author | stefank |
Tue, 27 Nov 2012 14:20:21 +0100 | |
changeset 14583 | d70ee55535f4 |
parent 14582 | 490bb6c0df7c |
child 14633 | 58caa6fc3b7c |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
|
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
|
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
7397 | 25 |
#include "precompiled.hpp" |
26 |
#include "classfile/classLoader.hpp" |
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#include "classfile/javaClasses.hpp" |
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#include "classfile/systemDictionary.hpp" |
|
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#include "classfile/vmSymbols.hpp" |
|
30 |
#include "code/scopeDesc.hpp" |
|
31 |
#include "compiler/compileBroker.hpp" |
|
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#include "interpreter/interpreter.hpp" |
|
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#include "interpreter/linkResolver.hpp" |
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#include "interpreter/oopMapCache.hpp" |
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#include "jvmtifiles/jvmtiEnv.hpp" |
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#include "memory/gcLocker.inline.hpp" |
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#include "memory/metaspaceShared.hpp" |
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#include "memory/oopFactory.hpp" |
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#include "memory/universe.inline.hpp" |
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#include "oops/instanceKlass.hpp" |
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#include "oops/objArrayOop.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "oops/symbol.hpp" |
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#include "prims/jvm_misc.hpp" |
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#include "prims/jvmtiExport.hpp" |
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#include "prims/jvmtiThreadState.hpp" |
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#include "prims/privilegedStack.hpp" |
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#include "runtime/aprofiler.hpp" |
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#include "runtime/arguments.hpp" |
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#include "runtime/biasedLocking.hpp" |
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#include "runtime/deoptimization.hpp" |
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#include "runtime/fprofiler.hpp" |
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#include "runtime/frame.inline.hpp" |
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#include "runtime/init.hpp" |
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#include "runtime/interfaceSupport.hpp" |
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#include "runtime/java.hpp" |
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#include "runtime/javaCalls.hpp" |
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#include "runtime/jniPeriodicChecker.hpp" |
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#include "runtime/memprofiler.hpp" |
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#include "runtime/mutexLocker.hpp" |
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#include "runtime/objectMonitor.hpp" |
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#include "runtime/osThread.hpp" |
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#include "runtime/safepoint.hpp" |
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#include "runtime/sharedRuntime.hpp" |
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#include "runtime/statSampler.hpp" |
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#include "runtime/stubRoutines.hpp" |
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#include "runtime/task.hpp" |
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#include "runtime/thread.inline.hpp" |
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#include "runtime/threadCritical.hpp" |
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#include "runtime/threadLocalStorage.hpp" |
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#include "runtime/vframe.hpp" |
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#include "runtime/vframeArray.hpp" |
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#include "runtime/vframe_hp.hpp" |
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#include "runtime/vmThread.hpp" |
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#include "runtime/vm_operations.hpp" |
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#include "services/attachListener.hpp" |
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#include "services/management.hpp" |
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#include "services/memTracker.hpp" |
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#include "services/threadService.hpp" |
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#include "trace/traceEventTypes.hpp" |
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#include "utilities/defaultStream.hpp" |
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#include "utilities/dtrace.hpp" |
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#include "utilities/events.hpp" |
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#include "utilities/preserveException.hpp" |
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#ifdef TARGET_OS_FAMILY_linux |
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# include "os_linux.inline.hpp" |
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#endif |
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#ifdef TARGET_OS_FAMILY_solaris |
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# include "os_solaris.inline.hpp" |
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#endif |
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#ifdef TARGET_OS_FAMILY_windows |
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# include "os_windows.inline.hpp" |
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93 |
#endif |
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#ifdef TARGET_OS_FAMILY_bsd |
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# include "os_bsd.inline.hpp" |
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96 |
#endif |
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#ifndef SERIALGC |
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#include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" |
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#include "gc_implementation/g1/concurrentMarkThread.inline.hpp" |
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#include "gc_implementation/parallelScavenge/pcTasks.hpp" |
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101 |
#endif |
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102 |
#ifdef COMPILER1 |
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#include "c1/c1_Compiler.hpp" |
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104 |
#endif |
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105 |
#ifdef COMPILER2 |
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#include "opto/c2compiler.hpp" |
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#include "opto/idealGraphPrinter.hpp" |
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108 |
#endif |
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110 |
#ifdef DTRACE_ENABLED |
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111 |
||
112 |
// Only bother with this argument setup if dtrace is available |
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113 |
||
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#ifndef USDT2 |
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HS_DTRACE_PROBE_DECL(hotspot, vm__init__begin); |
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HS_DTRACE_PROBE_DECL(hotspot, vm__init__end); |
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HS_DTRACE_PROBE_DECL5(hotspot, thread__start, char*, intptr_t, |
|
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intptr_t, intptr_t, bool); |
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HS_DTRACE_PROBE_DECL5(hotspot, thread__stop, char*, intptr_t, |
|
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intptr_t, intptr_t, bool); |
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||
122 |
#define DTRACE_THREAD_PROBE(probe, javathread) \ |
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{ \ |
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ResourceMark rm(this); \ |
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125 |
int len = 0; \ |
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126 |
const char* name = (javathread)->get_thread_name(); \ |
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len = strlen(name); \ |
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128 |
HS_DTRACE_PROBE5(hotspot, thread__##probe, \ |
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name, len, \ |
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java_lang_Thread::thread_id((javathread)->threadObj()), \ |
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(javathread)->osthread()->thread_id(), \ |
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java_lang_Thread::is_daemon((javathread)->threadObj())); \ |
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} |
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||
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#else /* USDT2 */ |
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||
137 |
#define HOTSPOT_THREAD_PROBE_start HOTSPOT_THREAD_PROBE_START |
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138 |
#define HOTSPOT_THREAD_PROBE_stop HOTSPOT_THREAD_PROBE_STOP |
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||
140 |
#define DTRACE_THREAD_PROBE(probe, javathread) \ |
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{ \ |
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ResourceMark rm(this); \ |
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143 |
int len = 0; \ |
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144 |
const char* name = (javathread)->get_thread_name(); \ |
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len = strlen(name); \ |
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HOTSPOT_THREAD_PROBE_##probe( /* probe = start, stop */ \ |
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(char *) name, len, \ |
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java_lang_Thread::thread_id((javathread)->threadObj()), \ |
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(uintptr_t) (javathread)->osthread()->thread_id(), \ |
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java_lang_Thread::is_daemon((javathread)->threadObj())); \ |
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} |
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152 |
||
153 |
#endif /* USDT2 */ |
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154 |
||
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#else // ndef DTRACE_ENABLED |
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||
157 |
#define DTRACE_THREAD_PROBE(probe, javathread) |
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158 |
||
159 |
#endif // ndef DTRACE_ENABLED |
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||
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|
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// Class hierarchy |
163 |
// - Thread |
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164 |
// - VMThread |
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165 |
// - WatcherThread |
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// - ConcurrentMarkSweepThread |
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// - JavaThread |
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168 |
// - CompilerThread |
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169 |
||
170 |
// ======= Thread ======== |
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171 |
// Support for forcing alignment of thread objects for biased locking |
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13195 | 172 |
void* Thread::allocate(size_t size, bool throw_excpt, MEMFLAGS flags) { |
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if (UseBiasedLocking) { |
174 |
const int alignment = markOopDesc::biased_lock_alignment; |
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175 |
size_t aligned_size = size + (alignment - sizeof(intptr_t)); |
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void* real_malloc_addr = throw_excpt? AllocateHeap(aligned_size, flags, CURRENT_PC) |
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: AllocateHeap(aligned_size, flags, CURRENT_PC, |
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AllocFailStrategy::RETURN_NULL); |
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void* aligned_addr = (void*) align_size_up((intptr_t) real_malloc_addr, alignment); |
180 |
assert(((uintptr_t) aligned_addr + (uintptr_t) size) <= |
|
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((uintptr_t) real_malloc_addr + (uintptr_t) aligned_size), |
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"JavaThread alignment code overflowed allocated storage"); |
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183 |
if (TraceBiasedLocking) { |
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184 |
if (aligned_addr != real_malloc_addr) |
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185 |
tty->print_cr("Aligned thread " INTPTR_FORMAT " to " INTPTR_FORMAT, |
|
186 |
real_malloc_addr, aligned_addr); |
|
187 |
} |
|
188 |
((Thread*) aligned_addr)->_real_malloc_address = real_malloc_addr; |
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189 |
return aligned_addr; |
|
190 |
} else { |
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return throw_excpt? AllocateHeap(size, flags, CURRENT_PC) |
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: AllocateHeap(size, flags, CURRENT_PC, AllocFailStrategy::RETURN_NULL); |
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} |
