Mercurial > hg > truffle
annotate src/os_cpu/linux_ppc/vm/os_linux_ppc.cpp @ 18092:9e2bb00a8191 jdk8u25-b11
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author | coffeys |
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date | Fri, 01 Aug 2014 10:16:39 +0100 |
parents | 67fa91961822 |
children | 327e7269f90d |
rev | line source |
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1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * Copyright 2012, 2013 SAP AG. All rights reserved. |
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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5 * |
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6 * This code is free software; you can redistribute it and/or modify it |
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7 * under the terms of the GNU General Public License version 2 only, as |
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8 * published by the Free Software Foundation. |
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9 * |
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10 * This code is distributed in the hope that it will be useful, but WITHOUT |
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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13 * version 2 for more details (a copy is included in the LICENSE file hat |
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14 * accompanied this code). |
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15 * |
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16 * You should have received a copy of the GNU General Public License version |
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17 * 2 along with this work; if not, write to the Free Software Foundation, |
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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19 * |
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 * or visit www.oracle.com if you need additional information or have any |
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22 * questions. |
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23 * |
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24 */ |
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25 |
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26 // no precompiled headers |
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27 #include "assembler_ppc.inline.hpp" |
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28 #include "classfile/classLoader.hpp" |
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29 #include "classfile/systemDictionary.hpp" |
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30 #include "classfile/vmSymbols.hpp" |
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31 #include "code/icBuffer.hpp" |
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32 #include "code/vtableStubs.hpp" |
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33 #include "interpreter/interpreter.hpp" |
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34 #include "jvm_linux.h" |
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35 #include "memory/allocation.inline.hpp" |
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36 #include "mutex_linux.inline.hpp" |
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37 #include "nativeInst_ppc.hpp" |
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38 #include "os_share_linux.hpp" |
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39 #include "prims/jniFastGetField.hpp" |
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40 #include "prims/jvm.h" |
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41 #include "prims/jvm_misc.hpp" |
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42 #include "runtime/arguments.hpp" |
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43 #include "runtime/extendedPC.hpp" |
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44 #include "runtime/frame.inline.hpp" |
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45 #include "runtime/interfaceSupport.hpp" |
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46 #include "runtime/java.hpp" |
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47 #include "runtime/javaCalls.hpp" |
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48 #include "runtime/mutexLocker.hpp" |
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49 #include "runtime/osThread.hpp" |
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50 #include "runtime/sharedRuntime.hpp" |
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51 #include "runtime/stubRoutines.hpp" |
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52 #include "runtime/thread.inline.hpp" |
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53 #include "runtime/timer.hpp" |
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54 #include "utilities/events.hpp" |
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55 #include "utilities/vmError.hpp" |
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56 |
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57 // put OS-includes here |
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58 # include <sys/types.h> |
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59 # include <sys/mman.h> |
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60 # include <pthread.h> |
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61 # include <signal.h> |
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62 # include <errno.h> |
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63 # include <dlfcn.h> |
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64 # include <stdlib.h> |
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65 # include <stdio.h> |
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66 # include <unistd.h> |
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67 # include <sys/resource.h> |
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68 # include <pthread.h> |
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69 # include <sys/stat.h> |
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70 # include <sys/time.h> |
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71 # include <sys/utsname.h> |
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72 # include <sys/socket.h> |
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73 # include <sys/wait.h> |
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74 # include <pwd.h> |
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75 # include <poll.h> |
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76 # include <ucontext.h> |
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77 |
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78 |
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79 address os::current_stack_pointer() { |
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80 intptr_t* csp; |
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81 |
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82 // inline assembly `mr regno(csp), R1_SP': |
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83 __asm__ __volatile__ ("mr %0, 1":"=r"(csp):); |
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84 |
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85 return (address) csp; |
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86 } |
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87 |
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88 char* os::non_memory_address_word() { |
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89 // Must never look like an address returned by reserve_memory, |
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90 // even in its subfields (as defined by the CPU immediate fields, |
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91 // if the CPU splits constants across multiple instructions). |
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92 |
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93 return (char*) -1; |
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94 } |
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95 |
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96 void os::initialize_thread(Thread *thread) { } |
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97 |
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98 // Frame information (pc, sp, fp) retrieved via ucontext |
