of its loaded
a61af66fc99e Initial load
duke
parents:
diff changeset
1730 // segments.
a61af66fc99e Initial load
duke
parents:
diff changeset
1731 if (libbase == NULL || libbase > segbase) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1732 libbase = segbase;
a61af66fc99e Initial load
duke
parents:
diff changeset
1733 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1734 // see if 'addr' is within current segment
a61af66fc99e Initial load
duke
parents:
diff changeset
1735 if (segbase <= d->addr &&
a61af66fc99e Initial load
duke
parents:
diff changeset
1736 d->addr < segbase + info->dlpi_phdr[i].p_memsz) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1737 found = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1738 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1739 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1740 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1741
a61af66fc99e Initial load
duke
parents:
diff changeset
1742 // dlpi_name is NULL or empty if the ELF file is executable, return 0
a61af66fc99e Initial load
duke
parents:
diff changeset
1743 // so dll_address_to_library_name() can fall through to use dladdr() which
a61af66fc99e Initial load
duke
parents:
diff changeset
1744 // can figure out executable name from argv[0].
a61af66fc99e Initial load
duke
parents:
diff changeset
1745 if (found && info->dlpi_name && info->dlpi_name[0]) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1746 d->base = libbase;
a61af66fc99e Initial load
duke
parents:
diff changeset
1747 if (d->fname) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1748 jio_snprintf(d->fname, d->buflen, "%s", info->dlpi_name);
a61af66fc99e Initial load
duke
parents:
diff changeset
1749 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1750 return 1;
a61af66fc99e Initial load
duke
parents:
diff changeset
1751 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1752 return 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
1753 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1754
a61af66fc99e Initial load
duke
parents:
diff changeset
1755 bool os::dll_address_to_library_name(address addr, char* buf,
a61af66fc99e Initial load
duke
parents:
diff changeset
1756 int buflen, int* offset) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1757 Dl_info dlinfo;
a61af66fc99e Initial load
duke
parents:
diff changeset
1758 struct _address_to_library_name data;
a61af66fc99e Initial load
duke
parents:
diff changeset
1759
a61af66fc99e Initial load
duke
parents:
diff changeset
1760 // There is a bug in old glibc dladdr() implementation that it could resolve
a61af66fc99e Initial load
duke
parents:
diff changeset
1761 // to wrong library name if the .so file has a base address != NULL. Here
a61af66fc99e Initial load
duke
parents:
diff changeset
1762 // we iterate through the program headers of all loaded libraries to find
a61af66fc99e Initial load
duke
parents:
diff changeset
1763 // out which library 'addr' really belongs to. This workaround can be
a61af66fc99e Initial load
duke
parents:
diff changeset
1764 // removed once the minimum requirement for glibc is moved to 2.3.x.
a61af66fc99e Initial load
duke
parents:
diff changeset
1765 data.addr = addr;
a61af66fc99e Initial load
duke
parents:
diff changeset
1766 data.fname = buf;
a61af66fc99e Initial load
duke
parents:
diff changeset
1767 data.buflen = buflen;
a61af66fc99e Initial load
duke
parents:
diff changeset
1768 data.base = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1769 int rslt = dl_iterate_phdr(address_to_library_name_callback, (void *)&data);
a61af66fc99e Initial load
duke
parents:
diff changeset
1770
a61af66fc99e Initial load
duke
parents:
diff changeset
1771 if (rslt) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1772 // buf already contains library name
a61af66fc99e Initial load
duke
parents:
diff changeset
1773 if (offset) *offset = addr - data.base;
a61af66fc99e Initial load
duke
parents:
diff changeset
1774 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1775 } else if (dladdr((void*)addr, &dlinfo)){
a61af66fc99e Initial load
duke
parents:
diff changeset
1776 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
a61af66fc99e Initial load
duke
parents:
diff changeset
1777 if (offset) *offset = addr - (address)dlinfo.dli_fbase;
a61af66fc99e Initial load
duke
parents:
diff changeset
1778 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1779 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1780 if (buf) buf[0] = '\0';
a61af66fc99e Initial load
duke
parents:
diff changeset
1781 if (offset) *offset = -1;
a61af66fc99e Initial load
duke
parents:
diff changeset
1782 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1783 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1784 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1785
a61af66fc99e Initial load
duke
parents:
diff changeset
1786 // Loads .dll/.so and
a61af66fc99e Initial load
duke
parents:
diff changeset
1787 // in case of error it checks if .dll/.so was built for the
a61af66fc99e Initial load
duke
parents:
diff changeset
1788 // same architecture as Hotspot is running on
a61af66fc99e Initial load
duke
parents:
diff changeset
1789
a61af66fc99e Initial load
duke
parents:
diff changeset
1790 void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
a61af66fc99e Initial load
duke
parents:
diff changeset
1791 {
a61af66fc99e Initial load
duke
parents:
diff changeset
1792 void * result= ::dlopen(filename, RTLD_LAZY);
a61af66fc99e Initial load
duke
parents:
diff changeset
1793 if (result != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1794 // Successful loading
a61af66fc99e Initial load
duke
parents:
diff changeset
1795 return result;
a61af66fc99e Initial load
duke
parents:
diff changeset
1796 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1797
a61af66fc99e Initial load
duke
parents:
diff changeset
1798 Elf32_Ehdr elf_head;
a61af66fc99e Initial load
duke
parents:
diff changeset
1799
a61af66fc99e Initial load
duke
parents:
diff changeset
1800 // Read system error message into ebuf
a61af66fc99e Initial load
duke
parents:
diff changeset
1801 // It may or may not be overwritten below
a61af66fc99e Initial load
duke
parents:
diff changeset
1802 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
a61af66fc99e Initial load
duke
parents:
diff changeset
1803 ebuf[ebuflen-1]='\0';
a61af66fc99e Initial load
duke
parents:
diff changeset
1804 int diag_msg_max_length=ebuflen-strlen(ebuf);
a61af66fc99e Initial load
duke
parents:
diff changeset
1805 char* diag_msg_buf=ebuf+strlen(ebuf);
a61af66fc99e Initial load
duke
parents:
diff changeset
1806
a61af66fc99e Initial load
duke
parents:
diff changeset
1807 if (diag_msg_max_length==0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1808 // No more space in ebuf for additional diagnostics message
a61af66fc99e Initial load
duke
parents:
diff changeset
1809 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1810 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1811
a61af66fc99e Initial load
duke
parents:
diff changeset
1812
a61af66fc99e Initial load
duke
parents:
diff changeset
1813 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
a61af66fc99e Initial load
duke
parents:
diff changeset
1814
a61af66fc99e Initial load
duke
parents:
diff changeset
1815 if (file_descriptor < 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1816 // Can't open library, report dlerror() message
a61af66fc99e Initial load
duke
parents:
diff changeset
1817 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1818 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1819
a61af66fc99e Initial load
duke
parents:
diff changeset
1820 bool failed_to_read_elf_head=
a61af66fc99e Initial load
duke
parents:
diff changeset
1821 (sizeof(elf_head)!=
a61af66fc99e Initial load
duke
parents:
diff changeset
1822 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ;
a61af66fc99e Initial load
duke
parents:
diff changeset
1823
a61af66fc99e Initial load
duke
parents:
diff changeset
1824 ::close(file_descriptor);
a61af66fc99e Initial load
duke
parents:
diff changeset
1825 if (failed_to_read_elf_head) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1826 // file i/o error - report dlerror() msg
a61af66fc99e Initial load
duke
parents:
diff changeset
1827 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1828 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1829
a61af66fc99e Initial load
duke
parents:
diff changeset
1830 typedef struct {
a61af66fc99e Initial load
duke
parents:
diff changeset
1831 Elf32_Half code; // Actual value as defined in elf.h
a61af66fc99e Initial load
duke
parents:
diff changeset
1832 Elf32_Half compat_class; // Compatibility of archs at VM's sense
a61af66fc99e Initial load
duke
parents:
diff changeset
1833 char elf_class; // 32 or 64 bit
a61af66fc99e Initial load
duke
parents:
diff changeset
1834 char endianess; // MSB or LSB
a61af66fc99e Initial load
duke
parents:
diff changeset
1835 char* name; // String representation
a61af66fc99e Initial load
duke
parents:
diff changeset
1836 } arch_t;
a61af66fc99e Initial load
duke
parents:
diff changeset
1837
a61af66fc99e Initial load
duke
parents:
diff changeset
1838 #ifndef EM_486
a61af66fc99e Initial load
duke
parents:
diff changeset
1839 #define EM_486 6 /* Intel 80486 */
a61af66fc99e Initial load
duke
parents:
diff changeset
1840 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
1841
a61af66fc99e Initial load
duke
parents:
diff changeset
1842 static const arch_t arch_array[]={
a61af66fc99e Initial load
duke
parents:
diff changeset
1843 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
a61af66fc99e Initial load
duke
parents:
diff changeset
1844 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
a61af66fc99e Initial load
duke
parents:
diff changeset
1845 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
a61af66fc99e Initial load
duke
parents:
diff changeset
1846 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
a61af66fc99e Initial load
duke
parents:
diff changeset
1847 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
a61af66fc99e Initial load
duke
parents:
diff changeset
1848 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
a61af66fc99e Initial load
duke
parents:
diff changeset
1849 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
a61af66fc99e Initial load
duke
parents:
diff changeset
1850 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
1010
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1851 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1852 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM"},
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1853 {EM_S390, EM_S390, ELFCLASSNONE, ELFDATA2MSB, (char*)"IBM System/390"},
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1854 {EM_ALPHA, EM_ALPHA, ELFCLASS64, ELFDATA2LSB, (char*)"Alpha"},
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1855 {EM_MIPS_RS3_LE, EM_MIPS_RS3_LE, ELFCLASS32, ELFDATA2LSB, (char*)"MIPSel"},
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1856 {EM_MIPS, EM_MIPS, ELFCLASS32, ELFDATA2MSB, (char*)"MIPS"},
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1857 {EM_PARISC, EM_PARISC, ELFCLASS32, ELFDATA2MSB, (char*)"PARISC"},
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1858 {EM_68K, EM_68K, ELFCLASS32, ELFDATA2MSB, (char*)"M68k"}
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1859 };
a61af66fc99e Initial load
duke
parents:
diff changeset
1860
a61af66fc99e Initial load
duke
parents:
diff changeset
1861 #if (defined IA32)
a61af66fc99e Initial load
duke
parents:
diff changeset
1862 static Elf32_Half running_arch_code=EM_386;
a61af66fc99e Initial load
duke
parents:
diff changeset
1863 #elif (defined AMD64)
a61af66fc99e Initial load
duke
parents:
diff changeset
1864 static Elf32_Half running_arch_code=EM_X86_64;
a61af66fc99e Initial load
duke
parents:
diff changeset
1865 #elif (defined IA64)
a61af66fc99e Initial load
duke
parents:
diff changeset
1866 static Elf32_Half running_arch_code=EM_IA_64;
a61af66fc99e Initial load
duke
parents:
diff changeset
1867 #elif (defined __sparc) && (defined _LP64)
a61af66fc99e Initial load
duke
parents:
diff changeset
1868 static Elf32_Half running_arch_code=EM_SPARCV9;
a61af66fc99e Initial load
duke
parents:
diff changeset
1869 #elif (defined __sparc) && (!defined _LP64)
a61af66fc99e Initial load
duke
parents:
diff changeset
1870 static Elf32_Half running_arch_code=EM_SPARC;
a61af66fc99e Initial load
duke
parents:
diff changeset
1871 #elif (defined __powerpc64__)
a61af66fc99e Initial load
duke
parents:
diff changeset
1872 static Elf32_Half running_arch_code=EM_PPC64;
a61af66fc99e Initial load
duke
parents:
diff changeset
1873 #elif (defined __powerpc__)
a61af66fc99e Initial load
duke
parents:
diff changeset
1874 static Elf32_Half running_arch_code=EM_PPC;
1010
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1875 #elif (defined ARM)
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1876 static Elf32_Half running_arch_code=EM_ARM;
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1877 #elif (defined S390)
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1878 static Elf32_Half running_arch_code=EM_S390;
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1879 #elif (defined ALPHA)
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1880 static Elf32_Half running_arch_code=EM_ALPHA;
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1881 #elif (defined MIPSEL)
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1882 static Elf32_Half running_arch_code=EM_MIPS_RS3_LE;
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1883 #elif (defined PARISC)
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1884 static Elf32_Half running_arch_code=EM_PARISC;
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1885 #elif (defined MIPS)
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1886 static Elf32_Half running_arch_code=EM_MIPS;
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1887 #elif (defined M68K)
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1888 static Elf32_Half running_arch_code=EM_68K;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1889 #else
a61af66fc99e Initial load
duke
parents:
diff changeset
1890 #error Method os::dll_load requires that one of following is defined:\
1010
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1891 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, S390, ALPHA, MIPS, MIPSEL, PARISC, M68K
0
a61af66fc99e Initial load
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parents:
diff changeset
1892 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
1893
a61af66fc99e Initial load
duke
parents:
diff changeset
1894 // Identify compatability class for VM's architecture and library's architecture
a61af66fc99e Initial load
duke
parents:
diff changeset
1895 // Obtain string descriptions for architectures
a61af66fc99e Initial load
duke
parents:
diff changeset
1896
a61af66fc99e Initial load
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parents:
diff changeset
1897 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
a61af66fc99e Initial load
duke
parents:
diff changeset
1898 int running_arch_index=-1;
a61af66fc99e Initial load
duke
parents:
diff changeset
1899
a61af66fc99e Initial load
duke
parents:
diff changeset
1900 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1901 if (running_arch_code == arch_array[i].code) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1902 running_arch_index = i;
a61af66fc99e Initial load
duke
parents:
diff changeset
1903 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1904 if (lib_arch.code == arch_array[i].code) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1905 lib_arch.compat_class = arch_array[i].compat_class;
a61af66fc99e Initial load
duke
parents:
diff changeset
1906 lib_arch.name = arch_array[i].name;
a61af66fc99e Initial load
duke
parents:
diff changeset
1907 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1908 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1909
a61af66fc99e Initial load
duke
parents:
diff changeset
1910 assert(running_arch_index != -1,
a61af66fc99e Initial load
duke
parents:
diff changeset
1911 "Didn't find running architecture code (running_arch_code) in arch_array");
a61af66fc99e Initial load
duke
parents:
diff changeset
1912 if (running_arch_index == -1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1913 // Even though running architecture detection failed
a61af66fc99e Initial load
duke
parents:
diff changeset
1914 // we may still continue with reporting dlerror() message
a61af66fc99e Initial load
duke
parents:
diff changeset
1915 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1916 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1917
a61af66fc99e Initial load
duke
parents:
diff changeset
1918 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1919 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
a61af66fc99e Initial load
duke
parents:
diff changeset
1920 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1921 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1922
1010
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1923 #ifndef S390
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1924 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1925 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
a61af66fc99e Initial load
duke
parents:
diff changeset
1926 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1927 }
1010
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
1928 #endif // !S390
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1929
a61af66fc99e Initial load
duke
parents:
diff changeset
1930 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1931 if ( lib_arch.name!=NULL ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1932 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
a61af66fc99e Initial load
duke
parents:
diff changeset
1933 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
a61af66fc99e Initial load
duke
parents:
diff changeset
1934 lib_arch.name, arch_array[running_arch_index].name);
a61af66fc99e Initial load
duke
parents:
diff changeset
1935 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1936 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
a61af66fc99e Initial load
duke
parents:
diff changeset
1937 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
a61af66fc99e Initial load
duke
parents:
diff changeset
1938 lib_arch.code,
a61af66fc99e Initial load
duke
parents:
diff changeset
1939 arch_array[running_arch_index].name);
a61af66fc99e Initial load
duke
parents:
diff changeset
1940 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1941 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1942
a61af66fc99e Initial load
duke
parents:
diff changeset
1943 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1944 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1945
242
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1946 /*
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1947 * glibc-2.0 libdl is not MT safe. If you are building with any glibc,
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1948 * chances are you might want to run the generated bits against glibc-2.0
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1949 * libdl.so, so always use locking for any version of glibc.
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1950 */
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1951 void* os::dll_lookup(void* handle, const char* name) {
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1952 pthread_mutex_lock(&dl_mutex);
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1953 void* res = dlsym(handle, name);
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1954 pthread_mutex_unlock(&dl_mutex);
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1955 return res;
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
1956 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1957
a61af66fc99e Initial load
duke
parents:
diff changeset
1958
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1959 static bool _print_ascii_file(const char* filename, outputStream* st) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1960 int fd = ::open(filename, O_RDONLY);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1961 if (fd == -1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1962 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1963 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1964
a61af66fc99e Initial load
duke
parents:
diff changeset
1965 char buf[32];
a61af66fc99e Initial load
duke
parents:
diff changeset
1966 int bytes;
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1967 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1968 st->print_raw(buf, bytes);
a61af66fc99e Initial load
duke
parents:
diff changeset
1969 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1970
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
1971 ::close(fd);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1972
a61af66fc99e Initial load
duke
parents:
diff changeset
1973 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1974 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1975
a61af66fc99e Initial load
duke
parents:
diff changeset
1976 void os::print_dll_info(outputStream *st) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1977 st->print_cr("Dynamic libraries:");
a61af66fc99e Initial load
duke
parents:
diff changeset
1978
a61af66fc99e Initial load
duke
parents:
diff changeset
1979 char fname[32];
a61af66fc99e Initial load
duke
parents:
diff changeset
1980 pid_t pid = os::Linux::gettid();
a61af66fc99e Initial load
duke
parents:
diff changeset
1981
a61af66fc99e Initial load
duke
parents:
diff changeset
1982 jio_snprintf(fname, sizeof(fname), "/proc/%d/maps", pid);
a61af66fc99e Initial load
duke
parents:
diff changeset
1983
a61af66fc99e Initial load
duke
parents:
diff changeset
1984 if (!_print_ascii_file(fname, st)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1985 st->print("Can not get library information for pid = %d\n", pid);
a61af66fc99e Initial load
duke
parents:
diff changeset
1986 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1987 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1988
a61af66fc99e Initial load
duke
parents:
diff changeset
1989
a61af66fc99e Initial load
duke
parents:
diff changeset
1990 void os::print_os_info(outputStream* st) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1991 st->print("OS:");
a61af66fc99e Initial load
duke
parents:
diff changeset
1992
a61af66fc99e Initial load
duke
parents:
diff changeset
1993 // Try to identify popular distros.
a61af66fc99e Initial load
duke
parents:
diff changeset
1994 // Most Linux distributions have /etc/XXX-release file, which contains
a61af66fc99e Initial load
duke
parents:
diff changeset
1995 // the OS version string. Some have more than one /etc/XXX-release file
a61af66fc99e Initial load
duke
parents:
diff changeset
1996 // (e.g. Mandrake has both /etc/mandrake-release and /etc/redhat-release.),
a61af66fc99e Initial load
duke
parents:
diff changeset
1997 // so the order is important.
a61af66fc99e Initial load
duke
parents:
diff changeset
1998 if (!_print_ascii_file("/etc/mandrake-release", st) &&
a61af66fc99e Initial load
duke
parents:
diff changeset
1999 !_print_ascii_file("/etc/sun-release", st) &&
a61af66fc99e Initial load
duke
parents:
diff changeset
2000 !_print_ascii_file("/etc/redhat-release", st) &&
a61af66fc99e Initial load
duke
parents:
diff changeset
2001 !_print_ascii_file("/etc/SuSE-release", st) &&
a61af66fc99e Initial load
duke
parents:
diff changeset
2002 !_print_ascii_file("/etc/turbolinux-release", st) &&
a61af66fc99e Initial load
duke
parents:
diff changeset
2003 !_print_ascii_file("/etc/gentoo-release", st) &&
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2004 !_print_ascii_file("/etc/debian_version", st) &&
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2005 !_print_ascii_file("/etc/ltib-release", st) &&
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2006 !_print_ascii_file("/etc/angstrom-version", st)) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2007 st->print("Linux");
a61af66fc99e Initial load
duke
parents:
diff changeset
2008 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2009 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
2010
a61af66fc99e Initial load
duke
parents:
diff changeset
2011 // kernel
a61af66fc99e Initial load
duke
parents:
diff changeset
2012 st->print("uname:");
a61af66fc99e Initial load
duke
parents:
diff changeset
2013 struct utsname name;
a61af66fc99e Initial load
duke
parents:
diff changeset
2014 uname(&name);
a61af66fc99e Initial load
duke
parents:
diff changeset
2015 st->print(name.sysname); st->print(" ");
a61af66fc99e Initial load
duke
parents:
diff changeset
2016 st->print(name.release); st->print(" ");
a61af66fc99e Initial load
duke
parents:
diff changeset
2017 st->print(name.version); st->print(" ");
a61af66fc99e Initial load
duke
parents:
diff changeset
2018 st->print(name.machine);
a61af66fc99e Initial load
duke
parents:
diff changeset
2019 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
2020
a61af66fc99e Initial load
duke
parents:
diff changeset
2021 // Print warning if unsafe chroot environment detected
a61af66fc99e Initial load
duke
parents:
diff changeset
2022 if (unsafe_chroot_detected) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2023 st->print("WARNING!! ");
a61af66fc99e Initial load
duke
parents:
diff changeset
2024 st->print_cr(unstable_chroot_error);
a61af66fc99e Initial load
duke
parents:
diff changeset
2025 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2026
a61af66fc99e Initial load
duke
parents:
diff changeset
2027 // libc, pthread
a61af66fc99e Initial load
duke
parents:
diff changeset
2028 st->print("libc:");
a61af66fc99e Initial load
duke
parents:
diff changeset
2029 st->print(os::Linux::glibc_version()); st->print(" ");
a61af66fc99e Initial load
duke
parents:
diff changeset
2030 st->print(os::Linux::libpthread_version()); st->print(" ");
a61af66fc99e Initial load
duke
parents:
diff changeset
2031 if (os::Linux::is_LinuxThreads()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2032 st->print("(%s stack)", os::Linux::is_floating_stack() ? "floating" : "fixed");
a61af66fc99e Initial load
duke
parents:
diff changeset
2033 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2034 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
2035
a61af66fc99e Initial load
duke
parents:
diff changeset
2036 // rlimit
a61af66fc99e Initial load
duke
parents:
diff changeset
2037 st->print("rlimit:");
a61af66fc99e Initial load
duke
parents:
diff changeset
2038 struct rlimit rlim;
a61af66fc99e Initial load
duke
parents:
diff changeset
2039
a61af66fc99e Initial load
duke
parents:
diff changeset
2040 st->print(" STACK ");
a61af66fc99e Initial load
duke
parents:
diff changeset
2041 getrlimit(RLIMIT_STACK, &rlim);
a61af66fc99e Initial load
duke
parents:
diff changeset
2042 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
a61af66fc99e Initial load
duke
parents:
diff changeset
2043 else st->print("%uk", rlim.rlim_cur >> 10);
a61af66fc99e Initial load
duke
parents:
diff changeset
2044
a61af66fc99e Initial load
duke
parents:
diff changeset
2045 st->print(", CORE ");
a61af66fc99e Initial load
duke
parents:
diff changeset
2046 getrlimit(RLIMIT_CORE, &rlim);
a61af66fc99e Initial load
duke
parents:
diff changeset
2047 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
a61af66fc99e Initial load
duke
parents:
diff changeset
2048 else st->print("%uk", rlim.rlim_cur >> 10);
a61af66fc99e Initial load
duke
parents:
diff changeset
2049
a61af66fc99e Initial load
duke
parents:
diff changeset
2050 st->print(", NPROC ");
a61af66fc99e Initial load
duke
parents:
diff changeset
2051 getrlimit(RLIMIT_NPROC, &rlim);
a61af66fc99e Initial load
duke
parents:
diff changeset
2052 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
a61af66fc99e Initial load
duke
parents:
diff changeset
2053 else st->print("%d", rlim.rlim_cur);
a61af66fc99e Initial load
duke
parents:
diff changeset
2054
a61af66fc99e Initial load
duke
parents:
diff changeset
2055 st->print(", NOFILE ");
a61af66fc99e Initial load
duke
parents:
diff changeset
2056 getrlimit(RLIMIT_NOFILE, &rlim);
a61af66fc99e Initial load
duke
parents:
diff changeset
2057 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
a61af66fc99e Initial load
duke
parents:
diff changeset
2058 else st->print("%d", rlim.rlim_cur);
a61af66fc99e Initial load
duke
parents:
diff changeset
2059
a61af66fc99e Initial load
duke
parents:
diff changeset
2060 st->print(", AS ");
a61af66fc99e Initial load
duke
parents:
diff changeset
2061 getrlimit(RLIMIT_AS, &rlim);
a61af66fc99e Initial load
duke
parents:
diff changeset
2062 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
a61af66fc99e Initial load
duke
parents:
diff changeset
2063 else st->print("%uk", rlim.rlim_cur >> 10);
a61af66fc99e Initial load
duke
parents:
diff changeset
2064 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
2065
a61af66fc99e Initial load
duke
parents:
diff changeset
2066 // load average
a61af66fc99e Initial load
duke
parents:
diff changeset
2067 st->print("load average:");
a61af66fc99e Initial load
duke
parents:
diff changeset
2068 double loadavg[3];
a61af66fc99e Initial load
duke
parents:
diff changeset
2069 os::loadavg(loadavg, 3);
a61af66fc99e Initial load
duke
parents:
diff changeset
2070 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]);
a61af66fc99e Initial load
duke
parents:
diff changeset
2071 st->cr();
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2072
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2073 // meminfo
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2074 st->print("\n/proc/meminfo:\n");
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2075 _print_ascii_file("/proc/meminfo", st);
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2076 st->cr();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2077 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2078
a61af66fc99e Initial load
duke
parents:
diff changeset
2079 void os::print_memory_info(outputStream* st) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2080
a61af66fc99e Initial load
duke
parents:
diff changeset
2081 st->print("Memory:");
a61af66fc99e Initial load
duke
parents:
diff changeset
2082 st->print(" %dk page", os::vm_page_size()>>10);
a61af66fc99e Initial load
duke
parents:
diff changeset
2083
a61af66fc99e Initial load
duke
parents:
diff changeset
2084 // values in struct sysinfo are "unsigned long"
a61af66fc99e Initial load
duke
parents:
diff changeset
2085 struct sysinfo si;
a61af66fc99e Initial load
duke
parents:
diff changeset
2086 sysinfo(&si);
a61af66fc99e Initial load
duke
parents:
diff changeset
2087
a61af66fc99e Initial load
duke
parents:
diff changeset
2088 st->print(", physical " UINT64_FORMAT "k",
a61af66fc99e Initial load
duke
parents:
diff changeset
2089 os::physical_memory() >> 10);
a61af66fc99e Initial load
duke
parents:
diff changeset
2090 st->print("(" UINT64_FORMAT "k free)",
a61af66fc99e Initial load
duke
parents:
diff changeset
2091 os::available_memory() >> 10);
a61af66fc99e Initial load
duke
parents:
diff changeset
2092 st->print(", swap " UINT64_FORMAT "k",
a61af66fc99e Initial load
duke
parents:
diff changeset
2093 ((jlong)si.totalswap * si.mem_unit) >> 10);
a61af66fc99e Initial load
duke
parents:
diff changeset
2094 st->print("(" UINT64_FORMAT "k free)",
a61af66fc99e Initial load
duke
parents:
diff changeset
2095 ((jlong)si.freeswap * si.mem_unit) >> 10);
a61af66fc99e Initial load
duke
parents:
diff changeset
2096 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
2097 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2098
a61af66fc99e Initial load
duke
parents:
diff changeset
2099 // Taken from /usr/include/bits/siginfo.h Supposed to be architecture specific
a61af66fc99e Initial load
duke
parents:
diff changeset
2100 // but they're the same for all the linux arch that we support
a61af66fc99e Initial load
duke
parents:
diff changeset
2101 // and they're the same for solaris but there's no common place to put this.
a61af66fc99e Initial load
duke
parents:
diff changeset
2102 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR",
a61af66fc99e Initial load
duke
parents:
diff changeset
2103 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG",
a61af66fc99e Initial load
duke
parents:
diff changeset
2104 "ILL_COPROC", "ILL_BADSTK" };
a61af66fc99e Initial load
duke
parents:
diff changeset
2105
a61af66fc99e Initial load
duke
parents:
diff changeset
2106 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV",
a61af66fc99e Initial load
duke
parents:
diff changeset
2107 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES",
a61af66fc99e Initial load
duke
parents:
diff changeset
2108 "FPE_FLTINV", "FPE_FLTSUB", "FPE_FLTDEN" };
a61af66fc99e Initial load
duke
parents:
diff changeset
2109
a61af66fc99e Initial load
duke
parents:
diff changeset
2110 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" };
a61af66fc99e Initial load
duke
parents:
diff changeset
2111
a61af66fc99e Initial load
duke
parents:
diff changeset
2112 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" };
a61af66fc99e Initial load
duke
parents:
diff changeset
2113
a61af66fc99e Initial load
duke
parents:
diff changeset
2114 void os::print_siginfo(outputStream* st, void* siginfo) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2115 st->print("siginfo:");
a61af66fc99e Initial load
duke
parents:
diff changeset
2116
a61af66fc99e Initial load
duke
parents:
diff changeset
2117 const int buflen = 100;
a61af66fc99e Initial load
duke
parents:
diff changeset
2118 char buf[buflen];
a61af66fc99e Initial load
duke
parents:
diff changeset
2119 siginfo_t *si = (siginfo_t*)siginfo;
a61af66fc99e Initial load
duke
parents:
diff changeset
2120 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen));
a61af66fc99e Initial load
duke
parents:
diff changeset
2121 if (si->si_errno != 0 && strerror_r(si->si_errno, buf, buflen) == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2122 st->print("si_errno=%s", buf);
a61af66fc99e Initial load
duke
parents:
diff changeset
2123 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2124 st->print("si_errno=%d", si->si_errno);
a61af66fc99e Initial load
duke
parents:
diff changeset
2125 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2126 const int c = si->si_code;
a61af66fc99e Initial load
duke
parents:
diff changeset
2127 assert(c > 0, "unexpected si_code");
a61af66fc99e Initial load
duke
parents:
diff changeset
2128 switch (si->si_signo) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2129 case SIGILL:
a61af66fc99e Initial load
duke
parents:
diff changeset
2130 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]);
a61af66fc99e Initial load
duke
parents:
diff changeset
2131 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
a61af66fc99e Initial load
duke
parents:
diff changeset
2132 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2133 case SIGFPE:
a61af66fc99e Initial load
duke
parents:
diff changeset
2134 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]);
a61af66fc99e Initial load
duke
parents:
diff changeset
2135 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
a61af66fc99e Initial load
duke
parents:
diff changeset
2136 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2137 case SIGSEGV:
a61af66fc99e Initial load
duke
parents:
diff changeset
2138 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]);
a61af66fc99e Initial load
duke
parents:
diff changeset
2139 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
a61af66fc99e Initial load
duke
parents:
diff changeset
2140 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2141 case SIGBUS:
a61af66fc99e Initial load
duke
parents:
diff changeset
2142 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]);
a61af66fc99e Initial load
duke
parents:
diff changeset
2143 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
a61af66fc99e Initial load
duke
parents:
diff changeset
2144 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2145 default:
a61af66fc99e Initial load
duke
parents:
diff changeset
2146 st->print(", si_code=%d", si->si_code);
a61af66fc99e Initial load
duke
parents:
diff changeset
2147 // no si_addr
a61af66fc99e Initial load
duke
parents:
diff changeset
2148 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2149
a61af66fc99e Initial load
duke
parents:
diff changeset
2150 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
a61af66fc99e Initial load
duke
parents:
diff changeset
2151 UseSharedSpaces) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2152 FileMapInfo* mapinfo = FileMapInfo::current_info();
a61af66fc99e Initial load
duke
parents:
diff changeset
2153 if (mapinfo->is_in_shared_space(si->si_addr)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2154 st->print("\n\nError accessing class data sharing archive." \
a61af66fc99e Initial load
duke
parents:
diff changeset
2155 " Mapped file inaccessible during execution, " \
a61af66fc99e Initial load
duke
parents:
diff changeset
2156 " possible disk/network problem.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2157 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2158 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2159 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
2160 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2161
a61af66fc99e Initial load
duke
parents:
diff changeset
2162
a61af66fc99e Initial load
duke
parents:
diff changeset
2163 static void print_signal_handler(outputStream* st, int sig,
a61af66fc99e Initial load
duke
parents:
diff changeset
2164 char* buf, size_t buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2165
a61af66fc99e Initial load
duke
parents:
diff changeset
2166 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2167 st->print_cr("Signal Handlers:");
a61af66fc99e Initial load
duke
parents:
diff changeset
2168 print_signal_handler(st, SIGSEGV, buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2169 print_signal_handler(st, SIGBUS , buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2170 print_signal_handler(st, SIGFPE , buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2171 print_signal_handler(st, SIGPIPE, buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2172 print_signal_handler(st, SIGXFSZ, buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2173 print_signal_handler(st, SIGILL , buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2174 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2175 print_signal_handler(st, SR_signum, buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2176 print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2177 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2178 print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2179 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2180 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2181
a61af66fc99e Initial load
duke
parents:
diff changeset
2182 static char saved_jvm_path[MAXPATHLEN] = {0};
a61af66fc99e Initial load
duke
parents:
diff changeset
2183
a61af66fc99e Initial load
duke
parents:
diff changeset
2184 // Find the full path to the current module, libjvm.so or libjvm_g.so
1642
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2185 void os::jvm_path(char *buf, jint buflen) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2186 // Error checking.