194 |
} |
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195 |
||
196 |
void Thread::operator delete(void* p) { |
|
197 |
if (UseBiasedLocking) { |
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198 |
void* real_malloc_addr = ((Thread*) p)->_real_malloc_address; |
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13195 | 199 |
FreeHeap(real_malloc_addr, mtThread); |
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} else { |
13195 | 201 |
FreeHeap(p, mtThread); |
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} |
203 |
} |
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204 |
||
205 |
||
206 |
// Base class for all threads: VMThread, WatcherThread, ConcurrentMarkSweepThread, |
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// JavaThread |
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208 |
||
209 |
||
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Thread::Thread() { |
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// stack and get_thread |
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set_stack_base(NULL); |
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set_stack_size(0); |
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set_self_raw_id(0); |
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set_lgrp_id(-1); |
1 | 216 |
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// allocated data structures |
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set_osthread(NULL); |
13195 | 219 |
set_resource_area(new (mtThread)ResourceArea()); |
220 |
set_handle_area(new (mtThread) HandleArea(NULL)); |
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set_metadata_handles(new (ResourceObj::C_HEAP, mtClass) GrowableArray<Metadata*>(300, true)); |
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set_active_handles(NULL); |
223 |
set_free_handle_block(NULL); |
|
224 |
set_last_handle_mark(NULL); |
|
225 |
||
226 |
// This initial value ==> never claimed. |
|
227 |
_oops_do_parity = 0; |
|
228 |
||
229 |
// the handle mark links itself to last_handle_mark |
|
230 |
new HandleMark(this); |
|
231 |
||
232 |
// plain initialization |
|
233 |
debug_only(_owned_locks = NULL;) |
|
234 |
debug_only(_allow_allocation_count = 0;) |
|
235 |
NOT_PRODUCT(_allow_safepoint_count = 0;) |
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NOT_PRODUCT(_skip_gcalot = false;) |
1 | 237 |
CHECK_UNHANDLED_OOPS_ONLY(_gc_locked_out_count = 0;) |
238 |
_jvmti_env_iteration_count = 0; |
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set_allocated_bytes(0); |
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set_trace_buffer(NULL); |
1 | 241 |
_vm_operation_started_count = 0; |
242 |
_vm_operation_completed_count = 0; |
|
243 |
_current_pending_monitor = NULL; |
|
244 |
_current_pending_monitor_is_from_java = true; |
|
245 |
_current_waiting_monitor = NULL; |
|
246 |
_num_nested_signal = 0; |
|
247 |
omFreeList = NULL ; |
|
248 |
omFreeCount = 0 ; |
|
249 |
omFreeProvision = 32 ; |
|
5710 | 250 |
omInUseList = NULL ; |
251 |
omInUseCount = 0 ; |
|
1 | 252 |
|
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#ifdef ASSERT |
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_visited_for_critical_count = false; |
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#endif |
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256 |
|
1 | 257 |
_SR_lock = new Monitor(Mutex::suspend_resume, "SR_lock", true); |
258 |
_suspend_flags = 0; |
|
259 |
||
260 |
// thread-specific hashCode stream generator state - Marsaglia shift-xor form |
|
261 |
_hashStateX = os::random() ; |
|
262 |
_hashStateY = 842502087 ; |
|
263 |
_hashStateZ = 0x8767 ; // (int)(3579807591LL & 0xffff) ; |
|
264 |
_hashStateW = 273326509 ; |
|
265 |
||
266 |
_OnTrap = 0 ; |
|
267 |
_schedctl = NULL ; |
|
268 |
_Stalled = 0 ; |
|
269 |
_TypeTag = 0x2BAD ; |
|
270 |
||
271 |
// Many of the following fields are effectively final - immutable |
|
272 |
// Note that nascent threads can't use the Native Monitor-Mutex |
|
273 |
// construct until the _MutexEvent is initialized ... |
|
274 |
// CONSIDER: instead of using a fixed set of purpose-dedicated ParkEvents |
|
275 |
// we might instead use a stack of ParkEvents that we could provision on-demand. |
|
276 |
// The stack would act as a cache to avoid calls to ParkEvent::Allocate() |
|
277 |
// and ::Release() |
|
278 |
_ParkEvent = ParkEvent::Allocate (this) ; |
|
279 |
_SleepEvent = ParkEvent::Allocate (this) ; |
|
280 |
_MutexEvent = ParkEvent::Allocate (this) ; |
|
281 |
_MuxEvent = ParkEvent::Allocate (this) ; |
|
282 |
||
283 |
#ifdef CHECK_UNHANDLED_OOPS |
|
284 |
if (CheckUnhandledOops) { |
|
285 |
_unhandled_oops = new UnhandledOops(this); |
|
286 |
} |
|
287 |
#endif // CHECK_UNHANDLED_OOPS |
|
288 |
#ifdef ASSERT |
|
289 |
if (UseBiasedLocking) { |
|
290 |
assert((((uintptr_t) this) & (markOopDesc::biased_lock_alignment - 1)) == 0, "forced alignment of thread object failed"); |
|
291 |
assert(this == _real_malloc_address || |
|
292 |
this == (void*) align_size_up((intptr_t) _real_malloc_address, markOopDesc::biased_lock_alignment), |
|
293 |
"bug in forced alignment of thread objects"); |
|
294 |
} |
|
295 |
#endif /* ASSERT */ |
|
296 |
} |
|
297 |
||
298 |
void Thread::initialize_thread_local_storage() { |
|
299 |
// Note: Make sure this method only calls |
|
300 |
// non-blocking operations. Otherwise, it might not work |
|
301 |
// with the thread-startup/safepoint interaction. |
|
302 |
||
303 |
// During Java thread startup, safepoint code should allow this |
|
304 |
// method to complete because it may need to allocate memory to |
|
305 |
// store information for the new thread. |
|
306 |
||
307 |
// initialize structure dependent on thread local storage |
|
308 |
ThreadLocalStorage::set_thread(this); |
|
309 |
} |
|
310 |
||
311 |
void Thread::record_stack_base_and_size() { |
|
312 |
set_stack_base(os::current_stack_base()); |
|
313 |
set_stack_size(os::current_stack_size()); |
|
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// CR 7190089: on Solaris, primordial thread's stack is adjusted |
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315 |
// in initialize_thread(). Without the adjustment, stack size is |
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// incorrect if stack is set to unlimited (ulimit -s unlimited). |
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// So far, only Solaris has real implementation of initialize_thread(). |
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318 |
// |
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319 |
// set up any platform-specific state. |
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|
320 |
os::initialize_thread(this); |
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|
321 |
|
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#if INCLUDE_NMT |
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// record thread's native stack, stack grows downward |
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address stack_low_addr = stack_base() - stack_size(); |
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MemTracker::record_thread_stack(stack_low_addr, stack_size(), this, |
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326 |
CURRENT_PC); |
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327 |
#endif // INCLUDE_NMT |
1 | 328 |
} |
329 |
||
330 |
||
331 |
Thread::~Thread() { |
|
332 |
// Reclaim the objectmonitors from the omFreeList of the moribund thread. |
|
333 |
ObjectSynchronizer::omFlush (this) ; |
|
334 |
||
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// stack_base can be NULL if the thread is never started or exited before |
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// record_stack_base_and_size called. Although, we would like to ensure |
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// that all started threads do call record_stack_base_and_size(), there is |
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// not proper way to enforce that. |
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339 |
#if INCLUDE_NMT |
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340 |
if (_stack_base != NULL) { |
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address low_stack_addr = stack_base() - stack_size(); |
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MemTracker::release_thread_stack(low_stack_addr, stack_size(), this); |
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#ifdef ASSERT |
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set_stack_base(NULL); |
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345 |
#endif |
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346 |
} |
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347 |
#endif // INCLUDE_NMT |
13195 | 348 |
|
1 | 349 |
// deallocate data structures |
350 |
delete resource_area(); |
|
351 |
// since the handle marks are using the handle area, we have to deallocated the root |
|
352 |
// handle mark before deallocating the thread's handle area, |
|
353 |
assert(last_handle_mark() != NULL, "check we have an element"); |
|
354 |
delete last_handle_mark(); |
|
355 |
assert(last_handle_mark() == NULL, "check we have reached the end"); |
|
356 |
||
357 |
// It's possible we can encounter a null _ParkEvent, etc., in stillborn threads. |
|
358 |
// We NULL out the fields for good hygiene. |
|
359 |
ParkEvent::Release (_ParkEvent) ; _ParkEvent = NULL ; |
|
360 |
ParkEvent::Release (_SleepEvent) ; _SleepEvent = NULL ; |
|
361 |
ParkEvent::Release (_MutexEvent) ; _MutexEvent = NULL ; |
|
362 |
ParkEvent::Release (_MuxEvent) ; _MuxEvent = NULL ; |
|
363 |
||
364 |
delete handle_area(); |
|
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|
365 |
delete metadata_handles(); |
1 | 366 |
|
367 |
// osthread() can be NULL, if creation of thread failed. |
|
368 |
if (osthread() != NULL) os::free_thread(osthread()); |
|
369 |
||
370 |
delete _SR_lock; |
|
371 |
||
372 |
// clear thread local storage if the Thread is deleting itself |
|
373 |
if (this == Thread::current()) { |
|
374 |
ThreadLocalStorage::set_thread(NULL); |
|
375 |
} else { |
|
376 |
// In the case where we're not the current thread, invalidate all the |
|
377 |
// caches in case some code tries to get the current thread or the |
|
378 |
// thread that was destroyed, and gets stale information. |
|
379 |
ThreadLocalStorage::invalidate_all(); |
|
380 |
} |
|
381 |
CHECK_UNHANDLED_OOPS_ONLY(if (CheckUnhandledOops) delete unhandled_oops();) |
|
382 |
} |
|
383 |
||
384 |
// NOTE: dummy function for assertion purpose. |
|
385 |
void Thread::run() { |
|
386 |
ShouldNotReachHere(); |
|
387 |
} |
|
388 |
||
389 |
#ifdef ASSERT |
|
390 |
// Private method to check for dangling thread pointer |
|
391 |
void check_for_dangling_thread_pointer(Thread *thread) { |
|
392 |
assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), |
|
393 |
"possibility of dangling Thread pointer"); |
|
394 |
} |
|
395 |
#endif |
|
396 |
||
397 |
||
398 |
#ifndef PRODUCT |
|
399 |
// Tracing method for basic thread operations |
|
400 |
void Thread::trace(const char* msg, const Thread* const thread) { |
|
401 |
if (!TraceThreadEvents) return; |
|
402 |
ResourceMark rm; |
|
403 |
ThreadCritical tc; |
|
404 |
const char *name = "non-Java thread"; |
|
405 |
int prio = -1; |
|
406 |
if (thread->is_Java_thread() |
|
407 |
&& !thread->is_Compiler_thread()) { |
|
408 |
// The Threads_lock must be held to get information about |
|
409 |
// this thread but may not be in some situations when |
|
410 |
// tracing thread events. |
|
411 |
bool release_Threads_lock = false; |
|
412 |
if (!Threads_lock->owned_by_self()) { |
|
413 |
Threads_lock->lock(); |
|
414 |
release_Threads_lock = true; |
|
415 |
} |
|
416 |
JavaThread* jt = (JavaThread *)thread; |
|
417 |
name = (char *)jt->get_thread_name(); |
|
418 |
oop thread_oop = jt->threadObj(); |
|
419 |
if (thread_oop != NULL) { |
|
420 |
prio = java_lang_Thread::priority(thread_oop); |
|
421 |
} |
|
422 |
if (release_Threads_lock) { |
|
423 |
Threads_lock->unlock(); |
|
424 |
} |
|
425 |
} |
|
426 |
tty->print_cr("Thread::%s " INTPTR_FORMAT " [%lx] %s (prio: %d)", msg, thread, thread->osthread()->thread_id(), name, prio); |
|
427 |
} |
|
428 |
#endif |
|
429 |
||
430 |
||
431 |
ThreadPriority Thread::get_priority(const Thread* const thread) { |
|
432 |
trace("get priority", thread); |
|
433 |
ThreadPriority priority; |
|
434 |
// Can return an error! |
|
435 |
(void)os::get_priority(thread, priority); |
|
436 |
assert(MinPriority <= priority && priority <= MaxPriority, "non-Java priority found"); |
|
437 |
return priority; |
|
438 |
} |
|
439 |
||
440 |
void Thread::set_priority(Thread* thread, ThreadPriority priority) { |
|
441 |
trace("set priority", thread); |
|
442 |
debug_only(check_for_dangling_thread_pointer(thread);) |
|
443 |
// Can return an error! |
|
444 |
(void)os::set_priority(thread, priority); |
|
445 |
} |
|
446 |
||
447 |
||
448 |
void Thread::start(Thread* thread) { |
|
449 |
trace("start", thread); |
|
450 |
// Start is different from resume in that its safety is guaranteed by context or |
|
451 |
// being called from a Java method synchronized on the Thread object. |
|
452 |
if (!DisableStartThread) { |
|
453 |
if (thread->is_Java_thread()) { |
|
454 |
// Initialize the thread state to RUNNABLE before starting this thread. |
|
455 |
// Can not set it after the thread started because we do not know the |
|
456 |
// exact thread state at that time. It could be in MONITOR_WAIT or |
|
457 |
// in SLEEPING or some other state. |
|
458 |
java_lang_Thread::set_thread_status(((JavaThread*)thread)->threadObj(), |
|
459 |
java_lang_Thread::RUNNABLE); |
|
460 |
} |
|
461 |
os::start_thread(thread); |
|
462 |
} |
|
463 |
} |
|
464 |
||
465 |
// Enqueue a VM_Operation to do the job for us - sometime later |
|
466 |
void Thread::send_async_exception(oop java_thread, oop java_throwable) { |
|
467 |
VM_ThreadStop* vm_stop = new VM_ThreadStop(java_thread, java_throwable); |
|
468 |
VMThread::execute(vm_stop); |
|
469 |
} |
|
470 |
||
471 |
||
472 |
// |
|
473 |
// Check if an external suspend request has completed (or has been |
|