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99 // always looks like a C-frame according to the frame |
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100 // conventions in frame_ppc64.hpp. |
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101 address os::Linux::ucontext_get_pc(ucontext_t * uc) { |
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102 // On powerpc64, ucontext_t is not selfcontained but contains |
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103 // a pointer to an optional substructure (mcontext_t.regs) containing the volatile |
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104 // registers - NIP, among others. |
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105 // This substructure may or may not be there depending where uc came from: |
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106 // - if uc was handed over as the argument to a sigaction handler, a pointer to the |
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107 // substructure was provided by the kernel when calling the signal handler, and |
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108 // regs->nip can be accessed. |
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109 // - if uc was filled by getcontext(), it is undefined - getcontext() does not fill |
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110 // it because the volatile registers are not needed to make setcontext() work. |
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111 // Hopefully it was zero'd out beforehand. |
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112 guarantee(uc->uc_mcontext.regs != NULL, "only use ucontext_get_pc in sigaction context"); |
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113 return (address)uc->uc_mcontext.regs->nip; |
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114 } |
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115 |
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116 intptr_t* os::Linux::ucontext_get_sp(ucontext_t * uc) { |
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117 return (intptr_t*)uc->uc_mcontext.regs->gpr[1/*REG_SP*/]; |
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118 } |
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119 |
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120 intptr_t* os::Linux::ucontext_get_fp(ucontext_t * uc) { |
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121 return NULL; |
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122 } |
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123 |
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124 ExtendedPC os::fetch_frame_from_context(void* ucVoid, |
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125 intptr_t** ret_sp, intptr_t** ret_fp) { |
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126 |
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127 ExtendedPC epc; |
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128 ucontext_t* uc = (ucontext_t*)ucVoid; |
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129 |
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130 if (uc != NULL) { |
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131 epc = ExtendedPC(os::Linux::ucontext_get_pc(uc)); |
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132 if (ret_sp) *ret_sp = os::Linux::ucontext_get_sp(uc); |
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133 if (ret_fp) *ret_fp = os::Linux::ucontext_get_fp(uc); |
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134 } else { |
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135 // construct empty ExtendedPC for return value checking |
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136 epc = ExtendedPC(NULL); |
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137 if (ret_sp) *ret_sp = (intptr_t *)NULL; |
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138 if (ret_fp) *ret_fp = (intptr_t *)NULL; |
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139 } |
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140 |
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141 return epc; |
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142 } |
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143 |
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144 frame os::fetch_frame_from_context(void* ucVoid) { |
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145 intptr_t* sp; |
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146 intptr_t* fp; |
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147 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); |
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148 return frame(sp, epc.pc()); |
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149 } |
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150 |
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151 frame os::get_sender_for_C_frame(frame* fr) { |
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152 if (*fr->sp() == 0) { |
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153 // fr is the last C frame |
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154 return frame(NULL, NULL); |
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155 } |
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156 return frame(fr->sender_sp(), fr->sender_pc()); |
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157 } |
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158 |
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159 |
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160 frame os::current_frame() { |
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161 intptr_t* csp = (intptr_t*) *((intptr_t*) os::current_stack_pointer()); |
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162 // hack. |
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163 frame topframe(csp, (address)0x8); |
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164 // return sender of current topframe which hopefully has pc != NULL. |
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165 return os::get_sender_for_C_frame(&topframe); |
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166 } |
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167 |
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168 // Utility functions |
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169 |
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170 extern "C" JNIEXPORT int |
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171 JVM_handle_linux_signal(int sig, |
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172 siginfo_t* info, |
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173 void* ucVoid, |
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174 int abort_if_unrecognized) { |
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175 ucontext_t* uc = (ucontext_t*) ucVoid; |
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176 |
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177 Thread* t = ThreadLocalStorage::get_thread_slow(); |
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178 |
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179 SignalHandlerMark shm(t); |
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180 |
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181 // Note: it's not uncommon that JNI code uses signal/sigset to install |
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182 // then restore certain signal handler (e.g. to temporarily block SIGPIPE, |
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183 // or have a SIGILL handler when detecting CPU type). When that happens, |
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184 // JVM_handle_linux_signal() might be invoked with junk info/ucVoid. To |
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185 // avoid unnecessary crash when libjsig is not preloaded, try handle signals |
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186 // that do not require siginfo/ucontext first. |
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187 |
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188 if (sig == SIGPIPE) { |
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189 if (os::Linux::chained_handler(sig, info, ucVoid)) { |