1642
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2187 if (buflen < MAXPATHLEN) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2188 assert(false, "must use a large-enough buffer");
a61af66fc99e Initial load
duke
parents:
diff changeset
2189 buf[0] = '\0';
a61af66fc99e Initial load
duke
parents:
diff changeset
2190 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2191 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2192 // Lazy resolve the path to current module.
a61af66fc99e Initial load
duke
parents:
diff changeset
2193 if (saved_jvm_path[0] != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2194 strcpy(buf, saved_jvm_path);
a61af66fc99e Initial load
duke
parents:
diff changeset
2195 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2196 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2197
a61af66fc99e Initial load
duke
parents:
diff changeset
2198 char dli_fname[MAXPATHLEN];
a61af66fc99e Initial load
duke
parents:
diff changeset
2199 bool ret = dll_address_to_library_name(
a61af66fc99e Initial load
duke
parents:
diff changeset
2200 CAST_FROM_FN_PTR(address, os::jvm_path),
a61af66fc99e Initial load
duke
parents:
diff changeset
2201 dli_fname, sizeof(dli_fname), NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
2202 assert(ret != 0, "cannot locate libjvm");
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2203 char *rp = realpath(dli_fname, buf);
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2204 if (rp == NULL)
513
2328d1d3f8cf 6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents: 477
diff changeset
2205 return;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2206
a61af66fc99e Initial load
duke
parents:
diff changeset
2207 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2208 // Support for the gamma launcher. Typical value for buf is
a61af66fc99e Initial load
duke
parents:
diff changeset
2209 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at
a61af66fc99e Initial load
duke
parents:
diff changeset
2210 // the right place in the string, then assume we are installed in a JDK and
a61af66fc99e Initial load
duke
parents:
diff changeset
2211 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix
a61af66fc99e Initial load
duke
parents:
diff changeset
2212 // up the path so it looks like libjvm.so is installed there (append a
a61af66fc99e Initial load
duke
parents:
diff changeset
2213 // fake suffix hotspot/libjvm.so).
a61af66fc99e Initial load
duke
parents:
diff changeset
2214 const char *p = buf + strlen(buf) - 1;
a61af66fc99e Initial load
duke
parents:
diff changeset
2215 for (int count = 0; p > buf && count < 5; ++count) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2216 for (--p; p > buf && *p != '/'; --p)
a61af66fc99e Initial load
duke
parents:
diff changeset
2217 /* empty */ ;
a61af66fc99e Initial load
duke
parents:
diff changeset
2218 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2219
a61af66fc99e Initial load
duke
parents:
diff changeset
2220 if (strncmp(p, "/jre/lib/", 9) != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2221 // Look for JAVA_HOME in the environment.
a61af66fc99e Initial load
duke
parents:
diff changeset
2222 char* java_home_var = ::getenv("JAVA_HOME");
a61af66fc99e Initial load
duke
parents:
diff changeset
2223 if (java_home_var != NULL && java_home_var[0] != 0) {
1642
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2224 char* jrelib_p;
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2225 int len;
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2226
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2227 // Check the current module name "libjvm.so" or "libjvm_g.so".
a61af66fc99e Initial load
duke
parents:
diff changeset
2228 p = strrchr(buf, '/');
a61af66fc99e Initial load
duke
parents:
diff changeset
2229 assert(strstr(p, "/libjvm") == p, "invalid library name");
a61af66fc99e Initial load
duke
parents:
diff changeset
2230 p = strstr(p, "_g") ? "_g" : "";
a61af66fc99e Initial load
duke
parents:
diff changeset
2231
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2232 rp = realpath(java_home_var, buf);
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2233 if (rp == NULL)
513
2328d1d3f8cf 6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents: 477
diff changeset
2234 return;
1642
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2235
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2236 // determine if this is a legacy image or modules image
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2237 // modules image doesn't have "jre" subdirectory
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2238 len = strlen(buf);
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2239 jrelib_p = buf + len;
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2240 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2241 if (0 != access(buf, F_OK)) {
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2242 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2243 }
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2244
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2245 if (0 == access(buf, F_OK)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2246 // Use current module name "libjvm[_g].so" instead of
a61af66fc99e Initial load
duke
parents:
diff changeset
2247 // "libjvm"debug_only("_g")".so" since for fastdebug version
a61af66fc99e Initial load
duke
parents:
diff changeset
2248 // we should have "libjvm.so" but debug_only("_g") adds "_g"!
1642
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2249 len = strlen(buf);
0e7d2a08b605 6967423: Hotspot support for modules image
mchung
parents: 1552
diff changeset
2250 snprintf(buf + len, buflen-len, "/hotspot/libjvm%s.so", p);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2251 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2252 // Go back to path of .so
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2253 rp = realpath(dli_fname, buf);
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2254 if (rp == NULL)
513
2328d1d3f8cf 6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents: 477
diff changeset
2255 return;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2256 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2257 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2258 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2259 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2260
a61af66fc99e Initial load
duke
parents:
diff changeset
2261 strcpy(saved_jvm_path, buf);
a61af66fc99e Initial load
duke
parents:
diff changeset
2262 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2263
a61af66fc99e Initial load
duke
parents:
diff changeset
2264 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2265 // no prefix required, not even "_"
a61af66fc99e Initial load
duke
parents:
diff changeset
2266 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2267
a61af66fc99e Initial load
duke
parents:
diff changeset
2268 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2269 // no suffix required
a61af66fc99e Initial load
duke
parents:
diff changeset
2270 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2271
a61af66fc99e Initial load
duke
parents:
diff changeset
2272 ////////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
2273 // sun.misc.Signal support
a61af66fc99e Initial load
duke
parents:
diff changeset
2274
a61af66fc99e Initial load
duke
parents:
diff changeset
2275 static volatile jint sigint_count = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2276
a61af66fc99e Initial load
duke
parents:
diff changeset
2277 static void
a61af66fc99e Initial load
duke
parents:
diff changeset
2278 UserHandler(int sig, void *siginfo, void *context) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2279 // 4511530 - sem_post is serialized and handled by the manager thread. When
a61af66fc99e Initial load
duke
parents:
diff changeset
2280 // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We
a61af66fc99e Initial load
duke
parents:
diff changeset
2281 // don't want to flood the manager thread with sem_post requests.
a61af66fc99e Initial load
duke
parents:
diff changeset
2282 if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1)
a61af66fc99e Initial load
duke
parents:
diff changeset
2283 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2284
a61af66fc99e Initial load
duke
parents:
diff changeset
2285 // Ctrl-C is pressed during error reporting, likely because the error
a61af66fc99e Initial load
duke
parents:
diff changeset
2286 // handler fails to abort. Let VM die immediately.
a61af66fc99e Initial load
duke
parents:
diff changeset
2287 if (sig == SIGINT && is_error_reported()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2288 os::die();
a61af66fc99e Initial load
duke
parents:
diff changeset
2289 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2290
a61af66fc99e Initial load
duke
parents:
diff changeset
2291 os::signal_notify(sig);
a61af66fc99e Initial load
duke
parents:
diff changeset
2292 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2293
a61af66fc99e Initial load
duke
parents:
diff changeset
2294 void* os::user_handler() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2295 return CAST_FROM_FN_PTR(void*, UserHandler);
a61af66fc99e Initial load
duke
parents:
diff changeset
2296 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2297
a61af66fc99e Initial load
duke
parents:
diff changeset
2298 extern "C" {
a61af66fc99e Initial load
duke
parents:
diff changeset
2299 typedef void (*sa_handler_t)(int);
a61af66fc99e Initial load
duke
parents:
diff changeset
2300 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
a61af66fc99e Initial load
duke
parents:
diff changeset
2301 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2302
a61af66fc99e Initial load
duke
parents:
diff changeset
2303 void* os::signal(int signal_number, void* handler) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2304 struct sigaction sigAct, oldSigAct;
a61af66fc99e Initial load
duke
parents:
diff changeset
2305
a61af66fc99e Initial load
duke
parents:
diff changeset
2306 sigfillset(&(sigAct.sa_mask));
a61af66fc99e Initial load
duke
parents:
diff changeset
2307 sigAct.sa_flags = SA_RESTART|SA_SIGINFO;
a61af66fc99e Initial load
duke
parents:
diff changeset
2308 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
a61af66fc99e Initial load
duke
parents:
diff changeset
2309
a61af66fc99e Initial load
duke
parents:
diff changeset
2310 if (sigaction(signal_number, &sigAct, &oldSigAct)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2311 // -1 means registration failed
a61af66fc99e Initial load
duke
parents:
diff changeset
2312 return (void *)-1;
a61af66fc99e Initial load
duke
parents:
diff changeset
2313 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2314
a61af66fc99e Initial load
duke
parents:
diff changeset
2315 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
a61af66fc99e Initial load
duke
parents:
diff changeset
2316 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2317
a61af66fc99e Initial load
duke
parents:
diff changeset
2318 void os::signal_raise(int signal_number) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2319 ::raise(signal_number);
a61af66fc99e Initial load
duke
parents:
diff changeset
2320 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2321
a61af66fc99e Initial load
duke
parents:
diff changeset
2322 /*
a61af66fc99e Initial load
duke
parents:
diff changeset
2323 * The following code is moved from os.cpp for making this
a61af66fc99e Initial load
duke
parents:
diff changeset
2324 * code platform specific, which it is by its very nature.
a61af66fc99e Initial load
duke
parents:
diff changeset
2325 */
a61af66fc99e Initial load
duke
parents:
diff changeset
2326
a61af66fc99e Initial load
duke
parents:
diff changeset
2327 // Will be modified when max signal is changed to be dynamic
a61af66fc99e Initial load
duke
parents:
diff changeset
2328 int os::sigexitnum_pd() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2329 return NSIG;
a61af66fc99e Initial load
duke
parents:
diff changeset
2330 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2331
a61af66fc99e Initial load
duke
parents:
diff changeset
2332 // a counter for each possible signal value
a61af66fc99e Initial load
duke
parents:
diff changeset
2333 static volatile jint pending_signals[NSIG+1] = { 0 };
a61af66fc99e Initial load
duke
parents:
diff changeset
2334
a61af66fc99e Initial load
duke
parents:
diff changeset
2335 // Linux(POSIX) specific hand shaking semaphore.
a61af66fc99e Initial load
duke
parents:
diff changeset
2336 static sem_t sig_sem;
a61af66fc99e Initial load
duke
parents:
diff changeset
2337
a61af66fc99e Initial load
duke
parents:
diff changeset
2338 void os::signal_init_pd() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2339 // Initialize signal structures
a61af66fc99e Initial load
duke
parents:
diff changeset
2340 ::memset((void*)pending_signals, 0, sizeof(pending_signals));
a61af66fc99e Initial load
duke
parents:
diff changeset
2341
a61af66fc99e Initial load
duke
parents:
diff changeset
2342 // Initialize signal semaphore
a61af66fc99e Initial load
duke
parents:
diff changeset
2343 ::sem_init(&sig_sem, 0, 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
2344 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2345
a61af66fc99e Initial load
duke
parents:
diff changeset
2346 void os::signal_notify(int sig) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2347 Atomic::inc(&pending_signals[sig]);
a61af66fc99e Initial load
duke
parents:
diff changeset
2348 ::sem_post(&sig_sem);
a61af66fc99e Initial load
duke
parents:
diff changeset
2349 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2350
a61af66fc99e Initial load
duke
parents:
diff changeset
2351 static int check_pending_signals(bool wait) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2352 Atomic::store(0, &sigint_count);
a61af66fc99e Initial load
duke
parents:
diff changeset
2353 for (;;) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2354 for (int i = 0; i < NSIG + 1; i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2355 jint n = pending_signals[i];
a61af66fc99e Initial load
duke
parents:
diff changeset
2356 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2357 return i;
a61af66fc99e Initial load
duke
parents:
diff changeset
2358 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2359 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2360 if (!wait) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2361 return -1;
a61af66fc99e Initial load
duke
parents:
diff changeset
2362 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2363 JavaThread *thread = JavaThread::current();
a61af66fc99e Initial load
duke
parents:
diff changeset
2364 ThreadBlockInVM tbivm(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
2365
a61af66fc99e Initial load
duke
parents:
diff changeset
2366 bool threadIsSuspended;
a61af66fc99e Initial load
duke
parents:
diff changeset
2367 do {
a61af66fc99e Initial load
duke
parents:
diff changeset
2368 thread->set_suspend_equivalent();
a61af66fc99e Initial load
duke
parents:
diff changeset
2369 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
a61af66fc99e Initial load
duke
parents:
diff changeset
2370 ::sem_wait(&sig_sem);
a61af66fc99e Initial load
duke
parents:
diff changeset
2371
a61af66fc99e Initial load
duke
parents:
diff changeset
2372 // were we externally suspended while we were waiting?
a61af66fc99e Initial load
duke
parents:
diff changeset
2373 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
a61af66fc99e Initial load
duke
parents:
diff changeset
2374 if (threadIsSuspended) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2375 //
a61af66fc99e Initial load
duke
parents:
diff changeset
2376 // The semaphore has been incremented, but while we were waiting
a61af66fc99e Initial load
duke
parents:
diff changeset
2377 // another thread suspended us. We don't want to continue running
a61af66fc99e Initial load
duke
parents:
diff changeset
2378 // while suspended because that would surprise the thread that
a61af66fc99e Initial load
duke
parents:
diff changeset
2379 // suspended us.
a61af66fc99e Initial load
duke
parents:
diff changeset
2380 //
a61af66fc99e Initial load
duke
parents:
diff changeset
2381 ::sem_post(&sig_sem);
a61af66fc99e Initial load
duke
parents:
diff changeset
2382
a61af66fc99e Initial load
duke
parents:
diff changeset
2383 thread->java_suspend_self();
a61af66fc99e Initial load
duke
parents:
diff changeset
2384 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2385 } while (threadIsSuspended);
a61af66fc99e Initial load
duke
parents:
diff changeset
2386 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2387 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2388
a61af66fc99e Initial load
duke
parents:
diff changeset
2389 int os::signal_lookup() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2390 return check_pending_signals(false);
a61af66fc99e Initial load
duke
parents:
diff changeset
2391 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2392
a61af66fc99e Initial load
duke
parents:
diff changeset
2393 int os::signal_wait() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2394 return check_pending_signals(true);
a61af66fc99e Initial load
duke
parents:
diff changeset
2395 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2396
a61af66fc99e Initial load
duke
parents:
diff changeset
2397 ////////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
2398 // Virtual Memory
a61af66fc99e Initial load
duke
parents:
diff changeset
2399
a61af66fc99e Initial load
duke
parents:
diff changeset
2400 int os::vm_page_size() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2401 // Seems redundant as all get out
a61af66fc99e Initial load
duke
parents:
diff changeset
2402 assert(os::Linux::page_size() != -1, "must call os::init");
a61af66fc99e Initial load
duke
parents:
diff changeset
2403 return os::Linux::page_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
2404 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2405
a61af66fc99e Initial load
duke
parents:
diff changeset
2406 // Solaris allocates memory by pages.
a61af66fc99e Initial load
duke
parents:
diff changeset
2407 int os::vm_allocation_granularity() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2408 assert(os::Linux::page_size() != -1, "must call os::init");
a61af66fc99e Initial load
duke
parents:
diff changeset
2409 return os::Linux::page_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
2410 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2411
a61af66fc99e Initial load
duke
parents:
diff changeset
2412 // Rationale behind this function:
a61af66fc99e Initial load
duke
parents:
diff changeset
2413 // current (Mon Apr 25 20:12:18 MSD 2005) oprofile drops samples without executable
a61af66fc99e Initial load
duke
parents:
diff changeset
2414 // mapping for address (see lookup_dcookie() in the kernel module), thus we cannot get
a61af66fc99e Initial load
duke
parents:
diff changeset
2415 // samples for JITted code. Here we create private executable mapping over the code cache
a61af66fc99e Initial load
duke
parents:
diff changeset
2416 // and then we can use standard (well, almost, as mapping can change) way to provide
a61af66fc99e Initial load
duke
parents:
diff changeset
2417 // info for the reporting script by storing timestamp and location of symbol
a61af66fc99e Initial load
duke
parents:
diff changeset
2418 void linux_wrap_code(char* base, size_t size) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2419 static volatile jint cnt = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2420
a61af66fc99e Initial load
duke
parents:
diff changeset
2421 if (!UseOprofile) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2422 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2423 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2424
1497
96d554193f72 6944822: Fix for 6938627 exposes problem with hard-coded buffer sizes
coleenp
parents: 1353
diff changeset
2425 char buf[PATH_MAX+1];
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2426 int num = Atomic::add(1, &cnt);
a61af66fc99e Initial load
duke
parents:
diff changeset
2427
1353
a2ea687fdc7c 6938627: Make temporary directory use property java.io.tmpdir when specified
coleenp
parents: 1325
diff changeset
2428 snprintf(buf, sizeof(buf), "%s/hs-vm-%d-%d",
a2ea687fdc7c 6938627: Make temporary directory use property java.io.tmpdir when specified
coleenp
parents: 1325
diff changeset
2429 os::get_temp_directory(), os::current_process_id(), num);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2430 unlink(buf);
a61af66fc99e Initial load
duke
parents:
diff changeset
2431
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
2432 int fd = ::open(buf, O_CREAT | O_RDWR, S_IRWXU);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2433
a61af66fc99e Initial load
duke
parents:
diff changeset
2434 if (fd != -1) {
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
2435 off_t rv = ::lseek(fd, size-2, SEEK_SET);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2436 if (rv != (off_t)-1) {
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
2437 if (::write(fd, "", 1) == 1) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2438 mmap(base, size,
a61af66fc99e Initial load
duke
parents:
diff changeset
2439 PROT_READ|PROT_WRITE|PROT_EXEC,
a61af66fc99e Initial load
duke
parents:
diff changeset
2440 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, fd, 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
2441 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2442 }
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
2443 ::close(fd);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2444 unlink(buf);
a61af66fc99e Initial load
duke
parents:
diff changeset
2445 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2446 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2447
a61af66fc99e Initial load
duke
parents:
diff changeset
2448 // NOTE: Linux kernel does not really reserve the pages for us.
a61af66fc99e Initial load
duke
parents:
diff changeset
2449 // All it does is to check if there are enough free pages
a61af66fc99e Initial load
duke
parents:
diff changeset
2450 // left at the time of mmap(). This could be a potential
a61af66fc99e Initial load
duke
parents:
diff changeset
2451 // problem.
656
6bdd6923ba16 6541756: Reduce executable C-heap
coleenp
parents: 647
diff changeset
2452 bool os::commit_memory(char* addr, size_t size, bool exec) {
6bdd6923ba16 6541756: Reduce executable C-heap
coleenp
parents: 647
diff changeset
2453 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
6bdd6923ba16 6541756: Reduce executable C-heap
coleenp
parents: 647
diff changeset
2454 uintptr_t res = (uintptr_t) ::mmap(addr, size, prot,
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2455 MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
2456 return res != (uintptr_t) MAP_FAILED;
a61af66fc99e Initial load
duke
parents:
diff changeset
2457 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2458
656
6bdd6923ba16 6541756: Reduce executable C-heap
coleenp
parents: 647
diff changeset
2459 bool os::commit_memory(char* addr, size_t size, size_t alignment_hint,
6bdd6923ba16 6541756: Reduce executable C-heap
coleenp
parents: 647
diff changeset
2460 bool exec) {
6bdd6923ba16 6541756: Reduce executable C-heap
coleenp
parents: 647
diff changeset
2461 return commit_memory(addr, size, exec);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2462 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2463
a61af66fc99e Initial load
duke
parents:
diff changeset
2464 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { }
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2465
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2466 void os::free_memory(char *addr, size_t bytes) {
761
622212a69394 6838842: NUMA allocator: Segfault during startup on Linux
iveresov
parents: 691
diff changeset
2467 ::mmap(addr, bytes, PROT_READ | PROT_WRITE,
622212a69394 6838842: NUMA allocator: Segfault during startup on Linux
iveresov
parents: 691
diff changeset
2468 MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0);
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2469 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2470
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2471 void os::numa_make_global(char *addr, size_t bytes) {
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2472 Linux::numa_interleave_memory(addr, bytes);
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2473 }
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2474
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2475 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2476 Linux::numa_tonode_memory(addr, bytes, lgrp_hint);
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2477 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2478
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2479 bool os::numa_topology_changed() { return false; }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2480
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2481 size_t os::numa_get_groups_num() {
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2482 int max_node = Linux::numa_max_node();
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2483 return max_node > 0 ? max_node + 1 : 1;
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2484 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2485
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2486 int os::numa_get_group_id() {
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2487 int cpu_id = Linux::sched_getcpu();
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2488 if (cpu_id != -1) {
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2489 int lgrp_id = Linux::get_node_by_cpu(cpu_id);
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2490 if (lgrp_id != -1) {
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2491 return lgrp_id;
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2492 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2493 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2494 return 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2495 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2496
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2497 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2498 for (size_t i = 0; i < size; i++) {
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2499 ids[i] = i;
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2500 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2501 return size;
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2502 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2503
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2504 bool os::get_page_info(char *start, page_info* info) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2505 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
2506 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2507
a61af66fc99e Initial load
duke
parents:
diff changeset
2508 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2509 return end;
a61af66fc99e Initial load
duke
parents:
diff changeset
2510 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2511
2191
d70fe6ab4436 6588413: Use -fvisibility=hidden for gcc compiles
coleenp
parents: 2130
diff changeset
2512 // Something to do with the numa-aware allocator needs these symbols
d70fe6ab4436 6588413: Use -fvisibility=hidden for gcc compiles
coleenp
parents: 2130
diff changeset
2513 extern "C" JNIEXPORT void numa_warn(int number, char *where, ...) { }
d70fe6ab4436 6588413: Use -fvisibility=hidden for gcc compiles
coleenp
parents: 2130
diff changeset
2514 extern "C" JNIEXPORT void numa_error(char *where) { }
d70fe6ab4436 6588413: Use -fvisibility=hidden for gcc compiles
coleenp
parents: 2130
diff changeset
2515 extern "C" JNIEXPORT int fork1() { return fork(); }
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2516
763
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2517
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2518 // If we are running with libnuma version > 2, then we should
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2519 // be trying to use symbols with versions 1.1
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2520 // If we are running with earlier version, which did not have symbol versions,
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2521 // we should use the base version.
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2522 void* os::Linux::libnuma_dlsym(void* handle, const char *name) {
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2523 void *f = dlvsym(handle, name, "libnuma_1.1");
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2524 if (f == NULL) {
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2525 f = dlsym(handle, name);
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2526 }
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2527 return f;
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2528 }
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2529
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2530 bool os::Linux::libnuma_init() {
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2531 // sched_getcpu() should be in libc.
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2532 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t,
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2533 dlsym(RTLD_DEFAULT, "sched_getcpu")));
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2534
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2535 if (sched_getcpu() != -1) { // Does it work?
267
9d6a3a6891f8 6720130: NUMA allocator: The linux version should search for libnuma.so.1
iveresov
parents: 199
diff changeset
2536 void *handle = dlopen("libnuma.so.1", RTLD_LAZY);
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2537 if (handle != NULL) {
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2538 set_numa_node_to_cpus(CAST_TO_FN_PTR(numa_node_to_cpus_func_t,
763
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2539 libnuma_dlsym(handle, "numa_node_to_cpus")));
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2540 set_numa_max_node(CAST_TO_FN_PTR(numa_max_node_func_t,
763
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2541 libnuma_dlsym(handle, "numa_max_node")));
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2542 set_numa_available(CAST_TO_FN_PTR(numa_available_func_t,
763
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2543 libnuma_dlsym(handle, "numa_available")));
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2544 set_numa_tonode_memory(CAST_TO_FN_PTR(numa_tonode_memory_func_t,
763
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2545 libnuma_dlsym(handle, "numa_tonode_memory")));
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2546 set_numa_interleave_memory(CAST_TO_FN_PTR(numa_interleave_memory_func_t,
763
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2547 libnuma_dlsym(handle, "numa_interleave_memory")));
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2548
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2549
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2550 if (numa_available() != -1) {
763
cf71f149d7ae 6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents: 761
diff changeset
2551 set_numa_all_nodes((unsigned long*)libnuma_dlsym(handle, "numa_all_nodes"));
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2552 // Create a cpu -> node mapping
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2553 _cpu_to_node = new (ResourceObj::C_HEAP) GrowableArray<int>(0, true);
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2554 rebuild_cpu_to_node_map();
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2555 return true;
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2556 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2557 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2558 }
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2559 return false;
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2560 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2561
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2562 // rebuild_cpu_to_node_map() constructs a table mapping cpud id to node id.
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2563 // The table is later used in get_node_by_cpu().
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2564 void os::Linux::rebuild_cpu_to_node_map() {
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2565 const size_t NCPUS = 32768; // Since the buffer size computation is very obscure
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2566 // in libnuma (possible values are starting from 16,
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2567 // and continuing up with every other power of 2, but less
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2568 // than the maximum number of CPUs supported by kernel), and
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2569 // is a subject to change (in libnuma version 2 the requirements
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2570 // are more reasonable) we'll just hardcode the number they use
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2571 // in the library.
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2572 const size_t BitsPerCLong = sizeof(long) * CHAR_BIT;
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2573
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2574 size_t cpu_num = os::active_processor_count();
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2575 size_t cpu_map_size = NCPUS / BitsPerCLong;
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2576 size_t cpu_map_valid_size =
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2577 MIN2((cpu_num + BitsPerCLong - 1) / BitsPerCLong, cpu_map_size);
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2578
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2579 cpu_to_node()->clear();
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2580 cpu_to_node()->at_grow(cpu_num - 1);
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2581 size_t node_num = numa_get_groups_num();
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2582
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2583 unsigned long *cpu_map = NEW_C_HEAP_ARRAY(unsigned long, cpu_map_size);
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2584 for (size_t i = 0; i < node_num; i++) {
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2585 if (numa_node_to_cpus(i, cpu_map, cpu_map_size * sizeof(unsigned long)) != -1) {
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2586 for (size_t j = 0; j < cpu_map_valid_size; j++) {
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2587 if (cpu_map[j] != 0) {
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2588 for (size_t k = 0; k < BitsPerCLong; k++) {
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2589 if (cpu_map[j] & (1UL << k)) {
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2590 cpu_to_node()->at_put(j * BitsPerCLong + k, i);
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2591 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2592 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2593 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2594 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2595 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2596 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2597 FREE_C_HEAP_ARRAY(unsigned long, cpu_map);
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2598 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2599
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2600 int os::Linux::get_node_by_cpu(int cpu_id) {
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2601 if (cpu_to_node() != NULL && cpu_id >= 0 && cpu_id < cpu_to_node()->length()) {
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2602 return cpu_to_node()->at(cpu_id);
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2603 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2604 return -1;
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2605 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2606
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2607 GrowableArray<int>* os::Linux::_cpu_to_node;
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2608 os::Linux::sched_getcpu_func_t os::Linux::_sched_getcpu;
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2609 os::Linux::numa_node_to_cpus_func_t os::Linux::_numa_node_to_cpus;
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2610 os::Linux::numa_max_node_func_t os::Linux::_numa_max_node;
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2611 os::Linux::numa_available_func_t os::Linux::_numa_available;
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2612 os::Linux::numa_tonode_memory_func_t os::Linux::_numa_tonode_memory;
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2613 os::Linux::numa_interleave_memory_func_t os::Linux::_numa_interleave_memory;
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
2614 unsigned long* os::Linux::_numa_all_nodes;
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
2615
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2616 bool os::uncommit_memory(char* addr, size_t size) {
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2617 uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE,
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2618 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0);
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2619 return res != (uintptr_t) MAP_FAILED;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2620 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2621
1320
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2622 // Linux uses a growable mapping for the stack, and if the mapping for
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2623 // the stack guard pages is not removed when we detach a thread the
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2624 // stack cannot grow beyond the pages where the stack guard was
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2625 // mapped. If at some point later in the process the stack expands to
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2626 // that point, the Linux kernel cannot expand the stack any further
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2627 // because the guard pages are in the way, and a segfault occurs.
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2628 //
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2629 // However, it's essential not to split the stack region by unmapping
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2630 // a region (leaving a hole) that's already part of the stack mapping,
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2631 // so if the stack mapping has already grown beyond the guard pages at
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2632 // the time we create them, we have to truncate the stack mapping.
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2633 // So, we need to know the extent of the stack mapping when
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2634 // create_stack_guard_pages() is called.
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2635
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2636 // Find the bounds of the stack mapping. Return true for success.
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2637 //
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2638 // We only need this for stacks that are growable: at the time of
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2639 // writing thread stacks don't use growable mappings (i.e. those
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2640 // creeated with MAP_GROWSDOWN), and aren't marked "[stack]", so this
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2641 // only applies to the main thread.
