annotate src/share/vm/runtime/thread.cpp @ 2014:4de5f4101cfd

Merge
author iveresov
date Wed, 08 Dec 2010 17:50:49 -0800
parents 828eafbd85cc f2da85a9b08e
children 06f017f7daa7 b1a2afa37ec4
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1 /*
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "classfile/classLoader.hpp"
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27 #include "classfile/javaClasses.hpp"
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28 #include "classfile/systemDictionary.hpp"
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29 #include "classfile/vmSymbols.hpp"
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30 #include "code/scopeDesc.hpp"
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31 #include "compiler/compileBroker.hpp"
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32 #include "interpreter/interpreter.hpp"
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33 #include "interpreter/linkResolver.hpp"
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34 #include "memory/oopFactory.hpp"
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35 #include "memory/universe.inline.hpp"
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36 #include "oops/instanceKlass.hpp"
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37 #include "oops/objArrayOop.hpp"
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38 #include "oops/oop.inline.hpp"
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39 #include "oops/symbolOop.hpp"
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40 #include "prims/jvm_misc.hpp"
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41 #include "prims/jvmtiExport.hpp"
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42 #include "prims/jvmtiThreadState.hpp"
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43 #include "prims/privilegedStack.hpp"
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44 #include "runtime/aprofiler.hpp"
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45 #include "runtime/arguments.hpp"
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46 #include "runtime/biasedLocking.hpp"
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47 #include "runtime/deoptimization.hpp"
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48 #include "runtime/fprofiler.hpp"
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49 #include "runtime/frame.inline.hpp"
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50 #include "runtime/init.hpp"
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51 #include "runtime/interfaceSupport.hpp"
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52 #include "runtime/java.hpp"
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53 #include "runtime/javaCalls.hpp"
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54 #include "runtime/jniPeriodicChecker.hpp"
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55 #include "runtime/memprofiler.hpp"
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56 #include "runtime/mutexLocker.hpp"
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57 #include "runtime/objectMonitor.hpp"
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58 #include "runtime/osThread.hpp"
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59 #include "runtime/safepoint.hpp"
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60 #include "runtime/sharedRuntime.hpp"
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61 #include "runtime/statSampler.hpp"
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62 #include "runtime/stubRoutines.hpp"
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63 #include "runtime/task.hpp"
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64 #include "runtime/threadCritical.hpp"
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65 #include "runtime/threadLocalStorage.hpp"
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66 #include "runtime/vframe.hpp"
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67 #include "runtime/vframeArray.hpp"
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68 #include "runtime/vframe_hp.hpp"
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69 #include "runtime/vmThread.hpp"
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70 #include "runtime/vm_operations.hpp"
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71 #include "services/attachListener.hpp"
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72 #include "services/management.hpp"
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73 #include "services/threadService.hpp"
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74 #include "utilities/defaultStream.hpp"
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75 #include "utilities/dtrace.hpp"
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76 #include "utilities/events.hpp"
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77 #include "utilities/preserveException.hpp"
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78 #ifdef TARGET_OS_FAMILY_linux
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79 # include "os_linux.inline.hpp"
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80 # include "thread_linux.inline.hpp"
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81 #endif
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82 #ifdef TARGET_OS_FAMILY_solaris
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83 # include "os_solaris.inline.hpp"
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84 # include "thread_solaris.inline.hpp"
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85 #endif
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86 #ifdef TARGET_OS_FAMILY_windows
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87 # include "os_windows.inline.hpp"
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88 # include "thread_windows.inline.hpp"
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89 #endif
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90 #ifndef SERIALGC
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91 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
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92 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp"
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93 #include "gc_implementation/parallelScavenge/pcTasks.hpp"
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94 #endif
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95 #ifdef COMPILER1
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96 #include "c1/c1_Compiler.hpp"
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97 #endif
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98 #ifdef COMPILER2
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99 #include "opto/c2compiler.hpp"
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100 #include "opto/idealGraphPrinter.hpp"
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101 #endif
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102
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103 #ifdef DTRACE_ENABLED
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104
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105 // Only bother with this argument setup if dtrace is available
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106
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107 HS_DTRACE_PROBE_DECL(hotspot, vm__init__begin);
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108 HS_DTRACE_PROBE_DECL(hotspot, vm__init__end);
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109 HS_DTRACE_PROBE_DECL5(hotspot, thread__start, char*, intptr_t,
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110 intptr_t, intptr_t, bool);
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111 HS_DTRACE_PROBE_DECL5(hotspot, thread__stop, char*, intptr_t,
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112 intptr_t, intptr_t, bool);
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113
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114 #define DTRACE_THREAD_PROBE(probe, javathread) \
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115 { \
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116 ResourceMark rm(this); \
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117 int len = 0; \
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118 const char* name = (javathread)->get_thread_name(); \
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119 len = strlen(name); \
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120 HS_DTRACE_PROBE5(hotspot, thread__##probe, \
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121 name, len, \
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122 java_lang_Thread::thread_id((javathread)->threadObj()), \
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123 (javathread)->osthread()->thread_id(), \
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124 java_lang_Thread::is_daemon((javathread)->threadObj())); \
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125 }
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126
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127 #else // ndef DTRACE_ENABLED
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128
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129 #define DTRACE_THREAD_PROBE(probe, javathread)
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130
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131 #endif // ndef DTRACE_ENABLED
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132
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133 // Class hierarchy
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134 // - Thread
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135 // - VMThread
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136 // - WatcherThread
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137 // - ConcurrentMarkSweepThread
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138 // - JavaThread
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139 // - CompilerThread
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140
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141 // ======= Thread ========
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142
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143 // Support for forcing alignment of thread objects for biased locking
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144 void* Thread::operator new(size_t size) {
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145 if (UseBiasedLocking) {
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146 const int alignment = markOopDesc::biased_lock_alignment;
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147 size_t aligned_size = size + (alignment - sizeof(intptr_t));
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148 void* real_malloc_addr = CHeapObj::operator new(aligned_size);
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149 void* aligned_addr = (void*) align_size_up((intptr_t) real_malloc_addr, alignment);
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150 assert(((uintptr_t) aligned_addr + (uintptr_t) size) <=
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151 ((uintptr_t) real_malloc_addr + (uintptr_t) aligned_size),
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152 "JavaThread alignment code overflowed allocated storage");
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153 if (TraceBiasedLocking) {
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154 if (aligned_addr != real_malloc_addr)
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155 tty->print_cr("Aligned thread " INTPTR_FORMAT " to " INTPTR_FORMAT,
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156 real_malloc_addr, aligned_addr);
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157 }
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158 ((Thread*) aligned_addr)->_real_malloc_address = real_malloc_addr;
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159 return aligned_addr;
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160 } else {
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161 return CHeapObj::operator new(size);
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162 }
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163 }
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164
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165 void Thread::operator delete(void* p) {
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166 if (UseBiasedLocking) {
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167 void* real_malloc_addr = ((Thread*) p)->_real_malloc_address;
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168 CHeapObj::operator delete(real_malloc_addr);
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169 } else {
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170 CHeapObj::operator delete(p);
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171 }
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172 }
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173
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174
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175 // Base class for all threads: VMThread, WatcherThread, ConcurrentMarkSweepThread,
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176 // JavaThread
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177
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178
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179 Thread::Thread() {
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180 // stack
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181 _stack_base = NULL;
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182 _stack_size = 0;
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183 _self_raw_id = 0;
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184 _lgrp_id = -1;
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185 _osthread = NULL;
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186
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187 // allocated data structures
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188 set_resource_area(new ResourceArea());
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189 set_handle_area(new HandleArea(NULL));
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190 set_active_handles(NULL);
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191 set_free_handle_block(NULL);
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192 set_last_handle_mark(NULL);
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193 set_osthread(NULL);
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194
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195 // This initial value ==> never claimed.
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196 _oops_do_parity = 0;
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197
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198 // the handle mark links itself to last_handle_mark
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199 new HandleMark(this);
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200
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201 // plain initialization
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202 debug_only(_owned_locks = NULL;)
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203 debug_only(_allow_allocation_count = 0;)
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204 NOT_PRODUCT(_allow_safepoint_count = 0;)
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205 NOT_PRODUCT(_skip_gcalot = false;)
0
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206 CHECK_UNHANDLED_OOPS_ONLY(_gc_locked_out_count = 0;)
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207 _jvmti_env_iteration_count = 0;
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208 _vm_operation_started_count = 0;
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209 _vm_operation_completed_count = 0;
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210 _current_pending_monitor = NULL;
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211 _current_pending_monitor_is_from_java = true;
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212 _current_waiting_monitor = NULL;
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213 _num_nested_signal = 0;
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214 omFreeList = NULL ;
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215 omFreeCount = 0 ;
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216 omFreeProvision = 32 ;
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217 omInUseList = NULL ;
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218 omInUseCount = 0 ;
0
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219
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220 _SR_lock = new Monitor(Mutex::suspend_resume, "SR_lock", true);
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221 _suspend_flags = 0;
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222
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223 // thread-specific hashCode stream generator state - Marsaglia shift-xor form
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224 _hashStateX = os::random() ;
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225 _hashStateY = 842502087 ;
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226 _hashStateZ = 0x8767 ; // (int)(3579807591LL & 0xffff) ;
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227 _hashStateW = 273326509 ;
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228
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229 _OnTrap = 0 ;
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230 _schedctl = NULL ;
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231 _Stalled = 0 ;
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232 _TypeTag = 0x2BAD ;
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233
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234 // Many of the following fields are effectively final - immutable
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235 // Note that nascent threads can't use the Native Monitor-Mutex
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236 // construct until the _MutexEvent is initialized ...
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237 // CONSIDER: instead of using a fixed set of purpose-dedicated ParkEvents
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238 // we might instead use a stack of ParkEvents that we could provision on-demand.
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239 // The stack would act as a cache to avoid calls to ParkEvent::Allocate()
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240 // and ::Release()
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241 _ParkEvent = ParkEvent::Allocate (this) ;
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242 _SleepEvent = ParkEvent::Allocate (this) ;
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243 _MutexEvent = ParkEvent::Allocate (this) ;
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244 _MuxEvent = ParkEvent::Allocate (this) ;
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245
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246 #ifdef CHECK_UNHANDLED_OOPS
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247 if (CheckUnhandledOops) {
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248 _unhandled_oops = new UnhandledOops(this);
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249 }
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250 #endif // CHECK_UNHANDLED_OOPS
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251 #ifdef ASSERT
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252 if (UseBiasedLocking) {
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253 assert((((uintptr_t) this) & (markOopDesc::biased_lock_alignment - 1)) == 0, "forced alignment of thread object failed");
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254 assert(this == _real_malloc_address ||
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255 this == (void*) align_size_up((intptr_t) _real_malloc_address, markOopDesc::biased_lock_alignment),
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256 "bug in forced alignment of thread objects");
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257 }
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258 #endif /* ASSERT */
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259 }
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260
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261 void Thread::initialize_thread_local_storage() {
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262 // Note: Make sure this method only calls
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263 // non-blocking operations. Otherwise, it might not work
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264 // with the thread-startup/safepoint interaction.
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265
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266 // During Java thread startup, safepoint code should allow this
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267 // method to complete because it may need to allocate memory to
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268 // store information for the new thread.
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269
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270 // initialize structure dependent on thread local storage
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271 ThreadLocalStorage::set_thread(this);
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272
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273 // set up any platform-specific state.
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274 os::initialize_thread();
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275
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276 }
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277
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278 void Thread::record_stack_base_and_size() {
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279 set_stack_base(os::current_stack_base());
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280 set_stack_size(os::current_stack_size());
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281 }
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282
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283
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284 Thread::~Thread() {
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285 // Reclaim the objectmonitors from the omFreeList of the moribund thread.
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286 ObjectSynchronizer::omFlush (this) ;
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287
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288 // deallocate data structures
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289 delete resource_area();
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290 // since the handle marks are using the handle area, we have to deallocated the root
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291 // handle mark before deallocating the thread's handle area,
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292 assert(last_handle_mark() != NULL, "check we have an element");
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293 delete last_handle_mark();
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294 assert(last_handle_mark() == NULL, "check we have reached the end");
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295
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296 // It's possible we can encounter a null _ParkEvent, etc., in stillborn threads.
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297 // We NULL out the fields for good hygiene.
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298 ParkEvent::Release (_ParkEvent) ; _ParkEvent = NULL ;
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299 ParkEvent::Release (_SleepEvent) ; _SleepEvent = NULL ;
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300 ParkEvent::Release (_MutexEvent) ; _MutexEvent = NULL ;
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301 ParkEvent::Release (_MuxEvent) ; _MuxEvent = NULL ;
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302
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303 delete handle_area();
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304
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305 // osthread() can be NULL, if creation of thread failed.
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306 if (osthread() != NULL) os::free_thread(osthread());
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307
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308 delete _SR_lock;
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309
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310 // clear thread local storage if the Thread is deleting itself
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311 if (this == Thread::current()) {
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312 ThreadLocalStorage::set_thread(NULL);
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313 } else {
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314 // In the case where we're not the current thread, invalidate all the
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315 // caches in case some code tries to get the current thread or the
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316 // thread that was destroyed, and gets stale information.
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317 ThreadLocalStorage::invalidate_all();
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318 }
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319 CHECK_UNHANDLED_OOPS_ONLY(if (CheckUnhandledOops) delete unhandled_oops();)
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320 }
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321
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322 // NOTE: dummy function for assertion purpose.
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323 void Thread::run() {
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324 ShouldNotReachHere();
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325 }
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326
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327 #ifdef ASSERT
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328 // Private method to check for dangling thread pointer
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329 void check_for_dangling_thread_pointer(Thread *thread) {
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330 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(),
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331 "possibility of dangling Thread pointer");
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332 }
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333 #endif
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334
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335
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336 #ifndef PRODUCT
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337 // Tracing method for basic thread operations
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338 void Thread::trace(const char* msg, const Thread* const thread) {
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339 if (!TraceThreadEvents) return;
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340 ResourceMark rm;
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341 ThreadCritical tc;
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342 const char *name = "non-Java thread";
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343 int prio = -1;
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344 if (thread->is_Java_thread()
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345 && !thread->is_Compiler_thread()) {
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346 // The Threads_lock must be held to get information about
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347 // this thread but may not be in some situations when
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348 // tracing thread events.
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349 bool release_Threads_lock = false;
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350 if (!Threads_lock->owned_by_self()) {
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351 Threads_lock->lock();
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352 release_Threads_lock = true;
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353 }
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354 JavaThread* jt = (JavaThread *)thread;
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355 name = (char *)jt->get_thread_name();
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356 oop thread_oop = jt->threadObj();
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357 if (thread_oop != NULL) {
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358 prio = java_lang_Thread::priority(thread_oop);
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359 }
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360 if (release_Threads_lock) {
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361 Threads_lock->unlock();
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362 }
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363 }
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364 tty->print_cr("Thread::%s " INTPTR_FORMAT " [%lx] %s (prio: %d)", msg, thread, thread->osthread()->thread_id(), name, prio);
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365 }
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366 #endif
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367
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368
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369 ThreadPriority Thread::get_priority(const Thread* const thread) {
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370 trace("get priority", thread);
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371 ThreadPriority priority;
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372 // Can return an error!
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373 (void)os::get_priority(thread, priority);
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374 assert(MinPriority <= priority && priority <= MaxPriority, "non-Java priority found");
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375 return priority;
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376 }
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377
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378 void Thread::set_priority(Thread* thread, ThreadPriority priority) {
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379 trace("set priority", thread);
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380 debug_only(check_for_dangling_thread_pointer(thread);)
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381 // Can return an error!
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382 (void)os::set_priority(thread, priority);
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383 }
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384
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385
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386 void Thread::start(Thread* thread) {
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387 trace("start", thread);
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388 // Start is different from resume in that its safety is guaranteed by context or
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389 // being called from a Java method synchronized on the Thread object.
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390 if (!DisableStartThread) {
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391 if (thread->is_Java_thread()) {
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392 // Initialize the thread state to RUNNABLE before starting this thread.
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393 // Can not set it after the thread started because we do not know the
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394 // exact thread state at that time. It could be in MONITOR_WAIT or
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395 // in SLEEPING or some other state.
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396 java_lang_Thread::set_thread_status(((JavaThread*)thread)->threadObj(),
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397 java_lang_Thread::RUNNABLE);
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398 }
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399 os::start_thread(thread);
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400 }
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401 }
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402
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403 // Enqueue a VM_Operation to do the job for us - sometime later
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404 void Thread::send_async_exception(oop java_thread, oop java_throwable) {
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405 VM_ThreadStop* vm_stop = new VM_ThreadStop(java_thread, java_throwable);
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406 VMThread::execute(vm_stop);
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407 }
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408
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409
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410 //
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411 // Check if an external suspend request has completed (or has been
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412 // cancelled). Returns true if the thread is externally suspended and
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413 // false otherwise.
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414 //
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parents:
diff changeset
415 // The bits parameter returns information about the code path through
a61af66fc99e Initial load
duke
parents:
diff changeset
416 // the routine. Useful for debugging:
a61af66fc99e Initial load
duke
parents:
diff changeset
417 //
a61af66fc99e Initial load
duke
parents:
diff changeset
418 // set in is_ext_suspend_completed():
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duke
parents:
diff changeset
419 // 0x00000001 - routine was entered
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duke
parents:
diff changeset
420 // 0x00000010 - routine return false at end
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duke
parents:
diff changeset
421 // 0x00000100 - thread exited (return false)
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duke
parents:
diff changeset
422 // 0x00000200 - suspend request cancelled (return false)
a61af66fc99e Initial load
duke
parents:
diff changeset
423 // 0x00000400 - thread suspended (return true)
a61af66fc99e Initial load
duke
parents:
diff changeset
424 // 0x00001000 - thread is in a suspend equivalent state (return true)
a61af66fc99e Initial load
duke
parents:
diff changeset
425 // 0x00002000 - thread is native and walkable (return true)
a61af66fc99e Initial load
duke
parents:
diff changeset
426 // 0x00004000 - thread is native_trans and walkable (needed retry)
a61af66fc99e Initial load
duke
parents:
diff changeset
427 //
a61af66fc99e Initial load
duke
parents:
diff changeset
428 // set in wait_for_ext_suspend_completion():
a61af66fc99e Initial load
duke
parents:
diff changeset
429 // 0x00010000 - routine was entered
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duke
parents:
diff changeset
430 // 0x00020000 - suspend request cancelled before loop (return false)
a61af66fc99e Initial load
duke
parents:
diff changeset
431 // 0x00040000 - thread suspended before loop (return true)
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duke
parents:
diff changeset
432 // 0x00080000 - suspend request cancelled in loop (return false)
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duke
parents:
diff changeset
433 // 0x00100000 - thread suspended in loop (return true)
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duke
parents:
diff changeset
434 // 0x00200000 - suspend not completed during retry loop (return false)
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duke
parents:
diff changeset
435 //
a61af66fc99e Initial load
duke
parents:
diff changeset
436
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duke
parents:
diff changeset
437 // Helper class for tracing suspend wait debug bits.
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duke
parents:
diff changeset
438 //
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duke
parents:
diff changeset
439 // 0x00000100 indicates that the target thread exited before it could
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duke
parents:
diff changeset
440 // self-suspend which is not a wait failure. 0x00000200, 0x00020000 and
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duke
parents:
diff changeset
441 // 0x00080000 each indicate a cancelled suspend request so they don't
a61af66fc99e Initial load
duke
parents:
diff changeset
442 // count as wait failures either.
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duke
parents:
diff changeset
443 #define DEBUG_FALSE_BITS (0x00000010 | 0x00200000)
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parents:
diff changeset
444
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duke
parents:
diff changeset
445 class TraceSuspendDebugBits : public StackObj {
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parents:
diff changeset
446 private:
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duke
parents:
diff changeset
447 JavaThread * jt;
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duke
parents:
diff changeset
448 bool is_wait;
a61af66fc99e Initial load
duke
parents:
diff changeset
449 bool called_by_wait; // meaningful when !is_wait
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duke
parents:
diff changeset
450 uint32_t * bits;
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duke
parents:
diff changeset
451
a61af66fc99e Initial load
duke
parents:
diff changeset
452 public:
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parents:
diff changeset
453 TraceSuspendDebugBits(JavaThread *_jt, bool _is_wait, bool _called_by_wait,
a61af66fc99e Initial load
duke
parents:
diff changeset
454 uint32_t *_bits) {
a61af66fc99e Initial load
duke
parents:
diff changeset
455 jt = _jt;
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duke
parents:
diff changeset
456 is_wait = _is_wait;
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duke
parents:
diff changeset
457 called_by_wait = _called_by_wait;
a61af66fc99e Initial load
duke
parents:
diff changeset
458 bits = _bits;
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duke
parents:
diff changeset
459 }
a61af66fc99e Initial load
duke
parents:
diff changeset
460
a61af66fc99e Initial load
duke
parents:
diff changeset
461 ~TraceSuspendDebugBits() {
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duke
parents:
diff changeset
462 if (!is_wait) {
a61af66fc99e Initial load
duke
parents:
diff changeset
463 #if 1
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duke
parents:
diff changeset
464 // By default, don't trace bits for is_ext_suspend_completed() calls.
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duke
parents:
diff changeset
465 // That trace is very chatty.
a61af66fc99e Initial load
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parents:
diff changeset
466 return;
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duke
parents:
diff changeset
467 #else
a61af66fc99e Initial load
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parents:
diff changeset
468 if (!called_by_wait) {
a61af66fc99e Initial load
duke
parents:
diff changeset
469 // If tracing for is_ext_suspend_completed() is enabled, then only
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duke
parents:
diff changeset
470 // trace calls to it from wait_for_ext_suspend_completion()
a61af66fc99e Initial load
duke
parents:
diff changeset
471 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
472 }
a61af66fc99e Initial load
duke
parents:
diff changeset
473 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
474 }
a61af66fc99e Initial load
duke
parents:
diff changeset
475
a61af66fc99e Initial load
duke
parents:
diff changeset
476 if (AssertOnSuspendWaitFailure || TraceSuspendWaitFailures) {
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duke
parents:
diff changeset
477 if (bits != NULL && (*bits & DEBUG_FALSE_BITS) != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
478 MutexLocker ml(Threads_lock); // needed for get_thread_name()
a61af66fc99e Initial load
duke
parents:
diff changeset
479 ResourceMark rm;
a61af66fc99e Initial load
duke
parents:
diff changeset
480
a61af66fc99e Initial load
duke
parents:
diff changeset
481 tty->print_cr(
a61af66fc99e Initial load
duke
parents:
diff changeset
482 "Failed wait_for_ext_suspend_completion(thread=%s, debug_bits=%x)",
a61af66fc99e Initial load
duke
parents:
diff changeset
483 jt->get_thread_name(), *bits);
a61af66fc99e Initial load
duke
parents:
diff changeset
484
a61af66fc99e Initial load
duke
parents:
diff changeset
485 guarantee(!AssertOnSuspendWaitFailure, "external suspend wait failed");
a61af66fc99e Initial load
duke
parents:
diff changeset
486 }
a61af66fc99e Initial load
duke
parents:
diff changeset
487 }
a61af66fc99e Initial load
duke
parents:
diff changeset
488 }
a61af66fc99e Initial load
duke
parents:
diff changeset
489 };
a61af66fc99e Initial load
duke
parents:
diff changeset
490 #undef DEBUG_FALSE_BITS
a61af66fc99e Initial load
duke
parents:
diff changeset
491
a61af66fc99e Initial load
duke
parents:
diff changeset
492
a61af66fc99e Initial load
duke
parents:
diff changeset
493 bool JavaThread::is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits) {
a61af66fc99e Initial load
duke
parents:
diff changeset
494 TraceSuspendDebugBits tsdb(this, false /* !is_wait */, called_by_wait, bits);
a61af66fc99e Initial load
duke
parents:
diff changeset
495
a61af66fc99e Initial load
duke
parents:
diff changeset
496 bool did_trans_retry = false; // only do thread_in_native_trans retry once
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duke
parents:
diff changeset
497 bool do_trans_retry; // flag to force the retry
a61af66fc99e Initial load
duke
parents:
diff changeset
498
a61af66fc99e Initial load
duke
parents:
diff changeset
499 *bits |= 0x00000001;
a61af66fc99e Initial load
duke
parents:
diff changeset
500
a61af66fc99e Initial load
duke
parents:
diff changeset
501 do {
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parents:
diff changeset
502 do_trans_retry = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
503
a61af66fc99e Initial load
duke
parents:
diff changeset
504 if (is_exiting()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
505 // Thread is in the process of exiting. This is always checked
a61af66fc99e Initial load
duke
parents:
diff changeset
506 // first to reduce the risk of dereferencing a freed JavaThread.
a61af66fc99e Initial load
duke
parents:
diff changeset
507 *bits |= 0x00000100;
a61af66fc99e Initial load
duke
parents:
diff changeset
508 return false;
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duke
parents:
diff changeset
509 }
a61af66fc99e Initial load
duke
parents:
diff changeset
510
a61af66fc99e Initial load
duke
parents:
diff changeset
511 if (!is_external_suspend()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
512 // Suspend request is cancelled. This is always checked before
a61af66fc99e Initial load
duke
parents:
diff changeset
513 // is_ext_suspended() to reduce the risk of a rogue resume
a61af66fc99e Initial load
duke
parents:
diff changeset
514 // confusing the thread that made the suspend request.
a61af66fc99e Initial load
duke
parents:
diff changeset
515 *bits |= 0x00000200;
a61af66fc99e Initial load
duke
parents:
diff changeset
516 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
517 }
a61af66fc99e Initial load
duke
parents:
diff changeset
518
a61af66fc99e Initial load
duke
parents:
diff changeset
519 if (is_ext_suspended()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
520 // thread is suspended
a61af66fc99e Initial load
duke
parents:
diff changeset
521 *bits |= 0x00000400;
a61af66fc99e Initial load
duke
parents:
diff changeset
522 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
523 }
a61af66fc99e Initial load
duke
parents:
diff changeset
524
a61af66fc99e Initial load
duke
parents:
diff changeset
525 // Now that we no longer do hard suspends of threads running
a61af66fc99e Initial load
duke
parents:
diff changeset
526 // native code, the target thread can be changing thread state
a61af66fc99e Initial load
duke
parents:
diff changeset
527 // while we are in this routine:
a61af66fc99e Initial load
duke
parents:
diff changeset
528 //
a61af66fc99e Initial load
duke
parents:
diff changeset
529 // _thread_in_native -> _thread_in_native_trans -> _thread_blocked
a61af66fc99e Initial load
duke
parents:
diff changeset
530 //
a61af66fc99e Initial load
duke
parents:
diff changeset
531 // We save a copy of the thread state as observed at this moment
a61af66fc99e Initial load
duke
parents:
diff changeset
532 // and make our decision about suspend completeness based on the
a61af66fc99e Initial load
duke
parents:
diff changeset
533 // copy. This closes the race where the thread state is seen as
a61af66fc99e Initial load
duke
parents:
diff changeset
534 // _thread_in_native_trans in the if-thread_blocked check, but is
a61af66fc99e Initial load
duke
parents:
diff changeset
535 // seen as _thread_blocked in if-thread_in_native_trans check.
a61af66fc99e Initial load
duke
parents:
diff changeset
536 JavaThreadState save_state = thread_state();
a61af66fc99e Initial load
duke
parents:
diff changeset
537
a61af66fc99e Initial load
duke
parents:
diff changeset
538 if (save_state == _thread_blocked && is_suspend_equivalent()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
539 // If the thread's state is _thread_blocked and this blocking
a61af66fc99e Initial load
duke
parents:
diff changeset
540 // condition is known to be equivalent to a suspend, then we can
a61af66fc99e Initial load
duke
parents:
diff changeset
541 // consider the thread to be externally suspended. This means that
a61af66fc99e Initial load
duke
parents:
diff changeset
542 // the code that sets _thread_blocked has been modified to do
a61af66fc99e Initial load
duke
parents:
diff changeset
543 // self-suspension if the blocking condition releases. We also
a61af66fc99e Initial load
duke
parents:
diff changeset
544 // used to check for CONDVAR_WAIT here, but that is now covered by
a61af66fc99e Initial load
duke
parents:
diff changeset
545 // the _thread_blocked with self-suspension check.
a61af66fc99e Initial load
duke
parents:
diff changeset
546 //
a61af66fc99e Initial load
duke
parents:
diff changeset
547 // Return true since we wouldn't be here unless there was still an
a61af66fc99e Initial load
duke
parents:
diff changeset
548 // external suspend request.
a61af66fc99e Initial load
duke
parents:
diff changeset
549 *bits |= 0x00001000;
a61af66fc99e Initial load
duke
parents:
diff changeset
550 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
551 } else if (save_state == _thread_in_native && frame_anchor()->walkable()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
552 // Threads running native code will self-suspend on native==>VM/Java
a61af66fc99e Initial load
duke
parents:
diff changeset
553 // transitions. If its stack is walkable (should always be the case
a61af66fc99e Initial load
duke
parents:
diff changeset
554 // unless this function is called before the actual java_suspend()
a61af66fc99e Initial load
duke
parents:
diff changeset
555 // call), then the wait is done.
a61af66fc99e Initial load
duke
parents:
diff changeset
556 *bits |= 0x00002000;
a61af66fc99e Initial load
duke
parents:
diff changeset
557 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
558 } else if (!called_by_wait && !did_trans_retry &&
a61af66fc99e Initial load
duke
parents:
diff changeset
559 save_state == _thread_in_native_trans &&
a61af66fc99e Initial load
duke
parents:
diff changeset
560 frame_anchor()->walkable()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
561 // The thread is transitioning from thread_in_native to another
a61af66fc99e Initial load
duke
parents:
diff changeset
562 // thread state. check_safepoint_and_suspend_for_native_trans()
a61af66fc99e Initial load
duke
parents:
diff changeset
563 // will force the thread to self-suspend. If it hasn't gotten
a61af66fc99e Initial load
duke
parents:
diff changeset
564 // there yet we may have caught the thread in-between the native
a61af66fc99e Initial load
duke
parents:
diff changeset
565 // code check above and the self-suspend. Lucky us. If we were
a61af66fc99e Initial load
duke
parents:
diff changeset
566 // called by wait_for_ext_suspend_completion(), then it
a61af66fc99e Initial load
duke
parents:
diff changeset
567 // will be doing the retries so we don't have to.
a61af66fc99e Initial load
duke
parents:
diff changeset
568 //
a61af66fc99e Initial load
duke
parents:
diff changeset
569 // Since we use the saved thread state in the if-statement above,
a61af66fc99e Initial load
duke
parents:
diff changeset
570 // there is a chance that the thread has already transitioned to
a61af66fc99e Initial load
duke
parents:
diff changeset
571 // _thread_blocked by the time we get here. In that case, we will
a61af66fc99e Initial load
duke
parents:
diff changeset
572 // make a single unnecessary pass through the logic below. This
a61af66fc99e Initial load
duke
parents:
diff changeset
573 // doesn't hurt anything since we still do the trans retry.
a61af66fc99e Initial load
duke
parents:
diff changeset
574
a61af66fc99e Initial load
duke
parents:
diff changeset
575 *bits |= 0x00004000;
a61af66fc99e Initial load
duke
parents:
diff changeset
576
a61af66fc99e Initial load
duke
parents:
diff changeset
577 // Once the thread leaves thread_in_native_trans for another
a61af66fc99e Initial load
duke
parents:
diff changeset
578 // thread state, we break out of this retry loop. We shouldn't
a61af66fc99e Initial load
duke
parents:
diff changeset
579 // need this flag to prevent us from getting back here, but
a61af66fc99e Initial load
duke
parents:
diff changeset
580 // sometimes paranoia is good.
a61af66fc99e Initial load
duke
parents:
diff changeset
581 did_trans_retry = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
582
a61af66fc99e Initial load
duke
parents:
diff changeset
583 // We wait for the thread to transition to a more usable state.
a61af66fc99e Initial load
duke
parents:
diff changeset
584 for (int i = 1; i <= SuspendRetryCount; i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
585 // We used to do an "os::yield_all(i)" call here with the intention
a61af66fc99e Initial load
duke
parents:
diff changeset
586 // that yielding would increase on each retry. However, the parameter
a61af66fc99e Initial load
duke
parents:
diff changeset
587 // is ignored on Linux which means the yield didn't scale up. Waiting
a61af66fc99e Initial load
duke
parents:
diff changeset
588 // on the SR_lock below provides a much more predictable scale up for
a61af66fc99e Initial load
duke
parents:
diff changeset
589 // the delay. It also provides a simple/direct point to check for any
a61af66fc99e Initial load
duke
parents:
diff changeset
590 // safepoint requests from the VMThread
a61af66fc99e Initial load
duke
parents:
diff changeset
591
a61af66fc99e Initial load
duke
parents:
diff changeset
592 // temporarily drops SR_lock while doing wait with safepoint check
a61af66fc99e Initial load
duke
parents:
diff changeset
593 // (if we're a JavaThread - the WatcherThread can also call this)
a61af66fc99e Initial load
duke
parents:
diff changeset
594 // and increase delay with each retry
a61af66fc99e Initial load
duke
parents:
diff changeset
595 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay);
a61af66fc99e Initial load
duke
parents:
diff changeset
596
a61af66fc99e Initial load
duke
parents:
diff changeset
597 // check the actual thread state instead of what we saved above
a61af66fc99e Initial load
duke
parents:
diff changeset
598 if (thread_state() != _thread_in_native_trans) {
a61af66fc99e Initial load
duke
parents:
diff changeset
599 // the thread has transitioned to another thread state so
a61af66fc99e Initial load
duke
parents:
diff changeset
600 // try all the checks (except this one) one more time.
a61af66fc99e Initial load
duke
parents:
diff changeset
601 do_trans_retry = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
602 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
603 }
a61af66fc99e Initial load
duke
parents:
diff changeset
604 } // end retry loop
a61af66fc99e Initial load
duke
parents:
diff changeset
605
a61af66fc99e Initial load
duke
parents:
diff changeset
606
a61af66fc99e Initial load
duke
parents:
diff changeset
607 }
a61af66fc99e Initial load
duke
parents:
diff changeset
608 } while (do_trans_retry);
a61af66fc99e Initial load
duke
parents:
diff changeset
609
a61af66fc99e Initial load
duke
parents:
diff changeset
610 *bits |= 0x00000010;
a61af66fc99e Initial load
duke
parents:
diff changeset
611 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
612 }
a61af66fc99e Initial load
duke
parents:
diff changeset
613
a61af66fc99e Initial load
duke
parents:
diff changeset
614 //
a61af66fc99e Initial load
duke
parents:
diff changeset
615 // Wait for an external suspend request to complete (or be cancelled).
a61af66fc99e Initial load
duke
parents:
diff changeset
616 // Returns true if the thread is externally suspended and false otherwise.
a61af66fc99e Initial load
duke
parents:
diff changeset
617 //
a61af66fc99e Initial load
duke
parents:
diff changeset
618 bool JavaThread::wait_for_ext_suspend_completion(int retries, int delay,
a61af66fc99e Initial load
duke
parents:
diff changeset
619 uint32_t *bits) {
a61af66fc99e Initial load
duke
parents:
diff changeset
620 TraceSuspendDebugBits tsdb(this, true /* is_wait */,
a61af66fc99e Initial load
duke
parents:
diff changeset
621 false /* !called_by_wait */, bits);
a61af66fc99e Initial load
duke
parents:
diff changeset
622
a61af66fc99e Initial load
duke
parents:
diff changeset
623 // local flag copies to minimize SR_lock hold time
a61af66fc99e Initial load
duke
parents:
diff changeset
624 bool is_suspended;
a61af66fc99e Initial load
duke
parents:
diff changeset
625 bool pending;
a61af66fc99e Initial load
duke
parents:
diff changeset
626 uint32_t reset_bits;
a61af66fc99e Initial load
duke
parents:
diff changeset
627
a61af66fc99e Initial load
duke
parents:
diff changeset
628 // set a marker so is_ext_suspend_completed() knows we are the caller
a61af66fc99e Initial load
duke
parents:
diff changeset
629 *bits |= 0x00010000;
a61af66fc99e Initial load
duke
parents:
diff changeset
630
a61af66fc99e Initial load
duke
parents:
diff changeset
631 // We use reset_bits to reinitialize the bits value at the top of
a61af66fc99e Initial load
duke
parents:
diff changeset
632 // each retry loop. This allows the caller to make use of any
a61af66fc99e Initial load
duke
parents:
diff changeset
633 // unused bits for their own marking purposes.
a61af66fc99e Initial load
duke
parents:
diff changeset
634 reset_bits = *bits;
a61af66fc99e Initial load
duke
parents:
diff changeset
635
a61af66fc99e Initial load
duke
parents:
diff changeset
636 {
a61af66fc99e Initial load
duke
parents:
diff changeset
637 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
638 is_suspended = is_ext_suspend_completed(true /* called_by_wait */,
a61af66fc99e Initial load
duke
parents:
diff changeset
639 delay, bits);
a61af66fc99e Initial load
duke
parents:
diff changeset
640 pending = is_external_suspend();
a61af66fc99e Initial load
duke
parents:
diff changeset
641 }
a61af66fc99e Initial load
duke
parents:
diff changeset
642 // must release SR_lock to allow suspension to complete
a61af66fc99e Initial load
duke
parents:
diff changeset
643
a61af66fc99e Initial load
duke
parents:
diff changeset
644 if (!pending) {
a61af66fc99e Initial load
duke
parents:
diff changeset
645 // A cancelled suspend request is the only false return from
a61af66fc99e Initial load
duke
parents:
diff changeset
646 // is_ext_suspend_completed() that keeps us from entering the
a61af66fc99e Initial load
duke
parents:
diff changeset
647 // retry loop.
