0
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1 /*
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2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // do not include precompiled header file
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26 # include "incls/_os_solaris.cpp.incl"
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27
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28 // put OS-includes here
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29 # include <dlfcn.h>
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30 # include <errno.h>
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31 # include <link.h>
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32 # include <poll.h>
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33 # include <pthread.h>
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34 # include <pwd.h>
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35 # include <schedctl.h>
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36 # include <setjmp.h>
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37 # include <signal.h>
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38 # include <stdio.h>
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39 # include <alloca.h>
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40 # include <sys/filio.h>
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41 # include <sys/ipc.h>
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42 # include <sys/lwp.h>
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43 # include <sys/machelf.h> // for elf Sym structure used by dladdr1
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44 # include <sys/mman.h>
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45 # include <sys/processor.h>
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46 # include <sys/procset.h>
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47 # include <sys/pset.h>
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48 # include <sys/resource.h>
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49 # include <sys/shm.h>
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50 # include <sys/socket.h>
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51 # include <sys/stat.h>
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52 # include <sys/systeminfo.h>
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53 # include <sys/time.h>
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54 # include <sys/times.h>
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55 # include <sys/types.h>
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56 # include <sys/wait.h>
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57 # include <sys/utsname.h>
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58 # include <thread.h>
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59 # include <unistd.h>
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60 # include <sys/priocntl.h>
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61 # include <sys/rtpriocntl.h>
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62 # include <sys/tspriocntl.h>
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63 # include <sys/iapriocntl.h>
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64 # include <sys/loadavg.h>
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65 # include <string.h>
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66
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67 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
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68 # include <sys/procfs.h> // see comment in <sys/procfs.h>
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69
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70 #define MAX_PATH (2 * K)
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71
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72 // for timer info max values which include all bits
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73 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
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74
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75 #ifdef _GNU_SOURCE
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76 // See bug #6514594
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77 extern "C" int madvise(caddr_t, size_t, int);
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78 extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg,
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79 int attr, int mask);
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80 #endif //_GNU_SOURCE
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81
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82 /*
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83 MPSS Changes Start.
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84 The JVM binary needs to be built and run on pre-Solaris 9
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85 systems, but the constants needed by MPSS are only in Solaris 9
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86 header files. They are textually replicated here to allow
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87 building on earlier systems. Once building on Solaris 8 is
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88 no longer a requirement, these #defines can be replaced by ordinary
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89 system .h inclusion.
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90
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91 In earlier versions of the JDK and Solaris, we used ISM for large pages.
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92 But ISM requires shared memory to achieve this and thus has many caveats.
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93 MPSS is a fully transparent and is a cleaner way to get large pages.
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94 Although we still require keeping ISM for backward compatiblitiy as well as
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95 giving the opportunity to use large pages on older systems it is
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96 recommended that MPSS be used for Solaris 9 and above.
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97
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98 */
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99
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100 #ifndef MC_HAT_ADVISE
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101
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102 struct memcntl_mha {
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103 uint_t mha_cmd; /* command(s) */
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104 uint_t mha_flags;
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105 size_t mha_pagesize;
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106 };
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107 #define MC_HAT_ADVISE 7 /* advise hat map size */
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108 #define MHA_MAPSIZE_VA 0x1 /* set preferred page size */
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109 #define MAP_ALIGN 0x200 /* addr specifies alignment */
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110
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111 #endif
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112 // MPSS Changes End.
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113
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114
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115 // Here are some liblgrp types from sys/lgrp_user.h to be able to
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116 // compile on older systems without this header file.
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117
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118 #ifndef MADV_ACCESS_LWP
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119 # define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
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120 #endif
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121 #ifndef MADV_ACCESS_MANY
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122 # define MADV_ACCESS_MANY 8 /* many processes to access heavily */
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123 #endif
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124
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125 // Some more macros from sys/mman.h that are not present in Solaris 8.
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126
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127 #ifndef MAX_MEMINFO_CNT
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128 /*
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129 * info_req request type definitions for meminfo
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130 * request types starting with MEMINFO_V are used for Virtual addresses
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131 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical
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132 * addresses
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133 */
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134 # define MEMINFO_SHIFT 16
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135 # define MEMINFO_MASK (0xFF << MEMINFO_SHIFT)
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136 # define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */
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137 # define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */
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138 # define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */
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139 # define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */
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140 # define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */
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141 # define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */
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142 # define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */
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143
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144 /* maximum number of addresses meminfo() can process at a time */
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145 # define MAX_MEMINFO_CNT 256
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146
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147 /* maximum number of request types */
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148 # define MAX_MEMINFO_REQ 31
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149 #endif
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150
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151 // see thr_setprio(3T) for the basis of these numbers
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152 #define MinimumPriority 0
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153 #define NormalPriority 64
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154 #define MaximumPriority 127
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155
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156 // Values for ThreadPriorityPolicy == 1
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157 int prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64,
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158 80, 96, 112, 124, 127 };
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159
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160 // System parameters used internally
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161 static clock_t clock_tics_per_sec = 100;
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162
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163 // For diagnostics to print a message once. see run_periodic_checks
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164 static bool check_addr0_done = false;
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165 static sigset_t check_signal_done;
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166 static bool check_signals = true;
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167
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168 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
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169 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
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170
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171 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
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172
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173
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174 // "default" initializers for missing libc APIs
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175 extern "C" {
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176 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
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177 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
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178
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179 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
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180 static int lwp_cond_destroy(cond_t *cv) { return 0; }
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181 }
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182
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183 // "default" initializers for pthread-based synchronization
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184 extern "C" {
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185 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
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186 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
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187 }
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188
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189 // Thread Local Storage
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190 // This is common to all Solaris platforms so it is defined here,
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191 // in this common file.
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192 // The declarations are in the os_cpu threadLS*.hpp files.
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193 //
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194 // Static member initialization for TLS
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195 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
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196
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197 #ifndef PRODUCT
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198 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
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199
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200 int ThreadLocalStorage::_tcacheHit = 0;
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201 int ThreadLocalStorage::_tcacheMiss = 0;
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202
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203 void ThreadLocalStorage::print_statistics() {
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204 int total = _tcacheMiss+_tcacheHit;
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205 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
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206 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
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207 }
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208 #undef _PCT
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209 #endif // PRODUCT
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210
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211 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
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212 int index) {
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213 Thread *thread = get_thread_slow();
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214 if (thread != NULL) {
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215 address sp = os::current_stack_pointer();
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216 guarantee(thread->_stack_base == NULL ||
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217 (sp <= thread->_stack_base &&
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218 sp >= thread->_stack_base - thread->_stack_size) ||
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219 is_error_reported(),
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220 "sp must be inside of selected thread stack");
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221
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222 thread->_self_raw_id = raw_id; // mark for quick retrieval
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223 _get_thread_cache[ index ] = thread;
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224 }
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225 return thread;
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226 }
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227
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228
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229 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0};
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230 #define NO_CACHED_THREAD ((Thread*)all_zero)
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231
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232 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
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233
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234 // Store the new value before updating the cache to prevent a race
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235 // between get_thread_via_cache_slowly() and this store operation.
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236 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
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237
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238 // Update thread cache with new thread if setting on thread create,
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239 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
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240 uintptr_t raw = pd_raw_thread_id();
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241 int ix = pd_cache_index(raw);
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242 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
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243 }
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244
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245 void ThreadLocalStorage::pd_init() {
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246 for (int i = 0; i < _pd_cache_size; i++) {
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247 _get_thread_cache[i] = NO_CACHED_THREAD;
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248 }
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249 }
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250
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251 // Invalidate all the caches (happens to be the same as pd_init).
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252 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
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253
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254 #undef NO_CACHED_THREAD
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255
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256 // END Thread Local Storage
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257
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258 static inline size_t adjust_stack_size(address base, size_t size) {
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259 if ((ssize_t)size < 0) {
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260 // 4759953: Compensate for ridiculous stack size.
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261 size = max_intx;
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262 }
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263 if (size > (size_t)base) {
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264 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
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265 size = (size_t)base;
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266 }
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267 return size;
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268 }
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269
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270 static inline stack_t get_stack_info() {
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271 stack_t st;
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272 int retval = thr_stksegment(&st);
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273 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
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274 assert(retval == 0, "incorrect return value from thr_stksegment");
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275 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
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276 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
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277 return st;
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278 }
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279
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280 address os::current_stack_base() {
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281 int r = thr_main() ;
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282 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
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283 bool is_primordial_thread = r;
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284
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285 // Workaround 4352906, avoid calls to thr_stksegment by
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286 // thr_main after the first one (it looks like we trash
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287 // some data, causing the value for ss_sp to be incorrect).
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288 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
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289 stack_t st = get_stack_info();
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290 if (is_primordial_thread) {
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291 // cache initial value of stack base
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292 os::Solaris::_main_stack_base = (address)st.ss_sp;
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293 }
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294 return (address)st.ss_sp;
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295 } else {
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296 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
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297 return os::Solaris::_main_stack_base;
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298 }
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299 }
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300
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301 size_t os::current_stack_size() {
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302 size_t size;
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303
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304 int r = thr_main() ;
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305 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
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306 if(!r) {
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307 size = get_stack_info().ss_size;
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308 } else {
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309 struct rlimit limits;
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310 getrlimit(RLIMIT_STACK, &limits);
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311 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
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312 }
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313 // base may not be page aligned
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314 address base = current_stack_base();
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315 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
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316 return (size_t)(base - bottom);
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317 }
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318
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319 // interruptible infrastructure
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320
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321 // setup_interruptible saves the thread state before going into an
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322 // interruptible system call.
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323 // The saved state is used to restore the thread to
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324 // its former state whether or not an interrupt is received.
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325 // Used by classloader os::read
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326 // hpi calls skip this layer and stay in _thread_in_native
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327
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328 void os::Solaris::setup_interruptible(JavaThread* thread) {
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329
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330 JavaThreadState thread_state = thread->thread_state();
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331
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332 assert(thread_state != _thread_blocked, "Coming from the wrong thread");
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333 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible");
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334 OSThread* osthread = thread->osthread();
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335 osthread->set_saved_interrupt_thread_state(thread_state);
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336 thread->frame_anchor()->make_walkable(thread);
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337 ThreadStateTransition::transition(thread, thread_state, _thread_blocked);
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338 }
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339
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340 // Version of setup_interruptible() for threads that are already in
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341 // _thread_blocked. Used by os_sleep().
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342 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) {
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343 thread->frame_anchor()->make_walkable(thread);
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344 }
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345
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346 JavaThread* os::Solaris::setup_interruptible() {
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347 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
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348 setup_interruptible(thread);
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349 return thread;
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350 }
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351
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352 void os::Solaris::try_enable_extended_io() {
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353 typedef int (*enable_extended_FILE_stdio_t)(int, int);
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354
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355 if (!UseExtendedFileIO) {
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356 return;
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357 }
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358
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359 enable_extended_FILE_stdio_t enabler =
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360 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
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361 "enable_extended_FILE_stdio");
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362 if (enabler) {
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363 enabler(-1, -1);
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364 }
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365 }
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366
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367
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368 #ifdef ASSERT
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369
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370 JavaThread* os::Solaris::setup_interruptible_native() {
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371 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
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372 JavaThreadState thread_state = thread->thread_state();
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373 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
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374 return thread;
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375 }
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376
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377 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) {
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378 JavaThreadState thread_state = thread->thread_state();
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379 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
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380 }
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381 #endif
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382
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383 // cleanup_interruptible reverses the effects of setup_interruptible
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384 // setup_interruptible_already_blocked() does not need any cleanup.
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385
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386 void os::Solaris::cleanup_interruptible(JavaThread* thread) {
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387 OSThread* osthread = thread->osthread();
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388
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389 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state());
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390 }
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391
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392 // I/O interruption related counters called in _INTERRUPTIBLE
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393
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394 void os::Solaris::bump_interrupted_before_count() {
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395 RuntimeService::record_interrupted_before_count();
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396 }
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397
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398 void os::Solaris::bump_interrupted_during_count() {
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399 RuntimeService::record_interrupted_during_count();
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400 }
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401
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402 static int _processors_online = 0;
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403
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404 jint os::Solaris::_os_thread_limit = 0;
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405 volatile jint os::Solaris::_os_thread_count = 0;
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406
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407 julong os::available_memory() {
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408 return Solaris::available_memory();
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409 }
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410
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411 julong os::Solaris::available_memory() {
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412 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
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413 }
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414
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415 julong os::Solaris::_physical_memory = 0;
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416
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417 julong os::physical_memory() {
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418 return Solaris::physical_memory();
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419 }
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420
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421 julong os::allocatable_physical_memory(julong size) {
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422 #ifdef _LP64
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423 return size;
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424 #else
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425 julong result = MIN2(size, (julong)3835*M);
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426 if (!is_allocatable(result)) {
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427 // Memory allocations will be aligned but the alignment
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428 // is not known at this point. Alignments will
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429 // be at most to LargePageSizeInBytes. Protect
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430 // allocations from alignments up to illegal
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431 // values. If at this point 2G is illegal.
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432 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes;
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433 result = MIN2(size, reasonable_size);
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434 }
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435 return result;
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436 #endif
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437 }
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438
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439 static hrtime_t first_hrtime = 0;
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440 static const hrtime_t hrtime_hz = 1000*1000*1000;
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441 const int LOCK_BUSY = 1;
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442 const int LOCK_FREE = 0;
|
|
443 const int LOCK_INVALID = -1;
|
|
444 static volatile hrtime_t max_hrtime = 0;
|
|
445 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress
|
|
446
|
|
447
|
|
448 void os::Solaris::initialize_system_info() {
|
|
449 _processor_count = sysconf(_SC_NPROCESSORS_CONF);
|
|
450 _processors_online = sysconf (_SC_NPROCESSORS_ONLN);
|
|
451 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE);
|
|
452 }
|
|
453
|
|
454 int os::active_processor_count() {
|
|
455 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
|
|
456 pid_t pid = getpid();
|
|
457 psetid_t pset = PS_NONE;
|
|
458 // Are we running in a processor set?
|
|
459 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
|
|
460 if (pset != PS_NONE) {
|
|
461 uint_t pset_cpus;
|
|
462 // Query number of cpus in processor set
|
|
463 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
|
|
464 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
|
|
465 _processors_online = pset_cpus;
|
|
466 return pset_cpus;
|
|
467 }
|
|
468 }
|
|
469 }
|
|
470 // Otherwise return number of online cpus
|
|
471 return online_cpus;
|
|
472 }
|
|
473
|
|
474 static bool find_processors_in_pset(psetid_t pset,
|
|
475 processorid_t** id_array,
|
|
476 uint_t* id_length) {
|
|
477 bool result = false;
|
|
478 // Find the number of processors in the processor set.
|
|
479 if (pset_info(pset, NULL, id_length, NULL) == 0) {
|
|
480 // Make up an array to hold their ids.
|
|
481 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length);
|
|
482 // Fill in the array with their processor ids.
|
|
483 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
|
|
484 result = true;
|
|
485 }
|
|
486 }
|
|
487 return result;
|
|
488 }
|
|
489
|
|
490 // Callers of find_processors_online() must tolerate imprecise results --
|
|
491 // the system configuration can change asynchronously because of DR
|
|
492 // or explicit psradm operations.
|
|
493 //
|
|
494 // We also need to take care that the loop (below) terminates as the
|
|
495 // number of processors online can change between the _SC_NPROCESSORS_ONLN
|
|
496 // request and the loop that builds the list of processor ids. Unfortunately
|
|
497 // there's no reliable way to determine the maximum valid processor id,
|
|
498 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
|
|
499 // man pages, which claim the processor id set is "sparse, but
|
|
500 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
|
|
501 // exit the loop.
|
|
502 //
|
|
503 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
|
|
504 // not available on S8.0.
|
|
505
|
|
506 static bool find_processors_online(processorid_t** id_array,
|
|
507 uint* id_length) {
|
|
508 const processorid_t MAX_PROCESSOR_ID = 100000 ;
|
|
509 // Find the number of processors online.
|
|
510 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
|
|
511 // Make up an array to hold their ids.
|
|
512 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length);
|
|
513 // Processors need not be numbered consecutively.
|
|
514 long found = 0;
|
|
515 processorid_t next = 0;
|
|
516 while (found < *id_length && next < MAX_PROCESSOR_ID) {
|
|
517 processor_info_t info;
|
|
518 if (processor_info(next, &info) == 0) {
|
|
519 // NB, PI_NOINTR processors are effectively online ...
|
|
520 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
|
|
521 (*id_array)[found] = next;
|
|
522 found += 1;
|
|
523 }
|
|
524 }
|
|
525 next += 1;
|
|
526 }
|
|
527 if (found < *id_length) {
|
|
528 // The loop above didn't identify the expected number of processors.
|
|
529 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
|
|
530 // and re-running the loop, above, but there's no guarantee of progress
|
|
531 // if the system configuration is in flux. Instead, we just return what
|
|
532 // we've got. Note that in the worst case find_processors_online() could
|
|
533 // return an empty set. (As a fall-back in the case of the empty set we
|
|
534 // could just return the ID of the current processor).
|
|
535 *id_length = found ;
|
|
536 }
|
|
537
|
|
538 return true;
|
|
539 }
|
|
540
|
|
541 static bool assign_distribution(processorid_t* id_array,
|
|
542 uint id_length,
|
|
543 uint* distribution,
|
|
544 uint distribution_length) {
|
|
545 // We assume we can assign processorid_t's to uint's.
|
|
546 assert(sizeof(processorid_t) == sizeof(uint),
|
|
547 "can't convert processorid_t to uint");
|
|
548 // Quick check to see if we won't succeed.
|
|
549 if (id_length < distribution_length) {
|
|
550 return false;
|
|
551 }
|
|
552 // Assign processor ids to the distribution.
|
|
553 // Try to shuffle processors to distribute work across boards,
|
|
554 // assuming 4 processors per board.
|
|
555 const uint processors_per_board = ProcessDistributionStride;
|
|
556 // Find the maximum processor id.
|
|
557 processorid_t max_id = 0;
|
|
558 for (uint m = 0; m < id_length; m += 1) {
|
|
559 max_id = MAX2(max_id, id_array[m]);
|
|
560 }
|
|
561 // The next id, to limit loops.
|
|
562 const processorid_t limit_id = max_id + 1;
|
|
563 // Make up markers for available processors.
|
|
564 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id);
|
|
565 for (uint c = 0; c < limit_id; c += 1) {
|
|
566 available_id[c] = false;
|
|
567 }
|
|
568 for (uint a = 0; a < id_length; a += 1) {
|
|
569 available_id[id_array[a]] = true;
|
|
570 }
|
|
571 // Step by "boards", then by "slot", copying to "assigned".
|
|
572 // NEEDS_CLEANUP: The assignment of processors should be stateful,
|
|
573 // remembering which processors have been assigned by
|
|
574 // previous calls, etc., so as to distribute several
|
|
575 // independent calls of this method. What we'd like is
|
|
576 // It would be nice to have an API that let us ask
|
|
577 // how many processes are bound to a processor,
|
|
578 // but we don't have that, either.
|
|
579 // In the short term, "board" is static so that
|
|
580 // subsequent distributions don't all start at board 0.
|
|
581 static uint board = 0;
|
|
582 uint assigned = 0;
|
|
583 // Until we've found enough processors ....
|
|
584 while (assigned < distribution_length) {
|
|
585 // ... find the next available processor in the board.
|
|
586 for (uint slot = 0; slot < processors_per_board; slot += 1) {
|
|
587 uint try_id = board * processors_per_board + slot;
|
|
588 if ((try_id < limit_id) && (available_id[try_id] == true)) {
|
|
589 distribution[assigned] = try_id;
|
|
590 available_id[try_id] = false;
|
|
591 assigned += 1;
|
|
592 break;
|
|
593 }
|
|
594 }
|
|
595 board += 1;
|
|
596 if (board * processors_per_board + 0 >= limit_id) {
|
|
597 board = 0;
|
|
598 }
|
|
599 }
|
|
600 if (available_id != NULL) {
|
|
601 FREE_C_HEAP_ARRAY(bool, available_id);
|
|
602 }
|
|
603 return true;
|
|
604 }
|
|
605
|
|
606 bool os::distribute_processes(uint length, uint* distribution) {
|
|
607 bool result = false;
|
|
608 // Find the processor id's of all the available CPUs.
|
|
609 processorid_t* id_array = NULL;
|
|
610 uint id_length = 0;
|
|
611 // There are some races between querying information and using it,
|
|
612 // since processor sets can change dynamically.
|
|
613 psetid_t pset = PS_NONE;
|
|
614 // Are we running in a processor set?
|
|
615 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
|
|
616 result = find_processors_in_pset(pset, &id_array, &id_length);
|
|
617 } else {
|
|
618 result = find_processors_online(&id_array, &id_length);
|
|
619 }
|
|
620 if (result == true) {
|
|
621 if (id_length >= length) {
|
|
622 result = assign_distribution(id_array, id_length, distribution, length);
|
|
623 } else {
|
|
624 result = false;
|
|
625 }
|
|
626 }
|
|
627 if (id_array != NULL) {
|
|
628 FREE_C_HEAP_ARRAY(processorid_t, id_array);
|
|
629 }
|
|
630 return result;
|
|
631 }
|
|
632
|
|
633 bool os::bind_to_processor(uint processor_id) {
|
|
634 // We assume that a processorid_t can be stored in a uint.
|
|
635 assert(sizeof(uint) == sizeof(processorid_t),
|
|
636 "can't convert uint to processorid_t");
|
|
637 int bind_result =
|
|
638 processor_bind(P_LWPID, // bind LWP.
|
|
639 P_MYID, // bind current LWP.
|
|
640 (processorid_t) processor_id, // id.
|
|
641 NULL); // don't return old binding.
|
|
642 return (bind_result == 0);
|
|
643 }
|
|
644
|
|
645 bool os::getenv(const char* name, char* buffer, int len) {
|
|
646 char* val = ::getenv( name );
|
|
647 if ( val == NULL
|
|
648 || strlen(val) + 1 > len ) {
|
|
649 if (len > 0) buffer[0] = 0; // return a null string
|
|
650 return false;
|
|
651 }
|
|
652 strcpy( buffer, val );
|
|
653 return true;
|
|
654 }
|
|
655
|
|
656
|
|
657 // Return true if user is running as root.
|
|
658
|
|
659 bool os::have_special_privileges() {
|
|
660 static bool init = false;
|
|
661 static bool privileges = false;
|
|
662 if (!init) {
|
|
663 privileges = (getuid() != geteuid()) || (getgid() != getegid());
|
|
664 init = true;
|
|
665 }
|
|
666 return privileges;
|
|
667 }
|
|
668
|
|
669
|
|
670 static char* get_property(char* name, char* buffer, int buffer_size) {
|
|
671 if (os::getenv(name, buffer, buffer_size)) {
|
|
672 return buffer;
|
|
673 }
|
|
674 static char empty[] = "";
|
|
675 return empty;
|
|
676 }
|
|
677
|
|
678
|
|
679 void os::init_system_properties_values() {
|
|
680 char arch[12];
|
|
681 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch));
|
|
682
|
|
683 // The next steps are taken in the product version:
|
|
684 //
|
|
685 // Obtain the JAVA_HOME value from the location of libjvm[_g].so.
|
|
686 // This library should be located at:
|
|
687 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so.
|
|
688 //
|
|
689 // If "/jre/lib/" appears at the right place in the path, then we
|
|
690 // assume libjvm[_g].so is installed in a JDK and we use this path.
|
|
691 //
|
|
692 // Otherwise exit with message: "Could not create the Java virtual machine."
|
|
693 //
|
|
694 // The following extra steps are taken in the debugging version:
|
|
695 //
|
|
696 // If "/jre/lib/" does NOT appear at the right place in the path
|
|
697 // instead of exit check for $JAVA_HOME environment variable.
|
|
698 //
|
|
699 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
|
|
700 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so
|
|
701 // it looks like libjvm[_g].so is installed there
|
|
702 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so.
|
|
703 //
|
|
704 // Otherwise exit.
|
|
705 //
|
|
706 // Important note: if the location of libjvm.so changes this
|
|
707 // code needs to be changed accordingly.
|
|
708
|
|
709 // The next few definitions allow the code to be verbatim:
|
|
710 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n))
|
|
711 #define free(p) FREE_C_HEAP_ARRAY(char, p)
|
|
712 #define getenv(n) ::getenv(n)
|
|
713
|
|
714 #define EXTENSIONS_DIR "/lib/ext"
|
|
715 #define ENDORSED_DIR "/lib/endorsed"
|
|
716 #define COMMON_DIR "/usr/jdk/packages"
|
|
717
|
|
718 {
|
|
719 /* sysclasspath, java_home, dll_dir */
|
|
720 {
|
|
721 char *home_path;
|
|
722 char *dll_path;
|
|
723 char *pslash;
|
|
724 char buf[MAXPATHLEN];
|
|
725 os::jvm_path(buf, sizeof(buf));
|
|
726
|
|
727 // Found the full path to libjvm.so.
|
|
728 // Now cut the path to <java_home>/jre if we can.
|
|
729 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */
|
|
730 pslash = strrchr(buf, '/');
|
|
731 if (pslash != NULL)
|
|
732 *pslash = '\0'; /* get rid of /{client|server|hotspot} */
|
|
733 dll_path = malloc(strlen(buf) + 1);
|
|
734 if (dll_path == NULL)
|
|
735 return;
|
|
736 strcpy(dll_path, buf);
|
|
737 Arguments::set_dll_dir(dll_path);
|
|
738
|
|
739 if (pslash != NULL) {
|
|
740 pslash = strrchr(buf, '/');
|
|
741 if (pslash != NULL) {
|
|
742 *pslash = '\0'; /* get rid of /<arch> */
|
|
743 pslash = strrchr(buf, '/');
|
|
744 if (pslash != NULL)
|
|
745 *pslash = '\0'; /* get rid of /lib */
|
|
746 }
|
|
747 }
|
|
748
|
|
749 home_path = malloc(strlen(buf) + 1);
|
|
750 if (home_path == NULL)
|
|
751 return;
|
|
752 strcpy(home_path, buf);
|
|
753 Arguments::set_java_home(home_path);
|
|
754
|
|
755 if (!set_boot_path('/', ':'))
|
|
756 return;
|
|
757 }
|
|
758
|
|
759 /*
|
|
760 * Where to look for native libraries
|
|
761 */
|
|
762 {
|
|
763 // Use dlinfo() to determine the correct java.library.path.
|
|
764 //
|
|
765 // If we're launched by the Java launcher, and the user
|
|
766 // does not set java.library.path explicitly on the commandline,
|
|
767 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
|
|
768 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
|
|
769 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
|
|
770 // /usr/lib), which is exactly what we want.
|
|
771 //
|
|
772 // If the user does set java.library.path, it completely
|
|
773 // overwrites this setting, and always has.
|
|
774 //
|
|
775 // If we're not launched by the Java launcher, we may
|
|
776 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
|
|
777 // settings. Again, dlinfo does exactly what we want.
|
|
778
|
|
779 Dl_serinfo _info, *info = &_info;
|
|
780 Dl_serpath *path;
|
|
781 char* library_path;
|
|
782 char *common_path;
|
|
783 int i;
|
|
784
|
|
785 // determine search path count and required buffer size
|
|
786 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
|
|
787 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
|
|
788 }
|
|
789
|
|
790 // allocate new buffer and initialize
|
|
791 info = (Dl_serinfo*)malloc(_info.dls_size);
|
|
792 if (info == NULL) {
|
|
793 vm_exit_out_of_memory(_info.dls_size,
|
|
794 "init_system_properties_values info");
|
|
795 }
|
|
796 info->dls_size = _info.dls_size;
|
|
797 info->dls_cnt = _info.dls_cnt;
|
|
798
|
|
799 // obtain search path information
|
|
800 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
|
|
801 free(info);
|
|
802 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
|
|
803 }
|
|
804
|
|
805 path = &info->dls_serpath[0];
|
|
806
|
|
807 // Note: Due to a legacy implementation, most of the library path
|
|
808 // is set in the launcher. This was to accomodate linking restrictions
|
|
809 // on legacy Solaris implementations (which are no longer supported).
|
|
810 // Eventually, all the library path setting will be done here.
|
|
811 //
|
|
812 // However, to prevent the proliferation of improperly built native
|
|
813 // libraries, the new path component /usr/jdk/packages is added here.
|
|
814
|
|
815 // Determine the actual CPU architecture.
|
|
816 char cpu_arch[12];
|
|
817 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
|
|
818 #ifdef _LP64
|
|
819 // If we are a 64-bit vm, perform the following translations:
|
|
820 // sparc -> sparcv9
|
|
821 // i386 -> amd64
|
|
822 if (strcmp(cpu_arch, "sparc") == 0)
|
|
823 strcat(cpu_arch, "v9");
|
|
824 else if (strcmp(cpu_arch, "i386") == 0)
|
|
825 strcpy(cpu_arch, "amd64");
|
|
826 #endif
|
|
827
|
|
828 // Construct the invariant part of ld_library_path. Note that the
|
|
829 // space for the colon and the trailing null are provided by the
|
|
830 // nulls included by the sizeof operator.
|
|
831 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch);
|
|
832 common_path = malloc(bufsize);
|
|
833 if (common_path == NULL) {
|
|
834 free(info);
|
|
835 vm_exit_out_of_memory(bufsize,
|
|
836 "init_system_properties_values common_path");
|
|
837 }
|
|
838 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch);
|
|
839
|
|
840 // struct size is more than sufficient for the path components obtained
|
|
841 // through the dlinfo() call, so only add additional space for the path
|
|
842 // components explicitly added here.