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2642 static bool
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2643 get_stack_bounds(uintptr_t *bottom, uintptr_t *top)
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2644 {
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2645 FILE *f = fopen("/proc/self/maps", "r");
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2646 if (f == NULL)
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2647 return false;
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2648
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2649 while (!feof(f)) {
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2650 size_t dummy;
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2651 char *str = NULL;
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2652 ssize_t len = getline(&str, &dummy, f);
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2653 if (len == -1) {
1325
98ba8ca25feb 6936168: Recent fix for unmapping stack guard pages doesn't close /proc/self/maps
coleenp
parents: 1320
diff changeset
2654 fclose(f);
1320
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2655 return false;
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2656 }
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2657
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2658 if (len > 0 && str[len-1] == '\n') {
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2659 str[len-1] = 0;
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2660 len--;
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2661 }
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2662
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2663 static const char *stack_str = "[stack]";
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2664 if (len > (ssize_t)strlen(stack_str)
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2665 && (strcmp(str + len - strlen(stack_str), stack_str) == 0)) {
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2666 if (sscanf(str, "%" SCNxPTR "-%" SCNxPTR, bottom, top) == 2) {
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2667 uintptr_t sp = (uintptr_t)__builtin_frame_address(0);
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2668 if (sp >= *bottom && sp <= *top) {
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2669 free(str);
1325
98ba8ca25feb 6936168: Recent fix for unmapping stack guard pages doesn't close /proc/self/maps
coleenp
parents: 1320
diff changeset
2670 fclose(f);
1320
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2671 return true;
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2672 }
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2673 }
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2674 }
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2675 free(str);
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2676 }
1325
98ba8ca25feb 6936168: Recent fix for unmapping stack guard pages doesn't close /proc/self/maps
coleenp
parents: 1320
diff changeset
2677 fclose(f);
1320
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2678 return false;
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2679 }
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2680
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2681 // If the (growable) stack mapping already extends beyond the point
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2682 // where we're going to put our guard pages, truncate the mapping at
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2683 // that point by munmap()ping it. This ensures that when we later
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2684 // munmap() the guard pages we don't leave a hole in the stack
1750
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2685 // mapping. This only affects the main/initial thread, but guard
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2686 // against future OS changes
1320
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2687 bool os::create_stack_guard_pages(char* addr, size_t size) {
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2688 uintptr_t stack_extent, stack_base;
1750
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2689 bool chk_bounds = NOT_DEBUG(os::Linux::is_initial_thread()) DEBUG_ONLY(true);
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2690 if (chk_bounds && get_stack_bounds(&stack_extent, &stack_base)) {
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2691 assert(os::Linux::is_initial_thread(),
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2692 "growable stack in non-initial thread");
1320
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2693 if (stack_extent < (uintptr_t)addr)
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2694 ::munmap((void*)stack_extent, (uintptr_t)addr - stack_extent);
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2695 }
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2696
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2697 return os::commit_memory(addr, size);
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2698 }
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2699
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2700 // If this is a growable mapping, remove the guard pages entirely by
1750
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2701 // munmap()ping them. If not, just call uncommit_memory(). This only
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2702 // affects the main/initial thread, but guard against future OS changes
1320
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2703 bool os::remove_stack_guard_pages(char* addr, size_t size) {
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2704 uintptr_t stack_extent, stack_base;
1750
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2705 bool chk_bounds = NOT_DEBUG(os::Linux::is_initial_thread()) DEBUG_ONLY(true);
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2706 if (chk_bounds && get_stack_bounds(&stack_extent, &stack_base)) {
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2707 assert(os::Linux::is_initial_thread(),
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2708 "growable stack in non-initial thread");
c7004d700b49 6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents: 1681
diff changeset
2709
1320
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2710 return ::munmap(addr, size) == 0;
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2711 }
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2712
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2713 return os::uncommit_memory(addr, size);
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2714 }
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1123
diff changeset
2715
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2716 static address _highest_vm_reserved_address = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2717
a61af66fc99e Initial load
duke
parents:
diff changeset
2718 // If 'fixed' is true, anon_mmap() will attempt to reserve anonymous memory
a61af66fc99e Initial load
duke
parents:
diff changeset
2719 // at 'requested_addr'. If there are existing memory mappings at the same
a61af66fc99e Initial load
duke
parents:
diff changeset
2720 // location, however, they will be overwritten. If 'fixed' is false,
a61af66fc99e Initial load
duke
parents:
diff changeset
2721 // 'requested_addr' is only treated as a hint, the return value may or
a61af66fc99e Initial load
duke
parents:
diff changeset
2722 // may not start from the requested address. Unlike Linux mmap(), this
a61af66fc99e Initial load
duke
parents:
diff changeset
2723 // function returns NULL to indicate failure.
a61af66fc99e Initial load
duke
parents:
diff changeset
2724 static char* anon_mmap(char* requested_addr, size_t bytes, bool fixed) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2725 char * addr;
a61af66fc99e Initial load
duke
parents:
diff changeset
2726 int flags;
a61af66fc99e Initial load
duke
parents:
diff changeset
2727
a61af66fc99e Initial load
duke
parents:
diff changeset
2728 flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS;
a61af66fc99e Initial load
duke
parents:
diff changeset
2729 if (fixed) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2730 assert((uintptr_t)requested_addr % os::Linux::page_size() == 0, "unaligned address");
a61af66fc99e Initial load
duke
parents:
diff changeset
2731 flags |= MAP_FIXED;
a61af66fc99e Initial load
duke
parents:
diff changeset
2732 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2733
656
6bdd6923ba16 6541756: Reduce executable C-heap
coleenp
parents: 647
diff changeset
2734 // Map uncommitted pages PROT_READ and PROT_WRITE, change access
6bdd6923ba16 6541756: Reduce executable C-heap
coleenp
parents: 647
diff changeset
2735 // to PROT_EXEC if executable when we commit the page.
6bdd6923ba16 6541756: Reduce executable C-heap
coleenp
parents: 647
diff changeset
2736 addr = (char*)::mmap(requested_addr, bytes, PROT_READ|PROT_WRITE,
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2737 flags, -1, 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
2738
a61af66fc99e Initial load
duke
parents:
diff changeset
2739 if (addr != MAP_FAILED) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2740 // anon_mmap() should only get called during VM initialization,
a61af66fc99e Initial load
duke
parents:
diff changeset
2741 // don't need lock (actually we can skip locking even it can be called
a61af66fc99e Initial load
duke
parents:
diff changeset
2742 // from multiple threads, because _highest_vm_reserved_address is just a
a61af66fc99e Initial load
duke
parents:
diff changeset
2743 // hint about the upper limit of non-stack memory regions.)
a61af66fc99e Initial load
duke
parents:
diff changeset
2744 if ((address)addr + bytes > _highest_vm_reserved_address) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2745 _highest_vm_reserved_address = (address)addr + bytes;
a61af66fc99e Initial load
duke
parents:
diff changeset
2746 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2747 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2748
a61af66fc99e Initial load
duke
parents:
diff changeset
2749 return addr == MAP_FAILED ? NULL : addr;
a61af66fc99e Initial load
duke
parents:
diff changeset
2750 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2751
a61af66fc99e Initial load
duke
parents:
diff changeset
2752 // Don't update _highest_vm_reserved_address, because there might be memory
a61af66fc99e Initial load
duke
parents:
diff changeset
2753 // regions above addr + size. If so, releasing a memory region only creates
a61af66fc99e Initial load
duke
parents:
diff changeset
2754 // a hole in the address space, it doesn't help prevent heap-stack collision.
a61af66fc99e Initial load
duke
parents:
diff changeset
2755 //
a61af66fc99e Initial load
duke
parents:
diff changeset
2756 static int anon_munmap(char * addr, size_t size) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2757 return ::munmap(addr, size) == 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2758 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2759
a61af66fc99e Initial load
duke
parents:
diff changeset
2760 char* os::reserve_memory(size_t bytes, char* requested_addr,
a61af66fc99e Initial load
duke
parents:
diff changeset
2761 size_t alignment_hint) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2762 return anon_mmap(requested_addr, bytes, (requested_addr != NULL));
a61af66fc99e Initial load
duke
parents:
diff changeset
2763 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2764
a61af66fc99e Initial load
duke
parents:
diff changeset
2765 bool os::release_memory(char* addr, size_t size) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2766 return anon_munmap(addr, size);
a61af66fc99e Initial load
duke
parents:
diff changeset
2767 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2768
a61af66fc99e Initial load
duke
parents:
diff changeset
2769 static address highest_vm_reserved_address() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2770 return _highest_vm_reserved_address;
a61af66fc99e Initial load
duke
parents:
diff changeset
2771 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2772
a61af66fc99e Initial load
duke
parents:
diff changeset
2773 static bool linux_mprotect(char* addr, size_t size, int prot) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2774 // Linux wants the mprotect address argument to be page aligned.
a61af66fc99e Initial load
duke
parents:
diff changeset
2775 char* bottom = (char*)align_size_down((intptr_t)addr, os::Linux::page_size());
a61af66fc99e Initial load
duke
parents:
diff changeset
2776
a61af66fc99e Initial load
duke
parents:
diff changeset
2777 // According to SUSv3, mprotect() should only be used with mappings
a61af66fc99e Initial load
duke
parents:
diff changeset
2778 // established by mmap(), and mmap() always maps whole pages. Unaligned
a61af66fc99e Initial load
duke
parents:
diff changeset
2779 // 'addr' likely indicates problem in the VM (e.g. trying to change
a61af66fc99e Initial load
duke
parents:
diff changeset
2780 // protection of malloc'ed or statically allocated memory). Check the
a61af66fc99e Initial load
duke
parents:
diff changeset
2781 // caller if you hit this assert.
a61af66fc99e Initial load
duke
parents:
diff changeset
2782 assert(addr == bottom, "sanity check");
a61af66fc99e Initial load
duke
parents:
diff changeset
2783
a61af66fc99e Initial load
duke
parents:
diff changeset
2784 size = align_size_up(pointer_delta(addr, bottom, 1) + size, os::Linux::page_size());
a61af66fc99e Initial load
duke
parents:
diff changeset
2785 return ::mprotect(bottom, size, prot) == 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2786 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2787
237
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2788 // Set protections specified
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2789 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2790 bool is_committed) {
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2791 unsigned int p = 0;
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2792 switch (prot) {
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2793 case MEM_PROT_NONE: p = PROT_NONE; break;
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2794 case MEM_PROT_READ: p = PROT_READ; break;
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2795 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2796 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2797 default:
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2798 ShouldNotReachHere();
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2799 }
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2800 // is_committed is unused.
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
2801 return linux_mprotect(addr, bytes, p);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2802 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2803
a61af66fc99e Initial load
duke
parents:
diff changeset
2804 bool os::guard_memory(char* addr, size_t size) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2805 return linux_mprotect(addr, size, PROT_NONE);
a61af66fc99e Initial load
duke
parents:
diff changeset
2806 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2807
a61af66fc99e Initial load
duke
parents:
diff changeset
2808 bool os::unguard_memory(char* addr, size_t size) {
477
24fda36852ce 6727377: VM stack guard pages on Windows should PAGE_READWRITE not PAGE_EXECUTE_READWRITE
coleenp
parents: 462
diff changeset
2809 return linux_mprotect(addr, size, PROT_READ|PROT_WRITE);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2810 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2811
a61af66fc99e Initial load
duke
parents:
diff changeset
2812 // Large page support
a61af66fc99e Initial load
duke
parents:
diff changeset
2813
a61af66fc99e Initial load
duke
parents:
diff changeset
2814 static size_t _large_page_size = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2815
a61af66fc99e Initial load
duke
parents:
diff changeset
2816 bool os::large_page_init() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2817 if (!UseLargePages) return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
2818
a61af66fc99e Initial load
duke
parents:
diff changeset
2819 if (LargePageSizeInBytes) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2820 _large_page_size = LargePageSizeInBytes;
a61af66fc99e Initial load
duke
parents:
diff changeset
2821 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2822 // large_page_size on Linux is used to round up heap size. x86 uses either
a61af66fc99e Initial load
duke
parents:
diff changeset
2823 // 2M or 4M page, depending on whether PAE (Physical Address Extensions)
a61af66fc99e Initial load
duke
parents:
diff changeset
2824 // mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. IA64 can use
a61af66fc99e Initial load
duke
parents:
diff changeset
2825 // page as large as 256M.
a61af66fc99e Initial load
duke
parents:
diff changeset
2826 //
a61af66fc99e Initial load
duke
parents:
diff changeset
2827 // Here we try to figure out page size by parsing /proc/meminfo and looking
a61af66fc99e Initial load
duke
parents:
diff changeset
2828 // for a line with the following format:
a61af66fc99e Initial load
duke
parents:
diff changeset
2829 // Hugepagesize: 2048 kB
a61af66fc99e Initial load
duke
parents:
diff changeset
2830 //
a61af66fc99e Initial load
duke
parents:
diff changeset
2831 // If we can't determine the value (e.g. /proc is not mounted, or the text
a61af66fc99e Initial load
duke
parents:
diff changeset
2832 // format has been changed), we'll use the largest page size supported by
a61af66fc99e Initial load
duke
parents:
diff changeset
2833 // the processor.
a61af66fc99e Initial load
duke
parents:
diff changeset
2834
1010
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
2835 #ifndef ZERO
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2836 _large_page_size = IA32_ONLY(4 * M) AMD64_ONLY(2 * M) IA64_ONLY(256 * M) SPARC_ONLY(4 * M)
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
2837 ARM_ONLY(2 * M) PPC_ONLY(4 * M);
1010
354d3184f6b2 6890308: integrate zero assembler hotspot changes
never
parents: 763
diff changeset
2838 #endif // ZERO
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2839
a61af66fc99e Initial load
duke
parents:
diff changeset
2840 FILE *fp = fopen("/proc/meminfo", "r");
a61af66fc99e Initial load
duke
parents:
diff changeset
2841 if (fp) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2842 while (!feof(fp)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2843 int x = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2844 char buf[16];
a61af66fc99e Initial load
duke
parents:
diff changeset
2845 if (fscanf(fp, "Hugepagesize: %d", &x) == 1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2846 if (x && fgets(buf, sizeof(buf), fp) && strcmp(buf, " kB\n") == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2847 _large_page_size = x * K;
a61af66fc99e Initial load
duke
parents:
diff changeset
2848 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2849 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2850 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2851 // skip to next line
a61af66fc99e Initial load
duke
parents:
diff changeset
2852 for (;;) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2853 int ch = fgetc(fp);
a61af66fc99e Initial load
duke
parents:
diff changeset
2854 if (ch == EOF || ch == (int)'\n') break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2855 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2856 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2857 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2858 fclose(fp);
a61af66fc99e Initial load
duke
parents:
diff changeset
2859 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2860 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2861
a61af66fc99e Initial load
duke
parents:
diff changeset
2862 const size_t default_page_size = (size_t)Linux::page_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
2863 if (_large_page_size > default_page_size) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2864 _page_sizes[0] = _large_page_size;
a61af66fc99e Initial load
duke
parents:
diff changeset
2865 _page_sizes[1] = default_page_size;
a61af66fc99e Initial load
duke
parents:
diff changeset
2866 _page_sizes[2] = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2867 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2868
a61af66fc99e Initial load
duke
parents:
diff changeset
2869 // Large page support is available on 2.6 or newer kernel, some vendors
a61af66fc99e Initial load
duke
parents:
diff changeset
2870 // (e.g. Redhat) have backported it to their 2.4 based distributions.
a61af66fc99e Initial load
duke
parents:
diff changeset
2871 // We optimistically assume the support is available. If later it turns out
a61af66fc99e Initial load
duke
parents:
diff changeset
2872 // not true, VM will automatically switch to use regular page size.
a61af66fc99e Initial load
duke
parents:
diff changeset
2873 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
2874 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2875
a61af66fc99e Initial load
duke
parents:
diff changeset
2876 #ifndef SHM_HUGETLB
a61af66fc99e Initial load
duke
parents:
diff changeset
2877 #define SHM_HUGETLB 04000
a61af66fc99e Initial load
duke
parents:
diff changeset
2878 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
2879
656
6bdd6923ba16 6541756: Reduce executable C-heap
coleenp
parents: 647
diff changeset
2880 char* os::reserve_memory_special(size_t bytes, char* req_addr, bool exec) {
6bdd6923ba16 6541756: Reduce executable C-heap
coleenp
parents: 647
diff changeset
2881 // "exec" is passed in but not used. Creating the shared image for
6bdd6923ba16 6541756: Reduce executable C-heap
coleenp
parents: 647
diff changeset
2882 // the code cache doesn't have an SHM_X executable permission to check.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2883 assert(UseLargePages, "only for large pages");
a61af66fc99e Initial load
duke
parents:
diff changeset
2884
a61af66fc99e Initial load
duke
parents:
diff changeset
2885 key_t key = IPC_PRIVATE;
a61af66fc99e Initial load
duke
parents:
diff changeset
2886 char *addr;
a61af66fc99e Initial load
duke
parents:
diff changeset
2887
a61af66fc99e Initial load
duke
parents:
diff changeset
2888 bool warn_on_failure = UseLargePages &&
a61af66fc99e Initial load
duke
parents:
diff changeset
2889 (!FLAG_IS_DEFAULT(UseLargePages) ||
a61af66fc99e Initial load
duke
parents:
diff changeset
2890 !FLAG_IS_DEFAULT(LargePageSizeInBytes)
a61af66fc99e Initial load
duke
parents:
diff changeset
2891 );
a61af66fc99e Initial load
duke
parents:
diff changeset
2892 char msg[128];
a61af66fc99e Initial load
duke
parents:
diff changeset
2893
a61af66fc99e Initial load
duke
parents:
diff changeset
2894 // Create a large shared memory region to attach to based on size.
a61af66fc99e Initial load
duke
parents:
diff changeset
2895 // Currently, size is the total size of the heap
a61af66fc99e Initial load
duke
parents:
diff changeset
2896 int shmid = shmget(key, bytes, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W);
a61af66fc99e Initial load
duke
parents:
diff changeset
2897 if (shmid == -1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2898 // Possible reasons for shmget failure:
a61af66fc99e Initial load
duke
parents:
diff changeset
2899 // 1. shmmax is too small for Java heap.
a61af66fc99e Initial load
duke
parents:
diff changeset
2900 // > check shmmax value: cat /proc/sys/kernel/shmmax
a61af66fc99e Initial load
duke
parents:
diff changeset
2901 // > increase shmmax value: echo "0xffffffff" > /proc/sys/kernel/shmmax
a61af66fc99e Initial load
duke
parents:
diff changeset
2902 // 2. not enough large page memory.
a61af66fc99e Initial load
duke
parents:
diff changeset
2903 // > check available large pages: cat /proc/meminfo
a61af66fc99e Initial load
duke
parents:
diff changeset
2904 // > increase amount of large pages:
a61af66fc99e Initial load
duke
parents:
diff changeset
2905 // echo new_value > /proc/sys/vm/nr_hugepages
a61af66fc99e Initial load
duke
parents:
diff changeset
2906 // Note 1: different Linux may use different name for this property,
a61af66fc99e Initial load
duke
parents:
diff changeset
2907 // e.g. on Redhat AS-3 it is "hugetlb_pool".
a61af66fc99e Initial load
duke
parents:
diff changeset
2908 // Note 2: it's possible there's enough physical memory available but
a61af66fc99e Initial load
duke
parents:
diff changeset
2909 // they are so fragmented after a long run that they can't
a61af66fc99e Initial load
duke
parents:
diff changeset
2910 // coalesce into large pages. Try to reserve large pages when
a61af66fc99e Initial load
duke
parents:
diff changeset
2911 // the system is still "fresh".
a61af66fc99e Initial load
duke
parents:
diff changeset
2912 if (warn_on_failure) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2913 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno);
a61af66fc99e Initial load
duke
parents:
diff changeset
2914 warning(msg);
a61af66fc99e Initial load
duke
parents:
diff changeset
2915 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2916 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2917 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2918
a61af66fc99e Initial load
duke
parents:
diff changeset
2919 // attach to the region
1537
79bf863697eb 6951686: Using large pages on Linux prevents zero based compressed oops
kvn
parents: 1500
diff changeset
2920 addr = (char*)shmat(shmid, req_addr, 0);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2921 int err = errno;
a61af66fc99e Initial load
duke
parents:
diff changeset
2922
a61af66fc99e Initial load
duke
parents:
diff changeset
2923 // Remove shmid. If shmat() is successful, the actual shared memory segment
a61af66fc99e Initial load
duke
parents:
diff changeset
2924 // will be deleted when it's detached by shmdt() or when the process
a61af66fc99e Initial load
duke
parents:
diff changeset
2925 // terminates. If shmat() is not successful this will remove the shared
a61af66fc99e Initial load
duke
parents:
diff changeset
2926 // segment immediately.
a61af66fc99e Initial load
duke
parents:
diff changeset
2927 shmctl(shmid, IPC_RMID, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
2928
a61af66fc99e Initial load
duke
parents:
diff changeset
2929 if ((intptr_t)addr == -1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2930 if (warn_on_failure) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2931 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err);
a61af66fc99e Initial load
duke
parents:
diff changeset
2932 warning(msg);
a61af66fc99e Initial load
duke
parents:
diff changeset
2933 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2934 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2935 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2936
a61af66fc99e Initial load
duke
parents:
diff changeset
2937 return addr;
a61af66fc99e Initial load
duke
parents:
diff changeset
2938 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2939
a61af66fc99e Initial load
duke
parents:
diff changeset
2940 bool os::release_memory_special(char* base, size_t bytes) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2941 // detaching the SHM segment will also delete it, see reserve_memory_special()
a61af66fc99e Initial load
duke
parents:
diff changeset
2942 int rslt = shmdt(base);
a61af66fc99e Initial load
duke
parents:
diff changeset
2943 return rslt == 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2944 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2945
a61af66fc99e Initial load
duke
parents:
diff changeset
2946 size_t os::large_page_size() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2947 return _large_page_size;
a61af66fc99e Initial load
duke
parents:
diff changeset
2948 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2949
a61af66fc99e Initial load
duke
parents:
diff changeset
2950 // Linux does not support anonymous mmap with large page memory. The only way
a61af66fc99e Initial load
duke
parents:
diff changeset
2951 // to reserve large page memory without file backing is through SysV shared
a61af66fc99e Initial load
duke
parents:
diff changeset
2952 // memory API. The entire memory region is committed and pinned upfront.
a61af66fc99e Initial load
duke
parents:
diff changeset
2953 // Hopefully this will change in the future...
a61af66fc99e Initial load
duke
parents:
diff changeset
2954 bool os::can_commit_large_page_memory() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2955 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
2956 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2957
79
82db0859acbe 6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents: 62
diff changeset
2958 bool os::can_execute_large_page_memory() {
82db0859acbe 6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents: 62
diff changeset
2959 return false;
82db0859acbe 6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents: 62
diff changeset
2960 }
82db0859acbe 6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents: 62
diff changeset
2961
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2962 // Reserve memory at an arbitrary address, only if that area is
a61af66fc99e Initial load
duke
parents:
diff changeset
2963 // available (and not reserved for something else).
a61af66fc99e Initial load
duke
parents:
diff changeset
2964
a61af66fc99e Initial load
duke
parents:
diff changeset
2965 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2966 const int max_tries = 10;
a61af66fc99e Initial load
duke
parents:
diff changeset
2967 char* base[max_tries];
a61af66fc99e Initial load
duke
parents:
diff changeset
2968 size_t size[max_tries];
a61af66fc99e Initial load
duke
parents:
diff changeset
2969 const size_t gap = 0x000000;
a61af66fc99e Initial load
duke
parents:
diff changeset
2970
a61af66fc99e Initial load
duke
parents:
diff changeset
2971 // Assert only that the size is a multiple of the page size, since
a61af66fc99e Initial load
duke
parents:
diff changeset
2972 // that's all that mmap requires, and since that's all we really know
a61af66fc99e Initial load
duke
parents:
diff changeset
2973 // about at this low abstraction level. If we need higher alignment,
a61af66fc99e Initial load
duke
parents:
diff changeset
2974 // we can either pass an alignment to this method or verify alignment
a61af66fc99e Initial load
duke
parents:
diff changeset
2975 // in one of the methods further up the call chain. See bug 5044738.
a61af66fc99e Initial load
duke
parents:
diff changeset
2976 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
a61af66fc99e Initial load
duke
parents:
diff changeset
2977
a61af66fc99e Initial load
duke
parents:
diff changeset
2978 // Repeatedly allocate blocks until the block is allocated at the
a61af66fc99e Initial load
duke
parents:
diff changeset
2979 // right spot. Give up after max_tries. Note that reserve_memory() will
a61af66fc99e Initial load
duke
parents:
diff changeset
2980 // automatically update _highest_vm_reserved_address if the call is
a61af66fc99e Initial load
duke
parents:
diff changeset
2981 // successful. The variable tracks the highest memory address every reserved
a61af66fc99e Initial load
duke
parents:
diff changeset
2982 // by JVM. It is used to detect heap-stack collision if running with
a61af66fc99e Initial load
duke
parents:
diff changeset
2983 // fixed-stack LinuxThreads. Because here we may attempt to reserve more
a61af66fc99e Initial load
duke
parents:
diff changeset
2984 // space than needed, it could confuse the collision detecting code. To
a61af66fc99e Initial load
duke
parents:
diff changeset
2985 // solve the problem, save current _highest_vm_reserved_address and
a61af66fc99e Initial load
duke
parents:
diff changeset
2986 // calculate the correct value before return.
a61af66fc99e Initial load
duke
parents:
diff changeset
2987 address old_highest = _highest_vm_reserved_address;
a61af66fc99e Initial load
duke
parents:
diff changeset
2988
a61af66fc99e Initial load
duke
parents:
diff changeset
2989 // Linux mmap allows caller to pass an address as hint; give it a try first,
a61af66fc99e Initial load
duke
parents:
diff changeset
2990 // if kernel honors the hint then we can return immediately.
a61af66fc99e Initial load
duke
parents:
diff changeset
2991 char * addr = anon_mmap(requested_addr, bytes, false);
a61af66fc99e Initial load
duke
parents:
diff changeset
2992 if (addr == requested_addr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2993 return requested_addr;
a61af66fc99e Initial load
duke
parents:
diff changeset
2994 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2995
a61af66fc99e Initial load
duke
parents:
diff changeset
2996 if (addr != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2997 // mmap() is successful but it fails to reserve at the requested address
a61af66fc99e Initial load
duke
parents:
diff changeset
2998 anon_munmap(addr, bytes);
a61af66fc99e Initial load
duke
parents:
diff changeset
2999 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3000
a61af66fc99e Initial load
duke
parents:
diff changeset
3001 int i;
a61af66fc99e Initial load
duke
parents:
diff changeset
3002 for (i = 0; i < max_tries; ++i) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3003 base[i] = reserve_memory(bytes);
a61af66fc99e Initial load
duke
parents:
diff changeset
3004
a61af66fc99e Initial load
duke
parents:
diff changeset
3005 if (base[i] != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3006 // Is this the block we wanted?
a61af66fc99e Initial load
duke
parents:
diff changeset
3007 if (base[i] == requested_addr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3008 size[i] = bytes;
a61af66fc99e Initial load
duke
parents:
diff changeset
3009 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
3010 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3011
a61af66fc99e Initial load
duke
parents:
diff changeset
3012 // Does this overlap the block we wanted? Give back the overlapped
a61af66fc99e Initial load
duke
parents:
diff changeset
3013 // parts and try again.
a61af66fc99e Initial load
duke
parents:
diff changeset
3014
a61af66fc99e Initial load
duke
parents:
diff changeset
3015 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
a61af66fc99e Initial load
duke
parents:
diff changeset
3016 if (top_overlap >= 0 && top_overlap < bytes) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3017 unmap_memory(base[i], top_overlap);
a61af66fc99e Initial load
duke
parents:
diff changeset
3018 base[i] += top_overlap;
a61af66fc99e Initial load
duke
parents:
diff changeset
3019 size[i] = bytes - top_overlap;
a61af66fc99e Initial load
duke
parents:
diff changeset
3020 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3021 size_t bottom_overlap = base[i] + bytes - requested_addr;
a61af66fc99e Initial load
duke
parents:
diff changeset
3022 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3023 unmap_memory(requested_addr, bottom_overlap);
a61af66fc99e Initial load
duke
parents:
diff changeset
3024 size[i] = bytes - bottom_overlap;
a61af66fc99e Initial load
duke
parents:
diff changeset
3025 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3026 size[i] = bytes;
a61af66fc99e Initial load
duke
parents:
diff changeset
3027 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3028 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3029 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3030 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3031
a61af66fc99e Initial load
duke
parents:
diff changeset
3032 // Give back the unused reserved pieces.
a61af66fc99e Initial load
duke
parents:
diff changeset
3033
a61af66fc99e Initial load
duke
parents:
diff changeset
3034 for (int j = 0; j < i; ++j) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3035 if (base[j] != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3036 unmap_memory(base[j], size[j]);
a61af66fc99e Initial load
duke
parents:
diff changeset
3037 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3038 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3039
a61af66fc99e Initial load
duke
parents:
diff changeset
3040 if (i < max_tries) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3041 _highest_vm_reserved_address = MAX2(old_highest, (address)requested_addr + bytes);
a61af66fc99e Initial load
duke
parents:
diff changeset
3042 return requested_addr;
a61af66fc99e Initial load
duke
parents:
diff changeset
3043 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3044 _highest_vm_reserved_address = old_highest;
a61af66fc99e Initial load
duke
parents:
diff changeset
3045 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3046 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3047 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3048
a61af66fc99e Initial load
duke
parents:
diff changeset
3049 size_t os::read(int fd, void *buf, unsigned int nBytes) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3050 return ::read(fd, buf, nBytes);
a61af66fc99e Initial load
duke
parents:
diff changeset
3051 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3052
a61af66fc99e Initial load
duke
parents:
diff changeset
3053 // TODO-FIXME: reconcile Solaris' os::sleep with the linux variation.
a61af66fc99e Initial load
duke
parents:
diff changeset
3054 // Solaris uses poll(), linux uses park().
a61af66fc99e Initial load
duke
parents:
diff changeset
3055 // Poll() is likely a better choice, assuming that Thread.interrupt()
a61af66fc99e Initial load
duke
parents:
diff changeset
3056 // generates a SIGUSRx signal. Note that SIGUSR1 can interfere with
a61af66fc99e Initial load
duke
parents:
diff changeset
3057 // SIGSEGV, see 4355769.
a61af66fc99e Initial load
duke
parents:
diff changeset
3058
a61af66fc99e Initial load
duke
parents:
diff changeset
3059 const int NANOSECS_PER_MILLISECS = 1000000;
a61af66fc99e Initial load
duke
parents:
diff changeset
3060
a61af66fc99e Initial load
duke
parents:
diff changeset
3061 int os::sleep(Thread* thread, jlong millis, bool interruptible) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3062 assert(thread == Thread::current(), "thread consistency check");
a61af66fc99e Initial load
duke
parents:
diff changeset
3063
a61af66fc99e Initial load
duke
parents:
diff changeset
3064 ParkEvent * const slp = thread->_SleepEvent ;
a61af66fc99e Initial load
duke
parents:
diff changeset
3065 slp->reset() ;
a61af66fc99e Initial load
duke
parents:
diff changeset
3066 OrderAccess::fence() ;
a61af66fc99e Initial load
duke
parents:
diff changeset
3067
a61af66fc99e Initial load
duke
parents:
diff changeset
3068 if (interruptible) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3069 jlong prevtime = javaTimeNanos();
a61af66fc99e Initial load
duke
parents:
diff changeset
3070
a61af66fc99e Initial load
duke
parents:
diff changeset
3071 for (;;) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3072 if (os::is_interrupted(thread, true)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3073 return OS_INTRPT;
a61af66fc99e Initial load
duke
parents:
diff changeset
3074 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3075
a61af66fc99e Initial load
duke
parents:
diff changeset
3076 jlong newtime = javaTimeNanos();
a61af66fc99e Initial load
duke
parents:
diff changeset
3077
a61af66fc99e Initial load
duke
parents:
diff changeset
3078 if (newtime - prevtime < 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3079 // time moving backwards, should only happen if no monotonic clock
a61af66fc99e Initial load
duke
parents:
diff changeset
3080 // not a guarantee() because JVM should not abort on kernel/glibc bugs
a61af66fc99e Initial load
duke
parents:
diff changeset
3081 assert(!Linux::supports_monotonic_clock(), "time moving backwards");
a61af66fc99e Initial load
duke
parents:
diff changeset
3082 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3083 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISECS;
a61af66fc99e Initial load
duke
parents:
diff changeset
3084 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3085
a61af66fc99e Initial load
duke
parents:
diff changeset
3086 if(millis <= 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3087 return OS_OK;
a61af66fc99e Initial load
duke
parents:
diff changeset
3088 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3089
a61af66fc99e Initial load
duke
parents:
diff changeset
3090 prevtime = newtime;
a61af66fc99e Initial load
duke
parents:
diff changeset
3091
a61af66fc99e Initial load
duke
parents:
diff changeset
3092 {
a61af66fc99e Initial load
duke
parents:
diff changeset
3093 assert(thread->is_Java_thread(), "sanity check");
a61af66fc99e Initial load
duke
parents:
diff changeset
3094 JavaThread *jt = (JavaThread *) thread;
a61af66fc99e Initial load
duke
parents:
diff changeset
3095 ThreadBlockInVM tbivm(jt);
a61af66fc99e Initial load
duke
parents:
diff changeset
3096 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
a61af66fc99e Initial load
duke
parents:
diff changeset
3097
a61af66fc99e Initial load
duke
parents:
diff changeset
3098 jt->set_suspend_equivalent();
a61af66fc99e Initial load
duke
parents:
diff changeset
3099 // cleared by handle_special_suspend_equivalent_condition() or
a61af66fc99e Initial load
duke
parents:
diff changeset
3100 // java_suspend_self() via check_and_wait_while_suspended()
a61af66fc99e Initial load
duke
parents:
diff changeset
3101
a61af66fc99e Initial load
duke
parents:
diff changeset
3102 slp->park(millis);
a61af66fc99e Initial load
duke
parents:
diff changeset
3103
a61af66fc99e Initial load
duke
parents:
diff changeset
3104 // were we externally suspended while we were waiting?