a61af66fc99e Initial load
duke
parents:
diff changeset
648 *bits |= 0x00020000;
a61af66fc99e Initial load
duke
parents:
diff changeset
649 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
650 }
a61af66fc99e Initial load
duke
parents:
diff changeset
651
a61af66fc99e Initial load
duke
parents:
diff changeset
652 if (is_suspended) {
a61af66fc99e Initial load
duke
parents:
diff changeset
653 *bits |= 0x00040000;
a61af66fc99e Initial load
duke
parents:
diff changeset
654 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
655 }
a61af66fc99e Initial load
duke
parents:
diff changeset
656
a61af66fc99e Initial load
duke
parents:
diff changeset
657 for (int i = 1; i <= retries; i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
658 *bits = reset_bits; // reinit to only track last retry
a61af66fc99e Initial load
duke
parents:
diff changeset
659
a61af66fc99e Initial load
duke
parents:
diff changeset
660 // We used to do an "os::yield_all(i)" call here with the intention
a61af66fc99e Initial load
duke
parents:
diff changeset
661 // that yielding would increase on each retry. However, the parameter
a61af66fc99e Initial load
duke
parents:
diff changeset
662 // is ignored on Linux which means the yield didn't scale up. Waiting
a61af66fc99e Initial load
duke
parents:
diff changeset
663 // on the SR_lock below provides a much more predictable scale up for
a61af66fc99e Initial load
duke
parents:
diff changeset
664 // the delay. It also provides a simple/direct point to check for any
a61af66fc99e Initial load
duke
parents:
diff changeset
665 // safepoint requests from the VMThread
a61af66fc99e Initial load
duke
parents:
diff changeset
666
a61af66fc99e Initial load
duke
parents:
diff changeset
667 {
a61af66fc99e Initial load
duke
parents:
diff changeset
668 MutexLocker ml(SR_lock());
a61af66fc99e Initial load
duke
parents:
diff changeset
669 // wait with safepoint check (if we're a JavaThread - the WatcherThread
a61af66fc99e Initial load
duke
parents:
diff changeset
670 // can also call this) and increase delay with each retry
a61af66fc99e Initial load
duke
parents:
diff changeset
671 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay);
a61af66fc99e Initial load
duke
parents:
diff changeset
672
a61af66fc99e Initial load
duke
parents:
diff changeset
673 is_suspended = is_ext_suspend_completed(true /* called_by_wait */,
a61af66fc99e Initial load
duke
parents:
diff changeset
674 delay, bits);
a61af66fc99e Initial load
duke
parents:
diff changeset
675
a61af66fc99e Initial load
duke
parents:
diff changeset
676 // It is possible for the external suspend request to be cancelled
a61af66fc99e Initial load
duke
parents:
diff changeset
677 // (by a resume) before the actual suspend operation is completed.
a61af66fc99e Initial load
duke
parents:
diff changeset
678 // Refresh our local copy to see if we still need to wait.
a61af66fc99e Initial load
duke
parents:
diff changeset
679 pending = is_external_suspend();
a61af66fc99e Initial load
duke
parents:
diff changeset
680 }
a61af66fc99e Initial load
duke
parents:
diff changeset
681
a61af66fc99e Initial load
duke
parents:
diff changeset
682 if (!pending) {
a61af66fc99e Initial load
duke
parents:
diff changeset
683 // A cancelled suspend request is the only false return from
a61af66fc99e Initial load
duke
parents:
diff changeset
684 // is_ext_suspend_completed() that keeps us from staying in the
a61af66fc99e Initial load
duke
parents:
diff changeset
685 // retry loop.
a61af66fc99e Initial load
duke
parents:
diff changeset
686 *bits |= 0x00080000;
a61af66fc99e Initial load
duke
parents:
diff changeset
687 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
688 }
a61af66fc99e Initial load
duke
parents:
diff changeset
689
a61af66fc99e Initial load
duke
parents:
diff changeset
690 if (is_suspended) {
a61af66fc99e Initial load
duke
parents:
diff changeset
691 *bits |= 0x00100000;
a61af66fc99e Initial load
duke
parents:
diff changeset
692 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
693 }
a61af66fc99e Initial load
duke
parents:
diff changeset
694 } // end retry loop
a61af66fc99e Initial load
duke
parents:
diff changeset
695
a61af66fc99e Initial load
duke
parents:
diff changeset
696 // thread did not suspend after all our retries
a61af66fc99e Initial load
duke
parents:
diff changeset
697 *bits |= 0x00200000;
a61af66fc99e Initial load
duke
parents:
diff changeset
698 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
699 }
a61af66fc99e Initial load
duke
parents:
diff changeset
700
a61af66fc99e Initial load
duke
parents:
diff changeset
701 #ifndef PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
702 void JavaThread::record_jump(address target, address instr, const char* file, int line) {
a61af66fc99e Initial load
duke
parents:
diff changeset
703
a61af66fc99e Initial load
duke
parents:
diff changeset
704 // This should not need to be atomic as the only way for simultaneous
a61af66fc99e Initial load
duke
parents:
diff changeset
705 // updates is via interrupts. Even then this should be rare or non-existant
a61af66fc99e Initial load
duke
parents:
diff changeset
706 // and we don't care that much anyway.
a61af66fc99e Initial load
duke
parents:
diff changeset
707
a61af66fc99e Initial load
duke
parents:
diff changeset
708 int index = _jmp_ring_index;
a61af66fc99e Initial load
duke
parents:
diff changeset
709 _jmp_ring_index = (index + 1 ) & (jump_ring_buffer_size - 1);
a61af66fc99e Initial load
duke
parents:
diff changeset
710 _jmp_ring[index]._target = (intptr_t) target;
a61af66fc99e Initial load
duke
parents:
diff changeset
711 _jmp_ring[index]._instruction = (intptr_t) instr;
a61af66fc99e Initial load
duke
parents:
diff changeset
712 _jmp_ring[index]._file = file;
a61af66fc99e Initial load
duke
parents:
diff changeset
713 _jmp_ring[index]._line = line;
a61af66fc99e Initial load
duke
parents:
diff changeset
714 }
a61af66fc99e Initial load
duke
parents:
diff changeset
715 #endif /* PRODUCT */
a61af66fc99e Initial load
duke
parents:
diff changeset
716
a61af66fc99e Initial load
duke
parents:
diff changeset
717 // Called by flat profiler
a61af66fc99e Initial load
duke
parents:
diff changeset
718 // Callers have already called wait_for_ext_suspend_completion
a61af66fc99e Initial load
duke
parents:
diff changeset
719 // The assertion for that is currently too complex to put here:
a61af66fc99e Initial load
duke
parents:
diff changeset
720 bool JavaThread::profile_last_Java_frame(frame* _fr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
721 bool gotframe = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
722 // self suspension saves needed state.
a61af66fc99e Initial load
duke
parents:
diff changeset
723 if (has_last_Java_frame() && _anchor.walkable()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
724 *_fr = pd_last_frame();
a61af66fc99e Initial load
duke
parents:
diff changeset
725 gotframe = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
726 }
a61af66fc99e Initial load
duke
parents:
diff changeset
727 return gotframe;
a61af66fc99e Initial load
duke
parents:
diff changeset
728 }
a61af66fc99e Initial load
duke
parents:
diff changeset
729
a61af66fc99e Initial load
duke
parents:
diff changeset
730 void Thread::interrupt(Thread* thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
731 trace("interrupt", thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
732 debug_only(check_for_dangling_thread_pointer(thread);)
a61af66fc99e Initial load
duke
parents:
diff changeset
733 os::interrupt(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
734 }
a61af66fc99e Initial load
duke
parents:
diff changeset
735
a61af66fc99e Initial load
duke
parents:
diff changeset
736 bool Thread::is_interrupted(Thread* thread, bool clear_interrupted) {
a61af66fc99e Initial load
duke
parents:
diff changeset
737 trace("is_interrupted", thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
738 debug_only(check_for_dangling_thread_pointer(thread);)
a61af66fc99e Initial load
duke
parents:
diff changeset
739 // Note: If clear_interrupted==false, this simply fetches and
a61af66fc99e Initial load
duke
parents:
diff changeset
740 // returns the value of the field osthread()->interrupted().
a61af66fc99e Initial load
duke
parents:
diff changeset
741 return os::is_interrupted(thread, clear_interrupted);
a61af66fc99e Initial load
duke
parents:
diff changeset
742 }
a61af66fc99e Initial load
duke
parents:
diff changeset
743
a61af66fc99e Initial load
duke
parents:
diff changeset
744
a61af66fc99e Initial load
duke
parents:
diff changeset
745 // GC Support
a61af66fc99e Initial load
duke
parents:
diff changeset
746 bool Thread::claim_oops_do_par_case(int strong_roots_parity) {
a61af66fc99e Initial load
duke
parents:
diff changeset
747 jint thread_parity = _oops_do_parity;
a61af66fc99e Initial load
duke
parents:
diff changeset
748 if (thread_parity != strong_roots_parity) {
a61af66fc99e Initial load
duke
parents:
diff changeset
749 jint res = Atomic::cmpxchg(strong_roots_parity, &_oops_do_parity, thread_parity);
a61af66fc99e Initial load
duke
parents:
diff changeset
750 if (res == thread_parity) return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
751 else {
a61af66fc99e Initial load
duke
parents:
diff changeset
752 guarantee(res == strong_roots_parity, "Or else what?");
a61af66fc99e Initial load
duke
parents:
diff changeset
753 assert(SharedHeap::heap()->n_par_threads() > 0,
a61af66fc99e Initial load
duke
parents:
diff changeset
754 "Should only fail when parallel.");
a61af66fc99e Initial load
duke
parents:
diff changeset
755 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
756 }
a61af66fc99e Initial load
duke
parents:
diff changeset
757 }
a61af66fc99e Initial load
duke
parents:
diff changeset
758 assert(SharedHeap::heap()->n_par_threads() > 0,
a61af66fc99e Initial load
duke
parents:
diff changeset
759 "Should only fail when parallel.");
a61af66fc99e Initial load
duke
parents:
diff changeset
760 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
761 }
a61af66fc99e Initial load
duke
parents:
diff changeset
762
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
763 void Thread::oops_do(OopClosure* f, CodeBlobClosure* cf) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
764 active_handles()->oops_do(f);
a61af66fc99e Initial load
duke
parents:
diff changeset
765 // Do oop for ThreadShadow
a61af66fc99e Initial load
duke
parents:
diff changeset
766 f->do_oop((oop*)&_pending_exception);
a61af66fc99e Initial load
duke
parents:
diff changeset
767 handle_area()->oops_do(f);
a61af66fc99e Initial load
duke
parents:
diff changeset
768 }
a61af66fc99e Initial load
duke
parents:
diff changeset
769
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
770 void Thread::nmethods_do(CodeBlobClosure* cf) {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
771 // no nmethods in a generic thread...
0
a61af66fc99e Initial load
duke
parents:
diff changeset
772 }
a61af66fc99e Initial load
duke
parents:
diff changeset
773
a61af66fc99e Initial load
duke
parents:
diff changeset
774 void Thread::print_on(outputStream* st) const {
a61af66fc99e Initial load
duke
parents:
diff changeset
775 // get_priority assumes osthread initialized
a61af66fc99e Initial load
duke
parents:
diff changeset
776 if (osthread() != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
777 st->print("prio=%d tid=" INTPTR_FORMAT " ", get_priority(this), this);
a61af66fc99e Initial load
duke
parents:
diff changeset
778 osthread()->print_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
779 }
a61af66fc99e Initial load
duke
parents:
diff changeset
780 debug_only(if (WizardMode) print_owned_locks_on(st);)
a61af66fc99e Initial load
duke
parents:
diff changeset
781 }
a61af66fc99e Initial load
duke
parents:
diff changeset
782
a61af66fc99e Initial load
duke
parents:
diff changeset
783 // Thread::print_on_error() is called by fatal error handler. Don't use
a61af66fc99e Initial load
duke
parents:
diff changeset
784 // any lock or allocate memory.
a61af66fc99e Initial load
duke
parents:
diff changeset
785 void Thread::print_on_error(outputStream* st, char* buf, int buflen) const {
a61af66fc99e Initial load
duke
parents:
diff changeset
786 if (is_VM_thread()) st->print("VMThread");
a61af66fc99e Initial load
duke
parents:
diff changeset
787 else if (is_Compiler_thread()) st->print("CompilerThread");
a61af66fc99e Initial load
duke
parents:
diff changeset
788 else if (is_Java_thread()) st->print("JavaThread");
a61af66fc99e Initial load
duke
parents:
diff changeset
789 else if (is_GC_task_thread()) st->print("GCTaskThread");
a61af66fc99e Initial load
duke
parents:
diff changeset
790 else if (is_Watcher_thread()) st->print("WatcherThread");
a61af66fc99e Initial load
duke
parents:
diff changeset
791 else if (is_ConcurrentGC_thread()) st->print("ConcurrentGCThread");
a61af66fc99e Initial load
duke
parents:
diff changeset
792 else st->print("Thread");
a61af66fc99e Initial load
duke
parents:
diff changeset
793
a61af66fc99e Initial load
duke
parents:
diff changeset
794 st->print(" [stack: " PTR_FORMAT "," PTR_FORMAT "]",
a61af66fc99e Initial load
duke
parents:
diff changeset
795 _stack_base - _stack_size, _stack_base);
a61af66fc99e Initial load
duke
parents:
diff changeset
796
a61af66fc99e Initial load
duke
parents:
diff changeset
797 if (osthread()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
798 st->print(" [id=%d]", osthread()->thread_id());
a61af66fc99e Initial load
duke
parents:
diff changeset
799 }
a61af66fc99e Initial load
duke
parents:
diff changeset
800 }
a61af66fc99e Initial load
duke
parents:
diff changeset
801
a61af66fc99e Initial load
duke
parents:
diff changeset
802 #ifdef ASSERT
a61af66fc99e Initial load
duke
parents:
diff changeset
803 void Thread::print_owned_locks_on(outputStream* st) const {
a61af66fc99e Initial load
duke
parents:
diff changeset
804 Monitor *cur = _owned_locks;
a61af66fc99e Initial load
duke
parents:
diff changeset
805 if (cur == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
806 st->print(" (no locks) ");
a61af66fc99e Initial load
duke
parents:
diff changeset
807 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
808 st->print_cr(" Locks owned:");
a61af66fc99e Initial load
duke
parents:
diff changeset
809 while(cur) {
a61af66fc99e Initial load
duke
parents:
diff changeset
810 cur->print_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
811 cur = cur->next();
a61af66fc99e Initial load
duke
parents:
diff changeset
812 }
a61af66fc99e Initial load
duke
parents:
diff changeset
813 }
a61af66fc99e Initial load
duke
parents:
diff changeset
814 }
a61af66fc99e Initial load
duke
parents:
diff changeset
815
a61af66fc99e Initial load
duke
parents:
diff changeset
816 static int ref_use_count = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
817
a61af66fc99e Initial load
duke
parents:
diff changeset
818 bool Thread::owns_locks_but_compiled_lock() const {
a61af66fc99e Initial load
duke
parents:
diff changeset
819 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
820 if (cur != Compile_lock) return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
821 }
a61af66fc99e Initial load
duke
parents:
diff changeset
822 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
823 }
a61af66fc99e Initial load
duke
parents:
diff changeset
824
a61af66fc99e Initial load
duke
parents:
diff changeset
825
a61af66fc99e Initial load
duke
parents:
diff changeset
826 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
827
a61af66fc99e Initial load
duke
parents:
diff changeset
828 #ifndef PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
829
a61af66fc99e Initial load
duke
parents:
diff changeset
830 // The flag: potential_vm_operation notifies if this particular safepoint state could potential
a61af66fc99e Initial load
duke
parents:
diff changeset
831 // invoke the vm-thread (i.e., and oop allocation). In that case, we also have to make sure that
a61af66fc99e Initial load
duke
parents:
diff changeset
832 // no threads which allow_vm_block's are held
a61af66fc99e Initial load
duke
parents:
diff changeset
833 void Thread::check_for_valid_safepoint_state(bool potential_vm_operation) {
a61af66fc99e Initial load
duke
parents:
diff changeset
834 // Check if current thread is allowed to block at a safepoint
a61af66fc99e Initial load
duke
parents:
diff changeset
835 if (!(_allow_safepoint_count == 0))
a61af66fc99e Initial load
duke
parents:
diff changeset
836 fatal("Possible safepoint reached by thread that does not allow it");
a61af66fc99e Initial load
duke
parents:
diff changeset
837 if (is_Java_thread() && ((JavaThread*)this)->thread_state() != _thread_in_vm) {
a61af66fc99e Initial load
duke
parents:
diff changeset
838 fatal("LEAF method calling lock?");
a61af66fc99e Initial load
duke
parents:
diff changeset
839 }
a61af66fc99e Initial load
duke
parents:
diff changeset
840
a61af66fc99e Initial load
duke
parents:
diff changeset
841 #ifdef ASSERT
a61af66fc99e Initial load
duke
parents:
diff changeset
842 if (potential_vm_operation && is_Java_thread()
a61af66fc99e Initial load
duke
parents:
diff changeset
843 && !Universe::is_bootstrapping()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
844 // Make sure we do not hold any locks that the VM thread also uses.
a61af66fc99e Initial load
duke
parents:
diff changeset
845 // This could potentially lead to deadlocks
a61af66fc99e Initial load
duke
parents:
diff changeset
846 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
847 // Threads_lock is special, since the safepoint synchronization will not start before this is
a61af66fc99e Initial load
duke
parents:
diff changeset
848 // acquired. Hence, a JavaThread cannot be holding it at a safepoint. So is VMOperationRequest_lock,
a61af66fc99e Initial load
duke
parents:
diff changeset
849 // since it is used to transfer control between JavaThreads and the VMThread
a61af66fc99e Initial load
duke
parents:
diff changeset
850 // Do not *exclude* any locks unless you are absolutly sure it is correct. Ask someone else first!
a61af66fc99e Initial load
duke
parents:
diff changeset
851 if ( (cur->allow_vm_block() &&
a61af66fc99e Initial load
duke
parents:
diff changeset
852 cur != Threads_lock &&
a61af66fc99e Initial load
duke
parents:
diff changeset
853 cur != Compile_lock && // Temporary: should not be necessary when we get spearate compilation
a61af66fc99e Initial load
duke
parents:
diff changeset
854 cur != VMOperationRequest_lock &&
a61af66fc99e Initial load
duke
parents:
diff changeset
855 cur != VMOperationQueue_lock) ||
a61af66fc99e Initial load
duke
parents:
diff changeset
856 cur->rank() == Mutex::special) {
a61af66fc99e Initial load
duke
parents:
diff changeset
857 warning("Thread holding lock at safepoint that vm can block on: %s", cur->name());
a61af66fc99e Initial load
duke
parents:
diff changeset
858 }
a61af66fc99e Initial load
duke
parents:
diff changeset
859 }
a61af66fc99e Initial load
duke
parents:
diff changeset
860 }
a61af66fc99e Initial load
duke
parents:
diff changeset
861
a61af66fc99e Initial load
duke
parents:
diff changeset
862 if (GCALotAtAllSafepoints) {
a61af66fc99e Initial load
duke
parents:
diff changeset
863 // We could enter a safepoint here and thus have a gc
a61af66fc99e Initial load
duke
parents:
diff changeset
864 InterfaceSupport::check_gc_alot();
a61af66fc99e Initial load
duke
parents:
diff changeset
865 }
a61af66fc99e Initial load
duke
parents:
diff changeset
866 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
867 }
a61af66fc99e Initial load
duke
parents:
diff changeset
868 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
869
a61af66fc99e Initial load
duke
parents:
diff changeset
870 bool Thread::is_in_stack(address adr) const {
a61af66fc99e Initial load
duke
parents:
diff changeset
871 assert(Thread::current() == this, "is_in_stack can only be called from current thread");
a61af66fc99e Initial load
duke
parents:
diff changeset
872 address end = os::current_stack_pointer();
a61af66fc99e Initial load
duke
parents:
diff changeset
873 if (stack_base() >= adr && adr >= end) return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
874
a61af66fc99e Initial load
duke
parents:
diff changeset
875 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
876 }
a61af66fc99e Initial load
duke
parents:
diff changeset
877
a61af66fc99e Initial load
duke
parents:
diff changeset
878
a61af66fc99e Initial load
duke
parents:
diff changeset
879 // We had to move these methods here, because vm threads get into ObjectSynchronizer::enter
a61af66fc99e Initial load
duke
parents:
diff changeset
880 // However, there is a note in JavaThread::is_lock_owned() about the VM threads not being
a61af66fc99e Initial load
duke
parents:
diff changeset
881 // used for compilation in the future. If that change is made, the need for these methods
a61af66fc99e Initial load
duke
parents:
diff changeset
882 // should be revisited, and they should be removed if possible.
a61af66fc99e Initial load
duke
parents:
diff changeset
883
a61af66fc99e Initial load
duke
parents:
diff changeset
884 bool Thread::is_lock_owned(address adr) const {
1688
2dfd013a7465 6975078: assert(allocated_on_res_area() || allocated_on_C_heap() || allocated_on_arena()
kvn
parents: 1608
diff changeset
885 return on_local_stack(adr);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
886 }
a61af66fc99e Initial load
duke
parents:
diff changeset
887
a61af66fc99e Initial load
duke
parents:
diff changeset
888 bool Thread::set_as_starting_thread() {
a61af66fc99e Initial load
duke
parents:
diff changeset
889 // NOTE: this must be called inside the main thread.
a61af66fc99e Initial load
duke
parents:
diff changeset
890 return os::create_main_thread((JavaThread*)this);
a61af66fc99e Initial load
duke
parents:
diff changeset
891 }
a61af66fc99e Initial load
duke
parents:
diff changeset
892
a61af66fc99e Initial load
duke
parents:
diff changeset
893 static void initialize_class(symbolHandle class_name, TRAPS) {
a61af66fc99e Initial load
duke
parents:
diff changeset
894 klassOop klass = SystemDictionary::resolve_or_fail(class_name, true, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
895 instanceKlass::cast(klass)->initialize(CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
896 }
a61af66fc99e Initial load
duke
parents:
diff changeset
897
a61af66fc99e Initial load
duke
parents:
diff changeset
898
a61af66fc99e Initial load
duke
parents:
diff changeset
899 // Creates the initial ThreadGroup
a61af66fc99e Initial load
duke
parents:
diff changeset
900 static Handle create_initial_thread_group(TRAPS) {
a61af66fc99e Initial load
duke
parents:
diff changeset
901 klassOop k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_ThreadGroup(), true, CHECK_NH);
a61af66fc99e Initial load
duke
parents:
diff changeset
902 instanceKlassHandle klass (THREAD, k);
a61af66fc99e Initial load
duke
parents:
diff changeset
903
a61af66fc99e Initial load
duke
parents:
diff changeset
904 Handle system_instance = klass->allocate_instance_handle(CHECK_NH);
a61af66fc99e Initial load
duke
parents:
diff changeset
905 {
a61af66fc99e Initial load
duke
parents:
diff changeset
906 JavaValue result(T_VOID);
a61af66fc99e Initial load
duke
parents:
diff changeset
907 JavaCalls::call_special(&result,
a61af66fc99e Initial load
duke
parents:
diff changeset
908 system_instance,
a61af66fc99e Initial load
duke
parents:
diff changeset
909 klass,
a61af66fc99e Initial load
duke
parents:
diff changeset
910 vmSymbolHandles::object_initializer_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
911 vmSymbolHandles::void_method_signature(),
a61af66fc99e Initial load
duke
parents:
diff changeset
912 CHECK_NH);
a61af66fc99e Initial load
duke
parents:
diff changeset
913 }
a61af66fc99e Initial load
duke
parents:
diff changeset
914 Universe::set_system_thread_group(system_instance());
a61af66fc99e Initial load
duke
parents:
diff changeset
915
a61af66fc99e Initial load
duke
parents:
diff changeset
916 Handle main_instance = klass->allocate_instance_handle(CHECK_NH);
a61af66fc99e Initial load
duke
parents:
diff changeset
917 {
a61af66fc99e Initial load
duke
parents:
diff changeset
918 JavaValue result(T_VOID);
a61af66fc99e Initial load
duke
parents:
diff changeset
919 Handle string = java_lang_String::create_from_str("main", CHECK_NH);
a61af66fc99e Initial load
duke
parents:
diff changeset
920 JavaCalls::call_special(&result,
a61af66fc99e Initial load
duke
parents:
diff changeset
921 main_instance,
a61af66fc99e Initial load
duke
parents:
diff changeset
922 klass,
a61af66fc99e Initial load
duke
parents:
diff changeset
923 vmSymbolHandles::object_initializer_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
924 vmSymbolHandles::threadgroup_string_void_signature(),
a61af66fc99e Initial load
duke
parents:
diff changeset
925 system_instance,
a61af66fc99e Initial load
duke
parents:
diff changeset
926 string,
a61af66fc99e Initial load
duke
parents:
diff changeset
927 CHECK_NH);
a61af66fc99e Initial load
duke
parents:
diff changeset
928 }
a61af66fc99e Initial load
duke
parents:
diff changeset
929 return main_instance;
a61af66fc99e Initial load
duke
parents:
diff changeset
930 }
a61af66fc99e Initial load
duke
parents:
diff changeset
931
a61af66fc99e Initial load
duke
parents:
diff changeset
932 // Creates the initial Thread
a61af66fc99e Initial load
duke
parents:
diff changeset
933 static oop create_initial_thread(Handle thread_group, JavaThread* thread, TRAPS) {
a61af66fc99e Initial load
duke
parents:
diff changeset
934 klassOop k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_Thread(), true, CHECK_NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
935 instanceKlassHandle klass (THREAD, k);
a61af66fc99e Initial load
duke
parents:
diff changeset
936 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
937
a61af66fc99e Initial load
duke
parents:
diff changeset
938 java_lang_Thread::set_thread(thread_oop(), thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
939 java_lang_Thread::set_priority(thread_oop(), NormPriority);
a61af66fc99e Initial load
duke
parents:
diff changeset
940 thread->set_threadObj(thread_oop());
a61af66fc99e Initial load
duke
parents:
diff changeset
941
a61af66fc99e Initial load
duke
parents:
diff changeset
942 Handle string = java_lang_String::create_from_str("main", CHECK_NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
943
a61af66fc99e Initial load
duke
parents:
diff changeset
944 JavaValue result(T_VOID);
a61af66fc99e Initial load
duke
parents:
diff changeset
945 JavaCalls::call_special(&result, thread_oop,
a61af66fc99e Initial load
duke
parents:
diff changeset
946 klass,
a61af66fc99e Initial load
duke
parents:
diff changeset
947 vmSymbolHandles::object_initializer_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
948 vmSymbolHandles::threadgroup_string_void_signature(),
a61af66fc99e Initial load
duke
parents:
diff changeset
949 thread_group,
a61af66fc99e Initial load
duke
parents:
diff changeset
950 string,
a61af66fc99e Initial load
duke
parents:
diff changeset
951 CHECK_NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
952 return thread_oop();
a61af66fc99e Initial load
duke
parents:
diff changeset
953 }
a61af66fc99e Initial load
duke
parents:
diff changeset
954
a61af66fc99e Initial load
duke
parents:
diff changeset
955 static void call_initializeSystemClass(TRAPS) {
a61af66fc99e Initial load
duke
parents:
diff changeset
956 klassOop k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_System(), true, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
957 instanceKlassHandle klass (THREAD, k);
a61af66fc99e Initial load
duke
parents:
diff changeset
958
a61af66fc99e Initial load
duke
parents:
diff changeset
959 JavaValue result(T_VOID);
a61af66fc99e Initial load
duke
parents:
diff changeset
960 JavaCalls::call_static(&result, klass, vmSymbolHandles::initializeSystemClass_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
961 vmSymbolHandles::void_method_signature(), CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
962 }
a61af66fc99e Initial load
duke
parents:
diff changeset
963
1115
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
964 #ifdef KERNEL
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
965 static void set_jkernel_boot_classloader_hook(TRAPS) {
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
966 klassOop k = SystemDictionary::sun_jkernel_DownloadManager_klass();
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
967 instanceKlassHandle klass (THREAD, k);
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
968
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
969 if (k == NULL) {
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
970 // sun.jkernel.DownloadManager may not present in the JDK; just return
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
971 return;
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
972 }
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
973
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
974 JavaValue result(T_VOID);
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
975 JavaCalls::call_static(&result, klass, vmSymbolHandles::setBootClassLoaderHook_name(),
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
976 vmSymbolHandles::void_method_signature(), CHECK);
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
977 }
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
978 #endif // KERNEL
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
979
0
a61af66fc99e Initial load
duke
parents:
diff changeset
980 static void reset_vm_info_property(TRAPS) {
a61af66fc99e Initial load
duke
parents:
diff changeset
981 // the vm info string
a61af66fc99e Initial load
duke
parents:
diff changeset
982 ResourceMark rm(THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
983 const char *vm_info = VM_Version::vm_info_string();
a61af66fc99e Initial load
duke
parents:
diff changeset
984
a61af66fc99e Initial load
duke
parents:
diff changeset
985 // java.lang.System class
a61af66fc99e Initial load
duke
parents:
diff changeset
986 klassOop k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_System(), true, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
987 instanceKlassHandle klass (THREAD, k);
a61af66fc99e Initial load
duke
parents:
diff changeset
988
a61af66fc99e Initial load
duke
parents:
diff changeset
989 // setProperty arguments
a61af66fc99e Initial load
duke
parents:
diff changeset
990 Handle key_str = java_lang_String::create_from_str("java.vm.info", CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
991 Handle value_str = java_lang_String::create_from_str(vm_info, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
992
a61af66fc99e Initial load
duke
parents:
diff changeset
993 // return value
a61af66fc99e Initial load
duke
parents:
diff changeset
994 JavaValue r(T_OBJECT);
a61af66fc99e Initial load
duke
parents:
diff changeset
995
a61af66fc99e Initial load
duke
parents:
diff changeset
996 // public static String setProperty(String key, String value);
a61af66fc99e Initial load
duke
parents:
diff changeset
997 JavaCalls::call_static(&r,
a61af66fc99e Initial load
duke
parents:
diff changeset
998 klass,
a61af66fc99e Initial load
duke
parents:
diff changeset
999 vmSymbolHandles::setProperty_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1000 vmSymbolHandles::string_string_string_signature(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1001 key_str,
a61af66fc99e Initial load
duke
parents:
diff changeset
1002 value_str,
a61af66fc99e Initial load
duke
parents:
diff changeset
1003 CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
1004 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1005
a61af66fc99e Initial load
duke
parents:
diff changeset
1006
a61af66fc99e Initial load
duke
parents:
diff changeset
1007 void JavaThread::allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1008 assert(thread_group.not_null(), "thread group should be specified");
a61af66fc99e Initial load
duke
parents:
diff changeset
1009 assert(threadObj() == NULL, "should only create Java thread object once");
a61af66fc99e Initial load
duke
parents:
diff changeset
1010
a61af66fc99e Initial load
duke
parents:
diff changeset
1011 klassOop k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_Thread(), true, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
1012 instanceKlassHandle klass (THREAD, k);
a61af66fc99e Initial load
duke
parents:
diff changeset
1013 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
1014
a61af66fc99e Initial load
duke
parents:
diff changeset
1015 java_lang_Thread::set_thread(thread_oop(), this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1016 java_lang_Thread::set_priority(thread_oop(), NormPriority);
a61af66fc99e Initial load
duke
parents:
diff changeset
1017 set_threadObj(thread_oop());
a61af66fc99e Initial load
duke
parents:
diff changeset
1018
a61af66fc99e Initial load
duke
parents:
diff changeset
1019 JavaValue result(T_VOID);
a61af66fc99e Initial load
duke
parents:
diff changeset
1020 if (thread_name != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1021 Handle name = java_lang_String::create_from_str(thread_name, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
1022 // Thread gets assigned specified name and null target
a61af66fc99e Initial load
duke
parents:
diff changeset
1023 JavaCalls::call_special(&result,
a61af66fc99e Initial load
duke
parents:
diff changeset
1024 thread_oop,
a61af66fc99e Initial load
duke
parents:
diff changeset
1025 klass,
a61af66fc99e Initial load
duke
parents:
diff changeset
1026 vmSymbolHandles::object_initializer_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1027 vmSymbolHandles::threadgroup_string_void_signature(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1028 thread_group, // Argument 1
a61af66fc99e Initial load
duke
parents:
diff changeset
1029 name, // Argument 2
a61af66fc99e Initial load
duke
parents:
diff changeset
1030 THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
1031 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1032 // Thread gets assigned name "Thread-nnn" and null target
a61af66fc99e Initial load
duke
parents:
diff changeset
1033 // (java.lang.Thread doesn't have a constructor taking only a ThreadGroup argument)
a61af66fc99e Initial load
duke
parents:
diff changeset
1034 JavaCalls::call_special(&result,
a61af66fc99e Initial load
duke
parents:
diff changeset
1035 thread_oop,
a61af66fc99e Initial load
duke
parents:
diff changeset
1036 klass,
a61af66fc99e Initial load
duke
parents:
diff changeset
1037 vmSymbolHandles::object_initializer_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1038 vmSymbolHandles::threadgroup_runnable_void_signature(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1039 thread_group, // Argument 1
a61af66fc99e Initial load
duke
parents:
diff changeset
1040 Handle(), // Argument 2
a61af66fc99e Initial load
duke
parents:
diff changeset
1041 THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
1042 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1043
a61af66fc99e Initial load
duke
parents:
diff changeset
1044
a61af66fc99e Initial load
duke
parents:
diff changeset
1045 if (daemon) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1046 java_lang_Thread::set_daemon(thread_oop());
a61af66fc99e Initial load
duke
parents:
diff changeset
1047 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1048
a61af66fc99e Initial load
duke
parents:
diff changeset
1049 if (HAS_PENDING_EXCEPTION) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1050 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
1051 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1052
1142
4ce7240d622c 6914300: ciEnv should export all well known classes
never
parents: 1135
diff changeset
1053 KlassHandle group(this, SystemDictionary::ThreadGroup_klass());
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1054 Handle threadObj(this, this->threadObj());
a61af66fc99e Initial load
duke
parents:
diff changeset
1055
a61af66fc99e Initial load
duke
parents:
diff changeset
1056 JavaCalls::call_special(&result,
a61af66fc99e Initial load
duke
parents:
diff changeset
1057 thread_group,
a61af66fc99e Initial load
duke
parents:
diff changeset
1058 group,
a61af66fc99e Initial load
duke
parents:
diff changeset
1059 vmSymbolHandles::add_method_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1060 vmSymbolHandles::thread_void_signature(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1061 threadObj, // Arg 1
a61af66fc99e Initial load
duke
parents:
diff changeset
1062 THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
1063
a61af66fc99e Initial load
duke
parents:
diff changeset
1064
a61af66fc99e Initial load
duke
parents:
diff changeset
1065 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1066
a61af66fc99e Initial load
duke
parents:
diff changeset
1067 // NamedThread -- non-JavaThread subclasses with multiple
a61af66fc99e Initial load
duke
parents:
diff changeset
1068 // uniquely named instances should derive from this.
a61af66fc99e Initial load
duke
parents:
diff changeset
1069 NamedThread::NamedThread() : Thread() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1070 _name = NULL;
1119
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
1071 _processed_thread = NULL;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1072 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1073
a61af66fc99e Initial load
duke
parents:
diff changeset
1074 NamedThread::~NamedThread() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1075 if (_name != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1076 FREE_C_HEAP_ARRAY(char, _name);
a61af66fc99e Initial load
duke
parents:
diff changeset
1077 _name = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1078 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1079 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1080
a61af66fc99e Initial load
duke
parents:
diff changeset
1081 void NamedThread::set_name(const char* format, ...) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1082 guarantee(_name == NULL, "Only get to set name once.");
a61af66fc99e Initial load
duke
parents:
diff changeset
1083 _name = NEW_C_HEAP_ARRAY(char, max_name_len);
a61af66fc99e Initial load
duke
parents:
diff changeset
1084 guarantee(_name != NULL, "alloc failure");
a61af66fc99e Initial load
duke
parents:
diff changeset
1085 va_list ap;
a61af66fc99e Initial load
duke
parents:
diff changeset
1086 va_start(ap, format);
a61af66fc99e Initial load
duke
parents:
diff changeset
1087 jio_vsnprintf(_name, max_name_len, format, ap);
a61af66fc99e Initial load
duke
parents:
diff changeset
1088 va_end(ap);
a61af66fc99e Initial load
duke
parents:
diff changeset
1089 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1090
a61af66fc99e Initial load
duke
parents:
diff changeset
1091 // ======= WatcherThread ========
a61af66fc99e Initial load
duke
parents:
diff changeset
1092
a61af66fc99e Initial load
duke
parents:
diff changeset
1093 // The watcher thread exists to simulate timer interrupts. It should
a61af66fc99e Initial load
duke
parents:
diff changeset
1094 // be replaced by an abstraction over whatever native support for
a61af66fc99e Initial load
duke
parents:
diff changeset
1095 // timer interrupts exists on the platform.
a61af66fc99e Initial load
duke
parents:
diff changeset
1096
a61af66fc99e Initial load
duke
parents:
diff changeset
1097 WatcherThread* WatcherThread::_watcher_thread = NULL;
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1098 volatile bool WatcherThread::_should_terminate = false;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1099
a61af66fc99e Initial load
duke
parents:
diff changeset
1100 WatcherThread::WatcherThread() : Thread() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1101 assert(watcher_thread() == NULL, "we can only allocate one WatcherThread");
a61af66fc99e Initial load
duke
parents:
diff changeset
1102 if (os::create_thread(this, os::watcher_thread)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1103 _watcher_thread = this;
a61af66fc99e Initial load
duke
parents:
diff changeset
1104
a61af66fc99e Initial load
duke
parents:
diff changeset
1105 // Set the watcher thread to the highest OS priority which should not be
a61af66fc99e Initial load
duke
parents:
diff changeset
1106 // used, unless a Java thread with priority java.lang.Thread.MAX_PRIORITY
a61af66fc99e Initial load
duke
parents:
diff changeset
1107 // is created. The only normal thread using this priority is the reference
a61af66fc99e Initial load
duke
parents:
diff changeset
1108 // handler thread, which runs for very short intervals only.
a61af66fc99e Initial load
duke
parents:
diff changeset
1109 // If the VMThread's priority is not lower than the WatcherThread profiling
a61af66fc99e Initial load
duke
parents:
diff changeset
1110 // will be inaccurate.
a61af66fc99e Initial load
duke
parents:
diff changeset
1111 os::set_priority(this, MaxPriority);
a61af66fc99e Initial load
duke
parents:
diff changeset
1112 if (!DisableStartThread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1113 os::start_thread(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1114 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1115 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1116 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1117
a61af66fc99e Initial load
duke
parents:
diff changeset
1118 void WatcherThread::run() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1119 assert(this == watcher_thread(), "just checking");
a61af66fc99e Initial load
duke
parents:
diff changeset
1120
a61af66fc99e Initial load
duke
parents:
diff changeset
1121 this->record_stack_base_and_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
1122 this->initialize_thread_local_storage();
a61af66fc99e Initial load
duke
parents:
diff changeset
1123 this->set_active_handles(JNIHandleBlock::allocate_block());
a61af66fc99e Initial load
duke
parents:
diff changeset
1124 while(!_should_terminate) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1125 assert(watcher_thread() == Thread::current(), "thread consistency check");
a61af66fc99e Initial load
duke
parents:
diff changeset
1126 assert(watcher_thread() == this, "thread consistency check");
a61af66fc99e Initial load
duke
parents:
diff changeset
1127
a61af66fc99e Initial load
duke
parents:
diff changeset
1128 // Calculate how long it'll be until the next PeriodicTask work
a61af66fc99e Initial load
duke
parents:
diff changeset
1129 // should be done, and sleep that amount of time.