|
|
843 bufsize = info->dls_size + strlen(common_path);
|
|
844 library_path = malloc(bufsize);
|
|
845 if (library_path == NULL) {
|
|
846 free(info);
|
|
847 free(common_path);
|
|
848 vm_exit_out_of_memory(bufsize,
|
|
849 "init_system_properties_values library_path");
|
|
850 }
|
|
851 library_path[0] = '\0';
|
|
852
|
|
853 // Construct the desired Java library path from the linker's library
|
|
854 // search path.
|
|
855 //
|
|
856 // For compatibility, it is optimal that we insert the additional path
|
|
857 // components specific to the Java VM after those components specified
|
|
858 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
|
|
859 // infrastructure.
|
|
860 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it
|
|
861 strcpy(library_path, common_path);
|
|
862 } else {
|
|
863 int inserted = 0;
|
|
864 for (i = 0; i < info->dls_cnt; i++, path++) {
|
|
865 uint_t flags = path->dls_flags & LA_SER_MASK;
|
|
866 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
|
|
867 strcat(library_path, common_path);
|
|
868 strcat(library_path, os::path_separator());
|
|
869 inserted = 1;
|
|
870 }
|
|
871 strcat(library_path, path->dls_name);
|
|
872 strcat(library_path, os::path_separator());
|
|
873 }
|
|
874 // eliminate trailing path separator
|
|
875 library_path[strlen(library_path)-1] = '\0';
|
|
876 }
|
|
877
|
|
878 // happens before argument parsing - can't use a trace flag
|
|
879 // tty->print_raw("init_system_properties_values: native lib path: ");
|
|
880 // tty->print_raw_cr(library_path);
|
|
881
|
|
882 // callee copies into its own buffer
|
|
883 Arguments::set_library_path(library_path);
|
|
884
|
|
885 free(common_path);
|
|
886 free(library_path);
|
|
887 free(info);
|
|
888 }
|
|
889
|
|
890 /*
|
|
891 * Extensions directories.
|
|
892 *
|
|
893 * Note that the space for the colon and the trailing null are provided
|
|
894 * by the nulls included by the sizeof operator (so actually one byte more
|
|
895 * than necessary is allocated).
|
|
896 */
|
|
897 {
|
|
898 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) +
|
|
899 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) +
|
|
900 sizeof(EXTENSIONS_DIR));
|
|
901 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR,
|
|
902 Arguments::get_java_home());
|
|
903 Arguments::set_ext_dirs(buf);
|
|
904 }
|
|
905
|
|
906 /* Endorsed standards default directory. */
|
|
907 {
|
|
908 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR));
|
|
909 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home());
|
|
910 Arguments::set_endorsed_dirs(buf);
|
|
911 }
|
|
912 }
|
|
913
|
|
914 #undef malloc
|
|
915 #undef free
|
|
916 #undef getenv
|
|
917 #undef EXTENSIONS_DIR
|
|
918 #undef ENDORSED_DIR
|
|
919 #undef COMMON_DIR
|
|
920
|
|
921 }
|
|
922
|
|
923 void os::breakpoint() {
|
|
924 BREAKPOINT;
|
|
925 }
|
|
926
|
|
927 bool os::obsolete_option(const JavaVMOption *option)
|
|
928 {
|
|
929 if (!strncmp(option->optionString, "-Xt", 3)) {
|
|
930 return true;
|
|
931 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
|
|
932 return true;
|
|
933 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
|
|
934 return true;
|
|
935 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
|
|
936 return true;
|
|
937 }
|
|
938 return false;
|
|
939 }
|
|
940
|
|
941 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
|
|
942 address stackStart = (address)thread->stack_base();
|
|
943 address stackEnd = (address)(stackStart - (address)thread->stack_size());
|
|
944 if (sp < stackStart && sp >= stackEnd ) return true;
|
|
945 return false;
|
|
946 }
|
|
947
|
|
948 extern "C" void breakpoint() {
|
|
949 // use debugger to set breakpoint here
|
|
950 }
|
|
951
|
|
952 // Returns an estimate of the current stack pointer. Result must be guaranteed to
|
|
953 // point into the calling threads stack, and be no lower than the current stack
|
|
954 // pointer.
|
|
955 address os::current_stack_pointer() {
|
|
956 volatile int dummy;
|
|
957 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right
|
|
958 return sp;
|
|
959 }
|
|
960
|
|
961 static thread_t main_thread;
|
|
962
|
|
963 // Thread start routine for all new Java threads
|
|
964 extern "C" void* java_start(void* thread_addr) {
|
|
965 // Try to randomize the cache line index of hot stack frames.
|
|
966 // This helps when threads of the same stack traces evict each other's
|
|
967 // cache lines. The threads can be either from the same JVM instance, or
|
|
968 // from different JVM instances. The benefit is especially true for
|
|
969 // processors with hyperthreading technology.
|
|
970 static int counter = 0;
|
|
971 int pid = os::current_process_id();
|
|
972 alloca(((pid ^ counter++) & 7) * 128);
|
|
973
|
|
974 int prio;
|
|
975 Thread* thread = (Thread*)thread_addr;
|
|
976 OSThread* osthr = thread->osthread();
|
|
977
|
|
978 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound
|
|
979 thread->_schedctl = (void *) schedctl_init () ;
|
|
980
|
|
981 if (UseNUMA) {
|
|
982 int lgrp_id = os::numa_get_group_id();
|
|
983 if (lgrp_id != -1) {
|
|
984 thread->set_lgrp_id(lgrp_id);
|
|
985 }
|
|
986 }
|
|
987
|
|
988 // If the creator called set priority before we started,
|
|
989 // we need to call set priority now that we have an lwp.
|
|
990 // Get the priority from libthread and set the priority
|
|
991 // for the new Solaris lwp.
|
|
992 if ( osthr->thread_id() != -1 ) {
|
|
993 if ( UseThreadPriorities ) {
|
|
994 thr_getprio(osthr->thread_id(), &prio);
|
|
995 if (ThreadPriorityVerbose) {
|
|
996 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n",
|
|
997 osthr->thread_id(), osthr->lwp_id(), prio );
|
|
998 }
|
|
999 os::set_native_priority(thread, prio);
|
|
1000 }
|
|
1001 } else if (ThreadPriorityVerbose) {
|
|
1002 warning("Can't set priority in _start routine, thread id hasn't been set\n");
|
|
1003 }
|
|
1004
|
|
1005 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
|
|
1006
|
|
1007 // initialize signal mask for this thread
|
|
1008 os::Solaris::hotspot_sigmask(thread);
|
|
1009
|
|
1010 thread->run();
|
|
1011
|
|
1012 // One less thread is executing
|
|
1013 // When the VMThread gets here, the main thread may have already exited
|
|
1014 // which frees the CodeHeap containing the Atomic::dec code
|
|
1015 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
|
|
1016 Atomic::dec(&os::Solaris::_os_thread_count);
|
|
1017 }
|
|
1018
|
|
1019 if (UseDetachedThreads) {
|
|
1020 thr_exit(NULL);
|
|
1021 ShouldNotReachHere();
|
|
1022 }
|
|
1023 return NULL;
|
|
1024 }
|
|
1025
|
|
1026 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
|
|
1027 // Allocate the OSThread object
|
|
1028 OSThread* osthread = new OSThread(NULL, NULL);
|
|
1029 if (osthread == NULL) return NULL;
|
|
1030
|
|
1031 // Store info on the Solaris thread into the OSThread
|
|
1032 osthread->set_thread_id(thread_id);
|
|
1033 osthread->set_lwp_id(_lwp_self());
|
|
1034 thread->_schedctl = (void *) schedctl_init () ;
|
|
1035
|
|
1036 if (UseNUMA) {
|
|
1037 int lgrp_id = os::numa_get_group_id();
|
|
1038 if (lgrp_id != -1) {
|
|
1039 thread->set_lgrp_id(lgrp_id);
|
|
1040 }
|
|
1041 }
|
|
1042
|
|
1043 if ( ThreadPriorityVerbose ) {
|
|
1044 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
|
|
1045 osthread->thread_id(), osthread->lwp_id() );
|
|
1046 }
|
|
1047
|
|
1048 // Initial thread state is INITIALIZED, not SUSPENDED
|
|
1049 osthread->set_state(INITIALIZED);
|
|
1050
|
|
1051 return osthread;
|
|
1052 }
|
|
1053
|
|
1054 void os::Solaris::hotspot_sigmask(Thread* thread) {
|
|
1055
|
|
1056 //Save caller's signal mask
|
|
1057 sigset_t sigmask;
|
|
1058 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
|
|
1059 OSThread *osthread = thread->osthread();
|
|
1060 osthread->set_caller_sigmask(sigmask);
|
|
1061
|
|
1062 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
|
|
1063 if (!ReduceSignalUsage) {
|
|
1064 if (thread->is_VM_thread()) {
|
|
1065 // Only the VM thread handles BREAK_SIGNAL ...
|
|
1066 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
|
|
1067 } else {
|
|
1068 // ... all other threads block BREAK_SIGNAL
|
|
1069 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
|
|
1070 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
|
|
1071 }
|
|
1072 }
|
|
1073 }
|
|
1074
|
|
1075 bool os::create_attached_thread(JavaThread* thread) {
|
|
1076 #ifdef ASSERT
|
|
1077 thread->verify_not_published();
|
|
1078 #endif
|
|
1079 OSThread* osthread = create_os_thread(thread, thr_self());
|
|
1080 if (osthread == NULL) {
|
|
1081 return false;
|
|
1082 }
|
|
1083
|
|
1084 // Initial thread state is RUNNABLE
|
|
1085 osthread->set_state(RUNNABLE);
|
|
1086 thread->set_osthread(osthread);
|
|
1087
|
|
1088 // initialize signal mask for this thread
|
|
1089 // and save the caller's signal mask
|
|
1090 os::Solaris::hotspot_sigmask(thread);
|
|
1091
|
|
1092 return true;
|
|
1093 }
|
|
1094
|
|
1095 bool os::create_main_thread(JavaThread* thread) {
|
|
1096 #ifdef ASSERT
|
|
1097 thread->verify_not_published();
|
|
1098 #endif
|
|
1099 if (_starting_thread == NULL) {
|
|
1100 _starting_thread = create_os_thread(thread, main_thread);
|
|
1101 if (_starting_thread == NULL) {
|
|
1102 return false;
|
|
1103 }
|
|
1104 }
|
|
1105
|
|
1106 // The primodial thread is runnable from the start
|
|
1107 _starting_thread->set_state(RUNNABLE);
|
|
1108
|
|
1109 thread->set_osthread(_starting_thread);
|
|
1110
|
|
1111 // initialize signal mask for this thread
|
|
1112 // and save the caller's signal mask
|
|
1113 os::Solaris::hotspot_sigmask(thread);
|
|
1114
|
|
1115 return true;
|
|
1116 }
|
|
1117
|
|
1118 // _T2_libthread is true if we believe we are running with the newer
|
|
1119 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default)
|
|
1120 bool os::Solaris::_T2_libthread = false;
|
|
1121
|
|
1122 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
|
|
1123 // Allocate the OSThread object
|
|
1124 OSThread* osthread = new OSThread(NULL, NULL);
|
|
1125 if (osthread == NULL) {
|
|
1126 return false;
|
|
1127 }
|
|
1128
|
|
1129 if ( ThreadPriorityVerbose ) {
|
|
1130 char *thrtyp;
|
|
1131 switch ( thr_type ) {
|
|
1132 case vm_thread:
|
|
1133 thrtyp = (char *)"vm";
|
|
1134 break;
|
|
1135 case cgc_thread:
|
|
1136 thrtyp = (char *)"cgc";
|
|
1137 break;
|
|
1138 case pgc_thread:
|
|
1139 thrtyp = (char *)"pgc";
|
|
1140 break;
|
|
1141 case java_thread:
|
|
1142 thrtyp = (char *)"java";
|
|
1143 break;
|
|
1144 case compiler_thread:
|
|
1145 thrtyp = (char *)"compiler";
|
|
1146 break;
|
|
1147 case watcher_thread:
|
|
1148 thrtyp = (char *)"watcher";
|
|
1149 break;
|
|
1150 default:
|
|
1151 thrtyp = (char *)"unknown";
|
|
1152 break;
|
|
1153 }
|
|
1154 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
|
|
1155 }
|
|
1156
|
|
1157 // Calculate stack size if it's not specified by caller.
|
|
1158 if (stack_size == 0) {
|
|
1159 // The default stack size 1M (2M for LP64).
|
|
1160 stack_size = (BytesPerWord >> 2) * K * K;
|
|
1161
|
|
1162 switch (thr_type) {
|
|
1163 case os::java_thread:
|
|
1164 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
|
|
1165 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
|
|
1166 break;
|
|
1167 case os::compiler_thread:
|
|
1168 if (CompilerThreadStackSize > 0) {
|
|
1169 stack_size = (size_t)(CompilerThreadStackSize * K);
|
|
1170 break;
|
|
1171 } // else fall through:
|
|
1172 // use VMThreadStackSize if CompilerThreadStackSize is not defined
|
|
1173 case os::vm_thread:
|
|
1174 case os::pgc_thread:
|
|
1175 case os::cgc_thread:
|
|
1176 case os::watcher_thread:
|
|
1177 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
|
|
1178 break;
|
|
1179 }
|
|
1180 }
|
|
1181 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
|
|
1182
|
|
1183 // Initial state is ALLOCATED but not INITIALIZED
|
|
1184 osthread->set_state(ALLOCATED);
|
|
1185
|
|
1186 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
|
|
1187 // We got lots of threads. Check if we still have some address space left.
|
|
1188 // Need to be at least 5Mb of unreserved address space. We do check by
|
|
1189 // trying to reserve some.
|
|
1190 const size_t VirtualMemoryBangSize = 20*K*K;
|
|
1191 char* mem = os::reserve_memory(VirtualMemoryBangSize);
|
|
1192 if (mem == NULL) {
|
|
1193 delete osthread;
|
|
1194 return false;
|
|
1195 } else {
|
|
1196 // Release the memory again
|
|
1197 os::release_memory(mem, VirtualMemoryBangSize);
|
|
1198 }
|
|
1199 }
|
|
1200
|
|
1201 // Setup osthread because the child thread may need it.
|
|
1202 thread->set_osthread(osthread);
|
|
1203
|
|
1204 // Create the Solaris thread
|
|
1205 // explicit THR_BOUND for T2_libthread case in case
|
|
1206 // that assumption is not accurate, but our alternate signal stack
|
|
1207 // handling is based on it which must have bound threads
|
|
1208 thread_t tid = 0;
|
|
1209 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED
|
|
1210 | ((UseBoundThreads || os::Solaris::T2_libthread() ||
|
|
1211 (thr_type == vm_thread) ||
|
|
1212 (thr_type == cgc_thread) ||
|
|
1213 (thr_type == pgc_thread) ||
|
|
1214 (thr_type == compiler_thread && BackgroundCompilation)) ?
|
|
1215 THR_BOUND : 0);
|
|
1216 int status;
|
|
1217
|
|
1218 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs.
|
|
1219 //
|
|
1220 // On multiprocessors systems, libthread sometimes under-provisions our
|
|
1221 // process with LWPs. On a 30-way systems, for instance, we could have
|
|
1222 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned
|
|
1223 // to our process. This can result in under utilization of PEs.
|
|
1224 // I suspect the problem is related to libthread's LWP
|
|
1225 // pool management and to the kernel's SIGBLOCKING "last LWP parked"
|
|
1226 // upcall policy.
|
|
1227 //
|
|
1228 // The following code is palliative -- it attempts to ensure that our
|
|
1229 // process has sufficient LWPs to take advantage of multiple PEs.
|
|
1230 // Proper long-term cures include using user-level threads bound to LWPs
|
|
1231 // (THR_BOUND) or using LWP-based synchronization. Note that there is a
|
|
1232 // slight timing window with respect to sampling _os_thread_count, but
|
|
1233 // the race is benign. Also, we should periodically recompute
|
|
1234 // _processors_online as the min of SC_NPROCESSORS_ONLN and the
|
|
1235 // the number of PEs in our partition. You might be tempted to use
|
|
1236 // THR_NEW_LWP here, but I'd recommend against it as that could
|
|
1237 // result in undesirable growth of the libthread's LWP pool.
|
|
1238 // The fix below isn't sufficient; for instance, it doesn't take into count
|
|
1239 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks.
|
|
1240 //
|
|
1241 // Some pathologies this scheme doesn't handle:
|
|
1242 // * Threads can block, releasing the LWPs. The LWPs can age out.
|
|
1243 // When a large number of threads become ready again there aren't
|
|
1244 // enough LWPs available to service them. This can occur when the
|
|
1245 // number of ready threads oscillates.
|
|
1246 // * LWPs/Threads park on IO, thus taking the LWP out of circulation.
|
|
1247 //
|
|
1248 // Finally, we should call thr_setconcurrency() periodically to refresh
|
|
1249 // the LWP pool and thwart the LWP age-out mechanism.
|
|
1250 // The "+3" term provides a little slop -- we want to slightly overprovision.
|
|
1251
|
|
1252 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) {
|
|
1253 if (!(flags & THR_BOUND)) {
|
|
1254 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation
|
|
1255 }
|
|
1256 }
|
|
1257 // Although this doesn't hurt, we should warn of undefined behavior
|
|
1258 // when using unbound T1 threads with schedctl(). This should never
|
|
1259 // happen, as the compiler and VM threads are always created bound
|
|
1260 DEBUG_ONLY(
|
|
1261 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) &&
|
|
1262 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) &&
|
|
1263 ((thr_type == vm_thread) || (thr_type == cgc_thread) ||
|
|
1264 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) {
|
|
1265 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound");
|
|
1266 }
|
|
1267 );
|
|
1268
|
|
1269
|
|
1270 // Mark that we don't have an lwp or thread id yet.
|
|
1271 // In case we attempt to set the priority before the thread starts.
|
|
1272 osthread->set_lwp_id(-1);
|
|
1273 osthread->set_thread_id(-1);
|
|
1274
|
|
1275 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
|
|
1276 if (status != 0) {
|
|
1277 if (PrintMiscellaneous && (Verbose || WizardMode)) {
|
|
1278 perror("os::create_thread");
|
|
1279 }
|
|
1280 thread->set_osthread(NULL);
|
|
1281 // Need to clean up stuff we've allocated so far
|
|
1282 delete osthread;
|
|
1283 return false;
|
|
1284 }
|
|
1285
|
|
1286 Atomic::inc(&os::Solaris::_os_thread_count);
|
|
1287
|
|
1288 // Store info on the Solaris thread into the OSThread
|
|
1289 osthread->set_thread_id(tid);
|
|
1290
|
|
1291 // Remember that we created this thread so we can set priority on it
|
|
1292 osthread->set_vm_created();
|
|
1293
|
|
1294 // Set the default thread priority otherwise use NormalPriority
|
|
1295
|
|
1296 if ( UseThreadPriorities ) {
|
|
1297 thr_setprio(tid, (DefaultThreadPriority == -1) ?
|
|
1298 java_to_os_priority[NormPriority] :
|
|
1299 DefaultThreadPriority);
|
|
1300 }
|
|
1301
|
|
1302 // Initial thread state is INITIALIZED, not SUSPENDED
|
|
1303 osthread->set_state(INITIALIZED);
|
|
1304
|
|
1305 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
|
|
1306 return true;
|
|
1307 }
|
|
1308
|
|
1309 /* defined for >= Solaris 10. This allows builds on earlier versions
|
|
1310 * of Solaris to take advantage of the newly reserved Solaris JVM signals
|
|
1311 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
|
|
1312 * and -XX:+UseAltSigs does nothing since these should have no conflict
|
|
1313 */
|
|
1314 #if !defined(SIGJVM1)
|
|
1315 #define SIGJVM1 39
|
|
1316 #define SIGJVM2 40
|
|
1317 #endif
|
|
1318
|
|
1319 debug_only(static bool signal_sets_initialized = false);
|
|
1320 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
|
|
1321 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
|
|
1322 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
|
|
1323
|
|
1324 bool os::Solaris::is_sig_ignored(int sig) {
|
|
1325 struct sigaction oact;
|
|
1326 sigaction(sig, (struct sigaction*)NULL, &oact);
|
|
1327 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
|
|
1328 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
|
|
1329 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN))
|
|
1330 return true;
|
|
1331 else
|
|
1332 return false;
|
|
1333 }
|
|
1334
|
|
1335 // Note: SIGRTMIN is a macro that calls sysconf() so it will
|
|
1336 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
|
|
1337 static bool isJVM1available() {
|
|
1338 return SIGJVM1 < SIGRTMIN;
|
|
1339 }
|
|
1340
|
|
1341 void os::Solaris::signal_sets_init() {
|
|
1342 // Should also have an assertion stating we are still single-threaded.
|
|
1343 assert(!signal_sets_initialized, "Already initialized");
|
|
1344 // Fill in signals that are necessarily unblocked for all threads in
|
|
1345 // the VM. Currently, we unblock the following signals:
|
|
1346 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
|
|
1347 // by -Xrs (=ReduceSignalUsage));
|
|
1348 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
|
|
1349 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
|
|
1350 // the dispositions or masks wrt these signals.
|
|
1351 // Programs embedding the VM that want to use the above signals for their
|
|
1352 // own purposes must, at this time, use the "-Xrs" option to prevent
|
|
1353 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
|
|
1354 // (See bug 4345157, and other related bugs).
|
|
1355 // In reality, though, unblocking these signals is really a nop, since
|
|
1356 // these signals are not blocked by default.
|
|
1357 sigemptyset(&unblocked_sigs);
|
|
1358 sigemptyset(&allowdebug_blocked_sigs);
|
|
1359 sigaddset(&unblocked_sigs, SIGILL);
|
|
1360 sigaddset(&unblocked_sigs, SIGSEGV);
|
|
1361 sigaddset(&unblocked_sigs, SIGBUS);
|
|
1362 sigaddset(&unblocked_sigs, SIGFPE);
|
|
1363
|
|
1364 if (isJVM1available) {
|
|
1365 os::Solaris::set_SIGinterrupt(SIGJVM1);
|
|
1366 os::Solaris::set_SIGasync(SIGJVM2);
|
|
1367 } else if (UseAltSigs) {
|
|
1368 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
|
|
1369 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
|
|
1370 } else {
|
|
1371 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
|
|
1372 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
|
|
1373 }
|
|
1374
|
|
1375 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
|
|
1376 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
|
|
1377
|
|
1378 if (!ReduceSignalUsage) {
|
|
1379 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
|
|
1380 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
|
|
1381 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
|
|
1382 }
|
|
1383 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
|
|
1384 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
|
|
1385 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
|
|
1386 }
|
|
1387 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
|
|
1388 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
|
|
1389 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
|
|
1390 }
|
|
1391 }
|
|
1392 // Fill in signals that are blocked by all but the VM thread.
|
|
1393 sigemptyset(&vm_sigs);
|
|
1394 if (!ReduceSignalUsage)
|
|
1395 sigaddset(&vm_sigs, BREAK_SIGNAL);
|
|
1396 debug_only(signal_sets_initialized = true);
|
|
1397
|
|
1398 // For diagnostics only used in run_periodic_checks
|
|
1399 sigemptyset(&check_signal_done);
|
|
1400 }
|
|
1401
|
|
1402 // These are signals that are unblocked while a thread is running Java.
|
|
1403 // (For some reason, they get blocked by default.)
|
|
1404 sigset_t* os::Solaris::unblocked_signals() {
|
|
1405 assert(signal_sets_initialized, "Not initialized");
|
|
1406 return &unblocked_sigs;
|
|
1407 }
|
|
1408
|
|
1409 // These are the signals that are blocked while a (non-VM) thread is
|
|
1410 // running Java. Only the VM thread handles these signals.
|
|
1411 sigset_t* os::Solaris::vm_signals() {
|
|
1412 assert(signal_sets_initialized, "Not initialized");
|
|
1413 return &vm_sigs;
|
|
1414 }
|
|
1415
|
|
1416 // These are signals that are blocked during cond_wait to allow debugger in
|
|
1417 sigset_t* os::Solaris::allowdebug_blocked_signals() {
|
|
1418 assert(signal_sets_initialized, "Not initialized");
|
|
1419 return &allowdebug_blocked_sigs;
|
|
1420 }
|
|
1421
|
|
1422 // First crack at OS-specific initialization, from inside the new thread.
|
|
1423 void os::initialize_thread() {
|
|
1424 int r = thr_main() ;
|
|
1425 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
|
|
1426 if (r) {
|
|
1427 JavaThread* jt = (JavaThread *)Thread::current();
|
|
1428 assert(jt != NULL,"Sanity check");
|
|
1429 size_t stack_size;
|
|
1430 address base = jt->stack_base();
|
|
1431 if (Arguments::created_by_java_launcher()) {
|
|
1432 // Use 2MB to allow for Solaris 7 64 bit mode.
|
|
1433 stack_size = JavaThread::stack_size_at_create() == 0
|
|
1434 ? 2048*K : JavaThread::stack_size_at_create();
|
|
1435
|
|
1436 // There are rare cases when we may have already used more than
|
|
1437 // the basic stack size allotment before this method is invoked.
|
|
1438 // Attempt to allow for a normally sized java_stack.
|
|
1439 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
|
|
1440 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
|
|
1441 } else {
|
|
1442 // 6269555: If we were not created by a Java launcher, i.e. if we are
|
|
1443 // running embedded in a native application, treat the primordial thread
|
|
1444 // as much like a native attached thread as possible. This means using
|
|
1445 // the current stack size from thr_stksegment(), unless it is too large
|
|
1446 // to reliably setup guard pages. A reasonable max size is 8MB.
|
|
1447 size_t current_size = current_stack_size();
|
|
1448 // This should never happen, but just in case....
|
|
1449 if (current_size == 0) current_size = 2 * K * K;
|
|
1450 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
|
|
1451 }
|
|
1452 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
|
|
1453 stack_size = (size_t)(base - bottom);
|
|
1454
|
|
1455 assert(stack_size > 0, "Stack size calculation problem");
|
|
1456
|
|
1457 if (stack_size > jt->stack_size()) {
|
|
1458 NOT_PRODUCT(
|
|
1459 struct rlimit limits;
|
|
1460 getrlimit(RLIMIT_STACK, &limits);
|
|
1461 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
|
|
1462 assert(size >= jt->stack_size(), "Stack size problem in main thread");
|
|
1463 )
|
|
1464 tty->print_cr(
|
|
1465 "Stack size of %d Kb exceeds current limit of %d Kb.\n"
|
|
1466 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
|
|
1467 "See limit(1) to increase the stack size limit.",
|
|
1468 stack_size / K, jt->stack_size() / K);
|
|
1469 vm_exit(1);
|
|
1470 }
|
|
1471 assert(jt->stack_size() >= stack_size,
|
|
1472 "Attempt to map more stack than was allocated");
|
|
1473 jt->set_stack_size(stack_size);
|
|
1474 }
|
|
1475
|
|
1476 // 5/22/01: Right now alternate signal stacks do not handle
|
|
1477 // throwing stack overflow exceptions, see bug 4463178
|
|
1478 // Until a fix is found for this, T2 will NOT imply alternate signal
|
|
1479 // stacks.
|
|
1480 // If using T2 libthread threads, install an alternate signal stack.
|
|
1481 // Because alternate stacks associate with LWPs on Solaris,
|
|
1482 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads
|
|
1483 // we prefer to explicitly stack bang.
|
|
1484 // If not using T2 libthread, but using UseBoundThreads any threads
|
|
1485 // (primordial thread, jni_attachCurrentThread) we do not create,
|
|
1486 // probably are not bound, therefore they can not have an alternate
|
|
1487 // signal stack. Since our stack banging code is generated and
|
|
1488 // is shared across threads, all threads must be bound to allow
|
|
1489 // using alternate signal stacks. The alternative is to interpose
|
|
1490 // on _lwp_create to associate an alt sig stack with each LWP,
|
|
1491 // and this could be a problem when the JVM is embedded.
|
|
1492 // We would prefer to use alternate signal stacks with T2
|
|
1493 // Since there is currently no accurate way to detect T2
|
|
1494 // we do not. Assuming T2 when running T1 causes sig 11s or assertions
|
|
1495 // on installing alternate signal stacks
|
|
1496
|
|
1497
|
|
1498 // 05/09/03: removed alternate signal stack support for Solaris
|
|
1499 // The alternate signal stack mechanism is no longer needed to
|
|
1500 // handle stack overflow. This is now handled by allocating
|
|
1501 // guard pages (red zone) and stackbanging.
|
|
1502 // Initially the alternate signal stack mechanism was removed because
|
|
1503 // it did not work with T1 llibthread. Alternate
|
|
1504 // signal stacks MUST have all threads bound to lwps. Applications
|
|
1505 // can create their own threads and attach them without their being
|
|
1506 // bound under T1. This is frequently the case for the primordial thread.
|
|
1507 // If we were ever to reenable this mechanism we would need to
|
|
1508 // use the dynamic check for T2 libthread.
|
|
1509
|
|
1510 os::Solaris::init_thread_fpu_state();
|
|
1511 }
|
|
1512
|
|
1513
|
|
1514
|
|
1515 // Free Solaris resources related to the OSThread
|
|
1516 void os::free_thread(OSThread* osthread) {
|
|
1517 assert(osthread != NULL, "os::free_thread but osthread not set");
|
|
1518
|
|
1519
|
|
1520 // We are told to free resources of the argument thread,
|
|
1521 // but we can only really operate on the current thread.