a61af66fc99e Initial load
duke
parents:
diff changeset
3105 jt->check_and_wait_while_suspended();
a61af66fc99e Initial load
duke
parents:
diff changeset
3106 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3107 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3108 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3109 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
a61af66fc99e Initial load
duke
parents:
diff changeset
3110 jlong prevtime = javaTimeNanos();
a61af66fc99e Initial load
duke
parents:
diff changeset
3111
a61af66fc99e Initial load
duke
parents:
diff changeset
3112 for (;;) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3113 // It'd be nice to avoid the back-to-back javaTimeNanos() calls on
a61af66fc99e Initial load
duke
parents:
diff changeset
3114 // the 1st iteration ...
a61af66fc99e Initial load
duke
parents:
diff changeset
3115 jlong newtime = javaTimeNanos();
a61af66fc99e Initial load
duke
parents:
diff changeset
3116
a61af66fc99e Initial load
duke
parents:
diff changeset
3117 if (newtime - prevtime < 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3118 // time moving backwards, should only happen if no monotonic clock
a61af66fc99e Initial load
duke
parents:
diff changeset
3119 // not a guarantee() because JVM should not abort on kernel/glibc bugs
a61af66fc99e Initial load
duke
parents:
diff changeset
3120 assert(!Linux::supports_monotonic_clock(), "time moving backwards");
a61af66fc99e Initial load
duke
parents:
diff changeset
3121 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3122 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISECS;
a61af66fc99e Initial load
duke
parents:
diff changeset
3123 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3124
a61af66fc99e Initial load
duke
parents:
diff changeset
3125 if(millis <= 0) break ;
a61af66fc99e Initial load
duke
parents:
diff changeset
3126
a61af66fc99e Initial load
duke
parents:
diff changeset
3127 prevtime = newtime;
a61af66fc99e Initial load
duke
parents:
diff changeset
3128 slp->park(millis);
a61af66fc99e Initial load
duke
parents:
diff changeset
3129 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3130 return OS_OK ;
a61af66fc99e Initial load
duke
parents:
diff changeset
3131 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3132 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3133
a61af66fc99e Initial load
duke
parents:
diff changeset
3134 int os::naked_sleep() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3135 // %% make the sleep time an integer flag. for now use 1 millisec.
a61af66fc99e Initial load
duke
parents:
diff changeset
3136 return os::sleep(Thread::current(), 1, false);
a61af66fc99e Initial load
duke
parents:
diff changeset
3137 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3138
a61af66fc99e Initial load
duke
parents:
diff changeset
3139 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
a61af66fc99e Initial load
duke
parents:
diff changeset
3140 void os::infinite_sleep() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3141 while (true) { // sleep forever ...
a61af66fc99e Initial load
duke
parents:
diff changeset
3142 ::sleep(100); // ... 100 seconds at a time
a61af66fc99e Initial load
duke
parents:
diff changeset
3143 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3144 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3145
a61af66fc99e Initial load
duke
parents:
diff changeset
3146 // Used to convert frequent JVM_Yield() to nops
a61af66fc99e Initial load
duke
parents:
diff changeset
3147 bool os::dont_yield() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3148 return DontYieldALot;
a61af66fc99e Initial load
duke
parents:
diff changeset
3149 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3150
a61af66fc99e Initial load
duke
parents:
diff changeset
3151 void os::yield() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3152 sched_yield();
a61af66fc99e Initial load
duke
parents:
diff changeset
3153 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3154
a61af66fc99e Initial load
duke
parents:
diff changeset
3155 os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN ;}
a61af66fc99e Initial load
duke
parents:
diff changeset
3156
a61af66fc99e Initial load
duke
parents:
diff changeset
3157 void os::yield_all(int attempts) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3158 // Yields to all threads, including threads with lower priorities
a61af66fc99e Initial load
duke
parents:
diff changeset
3159 // Threads on Linux are all with same priority. The Solaris style
a61af66fc99e Initial load
duke
parents:
diff changeset
3160 // os::yield_all() with nanosleep(1ms) is not necessary.
a61af66fc99e Initial load
duke
parents:
diff changeset
3161 sched_yield();
a61af66fc99e Initial load
duke
parents:
diff changeset
3162 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3163
a61af66fc99e Initial load
duke
parents:
diff changeset
3164 // Called from the tight loops to possibly influence time-sharing heuristics
a61af66fc99e Initial load
duke
parents:
diff changeset
3165 void os::loop_breaker(int attempts) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3166 os::yield_all(attempts);
a61af66fc99e Initial load
duke
parents:
diff changeset
3167 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3168
a61af66fc99e Initial load
duke
parents:
diff changeset
3169 ////////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
3170 // thread priority support
a61af66fc99e Initial load
duke
parents:
diff changeset
3171
a61af66fc99e Initial load
duke
parents:
diff changeset
3172 // Note: Normal Linux applications are run with SCHED_OTHER policy. SCHED_OTHER
a61af66fc99e Initial load
duke
parents:
diff changeset
3173 // only supports dynamic priority, static priority must be zero. For real-time
a61af66fc99e Initial load
duke
parents:
diff changeset
3174 // applications, Linux supports SCHED_RR which allows static priority (1-99).
a61af66fc99e Initial load
duke
parents:
diff changeset
3175 // However, for large multi-threaded applications, SCHED_RR is not only slower
a61af66fc99e Initial load
duke
parents:
diff changeset
3176 // than SCHED_OTHER, but also very unstable (my volano tests hang hard 4 out
a61af66fc99e Initial load
duke
parents:
diff changeset
3177 // of 5 runs - Sep 2005).
a61af66fc99e Initial load
duke
parents:
diff changeset
3178 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3179 // The following code actually changes the niceness of kernel-thread/LWP. It
a61af66fc99e Initial load
duke
parents:
diff changeset
3180 // has an assumption that setpriority() only modifies one kernel-thread/LWP,
a61af66fc99e Initial load
duke
parents:
diff changeset
3181 // not the entire user process, and user level threads are 1:1 mapped to kernel
a61af66fc99e Initial load
duke
parents:
diff changeset
3182 // threads. It has always been the case, but could change in the future. For
a61af66fc99e Initial load
duke
parents:
diff changeset
3183 // this reason, the code should not be used as default (ThreadPriorityPolicy=0).
a61af66fc99e Initial load
duke
parents:
diff changeset
3184 // It is only used when ThreadPriorityPolicy=1 and requires root privilege.
a61af66fc99e Initial load
duke
parents:
diff changeset
3185
a61af66fc99e Initial load
duke
parents:
diff changeset
3186 int os::java_to_os_priority[MaxPriority + 1] = {
a61af66fc99e Initial load
duke
parents:
diff changeset
3187 19, // 0 Entry should never be used
a61af66fc99e Initial load
duke
parents:
diff changeset
3188
a61af66fc99e Initial load
duke
parents:
diff changeset
3189 4, // 1 MinPriority
a61af66fc99e Initial load
duke
parents:
diff changeset
3190 3, // 2
a61af66fc99e Initial load
duke
parents:
diff changeset
3191 2, // 3
a61af66fc99e Initial load
duke
parents:
diff changeset
3192
a61af66fc99e Initial load
duke
parents:
diff changeset
3193 1, // 4
a61af66fc99e Initial load
duke
parents:
diff changeset
3194 0, // 5 NormPriority
a61af66fc99e Initial load
duke
parents:
diff changeset
3195 -1, // 6
a61af66fc99e Initial load
duke
parents:
diff changeset
3196
a61af66fc99e Initial load
duke
parents:
diff changeset
3197 -2, // 7
a61af66fc99e Initial load
duke
parents:
diff changeset
3198 -3, // 8
a61af66fc99e Initial load
duke
parents:
diff changeset
3199 -4, // 9 NearMaxPriority
a61af66fc99e Initial load
duke
parents:
diff changeset
3200
a61af66fc99e Initial load
duke
parents:
diff changeset
3201 -5 // 10 MaxPriority
a61af66fc99e Initial load
duke
parents:
diff changeset
3202 };
a61af66fc99e Initial load
duke
parents:
diff changeset
3203
a61af66fc99e Initial load
duke
parents:
diff changeset
3204 static int prio_init() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3205 if (ThreadPriorityPolicy == 1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3206 // Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1
a61af66fc99e Initial load
duke
parents:
diff changeset
3207 // if effective uid is not root. Perhaps, a more elegant way of doing
a61af66fc99e Initial load
duke
parents:
diff changeset
3208 // this is to test CAP_SYS_NICE capability, but that will require libcap.so
a61af66fc99e Initial load
duke
parents:
diff changeset
3209 if (geteuid() != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3210 if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3211 warning("-XX:ThreadPriorityPolicy requires root privilege on Linux");
a61af66fc99e Initial load
duke
parents:
diff changeset
3212 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3213 ThreadPriorityPolicy = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
3214 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3215 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3216 return 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
3217 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3218
a61af66fc99e Initial load
duke
parents:
diff changeset
3219 OSReturn os::set_native_priority(Thread* thread, int newpri) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3220 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) return OS_OK;
a61af66fc99e Initial load
duke
parents:
diff changeset
3221
a61af66fc99e Initial load
duke
parents:
diff changeset
3222 int ret = setpriority(PRIO_PROCESS, thread->osthread()->thread_id(), newpri);
a61af66fc99e Initial load
duke
parents:
diff changeset
3223 return (ret == 0) ? OS_OK : OS_ERR;
a61af66fc99e Initial load
duke
parents:
diff changeset
3224 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3225
a61af66fc99e Initial load
duke
parents:
diff changeset
3226 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3227 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3228 *priority_ptr = java_to_os_priority[NormPriority];
a61af66fc99e Initial load
duke
parents:
diff changeset
3229 return OS_OK;
a61af66fc99e Initial load
duke
parents:
diff changeset
3230 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3231
a61af66fc99e Initial load
duke
parents:
diff changeset
3232 errno = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
3233 *priority_ptr = getpriority(PRIO_PROCESS, thread->osthread()->thread_id());
a61af66fc99e Initial load
duke
parents:
diff changeset
3234 return (*priority_ptr != -1 || errno == 0 ? OS_OK : OS_ERR);
a61af66fc99e Initial load
duke
parents:
diff changeset
3235 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3236
a61af66fc99e Initial load
duke
parents:
diff changeset
3237 // Hint to the underlying OS that a task switch would not be good.
a61af66fc99e Initial load
duke
parents:
diff changeset
3238 // Void return because it's a hint and can fail.
a61af66fc99e Initial load
duke
parents:
diff changeset
3239 void os::hint_no_preempt() {}
a61af66fc99e Initial load
duke
parents:
diff changeset
3240
a61af66fc99e Initial load
duke
parents:
diff changeset
3241 ////////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
3242 // suspend/resume support
a61af66fc99e Initial load
duke
parents:
diff changeset
3243
a61af66fc99e Initial load
duke
parents:
diff changeset
3244 // the low-level signal-based suspend/resume support is a remnant from the
a61af66fc99e Initial load
duke
parents:
diff changeset
3245 // old VM-suspension that used to be for java-suspension, safepoints etc,
a61af66fc99e Initial load
duke
parents:
diff changeset
3246 // within hotspot. Now there is a single use-case for this:
a61af66fc99e Initial load
duke
parents:
diff changeset
3247 // - calling get_thread_pc() on the VMThread by the flat-profiler task
a61af66fc99e Initial load
duke
parents:
diff changeset
3248 // that runs in the watcher thread.
a61af66fc99e Initial load
duke
parents:
diff changeset
3249 // The remaining code is greatly simplified from the more general suspension
a61af66fc99e Initial load
duke
parents:
diff changeset
3250 // code that used to be used.
a61af66fc99e Initial load
duke
parents:
diff changeset
3251 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3252 // The protocol is quite simple:
a61af66fc99e Initial load
duke
parents:
diff changeset
3253 // - suspend:
a61af66fc99e Initial load
duke
parents:
diff changeset
3254 // - sends a signal to the target thread
a61af66fc99e Initial load
duke
parents:
diff changeset
3255 // - polls the suspend state of the osthread using a yield loop
a61af66fc99e Initial load
duke
parents:
diff changeset
3256 // - target thread signal handler (SR_handler) sets suspend state
a61af66fc99e Initial load
duke
parents:
diff changeset
3257 // and blocks in sigsuspend until continued
a61af66fc99e Initial load
duke
parents:
diff changeset
3258 // - resume:
a61af66fc99e Initial load
duke
parents:
diff changeset
3259 // - sets target osthread state to continue
a61af66fc99e Initial load
duke
parents:
diff changeset
3260 // - sends signal to end the sigsuspend loop in the SR_handler
a61af66fc99e Initial load
duke
parents:
diff changeset
3261 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3262 // Note that the SR_lock plays no role in this suspend/resume protocol.
a61af66fc99e Initial load
duke
parents:
diff changeset
3263 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3264
a61af66fc99e Initial load
duke
parents:
diff changeset
3265 static void resume_clear_context(OSThread *osthread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3266 osthread->set_ucontext(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3267 osthread->set_siginfo(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3268
a61af66fc99e Initial load
duke
parents:
diff changeset
3269 // notify the suspend action is completed, we have now resumed
a61af66fc99e Initial load
duke
parents:
diff changeset
3270 osthread->sr.clear_suspended();
a61af66fc99e Initial load
duke
parents:
diff changeset
3271 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3272
a61af66fc99e Initial load
duke
parents:
diff changeset
3273 static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3274 osthread->set_ucontext(context);
a61af66fc99e Initial load
duke
parents:
diff changeset
3275 osthread->set_siginfo(siginfo);
a61af66fc99e Initial load
duke
parents:
diff changeset
3276 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3277
a61af66fc99e Initial load
duke
parents:
diff changeset
3278 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3279 // Handler function invoked when a thread's execution is suspended or
a61af66fc99e Initial load
duke
parents:
diff changeset
3280 // resumed. We have to be careful that only async-safe functions are
a61af66fc99e Initial load
duke
parents:
diff changeset
3281 // called here (Note: most pthread functions are not async safe and
a61af66fc99e Initial load
duke
parents:
diff changeset
3282 // should be avoided.)
a61af66fc99e Initial load
duke
parents:
diff changeset
3283 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3284 // Note: sigwait() is a more natural fit than sigsuspend() from an
a61af66fc99e Initial load
duke
parents:
diff changeset
3285 // interface point of view, but sigwait() prevents the signal hander
a61af66fc99e Initial load
duke
parents:
diff changeset
3286 // from being run. libpthread would get very confused by not having
a61af66fc99e Initial load
duke
parents:
diff changeset
3287 // its signal handlers run and prevents sigwait()'s use with the
a61af66fc99e Initial load
duke
parents:
diff changeset
3288 // mutex granting granting signal.
a61af66fc99e Initial load
duke
parents:
diff changeset
3289 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3290 // Currently only ever called on the VMThread
a61af66fc99e Initial load
duke
parents:
diff changeset
3291 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3292 static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3293 // Save and restore errno to avoid confusing native code with EINTR
a61af66fc99e Initial load
duke
parents:
diff changeset
3294 // after sigsuspend.
a61af66fc99e Initial load
duke
parents:
diff changeset
3295 int old_errno = errno;
a61af66fc99e Initial load
duke
parents:
diff changeset
3296
a61af66fc99e Initial load
duke
parents:
diff changeset
3297 Thread* thread = Thread::current();
a61af66fc99e Initial load
duke
parents:
diff changeset
3298 OSThread* osthread = thread->osthread();
a61af66fc99e Initial load
duke
parents:
diff changeset
3299 assert(thread->is_VM_thread(), "Must be VMThread");
a61af66fc99e Initial load
duke
parents:
diff changeset
3300 // read current suspend action
a61af66fc99e Initial load
duke
parents:
diff changeset
3301 int action = osthread->sr.suspend_action();
a61af66fc99e Initial load
duke
parents:
diff changeset
3302 if (action == SR_SUSPEND) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3303 suspend_save_context(osthread, siginfo, context);
a61af66fc99e Initial load
duke
parents:
diff changeset
3304
a61af66fc99e Initial load
duke
parents:
diff changeset
3305 // Notify the suspend action is about to be completed. do_suspend()
a61af66fc99e Initial load
duke
parents:
diff changeset
3306 // waits until SR_SUSPENDED is set and then returns. We will wait
a61af66fc99e Initial load
duke
parents:
diff changeset
3307 // here for a resume signal and that completes the suspend-other
a61af66fc99e Initial load
duke
parents:
diff changeset
3308 // action. do_suspend/do_resume is always called as a pair from
a61af66fc99e Initial load
duke
parents:
diff changeset
3309 // the same thread - so there are no races
a61af66fc99e Initial load
duke
parents:
diff changeset
3310
a61af66fc99e Initial load
duke
parents:
diff changeset
3311 // notify the caller
a61af66fc99e Initial load
duke
parents:
diff changeset
3312 osthread->sr.set_suspended();
a61af66fc99e Initial load
duke
parents:
diff changeset
3313
a61af66fc99e Initial load
duke
parents:
diff changeset
3314 sigset_t suspend_set; // signals for sigsuspend()
a61af66fc99e Initial load
duke
parents:
diff changeset
3315
a61af66fc99e Initial load
duke
parents:
diff changeset
3316 // get current set of blocked signals and unblock resume signal
a61af66fc99e Initial load
duke
parents:
diff changeset
3317 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set);
a61af66fc99e Initial load
duke
parents:
diff changeset
3318 sigdelset(&suspend_set, SR_signum);
a61af66fc99e Initial load
duke
parents:
diff changeset
3319
a61af66fc99e Initial load
duke
parents:
diff changeset
3320 // wait here until we are resumed
a61af66fc99e Initial load
duke
parents:
diff changeset
3321 do {
a61af66fc99e Initial load
duke
parents:
diff changeset
3322 sigsuspend(&suspend_set);
a61af66fc99e Initial load
duke
parents:
diff changeset
3323 // ignore all returns until we get a resume signal
a61af66fc99e Initial load
duke
parents:
diff changeset
3324 } while (osthread->sr.suspend_action() != SR_CONTINUE);
a61af66fc99e Initial load
duke
parents:
diff changeset
3325
a61af66fc99e Initial load
duke
parents:
diff changeset
3326 resume_clear_context(osthread);
a61af66fc99e Initial load
duke
parents:
diff changeset
3327
a61af66fc99e Initial load
duke
parents:
diff changeset
3328 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3329 assert(action == SR_CONTINUE, "unexpected sr action");
a61af66fc99e Initial load
duke
parents:
diff changeset
3330 // nothing special to do - just leave the handler
a61af66fc99e Initial load
duke
parents:
diff changeset
3331 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3332
a61af66fc99e Initial load
duke
parents:
diff changeset
3333 errno = old_errno;
a61af66fc99e Initial load
duke
parents:
diff changeset
3334 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3335
a61af66fc99e Initial load
duke
parents:
diff changeset
3336
a61af66fc99e Initial load
duke
parents:
diff changeset
3337 static int SR_initialize() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3338 struct sigaction act;
a61af66fc99e Initial load
duke
parents:
diff changeset
3339 char *s;
a61af66fc99e Initial load
duke
parents:
diff changeset
3340 /* Get signal number to use for suspend/resume */
a61af66fc99e Initial load
duke
parents:
diff changeset
3341 if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3342 int sig = ::strtol(s, 0, 10);
a61af66fc99e Initial load
duke
parents:
diff changeset
3343 if (sig > 0 || sig < _NSIG) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3344 SR_signum = sig;
a61af66fc99e Initial load
duke
parents:
diff changeset
3345 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3346 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3347
a61af66fc99e Initial load
duke
parents:
diff changeset
3348 assert(SR_signum > SIGSEGV && SR_signum > SIGBUS,
a61af66fc99e Initial load
duke
parents:
diff changeset
3349 "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769");
a61af66fc99e Initial load
duke
parents:
diff changeset
3350
a61af66fc99e Initial load
duke
parents:
diff changeset
3351 sigemptyset(&SR_sigset);
a61af66fc99e Initial load
duke
parents:
diff changeset
3352 sigaddset(&SR_sigset, SR_signum);
a61af66fc99e Initial load
duke
parents:
diff changeset
3353
a61af66fc99e Initial load
duke
parents:
diff changeset
3354 /* Set up signal handler for suspend/resume */
a61af66fc99e Initial load
duke
parents:
diff changeset
3355 act.sa_flags = SA_RESTART|SA_SIGINFO;
a61af66fc99e Initial load
duke
parents:
diff changeset
3356 act.sa_handler = (void (*)(int)) SR_handler;
a61af66fc99e Initial load
duke
parents:
diff changeset
3357
a61af66fc99e Initial load
duke
parents:
diff changeset
3358 // SR_signum is blocked by default.
a61af66fc99e Initial load
duke
parents:
diff changeset
3359 // 4528190 - We also need to block pthread restart signal (32 on all
a61af66fc99e Initial load
duke
parents:
diff changeset
3360 // supported Linux platforms). Note that LinuxThreads need to block
a61af66fc99e Initial load
duke
parents:
diff changeset
3361 // this signal for all threads to work properly. So we don't have
a61af66fc99e Initial load
duke
parents:
diff changeset
3362 // to use hard-coded signal number when setting up the mask.
a61af66fc99e Initial load
duke
parents:
diff changeset
3363 pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask);
a61af66fc99e Initial load
duke
parents:
diff changeset
3364
a61af66fc99e Initial load
duke
parents:
diff changeset
3365 if (sigaction(SR_signum, &act, 0) == -1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3366 return -1;
a61af66fc99e Initial load
duke
parents:
diff changeset
3367 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3368
a61af66fc99e Initial load
duke
parents:
diff changeset
3369 // Save signal flag
a61af66fc99e Initial load
duke
parents:
diff changeset
3370 os::Linux::set_our_sigflags(SR_signum, act.sa_flags);
a61af66fc99e Initial load
duke
parents:
diff changeset
3371 return 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
3372 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3373
a61af66fc99e Initial load
duke
parents:
diff changeset
3374 static int SR_finalize() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3375 return 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
3376 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3377
a61af66fc99e Initial load
duke
parents:
diff changeset
3378
a61af66fc99e Initial load
duke
parents:
diff changeset
3379 // returns true on success and false on error - really an error is fatal
a61af66fc99e Initial load
duke
parents:
diff changeset
3380 // but this seems the normal response to library errors
a61af66fc99e Initial load
duke
parents:
diff changeset
3381 static bool do_suspend(OSThread* osthread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3382 // mark as suspended and send signal
a61af66fc99e Initial load
duke
parents:
diff changeset
3383 osthread->sr.set_suspend_action(SR_SUSPEND);
a61af66fc99e Initial load
duke
parents:
diff changeset
3384 int status = pthread_kill(osthread->pthread_id(), SR_signum);
a61af66fc99e Initial load
duke
parents:
diff changeset
3385 assert_status(status == 0, status, "pthread_kill");
a61af66fc99e Initial load
duke
parents:
diff changeset
3386
a61af66fc99e Initial load
duke
parents:
diff changeset
3387 // check status and wait until notified of suspension
a61af66fc99e Initial load
duke
parents:
diff changeset
3388 if (status == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3389 for (int i = 0; !osthread->sr.is_suspended(); i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3390 os::yield_all(i);
a61af66fc99e Initial load
duke
parents:
diff changeset
3391 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3392 osthread->sr.set_suspend_action(SR_NONE);
a61af66fc99e Initial load
duke
parents:
diff changeset
3393 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
3394 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3395 else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3396 osthread->sr.set_suspend_action(SR_NONE);
a61af66fc99e Initial load
duke
parents:
diff changeset
3397 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3398 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3399 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3400
a61af66fc99e Initial load
duke
parents:
diff changeset
3401 static void do_resume(OSThread* osthread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3402 assert(osthread->sr.is_suspended(), "thread should be suspended");
a61af66fc99e Initial load
duke
parents:
diff changeset
3403 osthread->sr.set_suspend_action(SR_CONTINUE);
a61af66fc99e Initial load
duke
parents:
diff changeset
3404
a61af66fc99e Initial load
duke
parents:
diff changeset
3405 int status = pthread_kill(osthread->pthread_id(), SR_signum);
a61af66fc99e Initial load
duke
parents:
diff changeset
3406 assert_status(status == 0, status, "pthread_kill");
a61af66fc99e Initial load
duke
parents:
diff changeset
3407 // check status and wait unit notified of resumption
a61af66fc99e Initial load
duke
parents:
diff changeset
3408 if (status == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3409 for (int i = 0; osthread->sr.is_suspended(); i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3410 os::yield_all(i);
a61af66fc99e Initial load
duke
parents:
diff changeset
3411 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3412 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3413 osthread->sr.set_suspend_action(SR_NONE);
a61af66fc99e Initial load
duke
parents:
diff changeset
3414 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3415
a61af66fc99e Initial load
duke
parents:
diff changeset
3416 ////////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
3417 // interrupt support
a61af66fc99e Initial load
duke
parents:
diff changeset
3418
a61af66fc99e Initial load
duke
parents:
diff changeset
3419 void os::interrupt(Thread* thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3420 assert(Thread::current() == thread || Threads_lock->owned_by_self(),
a61af66fc99e Initial load
duke
parents:
diff changeset
3421 "possibility of dangling Thread pointer");
a61af66fc99e Initial load
duke
parents:
diff changeset
3422
a61af66fc99e Initial load
duke
parents:
diff changeset
3423 OSThread* osthread = thread->osthread();
a61af66fc99e Initial load
duke
parents:
diff changeset
3424
a61af66fc99e Initial load
duke
parents:
diff changeset
3425 if (!osthread->interrupted()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3426 osthread->set_interrupted(true);
a61af66fc99e Initial load
duke
parents:
diff changeset
3427 // More than one thread can get here with the same value of osthread,
a61af66fc99e Initial load
duke
parents:
diff changeset
3428 // resulting in multiple notifications. We do, however, want the store
a61af66fc99e Initial load
duke
parents:
diff changeset
3429 // to interrupted() to be visible to other threads before we execute unpark().
a61af66fc99e Initial load
duke
parents:
diff changeset
3430 OrderAccess::fence();
a61af66fc99e Initial load
duke
parents:
diff changeset
3431 ParkEvent * const slp = thread->_SleepEvent ;
a61af66fc99e Initial load
duke
parents:
diff changeset
3432 if (slp != NULL) slp->unpark() ;
a61af66fc99e Initial load
duke
parents:
diff changeset
3433 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3434
a61af66fc99e Initial load
duke
parents:
diff changeset
3435 // For JSR166. Unpark even if interrupt status already was set
a61af66fc99e Initial load
duke
parents:
diff changeset
3436 if (thread->is_Java_thread())
a61af66fc99e Initial load
duke
parents:
diff changeset
3437 ((JavaThread*)thread)->parker()->unpark();
a61af66fc99e Initial load
duke
parents:
diff changeset
3438
a61af66fc99e Initial load
duke
parents:
diff changeset
3439 ParkEvent * ev = thread->_ParkEvent ;
a61af66fc99e Initial load
duke
parents:
diff changeset
3440 if (ev != NULL) ev->unpark() ;
a61af66fc99e Initial load
duke
parents:
diff changeset
3441
a61af66fc99e Initial load
duke
parents:
diff changeset
3442 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3443
a61af66fc99e Initial load
duke
parents:
diff changeset
3444 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3445 assert(Thread::current() == thread || Threads_lock->owned_by_self(),
a61af66fc99e Initial load
duke
parents:
diff changeset
3446 "possibility of dangling Thread pointer");
a61af66fc99e Initial load
duke
parents:
diff changeset
3447
a61af66fc99e Initial load
duke
parents:
diff changeset
3448 OSThread* osthread = thread->osthread();
a61af66fc99e Initial load
duke
parents:
diff changeset
3449
a61af66fc99e Initial load
duke
parents:
diff changeset
3450 bool interrupted = osthread->interrupted();
a61af66fc99e Initial load
duke
parents:
diff changeset
3451
a61af66fc99e Initial load
duke
parents:
diff changeset
3452 if (interrupted && clear_interrupted) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3453 osthread->set_interrupted(false);
a61af66fc99e Initial load
duke
parents:
diff changeset
3454 // consider thread->_SleepEvent->reset() ... optional optimization
a61af66fc99e Initial load
duke
parents:
diff changeset
3455 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3456
a61af66fc99e Initial load
duke
parents:
diff changeset
3457 return interrupted;
a61af66fc99e Initial load
duke
parents:
diff changeset
3458 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3459
a61af66fc99e Initial load
duke
parents:
diff changeset
3460 ///////////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
3461 // signal handling (except suspend/resume)
a61af66fc99e Initial load
duke
parents:
diff changeset
3462
a61af66fc99e Initial load
duke
parents:
diff changeset
3463 // This routine may be used by user applications as a "hook" to catch signals.
a61af66fc99e Initial load
duke
parents:
diff changeset
3464 // The user-defined signal handler must pass unrecognized signals to this
a61af66fc99e Initial load
duke
parents:
diff changeset
3465 // routine, and if it returns true (non-zero), then the signal handler must
a61af66fc99e Initial load
duke
parents:
diff changeset
3466 // return immediately. If the flag "abort_if_unrecognized" is true, then this
a61af66fc99e Initial load
duke
parents:
diff changeset
3467 // routine will never retun false (zero), but instead will execute a VM panic
a61af66fc99e Initial load
duke
parents:
diff changeset
3468 // routine kill the process.
a61af66fc99e Initial load
duke
parents:
diff changeset
3469 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3470 // If this routine returns false, it is OK to call it again. This allows
a61af66fc99e Initial load
duke
parents:
diff changeset
3471 // the user-defined signal handler to perform checks either before or after
a61af66fc99e Initial load
duke
parents:
diff changeset
3472 // the VM performs its own checks. Naturally, the user code would be making
a61af66fc99e Initial load
duke
parents:
diff changeset
3473 // a serious error if it tried to handle an exception (such as a null check
a61af66fc99e Initial load
duke
parents:
diff changeset
3474 // or breakpoint) that the VM was generating for its own correct operation.