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1130 size_t time_to_wait = PeriodicTask::time_to_wait();
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1131
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1132 // we expect this to timeout - we only ever get unparked when
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1133 // we should terminate
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1134 {
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1135 OSThreadWaitState osts(this->osthread(), false /* not Object.wait() */);
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1136
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1137 jlong prev_time = os::javaTimeNanos();
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1138 for (;;) {
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1139 int res= _SleepEvent->park(time_to_wait);
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1140 if (res == OS_TIMEOUT || _should_terminate)
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1141 break;
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1142 // spurious wakeup of some kind
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1143 jlong now = os::javaTimeNanos();
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1144 time_to_wait -= (now - prev_time) / 1000000;
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1145 if (time_to_wait <= 0)
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1146 break;
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1147 prev_time = now;
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1148 }
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1149 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1150
a61af66fc99e Initial load
duke
parents:
diff changeset
1151 if (is_error_reported()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1152 // A fatal error has happened, the error handler(VMError::report_and_die)
a61af66fc99e Initial load
duke
parents:
diff changeset
1153 // should abort JVM after creating an error log file. However in some
a61af66fc99e Initial load
duke
parents:
diff changeset
1154 // rare cases, the error handler itself might deadlock. Here we try to
a61af66fc99e Initial load
duke
parents:
diff changeset
1155 // kill JVM if the fatal error handler fails to abort in 2 minutes.
a61af66fc99e Initial load
duke
parents:
diff changeset
1156 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1157 // This code is in WatcherThread because WatcherThread wakes up
a61af66fc99e Initial load
duke
parents:
diff changeset
1158 // periodically so the fatal error handler doesn't need to do anything;
a61af66fc99e Initial load
duke
parents:
diff changeset
1159 // also because the WatcherThread is less likely to crash than other
a61af66fc99e Initial load
duke
parents:
diff changeset
1160 // threads.
a61af66fc99e Initial load
duke
parents:
diff changeset
1161
a61af66fc99e Initial load
duke
parents:
diff changeset
1162 for (;;) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1163 if (!ShowMessageBoxOnError
a61af66fc99e Initial load
duke
parents:
diff changeset
1164 && (OnError == NULL || OnError[0] == '\0')
a61af66fc99e Initial load
duke
parents:
diff changeset
1165 && Arguments::abort_hook() == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1166 os::sleep(this, 2 * 60 * 1000, false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1167 fdStream err(defaultStream::output_fd());
a61af66fc99e Initial load
duke
parents:
diff changeset
1168 err.print_raw_cr("# [ timer expired, abort... ]");
a61af66fc99e Initial load
duke
parents:
diff changeset
1169 // skip atexit/vm_exit/vm_abort hooks
a61af66fc99e Initial load
duke
parents:
diff changeset
1170 os::die();
a61af66fc99e Initial load
duke
parents:
diff changeset
1171 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1172
a61af66fc99e Initial load
duke
parents:
diff changeset
1173 // Wake up 5 seconds later, the fatal handler may reset OnError or
a61af66fc99e Initial load
duke
parents:
diff changeset
1174 // ShowMessageBoxOnError when it is ready to abort.
a61af66fc99e Initial load
duke
parents:
diff changeset
1175 os::sleep(this, 5 * 1000, false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1176 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1177 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1178
a61af66fc99e Initial load
duke
parents:
diff changeset
1179 PeriodicTask::real_time_tick(time_to_wait);
a61af66fc99e Initial load
duke
parents:
diff changeset
1180
a61af66fc99e Initial load
duke
parents:
diff changeset
1181 // If we have no more tasks left due to dynamic disenrollment,
a61af66fc99e Initial load
duke
parents:
diff changeset
1182 // shut down the thread since we don't currently support dynamic enrollment
a61af66fc99e Initial load
duke
parents:
diff changeset
1183 if (PeriodicTask::num_tasks() == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1184 _should_terminate = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1185 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1186 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1187
a61af66fc99e Initial load
duke
parents:
diff changeset
1188 // Signal that it is terminated
a61af66fc99e Initial load
duke
parents:
diff changeset
1189 {
a61af66fc99e Initial load
duke
parents:
diff changeset
1190 MutexLockerEx mu(Terminator_lock, Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
1191 _watcher_thread = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1192 Terminator_lock->notify();
a61af66fc99e Initial load
duke
parents:
diff changeset
1193 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1194
a61af66fc99e Initial load
duke
parents:
diff changeset
1195 // Thread destructor usually does this..
a61af66fc99e Initial load
duke
parents:
diff changeset
1196 ThreadLocalStorage::set_thread(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1197 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1198
a61af66fc99e Initial load
duke
parents:
diff changeset
1199 void WatcherThread::start() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1200 if (watcher_thread() == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1201 _should_terminate = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1202 // Create the single instance of WatcherThread
a61af66fc99e Initial load
duke
parents:
diff changeset
1203 new WatcherThread();
a61af66fc99e Initial load
duke
parents:
diff changeset
1204 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1205 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1206
a61af66fc99e Initial load
duke
parents:
diff changeset
1207 void WatcherThread::stop() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1208 // it is ok to take late safepoints here, if needed
a61af66fc99e Initial load
duke
parents:
diff changeset
1209 MutexLocker mu(Terminator_lock);
a61af66fc99e Initial load
duke
parents:
diff changeset
1210 _should_terminate = true;
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1211 OrderAccess::fence(); // ensure WatcherThread sees update in main loop
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1212
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1213 Thread* watcher = watcher_thread();
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1214 if (watcher != NULL)
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1215 watcher->_SleepEvent->unpark();
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1216
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1217 while(watcher_thread() != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1218 // This wait should make safepoint checks, wait without a timeout,
a61af66fc99e Initial load
duke
parents:
diff changeset
1219 // and wait as a suspend-equivalent condition.
a61af66fc99e Initial load
duke
parents:
diff changeset
1220 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1221 // Note: If the FlatProfiler is running, then this thread is waiting
a61af66fc99e Initial load
duke
parents:
diff changeset
1222 // for the WatcherThread to terminate and the WatcherThread, via the
a61af66fc99e Initial load
duke
parents:
diff changeset
1223 // FlatProfiler task, is waiting for the external suspend request on
a61af66fc99e Initial load
duke
parents:
diff changeset
1224 // this thread to complete. wait_for_ext_suspend_completion() will
a61af66fc99e Initial load
duke
parents:
diff changeset
1225 // eventually timeout, but that takes time. Making this wait a
a61af66fc99e Initial load
duke
parents:
diff changeset
1226 // suspend-equivalent condition solves that timeout problem.
a61af66fc99e Initial load
duke
parents:
diff changeset
1227 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1228 Terminator_lock->wait(!Mutex::_no_safepoint_check_flag, 0,
a61af66fc99e Initial load
duke
parents:
diff changeset
1229 Mutex::_as_suspend_equivalent_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
1230 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1231 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1232
a61af66fc99e Initial load
duke
parents:
diff changeset
1233 void WatcherThread::print_on(outputStream* st) const {
a61af66fc99e Initial load
duke
parents:
diff changeset
1234 st->print("\"%s\" ", name());
a61af66fc99e Initial load
duke
parents:
diff changeset
1235 Thread::print_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
1236 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
1237 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1238
a61af66fc99e Initial load
duke
parents:
diff changeset
1239 // ======= JavaThread ========
a61af66fc99e Initial load
duke
parents:
diff changeset
1240
a61af66fc99e Initial load
duke
parents:
diff changeset
1241 // A JavaThread is a normal Java thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1242
a61af66fc99e Initial load
duke
parents:
diff changeset
1243 void JavaThread::initialize() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1244 // Initialize fields
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1245
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1246 // Set the claimed par_id to -1 (ie not claiming any par_ids)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1247 set_claimed_par_id(-1);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1248
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1249 set_saved_exception_pc(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1250 set_threadObj(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1251 _anchor.clear();
a61af66fc99e Initial load
duke
parents:
diff changeset
1252 set_entry_point(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1253 set_jni_functions(jni_functions());
a61af66fc99e Initial load
duke
parents:
diff changeset
1254 set_callee_target(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1255 set_vm_result(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1256 set_vm_result_2(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1257 set_vframe_array_head(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1258 set_vframe_array_last(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1259 set_deferred_locals(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1260 set_deopt_mark(NULL);
1814
fd5d4527cdf5 6986270: guarantee(*bcp != Bytecodes::_monitorenter || exec_mode != Deoptimization::Unpack_exception) fails
iveresov
parents: 1731
diff changeset
1261 set_deopt_nmethod(NULL);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1262 clear_must_deopt_id();
a61af66fc99e Initial load
duke
parents:
diff changeset
1263 set_monitor_chunks(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1264 set_next(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1265 set_thread_state(_thread_new);
a61af66fc99e Initial load
duke
parents:
diff changeset
1266 _terminated = _not_terminated;
a61af66fc99e Initial load
duke
parents:
diff changeset
1267 _privileged_stack_top = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1268 _array_for_gc = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1269 _suspend_equivalent = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1270 _in_deopt_handler = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
1271 _doing_unsafe_access = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1272 _stack_guard_state = stack_guard_unused;
a61af66fc99e Initial load
duke
parents:
diff changeset
1273 _exception_oop = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1274 _exception_pc = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
1275 _exception_handler_pc = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
1276 _exception_stack_size = 0;
1903
87d6a4d1ecbc 6990192: VM crashes in ciTypeFlow::get_block_for()
twisti
parents: 1843
diff changeset
1277 _is_method_handle_return = 0;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1278 _jvmti_thread_state= NULL;
1213
6deeaebad47a 6902182: 4/4 Starting with jdwp agent should not incur performance penalty
dcubed
parents: 1166
diff changeset
1279 _should_post_on_exceptions_flag = JNI_FALSE;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1280 _jvmti_get_loaded_classes_closure = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1281 _interp_only_mode = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
1282 _special_runtime_exit_condition = _no_async_condition;
a61af66fc99e Initial load
duke
parents:
diff changeset
1283 _pending_async_exception = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1284 _is_compiling = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1285 _thread_stat = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1286 _thread_stat = new ThreadStatistics();
a61af66fc99e Initial load
duke
parents:
diff changeset
1287 _blocked_on_compilation = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1288 _jni_active_critical = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
1289 _do_not_unlock_if_synchronized = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1290 _cached_monitor_info = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1291 _parker = Parker::Allocate(this) ;
a61af66fc99e Initial load
duke
parents:
diff changeset
1292
a61af66fc99e Initial load
duke
parents:
diff changeset
1293 #ifndef PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
1294 _jmp_ring_index = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
1295 for (int ji = 0 ; ji < jump_ring_buffer_size ; ji++ ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1296 record_jump(NULL, NULL, NULL, 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
1297 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1298 #endif /* PRODUCT */
a61af66fc99e Initial load
duke
parents:
diff changeset
1299
a61af66fc99e Initial load
duke
parents:
diff changeset
1300 set_thread_profiler(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1301 if (FlatProfiler::is_active()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1302 // This is where we would decide to either give each thread it's own profiler
a61af66fc99e Initial load
duke
parents:
diff changeset
1303 // or use one global one from FlatProfiler,
a61af66fc99e Initial load
duke
parents:
diff changeset
1304 // or up to some count of the number of profiled threads, etc.
a61af66fc99e Initial load
duke
parents:
diff changeset
1305 ThreadProfiler* pp = new ThreadProfiler();
a61af66fc99e Initial load
duke
parents:
diff changeset
1306 pp->engage();
a61af66fc99e Initial load
duke
parents:
diff changeset
1307 set_thread_profiler(pp);
a61af66fc99e Initial load
duke
parents:
diff changeset
1308 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1309
a61af66fc99e Initial load
duke
parents:
diff changeset
1310 // Setup safepoint state info for this thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1311 ThreadSafepointState::create(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1312
a61af66fc99e Initial load
duke
parents:
diff changeset
1313 debug_only(_java_call_counter = 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
1314
a61af66fc99e Initial load
duke
parents:
diff changeset
1315 // JVMTI PopFrame support
a61af66fc99e Initial load
duke
parents:
diff changeset
1316 _popframe_condition = popframe_inactive;
a61af66fc99e Initial load
duke
parents:
diff changeset
1317 _popframe_preserved_args = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1318 _popframe_preserved_args_size = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
1319
a61af66fc99e Initial load
duke
parents:
diff changeset
1320 pd_initialize();
a61af66fc99e Initial load
duke
parents:
diff changeset
1321 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1322
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1323 #ifndef SERIALGC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1324 SATBMarkQueueSet JavaThread::_satb_mark_queue_set;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1325 DirtyCardQueueSet JavaThread::_dirty_card_queue_set;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1326 #endif // !SERIALGC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1327
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1328 JavaThread::JavaThread(bool is_attaching) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1329 Thread()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1330 #ifndef SERIALGC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1331 , _satb_mark_queue(&_satb_mark_queue_set),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1332 _dirty_card_queue(&_dirty_card_queue_set)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1333 #endif // !SERIALGC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1334 {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1335 initialize();
a61af66fc99e Initial load
duke
parents:
diff changeset
1336 _is_attaching = is_attaching;
1027
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents: 997
diff changeset
1337 assert(_deferred_card_mark.is_empty(), "Default MemRegion ctor");
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1338 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1339
a61af66fc99e Initial load
duke
parents:
diff changeset
1340 bool JavaThread::reguard_stack(address cur_sp) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1341 if (_stack_guard_state != stack_guard_yellow_disabled) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1342 return true; // Stack already guarded or guard pages not needed.
a61af66fc99e Initial load
duke
parents:
diff changeset
1343 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1344
a61af66fc99e Initial load
duke
parents:
diff changeset
1345 if (register_stack_overflow()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1346 // For those architectures which have separate register and
a61af66fc99e Initial load
duke
parents:
diff changeset
1347 // memory stacks, we must check the register stack to see if
a61af66fc99e Initial load
duke
parents:
diff changeset
1348 // it has overflowed.
a61af66fc99e Initial load
duke
parents:
diff changeset
1349 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1350 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1351
a61af66fc99e Initial load
duke
parents:
diff changeset
1352 // Java code never executes within the yellow zone: the latter is only
a61af66fc99e Initial load
duke
parents:
diff changeset
1353 // there to provoke an exception during stack banging. If java code
a61af66fc99e Initial load
duke
parents:
diff changeset
1354 // is executing there, either StackShadowPages should be larger, or
a61af66fc99e Initial load
duke
parents:
diff changeset
1355 // some exception code in c1, c2 or the interpreter isn't unwinding
a61af66fc99e Initial load
duke
parents:
diff changeset
1356 // when it should.
a61af66fc99e Initial load
duke
parents:
diff changeset
1357 guarantee(cur_sp > stack_yellow_zone_base(), "not enough space to reguard - increase StackShadowPages");
a61af66fc99e Initial load
duke
parents:
diff changeset
1358
a61af66fc99e Initial load
duke
parents:
diff changeset
1359 enable_stack_yellow_zone();
a61af66fc99e Initial load
duke
parents:
diff changeset
1360 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1361 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1362
a61af66fc99e Initial load
duke
parents:
diff changeset
1363 bool JavaThread::reguard_stack(void) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1364 return reguard_stack(os::current_stack_pointer());
a61af66fc99e Initial load
duke
parents:
diff changeset
1365 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1366
a61af66fc99e Initial load
duke
parents:
diff changeset
1367
a61af66fc99e Initial load
duke
parents:
diff changeset
1368 void JavaThread::block_if_vm_exited() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1369 if (_terminated == _vm_exited) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1370 // _vm_exited is set at safepoint, and Threads_lock is never released
a61af66fc99e Initial load
duke
parents:
diff changeset
1371 // we will block here forever
a61af66fc99e Initial load
duke
parents:
diff changeset
1372 Threads_lock->lock_without_safepoint_check();
a61af66fc99e Initial load
duke
parents:
diff changeset
1373 ShouldNotReachHere();
a61af66fc99e Initial load
duke
parents:
diff changeset
1374 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1375 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1376
a61af66fc99e Initial load
duke
parents:
diff changeset
1377
a61af66fc99e Initial load
duke
parents:
diff changeset
1378 // Remove this ifdef when C1 is ported to the compiler interface.
a61af66fc99e Initial load
duke
parents:
diff changeset
1379 static void compiler_thread_entry(JavaThread* thread, TRAPS);
a61af66fc99e Initial load
duke
parents:
diff changeset
1380
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1381 JavaThread::JavaThread(ThreadFunction entry_point, size_t stack_sz) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1382 Thread()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1383 #ifndef SERIALGC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1384 , _satb_mark_queue(&_satb_mark_queue_set),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1385 _dirty_card_queue(&_dirty_card_queue_set)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1386 #endif // !SERIALGC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
1387 {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1388 if (TraceThreadEvents) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1389 tty->print_cr("creating thread %p", this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1390 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1391 initialize();
a61af66fc99e Initial load
duke
parents:
diff changeset
1392 _is_attaching = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1393 set_entry_point(entry_point);
a61af66fc99e Initial load
duke
parents:
diff changeset
1394 // Create the native thread itself.
a61af66fc99e Initial load
duke
parents:
diff changeset
1395 // %note runtime_23
a61af66fc99e Initial load
duke
parents:
diff changeset
1396 os::ThreadType thr_type = os::java_thread;
a61af66fc99e Initial load
duke
parents:
diff changeset
1397 thr_type = entry_point == &compiler_thread_entry ? os::compiler_thread :
a61af66fc99e Initial load
duke
parents:
diff changeset
1398 os::java_thread;
a61af66fc99e Initial load
duke
parents:
diff changeset
1399 os::create_thread(this, thr_type, stack_sz);
a61af66fc99e Initial load
duke
parents:
diff changeset
1400
a61af66fc99e Initial load
duke
parents:
diff changeset
1401 // The _osthread may be NULL here because we ran out of memory (too many threads active).
a61af66fc99e Initial load
duke
parents:
diff changeset
1402 // We need to throw and OutOfMemoryError - however we cannot do this here because the caller
a61af66fc99e Initial load
duke
parents:
diff changeset
1403 // may hold a lock and all locks must be unlocked before throwing the exception (throwing
a61af66fc99e Initial load
duke
parents:
diff changeset
1404 // the exception consists of creating the exception object & initializing it, initialization
a61af66fc99e Initial load
duke
parents:
diff changeset
1405 // will leave the VM via a JavaCall and then all locks must be unlocked).
a61af66fc99e Initial load
duke
parents:
diff changeset
1406 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1407 // The thread is still suspended when we reach here. Thread must be explicit started
a61af66fc99e Initial load
duke
parents:
diff changeset
1408 // by creator! Furthermore, the thread must also explicitly be added to the Threads list
a61af66fc99e Initial load
duke
parents:
diff changeset
1409 // by calling Threads:add. The reason why this is not done here, is because the thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1410 // object must be fully initialized (take a look at JVM_Start)
a61af66fc99e Initial load
duke
parents:
diff changeset
1411 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1412
a61af66fc99e Initial load
duke
parents:
diff changeset
1413 JavaThread::~JavaThread() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1414 if (TraceThreadEvents) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1415 tty->print_cr("terminate thread %p", this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1416 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1417
a61af66fc99e Initial load
duke
parents:
diff changeset
1418 // JSR166 -- return the parker to the free list
a61af66fc99e Initial load
duke
parents:
diff changeset
1419 Parker::Release(_parker);
a61af66fc99e Initial load
duke
parents:
diff changeset
1420 _parker = NULL ;
a61af66fc99e Initial load
duke
parents:
diff changeset
1421
a61af66fc99e Initial load
duke
parents:
diff changeset
1422 // Free any remaining previous UnrollBlock
a61af66fc99e Initial load
duke
parents:
diff changeset
1423 vframeArray* old_array = vframe_array_last();
a61af66fc99e Initial load
duke
parents:
diff changeset
1424
a61af66fc99e Initial load
duke
parents:
diff changeset
1425 if (old_array != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1426 Deoptimization::UnrollBlock* old_info = old_array->unroll_block();
a61af66fc99e Initial load
duke
parents:
diff changeset
1427 old_array->set_unroll_block(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1428 delete old_info;
a61af66fc99e Initial load
duke
parents:
diff changeset
1429 delete old_array;
a61af66fc99e Initial load
duke
parents:
diff changeset
1430 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1431
a61af66fc99e Initial load
duke
parents:
diff changeset
1432 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred = deferred_locals();
a61af66fc99e Initial load
duke
parents:
diff changeset
1433 if (deferred != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1434 // This can only happen if thread is destroyed before deoptimization occurs.
a61af66fc99e Initial load
duke
parents:
diff changeset
1435 assert(deferred->length() != 0, "empty array!");
a61af66fc99e Initial load
duke
parents:
diff changeset
1436 do {
a61af66fc99e Initial load
duke
parents:
diff changeset
1437 jvmtiDeferredLocalVariableSet* dlv = deferred->at(0);
a61af66fc99e Initial load
duke
parents:
diff changeset
1438 deferred->remove_at(0);
a61af66fc99e Initial load
duke
parents:
diff changeset
1439 // individual jvmtiDeferredLocalVariableSet are CHeapObj's
a61af66fc99e Initial load
duke
parents:
diff changeset
1440 delete dlv;
a61af66fc99e Initial load
duke
parents:
diff changeset
1441 } while (deferred->length() != 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
1442 delete deferred;
a61af66fc99e Initial load
duke
parents:
diff changeset
1443 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1444
a61af66fc99e Initial load
duke
parents:
diff changeset
1445 // All Java related clean up happens in exit
a61af66fc99e Initial load
duke
parents:
diff changeset
1446 ThreadSafepointState::destroy(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1447 if (_thread_profiler != NULL) delete _thread_profiler;
a61af66fc99e Initial load
duke
parents:
diff changeset
1448 if (_thread_stat != NULL) delete _thread_stat;
a61af66fc99e Initial load
duke
parents:
diff changeset
1449 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1450
a61af66fc99e Initial load
duke
parents:
diff changeset
1451
a61af66fc99e Initial load
duke
parents:
diff changeset
1452 // The first routine called by a new Java thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1453 void JavaThread::run() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1454 // initialize thread-local alloc buffer related fields
a61af66fc99e Initial load
duke
parents:
diff changeset
1455 this->initialize_tlab();
a61af66fc99e Initial load
duke
parents:
diff changeset
1456
a61af66fc99e Initial load
duke
parents:
diff changeset
1457 // used to test validitity of stack trace backs
a61af66fc99e Initial load
duke
parents:
diff changeset
1458 this->record_base_of_stack_pointer();
a61af66fc99e Initial load
duke
parents:
diff changeset
1459
a61af66fc99e Initial load
duke
parents:
diff changeset
1460 // Record real stack base and size.
a61af66fc99e Initial load
duke
parents:
diff changeset
1461 this->record_stack_base_and_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
1462
a61af66fc99e Initial load
duke
parents:
diff changeset
1463 // Initialize thread local storage; set before calling MutexLocker
a61af66fc99e Initial load
duke
parents:
diff changeset
1464 this->initialize_thread_local_storage();
a61af66fc99e Initial load
duke
parents:
diff changeset
1465
a61af66fc99e Initial load
duke
parents:
diff changeset
1466 this->create_stack_guard_pages();
a61af66fc99e Initial load
duke
parents:
diff changeset
1467
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1468 this->cache_global_variables();
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
1469
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1470 // Thread is now sufficient initialized to be handled by the safepoint code as being
a61af66fc99e Initial load
duke
parents:
diff changeset
1471 // in the VM. Change thread state from _thread_new to _thread_in_vm
a61af66fc99e Initial load
duke
parents:
diff changeset
1472 ThreadStateTransition::transition_and_fence(this, _thread_new, _thread_in_vm);
a61af66fc99e Initial load
duke
parents:
diff changeset
1473
a61af66fc99e Initial load
duke
parents:
diff changeset
1474 assert(JavaThread::current() == this, "sanity check");
a61af66fc99e Initial load
duke
parents:
diff changeset
1475 assert(!Thread::current()->owns_locks(), "sanity check");
a61af66fc99e Initial load
duke
parents:
diff changeset
1476
a61af66fc99e Initial load
duke
parents:
diff changeset
1477 DTRACE_THREAD_PROBE(start, this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1478
a61af66fc99e Initial load
duke
parents:
diff changeset
1479 // This operation might block. We call that after all safepoint checks for a new thread has
a61af66fc99e Initial load
duke
parents:
diff changeset
1480 // been completed.
a61af66fc99e Initial load
duke
parents:
diff changeset
1481 this->set_active_handles(JNIHandleBlock::allocate_block());
a61af66fc99e Initial load
duke
parents:
diff changeset
1482
a61af66fc99e Initial load
duke
parents:
diff changeset
1483 if (JvmtiExport::should_post_thread_life()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1484 JvmtiExport::post_thread_start(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1485 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1486
a61af66fc99e Initial load
duke
parents:
diff changeset
1487 // We call another function to do the rest so we are sure that the stack addresses used
a61af66fc99e Initial load
duke
parents:
diff changeset
1488 // from there will be lower than the stack base just computed
a61af66fc99e Initial load
duke
parents:
diff changeset
1489 thread_main_inner();
a61af66fc99e Initial load
duke
parents:
diff changeset
1490
a61af66fc99e Initial load
duke
parents:
diff changeset
1491 // Note, thread is no longer valid at this point!
a61af66fc99e Initial load
duke
parents:
diff changeset
1492 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1493
a61af66fc99e Initial load
duke
parents:
diff changeset
1494
a61af66fc99e Initial load
duke
parents:
diff changeset
1495 void JavaThread::thread_main_inner() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1496 assert(JavaThread::current() == this, "sanity check");
a61af66fc99e Initial load
duke
parents:
diff changeset
1497 assert(this->threadObj() != NULL, "just checking");
a61af66fc99e Initial load
duke
parents:
diff changeset
1498
a61af66fc99e Initial load
duke
parents:
diff changeset
1499 // Execute thread entry point. If this thread is being asked to restart,
a61af66fc99e Initial load
duke
parents:
diff changeset
1500 // or has been stopped before starting, do not reexecute entry point.
a61af66fc99e Initial load
duke
parents:
diff changeset
1501 // Note: Due to JVM_StopThread we can have pending exceptions already!
a61af66fc99e Initial load
duke
parents:
diff changeset
1502 if (!this->has_pending_exception() && !java_lang_Thread::is_stillborn(this->threadObj())) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1503 // enter the thread's entry point only if we have no pending exceptions
a61af66fc99e Initial load
duke
parents:
diff changeset
1504 HandleMark hm(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1505 this->entry_point()(this, this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1506 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1507
a61af66fc99e Initial load
duke
parents:
diff changeset
1508 DTRACE_THREAD_PROBE(stop, this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1509
a61af66fc99e Initial load
duke
parents:
diff changeset
1510 this->exit(false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1511 delete this;
a61af66fc99e Initial load
duke
parents:
diff changeset
1512 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1513
a61af66fc99e Initial load
duke
parents:
diff changeset
1514
a61af66fc99e Initial load
duke
parents:
diff changeset
1515 static void ensure_join(JavaThread* thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1516 // We do not need to grap the Threads_lock, since we are operating on ourself.
a61af66fc99e Initial load
duke
parents:
diff changeset
1517 Handle threadObj(thread, thread->threadObj());
a61af66fc99e Initial load
duke
parents:
diff changeset
1518 assert(threadObj.not_null(), "java thread object must exist");
a61af66fc99e Initial load
duke
parents:
diff changeset
1519 ObjectLocker lock(threadObj, thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
1520 // Ignore pending exception (ThreadDeath), since we are exiting anyway
a61af66fc99e Initial load
duke
parents:
diff changeset
1521 thread->clear_pending_exception();
a61af66fc99e Initial load
duke
parents:
diff changeset
1522 // It is of profound importance that we set the stillborn bit and reset the thread object,
a61af66fc99e Initial load
duke
parents:
diff changeset
1523 // before we do the notify. Since, changing these two variable will make JVM_IsAlive return
a61af66fc99e Initial load
duke
parents:
diff changeset
1524 // false. So in case another thread is doing a join on this thread , it will detect that the thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1525 // is dead when it gets notified.
a61af66fc99e Initial load
duke
parents:
diff changeset
1526 java_lang_Thread::set_stillborn(threadObj());
a61af66fc99e Initial load
duke
parents:
diff changeset
1527 // Thread is exiting. So set thread_status field in java.lang.Thread class to TERMINATED.
a61af66fc99e Initial load
duke
parents:
diff changeset
1528 java_lang_Thread::set_thread_status(threadObj(), java_lang_Thread::TERMINATED);
a61af66fc99e Initial load
duke
parents:
diff changeset
1529 java_lang_Thread::set_thread(threadObj(), NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1530 lock.notify_all(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
1531 // Ignore pending exception (ThreadDeath), since we are exiting anyway
a61af66fc99e Initial load
duke
parents:
diff changeset
1532 thread->clear_pending_exception();
a61af66fc99e Initial load
duke
parents:
diff changeset
1533 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1534
441
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1535
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1536 // For any new cleanup additions, please check to see if they need to be applied to
a61af66fc99e Initial load
duke
parents:
diff changeset
1537 // cleanup_failed_attach_current_thread as well.
a61af66fc99e Initial load
duke
parents:
diff changeset
1538 void JavaThread::exit(bool destroy_vm, ExitType exit_type) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1539 assert(this == JavaThread::current(), "thread consistency check");
a61af66fc99e Initial load
duke
parents:
diff changeset
1540 if (!InitializeJavaLangSystem) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
1541
a61af66fc99e Initial load
duke
parents:
diff changeset
1542 HandleMark hm(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1543 Handle uncaught_exception(this, this->pending_exception());
a61af66fc99e Initial load
duke
parents:
diff changeset
1544 this->clear_pending_exception();
a61af66fc99e Initial load
duke
parents:
diff changeset
1545 Handle threadObj(this, this->threadObj());
a61af66fc99e Initial load
duke
parents:
diff changeset
1546 assert(threadObj.not_null(), "Java thread object should be created");
a61af66fc99e Initial load
duke
parents:
diff changeset
1547
a61af66fc99e Initial load
duke
parents:
diff changeset
1548 if (get_thread_profiler() != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1549 get_thread_profiler()->disengage();
a61af66fc99e Initial load
duke
parents:
diff changeset
1550 ResourceMark rm;
a61af66fc99e Initial load
duke
parents:
diff changeset
1551 get_thread_profiler()->print(get_thread_name());
a61af66fc99e Initial load
duke
parents:
diff changeset
1552 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1553
a61af66fc99e Initial load
duke
parents:
diff changeset
1554
a61af66fc99e Initial load
duke
parents:
diff changeset
1555 // FIXIT: This code should be moved into else part, when reliable 1.2/1.3 check is in place
a61af66fc99e Initial load
duke
parents:
diff changeset
1556 {
a61af66fc99e Initial load
duke
parents:
diff changeset
1557 EXCEPTION_MARK;
a61af66fc99e Initial load
duke
parents:
diff changeset
1558
a61af66fc99e Initial load
duke
parents:
diff changeset
1559 CLEAR_PENDING_EXCEPTION;
a61af66fc99e Initial load
duke
parents:
diff changeset
1560 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1561 // FIXIT: The is_null check is only so it works better on JDK1.2 VM's. This
a61af66fc99e Initial load
duke
parents:
diff changeset
1562 // has to be fixed by a runtime query method
a61af66fc99e Initial load
duke
parents:
diff changeset
1563 if (!destroy_vm || JDK_Version::is_jdk12x_version()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1564 // JSR-166: change call from from ThreadGroup.uncaughtException to
a61af66fc99e Initial load
duke
parents:
diff changeset
1565 // java.lang.Thread.dispatchUncaughtException
a61af66fc99e Initial load
duke
parents:
diff changeset
1566 if (uncaught_exception.not_null()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1567 Handle group(this, java_lang_Thread::threadGroup(threadObj()));
a61af66fc99e Initial load
duke
parents:
diff changeset
1568 Events::log("uncaught exception INTPTR_FORMAT " " INTPTR_FORMAT " " INTPTR_FORMAT",
a61af66fc99e Initial load
duke
parents:
diff changeset
1569 (address)uncaught_exception(), (address)threadObj(), (address)group());
a61af66fc99e Initial load
duke
parents:
diff changeset
1570 {
a61af66fc99e Initial load
duke
parents:
diff changeset
1571 EXCEPTION_MARK;
a61af66fc99e Initial load
duke
parents:
diff changeset
1572 // Check if the method Thread.dispatchUncaughtException() exists. If so
a61af66fc99e Initial load
duke
parents:
diff changeset
1573 // call it. Otherwise we have an older library without the JSR-166 changes,
a61af66fc99e Initial load
duke
parents:
diff changeset
1574 // so call ThreadGroup.uncaughtException()
a61af66fc99e Initial load
duke
parents:
diff changeset
1575 KlassHandle recvrKlass(THREAD, threadObj->klass());
a61af66fc99e Initial load
duke
parents:
diff changeset
1576 CallInfo callinfo;
1142
4ce7240d622c 6914300: ciEnv should export all well known classes
never
parents: 1135
diff changeset
1577 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass());
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1578 LinkResolver::resolve_virtual_call(callinfo, threadObj, recvrKlass, thread_klass,
a61af66fc99e Initial load
duke
parents:
diff changeset
1579 vmSymbolHandles::dispatchUncaughtException_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1580 vmSymbolHandles::throwable_void_signature(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1581 KlassHandle(), false, false, THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
1582 CLEAR_PENDING_EXCEPTION;
a61af66fc99e Initial load
duke
parents:
diff changeset
1583 methodHandle method = callinfo.selected_method();
a61af66fc99e Initial load
duke
parents:
diff changeset
1584 if (method.not_null()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1585 JavaValue result(T_VOID);
a61af66fc99e Initial load
duke
parents:
diff changeset
1586 JavaCalls::call_virtual(&result,
a61af66fc99e Initial load
duke
parents:
diff changeset
1587 threadObj, thread_klass,
a61af66fc99e Initial load
duke
parents:
diff changeset
1588 vmSymbolHandles::dispatchUncaughtException_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1589 vmSymbolHandles::throwable_void_signature(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1590 uncaught_exception,
a61af66fc99e Initial load
duke
parents:
diff changeset
1591 THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
1592 } else {
1142
4ce7240d622c 6914300: ciEnv should export all well known classes
never
parents: 1135
diff changeset
1593 KlassHandle thread_group(THREAD, SystemDictionary::ThreadGroup_klass());
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1594 JavaValue result(T_VOID);
a61af66fc99e Initial load
duke
parents:
diff changeset
1595 JavaCalls::call_virtual(&result,
a61af66fc99e Initial load
duke
parents:
diff changeset
1596 group, thread_group,
a61af66fc99e Initial load
duke
parents:
diff changeset
1597 vmSymbolHandles::uncaughtException_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1598 vmSymbolHandles::thread_throwable_void_signature(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1599 threadObj, // Arg 1
a61af66fc99e Initial load
duke
parents:
diff changeset
1600 uncaught_exception, // Arg 2
a61af66fc99e Initial load
duke
parents:
diff changeset
1601 THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
1602 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1603 CLEAR_PENDING_EXCEPTION;
a61af66fc99e Initial load
duke
parents:
diff changeset
1604 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1605 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1606
a61af66fc99e Initial load
duke
parents:
diff changeset
1607 // Call Thread.exit(). We try 3 times in case we got another Thread.stop during
a61af66fc99e Initial load
duke
parents:
diff changeset
1608 // the execution of the method. If that is not enough, then we don't really care. Thread.stop
a61af66fc99e Initial load
duke
parents:
diff changeset
1609 // is deprecated anyhow.
a61af66fc99e Initial load
duke
parents:
diff changeset
1610 { int count = 3;
a61af66fc99e Initial load
duke
parents:
diff changeset
1611 while (java_lang_Thread::threadGroup(threadObj()) != NULL && (count-- > 0)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1612 EXCEPTION_MARK;
a61af66fc99e Initial load
duke
parents:
diff changeset
1613 JavaValue result(T_VOID);
1142
4ce7240d622c 6914300: ciEnv should export all well known classes
never
parents: 1135
diff changeset
1614 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass());
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1615 JavaCalls::call_virtual(&result,
a61af66fc99e Initial load
duke
parents:
diff changeset
1616 threadObj, thread_klass,
a61af66fc99e Initial load
duke
parents:
diff changeset
1617 vmSymbolHandles::exit_method_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1618 vmSymbolHandles::void_method_signature(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1619 THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
1620 CLEAR_PENDING_EXCEPTION;
a61af66fc99e Initial load
duke
parents:
diff changeset
1621 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1622 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1623
a61af66fc99e Initial load
duke
parents:
diff changeset
1624 // notify JVMTI
a61af66fc99e Initial load
duke
parents:
diff changeset
1625 if (JvmtiExport::should_post_thread_life()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1626 JvmtiExport::post_thread_end(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1627 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1628
a61af66fc99e Initial load
duke
parents:
diff changeset
1629 // We have notified the agents that we are exiting, before we go on,
a61af66fc99e Initial load
duke
parents:
diff changeset
1630 // we must check for a pending external suspend request and honor it
a61af66fc99e Initial load
duke
parents:
diff changeset
1631 // in order to not surprise the thread that made the suspend request.
a61af66fc99e Initial load
duke
parents:
diff changeset
1632 while (true) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1633 {
a61af66fc99e Initial load
duke
parents:
diff changeset
1634 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
1635 if (!is_external_suspend()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1636 set_terminated(_thread_exiting);
a61af66fc99e Initial load
duke
parents:
diff changeset
1637 ThreadService::current_thread_exiting(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1638 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
1639 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1640 // Implied else:
a61af66fc99e Initial load
duke
parents:
diff changeset
1641 // Things get a little tricky here. We have a pending external
a61af66fc99e Initial load
duke
parents:
diff changeset
1642 // suspend request, but we are holding the SR_lock so we
a61af66fc99e Initial load
duke
parents:
diff changeset
1643 // can't just self-suspend. So we temporarily drop the lock
a61af66fc99e Initial load
duke
parents:
diff changeset
1644 // and then self-suspend.
a61af66fc99e Initial load
duke
parents:
diff changeset
1645 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1646
a61af66fc99e Initial load
duke
parents:
diff changeset
1647 ThreadBlockInVM tbivm(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1648 java_suspend_self();
a61af66fc99e Initial load
duke
parents:
diff changeset
1649
a61af66fc99e Initial load
duke
parents:
diff changeset
1650 // We're done with this suspend request, but we have to loop around
a61af66fc99e Initial load
duke
parents:
diff changeset
1651 // and check again. Eventually we will get SR_lock without a pending
a61af66fc99e Initial load
duke
parents:
diff changeset
1652 // external suspend request and will be able to mark ourselves as
a61af66fc99e Initial load
duke
parents:
diff changeset
1653 // exiting.
a61af66fc99e Initial load
duke
parents:
diff changeset
1654 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1655 // no more external suspends are allowed at this point
a61af66fc99e Initial load
duke
parents:
diff changeset
1656 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1657 // before_exit() has already posted JVMTI THREAD_END events
a61af66fc99e Initial load
duke
parents:
diff changeset
1658 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1659
a61af66fc99e Initial load
duke
parents:
diff changeset
1660 // Notify waiters on thread object. This has to be done after exit() is called
a61af66fc99e Initial load
duke
parents:
diff changeset
1661 // on the thread (if the thread is the last thread in a daemon ThreadGroup the
a61af66fc99e Initial load
duke
parents:
diff changeset
1662 // group should have the destroyed bit set before waiters are notified).
a61af66fc99e Initial load
duke
parents:
diff changeset
1663 ensure_join(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1664 assert(!this->has_pending_exception(), "ensure_join should have cleared");
a61af66fc99e Initial load
duke
parents:
diff changeset
1665
a61af66fc99e Initial load
duke
parents:
diff changeset
1666 // 6282335 JNI DetachCurrentThread spec states that all Java monitors
a61af66fc99e Initial load
duke
parents:
diff changeset
1667 // held by this thread must be released. A detach operation must only
a61af66fc99e Initial load
duke
parents:
diff changeset
1668 // get here if there are no Java frames on the stack. Therefore, any
a61af66fc99e Initial load
duke
parents:
diff changeset
1669 // owned monitors at this point MUST be JNI-acquired monitors which are
a61af66fc99e Initial load
duke
parents:
diff changeset
1670 // pre-inflated and in the monitor cache.
a61af66fc99e Initial load
duke
parents:
diff changeset
1671 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1672 // ensure_join() ignores IllegalThreadStateExceptions, and so does this.
a61af66fc99e Initial load
duke
parents:
diff changeset
1673 if (exit_type == jni_detach && JNIDetachReleasesMonitors) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1674 assert(!this->has_last_Java_frame(), "detaching with Java frames?");
a61af66fc99e Initial load
duke
parents:
diff changeset
1675 ObjectSynchronizer::release_monitors_owned_by_thread(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1676 assert(!this->has_pending_exception(), "release_monitors should have cleared");
a61af66fc99e Initial load
duke
parents:
diff changeset
1677 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1678
a61af66fc99e Initial load
duke
parents:
diff changeset
1679 // These things needs to be done while we are still a Java Thread. Make sure that thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1680 // is in a consistent state, in case GC happens
a61af66fc99e Initial load
duke
parents:
diff changeset
1681 assert(_privileged_stack_top == NULL, "must be NULL when we get here");
a61af66fc99e Initial load
duke
parents:
diff changeset
1682
a61af66fc99e Initial load
duke
parents:
diff changeset
1683 if (active_handles() != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1684 JNIHandleBlock* block = active_handles();
a61af66fc99e Initial load
duke
parents:
diff changeset
1685 set_active_handles(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1686 JNIHandleBlock::release_block(block);
a61af66fc99e Initial load
duke
parents:
diff changeset
1687 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1688
a61af66fc99e Initial load
duke
parents:
diff changeset
1689 if (free_handle_block() != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1690 JNIHandleBlock* block = free_handle_block();
a61af66fc99e Initial load
duke
parents:
diff changeset
1691 set_free_handle_block(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
1692 JNIHandleBlock::release_block(block);
a61af66fc99e Initial load
duke
parents:
diff changeset
1693 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1694
a61af66fc99e Initial load
duke
parents:
diff changeset
1695 // These have to be removed while this is still a valid thread.
a61af66fc99e Initial load
duke
parents:
diff changeset
1696 remove_stack_guard_pages();
a61af66fc99e Initial load
duke
parents:
diff changeset
1697
a61af66fc99e Initial load
duke
parents:
diff changeset
1698 if (UseTLAB) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1699 tlab().make_parsable(true); // retire TLAB
a61af66fc99e Initial load
duke
parents:
diff changeset
1700 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1701
49
31000d79ec71 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 0
diff changeset
1702 if (jvmti_thread_state() != NULL) {
31000d79ec71 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 0
diff changeset
1703 JvmtiExport::cleanup_thread(this);
31000d79ec71 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 0
diff changeset
1704 }
31000d79ec71 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 0
diff changeset
1705
441
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1706 #ifndef SERIALGC
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1707 // We must flush G1-related buffers before removing a thread from
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1708 // the list of active threads.