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190 return true; |
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191 } else { |
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192 if (PrintMiscellaneous && (WizardMode || Verbose)) { |
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193 warning("Ignoring SIGPIPE - see bug 4229104"); |
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194 } |
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195 return true; |
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196 } |
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197 } |
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198 |
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199 JavaThread* thread = NULL; |
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200 VMThread* vmthread = NULL; |
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201 if (os::Linux::signal_handlers_are_installed) { |
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202 if (t != NULL) { |
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203 if(t->is_Java_thread()) { |
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204 thread = (JavaThread*)t; |
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205 } else if(t->is_VM_thread()) { |
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206 vmthread = (VMThread *)t; |
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207 } |
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208 } |
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209 } |
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210 |
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211 // Moved SafeFetch32 handling outside thread!=NULL conditional block to make |
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212 // it work if no associated JavaThread object exists. |
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213 if (uc) { |
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214 address const pc = os::Linux::ucontext_get_pc(uc); |
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215 if (pc && StubRoutines::is_safefetch_fault(pc)) { |
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216 uc->uc_mcontext.regs->nip = (unsigned long)StubRoutines::continuation_for_safefetch_fault(pc); |
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217 return true; |
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218 } |
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219 } |
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220 |
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221 // decide if this trap can be handled by a stub |
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222 address stub = NULL; |
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223 address pc = NULL; |
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224 |
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225 //%note os_trap_1 |
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226 if (info != NULL && uc != NULL && thread != NULL) { |
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227 pc = (address) os::Linux::ucontext_get_pc(uc); |
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228 |
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229 // Handle ALL stack overflow variations here |
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230 if (sig == SIGSEGV) { |
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231 // Si_addr may not be valid due to a bug in the linux-ppc64 kernel (see |
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232 // comment below). Use get_stack_bang_address instead of si_addr. |
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233 address addr = ((NativeInstruction*)pc)->get_stack_bang_address(uc); |
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234 |
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235 // Check if fault address is within thread stack. |
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236 if (addr < thread->stack_base() && |
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237 addr >= thread->stack_base() - thread->stack_size()) { |
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238 // stack overflow |
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239 if (thread->in_stack_yellow_zone(addr)) { |
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240 thread->disable_stack_yellow_zone(); |
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241 if (thread->thread_state() == _thread_in_Java) { |
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242 // Throw a stack overflow exception. |
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243 // Guard pages will be reenabled while unwinding the stack. |
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244 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); |
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245 } else { |
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246 // Thread was in the vm or native code. Return and try to finish. |
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247 return 1; |
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248 } |
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249 } else if (thread->in_stack_red_zone(addr)) { |
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250 // Fatal red zone violation. Disable the guard pages and fall through |
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251 // to handle_unexpected_exception way down below. |
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252 thread->disable_stack_red_zone(); |
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253 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); |
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254 |
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255 // This is a likely cause, but hard to verify. Let's just print |
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256 // it as a hint. |
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257 tty->print_raw_cr("Please check if any of your loaded .so files has " |
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258 "enabled executable stack (see man page execstack(8))"); |
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259 } else { |
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260 // Accessing stack address below sp may cause SEGV if current |
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261 // thread has MAP_GROWSDOWN stack. This should only happen when |
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262 // current thread was created by user code with MAP_GROWSDOWN flag |
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263 // and then attached to VM. See notes in os_linux.cpp. |
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264 if (thread->osthread()->expanding_stack() == 0) { |
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265 thread->osthread()->set_expanding_stack(); |
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266 if (os::Linux::manually_expand_stack(thread, addr)) { |
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|
267 thread->osthread()->clear_expanding_stack(); |
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268 return 1; |
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269 } |
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270 thread->osthread()->clear_expanding_stack(); |
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271 } else { |
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272 fatal("recursive segv. expanding stack."); |
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273 } |
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|
274 } |
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|
275 } |
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|
276 } |
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277 |
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278 if (thread->thread_state() == _thread_in_Java) { |
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279 // Java thread running in Java code => find exception handler if any |
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280 // a fault inside compiled code, the interpreter, or a stub |
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281 |