|
|
1522 // The main thread must take the VMThread down synchronously
|
|
1523 // before the main thread exits and frees up CodeHeap
|
|
1524 guarantee((Thread::current()->osthread() == osthread
|
|
1525 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
|
|
1526 if (Thread::current()->osthread() == osthread) {
|
|
1527 // Restore caller's signal mask
|
|
1528 sigset_t sigmask = osthread->caller_sigmask();
|
|
1529 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
|
|
1530 }
|
|
1531 delete osthread;
|
|
1532 }
|
|
1533
|
|
1534 void os::pd_start_thread(Thread* thread) {
|
|
1535 int status = thr_continue(thread->osthread()->thread_id());
|
|
1536 assert_status(status == 0, status, "thr_continue failed");
|
|
1537 }
|
|
1538
|
|
1539
|
|
1540 intx os::current_thread_id() {
|
|
1541 return (intx)thr_self();
|
|
1542 }
|
|
1543
|
|
1544 static pid_t _initial_pid = 0;
|
|
1545
|
|
1546 int os::current_process_id() {
|
|
1547 return (int)(_initial_pid ? _initial_pid : getpid());
|
|
1548 }
|
|
1549
|
|
1550 int os::allocate_thread_local_storage() {
|
|
1551 // %%% in Win32 this allocates a memory segment pointed to by a
|
|
1552 // register. Dan Stein can implement a similar feature in
|
|
1553 // Solaris. Alternatively, the VM can do the same thing
|
|
1554 // explicitly: malloc some storage and keep the pointer in a
|
|
1555 // register (which is part of the thread's context) (or keep it
|
|
1556 // in TLS).
|
|
1557 // %%% In current versions of Solaris, thr_self and TSD can
|
|
1558 // be accessed via short sequences of displaced indirections.
|
|
1559 // The value of thr_self is available as %g7(36).
|
|
1560 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
|
|
1561 // assuming that the current thread already has a value bound to k.
|
|
1562 // It may be worth experimenting with such access patterns,
|
|
1563 // and later having the parameters formally exported from a Solaris
|
|
1564 // interface. I think, however, that it will be faster to
|
|
1565 // maintain the invariant that %g2 always contains the
|
|
1566 // JavaThread in Java code, and have stubs simply
|
|
1567 // treat %g2 as a caller-save register, preserving it in a %lN.
|
|
1568 thread_key_t tk;
|
|
1569 if (thr_keycreate( &tk, NULL ) )
|
|
1570 fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno));
|
|
1571 return int(tk);
|
|
1572 }
|
|
1573
|
|
1574 void os::free_thread_local_storage(int index) {
|
|
1575 // %%% don't think we need anything here
|
|
1576 // if ( pthread_key_delete((pthread_key_t) tk) )
|
|
1577 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
|
|
1578 }
|
|
1579
|
|
1580 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific
|
|
1581 // small number - point is NO swap space available
|
|
1582 void os::thread_local_storage_at_put(int index, void* value) {
|
|
1583 // %%% this is used only in threadLocalStorage.cpp
|
|
1584 if (thr_setspecific((thread_key_t)index, value)) {
|
|
1585 if (errno == ENOMEM) {
|
|
1586 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space");
|
|
1587 } else {
|
|
1588 fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno));
|
|
1589 }
|
|
1590 } else {
|
|
1591 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ;
|
|
1592 }
|
|
1593 }
|
|
1594
|
|
1595 // This function could be called before TLS is initialized, for example, when
|
|
1596 // VM receives an async signal or when VM causes a fatal error during
|
|
1597 // initialization. Return NULL if thr_getspecific() fails.
|
|
1598 void* os::thread_local_storage_at(int index) {
|
|
1599 // %%% this is used only in threadLocalStorage.cpp
|
|
1600 void* r = NULL;
|
|
1601 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
|
|
1602 }
|
|
1603
|
|
1604
|
|
1605 const int NANOSECS_PER_MILLISECS = 1000000;
|
|
1606 // gethrtime can move backwards if read from one cpu and then a different cpu
|
|
1607 // getTimeNanos is guaranteed to not move backward on Solaris
|
|
1608 // local spinloop created as faster for a CAS on an int than
|
|
1609 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not
|
|
1610 // supported on sparc v8 or pre supports_cx8 intel boxes.
|
|
1611 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong
|
|
1612 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes
|
|
1613 inline hrtime_t oldgetTimeNanos() {
|
|
1614 int gotlock = LOCK_INVALID;
|
|
1615 hrtime_t newtime = gethrtime();
|
|
1616
|
|
1617 for (;;) {
|
|
1618 // grab lock for max_hrtime
|
|
1619 int curlock = max_hrtime_lock;
|
|
1620 if (curlock & LOCK_BUSY) continue;
|
|
1621 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue;
|
|
1622 if (newtime > max_hrtime) {
|
|
1623 max_hrtime = newtime;
|
|
1624 } else {
|
|
1625 newtime = max_hrtime;
|
|
1626 }
|
|
1627 // release lock
|
|
1628 max_hrtime_lock = LOCK_FREE;
|
|
1629 return newtime;
|
|
1630 }
|
|
1631 }
|
|
1632 // gethrtime can move backwards if read from one cpu and then a different cpu
|
|
1633 // getTimeNanos is guaranteed to not move backward on Solaris
|
|
1634 inline hrtime_t getTimeNanos() {
|
|
1635 if (VM_Version::supports_cx8()) {
|
|
1636 bool retry = false;
|
|
1637 hrtime_t newtime = gethrtime();
|
|
1638 hrtime_t oldmaxtime = max_hrtime;
|
|
1639 hrtime_t retmaxtime = oldmaxtime;
|
|
1640 while ((newtime > retmaxtime) && (retry == false || retmaxtime != oldmaxtime)) {
|
|
1641 oldmaxtime = retmaxtime;
|
|
1642 retmaxtime = Atomic::cmpxchg(newtime, (volatile jlong *)&max_hrtime, oldmaxtime);
|
|
1643 retry = true;
|
|
1644 }
|
|
1645 return (newtime > retmaxtime) ? newtime : retmaxtime;
|
|
1646 } else {
|
|
1647 return oldgetTimeNanos();
|
|
1648 }
|
|
1649 }
|
|
1650
|
|
1651 // Time since start-up in seconds to a fine granularity.
|
|
1652 // Used by VMSelfDestructTimer and the MemProfiler.
|
|
1653 double os::elapsedTime() {
|
|
1654 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
|
|
1655 }
|
|
1656
|
|
1657 jlong os::elapsed_counter() {
|
|
1658 return (jlong)(getTimeNanos() - first_hrtime);
|
|
1659 }
|
|
1660
|
|
1661 jlong os::elapsed_frequency() {
|
|
1662 return hrtime_hz;
|
|
1663 }
|
|
1664
|
|
1665 // Return the real, user, and system times in seconds from an
|
|
1666 // arbitrary fixed point in the past.
|
|
1667 bool os::getTimesSecs(double* process_real_time,
|
|
1668 double* process_user_time,
|
|
1669 double* process_system_time) {
|
|
1670 struct tms ticks;
|
|
1671 clock_t real_ticks = times(&ticks);
|
|
1672
|
|
1673 if (real_ticks == (clock_t) (-1)) {
|
|
1674 return false;
|
|
1675 } else {
|
|
1676 double ticks_per_second = (double) clock_tics_per_sec;
|
|
1677 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
|
|
1678 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
|
|
1679 // For consistency return the real time from getTimeNanos()
|
|
1680 // converted to seconds.
|
|
1681 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
|
|
1682
|
|
1683 return true;
|
|
1684 }
|
|
1685 }
|
|
1686
|
|
1687 // Used internally for comparisons only
|
|
1688 // getTimeMillis guaranteed to not move backwards on Solaris
|
|
1689 jlong getTimeMillis() {
|
|
1690 jlong nanotime = getTimeNanos();
|
|
1691 return (jlong)(nanotime / NANOSECS_PER_MILLISECS);
|
|
1692 }
|
|
1693
|
|
1694 jlong os::timeofday() {
|
|
1695 timeval t;
|
|
1696 if (gettimeofday( &t, NULL) == -1)
|
|
1697 fatal1("timeofday: gettimeofday (%s)", strerror(errno));
|
|
1698 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
|
|
1699 }
|
|
1700
|
|
1701 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
|
|
1702 // _use_global_time is only set if CacheTimeMillis is true
|
|
1703 jlong os::javaTimeMillis() {
|
|
1704 return (_use_global_time ? read_global_time() : timeofday());
|
|
1705 }
|
|
1706
|
|
1707 jlong os::javaTimeNanos() {
|
|
1708 return (jlong)getTimeNanos();
|
|
1709 }
|
|
1710
|
|
1711 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
|
|
1712 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
|
|
1713 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
|
|
1714 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
|
|
1715 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
|
|
1716 }
|
|
1717
|
|
1718 char * os::local_time_string(char *buf, size_t buflen) {
|
|
1719 struct tm t;
|
|
1720 time_t long_time;
|
|
1721 time(&long_time);
|
|
1722 localtime_r(&long_time, &t);
|
|
1723 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
|
|
1724 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
|
|
1725 t.tm_hour, t.tm_min, t.tm_sec);
|
|
1726 return buf;
|
|
1727 }
|
|
1728
|
|
1729 // Note: os::shutdown() might be called very early during initialization, or
|
|
1730 // called from signal handler. Before adding something to os::shutdown(), make
|
|
1731 // sure it is async-safe and can handle partially initialized VM.
|
|
1732 void os::shutdown() {
|
|
1733
|
|
1734 // allow PerfMemory to attempt cleanup of any persistent resources
|
|
1735 perfMemory_exit();
|
|
1736
|
|
1737 // needs to remove object in file system
|
|
1738 AttachListener::abort();
|
|
1739
|
|
1740 // flush buffered output, finish log files
|
|
1741 ostream_abort();
|
|
1742
|
|
1743 // Check for abort hook
|
|
1744 abort_hook_t abort_hook = Arguments::abort_hook();
|
|
1745 if (abort_hook != NULL) {
|
|
1746 abort_hook();
|
|
1747 }
|
|
1748 }
|
|
1749
|
|
1750 // Note: os::abort() might be called very early during initialization, or
|
|
1751 // called from signal handler. Before adding something to os::abort(), make
|
|
1752 // sure it is async-safe and can handle partially initialized VM.
|
|
1753 void os::abort(bool dump_core) {
|
|
1754 os::shutdown();
|
|
1755 if (dump_core) {
|
|
1756 #ifndef PRODUCT
|
|
1757 fdStream out(defaultStream::output_fd());
|
|
1758 out.print_raw("Current thread is ");
|
|
1759 char buf[16];
|
|
1760 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
|
|
1761 out.print_raw_cr(buf);
|
|
1762 out.print_raw_cr("Dumping core ...");
|
|
1763 #endif
|
|
1764 ::abort(); // dump core (for debugging)
|
|
1765 }
|
|
1766
|
|
1767 ::exit(1);
|
|
1768 }
|
|
1769
|
|
1770 // Die immediately, no exit hook, no abort hook, no cleanup.
|
|
1771 void os::die() {
|
|
1772 _exit(-1);
|
|
1773 }
|
|
1774
|
|
1775 // unused
|
|
1776 void os::set_error_file(const char *logfile) {}
|
|
1777
|
|
1778 // DLL functions
|
|
1779
|
|
1780 const char* os::dll_file_extension() { return ".so"; }
|
|
1781
|
|
1782 const char* os::get_temp_directory() { return "/tmp/"; }
|
|
1783
|
|
1784 const char* os::get_current_directory(char *buf, int buflen) {
|
|
1785 return getcwd(buf, buflen);
|
|
1786 }
|
|
1787
|
|
1788 // check if addr is inside libjvm[_g].so
|
|
1789 bool os::address_is_in_vm(address addr) {
|
|
1790 static address libjvm_base_addr;
|
|
1791 Dl_info dlinfo;
|
|
1792
|
|
1793 if (libjvm_base_addr == NULL) {
|
|
1794 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo);
|
|
1795 libjvm_base_addr = (address)dlinfo.dli_fbase;
|
|
1796 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
|
|
1797 }
|
|
1798
|
|
1799 if (dladdr((void *)addr, &dlinfo)) {
|
|
1800 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
|
|
1801 }
|
|
1802
|
|
1803 return false;
|
|
1804 }
|
|
1805
|
|
1806 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int);
|
|
1807 static dladdr1_func_type dladdr1_func = NULL;
|
|
1808
|
|
1809 bool os::dll_address_to_function_name(address addr, char *buf,
|
|
1810 int buflen, int * offset) {
|
|
1811 Dl_info dlinfo;
|
|
1812
|
|
1813 // dladdr1_func was initialized in os::init()
|
|
1814 if (dladdr1_func){
|
|
1815 // yes, we have dladdr1
|
|
1816
|
|
1817 // Support for dladdr1 is checked at runtime; it may be
|
|
1818 // available even if the vm is built on a machine that does
|
|
1819 // not have dladdr1 support. Make sure there is a value for
|
|
1820 // RTLD_DL_SYMENT.
|
|
1821 #ifndef RTLD_DL_SYMENT
|
|
1822 #define RTLD_DL_SYMENT 1
|
|
1823 #endif
|
|
1824 Sym * info;
|
|
1825 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
|
|
1826 RTLD_DL_SYMENT)) {
|
|
1827 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
|
|
1828 if (offset) *offset = addr - (address)dlinfo.dli_saddr;
|
|
1829
|
|
1830 // check if the returned symbol really covers addr
|
|
1831 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr);
|
|
1832 } else {
|
|
1833 if (buf) buf[0] = '\0';
|
|
1834 if (offset) *offset = -1;
|
|
1835 return false;
|
|
1836 }
|
|
1837 } else {
|
|
1838 // no, only dladdr is available
|
|
1839 if(dladdr((void *)addr, &dlinfo)) {
|
|
1840 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname);
|
|
1841 if (offset) *offset = addr - (address)dlinfo.dli_saddr;
|
|
1842 return true;
|
|
1843 } else {
|
|
1844 if (buf) buf[0] = '\0';
|
|
1845 if (offset) *offset = -1;
|
|
1846 return false;
|
|
1847 }
|
|
1848 }
|
|
1849 }
|
|
1850
|
|
1851 bool os::dll_address_to_library_name(address addr, char* buf,
|
|
1852 int buflen, int* offset) {
|
|
1853 Dl_info dlinfo;
|
|
1854
|
|
1855 if (dladdr((void*)addr, &dlinfo)){
|
|
1856 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
|
|
1857 if (offset) *offset = addr - (address)dlinfo.dli_fbase;
|
|
1858 return true;
|
|
1859 } else {
|
|
1860 if (buf) buf[0] = '\0';
|
|
1861 if (offset) *offset = -1;
|
|
1862 return false;
|
|
1863 }
|
|
1864 }
|
|
1865
|
|
1866 // Prints the names and full paths of all opened dynamic libraries
|
|
1867 // for current process
|
|
1868 void os::print_dll_info(outputStream * st) {
|
|
1869 Dl_info dli;
|
|
1870 void *handle;
|
|
1871 Link_map *map;
|
|
1872 Link_map *p;
|
|
1873
|
|
1874 st->print_cr("Dynamic libraries:"); st->flush();
|
|
1875
|
|
1876 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) {
|
|
1877 st->print_cr("Error: Cannot print dynamic libraries.");
|
|
1878 return;
|
|
1879 }
|
|
1880 handle = dlopen(dli.dli_fname, RTLD_LAZY);
|
|
1881 if (handle == NULL) {
|
|
1882 st->print_cr("Error: Cannot print dynamic libraries.");
|
|
1883 return;
|
|
1884 }
|
|
1885 dlinfo(handle, RTLD_DI_LINKMAP, &map);
|
|
1886 if (map == NULL) {
|
|
1887 st->print_cr("Error: Cannot print dynamic libraries.");
|
|
1888 return;
|
|
1889 }
|
|
1890
|
|
1891 while (map->l_prev != NULL)
|
|
1892 map = map->l_prev;
|
|
1893
|
|
1894 while (map != NULL) {
|
|
1895 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
|
|
1896 map = map->l_next;
|
|
1897 }
|
|
1898
|
|
1899 dlclose(handle);
|
|
1900 }
|
|
1901
|
|
1902 // Loads .dll/.so and
|
|
1903 // in case of error it checks if .dll/.so was built for the
|
|
1904 // same architecture as Hotspot is running on
|
|
1905
|
|
1906 void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
|
|
1907 {
|
|
1908 void * result= ::dlopen(filename, RTLD_LAZY);
|
|
1909 if (result != NULL) {
|
|
1910 // Successful loading
|
|
1911 return result;
|
|
1912 }
|
|
1913
|
|
1914 Elf32_Ehdr elf_head;
|
|
1915
|
|
1916 // Read system error message into ebuf
|
|
1917 // It may or may not be overwritten below
|
|
1918 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
|
|
1919 ebuf[ebuflen-1]='\0';
|
|
1920 int diag_msg_max_length=ebuflen-strlen(ebuf);
|
|
1921 char* diag_msg_buf=ebuf+strlen(ebuf);
|
|
1922
|
|
1923 if (diag_msg_max_length==0) {
|
|
1924 // No more space in ebuf for additional diagnostics message
|
|
1925 return NULL;
|
|
1926 }
|
|
1927
|
|
1928
|
|
1929 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
|
|
1930
|
|
1931 if (file_descriptor < 0) {
|
|
1932 // Can't open library, report dlerror() message
|
|
1933 return NULL;
|
|
1934 }
|
|
1935
|
|
1936 bool failed_to_read_elf_head=
|
|
1937 (sizeof(elf_head)!=
|
|
1938 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ;
|
|
1939
|
|
1940 ::close(file_descriptor);
|
|
1941 if (failed_to_read_elf_head) {
|
|
1942 // file i/o error - report dlerror() msg
|
|
1943 return NULL;
|
|
1944 }
|
|
1945
|
|
1946 typedef struct {
|
|
1947 Elf32_Half code; // Actual value as defined in elf.h
|
|
1948 Elf32_Half compat_class; // Compatibility of archs at VM's sense
|
|
1949 char elf_class; // 32 or 64 bit
|
|
1950 char endianess; // MSB or LSB
|
|
1951 char* name; // String representation
|
|
1952 } arch_t;
|
|
1953
|
|
1954 static const arch_t arch_array[]={
|
|
1955 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
|
|
1956 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
|
|
1957 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
|
|
1958 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
|
|
1959 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
|
|
1960 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
|
|
1961 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
|
|
1962 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
|
|
1963 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}
|
|
1964 };
|
|
1965
|
|
1966 #if (defined IA32)
|
|
1967 static Elf32_Half running_arch_code=EM_386;
|
|
1968 #elif (defined AMD64)
|
|
1969 static Elf32_Half running_arch_code=EM_X86_64;
|
|
1970 #elif (defined IA64)
|
|
1971 static Elf32_Half running_arch_code=EM_IA_64;
|
|
1972 #elif (defined __sparc) && (defined _LP64)
|
|
1973 static Elf32_Half running_arch_code=EM_SPARCV9;
|
|
1974 #elif (defined __sparc) && (!defined _LP64)
|
|
1975 static Elf32_Half running_arch_code=EM_SPARC;
|
|
1976 #elif (defined __powerpc64__)
|
|
1977 static Elf32_Half running_arch_code=EM_PPC64;
|
|
1978 #elif (defined __powerpc__)
|
|
1979 static Elf32_Half running_arch_code=EM_PPC;
|
|
1980 #else
|
|
1981 #error Method os::dll_load requires that one of following is defined:\
|
|
1982 IA32, AMD64, IA64, __sparc, __powerpc__
|
|
1983 #endif
|
|
1984
|
|
1985 // Identify compatability class for VM's architecture and library's architecture
|
|
1986 // Obtain string descriptions for architectures
|
|
1987
|
|
1988 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
|
|
1989 int running_arch_index=-1;
|
|
1990
|
|
1991 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) {
|
|
1992 if (running_arch_code == arch_array[i].code) {
|
|
1993 running_arch_index = i;
|
|
1994 }
|
|
1995 if (lib_arch.code == arch_array[i].code) {
|
|
1996 lib_arch.compat_class = arch_array[i].compat_class;
|
|
1997 lib_arch.name = arch_array[i].name;
|
|
1998 }
|
|
1999 }
|
|
2000
|
|
2001 assert(running_arch_index != -1,
|
|
2002 "Didn't find running architecture code (running_arch_code) in arch_array");
|
|
2003 if (running_arch_index == -1) {
|
|
2004 // Even though running architecture detection failed
|
|
2005 // we may still continue with reporting dlerror() message
|
|
2006 return NULL;
|
|
2007 }
|
|
2008
|
|
2009 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
|
|
2010 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
|
|
2011 return NULL;
|
|
2012 }
|
|
2013
|
|
2014 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
|
|
2015 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
|
|
2016 return NULL;
|
|
2017 }
|
|
2018
|
|
2019 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
|
|
2020 if ( lib_arch.name!=NULL ) {
|
|
2021 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
|
|
2022 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
|
|
2023 lib_arch.name, arch_array[running_arch_index].name);
|
|
2024 } else {
|
|
2025 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
|
|
2026 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
|
|
2027 lib_arch.code,
|
|
2028 arch_array[running_arch_index].name);
|
|
2029 }
|
|
2030 }
|
|
2031
|
|
2032 return NULL;
|
|
2033 }
|
|
2034
|
|
2035
|
|
2036
|
|
2037 bool _print_ascii_file(const char* filename, outputStream* st) {
|
|
2038 int fd = open(filename, O_RDONLY);
|
|
2039 if (fd == -1) {
|
|
2040 return false;
|
|
2041 }
|
|
2042
|
|
2043 char buf[32];
|
|
2044 int bytes;
|
|
2045 while ((bytes = read(fd, buf, sizeof(buf))) > 0) {
|
|
2046 st->print_raw(buf, bytes);
|
|
2047 }
|
|
2048
|
|
2049 close(fd);
|
|
2050
|
|
2051 return true;
|
|
2052 }
|
|
2053
|
|
2054 void os::print_os_info(outputStream* st) {
|
|
2055 st->print("OS:");
|
|
2056
|
|
2057 if (!_print_ascii_file("/etc/release", st)) {
|
|
2058 st->print("Solaris");
|
|
2059 }
|
|
2060 st->cr();
|
|
2061
|
|
2062 // kernel
|
|
2063 st->print("uname:");
|
|
2064 struct utsname name;
|
|
2065 uname(&name);
|
|
2066 st->print(name.sysname); st->print(" ");
|
|
2067 st->print(name.release); st->print(" ");
|
|
2068 st->print(name.version); st->print(" ");
|
|
2069 st->print(name.machine);
|
|
2070
|
|
2071 // libthread
|
|
2072 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)");
|
|
2073 else st->print(" (T1 libthread)");
|
|
2074 st->cr();
|
|
2075
|
|
2076 // rlimit
|
|
2077 st->print("rlimit:");
|
|
2078 struct rlimit rlim;
|
|
2079
|
|
2080 st->print(" STACK ");
|
|
2081 getrlimit(RLIMIT_STACK, &rlim);
|
|
2082 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
|
|
2083 else st->print("%uk", rlim.rlim_cur >> 10);
|
|
2084
|
|
2085 st->print(", CORE ");
|
|
2086 getrlimit(RLIMIT_CORE, &rlim);
|
|
2087 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
|
|
2088 else st->print("%uk", rlim.rlim_cur >> 10);
|
|
2089
|
|
2090 st->print(", NOFILE ");
|
|
2091 getrlimit(RLIMIT_NOFILE, &rlim);
|
|
2092 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
|
|
2093 else st->print("%d", rlim.rlim_cur);
|
|
2094
|
|
2095 st->print(", AS ");
|
|
2096 getrlimit(RLIMIT_AS, &rlim);
|
|
2097 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
|
|
2098 else st->print("%uk", rlim.rlim_cur >> 10);
|
|
2099 st->cr();
|
|
2100
|
|
2101 // load average
|
|
2102 st->print("load average:");
|
|
2103 double loadavg[3];
|
|
2104 os::loadavg(loadavg, 3);
|
|
2105 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]);
|
|
2106 st->cr();
|
|
2107 }
|
|
2108
|
|
2109
|
|
2110 static bool check_addr0(outputStream* st) {
|
|
2111 jboolean status = false;
|
|
2112 int fd = open("/proc/self/map",O_RDONLY);
|
|
2113 if (fd >= 0) {
|
|
2114 prmap_t p;
|
|
2115 while(read(fd, &p, sizeof(p)) > 0) {
|
|
2116 if (p.pr_vaddr == 0x0) {
|
|
2117 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
|
|
2118 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
|
|
2119 st->print("Access:");
|
|
2120 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
|
|
2121 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
|
|
2122 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
|
|
2123 st->cr();
|
|
2124 status = true;
|
|
2125 }
|
|
2126 close(fd);
|
|
2127 }
|
|
2128 }
|
|
2129 return status;
|
|
2130 }
|
|
2131
|
|
2132 void os::print_memory_info(outputStream* st) {
|
|
2133 st->print("Memory:");
|
|
2134 st->print(" %dk page", os::vm_page_size()>>10);
|
|
2135 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
|
|
2136 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
|
|
2137 st->cr();
|
|
2138 (void) check_addr0(st);
|
|
2139 }
|
|
2140
|
|
2141 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific
|
|
2142 // but they're the same for all the solaris architectures that we support.
|
|
2143 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR",
|
|
2144 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG",
|
|
2145 "ILL_COPROC", "ILL_BADSTK" };
|
|
2146
|
|
2147 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV",
|
|
2148 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES",
|
|
2149 "FPE_FLTINV", "FPE_FLTSUB" };
|
|
2150
|
|
2151 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" };
|
|
2152
|
|
2153 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" };
|
|
2154
|
|
2155 void os::print_siginfo(outputStream* st, void* siginfo) {
|
|
2156 st->print("siginfo:");
|
|
2157
|
|
2158 const int buflen = 100;
|
|
2159 char buf[buflen];
|
|
2160 siginfo_t *si = (siginfo_t*)siginfo;
|
|
2161 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen));
|
|
2162 char *err = strerror(si->si_errno);
|
|
2163 if (si->si_errno != 0 && err != NULL) {
|
|
2164 st->print("si_errno=%s", err);
|
|
2165 } else {
|
|
2166 st->print("si_errno=%d", si->si_errno);
|
|
2167 }
|
|
2168 const int c = si->si_code;
|
|
2169 assert(c > 0, "unexpected si_code");
|
|
2170 switch (si->si_signo) {
|
|
2171 case SIGILL:
|
|
2172 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]);
|
|
2173 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
|
|
2174 break;
|
|
2175 case SIGFPE:
|
|
2176 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]);
|
|
2177 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
|
|
2178 break;
|
|
2179 case SIGSEGV:
|
|
2180 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]);
|
|
2181 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
|
|
2182 break;
|
|
2183 case SIGBUS:
|
|
2184 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]);
|
|
2185 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
|
|
2186 break;
|
|
2187 default:
|
|
2188 st->print(", si_code=%d", si->si_code);
|
|
2189 // no si_addr
|
|
2190 }
|
|
2191
|
|
2192 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
|
|
2193 UseSharedSpaces) {
|
|
2194 FileMapInfo* mapinfo = FileMapInfo::current_info();
|
|
2195 if (mapinfo->is_in_shared_space(si->si_addr)) {
|
|
2196 st->print("\n\nError accessing class data sharing archive." \
|
|
2197 " Mapped file inaccessible during execution, " \
|
|
2198 " possible disk/network problem.");
|
|
2199 }
|
|
2200 }
|
|
2201 st->cr();
|
|
2202 }
|
|
2203
|
|
2204 // Moved from whole group, because we need them here for diagnostic
|
|
2205 // prints.
|
|
2206 #define OLDMAXSIGNUM 32
|
|
2207 static int Maxsignum = 0;
|
|
2208 static int *ourSigFlags = NULL;
|
|
2209
|
|
2210 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
|
|
2211
|
|
2212 int os::Solaris::get_our_sigflags(int sig) {
|
|
2213 assert(ourSigFlags!=NULL, "signal data structure not initialized");
|
|
2214 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
|
|
2215 return ourSigFlags[sig];
|
|
2216 }
|
|
2217
|
|
2218 void os::Solaris::set_our_sigflags(int sig, int flags) {
|
|
2219 assert(ourSigFlags!=NULL, "signal data structure not initialized");
|
|
2220 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
|
|
2221 ourSigFlags[sig] = flags;
|
|
2222 }
|
|
2223
|
|
2224
|
|
2225 static const char* get_signal_handler_name(address handler,
|
|
2226 char* buf, int buflen) {
|
|
2227 int offset;
|
|
2228 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
|
|
2229 if (found) {
|
|
2230 // skip directory names
|
|
2231 const char *p1, *p2;
|
|
2232 p1 = buf;
|
|
2233 size_t len = strlen(os::file_separator());
|
|
2234 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
|
|
2235 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
|
|
2236 } else {
|
|
2237 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
|
|
2238 }
|
|
2239 return buf;
|
|
2240 }
|
|
2241
|
|
2242 static void print_signal_handler(outputStream* st, int sig,
|
|
2243 char* buf, size_t buflen) {
|
|
2244 struct sigaction sa;
|
|
2245
|
|
2246 sigaction(sig, NULL, &sa);
|
|
2247
|
|
2248 st->print("%s: ", os::exception_name(sig, buf, buflen));
|
|
2249
|
|
2250 address handler = (sa.sa_flags & SA_SIGINFO)
|
|
2251 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
|
|
2252 : CAST_FROM_FN_PTR(address, sa.sa_handler);
|
|
2253
|
|
2254 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
|
|
2255 st->print("SIG_DFL");
|
|
2256 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
|
|
2257 st->print("SIG_IGN");
|
|
2258 } else {
|
|
2259 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
|
|
2260 }
|
|
2261
|
|
2262 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask);
|
|
2263
|
|
2264 address rh = VMError::get_resetted_sighandler(sig);
|
|
2265 // May be, handler was resetted by VMError?
|
|
2266 if(rh != NULL) {
|
|
2267 handler = rh;
|
|
2268 sa.sa_flags = VMError::get_resetted_sigflags(sig);
|
|
2269 }
|
|
2270
|
|
2271 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags);
|
|
2272
|
|
2273 // Check: is it our handler?