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1709 if (UseG1GC) {
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1710 flush_barrier_queues();
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1711 }
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1712 #endif
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1713
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1714 // Remove from list of active threads list, and notify VM thread if we are the last non-daemon thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1715 Threads::remove(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1716 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1717
441
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1718 #ifndef SERIALGC
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1719 // Flush G1-related queues.
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1720 void JavaThread::flush_barrier_queues() {
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1721 satb_mark_queue().flush();
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1722 dirty_card_queue().flush();
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1723 }
1842
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1724
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1725 void JavaThread::initialize_queues() {
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1726 assert(!SafepointSynchronize::is_at_safepoint(),
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1727 "we should not be at a safepoint");
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1728
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1729 ObjPtrQueue& satb_queue = satb_mark_queue();
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1730 SATBMarkQueueSet& satb_queue_set = satb_mark_queue_set();
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1731 // The SATB queue should have been constructed with its active
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1732 // field set to false.
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1733 assert(!satb_queue.is_active(), "SATB queue should not be active");
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1734 assert(satb_queue.is_empty(), "SATB queue should be empty");
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1735 // If we are creating the thread during a marking cycle, we should
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1736 // set the active field of the SATB queue to true.
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1737 if (satb_queue_set.is_active()) {
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1738 satb_queue.set_active(true);
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1739 }
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1740
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1741 DirtyCardQueue& dirty_queue = dirty_card_queue();
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1742 // The dirty card queue should have been constructed with its
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1743 // active field set to true.
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1744 assert(dirty_queue.is_active(), "dirty card queue should be active");
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1745 }
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
1746 #endif // !SERIALGC
441
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1747
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1748 void JavaThread::cleanup_failed_attach_current_thread() {
441
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1749 if (get_thread_profiler() != NULL) {
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1750 get_thread_profiler()->disengage();
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1751 ResourceMark rm;
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1752 get_thread_profiler()->print(get_thread_name());
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1753 }
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1754
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1755 if (active_handles() != NULL) {
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1756 JNIHandleBlock* block = active_handles();
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1757 set_active_handles(NULL);
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1758 JNIHandleBlock::release_block(block);
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1759 }
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1760
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1761 if (free_handle_block() != NULL) {
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1762 JNIHandleBlock* block = free_handle_block();
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1763 set_free_handle_block(NULL);
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1764 JNIHandleBlock::release_block(block);
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1765 }
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1766
1290
c8a467bf56ad 6914050: jvm assertion "guard pages must be in use" in -Xcomp mode
coleenp
parents: 1213
diff changeset
1767 // These have to be removed while this is still a valid thread.
c8a467bf56ad 6914050: jvm assertion "guard pages must be in use" in -Xcomp mode
coleenp
parents: 1213
diff changeset
1768 remove_stack_guard_pages();
c8a467bf56ad 6914050: jvm assertion "guard pages must be in use" in -Xcomp mode
coleenp
parents: 1213
diff changeset
1769
441
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1770 if (UseTLAB) {
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1771 tlab().make_parsable(true); // retire TLAB, if any
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1772 }
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1773
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1774 #ifndef SERIALGC
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1775 if (UseG1GC) {
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1776 flush_barrier_queues();
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1777 }
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1778 #endif
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1779
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1780 Threads::remove(this);
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1781 delete this;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1782 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1783
a61af66fc99e Initial load
duke
parents:
diff changeset
1784
441
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1785
da9cb4e97a5f 6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents: 383
diff changeset
1786
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1787 JavaThread* JavaThread::active() {
a61af66fc99e Initial load
duke
parents:
diff changeset
1788 Thread* thread = ThreadLocalStorage::thread();
a61af66fc99e Initial load
duke
parents:
diff changeset
1789 assert(thread != NULL, "just checking");
a61af66fc99e Initial load
duke
parents:
diff changeset
1790 if (thread->is_Java_thread()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1791 return (JavaThread*) thread;
a61af66fc99e Initial load
duke
parents:
diff changeset
1792 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1793 assert(thread->is_VM_thread(), "this must be a vm thread");
a61af66fc99e Initial load
duke
parents:
diff changeset
1794 VM_Operation* op = ((VMThread*) thread)->vm_operation();
a61af66fc99e Initial load
duke
parents:
diff changeset
1795 JavaThread *ret=op == NULL ? NULL : (JavaThread *)op->calling_thread();
a61af66fc99e Initial load
duke
parents:
diff changeset
1796 assert(ret->is_Java_thread(), "must be a Java thread");
a61af66fc99e Initial load
duke
parents:
diff changeset
1797 return ret;
a61af66fc99e Initial load
duke
parents:
diff changeset
1798 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1799 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1800
a61af66fc99e Initial load
duke
parents:
diff changeset
1801 bool JavaThread::is_lock_owned(address adr) const {
702
b9fba36710f2 6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents: 669
diff changeset
1802 if (Thread::is_lock_owned(adr)) return true;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1803
a61af66fc99e Initial load
duke
parents:
diff changeset
1804 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1805 if (chunk->contains(adr)) return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1806 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1807
a61af66fc99e Initial load
duke
parents:
diff changeset
1808 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1809 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1810
a61af66fc99e Initial load
duke
parents:
diff changeset
1811
a61af66fc99e Initial load
duke
parents:
diff changeset
1812 void JavaThread::add_monitor_chunk(MonitorChunk* chunk) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1813 chunk->set_next(monitor_chunks());
a61af66fc99e Initial load
duke
parents:
diff changeset
1814 set_monitor_chunks(chunk);
a61af66fc99e Initial load
duke
parents:
diff changeset
1815 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1816
a61af66fc99e Initial load
duke
parents:
diff changeset
1817 void JavaThread::remove_monitor_chunk(MonitorChunk* chunk) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1818 guarantee(monitor_chunks() != NULL, "must be non empty");
a61af66fc99e Initial load
duke
parents:
diff changeset
1819 if (monitor_chunks() == chunk) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1820 set_monitor_chunks(chunk->next());
a61af66fc99e Initial load
duke
parents:
diff changeset
1821 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1822 MonitorChunk* prev = monitor_chunks();
a61af66fc99e Initial load
duke
parents:
diff changeset
1823 while (prev->next() != chunk) prev = prev->next();
a61af66fc99e Initial load
duke
parents:
diff changeset
1824 prev->set_next(chunk->next());
a61af66fc99e Initial load
duke
parents:
diff changeset
1825 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1826 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1827
a61af66fc99e Initial load
duke
parents:
diff changeset
1828 // JVM support.
a61af66fc99e Initial load
duke
parents:
diff changeset
1829
a61af66fc99e Initial load
duke
parents:
diff changeset
1830 // Note: this function shouldn't block if it's called in
a61af66fc99e Initial load
duke
parents:
diff changeset
1831 // _thread_in_native_trans state (such as from
a61af66fc99e Initial load
duke
parents:
diff changeset
1832 // check_special_condition_for_native_trans()).
a61af66fc99e Initial load
duke
parents:
diff changeset
1833 void JavaThread::check_and_handle_async_exceptions(bool check_unsafe_error) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1834
a61af66fc99e Initial load
duke
parents:
diff changeset
1835 if (has_last_Java_frame() && has_async_condition()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1836 // If we are at a polling page safepoint (not a poll return)
a61af66fc99e Initial load
duke
parents:
diff changeset
1837 // then we must defer async exception because live registers
a61af66fc99e Initial load
duke
parents:
diff changeset
1838 // will be clobbered by the exception path. Poll return is
a61af66fc99e Initial load
duke
parents:
diff changeset
1839 // ok because the call we a returning from already collides
a61af66fc99e Initial load
duke
parents:
diff changeset
1840 // with exception handling registers and so there is no issue.
a61af66fc99e Initial load
duke
parents:
diff changeset
1841 // (The exception handling path kills call result registers but
a61af66fc99e Initial load
duke
parents:
diff changeset
1842 // this is ok since the exception kills the result anyway).
a61af66fc99e Initial load
duke
parents:
diff changeset
1843
a61af66fc99e Initial load
duke
parents:
diff changeset
1844 if (is_at_poll_safepoint()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1845 // if the code we are returning to has deoptimized we must defer
a61af66fc99e Initial load
duke
parents:
diff changeset
1846 // the exception otherwise live registers get clobbered on the
a61af66fc99e Initial load
duke
parents:
diff changeset
1847 // exception path before deoptimization is able to retrieve them.
a61af66fc99e Initial load
duke
parents:
diff changeset
1848 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1849 RegisterMap map(this, false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1850 frame caller_fr = last_frame().sender(&map);
a61af66fc99e Initial load
duke
parents:
diff changeset
1851 assert(caller_fr.is_compiled_frame(), "what?");
a61af66fc99e Initial load
duke
parents:
diff changeset
1852 if (caller_fr.is_deoptimized_frame()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1853 if (TraceExceptions) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1854 ResourceMark rm;
a61af66fc99e Initial load
duke
parents:
diff changeset
1855 tty->print_cr("deferred async exception at compiled safepoint");
a61af66fc99e Initial load
duke
parents:
diff changeset
1856 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1857 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
1858 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1859 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1860 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1861
a61af66fc99e Initial load
duke
parents:
diff changeset
1862 JavaThread::AsyncRequests condition = clear_special_runtime_exit_condition();
a61af66fc99e Initial load
duke
parents:
diff changeset
1863 if (condition == _no_async_condition) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1864 // Conditions have changed since has_special_runtime_exit_condition()
a61af66fc99e Initial load
duke
parents:
diff changeset
1865 // was called:
a61af66fc99e Initial load
duke
parents:
diff changeset
1866 // - if we were here only because of an external suspend request,
a61af66fc99e Initial load
duke
parents:
diff changeset
1867 // then that was taken care of above (or cancelled) so we are done
a61af66fc99e Initial load
duke
parents:
diff changeset
1868 // - if we were here because of another async request, then it has
a61af66fc99e Initial load
duke
parents:
diff changeset
1869 // been cleared between the has_special_runtime_exit_condition()
a61af66fc99e Initial load
duke
parents:
diff changeset
1870 // and now so again we are done
a61af66fc99e Initial load
duke
parents:
diff changeset
1871 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
1872 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1873
a61af66fc99e Initial load
duke
parents:
diff changeset
1874 // Check for pending async. exception
a61af66fc99e Initial load
duke
parents:
diff changeset
1875 if (_pending_async_exception != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1876 // Only overwrite an already pending exception, if it is not a threadDeath.
1142
4ce7240d622c 6914300: ciEnv should export all well known classes
never
parents: 1135
diff changeset
1877 if (!has_pending_exception() || !pending_exception()->is_a(SystemDictionary::ThreadDeath_klass())) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1878
a61af66fc99e Initial load
duke
parents:
diff changeset
1879 // We cannot call Exceptions::_throw(...) here because we cannot block
a61af66fc99e Initial load
duke
parents:
diff changeset
1880 set_pending_exception(_pending_async_exception, __FILE__, __LINE__);
a61af66fc99e Initial load
duke
parents:
diff changeset
1881
a61af66fc99e Initial load
duke
parents:
diff changeset
1882 if (TraceExceptions) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1883 ResourceMark rm;
a61af66fc99e Initial load
duke
parents:
diff changeset
1884 tty->print("Async. exception installed at runtime exit (" INTPTR_FORMAT ")", this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1885 if (has_last_Java_frame() ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1886 frame f = last_frame();
a61af66fc99e Initial load
duke
parents:
diff changeset
1887 tty->print(" (pc: " INTPTR_FORMAT " sp: " INTPTR_FORMAT " )", f.pc(), f.sp());
a61af66fc99e Initial load
duke
parents:
diff changeset
1888 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1889 tty->print_cr(" of type: %s", instanceKlass::cast(_pending_async_exception->klass())->external_name());
a61af66fc99e Initial load
duke
parents:
diff changeset
1890 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1891 _pending_async_exception = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1892 clear_has_async_exception();
a61af66fc99e Initial load
duke
parents:
diff changeset
1893 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1894 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1895
a61af66fc99e Initial load
duke
parents:
diff changeset
1896 if (check_unsafe_error &&
a61af66fc99e Initial load
duke
parents:
diff changeset
1897 condition == _async_unsafe_access_error && !has_pending_exception()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1898 condition = _no_async_condition; // done
a61af66fc99e Initial load
duke
parents:
diff changeset
1899 switch (thread_state()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1900 case _thread_in_vm:
a61af66fc99e Initial load
duke
parents:
diff changeset
1901 {
a61af66fc99e Initial load
duke
parents:
diff changeset
1902 JavaThread* THREAD = this;
a61af66fc99e Initial load
duke
parents:
diff changeset
1903 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation");
a61af66fc99e Initial load
duke
parents:
diff changeset
1904 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1905 case _thread_in_native:
a61af66fc99e Initial load
duke
parents:
diff changeset
1906 {
a61af66fc99e Initial load
duke
parents:
diff changeset
1907 ThreadInVMfromNative tiv(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1908 JavaThread* THREAD = this;
a61af66fc99e Initial load
duke
parents:
diff changeset
1909 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation");
a61af66fc99e Initial load
duke
parents:
diff changeset
1910 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1911 case _thread_in_Java:
a61af66fc99e Initial load
duke
parents:
diff changeset
1912 {
a61af66fc99e Initial load
duke
parents:
diff changeset
1913 ThreadInVMfromJava tiv(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1914 JavaThread* THREAD = this;
a61af66fc99e Initial load
duke
parents:
diff changeset
1915 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in a recent unsafe memory access operation in compiled Java code");
a61af66fc99e Initial load
duke
parents:
diff changeset
1916 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1917 default:
a61af66fc99e Initial load
duke
parents:
diff changeset
1918 ShouldNotReachHere();
a61af66fc99e Initial load
duke
parents:
diff changeset
1919 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1920 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1921
a61af66fc99e Initial load
duke
parents:
diff changeset
1922 assert(condition == _no_async_condition || has_pending_exception() ||
a61af66fc99e Initial load
duke
parents:
diff changeset
1923 (!check_unsafe_error && condition == _async_unsafe_access_error),
a61af66fc99e Initial load
duke
parents:
diff changeset
1924 "must have handled the async condition, if no exception");
a61af66fc99e Initial load
duke
parents:
diff changeset
1925 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1926
a61af66fc99e Initial load
duke
parents:
diff changeset
1927 void JavaThread::handle_special_runtime_exit_condition(bool check_asyncs) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1928 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1929 // Check for pending external suspend. Internal suspend requests do
a61af66fc99e Initial load
duke
parents:
diff changeset
1930 // not use handle_special_runtime_exit_condition().
a61af66fc99e Initial load
duke
parents:
diff changeset
1931 // If JNIEnv proxies are allowed, don't self-suspend if the target
a61af66fc99e Initial load
duke
parents:
diff changeset
1932 // thread is not the current thread. In older versions of jdbx, jdbx
a61af66fc99e Initial load
duke
parents:
diff changeset
1933 // threads could call into the VM with another thread's JNIEnv so we
a61af66fc99e Initial load
duke
parents:
diff changeset
1934 // can be here operating on behalf of a suspended thread (4432884).
a61af66fc99e Initial load
duke
parents:
diff changeset
1935 bool do_self_suspend = is_external_suspend_with_lock();
a61af66fc99e Initial load
duke
parents:
diff changeset
1936 if (do_self_suspend && (!AllowJNIEnvProxy || this == JavaThread::current())) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1937 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1938 // Because thread is external suspended the safepoint code will count
a61af66fc99e Initial load
duke
parents:
diff changeset
1939 // thread as at a safepoint. This can be odd because we can be here
a61af66fc99e Initial load
duke
parents:
diff changeset
1940 // as _thread_in_Java which would normally transition to _thread_blocked
a61af66fc99e Initial load
duke
parents:
diff changeset
1941 // at a safepoint. We would like to mark the thread as _thread_blocked
a61af66fc99e Initial load
duke
parents:
diff changeset
1942 // before calling java_suspend_self like all other callers of it but
a61af66fc99e Initial load
duke
parents:
diff changeset
1943 // we must then observe proper safepoint protocol. (We can't leave
a61af66fc99e Initial load
duke
parents:
diff changeset
1944 // _thread_blocked with a safepoint in progress). However we can be
a61af66fc99e Initial load
duke
parents:
diff changeset
1945 // here as _thread_in_native_trans so we can't use a normal transition
a61af66fc99e Initial load
duke
parents:
diff changeset
1946 // constructor/destructor pair because they assert on that type of
a61af66fc99e Initial load
duke
parents:
diff changeset
1947 // transition. We could do something like:
a61af66fc99e Initial load
duke
parents:
diff changeset
1948 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1949 // JavaThreadState state = thread_state();
a61af66fc99e Initial load
duke
parents:
diff changeset
1950 // set_thread_state(_thread_in_vm);
a61af66fc99e Initial load
duke
parents:
diff changeset
1951 // {
a61af66fc99e Initial load
duke
parents:
diff changeset
1952 // ThreadBlockInVM tbivm(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1953 // java_suspend_self()
a61af66fc99e Initial load
duke
parents:
diff changeset
1954 // }
a61af66fc99e Initial load
duke
parents:
diff changeset
1955 // set_thread_state(_thread_in_vm_trans);
a61af66fc99e Initial load
duke
parents:
diff changeset
1956 // if (safepoint) block;
a61af66fc99e Initial load
duke
parents:
diff changeset
1957 // set_thread_state(state);
a61af66fc99e Initial load
duke
parents:
diff changeset
1958 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1959 // but that is pretty messy. Instead we just go with the way the
a61af66fc99e Initial load
duke
parents:
diff changeset
1960 // code has worked before and note that this is the only path to
a61af66fc99e Initial load
duke
parents:
diff changeset
1961 // java_suspend_self that doesn't put the thread in _thread_blocked
a61af66fc99e Initial load
duke
parents:
diff changeset
1962 // mode.
a61af66fc99e Initial load
duke
parents:
diff changeset
1963
a61af66fc99e Initial load
duke
parents:
diff changeset
1964 frame_anchor()->make_walkable(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
1965 java_suspend_self();
a61af66fc99e Initial load
duke
parents:
diff changeset
1966
a61af66fc99e Initial load
duke
parents:
diff changeset
1967 // We might be here for reasons in addition to the self-suspend request
a61af66fc99e Initial load
duke
parents:
diff changeset
1968 // so check for other async requests.
a61af66fc99e Initial load
duke
parents:
diff changeset
1969 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1970
a61af66fc99e Initial load
duke
parents:
diff changeset
1971 if (check_asyncs) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1972 check_and_handle_async_exceptions();
a61af66fc99e Initial load
duke
parents:
diff changeset
1973 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1974 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1975
a61af66fc99e Initial load
duke
parents:
diff changeset
1976 void JavaThread::send_thread_stop(oop java_throwable) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1977 assert(Thread::current()->is_VM_thread(), "should be in the vm thread");
a61af66fc99e Initial load
duke
parents:
diff changeset
1978 assert(Threads_lock->is_locked(), "Threads_lock should be locked by safepoint code");
a61af66fc99e Initial load
duke
parents:
diff changeset
1979 assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped");
a61af66fc99e Initial load
duke
parents:
diff changeset
1980
a61af66fc99e Initial load
duke
parents:
diff changeset
1981 // Do not throw asynchronous exceptions against the compiler thread
a61af66fc99e Initial load
duke
parents:
diff changeset
1982 // (the compiler thread should not be a Java thread -- fix in 1.4.2)
a61af66fc99e Initial load
duke
parents:
diff changeset
1983 if (is_Compiler_thread()) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
1984
a61af66fc99e Initial load
duke
parents:
diff changeset
1985 // This is a change from JDK 1.1, but JDK 1.2 will also do it:
1142
4ce7240d622c 6914300: ciEnv should export all well known classes
never
parents: 1135
diff changeset
1986 if (java_throwable->is_a(SystemDictionary::ThreadDeath_klass())) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1987 java_lang_Thread::set_stillborn(threadObj());
a61af66fc99e Initial load
duke
parents:
diff changeset
1988 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1989
a61af66fc99e Initial load
duke
parents:
diff changeset
1990 {
a61af66fc99e Initial load
duke
parents:
diff changeset
1991 // Actually throw the Throwable against the target Thread - however
a61af66fc99e Initial load
duke
parents:
diff changeset
1992 // only if there is no thread death exception installed already.
1142
4ce7240d622c 6914300: ciEnv should export all well known classes
never
parents: 1135
diff changeset
1993 if (_pending_async_exception == NULL || !_pending_async_exception->is_a(SystemDictionary::ThreadDeath_klass())) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1994 // If the topmost frame is a runtime stub, then we are calling into
a61af66fc99e Initial load
duke
parents:
diff changeset
1995 // OptoRuntime from compiled code. Some runtime stubs (new, monitor_exit..)
a61af66fc99e Initial load
duke
parents:
diff changeset
1996 // must deoptimize the caller before continuing, as the compiled exception handler table
a61af66fc99e Initial load
duke
parents:
diff changeset
1997 // may not be valid
a61af66fc99e Initial load
duke
parents:
diff changeset
1998 if (has_last_Java_frame()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1999 frame f = last_frame();
a61af66fc99e Initial load
duke
parents:
diff changeset
2000 if (f.is_runtime_frame() || f.is_safepoint_blob_frame()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2001 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass
a61af66fc99e Initial load
duke
parents:
diff changeset
2002 RegisterMap reg_map(this, UseBiasedLocking);
a61af66fc99e Initial load
duke
parents:
diff changeset
2003 frame compiled_frame = f.sender(&reg_map);
a61af66fc99e Initial load
duke
parents:
diff changeset
2004 if (compiled_frame.can_be_deoptimized()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2005 Deoptimization::deoptimize(this, compiled_frame, &reg_map);
a61af66fc99e Initial load
duke
parents:
diff changeset
2006 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2007 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2008 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2009
a61af66fc99e Initial load
duke
parents:
diff changeset
2010 // Set async. pending exception in thread.
a61af66fc99e Initial load
duke
parents:
diff changeset
2011 set_pending_async_exception(java_throwable);
a61af66fc99e Initial load
duke
parents:
diff changeset
2012
a61af66fc99e Initial load
duke
parents:
diff changeset
2013 if (TraceExceptions) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2014 ResourceMark rm;
a61af66fc99e Initial load
duke
parents:
diff changeset
2015 tty->print_cr("Pending Async. exception installed of type: %s", instanceKlass::cast(_pending_async_exception->klass())->external_name());
a61af66fc99e Initial load
duke
parents:
diff changeset
2016 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2017 // for AbortVMOnException flag
a61af66fc99e Initial load
duke
parents:
diff changeset
2018 NOT_PRODUCT(Exceptions::debug_check_abort(instanceKlass::cast(_pending_async_exception->klass())->external_name()));
a61af66fc99e Initial load
duke
parents:
diff changeset
2019 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2020 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2021
a61af66fc99e Initial load
duke
parents:
diff changeset
2022
a61af66fc99e Initial load
duke
parents:
diff changeset
2023 // Interrupt thread so it will wake up from a potential wait()
a61af66fc99e Initial load
duke
parents:
diff changeset
2024 Thread::interrupt(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
2025 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2026
a61af66fc99e Initial load
duke
parents:
diff changeset
2027 // External suspension mechanism.
a61af66fc99e Initial load
duke
parents:
diff changeset
2028 //
a61af66fc99e Initial load
duke
parents:
diff changeset
2029 // Tell the VM to suspend a thread when ever it knows that it does not hold on
a61af66fc99e Initial load
duke
parents:
diff changeset
2030 // to any VM_locks and it is at a transition
a61af66fc99e Initial load
duke
parents:
diff changeset
2031 // Self-suspension will happen on the transition out of the vm.
a61af66fc99e Initial load
duke
parents:
diff changeset
2032 // Catch "this" coming in from JNIEnv pointers when the thread has been freed
a61af66fc99e Initial load
duke
parents:
diff changeset
2033 //
a61af66fc99e Initial load
duke
parents:
diff changeset
2034 // Guarantees on return:
a61af66fc99e Initial load
duke
parents:
diff changeset
2035 // + Target thread will not execute any new bytecode (that's why we need to
a61af66fc99e Initial load
duke
parents:
diff changeset
2036 // force a safepoint)
a61af66fc99e Initial load
duke
parents:
diff changeset
2037 // + Target thread will not enter any new monitors
a61af66fc99e Initial load
duke
parents:
diff changeset
2038 //
a61af66fc99e Initial load
duke
parents:
diff changeset
2039 void JavaThread::java_suspend() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2040 { MutexLocker mu(Threads_lock);
a61af66fc99e Initial load
duke
parents:
diff changeset
2041 if (!Threads::includes(this) || is_exiting() || this->threadObj() == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2042 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2043 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2044 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2045
a61af66fc99e Initial load
duke
parents:
diff changeset
2046 { MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
2047 if (!is_external_suspend()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2048 // a racing resume has cancelled us; bail out now
a61af66fc99e Initial load
duke
parents:
diff changeset
2049 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2050 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2051
a61af66fc99e Initial load
duke
parents:
diff changeset
2052 // suspend is done
a61af66fc99e Initial load
duke
parents:
diff changeset
2053 uint32_t debug_bits = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2054 // Warning: is_ext_suspend_completed() may temporarily drop the
a61af66fc99e Initial load
duke
parents:
diff changeset
2055 // SR_lock to allow the thread to reach a stable thread state if
a61af66fc99e Initial load
duke
parents:
diff changeset
2056 // it is currently in a transient thread state.
a61af66fc99e Initial load
duke
parents:
diff changeset
2057 if (is_ext_suspend_completed(false /* !called_by_wait */,
a61af66fc99e Initial load
duke
parents:
diff changeset
2058 SuspendRetryDelay, &debug_bits) ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2059 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2060 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2061 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2062
a61af66fc99e Initial load
duke
parents:
diff changeset
2063 VM_ForceSafepoint vm_suspend;
a61af66fc99e Initial load
duke
parents:
diff changeset
2064 VMThread::execute(&vm_suspend);
a61af66fc99e Initial load
duke
parents:
diff changeset
2065 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2066
a61af66fc99e Initial load
duke
parents:
diff changeset
2067 // Part II of external suspension.
a61af66fc99e Initial load
duke
parents:
diff changeset
2068 // A JavaThread self suspends when it detects a pending external suspend
a61af66fc99e Initial load
duke
parents:
diff changeset
2069 // request. This is usually on transitions. It is also done in places
a61af66fc99e Initial load
duke
parents:
diff changeset
2070 // where continuing to the next transition would surprise the caller,
a61af66fc99e Initial load
duke
parents:
diff changeset
2071 // e.g., monitor entry.
a61af66fc99e Initial load
duke
parents:
diff changeset
2072 //
a61af66fc99e Initial load
duke
parents:
diff changeset
2073 // Returns the number of times that the thread self-suspended.
a61af66fc99e Initial load
duke
parents:
diff changeset
2074 //
a61af66fc99e Initial load
duke
parents:
diff changeset
2075 // Note: DO NOT call java_suspend_self() when you just want to block current
a61af66fc99e Initial load
duke
parents:
diff changeset
2076 // thread. java_suspend_self() is the second stage of cooperative
a61af66fc99e Initial load
duke
parents:
diff changeset
2077 // suspension for external suspend requests and should only be used
a61af66fc99e Initial load
duke
parents:
diff changeset
2078 // to complete an external suspend request.
a61af66fc99e Initial load
duke
parents:
diff changeset
2079 //
a61af66fc99e Initial load
duke
parents:
diff changeset
2080 int JavaThread::java_suspend_self() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2081 int ret = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2082
a61af66fc99e Initial load
duke
parents:
diff changeset
2083 // we are in the process of exiting so don't suspend
a61af66fc99e Initial load
duke
parents:
diff changeset
2084 if (is_exiting()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2085 clear_external_suspend();
a61af66fc99e Initial load
duke
parents:
diff changeset
2086 return ret;
a61af66fc99e Initial load
duke
parents:
diff changeset
2087 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2088
a61af66fc99e Initial load
duke
parents:
diff changeset
2089 assert(_anchor.walkable() ||
a61af66fc99e Initial load
duke
parents:
diff changeset
2090 (is_Java_thread() && !((JavaThread*)this)->has_last_Java_frame()),
a61af66fc99e Initial load
duke
parents:
diff changeset
2091 "must have walkable stack");
a61af66fc99e Initial load
duke
parents:
diff changeset
2092
a61af66fc99e Initial load
duke
parents:
diff changeset
2093 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
2094
979
87770dcf831b 6876794: 4/4 sp07t002 hangs very intermittently
dcubed
parents: 844
diff changeset
2095 assert(!this->is_ext_suspended(),
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2096 "a thread trying to self-suspend should not already be suspended");
a61af66fc99e Initial load
duke
parents:
diff changeset
2097
a61af66fc99e Initial load
duke
parents:
diff changeset
2098 if (this->is_suspend_equivalent()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2099 // If we are self-suspending as a result of the lifting of a
a61af66fc99e Initial load
duke
parents:
diff changeset
2100 // suspend equivalent condition, then the suspend_equivalent
a61af66fc99e Initial load
duke
parents:
diff changeset
2101 // flag is not cleared until we set the ext_suspended flag so
a61af66fc99e Initial load
duke
parents:
diff changeset
2102 // that wait_for_ext_suspend_completion() returns consistent
a61af66fc99e Initial load
duke
parents:
diff changeset
2103 // results.
a61af66fc99e Initial load
duke
parents:
diff changeset
2104 this->clear_suspend_equivalent();
a61af66fc99e Initial load
duke
parents:
diff changeset
2105 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2106
a61af66fc99e Initial load
duke
parents:
diff changeset
2107 // A racing resume may have cancelled us before we grabbed SR_lock
a61af66fc99e Initial load
duke
parents:
diff changeset
2108 // above. Or another external suspend request could be waiting for us
a61af66fc99e Initial load
duke
parents:
diff changeset
2109 // by the time we return from SR_lock()->wait(). The thread
a61af66fc99e Initial load
duke
parents:
diff changeset
2110 // that requested the suspension may already be trying to walk our
a61af66fc99e Initial load
duke
parents:
diff changeset
2111 // stack and if we return now, we can change the stack out from under
a61af66fc99e Initial load
duke
parents:
diff changeset
2112 // it. This would be a "bad thing (TM)" and cause the stack walker
a61af66fc99e Initial load
duke
parents:
diff changeset
2113 // to crash. We stay self-suspended until there are no more pending
a61af66fc99e Initial load
duke
parents:
diff changeset
2114 // external suspend requests.
a61af66fc99e Initial load
duke
parents:
diff changeset
2115 while (is_external_suspend()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2116 ret++;
a61af66fc99e Initial load
duke
parents:
diff changeset
2117 this->set_ext_suspended();
a61af66fc99e Initial load
duke
parents:
diff changeset
2118
a61af66fc99e Initial load
duke
parents:
diff changeset
2119 // _ext_suspended flag is cleared by java_resume()
a61af66fc99e Initial load
duke
parents:
diff changeset
2120 while (is_ext_suspended()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2121 this->SR_lock()->wait(Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
2122 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2123 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2124
a61af66fc99e Initial load
duke
parents:
diff changeset
2125 return ret;
a61af66fc99e Initial load
duke
parents:
diff changeset
2126 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2127
a61af66fc99e Initial load
duke
parents:
diff changeset
2128 #ifdef ASSERT
a61af66fc99e Initial load
duke
parents:
diff changeset
2129 // verify the JavaThread has not yet been published in the Threads::list, and
a61af66fc99e Initial load
duke
parents:
diff changeset
2130 // hence doesn't need protection from concurrent access at this stage
a61af66fc99e Initial load
duke
parents:
diff changeset
2131 void JavaThread::verify_not_published() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2132 if (!Threads_lock->owned_by_self()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2133 MutexLockerEx ml(Threads_lock, Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
2134 assert( !Threads::includes(this),
a61af66fc99e Initial load
duke
parents:
diff changeset
2135 "java thread shouldn't have been published yet!");
a61af66fc99e Initial load
duke
parents:
diff changeset
2136 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2137 else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2138 assert( !Threads::includes(this),
a61af66fc99e Initial load
duke
parents:
diff changeset
2139 "java thread shouldn't have been published yet!");
a61af66fc99e Initial load
duke
parents:
diff changeset
2140 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2141 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2142 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
2143
a61af66fc99e Initial load
duke
parents:
diff changeset
2144 // Slow path when the native==>VM/Java barriers detect a safepoint is in
a61af66fc99e Initial load
duke
parents:
diff changeset
2145 // progress or when _suspend_flags is non-zero.
a61af66fc99e Initial load
duke
parents:
diff changeset
2146 // Current thread needs to self-suspend if there is a suspend request and/or
a61af66fc99e Initial load
duke
parents:
diff changeset
2147 // block if a safepoint is in progress.
a61af66fc99e Initial load
duke
parents:
diff changeset
2148 // Async exception ISN'T checked.
a61af66fc99e Initial load
duke
parents:
diff changeset
2149 // Note only the ThreadInVMfromNative transition can call this function
a61af66fc99e Initial load
duke
parents:
diff changeset
2150 // directly and when thread state is _thread_in_native_trans
a61af66fc99e Initial load
duke
parents:
diff changeset
2151 void JavaThread::check_safepoint_and_suspend_for_native_trans(JavaThread *thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2152 assert(thread->thread_state() == _thread_in_native_trans, "wrong state");
a61af66fc99e Initial load
duke
parents:
diff changeset
2153
a61af66fc99e Initial load
duke
parents:
diff changeset
2154 JavaThread *curJT = JavaThread::current();
a61af66fc99e Initial load
duke
parents:
diff changeset
2155 bool do_self_suspend = thread->is_external_suspend();
a61af66fc99e Initial load
duke
parents:
diff changeset
2156
a61af66fc99e Initial load
duke
parents:
diff changeset
2157 assert(!curJT->has_last_Java_frame() || curJT->frame_anchor()->walkable(), "Unwalkable stack in native->vm transition");
a61af66fc99e Initial load
duke
parents:
diff changeset
2158
a61af66fc99e Initial load
duke
parents:
diff changeset
2159 // If JNIEnv proxies are allowed, don't self-suspend if the target
a61af66fc99e Initial load
duke
parents:
diff changeset
2160 // thread is not the current thread. In older versions of jdbx, jdbx
a61af66fc99e Initial load
duke
parents:
diff changeset
2161 // threads could call into the VM with another thread's JNIEnv so we
a61af66fc99e Initial load
duke
parents:
diff changeset
2162 // can be here operating on behalf of a suspended thread (4432884).
a61af66fc99e Initial load
duke
parents:
diff changeset
2163 if (do_self_suspend && (!AllowJNIEnvProxy || curJT == thread)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2164 JavaThreadState state = thread->thread_state();
a61af66fc99e Initial load
duke
parents:
diff changeset
2165
a61af66fc99e Initial load
duke
parents:
diff changeset
2166 // We mark this thread_blocked state as a suspend-equivalent so
a61af66fc99e Initial load
duke
parents:
diff changeset
2167 // that a caller to is_ext_suspend_completed() won't be confused.