a61af66fc99e Initial load
duke
parents:
diff changeset
3475 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3476 // This routine may recognize any of the following kinds of signals:
a61af66fc99e Initial load
duke
parents:
diff changeset
3477 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1.
a61af66fc99e Initial load
duke
parents:
diff changeset
3478 // It should be consulted by handlers for any of those signals.
a61af66fc99e Initial load
duke
parents:
diff changeset
3479 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3480 // The caller of this routine must pass in the three arguments supplied
a61af66fc99e Initial load
duke
parents:
diff changeset
3481 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
a61af66fc99e Initial load
duke
parents:
diff changeset
3482 // field of the structure passed to sigaction(). This routine assumes that
a61af66fc99e Initial load
duke
parents:
diff changeset
3483 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
a61af66fc99e Initial load
duke
parents:
diff changeset
3484 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3485 // Note that the VM will print warnings if it detects conflicting signal
a61af66fc99e Initial load
duke
parents:
diff changeset
3486 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
a61af66fc99e Initial load
duke
parents:
diff changeset
3487 //
2191
d70fe6ab4436 6588413: Use -fvisibility=hidden for gcc compiles
coleenp
parents: 2130
diff changeset
3488 extern "C" JNIEXPORT int
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3489 JVM_handle_linux_signal(int signo, siginfo_t* siginfo,
a61af66fc99e Initial load
duke
parents:
diff changeset
3490 void* ucontext, int abort_if_unrecognized);
a61af66fc99e Initial load
duke
parents:
diff changeset
3491
a61af66fc99e Initial load
duke
parents:
diff changeset
3492 void signalHandler(int sig, siginfo_t* info, void* uc) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3493 assert(info != NULL && uc != NULL, "it must be old kernel");
a61af66fc99e Initial load
duke
parents:
diff changeset
3494 JVM_handle_linux_signal(sig, info, uc, true);
a61af66fc99e Initial load
duke
parents:
diff changeset
3495 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3496
a61af66fc99e Initial load
duke
parents:
diff changeset
3497
a61af66fc99e Initial load
duke
parents:
diff changeset
3498 // This boolean allows users to forward their own non-matching signals
a61af66fc99e Initial load
duke
parents:
diff changeset
3499 // to JVM_handle_linux_signal, harmlessly.
a61af66fc99e Initial load
duke
parents:
diff changeset
3500 bool os::Linux::signal_handlers_are_installed = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3501
a61af66fc99e Initial load
duke
parents:
diff changeset
3502 // For signal-chaining
a61af66fc99e Initial load
duke
parents:
diff changeset
3503 struct sigaction os::Linux::sigact[MAXSIGNUM];
a61af66fc99e Initial load
duke
parents:
diff changeset
3504 unsigned int os::Linux::sigs = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
3505 bool os::Linux::libjsig_is_loaded = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3506 typedef struct sigaction *(*get_signal_t)(int);
a61af66fc99e Initial load
duke
parents:
diff changeset
3507 get_signal_t os::Linux::get_signal_action = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3508
a61af66fc99e Initial load
duke
parents:
diff changeset
3509 struct sigaction* os::Linux::get_chained_signal_action(int sig) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3510 struct sigaction *actp = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3511
a61af66fc99e Initial load
duke
parents:
diff changeset
3512 if (libjsig_is_loaded) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3513 // Retrieve the old signal handler from libjsig
a61af66fc99e Initial load
duke
parents:
diff changeset
3514 actp = (*get_signal_action)(sig);
a61af66fc99e Initial load
duke
parents:
diff changeset
3515 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3516 if (actp == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3517 // Retrieve the preinstalled signal handler from jvm
a61af66fc99e Initial load
duke
parents:
diff changeset
3518 actp = get_preinstalled_handler(sig);
a61af66fc99e Initial load
duke
parents:
diff changeset
3519 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3520
a61af66fc99e Initial load
duke
parents:
diff changeset
3521 return actp;
a61af66fc99e Initial load
duke
parents:
diff changeset
3522 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3523
a61af66fc99e Initial load
duke
parents:
diff changeset
3524 static bool call_chained_handler(struct sigaction *actp, int sig,
a61af66fc99e Initial load
duke
parents:
diff changeset
3525 siginfo_t *siginfo, void *context) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3526 // Call the old signal handler
a61af66fc99e Initial load
duke
parents:
diff changeset
3527 if (actp->sa_handler == SIG_DFL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3528 // It's more reasonable to let jvm treat it as an unexpected exception
a61af66fc99e Initial load
duke
parents:
diff changeset
3529 // instead of taking the default action.
a61af66fc99e Initial load
duke
parents:
diff changeset
3530 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3531 } else if (actp->sa_handler != SIG_IGN) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3532 if ((actp->sa_flags & SA_NODEFER) == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3533 // automaticlly block the signal
a61af66fc99e Initial load
duke
parents:
diff changeset
3534 sigaddset(&(actp->sa_mask), sig);
a61af66fc99e Initial load
duke
parents:
diff changeset
3535 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3536
a61af66fc99e Initial load
duke
parents:
diff changeset
3537 sa_handler_t hand;
a61af66fc99e Initial load
duke
parents:
diff changeset
3538 sa_sigaction_t sa;
a61af66fc99e Initial load
duke
parents:
diff changeset
3539 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
3540 // retrieve the chained handler
a61af66fc99e Initial load
duke
parents:
diff changeset
3541 if (siginfo_flag_set) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3542 sa = actp->sa_sigaction;
a61af66fc99e Initial load
duke
parents:
diff changeset
3543 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3544 hand = actp->sa_handler;
a61af66fc99e Initial load
duke
parents:
diff changeset
3545 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3546
a61af66fc99e Initial load
duke
parents:
diff changeset
3547 if ((actp->sa_flags & SA_RESETHAND) != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3548 actp->sa_handler = SIG_DFL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3549 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3550
a61af66fc99e Initial load
duke
parents:
diff changeset
3551 // try to honor the signal mask
a61af66fc99e Initial load
duke
parents:
diff changeset
3552 sigset_t oset;
a61af66fc99e Initial load
duke
parents:
diff changeset
3553 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset);
a61af66fc99e Initial load
duke
parents:
diff changeset
3554
a61af66fc99e Initial load
duke
parents:
diff changeset
3555 // call into the chained handler
a61af66fc99e Initial load
duke
parents:
diff changeset
3556 if (siginfo_flag_set) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3557 (*sa)(sig, siginfo, context);
a61af66fc99e Initial load
duke
parents:
diff changeset
3558 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3559 (*hand)(sig);
a61af66fc99e Initial load
duke
parents:
diff changeset
3560 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3561
a61af66fc99e Initial load
duke
parents:
diff changeset
3562 // restore the signal mask
a61af66fc99e Initial load
duke
parents:
diff changeset
3563 pthread_sigmask(SIG_SETMASK, &oset, 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3564 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3565 // Tell jvm's signal handler the signal is taken care of.
a61af66fc99e Initial load
duke
parents:
diff changeset
3566 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
3567 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3568
a61af66fc99e Initial load
duke
parents:
diff changeset
3569 bool os::Linux::chained_handler(int sig, siginfo_t* siginfo, void* context) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3570 bool chained = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3571 // signal-chaining
a61af66fc99e Initial load
duke
parents:
diff changeset
3572 if (UseSignalChaining) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3573 struct sigaction *actp = get_chained_signal_action(sig);
a61af66fc99e Initial load
duke
parents:
diff changeset
3574 if (actp != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3575 chained = call_chained_handler(actp, sig, siginfo, context);
a61af66fc99e Initial load
duke
parents:
diff changeset
3576 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3577 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3578 return chained;
a61af66fc99e Initial load
duke
parents:
diff changeset
3579 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3580
a61af66fc99e Initial load
duke
parents:
diff changeset
3581 struct sigaction* os::Linux::get_preinstalled_handler(int sig) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3582 if ((( (unsigned int)1 << sig ) & sigs) != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3583 return &sigact[sig];
a61af66fc99e Initial load
duke
parents:
diff changeset
3584 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3585 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3586 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3587
a61af66fc99e Initial load
duke
parents:
diff changeset
3588 void os::Linux::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3589 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range");
a61af66fc99e Initial load
duke
parents:
diff changeset
3590 sigact[sig] = oldAct;
a61af66fc99e Initial load
duke
parents:
diff changeset
3591 sigs |= (unsigned int)1 << sig;
a61af66fc99e Initial load
duke
parents:
diff changeset
3592 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3593
a61af66fc99e Initial load
duke
parents:
diff changeset
3594 // for diagnostic
a61af66fc99e Initial load
duke
parents:
diff changeset
3595 int os::Linux::sigflags[MAXSIGNUM];
a61af66fc99e Initial load
duke
parents:
diff changeset
3596
a61af66fc99e Initial load
duke
parents:
diff changeset
3597 int os::Linux::get_our_sigflags(int sig) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3598 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range");
a61af66fc99e Initial load
duke
parents:
diff changeset
3599 return sigflags[sig];
a61af66fc99e Initial load
duke
parents:
diff changeset
3600 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3601
a61af66fc99e Initial load
duke
parents:
diff changeset
3602 void os::Linux::set_our_sigflags(int sig, int flags) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3603 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range");
a61af66fc99e Initial load
duke
parents:
diff changeset
3604 sigflags[sig] = flags;
a61af66fc99e Initial load
duke
parents:
diff changeset
3605 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3606
a61af66fc99e Initial load
duke
parents:
diff changeset
3607 void os::Linux::set_signal_handler(int sig, bool set_installed) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3608 // Check for overwrite.
a61af66fc99e Initial load
duke
parents:
diff changeset
3609 struct sigaction oldAct;
a61af66fc99e Initial load
duke
parents:
diff changeset
3610 sigaction(sig, (struct sigaction*)NULL, &oldAct);
a61af66fc99e Initial load
duke
parents:
diff changeset
3611
a61af66fc99e Initial load
duke
parents:
diff changeset
3612 void* oldhand = oldAct.sa_sigaction
a61af66fc99e Initial load
duke
parents:
diff changeset
3613 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
a61af66fc99e Initial load
duke
parents:
diff changeset
3614 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
a61af66fc99e Initial load
duke
parents:
diff changeset
3615 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
a61af66fc99e Initial load
duke
parents:
diff changeset
3616 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
a61af66fc99e Initial load
duke
parents:
diff changeset
3617 oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)signalHandler)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3618 if (AllowUserSignalHandlers || !set_installed) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3619 // Do not overwrite; user takes responsibility to forward to us.
a61af66fc99e Initial load
duke
parents:
diff changeset
3620 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
3621 } else if (UseSignalChaining) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3622 // save the old handler in jvm
a61af66fc99e Initial load
duke
parents:
diff changeset
3623 save_preinstalled_handler(sig, oldAct);
a61af66fc99e Initial load
duke
parents:
diff changeset
3624 // libjsig also interposes the sigaction() call below and saves the
a61af66fc99e Initial load
duke
parents:
diff changeset
3625 // old sigaction on it own.
a61af66fc99e Initial load
duke
parents:
diff changeset
3626 } else {
1490
f03d0a26bf83 6888954: argument formatting for assert() and friends
jcoomes
parents: 1353
diff changeset
3627 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
f03d0a26bf83 6888954: argument formatting for assert() and friends
jcoomes
parents: 1353
diff changeset
3628 "%#lx for signal %d.", (long)oldhand, sig));
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3629 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3630 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3631
a61af66fc99e Initial load
duke
parents:
diff changeset
3632 struct sigaction sigAct;
a61af66fc99e Initial load
duke
parents:
diff changeset
3633 sigfillset(&(sigAct.sa_mask));
a61af66fc99e Initial load
duke
parents:
diff changeset
3634 sigAct.sa_handler = SIG_DFL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3635 if (!set_installed) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3636 sigAct.sa_flags = SA_SIGINFO|SA_RESTART;
a61af66fc99e Initial load
duke
parents:
diff changeset
3637 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3638 sigAct.sa_sigaction = signalHandler;
a61af66fc99e Initial load
duke
parents:
diff changeset
3639 sigAct.sa_flags = SA_SIGINFO|SA_RESTART;
a61af66fc99e Initial load
duke
parents:
diff changeset
3640 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3641 // Save flags, which are set by ours
a61af66fc99e Initial load
duke
parents:
diff changeset
3642 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range");
a61af66fc99e Initial load
duke
parents:
diff changeset
3643 sigflags[sig] = sigAct.sa_flags;
a61af66fc99e Initial load
duke
parents:
diff changeset
3644
a61af66fc99e Initial load
duke
parents:
diff changeset
3645 int ret = sigaction(sig, &sigAct, &oldAct);
a61af66fc99e Initial load
duke
parents:
diff changeset
3646 assert(ret == 0, "check");
a61af66fc99e Initial load
duke
parents:
diff changeset
3647
a61af66fc99e Initial load
duke
parents:
diff changeset
3648 void* oldhand2 = oldAct.sa_sigaction
a61af66fc99e Initial load
duke
parents:
diff changeset
3649 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
a61af66fc99e Initial load
duke
parents:
diff changeset
3650 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
a61af66fc99e Initial load
duke
parents:
diff changeset
3651 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
a61af66fc99e Initial load
duke
parents:
diff changeset
3652 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3653
a61af66fc99e Initial load
duke
parents:
diff changeset
3654 // install signal handlers for signals that HotSpot needs to
a61af66fc99e Initial load
duke
parents:
diff changeset
3655 // handle in order to support Java-level exception handling.
a61af66fc99e Initial load
duke
parents:
diff changeset
3656
a61af66fc99e Initial load
duke
parents:
diff changeset
3657 void os::Linux::install_signal_handlers() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3658 if (!signal_handlers_are_installed) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3659 signal_handlers_are_installed = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
3660
a61af66fc99e Initial load
duke
parents:
diff changeset
3661 // signal-chaining
a61af66fc99e Initial load
duke
parents:
diff changeset
3662 typedef void (*signal_setting_t)();
a61af66fc99e Initial load
duke
parents:
diff changeset
3663 signal_setting_t begin_signal_setting = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3664 signal_setting_t end_signal_setting = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3665 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
a61af66fc99e Initial load
duke
parents:
diff changeset
3666 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
a61af66fc99e Initial load
duke
parents:
diff changeset
3667 if (begin_signal_setting != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3668 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
a61af66fc99e Initial load
duke
parents:
diff changeset
3669 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
a61af66fc99e Initial load
duke
parents:
diff changeset
3670 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
a61af66fc99e Initial load
duke
parents:
diff changeset
3671 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
a61af66fc99e Initial load
duke
parents:
diff changeset
3672 libjsig_is_loaded = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
3673 assert(UseSignalChaining, "should enable signal-chaining");
a61af66fc99e Initial load
duke
parents:
diff changeset
3674 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3675 if (libjsig_is_loaded) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3676 // Tell libjsig jvm is setting signal handlers
a61af66fc99e Initial load
duke
parents:
diff changeset
3677 (*begin_signal_setting)();
a61af66fc99e Initial load
duke
parents:
diff changeset
3678 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3679
a61af66fc99e Initial load
duke
parents:
diff changeset
3680 set_signal_handler(SIGSEGV, true);
a61af66fc99e Initial load
duke
parents:
diff changeset
3681 set_signal_handler(SIGPIPE, true);
a61af66fc99e Initial load
duke
parents:
diff changeset
3682 set_signal_handler(SIGBUS, true);
a61af66fc99e Initial load
duke
parents:
diff changeset
3683 set_signal_handler(SIGILL, true);
a61af66fc99e Initial load
duke
parents:
diff changeset
3684 set_signal_handler(SIGFPE, true);
a61af66fc99e Initial load
duke
parents:
diff changeset
3685 set_signal_handler(SIGXFSZ, true);
a61af66fc99e Initial load
duke
parents:
diff changeset
3686
a61af66fc99e Initial load
duke
parents:
diff changeset
3687 if (libjsig_is_loaded) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3688 // Tell libjsig jvm finishes setting signal handlers
a61af66fc99e Initial load
duke
parents:
diff changeset
3689 (*end_signal_setting)();
a61af66fc99e Initial load
duke
parents:
diff changeset
3690 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3691
a61af66fc99e Initial load
duke
parents:
diff changeset
3692 // We don't activate signal checker if libjsig is in place, we trust ourselves
a61af66fc99e Initial load
duke
parents:
diff changeset
3693 // and if UserSignalHandler is installed all bets are off
a61af66fc99e Initial load
duke
parents:
diff changeset
3694 if (CheckJNICalls) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3695 if (libjsig_is_loaded) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3696 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
a61af66fc99e Initial load
duke
parents:
diff changeset
3697 check_signals = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3698 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3699 if (AllowUserSignalHandlers) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3700 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
a61af66fc99e Initial load
duke
parents:
diff changeset
3701 check_signals = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3702 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3703 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3704 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3705 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3706
a61af66fc99e Initial load
duke
parents:
diff changeset
3707 // This is the fastest way to get thread cpu time on Linux.
a61af66fc99e Initial load
duke
parents:
diff changeset
3708 // Returns cpu time (user+sys) for any thread, not only for current.
a61af66fc99e Initial load
duke
parents:
diff changeset
3709 // POSIX compliant clocks are implemented in the kernels 2.6.16+.
a61af66fc99e Initial load
duke
parents:
diff changeset
3710 // It might work on 2.6.10+ with a special kernel/glibc patch.
a61af66fc99e Initial load
duke
parents:
diff changeset
3711 // For reference, please, see IEEE Std 1003.1-2004:
a61af66fc99e Initial load
duke
parents:
diff changeset
3712 // http://www.unix.org/single_unix_specification
a61af66fc99e Initial load
duke
parents:
diff changeset
3713
a61af66fc99e Initial load
duke
parents:
diff changeset
3714 jlong os::Linux::fast_thread_cpu_time(clockid_t clockid) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3715 struct timespec tp;
a61af66fc99e Initial load
duke
parents:
diff changeset
3716 int rc = os::Linux::clock_gettime(clockid, &tp);
a61af66fc99e Initial load
duke
parents:
diff changeset
3717 assert(rc == 0, "clock_gettime is expected to return 0 code");
a61af66fc99e Initial load
duke
parents:
diff changeset
3718
a61af66fc99e Initial load
duke
parents:
diff changeset
3719 return (tp.tv_sec * SEC_IN_NANOSECS) + tp.tv_nsec;
a61af66fc99e Initial load
duke
parents:
diff changeset
3720 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3721
a61af66fc99e Initial load
duke
parents:
diff changeset
3722 /////
a61af66fc99e Initial load
duke
parents:
diff changeset
3723 // glibc on Linux platform uses non-documented flag
a61af66fc99e Initial load
duke
parents:
diff changeset
3724 // to indicate, that some special sort of signal
a61af66fc99e Initial load
duke
parents:
diff changeset
3725 // trampoline is used.
a61af66fc99e Initial load
duke
parents:
diff changeset
3726 // We will never set this flag, and we should
a61af66fc99e Initial load
duke
parents:
diff changeset
3727 // ignore this flag in our diagnostic
a61af66fc99e Initial load
duke
parents:
diff changeset
3728 #ifdef SIGNIFICANT_SIGNAL_MASK
a61af66fc99e Initial load
duke
parents:
diff changeset
3729 #undef SIGNIFICANT_SIGNAL_MASK
a61af66fc99e Initial load
duke
parents:
diff changeset
3730 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
3731 #define SIGNIFICANT_SIGNAL_MASK (~0x04000000)
a61af66fc99e Initial load
duke
parents:
diff changeset
3732
a61af66fc99e Initial load
duke
parents:
diff changeset
3733 static const char* get_signal_handler_name(address handler,
a61af66fc99e Initial load
duke
parents:
diff changeset
3734 char* buf, int buflen) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3735 int offset;
a61af66fc99e Initial load
duke
parents:
diff changeset
3736 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
a61af66fc99e Initial load
duke
parents:
diff changeset
3737 if (found) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3738 // skip directory names
a61af66fc99e Initial load
duke
parents:
diff changeset
3739 const char *p1, *p2;
a61af66fc99e Initial load
duke
parents:
diff changeset
3740 p1 = buf;
a61af66fc99e Initial load
duke
parents:
diff changeset
3741 size_t len = strlen(os::file_separator());
a61af66fc99e Initial load
duke
parents:
diff changeset
3742 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
a61af66fc99e Initial load
duke
parents:
diff changeset
3743 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
a61af66fc99e Initial load
duke
parents:
diff changeset
3744 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3745 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
a61af66fc99e Initial load
duke
parents:
diff changeset
3746 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3747 return buf;
a61af66fc99e Initial load
duke
parents:
diff changeset
3748 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3749
a61af66fc99e Initial load
duke
parents:
diff changeset
3750 static void print_signal_handler(outputStream* st, int sig,
a61af66fc99e Initial load
duke
parents:
diff changeset
3751 char* buf, size_t buflen) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3752 struct sigaction sa;
a61af66fc99e Initial load
duke
parents:
diff changeset
3753
a61af66fc99e Initial load
duke
parents:
diff changeset
3754 sigaction(sig, NULL, &sa);
a61af66fc99e Initial load
duke
parents:
diff changeset
3755
a61af66fc99e Initial load
duke
parents:
diff changeset
3756 // See comment for SIGNIFICANT_SIGNAL_MASK define
a61af66fc99e Initial load
duke
parents:
diff changeset
3757 sa.sa_flags &= SIGNIFICANT_SIGNAL_MASK;
a61af66fc99e Initial load
duke
parents:
diff changeset
3758
a61af66fc99e Initial load
duke
parents:
diff changeset
3759 st->print("%s: ", os::exception_name(sig, buf, buflen));
a61af66fc99e Initial load
duke
parents:
diff changeset
3760
a61af66fc99e Initial load
duke
parents:
diff changeset
3761 address handler = (sa.sa_flags & SA_SIGINFO)
a61af66fc99e Initial load
duke
parents:
diff changeset
3762 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
a61af66fc99e Initial load
duke
parents:
diff changeset
3763 : CAST_FROM_FN_PTR(address, sa.sa_handler);
a61af66fc99e Initial load
duke
parents:
diff changeset
3764
a61af66fc99e Initial load
duke
parents:
diff changeset
3765 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3766 st->print("SIG_DFL");
a61af66fc99e Initial load
duke
parents:
diff changeset
3767 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3768 st->print("SIG_IGN");
a61af66fc99e Initial load
duke
parents:
diff changeset
3769 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3770 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
a61af66fc99e Initial load
duke
parents:
diff changeset
3771 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3772
a61af66fc99e Initial load
duke
parents:
diff changeset
3773 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask);
a61af66fc99e Initial load
duke
parents:
diff changeset
3774
a61af66fc99e Initial load
duke
parents:
diff changeset
3775 address rh = VMError::get_resetted_sighandler(sig);
a61af66fc99e Initial load
duke
parents:
diff changeset
3776 // May be, handler was resetted by VMError?
a61af66fc99e Initial load
duke
parents:
diff changeset
3777 if(rh != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3778 handler = rh;
a61af66fc99e Initial load
duke
parents:
diff changeset
3779 sa.sa_flags = VMError::get_resetted_sigflags(sig) & SIGNIFICANT_SIGNAL_MASK;
a61af66fc99e Initial load
duke
parents:
diff changeset
3780 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3781
a61af66fc99e Initial load
duke
parents:
diff changeset
3782 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags);
a61af66fc99e Initial load
duke
parents:
diff changeset
3783
a61af66fc99e Initial load
duke
parents:
diff changeset
3784 // Check: is it our handler?
a61af66fc99e Initial load
duke
parents:
diff changeset
3785 if(handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler) ||
a61af66fc99e Initial load
duke
parents:
diff changeset
3786 handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3787 // It is our signal handler
a61af66fc99e Initial load
duke
parents:
diff changeset
3788 // check for flags, reset system-used one!
a61af66fc99e Initial load
duke
parents:
diff changeset
3789 if((int)sa.sa_flags != os::Linux::get_our_sigflags(sig)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3790 st->print(
a61af66fc99e Initial load
duke
parents:
diff changeset
3791 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
a61af66fc99e Initial load
duke
parents:
diff changeset
3792 os::Linux::get_our_sigflags(sig));
a61af66fc99e Initial load
duke
parents:
diff changeset
3793 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3794 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3795 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
3796 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3797
a61af66fc99e Initial load
duke
parents:
diff changeset
3798
a61af66fc99e Initial load
duke
parents:
diff changeset
3799 #define DO_SIGNAL_CHECK(sig) \
a61af66fc99e Initial load
duke
parents:
diff changeset
3800 if (!sigismember(&check_signal_done, sig)) \
a61af66fc99e Initial load
duke
parents:
diff changeset
3801 os::Linux::check_signal_handler(sig)
a61af66fc99e Initial load
duke
parents:
diff changeset
3802
a61af66fc99e Initial load
duke
parents:
diff changeset
3803 // This method is a periodic task to check for misbehaving JNI applications
a61af66fc99e Initial load
duke
parents:
diff changeset
3804 // under CheckJNI, we can add any periodic checks here
a61af66fc99e Initial load
duke
parents:
diff changeset
3805
a61af66fc99e Initial load
duke
parents:
diff changeset
3806 void os::run_periodic_checks() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3807
a61af66fc99e Initial load
duke
parents:
diff changeset
3808 if (check_signals == false) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
3809
a61af66fc99e Initial load
duke
parents:
diff changeset
3810 // SEGV and BUS if overridden could potentially prevent
a61af66fc99e Initial load
duke
parents:
diff changeset
3811 // generation of hs*.log in the event of a crash, debugging
a61af66fc99e Initial load
duke
parents:
diff changeset
3812 // such a case can be very challenging, so we absolutely
a61af66fc99e Initial load
duke
parents:
diff changeset
3813 // check the following for a good measure:
a61af66fc99e Initial load
duke
parents:
diff changeset
3814 DO_SIGNAL_CHECK(SIGSEGV);
a61af66fc99e Initial load
duke
parents:
diff changeset
3815 DO_SIGNAL_CHECK(SIGILL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3816 DO_SIGNAL_CHECK(SIGFPE);
a61af66fc99e Initial load
duke
parents:
diff changeset
3817 DO_SIGNAL_CHECK(SIGBUS);
a61af66fc99e Initial load
duke
parents:
diff changeset
3818 DO_SIGNAL_CHECK(SIGPIPE);
a61af66fc99e Initial load
duke
parents:
diff changeset
3819 DO_SIGNAL_CHECK(SIGXFSZ);
a61af66fc99e Initial load
duke
parents:
diff changeset
3820
a61af66fc99e Initial load
duke
parents:
diff changeset
3821
a61af66fc99e Initial load
duke
parents:
diff changeset
3822 // ReduceSignalUsage allows the user to override these handlers
a61af66fc99e Initial load
duke
parents:
diff changeset
3823 // see comments at the very top and jvm_solaris.h
a61af66fc99e Initial load
duke
parents:
diff changeset
3824 if (!ReduceSignalUsage) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3825 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3826 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3827 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3828 DO_SIGNAL_CHECK(BREAK_SIGNAL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3829 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3830
a61af66fc99e Initial load
duke
parents:
diff changeset
3831 DO_SIGNAL_CHECK(SR_signum);
a61af66fc99e Initial load
duke
parents:
diff changeset
3832 DO_SIGNAL_CHECK(INTERRUPT_SIGNAL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3833 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3834
a61af66fc99e Initial load
duke
parents:
diff changeset
3835 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
a61af66fc99e Initial load
duke
parents:
diff changeset
3836
a61af66fc99e Initial load
duke
parents:
diff changeset
3837 static os_sigaction_t os_sigaction = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3838
a61af66fc99e Initial load
duke
parents:
diff changeset
3839 void os::Linux::check_signal_handler(int sig) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3840 char buf[O_BUFLEN];
a61af66fc99e Initial load
duke
parents:
diff changeset
3841 address jvmHandler = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3842
a61af66fc99e Initial load
duke
parents:
diff changeset
3843
a61af66fc99e Initial load
duke
parents:
diff changeset
3844 struct sigaction act;
a61af66fc99e Initial load
duke
parents:
diff changeset
3845 if (os_sigaction == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3846 // only trust the default sigaction, in case it has been interposed
a61af66fc99e Initial load
duke
parents:
diff changeset
3847 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
a61af66fc99e Initial load
duke
parents:
diff changeset
3848 if (os_sigaction == NULL) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
3849 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3850
a61af66fc99e Initial load
duke
parents:
diff changeset
3851 os_sigaction(sig, (struct sigaction*)NULL, &act);
a61af66fc99e Initial load
duke
parents:
diff changeset
3852
a61af66fc99e Initial load
duke
parents:
diff changeset
3853
a61af66fc99e Initial load
duke
parents:
diff changeset
3854 act.sa_flags &= SIGNIFICANT_SIGNAL_MASK;
a61af66fc99e Initial load
duke
parents:
diff changeset
3855
a61af66fc99e Initial load
duke
parents:
diff changeset
3856 address thisHandler = (act.sa_flags & SA_SIGINFO)
a61af66fc99e Initial load
duke
parents:
diff changeset
3857 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
a61af66fc99e Initial load
duke
parents:
diff changeset
3858 : CAST_FROM_FN_PTR(address, act.sa_handler) ;
a61af66fc99e Initial load
duke
parents:
diff changeset
3859
a61af66fc99e Initial load
duke
parents:
diff changeset
3860
a61af66fc99e Initial load
duke
parents:
diff changeset
3861 switch(sig) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3862 case SIGSEGV:
a61af66fc99e Initial load
duke
parents:
diff changeset
3863 case SIGBUS:
a61af66fc99e Initial load
duke
parents:
diff changeset
3864 case SIGFPE:
a61af66fc99e Initial load
duke
parents:
diff changeset
3865 case SIGPIPE:
a61af66fc99e Initial load
duke
parents:
diff changeset
3866 case SIGILL:
a61af66fc99e Initial load
duke
parents:
diff changeset
3867 case SIGXFSZ:
a61af66fc99e Initial load
duke
parents:
diff changeset
3868 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler);
a61af66fc99e Initial load
duke
parents:
diff changeset
3869 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
3870
a61af66fc99e Initial load
duke
parents:
diff changeset
3871 case SHUTDOWN1_SIGNAL:
a61af66fc99e Initial load
duke
parents:
diff changeset
3872 case SHUTDOWN2_SIGNAL:
a61af66fc99e Initial load
duke
parents:
diff changeset
3873 case SHUTDOWN3_SIGNAL:
a61af66fc99e Initial load
duke
parents:
diff changeset
3874 case BREAK_SIGNAL:
a61af66fc99e Initial load
duke
parents:
diff changeset
3875 jvmHandler = (address)user_handler();
a61af66fc99e Initial load
duke
parents:
diff changeset
3876 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
3877
a61af66fc99e Initial load
duke
parents:
diff changeset
3878 case INTERRUPT_SIGNAL:
a61af66fc99e Initial load
duke
parents:
diff changeset
3879 jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3880 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
3881
a61af66fc99e Initial load
duke
parents:
diff changeset
3882 default:
a61af66fc99e Initial load
duke
parents:
diff changeset
3883 if (sig == SR_signum) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3884 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler);
a61af66fc99e Initial load
duke
parents:
diff changeset
3885 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3886 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
3887 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3888 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
3889 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3890
a61af66fc99e Initial load
duke
parents:
diff changeset
3891 if (thisHandler != jvmHandler) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3892 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
a61af66fc99e Initial load
duke
parents:
diff changeset
3893 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
a61af66fc99e Initial load
duke
parents:
diff changeset
3894 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
a61af66fc99e Initial load
duke
parents:
diff changeset
3895 // No need to check this sig any longer
a61af66fc99e Initial load
duke
parents:
diff changeset
3896 sigaddset(&check_signal_done, sig);
a61af66fc99e Initial load
duke
parents:
diff changeset
3897 } else if(os::Linux::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Linux::get_our_sigflags(sig)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3898 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
a61af66fc99e Initial load
duke
parents:
diff changeset
3899 tty->print("expected:" PTR32_FORMAT, os::Linux::get_our_sigflags(sig));
a61af66fc99e Initial load
duke
parents:
diff changeset
3900 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
a61af66fc99e Initial load
duke
parents:
diff changeset
3901 // No need to check this sig any longer
a61af66fc99e Initial load
duke
parents:
diff changeset
3902 sigaddset(&check_signal_done, sig);
a61af66fc99e Initial load
duke
parents:
diff changeset
3903 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3904
a61af66fc99e Initial load
duke
parents:
diff changeset
3905 // Dump all the signal
a61af66fc99e Initial load
duke
parents:
diff changeset
3906 if (sigismember(&check_signal_done, sig)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3907 print_signal_handlers(tty, buf, O_BUFLEN);
a61af66fc99e Initial load
duke
parents:
diff changeset
3908 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3909 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3910
a61af66fc99e Initial load
duke
parents:
diff changeset
3911 extern void report_error(char* file_name, int line_no, char* title, char* format, ...);
a61af66fc99e Initial load
duke
parents:
diff changeset
3912
a61af66fc99e Initial load
duke
parents:
diff changeset
3913 extern bool signal_name(int signo, char* buf, size_t len);
a61af66fc99e Initial load
duke
parents:
diff changeset
3914
a61af66fc99e Initial load
duke
parents:
diff changeset
3915 const char* os::exception_name(int exception_code, char* buf, size_t size) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3916 if (0 < exception_code && exception_code <= SIGRTMAX) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3917 // signal
a61af66fc99e Initial load
duke
parents:
diff changeset
3918 if (!signal_name(exception_code, buf, size)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3919 jio_snprintf(buf, size, "SIG%d", exception_code);
a61af66fc99e Initial load
duke
parents:
diff changeset
3920 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3921 return buf;
a61af66fc99e Initial load
duke
parents:
diff changeset
3922 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3923 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3924 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3925 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3926
a61af66fc99e Initial load
duke
parents:
diff changeset
3927 // this is called _before_ the most of global arguments have been parsed
a61af66fc99e Initial load
duke
parents:
diff changeset
3928 void os::init(void) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3929 char dummy; /* used to get a guess on initial stack address */
a61af66fc99e Initial load
duke
parents:
diff changeset
3930 // first_hrtime = gethrtime();
a61af66fc99e Initial load
duke
parents:
diff changeset
3931
a61af66fc99e Initial load
duke
parents:
diff changeset
3932 // With LinuxThreads the JavaMain thread pid (primordial thread)
a61af66fc99e Initial load
duke
parents:
diff changeset
3933 // is different than the pid of the java launcher thread.