474 |
// cancelled). Returns true if the thread is externally suspended and |
|
475 |
// false otherwise. |
|
476 |
// |
|
477 |
// The bits parameter returns information about the code path through |
|
478 |
// the routine. Useful for debugging: |
|
479 |
// |
|
480 |
// set in is_ext_suspend_completed(): |
|
481 |
// 0x00000001 - routine was entered |
|
482 |
// 0x00000010 - routine return false at end |
|
483 |
// 0x00000100 - thread exited (return false) |
|
484 |
// 0x00000200 - suspend request cancelled (return false) |
|
485 |
// 0x00000400 - thread suspended (return true) |
|
486 |
// 0x00001000 - thread is in a suspend equivalent state (return true) |
|
487 |
// 0x00002000 - thread is native and walkable (return true) |
|
488 |
// 0x00004000 - thread is native_trans and walkable (needed retry) |
|
489 |
// |
|
490 |
// set in wait_for_ext_suspend_completion(): |
|
491 |
// 0x00010000 - routine was entered |
|
492 |
// 0x00020000 - suspend request cancelled before loop (return false) |
|
493 |
// 0x00040000 - thread suspended before loop (return true) |
|
494 |
// 0x00080000 - suspend request cancelled in loop (return false) |
|
495 |
// 0x00100000 - thread suspended in loop (return true) |
|
496 |
// 0x00200000 - suspend not completed during retry loop (return false) |
|
497 |
// |
|
498 |
||
499 |
// Helper class for tracing suspend wait debug bits. |
|
500 |
// |
|
501 |
// 0x00000100 indicates that the target thread exited before it could |
|
502 |
// self-suspend which is not a wait failure. 0x00000200, 0x00020000 and |
|
503 |
// 0x00080000 each indicate a cancelled suspend request so they don't |
|
504 |
// count as wait failures either. |
|
505 |
#define DEBUG_FALSE_BITS (0x00000010 | 0x00200000) |
|
506 |
||
507 |
class TraceSuspendDebugBits : public StackObj { |
|
508 |
private: |
|
509 |
JavaThread * jt; |
|
510 |
bool is_wait; |
|
511 |
bool called_by_wait; // meaningful when !is_wait |
|
512 |
uint32_t * bits; |
|
513 |
||
514 |
public: |
|
515 |
TraceSuspendDebugBits(JavaThread *_jt, bool _is_wait, bool _called_by_wait, |
|
516 |
uint32_t *_bits) { |
|
517 |
jt = _jt; |
|
518 |
is_wait = _is_wait; |
|
519 |
called_by_wait = _called_by_wait; |
|
520 |
bits = _bits; |
|
521 |
} |
|
522 |
||
523 |
~TraceSuspendDebugBits() { |
|
524 |
if (!is_wait) { |
|
525 |
#if 1 |
|
526 |
// By default, don't trace bits for is_ext_suspend_completed() calls. |
|
527 |
// That trace is very chatty. |
|
528 |
return; |
|
529 |
#else |
|
530 |
if (!called_by_wait) { |
|
531 |
// If tracing for is_ext_suspend_completed() is enabled, then only |
|
532 |
// trace calls to it from wait_for_ext_suspend_completion() |
|
533 |
return; |
|
534 |
} |
|
535 |
#endif |
|
536 |
} |
|
537 |
||
538 |
if (AssertOnSuspendWaitFailure || TraceSuspendWaitFailures) { |
|
539 |
if (bits != NULL && (*bits & DEBUG_FALSE_BITS) != 0) { |
|
540 |
MutexLocker ml(Threads_lock); // needed for get_thread_name() |
|
541 |
ResourceMark rm; |
|
542 |
||
543 |
tty->print_cr( |
|
544 |
"Failed wait_for_ext_suspend_completion(thread=%s, debug_bits=%x)", |
|
545 |
jt->get_thread_name(), *bits); |
|
546 |
||
547 |
guarantee(!AssertOnSuspendWaitFailure, "external suspend wait failed"); |
|
548 |
} |
|
549 |
} |
|
550 |
} |
|
551 |
}; |
|
552 |
#undef DEBUG_FALSE_BITS |
|
553 |
||
554 |
||
555 |
bool JavaThread::is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits) { |
|
556 |
TraceSuspendDebugBits tsdb(this, false /* !is_wait */, called_by_wait, bits); |
|
557 |
||
558 |
bool did_trans_retry = false; // only do thread_in_native_trans retry once |
|
559 |
bool do_trans_retry; // flag to force the retry |
|
560 |
||
561 |
*bits |= 0x00000001; |
|
562 |
||
563 |
do { |
|
564 |
do_trans_retry = false; |
|
565 |
||
566 |
if (is_exiting()) { |
|
567 |
// Thread is in the process of exiting. This is always checked |
|
568 |
// first to reduce the risk of dereferencing a freed JavaThread. |
|
569 |
*bits |= 0x00000100; |
|
570 |
return false; |
|
571 |
} |
|
572 |
||
573 |
if (!is_external_suspend()) { |
|
574 |
// Suspend request is cancelled. This is always checked before |
|
575 |
// is_ext_suspended() to reduce the risk of a rogue resume |
|
576 |
// confusing the thread that made the suspend request. |
|
577 |
*bits |= 0x00000200; |
|
578 |
return false; |
|
579 |
} |
|
580 |
||
581 |
if (is_ext_suspended()) { |
|
582 |
// thread is suspended |
|
583 |
*bits |= 0x00000400; |
|
584 |
return true; |
|
585 |
} |
|
586 |
||
587 |
// Now that we no longer do hard suspends of threads running |
|
588 |
// native code, the target thread can be changing thread state |
|
589 |
// while we are in this routine: |
|
590 |
// |
|
591 |
// _thread_in_native -> _thread_in_native_trans -> _thread_blocked |
|
592 |
// |
|
593 |
// We save a copy of the thread state as observed at this moment |
|
594 |
// and make our decision about suspend completeness based on the |
|
595 |
// copy. This closes the race where the thread state is seen as |
|
596 |
// _thread_in_native_trans in the if-thread_blocked check, but is |
|
597 |
// seen as _thread_blocked in if-thread_in_native_trans check. |
|
598 |
JavaThreadState save_state = thread_state(); |
|
599 |
||
600 |
if (save_state == _thread_blocked && is_suspend_equivalent()) { |
|
601 |
// If the thread's state is _thread_blocked and this blocking |
|
602 |
// condition is known to be equivalent to a suspend, then we can |
|
603 |
// consider the thread to be externally suspended. This means that |
|
604 |
// the code that sets _thread_blocked has been modified to do |
|
605 |
// self-suspension if the blocking condition releases. We also |
|
606 |
// used to check for CONDVAR_WAIT here, but that is now covered by |
|
607 |
// the _thread_blocked with self-suspension check. |
|
608 |
// |
|
609 |
// Return true since we wouldn't be here unless there was still an |
|
610 |
// external suspend request. |
|
611 |
*bits |= 0x00001000; |
|
612 |
return true; |
|
613 |
} else if (save_state == _thread_in_native && frame_anchor()->walkable()) { |
|
614 |
// Threads running native code will self-suspend on native==>VM/Java |
|
615 |
// transitions. If its stack is walkable (should always be the case |
|
616 |
// unless this function is called before the actual java_suspend() |
|
617 |
// call), then the wait is done. |
|
618 |
*bits |= 0x00002000; |
|
619 |
return true; |
|
620 |
} else if (!called_by_wait && !did_trans_retry && |
|
621 |
save_state == _thread_in_native_trans && |
|
622 |
frame_anchor()->walkable()) { |
|
623 |
// The thread is transitioning from thread_in_native to another |
|
624 |
// thread state. check_safepoint_and_suspend_for_native_trans() |
|
625 |
// will force the thread to self-suspend. If it hasn't gotten |
|
626 |
// there yet we may have caught the thread in-between the native |
|
627 |
// code check above and the self-suspend. Lucky us. If we were |
|
628 |
// called by wait_for_ext_suspend_completion(), then it |
|
629 |
// will be doing the retries so we don't have to. |
|
630 |
// |
|
631 |
// Since we use the saved thread state in the if-statement above, |
|
632 |
// there is a chance that the thread has already transitioned to |
|
633 |
// _thread_blocked by the time we get here. In that case, we will |
|
634 |
// make a single unnecessary pass through the logic below. This |
|
635 |
// doesn't hurt anything since we still do the trans retry. |
|
636 |
||
637 |
*bits |= 0x00004000; |
|
638 |
||
639 |
// Once the thread leaves thread_in_native_trans for another |
|
640 |
// thread state, we break out of this retry loop. We shouldn't |
|
641 |
// need this flag to prevent us from getting back here, but |
|
642 |
// sometimes paranoia is good. |
|
643 |
did_trans_retry = true; |
|
644 |
||
645 |
// We wait for the thread to transition to a more usable state. |
|
646 |
for (int i = 1; i <= SuspendRetryCount; i++) { |
|
647 |
// We used to do an "os::yield_all(i)" call here with the intention |
|
648 |
// that yielding would increase on each retry. However, the parameter |
|
649 |
// is ignored on Linux which means the yield didn't scale up. Waiting |
|
650 |
// on the SR_lock below provides a much more predictable scale up for |
|
651 |
// the delay. It also provides a simple/direct point to check for any |
|
652 |
// safepoint requests from the VMThread |
|
653 |
||
654 |
// temporarily drops SR_lock while doing wait with safepoint check |
|
655 |
// (if we're a JavaThread - the WatcherThread can also call this) |
|
656 |
// and increase delay with each retry |
|
657 |
SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); |
|
658 |
||
659 |
// check the actual thread state instead of what we saved above |
|
660 |
if (thread_state() != _thread_in_native_trans) { |
|
661 |
// the thread has transitioned to another thread state so |
|
662 |
// try all the checks (except this one) one more time. |
|
663 |
do_trans_retry = true; |
|
664 |
break; |
|
665 |
} |
|
666 |
} // end retry loop |
|
667 |
||
668 |
||
669 |
} |
|
670 |
} while (do_trans_retry); |
|
671 |
||
672 |
*bits |= 0x00000010; |
|
673 |
return false; |
|
674 |
} |
|
675 |
||
676 |
// |
|
677 |
// Wait for an external suspend request to complete (or be cancelled). |
|
678 |
// Returns true if the thread is externally suspended and false otherwise. |
|
679 |
// |
|
680 |
bool JavaThread::wait_for_ext_suspend_completion(int retries, int delay, |
|
681 |
uint32_t *bits) { |
|
682 |
TraceSuspendDebugBits tsdb(this, true /* is_wait */, |
|
683 |
false /* !called_by_wait */, bits); |
|
684 |
||
685 |
// local flag copies to minimize SR_lock hold time |
|
686 |
bool is_suspended; |
|
687 |
bool pending; |
|
688 |
uint32_t reset_bits; |
|
689 |
||
690 |
// set a marker so is_ext_suspend_completed() knows we are the caller |
|
691 |
*bits |= 0x00010000; |
|
692 |
||
693 |
// We use reset_bits to reinitialize the bits value at the top of |
|
694 |
// each retry loop. This allows the caller to make use of any |
|
695 |
// unused bits for their own marking purposes. |
|
696 |
reset_bits = *bits; |
|
697 |
||
698 |
{ |
|
699 |
MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); |
|
700 |
is_suspended = is_ext_suspend_completed(true /* called_by_wait */, |
|
701 |
delay, bits); |
|
702 |
pending = is_external_suspend(); |
|
703 |
} |
|
704 |
// must release SR_lock to allow suspension to complete |
|
705 |
||
706 |
if (!pending) { |
|
707 |
// A cancelled suspend request is the only false return from |
|
708 |
// is_ext_suspend_completed() that keeps us from entering the |
|
709 |
// retry loop. |
|
710 |
*bits |= 0x00020000; |
|
711 |
return false; |
|
712 |
} |
|
713 |
||
714 |
if (is_suspended) { |
|
715 |
*bits |= 0x00040000; |
|
716 |
return true; |
|
717 |
} |
|
718 |
||
719 |
for (int i = 1; i <= retries; i++) { |
|
720 |
*bits = reset_bits; // reinit to only track last retry |
|
721 |
||
722 |
// We used to do an "os::yield_all(i)" call here with the intention |
|
723 |
// that yielding would increase on each retry. However, the parameter |
|
724 |
// is ignored on Linux which means the yield didn't scale up. Waiting |
|
725 |
// on the SR_lock below provides a much more predictable scale up for |
|
726 |
// the delay. It also provides a simple/direct point to check for any |
|
727 |
// safepoint requests from the VMThread |
|
728 |
||
729 |
{ |
|
730 |
MutexLocker ml(SR_lock()); |
|
731 |
// wait with safepoint check (if we're a JavaThread - the WatcherThread |
|
732 |
// can also call this) and increase delay with each retry |
|
733 |
SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); |
|
734 |
||
735 |
is_suspended = is_ext_suspend_completed(true /* called_by_wait */, |
|
736 |
delay, bits); |
|
737 |
||
738 |
// It is possible for the external suspend request to be cancelled |
|
739 |
// (by a resume) before the actual suspend operation is completed. |
|
740 |
// Refresh our local copy to see if we still need to wait. |
|
741 |
pending = is_external_suspend(); |
|
742 |
} |
|
743 |
||
744 |
if (!pending) { |
|
745 |
// A cancelled suspend request is the only false return from |
|
746 |
// is_ext_suspend_completed() that keeps us from staying in the |
|
747 |
// retry loop. |
|
748 |
*bits |= 0x00080000; |
|
749 |
return false; |
|
750 |
} |
|
751 |
||
752 |
if (is_suspended) { |
|
753 |
*bits |= 0x00100000; |
|
754 |
return true; |
|
755 |
} |
|
756 |
} // end retry loop |
|
757 |
||
758 |
// thread did not suspend after all our retries |
|
759 |
*bits |= 0x00200000; |
|
760 |
return false; |
|
761 |
} |
|
762 |
||
763 |
#ifndef PRODUCT |
|
764 |
void JavaThread::record_jump(address target, address instr, const char* file, int line) { |
|
765 |
||
766 |
// This should not need to be atomic as the only way for simultaneous |
|
767 |
// updates is via interrupts. Even then this should be rare or non-existant |
|
768 |
// and we don't care that much anyway. |
|
769 |
||
770 |
int index = _jmp_ring_index; |
|
771 |
_jmp_ring_index = (index + 1 ) & (jump_ring_buffer_size - 1); |
|
772 |
_jmp_ring[index]._target = (intptr_t) target; |
|
773 |
_jmp_ring[index]._instruction = (intptr_t) instr; |
|
774 |
_jmp_ring[index]._file = file; |
|
775 |
_jmp_ring[index]._line = line; |
|
776 |
} |
|
777 |
#endif /* PRODUCT */ |
|
778 |
||
779 |
// Called by flat profiler |
|
780 |
// Callers have already called wait_for_ext_suspend_completion |
|
781 |
// The assertion for that is currently too complex to put here: |
|
782 |
bool JavaThread::profile_last_Java_frame(frame* _fr) { |
|
783 |
bool gotframe = false; |
|
784 |
// self suspension saves needed state. |
|
785 |
if (has_last_Java_frame() && _anchor.walkable()) { |
|
786 |
*_fr = pd_last_frame(); |
|
787 |
gotframe = true; |
|
788 |
} |
|
789 |
return gotframe; |
|
790 |
} |
|
791 |
||
792 |
void Thread::interrupt(Thread* thread) { |
|
793 |
trace("interrupt", thread); |
|
794 |
debug_only(check_for_dangling_thread_pointer(thread);) |
|
795 |
os::interrupt(thread); |
|
796 |
} |
|
797 |
||
798 |
bool Thread::is_interrupted(Thread* thread, bool clear_interrupted) { |
|
799 |
trace("is_interrupted", thread); |
|
800 |
debug_only(check_for_dangling_thread_pointer(thread);) |
|
801 |
// Note: If clear_interrupted==false, this simply fetches and |