|
|
2274 if(handler == CAST_FROM_FN_PTR(address, signalHandler) ||
|
|
2275 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
|
|
2276 // It is our signal handler
|
|
2277 // check for flags
|
|
2278 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
|
|
2279 st->print(
|
|
2280 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
|
|
2281 os::Solaris::get_our_sigflags(sig));
|
|
2282 }
|
|
2283 }
|
|
2284 st->cr();
|
|
2285 }
|
|
2286
|
|
2287 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
|
|
2288 st->print_cr("Signal Handlers:");
|
|
2289 print_signal_handler(st, SIGSEGV, buf, buflen);
|
|
2290 print_signal_handler(st, SIGBUS , buf, buflen);
|
|
2291 print_signal_handler(st, SIGFPE , buf, buflen);
|
|
2292 print_signal_handler(st, SIGPIPE, buf, buflen);
|
|
2293 print_signal_handler(st, SIGXFSZ, buf, buflen);
|
|
2294 print_signal_handler(st, SIGILL , buf, buflen);
|
|
2295 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
|
|
2296 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
|
|
2297 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
|
|
2298 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
|
|
2299 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
|
|
2300 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
|
|
2301 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
|
|
2302 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
|
|
2303 }
|
|
2304
|
|
2305 static char saved_jvm_path[MAXPATHLEN] = { 0 };
|
|
2306
|
|
2307 // Find the full path to the current module, libjvm.so or libjvm_g.so
|
|
2308 void os::jvm_path(char *buf, jint buflen) {
|
|
2309 // Error checking.
|
|
2310 if (buflen < MAXPATHLEN) {
|
|
2311 assert(false, "must use a large-enough buffer");
|
|
2312 buf[0] = '\0';
|
|
2313 return;
|
|
2314 }
|
|
2315 // Lazy resolve the path to current module.
|
|
2316 if (saved_jvm_path[0] != 0) {
|
|
2317 strcpy(buf, saved_jvm_path);
|
|
2318 return;
|
|
2319 }
|
|
2320
|
|
2321 Dl_info dlinfo;
|
|
2322 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
|
|
2323 assert(ret != 0, "cannot locate libjvm");
|
|
2324 realpath((char *)dlinfo.dli_fname, buf);
|
|
2325
|
|
2326 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) {
|
|
2327 // Support for the gamma launcher. Typical value for buf is
|
|
2328 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at
|
|
2329 // the right place in the string, then assume we are installed in a JDK and
|
|
2330 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix
|
|
2331 // up the path so it looks like libjvm.so is installed there (append a
|
|
2332 // fake suffix hotspot/libjvm.so).
|
|
2333 const char *p = buf + strlen(buf) - 1;
|
|
2334 for (int count = 0; p > buf && count < 5; ++count) {
|
|
2335 for (--p; p > buf && *p != '/'; --p)
|
|
2336 /* empty */ ;
|
|
2337 }
|
|
2338
|
|
2339 if (strncmp(p, "/jre/lib/", 9) != 0) {
|
|
2340 // Look for JAVA_HOME in the environment.
|
|
2341 char* java_home_var = ::getenv("JAVA_HOME");
|
|
2342 if (java_home_var != NULL && java_home_var[0] != 0) {
|
|
2343 char cpu_arch[12];
|
|
2344 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
|
|
2345 #ifdef _LP64
|
|
2346 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
|
|
2347 if (strcmp(cpu_arch, "sparc") == 0) {
|
|
2348 strcat(cpu_arch, "v9");
|
|
2349 } else if (strcmp(cpu_arch, "i386") == 0) {
|
|
2350 strcpy(cpu_arch, "amd64");
|
|
2351 }
|
|
2352 #endif
|
|
2353 // Check the current module name "libjvm.so" or "libjvm_g.so".
|
|
2354 p = strrchr(buf, '/');
|
|
2355 assert(strstr(p, "/libjvm") == p, "invalid library name");
|
|
2356 p = strstr(p, "_g") ? "_g" : "";
|
|
2357
|
|
2358 realpath(java_home_var, buf);
|
|
2359 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch);
|
|
2360 if (0 == access(buf, F_OK)) {
|
|
2361 // Use current module name "libjvm[_g].so" instead of
|
|
2362 // "libjvm"debug_only("_g")".so" since for fastdebug version
|
|
2363 // we should have "libjvm.so" but debug_only("_g") adds "_g"!
|
|
2364 // It is used when we are choosing the HPI library's name
|
|
2365 // "libhpi[_g].so" in hpi::initialize_get_interface().
|
|
2366 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p);
|
|
2367 } else {
|
|
2368 // Go back to path of .so
|
|
2369 realpath((char *)dlinfo.dli_fname, buf);
|
|
2370 }
|
|
2371 }
|
|
2372 }
|
|
2373 }
|
|
2374
|
|
2375 strcpy(saved_jvm_path, buf);
|
|
2376 }
|
|
2377
|
|
2378
|
|
2379 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
|
|
2380 // no prefix required, not even "_"
|
|
2381 }
|
|
2382
|
|
2383
|
|
2384 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
|
|
2385 // no suffix required
|
|
2386 }
|
|
2387
|
|
2388
|
|
2389 // sun.misc.Signal
|
|
2390
|
|
2391 extern "C" {
|
|
2392 static void UserHandler(int sig, void *siginfo, void *context) {
|
|
2393 // Ctrl-C is pressed during error reporting, likely because the error
|
|
2394 // handler fails to abort. Let VM die immediately.
|
|
2395 if (sig == SIGINT && is_error_reported()) {
|
|
2396 os::die();
|
|
2397 }
|
|
2398
|
|
2399 os::signal_notify(sig);
|
|
2400 // We do not need to reinstate the signal handler each time...
|
|
2401 }
|
|
2402 }
|
|
2403
|
|
2404 void* os::user_handler() {
|
|
2405 return CAST_FROM_FN_PTR(void*, UserHandler);
|
|
2406 }
|
|
2407
|
|
2408 extern "C" {
|
|
2409 typedef void (*sa_handler_t)(int);
|
|
2410 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
|
|
2411 }
|
|
2412
|
|
2413 void* os::signal(int signal_number, void* handler) {
|
|
2414 struct sigaction sigAct, oldSigAct;
|
|
2415 sigfillset(&(sigAct.sa_mask));
|
|
2416 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
|
|
2417 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
|
|
2418
|
|
2419 if (sigaction(signal_number, &sigAct, &oldSigAct))
|
|
2420 // -1 means registration failed
|
|
2421 return (void *)-1;
|
|
2422
|
|
2423 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
|
|
2424 }
|
|
2425
|
|
2426 void os::signal_raise(int signal_number) {
|
|
2427 raise(signal_number);
|
|
2428 }
|
|
2429
|
|
2430 /*
|
|
2431 * The following code is moved from os.cpp for making this
|
|
2432 * code platform specific, which it is by its very nature.
|
|
2433 */
|
|
2434
|
|
2435 // a counter for each possible signal value
|
|
2436 static int Sigexit = 0;
|
|
2437 static int Maxlibjsigsigs;
|
|
2438 static jint *pending_signals = NULL;
|
|
2439 static int *preinstalled_sigs = NULL;
|
|
2440 static struct sigaction *chainedsigactions = NULL;
|
|
2441 static sema_t sig_sem;
|
|
2442 typedef int (*version_getting_t)();
|
|
2443 version_getting_t os::Solaris::get_libjsig_version = NULL;
|
|
2444 static int libjsigversion = NULL;
|
|
2445
|
|
2446 int os::sigexitnum_pd() {
|
|
2447 assert(Sigexit > 0, "signal memory not yet initialized");
|
|
2448 return Sigexit;
|
|
2449 }
|
|
2450
|
|
2451 void os::Solaris::init_signal_mem() {
|
|
2452 // Initialize signal structures
|
|
2453 Maxsignum = SIGRTMAX;
|
|
2454 Sigexit = Maxsignum+1;
|
|
2455 assert(Maxsignum >0, "Unable to obtain max signal number");
|
|
2456
|
|
2457 Maxlibjsigsigs = Maxsignum;
|
|
2458
|
|
2459 // pending_signals has one int per signal
|
|
2460 // The additional signal is for SIGEXIT - exit signal to signal_thread
|
|
2461 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1));
|
|
2462 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
|
|
2463
|
|
2464 if (UseSignalChaining) {
|
|
2465 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
|
|
2466 * (Maxsignum + 1));
|
|
2467 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
|
|
2468 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1));
|
|
2469 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
|
|
2470 }
|
|
2471 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ));
|
|
2472 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
|
|
2473 }
|
|
2474
|
|
2475 void os::signal_init_pd() {
|
|
2476 int ret;
|
|
2477
|
|
2478 ret = ::sema_init(&sig_sem, 0, NULL, NULL);
|
|
2479 assert(ret == 0, "sema_init() failed");
|
|
2480 }
|
|
2481
|
|
2482 void os::signal_notify(int signal_number) {
|
|
2483 int ret;
|
|
2484
|
|
2485 Atomic::inc(&pending_signals[signal_number]);
|
|
2486 ret = ::sema_post(&sig_sem);
|
|
2487 assert(ret == 0, "sema_post() failed");
|
|
2488 }
|
|
2489
|
|
2490 static int check_pending_signals(bool wait_for_signal) {
|
|
2491 int ret;
|
|
2492 while (true) {
|
|
2493 for (int i = 0; i < Sigexit + 1; i++) {
|
|
2494 jint n = pending_signals[i];
|
|
2495 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
|
|
2496 return i;
|
|
2497 }
|
|
2498 }
|
|
2499 if (!wait_for_signal) {
|
|
2500 return -1;
|
|
2501 }
|
|
2502 JavaThread *thread = JavaThread::current();
|
|
2503 ThreadBlockInVM tbivm(thread);
|
|
2504
|
|
2505 bool threadIsSuspended;
|
|
2506 do {
|
|
2507 thread->set_suspend_equivalent();
|
|
2508 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
|
|
2509 while((ret = ::sema_wait(&sig_sem)) == EINTR)
|
|
2510 ;
|
|
2511 assert(ret == 0, "sema_wait() failed");
|
|
2512
|
|
2513 // were we externally suspended while we were waiting?
|
|
2514 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
|
|
2515 if (threadIsSuspended) {
|
|
2516 //
|
|
2517 // The semaphore has been incremented, but while we were waiting
|
|
2518 // another thread suspended us. We don't want to continue running
|
|
2519 // while suspended because that would surprise the thread that
|
|
2520 // suspended us.
|
|
2521 //
|
|
2522 ret = ::sema_post(&sig_sem);
|
|
2523 assert(ret == 0, "sema_post() failed");
|
|
2524
|
|
2525 thread->java_suspend_self();
|
|
2526 }
|
|
2527 } while (threadIsSuspended);
|
|
2528 }
|
|
2529 }
|
|
2530
|
|
2531 int os::signal_lookup() {
|
|
2532 return check_pending_signals(false);
|
|
2533 }
|
|
2534
|
|
2535 int os::signal_wait() {
|
|
2536 return check_pending_signals(true);
|
|
2537 }
|
|
2538
|
|
2539 ////////////////////////////////////////////////////////////////////////////////
|
|
2540 // Virtual Memory
|
|
2541
|
|
2542 static int page_size = -1;
|
|
2543
|
|
2544 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
|
|
2545 // clear this var if support is not available.
|
|
2546 static bool has_map_align = true;
|
|
2547
|
|
2548 int os::vm_page_size() {
|
|
2549 assert(page_size != -1, "must call os::init");
|
|
2550 return page_size;
|
|
2551 }
|
|
2552
|
|
2553 // Solaris allocates memory by pages.
|
|
2554 int os::vm_allocation_granularity() {
|
|
2555 assert(page_size != -1, "must call os::init");
|
|
2556 return page_size;
|
|
2557 }
|
|
2558
|
|
2559 bool os::commit_memory(char* addr, size_t bytes) {
|
|
2560 size_t size = bytes;
|
|
2561 return
|
|
2562 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED,
|
|
2563 PROT_READ | PROT_WRITE | PROT_EXEC);
|
|
2564 }
|
|
2565
|
|
2566 bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) {
|
|
2567 if (commit_memory(addr, bytes)) {
|
|
2568 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) {
|
|
2569 // If the large page size has been set and the VM
|
|
2570 // is using large pages, use the large page size
|
|
2571 // if it is smaller than the alignment hint. This is
|
|
2572 // a case where the VM wants to use a larger alignment size
|
|
2573 // for its own reasons but still want to use large pages
|
|
2574 // (which is what matters to setting the mpss range.
|
|
2575 size_t page_size = 0;
|
|
2576 if (large_page_size() < alignment_hint) {
|
|
2577 assert(UseLargePages, "Expected to be here for large page use only");
|
|
2578 page_size = large_page_size();
|
|
2579 } else {
|
|
2580 // If the alignment hint is less than the large page
|
|
2581 // size, the VM wants a particular alignment (thus the hint)
|
|
2582 // for internal reasons. Try to set the mpss range using
|
|
2583 // the alignment_hint.
|
|
2584 page_size = alignment_hint;
|
|
2585 }
|
|
2586 // Since this is a hint, ignore any failures.
|
|
2587 (void)Solaris::set_mpss_range(addr, bytes, page_size);
|
|
2588 }
|
|
2589 return true;
|
|
2590 }
|
|
2591 return false;
|
|
2592 }
|
|
2593
|
|
2594 // Uncommit the pages in a specified region.
|
|
2595 void os::free_memory(char* addr, size_t bytes) {
|
|
2596 if (madvise(addr, bytes, MADV_FREE) < 0) {
|
|
2597 debug_only(warning("MADV_FREE failed."));
|
|
2598 return;
|
|
2599 }
|
|
2600 }
|
|
2601
|
|
2602 // Change the page size in a given range.
|
|
2603 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
|
|
2604 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
|
|
2605 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
|
|
2606 Solaris::set_mpss_range(addr, bytes, alignment_hint);
|
|
2607 }
|
|
2608
|
|
2609 // Tell the OS to make the range local to the first-touching LWP
|
|
2610 void os::numa_make_local(char *addr, size_t bytes) {
|
|
2611 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
|
|
2612 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
|
|
2613 debug_only(warning("MADV_ACCESS_LWP failed."));
|
|
2614 }
|
|
2615 }
|
|
2616
|
|
2617 // Tell the OS that this range would be accessed from different LWPs.
|
|
2618 void os::numa_make_global(char *addr, size_t bytes) {
|
|
2619 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
|
|
2620 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
|
|
2621 debug_only(warning("MADV_ACCESS_MANY failed."));
|
|
2622 }
|
|
2623 }
|
|
2624
|
|
2625 // Get the number of the locality groups.
|
|
2626 size_t os::numa_get_groups_num() {
|
|
2627 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
|
|
2628 return n != -1 ? n : 1;
|
|
2629 }
|
|
2630
|
|
2631 // Get a list of leaf locality groups. A leaf lgroup is group that
|
|
2632 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
|
|
2633 // board. An LWP is assigned to one of these groups upon creation.
|
|
2634 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
|
|
2635 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
|
|
2636 ids[0] = 0;
|
|
2637 return 1;
|
|
2638 }
|
|
2639 int result_size = 0, top = 1, bottom = 0, cur = 0;
|
|
2640 for (int k = 0; k < size; k++) {
|
|
2641 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
|
|
2642 (Solaris::lgrp_id_t*)&ids[top], size - top);
|
|
2643 if (r == -1) {
|
|
2644 ids[0] = 0;
|
|
2645 return 1;
|
|
2646 }
|
|
2647 if (!r) {
|
|
2648 assert (bottom <= cur, "Sanity check");
|
|
2649 ids[bottom++] = ids[cur];
|
|
2650 }
|
|
2651 top += r;
|
|
2652 cur++;
|
|
2653 }
|
|
2654 return bottom;
|
|
2655 }
|
|
2656
|
|
2657 // Detect the topology change. Typically happens during CPU pluggin-unplugging.
|
|
2658 bool os::numa_topology_changed() {
|
|
2659 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
|
|
2660 if (is_stale != -1 && is_stale) {
|
|
2661 Solaris::lgrp_fini(Solaris::lgrp_cookie());
|
|
2662 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
|
|
2663 assert(c != 0, "Failure to initialize LGRP API");
|
|
2664 Solaris::set_lgrp_cookie(c);
|
|
2665 return true;
|
|
2666 }
|
|
2667 return false;
|
|
2668 }
|
|
2669
|
|
2670 // Get the group id of the current LWP.
|
|
2671 int os::numa_get_group_id() {
|
|
2672 int lgrp_id = os::Solaris::lgrp_home(P_LWPID, P_MYID);
|
|
2673 if (lgrp_id == -1) {
|
|
2674 return 0;
|
|
2675 }
|
|
2676 return lgrp_id;
|
|
2677 }
|
|
2678
|
|
2679 // Request information about the page.
|
|
2680 bool os::get_page_info(char *start, page_info* info) {
|
|
2681 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
|
|
2682 uint64_t addr = (uintptr_t)start;
|
|
2683 uint64_t outdata[2];
|
|
2684 uint_t validity = 0;
|
|
2685
|
|
2686 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
|
|
2687 return false;
|
|
2688 }
|
|
2689
|
|
2690 info->size = 0;
|
|
2691 info->lgrp_id = -1;
|
|
2692
|
|
2693 if ((validity & 1) != 0) {
|
|
2694 if ((validity & 2) != 0) {
|
|
2695 info->lgrp_id = outdata[0];
|
|
2696 }
|
|
2697 if ((validity & 4) != 0) {
|
|
2698 info->size = outdata[1];
|
|
2699 }
|
|
2700 return true;
|
|
2701 }
|
|
2702 return false;
|
|
2703 }
|
|
2704
|
|
2705 // Scan the pages from start to end until a page different than
|
|
2706 // the one described in the info parameter is encountered.
|
|
2707 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
|
|
2708 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
|
|
2709 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
|
|
2710 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT];
|
|
2711 uint_t validity[MAX_MEMINFO_CNT];
|
|
2712
|
|
2713 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
|
|
2714 uint64_t p = (uint64_t)start;
|
|
2715 while (p < (uint64_t)end) {
|
|
2716 addrs[0] = p;
|
|
2717 size_t addrs_count = 1;
|
|
2718 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) {
|
|
2719 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
|
|
2720 addrs_count++;
|
|
2721 }
|
|
2722
|
|
2723 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
|
|
2724 return NULL;
|
|
2725 }
|
|
2726
|
|
2727 size_t i = 0;
|
|
2728 for (; i < addrs_count; i++) {
|
|
2729 if ((validity[i] & 1) != 0) {
|
|
2730 if ((validity[i] & 4) != 0) {
|
|
2731 if (outdata[types * i + 1] != page_expected->size) {
|
|
2732 break;
|
|
2733 }
|
|
2734 } else
|
|
2735 if (page_expected->size != 0) {
|
|
2736 break;
|
|
2737 }
|
|
2738
|
|
2739 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
|
|
2740 if (outdata[types * i] != page_expected->lgrp_id) {
|
|
2741 break;
|
|
2742 }
|
|
2743 }
|
|
2744 } else {
|
|
2745 return NULL;
|
|
2746 }
|
|
2747 }
|
|
2748
|
|
2749 if (i != addrs_count) {
|
|
2750 if ((validity[i] & 2) != 0) {
|
|
2751 page_found->lgrp_id = outdata[types * i];
|
|
2752 } else {
|
|
2753 page_found->lgrp_id = -1;
|
|
2754 }
|
|
2755 if ((validity[i] & 4) != 0) {
|
|
2756 page_found->size = outdata[types * i + 1];
|
|
2757 } else {
|
|
2758 page_found->size = 0;
|
|
2759 }
|
|
2760 return (char*)addrs[i];
|
|
2761 }
|
|
2762
|
|
2763 p = addrs[addrs_count - 1] + page_size;
|
|
2764 }
|
|
2765 return end;
|
|
2766 }
|
|
2767
|
|
2768 bool os::uncommit_memory(char* addr, size_t bytes) {
|
|
2769 size_t size = bytes;
|
|
2770 // Map uncommitted pages PROT_NONE so we fail early if we touch an
|
|
2771 // uncommitted page. Otherwise, the read/write might succeed if we
|
|
2772 // have enough swap space to back the physical page.
|
|
2773 return
|
|
2774 NULL != Solaris::mmap_chunk(addr, size,
|
|
2775 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
|
|
2776 PROT_NONE);
|
|
2777 }
|
|
2778
|
|
2779 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
|
|
2780 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
|
|
2781
|
|
2782 if (b == MAP_FAILED) {
|
|
2783 return NULL;
|
|
2784 }
|
|
2785 return b;
|
|
2786 }
|
|
2787
|
|
2788 char*
|
|
2789 os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) {
|
|
2790 char* addr = NULL;
|
|
2791 int flags;
|
|
2792
|
|
2793 flags = MAP_PRIVATE | MAP_NORESERVE;
|
|
2794 if (requested_addr != NULL) {
|
|
2795 flags |= MAP_FIXED;
|
|
2796 addr = requested_addr;
|
|
2797 } else if (has_map_align && alignment_hint > (size_t) vm_page_size()) {
|
|
2798 flags |= MAP_ALIGN;
|
|
2799 addr = (char*) alignment_hint;
|
|
2800 }
|
|
2801
|
|
2802 // Map uncommitted pages PROT_NONE so we fail early if we touch an
|
|
2803 // uncommitted page. Otherwise, the read/write might succeed if we
|
|
2804 // have enough swap space to back the physical page.
|
|
2805 addr = Solaris::mmap_chunk(addr, bytes, flags, PROT_NONE);
|
|
2806
|
|
2807 guarantee(requested_addr == NULL || requested_addr == addr,
|
|
2808 "OS failed to return requested mmap address.");
|
|
2809
|
|
2810 return addr;
|
|
2811 }
|
|
2812
|
|
2813 // Reserve memory at an arbitrary address, only if that area is
|
|
2814 // available (and not reserved for something else).
|
|
2815
|
|
2816 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
|
|
2817 const int max_tries = 10;
|
|
2818 char* base[max_tries];
|
|
2819 size_t size[max_tries];
|
|
2820
|
|
2821 // Solaris adds a gap between mmap'ed regions. The size of the gap
|
|
2822 // is dependent on the requested size and the MMU. Our initial gap
|
|
2823 // value here is just a guess and will be corrected later.
|
|
2824 bool had_top_overlap = false;
|
|
2825 bool have_adjusted_gap = false;
|
|
2826 size_t gap = 0x400000;
|
|
2827
|
|
2828 // Assert only that the size is a multiple of the page size, since
|
|
2829 // that's all that mmap requires, and since that's all we really know
|
|
2830 // about at this low abstraction level. If we need higher alignment,
|
|
2831 // we can either pass an alignment to this method or verify alignment
|
|
2832 // in one of the methods further up the call chain. See bug 5044738.
|
|
2833 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
|
|
2834
|
|
2835 // Repeatedly allocate blocks until the block is allocated at the
|
|
2836 // right spot. Give up after max_tries.
|
|
2837 int i;
|
|
2838 for (i = 0; i < max_tries; ++i) {
|
|
2839 base[i] = reserve_memory(bytes);
|
|
2840
|
|
2841 if (base[i] != NULL) {
|
|
2842 // Is this the block we wanted?
|
|
2843 if (base[i] == requested_addr) {
|
|
2844 size[i] = bytes;
|
|
2845 break;
|
|
2846 }
|
|
2847
|
|
2848 // check that the gap value is right
|
|
2849 if (had_top_overlap && !have_adjusted_gap) {
|
|
2850 size_t actual_gap = base[i-1] - base[i] - bytes;
|
|
2851 if (gap != actual_gap) {
|
|
2852 // adjust the gap value and retry the last 2 allocations
|
|
2853 assert(i > 0, "gap adjustment code problem");
|
|
2854 have_adjusted_gap = true; // adjust the gap only once, just in case
|
|
2855 gap = actual_gap;
|
|
2856 if (PrintMiscellaneous && Verbose) {
|
|
2857 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
|
|
2858 }
|
|
2859 unmap_memory(base[i], bytes);
|
|
2860 unmap_memory(base[i-1], size[i-1]);
|
|
2861 i-=2;
|
|
2862 continue;
|
|
2863 }
|
|
2864 }
|
|
2865
|
|
2866 // Does this overlap the block we wanted? Give back the overlapped
|
|
2867 // parts and try again.
|
|
2868 //
|
|
2869 // There is still a bug in this code: if top_overlap == bytes,
|
|
2870 // the overlap is offset from requested region by the value of gap.
|
|
2871 // In this case giving back the overlapped part will not work,
|
|
2872 // because we'll give back the entire block at base[i] and
|
|
2873 // therefore the subsequent allocation will not generate a new gap.
|
|
2874 // This could be fixed with a new algorithm that used larger
|
|
2875 // or variable size chunks to find the requested region -
|
|
2876 // but such a change would introduce additional complications.
|
|
2877 // It's rare enough that the planets align for this bug,
|
|
2878 // so we'll just wait for a fix for 6204603/5003415 which
|
|
2879 // will provide a mmap flag to allow us to avoid this business.
|
|
2880
|
|
2881 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
|
|
2882 if (top_overlap >= 0 && top_overlap < bytes) {
|
|
2883 had_top_overlap = true;
|
|
2884 unmap_memory(base[i], top_overlap);
|
|
2885 base[i] += top_overlap;
|
|
2886 size[i] = bytes - top_overlap;
|
|
2887 } else {
|
|
2888 size_t bottom_overlap = base[i] + bytes - requested_addr;
|
|
2889 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
|
|
2890 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
|
|
2891 warning("attempt_reserve_memory_at: possible alignment bug");
|
|
2892 }
|
|
2893 unmap_memory(requested_addr, bottom_overlap);
|
|
2894 size[i] = bytes - bottom_overlap;
|
|
2895 } else {
|
|
2896 size[i] = bytes;
|
|
2897 }
|
|
2898 }
|
|
2899 }
|
|
2900 }
|
|
2901
|
|
2902 // Give back the unused reserved pieces.
|
|
2903
|
|
2904 for (int j = 0; j < i; ++j) {
|
|
2905 if (base[j] != NULL) {
|
|
2906 unmap_memory(base[j], size[j]);
|
|
2907 }
|
|
2908 }
|
|
2909
|
|
2910 return (i < max_tries) ? requested_addr : NULL;
|
|
2911 }
|
|
2912
|
|
2913 bool os::release_memory(char* addr, size_t bytes) {
|
|
2914 size_t size = bytes;
|
|
2915 return munmap(addr, size) == 0;
|
|
2916 }
|
|
2917
|
|
2918 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
|
|
2919 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
|
|
2920 "addr must be page aligned");
|
|
2921 int retVal = mprotect(addr, bytes, prot);
|
|
2922 return retVal == 0;
|
|
2923 }
|
|
2924
|
|
2925 // Protect memory (make it read-only. (Used to pass readonly pages through
|
|
2926 // JNI GetArray<type>Elements with empty arrays.)
|
|
2927 bool os::protect_memory(char* addr, size_t bytes) {
|
|
2928 return solaris_mprotect(addr, bytes, PROT_READ);
|
|
2929 }
|
|
2930
|
|
2931 // guard_memory and unguard_memory only happens within stack guard pages.
|
|
2932 // Since ISM pertains only to the heap, guard and unguard memory should not
|
|
2933 /// happen with an ISM region.
|
|
2934 bool os::guard_memory(char* addr, size_t bytes) {
|
|
2935 return solaris_mprotect(addr, bytes, PROT_NONE);
|
|
2936 }
|
|
2937
|
|
2938 bool os::unguard_memory(char* addr, size_t bytes) {
|
|
2939 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE|PROT_EXEC);
|
|
2940 }
|
|
2941
|
|
2942 // Large page support
|
|
2943
|
|
2944 // UseLargePages is the master flag to enable/disable large page memory.
|
|
2945 // UseMPSS and UseISM are supported for compatibility reasons. Their combined
|
|
2946 // effects can be described in the following table:
|
|
2947 //
|
|
2948 // UseLargePages UseMPSS UseISM
|
|
2949 // false * * => UseLargePages is the master switch, turning
|
|
2950 // it off will turn off both UseMPSS and
|
|
2951 // UseISM. VM will not use large page memory
|
|
2952 // regardless the settings of UseMPSS/UseISM.
|
|
2953 // true false false => Unless future Solaris provides other
|
|
2954 // mechanism to use large page memory, this
|
|
2955 // combination is equivalent to -UseLargePages,
|
|
2956 // VM will not use large page memory
|
|
2957 // true true false => JVM will use MPSS for large page memory.
|
|
2958 // This is the default behavior.
|
|
2959 // true false true => JVM will use ISM for large page memory.
|
|
2960 // true true true => JVM will use ISM if it is available.
|
|
2961 // Otherwise, JVM will fall back to MPSS.
|
|
2962 // Becaues ISM is now available on all
|
|
2963 // supported Solaris versions, this combination
|
|
2964 // is equivalent to +UseISM -UseMPSS.
|
|
2965
|
|
2966 typedef int (*getpagesizes_func_type) (size_t[], int);
|
|
2967 static size_t _large_page_size = 0;
|
|
2968
|
|
2969 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) {
|
|
2970 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address
|
|
2971 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc
|
|
2972 // can support multiple page sizes.
|
|
2973
|
|
2974 // Don't bother to probe page size because getpagesizes() comes with MPSS.
|
|
2975 // ISM is only recommended on old Solaris where there is no MPSS support.
|
|
2976 // Simply choose a conservative value as default.
|
|
2977 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes :
|
|
2978 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M);
|
|
2979
|
|
2980 // ISM is available on all supported Solaris versions
|
|
2981 return true;
|
|
2982 }
|
|
2983
|
|
2984 // Insertion sort for small arrays (descending order).