a61af66fc99e Initial load
duke
parents:
diff changeset
3934 // So, on Linux, the launcher thread pid is passed to the VM
a61af66fc99e Initial load
duke
parents:
diff changeset
3935 // via the sun.java.launcher.pid property.
a61af66fc99e Initial load
duke
parents:
diff changeset
3936 // Use this property instead of getpid() if it was correctly passed.
a61af66fc99e Initial load
duke
parents:
diff changeset
3937 // See bug 6351349.
a61af66fc99e Initial load
duke
parents:
diff changeset
3938 pid_t java_launcher_pid = (pid_t) Arguments::sun_java_launcher_pid();
a61af66fc99e Initial load
duke
parents:
diff changeset
3939
a61af66fc99e Initial load
duke
parents:
diff changeset
3940 _initial_pid = (java_launcher_pid > 0) ? java_launcher_pid : getpid();
a61af66fc99e Initial load
duke
parents:
diff changeset
3941
a61af66fc99e Initial load
duke
parents:
diff changeset
3942 clock_tics_per_sec = sysconf(_SC_CLK_TCK);
a61af66fc99e Initial load
duke
parents:
diff changeset
3943
a61af66fc99e Initial load
duke
parents:
diff changeset
3944 init_random(1234567);
a61af66fc99e Initial load
duke
parents:
diff changeset
3945
a61af66fc99e Initial load
duke
parents:
diff changeset
3946 ThreadCritical::initialize();
a61af66fc99e Initial load
duke
parents:
diff changeset
3947
a61af66fc99e Initial load
duke
parents:
diff changeset
3948 Linux::set_page_size(sysconf(_SC_PAGESIZE));
a61af66fc99e Initial load
duke
parents:
diff changeset
3949 if (Linux::page_size() == -1) {
1490
f03d0a26bf83 6888954: argument formatting for assert() and friends
jcoomes
parents: 1353
diff changeset
3950 fatal(err_msg("os_linux.cpp: os::init: sysconf failed (%s)",
f03d0a26bf83 6888954: argument formatting for assert() and friends
jcoomes
parents: 1353
diff changeset
3951 strerror(errno)));
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3952 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3953 init_page_sizes((size_t) Linux::page_size());
a61af66fc99e Initial load
duke
parents:
diff changeset
3954
a61af66fc99e Initial load
duke
parents:
diff changeset
3955 Linux::initialize_system_info();
a61af66fc99e Initial load
duke
parents:
diff changeset
3956
a61af66fc99e Initial load
duke
parents:
diff changeset
3957 // main_thread points to the aboriginal thread
a61af66fc99e Initial load
duke
parents:
diff changeset
3958 Linux::_main_thread = pthread_self();
a61af66fc99e Initial load
duke
parents:
diff changeset
3959
a61af66fc99e Initial load
duke
parents:
diff changeset
3960 Linux::clock_init();
a61af66fc99e Initial load
duke
parents:
diff changeset
3961 initial_time_count = os::elapsed_counter();
242
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 237
diff changeset
3962 pthread_mutex_init(&dl_mutex, NULL);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3963 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3964
a61af66fc99e Initial load
duke
parents:
diff changeset
3965 // To install functions for atexit system call
a61af66fc99e Initial load
duke
parents:
diff changeset
3966 extern "C" {
a61af66fc99e Initial load
duke
parents:
diff changeset
3967 static void perfMemory_exit_helper() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3968 perfMemory_exit();
a61af66fc99e Initial load
duke
parents:
diff changeset
3969 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3970 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3971
a61af66fc99e Initial load
duke
parents:
diff changeset
3972 // this is called _after_ the global arguments have been parsed
a61af66fc99e Initial load
duke
parents:
diff changeset
3973 jint os::init_2(void)
a61af66fc99e Initial load
duke
parents:
diff changeset
3974 {
a61af66fc99e Initial load
duke
parents:
diff changeset
3975 Linux::fast_thread_clock_init();
a61af66fc99e Initial load
duke
parents:
diff changeset
3976
a61af66fc99e Initial load
duke
parents:
diff changeset
3977 // Allocate a single page and mark it as readable for safepoint polling
a61af66fc99e Initial load
duke
parents:
diff changeset
3978 address polling_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3979 guarantee( polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page" );
a61af66fc99e Initial load
duke
parents:
diff changeset
3980
a61af66fc99e Initial load
duke
parents:
diff changeset
3981 os::set_polling_page( polling_page );
a61af66fc99e Initial load
duke
parents:
diff changeset
3982
a61af66fc99e Initial load
duke
parents:
diff changeset
3983 #ifndef PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
3984 if(Verbose && PrintMiscellaneous)
a61af66fc99e Initial load
duke
parents:
diff changeset
3985 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
a61af66fc99e Initial load
duke
parents:
diff changeset
3986 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
3987
a61af66fc99e Initial load
duke
parents:
diff changeset
3988 if (!UseMembar) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3989 address mem_serialize_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3990 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page");
a61af66fc99e Initial load
duke
parents:
diff changeset
3991 os::set_memory_serialize_page( mem_serialize_page );
a61af66fc99e Initial load
duke
parents:
diff changeset
3992
a61af66fc99e Initial load
duke
parents:
diff changeset
3993 #ifndef PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
3994 if(Verbose && PrintMiscellaneous)
a61af66fc99e Initial load
duke
parents:
diff changeset
3995 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
a61af66fc99e Initial load
duke
parents:
diff changeset
3996 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
3997 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3998
a61af66fc99e Initial load
duke
parents:
diff changeset
3999 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init());
a61af66fc99e Initial load
duke
parents:
diff changeset
4000
a61af66fc99e Initial load
duke
parents:
diff changeset
4001 // initialize suspend/resume support - must do this before signal_sets_init()
a61af66fc99e Initial load
duke
parents:
diff changeset
4002 if (SR_initialize() != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4003 perror("SR_initialize failed");
a61af66fc99e Initial load
duke
parents:
diff changeset
4004 return JNI_ERR;
a61af66fc99e Initial load
duke
parents:
diff changeset
4005 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4006
a61af66fc99e Initial load
duke
parents:
diff changeset
4007 Linux::signal_sets_init();
a61af66fc99e Initial load
duke
parents:
diff changeset
4008 Linux::install_signal_handlers();
a61af66fc99e Initial load
duke
parents:
diff changeset
4009
1867
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
4010 // Check minimum allowable stack size for thread creation and to initialize
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
4011 // the java system classes, including StackOverflowError - depends on page
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
4012 // size. Add a page for compiler2 recursion in main thread.
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
4013 // Add in 2*BytesPerWord times page size to account for VM stack during
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
4014 // class initialization depending on 32 or 64 bit VM.
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
4015 os::Linux::min_stack_allowed = MAX2(os::Linux::min_stack_allowed,
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
4016 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
4017 2*BytesPerWord COMPILER2_PRESENT(+1)) * Linux::page_size());
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
4018
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4019 size_t threadStackSizeInBytes = ThreadStackSize * K;
a61af66fc99e Initial load
duke
parents:
diff changeset
4020 if (threadStackSizeInBytes != 0 &&
1867
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
4021 threadStackSizeInBytes < os::Linux::min_stack_allowed) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4022 tty->print_cr("\nThe stack size specified is too small, "
a61af66fc99e Initial load
duke
parents:
diff changeset
4023 "Specify at least %dk",
1867
b6aedd1acdc0 6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents: 1865
diff changeset
4024 os::Linux::min_stack_allowed/ K);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4025 return JNI_ERR;
a61af66fc99e Initial load
duke
parents:
diff changeset
4026 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4027
a61af66fc99e Initial load
duke
parents:
diff changeset
4028 // Make the stack size a multiple of the page size so that
a61af66fc99e Initial load
duke
parents:
diff changeset
4029 // the yellow/red zones can be guarded.
a61af66fc99e Initial load
duke
parents:
diff changeset
4030 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
a61af66fc99e Initial load
duke
parents:
diff changeset
4031 vm_page_size()));
a61af66fc99e Initial load
duke
parents:
diff changeset
4032
a61af66fc99e Initial load
duke
parents:
diff changeset
4033 Linux::capture_initial_stack(JavaThread::stack_size_at_create());
a61af66fc99e Initial load
duke
parents:
diff changeset
4034
a61af66fc99e Initial load
duke
parents:
diff changeset
4035 Linux::libpthread_init();
a61af66fc99e Initial load
duke
parents:
diff changeset
4036 if (PrintMiscellaneous && (Verbose || WizardMode)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4037 tty->print_cr("[HotSpot is running with %s, %s(%s)]\n",
a61af66fc99e Initial load
duke
parents:
diff changeset
4038 Linux::glibc_version(), Linux::libpthread_version(),
a61af66fc99e Initial load
duke
parents:
diff changeset
4039 Linux::is_floating_stack() ? "floating stack" : "fixed stack");
a61af66fc99e Initial load
duke
parents:
diff changeset
4040 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4041
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
4042 if (UseNUMA) {
462
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
4043 if (!Linux::libnuma_init()) {
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
4044 UseNUMA = false;
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
4045 } else {
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
4046 if ((Linux::numa_max_node() < 1)) {
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
4047 // There's only one node(they start from 0), disable NUMA.
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
4048 UseNUMA = false;
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
4049 }
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
4050 }
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
4051 if (!UseNUMA && ForceNUMA) {
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
4052 UseNUMA = true;
85f1b9537f70 6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents: 356
diff changeset
4053 }
141
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
4054 }
fcbfc50865ab 6684395: Port NUMA-aware allocator to linux
iveresov
parents: 79
diff changeset
4055
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4056 if (MaxFDLimit) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4057 // set the number of file descriptors to max. print out error
a61af66fc99e Initial load
duke
parents:
diff changeset
4058 // if getrlimit/setrlimit fails but continue regardless.
a61af66fc99e Initial load
duke
parents:
diff changeset
4059 struct rlimit nbr_files;
a61af66fc99e Initial load
duke
parents:
diff changeset
4060 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
a61af66fc99e Initial load
duke
parents:
diff changeset
4061 if (status != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4062 if (PrintMiscellaneous && (Verbose || WizardMode))
a61af66fc99e Initial load
duke
parents:
diff changeset
4063 perror("os::init_2 getrlimit failed");
a61af66fc99e Initial load
duke
parents:
diff changeset
4064 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4065 nbr_files.rlim_cur = nbr_files.rlim_max;
a61af66fc99e Initial load
duke
parents:
diff changeset
4066 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
a61af66fc99e Initial load
duke
parents:
diff changeset
4067 if (status != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4068 if (PrintMiscellaneous && (Verbose || WizardMode))
a61af66fc99e Initial load
duke
parents:
diff changeset
4069 perror("os::init_2 setrlimit failed");
a61af66fc99e Initial load
duke
parents:
diff changeset
4070 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4071 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4072 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4073
a61af66fc99e Initial load
duke
parents:
diff changeset
4074 // Initialize lock used to serialize thread creation (see os::create_thread)
a61af66fc99e Initial load
duke
parents:
diff changeset
4075 Linux::set_createThread_lock(new Mutex(Mutex::leaf, "createThread_lock", false));
a61af66fc99e Initial load
duke
parents:
diff changeset
4076
a61af66fc99e Initial load
duke
parents:
diff changeset
4077 // at-exit methods are called in the reverse order of their registration.
a61af66fc99e Initial load
duke
parents:
diff changeset
4078 // atexit functions are called on return from main or as a result of a
a61af66fc99e Initial load
duke
parents:
diff changeset
4079 // call to exit(3C). There can be only 32 of these functions registered
a61af66fc99e Initial load
duke
parents:
diff changeset
4080 // and atexit() does not set errno.
a61af66fc99e Initial load
duke
parents:
diff changeset
4081
a61af66fc99e Initial load
duke
parents:
diff changeset
4082 if (PerfAllowAtExitRegistration) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4083 // only register atexit functions if PerfAllowAtExitRegistration is set.
a61af66fc99e Initial load
duke
parents:
diff changeset
4084 // atexit functions can be delayed until process exit time, which
a61af66fc99e Initial load
duke
parents:
diff changeset
4085 // can be problematic for embedded VM situations. Embedded VMs should
a61af66fc99e Initial load
duke
parents:
diff changeset
4086 // call DestroyJavaVM() to assure that VM resources are released.
a61af66fc99e Initial load
duke
parents:
diff changeset
4087
a61af66fc99e Initial load
duke
parents:
diff changeset
4088 // note: perfMemory_exit_helper atexit function may be removed in
a61af66fc99e Initial load
duke
parents:
diff changeset
4089 // the future if the appropriate cleanup code can be added to the
a61af66fc99e Initial load
duke
parents:
diff changeset
4090 // VM_Exit VMOperation's doit method.
a61af66fc99e Initial load
duke
parents:
diff changeset
4091 if (atexit(perfMemory_exit_helper) != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4092 warning("os::init2 atexit(perfMemory_exit_helper) failed");
a61af66fc99e Initial load
duke
parents:
diff changeset
4093 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4094 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4095
a61af66fc99e Initial load
duke
parents:
diff changeset
4096 // initialize thread priority policy
a61af66fc99e Initial load
duke
parents:
diff changeset
4097 prio_init();
a61af66fc99e Initial load
duke
parents:
diff changeset
4098
a61af66fc99e Initial load
duke
parents:
diff changeset
4099 return JNI_OK;
a61af66fc99e Initial load
duke
parents:
diff changeset
4100 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4101
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4102 // this is called at the end of vm_initialization
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4103 void os::init_3(void) { }
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4104
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4105 // Mark the polling page as unreadable
a61af66fc99e Initial load
duke
parents:
diff changeset
4106 void os::make_polling_page_unreadable(void) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4107 if( !guard_memory((char*)_polling_page, Linux::page_size()) )
a61af66fc99e Initial load
duke
parents:
diff changeset
4108 fatal("Could not disable polling page");
a61af66fc99e Initial load
duke
parents:
diff changeset
4109 };
a61af66fc99e Initial load
duke
parents:
diff changeset
4110
a61af66fc99e Initial load
duke
parents:
diff changeset
4111 // Mark the polling page as readable
a61af66fc99e Initial load
duke
parents:
diff changeset
4112 void os::make_polling_page_readable(void) {
237
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
4113 if( !linux_mprotect((char *)_polling_page, Linux::page_size(), PROT_READ)) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4114 fatal("Could not enable polling page");
237
1fdb98a17101 6716785: implicit null checks not triggering with CompressedOops
coleenp
parents: 235
diff changeset
4115 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4116 };
a61af66fc99e Initial load
duke
parents:
diff changeset
4117
a61af66fc99e Initial load
duke
parents:
diff changeset
4118 int os::active_processor_count() {
a61af66fc99e Initial load
duke
parents:
diff changeset
4119 // Linux doesn't yet have a (official) notion of processor sets,
a61af66fc99e Initial load
duke
parents:
diff changeset
4120 // so just return the number of online processors.
a61af66fc99e Initial load
duke
parents:
diff changeset
4121 int online_cpus = ::sysconf(_SC_NPROCESSORS_ONLN);
a61af66fc99e Initial load
duke
parents:
diff changeset
4122 assert(online_cpus > 0 && online_cpus <= processor_count(), "sanity check");
a61af66fc99e Initial load
duke
parents:
diff changeset
4123 return online_cpus;
a61af66fc99e Initial load
duke
parents:
diff changeset
4124 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4125
a61af66fc99e Initial load
duke
parents:
diff changeset
4126 bool os::distribute_processes(uint length, uint* distribution) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4127 // Not yet implemented.
a61af66fc99e Initial load
duke
parents:
diff changeset
4128 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
4129 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4130
a61af66fc99e Initial load
duke
parents:
diff changeset
4131 bool os::bind_to_processor(uint processor_id) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4132 // Not yet implemented.
a61af66fc99e Initial load
duke
parents:
diff changeset
4133 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
4134 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4135
a61af66fc99e Initial load
duke
parents:
diff changeset
4136 ///
a61af66fc99e Initial load
duke
parents:
diff changeset
4137
a61af66fc99e Initial load
duke
parents:
diff changeset
4138 // Suspends the target using the signal mechanism and then grabs the PC before
a61af66fc99e Initial load
duke
parents:
diff changeset
4139 // resuming the target. Used by the flat-profiler only
a61af66fc99e Initial load
duke
parents:
diff changeset
4140 ExtendedPC os::get_thread_pc(Thread* thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4141 // Make sure that it is called by the watcher for the VMThread
a61af66fc99e Initial load
duke
parents:
diff changeset
4142 assert(Thread::current()->is_Watcher_thread(), "Must be watcher");
a61af66fc99e Initial load
duke
parents:
diff changeset
4143 assert(thread->is_VM_thread(), "Can only be called for VMThread");
a61af66fc99e Initial load
duke
parents:
diff changeset
4144
a61af66fc99e Initial load
duke
parents:
diff changeset
4145 ExtendedPC epc;
a61af66fc99e Initial load
duke
parents:
diff changeset
4146
a61af66fc99e Initial load
duke
parents:
diff changeset
4147 OSThread* osthread = thread->osthread();
a61af66fc99e Initial load
duke
parents:
diff changeset
4148 if (do_suspend(osthread)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4149 if (osthread->ucontext() != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4150 epc = os::Linux::ucontext_get_pc(osthread->ucontext());
a61af66fc99e Initial load
duke
parents:
diff changeset
4151 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4152 // NULL context is unexpected, double-check this is the VMThread
a61af66fc99e Initial load
duke
parents:
diff changeset
4153 guarantee(thread->is_VM_thread(), "can only be called for VMThread");
a61af66fc99e Initial load
duke
parents:
diff changeset
4154 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4155 do_resume(osthread);
a61af66fc99e Initial load
duke
parents:
diff changeset
4156 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4157 // failure means pthread_kill failed for some reason - arguably this is
a61af66fc99e Initial load
duke
parents:
diff changeset
4158 // a fatal problem, but such problems are ignored elsewhere
a61af66fc99e Initial load
duke
parents:
diff changeset
4159
a61af66fc99e Initial load
duke
parents:
diff changeset
4160 return epc;
a61af66fc99e Initial load
duke
parents:
diff changeset
4161 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4162
a61af66fc99e Initial load
duke
parents:
diff changeset
4163 int os::Linux::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime)
a61af66fc99e Initial load
duke
parents:
diff changeset
4164 {
a61af66fc99e Initial load
duke
parents:
diff changeset
4165 if (is_NPTL()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4166 return pthread_cond_timedwait(_cond, _mutex, _abstime);
a61af66fc99e Initial load
duke
parents:
diff changeset
4167 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4168 #ifndef IA64
a61af66fc99e Initial load
duke
parents:
diff changeset
4169 // 6292965: LinuxThreads pthread_cond_timedwait() resets FPU control
a61af66fc99e Initial load
duke
parents:
diff changeset
4170 // word back to default 64bit precision if condvar is signaled. Java
a61af66fc99e Initial load
duke
parents:
diff changeset
4171 // wants 53bit precision. Save and restore current value.
a61af66fc99e Initial load
duke
parents:
diff changeset
4172 int fpu = get_fpu_control_word();
a61af66fc99e Initial load
duke
parents:
diff changeset
4173 #endif // IA64
a61af66fc99e Initial load
duke
parents:
diff changeset
4174 int status = pthread_cond_timedwait(_cond, _mutex, _abstime);
a61af66fc99e Initial load
duke
parents:
diff changeset
4175 #ifndef IA64
a61af66fc99e Initial load
duke
parents:
diff changeset
4176 set_fpu_control_word(fpu);
a61af66fc99e Initial load
duke
parents:
diff changeset
4177 #endif // IA64
a61af66fc99e Initial load
duke
parents:
diff changeset
4178 return status;
a61af66fc99e Initial load
duke
parents:
diff changeset
4179 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4180 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4181
a61af66fc99e Initial load
duke
parents:
diff changeset
4182 ////////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
4183 // debug support
a61af66fc99e Initial load
duke
parents:
diff changeset
4184
a61af66fc99e Initial load
duke
parents:
diff changeset
4185 static address same_page(address x, address y) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4186 int page_bits = -os::vm_page_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
4187 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits))
a61af66fc99e Initial load
duke
parents:
diff changeset
4188 return x;
a61af66fc99e Initial load
duke
parents:
diff changeset
4189 else if (x > y)
a61af66fc99e Initial load
duke
parents:
diff changeset
4190 return (address)(intptr_t(y) | ~page_bits) + 1;
a61af66fc99e Initial load
duke
parents:
diff changeset
4191 else
a61af66fc99e Initial load
duke
parents:
diff changeset
4192 return (address)(intptr_t(y) & page_bits);
a61af66fc99e Initial load
duke
parents:
diff changeset
4193 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4194
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4195 bool os::find(address addr, outputStream* st) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4196 Dl_info dlinfo;
a61af66fc99e Initial load
duke
parents:
diff changeset
4197 memset(&dlinfo, 0, sizeof(dlinfo));
a61af66fc99e Initial load
duke
parents:
diff changeset
4198 if (dladdr(addr, &dlinfo)) {
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4199 st->print(PTR_FORMAT ": ", addr);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4200 if (dlinfo.dli_sname != NULL) {
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4201 st->print("%s+%#x", dlinfo.dli_sname,
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4202 addr - (intptr_t)dlinfo.dli_saddr);
a61af66fc99e Initial load
duke
parents:
diff changeset
4203 } else if (dlinfo.dli_fname) {
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4204 st->print("<offset %#x>", addr - (intptr_t)dlinfo.dli_fbase);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4205 } else {
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4206 st->print("<absolute address>");
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4207 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4208 if (dlinfo.dli_fname) {
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4209 st->print(" in %s", dlinfo.dli_fname);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4210 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4211 if (dlinfo.dli_fbase) {
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4212 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4213 }
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4214 st->cr();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4215
a61af66fc99e Initial load
duke
parents:
diff changeset
4216 if (Verbose) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4217 // decode some bytes around the PC
a61af66fc99e Initial load
duke
parents:
diff changeset
4218 address begin = same_page(addr-40, addr);
a61af66fc99e Initial load
duke
parents:
diff changeset
4219 address end = same_page(addr+40, addr);
a61af66fc99e Initial load
duke
parents:
diff changeset
4220 address lowest = (address) dlinfo.dli_sname;
a61af66fc99e Initial load
duke
parents:
diff changeset
4221 if (!lowest) lowest = (address) dlinfo.dli_fbase;
a61af66fc99e Initial load
duke
parents:
diff changeset
4222 if (begin < lowest) begin = lowest;
a61af66fc99e Initial load
duke
parents:
diff changeset
4223 Dl_info dlinfo2;
a61af66fc99e Initial load
duke
parents:
diff changeset
4224 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
a61af66fc99e Initial load
duke
parents:
diff changeset
4225 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
a61af66fc99e Initial load
duke
parents:
diff changeset
4226 end = (address) dlinfo2.dli_saddr;
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4227 Disassembler::decode(begin, end, st);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4228 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4229 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
4230 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4231 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
4232 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4233
a61af66fc99e Initial load
duke
parents:
diff changeset
4234 ////////////////////////////////////////////////////////////////////////////////
a61af66fc99e Initial load
duke
parents:
diff changeset
4235 // misc
a61af66fc99e Initial load
duke
parents:
diff changeset
4236
a61af66fc99e Initial load
duke
parents:
diff changeset
4237 // This does not do anything on Linux. This is basically a hook for being
a61af66fc99e Initial load
duke
parents:
diff changeset
4238 // able to use structured exception handling (thread-local exception filters)
a61af66fc99e Initial load
duke
parents:
diff changeset
4239 // on, e.g., Win32.
a61af66fc99e Initial load
duke
parents:
diff changeset
4240 void
a61af66fc99e Initial load
duke
parents:
diff changeset
4241 os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method,
a61af66fc99e Initial load
duke
parents:
diff changeset
4242 JavaCallArguments* args, Thread* thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4243 f(value, method, args, thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
4244 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4245
a61af66fc99e Initial load
duke
parents:
diff changeset
4246 void os::print_statistics() {
a61af66fc99e Initial load
duke
parents:
diff changeset
4247 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4248
a61af66fc99e Initial load
duke
parents:
diff changeset
4249 int os::message_box(const char* title, const char* message) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4250 int i;
a61af66fc99e Initial load
duke
parents:
diff changeset
4251 fdStream err(defaultStream::error_fd());
a61af66fc99e Initial load
duke
parents:
diff changeset
4252 for (i = 0; i < 78; i++) err.print_raw("=");
a61af66fc99e Initial load
duke
parents:
diff changeset
4253 err.cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
4254 err.print_raw_cr(title);
a61af66fc99e Initial load
duke
parents:
diff changeset
4255 for (i = 0; i < 78; i++) err.print_raw("-");
a61af66fc99e Initial load
duke
parents:
diff changeset
4256 err.cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
4257 err.print_raw_cr(message);
a61af66fc99e Initial load
duke
parents:
diff changeset
4258 for (i = 0; i < 78; i++) err.print_raw("=");
a61af66fc99e Initial load
duke
parents:
diff changeset
4259 err.cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
4260
a61af66fc99e Initial load
duke
parents:
diff changeset
4261 char buf[16];
a61af66fc99e Initial load
duke
parents:
diff changeset
4262 // Prevent process from exiting upon "read error" without consuming all CPU
a61af66fc99e Initial load
duke
parents:
diff changeset
4263 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
a61af66fc99e Initial load
duke
parents:
diff changeset
4264
a61af66fc99e Initial load
duke
parents:
diff changeset
4265 return buf[0] == 'y' || buf[0] == 'Y';
a61af66fc99e Initial load
duke
parents:
diff changeset
4266 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4267
a61af66fc99e Initial load
duke
parents:
diff changeset
4268 int os::stat(const char *path, struct stat *sbuf) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4269 char pathbuf[MAX_PATH];
a61af66fc99e Initial load
duke
parents:
diff changeset
4270 if (strlen(path) > MAX_PATH - 1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4271 errno = ENAMETOOLONG;
a61af66fc99e Initial load
duke
parents:
diff changeset
4272 return -1;
a61af66fc99e Initial load
duke
parents:
diff changeset
4273 }
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4274 os::native_path(strcpy(pathbuf, path));
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4275 return ::stat(pathbuf, sbuf);
a61af66fc99e Initial load
duke
parents:
diff changeset
4276 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4277
a61af66fc99e Initial load
duke
parents:
diff changeset
4278 bool os::check_heap(bool force) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4279 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
4280 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4281
a61af66fc99e Initial load
duke
parents:
diff changeset
4282 int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4283 return ::vsnprintf(buf, count, format, args);
a61af66fc99e Initial load
duke
parents:
diff changeset
4284 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4285
a61af66fc99e Initial load
duke
parents:
diff changeset
4286 // Is a (classpath) directory empty?
a61af66fc99e Initial load
duke
parents:
diff changeset
4287 bool os::dir_is_empty(const char* path) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4288 DIR *dir = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
4289 struct dirent *ptr;
a61af66fc99e Initial load
duke
parents:
diff changeset
4290
a61af66fc99e Initial load
duke
parents:
diff changeset
4291 dir = opendir(path);
a61af66fc99e Initial load
duke
parents:
diff changeset
4292 if (dir == NULL) return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
4293
a61af66fc99e Initial load
duke
parents:
diff changeset
4294 /* Scan the directory */
a61af66fc99e Initial load
duke
parents:
diff changeset
4295 bool result = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
4296 char buf[sizeof(struct dirent) + MAX_PATH];
a61af66fc99e Initial load
duke
parents:
diff changeset
4297 while (result && (ptr = ::readdir(dir)) != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4298 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4299 result = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
4300 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4301 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4302 closedir(dir);
a61af66fc99e Initial load
duke
parents:
diff changeset
4303 return result;
a61af66fc99e Initial load
duke
parents:
diff changeset
4304 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4305
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4306 // This code originates from JDK's sysOpen and open64_w
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4307 // from src/solaris/hpi/src/system_md.c
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4308
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4309 #ifndef O_DELETE
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4310 #define O_DELETE 0x10000
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4311 #endif
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4312
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4313 // Open a file. Unlink the file immediately after open returns
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4314 // if the specified oflag has the O_DELETE flag set.