|
802 |
// returns the value of the field osthread()->interrupted(). |
|
803 |
return os::is_interrupted(thread, clear_interrupted); |
|
804 |
} |
|
805 |
||
806 |
||
807 |
// GC Support |
|
808 |
bool Thread::claim_oops_do_par_case(int strong_roots_parity) { |
|
809 |
jint thread_parity = _oops_do_parity; |
|
810 |
if (thread_parity != strong_roots_parity) { |
|
811 |
jint res = Atomic::cmpxchg(strong_roots_parity, &_oops_do_parity, thread_parity); |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10546
diff
changeset
|
812 |
if (res == thread_parity) { |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10546
diff
changeset
|
813 |
return true; |
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10546
diff
changeset
|
814 |
} else { |
1 | 815 |
guarantee(res == strong_roots_parity, "Or else what?"); |
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10966
diff
changeset
|
816 |
assert(SharedHeap::heap()->workers()->active_workers() > 0, |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10966
diff
changeset
|
817 |
"Should only fail when parallel."); |
1 | 818 |
return false; |
819 |
} |
|
820 |
} |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10966
diff
changeset
|
821 |
assert(SharedHeap::heap()->workers()->active_workers() > 0, |
1 | 822 |
"Should only fail when parallel."); |
823 |
return false; |
|
824 |
} |
|
825 |
||
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
826 |
void Thread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
1 | 827 |
active_handles()->oops_do(f); |
828 |
// Do oop for ThreadShadow |
|
829 |
f->do_oop((oop*)&_pending_exception); |
|
830 |
handle_area()->oops_do(f); |
|
831 |
} |
|
832 |
||
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3261
diff
changeset
|
833 |
void Thread::nmethods_do(CodeBlobClosure* cf) { |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3261
diff
changeset
|
834 |
// no nmethods in a generic thread... |
1 | 835 |
} |
836 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
837 |
void Thread::metadata_do(void f(Metadata*)) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
838 |
if (metadata_handles() != NULL) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
839 |
for (int i = 0; i< metadata_handles()->length(); i++) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
840 |
f(metadata_handles()->at(i)); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
841 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
842 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
843 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
844 |
|
1 | 845 |
void Thread::print_on(outputStream* st) const { |
846 |
// get_priority assumes osthread initialized |
|
847 |
if (osthread() != NULL) { |
|
13857 | 848 |
int os_prio; |
849 |
if (os::get_native_priority(this, &os_prio) == OS_OK) { |
|
850 |
st->print("os_prio=%d ", os_prio); |
|
851 |
} |
|
852 |
st->print("tid=" INTPTR_FORMAT " ", this); |
|
1 | 853 |
osthread()->print_on(st); |
854 |
} |
|
855 |
debug_only(if (WizardMode) print_owned_locks_on(st);) |
|
856 |
} |
|
857 |
||
858 |
// Thread::print_on_error() is called by fatal error handler. Don't use |
|
859 |
// any lock or allocate memory. |
|
860 |
void Thread::print_on_error(outputStream* st, char* buf, int buflen) const { |
|
861 |
if (is_VM_thread()) st->print("VMThread"); |
|
862 |
else if (is_Compiler_thread()) st->print("CompilerThread"); |
|
863 |
else if (is_Java_thread()) st->print("JavaThread"); |
|
864 |
else if (is_GC_task_thread()) st->print("GCTaskThread"); |
|
865 |
else if (is_Watcher_thread()) st->print("WatcherThread"); |
|
866 |
else if (is_ConcurrentGC_thread()) st->print("ConcurrentGCThread"); |
|
867 |
else st->print("Thread"); |
|
868 |
||
869 |
st->print(" [stack: " PTR_FORMAT "," PTR_FORMAT "]", |
|
870 |
_stack_base - _stack_size, _stack_base); |
|
871 |
||
872 |
if (osthread()) { |
|
873 |
st->print(" [id=%d]", osthread()->thread_id()); |
|
874 |
} |
|
875 |
} |
|
876 |
||
877 |
#ifdef ASSERT |
|
878 |
void Thread::print_owned_locks_on(outputStream* st) const { |
|
879 |
Monitor *cur = _owned_locks; |
|
880 |
if (cur == NULL) { |
|
881 |
st->print(" (no locks) "); |
|
882 |
} else { |
|
883 |
st->print_cr(" Locks owned:"); |
|
884 |
while(cur) { |
|
885 |
cur->print_on(st); |
|
886 |
cur = cur->next(); |
|
887 |
} |
|
888 |
} |
|
889 |
} |
|
890 |
||
891 |
static int ref_use_count = 0; |
|
892 |
||
893 |
bool Thread::owns_locks_but_compiled_lock() const { |
|
894 |
for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { |
|
895 |
if (cur != Compile_lock) return true; |
|
896 |
} |
|
897 |
return false; |
|
898 |
} |
|
899 |
||
900 |
||
901 |
#endif |
|
902 |
||
903 |
#ifndef PRODUCT |
|
904 |
||
905 |
// The flag: potential_vm_operation notifies if this particular safepoint state could potential |
|
906 |
// invoke the vm-thread (i.e., and oop allocation). In that case, we also have to make sure that |
|
907 |
// no threads which allow_vm_block's are held |
|
908 |
void Thread::check_for_valid_safepoint_state(bool potential_vm_operation) { |
|
909 |
// Check if current thread is allowed to block at a safepoint |
|
910 |
if (!(_allow_safepoint_count == 0)) |
|
911 |
fatal("Possible safepoint reached by thread that does not allow it"); |
|
912 |
if (is_Java_thread() && ((JavaThread*)this)->thread_state() != _thread_in_vm) { |
|
913 |
fatal("LEAF method calling lock?"); |
|
914 |
} |
|
915 |
||
916 |
#ifdef ASSERT |
|
917 |
if (potential_vm_operation && is_Java_thread() |
|
918 |
&& !Universe::is_bootstrapping()) { |
|
919 |
// Make sure we do not hold any locks that the VM thread also uses. |
|
920 |
// This could potentially lead to deadlocks |
|
921 |
for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { |
|
922 |
// Threads_lock is special, since the safepoint synchronization will not start before this is |
|
923 |
// acquired. Hence, a JavaThread cannot be holding it at a safepoint. So is VMOperationRequest_lock, |
|
924 |
// since it is used to transfer control between JavaThreads and the VMThread |
|
925 |
// Do not *exclude* any locks unless you are absolutly sure it is correct. Ask someone else first! |
|
926 |
if ( (cur->allow_vm_block() && |
|
927 |
cur != Threads_lock && |
|
928 |
cur != Compile_lock && // Temporary: should not be necessary when we get spearate compilation |
|
929 |
cur != VMOperationRequest_lock && |
|
930 |
cur != VMOperationQueue_lock) || |
|
931 |
cur->rank() == Mutex::special) { |
|
932 |
warning("Thread holding lock at safepoint that vm can block on: %s", cur->name()); |
|
933 |
} |
|
934 |
} |
|
935 |
} |
|
936 |
||
937 |
if (GCALotAtAllSafepoints) { |
|
938 |
// We could enter a safepoint here and thus have a gc |
|
939 |
InterfaceSupport::check_gc_alot(); |
|
940 |
} |
|
941 |
#endif |
|
942 |
} |
|
943 |
#endif |
|
944 |
||
945 |
bool Thread::is_in_stack(address adr) const { |
|
946 |
assert(Thread::current() == this, "is_in_stack can only be called from current thread"); |
|
947 |
address end = os::current_stack_pointer(); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
948 |
// Allow non Java threads to call this without stack_base |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
949 |
if (_stack_base == NULL) return true; |
1 | 950 |
if (stack_base() >= adr && adr >= end) return true; |
951 |
||
952 |
return false; |
|
953 |
} |
|
954 |
||
955 |
||
956 |
// We had to move these methods here, because vm threads get into ObjectSynchronizer::enter |
|
957 |
// However, there is a note in JavaThread::is_lock_owned() about the VM threads not being |
|
958 |
// used for compilation in the future. If that change is made, the need for these methods |
|
959 |
// should be revisited, and they should be removed if possible. |
|
960 |
||
961 |
bool Thread::is_lock_owned(address adr) const { |
|
6183
4c74cfe14f20
6975078: assert(allocated_on_res_area() || allocated_on_C_heap() || allocated_on_arena()
kvn
parents:
5888
diff
changeset
|
962 |
return on_local_stack(adr); |
1 | 963 |
} |
964 |
||
965 |
bool Thread::set_as_starting_thread() { |
|
966 |
// NOTE: this must be called inside the main thread. |
|
967 |
return os::create_main_thread((JavaThread*)this); |
|
968 |
} |
|
969 |
||
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
970 |
static void initialize_class(Symbol* class_name, TRAPS) { |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
971 |
Klass* klass = SystemDictionary::resolve_or_fail(class_name, true, CHECK); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
972 |
InstanceKlass::cast(klass)->initialize(CHECK); |
1 | 973 |
} |
974 |
||
975 |
||
976 |
// Creates the initial ThreadGroup |
|
977 |
static Handle create_initial_thread_group(TRAPS) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
978 |
Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ThreadGroup(), true, CHECK_NH); |
1 | 979 |
instanceKlassHandle klass (THREAD, k); |
980 |
||
981 |
Handle system_instance = klass->allocate_instance_handle(CHECK_NH); |
|
982 |
{ |
|
983 |
JavaValue result(T_VOID); |
|
984 |
JavaCalls::call_special(&result, |
|
985 |
system_instance, |
|
986 |
klass, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
987 |
vmSymbols::object_initializer_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
988 |
vmSymbols::void_method_signature(), |
1 | 989 |
CHECK_NH); |
990 |
} |
|
991 |
Universe::set_system_thread_group(system_instance()); |
|
992 |
||
993 |
Handle main_instance = klass->allocate_instance_handle(CHECK_NH); |
|
994 |
{ |
|
995 |
JavaValue result(T_VOID); |
|
996 |
Handle string = java_lang_String::create_from_str("main", CHECK_NH); |
|
997 |
JavaCalls::call_special(&result, |
|
998 |
main_instance, |
|
999 |
klass, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1000 |
vmSymbols::object_initializer_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1001 |
vmSymbols::threadgroup_string_void_signature(), |
1 | 1002 |
system_instance, |
1003 |
string, |
|
1004 |
CHECK_NH); |
|
1005 |
} |
|
1006 |
return main_instance; |
|
1007 |
} |
|
1008 |
||
1009 |
// Creates the initial Thread |
|
1010 |
static oop create_initial_thread(Handle thread_group, JavaThread* thread, TRAPS) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
1011 |
Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_NULL); |
1 | 1012 |
instanceKlassHandle klass (THREAD, k); |
1013 |
instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_NULL); |
|
1014 |
||
1015 |
java_lang_Thread::set_thread(thread_oop(), thread); |
|
1016 |
java_lang_Thread::set_priority(thread_oop(), NormPriority); |
|
1017 |
thread->set_threadObj(thread_oop()); |
|
1018 |
||
1019 |
Handle string = java_lang_String::create_from_str("main", CHECK_NULL); |
|
1020 |
||
1021 |
JavaValue result(T_VOID); |
|
1022 |
JavaCalls::call_special(&result, thread_oop, |
|
1023 |
klass, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1024 |
vmSymbols::object_initializer_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1025 |
vmSymbols::threadgroup_string_void_signature(), |
1 | 1026 |
thread_group, |
1027 |
string, |
|
1028 |
CHECK_NULL); |
|
1029 |
return thread_oop(); |
|
1030 |
} |
|
1031 |
||
1032 |
static void call_initializeSystemClass(TRAPS) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
1033 |
Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
1 | 1034 |
instanceKlassHandle klass (THREAD, k); |
1035 |
||
1036 |
JavaValue result(T_VOID); |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1037 |
JavaCalls::call_static(&result, klass, vmSymbols::initializeSystemClass_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1038 |
vmSymbols::void_method_signature(), CHECK); |
1 | 1039 |
} |
1040 |
||
13106 | 1041 |
char java_runtime_name[128] = ""; |
14289
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
14120
diff
changeset
|
1042 |
char java_runtime_version[128] = ""; |
13106 | 1043 |
|
1044 |
// extract the JRE name from sun.misc.Version.java_runtime_name |
|
1045 |
static const char* get_java_runtime_name(TRAPS) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
1046 |
Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
13106 | 1047 |
Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
1048 |
fieldDescriptor fd; |
|
1049 |
bool found = k != NULL && |
|
13728
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|
1050 |
InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_name_name(), |
13106 | 1051 |
vmSymbols::string_signature(), &fd); |
1052 |
if (found) { |
|
1053 |
oop name_oop = k->java_mirror()->obj_field(fd.offset()); |
|
1054 |
if (name_oop == NULL) |
|
1055 |
return NULL; |
|
1056 |
const char* name = java_lang_String::as_utf8_string(name_oop, |
|
1057 |
java_runtime_name, |
|
1058 |
sizeof(java_runtime_name)); |
|
1059 |
return name; |
|
1060 |
} else { |
|
1061 |
return NULL; |
|
1062 |
} |
|
1063 |
} |
|
1064 |
||
14289
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diff
changeset
|
1065 |
// extract the JRE version from sun.misc.Version.java_runtime_version |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
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diff
changeset
|
1066 |
static const char* get_java_runtime_version(TRAPS) { |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
14120
diff
changeset
|
1067 |
Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
14120
diff
changeset
|
1068 |
Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
14120
diff
changeset
|
1069 |
fieldDescriptor fd; |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
14120
diff
changeset
|
1070 |
bool found = k != NULL && |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
14120
diff
changeset
|
1071 |
InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_version_name(), |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
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diff
changeset
|
1072 |
vmSymbols::string_signature(), &fd); |
aec758622b4b
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parents:
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diff
changeset
|
1073 |
if (found) { |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
14120
diff
changeset
|
1074 |
oop name_oop = k->java_mirror()->obj_field(fd.offset()); |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