a61af66fc99e Initial load
duke
parents:
diff changeset
2168 // The suspend-equivalent state is cleared by java_suspend_self().
a61af66fc99e Initial load
duke
parents:
diff changeset
2169 thread->set_suspend_equivalent();
a61af66fc99e Initial load
duke
parents:
diff changeset
2170
a61af66fc99e Initial load
duke
parents:
diff changeset
2171 // If the safepoint code sees the _thread_in_native_trans state, it will
a61af66fc99e Initial load
duke
parents:
diff changeset
2172 // wait until the thread changes to other thread state. There is no
a61af66fc99e Initial load
duke
parents:
diff changeset
2173 // guarantee on how soon we can obtain the SR_lock and complete the
a61af66fc99e Initial load
duke
parents:
diff changeset
2174 // self-suspend request. It would be a bad idea to let safepoint wait for
a61af66fc99e Initial load
duke
parents:
diff changeset
2175 // too long. Temporarily change the state to _thread_blocked to
a61af66fc99e Initial load
duke
parents:
diff changeset
2176 // let the VM thread know that this thread is ready for GC. The problem
a61af66fc99e Initial load
duke
parents:
diff changeset
2177 // of changing thread state is that safepoint could happen just after
a61af66fc99e Initial load
duke
parents:
diff changeset
2178 // java_suspend_self() returns after being resumed, and VM thread will
a61af66fc99e Initial load
duke
parents:
diff changeset
2179 // see the _thread_blocked state. We must check for safepoint
a61af66fc99e Initial load
duke
parents:
diff changeset
2180 // after restoring the state and make sure we won't leave while a safepoint
a61af66fc99e Initial load
duke
parents:
diff changeset
2181 // is in progress.
a61af66fc99e Initial load
duke
parents:
diff changeset
2182 thread->set_thread_state(_thread_blocked);
a61af66fc99e Initial load
duke
parents:
diff changeset
2183 thread->java_suspend_self();
a61af66fc99e Initial load
duke
parents:
diff changeset
2184 thread->set_thread_state(state);
a61af66fc99e Initial load
duke
parents:
diff changeset
2185 // Make sure new state is seen by VM thread
a61af66fc99e Initial load
duke
parents:
diff changeset
2186 if (os::is_MP()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2187 if (UseMembar) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2188 // Force a fence between the write above and read below
a61af66fc99e Initial load
duke
parents:
diff changeset
2189 OrderAccess::fence();
a61af66fc99e Initial load
duke
parents:
diff changeset
2190 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2191 // Must use this rather than serialization page in particular on Windows
a61af66fc99e Initial load
duke
parents:
diff changeset
2192 InterfaceSupport::serialize_memory(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
2193 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2194 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2195 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2196
a61af66fc99e Initial load
duke
parents:
diff changeset
2197 if (SafepointSynchronize::do_call_back()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2198 // If we are safepointing, then block the caller which may not be
a61af66fc99e Initial load
duke
parents:
diff changeset
2199 // the same as the target thread (see above).
a61af66fc99e Initial load
duke
parents:
diff changeset
2200 SafepointSynchronize::block(curJT);
a61af66fc99e Initial load
duke
parents:
diff changeset
2201 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2202
a61af66fc99e Initial load
duke
parents:
diff changeset
2203 if (thread->is_deopt_suspend()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2204 thread->clear_deopt_suspend();
a61af66fc99e Initial load
duke
parents:
diff changeset
2205 RegisterMap map(thread, false);
a61af66fc99e Initial load
duke
parents:
diff changeset
2206 frame f = thread->last_frame();
a61af66fc99e Initial load
duke
parents:
diff changeset
2207 while ( f.id() != thread->must_deopt_id() && ! f.is_first_frame()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2208 f = f.sender(&map);
a61af66fc99e Initial load
duke
parents:
diff changeset
2209 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2210 if (f.id() == thread->must_deopt_id()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2211 thread->clear_must_deopt_id();
1727
da877bdc9000 6975006: assert(check.is_deoptimized_frame()) failed: missed deopt
never
parents: 1689
diff changeset
2212 f.deoptimize(thread);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2213 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2214 fatal("missed deoptimization!");
a61af66fc99e Initial load
duke
parents:
diff changeset
2215 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2216 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2217 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2218
a61af66fc99e Initial load
duke
parents:
diff changeset
2219 // Slow path when the native==>VM/Java barriers detect a safepoint is in
a61af66fc99e Initial load
duke
parents:
diff changeset
2220 // progress or when _suspend_flags is non-zero.
a61af66fc99e Initial load
duke
parents:
diff changeset
2221 // Current thread needs to self-suspend if there is a suspend request and/or
a61af66fc99e Initial load
duke
parents:
diff changeset
2222 // block if a safepoint is in progress.
a61af66fc99e Initial load
duke
parents:
diff changeset
2223 // Also check for pending async exception (not including unsafe access error).
a61af66fc99e Initial load
duke
parents:
diff changeset
2224 // Note only the native==>VM/Java barriers can call this function and when
a61af66fc99e Initial load
duke
parents:
diff changeset
2225 // thread state is _thread_in_native_trans.
a61af66fc99e Initial load
duke
parents:
diff changeset
2226 void JavaThread::check_special_condition_for_native_trans(JavaThread *thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2227 check_safepoint_and_suspend_for_native_trans(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
2228
a61af66fc99e Initial load
duke
parents:
diff changeset
2229 if (thread->has_async_exception()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2230 // We are in _thread_in_native_trans state, don't handle unsafe
a61af66fc99e Initial load
duke
parents:
diff changeset
2231 // access error since that may block.
a61af66fc99e Initial load
duke
parents:
diff changeset
2232 thread->check_and_handle_async_exceptions(false);
a61af66fc99e Initial load
duke
parents:
diff changeset
2233 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2234 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2235
a61af66fc99e Initial load
duke
parents:
diff changeset
2236 // We need to guarantee the Threads_lock here, since resumes are not
a61af66fc99e Initial load
duke
parents:
diff changeset
2237 // allowed during safepoint synchronization
a61af66fc99e Initial load
duke
parents:
diff changeset
2238 // Can only resume from an external suspension
a61af66fc99e Initial load
duke
parents:
diff changeset
2239 void JavaThread::java_resume() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2240 assert_locked_or_safepoint(Threads_lock);
a61af66fc99e Initial load
duke
parents:
diff changeset
2241
a61af66fc99e Initial load
duke
parents:
diff changeset
2242 // Sanity check: thread is gone, has started exiting or the thread
a61af66fc99e Initial load
duke
parents:
diff changeset
2243 // was not externally suspended.
a61af66fc99e Initial load
duke
parents:
diff changeset
2244 if (!Threads::includes(this) || is_exiting() || !is_external_suspend()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2245 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2246 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2247
a61af66fc99e Initial load
duke
parents:
diff changeset
2248 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
2249
a61af66fc99e Initial load
duke
parents:
diff changeset
2250 clear_external_suspend();
a61af66fc99e Initial load
duke
parents:
diff changeset
2251
a61af66fc99e Initial load
duke
parents:
diff changeset
2252 if (is_ext_suspended()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2253 clear_ext_suspended();
a61af66fc99e Initial load
duke
parents:
diff changeset
2254 SR_lock()->notify_all();
a61af66fc99e Initial load
duke
parents:
diff changeset
2255 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2256 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2257
a61af66fc99e Initial load
duke
parents:
diff changeset
2258 void JavaThread::create_stack_guard_pages() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2259 if (! os::uses_stack_guard_pages() || _stack_guard_state != stack_guard_unused) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2260 address low_addr = stack_base() - stack_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
2261 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
2262
a61af66fc99e Initial load
duke
parents:
diff changeset
2263 int allocate = os::allocate_stack_guard_pages();
a61af66fc99e Initial load
duke
parents:
diff changeset
2264 // warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len);
a61af66fc99e Initial load
duke
parents:
diff changeset
2265
1320
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1290
diff changeset
2266 if (allocate && !os::create_stack_guard_pages((char *) low_addr, len)) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2267 warning("Attempt to allocate stack guard pages failed.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2268 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2269 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2270
a61af66fc99e Initial load
duke
parents:
diff changeset
2271 if (os::guard_memory((char *) low_addr, len)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2272 _stack_guard_state = stack_guard_enabled;
a61af66fc99e Initial load
duke
parents:
diff changeset
2273 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2274 warning("Attempt to protect stack guard pages failed.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2275 if (os::uncommit_memory((char *) low_addr, len)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2276 warning("Attempt to deallocate stack guard pages failed.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2277 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2278 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2279 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2280
a61af66fc99e Initial load
duke
parents:
diff changeset
2281 void JavaThread::remove_stack_guard_pages() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2282 if (_stack_guard_state == stack_guard_unused) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2283 address low_addr = stack_base() - stack_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
2284 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
2285
a61af66fc99e Initial load
duke
parents:
diff changeset
2286 if (os::allocate_stack_guard_pages()) {
1320
3b3d12e645e7 6929067: Stack guard pages should be removed when thread is detached
coleenp
parents: 1290
diff changeset
2287 if (os::remove_stack_guard_pages((char *) low_addr, len)) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2288 _stack_guard_state = stack_guard_unused;
a61af66fc99e Initial load
duke
parents:
diff changeset
2289 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2290 warning("Attempt to deallocate stack guard pages failed.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2291 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2292 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2293 if (_stack_guard_state == stack_guard_unused) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2294 if (os::unguard_memory((char *) low_addr, len)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2295 _stack_guard_state = stack_guard_unused;
a61af66fc99e Initial load
duke
parents:
diff changeset
2296 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2297 warning("Attempt to unprotect stack guard pages failed.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2298 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2299 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2300 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2301
a61af66fc99e Initial load
duke
parents:
diff changeset
2302 void JavaThread::enable_stack_yellow_zone() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2303 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2304 assert(_stack_guard_state != stack_guard_enabled, "already enabled");
a61af66fc99e Initial load
duke
parents:
diff changeset
2305
a61af66fc99e Initial load
duke
parents:
diff changeset
2306 // The base notation is from the stacks point of view, growing downward.
a61af66fc99e Initial load
duke
parents:
diff changeset
2307 // We need to adjust it to work correctly with guard_memory()
a61af66fc99e Initial load
duke
parents:
diff changeset
2308 address base = stack_yellow_zone_base() - stack_yellow_zone_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
2309
a61af66fc99e Initial load
duke
parents:
diff changeset
2310 guarantee(base < stack_base(),"Error calculating stack yellow zone");
a61af66fc99e Initial load
duke
parents:
diff changeset
2311 guarantee(base < os::current_stack_pointer(),"Error calculating stack yellow zone");
a61af66fc99e Initial load
duke
parents:
diff changeset
2312
a61af66fc99e Initial load
duke
parents:
diff changeset
2313 if (os::guard_memory((char *) base, stack_yellow_zone_size())) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2314 _stack_guard_state = stack_guard_enabled;
a61af66fc99e Initial load
duke
parents:
diff changeset
2315 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2316 warning("Attempt to guard stack yellow zone failed.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2317 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2318 enable_register_stack_guard();
a61af66fc99e Initial load
duke
parents:
diff changeset
2319 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2320
a61af66fc99e Initial load
duke
parents:
diff changeset
2321 void JavaThread::disable_stack_yellow_zone() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2322 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2323 assert(_stack_guard_state != stack_guard_yellow_disabled, "already disabled");
a61af66fc99e Initial load
duke
parents:
diff changeset
2324
a61af66fc99e Initial load
duke
parents:
diff changeset
2325 // Simply return if called for a thread that does not use guard pages.
a61af66fc99e Initial load
duke
parents:
diff changeset
2326 if (_stack_guard_state == stack_guard_unused) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2327
a61af66fc99e Initial load
duke
parents:
diff changeset
2328 // The base notation is from the stacks point of view, growing downward.
a61af66fc99e Initial load
duke
parents:
diff changeset
2329 // We need to adjust it to work correctly with guard_memory()
a61af66fc99e Initial load
duke
parents:
diff changeset
2330 address base = stack_yellow_zone_base() - stack_yellow_zone_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
2331
a61af66fc99e Initial load
duke
parents:
diff changeset
2332 if (os::unguard_memory((char *)base, stack_yellow_zone_size())) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2333 _stack_guard_state = stack_guard_yellow_disabled;
a61af66fc99e Initial load
duke
parents:
diff changeset
2334 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2335 warning("Attempt to unguard stack yellow zone failed.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2336 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2337 disable_register_stack_guard();
a61af66fc99e Initial load
duke
parents:
diff changeset
2338 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2339
a61af66fc99e Initial load
duke
parents:
diff changeset
2340 void JavaThread::enable_stack_red_zone() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2341 // The base notation is from the stacks point of view, growing downward.
a61af66fc99e Initial load
duke
parents:
diff changeset
2342 // We need to adjust it to work correctly with guard_memory()
a61af66fc99e Initial load
duke
parents:
diff changeset
2343 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2344 address base = stack_red_zone_base() - stack_red_zone_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
2345
a61af66fc99e Initial load
duke
parents:
diff changeset
2346 guarantee(base < stack_base(),"Error calculating stack red zone");
a61af66fc99e Initial load
duke
parents:
diff changeset
2347 guarantee(base < os::current_stack_pointer(),"Error calculating stack red zone");
a61af66fc99e Initial load
duke
parents:
diff changeset
2348
a61af66fc99e Initial load
duke
parents:
diff changeset
2349 if(!os::guard_memory((char *) base, stack_red_zone_size())) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2350 warning("Attempt to guard stack red zone failed.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2351 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2352 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2353
a61af66fc99e Initial load
duke
parents:
diff changeset
2354 void JavaThread::disable_stack_red_zone() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2355 // The base notation is from the stacks point of view, growing downward.
a61af66fc99e Initial load
duke
parents:
diff changeset
2356 // We need to adjust it to work correctly with guard_memory()
a61af66fc99e Initial load
duke
parents:
diff changeset
2357 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2358 address base = stack_red_zone_base() - stack_red_zone_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
2359 if (!os::unguard_memory((char *)base, stack_red_zone_size())) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2360 warning("Attempt to unguard stack red zone failed.");
a61af66fc99e Initial load
duke
parents:
diff changeset
2361 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2362 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2363
a61af66fc99e Initial load
duke
parents:
diff changeset
2364 void JavaThread::frames_do(void f(frame*, const RegisterMap* map)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2365 // ignore is there is no stack
a61af66fc99e Initial load
duke
parents:
diff changeset
2366 if (!has_last_Java_frame()) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2367 // traverse the stack frames. Starts from top frame.
a61af66fc99e Initial load
duke
parents:
diff changeset
2368 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2369 frame* fr = fst.current();
a61af66fc99e Initial load
duke
parents:
diff changeset
2370 f(fr, fst.register_map());
a61af66fc99e Initial load
duke
parents:
diff changeset
2371 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2372 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2373
a61af66fc99e Initial load
duke
parents:
diff changeset
2374
a61af66fc99e Initial load
duke
parents:
diff changeset
2375 #ifndef PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
2376 // Deoptimization
a61af66fc99e Initial load
duke
parents:
diff changeset
2377 // Function for testing deoptimization
a61af66fc99e Initial load
duke
parents:
diff changeset
2378 void JavaThread::deoptimize() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2379 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass
a61af66fc99e Initial load
duke
parents:
diff changeset
2380 StackFrameStream fst(this, UseBiasedLocking);
a61af66fc99e Initial load
duke
parents:
diff changeset
2381 bool deopt = false; // Dump stack only if a deopt actually happens.
a61af66fc99e Initial load
duke
parents:
diff changeset
2382 bool only_at = strlen(DeoptimizeOnlyAt) > 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2383 // Iterate over all frames in the thread and deoptimize
a61af66fc99e Initial load
duke
parents:
diff changeset
2384 for(; !fst.is_done(); fst.next()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2385 if(fst.current()->can_be_deoptimized()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2386
a61af66fc99e Initial load
duke
parents:
diff changeset
2387 if (only_at) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2388 // Deoptimize only at particular bcis. DeoptimizeOnlyAt
a61af66fc99e Initial load
duke
parents:
diff changeset
2389 // consists of comma or carriage return separated numbers so
a61af66fc99e Initial load
duke
parents:
diff changeset
2390 // search for the current bci in that string.
a61af66fc99e Initial load
duke
parents:
diff changeset
2391 address pc = fst.current()->pc();
a61af66fc99e Initial load
duke
parents:
diff changeset
2392 nmethod* nm = (nmethod*) fst.current()->cb();
a61af66fc99e Initial load
duke
parents:
diff changeset
2393 ScopeDesc* sd = nm->scope_desc_at( pc);
a61af66fc99e Initial load
duke
parents:
diff changeset
2394 char buffer[8];
a61af66fc99e Initial load
duke
parents:
diff changeset
2395 jio_snprintf(buffer, sizeof(buffer), "%d", sd->bci());
a61af66fc99e Initial load
duke
parents:
diff changeset
2396 size_t len = strlen(buffer);
a61af66fc99e Initial load
duke
parents:
diff changeset
2397 const char * found = strstr(DeoptimizeOnlyAt, buffer);
a61af66fc99e Initial load
duke
parents:
diff changeset
2398 while (found != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2399 if ((found[len] == ',' || found[len] == '\n' || found[len] == '\0') &&
a61af66fc99e Initial load
duke
parents:
diff changeset
2400 (found == DeoptimizeOnlyAt || found[-1] == ',' || found[-1] == '\n')) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2401 // Check that the bci found is bracketed by terminators.
a61af66fc99e Initial load
duke
parents:
diff changeset
2402 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2403 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2404 found = strstr(found + 1, buffer);
a61af66fc99e Initial load
duke
parents:
diff changeset
2405 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2406 if (!found) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2407 continue;
a61af66fc99e Initial load
duke
parents:
diff changeset
2408 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2409 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2410
a61af66fc99e Initial load
duke
parents:
diff changeset
2411 if (DebugDeoptimization && !deopt) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2412 deopt = true; // One-time only print before deopt
a61af66fc99e Initial load
duke
parents:
diff changeset
2413 tty->print_cr("[BEFORE Deoptimization]");
a61af66fc99e Initial load
duke
parents:
diff changeset
2414 trace_frames();
a61af66fc99e Initial load
duke
parents:
diff changeset
2415 trace_stack();
a61af66fc99e Initial load
duke
parents:
diff changeset
2416 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2417 Deoptimization::deoptimize(this, *fst.current(), fst.register_map());
a61af66fc99e Initial load
duke
parents:
diff changeset
2418 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2419 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2420
a61af66fc99e Initial load
duke
parents:
diff changeset
2421 if (DebugDeoptimization && deopt) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2422 tty->print_cr("[AFTER Deoptimization]");
a61af66fc99e Initial load
duke
parents:
diff changeset
2423 trace_frames();
a61af66fc99e Initial load
duke
parents:
diff changeset
2424 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2425 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2426
a61af66fc99e Initial load
duke
parents:
diff changeset
2427
a61af66fc99e Initial load
duke
parents:
diff changeset
2428 // Make zombies
a61af66fc99e Initial load
duke
parents:
diff changeset
2429 void JavaThread::make_zombies() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2430 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2431 if (fst.current()->can_be_deoptimized()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2432 // it is a Java nmethod
a61af66fc99e Initial load
duke
parents:
diff changeset
2433 nmethod* nm = CodeCache::find_nmethod(fst.current()->pc());
a61af66fc99e Initial load
duke
parents:
diff changeset
2434 nm->make_not_entrant();
a61af66fc99e Initial load
duke
parents:
diff changeset
2435 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2436 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2437 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2438 #endif // PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
2439
a61af66fc99e Initial load
duke
parents:
diff changeset
2440
a61af66fc99e Initial load
duke
parents:
diff changeset
2441 void JavaThread::deoptimized_wrt_marked_nmethods() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2442 if (!has_last_Java_frame()) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2443 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass
a61af66fc99e Initial load
duke
parents:
diff changeset
2444 StackFrameStream fst(this, UseBiasedLocking);
a61af66fc99e Initial load
duke
parents:
diff changeset
2445 for(; !fst.is_done(); fst.next()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2446 if (fst.current()->should_be_deoptimized()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2447 Deoptimization::deoptimize(this, *fst.current(), fst.register_map());
a61af66fc99e Initial load
duke
parents:
diff changeset
2448 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2449 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2450 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2451
a61af66fc99e Initial load
duke
parents:
diff changeset
2452
a61af66fc99e Initial load
duke
parents:
diff changeset
2453 // GC support
a61af66fc99e Initial load
duke
parents:
diff changeset
2454 static void frame_gc_epilogue(frame* f, const RegisterMap* map) { f->gc_epilogue(); }
a61af66fc99e Initial load
duke
parents:
diff changeset
2455
a61af66fc99e Initial load
duke
parents:
diff changeset
2456 void JavaThread::gc_epilogue() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2457 frames_do(frame_gc_epilogue);
a61af66fc99e Initial load
duke
parents:
diff changeset
2458 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2459
a61af66fc99e Initial load
duke
parents:
diff changeset
2460
a61af66fc99e Initial load
duke
parents:
diff changeset
2461 static void frame_gc_prologue(frame* f, const RegisterMap* map) { f->gc_prologue(); }
a61af66fc99e Initial load
duke
parents:
diff changeset
2462
a61af66fc99e Initial load
duke
parents:
diff changeset
2463 void JavaThread::gc_prologue() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2464 frames_do(frame_gc_prologue);
a61af66fc99e Initial load
duke
parents:
diff changeset
2465 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2466
1119
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2467 // If the caller is a NamedThread, then remember, in the current scope,
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2468 // the given JavaThread in its _processed_thread field.
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2469 class RememberProcessedThread: public StackObj {
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2470 NamedThread* _cur_thr;
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2471 public:
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2472 RememberProcessedThread(JavaThread* jthr) {
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2473 Thread* thread = Thread::current();
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2474 if (thread->is_Named_thread()) {
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2475 _cur_thr = (NamedThread *)thread;
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2476 _cur_thr->set_processed_thread(jthr);
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2477 } else {
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2478 _cur_thr = NULL;
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2479 }
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2480 }
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2481
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2482 ~RememberProcessedThread() {
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2483 if (_cur_thr) {
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2484 _cur_thr->set_processed_thread(NULL);
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2485 }
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2486 }
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2487 };
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2488
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
2489 void JavaThread::oops_do(OopClosure* f, CodeBlobClosure* cf) {
1166
7b0e9cba0307 6896647: card marks can be deferred too long
ysr
parents: 1144
diff changeset
2490 // Verify that the deferred card marks have been flushed.
7b0e9cba0307 6896647: card marks can be deferred too long
ysr
parents: 1144
diff changeset
2491 assert(deferred_card_mark().is_empty(), "Should be empty during GC");
1027
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents: 997
diff changeset
2492
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2493 // The ThreadProfiler oops_do is done from FlatProfiler::oops_do
a61af66fc99e Initial load
duke
parents:
diff changeset
2494 // since there may be more than one thread using each ThreadProfiler.
a61af66fc99e Initial load
duke
parents:
diff changeset
2495
a61af66fc99e Initial load
duke
parents:
diff changeset
2496 // Traverse the GCHandles
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
2497 Thread::oops_do(f, cf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2498
a61af66fc99e Initial load
duke
parents:
diff changeset
2499 assert( (!has_last_Java_frame() && java_call_counter() == 0) ||
a61af66fc99e Initial load
duke
parents:
diff changeset
2500 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!");
a61af66fc99e Initial load
duke
parents:
diff changeset
2501
a61af66fc99e Initial load
duke
parents:
diff changeset
2502 if (has_last_Java_frame()) {
1119
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2503 // Record JavaThread to GC thread
547f81740344 6361589: Print out stack trace for target thread of GC crash
minqi
parents: 1115
diff changeset
2504 RememberProcessedThread rpt(this);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2505
a61af66fc99e Initial load
duke
parents:
diff changeset
2506 // Traverse the privileged stack
a61af66fc99e Initial load
duke
parents:
diff changeset
2507 if (_privileged_stack_top != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2508 _privileged_stack_top->oops_do(f);
a61af66fc99e Initial load
duke
parents:
diff changeset
2509 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2510
a61af66fc99e Initial load
duke
parents:
diff changeset
2511 // traverse the registered growable array
a61af66fc99e Initial load
duke
parents:
diff changeset
2512 if (_array_for_gc != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2513 for (int index = 0; index < _array_for_gc->length(); index++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2514 f->do_oop(_array_for_gc->adr_at(index));
a61af66fc99e Initial load
duke
parents:
diff changeset
2515 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2516 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2517
a61af66fc99e Initial load
duke
parents:
diff changeset
2518 // Traverse the monitor chunks
a61af66fc99e Initial load
duke
parents:
diff changeset
2519 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2520 chunk->oops_do(f);
a61af66fc99e Initial load
duke
parents:
diff changeset
2521 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2522
a61af66fc99e Initial load
duke
parents:
diff changeset
2523 // Traverse the execution stack
a61af66fc99e Initial load
duke
parents:
diff changeset
2524 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) {
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
2525 fst.current()->oops_do(f, cf, fst.register_map());
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2526 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2527 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2528
a61af66fc99e Initial load
duke
parents:
diff changeset
2529 // callee_target is never live across a gc point so NULL it here should
a61af66fc99e Initial load
duke
parents:
diff changeset
2530 // it still contain a methdOop.
a61af66fc99e Initial load
duke
parents:
diff changeset
2531
a61af66fc99e Initial load
duke
parents:
diff changeset
2532 set_callee_target(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
2533
a61af66fc99e Initial load
duke
parents:
diff changeset
2534 assert(vframe_array_head() == NULL, "deopt in progress at a safepoint!");
a61af66fc99e Initial load
duke
parents:
diff changeset
2535 // If we have deferred set_locals there might be oops waiting to be
a61af66fc99e Initial load
duke
parents:
diff changeset
2536 // written
a61af66fc99e Initial load
duke
parents:
diff changeset
2537 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = deferred_locals();
a61af66fc99e Initial load
duke
parents:
diff changeset
2538 if (list != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2539 for (int i = 0; i < list->length(); i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2540 list->at(i)->oops_do(f);
a61af66fc99e Initial load
duke
parents:
diff changeset
2541 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2542 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2543
a61af66fc99e Initial load
duke
parents:
diff changeset
2544 // Traverse instance variables at the end since the GC may be moving things
a61af66fc99e Initial load
duke
parents:
diff changeset
2545 // around using this function
a61af66fc99e Initial load
duke
parents:
diff changeset
2546 f->do_oop((oop*) &_threadObj);
a61af66fc99e Initial load
duke
parents:
diff changeset
2547 f->do_oop((oop*) &_vm_result);
a61af66fc99e Initial load
duke
parents:
diff changeset
2548 f->do_oop((oop*) &_vm_result_2);
a61af66fc99e Initial load
duke
parents:
diff changeset
2549 f->do_oop((oop*) &_exception_oop);
a61af66fc99e Initial load
duke
parents:
diff changeset
2550 f->do_oop((oop*) &_pending_async_exception);
a61af66fc99e Initial load
duke
parents:
diff changeset
2551
a61af66fc99e Initial load
duke
parents:
diff changeset
2552 if (jvmti_thread_state() != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2553 jvmti_thread_state()->oops_do(f);
a61af66fc99e Initial load
duke
parents:
diff changeset
2554 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2555 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2556
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
2557 void JavaThread::nmethods_do(CodeBlobClosure* cf) {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
2558 Thread::nmethods_do(cf); // (super method is a no-op)
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2559
a61af66fc99e Initial load
duke
parents:
diff changeset
2560 assert( (!has_last_Java_frame() && java_call_counter() == 0) ||
a61af66fc99e Initial load
duke
parents:
diff changeset
2561 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!");
a61af66fc99e Initial load
duke
parents:
diff changeset
2562
a61af66fc99e Initial load
duke
parents:
diff changeset
2563 if (has_last_Java_frame()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2564 // Traverse the execution stack
a61af66fc99e Initial load
duke
parents:
diff changeset
2565 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) {
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
2566 fst.current()->nmethods_do(cf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2567 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2568 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2569 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2570
a61af66fc99e Initial load
duke
parents:
diff changeset
2571 // Printing
a61af66fc99e Initial load
duke
parents:
diff changeset
2572 const char* _get_thread_state_name(JavaThreadState _thread_state) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2573 switch (_thread_state) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2574 case _thread_uninitialized: return "_thread_uninitialized";
a61af66fc99e Initial load
duke
parents:
diff changeset
2575 case _thread_new: return "_thread_new";
a61af66fc99e Initial load
duke
parents:
diff changeset
2576 case _thread_new_trans: return "_thread_new_trans";
a61af66fc99e Initial load
duke
parents:
diff changeset
2577 case _thread_in_native: return "_thread_in_native";
a61af66fc99e Initial load
duke
parents:
diff changeset
2578 case _thread_in_native_trans: return "_thread_in_native_trans";
a61af66fc99e Initial load
duke
parents:
diff changeset
2579 case _thread_in_vm: return "_thread_in_vm";
a61af66fc99e Initial load
duke
parents:
diff changeset
2580 case _thread_in_vm_trans: return "_thread_in_vm_trans";
a61af66fc99e Initial load
duke
parents:
diff changeset
2581 case _thread_in_Java: return "_thread_in_Java";
a61af66fc99e Initial load
duke
parents:
diff changeset
2582 case _thread_in_Java_trans: return "_thread_in_Java_trans";
a61af66fc99e Initial load
duke
parents:
diff changeset
2583 case _thread_blocked: return "_thread_blocked";
a61af66fc99e Initial load
duke
parents:
diff changeset
2584 case _thread_blocked_trans: return "_thread_blocked_trans";
a61af66fc99e Initial load
duke
parents:
diff changeset
2585 default: return "unknown thread state";
a61af66fc99e Initial load
duke
parents:
diff changeset
2586 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2587 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2588
a61af66fc99e Initial load
duke
parents:
diff changeset
2589 #ifndef PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
2590 void JavaThread::print_thread_state_on(outputStream *st) const {
a61af66fc99e Initial load
duke
parents:
diff changeset
2591 st->print_cr(" JavaThread state: %s", _get_thread_state_name(_thread_state));
a61af66fc99e Initial load
duke
parents:
diff changeset
2592 };
a61af66fc99e Initial load
duke
parents:
diff changeset
2593 void JavaThread::print_thread_state() const {
a61af66fc99e Initial load
duke
parents:
diff changeset
2594 print_thread_state_on(tty);
a61af66fc99e Initial load
duke
parents:
diff changeset
2595 };
a61af66fc99e Initial load
duke
parents:
diff changeset
2596 #endif // PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
2597
a61af66fc99e Initial load
duke
parents:
diff changeset
2598 // Called by Threads::print() for VM_PrintThreads operation
a61af66fc99e Initial load
duke
parents:
diff changeset
2599 void JavaThread::print_on(outputStream *st) const {
a61af66fc99e Initial load
duke
parents:
diff changeset
2600 st->print("\"%s\" ", get_thread_name());
a61af66fc99e Initial load
duke
parents:
diff changeset
2601 oop thread_oop = threadObj();
a61af66fc99e Initial load
duke
parents:
diff changeset
2602 if (thread_oop != NULL && java_lang_Thread::is_daemon(thread_oop)) st->print("daemon ");
a61af66fc99e Initial load
duke
parents:
diff changeset
2603 Thread::print_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
2604 // print guess for valid stack memory region (assume 4K pages); helps lock debugging
702
b9fba36710f2 6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents: 669
diff changeset
2605 st->print_cr("[" INTPTR_FORMAT "]", (intptr_t)last_Java_sp() & ~right_n_bits(12));
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2606 if (thread_oop != NULL && JDK_Version::is_gte_jdk15x_version()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2607 st->print_cr(" java.lang.Thread.State: %s", java_lang_Thread::thread_status_name(thread_oop));
a61af66fc99e Initial load
duke
parents:
diff changeset
2608 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2609 #ifndef PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
2610 print_thread_state_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
2611 _safepoint_state->print_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
2612 #endif // PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
2613 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2614
a61af66fc99e Initial load
duke
parents:
diff changeset
2615 // Called by fatal error handler. The difference between this and
a61af66fc99e Initial load
duke
parents:
diff changeset
2616 // JavaThread::print() is that we can't grab lock or allocate memory.
a61af66fc99e Initial load
duke
parents:
diff changeset
2617 void JavaThread::print_on_error(outputStream* st, char *buf, int buflen) const {
a61af66fc99e Initial load
duke
parents:
diff changeset
2618 st->print("JavaThread \"%s\"", get_thread_name_string(buf, buflen));
a61af66fc99e Initial load
duke
parents:
diff changeset
2619 oop thread_obj = threadObj();
a61af66fc99e Initial load
duke
parents:
diff changeset
2620 if (thread_obj != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2621 if (java_lang_Thread::is_daemon(thread_obj)) st->print(" daemon");
a61af66fc99e Initial load
duke
parents:
diff changeset
2622 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2623 st->print(" [");
a61af66fc99e Initial load
duke
parents:
diff changeset
2624 st->print("%s", _get_thread_state_name(_thread_state));
a61af66fc99e Initial load
duke
parents:
diff changeset
2625 if (osthread()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2626 st->print(", id=%d", osthread()->thread_id());
a61af66fc99e Initial load
duke
parents:
diff changeset
2627 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2628 st->print(", stack(" PTR_FORMAT "," PTR_FORMAT ")",
a61af66fc99e Initial load
duke
parents:
diff changeset
2629 _stack_base - _stack_size, _stack_base);
a61af66fc99e Initial load
duke
parents:
diff changeset
2630 st->print("]");
a61af66fc99e Initial load
duke
parents:
diff changeset
2631 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2632 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2633
a61af66fc99e Initial load
duke
parents:
diff changeset
2634 // Verification
a61af66fc99e Initial load
duke
parents:
diff changeset
2635
a61af66fc99e Initial load
duke
parents:
diff changeset
2636 static void frame_verify(frame* f, const RegisterMap *map) { f->verify(map); }
a61af66fc99e Initial load
duke
parents:
diff changeset
2637
a61af66fc99e Initial load
duke
parents:
diff changeset
2638 void JavaThread::verify() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2639 // Verify oops in the thread.