|
|
2985 static void insertion_sort_descending(size_t* array, int len) {
|
|
2986 for (int i = 0; i < len; i++) {
|
|
2987 size_t val = array[i];
|
|
2988 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
|
|
2989 size_t tmp = array[key];
|
|
2990 array[key] = array[key - 1];
|
|
2991 array[key - 1] = tmp;
|
|
2992 }
|
|
2993 }
|
|
2994 }
|
|
2995
|
|
2996 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) {
|
|
2997 getpagesizes_func_type getpagesizes_func =
|
|
2998 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes"));
|
|
2999 if (getpagesizes_func == NULL) {
|
|
3000 if (warn) {
|
|
3001 warning("MPSS is not supported by the operating system.");
|
|
3002 }
|
|
3003 return false;
|
|
3004 }
|
|
3005
|
|
3006 const unsigned int usable_count = VM_Version::page_size_count();
|
|
3007 if (usable_count == 1) {
|
|
3008 return false;
|
|
3009 }
|
|
3010
|
|
3011 // Fill the array of page sizes.
|
|
3012 int n = getpagesizes_func(_page_sizes, page_sizes_max);
|
|
3013 assert(n > 0, "Solaris bug?");
|
|
3014 if (n == page_sizes_max) {
|
|
3015 // Add a sentinel value (necessary only if the array was completely filled
|
|
3016 // since it is static (zeroed at initialization)).
|
|
3017 _page_sizes[--n] = 0;
|
|
3018 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
|
|
3019 }
|
|
3020 assert(_page_sizes[n] == 0, "missing sentinel");
|
|
3021
|
|
3022 if (n == 1) return false; // Only one page size available.
|
|
3023
|
|
3024 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
|
|
3025 // select up to usable_count elements. First sort the array, find the first
|
|
3026 // acceptable value, then copy the usable sizes to the top of the array and
|
|
3027 // trim the rest. Make sure to include the default page size :-).
|
|
3028 //
|
|
3029 // A better policy could get rid of the 4M limit by taking the sizes of the
|
|
3030 // important VM memory regions (java heap and possibly the code cache) into
|
|
3031 // account.
|
|
3032 insertion_sort_descending(_page_sizes, n);
|
|
3033 const size_t size_limit =
|
|
3034 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
|
|
3035 int beg;
|
|
3036 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ;
|
|
3037 const int end = MIN2((int)usable_count, n) - 1;
|
|
3038 for (int cur = 0; cur < end; ++cur, ++beg) {
|
|
3039 _page_sizes[cur] = _page_sizes[beg];
|
|
3040 }
|
|
3041 _page_sizes[end] = vm_page_size();
|
|
3042 _page_sizes[end + 1] = 0;
|
|
3043
|
|
3044 if (_page_sizes[end] > _page_sizes[end - 1]) {
|
|
3045 // Default page size is not the smallest; sort again.
|
|
3046 insertion_sort_descending(_page_sizes, end + 1);
|
|
3047 }
|
|
3048 *page_size = _page_sizes[0];
|
|
3049
|
|
3050 return true;
|
|
3051 }
|
|
3052
|
|
3053 bool os::large_page_init() {
|
|
3054 if (!UseLargePages) {
|
|
3055 UseISM = false;
|
|
3056 UseMPSS = false;
|
|
3057 return false;
|
|
3058 }
|
|
3059
|
|
3060 // print a warning if any large page related flag is specified on command line
|
|
3061 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
|
|
3062 !FLAG_IS_DEFAULT(UseISM) ||
|
|
3063 !FLAG_IS_DEFAULT(UseMPSS) ||
|
|
3064 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
|
|
3065 UseISM = UseISM &&
|
|
3066 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size);
|
|
3067 if (UseISM) {
|
|
3068 // ISM disables MPSS to be compatible with old JDK behavior
|
|
3069 UseMPSS = false;
|
|
3070 }
|
|
3071
|
|
3072 UseMPSS = UseMPSS &&
|
|
3073 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
|
|
3074
|
|
3075 UseLargePages = UseISM || UseMPSS;
|
|
3076 return UseLargePages;
|
|
3077 }
|
|
3078
|
|
3079 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) {
|
|
3080 // Signal to OS that we want large pages for addresses
|
|
3081 // from addr, addr + bytes
|
|
3082 struct memcntl_mha mpss_struct;
|
|
3083 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
|
|
3084 mpss_struct.mha_pagesize = align;
|
|
3085 mpss_struct.mha_flags = 0;
|
|
3086 if (memcntl(start, bytes, MC_HAT_ADVISE,
|
|
3087 (caddr_t) &mpss_struct, 0, 0) < 0) {
|
|
3088 debug_only(warning("Attempt to use MPSS failed."));
|
|
3089 return false;
|
|
3090 }
|
|
3091 return true;
|
|
3092 }
|
|
3093
|
|
3094 char* os::reserve_memory_special(size_t bytes) {
|
|
3095 assert(UseLargePages && UseISM, "only for ISM large pages");
|
|
3096
|
|
3097 size_t size = bytes;
|
|
3098 char* retAddr = NULL;
|
|
3099 int shmid;
|
|
3100 key_t ismKey;
|
|
3101
|
|
3102 bool warn_on_failure = UseISM &&
|
|
3103 (!FLAG_IS_DEFAULT(UseLargePages) ||
|
|
3104 !FLAG_IS_DEFAULT(UseISM) ||
|
|
3105 !FLAG_IS_DEFAULT(LargePageSizeInBytes)
|
|
3106 );
|
|
3107 char msg[128];
|
|
3108
|
|
3109 ismKey = IPC_PRIVATE;
|
|
3110
|
|
3111 // Create a large shared memory region to attach to based on size.
|
|
3112 // Currently, size is the total size of the heap
|
|
3113 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT);
|
|
3114 if (shmid == -1){
|
|
3115 if (warn_on_failure) {
|
|
3116 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno);
|
|
3117 warning(msg);
|
|
3118 }
|
|
3119 return NULL;
|
|
3120 }
|
|
3121
|
|
3122 // Attach to the region
|
|
3123 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W);
|
|
3124 int err = errno;
|
|
3125
|
|
3126 // Remove shmid. If shmat() is successful, the actual shared memory segment
|
|
3127 // will be deleted when it's detached by shmdt() or when the process
|
|
3128 // terminates. If shmat() is not successful this will remove the shared
|
|
3129 // segment immediately.
|
|
3130 shmctl(shmid, IPC_RMID, NULL);
|
|
3131
|
|
3132 if (retAddr == (char *) -1) {
|
|
3133 if (warn_on_failure) {
|
|
3134 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err);
|
|
3135 warning(msg);
|
|
3136 }
|
|
3137 return NULL;
|
|
3138 }
|
|
3139
|
|
3140 return retAddr;
|
|
3141 }
|
|
3142
|
|
3143 bool os::release_memory_special(char* base, size_t bytes) {
|
|
3144 // detaching the SHM segment will also delete it, see reserve_memory_special()
|
|
3145 int rslt = shmdt(base);
|
|
3146 return rslt == 0;
|
|
3147 }
|
|
3148
|
|
3149 size_t os::large_page_size() {
|
|
3150 return _large_page_size;
|
|
3151 }
|
|
3152
|
|
3153 // MPSS allows application to commit large page memory on demand; with ISM
|
|
3154 // the entire memory region must be allocated as shared memory.
|
|
3155 bool os::can_commit_large_page_memory() {
|
|
3156 return UseISM ? false : true;
|
|
3157 }
|
|
3158
|
|
3159 static int os_sleep(jlong millis, bool interruptible) {
|
|
3160 const jlong limit = INT_MAX;
|
|
3161 jlong prevtime;
|
|
3162 int res;
|
|
3163
|
|
3164 while (millis > limit) {
|
|
3165 if ((res = os_sleep(limit, interruptible)) != OS_OK)
|
|
3166 return res;
|
|
3167 millis -= limit;
|
|
3168 }
|
|
3169
|
|
3170 // Restart interrupted polls with new parameters until the proper delay
|
|
3171 // has been completed.
|
|
3172
|
|
3173 prevtime = getTimeMillis();
|
|
3174
|
|
3175 while (millis > 0) {
|
|
3176 jlong newtime;
|
|
3177
|
|
3178 if (!interruptible) {
|
|
3179 // Following assert fails for os::yield_all:
|
|
3180 // assert(!thread->is_Java_thread(), "must not be java thread");
|
|
3181 res = poll(NULL, 0, millis);
|
|
3182 } else {
|
|
3183 JavaThread *jt = JavaThread::current();
|
|
3184
|
|
3185 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt,
|
|
3186 os::Solaris::clear_interrupted);
|
|
3187 }
|
|
3188
|
|
3189 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for
|
|
3190 // thread.Interrupt.
|
|
3191
|
|
3192 if((res == OS_ERR) && (errno == EINTR)) {
|
|
3193 newtime = getTimeMillis();
|
|
3194 assert(newtime >= prevtime, "time moving backwards");
|
|
3195 /* Doing prevtime and newtime in microseconds doesn't help precision,
|
|
3196 and trying to round up to avoid lost milliseconds can result in a
|
|
3197 too-short delay. */
|
|
3198 millis -= newtime - prevtime;
|
|
3199 if(millis <= 0)
|
|
3200 return OS_OK;
|
|
3201 prevtime = newtime;
|
|
3202 } else
|
|
3203 return res;
|
|
3204 }
|
|
3205
|
|
3206 return OS_OK;
|
|
3207 }
|
|
3208
|
|
3209 // Read calls from inside the vm need to perform state transitions
|
|
3210 size_t os::read(int fd, void *buf, unsigned int nBytes) {
|
|
3211 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
|
|
3212 }
|
|
3213
|
|
3214 int os::sleep(Thread* thread, jlong millis, bool interruptible) {
|
|
3215 assert(thread == Thread::current(), "thread consistency check");
|
|
3216
|
|
3217 // TODO-FIXME: this should be removed.
|
|
3218 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock
|
|
3219 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate
|
|
3220 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving
|
|
3221 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel
|
|
3222 // is fooled into believing that the system is making progress. In the code below we block the
|
|
3223 // the watcher thread while safepoint is in progress so that it would not appear as though the
|
|
3224 // system is making progress.
|
|
3225 if (!Solaris::T2_libthread() &&
|
|
3226 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) {
|
|
3227 // We now try to acquire the threads lock. Since this lock is held by the VM thread during
|
|
3228 // the entire safepoint, the watcher thread will line up here during the safepoint.
|
|
3229 Threads_lock->lock_without_safepoint_check();
|
|
3230 Threads_lock->unlock();
|
|
3231 }
|
|
3232
|
|
3233 if (thread->is_Java_thread()) {
|
|
3234 // This is a JavaThread so we honor the _thread_blocked protocol
|
|
3235 // even for sleeps of 0 milliseconds. This was originally done
|
|
3236 // as a workaround for bug 4338139. However, now we also do it
|
|
3237 // to honor the suspend-equivalent protocol.
|
|
3238
|
|
3239 JavaThread *jt = (JavaThread *) thread;
|
|
3240 ThreadBlockInVM tbivm(jt);
|
|
3241
|
|
3242 jt->set_suspend_equivalent();
|
|
3243 // cleared by handle_special_suspend_equivalent_condition() or
|
|
3244 // java_suspend_self() via check_and_wait_while_suspended()
|
|
3245
|
|
3246 int ret_code;
|
|
3247 if (millis <= 0) {
|
|
3248 thr_yield();
|
|
3249 ret_code = 0;
|
|
3250 } else {
|
|
3251 // The original sleep() implementation did not create an
|
|
3252 // OSThreadWaitState helper for sleeps of 0 milliseconds.
|
|
3253 // I'm preserving that decision for now.
|
|
3254 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
|
|
3255
|
|
3256 ret_code = os_sleep(millis, interruptible);
|
|
3257 }
|
|
3258
|
|
3259 // were we externally suspended while we were waiting?
|
|
3260 jt->check_and_wait_while_suspended();
|
|
3261
|
|
3262 return ret_code;
|
|
3263 }
|
|
3264
|
|
3265 // non-JavaThread from this point on:
|
|
3266
|
|
3267 if (millis <= 0) {
|
|
3268 thr_yield();
|
|
3269 return 0;
|
|
3270 }
|
|
3271
|
|
3272 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
|
|
3273
|
|
3274 return os_sleep(millis, interruptible);
|
|
3275 }
|
|
3276
|
|
3277 int os::naked_sleep() {
|
|
3278 // %% make the sleep time an integer flag. for now use 1 millisec.
|
|
3279 return os_sleep(1, false);
|
|
3280 }
|
|
3281
|
|
3282 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
|
|
3283 void os::infinite_sleep() {
|
|
3284 while (true) { // sleep forever ...
|
|
3285 ::sleep(100); // ... 100 seconds at a time
|
|
3286 }
|
|
3287 }
|
|
3288
|
|
3289 // Used to convert frequent JVM_Yield() to nops
|
|
3290 bool os::dont_yield() {
|
|
3291 if (DontYieldALot) {
|
|
3292 static hrtime_t last_time = 0;
|
|
3293 hrtime_t diff = getTimeNanos() - last_time;
|
|
3294
|
|
3295 if (diff < DontYieldALotInterval * 1000000)
|
|
3296 return true;
|
|
3297
|
|
3298 last_time += diff;
|
|
3299
|
|
3300 return false;
|
|
3301 }
|
|
3302 else {
|
|
3303 return false;
|
|
3304 }
|
|
3305 }
|
|
3306
|
|
3307 // Caveat: Solaris os::yield() causes a thread-state transition whereas
|
|
3308 // the linux and win32 implementations do not. This should be checked.
|
|
3309
|
|
3310 void os::yield() {
|
|
3311 // Yields to all threads with same or greater priority
|
|
3312 os::sleep(Thread::current(), 0, false);
|
|
3313 }
|
|
3314
|
|
3315 // Note that yield semantics are defined by the scheduling class to which
|
|
3316 // the thread currently belongs. Typically, yield will _not yield to
|
|
3317 // other equal or higher priority threads that reside on the dispatch queues
|
|
3318 // of other CPUs.
|
|
3319
|
|
3320 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; }
|
|
3321
|
|
3322
|
|
3323 // On Solaris we found that yield_all doesn't always yield to all other threads.
|
|
3324 // There have been cases where there is a thread ready to execute but it doesn't
|
|
3325 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond.
|
|
3326 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a
|
|
3327 // SIGWAITING signal which will cause a new lwp to be created. So we count the
|
|
3328 // number of times yield_all is called in the one loop and increase the sleep
|
|
3329 // time after 8 attempts. If this fails too we increase the concurrency level
|
|
3330 // so that the starving thread would get an lwp
|
|
3331
|
|
3332 void os::yield_all(int attempts) {
|
|
3333 // Yields to all threads, including threads with lower priorities
|
|
3334 if (attempts == 0) {
|
|
3335 os::sleep(Thread::current(), 1, false);
|
|
3336 } else {
|
|
3337 int iterations = attempts % 30;
|
|
3338 if (iterations == 0 && !os::Solaris::T2_libthread()) {
|
|
3339 // thr_setconcurrency and _getconcurrency make sense only under T1.
|
|
3340 int noofLWPS = thr_getconcurrency();
|
|
3341 if (noofLWPS < (Threads::number_of_threads() + 2)) {
|
|
3342 thr_setconcurrency(thr_getconcurrency() + 1);
|
|
3343 }
|
|
3344 } else if (iterations < 25) {
|
|
3345 os::sleep(Thread::current(), 1, false);
|
|
3346 } else {
|
|
3347 os::sleep(Thread::current(), 10, false);
|
|
3348 }
|
|
3349 }
|
|
3350 }
|
|
3351
|
|
3352 // Called from the tight loops to possibly influence time-sharing heuristics
|
|
3353 void os::loop_breaker(int attempts) {
|
|
3354 os::yield_all(attempts);
|
|
3355 }
|
|
3356
|
|
3357
|
|
3358 // Interface for setting lwp priorities. If we are using T2 libthread,
|
|
3359 // which forces the use of BoundThreads or we manually set UseBoundThreads,
|
|
3360 // all of our threads will be assigned to real lwp's. Using the thr_setprio
|
|
3361 // function is meaningless in this mode so we must adjust the real lwp's priority
|
|
3362 // The routines below implement the getting and setting of lwp priorities.
|
|
3363 //
|
|
3364 // Note: There are three priority scales used on Solaris. Java priotities
|
|
3365 // which range from 1 to 10, libthread "thr_setprio" scale which range
|
|
3366 // from 0 to 127, and the current scheduling class of the process we
|
|
3367 // are running in. This is typically from -60 to +60.
|
|
3368 // The setting of the lwp priorities in done after a call to thr_setprio
|
|
3369 // so Java priorities are mapped to libthread priorities and we map from
|
|
3370 // the latter to lwp priorities. We don't keep priorities stored in
|
|
3371 // Java priorities since some of our worker threads want to set priorities
|
|
3372 // higher than all Java threads.
|
|
3373 //
|
|
3374 // For related information:
|
|
3375 // (1) man -s 2 priocntl
|
|
3376 // (2) man -s 4 priocntl
|
|
3377 // (3) man dispadmin
|
|
3378 // = librt.so
|
|
3379 // = libthread/common/rtsched.c - thrp_setlwpprio().
|
|
3380 // = ps -cL <pid> ... to validate priority.
|
|
3381 // = sched_get_priority_min and _max
|
|
3382 // pthread_create
|
|
3383 // sched_setparam
|
|
3384 // pthread_setschedparam
|
|
3385 //
|
|
3386 // Assumptions:
|
|
3387 // + We assume that all threads in the process belong to the same
|
|
3388 // scheduling class. IE. an homogenous process.
|
|
3389 // + Must be root or in IA group to change change "interactive" attribute.
|
|
3390 // Priocntl() will fail silently. The only indication of failure is when
|
|
3391 // we read-back the value and notice that it hasn't changed.
|
|
3392 // + Interactive threads enter the runq at the head, non-interactive at the tail.
|
|
3393 // + For RT, change timeslice as well. Invariant:
|
|
3394 // constant "priority integral"
|
|
3395 // Konst == TimeSlice * (60-Priority)
|
|
3396 // Given a priority, compute appropriate timeslice.
|
|
3397 // + Higher numerical values have higher priority.
|
|
3398
|
|
3399 // sched class attributes
|
|
3400 typedef struct {
|
|
3401 int schedPolicy; // classID
|
|
3402 int maxPrio;
|
|
3403 int minPrio;
|
|
3404 } SchedInfo;
|
|
3405
|
|
3406
|
|
3407 static SchedInfo tsLimits, iaLimits, rtLimits;
|
|
3408
|
|
3409 #ifdef ASSERT
|
|
3410 static int ReadBackValidate = 1;
|
|
3411 #endif
|
|
3412 static int myClass = 0;
|
|
3413 static int myMin = 0;
|
|
3414 static int myMax = 0;
|
|
3415 static int myCur = 0;
|
|
3416 static bool priocntl_enable = false;
|
|
3417
|
|
3418
|
|
3419 // Call the version of priocntl suitable for all supported versions
|
|
3420 // of Solaris. We need to call through this wrapper so that we can
|
|
3421 // build on Solaris 9 and run on Solaris 8, 9 and 10.
|
|
3422 //
|
|
3423 // This code should be removed if we ever stop supporting Solaris 8
|
|
3424 // and earlier releases.
|
|
3425
|
|
3426 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
|
|
3427 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
|
|
3428 static priocntl_type priocntl_ptr = priocntl_stub;
|
|
3429
|
|
3430 // Stub to set the value of the real pointer, and then call the real
|
|
3431 // function.
|
|
3432
|
|
3433 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) {
|
|
3434 // Try Solaris 8- name only.
|
|
3435 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl");
|
|
3436 guarantee(tmp != NULL, "priocntl function not found.");
|
|
3437 priocntl_ptr = tmp;
|
|
3438 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg);
|
|
3439 }
|
|
3440
|
|
3441
|
|
3442 // lwp_priocntl_init
|
|
3443 //
|
|
3444 // Try to determine the priority scale for our process.
|
|
3445 //
|
|
3446 // Return errno or 0 if OK.
|
|
3447 //
|
|
3448 static
|
|
3449 int lwp_priocntl_init ()
|
|
3450 {
|
|
3451 int rslt;
|
|
3452 pcinfo_t ClassInfo;
|
|
3453 pcparms_t ParmInfo;
|
|
3454 int i;
|
|
3455
|
|
3456 if (!UseThreadPriorities) return 0;
|
|
3457
|
|
3458 // We are using Bound threads, we need to determine our priority ranges
|
|
3459 if (os::Solaris::T2_libthread() || UseBoundThreads) {
|
|
3460 // If ThreadPriorityPolicy is 1, switch tables
|
|
3461 if (ThreadPriorityPolicy == 1) {
|
|
3462 for (i = 0 ; i < MaxPriority+1; i++)
|
|
3463 os::java_to_os_priority[i] = prio_policy1[i];
|
|
3464 }
|
|
3465 }
|
|
3466 // Not using Bound Threads, set to ThreadPolicy 1
|
|
3467 else {
|
|
3468 for ( i = 0 ; i < MaxPriority+1; i++ ) {
|
|
3469 os::java_to_os_priority[i] = prio_policy1[i];
|
|
3470 }
|
|
3471 return 0;
|
|
3472 }
|
|
3473
|
|
3474
|
|
3475 // Get IDs for a set of well-known scheduling classes.
|
|
3476 // TODO-FIXME: GETCLINFO returns the current # of classes in the
|
|
3477 // the system. We should have a loop that iterates over the
|
|
3478 // classID values, which are known to be "small" integers.
|
|
3479
|
|
3480 strcpy(ClassInfo.pc_clname, "TS");
|
|
3481 ClassInfo.pc_cid = -1;
|
|
3482 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
|
|
3483 if (rslt < 0) return errno;
|
|
3484 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
|
|
3485 tsLimits.schedPolicy = ClassInfo.pc_cid;
|
|
3486 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
|
|
3487 tsLimits.minPrio = -tsLimits.maxPrio;
|
|
3488
|
|
3489 strcpy(ClassInfo.pc_clname, "IA");
|
|
3490 ClassInfo.pc_cid = -1;
|
|
3491 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
|
|
3492 if (rslt < 0) return errno;
|
|
3493 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
|
|
3494 iaLimits.schedPolicy = ClassInfo.pc_cid;
|
|
3495 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
|
|
3496 iaLimits.minPrio = -iaLimits.maxPrio;
|
|
3497
|
|
3498 strcpy(ClassInfo.pc_clname, "RT");
|
|
3499 ClassInfo.pc_cid = -1;
|
|
3500 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
|
|
3501 if (rslt < 0) return errno;
|
|
3502 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
|
|
3503 rtLimits.schedPolicy = ClassInfo.pc_cid;
|
|
3504 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
|
|
3505 rtLimits.minPrio = 0;
|
|
3506
|
|
3507
|
|
3508 // Query our "current" scheduling class.
|
|
3509 // This will normally be IA,TS or, rarely, RT.
|
|
3510 memset (&ParmInfo, 0, sizeof(ParmInfo));
|
|
3511 ParmInfo.pc_cid = PC_CLNULL;
|
|
3512 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo );
|
|
3513 if ( rslt < 0 ) return errno;
|
|
3514 myClass = ParmInfo.pc_cid;
|
|
3515
|
|
3516 // We now know our scheduling classId, get specific information
|
|
3517 // the class.
|
|
3518 ClassInfo.pc_cid = myClass;
|
|
3519 ClassInfo.pc_clname[0] = 0;
|
|
3520 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo );
|
|
3521 if ( rslt < 0 ) return errno;
|
|
3522
|
|
3523 if (ThreadPriorityVerbose)
|
|
3524 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
|
|
3525
|
|
3526 memset(&ParmInfo, 0, sizeof(pcparms_t));
|
|
3527 ParmInfo.pc_cid = PC_CLNULL;
|
|
3528 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
|
|
3529 if (rslt < 0) return errno;
|
|
3530
|
|
3531 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
|
|
3532 myMin = rtLimits.minPrio;
|
|
3533 myMax = rtLimits.maxPrio;
|
|
3534 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
|
|
3535 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
|
|
3536 myMin = iaLimits.minPrio;
|
|
3537 myMax = iaLimits.maxPrio;
|
|
3538 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
|
|
3539 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
|
|
3540 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
|
|
3541 myMin = tsLimits.minPrio;
|
|
3542 myMax = tsLimits.maxPrio;
|
|
3543 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
|
|
3544 } else {
|
|
3545 // No clue - punt
|
|
3546 if (ThreadPriorityVerbose)
|
|
3547 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname);
|
|
3548 return EINVAL; // no clue, punt
|
|
3549 }
|
|
3550
|
|
3551 if (ThreadPriorityVerbose)
|
|
3552 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax);
|
|
3553
|
|
3554 priocntl_enable = true; // Enable changing priorities
|
|
3555 return 0;
|
|
3556 }
|
|
3557
|
|
3558 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
|
|
3559 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
|
|
3560 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
|
|
3561
|
|
3562
|
|
3563 // scale_to_lwp_priority
|
|
3564 //
|
|
3565 // Convert from the libthread "thr_setprio" scale to our current
|
|
3566 // lwp scheduling class scale.
|
|
3567 //
|
|
3568 static
|
|
3569 int scale_to_lwp_priority (int rMin, int rMax, int x)
|
|
3570 {
|
|
3571 int v;
|
|
3572
|
|
3573 if (x == 127) return rMax; // avoid round-down
|
|
3574 v = (((x*(rMax-rMin)))/128)+rMin;
|
|
3575 return v;
|
|
3576 }
|
|
3577
|
|
3578
|
|
3579 // set_lwp_priority
|
|
3580 //
|
|
3581 // Set the priority of the lwp. This call should only be made
|
|
3582 // when using bound threads (T2 threads are bound by default).
|
|
3583 //
|
|
3584 int set_lwp_priority (int ThreadID, int lwpid, int newPrio )
|
|
3585 {
|
|
3586 int rslt;
|
|
3587 int Actual, Expected, prv;
|
|
3588 pcparms_t ParmInfo; // for GET-SET
|
|
3589 #ifdef ASSERT
|
|
3590 pcparms_t ReadBack; // for readback
|
|
3591 #endif
|
|
3592
|
|
3593 // Set priority via PC_GETPARMS, update, PC_SETPARMS
|
|
3594 // Query current values.
|
|
3595 // TODO: accelerate this by eliminating the PC_GETPARMS call.
|
|
3596 // Cache "pcparms_t" in global ParmCache.
|
|
3597 // TODO: elide set-to-same-value
|
|
3598
|
|
3599 // If something went wrong on init, don't change priorities.
|
|
3600 if ( !priocntl_enable ) {
|
|
3601 if (ThreadPriorityVerbose)
|
|
3602 tty->print_cr("Trying to set priority but init failed, ignoring");
|
|
3603 return EINVAL;
|
|
3604 }
|
|
3605
|
|
3606
|
|
3607 // If lwp hasn't started yet, just return
|
|
3608 // the _start routine will call us again.
|
|
3609 if ( lwpid <= 0 ) {
|
|
3610 if (ThreadPriorityVerbose) {
|
|
3611 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set",
|
|
3612 ThreadID, newPrio);
|
|
3613 }
|
|
3614 return 0;
|
|
3615 }
|
|
3616
|
|
3617 if (ThreadPriorityVerbose) {
|
|
3618 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
|
|
3619 ThreadID, lwpid, newPrio);
|
|
3620 }
|
|
3621
|
|
3622 memset(&ParmInfo, 0, sizeof(pcparms_t));
|
|
3623 ParmInfo.pc_cid = PC_CLNULL;
|
|
3624 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
|
|
3625 if (rslt < 0) return errno;
|
|
3626
|
|
3627 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
|
|
3628 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
|
|
3629 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio);
|
|
3630 rtInfo->rt_tqsecs = RT_NOCHANGE;
|
|
3631 rtInfo->rt_tqnsecs = RT_NOCHANGE;
|
|
3632 if (ThreadPriorityVerbose) {
|
|
3633 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
|
|
3634 }
|
|
3635 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
|
|
3636 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
|
|
3637 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim);
|
|
3638 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio);
|
|
3639 iaInfo->ia_uprilim = IA_NOCHANGE;
|
|
3640 iaInfo->ia_nice = IA_NOCHANGE;
|
|
3641 iaInfo->ia_mode = IA_NOCHANGE;
|
|
3642 if (ThreadPriorityVerbose) {
|
|
3643 tty->print_cr ("IA: [%d...%d] %d->%d\n",
|
|
3644 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
|
|
3645 }
|
|
3646 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
|
|
3647 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
|
|
3648 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim);
|
|
3649 prv = tsInfo->ts_upri;
|
|
3650 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio);
|
|
3651 tsInfo->ts_uprilim = IA_NOCHANGE;
|
|
3652 if (ThreadPriorityVerbose) {
|
|
3653 tty->print_cr ("TS: %d [%d...%d] %d->%d\n",
|
|
3654 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
|
|
3655 }
|
|
3656 if (prv == tsInfo->ts_upri) return 0;
|
|
3657 } else {
|
|
3658 if ( ThreadPriorityVerbose ) {
|
|
3659 tty->print_cr ("Unknown scheduling class\n");
|
|
3660 }
|
|
3661 return EINVAL; // no clue, punt
|
|
3662 }
|
|
3663
|
|
3664 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
|
|
3665 if (ThreadPriorityVerbose && rslt) {
|
|
3666 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
|
|
3667 }
|
|
3668 if (rslt < 0) return errno;
|
|
3669
|
|
3670 #ifdef ASSERT
|
|
3671 // Sanity check: read back what we just attempted to set.
|
|
3672 // In theory it could have changed in the interim ...
|
|
3673 //
|
|
3674 // The priocntl system call is tricky.
|
|
3675 // Sometimes it'll validate the priority value argument and
|
|
3676 // return EINVAL if unhappy. At other times it fails silently.
|
|
3677 // Readbacks are prudent.