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diff
changeset
|
1075 |
if (name_oop == NULL) |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
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diff
changeset
|
1076 |
return NULL; |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
14120
diff
changeset
|
1077 |
const char* name = java_lang_String::as_utf8_string(name_oop, |
aec758622b4b
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sla
parents:
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diff
changeset
|
1078 |
java_runtime_version, |
aec758622b4b
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sla
parents:
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diff
changeset
|
1079 |
sizeof(java_runtime_version)); |
aec758622b4b
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sla
parents:
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diff
changeset
|
1080 |
return name; |
aec758622b4b
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sla
parents:
14120
diff
changeset
|
1081 |
} else { |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
14120
diff
changeset
|
1082 |
return NULL; |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
14120
diff
changeset
|
1083 |
} |
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
14120
diff
changeset
|
1084 |
} |
aec758622b4b
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sla
parents:
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diff
changeset
|
1085 |
|
7900
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
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diff
changeset
|
1086 |
// General purpose hook into Java code, run once when the VM is initialized. |
4c7fc6332f7e
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parents:
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diff
changeset
|
1087 |
// The Java library method itself may be changed independently from the VM. |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
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diff
changeset
|
1088 |
static void call_postVMInitHook(TRAPS) { |
13728
882756847a04
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diff
changeset
|
1089 |
Klass* k = SystemDictionary::PostVMInitHook_klass(); |
7900
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
1090 |
instanceKlassHandle klass (THREAD, k); |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
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diff
changeset
|
1091 |
if (klass.not_null()) { |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
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diff
changeset
|
1092 |
JavaValue result(T_VOID); |
8076
96d498ec7ae1
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diff
changeset
|
1093 |
JavaCalls::call_static(&result, klass, vmSymbols::run_method_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1094 |
vmSymbols::void_method_signature(), |
7900
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
1095 |
CHECK); |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
1096 |
} |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
1097 |
} |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
1098 |
|
1 | 1099 |
static void reset_vm_info_property(TRAPS) { |
1100 |
// the vm info string |
|
1101 |
ResourceMark rm(THREAD); |
|
1102 |
const char *vm_info = VM_Version::vm_info_string(); |
|
1103 |
||
1104 |
// java.lang.System class |
|
13728
882756847a04
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parents:
13196
diff
changeset
|
1105 |
Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
1 | 1106 |
instanceKlassHandle klass (THREAD, k); |
1107 |
||
1108 |
// setProperty arguments |
|
1109 |
Handle key_str = java_lang_String::create_from_str("java.vm.info", CHECK); |
|
1110 |
Handle value_str = java_lang_String::create_from_str(vm_info, CHECK); |
|
1111 |
||
1112 |
// return value |
|
1113 |
JavaValue r(T_OBJECT); |
|
1114 |
||
1115 |
// public static String setProperty(String key, String value); |
|
1116 |
JavaCalls::call_static(&r, |
|
1117 |
klass, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1118 |
vmSymbols::setProperty_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1119 |
vmSymbols::string_string_string_signature(), |
1 | 1120 |
key_str, |
1121 |
value_str, |
|
1122 |
CHECK); |
|
1123 |
} |
|
1124 |
||
1125 |
||
1126 |
void JavaThread::allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS) { |
|
1127 |
assert(thread_group.not_null(), "thread group should be specified"); |
|
1128 |
assert(threadObj() == NULL, "should only create Java thread object once"); |
|
1129 |
||
13728
882756847a04
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coleenp
parents:
13196
diff
changeset
|
1130 |
Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
1 | 1131 |
instanceKlassHandle klass (THREAD, k); |
1132 |
instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); |
|
1133 |
||
1134 |
java_lang_Thread::set_thread(thread_oop(), this); |
|
1135 |
java_lang_Thread::set_priority(thread_oop(), NormPriority); |
|
1136 |
set_threadObj(thread_oop()); |
|
1137 |
||
1138 |
JavaValue result(T_VOID); |
|
1139 |
if (thread_name != NULL) { |
|
1140 |
Handle name = java_lang_String::create_from_str(thread_name, CHECK); |
|
1141 |
// Thread gets assigned specified name and null target |
|
1142 |
JavaCalls::call_special(&result, |
|
1143 |
thread_oop, |
|
1144 |
klass, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1145 |
vmSymbols::object_initializer_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1146 |
vmSymbols::threadgroup_string_void_signature(), |
1 | 1147 |
thread_group, // Argument 1 |
1148 |
name, // Argument 2 |
|
1149 |
THREAD); |
|
1150 |
} else { |
|
1151 |
// Thread gets assigned name "Thread-nnn" and null target |
|
1152 |
// (java.lang.Thread doesn't have a constructor taking only a ThreadGroup argument) |
|
1153 |
JavaCalls::call_special(&result, |
|
1154 |
thread_oop, |
|
1155 |
klass, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1156 |
vmSymbols::object_initializer_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1157 |
vmSymbols::threadgroup_runnable_void_signature(), |
1 | 1158 |
thread_group, // Argument 1 |
1159 |
Handle(), // Argument 2 |
|
1160 |
THREAD); |
|
1161 |
} |
|
1162 |
||
1163 |
||
1164 |
if (daemon) { |
|
1165 |
java_lang_Thread::set_daemon(thread_oop()); |
|
1166 |
} |
|
1167 |
||
1168 |
if (HAS_PENDING_EXCEPTION) { |
|
1169 |
return; |
|
1170 |
} |
|
1171 |
||
4571 | 1172 |
KlassHandle group(this, SystemDictionary::ThreadGroup_klass()); |
1 | 1173 |
Handle threadObj(this, this->threadObj()); |
1174 |
||
1175 |
JavaCalls::call_special(&result, |
|
1176 |
thread_group, |
|
1177 |
group, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1178 |
vmSymbols::add_method_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1179 |
vmSymbols::thread_void_signature(), |
1 | 1180 |
threadObj, // Arg 1 |
1181 |
THREAD); |
|
1182 |
||
1183 |
||
1184 |
} |
|
1185 |
||
1186 |
// NamedThread -- non-JavaThread subclasses with multiple |
|
1187 |
// uniquely named instances should derive from this. |
|
1188 |
NamedThread::NamedThread() : Thread() { |
|
1189 |
_name = NULL; |
|
4489
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
1190 |
_processed_thread = NULL; |
1 | 1191 |
} |
1192 |
||
1193 |
NamedThread::~NamedThread() { |
|
1194 |
if (_name != NULL) { |
|
13195 | 1195 |
FREE_C_HEAP_ARRAY(char, _name, mtThread); |
1 | 1196 |
_name = NULL; |
1197 |
} |
|
1198 |
} |
|
1199 |
||
1200 |
void NamedThread::set_name(const char* format, ...) { |
|
1201 |
guarantee(_name == NULL, "Only get to set name once."); |
|
13195 | 1202 |
_name = NEW_C_HEAP_ARRAY(char, max_name_len, mtThread); |
1 | 1203 |
guarantee(_name != NULL, "alloc failure"); |
1204 |
va_list ap; |
|
1205 |
va_start(ap, format); |
|
1206 |
jio_vsnprintf(_name, max_name_len, format, ap); |
|
1207 |
va_end(ap); |
|
1208 |
} |
|
1209 |
||
1210 |
// ======= WatcherThread ======== |
|
1211 |
||
1212 |
// The watcher thread exists to simulate timer interrupts. It should |
|
1213 |
// be replaced by an abstraction over whatever native support for |
|
1214 |
// timer interrupts exists on the platform. |
|
1215 |
||
1216 |
WatcherThread* WatcherThread::_watcher_thread = NULL; |
|
14390
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
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diff
changeset
|
1217 |
bool WatcherThread::_startable = false; |
6176
4d9030fe341f
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
5888
diff
changeset
|
1218 |
volatile bool WatcherThread::_should_terminate = false; |
1 | 1219 |
|
1220 |
WatcherThread::WatcherThread() : Thread() { |
|
1221 |
assert(watcher_thread() == NULL, "we can only allocate one WatcherThread"); |
|
1222 |
if (os::create_thread(this, os::watcher_thread)) { |
|
1223 |
_watcher_thread = this; |
|
1224 |
||
1225 |
// Set the watcher thread to the highest OS priority which should not be |
|
1226 |
// used, unless a Java thread with priority java.lang.Thread.MAX_PRIORITY |
|
1227 |
// is created. The only normal thread using this priority is the reference |
|
1228 |
// handler thread, which runs for very short intervals only. |
|
1229 |
// If the VMThread's priority is not lower than the WatcherThread profiling |
|
1230 |
// will be inaccurate. |
|
1231 |
os::set_priority(this, MaxPriority); |
|
1232 |
if (!DisableStartThread) { |
|
1233 |
os::start_thread(this); |
|
1234 |
} |
|
1235 |
} |
|
1236 |
} |
|
1237 |
||
14390
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
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diff
changeset
|
1238 |
int WatcherThread::sleep() const { |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1239 |
MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1240 |
|
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1241 |
// remaining will be zero if there are no tasks, |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1242 |
// causing the WatcherThread to sleep until a task is |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1243 |
// enrolled |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1244 |
int remaining = PeriodicTask::time_to_wait(); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1245 |
int time_slept = 0; |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1246 |
|
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1247 |
// we expect this to timeout - we only ever get unparked when |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1248 |
// we should terminate or when a new task has been enrolled |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1249 |
OSThreadWaitState osts(this->osthread(), false /* not Object.wait() */); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
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diff
changeset
|
1250 |
|
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
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diff
changeset
|
1251 |
jlong time_before_loop = os::javaTimeNanos(); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1252 |
|
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1253 |
for (;;) { |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1254 |
bool timedout = PeriodicTask_lock->wait(Mutex::_no_safepoint_check_flag, remaining); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
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diff
changeset
|
1255 |
jlong now = os::javaTimeNanos(); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
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diff
changeset
|
1256 |
|
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1257 |
if (remaining == 0) { |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1258 |
// if we didn't have any tasks we could have waited for a long time |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1259 |
// consider the time_slept zero and reset time_before_loop |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1260 |
time_slept = 0; |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1261 |
time_before_loop = now; |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
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diff
changeset
|
1262 |
} else { |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1263 |
// need to recalulate since we might have new tasks in _tasks |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1264 |
time_slept = (int) ((now - time_before_loop) / 1000000); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
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diff
changeset
|
1265 |
} |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
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diff
changeset
|
1266 |
|
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
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parents:
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diff
changeset
|
1267 |
// Change to task list or spurious wakeup of some kind |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1268 |
if (timedout || _should_terminate) { |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1269 |
break; |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1270 |
} |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1271 |
|
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1272 |
remaining = PeriodicTask::time_to_wait(); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1273 |
if (remaining == 0) { |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1274 |
// Last task was just disenrolled so loop around and wait until |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1275 |
// another task gets enrolled |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1276 |
continue; |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1277 |
} |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1278 |
|
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1279 |
remaining -= time_slept; |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1280 |
if (remaining <= 0) |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1281 |
break; |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1282 |