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
2640 oops_do(&VerifyOopClosure::verify_oop, NULL);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2641
a61af66fc99e Initial load
duke
parents:
diff changeset
2642 // Verify the stack frames.
a61af66fc99e Initial load
duke
parents:
diff changeset
2643 frames_do(frame_verify);
a61af66fc99e Initial load
duke
parents:
diff changeset
2644 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2645
a61af66fc99e Initial load
duke
parents:
diff changeset
2646 // CR 6300358 (sub-CR 2137150)
a61af66fc99e Initial load
duke
parents:
diff changeset
2647 // Most callers of this method assume that it can't return NULL but a
a61af66fc99e Initial load
duke
parents:
diff changeset
2648 // thread may not have a name whilst it is in the process of attaching to
a61af66fc99e Initial load
duke
parents:
diff changeset
2649 // the VM - see CR 6412693, and there are places where a JavaThread can be
a61af66fc99e Initial load
duke
parents:
diff changeset
2650 // seen prior to having it's threadObj set (eg JNI attaching threads and
a61af66fc99e Initial load
duke
parents:
diff changeset
2651 // if vm exit occurs during initialization). These cases can all be accounted
a61af66fc99e Initial load
duke
parents:
diff changeset
2652 // for such that this method never returns NULL.
a61af66fc99e Initial load
duke
parents:
diff changeset
2653 const char* JavaThread::get_thread_name() const {
a61af66fc99e Initial load
duke
parents:
diff changeset
2654 #ifdef ASSERT
a61af66fc99e Initial load
duke
parents:
diff changeset
2655 // early safepoints can hit while current thread does not yet have TLS
a61af66fc99e Initial load
duke
parents:
diff changeset
2656 if (!SafepointSynchronize::is_at_safepoint()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2657 Thread *cur = Thread::current();
a61af66fc99e Initial load
duke
parents:
diff changeset
2658 if (!(cur->is_Java_thread() && cur == this)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2659 // Current JavaThreads are allowed to get their own name without
a61af66fc99e Initial load
duke
parents:
diff changeset
2660 // the Threads_lock.
a61af66fc99e Initial load
duke
parents:
diff changeset
2661 assert_locked_or_safepoint(Threads_lock);
a61af66fc99e Initial load
duke
parents:
diff changeset
2662 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2663 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2664 #endif // ASSERT
a61af66fc99e Initial load
duke
parents:
diff changeset
2665 return get_thread_name_string();
a61af66fc99e Initial load
duke
parents:
diff changeset
2666 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2667
a61af66fc99e Initial load
duke
parents:
diff changeset
2668 // Returns a non-NULL representation of this thread's name, or a suitable
a61af66fc99e Initial load
duke
parents:
diff changeset
2669 // descriptive string if there is no set name
a61af66fc99e Initial load
duke
parents:
diff changeset
2670 const char* JavaThread::get_thread_name_string(char* buf, int buflen) const {
a61af66fc99e Initial load
duke
parents:
diff changeset
2671 const char* name_str;
a61af66fc99e Initial load
duke
parents:
diff changeset
2672 oop thread_obj = threadObj();
a61af66fc99e Initial load
duke
parents:
diff changeset
2673 if (thread_obj != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2674 typeArrayOop name = java_lang_Thread::name(thread_obj);
a61af66fc99e Initial load
duke
parents:
diff changeset
2675 if (name != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2676 if (buf == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2677 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
a61af66fc99e Initial load
duke
parents:
diff changeset
2678 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2679 else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2680 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length(), buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
2681 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2682 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2683 else if (is_attaching()) { // workaround for 6412693 - see 6404306
a61af66fc99e Initial load
duke
parents:
diff changeset
2684 name_str = "<no-name - thread is attaching>";
a61af66fc99e Initial load
duke
parents:
diff changeset
2685 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2686 else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2687 name_str = Thread::name();
a61af66fc99e Initial load
duke
parents:
diff changeset
2688 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2689 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2690 else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2691 name_str = Thread::name();
a61af66fc99e Initial load
duke
parents:
diff changeset
2692 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2693 assert(name_str != NULL, "unexpected NULL thread name");
a61af66fc99e Initial load
duke
parents:
diff changeset
2694 return name_str;
a61af66fc99e Initial load
duke
parents:
diff changeset
2695 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2696
a61af66fc99e Initial load
duke
parents:
diff changeset
2697
a61af66fc99e Initial load
duke
parents:
diff changeset
2698 const char* JavaThread::get_threadgroup_name() const {
a61af66fc99e Initial load
duke
parents:
diff changeset
2699 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);)
a61af66fc99e Initial load
duke
parents:
diff changeset
2700 oop thread_obj = threadObj();
a61af66fc99e Initial load
duke
parents:
diff changeset
2701 if (thread_obj != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2702 oop thread_group = java_lang_Thread::threadGroup(thread_obj);
a61af66fc99e Initial load
duke
parents:
diff changeset
2703 if (thread_group != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2704 typeArrayOop name = java_lang_ThreadGroup::name(thread_group);
a61af66fc99e Initial load
duke
parents:
diff changeset
2705 // ThreadGroup.name can be null
a61af66fc99e Initial load
duke
parents:
diff changeset
2706 if (name != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2707 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
a61af66fc99e Initial load
duke
parents:
diff changeset
2708 return str;
a61af66fc99e Initial load
duke
parents:
diff changeset
2709 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2710 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2711 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2712 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2713 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2714
a61af66fc99e Initial load
duke
parents:
diff changeset
2715 const char* JavaThread::get_parent_name() const {
a61af66fc99e Initial load
duke
parents:
diff changeset
2716 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);)
a61af66fc99e Initial load
duke
parents:
diff changeset
2717 oop thread_obj = threadObj();
a61af66fc99e Initial load
duke
parents:
diff changeset
2718 if (thread_obj != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2719 oop thread_group = java_lang_Thread::threadGroup(thread_obj);
a61af66fc99e Initial load
duke
parents:
diff changeset
2720 if (thread_group != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2721 oop parent = java_lang_ThreadGroup::parent(thread_group);
a61af66fc99e Initial load
duke
parents:
diff changeset
2722 if (parent != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2723 typeArrayOop name = java_lang_ThreadGroup::name(parent);
a61af66fc99e Initial load
duke
parents:
diff changeset
2724 // ThreadGroup.name can be null
a61af66fc99e Initial load
duke
parents:
diff changeset
2725 if (name != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2726 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
a61af66fc99e Initial load
duke
parents:
diff changeset
2727 return str;
a61af66fc99e Initial load
duke
parents:
diff changeset
2728 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2729 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2730 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2731 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2732 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2733 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2734
a61af66fc99e Initial load
duke
parents:
diff changeset
2735 ThreadPriority JavaThread::java_priority() const {
a61af66fc99e Initial load
duke
parents:
diff changeset
2736 oop thr_oop = threadObj();
a61af66fc99e Initial load
duke
parents:
diff changeset
2737 if (thr_oop == NULL) return NormPriority; // Bootstrapping
a61af66fc99e Initial load
duke
parents:
diff changeset
2738 ThreadPriority priority = java_lang_Thread::priority(thr_oop);
a61af66fc99e Initial load
duke
parents:
diff changeset
2739 assert(MinPriority <= priority && priority <= MaxPriority, "sanity check");
a61af66fc99e Initial load
duke
parents:
diff changeset
2740 return priority;
a61af66fc99e Initial load
duke
parents:
diff changeset
2741 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2742
a61af66fc99e Initial load
duke
parents:
diff changeset
2743 void JavaThread::prepare(jobject jni_thread, ThreadPriority prio) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2744
a61af66fc99e Initial load
duke
parents:
diff changeset
2745 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
a61af66fc99e Initial load
duke
parents:
diff changeset
2746 // Link Java Thread object <-> C++ Thread
a61af66fc99e Initial load
duke
parents:
diff changeset
2747
a61af66fc99e Initial load
duke
parents:
diff changeset
2748 // Get the C++ thread object (an oop) from the JNI handle (a jthread)
a61af66fc99e Initial load
duke
parents:
diff changeset
2749 // and put it into a new Handle. The Handle "thread_oop" can then
a61af66fc99e Initial load
duke
parents:
diff changeset
2750 // be used to pass the C++ thread object to other methods.
a61af66fc99e Initial load
duke
parents:
diff changeset
2751
a61af66fc99e Initial load
duke
parents:
diff changeset
2752 // Set the Java level thread object (jthread) field of the
a61af66fc99e Initial load
duke
parents:
diff changeset
2753 // new thread (a JavaThread *) to C++ thread object using the
a61af66fc99e Initial load
duke
parents:
diff changeset
2754 // "thread_oop" handle.
a61af66fc99e Initial load
duke
parents:
diff changeset
2755
a61af66fc99e Initial load
duke
parents:
diff changeset
2756 // Set the thread field (a JavaThread *) of the
a61af66fc99e Initial load
duke
parents:
diff changeset
2757 // oop representing the java_lang_Thread to the new thread (a JavaThread *).
a61af66fc99e Initial load
duke
parents:
diff changeset
2758
a61af66fc99e Initial load
duke
parents:
diff changeset
2759 Handle thread_oop(Thread::current(),
a61af66fc99e Initial load
duke
parents:
diff changeset
2760 JNIHandles::resolve_non_null(jni_thread));
a61af66fc99e Initial load
duke
parents:
diff changeset
2761 assert(instanceKlass::cast(thread_oop->klass())->is_linked(),
a61af66fc99e Initial load
duke
parents:
diff changeset
2762 "must be initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
2763 set_threadObj(thread_oop());
a61af66fc99e Initial load
duke
parents:
diff changeset
2764 java_lang_Thread::set_thread(thread_oop(), this);
a61af66fc99e Initial load
duke
parents:
diff changeset
2765
a61af66fc99e Initial load
duke
parents:
diff changeset
2766 if (prio == NoPriority) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2767 prio = java_lang_Thread::priority(thread_oop());
a61af66fc99e Initial load
duke
parents:
diff changeset
2768 assert(prio != NoPriority, "A valid priority should be present");
a61af66fc99e Initial load
duke
parents:
diff changeset
2769 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2770
a61af66fc99e Initial load
duke
parents:
diff changeset
2771 // Push the Java priority down to the native thread; needs Threads_lock
a61af66fc99e Initial load
duke
parents:
diff changeset
2772 Thread::set_priority(this, prio);
a61af66fc99e Initial load
duke
parents:
diff changeset
2773
a61af66fc99e Initial load
duke
parents:
diff changeset
2774 // Add the new thread to the Threads list and set it in motion.
a61af66fc99e Initial load
duke
parents:
diff changeset
2775 // We must have threads lock in order to call Threads::add.
a61af66fc99e Initial load
duke
parents:
diff changeset
2776 // It is crucial that we do not block before the thread is
a61af66fc99e Initial load
duke
parents:
diff changeset
2777 // added to the Threads list for if a GC happens, then the java_thread oop
a61af66fc99e Initial load
duke
parents:
diff changeset
2778 // will not be visited by GC.
a61af66fc99e Initial load
duke
parents:
diff changeset
2779 Threads::add(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
2780 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2781
a61af66fc99e Initial load
duke
parents:
diff changeset
2782 oop JavaThread::current_park_blocker() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2783 // Support for JSR-166 locks
a61af66fc99e Initial load
duke
parents:
diff changeset
2784 oop thread_oop = threadObj();
242
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 196
diff changeset
2785 if (thread_oop != NULL &&
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 196
diff changeset
2786 JDK_Version::current().supports_thread_park_blocker()) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2787 return java_lang_Thread::park_blocker(thread_oop);
a61af66fc99e Initial load
duke
parents:
diff changeset
2788 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2789 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2790 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2791
a61af66fc99e Initial load
duke
parents:
diff changeset
2792
a61af66fc99e Initial load
duke
parents:
diff changeset
2793 void JavaThread::print_stack_on(outputStream* st) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2794 if (!has_last_Java_frame()) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2795 ResourceMark rm;
a61af66fc99e Initial load
duke
parents:
diff changeset
2796 HandleMark hm;
a61af66fc99e Initial load
duke
parents:
diff changeset
2797
a61af66fc99e Initial load
duke
parents:
diff changeset
2798 RegisterMap reg_map(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
2799 vframe* start_vf = last_java_vframe(&reg_map);
a61af66fc99e Initial load
duke
parents:
diff changeset
2800 int count = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2801 for (vframe* f = start_vf; f; f = f->sender() ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2802 if (f->is_java_frame()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2803 javaVFrame* jvf = javaVFrame::cast(f);
a61af66fc99e Initial load
duke
parents:
diff changeset
2804 java_lang_Throwable::print_stack_element(st, jvf->method(), jvf->bci());
a61af66fc99e Initial load
duke
parents:
diff changeset
2805
a61af66fc99e Initial load
duke
parents:
diff changeset
2806 // Print out lock information
a61af66fc99e Initial load
duke
parents:
diff changeset
2807 if (JavaMonitorsInStackTrace) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2808 jvf->print_lock_info_on(st, count);
a61af66fc99e Initial load
duke
parents:
diff changeset
2809 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2810 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2811 // Ignore non-Java frames
a61af66fc99e Initial load
duke
parents:
diff changeset
2812 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2813
a61af66fc99e Initial load
duke
parents:
diff changeset
2814 // Bail-out case for too deep stacks
a61af66fc99e Initial load
duke
parents:
diff changeset
2815 count++;
a61af66fc99e Initial load
duke
parents:
diff changeset
2816 if (MaxJavaStackTraceDepth == count) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2817 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2818 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2819
a61af66fc99e Initial load
duke
parents:
diff changeset
2820
a61af66fc99e Initial load
duke
parents:
diff changeset
2821 // JVMTI PopFrame support
a61af66fc99e Initial load
duke
parents:
diff changeset
2822 void JavaThread::popframe_preserve_args(ByteSize size_in_bytes, void* start) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2823 assert(_popframe_preserved_args == NULL, "should not wipe out old PopFrame preserved arguments");
a61af66fc99e Initial load
duke
parents:
diff changeset
2824 if (in_bytes(size_in_bytes) != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2825 _popframe_preserved_args = NEW_C_HEAP_ARRAY(char, in_bytes(size_in_bytes));
a61af66fc99e Initial load
duke
parents:
diff changeset
2826 _popframe_preserved_args_size = in_bytes(size_in_bytes);
1603
d93949c5bdcc 6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents: 1584
diff changeset
2827 Copy::conjoint_jbytes(start, _popframe_preserved_args, _popframe_preserved_args_size);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2828 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2829 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2830
a61af66fc99e Initial load
duke
parents:
diff changeset
2831 void* JavaThread::popframe_preserved_args() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2832 return _popframe_preserved_args;
a61af66fc99e Initial load
duke
parents:
diff changeset
2833 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2834
a61af66fc99e Initial load
duke
parents:
diff changeset
2835 ByteSize JavaThread::popframe_preserved_args_size() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2836 return in_ByteSize(_popframe_preserved_args_size);
a61af66fc99e Initial load
duke
parents:
diff changeset
2837 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2838
a61af66fc99e Initial load
duke
parents:
diff changeset
2839 WordSize JavaThread::popframe_preserved_args_size_in_words() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2840 int sz = in_bytes(popframe_preserved_args_size());
a61af66fc99e Initial load
duke
parents:
diff changeset
2841 assert(sz % wordSize == 0, "argument size must be multiple of wordSize");
a61af66fc99e Initial load
duke
parents:
diff changeset
2842 return in_WordSize(sz / wordSize);
a61af66fc99e Initial load
duke
parents:
diff changeset
2843 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2844
a61af66fc99e Initial load
duke
parents:
diff changeset
2845 void JavaThread::popframe_free_preserved_args() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2846 assert(_popframe_preserved_args != NULL, "should not free PopFrame preserved arguments twice");
a61af66fc99e Initial load
duke
parents:
diff changeset
2847 FREE_C_HEAP_ARRAY(char, (char*) _popframe_preserved_args);
a61af66fc99e Initial load
duke
parents:
diff changeset
2848 _popframe_preserved_args = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2849 _popframe_preserved_args_size = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2850 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2851
a61af66fc99e Initial load
duke
parents:
diff changeset
2852 #ifndef PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
2853
a61af66fc99e Initial load
duke
parents:
diff changeset
2854 void JavaThread::trace_frames() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2855 tty->print_cr("[Describe stack]");
a61af66fc99e Initial load
duke
parents:
diff changeset
2856 int frame_no = 1;
a61af66fc99e Initial load
duke
parents:
diff changeset
2857 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2858 tty->print(" %d. ", frame_no++);
a61af66fc99e Initial load
duke
parents:
diff changeset
2859 fst.current()->print_value_on(tty,this);
a61af66fc99e Initial load
duke
parents:
diff changeset
2860 tty->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
2861 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2862 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2863
a61af66fc99e Initial load
duke
parents:
diff changeset
2864
a61af66fc99e Initial load
duke
parents:
diff changeset
2865 void JavaThread::trace_stack_from(vframe* start_vf) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2866 ResourceMark rm;
a61af66fc99e Initial load
duke
parents:
diff changeset
2867 int vframe_no = 1;
a61af66fc99e Initial load
duke
parents:
diff changeset
2868 for (vframe* f = start_vf; f; f = f->sender() ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2869 if (f->is_java_frame()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2870 javaVFrame::cast(f)->print_activation(vframe_no++);
a61af66fc99e Initial load
duke
parents:
diff changeset
2871 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
2872 f->print();
a61af66fc99e Initial load
duke
parents:
diff changeset
2873 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2874 if (vframe_no > StackPrintLimit) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2875 tty->print_cr("...<more frames>...");
a61af66fc99e Initial load
duke
parents:
diff changeset
2876 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2877 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2878 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2879 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2880
a61af66fc99e Initial load
duke
parents:
diff changeset
2881
a61af66fc99e Initial load
duke
parents:
diff changeset
2882 void JavaThread::trace_stack() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2883 if (!has_last_Java_frame()) return;
a61af66fc99e Initial load
duke
parents:
diff changeset
2884 ResourceMark rm;
a61af66fc99e Initial load
duke
parents:
diff changeset
2885 HandleMark hm;
a61af66fc99e Initial load
duke
parents:
diff changeset
2886 RegisterMap reg_map(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
2887 trace_stack_from(last_java_vframe(&reg_map));
a61af66fc99e Initial load
duke
parents:
diff changeset
2888 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2889
a61af66fc99e Initial load
duke
parents:
diff changeset
2890
a61af66fc99e Initial load
duke
parents:
diff changeset
2891 #endif // PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
2892
a61af66fc99e Initial load
duke
parents:
diff changeset
2893
a61af66fc99e Initial load
duke
parents:
diff changeset
2894 javaVFrame* JavaThread::last_java_vframe(RegisterMap *reg_map) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2895 assert(reg_map != NULL, "a map must be given");
a61af66fc99e Initial load
duke
parents:
diff changeset
2896 frame f = last_frame();
a61af66fc99e Initial load
duke
parents:
diff changeset
2897 for (vframe* vf = vframe::new_vframe(&f, reg_map, this); vf; vf = vf->sender() ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2898 if (vf->is_java_frame()) return javaVFrame::cast(vf);
a61af66fc99e Initial load
duke
parents:
diff changeset
2899 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2900 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2901 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2902
a61af66fc99e Initial load
duke
parents:
diff changeset
2903
a61af66fc99e Initial load
duke
parents:
diff changeset
2904 klassOop JavaThread::security_get_caller_class(int depth) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2905 vframeStream vfst(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
2906 vfst.security_get_caller_frame(depth);
a61af66fc99e Initial load
duke
parents:
diff changeset
2907 if (!vfst.at_end()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2908 return vfst.method()->method_holder();
a61af66fc99e Initial load
duke
parents:
diff changeset
2909 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2910 return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2911 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2912
a61af66fc99e Initial load
duke
parents:
diff changeset
2913 static void compiler_thread_entry(JavaThread* thread, TRAPS) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2914 assert(thread->is_Compiler_thread(), "must be compiler thread");
a61af66fc99e Initial load
duke
parents:
diff changeset
2915 CompileBroker::compiler_thread_loop();
a61af66fc99e Initial load
duke
parents:
diff changeset
2916 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2917
a61af66fc99e Initial load
duke
parents:
diff changeset
2918 // Create a CompilerThread
a61af66fc99e Initial load
duke
parents:
diff changeset
2919 CompilerThread::CompilerThread(CompileQueue* queue, CompilerCounters* counters)
a61af66fc99e Initial load
duke
parents:
diff changeset
2920 : JavaThread(&compiler_thread_entry) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2921 _env = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2922 _log = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2923 _task = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2924 _queue = queue;
a61af66fc99e Initial load
duke
parents:
diff changeset
2925 _counters = counters;
1584
b812ff5abc73 6958292: C1: Enable parallel compilation
iveresov
parents: 1552
diff changeset
2926 _buffer_blob = NULL;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2927
a61af66fc99e Initial load
duke
parents:
diff changeset
2928 #ifndef PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
2929 _ideal_graph_printer = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2930 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
2931 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2932
a61af66fc99e Initial load
duke
parents:
diff changeset
2933
a61af66fc99e Initial load
duke
parents:
diff changeset
2934 // ======= Threads ========
a61af66fc99e Initial load
duke
parents:
diff changeset
2935
a61af66fc99e Initial load
duke
parents:
diff changeset
2936 // The Threads class links together all active threads, and provides
a61af66fc99e Initial load
duke
parents:
diff changeset
2937 // operations over all threads. It is protected by its own Mutex
a61af66fc99e Initial load
duke
parents:
diff changeset
2938 // lock, which is also used in other contexts to protect thread
a61af66fc99e Initial load
duke
parents:
diff changeset
2939 // operations from having the thread being operated on from exiting
a61af66fc99e Initial load
duke
parents:
diff changeset
2940 // and going away unexpectedly (e.g., safepoint synchronization)
a61af66fc99e Initial load
duke
parents:
diff changeset
2941
a61af66fc99e Initial load
duke
parents:
diff changeset
2942 JavaThread* Threads::_thread_list = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
2943 int Threads::_number_of_threads = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2944 int Threads::_number_of_non_daemon_threads = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2945 int Threads::_return_code = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2946 size_t JavaThread::_stack_size_at_create = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
2947
a61af66fc99e Initial load
duke
parents:
diff changeset
2948 // All JavaThreads
a61af66fc99e Initial load
duke
parents:
diff changeset
2949 #define ALL_JAVA_THREADS(X) for (JavaThread* X = _thread_list; X; X = X->next())
a61af66fc99e Initial load
duke
parents:
diff changeset
2950
a61af66fc99e Initial load
duke
parents:
diff changeset
2951 void os_stream();
a61af66fc99e Initial load
duke
parents:
diff changeset
2952
a61af66fc99e Initial load
duke
parents:
diff changeset
2953 // All JavaThreads + all non-JavaThreads (i.e., every thread in the system)
a61af66fc99e Initial load
duke
parents:
diff changeset
2954 void Threads::threads_do(ThreadClosure* tc) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2955 assert_locked_or_safepoint(Threads_lock);
a61af66fc99e Initial load
duke
parents:
diff changeset
2956 // ALL_JAVA_THREADS iterates through all JavaThreads
a61af66fc99e Initial load
duke
parents:
diff changeset
2957 ALL_JAVA_THREADS(p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2958 tc->do_thread(p);
a61af66fc99e Initial load
duke
parents:
diff changeset
2959 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2960 // Someday we could have a table or list of all non-JavaThreads.
a61af66fc99e Initial load
duke
parents:
diff changeset
2961 // For now, just manually iterate through them.
a61af66fc99e Initial load
duke
parents:
diff changeset
2962 tc->do_thread(VMThread::vm_thread());
a61af66fc99e Initial load
duke
parents:
diff changeset
2963 Universe::heap()->gc_threads_do(tc);
323
b33eef719520 6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents: 286
diff changeset
2964 WatcherThread *wt = WatcherThread::watcher_thread();
b33eef719520 6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents: 286
diff changeset
2965 // Strictly speaking, the following NULL check isn't sufficient to make sure
b33eef719520 6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents: 286
diff changeset
2966 // the data for WatcherThread is still valid upon being examined. However,
b33eef719520 6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents: 286
diff changeset
2967 // considering that WatchThread terminates when the VM is on the way to
b33eef719520 6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents: 286
diff changeset
2968 // exit at safepoint, the chance of the above is extremely small. The right
b33eef719520 6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents: 286
diff changeset
2969 // way to prevent termination of WatcherThread would be to acquire
b33eef719520 6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents: 286
diff changeset
2970 // Terminator_lock, but we can't do that without violating the lock rank
b33eef719520 6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents: 286
diff changeset
2971 // checking in some cases.
b33eef719520 6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents: 286
diff changeset
2972 if (wt != NULL)
b33eef719520 6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents: 286
diff changeset
2973 tc->do_thread(wt);
b33eef719520 6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents: 286
diff changeset
2974
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2975 // If CompilerThreads ever become non-JavaThreads, add them here
a61af66fc99e Initial load
duke
parents:
diff changeset
2976 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2977
a61af66fc99e Initial load
duke
parents:
diff changeset
2978 jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2979
242
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 196
diff changeset
2980 extern void JDK_Version_init();
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 196
diff changeset
2981
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2982 // Check version
a61af66fc99e Initial load
duke
parents:
diff changeset
2983 if (!is_supported_jni_version(args->version)) return JNI_EVERSION;
a61af66fc99e Initial load
duke
parents:
diff changeset
2984
a61af66fc99e Initial load
duke
parents:
diff changeset
2985 // Initialize the output stream module
a61af66fc99e Initial load
duke
parents:
diff changeset
2986 ostream_init();
a61af66fc99e Initial load
duke
parents:
diff changeset
2987
a61af66fc99e Initial load
duke
parents:
diff changeset
2988 // Process java launcher properties.
a61af66fc99e Initial load
duke
parents:
diff changeset
2989 Arguments::process_sun_java_launcher_properties(args);
a61af66fc99e Initial load
duke
parents:
diff changeset
2990
a61af66fc99e Initial load
duke
parents:
diff changeset
2991 // Initialize the os module before using TLS
a61af66fc99e Initial load
duke
parents:
diff changeset
2992 os::init();
a61af66fc99e Initial load
duke
parents:
diff changeset
2993
a61af66fc99e Initial load
duke
parents:
diff changeset
2994 // Initialize system properties.
a61af66fc99e Initial load
duke
parents:
diff changeset
2995 Arguments::init_system_properties();
a61af66fc99e Initial load
duke
parents:
diff changeset
2996
242
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 196
diff changeset
2997 // So that JDK version can be used as a discrimintor when parsing arguments
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 196
diff changeset
2998 JDK_Version_init();
d95b224e9f17 6721093: -XX:AppendRatio=N not supported
kamg
parents: 196
diff changeset
2999
1864
dfb38ea7da17 6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents: 1731
diff changeset
3000 // Update/Initialize System properties after JDK version number is known
dfb38ea7da17 6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents: 1731
diff changeset
3001 Arguments::init_version_specific_system_properties();
dfb38ea7da17 6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents: 1731
diff changeset
3002
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3003 // Parse arguments
a61af66fc99e Initial load
duke
parents:
diff changeset
3004 jint parse_result = Arguments::parse(args);
a61af66fc99e Initial load
duke
parents:
diff changeset
3005 if (parse_result != JNI_OK) return parse_result;
a61af66fc99e Initial load
duke
parents:
diff changeset
3006
a61af66fc99e Initial load
duke
parents:
diff changeset
3007 if (PauseAtStartup) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3008 os::pause();
a61af66fc99e Initial load
duke
parents:
diff changeset
3009 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3010
a61af66fc99e Initial load
duke
parents:
diff changeset
3011 HS_DTRACE_PROBE(hotspot, vm__init__begin);
a61af66fc99e Initial load
duke
parents:
diff changeset
3012
a61af66fc99e Initial load
duke
parents:
diff changeset
3013 // Record VM creation timing statistics
a61af66fc99e Initial load
duke
parents:
diff changeset
3014 TraceVmCreationTime create_vm_timer;
a61af66fc99e Initial load
duke
parents:
diff changeset
3015 create_vm_timer.start();
a61af66fc99e Initial load
duke
parents:
diff changeset
3016
a61af66fc99e Initial load
duke
parents:
diff changeset
3017 // Timing (must come after argument parsing)
a61af66fc99e Initial load
duke
parents:
diff changeset
3018 TraceTime timer("Create VM", TraceStartupTime);
a61af66fc99e Initial load
duke
parents:
diff changeset
3019
a61af66fc99e Initial load
duke
parents:
diff changeset
3020 // Initialize the os module after parsing the args
a61af66fc99e Initial load
duke
parents:
diff changeset
3021 jint os_init_2_result = os::init_2();
a61af66fc99e Initial load
duke
parents:
diff changeset
3022 if (os_init_2_result != JNI_OK) return os_init_2_result;
a61af66fc99e Initial load
duke
parents:
diff changeset
3023
a61af66fc99e Initial load
duke
parents:
diff changeset
3024 // Initialize output stream logging
a61af66fc99e Initial load
duke
parents:
diff changeset
3025 ostream_init_log();
a61af66fc99e Initial load
duke
parents:
diff changeset
3026
a61af66fc99e Initial load
duke
parents:
diff changeset
3027 // Convert -Xrun to -agentlib: if there is no JVM_OnLoad
a61af66fc99e Initial load
duke
parents:
diff changeset
3028 // Must be before create_vm_init_agents()
a61af66fc99e Initial load
duke
parents:
diff changeset
3029 if (Arguments::init_libraries_at_startup()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3030 convert_vm_init_libraries_to_agents();
a61af66fc99e Initial load
duke
parents:
diff changeset
3031 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3032
a61af66fc99e Initial load
duke
parents:
diff changeset
3033 // Launch -agentlib/-agentpath and converted -Xrun agents
a61af66fc99e Initial load
duke
parents:
diff changeset
3034 if (Arguments::init_agents_at_startup()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3035 create_vm_init_agents();
a61af66fc99e Initial load
duke
parents:
diff changeset
3036 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3037
a61af66fc99e Initial load
duke
parents:
diff changeset
3038 // Initialize Threads state
a61af66fc99e Initial load
duke
parents:
diff changeset
3039 _thread_list = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3040 _number_of_threads = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
3041 _number_of_non_daemon_threads = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
3042
a61af66fc99e Initial load
duke
parents:
diff changeset
3043 // Initialize TLS
a61af66fc99e Initial load
duke
parents:
diff changeset
3044 ThreadLocalStorage::init();
a61af66fc99e Initial load
duke
parents:
diff changeset
3045
a61af66fc99e Initial load
duke
parents:
diff changeset
3046 // Initialize global data structures and create system classes in heap
a61af66fc99e Initial load
duke
parents:
diff changeset
3047 vm_init_globals();
a61af66fc99e Initial load
duke
parents:
diff changeset
3048
a61af66fc99e Initial load
duke
parents:
diff changeset
3049 // Attach the main thread to this os thread
a61af66fc99e Initial load
duke
parents:
diff changeset
3050 JavaThread* main_thread = new JavaThread();
a61af66fc99e Initial load
duke
parents:
diff changeset
3051 main_thread->set_thread_state(_thread_in_vm);
a61af66fc99e Initial load
duke
parents:
diff changeset
3052 // must do this before set_active_handles and initialize_thread_local_storage
a61af66fc99e Initial load
duke
parents:
diff changeset
3053 // Note: on solaris initialize_thread_local_storage() will (indirectly)
a61af66fc99e Initial load
duke
parents:
diff changeset
3054 // change the stack size recorded here to one based on the java thread
a61af66fc99e Initial load
duke
parents:
diff changeset
3055 // stacksize. This adjusted size is what is used to figure the placement
a61af66fc99e Initial load
duke
parents:
diff changeset
3056 // of the guard pages.
a61af66fc99e Initial load
duke
parents:
diff changeset
3057 main_thread->record_stack_base_and_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
3058 main_thread->initialize_thread_local_storage();
a61af66fc99e Initial load
duke
parents:
diff changeset
3059
a61af66fc99e Initial load
duke
parents:
diff changeset
3060 main_thread->set_active_handles(JNIHandleBlock::allocate_block());
a61af66fc99e Initial load
duke
parents:
diff changeset
3061
a61af66fc99e Initial load
duke
parents:
diff changeset
3062 if (!main_thread->set_as_starting_thread()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3063 vm_shutdown_during_initialization(
a61af66fc99e Initial load
duke
parents:
diff changeset
3064 "Failed necessary internal allocation. Out of swap space");
a61af66fc99e Initial load
duke
parents:
diff changeset
3065 delete main_thread;
a61af66fc99e Initial load
duke
parents:
diff changeset
3066 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again
a61af66fc99e Initial load
duke
parents:
diff changeset
3067 return JNI_ENOMEM;
a61af66fc99e Initial load
duke
parents:
diff changeset
3068 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3069
a61af66fc99e Initial load
duke
parents:
diff changeset
3070 // Enable guard page *after* os::create_main_thread(), otherwise it would
a61af66fc99e Initial load
duke
parents:
diff changeset
3071 // crash Linux VM, see notes in os_linux.cpp.
a61af66fc99e Initial load
duke
parents:
diff changeset
3072 main_thread->create_stack_guard_pages();
a61af66fc99e Initial load
duke
parents:
diff changeset
3073
1878
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
3074 // Initialize Java-Level synchronization subsystem
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
3075 ObjectMonitor::Initialize() ;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3076
a61af66fc99e Initial load
duke
parents:
diff changeset
3077 // Initialize global modules
a61af66fc99e Initial load
duke
parents:
diff changeset
3078 jint status = init_globals();
a61af66fc99e Initial load
duke
parents:
diff changeset
3079 if (status != JNI_OK) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3080 delete main_thread;
a61af66fc99e Initial load
duke
parents:
diff changeset
3081 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again
a61af66fc99e Initial load
duke
parents:
diff changeset
3082 return status;
a61af66fc99e Initial load
duke
parents:
diff changeset
3083 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3084
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
3085 // Should be done after the heap is fully created
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
3086 main_thread->cache_global_variables();
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
3087
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3088 HandleMark hm;
a61af66fc99e Initial load
duke
parents:
diff changeset
3089
a61af66fc99e Initial load
duke
parents:
diff changeset
3090 { MutexLocker mu(Threads_lock);
a61af66fc99e Initial load
duke
parents:
diff changeset
3091 Threads::add(main_thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
3092 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3093
a61af66fc99e Initial load
duke
parents:
diff changeset
3094 // Any JVMTI raw monitors entered in onload will transition into
a61af66fc99e Initial load
duke
parents:
diff changeset
3095 // real raw monitor. VM is setup enough here for raw monitor enter.
a61af66fc99e Initial load
duke
parents:
diff changeset
3096 JvmtiExport::transition_pending_onload_raw_monitors();
a61af66fc99e Initial load
duke
parents:
diff changeset
3097
a61af66fc99e Initial load
duke
parents:
diff changeset
3098 if (VerifyBeforeGC &&
a61af66fc99e Initial load
duke
parents:
diff changeset
3099 Universe::heap()->total_collections() >= VerifyGCStartAt) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3100 Universe::heap()->prepare_for_verify();
a61af66fc99e Initial load
duke
parents:
diff changeset
3101 Universe::verify(); // make sure we're starting with a clean slate
a61af66fc99e Initial load
duke
parents:
diff changeset
3102 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3103
a61af66fc99e Initial load
duke
parents:
diff changeset
3104 // Create the VMThread
a61af66fc99e Initial load
duke
parents:
diff changeset
3105 { TraceTime timer("Start VMThread", TraceStartupTime);
a61af66fc99e Initial load
duke
parents:
diff changeset
3106 VMThread::create();
a61af66fc99e Initial load
duke
parents:
diff changeset
3107 Thread* vmthread = VMThread::vm_thread();
a61af66fc99e Initial load
duke
parents:
diff changeset
3108
a61af66fc99e Initial load
duke
parents:
diff changeset
3109 if (!os::create_thread(vmthread, os::vm_thread))
a61af66fc99e Initial load
duke
parents:
diff changeset
3110 vm_exit_during_initialization("Cannot create VM thread. Out of system resources.");
a61af66fc99e Initial load
duke
parents:
diff changeset
3111
a61af66fc99e Initial load
duke
parents:
diff changeset
3112 // Wait for the VM thread to become ready, and VMThread::run to initialize
a61af66fc99e Initial load
duke
parents:
diff changeset
3113 // Monitors can have spurious returns, must always check another state flag
a61af66fc99e Initial load
duke
parents:
diff changeset
3114 {
a61af66fc99e Initial load
duke
parents:
diff changeset
3115 MutexLocker ml(Notify_lock);
a61af66fc99e Initial load
duke
parents:
diff changeset
3116 os::start_thread(vmthread);
a61af66fc99e Initial load
duke
parents:
diff changeset
3117 while (vmthread->active_handles() == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3118 Notify_lock->wait();
a61af66fc99e Initial load
duke
parents:
diff changeset
3119 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3120 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3121 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3122
a61af66fc99e Initial load
duke
parents:
diff changeset
3123 assert (Universe::is_fully_initialized(), "not initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
3124 EXCEPTION_MARK;
a61af66fc99e Initial load
duke
parents:
diff changeset
3125
a61af66fc99e Initial load
duke
parents:
diff changeset
3126 // At this point, the Universe is initialized, but we have not executed
a61af66fc99e Initial load
duke
parents:
diff changeset
3127 // any byte code. Now is a good time (the only time) to dump out the
a61af66fc99e Initial load
duke
parents:
diff changeset
3128 // internal state of the JVM for sharing.
a61af66fc99e Initial load
duke
parents:
diff changeset
3129
a61af66fc99e Initial load
duke
parents:
diff changeset
3130 if (DumpSharedSpaces) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3131 Universe::heap()->preload_and_dump(CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3132 ShouldNotReachHere();
a61af66fc99e Initial load
duke
parents:
diff changeset
3133 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3134
a61af66fc99e Initial load
duke
parents:
diff changeset
3135 // Always call even when there are not JVMTI environments yet, since environments
a61af66fc99e Initial load
duke
parents:
diff changeset
3136 // may be attached late and JVMTI must track phases of VM execution
a61af66fc99e Initial load
duke
parents:
diff changeset
3137 JvmtiExport::enter_start_phase();
a61af66fc99e Initial load
duke
parents:
diff changeset
3138
a61af66fc99e Initial load
duke
parents:
diff changeset
3139 // Notify JVMTI agents that VM has started (JNI is up) - nop if no agents.
a61af66fc99e Initial load
duke
parents:
diff changeset
3140 JvmtiExport::post_vm_start();
a61af66fc99e Initial load
duke
parents:
diff changeset
3141
a61af66fc99e Initial load
duke
parents:
diff changeset
3142 {
a61af66fc99e Initial load
duke
parents:
diff changeset
3143 TraceTime timer("Initialize java.lang classes", TraceStartupTime);
a61af66fc99e Initial load
duke
parents:
diff changeset
3144
a61af66fc99e Initial load
duke
parents:
diff changeset
3145 if (EagerXrunInit && Arguments::init_libraries_at_startup()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3146 create_vm_init_libraries();
a61af66fc99e Initial load
duke
parents:
diff changeset
3147 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3148
a61af66fc99e Initial load
duke
parents:
diff changeset
3149 if (InitializeJavaLangString) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3150 initialize_class(vmSymbolHandles::java_lang_String(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3151 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3152 warning("java.lang.String not initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
3153 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3154
18
c7d713375c94 6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents: 0
diff changeset
3155 if (AggressiveOpts) {
192
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3156 {
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3157 // Forcibly initialize java/util/HashMap and mutate the private
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3158 // static final "frontCacheEnabled" field before we start creating instances
18
c7d713375c94 6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents: 0
diff changeset
3159 #ifdef ASSERT
192
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3160 klassOop tmp_k = SystemDictionary::find(vmSymbolHandles::java_util_HashMap(), Handle(), Handle(), CHECK_0);
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3161 assert(tmp_k == NULL, "java/util/HashMap should not be loaded yet");
18
c7d713375c94 6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents: 0
diff changeset
3162 #endif
192
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3163 klassOop k_o = SystemDictionary::resolve_or_null(vmSymbolHandles::java_util_HashMap(), Handle(), Handle(), CHECK_0);
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3164 KlassHandle k = KlassHandle(THREAD, k_o);
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3165 guarantee(k.not_null(), "Must find java/util/HashMap");
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3166 instanceKlassHandle ik = instanceKlassHandle(THREAD, k());
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3167 ik->initialize(CHECK_0);
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3168 fieldDescriptor fd;
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3169 // Possible we might not find this field; if so, don't break
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3170 if (ik->find_local_field(vmSymbols::frontCacheEnabled_name(), vmSymbols::bool_signature(), &fd)) {
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3171 k()->bool_field_put(fd.offset(), true);
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3172 }
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3173 }
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3174
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3175 if (UseStringCache) {
669
eca19a8425b5 6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents: 441
diff changeset
3176 // Forcibly initialize java/lang/StringValue and mutate the private
192
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3177 // static final "stringCacheEnabled" field before we start creating instances
669
eca19a8425b5 6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents: 441
diff changeset
3178 klassOop k_o = SystemDictionary::resolve_or_null(vmSymbolHandles::java_lang_StringValue(), Handle(), Handle(), CHECK_0);
eca19a8425b5 6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents: 441
diff changeset
3179 // Possible that StringValue isn't present: if so, silently don't break
eca19a8425b5 6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents: 441
diff changeset
3180 if (k_o != NULL) {
eca19a8425b5 6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents: 441
diff changeset
3181 KlassHandle k = KlassHandle(THREAD, k_o);
eca19a8425b5 6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents: 441
diff changeset
3182 instanceKlassHandle ik = instanceKlassHandle(THREAD, k());
eca19a8425b5 6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents: 441
diff changeset
3183 ik->initialize(CHECK_0);
eca19a8425b5 6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents: 441
diff changeset
3184 fieldDescriptor fd;
eca19a8425b5 6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents: 441
diff changeset
3185 // Possible we might not find this field: if so, silently don't break
eca19a8425b5 6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents: 441
diff changeset
3186 if (ik->find_local_field(vmSymbols::stringCacheEnabled_name(), vmSymbols::bool_signature(), &fd)) {
eca19a8425b5 6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents: 441
diff changeset
3187 k()->bool_field_put(fd.offset(), true);
eca19a8425b5 6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents: 441
diff changeset
3188 }
192
6d13fcb3663f 6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents: 62
diff changeset
3189 }
18
c7d713375c94 6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents: 0
diff changeset
3190 }
c7d713375c94 6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents: 0
diff changeset
3191 }
c7d713375c94 6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents: 0
diff changeset
3192
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3193 // Initialize java_lang.System (needed before creating the thread)
a61af66fc99e Initial load
duke
parents:
diff changeset
3194 if (InitializeJavaLangSystem) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3195 initialize_class(vmSymbolHandles::java_lang_System(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3196 initialize_class(vmSymbolHandles::java_lang_ThreadGroup(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3197 Handle thread_group = create_initial_thread_group(CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3198 Universe::set_main_thread_group(thread_group());
a61af66fc99e Initial load
duke
parents:
diff changeset
3199 initialize_class(vmSymbolHandles::java_lang_Thread(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3200 oop thread_object = create_initial_thread(thread_group, main_thread, CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3201 main_thread->set_threadObj(thread_object);
a61af66fc99e Initial load
duke
parents:
diff changeset
3202 // Set thread status to running since main thread has
a61af66fc99e Initial load
duke
parents:
diff changeset
3203 // been started and running.