|
|
3678
|
|
3679 if (!ReadBackValidate) return 0;
|
|
3680
|
|
3681 memset(&ReadBack, 0, sizeof(pcparms_t));
|
|
3682 ReadBack.pc_cid = PC_CLNULL;
|
|
3683 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
|
|
3684 assert(rslt >= 0, "priocntl failed");
|
|
3685 Actual = Expected = 0xBAD;
|
|
3686 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
|
|
3687 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
|
|
3688 Actual = RTPRI(ReadBack)->rt_pri;
|
|
3689 Expected = RTPRI(ParmInfo)->rt_pri;
|
|
3690 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
|
|
3691 Actual = IAPRI(ReadBack)->ia_upri;
|
|
3692 Expected = IAPRI(ParmInfo)->ia_upri;
|
|
3693 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
|
|
3694 Actual = TSPRI(ReadBack)->ts_upri;
|
|
3695 Expected = TSPRI(ParmInfo)->ts_upri;
|
|
3696 } else {
|
|
3697 if ( ThreadPriorityVerbose ) {
|
|
3698 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid);
|
|
3699 }
|
|
3700 }
|
|
3701
|
|
3702 if (Actual != Expected) {
|
|
3703 if ( ThreadPriorityVerbose ) {
|
|
3704 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
|
|
3705 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
|
|
3706 }
|
|
3707 }
|
|
3708 #endif
|
|
3709
|
|
3710 return 0;
|
|
3711 }
|
|
3712
|
|
3713
|
|
3714
|
|
3715 // Solaris only gives access to 128 real priorities at a time,
|
|
3716 // so we expand Java's ten to fill this range. This would be better
|
|
3717 // if we dynamically adjusted relative priorities.
|
|
3718 //
|
|
3719 // The ThreadPriorityPolicy option allows us to select 2 different
|
|
3720 // priority scales.
|
|
3721 //
|
|
3722 // ThreadPriorityPolicy=0
|
|
3723 // Since the Solaris' default priority is MaximumPriority, we do not
|
|
3724 // set a priority lower than Max unless a priority lower than
|
|
3725 // NormPriority is requested.
|
|
3726 //
|
|
3727 // ThreadPriorityPolicy=1
|
|
3728 // This mode causes the priority table to get filled with
|
|
3729 // linear values. NormPriority get's mapped to 50% of the
|
|
3730 // Maximum priority an so on. This will cause VM threads
|
|
3731 // to get unfair treatment against other Solaris processes
|
|
3732 // which do not explicitly alter their thread priorities.
|
|
3733 //
|
|
3734
|
|
3735
|
|
3736 int os::java_to_os_priority[MaxPriority + 1] = {
|
|
3737 -99999, // 0 Entry should never be used
|
|
3738
|
|
3739 0, // 1 MinPriority
|
|
3740 32, // 2
|
|
3741 64, // 3
|
|
3742
|
|
3743 96, // 4
|
|
3744 127, // 5 NormPriority
|
|
3745 127, // 6
|
|
3746
|
|
3747 127, // 7
|
|
3748 127, // 8
|
|
3749 127, // 9 NearMaxPriority
|
|
3750
|
|
3751 127 // 10 MaxPriority
|
|
3752 };
|
|
3753
|
|
3754
|
|
3755 OSReturn os::set_native_priority(Thread* thread, int newpri) {
|
|
3756 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
|
|
3757 if ( !UseThreadPriorities ) return OS_OK;
|
|
3758 int status = thr_setprio(thread->osthread()->thread_id(), newpri);
|
|
3759 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) )
|
|
3760 status |= (set_lwp_priority (thread->osthread()->thread_id(),
|
|
3761 thread->osthread()->lwp_id(), newpri ));
|
|
3762 return (status == 0) ? OS_OK : OS_ERR;
|
|
3763 }
|
|
3764
|
|
3765
|
|
3766 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
|
|
3767 int p;
|
|
3768 if ( !UseThreadPriorities ) {
|
|
3769 *priority_ptr = NormalPriority;
|
|
3770 return OS_OK;
|
|
3771 }
|
|
3772 int status = thr_getprio(thread->osthread()->thread_id(), &p);
|
|
3773 if (status != 0) {
|
|
3774 return OS_ERR;
|
|
3775 }
|
|
3776 *priority_ptr = p;
|
|
3777 return OS_OK;
|
|
3778 }
|
|
3779
|
|
3780
|
|
3781 // Hint to the underlying OS that a task switch would not be good.
|
|
3782 // Void return because it's a hint and can fail.
|
|
3783 void os::hint_no_preempt() {
|
|
3784 schedctl_start(schedctl_init());
|
|
3785 }
|
|
3786
|
|
3787 void os::interrupt(Thread* thread) {
|
|
3788 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
|
|
3789
|
|
3790 OSThread* osthread = thread->osthread();
|
|
3791
|
|
3792 int isInterrupted = osthread->interrupted();
|
|
3793 if (!isInterrupted) {
|
|
3794 osthread->set_interrupted(true);
|
|
3795 OrderAccess::fence();
|
|
3796 // os::sleep() is implemented with either poll (NULL,0,timeout) or
|
|
3797 // by parking on _SleepEvent. If the former, thr_kill will unwedge
|
|
3798 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper.
|
|
3799 ParkEvent * const slp = thread->_SleepEvent ;
|
|
3800 if (slp != NULL) slp->unpark() ;
|
|
3801 }
|
|
3802
|
|
3803 // For JSR166: unpark after setting status but before thr_kill -dl
|
|
3804 if (thread->is_Java_thread()) {
|
|
3805 ((JavaThread*)thread)->parker()->unpark();
|
|
3806 }
|
|
3807
|
|
3808 // Handle interruptible wait() ...
|
|
3809 ParkEvent * const ev = thread->_ParkEvent ;
|
|
3810 if (ev != NULL) ev->unpark() ;
|
|
3811
|
|
3812 // When events are used everywhere for os::sleep, then this thr_kill
|
|
3813 // will only be needed if UseVMInterruptibleIO is true.
|
|
3814
|
|
3815 if (!isInterrupted) {
|
|
3816 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt());
|
|
3817 assert_status(status == 0, status, "thr_kill");
|
|
3818
|
|
3819 // Bump thread interruption counter
|
|
3820 RuntimeService::record_thread_interrupt_signaled_count();
|
|
3821 }
|
|
3822 }
|
|
3823
|
|
3824
|
|
3825 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
|
|
3826 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
|
|
3827
|
|
3828 OSThread* osthread = thread->osthread();
|
|
3829
|
|
3830 bool res = osthread->interrupted();
|
|
3831
|
|
3832 // NOTE that since there is no "lock" around these two operations,
|
|
3833 // there is the possibility that the interrupted flag will be
|
|
3834 // "false" but that the interrupt event will be set. This is
|
|
3835 // intentional. The effect of this is that Object.wait() will appear
|
|
3836 // to have a spurious wakeup, which is not harmful, and the
|
|
3837 // possibility is so rare that it is not worth the added complexity
|
|
3838 // to add yet another lock. It has also been recommended not to put
|
|
3839 // the interrupted flag into the os::Solaris::Event structure,
|
|
3840 // because it hides the issue.
|
|
3841 if (res && clear_interrupted) {
|
|
3842 osthread->set_interrupted(false);
|
|
3843 }
|
|
3844 return res;
|
|
3845 }
|
|
3846
|
|
3847
|
|
3848 void os::print_statistics() {
|
|
3849 }
|
|
3850
|
|
3851 int os::message_box(const char* title, const char* message) {
|
|
3852 int i;
|
|
3853 fdStream err(defaultStream::error_fd());
|
|
3854 for (i = 0; i < 78; i++) err.print_raw("=");
|
|
3855 err.cr();
|
|
3856 err.print_raw_cr(title);
|
|
3857 for (i = 0; i < 78; i++) err.print_raw("-");
|
|
3858 err.cr();
|
|
3859 err.print_raw_cr(message);
|
|
3860 for (i = 0; i < 78; i++) err.print_raw("=");
|
|
3861 err.cr();
|
|
3862
|
|
3863 char buf[16];
|
|
3864 // Prevent process from exiting upon "read error" without consuming all CPU
|
|
3865 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
|
|
3866
|
|
3867 return buf[0] == 'y' || buf[0] == 'Y';
|
|
3868 }
|
|
3869
|
|
3870 // A lightweight implementation that does not suspend the target thread and
|
|
3871 // thus returns only a hint. Used for profiling only!
|
|
3872 ExtendedPC os::get_thread_pc(Thread* thread) {
|
|
3873 // Make sure that it is called by the watcher and the Threads lock is owned.
|
|
3874 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
|
|
3875 // For now, is only used to profile the VM Thread
|
|
3876 assert(thread->is_VM_thread(), "Can only be called for VMThread");
|
|
3877 ExtendedPC epc;
|
|
3878
|
|
3879 GetThreadPC_Callback cb(ProfileVM_lock);
|
|
3880 OSThread *osthread = thread->osthread();
|
|
3881 const int time_to_wait = 400; // 400ms wait for initial response
|
|
3882 int status = cb.interrupt(thread, time_to_wait);
|
|
3883
|
|
3884 if (cb.is_done() ) {
|
|
3885 epc = cb.addr();
|
|
3886 } else {
|
|
3887 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status",
|
|
3888 osthread->thread_id(), status););
|
|
3889 // epc is already NULL
|
|
3890 }
|
|
3891 return epc;
|
|
3892 }
|
|
3893
|
|
3894
|
|
3895 // This does not do anything on Solaris. This is basically a hook for being
|
|
3896 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
|
|
3897 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
|
|
3898 f(value, method, args, thread);
|
|
3899 }
|
|
3900
|
|
3901 // This routine may be used by user applications as a "hook" to catch signals.
|
|
3902 // The user-defined signal handler must pass unrecognized signals to this
|
|
3903 // routine, and if it returns true (non-zero), then the signal handler must
|
|
3904 // return immediately. If the flag "abort_if_unrecognized" is true, then this
|
|
3905 // routine will never retun false (zero), but instead will execute a VM panic
|
|
3906 // routine kill the process.
|
|
3907 //
|
|
3908 // If this routine returns false, it is OK to call it again. This allows
|
|
3909 // the user-defined signal handler to perform checks either before or after
|
|
3910 // the VM performs its own checks. Naturally, the user code would be making
|
|
3911 // a serious error if it tried to handle an exception (such as a null check
|
|
3912 // or breakpoint) that the VM was generating for its own correct operation.
|
|
3913 //
|
|
3914 // This routine may recognize any of the following kinds of signals:
|
|
3915 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
|
|
3916 // os::Solaris::SIGasync
|
|
3917 // It should be consulted by handlers for any of those signals.
|
|
3918 // It explicitly does not recognize os::Solaris::SIGinterrupt
|
|
3919 //
|
|
3920 // The caller of this routine must pass in the three arguments supplied
|
|
3921 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
|
|
3922 // field of the structure passed to sigaction(). This routine assumes that
|
|
3923 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
|
|
3924 //
|
|
3925 // Note that the VM will print warnings if it detects conflicting signal
|
|
3926 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
|
|
3927 //
|
|
3928 extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized);
|
|
3929
|
|
3930
|
|
3931 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
|
|
3932 JVM_handle_solaris_signal(sig, info, ucVoid, true);
|
|
3933 }
|
|
3934
|
|
3935 /* Do not delete - if guarantee is ever removed, a signal handler (even empty)
|
|
3936 is needed to provoke threads blocked on IO to return an EINTR
|
|
3937 Note: this explicitly does NOT call JVM_handle_solaris_signal and
|
|
3938 does NOT participate in signal chaining due to requirement for
|
|
3939 NOT setting SA_RESTART to make EINTR work. */
|
|
3940 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
|
|
3941 if (UseSignalChaining) {
|
|
3942 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
|
|
3943 if (actp && actp->sa_handler) {
|
|
3944 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
|
|
3945 }
|
|
3946 }
|
|
3947 }
|
|
3948
|
|
3949 // This boolean allows users to forward their own non-matching signals
|
|
3950 // to JVM_handle_solaris_signal, harmlessly.
|
|
3951 bool os::Solaris::signal_handlers_are_installed = false;
|
|
3952
|
|
3953 // For signal-chaining
|
|
3954 bool os::Solaris::libjsig_is_loaded = false;
|
|
3955 typedef struct sigaction *(*get_signal_t)(int);
|
|
3956 get_signal_t os::Solaris::get_signal_action = NULL;
|
|
3957
|
|
3958 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
|
|
3959 struct sigaction *actp = NULL;
|
|
3960
|
|
3961 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
|
|
3962 // Retrieve the old signal handler from libjsig
|
|
3963 actp = (*get_signal_action)(sig);
|
|
3964 }
|
|
3965 if (actp == NULL) {
|
|
3966 // Retrieve the preinstalled signal handler from jvm
|
|
3967 actp = get_preinstalled_handler(sig);
|
|
3968 }
|
|
3969
|
|
3970 return actp;
|
|
3971 }
|
|
3972
|
|
3973 static bool call_chained_handler(struct sigaction *actp, int sig,
|
|
3974 siginfo_t *siginfo, void *context) {
|
|
3975 // Call the old signal handler
|
|
3976 if (actp->sa_handler == SIG_DFL) {
|
|
3977 // It's more reasonable to let jvm treat it as an unexpected exception
|
|
3978 // instead of taking the default action.
|
|
3979 return false;
|
|
3980 } else if (actp->sa_handler != SIG_IGN) {
|
|
3981 if ((actp->sa_flags & SA_NODEFER) == 0) {
|
|
3982 // automaticlly block the signal
|
|
3983 sigaddset(&(actp->sa_mask), sig);
|
|
3984 }
|
|
3985
|
|
3986 sa_handler_t hand;
|
|
3987 sa_sigaction_t sa;
|
|
3988 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
|
|
3989 // retrieve the chained handler
|
|
3990 if (siginfo_flag_set) {
|
|
3991 sa = actp->sa_sigaction;
|
|
3992 } else {
|
|
3993 hand = actp->sa_handler;
|
|
3994 }
|
|
3995
|
|
3996 if ((actp->sa_flags & SA_RESETHAND) != 0) {
|
|
3997 actp->sa_handler = SIG_DFL;
|
|
3998 }
|
|
3999
|
|
4000 // try to honor the signal mask
|
|
4001 sigset_t oset;
|
|
4002 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
|
|
4003
|
|
4004 // call into the chained handler
|
|
4005 if (siginfo_flag_set) {
|
|
4006 (*sa)(sig, siginfo, context);
|
|
4007 } else {
|
|
4008 (*hand)(sig);
|
|
4009 }
|
|
4010
|
|
4011 // restore the signal mask
|
|
4012 thr_sigsetmask(SIG_SETMASK, &oset, 0);
|
|
4013 }
|
|
4014 // Tell jvm's signal handler the signal is taken care of.
|
|
4015 return true;
|
|
4016 }
|
|
4017
|
|
4018 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
|
|
4019 bool chained = false;
|
|
4020 // signal-chaining
|
|
4021 if (UseSignalChaining) {
|
|
4022 struct sigaction *actp = get_chained_signal_action(sig);
|
|
4023 if (actp != NULL) {
|
|
4024 chained = call_chained_handler(actp, sig, siginfo, context);
|
|
4025 }
|
|
4026 }
|
|
4027 return chained;
|
|
4028 }
|
|
4029
|
|
4030 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
|
|
4031 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
|
|
4032 if (preinstalled_sigs[sig] != 0) {
|
|
4033 return &chainedsigactions[sig];
|
|
4034 }
|
|
4035 return NULL;
|
|
4036 }
|
|
4037
|
|
4038 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
|
|
4039
|
|
4040 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
|
|
4041 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
|
|
4042 chainedsigactions[sig] = oldAct;
|
|
4043 preinstalled_sigs[sig] = 1;
|
|
4044 }
|
|
4045
|
|
4046 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) {
|
|
4047 // Check for overwrite.
|
|
4048 struct sigaction oldAct;
|
|
4049 sigaction(sig, (struct sigaction*)NULL, &oldAct);
|
|
4050 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
|
|
4051 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
|
|
4052 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
|
|
4053 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
|
|
4054 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
|
|
4055 if (AllowUserSignalHandlers || !set_installed) {
|
|
4056 // Do not overwrite; user takes responsibility to forward to us.
|
|
4057 return;
|
|
4058 } else if (UseSignalChaining) {
|
|
4059 if (oktochain) {
|
|
4060 // save the old handler in jvm
|
|
4061 save_preinstalled_handler(sig, oldAct);
|
|
4062 } else {
|
|
4063 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
|
|
4064 }
|
|
4065 // libjsig also interposes the sigaction() call below and saves the
|
|
4066 // old sigaction on it own.
|
|
4067 } else {
|
|
4068 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig);
|
|
4069 }
|
|
4070 }
|
|
4071
|
|
4072 struct sigaction sigAct;
|
|
4073 sigfillset(&(sigAct.sa_mask));
|
|
4074 sigAct.sa_handler = SIG_DFL;
|
|
4075
|
|
4076 sigAct.sa_sigaction = signalHandler;
|
|
4077 // Handle SIGSEGV on alternate signal stack if
|
|
4078 // not using stack banging
|
|
4079 if (!UseStackBanging && sig == SIGSEGV) {
|
|
4080 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
|
|
4081 // Interruptible i/o requires SA_RESTART cleared so EINTR
|
|
4082 // is returned instead of restarting system calls
|
|
4083 } else if (sig == os::Solaris::SIGinterrupt()) {
|
|
4084 sigemptyset(&sigAct.sa_mask);
|
|
4085 sigAct.sa_handler = NULL;
|
|
4086 sigAct.sa_flags = SA_SIGINFO;
|
|
4087 sigAct.sa_sigaction = sigINTRHandler;
|
|
4088 } else {
|
|
4089 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
|
|
4090 }
|
|
4091 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
|
|
4092
|
|
4093 sigaction(sig, &sigAct, &oldAct);
|
|
4094
|
|
4095 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
|
|
4096 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
|
|
4097 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
|
|
4098 }
|
|
4099
|
|
4100
|
|
4101 #define DO_SIGNAL_CHECK(sig) \
|
|
4102 if (!sigismember(&check_signal_done, sig)) \
|
|
4103 os::Solaris::check_signal_handler(sig)
|
|
4104
|
|
4105 // This method is a periodic task to check for misbehaving JNI applications
|
|
4106 // under CheckJNI, we can add any periodic checks here
|
|
4107
|
|
4108 void os::run_periodic_checks() {
|
|
4109 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
|
|
4110 // thereby preventing a NULL checks.
|
|
4111 if(!check_addr0_done) check_addr0_done = check_addr0(tty);
|
|
4112
|
|
4113 if (check_signals == false) return;
|
|
4114
|
|
4115 // SEGV and BUS if overridden could potentially prevent
|
|
4116 // generation of hs*.log in the event of a crash, debugging
|
|
4117 // such a case can be very challenging, so we absolutely
|
|
4118 // check for the following for a good measure:
|
|
4119 DO_SIGNAL_CHECK(SIGSEGV);
|
|
4120 DO_SIGNAL_CHECK(SIGILL);
|
|
4121 DO_SIGNAL_CHECK(SIGFPE);
|
|
4122 DO_SIGNAL_CHECK(SIGBUS);
|
|
4123 DO_SIGNAL_CHECK(SIGPIPE);
|
|
4124 DO_SIGNAL_CHECK(SIGXFSZ);
|
|
4125
|
|
4126 // ReduceSignalUsage allows the user to override these handlers
|
|
4127 // see comments at the very top and jvm_solaris.h
|
|
4128 if (!ReduceSignalUsage) {
|
|
4129 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
|
|
4130 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
|
|
4131 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
|
|
4132 DO_SIGNAL_CHECK(BREAK_SIGNAL);
|
|
4133 }
|
|
4134
|
|
4135 // See comments above for using JVM1/JVM2 and UseAltSigs
|
|
4136 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
|
|
4137 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
|
|
4138
|
|
4139 }
|
|
4140
|
|
4141 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
|
|
4142
|
|
4143 static os_sigaction_t os_sigaction = NULL;
|
|
4144
|
|
4145 void os::Solaris::check_signal_handler(int sig) {
|
|
4146 char buf[O_BUFLEN];
|
|
4147 address jvmHandler = NULL;
|
|
4148
|
|
4149 struct sigaction act;
|
|
4150 if (os_sigaction == NULL) {
|
|
4151 // only trust the default sigaction, in case it has been interposed
|
|
4152 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
|
|
4153 if (os_sigaction == NULL) return;
|
|
4154 }
|
|
4155
|
|
4156 os_sigaction(sig, (struct sigaction*)NULL, &act);
|
|
4157
|
|
4158 address thisHandler = (act.sa_flags & SA_SIGINFO)
|
|
4159 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
|
|
4160 : CAST_FROM_FN_PTR(address, act.sa_handler) ;
|
|
4161
|
|
4162
|
|
4163 switch(sig) {
|
|
4164 case SIGSEGV:
|
|
4165 case SIGBUS:
|
|
4166 case SIGFPE:
|
|
4167 case SIGPIPE:
|
|
4168 case SIGXFSZ:
|
|
4169 case SIGILL:
|
|
4170 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
|
|
4171 break;
|
|
4172
|
|
4173 case SHUTDOWN1_SIGNAL:
|
|
4174 case SHUTDOWN2_SIGNAL:
|
|
4175 case SHUTDOWN3_SIGNAL:
|
|
4176 case BREAK_SIGNAL:
|
|
4177 jvmHandler = (address)user_handler();
|
|
4178 break;
|
|
4179
|
|
4180 default:
|
|
4181 int intrsig = os::Solaris::SIGinterrupt();
|
|
4182 int asynsig = os::Solaris::SIGasync();
|
|
4183
|
|
4184 if (sig == intrsig) {
|
|
4185 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
|
|
4186 } else if (sig == asynsig) {
|
|
4187 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
|
|
4188 } else {
|
|
4189 return;
|
|
4190 }
|
|
4191 break;
|
|
4192 }
|
|
4193
|
|
4194
|
|
4195 if (thisHandler != jvmHandler) {
|
|
4196 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
|
|
4197 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
|
|
4198 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
|
|
4199 // No need to check this sig any longer
|
|
4200 sigaddset(&check_signal_done, sig);
|
|
4201 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
|
|
4202 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
|
|
4203 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
|
|
4204 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
|
|
4205 // No need to check this sig any longer
|
|
4206 sigaddset(&check_signal_done, sig);
|
|
4207 }
|
|
4208
|
|
4209 // Print all the signal handler state
|
|
4210 if (sigismember(&check_signal_done, sig)) {
|
|
4211 print_signal_handlers(tty, buf, O_BUFLEN);
|
|
4212 }
|
|
4213
|
|
4214 }
|
|
4215
|
|
4216 void os::Solaris::install_signal_handlers() {
|
|
4217 bool libjsigdone = false;
|
|
4218 signal_handlers_are_installed = true;
|
|
4219
|
|
4220 // signal-chaining
|
|
4221 typedef void (*signal_setting_t)();
|
|
4222 signal_setting_t begin_signal_setting = NULL;
|
|
4223 signal_setting_t end_signal_setting = NULL;
|
|
4224 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
|
|
4225 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
|
|
4226 if (begin_signal_setting != NULL) {
|
|
4227 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
|
|
4228 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
|
|
4229 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
|
|
4230 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
|
|
4231 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
|
|
4232 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
|
|
4233 libjsig_is_loaded = true;
|
|
4234 if (os::Solaris::get_libjsig_version != NULL) {
|
|
4235 libjsigversion = (*os::Solaris::get_libjsig_version)();
|
|
4236 }
|
|
4237 assert(UseSignalChaining, "should enable signal-chaining");
|
|
4238 }
|
|
4239 if (libjsig_is_loaded) {
|
|
4240 // Tell libjsig jvm is setting signal handlers
|
|
4241 (*begin_signal_setting)();
|
|
4242 }
|
|
4243
|
|
4244 set_signal_handler(SIGSEGV, true, true);
|
|
4245 set_signal_handler(SIGPIPE, true, true);
|
|
4246 set_signal_handler(SIGXFSZ, true, true);
|
|
4247 set_signal_handler(SIGBUS, true, true);
|
|
4248 set_signal_handler(SIGILL, true, true);
|
|
4249 set_signal_handler(SIGFPE, true, true);
|
|
4250
|
|
4251
|
|
4252 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
|
|
4253
|
|
4254 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
|
|
4255 // can not register overridable signals which might be > 32
|
|
4256 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
|
|
4257 // Tell libjsig jvm has finished setting signal handlers
|
|
4258 (*end_signal_setting)();
|
|
4259 libjsigdone = true;
|
|
4260 }
|
|
4261 }
|
|
4262
|
|
4263 // Never ok to chain our SIGinterrupt
|
|
4264 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
|
|
4265 set_signal_handler(os::Solaris::SIGasync(), true, true);
|
|
4266
|
|
4267 if (libjsig_is_loaded && !libjsigdone) {
|
|
4268 // Tell libjsig jvm finishes setting signal handlers
|
|
4269 (*end_signal_setting)();
|
|
4270 }
|
|
4271
|
|
4272 // We don't activate signal checker if libjsig is in place, we trust ourselves
|
|
4273 // and if UserSignalHandler is installed all bets are off
|
|
4274 if (CheckJNICalls) {
|
|
4275 if (libjsig_is_loaded) {
|
|
4276 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
|
|
4277 check_signals = false;
|
|
4278 }
|
|
4279 if (AllowUserSignalHandlers) {
|
|
4280 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
|
|
4281 check_signals = false;
|
|
4282 }
|
|
4283 }
|
|
4284 }
|
|
4285
|
|
4286
|
|
4287 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...);
|
|
4288
|
|
4289 const char * signames[] = {
|
|
4290 "SIG0",
|
|
4291 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
|
|
4292 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
|
|
4293 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
|
|
4294 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
|
|
4295 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
|
|
4296 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
|
|
4297 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
|
|
4298 "SIGCANCEL", "SIGLOST"
|
|
4299 };
|
|
4300
|
|
4301 const char* os::exception_name(int exception_code, char* buf, size_t size) {
|
|
4302 if (0 < exception_code && exception_code <= SIGRTMAX) {
|
|
4303 // signal
|
|
4304 if (exception_code < sizeof(signames)/sizeof(const char*)) {
|
|
4305 jio_snprintf(buf, size, "%s", signames[exception_code]);
|
|
4306 } else {
|
|
4307 jio_snprintf(buf, size, "SIG%d", exception_code);
|
|
4308 }
|
|
4309 return buf;
|
|
4310 } else {
|
|
4311 return NULL;
|
|
4312 }
|
|
4313 }
|
|
4314
|
|
4315 // (Static) wrappers for the new libthread API
|
|
4316 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate;
|
|
4317 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate;
|
|
4318 int_fnP_thread_t_i os::Solaris::_thr_setmutator;
|
|
4319 int_fnP_thread_t os::Solaris::_thr_suspend_mutator;
|
|
4320 int_fnP_thread_t os::Solaris::_thr_continue_mutator;
|
|
4321
|
|
4322 // (Static) wrappers for the liblgrp API
|
|
4323 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
|
|
4324 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
|
|
4325 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
|
|
4326 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
|
|
4327 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
|
|
4328 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
|
|
4329 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
|
|
4330 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
|
|
4331
|
|
4332 // (Static) wrapper for meminfo() call.
|
|
4333 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
|
|
4334
|
|
4335 static address resolve_symbol(const char *name) {
|
|
4336 address addr;
|
|
4337
|
|
4338 addr = (address) dlsym(RTLD_DEFAULT, name);
|
|
4339 if(addr == NULL) {
|
|
4340 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
|
|
4341 addr = (address) dlsym(RTLD_NEXT, name);
|
|
4342 if(addr == NULL) {
|
|
4343 fatal(dlerror());
|
|
4344 }
|
|
4345 }
|
|
4346 return addr;
|
|
4347 }
|
|
4348
|
|
4349
|
|
4350
|
|
4351 // isT2_libthread()
|
|
4352 //
|
|
4353 // Routine to determine if we are currently using the new T2 libthread.
|
|
4354 //
|
|
4355 // We determine if we are using T2 by reading /proc/self/lstatus and
|
|
4356 // looking for a thread with the ASLWP bit set. If we find this status
|
|
4357 // bit set, we must assume that we are NOT using T2. The T2 team
|
|
4358 // has approved this algorithm.
|
|
4359 //
|
|
4360 // We need to determine if we are running with the new T2 libthread
|
|
4361 // since setting native thread priorities is handled differently
|
|
4362 // when using this library. All threads created using T2 are bound
|
|
4363 // threads. Calling thr_setprio is meaningless in this case.
|
|
4364 //
|
|
4365 bool isT2_libthread() {
|
|
4366 int i, rslt;
|
|
4367 static prheader_t * lwpArray = NULL;
|
|
4368 static int lwpSize = 0;
|
|
4369 static int lwpFile = -1;
|
|
4370 lwpstatus_t * that;
|
|
4371 int aslwpcount;
|
|
4372 char lwpName [128];
|
|
4373 bool isT2 = false;
|
|
4374
|
|
4375 #define ADR(x) ((uintptr_t)(x))
|
|
4376 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1))))
|
|
4377
|
|
4378 aslwpcount = 0;
|
|
4379 lwpSize = 16*1024;
|
|
4380 lwpArray = ( prheader_t *)NEW_C_HEAP_ARRAY (char, lwpSize);
|
|
4381 lwpFile = open ("/proc/self/lstatus", O_RDONLY, 0);
|
|
4382 if (lwpArray == NULL) {
|
|
4383 if ( ThreadPriorityVerbose ) warning ("Couldn't allocate T2 Check array\n");
|
|
4384 return(isT2);
|
|
4385 }
|
|
4386 if (lwpFile < 0) {
|
|
4387 if ( ThreadPriorityVerbose ) warning ("Couldn't open /proc/self/lstatus\n");
|
|
4388 return(isT2);
|
|
4389 }
|
|
4390 for (;;) {
|
|
4391 lseek (lwpFile, 0, SEEK_SET);
|
|
4392 rslt = read (lwpFile, lwpArray, lwpSize);
|
|
4393 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) {
|
|
4394 break;
|
|
4395 }
|
|
4396 FREE_C_HEAP_ARRAY(char, lwpArray);
|
|
4397 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize;
|
|
4398 lwpArray = ( prheader_t *)NEW_C_HEAP_ARRAY (char, lwpSize);
|
|
4399 if (lwpArray == NULL) {
|
|
4400 if ( ThreadPriorityVerbose ) warning ("Couldn't allocate T2 Check array\n");
|
|
4401 return(isT2);
|
|
4402 }
|
|
4403 }
|
|
4404
|
|
4405 // We got a good snapshot - now iterate over the list.