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282 // A VM-related SIGILL may only occur if we are not in the zero page. |
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283 // On AIX, we get a SIGILL if we jump to 0x0 or to somewhere else |
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284 // in the zero page, because it is filled with 0x0. We ignore |
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285 // explicit SIGILLs in the zero page. |
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286 if (sig == SIGILL && (pc < (address) 0x200)) { |
14445 | 287 if (TraceTraps) { |
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288 tty->print_raw_cr("SIGILL happened inside zero page."); |
14445 | 289 } |
14408
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290 goto report_and_die; |
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291 } |
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292 |
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293 // Handle signal from NativeJump::patch_verified_entry(). |
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294 if (( TrapBasedNotEntrantChecks && sig == SIGTRAP && nativeInstruction_at(pc)->is_sigtrap_zombie_not_entrant()) || |
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295 (!TrapBasedNotEntrantChecks && sig == SIGILL && nativeInstruction_at(pc)->is_sigill_zombie_not_entrant())) { |
14445 | 296 if (TraceTraps) { |
14408
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297 tty->print_cr("trap: zombie_not_entrant (%s)", (sig == SIGTRAP) ? "SIGTRAP" : "SIGILL"); |
14445 | 298 } |
14408
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299 stub = SharedRuntime::get_handle_wrong_method_stub(); |
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300 } |
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301 |
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302 else if (sig == SIGSEGV && |
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303 // A linux-ppc64 kernel before 2.6.6 doesn't set si_addr on some segfaults |
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304 // in 64bit mode (cf. http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.6), |
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305 // especially when we try to read from the safepoint polling page. So the check |
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306 // (address)info->si_addr == os::get_standard_polling_page() |
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307 // doesn't work for us. We use: |
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308 ((NativeInstruction*)pc)->is_safepoint_poll()) { |
14445 | 309 if (TraceTraps) { |
14408
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310 tty->print_cr("trap: safepoint_poll at " INTPTR_FORMAT " (SIGSEGV)", pc); |
14445 | 311 } |
14408
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312 stub = SharedRuntime::get_poll_stub(pc); |
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313 } |
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314 |
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|
315 // SIGTRAP-based ic miss check in compiled code. |
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316 else if (sig == SIGTRAP && TrapBasedICMissChecks && |
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317 nativeInstruction_at(pc)->is_sigtrap_ic_miss_check()) { |
14445 | 318 if (TraceTraps) { |
14408
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319 tty->print_cr("trap: ic_miss_check at " INTPTR_FORMAT " (SIGTRAP)", pc); |
14445 | 320 } |
14408
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321 stub = SharedRuntime::get_ic_miss_stub(); |
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322 } |
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|
323 |
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324 // SIGTRAP-based implicit null check in compiled code. |
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325 else if (sig == SIGTRAP && TrapBasedNullChecks && |
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326 nativeInstruction_at(pc)->is_sigtrap_null_check()) { |
14445 | 327 if (TraceTraps) { |
14408
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328 tty->print_cr("trap: null_check at " INTPTR_FORMAT " (SIGTRAP)", pc); |
14445 | 329 } |
14408
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330 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); |
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331 } |
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|
332 |
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333 // SIGSEGV-based implicit null check in compiled code. |
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|
334 else if (sig == SIGSEGV && ImplicitNullChecks && |
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335 CodeCache::contains((void*) pc) && |
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336 !MacroAssembler::needs_explicit_null_check((intptr_t) info->si_addr)) { |
14445 | 337 if (TraceTraps) { |
14408
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338 tty->print_cr("trap: null_check at " INTPTR_FORMAT " (SIGSEGV)", pc); |
14445 | 339 } |
14408
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340 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); |
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341 } |
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|
342 |
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|
343 #ifdef COMPILER2 |
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344 // SIGTRAP-based implicit range check in compiled code. |
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|
345 else if (sig == SIGTRAP && TrapBasedRangeChecks && |
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346 nativeInstruction_at(pc)->is_sigtrap_range_check()) { |
14445 | 347 if (TraceTraps) { |
14408
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348 tty->print_cr("trap: range_check at " INTPTR_FORMAT " (SIGTRAP)", pc); |
14445 | 349 } |
14408
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350 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); |
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|
351 } |
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|
352 #endif |
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|
353 else if (sig == SIGBUS) { |
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|
354 // BugId 4454115: A read from a MappedByteBuffer can fault here if the |
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|
355 // underlying file has been truncated. Do not crash the VM in such a case. |
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|
356 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); |
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|
357 nmethod* nm = (cb != NULL && cb->is_nmethod()) ? (nmethod*)cb : NULL; |
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|
358 if (nm != NULL && nm->has_unsafe_access()) { |
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|
359 // We don't really need a stub here! Just set the pending exeption and |
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|
360 // continue at the next instruction after the faulting read. Returning |
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|
361 // garbage from this read is ok. |
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parents:
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|
362 thread->set_pending_unsafe_access_error(); |
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parents:
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|
363 uc->uc_mcontext.regs->nip = ((unsigned long)pc) + 4; |
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parents:
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|
364 return true; |
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parents:
diff
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|
365 } |
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parents:
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|
366 } |
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parents:
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|
367 } |
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parents:
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|
368 |
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|