a61af66fc99e Initial load
duke
parents:
diff changeset
3204 java_lang_Thread::set_thread_status(thread_object,
a61af66fc99e Initial load
duke
parents:
diff changeset
3205 java_lang_Thread::RUNNABLE);
a61af66fc99e Initial load
duke
parents:
diff changeset
3206
a61af66fc99e Initial load
duke
parents:
diff changeset
3207 // The VM preresolve methods to these classes. Make sure that get initialized
a61af66fc99e Initial load
duke
parents:
diff changeset
3208 initialize_class(vmSymbolHandles::java_lang_reflect_Method(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3209 initialize_class(vmSymbolHandles::java_lang_ref_Finalizer(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3210 // The VM creates & returns objects of this class. Make sure it's initialized.
a61af66fc99e Initial load
duke
parents:
diff changeset
3211 initialize_class(vmSymbolHandles::java_lang_Class(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3212 call_initializeSystemClass(CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3213 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3214 warning("java.lang.System not initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
3215 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3216
a61af66fc99e Initial load
duke
parents:
diff changeset
3217 // an instance of OutOfMemory exception has been allocated earlier
a61af66fc99e Initial load
duke
parents:
diff changeset
3218 if (InitializeJavaLangExceptionsErrors) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3219 initialize_class(vmSymbolHandles::java_lang_OutOfMemoryError(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3220 initialize_class(vmSymbolHandles::java_lang_NullPointerException(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3221 initialize_class(vmSymbolHandles::java_lang_ClassCastException(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3222 initialize_class(vmSymbolHandles::java_lang_ArrayStoreException(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3223 initialize_class(vmSymbolHandles::java_lang_ArithmeticException(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3224 initialize_class(vmSymbolHandles::java_lang_StackOverflowError(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3225 initialize_class(vmSymbolHandles::java_lang_IllegalMonitorStateException(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3226 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3227 warning("java.lang.OutOfMemoryError has not been initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
3228 warning("java.lang.NullPointerException has not been initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
3229 warning("java.lang.ClassCastException has not been initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
3230 warning("java.lang.ArrayStoreException has not been initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
3231 warning("java.lang.ArithmeticException has not been initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
3232 warning("java.lang.StackOverflowError has not been initialized");
a61af66fc99e Initial load
duke
parents:
diff changeset
3233 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3234 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3235
a61af66fc99e Initial load
duke
parents:
diff changeset
3236 // See : bugid 4211085.
a61af66fc99e Initial load
duke
parents:
diff changeset
3237 // Background : the static initializer of java.lang.Compiler tries to read
a61af66fc99e Initial load
duke
parents:
diff changeset
3238 // property"java.compiler" and read & write property "java.vm.info".
a61af66fc99e Initial load
duke
parents:
diff changeset
3239 // When a security manager is installed through the command line
a61af66fc99e Initial load
duke
parents:
diff changeset
3240 // option "-Djava.security.manager", the above properties are not
a61af66fc99e Initial load
duke
parents:
diff changeset
3241 // readable and the static initializer for java.lang.Compiler fails
a61af66fc99e Initial load
duke
parents:
diff changeset
3242 // resulting in a NoClassDefFoundError. This can happen in any
a61af66fc99e Initial load
duke
parents:
diff changeset
3243 // user code which calls methods in java.lang.Compiler.
a61af66fc99e Initial load
duke
parents:
diff changeset
3244 // Hack : the hack is to pre-load and initialize this class, so that only
a61af66fc99e Initial load
duke
parents:
diff changeset
3245 // system domains are on the stack when the properties are read.
a61af66fc99e Initial load
duke
parents:
diff changeset
3246 // Currently even the AWT code has calls to methods in java.lang.Compiler.
a61af66fc99e Initial load
duke
parents:
diff changeset
3247 // On the classic VM, java.lang.Compiler is loaded very early to load the JIT.
a61af66fc99e Initial load
duke
parents:
diff changeset
3248 // Future Fix : the best fix is to grant everyone permissions to read "java.compiler" and
a61af66fc99e Initial load
duke
parents:
diff changeset
3249 // read and write"java.vm.info" in the default policy file. See bugid 4211383
a61af66fc99e Initial load
duke
parents:
diff changeset
3250 // Once that is done, we should remove this hack.
a61af66fc99e Initial load
duke
parents:
diff changeset
3251 initialize_class(vmSymbolHandles::java_lang_Compiler(), CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3252
a61af66fc99e Initial load
duke
parents:
diff changeset
3253 // More hackery - the static initializer of java.lang.Compiler adds the string "nojit" to
a61af66fc99e Initial load
duke
parents:
diff changeset
3254 // the java.vm.info property if no jit gets loaded through java.lang.Compiler (the hotspot
a61af66fc99e Initial load
duke
parents:
diff changeset
3255 // compiler does not get loaded through java.lang.Compiler). "java -version" with the
a61af66fc99e Initial load
duke
parents:
diff changeset
3256 // hotspot vm says "nojit" all the time which is confusing. So, we reset it here.
a61af66fc99e Initial load
duke
parents:
diff changeset
3257 // This should also be taken out as soon as 4211383 gets fixed.
a61af66fc99e Initial load
duke
parents:
diff changeset
3258 reset_vm_info_property(CHECK_0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3259
a61af66fc99e Initial load
duke
parents:
diff changeset
3260 quicken_jni_functions();
a61af66fc99e Initial load
duke
parents:
diff changeset
3261
a61af66fc99e Initial load
duke
parents:
diff changeset
3262 // Set flag that basic initialization has completed. Used by exceptions and various
a61af66fc99e Initial load
duke
parents:
diff changeset
3263 // debug stuff, that does not work until all basic classes have been initialized.
a61af66fc99e Initial load
duke
parents:
diff changeset
3264 set_init_completed();
a61af66fc99e Initial load
duke
parents:
diff changeset
3265
a61af66fc99e Initial load
duke
parents:
diff changeset
3266 HS_DTRACE_PROBE(hotspot, vm__init__end);
a61af66fc99e Initial load
duke
parents:
diff changeset
3267
a61af66fc99e Initial load
duke
parents:
diff changeset
3268 // record VM initialization completion time
a61af66fc99e Initial load
duke
parents:
diff changeset
3269 Management::record_vm_init_completed();
a61af66fc99e Initial load
duke
parents:
diff changeset
3270
a61af66fc99e Initial load
duke
parents:
diff changeset
3271 // Compute system loader. Note that this has to occur after set_init_completed, since
a61af66fc99e Initial load
duke
parents:
diff changeset
3272 // valid exceptions may be thrown in the process.
a61af66fc99e Initial load
duke
parents:
diff changeset
3273 // Note that we do not use CHECK_0 here since we are inside an EXCEPTION_MARK and
a61af66fc99e Initial load
duke
parents:
diff changeset
3274 // set_init_completed has just been called, causing exceptions not to be shortcut
a61af66fc99e Initial load
duke
parents:
diff changeset
3275 // anymore. We call vm_exit_during_initialization directly instead.
a61af66fc99e Initial load
duke
parents:
diff changeset
3276 SystemDictionary::compute_java_system_loader(THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
3277 if (HAS_PENDING_EXCEPTION) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3278 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
a61af66fc99e Initial load
duke
parents:
diff changeset
3279 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3280
1115
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
3281 #ifdef KERNEL
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
3282 if (JDK_Version::is_gte_jdk17x_version()) {
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
3283 set_jkernel_boot_classloader_hook(THREAD);
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
3284 }
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
3285 #endif // KERNEL
4b966d9946a3 6888880: JKernel VM to inject the sun.jkernel.DownloadManager as a boot classloader hook
mchung
parents: 1027
diff changeset
3286
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3287 #ifndef SERIALGC
a61af66fc99e Initial load
duke
parents:
diff changeset
3288 // Support for ConcurrentMarkSweep. This should be cleaned up
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
3289 // and better encapsulated. The ugly nested if test would go away
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
3290 // once things are properly refactored. XXX YSR
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
3291 if (UseConcMarkSweepGC || UseG1GC) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
3292 if (UseConcMarkSweepGC) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
3293 ConcurrentMarkSweepThread::makeSurrogateLockerThread(THREAD);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
3294 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
3295 ConcurrentMarkThread::makeSurrogateLockerThread(THREAD);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 62
diff changeset
3296 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3297 if (HAS_PENDING_EXCEPTION) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3298 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
a61af66fc99e Initial load
duke
parents:
diff changeset
3299 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3300 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3301 #endif // SERIALGC
a61af66fc99e Initial load
duke
parents:
diff changeset
3302
a61af66fc99e Initial load
duke
parents:
diff changeset
3303 // Always call even when there are not JVMTI environments yet, since environments
a61af66fc99e Initial load
duke
parents:
diff changeset
3304 // may be attached late and JVMTI must track phases of VM execution
a61af66fc99e Initial load
duke
parents:
diff changeset
3305 JvmtiExport::enter_live_phase();
a61af66fc99e Initial load
duke
parents:
diff changeset
3306
a61af66fc99e Initial load
duke
parents:
diff changeset
3307 // Signal Dispatcher needs to be started before VMInit event is posted
a61af66fc99e Initial load
duke
parents:
diff changeset
3308 os::signal_init();
a61af66fc99e Initial load
duke
parents:
diff changeset
3309
a61af66fc99e Initial load
duke
parents:
diff changeset
3310 // Start Attach Listener if +StartAttachListener or it can't be started lazily
a61af66fc99e Initial load
duke
parents:
diff changeset
3311 if (!DisableAttachMechanism) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3312 if (StartAttachListener || AttachListener::init_at_startup()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3313 AttachListener::init();
a61af66fc99e Initial load
duke
parents:
diff changeset
3314 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3315 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3316
a61af66fc99e Initial load
duke
parents:
diff changeset
3317 // Launch -Xrun agents
a61af66fc99e Initial load
duke
parents:
diff changeset
3318 // Must be done in the JVMTI live phase so that for backward compatibility the JDWP
a61af66fc99e Initial load
duke
parents:
diff changeset
3319 // back-end can launch with -Xdebug -Xrunjdwp.
a61af66fc99e Initial load
duke
parents:
diff changeset
3320 if (!EagerXrunInit && Arguments::init_libraries_at_startup()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3321 create_vm_init_libraries();
a61af66fc99e Initial load
duke
parents:
diff changeset
3322 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3323
a61af66fc99e Initial load
duke
parents:
diff changeset
3324 // Notify JVMTI agents that VM initialization is complete - nop if no agents.
a61af66fc99e Initial load
duke
parents:
diff changeset
3325 JvmtiExport::post_vm_initialized();
a61af66fc99e Initial load
duke
parents:
diff changeset
3326
a61af66fc99e Initial load
duke
parents:
diff changeset
3327 Chunk::start_chunk_pool_cleaner_task();
a61af66fc99e Initial load
duke
parents:
diff changeset
3328
a61af66fc99e Initial load
duke
parents:
diff changeset
3329 // initialize compiler(s)
a61af66fc99e Initial load
duke
parents:
diff changeset
3330 CompileBroker::compilation_init();
a61af66fc99e Initial load
duke
parents:
diff changeset
3331
a61af66fc99e Initial load
duke
parents:
diff changeset
3332 Management::initialize(THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
3333 if (HAS_PENDING_EXCEPTION) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3334 // management agent fails to start possibly due to
a61af66fc99e Initial load
duke
parents:
diff changeset
3335 // configuration problem and is responsible for printing
a61af66fc99e Initial load
duke
parents:
diff changeset
3336 // stack trace if appropriate. Simply exit VM.
a61af66fc99e Initial load
duke
parents:
diff changeset
3337 vm_exit(1);
a61af66fc99e Initial load
duke
parents:
diff changeset
3338 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3339
a61af66fc99e Initial load
duke
parents:
diff changeset
3340 if (Arguments::has_profile()) FlatProfiler::engage(main_thread, true);
a61af66fc99e Initial load
duke
parents:
diff changeset
3341 if (Arguments::has_alloc_profile()) AllocationProfiler::engage();
a61af66fc99e Initial load
duke
parents:
diff changeset
3342 if (MemProfiling) MemProfiler::engage();
a61af66fc99e Initial load
duke
parents:
diff changeset
3343 StatSampler::engage();
a61af66fc99e Initial load
duke
parents:
diff changeset
3344 if (CheckJNICalls) JniPeriodicChecker::engage();
a61af66fc99e Initial load
duke
parents:
diff changeset
3345
a61af66fc99e Initial load
duke
parents:
diff changeset
3346 BiasedLocking::init();
a61af66fc99e Initial load
duke
parents:
diff changeset
3347
a61af66fc99e Initial load
duke
parents:
diff changeset
3348
a61af66fc99e Initial load
duke
parents:
diff changeset
3349 // Start up the WatcherThread if there are any periodic tasks
a61af66fc99e Initial load
duke
parents:
diff changeset
3350 // NOTE: All PeriodicTasks should be registered by now. If they
a61af66fc99e Initial load
duke
parents:
diff changeset
3351 // aren't, late joiners might appear to start slowly (we might
a61af66fc99e Initial load
duke
parents:
diff changeset
3352 // take a while to process their first tick).
a61af66fc99e Initial load
duke
parents:
diff changeset
3353 if (PeriodicTask::num_tasks() > 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3354 WatcherThread::start();
a61af66fc99e Initial load
duke
parents:
diff changeset
3355 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3356
1681
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
3357 // Give os specific code one last chance to start
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
3358 os::init_3();
126ea7725993 6953477: Increase portability and flexibility of building Hotspot
bobv
parents: 1608
diff changeset
3359
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3360 create_vm_timer.end();
a61af66fc99e Initial load
duke
parents:
diff changeset
3361 return JNI_OK;
a61af66fc99e Initial load
duke
parents:
diff changeset
3362 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3363
a61af66fc99e Initial load
duke
parents:
diff changeset
3364 // type for the Agent_OnLoad and JVM_OnLoad entry points
a61af66fc99e Initial load
duke
parents:
diff changeset
3365 extern "C" {
a61af66fc99e Initial load
duke
parents:
diff changeset
3366 typedef jint (JNICALL *OnLoadEntry_t)(JavaVM *, char *, void *);
a61af66fc99e Initial load
duke
parents:
diff changeset
3367 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3368 // Find a command line agent library and return its entry point for
a61af66fc99e Initial load
duke
parents:
diff changeset
3369 // -agentlib: -agentpath: -Xrun
a61af66fc99e Initial load
duke
parents:
diff changeset
3370 // num_symbol_entries must be passed-in since only the caller knows the number of symbols in the array.
a61af66fc99e Initial load
duke
parents:
diff changeset
3371 static OnLoadEntry_t lookup_on_load(AgentLibrary* agent, const char *on_load_symbols[], size_t num_symbol_entries) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3372 OnLoadEntry_t on_load_entry = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3373 void *library = agent->os_lib(); // check if we have looked it up before
a61af66fc99e Initial load
duke
parents:
diff changeset
3374
a61af66fc99e Initial load
duke
parents:
diff changeset
3375 if (library == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3376 char buffer[JVM_MAXPATHLEN];
a61af66fc99e Initial load
duke
parents:
diff changeset
3377 char ebuf[1024];
a61af66fc99e Initial load
duke
parents:
diff changeset
3378 const char *name = agent->name();
1694
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3379 const char *msg = "Could not find agent library ";
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3380
a61af66fc99e Initial load
duke
parents:
diff changeset
3381 if (agent->is_absolute_path()) {
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
3382 library = os::dll_load(name, ebuf, sizeof ebuf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3383 if (library == NULL) {
1694
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3384 const char *sub_msg = " in absolute path, with error: ";
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3385 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1;
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3386 char *buf = NEW_C_HEAP_ARRAY(char, len);
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3387 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3388 // If we can't find the agent, exit.
1694
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3389 vm_exit_during_initialization(buf, NULL);
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3390 FREE_C_HEAP_ARRAY(char, buf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3391 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3392 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3393 // Try to load the agent from the standard dll directory
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
3394 os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), name);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
3395 library = os::dll_load(buffer, ebuf, sizeof ebuf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3396 #ifdef KERNEL
a61af66fc99e Initial load
duke
parents:
diff changeset
3397 // Download instrument dll
a61af66fc99e Initial load
duke
parents:
diff changeset
3398 if (library == NULL && strcmp(name, "instrument") == 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3399 char *props = Arguments::get_kernel_properties();
a61af66fc99e Initial load
duke
parents:
diff changeset
3400 char *home = Arguments::get_java_home();
a61af66fc99e Initial load
duke
parents:
diff changeset
3401 const char *fmt = "%s/bin/java %s -Dkernel.background.download=false"
a61af66fc99e Initial load
duke
parents:
diff changeset
3402 " sun.jkernel.DownloadManager -download client_jvm";
1694
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3403 size_t length = strlen(props) + strlen(home) + strlen(fmt) + 1;
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3404 char *cmd = NEW_C_HEAP_ARRAY(char, length);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3405 jio_snprintf(cmd, length, fmt, home, props);
a61af66fc99e Initial load
duke
parents:
diff changeset
3406 int status = os::fork_and_exec(cmd);
a61af66fc99e Initial load
duke
parents:
diff changeset
3407 FreeHeap(props);
a61af66fc99e Initial load
duke
parents:
diff changeset
3408 if (status == -1) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3409 warning(cmd);
a61af66fc99e Initial load
duke
parents:
diff changeset
3410 vm_exit_during_initialization("fork_and_exec failed: %s",
a61af66fc99e Initial load
duke
parents:
diff changeset
3411 strerror(errno));
a61af66fc99e Initial load
duke
parents:
diff changeset
3412 }
1694
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3413 FREE_C_HEAP_ARRAY(char, cmd);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3414 // when this comes back the instrument.dll should be where it belongs.
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
3415 library = os::dll_load(buffer, ebuf, sizeof ebuf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3416 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3417 #endif // KERNEL
a61af66fc99e Initial load
duke
parents:
diff changeset
3418 if (library == NULL) { // Try the local directory
a61af66fc99e Initial load
duke
parents:
diff changeset
3419 char ns[1] = {0};
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
3420 os::dll_build_name(buffer, sizeof(buffer), ns, name);
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
3421 library = os::dll_load(buffer, ebuf, sizeof ebuf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3422 if (library == NULL) {
1694
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3423 const char *sub_msg = " on the library path, with error: ";
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3424 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1;
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3425 char *buf = NEW_C_HEAP_ARRAY(char, len);
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3426 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3427 // If we can't find the agent, exit.
1694
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3428 vm_exit_during_initialization(buf, NULL);
ab3fd720516c 6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents: 1681
diff changeset
3429 FREE_C_HEAP_ARRAY(char, buf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3430 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3431 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3432 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3433 agent->set_os_lib(library);
a61af66fc99e Initial load
duke
parents:
diff changeset
3434 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3435
a61af66fc99e Initial load
duke
parents:
diff changeset
3436 // Find the OnLoad function.
a61af66fc99e Initial load
duke
parents:
diff changeset
3437 for (size_t symbol_index = 0; symbol_index < num_symbol_entries; symbol_index++) {
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
3438 on_load_entry = CAST_TO_FN_PTR(OnLoadEntry_t, os::dll_lookup(library, on_load_symbols[symbol_index]));
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3439 if (on_load_entry != NULL) break;
a61af66fc99e Initial load
duke
parents:
diff changeset
3440 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3441 return on_load_entry;
a61af66fc99e Initial load
duke
parents:
diff changeset
3442 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3443
a61af66fc99e Initial load
duke
parents:
diff changeset
3444 // Find the JVM_OnLoad entry point
a61af66fc99e Initial load
duke
parents:
diff changeset
3445 static OnLoadEntry_t lookup_jvm_on_load(AgentLibrary* agent) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3446 const char *on_load_symbols[] = JVM_ONLOAD_SYMBOLS;
a61af66fc99e Initial load
duke
parents:
diff changeset
3447 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*));
a61af66fc99e Initial load
duke
parents:
diff changeset
3448 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3449
a61af66fc99e Initial load
duke
parents:
diff changeset
3450 // Find the Agent_OnLoad entry point
a61af66fc99e Initial load
duke
parents:
diff changeset
3451 static OnLoadEntry_t lookup_agent_on_load(AgentLibrary* agent) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3452 const char *on_load_symbols[] = AGENT_ONLOAD_SYMBOLS;
a61af66fc99e Initial load
duke
parents:
diff changeset
3453 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*));
a61af66fc99e Initial load
duke
parents:
diff changeset
3454 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3455
a61af66fc99e Initial load
duke
parents:
diff changeset
3456 // For backwards compatibility with -Xrun
a61af66fc99e Initial load
duke
parents:
diff changeset
3457 // Convert libraries with no JVM_OnLoad, but which have Agent_OnLoad to be
a61af66fc99e Initial load
duke
parents:
diff changeset
3458 // treated like -agentpath:
a61af66fc99e Initial load
duke
parents:
diff changeset
3459 // Must be called before agent libraries are created
a61af66fc99e Initial load
duke
parents:
diff changeset
3460 void Threads::convert_vm_init_libraries_to_agents() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3461 AgentLibrary* agent;
a61af66fc99e Initial load
duke
parents:
diff changeset
3462 AgentLibrary* next;
a61af66fc99e Initial load
duke
parents:
diff changeset
3463
a61af66fc99e Initial load
duke
parents:
diff changeset
3464 for (agent = Arguments::libraries(); agent != NULL; agent = next) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3465 next = agent->next(); // cache the next agent now as this agent may get moved off this list
a61af66fc99e Initial load
duke
parents:
diff changeset
3466 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent);
a61af66fc99e Initial load
duke
parents:
diff changeset
3467
a61af66fc99e Initial load
duke
parents:
diff changeset
3468 // If there is an JVM_OnLoad function it will get called later,
a61af66fc99e Initial load
duke
parents:
diff changeset
3469 // otherwise see if there is an Agent_OnLoad
a61af66fc99e Initial load
duke
parents:
diff changeset
3470 if (on_load_entry == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3471 on_load_entry = lookup_agent_on_load(agent);
a61af66fc99e Initial load
duke
parents:
diff changeset
3472 if (on_load_entry != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3473 // switch it to the agent list -- so that Agent_OnLoad will be called,
a61af66fc99e Initial load
duke
parents:
diff changeset
3474 // JVM_OnLoad won't be attempted and Agent_OnUnload will
a61af66fc99e Initial load
duke
parents:
diff changeset
3475 Arguments::convert_library_to_agent(agent);
a61af66fc99e Initial load
duke
parents:
diff changeset
3476 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3477 vm_exit_during_initialization("Could not find JVM_OnLoad or Agent_OnLoad function in the library", agent->name());
a61af66fc99e Initial load
duke
parents:
diff changeset
3478 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3479 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3480 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3481 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3482
a61af66fc99e Initial load
duke
parents:
diff changeset
3483 // Create agents for -agentlib: -agentpath: and converted -Xrun
a61af66fc99e Initial load
duke
parents:
diff changeset
3484 // Invokes Agent_OnLoad
a61af66fc99e Initial load
duke
parents:
diff changeset
3485 // Called very early -- before JavaThreads exist
a61af66fc99e Initial load
duke
parents:
diff changeset
3486 void Threads::create_vm_init_agents() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3487 extern struct JavaVM_ main_vm;
a61af66fc99e Initial load
duke
parents:
diff changeset
3488 AgentLibrary* agent;
a61af66fc99e Initial load
duke
parents:
diff changeset
3489
a61af66fc99e Initial load
duke
parents:
diff changeset
3490 JvmtiExport::enter_onload_phase();
a61af66fc99e Initial load
duke
parents:
diff changeset
3491 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3492 OnLoadEntry_t on_load_entry = lookup_agent_on_load(agent);
a61af66fc99e Initial load
duke
parents:
diff changeset
3493
a61af66fc99e Initial load
duke
parents:
diff changeset
3494 if (on_load_entry != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3495 // Invoke the Agent_OnLoad function
a61af66fc99e Initial load
duke
parents:
diff changeset
3496 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3497 if (err != JNI_OK) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3498 vm_exit_during_initialization("agent library failed to init", agent->name());
a61af66fc99e Initial load
duke
parents:
diff changeset
3499 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3500 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3501 vm_exit_during_initialization("Could not find Agent_OnLoad function in the agent library", agent->name());
a61af66fc99e Initial load
duke
parents:
diff changeset
3502 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3503 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3504 JvmtiExport::enter_primordial_phase();
a61af66fc99e Initial load
duke
parents:
diff changeset
3505 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3506
a61af66fc99e Initial load
duke
parents:
diff changeset
3507 extern "C" {
a61af66fc99e Initial load
duke
parents:
diff changeset
3508 typedef void (JNICALL *Agent_OnUnload_t)(JavaVM *);
a61af66fc99e Initial load
duke
parents:
diff changeset
3509 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3510
a61af66fc99e Initial load
duke
parents:
diff changeset
3511 void Threads::shutdown_vm_agents() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3512 // Send any Agent_OnUnload notifications
a61af66fc99e Initial load
duke
parents:
diff changeset
3513 const char *on_unload_symbols[] = AGENT_ONUNLOAD_SYMBOLS;
a61af66fc99e Initial load
duke
parents:
diff changeset
3514 extern struct JavaVM_ main_vm;
a61af66fc99e Initial load
duke
parents:
diff changeset
3515 for (AgentLibrary* agent = Arguments::agents(); agent != NULL; agent = agent->next()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3516
a61af66fc99e Initial load
duke
parents:
diff changeset
3517 // Find the Agent_OnUnload function.
a61af66fc99e Initial load
duke
parents:
diff changeset
3518 for (uint symbol_index = 0; symbol_index < ARRAY_SIZE(on_unload_symbols); symbol_index++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3519 Agent_OnUnload_t unload_entry = CAST_TO_FN_PTR(Agent_OnUnload_t,
1980
828eafbd85cc 6348631: remove the use of the HPI library from Hotspot
ikrylov
parents: 1972
diff changeset
3520 os::dll_lookup(agent->os_lib(), on_unload_symbols[symbol_index]));
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3521
a61af66fc99e Initial load
duke
parents:
diff changeset
3522 // Invoke the Agent_OnUnload function
a61af66fc99e Initial load
duke
parents:
diff changeset
3523 if (unload_entry != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3524 JavaThread* thread = JavaThread::current();
a61af66fc99e Initial load
duke
parents:
diff changeset
3525 ThreadToNativeFromVM ttn(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
3526 HandleMark hm(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
3527 (*unload_entry)(&main_vm);
a61af66fc99e Initial load
duke
parents:
diff changeset
3528 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
3529 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3530 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3531 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3532 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3533
a61af66fc99e Initial load
duke
parents:
diff changeset
3534 // Called for after the VM is initialized for -Xrun libraries which have not been converted to agent libraries
a61af66fc99e Initial load
duke
parents:
diff changeset
3535 // Invokes JVM_OnLoad
a61af66fc99e Initial load
duke
parents:
diff changeset
3536 void Threads::create_vm_init_libraries() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3537 extern struct JavaVM_ main_vm;
a61af66fc99e Initial load
duke
parents:
diff changeset
3538 AgentLibrary* agent;
a61af66fc99e Initial load
duke
parents:
diff changeset
3539
a61af66fc99e Initial load
duke
parents:
diff changeset
3540 for (agent = Arguments::libraries(); agent != NULL; agent = agent->next()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3541 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent);
a61af66fc99e Initial load
duke
parents:
diff changeset
3542
a61af66fc99e Initial load
duke
parents:
diff changeset
3543 if (on_load_entry != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3544 // Invoke the JVM_OnLoad function
a61af66fc99e Initial load
duke
parents:
diff changeset
3545 JavaThread* thread = JavaThread::current();
a61af66fc99e Initial load
duke
parents:
diff changeset
3546 ThreadToNativeFromVM ttn(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
3547 HandleMark hm(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
3548 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3549 if (err != JNI_OK) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3550 vm_exit_during_initialization("-Xrun library failed to init", agent->name());
a61af66fc99e Initial load
duke
parents:
diff changeset
3551 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3552 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3553 vm_exit_during_initialization("Could not find JVM_OnLoad function in -Xrun library", agent->name());
a61af66fc99e Initial load
duke
parents:
diff changeset
3554 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3555 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3556 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3557
a61af66fc99e Initial load
duke
parents:
diff changeset
3558 // Last thread running calls java.lang.Shutdown.shutdown()
a61af66fc99e Initial load
duke
parents:
diff changeset
3559 void JavaThread::invoke_shutdown_hooks() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3560 HandleMark hm(this);
a61af66fc99e Initial load
duke
parents:
diff changeset
3561
a61af66fc99e Initial load
duke
parents:
diff changeset
3562 // We could get here with a pending exception, if so clear it now.
a61af66fc99e Initial load
duke
parents:
diff changeset
3563 if (this->has_pending_exception()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3564 this->clear_pending_exception();
a61af66fc99e Initial load
duke
parents:
diff changeset
3565 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3566
a61af66fc99e Initial load
duke
parents:
diff changeset
3567 EXCEPTION_MARK;
a61af66fc99e Initial load
duke
parents:
diff changeset
3568 klassOop k =
a61af66fc99e Initial load
duke
parents:
diff changeset
3569 SystemDictionary::resolve_or_null(vmSymbolHandles::java_lang_Shutdown(),
a61af66fc99e Initial load
duke
parents:
diff changeset
3570 THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
3571 if (k != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3572 // SystemDictionary::resolve_or_null will return null if there was
a61af66fc99e Initial load
duke
parents:
diff changeset
3573 // an exception. If we cannot load the Shutdown class, just don't
a61af66fc99e Initial load
duke
parents:
diff changeset
3574 // call Shutdown.shutdown() at all. This will mean the shutdown hooks
a61af66fc99e Initial load
duke
parents:
diff changeset
3575 // and finalizers (if runFinalizersOnExit is set) won't be run.
a61af66fc99e Initial load
duke
parents:
diff changeset
3576 // Note that if a shutdown hook was registered or runFinalizersOnExit
a61af66fc99e Initial load
duke
parents:
diff changeset
3577 // was called, the Shutdown class would have already been loaded
a61af66fc99e Initial load
duke
parents:
diff changeset
3578 // (Runtime.addShutdownHook and runFinalizersOnExit will load it).
a61af66fc99e Initial load
duke
parents:
diff changeset
3579 instanceKlassHandle shutdown_klass (THREAD, k);
a61af66fc99e Initial load
duke
parents:
diff changeset
3580 JavaValue result(T_VOID);
a61af66fc99e Initial load
duke
parents:
diff changeset
3581 JavaCalls::call_static(&result,
a61af66fc99e Initial load
duke
parents:
diff changeset
3582 shutdown_klass,
a61af66fc99e Initial load
duke
parents:
diff changeset
3583 vmSymbolHandles::shutdown_method_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
3584 vmSymbolHandles::void_method_signature(),
a61af66fc99e Initial load
duke
parents:
diff changeset
3585 THREAD);
a61af66fc99e Initial load
duke
parents:
diff changeset
3586 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3587 CLEAR_PENDING_EXCEPTION;
a61af66fc99e Initial load
duke
parents:
diff changeset
3588 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3589
a61af66fc99e Initial load
duke
parents:
diff changeset
3590 // Threads::destroy_vm() is normally called from jni_DestroyJavaVM() when
a61af66fc99e Initial load
duke
parents:
diff changeset
3591 // the program falls off the end of main(). Another VM exit path is through
a61af66fc99e Initial load
duke
parents:
diff changeset
3592 // vm_exit() when the program calls System.exit() to return a value or when
a61af66fc99e Initial load
duke
parents:
diff changeset
3593 // there is a serious error in VM. The two shutdown paths are not exactly
a61af66fc99e Initial load
duke
parents:
diff changeset
3594 // the same, but they share Shutdown.shutdown() at Java level and before_exit()
a61af66fc99e Initial load
duke
parents:
diff changeset
3595 // and VM_Exit op at VM level.
a61af66fc99e Initial load
duke
parents:
diff changeset
3596 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3597 // Shutdown sequence:
a61af66fc99e Initial load
duke
parents:
diff changeset
3598 // + Wait until we are the last non-daemon thread to execute
a61af66fc99e Initial load
duke
parents:
diff changeset
3599 // <-- every thing is still working at this moment -->
a61af66fc99e Initial load
duke
parents:
diff changeset
3600 // + Call java.lang.Shutdown.shutdown(), which will invoke Java level
a61af66fc99e Initial load
duke
parents:
diff changeset
3601 // shutdown hooks, run finalizers if finalization-on-exit
a61af66fc99e Initial load
duke
parents:
diff changeset
3602 // + Call before_exit(), prepare for VM exit
a61af66fc99e Initial load
duke
parents:
diff changeset
3603 // > run VM level shutdown hooks (they are registered through JVM_OnExit(),
a61af66fc99e Initial load
duke
parents:
diff changeset
3604 // currently the only user of this mechanism is File.deleteOnExit())
a61af66fc99e Initial load
duke
parents:
diff changeset
3605 // > stop flat profiler, StatSampler, watcher thread, CMS threads,
a61af66fc99e Initial load
duke
parents:
diff changeset
3606 // post thread end and vm death events to JVMTI,
a61af66fc99e Initial load
duke
parents:
diff changeset
3607 // stop signal thread
a61af66fc99e Initial load
duke
parents:
diff changeset
3608 // + Call JavaThread::exit(), it will:
a61af66fc99e Initial load
duke
parents:
diff changeset
3609 // > release JNI handle blocks, remove stack guard pages
a61af66fc99e Initial load
duke
parents:
diff changeset
3610 // > remove this thread from Threads list
a61af66fc99e Initial load
duke
parents:
diff changeset
3611 // <-- no more Java code from this thread after this point -->
a61af66fc99e Initial load
duke
parents:
diff changeset
3612 // + Stop VM thread, it will bring the remaining VM to a safepoint and stop
a61af66fc99e Initial load
duke
parents:
diff changeset
3613 // the compiler threads at safepoint
a61af66fc99e Initial load
duke
parents:
diff changeset
3614 // <-- do not use anything that could get blocked by Safepoint -->
a61af66fc99e Initial load
duke
parents:
diff changeset
3615 // + Disable tracing at JNI/JVM barriers
a61af66fc99e Initial load
duke
parents:
diff changeset
3616 // + Set _vm_exited flag for threads that are still running native code
a61af66fc99e Initial load
duke
parents:
diff changeset
3617 // + Delete this thread
a61af66fc99e Initial load
duke
parents:
diff changeset
3618 // + Call exit_globals()
a61af66fc99e Initial load
duke
parents:
diff changeset
3619 // > deletes tty
a61af66fc99e Initial load
duke
parents:
diff changeset
3620 // > deletes PerfMemory resources
a61af66fc99e Initial load
duke
parents:
diff changeset
3621 // + Return to caller
a61af66fc99e Initial load
duke
parents:
diff changeset
3622
a61af66fc99e Initial load
duke
parents:
diff changeset
3623 bool Threads::destroy_vm() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3624 JavaThread* thread = JavaThread::current();
a61af66fc99e Initial load
duke
parents:
diff changeset
3625
a61af66fc99e Initial load
duke
parents:
diff changeset
3626 // Wait until we are the last non-daemon thread to execute
a61af66fc99e Initial load
duke
parents:
diff changeset
3627 { MutexLocker nu(Threads_lock);
a61af66fc99e Initial load
duke
parents:
diff changeset
3628 while (Threads::number_of_non_daemon_threads() > 1 )
a61af66fc99e Initial load
duke
parents:
diff changeset
3629 // This wait should make safepoint checks, wait without a timeout,
a61af66fc99e Initial load
duke
parents:
diff changeset
3630 // and wait as a suspend-equivalent condition.
a61af66fc99e Initial load
duke
parents:
diff changeset
3631 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3632 // Note: If the FlatProfiler is running and this thread is waiting
a61af66fc99e Initial load
duke
parents:
diff changeset
3633 // for another non-daemon thread to finish, then the FlatProfiler
a61af66fc99e Initial load
duke
parents:
diff changeset
3634 // is waiting for the external suspend request on this thread to
a61af66fc99e Initial load
duke
parents:
diff changeset
3635 // complete. wait_for_ext_suspend_completion() will eventually
a61af66fc99e Initial load
duke
parents:
diff changeset
3636 // timeout, but that takes time. Making this wait a suspend-
a61af66fc99e Initial load
duke
parents:
diff changeset
3637 // equivalent condition solves that timeout problem.
a61af66fc99e Initial load
duke
parents:
diff changeset
3638 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3639 Threads_lock->wait(!Mutex::_no_safepoint_check_flag, 0,
a61af66fc99e Initial load
duke
parents:
diff changeset
3640 Mutex::_as_suspend_equivalent_flag);
a61af66fc99e Initial load
duke
parents:
diff changeset
3641 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3642
a61af66fc99e Initial load
duke
parents:
diff changeset
3643 // Hang forever on exit if we are reporting an error.
a61af66fc99e Initial load
duke
parents:
diff changeset
3644 if (ShowMessageBoxOnError && is_error_reported()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3645 os::infinite_sleep();
a61af66fc99e Initial load
duke
parents:
diff changeset
3646 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3647
a61af66fc99e Initial load
duke
parents:
diff changeset
3648 if (JDK_Version::is_jdk12x_version()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3649 // We are the last thread running, so check if finalizers should be run.
a61af66fc99e Initial load
duke
parents:
diff changeset
3650 // For 1.3 or later this is done in thread->invoke_shutdown_hooks()
a61af66fc99e Initial load
duke
parents:
diff changeset
3651 HandleMark rm(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
3652 Universe::run_finalizers_on_exit();
a61af66fc99e Initial load
duke
parents:
diff changeset
3653 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3654 // run Java level shutdown hooks
a61af66fc99e Initial load
duke
parents:
diff changeset
3655 thread->invoke_shutdown_hooks();
a61af66fc99e Initial load
duke
parents:
diff changeset
3656 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3657
a61af66fc99e Initial load
duke
parents:
diff changeset
3658 before_exit(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
3659
a61af66fc99e Initial load
duke
parents:
diff changeset
3660 thread->exit(true);
a61af66fc99e Initial load
duke
parents:
diff changeset
3661
a61af66fc99e Initial load
duke
parents:
diff changeset
3662 // Stop VM thread.
a61af66fc99e Initial load
duke
parents:
diff changeset
3663 {
a61af66fc99e Initial load
duke
parents:
diff changeset
3664 // 4945125 The vm thread comes to a safepoint during exit.
a61af66fc99e Initial load
duke
parents:
diff changeset
3665 // GC vm_operations can get caught at the safepoint, and the
a61af66fc99e Initial load
duke
parents:
diff changeset
3666 // heap is unparseable if they are caught. Grab the Heap_lock
a61af66fc99e Initial load
duke
parents:
diff changeset
3667 // to prevent this. The GC vm_operations will not be able to
a61af66fc99e Initial load
duke
parents:
diff changeset
3668 // queue until after the vm thread is dead.
a61af66fc99e Initial load
duke
parents:
diff changeset
3669 MutexLocker ml(Heap_lock);
a61af66fc99e Initial load
duke
parents:
diff changeset
3670
a61af66fc99e Initial load
duke
parents:
diff changeset
3671 VMThread::wait_for_vm_thread_exit();
a61af66fc99e Initial load
duke
parents:
diff changeset
3672 assert(SafepointSynchronize::is_at_safepoint(), "VM thread should exit at Safepoint");
a61af66fc99e Initial load
duke
parents:
diff changeset
3673 VMThread::destroy();
a61af66fc99e Initial load
duke
parents:
diff changeset
3674 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3675
a61af66fc99e Initial load
duke
parents:
diff changeset
3676 // clean up ideal graph printers
a61af66fc99e Initial load
duke
parents:
diff changeset
3677 #if defined(COMPILER2) && !defined(PRODUCT)
a61af66fc99e Initial load
duke
parents:
diff changeset
3678 IdealGraphPrinter::clean_up();
a61af66fc99e Initial load
duke
parents:
diff changeset
3679 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
3680
a61af66fc99e Initial load
duke
parents:
diff changeset
3681 // Now, all Java threads are gone except daemon threads. Daemon threads
a61af66fc99e Initial load
duke
parents:
diff changeset
3682 // running Java code or in VM are stopped by the Safepoint. However,
a61af66fc99e Initial load
duke
parents:
diff changeset
3683 // daemon threads executing native code are still running. But they
a61af66fc99e Initial load
duke
parents:
diff changeset
3684 // will be stopped at native=>Java/VM barriers. Note that we can't
a61af66fc99e Initial load
duke
parents:
diff changeset
3685 // simply kill or suspend them, as it is inherently deadlock-prone.
a61af66fc99e Initial load
duke
parents:
diff changeset
3686
a61af66fc99e Initial load
duke
parents:
diff changeset
3687 #ifndef PRODUCT
a61af66fc99e Initial load
duke
parents:
diff changeset
3688 // disable function tracing at JNI/JVM barriers
a61af66fc99e Initial load
duke
parents:
diff changeset
3689 TraceJNICalls = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3690 TraceJVMCalls = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3691 TraceRuntimeCalls = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3692 #endif
a61af66fc99e Initial load
duke
parents:
diff changeset
3693
a61af66fc99e Initial load
duke
parents:
diff changeset
3694 VM_Exit::set_vm_exited();
a61af66fc99e Initial load
duke
parents:
diff changeset
3695
a61af66fc99e Initial load
duke
parents:
diff changeset
3696 notify_vm_shutdown();
a61af66fc99e Initial load
duke
parents:
diff changeset
3697
a61af66fc99e Initial load
duke
parents:
diff changeset
3698 delete thread;
a61af66fc99e Initial load
duke
parents:
diff changeset
3699
a61af66fc99e Initial load
duke
parents:
diff changeset
3700 // exit_globals() will delete tty
a61af66fc99e Initial load
duke
parents:
diff changeset
3701 exit_globals();
a61af66fc99e Initial load
duke
parents:
diff changeset
3702
a61af66fc99e Initial load
duke
parents:
diff changeset
3703 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
3704 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3705
a61af66fc99e Initial load
duke
parents:
diff changeset
3706
a61af66fc99e Initial load
duke
parents:
diff changeset
3707 jboolean Threads::is_supported_jni_version_including_1_1(jint version) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3708 if (version == JNI_VERSION_1_1) return JNI_TRUE;
a61af66fc99e Initial load
duke
parents:
diff changeset
3709 return is_supported_jni_version(version);
a61af66fc99e Initial load
duke
parents:
diff changeset
3710 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3711
a61af66fc99e Initial load
duke
parents:
diff changeset
3712
a61af66fc99e Initial load
duke
parents:
diff changeset
3713 jboolean Threads::is_supported_jni_version(jint version) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3714 if (version == JNI_VERSION_1_2) return JNI_TRUE;
a61af66fc99e Initial load
duke
parents:
diff changeset
3715 if (version == JNI_VERSION_1_4) return JNI_TRUE;
a61af66fc99e Initial load
duke
parents:
diff changeset
3716 if (version == JNI_VERSION_1_6) return JNI_TRUE;
a61af66fc99e Initial load
duke
parents:
diff changeset
3717 return JNI_FALSE;
a61af66fc99e Initial load
duke
parents:
diff changeset
3718 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3719
a61af66fc99e Initial load
duke
parents:
diff changeset
3720
a61af66fc99e Initial load
duke
parents:
diff changeset
3721 void Threads::add(JavaThread* p, bool force_daemon) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3722 // The threads lock must be owned at this point
a61af66fc99e Initial load
duke
parents:
diff changeset
3723 assert_locked_or_safepoint(Threads_lock);
1842
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
3724
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
3725 // See the comment for this method in thread.hpp for its purpose and
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
3726 // why it is called here.