|
|
4406 for (i = 0; i < lwpArray->pr_nent; i++ ) {
|
|
4407 that = LWPINDEX(lwpArray,i);
|
|
4408 if (that->pr_flags & PR_ASLWP) {
|
|
4409 aslwpcount++;
|
|
4410 }
|
|
4411 }
|
|
4412 if ( aslwpcount == 0 ) isT2 = true;
|
|
4413
|
|
4414 FREE_C_HEAP_ARRAY(char, lwpArray);
|
|
4415 close (lwpFile);
|
|
4416 if ( ThreadPriorityVerbose ) {
|
|
4417 if ( isT2 ) tty->print_cr("We are running with a T2 libthread\n");
|
|
4418 else tty->print_cr("We are not running with a T2 libthread\n");
|
|
4419 }
|
|
4420 return (isT2);
|
|
4421 }
|
|
4422
|
|
4423
|
|
4424 void os::Solaris::libthread_init() {
|
|
4425 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
|
|
4426
|
|
4427 // Determine if we are running with the new T2 libthread
|
|
4428 os::Solaris::set_T2_libthread(isT2_libthread());
|
|
4429
|
|
4430 lwp_priocntl_init();
|
|
4431
|
|
4432 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
|
|
4433 if(func == NULL) {
|
|
4434 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
|
|
4435 // Guarantee that this VM is running on an new enough OS (5.6 or
|
|
4436 // later) that it will have a new enough libthread.so.
|
|
4437 guarantee(func != NULL, "libthread.so is too old.");
|
|
4438 }
|
|
4439
|
|
4440 // Initialize the new libthread getstate API wrappers
|
|
4441 func = resolve_symbol("thr_getstate");
|
|
4442 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func));
|
|
4443
|
|
4444 func = resolve_symbol("thr_setstate");
|
|
4445 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func));
|
|
4446
|
|
4447 func = resolve_symbol("thr_setmutator");
|
|
4448 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func));
|
|
4449
|
|
4450 func = resolve_symbol("thr_suspend_mutator");
|
|
4451 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
|
|
4452
|
|
4453 func = resolve_symbol("thr_continue_mutator");
|
|
4454 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
|
|
4455
|
|
4456 int size;
|
|
4457 void (*handler_info_func)(address *, int *);
|
|
4458 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
|
|
4459 handler_info_func(&handler_start, &size);
|
|
4460 handler_end = handler_start + size;
|
|
4461 }
|
|
4462
|
|
4463
|
|
4464 int_fnP_mutex_tP os::Solaris::_mutex_lock;
|
|
4465 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
|
|
4466 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
|
|
4467 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
|
|
4468 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
|
|
4469 int os::Solaris::_mutex_scope = USYNC_THREAD;
|
|
4470
|
|
4471 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
|
|
4472 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
|
|
4473 int_fnP_cond_tP os::Solaris::_cond_signal;
|
|
4474 int_fnP_cond_tP os::Solaris::_cond_broadcast;
|
|
4475 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
|
|
4476 int_fnP_cond_tP os::Solaris::_cond_destroy;
|
|
4477 int os::Solaris::_cond_scope = USYNC_THREAD;
|
|
4478
|
|
4479 void os::Solaris::synchronization_init() {
|
|
4480 if(UseLWPSynchronization) {
|
|
4481 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
|
|
4482 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
|
|
4483 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
|
|
4484 os::Solaris::set_mutex_init(lwp_mutex_init);
|
|
4485 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
|
|
4486 os::Solaris::set_mutex_scope(USYNC_THREAD);
|
|
4487
|
|
4488 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
|
|
4489 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
|
|
4490 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
|
|
4491 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
|
|
4492 os::Solaris::set_cond_init(lwp_cond_init);
|
|
4493 os::Solaris::set_cond_destroy(lwp_cond_destroy);
|
|
4494 os::Solaris::set_cond_scope(USYNC_THREAD);
|
|
4495 }
|
|
4496 else {
|
|
4497 os::Solaris::set_mutex_scope(USYNC_THREAD);
|
|
4498 os::Solaris::set_cond_scope(USYNC_THREAD);
|
|
4499
|
|
4500 if(UsePthreads) {
|
|
4501 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
|
|
4502 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
|
|
4503 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
|
|
4504 os::Solaris::set_mutex_init(pthread_mutex_default_init);
|
|
4505 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
|
|
4506
|
|
4507 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
|
|
4508 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
|
|
4509 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
|
|
4510 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
|
|
4511 os::Solaris::set_cond_init(pthread_cond_default_init);
|
|
4512 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
|
|
4513 }
|
|
4514 else {
|
|
4515 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
|
|
4516 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
|
|
4517 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
|
|
4518 os::Solaris::set_mutex_init(::mutex_init);
|
|
4519 os::Solaris::set_mutex_destroy(::mutex_destroy);
|
|
4520
|
|
4521 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
|
|
4522 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
|
|
4523 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
|
|
4524 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
|
|
4525 os::Solaris::set_cond_init(::cond_init);
|
|
4526 os::Solaris::set_cond_destroy(::cond_destroy);
|
|
4527 }
|
|
4528 }
|
|
4529 }
|
|
4530
|
|
4531 void os::Solaris::liblgrp_init() {
|
|
4532 void *handle = dlopen("liblgrp.so", RTLD_LAZY);
|
|
4533 if (handle != NULL) {
|
|
4534 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
|
|
4535 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
|
|
4536 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
|
|
4537 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
|
|
4538 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
|
|
4539 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
|
|
4540 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
|
|
4541 dlsym(handle, "lgrp_cookie_stale")));
|
|
4542
|
|
4543 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
|
|
4544 set_lgrp_cookie(c);
|
|
4545 } else {
|
|
4546 warning("your OS does not support NUMA");
|
|
4547 }
|
|
4548 }
|
|
4549
|
|
4550 void os::Solaris::misc_sym_init() {
|
|
4551 address func = (address)dlsym(RTLD_DEFAULT, "meminfo");
|
|
4552 if(func == NULL) {
|
|
4553 func = (address) dlsym(RTLD_NEXT, "meminfo");
|
|
4554 }
|
|
4555 if (func != NULL) {
|
|
4556 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
|
|
4557 }
|
|
4558 }
|
|
4559
|
|
4560 // Symbol doesn't exist in Solaris 8 pset.h
|
|
4561 #ifndef PS_MYID
|
|
4562 #define PS_MYID -3
|
|
4563 #endif
|
|
4564
|
|
4565 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
|
|
4566 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
|
|
4567 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
|
|
4568
|
|
4569 void init_pset_getloadavg_ptr(void) {
|
|
4570 pset_getloadavg_ptr =
|
|
4571 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
|
|
4572 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
|
|
4573 warning("pset_getloadavg function not found");
|
|
4574 }
|
|
4575 }
|
|
4576
|
|
4577 int os::Solaris::_dev_zero_fd = -1;
|
|
4578
|
|
4579 // this is called _before_ the global arguments have been parsed
|
|
4580 void os::init(void) {
|
|
4581 _initial_pid = getpid();
|
|
4582
|
|
4583 max_hrtime = first_hrtime = gethrtime();
|
|
4584
|
|
4585 init_random(1234567);
|
|
4586
|
|
4587 page_size = sysconf(_SC_PAGESIZE);
|
|
4588 if (page_size == -1)
|
|
4589 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno));
|
|
4590 init_page_sizes((size_t) page_size);
|
|
4591
|
|
4592 Solaris::initialize_system_info();
|
|
4593
|
|
4594 int fd = open("/dev/zero", O_RDWR);
|
|
4595 if (fd < 0) {
|
|
4596 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno));
|
|
4597 } else {
|
|
4598 Solaris::set_dev_zero_fd(fd);
|
|
4599
|
|
4600 // Close on exec, child won't inherit.
|
|
4601 fcntl(fd, F_SETFD, FD_CLOEXEC);
|
|
4602 }
|
|
4603
|
|
4604 clock_tics_per_sec = CLK_TCK;
|
|
4605
|
|
4606 // check if dladdr1() exists; dladdr1 can provide more information than
|
|
4607 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
|
|
4608 // and is available on linker patches for 5.7 and 5.8.
|
|
4609 // libdl.so must have been loaded, this call is just an entry lookup
|
|
4610 void * hdl = dlopen("libdl.so", RTLD_NOW);
|
|
4611 if (hdl)
|
|
4612 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
|
|
4613
|
|
4614 // (Solaris only) this switches to calls that actually do locking.
|
|
4615 ThreadCritical::initialize();
|
|
4616
|
|
4617 main_thread = thr_self();
|
|
4618
|
|
4619 // Constant minimum stack size allowed. It must be at least
|
|
4620 // the minimum of what the OS supports (thr_min_stack()), and
|
|
4621 // enough to allow the thread to get to user bytecode execution.
|
|
4622 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
|
|
4623 // If the pagesize of the VM is greater than 8K determine the appropriate
|
|
4624 // number of initial guard pages. The user can change this with the
|
|
4625 // command line arguments, if needed.
|
|
4626 if (vm_page_size() > 8*K) {
|
|
4627 StackYellowPages = 1;
|
|
4628 StackRedPages = 1;
|
|
4629 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
|
|
4630 }
|
|
4631 }
|
|
4632
|
|
4633 // To install functions for atexit system call
|
|
4634 extern "C" {
|
|
4635 static void perfMemory_exit_helper() {
|
|
4636 perfMemory_exit();
|
|
4637 }
|
|
4638 }
|
|
4639
|
|
4640 // this is called _after_ the global arguments have been parsed
|
|
4641 jint os::init_2(void) {
|
|
4642 // try to enable extended file IO ASAP, see 6431278
|
|
4643 os::Solaris::try_enable_extended_io();
|
|
4644
|
|
4645 // Allocate a single page and mark it as readable for safepoint polling. Also
|
|
4646 // use this first mmap call to check support for MAP_ALIGN.
|
|
4647 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
|
|
4648 page_size,
|
|
4649 MAP_PRIVATE | MAP_ALIGN,
|
|
4650 PROT_READ);
|
|
4651 if (polling_page == NULL) {
|
|
4652 has_map_align = false;
|
|
4653 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
|
|
4654 PROT_READ);
|
|
4655 }
|
|
4656
|
|
4657 os::set_polling_page(polling_page);
|
|
4658
|
|
4659 #ifndef PRODUCT
|
|
4660 if( Verbose && PrintMiscellaneous )
|
|
4661 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
|
|
4662 #endif
|
|
4663
|
|
4664 if (!UseMembar) {
|
|
4665 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE );
|
|
4666 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page");
|
|
4667 os::set_memory_serialize_page( mem_serialize_page );
|
|
4668
|
|
4669 #ifndef PRODUCT
|
|
4670 if(Verbose && PrintMiscellaneous)
|
|
4671 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
|
|
4672 #endif
|
|
4673 }
|
|
4674
|
|
4675 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init());
|
|
4676
|
|
4677 // Check minimum allowable stack size for thread creation and to initialize
|
|
4678 // the java system classes, including StackOverflowError - depends on page
|
|
4679 // size. Add a page for compiler2 recursion in main thread.
|
|
4680 // Add in BytesPerWord times page size to account for VM stack during
|
|
4681 // class initialization depending on 32 or 64 bit VM.
|
|
4682 guarantee((Solaris::min_stack_allowed >=
|
|
4683 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord
|
|
4684 COMPILER2_PRESENT(+1)) * page_size),
|
|
4685 "need to increase Solaris::min_stack_allowed on this platform");
|
|
4686
|
|
4687 size_t threadStackSizeInBytes = ThreadStackSize * K;
|
|
4688 if (threadStackSizeInBytes != 0 &&
|
|
4689 threadStackSizeInBytes < Solaris::min_stack_allowed) {
|
|
4690 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
|
|
4691 Solaris::min_stack_allowed/K);
|
|
4692 return JNI_ERR;
|
|
4693 }
|
|
4694
|
|
4695 // For 64kbps there will be a 64kb page size, which makes
|
|
4696 // the usable default stack size quite a bit less. Increase the
|
|
4697 // stack for 64kb (or any > than 8kb) pages, this increases
|
|
4698 // virtual memory fragmentation (since we're not creating the
|
|
4699 // stack on a power of 2 boundary. The real fix for this
|
|
4700 // should be to fix the guard page mechanism.
|
|
4701
|
|
4702 if (vm_page_size() > 8*K) {
|
|
4703 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
|
|
4704 ? threadStackSizeInBytes +
|
|
4705 ((StackYellowPages + StackRedPages) * vm_page_size())
|
|
4706 : 0;
|
|
4707 ThreadStackSize = threadStackSizeInBytes/K;
|
|
4708 }
|
|
4709
|
|
4710 // Make the stack size a multiple of the page size so that
|
|
4711 // the yellow/red zones can be guarded.
|
|
4712 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
|
|
4713 vm_page_size()));
|
|
4714
|
|
4715 Solaris::libthread_init();
|
|
4716 if (UseNUMA) {
|
|
4717 Solaris::liblgrp_init();
|
|
4718 }
|
|
4719 Solaris::misc_sym_init();
|
|
4720 Solaris::signal_sets_init();
|
|
4721 Solaris::init_signal_mem();
|
|
4722 Solaris::install_signal_handlers();
|
|
4723
|
|
4724 if (libjsigversion < JSIG_VERSION_1_4_1) {
|
|
4725 Maxlibjsigsigs = OLDMAXSIGNUM;
|
|
4726 }
|
|
4727
|
|
4728 // initialize synchronization primitives to use either thread or
|
|
4729 // lwp synchronization (controlled by UseLWPSynchronization)
|
|
4730 Solaris::synchronization_init();
|
|
4731
|
|
4732 if (MaxFDLimit) {
|
|
4733 // set the number of file descriptors to max. print out error
|
|
4734 // if getrlimit/setrlimit fails but continue regardless.
|
|
4735 struct rlimit nbr_files;
|
|
4736 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
|
|
4737 if (status != 0) {
|
|
4738 if (PrintMiscellaneous && (Verbose || WizardMode))
|
|
4739 perror("os::init_2 getrlimit failed");
|
|
4740 } else {
|
|
4741 nbr_files.rlim_cur = nbr_files.rlim_max;
|
|
4742 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
|
|
4743 if (status != 0) {
|
|
4744 if (PrintMiscellaneous && (Verbose || WizardMode))
|
|
4745 perror("os::init_2 setrlimit failed");
|
|
4746 }
|
|
4747 }
|
|
4748 }
|
|
4749
|
|
4750 // Initialize HPI.
|
|
4751 jint hpi_result = hpi::initialize();
|
|
4752 if (hpi_result != JNI_OK) {
|
|
4753 tty->print_cr("There was an error trying to initialize the HPI library.");
|
|
4754 return hpi_result;
|
|
4755 }
|
|
4756
|
|
4757 // Calculate theoretical max. size of Threads to guard gainst
|
|
4758 // artifical out-of-memory situations, where all available address-
|
|
4759 // space has been reserved by thread stacks. Default stack size is 1Mb.
|
|
4760 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
|
|
4761 JavaThread::stack_size_at_create() : (1*K*K);
|
|
4762 assert(pre_thread_stack_size != 0, "Must have a stack");
|
|
4763 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
|
|
4764 // we should start doing Virtual Memory banging. Currently when the threads will
|
|
4765 // have used all but 200Mb of space.
|
|
4766 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
|
|
4767 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
|
|
4768
|
|
4769 // at-exit methods are called in the reverse order of their registration.
|
|
4770 // In Solaris 7 and earlier, atexit functions are called on return from
|
|
4771 // main or as a result of a call to exit(3C). There can be only 32 of
|
|
4772 // these functions registered and atexit() does not set errno. In Solaris
|
|
4773 // 8 and later, there is no limit to the number of functions registered
|
|
4774 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
|
|
4775 // functions are called upon dlclose(3DL) in addition to return from main
|
|
4776 // and exit(3C).
|
|
4777
|
|
4778 if (PerfAllowAtExitRegistration) {
|
|
4779 // only register atexit functions if PerfAllowAtExitRegistration is set.
|
|
4780 // atexit functions can be delayed until process exit time, which
|
|
4781 // can be problematic for embedded VM situations. Embedded VMs should
|
|
4782 // call DestroyJavaVM() to assure that VM resources are released.
|
|
4783
|
|
4784 // note: perfMemory_exit_helper atexit function may be removed in
|
|
4785 // the future if the appropriate cleanup code can be added to the
|
|
4786 // VM_Exit VMOperation's doit method.
|
|
4787 if (atexit(perfMemory_exit_helper) != 0) {
|
|
4788 warning("os::init2 atexit(perfMemory_exit_helper) failed");
|
|
4789 }
|
|
4790 }
|
|
4791
|
|
4792 // Init pset_loadavg function pointer
|
|
4793 init_pset_getloadavg_ptr();
|
|
4794
|
|
4795 return JNI_OK;
|
|
4796 }
|
|
4797
|
|
4798
|
|
4799 // Mark the polling page as unreadable
|
|
4800 void os::make_polling_page_unreadable(void) {
|
|
4801 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 )
|
|
4802 fatal("Could not disable polling page");
|
|
4803 };
|
|
4804
|
|
4805 // Mark the polling page as readable
|
|
4806 void os::make_polling_page_readable(void) {
|
|
4807 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 )
|
|
4808 fatal("Could not enable polling page");
|
|
4809 };
|
|
4810
|
|
4811 // OS interface.
|
|
4812
|
|
4813 int os::stat(const char *path, struct stat *sbuf) {
|
|
4814 char pathbuf[MAX_PATH];
|
|
4815 if (strlen(path) > MAX_PATH - 1) {
|
|
4816 errno = ENAMETOOLONG;
|
|
4817 return -1;
|
|
4818 }
|
|
4819 hpi::native_path(strcpy(pathbuf, path));
|
|
4820 return ::stat(pathbuf, sbuf);
|
|
4821 }
|
|
4822
|
|
4823
|
|
4824 bool os::check_heap(bool force) { return true; }
|
|
4825
|
|
4826 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr);
|
|
4827 static vsnprintf_t sol_vsnprintf = NULL;
|
|
4828
|
|
4829 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
|
|
4830 if (!sol_vsnprintf) {
|
|
4831 //search for the named symbol in the objects that were loaded after libjvm
|
|
4832 void* where = RTLD_NEXT;
|
|
4833 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
|
|
4834 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
|
|
4835 if (!sol_vsnprintf){
|
|
4836 //search for the named symbol in the objects that were loaded before libjvm
|
|
4837 where = RTLD_DEFAULT;
|
|
4838 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
|
|
4839 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
|
|
4840 assert(sol_vsnprintf != NULL, "vsnprintf not found");
|
|
4841 }
|
|
4842 }
|
|
4843 return (*sol_vsnprintf)(buf, count, fmt, argptr);
|
|
4844 }
|
|
4845
|
|
4846
|
|
4847 // Is a (classpath) directory empty?
|
|
4848 bool os::dir_is_empty(const char* path) {
|
|
4849 DIR *dir = NULL;
|
|
4850 struct dirent *ptr;
|
|
4851
|
|
4852 dir = opendir(path);
|
|
4853 if (dir == NULL) return true;
|
|
4854
|
|
4855 /* Scan the directory */
|
|
4856 bool result = true;
|
|
4857 char buf[sizeof(struct dirent) + MAX_PATH];
|
|
4858 struct dirent *dbuf = (struct dirent *) buf;
|
|
4859 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
|
|
4860 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
|
|
4861 result = false;
|
|
4862 }
|
|
4863 }
|
|
4864 closedir(dir);
|
|
4865 return result;
|
|
4866 }
|
|
4867
|
|
4868 // create binary file, rewriting existing file if required
|
|
4869 int os::create_binary_file(const char* path, bool rewrite_existing) {
|
|
4870 int oflags = O_WRONLY | O_CREAT;
|
|
4871 if (!rewrite_existing) {
|
|
4872 oflags |= O_EXCL;
|
|
4873 }
|
|
4874 return ::open64(path, oflags, S_IREAD | S_IWRITE);
|
|
4875 }
|
|
4876
|
|
4877 // return current position of file pointer
|
|
4878 jlong os::current_file_offset(int fd) {
|
|
4879 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
|
|
4880 }
|
|
4881
|
|
4882 // move file pointer to the specified offset
|
|
4883 jlong os::seek_to_file_offset(int fd, jlong offset) {
|
|
4884 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
|
|
4885 }
|
|
4886
|
|
4887 // Map a block of memory.
|
|
4888 char* os::map_memory(int fd, const char* file_name, size_t file_offset,
|
|
4889 char *addr, size_t bytes, bool read_only,
|
|
4890 bool allow_exec) {
|
|
4891 int prot;
|
|
4892 int flags;
|
|
4893
|
|
4894 if (read_only) {
|
|
4895 prot = PROT_READ;
|
|
4896 flags = MAP_SHARED;
|
|
4897 } else {
|
|
4898 prot = PROT_READ | PROT_WRITE;
|
|
4899 flags = MAP_PRIVATE;
|
|
4900 }
|
|
4901
|
|
4902 if (allow_exec) {
|
|
4903 prot |= PROT_EXEC;
|
|
4904 }
|
|
4905
|
|
4906 if (addr != NULL) {
|
|
4907 flags |= MAP_FIXED;
|
|
4908 }
|
|
4909
|
|
4910 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
|
|
4911 fd, file_offset);
|
|
4912 if (mapped_address == MAP_FAILED) {
|
|
4913 return NULL;
|
|
4914 }
|
|
4915 return mapped_address;
|
|
4916 }
|
|
4917
|
|
4918
|
|
4919 // Remap a block of memory.
|
|
4920 char* os::remap_memory(int fd, const char* file_name, size_t file_offset,
|
|
4921 char *addr, size_t bytes, bool read_only,
|
|
4922 bool allow_exec) {
|
|
4923 // same as map_memory() on this OS
|
|
4924 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
|
|
4925 allow_exec);
|
|
4926 }
|
|
4927
|
|
4928
|
|
4929 // Unmap a block of memory.
|
|
4930 bool os::unmap_memory(char* addr, size_t bytes) {
|
|
4931 return munmap(addr, bytes) == 0;
|
|
4932 }
|
|
4933
|
|
4934 void os::pause() {
|
|
4935 char filename[MAX_PATH];
|
|
4936 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
|
|
4937 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
|
|
4938 } else {
|
|
4939 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
|
|
4940 }
|
|
4941
|
|
4942 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
|
|
4943 if (fd != -1) {
|
|
4944 struct stat buf;
|
|
4945 close(fd);
|
|
4946 while (::stat(filename, &buf) == 0) {
|
|
4947 (void)::poll(NULL, 0, 100);
|
|
4948 }
|
|
4949 } else {
|
|
4950 jio_fprintf(stderr,
|
|
4951 "Could not open pause file '%s', continuing immediately.\n", filename);
|
|
4952 }
|
|
4953 }
|
|
4954
|
|
4955 #ifndef PRODUCT
|
|
4956 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
|
|
4957 // Turn this on if you need to trace synch operations.
|
|
4958 // Set RECORD_SYNCH_LIMIT to a large-enough value,
|
|
4959 // and call record_synch_enable and record_synch_disable
|
|
4960 // around the computation of interest.
|
|
4961
|
|
4962 void record_synch(char* name, bool returning); // defined below
|
|
4963
|
|
4964 class RecordSynch {
|
|
4965 char* _name;
|
|
4966 public:
|
|
4967 RecordSynch(char* name) :_name(name)
|
|
4968 { record_synch(_name, false); }
|
|
4969 ~RecordSynch() { record_synch(_name, true); }
|
|
4970 };
|
|
4971
|
|
4972 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
|
|
4973 extern "C" ret name params { \
|
|
4974 typedef ret name##_t params; \
|
|
4975 static name##_t* implem = NULL; \
|
|
4976 static int callcount = 0; \
|
|
4977 if (implem == NULL) { \
|
|
4978 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
|
|
4979 if (implem == NULL) fatal(dlerror()); \
|
|
4980 } \
|
|
4981 ++callcount; \
|
|
4982 RecordSynch _rs(#name); \
|
|
4983 inner; \
|
|
4984 return implem args; \
|
|
4985 }
|
|
4986 // in dbx, examine callcounts this way:
|
|
4987 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
|
|
4988
|
|
4989 #define CHECK_POINTER_OK(p) \
|
|
4990 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p)))
|
|
4991 #define CHECK_MU \
|
|
4992 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
|
|
4993 #define CHECK_CV \
|
|
4994 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
|
|
4995 #define CHECK_P(p) \
|
|
4996 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
|
|
4997
|
|
4998 #define CHECK_MUTEX(mutex_op) \
|
|
4999 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
|
|
5000
|
|
5001 CHECK_MUTEX( mutex_lock)
|
|
5002 CHECK_MUTEX( _mutex_lock)
|
|
5003 CHECK_MUTEX( mutex_unlock)
|
|
5004 CHECK_MUTEX(_mutex_unlock)
|
|
5005 CHECK_MUTEX( mutex_trylock)
|
|
5006 CHECK_MUTEX(_mutex_trylock)
|
|
5007
|
|
5008 #define CHECK_COND(cond_op) \
|
|
5009 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV);
|
|
5010
|
|
5011 CHECK_COND( cond_wait);
|
|
5012 CHECK_COND(_cond_wait);
|
|
5013 CHECK_COND(_cond_wait_cancel);
|
|
5014
|
|
5015 #define CHECK_COND2(cond_op) \
|
|
5016 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV);
|
|
5017
|
|
5018 CHECK_COND2( cond_timedwait);
|
|
5019 CHECK_COND2(_cond_timedwait);
|
|
5020 CHECK_COND2(_cond_timedwait_cancel);
|
|
5021
|
|
5022 // do the _lwp_* versions too
|
|
5023 #define mutex_t lwp_mutex_t
|
|
5024 #define cond_t lwp_cond_t
|
|
5025 CHECK_MUTEX( _lwp_mutex_lock)
|
|
5026 CHECK_MUTEX( _lwp_mutex_unlock)
|
|
5027 CHECK_MUTEX( _lwp_mutex_trylock)
|
|
5028 CHECK_MUTEX( __lwp_mutex_lock)
|
|
5029 CHECK_MUTEX( __lwp_mutex_unlock)
|
|
5030 CHECK_MUTEX( __lwp_mutex_trylock)
|
|
5031 CHECK_MUTEX(___lwp_mutex_lock)
|
|
5032 CHECK_MUTEX(___lwp_mutex_unlock)
|
|
5033
|
|
5034 CHECK_COND( _lwp_cond_wait);
|
|
5035 CHECK_COND( __lwp_cond_wait);
|
|
5036 CHECK_COND(___lwp_cond_wait);
|
|
5037
|
|
5038 CHECK_COND2( _lwp_cond_timedwait);
|
|
5039 CHECK_COND2( __lwp_cond_timedwait);
|
|
5040 #undef mutex_t
|
|
5041 #undef cond_t
|
|
5042
|
|
5043 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
|
|
5044 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
|
|
5045 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
|
|
5046 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
|
|
5047 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
|
|
5048 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
|
|
5049 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
|
|
5050 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
|
|
5051
|
|
5052
|
|
5053 // recording machinery:
|
|
5054
|
|
5055 enum { RECORD_SYNCH_LIMIT = 200 };
|
|
5056 char* record_synch_name[RECORD_SYNCH_LIMIT];
|
|
5057 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
|
|
5058 bool record_synch_returning[RECORD_SYNCH_LIMIT];
|
|
5059 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
|
|
5060 int record_synch_count = 0;
|
|
5061 bool record_synch_enabled = false;
|
|
5062
|
|
5063 // in dbx, examine recorded data this way:
|
|
5064 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
|
|
5065
|
|
5066 void record_synch(char* name, bool returning) {
|
|
5067 if (record_synch_enabled) {
|
|
5068 if (record_synch_count < RECORD_SYNCH_LIMIT) {
|
|
5069 record_synch_name[record_synch_count] = name;
|
|
5070 record_synch_returning[record_synch_count] = returning;
|
|
5071 record_synch_thread[record_synch_count] = thr_self();
|
|
5072 record_synch_arg0ptr[record_synch_count] = &name;
|
|
5073 record_synch_count++;
|
|
5074 }
|
|
5075 // put more checking code here:
|
|
5076 // ...
|
|
5077 }
|
|
5078 }
|
|
5079
|
|
5080 void record_synch_enable() {
|
|
5081 // start collecting trace data, if not already doing so
|
|
5082 if (!record_synch_enabled) record_synch_count = 0;
|
|
5083 record_synch_enabled = true;
|
|
5084 }
|
|
5085
|
|
5086 void record_synch_disable() {
|
|
5087 // stop collecting trace data
|
|
5088 record_synch_enabled = false;
|
|
5089 }
|
|
5090
|
|
5091 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
|
|
5092 #endif // PRODUCT
|
|
5093
|
|
5094 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
|
|
5095 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
|
|
5096 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
|
|
5097
|
|
5098
|
|
5099 // JVMTI & JVM monitoring and management support
|
|
5100 // The thread_cpu_time() and current_thread_cpu_time() are only
|
|
5101 // supported if is_thread_cpu_time_supported() returns true.
|
|
5102 // They are not supported on Solaris T1.