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4315 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4316
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4317 int os::open(const char *path, int oflag, int mode) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4318
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4319 if (strlen(path) > MAX_PATH - 1) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4320 errno = ENAMETOOLONG;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4321 return -1;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4322 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4323 int fd;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4324 int o_delete = (oflag & O_DELETE);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4325 oflag = oflag & ~O_DELETE;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4326
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4327 fd = ::open64(path, oflag, mode);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4328 if (fd == -1) return -1;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4329
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4330 //If the open succeeded, the file might still be a directory
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4331 {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4332 struct stat64 buf64;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4333 int ret = ::fstat64(fd, &buf64);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4334 int st_mode = buf64.st_mode;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4335
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4336 if (ret != -1) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4337 if ((st_mode & S_IFMT) == S_IFDIR) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4338 errno = EISDIR;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4339 ::close(fd);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4340 return -1;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4341 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4342 } else {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4343 ::close(fd);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4344 return -1;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4345 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4346 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4347
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4348 /*
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4349 * All file descriptors that are opened in the JVM and not
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4350 * specifically destined for a subprocess should have the
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4351 * close-on-exec flag set. If we don't set it, then careless 3rd
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4352 * party native code might fork and exec without closing all
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4353 * appropriate file descriptors (e.g. as we do in closeDescriptors in
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4354 * UNIXProcess.c), and this in turn might:
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4355 *
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4356 * - cause end-of-file to fail to be detected on some file
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4357 * descriptors, resulting in mysterious hangs, or
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4358 *
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4359 * - might cause an fopen in the subprocess to fail on a system
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4360 * suffering from bug 1085341.
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4361 *
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4362 * (Yes, the default setting of the close-on-exec flag is a Unix
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4363 * design flaw)
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4364 *
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4365 * See:
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4366 * 1085341: 32-bit stdio routines should support file descriptors >255
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4367 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4368 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4369 */
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4370 #ifdef FD_CLOEXEC
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4371 {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4372 int flags = ::fcntl(fd, F_GETFD);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4373 if (flags != -1)
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4374 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4375 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4376 #endif
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4377
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4378 if (o_delete != 0) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4379 ::unlink(path);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4380 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4381 return fd;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4382 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4383
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4384
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4385 // create binary file, rewriting existing file if required
a61af66fc99e Initial load
duke
parents:
diff changeset
4386 int os::create_binary_file(const char* path, bool rewrite_existing) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4387 int oflags = O_WRONLY | O_CREAT;
a61af66fc99e Initial load
duke
parents:
diff changeset
4388 if (!rewrite_existing) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4389 oflags |= O_EXCL;
a61af66fc99e Initial load
duke
parents:
diff changeset
4390 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4391 return ::open64(path, oflags, S_IREAD | S_IWRITE);
a61af66fc99e Initial load
duke
parents:
diff changeset
4392 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4393
a61af66fc99e Initial load
duke
parents:
diff changeset
4394 // return current position of file pointer
a61af66fc99e Initial load
duke
parents:
diff changeset
4395 jlong os::current_file_offset(int fd) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4396 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
a61af66fc99e Initial load
duke
parents:
diff changeset
4397 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4398
a61af66fc99e Initial load
duke
parents:
diff changeset
4399 // move file pointer to the specified offset
a61af66fc99e Initial load
duke
parents:
diff changeset
4400 jlong os::seek_to_file_offset(int fd, jlong offset) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4401 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
a61af66fc99e Initial load
duke
parents:
diff changeset
4402 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4403
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4404 // This code originates from JDK's sysAvailable
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4405 // from src/solaris/hpi/src/native_threads/src/sys_api_td.c
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4406
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4407 int os::available(int fd, jlong *bytes) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4408 jlong cur, end;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4409 int mode;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4410 struct stat64 buf64;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4411
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4412 if (::fstat64(fd, &buf64) >= 0) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4413 mode = buf64.st_mode;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4414 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4415 /*
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4416 * XXX: is the following call interruptible? If so, this might
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4417 * need to go through the INTERRUPT_IO() wrapper as for other
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4418 * blocking, interruptible calls in this file.
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4419 */
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4420 int n;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4421 if (::ioctl(fd, FIONREAD, &n) >= 0) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4422 *bytes = n;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4423 return 1;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4424 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4425 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4426 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4427 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4428 return 0;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4429 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4430 return 0;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4431 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4432 return 0;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4433 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4434 *bytes = end - cur;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4435 return 1;
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4436 }
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4437
2033
03e1b9fce89d 7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents: 2023
diff changeset
4438 int os::socket_available(int fd, jint *pbytes) {
03e1b9fce89d 7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents: 2023
diff changeset
4439 // Linux doc says EINTR not returned, unlike Solaris
03e1b9fce89d 7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents: 2023
diff changeset
4440 int ret = ::ioctl(fd, FIONREAD, pbytes);
03e1b9fce89d 7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents: 2023
diff changeset
4441
03e1b9fce89d 7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents: 2023
diff changeset
4442 //%% note ioctl can return 0 when successful, JVM_SocketAvailable
03e1b9fce89d 7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents: 2023
diff changeset
4443 // is expected to return 0 on failure and 1 on success to the jdk.
03e1b9fce89d 7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents: 2023
diff changeset
4444 return (ret < 0) ? 0 : 1;
03e1b9fce89d 7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents: 2023
diff changeset
4445 }
03e1b9fce89d 7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents: 2023
diff changeset
4446
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4447 // Map a block of memory.
a61af66fc99e Initial load
duke
parents:
diff changeset
4448 char* os::map_memory(int fd, const char* file_name, size_t file_offset,
a61af66fc99e Initial load
duke
parents:
diff changeset
4449 char *addr, size_t bytes, bool read_only,
a61af66fc99e Initial load
duke
parents:
diff changeset
4450 bool allow_exec) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4451 int prot;
a61af66fc99e Initial load
duke
parents:
diff changeset
4452 int flags;
a61af66fc99e Initial load
duke
parents:
diff changeset
4453
a61af66fc99e Initial load
duke
parents:
diff changeset
4454 if (read_only) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4455 prot = PROT_READ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4456 flags = MAP_SHARED;
a61af66fc99e Initial load
duke
parents:
diff changeset
4457 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4458 prot = PROT_READ | PROT_WRITE;
a61af66fc99e Initial load
duke
parents:
diff changeset
4459 flags = MAP_PRIVATE;
a61af66fc99e Initial load
duke
parents:
diff changeset
4460 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4461
a61af66fc99e Initial load
duke
parents:
diff changeset
4462 if (allow_exec) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4463 prot |= PROT_EXEC;
a61af66fc99e Initial load
duke
parents:
diff changeset
4464 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4465
a61af66fc99e Initial load
duke
parents:
diff changeset
4466 if (addr != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4467 flags |= MAP_FIXED;
a61af66fc99e Initial load
duke
parents:
diff changeset
4468 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4469
a61af66fc99e Initial load
duke
parents:
diff changeset
4470 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
a61af66fc99e Initial load
duke
parents:
diff changeset
4471 fd, file_offset);
a61af66fc99e Initial load
duke
parents:
diff changeset
4472 if (mapped_address == MAP_FAILED) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4473 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
4474 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4475 return mapped_address;
a61af66fc99e Initial load
duke
parents:
diff changeset
4476 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4477
a61af66fc99e Initial load
duke
parents:
diff changeset
4478
a61af66fc99e Initial load
duke
parents:
diff changeset
4479 // Remap a block of memory.
a61af66fc99e Initial load
duke
parents:
diff changeset
4480 char* os::remap_memory(int fd, const char* file_name, size_t file_offset,
a61af66fc99e Initial load
duke
parents:
diff changeset
4481 char *addr, size_t bytes, bool read_only,
a61af66fc99e Initial load
duke
parents:
diff changeset
4482 bool allow_exec) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4483 // same as map_memory() on this OS
a61af66fc99e Initial load
duke
parents:
diff changeset
4484 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
a61af66fc99e Initial load
duke
parents:
diff changeset
4485 allow_exec);
a61af66fc99e Initial load
duke
parents:
diff changeset
4486 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4487
a61af66fc99e Initial load
duke
parents:
diff changeset
4488
a61af66fc99e Initial load
duke
parents:
diff changeset
4489 // Unmap a block of memory.
a61af66fc99e Initial load
duke
parents:
diff changeset
4490 bool os::unmap_memory(char* addr, size_t bytes) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4491 return munmap(addr, bytes) == 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
4492 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4493
a61af66fc99e Initial load
duke
parents:
diff changeset
4494 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time);
a61af66fc99e Initial load
duke
parents:
diff changeset
4495
a61af66fc99e Initial load
duke
parents:
diff changeset
4496 static clockid_t thread_cpu_clockid(Thread* thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4497 pthread_t tid = thread->osthread()->pthread_id();
a61af66fc99e Initial load
duke
parents:
diff changeset
4498 clockid_t clockid;
a61af66fc99e Initial load
duke
parents:
diff changeset
4499
a61af66fc99e Initial load
duke
parents:
diff changeset
4500 // Get thread clockid
a61af66fc99e Initial load
duke
parents:
diff changeset
4501 int rc = os::Linux::pthread_getcpuclockid(tid, &clockid);
a61af66fc99e Initial load
duke
parents:
diff changeset
4502 assert(rc == 0, "pthread_getcpuclockid is expected to return 0 code");
a61af66fc99e Initial load
duke
parents:
diff changeset
4503 return clockid;
a61af66fc99e Initial load
duke
parents:
diff changeset
4504 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4505
a61af66fc99e Initial load
duke
parents:
diff changeset
4506 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
a61af66fc99e Initial load
duke
parents:
diff changeset
4507 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
a61af66fc99e Initial load
duke
parents:
diff changeset
4508 // of a thread.
a61af66fc99e Initial load
duke
parents:
diff changeset
4509 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4510 // current_thread_cpu_time() and thread_cpu_time(Thread*) returns
a61af66fc99e Initial load
duke
parents:
diff changeset
4511 // the fast estimate available on the platform.
a61af66fc99e Initial load
duke
parents:
diff changeset
4512
a61af66fc99e Initial load
duke
parents:
diff changeset
4513 jlong os::current_thread_cpu_time() {
a61af66fc99e Initial load
duke
parents:
diff changeset
4514 if (os::Linux::supports_fast_thread_cpu_time()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4515 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID);
a61af66fc99e Initial load
duke
parents:
diff changeset
4516 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4517 // return user + sys since the cost is the same
a61af66fc99e Initial load
duke
parents:
diff changeset
4518 return slow_thread_cpu_time(Thread::current(), true /* user + sys */);
a61af66fc99e Initial load
duke
parents:
diff changeset
4519 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4520 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4521
a61af66fc99e Initial load
duke
parents:
diff changeset
4522 jlong os::thread_cpu_time(Thread* thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4523 // consistent with what current_thread_cpu_time() returns
a61af66fc99e Initial load
duke
parents:
diff changeset
4524 if (os::Linux::supports_fast_thread_cpu_time()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4525 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread));
a61af66fc99e Initial load
duke
parents:
diff changeset
4526 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4527 return slow_thread_cpu_time(thread, true /* user + sys */);
a61af66fc99e Initial load
duke
parents:
diff changeset
4528 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4529 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4530
a61af66fc99e Initial load
duke
parents:
diff changeset
4531 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4532 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4533 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID);
a61af66fc99e Initial load
duke
parents:
diff changeset
4534 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4535 return slow_thread_cpu_time(Thread::current(), user_sys_cpu_time);
a61af66fc99e Initial load
duke
parents:
diff changeset
4536 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4537 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4538
a61af66fc99e Initial load
duke
parents:
diff changeset
4539 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4540 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4541 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread));
a61af66fc99e Initial load
duke
parents:
diff changeset
4542 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4543 return slow_thread_cpu_time(thread, user_sys_cpu_time);
a61af66fc99e Initial load
duke
parents:
diff changeset
4544 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4545 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4546
a61af66fc99e Initial load
duke
parents:
diff changeset
4547 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4548 // -1 on error.
a61af66fc99e Initial load
duke
parents:
diff changeset
4549 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4550
a61af66fc99e Initial load
duke
parents:
diff changeset
4551 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4552 static bool proc_pid_cpu_avail = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
4553 static bool proc_task_unchecked = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
4554 static const char *proc_stat_path = "/proc/%d/stat";
a61af66fc99e Initial load
duke
parents:
diff changeset
4555 pid_t tid = thread->osthread()->thread_id();
a61af66fc99e Initial load
duke
parents:
diff changeset
4556 int i;
a61af66fc99e Initial load
duke
parents:
diff changeset
4557 char *s;
a61af66fc99e Initial load
duke
parents:
diff changeset
4558 char stat[2048];
a61af66fc99e Initial load
duke
parents:
diff changeset
4559 int statlen;
a61af66fc99e Initial load
duke
parents:
diff changeset
4560 char proc_name[64];
a61af66fc99e Initial load
duke
parents:
diff changeset
4561 int count;
a61af66fc99e Initial load
duke
parents:
diff changeset
4562 long sys_time, user_time;
a61af66fc99e Initial load
duke
parents:
diff changeset
4563 char string[64];
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4564 char cdummy;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4565 int idummy;
a61af66fc99e Initial load
duke
parents:
diff changeset
4566 long ldummy;
a61af66fc99e Initial load
duke
parents:
diff changeset
4567 FILE *fp;
a61af66fc99e Initial load
duke
parents:
diff changeset
4568
a61af66fc99e Initial load
duke
parents:
diff changeset
4569 // We first try accessing /proc/<pid>/cpu since this is faster to
a61af66fc99e Initial load
duke
parents:
diff changeset
4570 // process. If this file is not present (linux kernels 2.5 and above)
a61af66fc99e Initial load
duke
parents:
diff changeset
4571 // then we open /proc/<pid>/stat.
a61af66fc99e Initial load
duke
parents:
diff changeset
4572 if ( proc_pid_cpu_avail ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4573 sprintf(proc_name, "/proc/%d/cpu", tid);
a61af66fc99e Initial load
duke
parents:
diff changeset
4574 fp = fopen(proc_name, "r");
a61af66fc99e Initial load
duke
parents:
diff changeset
4575 if ( fp != NULL ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4576 count = fscanf( fp, "%s %lu %lu\n", string, &user_time, &sys_time);
a61af66fc99e Initial load
duke
parents:
diff changeset
4577 fclose(fp);
a61af66fc99e Initial load
duke
parents:
diff changeset
4578 if ( count != 3 ) return -1;
a61af66fc99e Initial load
duke
parents:
diff changeset
4579
a61af66fc99e Initial load
duke
parents:
diff changeset
4580 if (user_sys_cpu_time) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4581 return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec);
a61af66fc99e Initial load
duke
parents:
diff changeset
4582 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4583 return (jlong)user_time * (1000000000 / clock_tics_per_sec);
a61af66fc99e Initial load
duke
parents:
diff changeset
4584 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4585 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4586 else proc_pid_cpu_avail = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
4587 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4588
a61af66fc99e Initial load
duke
parents:
diff changeset
4589 // The /proc/<tid>/stat aggregates per-process usage on
a61af66fc99e Initial load
duke
parents:
diff changeset
4590 // new Linux kernels 2.6+ where NPTL is supported.
a61af66fc99e Initial load
duke
parents:
diff changeset
4591 // The /proc/self/task/<tid>/stat still has the per-thread usage.
a61af66fc99e Initial load
duke
parents:
diff changeset
4592 // See bug 6328462.
a61af66fc99e Initial load
duke
parents:
diff changeset
4593 // There can be no directory /proc/self/task on kernels 2.4 with NPTL
a61af66fc99e Initial load
duke
parents:
diff changeset
4594 // and possibly in some other cases, so we check its availability.
a61af66fc99e Initial load
duke
parents:
diff changeset
4595 if (proc_task_unchecked && os::Linux::is_NPTL()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4596 // This is executed only once
a61af66fc99e Initial load
duke
parents:
diff changeset
4597 proc_task_unchecked = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
4598 fp = fopen("/proc/self/task", "r");
a61af66fc99e Initial load
duke
parents:
diff changeset
4599 if (fp != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4600 proc_stat_path = "/proc/self/task/%d/stat";
a61af66fc99e Initial load
duke
parents:
diff changeset
4601 fclose(fp);
a61af66fc99e Initial load
duke
parents:
diff changeset
4602 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4603 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4604
a61af66fc99e Initial load
duke
parents:
diff changeset
4605 sprintf(proc_name, proc_stat_path, tid);
a61af66fc99e Initial load
duke
parents:
diff changeset
4606 fp = fopen(proc_name, "r");
a61af66fc99e Initial load
duke
parents:
diff changeset
4607 if ( fp == NULL ) return -1;
a61af66fc99e Initial load
duke
parents:
diff changeset
4608 statlen = fread(stat, 1, 2047, fp);
a61af66fc99e Initial load
duke
parents:
diff changeset
4609 stat[statlen] = '\0';
a61af66fc99e Initial load
duke
parents:
diff changeset
4610 fclose(fp);
a61af66fc99e Initial load
duke
parents:
diff changeset
4611
a61af66fc99e Initial load
duke
parents:
diff changeset
4612 // Skip pid and the command string. Note that we could be dealing with
a61af66fc99e Initial load
duke
parents:
diff changeset
4613 // weird command names, e.g. user could decide to rename java launcher
a61af66fc99e Initial load
duke
parents:
diff changeset
4614 // to "java 1.4.2 :)", then the stat file would look like
a61af66fc99e Initial load
duke
parents:
diff changeset
4615 // 1234 (java 1.4.2 :)) R ... ...
a61af66fc99e Initial load
duke
parents:
diff changeset
4616 // We don't really need to know the command string, just find the last
a61af66fc99e Initial load
duke
parents:
diff changeset
4617 // occurrence of ")" and then start parsing from there. See bug 4726580.
a61af66fc99e Initial load
duke
parents:
diff changeset
4618 s = strrchr(stat, ')');
a61af66fc99e Initial load
duke
parents:
diff changeset
4619 i = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
4620 if (s == NULL ) return -1;
a61af66fc99e Initial load
duke
parents:
diff changeset
4621
a61af66fc99e Initial load
duke
parents:
diff changeset
4622 // Skip blank chars
a61af66fc99e Initial load
duke
parents:
diff changeset
4623 do s++; while (isspace(*s));
a61af66fc99e Initial load
duke
parents:
diff changeset
4624
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4625 count = sscanf(s,"%c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu",
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4626 &cdummy, &idummy, &idummy, &idummy, &idummy, &idummy,
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4627 &ldummy, &ldummy, &ldummy, &ldummy, &ldummy,
a61af66fc99e Initial load
duke
parents:
diff changeset
4628 &user_time, &sys_time);
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
4629 if ( count != 13 ) return -1;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4630 if (user_sys_cpu_time) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4631 return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec);
a61af66fc99e Initial load
duke
parents:
diff changeset
4632 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4633 return (jlong)user_time * (1000000000 / clock_tics_per_sec);
a61af66fc99e Initial load
duke
parents:
diff changeset
4634 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4635 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4636
a61af66fc99e Initial load
duke
parents:
diff changeset
4637 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4638 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
a61af66fc99e Initial load
duke
parents:
diff changeset
4639 info_ptr->may_skip_backward = false; // elapsed time not wall time
a61af66fc99e Initial load
duke
parents:
diff changeset
4640 info_ptr->may_skip_forward = false; // elapsed time not wall time
a61af66fc99e Initial load
duke
parents:
diff changeset
4641 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned
a61af66fc99e Initial load
duke
parents:
diff changeset
4642 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4643
a61af66fc99e Initial load
duke
parents:
diff changeset
4644 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4645 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
a61af66fc99e Initial load
duke
parents:
diff changeset
4646 info_ptr->may_skip_backward = false; // elapsed time not wall time
a61af66fc99e Initial load
duke
parents:
diff changeset
4647 info_ptr->may_skip_forward = false; // elapsed time not wall time
a61af66fc99e Initial load
duke
parents:
diff changeset
4648 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned
a61af66fc99e Initial load
duke
parents:
diff changeset
4649 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4650
a61af66fc99e Initial load
duke
parents:
diff changeset
4651 bool os::is_thread_cpu_time_supported() {
a61af66fc99e Initial load
duke
parents:
diff changeset
4652 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
4653 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4654
a61af66fc99e Initial load
duke
parents:
diff changeset
4655 // System loadavg support. Returns -1 if load average cannot be obtained.
a61af66fc99e Initial load
duke
parents:
diff changeset
4656 // Linux doesn't yet have a (official) notion of processor sets,
a61af66fc99e Initial load
duke
parents:
diff changeset
4657 // so just return the system wide load average.
a61af66fc99e Initial load
duke
parents:
diff changeset
4658 int os::loadavg(double loadavg[], int nelem) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4659 return ::getloadavg(loadavg, nelem);
a61af66fc99e Initial load
duke
parents:
diff changeset
4660 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4661
a61af66fc99e Initial load
duke
parents:
diff changeset
4662 void os::pause() {
a61af66fc99e Initial load
duke
parents:
diff changeset
4663 char filename[MAX_PATH];
a61af66fc99e Initial load
duke
parents:
diff changeset
4664 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4665 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
a61af66fc99e Initial load
duke
parents:
diff changeset
4666 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4667 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
a61af66fc99e Initial load
duke
parents:
diff changeset
4668 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4669
a61af66fc99e Initial load
duke
parents:
diff changeset
4670 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
a61af66fc99e Initial load
duke
parents:
diff changeset
4671 if (fd != -1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4672 struct stat buf;
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
4673 ::close(fd);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4674 while (::stat(filename, &buf) == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4675 (void)::poll(NULL, 0, 100);
a61af66fc99e Initial load
duke
parents:
diff changeset
4676 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4677 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4678 jio_fprintf(stderr,
a61af66fc99e Initial load
duke
parents:
diff changeset
4679 "Could not open pause file '%s', continuing immediately.\n", filename);
a61af66fc99e Initial load
duke
parents:
diff changeset
4680 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4681 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4682
a61af66fc99e Initial load
duke
parents:
diff changeset
4683
a61af66fc99e Initial load
duke
parents:
diff changeset
4684 // Refer to the comments in os_solaris.cpp park-unpark.
a61af66fc99e Initial load
duke
parents:
diff changeset
4685 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4686 // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can
a61af66fc99e Initial load
duke
parents:
diff changeset
4687 // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable.
a61af66fc99e Initial load
duke
parents:
diff changeset
4688 // For specifics regarding the bug see GLIBC BUGID 261237 :
a61af66fc99e Initial load
duke
parents:
diff changeset
4689 // http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html.
a61af66fc99e Initial load
duke
parents:
diff changeset
4690 // Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future
a61af66fc99e Initial load
duke
parents:
diff changeset
4691 // will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar
a61af66fc99e Initial load
duke
parents:
diff changeset
4692 // is used. (The simple C test-case provided in the GLIBC bug report manifests the
a61af66fc99e Initial load
duke
parents:
diff changeset
4693 // hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos()
a61af66fc99e Initial load
duke
parents:
diff changeset
4694 // and monitorenter when we're using 1-0 locking. All those operations may result in
a61af66fc99e Initial load
duke
parents:
diff changeset
4695 // calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version
a61af66fc99e Initial load
duke
parents:
diff changeset
4696 // of libpthread avoids the problem, but isn't practical.
a61af66fc99e Initial load
duke
parents:
diff changeset
4697 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4698 // Possible remedies:
a61af66fc99e Initial load
duke
parents:
diff changeset
4699 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4700 // 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work.
a61af66fc99e Initial load
duke
parents:
diff changeset
4701 // This is palliative and probabilistic, however. If the thread is preempted
a61af66fc99e Initial load
duke
parents:
diff changeset
4702 // between the call to compute_abstime() and pthread_cond_timedwait(), more
a61af66fc99e Initial load
duke
parents:
diff changeset
4703 // than the minimum period may have passed, and the abstime may be stale (in the
a61af66fc99e Initial load
duke
parents:
diff changeset
4704 // past) resultin in a hang. Using this technique reduces the odds of a hang
a61af66fc99e Initial load
duke
parents:
diff changeset
4705 // but the JVM is still vulnerable, particularly on heavily loaded systems.
a61af66fc99e Initial load
duke
parents:
diff changeset
4706 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4707 // 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead
a61af66fc99e Initial load
duke
parents:
diff changeset
4708 // of the usual flag-condvar-mutex idiom. The write side of the pipe is set
a61af66fc99e Initial load
duke
parents:
diff changeset
4709 // NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo)
a61af66fc99e Initial load
duke
parents:
diff changeset
4710 // reduces to poll()+read(). This works well, but consumes 2 FDs per extant
a61af66fc99e Initial load
duke
parents:
diff changeset
4711 // thread.
a61af66fc99e Initial load
duke
parents:
diff changeset
4712 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4713 // 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread
a61af66fc99e Initial load
duke
parents:
diff changeset
4714 // that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing
a61af66fc99e Initial load
duke
parents:
diff changeset
4715 // a timeout request to the chron thread and then blocking via pthread_cond_wait().
a61af66fc99e Initial load
duke
parents:
diff changeset
4716 // This also works well. In fact it avoids kernel-level scalability impediments
a61af66fc99e Initial load
duke
parents:
diff changeset
4717 // on certain platforms that don't handle lots of active pthread_cond_timedwait()
a61af66fc99e Initial load
duke
parents:
diff changeset
4718 // timers in a graceful fashion.
a61af66fc99e Initial load
duke
parents:
diff changeset
4719 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4720 // 4. When the abstime value is in the past it appears that control returns
a61af66fc99e Initial load
duke
parents:
diff changeset
4721 // correctly from pthread_cond_timedwait(), but the condvar is left corrupt.
a61af66fc99e Initial load
duke
parents:
diff changeset
4722 // Subsequent timedwait/wait calls may hang indefinitely. Given that, we
a61af66fc99e Initial load
duke
parents:
diff changeset
4723 // can avoid the problem by reinitializing the condvar -- by cond_destroy()
a61af66fc99e Initial load
duke
parents:
diff changeset
4724 // followed by cond_init() -- after all calls to pthread_cond_timedwait().
a61af66fc99e Initial load
duke
parents:
diff changeset
4725 // It may be possible to avoid reinitialization by checking the return
a61af66fc99e Initial load
duke
parents:
diff changeset
4726 // value from pthread_cond_timedwait(). In addition to reinitializing the
a61af66fc99e Initial load
duke
parents:
diff changeset
4727 // condvar we must establish the invariant that cond_signal() is only called
a61af66fc99e Initial load
duke
parents:
diff changeset
4728 // within critical sections protected by the adjunct mutex. This prevents
a61af66fc99e Initial load
duke
parents:
diff changeset
4729 // cond_signal() from "seeing" a condvar that's in the midst of being
a61af66fc99e Initial load
duke
parents:
diff changeset
4730 // reinitialized or that is corrupt. Sadly, this invariant obviates the
a61af66fc99e Initial load
duke
parents:
diff changeset
4731 // desirable signal-after-unlock optimization that avoids futile context switching.
a61af66fc99e Initial load
duke
parents:
diff changeset
4732 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4733 // I'm also concerned that some versions of NTPL might allocate an auxilliary
a61af66fc99e Initial load
duke
parents:
diff changeset
4734 // structure when a condvar is used or initialized. cond_destroy() would
a61af66fc99e Initial load
duke
parents:
diff changeset
4735 // release the helper structure. Our reinitialize-after-timedwait fix
a61af66fc99e Initial load
duke
parents:
diff changeset
4736 // put excessive stress on malloc/free and locks protecting the c-heap.
a61af66fc99e Initial load
duke
parents:
diff changeset
4737 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4738 // We currently use (4). See the WorkAroundNTPLTimedWaitHang flag.
a61af66fc99e Initial load
duke
parents:
diff changeset
4739 // It may be possible to refine (4) by checking the kernel and NTPL verisons
a61af66fc99e Initial load
duke
parents:
diff changeset
4740 // and only enabling the work-around for vulnerable environments.
a61af66fc99e Initial load
duke
parents:
diff changeset
4741
a61af66fc99e Initial load
duke
parents:
diff changeset
4742 // utility to compute the abstime argument to timedwait:
a61af66fc99e Initial load
duke
parents:
diff changeset
4743 // millis is the relative timeout time
a61af66fc99e Initial load
duke
parents:
diff changeset
4744 // abstime will be the absolute timeout time
a61af66fc99e Initial load
duke
parents:
diff changeset
4745 // TODO: replace compute_abstime() with unpackTime()
a61af66fc99e Initial load
duke
parents:
diff changeset
4746
a61af66fc99e Initial load
duke
parents:
diff changeset
4747 static struct timespec* compute_abstime(timespec* abstime, jlong millis) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4748 if (millis < 0) millis = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
4749 struct timeval now;
a61af66fc99e Initial load
duke
parents:
diff changeset
4750 int status = gettimeofday(&now, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
4751 assert(status == 0, "gettimeofday");
a61af66fc99e Initial load
duke
parents:
diff changeset
4752 jlong seconds = millis / 1000;
a61af66fc99e Initial load
duke
parents:
diff changeset
4753 millis %= 1000;
a61af66fc99e Initial load
duke
parents:
diff changeset
4754 if (seconds > 50000000) { // see man cond_timedwait(3T)
a61af66fc99e Initial load
duke
parents:
diff changeset
4755 seconds = 50000000;
a61af66fc99e Initial load
duke
parents:
diff changeset
4756 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4757 abstime->tv_sec = now.tv_sec + seconds;
a61af66fc99e Initial load
duke
parents:
diff changeset
4758 long usec = now.tv_usec + millis * 1000;
a61af66fc99e Initial load
duke
parents:
diff changeset
4759 if (usec >= 1000000) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4760 abstime->tv_sec += 1;
a61af66fc99e Initial load
duke
parents:
diff changeset
4761 usec -= 1000000;
a61af66fc99e Initial load
duke
parents:
diff changeset
4762 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4763 abstime->tv_nsec = usec * 1000;
a61af66fc99e Initial load
duke
parents:
diff changeset
4764 return abstime;
a61af66fc99e Initial load
duke
parents:
diff changeset
4765 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4766
a61af66fc99e Initial load
duke
parents:
diff changeset
4767
a61af66fc99e Initial load
duke
parents:
diff changeset
4768 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
a61af66fc99e Initial load
duke
parents:
diff changeset
4769 // Conceptually TryPark() should be equivalent to park(0).
a61af66fc99e Initial load
duke
parents:
diff changeset
4770
a61af66fc99e Initial load
duke
parents:
diff changeset
4771 int os::PlatformEvent::TryPark() {
a61af66fc99e Initial load
duke
parents:
diff changeset
4772 for (;;) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4773 const int v = _Event ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4774 guarantee ((v == 0) || (v == 1), "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4775 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4776 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4777 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4778
a61af66fc99e Initial load
duke
parents:
diff changeset
4779 void os::PlatformEvent::park() { // AKA "down()"
a61af66fc99e Initial load
duke
parents:
diff changeset
4780 // Invariant: Only the thread associated with the Event/PlatformEvent
a61af66fc99e Initial load
duke
parents:
diff changeset
4781 // may call park().
a61af66fc99e Initial load
duke
parents:
diff changeset
4782 // TODO: assert that _Assoc != NULL or _Assoc == Self
a61af66fc99e Initial load
duke
parents:
diff changeset
4783 int v ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4784 for (;;) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4785 v = _Event ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4786 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4787 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4788 guarantee (v >= 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4789 if (v == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4790 // Do this the hard way by blocking ...