} |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1283 |
|
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1284 |
return time_slept; |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1285 |
} |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1286 |
|
1 | 1287 |
void WatcherThread::run() { |
1288 |
assert(this == watcher_thread(), "just checking"); |
|
1289 |
||
1290 |
this->record_stack_base_and_size(); |
|
1291 |
this->initialize_thread_local_storage(); |
|
1292 |
this->set_active_handles(JNIHandleBlock::allocate_block()); |
|
1293 |
while(!_should_terminate) { |
|
1294 |
assert(watcher_thread() == Thread::current(), "thread consistency check"); |
|
1295 |
assert(watcher_thread() == this, "thread consistency check"); |
|
1296 |
||
1297 |
// Calculate how long it'll be until the next PeriodicTask work |
|
1298 |
// should be done, and sleep that amount of time. |
|
14390
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1299 |
int time_waited = sleep(); |
1 | 1300 |
|
1301 |
if (is_error_reported()) { |
|
1302 |
// A fatal error has happened, the error handler(VMError::report_and_die) |
|
1303 |
// should abort JVM after creating an error log file. However in some |
|
1304 |
// rare cases, the error handler itself might deadlock. Here we try to |
|
1305 |
// kill JVM if the fatal error handler fails to abort in 2 minutes. |
|
1306 |
// |
|
1307 |
// This code is in WatcherThread because WatcherThread wakes up |
|
1308 |
// periodically so the fatal error handler doesn't need to do anything; |
|
1309 |
// also because the WatcherThread is less likely to crash than other |
|
1310 |
// threads. |
|
1311 |
||
1312 |
for (;;) { |
|
1313 |
if (!ShowMessageBoxOnError |
|
1314 |
&& (OnError == NULL || OnError[0] == '\0') |
|
1315 |
&& Arguments::abort_hook() == NULL) { |
|
1316 |
os::sleep(this, 2 * 60 * 1000, false); |
|
1317 |
fdStream err(defaultStream::output_fd()); |
|
1318 |
err.print_raw_cr("# [ timer expired, abort... ]"); |
|
1319 |
// skip atexit/vm_exit/vm_abort hooks |
|
1320 |
os::die(); |
|
1321 |
} |
|
1322 |
||
1323 |
// Wake up 5 seconds later, the fatal handler may reset OnError or |
|
1324 |
// ShowMessageBoxOnError when it is ready to abort. |
|
1325 |
os::sleep(this, 5 * 1000, false); |
|
1326 |
} |
|
1327 |
} |
|
1328 |
||
14390
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1329 |
PeriodicTask::real_time_tick(time_waited); |
1 | 1330 |
} |
1331 |
||
1332 |
// Signal that it is terminated |
|
1333 |
{ |
|
1334 |
MutexLockerEx mu(Terminator_lock, Mutex::_no_safepoint_check_flag); |
|
1335 |
_watcher_thread = NULL; |
|
1336 |
Terminator_lock->notify(); |
|
1337 |
} |
|
1338 |
||
1339 |
// Thread destructor usually does this.. |
|
1340 |
ThreadLocalStorage::set_thread(NULL); |
|
1341 |
} |
|
1342 |
||
1343 |
void WatcherThread::start() { |
|
14390
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1344 |
assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1345 |
|
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1346 |
if (watcher_thread() == NULL && _startable) { |
1 | 1347 |
_should_terminate = false; |
1348 |
// Create the single instance of WatcherThread |
|
1349 |
new WatcherThread(); |
|
1350 |
} |
|
1351 |
} |
|
1352 |
||
14390
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1353 |
void WatcherThread::make_startable() { |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1354 |
assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1355 |
_startable = true; |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1356 |
} |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1357 |
|
1 | 1358 |
void WatcherThread::stop() { |
14390
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1359 |
{ |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1360 |
MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1361 |
_should_terminate = true; |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1362 |
OrderAccess::fence(); // ensure WatcherThread sees update in main loop |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1363 |
|
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1364 |
WatcherThread* watcher = watcher_thread(); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1365 |
if (watcher != NULL) |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1366 |
watcher->unpark(); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1367 |
} |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1368 |
|
1 | 1369 |
// it is ok to take late safepoints here, if needed |
1370 |
MutexLocker mu(Terminator_lock); |
|
6176
4d9030fe341f
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
5888
diff
changeset
|
1371 |
|
1 | 1372 |
while(watcher_thread() != NULL) { |
1373 |
// This wait should make safepoint checks, wait without a timeout, |
|
1374 |
// and wait as a suspend-equivalent condition. |
|
1375 |
// |
|
1376 |
// Note: If the FlatProfiler is running, then this thread is waiting |
|
1377 |
// for the WatcherThread to terminate and the WatcherThread, via the |
|
1378 |
// FlatProfiler task, is waiting for the external suspend request on |
|
1379 |
// this thread to complete. wait_for_ext_suspend_completion() will |
|
1380 |
// eventually timeout, but that takes time. Making this wait a |
|
1381 |
// suspend-equivalent condition solves that timeout problem. |
|
1382 |
// |
|
1383 |
Terminator_lock->wait(!Mutex::_no_safepoint_check_flag, 0, |
|
1384 |
Mutex::_as_suspend_equivalent_flag); |
|
1385 |
} |
|
1386 |
} |
|
1387 |
||
14390
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1388 |
void WatcherThread::unpark() { |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1389 |
MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ? NULL : PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1390 |
PeriodicTask_lock->notify(); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1391 |
} |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
1392 |
|
1 | 1393 |
void WatcherThread::print_on(outputStream* st) const { |
1394 |
st->print("\"%s\" ", name()); |
|
1395 |
Thread::print_on(st); |
|
1396 |
st->cr(); |
|
1397 |
} |
|
1398 |
||
1399 |
// ======= JavaThread ======== |
|
1400 |
||
1401 |
// A JavaThread is a normal Java thread |
|
1402 |
||
1403 |
void JavaThread::initialize() { |
|
1404 |
// Initialize fields |
|
1374
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1405 |
|
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1406 |
// Set the claimed par_id to -1 (ie not claiming any par_ids) |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1407 |
set_claimed_par_id(-1); |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1408 |
|
1 | 1409 |
set_saved_exception_pc(NULL); |
1410 |
set_threadObj(NULL); |
|
1411 |
_anchor.clear(); |
|
1412 |
set_entry_point(NULL); |
|
1413 |
set_jni_functions(jni_functions()); |
|
1414 |
set_callee_target(NULL); |
|
1415 |
set_vm_result(NULL); |
|
1416 |
set_vm_result_2(NULL); |
|
1417 |
set_vframe_array_head(NULL); |
|
1418 |
set_vframe_array_last(NULL); |
|
1419 |
set_deferred_locals(NULL); |
|
1420 |
set_deopt_mark(NULL); |
|
6740
2bc601284215
6986270: guarantee(*bcp != Bytecodes::_monitorenter || exec_mode != Deoptimization::Unpack_exception) fails
iveresov
parents:
6273
diff
changeset
|
1421 |
set_deopt_nmethod(NULL); |
1 | 1422 |
clear_must_deopt_id(); |
1423 |
set_monitor_chunks(NULL); |
|
1424 |
set_next(NULL); |
|
1425 |
set_thread_state(_thread_new); |
|
13975
2f7431485cfa
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
13860
diff
changeset
|
1426 |
#if INCLUDE_NMT |
13195 | 1427 |
set_recorder(NULL); |
13975
2f7431485cfa
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
13860
diff
changeset
|
1428 |
#endif |
1 | 1429 |
_terminated = _not_terminated; |
1430 |
_privileged_stack_top = NULL; |
|
1431 |
_array_for_gc = NULL; |
|
1432 |
_suspend_equivalent = false; |
|
1433 |
_in_deopt_handler = 0; |
|
1434 |
_doing_unsafe_access = false; |
|
1435 |
_stack_guard_state = stack_guard_unused; |
|
1436 |
_exception_oop = NULL; |
|
1437 |
_exception_pc = 0; |
|
1438 |
_exception_handler_pc = 0; |
|
7104 | 1439 |
_is_method_handle_return = 0; |
1 | 1440 |
_jvmti_thread_state= NULL; |
4761
bdb7375a1fee
6902182: 4/4 Starting with jdwp agent should not incur performance penalty
dcubed
parents:
4637
diff
changeset
|
1441 |
_should_post_on_exceptions_flag = JNI_FALSE; |
1 | 1442 |
_jvmti_get_loaded_classes_closure = NULL; |
1443 |
_interp_only_mode = 0; |
|
1444 |
_special_runtime_exit_condition = _no_async_condition; |
|
1445 |
_pending_async_exception = NULL; |
|
1446 |
_is_compiling = false; |
|
1447 |
_thread_stat = NULL; |
|
1448 |
_thread_stat = new ThreadStatistics(); |
|
1449 |
_blocked_on_compilation = false; |
|
1450 |
_jni_active_critical = 0; |
|
1451 |
_do_not_unlock_if_synchronized = false; |
|
1452 |
_cached_monitor_info = NULL; |
|
1453 |
_parker = Parker::Allocate(this) ; |
|
1454 |
||
1455 |
#ifndef PRODUCT |
|
1456 |
_jmp_ring_index = 0; |
|
1457 |
for (int ji = 0 ; ji < jump_ring_buffer_size ; ji++ ) { |
|
1458 |
record_jump(NULL, NULL, NULL, 0); |
|
1459 |
} |
|
1460 |
#endif /* PRODUCT */ |
|
1461 |
||
1462 |
set_thread_profiler(NULL); |
|
1463 |
if (FlatProfiler::is_active()) { |
|
1464 |
// This is where we would decide to either give each thread it's own profiler |
|
1465 |
// or use one global one from FlatProfiler, |
|
1466 |
// or up to some count of the number of profiled threads, etc. |
|
1467 |
ThreadProfiler* pp = new ThreadProfiler(); |
|
1468 |
pp->engage(); |
|
1469 |
set_thread_profiler(pp); |
|
1470 |
} |
|
1471 |
||
1472 |
// Setup safepoint state info for this thread |
|
1473 |
ThreadSafepointState::create(this); |
|
1474 |
||
1475 |
debug_only(_java_call_counter = 0); |
|
1476 |
||
1477 |
// JVMTI PopFrame support |
|
1478 |
_popframe_condition = popframe_inactive; |
|
1479 |
_popframe_preserved_args = NULL; |
|
1480 |
_popframe_preserved_args_size = 0; |
|
1481 |
||
1482 |
pd_initialize(); |
|
1483 |
} |
|
1484 |
||
1374
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1485 |
#ifndef SERIALGC |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1486 |
SATBMarkQueueSet JavaThread::_satb_mark_queue_set; |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1487 |
DirtyCardQueueSet JavaThread::_dirty_card_queue_set; |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1488 |
#endif // !SERIALGC |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1489 |
|
10739 | 1490 |
JavaThread::JavaThread(bool is_attaching_via_jni) : |
1374
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1491 |
Thread() |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1492 |
#ifndef SERIALGC |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1493 |
, _satb_mark_queue(&_satb_mark_queue_set), |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1494 |
_dirty_card_queue(&_dirty_card_queue_set) |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1495 |
#endif // !SERIALGC |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1496 |
{ |
1 | 1497 |
initialize(); |
10739 | 1498 |
if (is_attaching_via_jni) { |
1499 |
_jni_attach_state = _attaching_via_jni; |
|
1500 |
} else { |
|
1501 |
_jni_attach_state = _not_attaching_via_jni; |
|
1502 |
} |
|
4030
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3916
diff
changeset
|
1503 |
assert(_deferred_card_mark.is_empty(), "Default MemRegion ctor"); |
13195 | 1504 |
_safepoint_visible = false; |
1 | 1505 |
} |
1506 |
||
1507 |
bool JavaThread::reguard_stack(address cur_sp) { |
|
1508 |
if (_stack_guard_state != stack_guard_yellow_disabled) { |
|
1509 |
return true; // Stack already guarded or guard pages not needed. |
|
1510 |
} |
|
1511 |
||
1512 |
if (register_stack_overflow()) { |
|
1513 |
// For those architectures which have separate register and |
|
1514 |
// memory stacks, we must check the register stack to see if |
|
1515 |
// it has overflowed. |
|
1516 |
return false; |
|
1517 |
} |
|
1518 |
||
1519 |
// Java code never executes within the yellow zone: the latter is only |
|
1520 |
// there to provoke an exception during stack banging. If java code |
|
1521 |
// is executing there, either StackShadowPages should be larger, or |
|
1522 |
// some exception code in c1, c2 or the interpreter isn't unwinding |
|
1523 |
// when it should. |
|
1524 |
guarantee(cur_sp > stack_yellow_zone_base(), "not enough space to reguard - increase StackShadowPages"); |
|
1525 |
||
1526 |
enable_stack_yellow_zone(); |
|
1527 |
return true; |
|
1528 |
} |
|
1529 |
||
1530 |
bool JavaThread::reguard_stack(void) { |
|
1531 |
return reguard_stack(os::current_stack_pointer()); |
|
1532 |
} |
|
1533 |
||
1534 |
||
1535 |
void JavaThread::block_if_vm_exited() { |
|
1536 |
if (_terminated == _vm_exited) { |
|
1537 |
// _vm_exited is set at safepoint, and Threads_lock is never released |
|
1538 |
// we will block here forever |
|
1539 |
Threads_lock->lock_without_safepoint_check(); |
|
1540 |
ShouldNotReachHere(); |
|
1541 |
} |
|
1542 |
} |
|
1543 |
||
1544 |
||
1545 |
// Remove this ifdef when C1 is ported to the compiler interface. |
|
1546 |
static void compiler_thread_entry(JavaThread* thread, TRAPS); |
|
1547 |
||
1374
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1548 |
JavaThread::JavaThread(ThreadFunction entry_point, size_t stack_sz) : |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1549 |
Thread() |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1550 |
#ifndef SERIALGC |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1551 |
, _satb_mark_queue(&_satb_mark_queue_set), |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1552 |
_dirty_card_queue(&_dirty_card_queue_set) |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1553 |
#endif // !SERIALGC |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
1554 |
{ |
1 | 1555 |
if (TraceThreadEvents) { |
1556 |
tty->print_cr("creating thread %p", this); |
|
1557 |
} |
|
1558 |
initialize(); |
|
10739 | 1559 |
_jni_attach_state = _not_attaching_via_jni; |
1 | 1560 |
set_entry_point(entry_point); |
1561 |
// Create the native thread itself. |
|
1562 |
// %note runtime_23 |
|
1563 |
os::ThreadType thr_type = os::java_thread; |
|
1564 |
thr_type = entry_point == &compiler_thread_entry ? os::compiler_thread : |
|
1565 |