|
|
5103
|
|
5104 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
|
|
5105 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
|
|
5106 // of a thread.
|
|
5107 //
|
|
5108 // current_thread_cpu_time() and thread_cpu_time(Thread *)
|
|
5109 // returns the fast estimate available on the platform.
|
|
5110
|
|
5111 // hrtime_t gethrvtime() return value includes
|
|
5112 // user time but does not include system time
|
|
5113 jlong os::current_thread_cpu_time() {
|
|
5114 return (jlong) gethrvtime();
|
|
5115 }
|
|
5116
|
|
5117 jlong os::thread_cpu_time(Thread *thread) {
|
|
5118 // return user level CPU time only to be consistent with
|
|
5119 // what current_thread_cpu_time returns.
|
|
5120 // thread_cpu_time_info() must be changed if this changes
|
|
5121 return os::thread_cpu_time(thread, false /* user time only */);
|
|
5122 }
|
|
5123
|
|
5124 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
|
|
5125 if (user_sys_cpu_time) {
|
|
5126 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
|
|
5127 } else {
|
|
5128 return os::current_thread_cpu_time();
|
|
5129 }
|
|
5130 }
|
|
5131
|
|
5132 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
|
|
5133 char proc_name[64];
|
|
5134 int count;
|
|
5135 prusage_t prusage;
|
|
5136 jlong lwp_time;
|
|
5137 int fd;
|
|
5138
|
|
5139 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
|
|
5140 getpid(),
|
|
5141 thread->osthread()->lwp_id());
|
|
5142 fd = open(proc_name, O_RDONLY);
|
|
5143 if ( fd == -1 ) return -1;
|
|
5144
|
|
5145 do {
|
|
5146 count = pread(fd,
|
|
5147 (void *)&prusage.pr_utime,
|
|
5148 thr_time_size,
|
|
5149 thr_time_off);
|
|
5150 } while (count < 0 && errno == EINTR);
|
|
5151 close(fd);
|
|
5152 if ( count < 0 ) return -1;
|
|
5153
|
|
5154 if (user_sys_cpu_time) {
|
|
5155 // user + system CPU time
|
|
5156 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
|
|
5157 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
|
|
5158 (jlong)prusage.pr_stime.tv_nsec +
|
|
5159 (jlong)prusage.pr_utime.tv_nsec;
|
|
5160 } else {
|
|
5161 // user level CPU time only
|
|
5162 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
|
|
5163 (jlong)prusage.pr_utime.tv_nsec;
|
|
5164 }
|
|
5165
|
|
5166 return(lwp_time);
|
|
5167 }
|
|
5168
|
|
5169 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
|
|
5170 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
|
|
5171 info_ptr->may_skip_backward = false; // elapsed time not wall time
|
|
5172 info_ptr->may_skip_forward = false; // elapsed time not wall time
|
|
5173 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
|
|
5174 }
|
|
5175
|
|
5176 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
|
|
5177 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
|
|
5178 info_ptr->may_skip_backward = false; // elapsed time not wall time
|
|
5179 info_ptr->may_skip_forward = false; // elapsed time not wall time
|
|
5180 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
|
|
5181 }
|
|
5182
|
|
5183 bool os::is_thread_cpu_time_supported() {
|
|
5184 if ( os::Solaris::T2_libthread() || UseBoundThreads ) {
|
|
5185 return true;
|
|
5186 } else {
|
|
5187 return false;
|
|
5188 }
|
|
5189 }
|
|
5190
|
|
5191 // System loadavg support. Returns -1 if load average cannot be obtained.
|
|
5192 // Return the load average for our processor set if the primitive exists
|
|
5193 // (Solaris 9 and later). Otherwise just return system wide loadavg.
|
|
5194 int os::loadavg(double loadavg[], int nelem) {
|
|
5195 if (pset_getloadavg_ptr != NULL) {
|
|
5196 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
|
|
5197 } else {
|
|
5198 return ::getloadavg(loadavg, nelem);
|
|
5199 }
|
|
5200 }
|
|
5201
|
|
5202 //---------------------------------------------------------------------------------
|
|
5203 #ifndef PRODUCT
|
|
5204
|
|
5205 static address same_page(address x, address y) {
|
|
5206 intptr_t page_bits = -os::vm_page_size();
|
|
5207 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits))
|
|
5208 return x;
|
|
5209 else if (x > y)
|
|
5210 return (address)(intptr_t(y) | ~page_bits) + 1;
|
|
5211 else
|
|
5212 return (address)(intptr_t(y) & page_bits);
|
|
5213 }
|
|
5214
|
|
5215 bool os::find(address addr) {
|
|
5216 Dl_info dlinfo;
|
|
5217 memset(&dlinfo, 0, sizeof(dlinfo));
|
|
5218 if (dladdr(addr, &dlinfo)) {
|
|
5219 #ifdef _LP64
|
|
5220 tty->print("0x%016lx: ", addr);
|
|
5221 #else
|
|
5222 tty->print("0x%08x: ", addr);
|
|
5223 #endif
|
|
5224 if (dlinfo.dli_sname != NULL)
|
|
5225 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
|
|
5226 else if (dlinfo.dli_fname)
|
|
5227 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
|
|
5228 else
|
|
5229 tty->print("<absolute address>");
|
|
5230 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname);
|
|
5231 #ifdef _LP64
|
|
5232 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase);
|
|
5233 #else
|
|
5234 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase);
|
|
5235 #endif
|
|
5236 tty->cr();
|
|
5237
|
|
5238 if (Verbose) {
|
|
5239 // decode some bytes around the PC
|
|
5240 address begin = same_page(addr-40, addr);
|
|
5241 address end = same_page(addr+40, addr);
|
|
5242 address lowest = (address) dlinfo.dli_sname;
|
|
5243 if (!lowest) lowest = (address) dlinfo.dli_fbase;
|
|
5244 if (begin < lowest) begin = lowest;
|
|
5245 Dl_info dlinfo2;
|
|
5246 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
|
|
5247 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
|
|
5248 end = (address) dlinfo2.dli_saddr;
|
|
5249 Disassembler::decode(begin, end);
|
|
5250 }
|
|
5251 return true;
|
|
5252 }
|
|
5253 return false;
|
|
5254 }
|
|
5255
|
|
5256 #endif
|
|
5257
|
|
5258
|
|
5259 // Following function has been added to support HotSparc's libjvm.so running
|
|
5260 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
|
|
5261 // src/solaris/hpi/native_threads in the EVM codebase.
|
|
5262 //
|
|
5263 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
|
|
5264 // libraries and should thus be removed. We will leave it behind for a while
|
|
5265 // until we no longer want to able to run on top of 1.3.0 Solaris production
|
|
5266 // JDK. See 4341971.
|
|
5267
|
|
5268 #define STACK_SLACK 0x800
|
|
5269
|
|
5270 extern "C" {
|
|
5271 intptr_t sysThreadAvailableStackWithSlack() {
|
|
5272 stack_t st;
|
|
5273 intptr_t retval, stack_top;
|
|
5274 retval = thr_stksegment(&st);
|
|
5275 assert(retval == 0, "incorrect return value from thr_stksegment");
|
|
5276 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
|
|
5277 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
|
|
5278 stack_top=(intptr_t)st.ss_sp-st.ss_size;
|
|
5279 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
|
|
5280 }
|
|
5281 }
|
|
5282
|
|
5283 // Just to get the Kernel build to link on solaris for testing.
|
|
5284
|
|
5285 extern "C" {
|
|
5286 class ASGCT_CallTrace;
|
|
5287 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext)
|
|
5288 KERNEL_RETURN;
|
|
5289 }
|
|
5290
|
|
5291
|
|
5292 // ObjectMonitor park-unpark infrastructure ...
|
|
5293 //
|
|
5294 // We implement Solaris and Linux PlatformEvents with the
|
|
5295 // obvious condvar-mutex-flag triple.
|
|
5296 // Another alternative that works quite well is pipes:
|
|
5297 // Each PlatformEvent consists of a pipe-pair.
|
|
5298 // The thread associated with the PlatformEvent
|
|
5299 // calls park(), which reads from the input end of the pipe.
|
|
5300 // Unpark() writes into the other end of the pipe.
|
|
5301 // The write-side of the pipe must be set NDELAY.
|
|
5302 // Unfortunately pipes consume a large # of handles.
|
|
5303 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
|
|
5304 // Using pipes for the 1st few threads might be workable, however.
|
|
5305 //
|
|
5306 // park() is permitted to return spuriously.
|
|
5307 // Callers of park() should wrap the call to park() in
|
|
5308 // an appropriate loop. A litmus test for the correct
|
|
5309 // usage of park is the following: if park() were modified
|
|
5310 // to immediately return 0 your code should still work,
|
|
5311 // albeit degenerating to a spin loop.
|
|
5312 //
|
|
5313 // An interesting optimization for park() is to use a trylock()
|
|
5314 // to attempt to acquire the mutex. If the trylock() fails
|
|
5315 // then we know that a concurrent unpark() operation is in-progress.
|
|
5316 // in that case the park() code could simply set _count to 0
|
|
5317 // and return immediately. The subsequent park() operation *might*
|
|
5318 // return immediately. That's harmless as the caller of park() is
|
|
5319 // expected to loop. By using trylock() we will have avoided a
|
|
5320 // avoided a context switch caused by contention on the per-thread mutex.
|
|
5321 //
|
|
5322 // TODO-FIXME:
|
|
5323 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the
|
|
5324 // objectmonitor implementation.
|
|
5325 // 2. Collapse the JSR166 parker event, and the
|
|
5326 // objectmonitor ParkEvent into a single "Event" construct.
|
|
5327 // 3. In park() and unpark() add:
|
|
5328 // assert (Thread::current() == AssociatedWith).
|
|
5329 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch.
|
|
5330 // 1-out-of-N park() operations will return immediately.
|
|
5331 //
|
|
5332 // _Event transitions in park()
|
|
5333 // -1 => -1 : illegal
|
|
5334 // 1 => 0 : pass - return immediately
|
|
5335 // 0 => -1 : block
|
|
5336 //
|
|
5337 // _Event serves as a restricted-range semaphore.
|
|
5338 //
|
|
5339 // Another possible encoding of _Event would be with
|
|
5340 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
|
|
5341 //
|
|
5342 // TODO-FIXME: add DTRACE probes for:
|
|
5343 // 1. Tx parks
|
|
5344 // 2. Ty unparks Tx
|
|
5345 // 3. Tx resumes from park
|
|
5346
|
|
5347
|
|
5348 // value determined through experimentation
|
|
5349 #define ROUNDINGFIX 11
|
|
5350
|
|
5351 // utility to compute the abstime argument to timedwait.
|
|
5352 // TODO-FIXME: switch from compute_abstime() to unpackTime().
|
|
5353
|
|
5354 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
|
|
5355 // millis is the relative timeout time
|
|
5356 // abstime will be the absolute timeout time
|
|
5357 if (millis < 0) millis = 0;
|
|
5358 struct timeval now;
|
|
5359 int status = gettimeofday(&now, NULL);
|
|
5360 assert(status == 0, "gettimeofday");
|
|
5361 jlong seconds = millis / 1000;
|
|
5362 jlong max_wait_period;
|
|
5363
|
|
5364 if (UseLWPSynchronization) {
|
|
5365 // forward port of fix for 4275818 (not sleeping long enough)
|
|
5366 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
|
|
5367 // _lwp_cond_timedwait() used a round_down algorithm rather
|
|
5368 // than a round_up. For millis less than our roundfactor
|
|
5369 // it rounded down to 0 which doesn't meet the spec.
|
|
5370 // For millis > roundfactor we may return a bit sooner, but
|
|
5371 // since we can not accurately identify the patch level and
|
|
5372 // this has already been fixed in Solaris 9 and 8 we will
|
|
5373 // leave it alone rather than always rounding down.
|
|
5374
|
|
5375 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
|
|
5376 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
|
|
5377 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
|
|
5378 max_wait_period = 21000000;
|
|
5379 } else {
|
|
5380 max_wait_period = 50000000;
|
|
5381 }
|
|
5382 millis %= 1000;
|
|
5383 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
|
|
5384 seconds = max_wait_period;
|
|
5385 }
|
|
5386 abstime->tv_sec = now.tv_sec + seconds;
|
|
5387 long usec = now.tv_usec + millis * 1000;
|
|
5388 if (usec >= 1000000) {
|
|
5389 abstime->tv_sec += 1;
|
|
5390 usec -= 1000000;
|
|
5391 }
|
|
5392 abstime->tv_nsec = usec * 1000;
|
|
5393 return abstime;
|
|
5394 }
|
|
5395
|
|
5396 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
|
|
5397 // Conceptually TryPark() should be equivalent to park(0).
|
|
5398
|
|
5399 int os::PlatformEvent::TryPark() {
|
|
5400 for (;;) {
|
|
5401 const int v = _Event ;
|
|
5402 guarantee ((v == 0) || (v == 1), "invariant") ;
|
|
5403 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ;
|
|
5404 }
|
|
5405 }
|
|
5406
|
|
5407 void os::PlatformEvent::park() { // AKA: down()
|
|
5408 // Invariant: Only the thread associated with the Event/PlatformEvent
|
|
5409 // may call park().
|
|
5410 int v ;
|
|
5411 for (;;) {
|
|
5412 v = _Event ;
|
|
5413 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
|
|
5414 }
|
|
5415 guarantee (v >= 0, "invariant") ;
|
|
5416 if (v == 0) {
|
|
5417 // Do this the hard way by blocking ...
|
|
5418 // See http://monaco.sfbay/detail.jsf?cr=5094058.
|
|
5419 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
|
|
5420 // Only for SPARC >= V8PlusA
|
|
5421 #if defined(__sparc) && defined(COMPILER2)
|
|
5422 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
|
|
5423 #endif
|
|
5424 int status = os::Solaris::mutex_lock(_mutex);
|
|
5425 assert_status(status == 0, status, "mutex_lock");
|
|
5426 guarantee (_nParked == 0, "invariant") ;
|
|
5427 ++ _nParked ;
|
|
5428 while (_Event < 0) {
|
|
5429 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
|
|
5430 // Treat this the same as if the wait was interrupted
|
|
5431 // With usr/lib/lwp going to kernel, always handle ETIME
|
|
5432 status = os::Solaris::cond_wait(_cond, _mutex);
|
|
5433 if (status == ETIME) status = EINTR ;
|
|
5434 assert_status(status == 0 || status == EINTR, status, "cond_wait");
|
|
5435 }
|
|
5436 -- _nParked ;
|
|
5437 _Event = 0 ;
|
|
5438 status = os::Solaris::mutex_unlock(_mutex);
|
|
5439 assert_status(status == 0, status, "mutex_unlock");
|
|
5440 }
|
|
5441 }
|
|
5442
|
|
5443 int os::PlatformEvent::park(jlong millis) {
|
|
5444 guarantee (_nParked == 0, "invariant") ;
|
|
5445 int v ;
|
|
5446 for (;;) {
|
|
5447 v = _Event ;
|
|
5448 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
|
|
5449 }
|
|
5450 guarantee (v >= 0, "invariant") ;
|
|
5451 if (v != 0) return OS_OK ;
|
|
5452
|
|
5453 int ret = OS_TIMEOUT;
|
|
5454 timestruc_t abst;
|
|
5455 compute_abstime (&abst, millis);
|
|
5456
|
|
5457 // See http://monaco.sfbay/detail.jsf?cr=5094058.
|
|
5458 // For Solaris SPARC set fprs.FEF=0 prior to parking.
|
|
5459 // Only for SPARC >= V8PlusA
|
|
5460 #if defined(__sparc) && defined(COMPILER2)
|
|
5461 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
|
|
5462 #endif
|
|
5463 int status = os::Solaris::mutex_lock(_mutex);
|
|
5464 assert_status(status == 0, status, "mutex_lock");
|
|
5465 guarantee (_nParked == 0, "invariant") ;
|
|
5466 ++ _nParked ;
|
|
5467 while (_Event < 0) {
|
|
5468 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
|
|
5469 assert_status(status == 0 || status == EINTR ||
|
|
5470 status == ETIME || status == ETIMEDOUT,
|
|
5471 status, "cond_timedwait");
|
|
5472 if (!FilterSpuriousWakeups) break ; // previous semantics
|
|
5473 if (status == ETIME || status == ETIMEDOUT) break ;
|
|
5474 // We consume and ignore EINTR and spurious wakeups.
|
|
5475 }
|
|
5476 -- _nParked ;
|
|
5477 if (_Event >= 0) ret = OS_OK ;
|
|
5478 _Event = 0 ;
|
|
5479 status = os::Solaris::mutex_unlock(_mutex);
|
|
5480 assert_status(status == 0, status, "mutex_unlock");
|
|
5481 return ret;
|
|
5482 }
|
|
5483
|
|
5484 void os::PlatformEvent::unpark() {
|
|
5485 int v, AnyWaiters;
|
|
5486
|
|
5487 // Increment _Event.
|
|
5488 // Another acceptable implementation would be to simply swap 1
|
|
5489 // into _Event:
|
|
5490 // if (Swap (&_Event, 1) < 0) {
|
|
5491 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ;
|
|
5492 // if (AnyWaiters) cond_signal (_cond) ;
|
|
5493 // }
|
|
5494
|
|
5495 for (;;) {
|
|
5496 v = _Event ;
|
|
5497 if (v > 0) {
|
|
5498 // The LD of _Event could have reordered or be satisfied
|
|
5499 // by a read-aside from this processor's write buffer.
|
|
5500 // To avoid problems execute a barrier and then
|
|
5501 // ratify the value. A degenerate CAS() would also work.
|
|
5502 // Viz., CAS (v+0, &_Event, v) == v).
|
|
5503 OrderAccess::fence() ;
|
|
5504 if (_Event == v) return ;
|
|
5505 continue ;
|
|
5506 }
|
|
5507 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ;
|
|
5508 }
|
|
5509
|
|
5510 // If the thread associated with the event was parked, wake it.
|
|
5511 if (v < 0) {
|
|
5512 int status ;
|
|
5513 // Wait for the thread assoc with the PlatformEvent to vacate.
|
|
5514 status = os::Solaris::mutex_lock(_mutex);
|
|
5515 assert_status(status == 0, status, "mutex_lock");
|
|
5516 AnyWaiters = _nParked ;
|
|
5517 status = os::Solaris::mutex_unlock(_mutex);
|
|
5518 assert_status(status == 0, status, "mutex_unlock");
|
|
5519 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ;
|
|
5520 if (AnyWaiters != 0) {
|
|
5521 // We intentional signal *after* dropping the lock
|
|
5522 // to avoid a common class of futile wakeups.
|
|
5523 status = os::Solaris::cond_signal(_cond);
|
|
5524 assert_status(status == 0, status, "cond_signal");
|
|
5525 }
|
|
5526 }
|
|
5527 }
|
|
5528
|
|
5529 // JSR166
|
|
5530 // -------------------------------------------------------
|
|
5531
|
|
5532 /*
|
|
5533 * The solaris and linux implementations of park/unpark are fairly
|
|
5534 * conservative for now, but can be improved. They currently use a
|
|
5535 * mutex/condvar pair, plus _counter.
|
|
5536 * Park decrements _counter if > 0, else does a condvar wait. Unpark
|
|
5537 * sets count to 1 and signals condvar. Only one thread ever waits
|
|
5538 * on the condvar. Contention seen when trying to park implies that someone
|
|
5539 * is unparking you, so don't wait. And spurious returns are fine, so there
|
|
5540 * is no need to track notifications.
|
|
5541 */
|
|
5542
|
|
5543 #define NANOSECS_PER_SEC 1000000000
|
|
5544 #define NANOSECS_PER_MILLISEC 1000000
|
|
5545 #define MAX_SECS 100000000
|
|
5546
|
|
5547 /*
|
|
5548 * This code is common to linux and solaris and will be moved to a
|
|
5549 * common place in dolphin.
|
|
5550 *
|
|
5551 * The passed in time value is either a relative time in nanoseconds
|
|
5552 * or an absolute time in milliseconds. Either way it has to be unpacked
|
|
5553 * into suitable seconds and nanoseconds components and stored in the
|
|
5554 * given timespec structure.
|
|
5555 * Given time is a 64-bit value and the time_t used in the timespec is only
|
|
5556 * a signed-32-bit value (except on 64-bit Linux) we have to watch for
|
|
5557 * overflow if times way in the future are given. Further on Solaris versions
|
|
5558 * prior to 10 there is a restriction (see cond_timedwait) that the specified
|
|
5559 * number of seconds, in abstime, is less than current_time + 100,000,000.
|
|
5560 * As it will be 28 years before "now + 100000000" will overflow we can
|
|
5561 * ignore overflow and just impose a hard-limit on seconds using the value
|
|
5562 * of "now + 100,000,000". This places a limit on the timeout of about 3.17
|
|
5563 * years from "now".
|
|
5564 */
|
|
5565 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
|
|
5566 assert (time > 0, "convertTime");
|
|
5567
|
|
5568 struct timeval now;
|
|
5569 int status = gettimeofday(&now, NULL);
|
|
5570 assert(status == 0, "gettimeofday");
|
|
5571
|
|
5572 time_t max_secs = now.tv_sec + MAX_SECS;
|
|
5573
|
|
5574 if (isAbsolute) {
|
|
5575 jlong secs = time / 1000;
|
|
5576 if (secs > max_secs) {
|
|
5577 absTime->tv_sec = max_secs;
|
|
5578 }
|
|
5579 else {
|
|
5580 absTime->tv_sec = secs;
|
|
5581 }
|
|
5582 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
|
|
5583 }
|
|
5584 else {
|
|
5585 jlong secs = time / NANOSECS_PER_SEC;
|
|
5586 if (secs >= MAX_SECS) {
|
|
5587 absTime->tv_sec = max_secs;
|
|
5588 absTime->tv_nsec = 0;
|
|
5589 }
|
|
5590 else {
|
|
5591 absTime->tv_sec = now.tv_sec + secs;
|
|
5592 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
|
|
5593 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
|
|
5594 absTime->tv_nsec -= NANOSECS_PER_SEC;
|
|
5595 ++absTime->tv_sec; // note: this must be <= max_secs
|
|
5596 }
|
|
5597 }
|
|
5598 }
|
|
5599 assert(absTime->tv_sec >= 0, "tv_sec < 0");
|
|
5600 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
|
|
5601 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
|
|
5602 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
|
|
5603 }
|
|
5604
|
|
5605 void Parker::park(bool isAbsolute, jlong time) {
|
|
5606
|
|
5607 // Optional fast-path check:
|
|
5608 // Return immediately if a permit is available.
|
|
5609 if (_counter > 0) {
|
|
5610 _counter = 0 ;
|
|
5611 return ;
|
|
5612 }
|
|
5613
|
|
5614 // Optional fast-exit: Check interrupt before trying to wait
|
|
5615 Thread* thread = Thread::current();
|
|
5616 assert(thread->is_Java_thread(), "Must be JavaThread");
|
|
5617 JavaThread *jt = (JavaThread *)thread;
|
|
5618 if (Thread::is_interrupted(thread, false)) {
|
|
5619 return;
|
|
5620 }
|
|
5621
|
|
5622 // First, demultiplex/decode time arguments
|
|
5623 timespec absTime;
|
|
5624 if (time < 0) { // don't wait at all
|
|
5625 return;
|
|
5626 }
|
|
5627 if (time > 0) {
|
|
5628 // Warning: this code might be exposed to the old Solaris time
|
|
5629 // round-down bugs. Grep "roundingFix" for details.
|
|
5630 unpackTime(&absTime, isAbsolute, time);
|
|
5631 }
|
|
5632
|
|
5633 // Enter safepoint region
|
|
5634 // Beware of deadlocks such as 6317397.
|
|
5635 // The per-thread Parker:: _mutex is a classic leaf-lock.
|
|
5636 // In particular a thread must never block on the Threads_lock while
|
|
5637 // holding the Parker:: mutex. If safepoints are pending both the
|
|
5638 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
|
|
5639 ThreadBlockInVM tbivm(jt);
|
|
5640
|
|
5641 // Don't wait if cannot get lock since interference arises from
|
|
5642 // unblocking. Also. check interrupt before trying wait
|
|
5643 if (Thread::is_interrupted(thread, false) ||
|
|
5644 os::Solaris::mutex_trylock(_mutex) != 0) {
|
|
5645 return;
|
|
5646 }
|
|
5647
|
|
5648 int status ;
|
|
5649
|
|
5650 if (_counter > 0) { // no wait needed
|
|
5651 _counter = 0;
|
|
5652 status = os::Solaris::mutex_unlock(_mutex);
|
|
5653 assert (status == 0, "invariant") ;
|
|
5654 return;
|
|
5655 }
|
|
5656
|
|
5657 #ifdef ASSERT
|
|
5658 // Don't catch signals while blocked; let the running threads have the signals.
|
|
5659 // (This allows a debugger to break into the running thread.)
|
|
5660 sigset_t oldsigs;
|
|
5661 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
|
|
5662 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
|
|
5663 #endif
|
|
5664
|
|
5665 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
|
|
5666 jt->set_suspend_equivalent();
|
|
5667 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
|
|
5668
|
|
5669 // Do this the hard way by blocking ...
|
|
5670 // See http://monaco.sfbay/detail.jsf?cr=5094058.
|
|
5671 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
|
|
5672 // Only for SPARC >= V8PlusA
|
|
5673 #if defined(__sparc) && defined(COMPILER2)
|
|
5674 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
|
|
5675 #endif
|
|
5676
|
|
5677 if (time == 0) {
|
|
5678 status = os::Solaris::cond_wait (_cond, _mutex) ;
|
|
5679 } else {
|
|
5680 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
|
|
5681 }
|
|
5682 // Note that an untimed cond_wait() can sometimes return ETIME on older
|
|
5683 // versions of the Solaris.
|
|
5684 assert_status(status == 0 || status == EINTR ||
|
|
5685 status == ETIME || status == ETIMEDOUT,
|
|
5686 status, "cond_timedwait");
|
|
5687
|
|
5688 #ifdef ASSERT
|
|
5689 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
|
|
5690 #endif
|
|
5691 _counter = 0 ;
|
|
5692 status = os::Solaris::mutex_unlock(_mutex);
|
|
5693 assert_status(status == 0, status, "mutex_unlock") ;
|
|
5694
|
|
5695 // If externally suspended while waiting, re-suspend
|
|
5696 if (jt->handle_special_suspend_equivalent_condition()) {
|
|
5697 jt->java_suspend_self();
|
|
5698 }
|
|
5699
|
|
5700 }
|
|
5701
|
|
5702 void Parker::unpark() {
|
|
5703 int s, status ;
|
|
5704 status = os::Solaris::mutex_lock (_mutex) ;
|
|
5705 assert (status == 0, "invariant") ;
|
|
5706 s = _counter;
|
|
5707 _counter = 1;
|
|
5708 status = os::Solaris::mutex_unlock (_mutex) ;
|
|
5709 assert (status == 0, "invariant") ;
|
|
5710
|
|
5711 if (s < 1) {
|
|
5712 status = os::Solaris::cond_signal (_cond) ;
|
|
5713 assert (status == 0, "invariant") ;
|
|
5714 }
|
|
5715 }
|
|
5716
|
|
5717 extern char** environ;
|
|
5718
|
|
5719 // Run the specified command in a separate process. Return its exit value,
|
|
5720 // or -1 on failure (e.g. can't fork a new process).
|
|
5721 // Unlike system(), this function can be called from signal handler. It
|
|
5722 // doesn't block SIGINT et al.
|
|
5723 int os::fork_and_exec(char* cmd) {
|
|
5724 char * argv[4];
|
|
5725 argv[0] = (char *)"sh";
|
|
5726 argv[1] = (char *)"-c";
|
|
5727 argv[2] = cmd;
|
|
5728 argv[3] = NULL;
|
|
5729
|
|
5730 // fork is async-safe, fork1 is not so can't use in signal handler
|
|
5731 pid_t pid;
|
|
5732 Thread* t = ThreadLocalStorage::get_thread_slow();
|
|
5733 if (t != NULL && t->is_inside_signal_handler()) {
|
|
5734 pid = fork();
|
|
5735 } else {
|
|
5736 pid = fork1();
|
|
5737 }
|
|
5738
|
|
5739 if (pid < 0) {
|
|
5740 // fork failed
|
|
5741 warning("fork failed: %s", strerror(errno));
|
|
5742 return -1;
|
|
5743
|
|
5744 } else if (pid == 0) {
|
|
5745 // child process
|
|
5746
|
|
5747 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
|
|
5748 execve("/usr/bin/sh", argv, environ);
|
|
5749
|
|
5750 // execve failed
|
|
5751 _exit(-1);
|
|
5752
|
|
5753 } else {
|
|
5754 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
|
|
5755 // care about the actual exit code, for now.
|
|
5756
|
|
5757 int status;
|
|
5758
|
|
5759 // Wait for the child process to exit. This returns immediately if
|
|
5760 // the child has already exited. */
|
|
5761 while (waitpid(pid, &status, 0) < 0) {
|
|
5762 switch (errno) {
|
|
5763 case ECHILD: return 0;
|
|
5764 case EINTR: break;
|
|
5765 default: return -1;
|
|
5766 }
|
|
5767 }
|
|
5768
|
|
5769 if (WIFEXITED(status)) {
|
|
5770 // The child exited normally; get its exit code.
|
|
5771 return WEXITSTATUS(status);
|
|
5772 } else if (WIFSIGNALED(status)) {
|
|
5773 // The child exited because of a signal
|
|
5774 // The best value to return is 0x80 + signal number,
|
|
5775 // because that is what all Unix shells do, and because
|
|
5776 // it allows callers to distinguish between process exit and
|
|
5777 // process death by signal.
|
|
5778 return 0x80 + WTERMSIG(status);
|
|
5779 } else {
|
|
5780 // Unknown exit code; pass it through
|
|
5781 return status;
|
|
5782 }
|
|
5783 }
|
|
5784 }
|