369 else { // thread->thread_state() != _thread_in_Java |
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|
370 if (sig == SIGILL && VM_Version::is_determine_features_test_running()) { |
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|
371 // SIGILL must be caused by VM_Version::determine_features(). |
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|
372 *(int *)pc = 0; // patch instruction to 0 to indicate that it causes a SIGILL, |
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|
373 // flushing of icache is not necessary. |
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|
374 stub = pc + 4; // continue with next instruction. |
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|
375 } |
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|
376 else if (thread->thread_state() == _thread_in_vm && |
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|
377 sig == SIGBUS && thread->doing_unsafe_access()) { |
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|
378 // We don't really need a stub here! Just set the pending exeption and |
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|
379 // continue at the next instruction after the faulting read. Returning |
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parents:
diff
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|
380 // garbage from this read is ok. |
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parents:
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|
381 thread->set_pending_unsafe_access_error(); |
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|
382 uc->uc_mcontext.regs->nip = ((unsigned long)pc) + 4; |
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parents:
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|
383 return true; |
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parents:
diff
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|
384 } |
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parents:
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|
385 } |
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parents:
diff
changeset
|
386 |
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parents:
diff
changeset
|
387 // Check to see if we caught the safepoint code in the |
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parents:
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|
388 // process of write protecting the memory serialization page. |
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parents:
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|
389 // It write enables the page immediately after protecting it |
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parents:
diff
changeset
|
390 // so we can just return to retry the write. |
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parents:
diff
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|
391 if ((sig == SIGSEGV) && |
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parents:
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|
392 // Si_addr may not be valid due to a bug in the linux-ppc64 kernel (see comment above). |
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parents:
diff
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|
393 // Use is_memory_serialization instead of si_addr. |
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|
394 ((NativeInstruction*)pc)->is_memory_serialization(thread, ucVoid)) { |
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parents:
diff
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|
395 // Synchronization problem in the pseudo memory barrier code (bug id 6546278) |
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parents:
diff
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|
396 // Block current thread until the memory serialize page permission restored. |
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parents:
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|
397 os::block_on_serialize_page_trap(); |
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parents:
diff
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|
398 return true; |
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parents:
diff
changeset
|
399 } |
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parents:
diff
changeset
|
400 } |
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parents:
diff
changeset
|
401 |
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parents:
diff
changeset
|
402 if (stub != NULL) { |
ec28f9c041ff
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parents:
diff
changeset
|
403 // Save all thread context in case we need to restore it. |
ec28f9c041ff
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parents:
diff
changeset
|
404 if (thread != NULL) thread->set_saved_exception_pc(pc); |
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parents:
diff
changeset
|
405 uc->uc_mcontext.regs->nip = (unsigned long)stub; |
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parents:
diff
changeset
|
406 return true; |
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parents:
diff
changeset
|
407 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
408 |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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changeset
|
409 // signal-chaining |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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changeset
|
410 if (os::Linux::chained_handler(sig, info, ucVoid)) { |
ec28f9c041ff
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parents:
diff
changeset
|
411 return true; |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
412 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
413 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
414 if (!abort_if_unrecognized) { |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
415 // caller wants another chance, so give it to him |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
416 return false; |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
417 } |
ec28f9c041ff
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parents:
diff
changeset
|
418 |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
419 if (pc == NULL && uc != NULL) { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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|
420 pc = os::Linux::ucontext_get_pc(uc); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
421 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
422 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
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|
423 report_and_die: |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
424 // unmask current signal |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
425 sigset_t newset; |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
426 sigemptyset(&newset); |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
427 sigaddset(&newset, sig); |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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|
428 sigprocmask(SIG_UNBLOCK, &newset, NULL); |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
429 |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
430 VMError err(t, sig, pc, info, ucVoid); |
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parents:
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|
431 err.report_and_die(); |
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parents:
diff
changeset
|
432 |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
433 ShouldNotReachHere(); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
434 return false; |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
435 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
436 |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
437 void os::Linux::init_thread_fpu_state(void) { |
ec28f9c041ff
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parents:
diff
changeset
|
438 // Disable FP exceptions. |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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|
439 __asm__ __volatile__ ("mtfsfi 6,0"); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
440 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
441 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