os::java_thread; |
|
1566 |
os::create_thread(this, thr_type, stack_sz); |
|
13195 | 1567 |
_safepoint_visible = false; |
1 | 1568 |
// The _osthread may be NULL here because we ran out of memory (too many threads active). |
1569 |
// We need to throw and OutOfMemoryError - however we cannot do this here because the caller |
|
1570 |
// may hold a lock and all locks must be unlocked before throwing the exception (throwing |
|
1571 |
// the exception consists of creating the exception object & initializing it, initialization |
|
1572 |
// will leave the VM via a JavaCall and then all locks must be unlocked). |
|
1573 |
// |
|
1574 |
// The thread is still suspended when we reach here. Thread must be explicit started |
|
1575 |
// by creator! Furthermore, the thread must also explicitly be added to the Threads list |
|
1576 |
// by calling Threads:add. The reason why this is not done here, is because the thread |
|
1577 |
// object must be fully initialized (take a look at JVM_Start) |
|
1578 |
} |
|
1579 |
||
1580 |
JavaThread::~JavaThread() { |
|
1581 |
if (TraceThreadEvents) { |
|
1582 |
tty->print_cr("terminate thread %p", this); |
|
1583 |
} |
|
1584 |
||
14120
7d298141c258
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
14083
diff
changeset
|
1585 |
// By now, this thread should already be invisible to safepoint, |
7d298141c258
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
14083
diff
changeset
|
1586 |
// and its per-thread recorder also collected. |
13195 | 1587 |
assert(!is_safepoint_visible(), "wrong state"); |
14120
7d298141c258
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
14083
diff
changeset
|
1588 |
#if INCLUDE_NMT |
7d298141c258
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
14083
diff
changeset
|
1589 |
assert(get_recorder() == NULL, "Already collected"); |
7d298141c258
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
14083
diff
changeset
|
1590 |
#endif // INCLUDE_NMT |
13195 | 1591 |
|
1 | 1592 |
// JSR166 -- return the parker to the free list |
1593 |
Parker::Release(_parker); |
|
1594 |
_parker = NULL ; |
|
1595 |
||
1596 |
// Free any remaining previous UnrollBlock |
|
1597 |
vframeArray* old_array = vframe_array_last(); |
|
1598 |
||
1599 |
if (old_array != NULL) { |
|
1600 |
Deoptimization::UnrollBlock* old_info = old_array->unroll_block(); |
|
1601 |
old_array->set_unroll_block(NULL); |
|
1602 |
delete old_info; |
|
1603 |
delete old_array; |
|
1604 |
} |
|
1605 |
||
1606 |
GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred = deferred_locals(); |
|
1607 |
if (deferred != NULL) { |
|
1608 |
// This can only happen if thread is destroyed before deoptimization occurs. |
|
1609 |
assert(deferred->length() != 0, "empty array!"); |
|
1610 |
do { |
|
1611 |
jvmtiDeferredLocalVariableSet* dlv = deferred->at(0); |
|
1612 |
deferred->remove_at(0); |
|
1613 |
// individual jvmtiDeferredLocalVariableSet are CHeapObj's |
|
1614 |
delete dlv; |
|
1615 |
} while (deferred->length() != 0); |
|
1616 |
delete deferred; |
|
1617 |
} |
|
1618 |
||
1619 |
// All Java related clean up happens in exit |
|
1620 |
ThreadSafepointState::destroy(this); |
|
1621 |
if (_thread_profiler != NULL) delete _thread_profiler; |
|
1622 |
if (_thread_stat != NULL) delete _thread_stat; |
|
1623 |
} |
|
1624 |
||
1625 |
||
1626 |
// The first routine called by a new Java thread |
|
1627 |
void JavaThread::run() { |
|
1628 |
// initialize thread-local alloc buffer related fields |
|
1629 |
this->initialize_tlab(); |
|
1630 |
||
1631 |
// used to test validitity of stack trace backs |
|
1632 |
this->record_base_of_stack_pointer(); |
|
1633 |
||
1634 |
// Record real stack base and size. |
|
1635 |
this->record_stack_base_and_size(); |
|
1636 |
||
1637 |
// Initialize thread local storage; set before calling MutexLocker |
|
1638 |
this->initialize_thread_local_storage(); |
|
1639 |
||
1640 |
this->create_stack_guard_pages(); |
|
1641 |
||
6176
4d9030fe341f
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
5888
diff
changeset
|
1642 |
this->cache_global_variables(); |
4d9030fe341f
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
5888
diff
changeset
|
1643 |
|
1 | 1644 |
// Thread is now sufficient initialized to be handled by the safepoint code as being |
1645 |
// in the VM. Change thread state from _thread_new to _thread_in_vm |
|
1646 |
ThreadStateTransition::transition_and_fence(this, _thread_new, _thread_in_vm); |
|
1647 |
||
1648 |
assert(JavaThread::current() == this, "sanity check"); |
|
1649 |
assert(!Thread::current()->owns_locks(), "sanity check"); |
|
1650 |
||
1651 |
DTRACE_THREAD_PROBE(start, this); |
|
1652 |
||
1653 |
// This operation might block. We call that after all safepoint checks for a new thread has |
|
1654 |
// been completed. |
|
1655 |
this->set_active_handles(JNIHandleBlock::allocate_block()); |
|
1656 |
||
1657 |
if (JvmtiExport::should_post_thread_life()) { |
|
1658 |
JvmtiExport::post_thread_start(this); |
|
1659 |
} |
|
1660 |
||
11480
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1661 |
EVENT_BEGIN(TraceEventThreadStart, event); |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1662 |
EVENT_COMMIT(event, |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1663 |
EVENT_SET(event, javalangthread, java_lang_Thread::thread_id(this->threadObj()))); |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1664 |
|
1 | 1665 |
// We call another function to do the rest so we are sure that the stack addresses used |
1666 |
// from there will be lower than the stack base just computed |
|
1667 |
thread_main_inner(); |
|
1668 |
||
1669 |
// Note, thread is no longer valid at this point! |
|
1670 |
} |
|
1671 |
||
1672 |
||
1673 |
void JavaThread::thread_main_inner() { |
|
1674 |
assert(JavaThread::current() == this, "sanity check"); |
|
1675 |
assert(this->threadObj() != NULL, "just checking"); |
|
1676 |
||
8061
07585870d15f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
7900
diff
changeset
|
1677 |
// Execute thread entry point unless this thread has a pending exception |
07585870d15f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
7900
diff
changeset
|
1678 |
// or has been stopped before starting. |
1 | 1679 |
// Note: Due to JVM_StopThread we can have pending exceptions already! |
8061
07585870d15f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
7900
diff
changeset
|
1680 |
if (!this->has_pending_exception() && |
07585870d15f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
7900
diff
changeset
|
1681 |
!java_lang_Thread::is_stillborn(this->threadObj())) { |
10739 | 1682 |
{ |
1683 |
ResourceMark rm(this); |
|
1684 |
this->set_native_thread_name(this->get_thread_name()); |
|
1685 |
} |
|
1 | 1686 |
HandleMark hm(this); |
1687 |
this->entry_point()(this, this); |
|
1688 |
} |
|
1689 |
||
1690 |
DTRACE_THREAD_PROBE(stop, this); |
|
1691 |
||
1692 |
this->exit(false); |
|
1693 |
delete this; |
|
1694 |
} |
|
1695 |
||
1696 |
||
1697 |
static void ensure_join(JavaThread* thread) { |
|
1698 |
// We do not need to grap the Threads_lock, since we are operating on ourself. |
|
1699 |
Handle threadObj(thread, thread->threadObj()); |
|
1700 |
assert(threadObj.not_null(), "java thread object must exist"); |
|
1701 |
ObjectLocker lock(threadObj, thread); |
|
1702 |
// Ignore pending exception (ThreadDeath), since we are exiting anyway |
|
1703 |
thread->clear_pending_exception(); |
|
1704 |
// Thread is exiting. So set thread_status field in java.lang.Thread class to TERMINATED. |
|
1705 |
java_lang_Thread::set_thread_status(threadObj(), java_lang_Thread::TERMINATED); |
|
8061
07585870d15f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
7900
diff
changeset
|
1706 |
// Clear the native thread instance - this makes isAlive return false and allows the join() |
07585870d15f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
7900
diff
changeset
|
1707 |
// to complete once we've done the notify_all below |
1 | 1708 |
java_lang_Thread::set_thread(threadObj(), NULL); |
1709 |
lock.notify_all(thread); |
|
1710 |
// Ignore pending exception (ThreadDeath), since we are exiting anyway |
|
1711 |
thread->clear_pending_exception(); |
|
1712 |
} |
|
1713 |
||
1560
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1714 |
|
1 | 1715 |
// For any new cleanup additions, please check to see if they need to be applied to |
1716 |
// cleanup_failed_attach_current_thread as well. |
|
1717 |
void JavaThread::exit(bool destroy_vm, ExitType exit_type) { |
|
1718 |
assert(this == JavaThread::current(), "thread consistency check"); |
|
1719 |
if (!InitializeJavaLangSystem) return; |
|
1720 |
||
1721 |
HandleMark hm(this); |
|
1722 |
Handle uncaught_exception(this, this->pending_exception()); |
|
1723 |
this->clear_pending_exception(); |
|
1724 |
Handle threadObj(this, this->threadObj()); |
|
1725 |
assert(threadObj.not_null(), "Java thread object should be created"); |
|
1726 |
||
1727 |
if (get_thread_profiler() != NULL) { |
|
1728 |
get_thread_profiler()->disengage(); |
|
1729 |
ResourceMark rm; |
|
1730 |
get_thread_profiler()->print(get_thread_name()); |
|
1731 |
} |
|
1732 |
||
1733 |
||
1734 |
// FIXIT: This code should be moved into else part, when reliable 1.2/1.3 check is in place |
|
1735 |
{ |
|
1736 |
EXCEPTION_MARK; |
|
1737 |
||
1738 |
CLEAR_PENDING_EXCEPTION; |
|
1739 |
} |
|
1740 |
// FIXIT: The is_null check is only so it works better on JDK1.2 VM's. This |
|
1741 |
// has to be fixed by a runtime query method |
|
1742 |
if (!destroy_vm || JDK_Version::is_jdk12x_version()) { |
|
1743 |
// JSR-166: change call from from ThreadGroup.uncaughtException to |
|
1744 |
// java.lang.Thread.dispatchUncaughtException |
|
1745 |
if (uncaught_exception.not_null()) { |
|
1746 |
Handle group(this, java_lang_Thread::threadGroup(threadObj())); |
|
1747 |
{ |
|
1748 |
EXCEPTION_MARK; |
|
1749 |
// Check if the method Thread.dispatchUncaughtException() exists. If so |
|
1750 |
// call it. Otherwise we have an older library without the JSR-166 changes, |
|
1751 |
// so call ThreadGroup.uncaughtException() |
|
1752 |
KlassHandle recvrKlass(THREAD, threadObj->klass()); |
|
1753 |
CallInfo callinfo; |
|
4571 | 1754 |
KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
1 | 1755 |
LinkResolver::resolve_virtual_call(callinfo, threadObj, recvrKlass, thread_klass, |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1756 |
vmSymbols::dispatchUncaughtException_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1757 |
vmSymbols::throwable_void_signature(), |
1 | 1758 |
KlassHandle(), false, false, THREAD); |
1759 |
CLEAR_PENDING_EXCEPTION; |
|
1760 |
methodHandle method = callinfo.selected_method(); |
|
1761 |
if (method.not_null()) { |
|
1762 |
JavaValue result(T_VOID); |
|
1763 |
JavaCalls::call_virtual(&result, |
|
1764 |
threadObj, thread_klass, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1765 |
vmSymbols::dispatchUncaughtException_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1766 |
vmSymbols::throwable_void_signature(), |
1 | 1767 |
uncaught_exception, |
1768 |
THREAD); |
|
1769 |
} else { |
|
4571 | 1770 |
KlassHandle thread_group(THREAD, SystemDictionary::ThreadGroup_klass()); |
1 | 1771 |
JavaValue result(T_VOID); |
1772 |
JavaCalls::call_virtual(&result, |
|
1773 |
group, thread_group, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1774 |
vmSymbols::uncaughtException_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1775 |
vmSymbols::thread_throwable_void_signature(), |
1 | 1776 |
threadObj, // Arg 1 |
1777 |
uncaught_exception, // Arg 2 |
|
1778 |
THREAD); |
|
1779 |
} |
|
8115
1b3ccddac0ab
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
8076
diff
changeset
|
1780 |
if (HAS_PENDING_EXCEPTION) { |
1b3ccddac0ab
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
8076
diff
changeset
|
1781 |
ResourceMark rm(this); |
1b3ccddac0ab
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
8076
diff
changeset
|
1782 |
jio_fprintf(defaultStream::error_stream(), |
1b3ccddac0ab
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
8076
diff
changeset
|
1783 |
"\nException: %s thrown from the UncaughtExceptionHandler" |
1b3ccddac0ab
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
8076
diff
changeset
|
1784 |
" in thread \"%s\"\n", |
14488 | 1785 |
pending_exception()->klass()->external_name(), |
8115
1b3ccddac0ab
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
8076
diff
changeset
|
1786 |
get_thread_name()); |
1b3ccddac0ab
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
8076
diff
changeset
|
1787 |
CLEAR_PENDING_EXCEPTION; |
1b3ccddac0ab
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
8076
diff
changeset
|
1788 |
} |
1 | 1789 |
} |
1790 |
} |
|
1791 |
||
11480
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1792 |
// Called before the java thread exit since we want to read info |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1793 |
// from java_lang_Thread object |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1794 |
EVENT_BEGIN(TraceEventThreadEnd, event); |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1795 |
EVENT_COMMIT(event, |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1796 |
EVENT_SET(event, javalangthread, java_lang_Thread::thread_id(this->threadObj()))); |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1797 |
|
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1798 |
// Call after last event on thread |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1799 |
EVENT_THREAD_EXIT(this); |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
1800 |
|
1 | 1801 |
// Call Thread.exit(). We try 3 times in case we got another Thread.stop during |
1802 |
// the execution of the method. If that is not enough, then we don't really care. Thread.stop |
|
1803 |
// is deprecated anyhow. |
|
1804 |
{ int count = 3; |
|
1805 |
while (java_lang_Thread::threadGroup(threadObj()) != NULL && (count-- > 0)) { |
|
1806 |
EXCEPTION_MARK; |
|
1807 |
JavaValue result(T_VOID); |
|
4571 | 1808 |
KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
1 | 1809 |
JavaCalls::call_virtual(&result, |
1810 |
threadObj, thread_klass, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1811 |
vmSymbols::exit_method_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