a61af66fc99e Initial load
duke
parents:
diff changeset
4791 int status = pthread_mutex_lock(_mutex);
a61af66fc99e Initial load
duke
parents:
diff changeset
4792 assert_status(status == 0, status, "mutex_lock");
a61af66fc99e Initial load
duke
parents:
diff changeset
4793 guarantee (_nParked == 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4794 ++ _nParked ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4795 while (_Event < 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4796 status = pthread_cond_wait(_cond, _mutex);
a61af66fc99e Initial load
duke
parents:
diff changeset
4797 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
a61af66fc99e Initial load
duke
parents:
diff changeset
4798 // Treat this the same as if the wait was interrupted
a61af66fc99e Initial load
duke
parents:
diff changeset
4799 if (status == ETIME) { status = EINTR; }
a61af66fc99e Initial load
duke
parents:
diff changeset
4800 assert_status(status == 0 || status == EINTR, status, "cond_wait");
a61af66fc99e Initial load
duke
parents:
diff changeset
4801 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4802 -- _nParked ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4803
a61af66fc99e Initial load
duke
parents:
diff changeset
4804 // In theory we could move the ST of 0 into _Event past the unlock(),
a61af66fc99e Initial load
duke
parents:
diff changeset
4805 // but then we'd need a MEMBAR after the ST.
a61af66fc99e Initial load
duke
parents:
diff changeset
4806 _Event = 0 ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4807 status = pthread_mutex_unlock(_mutex);
a61af66fc99e Initial load
duke
parents:
diff changeset
4808 assert_status(status == 0, status, "mutex_unlock");
a61af66fc99e Initial load
duke
parents:
diff changeset
4809 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4810 guarantee (_Event >= 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4811 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4812
a61af66fc99e Initial load
duke
parents:
diff changeset
4813 int os::PlatformEvent::park(jlong millis) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4814 guarantee (_nParked == 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4815
a61af66fc99e Initial load
duke
parents:
diff changeset
4816 int v ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4817 for (;;) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4818 v = _Event ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4819 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4820 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4821 guarantee (v >= 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4822 if (v != 0) return OS_OK ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4823
a61af66fc99e Initial load
duke
parents:
diff changeset
4824 // We do this the hard way, by blocking the thread.
a61af66fc99e Initial load
duke
parents:
diff changeset
4825 // Consider enforcing a minimum timeout value.
a61af66fc99e Initial load
duke
parents:
diff changeset
4826 struct timespec abst;
a61af66fc99e Initial load
duke
parents:
diff changeset
4827 compute_abstime(&abst, millis);
a61af66fc99e Initial load
duke
parents:
diff changeset
4828
a61af66fc99e Initial load
duke
parents:
diff changeset
4829 int ret = OS_TIMEOUT;
a61af66fc99e Initial load
duke
parents:
diff changeset
4830 int status = pthread_mutex_lock(_mutex);
a61af66fc99e Initial load
duke
parents:
diff changeset
4831 assert_status(status == 0, status, "mutex_lock");
a61af66fc99e Initial load
duke
parents:
diff changeset
4832 guarantee (_nParked == 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4833 ++_nParked ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4834
a61af66fc99e Initial load
duke
parents:
diff changeset
4835 // Object.wait(timo) will return because of
a61af66fc99e Initial load
duke
parents:
diff changeset
4836 // (a) notification
a61af66fc99e Initial load
duke
parents:
diff changeset
4837 // (b) timeout
a61af66fc99e Initial load
duke
parents:
diff changeset
4838 // (c) thread.interrupt
a61af66fc99e Initial load
duke
parents:
diff changeset
4839 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4840 // Thread.interrupt and object.notify{All} both call Event::set.
a61af66fc99e Initial load
duke
parents:
diff changeset
4841 // That is, we treat thread.interrupt as a special case of notification.
a61af66fc99e Initial load
duke
parents:
diff changeset
4842 // The underlying Solaris implementation, cond_timedwait, admits
a61af66fc99e Initial load
duke
parents:
diff changeset
4843 // spurious/premature wakeups, but the JLS/JVM spec prevents the
a61af66fc99e Initial load
duke
parents:
diff changeset
4844 // JVM from making those visible to Java code. As such, we must
a61af66fc99e Initial load
duke
parents:
diff changeset
4845 // filter out spurious wakeups. We assume all ETIME returns are valid.
a61af66fc99e Initial load
duke
parents:
diff changeset
4846 //
a61af66fc99e Initial load
duke
parents:
diff changeset
4847 // TODO: properly differentiate simultaneous notify+interrupt.
a61af66fc99e Initial load
duke
parents:
diff changeset
4848 // In that case, we should propagate the notify to another waiter.
a61af66fc99e Initial load
duke
parents:
diff changeset
4849
a61af66fc99e Initial load
duke
parents:
diff changeset
4850 while (_Event < 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4851 status = os::Linux::safe_cond_timedwait(_cond, _mutex, &abst);
a61af66fc99e Initial load
duke
parents:
diff changeset
4852 if (status != 0 && WorkAroundNPTLTimedWaitHang) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4853 pthread_cond_destroy (_cond);
a61af66fc99e Initial load
duke
parents:
diff changeset
4854 pthread_cond_init (_cond, NULL) ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4855 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4856 assert_status(status == 0 || status == EINTR ||
a61af66fc99e Initial load
duke
parents:
diff changeset
4857 status == ETIME || status == ETIMEDOUT,
a61af66fc99e Initial load
duke
parents:
diff changeset
4858 status, "cond_timedwait");
a61af66fc99e Initial load
duke
parents:
diff changeset
4859 if (!FilterSpuriousWakeups) break ; // previous semantics
a61af66fc99e Initial load
duke
parents:
diff changeset
4860 if (status == ETIME || status == ETIMEDOUT) break ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4861 // We consume and ignore EINTR and spurious wakeups.
a61af66fc99e Initial load
duke
parents:
diff changeset
4862 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4863 --_nParked ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4864 if (_Event >= 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4865 ret = OS_OK;
a61af66fc99e Initial load
duke
parents:
diff changeset
4866 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4867 _Event = 0 ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4868 status = pthread_mutex_unlock(_mutex);
a61af66fc99e Initial load
duke
parents:
diff changeset
4869 assert_status(status == 0, status, "mutex_unlock");
a61af66fc99e Initial load
duke
parents:
diff changeset
4870 assert (_nParked == 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4871 return ret;
a61af66fc99e Initial load
duke
parents:
diff changeset
4872 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4873
a61af66fc99e Initial load
duke
parents:
diff changeset
4874 void os::PlatformEvent::unpark() {
a61af66fc99e Initial load
duke
parents:
diff changeset
4875 int v, AnyWaiters ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4876 for (;;) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4877 v = _Event ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4878 if (v > 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4879 // The LD of _Event could have reordered or be satisfied
a61af66fc99e Initial load
duke
parents:
diff changeset
4880 // by a read-aside from this processor's write buffer.
a61af66fc99e Initial load
duke
parents:
diff changeset
4881 // To avoid problems execute a barrier and then
a61af66fc99e Initial load
duke
parents:
diff changeset
4882 // ratify the value.
a61af66fc99e Initial load
duke
parents:
diff changeset
4883 OrderAccess::fence() ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4884 if (_Event == v) return ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4885 continue ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4886 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4887 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4888 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4889 if (v < 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4890 // Wait for the thread associated with the event to vacate
a61af66fc99e Initial load
duke
parents:
diff changeset
4891 int status = pthread_mutex_lock(_mutex);
a61af66fc99e Initial load
duke
parents:
diff changeset
4892 assert_status(status == 0, status, "mutex_lock");
a61af66fc99e Initial load
duke
parents:
diff changeset
4893 AnyWaiters = _nParked ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4894 assert (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4895 if (AnyWaiters != 0 && WorkAroundNPTLTimedWaitHang) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4896 AnyWaiters = 0 ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4897 pthread_cond_signal (_cond);
a61af66fc99e Initial load
duke
parents:
diff changeset
4898 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4899 status = pthread_mutex_unlock(_mutex);
a61af66fc99e Initial load
duke
parents:
diff changeset
4900 assert_status(status == 0, status, "mutex_unlock");
a61af66fc99e Initial load
duke
parents:
diff changeset
4901 if (AnyWaiters != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4902 status = pthread_cond_signal(_cond);
a61af66fc99e Initial load
duke
parents:
diff changeset
4903 assert_status(status == 0, status, "cond_signal");
a61af66fc99e Initial load
duke
parents:
diff changeset
4904 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4905 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4906
a61af66fc99e Initial load
duke
parents:
diff changeset
4907 // Note that we signal() _after dropping the lock for "immortal" Events.
a61af66fc99e Initial load
duke
parents:
diff changeset
4908 // This is safe and avoids a common class of futile wakeups. In rare
a61af66fc99e Initial load
duke
parents:
diff changeset
4909 // circumstances this can cause a thread to return prematurely from
a61af66fc99e Initial load
duke
parents:
diff changeset
4910 // cond_{timed}wait() but the spurious wakeup is benign and the victim will
a61af66fc99e Initial load
duke
parents:
diff changeset
4911 // simply re-test the condition and re-park itself.
a61af66fc99e Initial load
duke
parents:
diff changeset
4912 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4913
a61af66fc99e Initial load
duke
parents:
diff changeset
4914
a61af66fc99e Initial load
duke
parents:
diff changeset
4915 // JSR166
a61af66fc99e Initial load
duke
parents:
diff changeset
4916 // -------------------------------------------------------
a61af66fc99e Initial load
duke
parents:
diff changeset
4917
a61af66fc99e Initial load
duke
parents:
diff changeset
4918 /*
a61af66fc99e Initial load
duke
parents:
diff changeset
4919 * The solaris and linux implementations of park/unpark are fairly
a61af66fc99e Initial load
duke
parents:
diff changeset
4920 * conservative for now, but can be improved. They currently use a
a61af66fc99e Initial load
duke
parents:
diff changeset
4921 * mutex/condvar pair, plus a a count.
a61af66fc99e Initial load
duke
parents:
diff changeset
4922 * Park decrements count if > 0, else does a condvar wait. Unpark
a61af66fc99e Initial load
duke
parents:
diff changeset
4923 * sets count to 1 and signals condvar. Only one thread ever waits
a61af66fc99e Initial load
duke
parents:
diff changeset
4924 * on the condvar. Contention seen when trying to park implies that someone
a61af66fc99e Initial load
duke
parents:
diff changeset
4925 * is unparking you, so don't wait. And spurious returns are fine, so there
a61af66fc99e Initial load
duke
parents:
diff changeset
4926 * is no need to track notifications.
a61af66fc99e Initial load
duke
parents:
diff changeset
4927 */
a61af66fc99e Initial load
duke
parents:
diff changeset
4928
a61af66fc99e Initial load
duke
parents:
diff changeset
4929
a61af66fc99e Initial load
duke
parents:
diff changeset
4930 #define NANOSECS_PER_SEC 1000000000
a61af66fc99e Initial load
duke
parents:
diff changeset
4931 #define NANOSECS_PER_MILLISEC 1000000
a61af66fc99e Initial load
duke
parents:
diff changeset
4932 #define MAX_SECS 100000000
a61af66fc99e Initial load
duke
parents:
diff changeset
4933 /*
a61af66fc99e Initial load
duke
parents:
diff changeset
4934 * This code is common to linux and solaris and will be moved to a
a61af66fc99e Initial load
duke
parents:
diff changeset
4935 * common place in dolphin.
a61af66fc99e Initial load
duke
parents:
diff changeset
4936 *
a61af66fc99e Initial load
duke
parents:
diff changeset
4937 * The passed in time value is either a relative time in nanoseconds
a61af66fc99e Initial load
duke
parents:
diff changeset
4938 * or an absolute time in milliseconds. Either way it has to be unpacked
a61af66fc99e Initial load
duke
parents:
diff changeset
4939 * into suitable seconds and nanoseconds components and stored in the
a61af66fc99e Initial load
duke
parents:
diff changeset
4940 * given timespec structure.
a61af66fc99e Initial load
duke
parents:
diff changeset
4941 * Given time is a 64-bit value and the time_t used in the timespec is only
a61af66fc99e Initial load
duke
parents:
diff changeset
4942 * a signed-32-bit value (except on 64-bit Linux) we have to watch for
a61af66fc99e Initial load
duke
parents:
diff changeset
4943 * overflow if times way in the future are given. Further on Solaris versions
a61af66fc99e Initial load
duke
parents:
diff changeset
4944 * prior to 10 there is a restriction (see cond_timedwait) that the specified
a61af66fc99e Initial load
duke
parents:
diff changeset
4945 * number of seconds, in abstime, is less than current_time + 100,000,000.
a61af66fc99e Initial load
duke
parents:
diff changeset
4946 * As it will be 28 years before "now + 100000000" will overflow we can
a61af66fc99e Initial load
duke
parents:
diff changeset
4947 * ignore overflow and just impose a hard-limit on seconds using the value
a61af66fc99e Initial load
duke
parents:
diff changeset
4948 * of "now + 100,000,000". This places a limit on the timeout of about 3.17
a61af66fc99e Initial load
duke
parents:
diff changeset
4949 * years from "now".
a61af66fc99e Initial load
duke
parents:
diff changeset
4950 */
a61af66fc99e Initial load
duke
parents:
diff changeset
4951
a61af66fc99e Initial load
duke
parents:
diff changeset
4952 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4953 assert (time > 0, "convertTime");
a61af66fc99e Initial load
duke
parents:
diff changeset
4954
a61af66fc99e Initial load
duke
parents:
diff changeset
4955 struct timeval now;
a61af66fc99e Initial load
duke
parents:
diff changeset
4956 int status = gettimeofday(&now, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
4957 assert(status == 0, "gettimeofday");
a61af66fc99e Initial load
duke
parents:
diff changeset
4958
a61af66fc99e Initial load
duke
parents:
diff changeset
4959 time_t max_secs = now.tv_sec + MAX_SECS;
a61af66fc99e Initial load
duke
parents:
diff changeset
4960
a61af66fc99e Initial load
duke
parents:
diff changeset
4961 if (isAbsolute) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4962 jlong secs = time / 1000;
a61af66fc99e Initial load
duke
parents:
diff changeset
4963 if (secs > max_secs) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4964 absTime->tv_sec = max_secs;
a61af66fc99e Initial load
duke
parents:
diff changeset
4965 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4966 else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4967 absTime->tv_sec = secs;
a61af66fc99e Initial load
duke
parents:
diff changeset
4968 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4969 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
a61af66fc99e Initial load
duke
parents:
diff changeset
4970 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4971 else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4972 jlong secs = time / NANOSECS_PER_SEC;
a61af66fc99e Initial load
duke
parents:
diff changeset
4973 if (secs >= MAX_SECS) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4974 absTime->tv_sec = max_secs;
a61af66fc99e Initial load
duke
parents:
diff changeset
4975 absTime->tv_nsec = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
4976 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4977 else {
a61af66fc99e Initial load
duke
parents:
diff changeset
4978 absTime->tv_sec = now.tv_sec + secs;
a61af66fc99e Initial load
duke
parents:
diff changeset
4979 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
a61af66fc99e Initial load
duke
parents:
diff changeset
4980 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4981 absTime->tv_nsec -= NANOSECS_PER_SEC;
a61af66fc99e Initial load
duke
parents:
diff changeset
4982 ++absTime->tv_sec; // note: this must be <= max_secs
a61af66fc99e Initial load
duke
parents:
diff changeset
4983 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4984 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4985 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4986 assert(absTime->tv_sec >= 0, "tv_sec < 0");
a61af66fc99e Initial load
duke
parents:
diff changeset
4987 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
a61af66fc99e Initial load
duke
parents:
diff changeset
4988 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
a61af66fc99e Initial load
duke
parents:
diff changeset
4989 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
a61af66fc99e Initial load
duke
parents:
diff changeset
4990 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4991
a61af66fc99e Initial load
duke
parents:
diff changeset
4992 void Parker::park(bool isAbsolute, jlong time) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4993 // Optional fast-path check:
a61af66fc99e Initial load
duke
parents:
diff changeset
4994 // Return immediately if a permit is available.
a61af66fc99e Initial load
duke
parents:
diff changeset
4995 if (_counter > 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4996 _counter = 0 ;
1117
95e9083cf4a7 6822370: ReentrantReadWriteLock: threads hung when there are no threads holding onto the lock (Netra x4450)
dholmes
parents: 1010
diff changeset
4997 OrderAccess::fence();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4998 return ;
a61af66fc99e Initial load
duke
parents:
diff changeset
4999 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5000
a61af66fc99e Initial load
duke
parents:
diff changeset
5001 Thread* thread = Thread::current();
a61af66fc99e Initial load
duke
parents:
diff changeset
5002 assert(thread->is_Java_thread(), "Must be JavaThread");
a61af66fc99e Initial load
duke
parents:
diff changeset
5003 JavaThread *jt = (JavaThread *)thread;
a61af66fc99e Initial load
duke
parents:
diff changeset
5004
a61af66fc99e Initial load
duke
parents:
diff changeset
5005 // Optional optimization -- avoid state transitions if there's an interrupt pending.
a61af66fc99e Initial load
duke
parents:
diff changeset
5006 // Check interrupt before trying to wait
a61af66fc99e Initial load
duke
parents:
diff changeset
5007 if (Thread::is_interrupted(thread, false)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5008 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
5009 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5010
a61af66fc99e Initial load
duke
parents:
diff changeset
5011 // Next, demultiplex/decode time arguments
a61af66fc99e Initial load
duke
parents:
diff changeset
5012 timespec absTime;
1865
1c352af0135d 6763959: java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
acorn
parents: 1750
diff changeset
5013 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all
0
a61af66fc99e Initial load
duke
parents:
diff changeset
5014 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
5015 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5016 if (time > 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5017 unpackTime(&absTime, isAbsolute, time);
a61af66fc99e Initial load
duke
parents:
diff changeset
5018 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5019
a61af66fc99e Initial load
duke
parents:
diff changeset
5020
a61af66fc99e Initial load
duke
parents:
diff changeset
5021 // Enter safepoint region
a61af66fc99e Initial load
duke
parents:
diff changeset
5022 // Beware of deadlocks such as 6317397.
a61af66fc99e Initial load
duke
parents:
diff changeset
5023 // The per-thread Parker:: mutex is a classic leaf-lock.
a61af66fc99e Initial load
duke
parents:
diff changeset
5024 // In particular a thread must never block on the Threads_lock while
a61af66fc99e Initial load
duke
parents:
diff changeset
5025 // holding the Parker:: mutex. If safepoints are pending both the
a61af66fc99e Initial load
duke
parents:
diff changeset
5026 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
a61af66fc99e Initial load
duke
parents:
diff changeset
5027 ThreadBlockInVM tbivm(jt);
a61af66fc99e Initial load
duke
parents:
diff changeset
5028
a61af66fc99e Initial load
duke
parents:
diff changeset
5029 // Don't wait if cannot get lock since interference arises from
a61af66fc99e Initial load
duke
parents:
diff changeset
5030 // unblocking. Also. check interrupt before trying wait
a61af66fc99e Initial load
duke
parents:
diff changeset
5031 if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5032 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
5033 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5034
a61af66fc99e Initial load
duke
parents:
diff changeset
5035 int status ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5036 if (_counter > 0) { // no wait needed
a61af66fc99e Initial load
duke
parents:
diff changeset
5037 _counter = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
5038 status = pthread_mutex_unlock(_mutex);
a61af66fc99e Initial load
duke
parents:
diff changeset
5039 assert (status == 0, "invariant") ;
1117
95e9083cf4a7 6822370: ReentrantReadWriteLock: threads hung when there are no threads holding onto the lock (Netra x4450)
dholmes
parents: 1010
diff changeset
5040 OrderAccess::fence();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
5041 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
5042 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5043
a61af66fc99e Initial load
duke
parents:
diff changeset
5044 #ifdef ASSERT
a61af66fc99e Initial load
duke
parents:
diff changeset
5045 // Don't catch signals while blocked; let the running threads have the signals.
a61af66fc99e Initial load
duke
parents:
diff changeset
5046 // (This allows a debugger to break into the running thread.)
a61af66fc99e Initial load
duke
parents:
diff changeset
5047 sigset_t oldsigs;
a61af66fc99e Initial load
duke
parents:
diff changeset
5048 sigset_t* allowdebug_blocked = os::Linux::allowdebug_blocked_signals();
a61af66fc99e Initial load
duke
parents:
diff changeset
5049 pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
a61af66fc99e Initial load
duke
parents:
diff changeset
5050 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
5051
a61af66fc99e Initial load
duke
parents:
diff changeset
5052 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
a61af66fc99e Initial load
duke
parents:
diff changeset
5053 jt->set_suspend_equivalent();
a61af66fc99e Initial load
duke
parents:
diff changeset
5054 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
a61af66fc99e Initial load
duke
parents:
diff changeset
5055
a61af66fc99e Initial load
duke
parents:
diff changeset
5056 if (time == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5057 status = pthread_cond_wait (_cond, _mutex) ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5058 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
5059 status = os::Linux::safe_cond_timedwait (_cond, _mutex, &absTime) ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5060 if (status != 0 && WorkAroundNPTLTimedWaitHang) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5061 pthread_cond_destroy (_cond) ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5062 pthread_cond_init (_cond, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
5063 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5064 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5065 assert_status(status == 0 || status == EINTR ||
a61af66fc99e Initial load
duke
parents:
diff changeset
5066 status == ETIME || status == ETIMEDOUT,
a61af66fc99e Initial load
duke
parents:
diff changeset
5067 status, "cond_timedwait");
a61af66fc99e Initial load
duke
parents:
diff changeset
5068
a61af66fc99e Initial load
duke
parents:
diff changeset
5069 #ifdef ASSERT
a61af66fc99e Initial load
duke
parents:
diff changeset
5070 pthread_sigmask(SIG_SETMASK, &oldsigs, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
5071 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
5072
a61af66fc99e Initial load
duke
parents:
diff changeset
5073 _counter = 0 ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5074 status = pthread_mutex_unlock(_mutex) ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5075 assert_status(status == 0, status, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5076 // If externally suspended while waiting, re-suspend
a61af66fc99e Initial load
duke
parents:
diff changeset
5077 if (jt->handle_special_suspend_equivalent_condition()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5078 jt->java_suspend_self();
a61af66fc99e Initial load
duke
parents:
diff changeset
5079 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5080
1117
95e9083cf4a7 6822370: ReentrantReadWriteLock: threads hung when there are no threads holding onto the lock (Netra x4450)
dholmes
parents: 1010
diff changeset
5081 OrderAccess::fence();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
5082 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5083
a61af66fc99e Initial load
duke
parents:
diff changeset
5084 void Parker::unpark() {
a61af66fc99e Initial load
duke
parents:
diff changeset
5085 int s, status ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5086 status = pthread_mutex_lock(_mutex);
a61af66fc99e Initial load
duke
parents:
diff changeset
5087 assert (status == 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5088 s = _counter;
a61af66fc99e Initial load
duke
parents:
diff changeset
5089 _counter = 1;
a61af66fc99e Initial load
duke
parents:
diff changeset
5090 if (s < 1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5091 if (WorkAroundNPTLTimedWaitHang) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5092 status = pthread_cond_signal (_cond) ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5093 assert (status == 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5094 status = pthread_mutex_unlock(_mutex);
a61af66fc99e Initial load
duke
parents:
diff changeset
5095 assert (status == 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5096 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
5097 status = pthread_mutex_unlock(_mutex);
a61af66fc99e Initial load
duke
parents:
diff changeset
5098 assert (status == 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5099 status = pthread_cond_signal (_cond) ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5100 assert (status == 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5101 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5102 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
5103 pthread_mutex_unlock(_mutex);
a61af66fc99e Initial load
duke
parents:
diff changeset
5104 assert (status == 0, "invariant") ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5105 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5106 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5107
a61af66fc99e Initial load
duke
parents:
diff changeset
5108
a61af66fc99e Initial load
duke
parents:
diff changeset
5109 extern char** environ;
a61af66fc99e Initial load
duke
parents:
diff changeset
5110
a61af66fc99e Initial load
duke
parents:
diff changeset
5111 #ifndef __NR_fork
a61af66fc99e Initial load
duke
parents:
diff changeset
5112 #define __NR_fork IA32_ONLY(2) IA64_ONLY(not defined) AMD64_ONLY(57)
a61af66fc99e Initial load
duke
parents:
diff changeset
5113 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
5114
a61af66fc99e Initial load
duke
parents:
diff changeset
5115 #ifndef __NR_execve
a61af66fc99e Initial load
duke
parents:
diff changeset
5116 #define __NR_execve IA32_ONLY(11) IA64_ONLY(1033) AMD64_ONLY(59)
a61af66fc99e Initial load
duke
parents:
diff changeset
5117 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
5118
a61af66fc99e Initial load
duke
parents:
diff changeset
5119 // Run the specified command in a separate process. Return its exit value,
a61af66fc99e Initial load
duke
parents:
diff changeset
5120 // or -1 on failure (e.g. can't fork a new process).
a61af66fc99e Initial load
duke
parents:
diff changeset
5121 // Unlike system(), this function can be called from signal handler. It
a61af66fc99e Initial load
duke
parents:
diff changeset
5122 // doesn't block SIGINT et al.
a61af66fc99e Initial load
duke
parents:
diff changeset
5123 int os::fork_and_exec(char* cmd) {
199
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
5124 const char * argv[4] = {"sh", "-c", cmd, NULL};
0
a61af66fc99e Initial load
duke
parents:
diff changeset
5125
a61af66fc99e Initial load
duke
parents:
diff changeset
5126 // fork() in LinuxThreads/NPTL is not async-safe. It needs to run
a61af66fc99e Initial load
duke
parents:
diff changeset
5127 // pthread_atfork handlers and reset pthread library. All we need is a
a61af66fc99e Initial load
duke
parents:
diff changeset
5128 // separate process to execve. Make a direct syscall to fork process.
a61af66fc99e Initial load
duke
parents:
diff changeset
5129 // On IA64 there's no fork syscall, we have to use fork() and hope for
a61af66fc99e Initial load
duke
parents:
diff changeset
5130 // the best...
a61af66fc99e Initial load
duke
parents:
diff changeset
5131 pid_t pid = NOT_IA64(syscall(__NR_fork);)
a61af66fc99e Initial load
duke
parents:
diff changeset
5132 IA64_ONLY(fork();)
a61af66fc99e Initial load
duke
parents:
diff changeset
5133
a61af66fc99e Initial load
duke
parents:
diff changeset
5134 if (pid < 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5135 // fork failed
a61af66fc99e Initial load
duke
parents:
diff changeset
5136 return -1;
a61af66fc99e Initial load
duke
parents:
diff changeset
5137
a61af66fc99e Initial load
duke
parents:
diff changeset
5138 } else if (pid == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5139 // child process
a61af66fc99e Initial load
duke
parents:
diff changeset
5140
a61af66fc99e Initial load
duke
parents:
diff changeset
5141 // execve() in LinuxThreads will call pthread_kill_other_threads_np()
a61af66fc99e Initial load
duke
parents:
diff changeset
5142 // first to kill every thread on the thread list. Because this list is
a61af66fc99e Initial load
duke
parents:
diff changeset
5143 // not reset by fork() (see notes above), execve() will instead kill
a61af66fc99e Initial load
duke
parents:
diff changeset
5144 // every thread in the parent process. We know this is the only thread
a61af66fc99e Initial load
duke
parents:
diff changeset
5145 // in the new process, so make a system call directly.
a61af66fc99e Initial load
duke
parents:
diff changeset
5146 // IA64 should use normal execve() from glibc to match the glibc fork()
a61af66fc99e Initial load
duke
parents:
diff changeset
5147 // above.
a61af66fc99e Initial load
duke
parents:
diff changeset
5148 NOT_IA64(syscall(__NR_execve, "/bin/sh", argv, environ);)
199
f139919897d2 6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents: 141
diff changeset
5149 IA64_ONLY(execve("/bin/sh", (char* const*)argv, environ);)
0
a61af66fc99e Initial load
duke
parents:
diff changeset
5150
a61af66fc99e Initial load
duke
parents:
diff changeset
5151 // execve failed
a61af66fc99e Initial load
duke
parents:
diff changeset
5152 _exit(-1);
a61af66fc99e Initial load
duke
parents:
diff changeset
5153
a61af66fc99e Initial load
duke
parents:
diff changeset
5154 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
5155 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
a61af66fc99e Initial load
duke
parents:
diff changeset
5156 // care about the actual exit code, for now.
a61af66fc99e Initial load
duke
parents:
diff changeset
5157
a61af66fc99e Initial load
duke
parents:
diff changeset
5158 int status;
a61af66fc99e Initial load
duke
parents:
diff changeset
5159
a61af66fc99e Initial load
duke
parents:
diff changeset
5160 // Wait for the child process to exit. This returns immediately if
a61af66fc99e Initial load
duke
parents:
diff changeset
5161 // the child has already exited. */
a61af66fc99e Initial load
duke
parents:
diff changeset
5162 while (waitpid(pid, &status, 0) < 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5163 switch (errno) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5164 case ECHILD: return 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
5165 case EINTR: break;
a61af66fc99e Initial load
duke
parents:
diff changeset
5166 default: return -1;
a61af66fc99e Initial load
duke
parents:
diff changeset
5167 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5168 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5169
a61af66fc99e Initial load
duke
parents:
diff changeset
5170 if (WIFEXITED(status)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5171 // The child exited normally; get its exit code.
a61af66fc99e Initial load
duke
parents:
diff changeset
5172 return WEXITSTATUS(status);
a61af66fc99e Initial load
duke
parents:
diff changeset
5173 } else if (WIFSIGNALED(status)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
5174 // The child exited because of a signal
a61af66fc99e Initial load
duke
parents:
diff changeset
5175 // The best value to return is 0x80 + signal number,
a61af66fc99e Initial load
duke
parents:
diff changeset
5176 // because that is what all Unix shells do, and because
a61af66fc99e Initial load
duke
parents:
diff changeset
5177 // it allows callers to distinguish between process exit and
a61af66fc99e Initial load
duke
parents:
diff changeset
5178 // process death by signal.
a61af66fc99e Initial load
duke
parents:
diff changeset
5179 return 0x80 + WTERMSIG(status);
a61af66fc99e Initial load
duke
parents:
diff changeset
5180 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
5181 // Unknown exit code; pass it through
a61af66fc99e Initial load
duke
parents:
diff changeset
5182 return status;
a61af66fc99e Initial load
duke
parents:
diff changeset
5183 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5184 }
a61af66fc99e Initial load
duke
parents:
diff changeset
5185 }
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5186
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5187 // is_headless_jre()
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5188 //
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5189 // Test for the existence of libmawt in motif21 or xawt directories
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5190 // in order to report if we are running in a headless jre
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5191 //
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5192 bool os::is_headless_jre() {
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5193 struct stat statbuf;
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5194 char buf[MAXPATHLEN];
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5195 char libmawtpath[MAXPATHLEN];
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5196 const char *xawtstr = "/xawt/libmawt.so";
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5197 const char *motifstr = "/motif21/libmawt.so";
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5198 char *p;
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5199
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5200 // Get path to libjvm.so
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5201 os::jvm_path(buf, sizeof(buf));
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5202
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5203 // Get rid of libjvm.so
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5204 p = strrchr(buf, '/');
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5205 if (p == NULL) return false;
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5206 else *p = '\0';
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5207
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5208 // Get rid of client or server
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5209 p = strrchr(buf, '/');
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5210 if (p == NULL) return false;
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5211 else *p = '\0';
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5212
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5213 // check xawt/libmawt.so
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5214 strcpy(libmawtpath, buf);
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5215 strcat(libmawtpath, xawtstr);
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5216 if (::stat(libmawtpath, &statbuf) == 0) return false;
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5217
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5218 // check motif21/libmawt.so
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5219 strcpy(libmawtpath, buf);
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5220 strcat(libmawtpath, motifstr);
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5221 if (::stat(libmawtpath, &statbuf) == 0) return false;
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5222
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5223 return true;
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5224 }
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1642
diff changeset
5225