442 int os::Linux::get_fpu_control_word(void) { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
443 // x86 has problems with FPU precision after pthread_cond_timedwait(). |
ec28f9c041ff
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parents:
diff
changeset
|
444 // nothing to do on ppc64. |
ec28f9c041ff
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goetz
parents:
diff
changeset
|
445 return 0; |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
446 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
447 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
448 void os::Linux::set_fpu_control_word(int fpu_control) { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
449 // x86 has problems with FPU precision after pthread_cond_timedwait(). |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
450 // nothing to do on ppc64. |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
451 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
452 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
453 //////////////////////////////////////////////////////////////////////////////// |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
454 // thread stack |
ec28f9c041ff
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parents:
diff
changeset
|
455 |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
456 size_t os::Linux::min_stack_allowed = 768*K; |
ec28f9c041ff
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goetz
parents:
diff
changeset
|
457 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
458 bool os::Linux::supports_variable_stack_size() { return true; } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
459 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
460 // return default stack size for thr_type |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
461 size_t os::Linux::default_stack_size(os::ThreadType thr_type) { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
462 // default stack size (compiler thread needs larger stack) |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
463 // Notice that the setting for compiler threads here have no impact |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
464 // because of the strange 'fallback logic' in os::create_thread(). |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
465 // Better set CompilerThreadStackSize in globals_<os_cpu>.hpp if you want to |
ec28f9c041ff
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parents:
diff
changeset
|
466 // specify a different stack size for compiler threads! |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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|
467 size_t s = (thr_type == os::compiler_thread ? 4 * M : 1024 * K); |
ec28f9c041ff
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goetz
parents:
diff
changeset
|
468 return s; |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
469 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
470 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
471 size_t os::Linux::default_guard_size(os::ThreadType thr_type) { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
472 return 2 * page_size(); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
473 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
474 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
475 // Java thread: |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
476 // |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
477 // Low memory addresses |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
478 // +------------------------+ |
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parents:
diff
changeset
|
479 // | |\ JavaThread created by VM does not have glibc |
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parents:
diff
changeset
|
480 // | glibc guard page | - guard, attached Java thread usually has |
ec28f9c041ff
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goetz
parents:
diff
changeset
|
481 // | |/ 1 page glibc guard. |
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goetz
parents:
diff
changeset
|
482 // P1 +------------------------+ Thread::stack_base() - Thread::stack_size() |
ec28f9c041ff
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goetz
parents:
diff
changeset
|
483 // | |\ |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
484 // | HotSpot Guard Pages | - red and yellow pages |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
485 // | |/ |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
486 // +------------------------+ JavaThread::stack_yellow_zone_base() |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
487 // | |\ |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
488 // | Normal Stack | - |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
489 // | |/ |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
490 // P2 +------------------------+ Thread::stack_base() |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
491 // |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
492 // Non-Java thread: |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
493 // |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
494 // Low memory addresses |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
495 // +------------------------+ |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
496 // | |\ |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
497 // | glibc guard page | - usually 1 page |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
498 // | |/ |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
499 // P1 +------------------------+ Thread::stack_base() - Thread::stack_size() |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
500 // | |\ |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
501 // | Normal Stack | - |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
502 // | |/ |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
503 // P2 +------------------------+ Thread::stack_base() |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
504 // |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
505 // ** P1 (aka bottom) and size ( P2 = P1 - size) are the address and stack size returned from |
ec28f9c041ff
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goetz
parents:
diff
changeset
|
506 // pthread_attr_getstack() |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
507 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
508 static void current_stack_region(address * bottom, size_t * size) { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
changeset
|
509 if (os::Linux::is_initial_thread()) { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
510 // initial thread needs special handling because pthread_getattr_np() |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
511 // may return bogus value. |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
512 *bottom = os::Linux::initial_thread_stack_bottom(); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
513 *size = os::Linux::initial_thread_stack_size(); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
514 } else { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
515 pthread_attr_t attr; |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
516 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
517 int rslt = pthread_getattr_np(pthread_self(), &attr); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
518 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
519 // JVM needs to know exact stack location, abort if it fails |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
520 if (rslt != 0) { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
521 if (rslt == ENOMEM) { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
522 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "pthread_getattr_np"); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
523 } else { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
524 fatal(err_msg("pthread_getattr_np failed with errno = %d", rslt)); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
525 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
526 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
527 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
528 if (pthread_attr_getstack(&attr, (void **)bottom, size) != 0) { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