6e0aac35bfa9 6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents: 1838
diff changeset
3727 p->initialize_queues();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3728 p->set_next(_thread_list);
a61af66fc99e Initial load
duke
parents:
diff changeset
3729 _thread_list = p;
a61af66fc99e Initial load
duke
parents:
diff changeset
3730 _number_of_threads++;
a61af66fc99e Initial load
duke
parents:
diff changeset
3731 oop threadObj = p->threadObj();
a61af66fc99e Initial load
duke
parents:
diff changeset
3732 bool daemon = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
3733 // Bootstrapping problem: threadObj can be null for initial
a61af66fc99e Initial load
duke
parents:
diff changeset
3734 // JavaThread (or for threads attached via JNI)
a61af66fc99e Initial load
duke
parents:
diff changeset
3735 if ((!force_daemon) && (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj))) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3736 _number_of_non_daemon_threads++;
a61af66fc99e Initial load
duke
parents:
diff changeset
3737 daemon = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3738 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3739
a61af66fc99e Initial load
duke
parents:
diff changeset
3740 ThreadService::add_thread(p, daemon);
a61af66fc99e Initial load
duke
parents:
diff changeset
3741
a61af66fc99e Initial load
duke
parents:
diff changeset
3742 // Possible GC point.
a61af66fc99e Initial load
duke
parents:
diff changeset
3743 Events::log("Thread added: " INTPTR_FORMAT, p);
a61af66fc99e Initial load
duke
parents:
diff changeset
3744 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3745
a61af66fc99e Initial load
duke
parents:
diff changeset
3746 void Threads::remove(JavaThread* p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3747 // Extra scope needed for Thread_lock, so we can check
a61af66fc99e Initial load
duke
parents:
diff changeset
3748 // that we do not remove thread without safepoint code notice
a61af66fc99e Initial load
duke
parents:
diff changeset
3749 { MutexLocker ml(Threads_lock);
a61af66fc99e Initial load
duke
parents:
diff changeset
3750
a61af66fc99e Initial load
duke
parents:
diff changeset
3751 assert(includes(p), "p must be present");
a61af66fc99e Initial load
duke
parents:
diff changeset
3752
a61af66fc99e Initial load
duke
parents:
diff changeset
3753 JavaThread* current = _thread_list;
a61af66fc99e Initial load
duke
parents:
diff changeset
3754 JavaThread* prev = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3755
a61af66fc99e Initial load
duke
parents:
diff changeset
3756 while (current != p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3757 prev = current;
a61af66fc99e Initial load
duke
parents:
diff changeset
3758 current = current->next();
a61af66fc99e Initial load
duke
parents:
diff changeset
3759 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3760
a61af66fc99e Initial load
duke
parents:
diff changeset
3761 if (prev) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3762 prev->set_next(current->next());
a61af66fc99e Initial load
duke
parents:
diff changeset
3763 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3764 _thread_list = p->next();
a61af66fc99e Initial load
duke
parents:
diff changeset
3765 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3766 _number_of_threads--;
a61af66fc99e Initial load
duke
parents:
diff changeset
3767 oop threadObj = p->threadObj();
a61af66fc99e Initial load
duke
parents:
diff changeset
3768 bool daemon = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
3769 if (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3770 _number_of_non_daemon_threads--;
a61af66fc99e Initial load
duke
parents:
diff changeset
3771 daemon = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3772
a61af66fc99e Initial load
duke
parents:
diff changeset
3773 // Only one thread left, do a notify on the Threads_lock so a thread waiting
a61af66fc99e Initial load
duke
parents:
diff changeset
3774 // on destroy_vm will wake up.
a61af66fc99e Initial load
duke
parents:
diff changeset
3775 if (number_of_non_daemon_threads() == 1)
a61af66fc99e Initial load
duke
parents:
diff changeset
3776 Threads_lock->notify_all();
a61af66fc99e Initial load
duke
parents:
diff changeset
3777 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3778 ThreadService::remove_thread(p, daemon);
a61af66fc99e Initial load
duke
parents:
diff changeset
3779
a61af66fc99e Initial load
duke
parents:
diff changeset
3780 // Make sure that safepoint code disregard this thread. This is needed since
a61af66fc99e Initial load
duke
parents:
diff changeset
3781 // the thread might mess around with locks after this point. This can cause it
a61af66fc99e Initial load
duke
parents:
diff changeset
3782 // to do callbacks into the safepoint code. However, the safepoint code is not aware
a61af66fc99e Initial load
duke
parents:
diff changeset
3783 // of this thread since it is removed from the queue.
a61af66fc99e Initial load
duke
parents:
diff changeset
3784 p->set_terminated_value();
a61af66fc99e Initial load
duke
parents:
diff changeset
3785 } // unlock Threads_lock
a61af66fc99e Initial load
duke
parents:
diff changeset
3786
a61af66fc99e Initial load
duke
parents:
diff changeset
3787 // Since Events::log uses a lock, we grab it outside the Threads_lock
a61af66fc99e Initial load
duke
parents:
diff changeset
3788 Events::log("Thread exited: " INTPTR_FORMAT, p);
a61af66fc99e Initial load
duke
parents:
diff changeset
3789 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3790
a61af66fc99e Initial load
duke
parents:
diff changeset
3791 // Threads_lock must be held when this is called (or must be called during a safepoint)
a61af66fc99e Initial load
duke
parents:
diff changeset
3792 bool Threads::includes(JavaThread* p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3793 assert(Threads_lock->is_locked(), "sanity check");
a61af66fc99e Initial load
duke
parents:
diff changeset
3794 ALL_JAVA_THREADS(q) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3795 if (q == p ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3796 return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
3797 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3798 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3799 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3800 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3801
a61af66fc99e Initial load
duke
parents:
diff changeset
3802 // Operations on the Threads list for GC. These are not explicitly locked,
a61af66fc99e Initial load
duke
parents:
diff changeset
3803 // but the garbage collector must provide a safe context for them to run.
a61af66fc99e Initial load
duke
parents:
diff changeset
3804 // In particular, these things should never be called when the Threads_lock
a61af66fc99e Initial load
duke
parents:
diff changeset
3805 // is held by some other thread. (Note: the Safepoint abstraction also
a61af66fc99e Initial load
duke
parents:
diff changeset
3806 // uses the Threads_lock to gurantee this property. It also makes sure that
a61af66fc99e Initial load
duke
parents:
diff changeset
3807 // all threads gets blocked when exiting or starting).
a61af66fc99e Initial load
duke
parents:
diff changeset
3808
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
3809 void Threads::oops_do(OopClosure* f, CodeBlobClosure* cf) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3810 ALL_JAVA_THREADS(p) {
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
3811 p->oops_do(f, cf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3812 }
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
3813 VMThread::vm_thread()->oops_do(f, cf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3814 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3815
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
3816 void Threads::possibly_parallel_oops_do(OopClosure* f, CodeBlobClosure* cf) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3817 // Introduce a mechanism allowing parallel threads to claim threads as
a61af66fc99e Initial load
duke
parents:
diff changeset
3818 // root groups. Overhead should be small enough to use all the time,
a61af66fc99e Initial load
duke
parents:
diff changeset
3819 // even in sequential code.
a61af66fc99e Initial load
duke
parents:
diff changeset
3820 SharedHeap* sh = SharedHeap::heap();
a61af66fc99e Initial load
duke
parents:
diff changeset
3821 bool is_par = (sh->n_par_threads() > 0);
a61af66fc99e Initial load
duke
parents:
diff changeset
3822 int cp = SharedHeap::heap()->strong_roots_parity();
a61af66fc99e Initial load
duke
parents:
diff changeset
3823 ALL_JAVA_THREADS(p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3824 if (p->claim_oops_do(is_par, cp)) {
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
3825 p->oops_do(f, cf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3826 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3827 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3828 VMThread* vmt = VMThread::vm_thread();
a61af66fc99e Initial load
duke
parents:
diff changeset
3829 if (vmt->claim_oops_do(is_par, cp))
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
3830 vmt->oops_do(f, cf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3831 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3832
a61af66fc99e Initial load
duke
parents:
diff changeset
3833 #ifndef SERIALGC
a61af66fc99e Initial load
duke
parents:
diff changeset
3834 // Used by ParallelScavenge
a61af66fc99e Initial load
duke
parents:
diff changeset
3835 void Threads::create_thread_roots_tasks(GCTaskQueue* q) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3836 ALL_JAVA_THREADS(p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3837 q->enqueue(new ThreadRootsTask(p));
a61af66fc99e Initial load
duke
parents:
diff changeset
3838 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3839 q->enqueue(new ThreadRootsTask(VMThread::vm_thread()));
a61af66fc99e Initial load
duke
parents:
diff changeset
3840 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3841
a61af66fc99e Initial load
duke
parents:
diff changeset
3842 // Used by Parallel Old
a61af66fc99e Initial load
duke
parents:
diff changeset
3843 void Threads::create_thread_roots_marking_tasks(GCTaskQueue* q) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3844 ALL_JAVA_THREADS(p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3845 q->enqueue(new ThreadRootsMarkingTask(p));
a61af66fc99e Initial load
duke
parents:
diff changeset
3846 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3847 q->enqueue(new ThreadRootsMarkingTask(VMThread::vm_thread()));
a61af66fc99e Initial load
duke
parents:
diff changeset
3848 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3849 #endif // SERIALGC
a61af66fc99e Initial load
duke
parents:
diff changeset
3850
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
3851 void Threads::nmethods_do(CodeBlobClosure* cf) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3852 ALL_JAVA_THREADS(p) {
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
3853 p->nmethods_do(cf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3854 }
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 844
diff changeset
3855 VMThread::vm_thread()->nmethods_do(cf);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3856 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3857
a61af66fc99e Initial load
duke
parents:
diff changeset
3858 void Threads::gc_epilogue() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3859 ALL_JAVA_THREADS(p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3860 p->gc_epilogue();
a61af66fc99e Initial load
duke
parents:
diff changeset
3861 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3862 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3863
a61af66fc99e Initial load
duke
parents:
diff changeset
3864 void Threads::gc_prologue() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3865 ALL_JAVA_THREADS(p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3866 p->gc_prologue();
a61af66fc99e Initial load
duke
parents:
diff changeset
3867 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3868 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3869
a61af66fc99e Initial load
duke
parents:
diff changeset
3870 void Threads::deoptimized_wrt_marked_nmethods() {
a61af66fc99e Initial load
duke
parents:
diff changeset
3871 ALL_JAVA_THREADS(p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3872 p->deoptimized_wrt_marked_nmethods();
a61af66fc99e Initial load
duke
parents:
diff changeset
3873 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3874 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3875
a61af66fc99e Initial load
duke
parents:
diff changeset
3876
a61af66fc99e Initial load
duke
parents:
diff changeset
3877 // Get count Java threads that are waiting to enter the specified monitor.
a61af66fc99e Initial load
duke
parents:
diff changeset
3878 GrowableArray<JavaThread*>* Threads::get_pending_threads(int count,
a61af66fc99e Initial load
duke
parents:
diff changeset
3879 address monitor, bool doLock) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3880 assert(doLock || SafepointSynchronize::is_at_safepoint(),
a61af66fc99e Initial load
duke
parents:
diff changeset
3881 "must grab Threads_lock or be at safepoint");
a61af66fc99e Initial load
duke
parents:
diff changeset
3882 GrowableArray<JavaThread*>* result = new GrowableArray<JavaThread*>(count);
a61af66fc99e Initial load
duke
parents:
diff changeset
3883
a61af66fc99e Initial load
duke
parents:
diff changeset
3884 int i = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
3885 {
a61af66fc99e Initial load
duke
parents:
diff changeset
3886 MutexLockerEx ml(doLock ? Threads_lock : NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3887 ALL_JAVA_THREADS(p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3888 if (p->is_Compiler_thread()) continue;
a61af66fc99e Initial load
duke
parents:
diff changeset
3889
a61af66fc99e Initial load
duke
parents:
diff changeset
3890 address pending = (address)p->current_pending_monitor();
a61af66fc99e Initial load
duke
parents:
diff changeset
3891 if (pending == monitor) { // found a match
a61af66fc99e Initial load
duke
parents:
diff changeset
3892 if (i < count) result->append(p); // save the first count matches
a61af66fc99e Initial load
duke
parents:
diff changeset
3893 i++;
a61af66fc99e Initial load
duke
parents:
diff changeset
3894 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3895 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3896 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3897 return result;
a61af66fc99e Initial load
duke
parents:
diff changeset
3898 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3899
a61af66fc99e Initial load
duke
parents:
diff changeset
3900
a61af66fc99e Initial load
duke
parents:
diff changeset
3901 JavaThread *Threads::owning_thread_from_monitor_owner(address owner, bool doLock) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3902 assert(doLock ||
a61af66fc99e Initial load
duke
parents:
diff changeset
3903 Threads_lock->owned_by_self() ||
a61af66fc99e Initial load
duke
parents:
diff changeset
3904 SafepointSynchronize::is_at_safepoint(),
a61af66fc99e Initial load
duke
parents:
diff changeset
3905 "must grab Threads_lock or be at safepoint");
a61af66fc99e Initial load
duke
parents:
diff changeset
3906
a61af66fc99e Initial load
duke
parents:
diff changeset
3907 // NULL owner means not locked so we can skip the search
a61af66fc99e Initial load
duke
parents:
diff changeset
3908 if (owner == NULL) return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3909
a61af66fc99e Initial load
duke
parents:
diff changeset
3910 {
a61af66fc99e Initial load
duke
parents:
diff changeset
3911 MutexLockerEx ml(doLock ? Threads_lock : NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3912 ALL_JAVA_THREADS(p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3913 // first, see if owner is the address of a Java thread
a61af66fc99e Initial load
duke
parents:
diff changeset
3914 if (owner == (address)p) return p;
a61af66fc99e Initial load
duke
parents:
diff changeset
3915 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3916 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3917 assert(UseHeavyMonitors == false, "Did not find owning Java thread with UseHeavyMonitors enabled");
a61af66fc99e Initial load
duke
parents:
diff changeset
3918 if (UseHeavyMonitors) return NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3919
a61af66fc99e Initial load
duke
parents:
diff changeset
3920 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3921 // If we didn't find a matching Java thread and we didn't force use of
a61af66fc99e Initial load
duke
parents:
diff changeset
3922 // heavyweight monitors, then the owner is the stack address of the
a61af66fc99e Initial load
duke
parents:
diff changeset
3923 // Lock Word in the owning Java thread's stack.
a61af66fc99e Initial load
duke
parents:
diff changeset
3924 //
a61af66fc99e Initial load
duke
parents:
diff changeset
3925 JavaThread* the_owner = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
3926 {
a61af66fc99e Initial load
duke
parents:
diff changeset
3927 MutexLockerEx ml(doLock ? Threads_lock : NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
3928 ALL_JAVA_THREADS(q) {
702
b9fba36710f2 6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents: 669
diff changeset
3929 if (q->is_lock_owned(owner)) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3930 the_owner = q;
702
b9fba36710f2 6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents: 669
diff changeset
3931 break;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3932 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3933 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3934 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3935 assert(the_owner != NULL, "Did not find owning Java thread for lock word address");
a61af66fc99e Initial load
duke
parents:
diff changeset
3936 return the_owner;
a61af66fc99e Initial load
duke
parents:
diff changeset
3937 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3938
a61af66fc99e Initial load
duke
parents:
diff changeset
3939 // Threads::print_on() is called at safepoint by VM_PrintThreads operation.
a61af66fc99e Initial load
duke
parents:
diff changeset
3940 void Threads::print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3941 char buf[32];
a61af66fc99e Initial load
duke
parents:
diff changeset
3942 st->print_cr(os::local_time_string(buf, sizeof(buf)));
a61af66fc99e Initial load
duke
parents:
diff changeset
3943
a61af66fc99e Initial load
duke
parents:
diff changeset
3944 st->print_cr("Full thread dump %s (%s %s):",
a61af66fc99e Initial load
duke
parents:
diff changeset
3945 Abstract_VM_Version::vm_name(),
a61af66fc99e Initial load
duke
parents:
diff changeset
3946 Abstract_VM_Version::vm_release(),
a61af66fc99e Initial load
duke
parents:
diff changeset
3947 Abstract_VM_Version::vm_info_string()
a61af66fc99e Initial load
duke
parents:
diff changeset
3948 );
a61af66fc99e Initial load
duke
parents:
diff changeset
3949 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
3950
a61af66fc99e Initial load
duke
parents:
diff changeset
3951 #ifndef SERIALGC
a61af66fc99e Initial load
duke
parents:
diff changeset
3952 // Dump concurrent locks
a61af66fc99e Initial load
duke
parents:
diff changeset
3953 ConcurrentLocksDump concurrent_locks;
a61af66fc99e Initial load
duke
parents:
diff changeset
3954 if (print_concurrent_locks) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3955 concurrent_locks.dump_at_safepoint();
a61af66fc99e Initial load
duke
parents:
diff changeset
3956 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3957 #endif // SERIALGC
a61af66fc99e Initial load
duke
parents:
diff changeset
3958
a61af66fc99e Initial load
duke
parents:
diff changeset
3959 ALL_JAVA_THREADS(p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3960 ResourceMark rm;
a61af66fc99e Initial load
duke
parents:
diff changeset
3961 p->print_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
3962 if (print_stacks) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3963 if (internal_format) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3964 p->trace_stack();
a61af66fc99e Initial load
duke
parents:
diff changeset
3965 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
3966 p->print_stack_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
3967 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3968 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3969 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
3970 #ifndef SERIALGC
a61af66fc99e Initial load
duke
parents:
diff changeset
3971 if (print_concurrent_locks) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3972 concurrent_locks.print_locks_on(p, st);
a61af66fc99e Initial load
duke
parents:
diff changeset
3973 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3974 #endif // SERIALGC
a61af66fc99e Initial load
duke
parents:
diff changeset
3975 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3976
a61af66fc99e Initial load
duke
parents:
diff changeset
3977 VMThread::vm_thread()->print_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
3978 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
3979 Universe::heap()->print_gc_threads_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
3980 WatcherThread* wt = WatcherThread::watcher_thread();
a61af66fc99e Initial load
duke
parents:
diff changeset
3981 if (wt != NULL) wt->print_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
3982 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
3983 CompileBroker::print_compiler_threads_on(st);
a61af66fc99e Initial load
duke
parents:
diff changeset
3984 st->flush();
a61af66fc99e Initial load
duke
parents:
diff changeset
3985 }
a61af66fc99e Initial load
duke
parents:
diff changeset
3986
a61af66fc99e Initial load
duke
parents:
diff changeset
3987 // Threads::print_on_error() is called by fatal error handler. It's possible
a61af66fc99e Initial load
duke
parents:
diff changeset
3988 // that VM is not at safepoint and/or current thread is inside signal handler.
a61af66fc99e Initial load
duke
parents:
diff changeset
3989 // Don't print stack trace, as the stack may not be walkable. Don't allocate
a61af66fc99e Initial load
duke
parents:
diff changeset
3990 // memory (even in resource area), it might deadlock the error handler.
a61af66fc99e Initial load
duke
parents:
diff changeset
3991 void Threads::print_on_error(outputStream* st, Thread* current, char* buf, int buflen) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3992 bool found_current = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
3993 st->print_cr("Java Threads: ( => current thread )");
a61af66fc99e Initial load
duke
parents:
diff changeset
3994 ALL_JAVA_THREADS(thread) {
a61af66fc99e Initial load
duke
parents:
diff changeset
3995 bool is_current = (current == thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
3996 found_current = found_current || is_current;
a61af66fc99e Initial load
duke
parents:
diff changeset
3997
a61af66fc99e Initial load
duke
parents:
diff changeset
3998 st->print("%s", is_current ? "=>" : " ");
a61af66fc99e Initial load
duke
parents:
diff changeset
3999
a61af66fc99e Initial load
duke
parents:
diff changeset
4000 st->print(PTR_FORMAT, thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
4001 st->print(" ");
a61af66fc99e Initial load
duke
parents:
diff changeset
4002 thread->print_on_error(st, buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
4003 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
4004 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4005 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
4006
a61af66fc99e Initial load
duke
parents:
diff changeset
4007 st->print_cr("Other Threads:");
a61af66fc99e Initial load
duke
parents:
diff changeset
4008 if (VMThread::vm_thread()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4009 bool is_current = (current == VMThread::vm_thread());
a61af66fc99e Initial load
duke
parents:
diff changeset
4010 found_current = found_current || is_current;
a61af66fc99e Initial load
duke
parents:
diff changeset
4011 st->print("%s", current == VMThread::vm_thread() ? "=>" : " ");
a61af66fc99e Initial load
duke
parents:
diff changeset
4012
a61af66fc99e Initial load
duke
parents:
diff changeset
4013 st->print(PTR_FORMAT, VMThread::vm_thread());
a61af66fc99e Initial load
duke
parents:
diff changeset
4014 st->print(" ");
a61af66fc99e Initial load
duke
parents:
diff changeset
4015 VMThread::vm_thread()->print_on_error(st, buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
4016 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
4017 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4018 WatcherThread* wt = WatcherThread::watcher_thread();
a61af66fc99e Initial load
duke
parents:
diff changeset
4019 if (wt != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4020 bool is_current = (current == wt);
a61af66fc99e Initial load
duke
parents:
diff changeset
4021 found_current = found_current || is_current;
a61af66fc99e Initial load
duke
parents:
diff changeset
4022 st->print("%s", is_current ? "=>" : " ");
a61af66fc99e Initial load
duke
parents:
diff changeset
4023
a61af66fc99e Initial load
duke
parents:
diff changeset
4024 st->print(PTR_FORMAT, wt);
a61af66fc99e Initial load
duke
parents:
diff changeset
4025 st->print(" ");
a61af66fc99e Initial load
duke
parents:
diff changeset
4026 wt->print_on_error(st, buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
4027 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
4028 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4029 if (!found_current) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4030 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
4031 st->print("=>" PTR_FORMAT " (exited) ", current);
a61af66fc99e Initial load
duke
parents:
diff changeset
4032 current->print_on_error(st, buf, buflen);
a61af66fc99e Initial load
duke
parents:
diff changeset
4033 st->cr();
a61af66fc99e Initial load
duke
parents:
diff changeset
4034 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4035 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4036
1878
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4037 // Internal SpinLock and Mutex
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4038 // Based on ParkEvent
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4039
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4040 // Ad-hoc mutual exclusion primitives: SpinLock and Mux
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4041 //
1878
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4042 // We employ SpinLocks _only for low-contention, fixed-length
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4043 // short-duration critical sections where we're concerned
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4044 // about native mutex_t or HotSpot Mutex:: latency.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4045 // The mux construct provides a spin-then-block mutual exclusion
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4046 // mechanism.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4047 //
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4048 // Testing has shown that contention on the ListLock guarding gFreeList
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4049 // is common. If we implement ListLock as a simple SpinLock it's common
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4050 // for the JVM to devolve to yielding with little progress. This is true
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4051 // despite the fact that the critical sections protected by ListLock are
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4052 // extremely short.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4053 //
1878
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4054 // TODO-FIXME: ListLock should be of type SpinLock.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4055 // We should make this a 1st-class type, integrated into the lock
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4056 // hierarchy as leaf-locks. Critically, the SpinLock structure
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4057 // should have sufficient padding to avoid false-sharing and excessive
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4058 // cache-coherency traffic.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4059
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4060
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4061 typedef volatile int SpinLockT ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4062
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4063 void Thread::SpinAcquire (volatile int * adr, const char * LockName) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4064 if (Atomic::cmpxchg (1, adr, 0) == 0) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4065 return ; // normal fast-path return
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4066 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4067
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4068 // Slow-path : We've encountered contention -- Spin/Yield/Block strategy.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4069 TEVENT (SpinAcquire - ctx) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4070 int ctr = 0 ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4071 int Yields = 0 ;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4072 for (;;) {
1878
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4073 while (*adr != 0) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4074 ++ctr ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4075 if ((ctr & 0xFFF) == 0 || !os::is_MP()) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4076 if (Yields > 5) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4077 // Consider using a simple NakedSleep() instead.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4078 // Then SpinAcquire could be called by non-JVM threads
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4079 Thread::current()->_ParkEvent->park(1) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4080 } else {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4081 os::NakedYield() ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4082 ++Yields ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4083 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4084 } else {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4085 SpinPause() ;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4086 }
1878
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4087 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4088 if (Atomic::cmpxchg (1, adr, 0) == 0) return ;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4089 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4090 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4091
1878
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4092 void Thread::SpinRelease (volatile int * adr) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4093 assert (*adr != 0, "invariant") ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4094 OrderAccess::fence() ; // guarantee at least release consistency.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4095 // Roach-motel semantics.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4096 // It's safe if subsequent LDs and STs float "up" into the critical section,
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4097 // but prior LDs and STs within the critical section can't be allowed
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4098 // to reorder or float past the ST that releases the lock.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4099 *adr = 0 ;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4100 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4101
1878
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4102 // muxAcquire and muxRelease:
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4103 //
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4104 // * muxAcquire and muxRelease support a single-word lock-word construct.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4105 // The LSB of the word is set IFF the lock is held.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4106 // The remainder of the word points to the head of a singly-linked list
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4107 // of threads blocked on the lock.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4108 //
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4109 // * The current implementation of muxAcquire-muxRelease uses its own
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4110 // dedicated Thread._MuxEvent instance. If we're interested in
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4111 // minimizing the peak number of extant ParkEvent instances then
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4112 // we could eliminate _MuxEvent and "borrow" _ParkEvent as long
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4113 // as certain invariants were satisfied. Specifically, care would need
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4114 // to be taken with regards to consuming unpark() "permits".
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4115 // A safe rule of thumb is that a thread would never call muxAcquire()
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4116 // if it's enqueued (cxq, EntryList, WaitList, etc) and will subsequently
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4117 // park(). Otherwise the _ParkEvent park() operation in muxAcquire() could
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4118 // consume an unpark() permit intended for monitorenter, for instance.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4119 // One way around this would be to widen the restricted-range semaphore
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4120 // implemented in park(). Another alternative would be to provide
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4121 // multiple instances of the PlatformEvent() for each thread. One
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4122 // instance would be dedicated to muxAcquire-muxRelease, for instance.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4123 //
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4124 // * Usage:
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4125 // -- Only as leaf locks
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4126 // -- for short-term locking only as muxAcquire does not perform
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4127 // thread state transitions.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4128 //
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4129 // Alternatives:
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4130 // * We could implement muxAcquire and muxRelease with MCS or CLH locks
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4131 // but with parking or spin-then-park instead of pure spinning.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4132 // * Use Taura-Oyama-Yonenzawa locks.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4133 // * It's possible to construct a 1-0 lock if we encode the lockword as
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4134 // (List,LockByte). Acquire will CAS the full lockword while Release
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4135 // will STB 0 into the LockByte. The 1-0 scheme admits stranding, so
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4136 // acquiring threads use timers (ParkTimed) to detect and recover from
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4137 // the stranding window. Thread/Node structures must be aligned on 256-byte
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4138 // boundaries by using placement-new.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4139 // * Augment MCS with advisory back-link fields maintained with CAS().
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4140 // Pictorially: LockWord -> T1 <-> T2 <-> T3 <-> ... <-> Tn <-> Owner.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4141 // The validity of the backlinks must be ratified before we trust the value.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4142 // If the backlinks are invalid the exiting thread must back-track through the
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4143 // the forward links, which are always trustworthy.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4144 // * Add a successor indication. The LockWord is currently encoded as
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4145 // (List, LOCKBIT:1). We could also add a SUCCBIT or an explicit _succ variable
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4146 // to provide the usual futile-wakeup optimization.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4147 // See RTStt for details.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4148 // * Consider schedctl.sc_nopreempt to cover the critical section.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4149 //
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4150
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4151
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4152 typedef volatile intptr_t MutexT ; // Mux Lock-word
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4153 enum MuxBits { LOCKBIT = 1 } ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4154
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4155 void Thread::muxAcquire (volatile intptr_t * Lock, const char * LockName) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4156 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4157 if (w == 0) return ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4158 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4159 return ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4160 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4161
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4162 TEVENT (muxAcquire - Contention) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4163 ParkEvent * const Self = Thread::current()->_MuxEvent ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4164 assert ((intptr_t(Self) & LOCKBIT) == 0, "invariant") ;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4165 for (;;) {
1878
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4166 int its = (os::is_MP() ? 100 : 0) + 1 ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4167
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4168 // Optional spin phase: spin-then-park strategy
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4169 while (--its >= 0) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4170 w = *Lock ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4171 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4172 return ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4173 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4174 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4175
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4176 Self->reset() ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4177 Self->OnList = intptr_t(Lock) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4178 // The following fence() isn't _strictly necessary as the subsequent
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4179 // CAS() both serializes execution and ratifies the fetched *Lock value.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4180 OrderAccess::fence();
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4181 for (;;) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4182 w = *Lock ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4183 if ((w & LOCKBIT) == 0) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4184 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4185 Self->OnList = 0 ; // hygiene - allows stronger asserts
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4186 return ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4187 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4188 continue ; // Interference -- *Lock changed -- Just retry
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4189 }
1878
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4190 assert (w & LOCKBIT, "invariant") ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4191 Self->ListNext = (ParkEvent *) (w & ~LOCKBIT );
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4192 if (Atomic::cmpxchg_ptr (intptr_t(Self)|LOCKBIT, Lock, w) == w) break ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4193 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4194
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4195 while (Self->OnList != 0) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4196 Self->park() ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4197 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4198 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4199 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4200
1878
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4201 void Thread::muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4202 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4203 if (w == 0) return ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4204 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4205 return ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4206 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4207
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4208 TEVENT (muxAcquire - Contention) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4209 ParkEvent * ReleaseAfter = NULL ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4210 if (ev == NULL) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4211 ev = ReleaseAfter = ParkEvent::Allocate (NULL) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4212 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4213 assert ((intptr_t(ev) & LOCKBIT) == 0, "invariant") ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4214 for (;;) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4215 guarantee (ev->OnList == 0, "invariant") ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4216 int its = (os::is_MP() ? 100 : 0) + 1 ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4217
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4218 // Optional spin phase: spin-then-park strategy
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4219 while (--its >= 0) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4220 w = *Lock ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4221 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4222 if (ReleaseAfter != NULL) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4223 ParkEvent::Release (ReleaseAfter) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4224 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4225 return ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4226 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4227 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4228
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4229 ev->reset() ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4230 ev->OnList = intptr_t(Lock) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4231 // The following fence() isn't _strictly necessary as the subsequent
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4232 // CAS() both serializes execution and ratifies the fetched *Lock value.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4233 OrderAccess::fence();
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4234 for (;;) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4235 w = *Lock ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4236 if ((w & LOCKBIT) == 0) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4237 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4238 ev->OnList = 0 ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4239 // We call ::Release while holding the outer lock, thus
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4240 // artificially lengthening the critical section.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4241 // Consider deferring the ::Release() until the subsequent unlock(),
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4242 // after we've dropped the outer lock.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4243 if (ReleaseAfter != NULL) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4244 ParkEvent::Release (ReleaseAfter) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4245 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4246 return ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4247 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4248 continue ; // Interference -- *Lock changed -- Just retry
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4249 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4250 assert (w & LOCKBIT, "invariant") ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4251 ev->ListNext = (ParkEvent *) (w & ~LOCKBIT );
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4252 if (Atomic::cmpxchg_ptr (intptr_t(ev)|LOCKBIT, Lock, w) == w) break ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4253 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4254
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4255 while (ev->OnList != 0) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4256 ev->park() ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4257 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4258 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4259 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4260
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4261 // Release() must extract a successor from the list and then wake that thread.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4262 // It can "pop" the front of the list or use a detach-modify-reattach (DMR) scheme
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4263 // similar to that used by ParkEvent::Allocate() and ::Release(). DMR-based
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4264 // Release() would :
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4265 // (A) CAS() or swap() null to *Lock, releasing the lock and detaching the list.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4266 // (B) Extract a successor from the private list "in-hand"
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4267 // (C) attempt to CAS() the residual back into *Lock over null.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4268 // If there were any newly arrived threads and the CAS() would fail.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4269 // In that case Release() would detach the RATs, re-merge the list in-hand
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4270 // with the RATs and repeat as needed. Alternately, Release() might
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4271 // detach and extract a successor, but then pass the residual list to the wakee.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4272 // The wakee would be responsible for reattaching and remerging before it
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4273 // competed for the lock.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4274 //
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4275 // Both "pop" and DMR are immune from ABA corruption -- there can be
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4276 // multiple concurrent pushers, but only one popper or detacher.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4277 // This implementation pops from the head of the list. This is unfair,
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4278 // but tends to provide excellent throughput as hot threads remain hot.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4279 // (We wake recently run threads first).
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4280
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4281 void Thread::muxRelease (volatile intptr_t * Lock) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4282 for (;;) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4283 const intptr_t w = Atomic::cmpxchg_ptr (0, Lock, LOCKBIT) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4284 assert (w & LOCKBIT, "invariant") ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4285 if (w == LOCKBIT) return ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4286 ParkEvent * List = (ParkEvent *) (w & ~LOCKBIT) ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4287 assert (List != NULL, "invariant") ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4288 assert (List->OnList == intptr_t(Lock), "invariant") ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4289 ParkEvent * nxt = List->ListNext ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4290
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4291 // The following CAS() releases the lock and pops the head element.
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4292 if (Atomic::cmpxchg_ptr (intptr_t(nxt), Lock, w) != w) {
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4293 continue ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4294 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4295 List->OnList = 0 ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4296 OrderAccess::fence() ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4297 List->unpark () ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4298 return ;
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4299 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4300 }
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4301
fa83ab460c54 6988353: refactor contended sync subsystem
acorn
parents: 1871
diff changeset
4302
0
a61af66fc99e Initial load
duke
parents:
diff changeset
4303 void Threads::verify() {
a61af66fc99e Initial load
duke
parents:
diff changeset
4304 ALL_JAVA_THREADS(p) {
a61af66fc99e Initial load
duke
parents:
diff changeset
4305 p->verify();
a61af66fc99e Initial load
duke
parents:
diff changeset
4306 }
a61af66fc99e Initial load
duke
parents:
diff changeset
4307 VMThread* thread = VMThread::vm_thread();
a61af66fc99e Initial load
duke
parents:
diff changeset
4308 if (thread != NULL) thread->verify();
a61af66fc99e Initial load
duke
parents:
diff changeset
4309 }