529 fatal("Can not locate current stack attributes!"); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
530 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
531 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
532 pthread_attr_destroy(&attr); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
533 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
534 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
535 assert(os::current_stack_pointer() >= *bottom && |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
536 os::current_stack_pointer() < *bottom + *size, "just checking"); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
537 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
538 |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
539 address os::current_stack_base() { |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
540 address bottom; |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
541 size_t size; |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
542 current_stack_region(&bottom, &size); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
543 return (bottom + size); |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
544 } |
ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff
changeset
|
545 |
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546 size_t os::current_stack_size() { |
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547 // stack size includes normal stack and HotSpot guard pages |
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548 address bottom; |
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549 size_t size; |
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550 current_stack_region(&bottom, &size); |
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551 return size; |
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552 } |
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553 |
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554 ///////////////////////////////////////////////////////////////////////////// |
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555 // helper functions for fatal error handler |
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556 |
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557 void os::print_context(outputStream *st, void *context) { |
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558 if (context == NULL) return; |
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559 |
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560 ucontext_t* uc = (ucontext_t*)context; |
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561 |
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562 st->print_cr("Registers:"); |
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563 st->print("pc =" INTPTR_FORMAT " ", uc->uc_mcontext.regs->nip); |
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564 st->print("lr =" INTPTR_FORMAT " ", uc->uc_mcontext.regs->link); |
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565 st->print("ctr=" INTPTR_FORMAT " ", uc->uc_mcontext.regs->ctr); |
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566 st->cr(); |
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567 for (int i = 0; i < 32; i++) { |
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568 st->print("r%-2d=" INTPTR_FORMAT " ", i, uc->uc_mcontext.regs->gpr[i]); |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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569 if (i % 3 == 2) st->cr(); |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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570 } |
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571 st->cr(); |
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572 st->cr(); |
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573 |
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574 intptr_t *sp = (intptr_t *)os::Linux::ucontext_get_sp(uc); |
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575 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); |
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576 print_hex_dump(st, (address)sp, (address)(sp + 128), sizeof(intptr_t)); |
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577 st->cr(); |
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578 |
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579 // Note: it may be unsafe to inspect memory near pc. For example, pc may |
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580 // point to garbage if entry point in an nmethod is corrupted. Leave |
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581 // this at the end, and hope for the best. |
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582 address pc = os::Linux::ucontext_get_pc(uc); |
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583 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); |
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584 print_hex_dump(st, pc - 64, pc + 64, /*instrsize=*/4); |
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585 st->cr(); |
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586 } |
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|
587 |
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588 void os::print_register_info(outputStream *st, void *context) { |
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589 if (context == NULL) return; |
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|
590 |
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591 ucontext_t *uc = (ucontext_t*)context; |
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parents:
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|
592 |
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593 st->print_cr("Register to memory mapping:"); |
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594 st->cr(); |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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|
595 |
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parents:
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596 // this is only for the "general purpose" registers |
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597 for (int i = 0; i < 32; i++) { |
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parents:
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598 st->print("r%-2d=", i); |
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parents:
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599 print_location(st, uc->uc_mcontext.regs->gpr[i]); |
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|
600 } |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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601 st->cr(); |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff
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|
602 } |
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|
603 |
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parents:
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|
604 extern "C" { |
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parents:
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|
605 int SpinPause() { |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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606 return 0; |
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parents:
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|
607 } |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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|
608 } |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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|
609 |
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parents:
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|
610 #ifndef PRODUCT |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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|
611 void os::verify_stack_alignment() { |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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612 assert(((intptr_t)os::current_stack_pointer() & (StackAlignmentInBytes-1)) == 0, "incorrect stack alignment"); |
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8019972: PPC64 (part 9): platform files for interpreter only VM.
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|
613 } |
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614 #endif |