1812 |
vmSymbols::void_method_signature(), |
1 | 1813 |
THREAD); |
1814 |
CLEAR_PENDING_EXCEPTION; |
|
1815 |
} |
|
1816 |
} |
|
1817 |
||
1818 |
// notify JVMTI |
|
1819 |
if (JvmtiExport::should_post_thread_life()) { |
|
1820 |
JvmtiExport::post_thread_end(this); |
|
1821 |
} |
|
1822 |
||
1823 |
// We have notified the agents that we are exiting, before we go on, |
|
1824 |
// we must check for a pending external suspend request and honor it |
|
1825 |
// in order to not surprise the thread that made the suspend request. |
|
1826 |
while (true) { |
|
1827 |
{ |
|
1828 |
MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); |
|
1829 |
if (!is_external_suspend()) { |
|
1830 |
set_terminated(_thread_exiting); |
|
1831 |
ThreadService::current_thread_exiting(this); |
|
1832 |
break; |
|
1833 |
} |
|
1834 |
// Implied else: |
|
1835 |
// Things get a little tricky here. We have a pending external |
|
1836 |
// suspend request, but we are holding the SR_lock so we |
|
1837 |
// can't just self-suspend. So we temporarily drop the lock |
|
1838 |
// and then self-suspend. |
|
1839 |
} |
|
1840 |
||
1841 |
ThreadBlockInVM tbivm(this); |
|
1842 |
java_suspend_self(); |
|
1843 |
||
1844 |
// We're done with this suspend request, but we have to loop around |
|
1845 |
// and check again. Eventually we will get SR_lock without a pending |
|
1846 |
// external suspend request and will be able to mark ourselves as |
|
1847 |
// exiting. |
|
1848 |
} |
|
1849 |
// no more external suspends are allowed at this point |
|
1850 |
} else { |
|
1851 |
// before_exit() has already posted JVMTI THREAD_END events |
|
1852 |
} |
|
1853 |
||
1854 |
// Notify waiters on thread object. This has to be done after exit() is called |
|
1855 |
// on the thread (if the thread is the last thread in a daemon ThreadGroup the |
|
1856 |
// group should have the destroyed bit set before waiters are notified). |
|
1857 |
ensure_join(this); |
|
1858 |
assert(!this->has_pending_exception(), "ensure_join should have cleared"); |
|
1859 |
||
1860 |
// 6282335 JNI DetachCurrentThread spec states that all Java monitors |
|
1861 |
// held by this thread must be released. A detach operation must only |
|
1862 |
// get here if there are no Java frames on the stack. Therefore, any |
|
1863 |
// owned monitors at this point MUST be JNI-acquired monitors which are |
|
1864 |
// pre-inflated and in the monitor cache. |
|
1865 |
// |
|
1866 |
// ensure_join() ignores IllegalThreadStateExceptions, and so does this. |
|
1867 |
if (exit_type == jni_detach && JNIDetachReleasesMonitors) { |
|
1868 |
assert(!this->has_last_Java_frame(), "detaching with Java frames?"); |
|
1869 |
ObjectSynchronizer::release_monitors_owned_by_thread(this); |
|
1870 |
assert(!this->has_pending_exception(), "release_monitors should have cleared"); |
|
1871 |
} |
|
1872 |
||
1873 |
// These things needs to be done while we are still a Java Thread. Make sure that thread |
|
1874 |
// is in a consistent state, in case GC happens |
|
1875 |
assert(_privileged_stack_top == NULL, "must be NULL when we get here"); |
|
1876 |
||
1877 |
if (active_handles() != NULL) { |
|
1878 |
JNIHandleBlock* block = active_handles(); |
|
1879 |
set_active_handles(NULL); |
|
1880 |
JNIHandleBlock::release_block(block); |
|
1881 |
} |
|
1882 |
||
1883 |
if (free_handle_block() != NULL) { |
|
1884 |
JNIHandleBlock* block = free_handle_block(); |
|
1885 |
set_free_handle_block(NULL); |
|
1886 |
JNIHandleBlock::release_block(block); |
|
1887 |
} |
|
1888 |
||
1889 |
// These have to be removed while this is still a valid thread. |
|
1890 |
remove_stack_guard_pages(); |
|
1891 |
||
1892 |
if (UseTLAB) { |
|
1893 |
tlab().make_parsable(true); // retire TLAB |
|
1894 |
} |
|
1895 |
||
7897
201a8b00ec91
6814943: getcpool001 catches more than one JvmtiThreadState problem
kamg
parents:
7724
diff
changeset
|
1896 |
if (JvmtiEnv::environments_might_exist()) { |
222
3d1795325749
6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents:
1
diff
changeset
|
1897 |
JvmtiExport::cleanup_thread(this); |
3d1795325749
6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents:
1
diff
changeset
|
1898 |
} |
3d1795325749
6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents:
1
diff
changeset
|
1899 |
|
1560
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1900 |
#ifndef SERIALGC |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1901 |
// We must flush G1-related buffers before removing a thread from |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1902 |
// the list of active threads. |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1903 |
if (UseG1GC) { |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1904 |
flush_barrier_queues(); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1905 |
} |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1906 |
#endif |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1907 |
|
1 | 1908 |
// Remove from list of active threads list, and notify VM thread if we are the last non-daemon thread |
1909 |
Threads::remove(this); |
|
1910 |
} |
|
1911 |
||
1560
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1912 |
#ifndef SERIALGC |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1913 |
// Flush G1-related queues. |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1914 |
void JavaThread::flush_barrier_queues() { |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1915 |
satb_mark_queue().flush(); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1916 |
dirty_card_queue().flush(); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1917 |
} |
6768
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1918 |
|
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1919 |
void JavaThread::initialize_queues() { |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1920 |
assert(!SafepointSynchronize::is_at_safepoint(), |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1921 |
"we should not be at a safepoint"); |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1922 |
|
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1923 |
ObjPtrQueue& satb_queue = satb_mark_queue(); |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1924 |
SATBMarkQueueSet& satb_queue_set = satb_mark_queue_set(); |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1925 |
// The SATB queue should have been constructed with its active |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1926 |
// field set to false. |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1927 |
assert(!satb_queue.is_active(), "SATB queue should not be active"); |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1928 |
assert(satb_queue.is_empty(), "SATB queue should be empty"); |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1929 |
// If we are creating the thread during a marking cycle, we should |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1930 |
// set the active field of the SATB queue to true. |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1931 |
if (satb_queue_set.is_active()) { |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1932 |
satb_queue.set_active(true); |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1933 |
} |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1934 |
|
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1935 |
DirtyCardQueue& dirty_queue = dirty_card_queue(); |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1936 |
// The dirty card queue should have been constructed with its |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1937 |
// active field set to true. |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1938 |
assert(dirty_queue.is_active(), "dirty card queue should be active"); |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1939 |
} |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
1940 |
#endif // !SERIALGC |
1560
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1941 |
|
1 | 1942 |
void JavaThread::cleanup_failed_attach_current_thread() { |
1560
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1943 |
if (get_thread_profiler() != NULL) { |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1944 |
get_thread_profiler()->disengage(); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1945 |
ResourceMark rm; |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1946 |
get_thread_profiler()->print(get_thread_name()); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1947 |
} |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1948 |
|
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1949 |
if (active_handles() != NULL) { |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1950 |
JNIHandleBlock* block = active_handles(); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1951 |
set_active_handles(NULL); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1952 |
JNIHandleBlock::release_block(block); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1953 |
} |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1954 |
|
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1955 |
if (free_handle_block() != NULL) { |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1956 |
JNIHandleBlock* block = free_handle_block(); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1957 |
set_free_handle_block(NULL); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1958 |
JNIHandleBlock::release_block(block); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1959 |
} |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1960 |
|
5041
5bce37d77dde
6914050: jvm assertion "guard pages must be in use" in -Xcomp mode
coleenp
parents:
4761
diff
changeset
|
1961 |
// These have to be removed while this is still a valid thread. |
5bce37d77dde
6914050: jvm assertion "guard pages must be in use" in -Xcomp mode
coleenp
parents:
4761
diff
changeset
|
1962 |
remove_stack_guard_pages(); |
5bce37d77dde
6914050: jvm assertion "guard pages must be in use" in -Xcomp mode
coleenp
parents:
4761
diff
changeset
|
1963 |
|
1560
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1964 |
if (UseTLAB) { |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1965 |
tlab().make_parsable(true); // retire TLAB, if any |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1966 |
} |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1967 |
|
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1968 |
#ifndef SERIALGC |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1969 |
if (UseG1GC) { |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1970 |
flush_barrier_queues(); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1971 |
} |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1972 |
#endif |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1973 |
|
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1974 |
Threads::remove(this); |
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1975 |
delete this; |
1 | 1976 |
} |
1977 |
||
1978 |
||
1560
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1979 |
|
1b328492b7f8
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
1415
diff
changeset
|
1980 |
|
1 | 1981 |
JavaThread* JavaThread::active() { |
1982 |
Thread* thread = ThreadLocalStorage::thread(); |
|
1983 |
assert(thread != NULL, "just checking"); |
|
1984 |
if (thread->is_Java_thread()) { |
|
1985 |
return (JavaThread*) thread; |
|
1986 |
} else { |
|
1987 |
assert(thread->is_VM_thread(), "this must be a vm thread"); |
|
1988 |
VM_Operation* op = ((VMThread*) thread)->vm_operation(); |
|
1989 |
JavaThread *ret=op == NULL ? NULL : (JavaThread *)op->calling_thread(); |
|
1990 |
assert(ret->is_Java_thread(), "must be a Java thread"); |
|
1991 |
return ret; |
|
1992 |
} |
|
1993 |
} |
|
1994 |
||
1995 |
bool JavaThread::is_lock_owned(address adr) const { |
|
2526
39a58a50be35
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
2336
diff
changeset
|
1996 |
if (Thread::is_lock_owned(adr)) return true; |
1 | 1997 |
|
1998 |
for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { |
|
1999 |
if (chunk->contains(adr)) return true; |
|
2000 |
} |
|
2001 |
||
2002 |
return false; |
|
2003 |
} |
|
2004 |
||
2005 |
||
2006 |
void JavaThread::add_monitor_chunk(MonitorChunk* chunk) { |
|
2007 |
chunk->set_next(monitor_chunks()); |
|
2008 |
set_monitor_chunks(chunk); |
|
2009 |
} |
|
2010 |
||
2011 |
void JavaThread::remove_monitor_chunk(MonitorChunk* chunk) { |
|
2012 |
guarantee(monitor_chunks() != NULL, "must be non empty"); |
|
2013 |
if (monitor_chunks() == chunk) { |
|
2014 |
set_monitor_chunks(chunk->next()); |
|
2015 |
} else { |
|
2016 |
MonitorChunk* prev = monitor_chunks(); |
|
2017 |
while (prev->next() != chunk) prev = prev->next(); |
|
2018 |
prev->set_next(chunk->next()); |
|
2019 |
} |
|
2020 |
} |
|
2021 |
||
2022 |
// JVM support. |
|
2023 |
||
2024 |
// Note: this function shouldn't block if it's called in |
|
2025 |
// _thread_in_native_trans state (such as from |
|
2026 |
// check_special_condition_for_native_trans()). |
|
2027 |
void JavaThread::check_and_handle_async_exceptions(bool check_unsafe_error) { |
|
2028 |
||
2029 |
if (has_last_Java_frame() && has_async_condition()) { |
|
2030 |
// If we are at a polling page safepoint (not a poll return) |
|
2031 |
// then we must defer async exception because live registers |
|
2032 |
// will be clobbered by the exception path. Poll return is |
|
2033 |
// ok because the call we a returning from already collides |
|
2034 |
// with exception handling registers and so there is no issue. |
|
2035 |
// (The exception handling path kills call result registers but |
|
2036 |
// this is ok since the exception kills the result anyway). |
|
2037 |
||
2038 |
if (is_at_poll_safepoint()) { |
|
2039 |
// if the code we are returning to has deoptimized we must defer |
|
2040 |
// the exception otherwise live registers get clobbered on the |
|
2041 |
// exception path before deoptimization is able to retrieve them. |
|
2042 |
// |
|
2043 |
RegisterMap map(this, false); |
|
2044 |
frame caller_fr = last_frame().sender(&map); |
|
2045 |
assert(caller_fr.is_compiled_frame(), "what?"); |
|
2046 |
if (caller_fr.is_deoptimized_frame()) { |
|
2047 |
if (TraceExceptions) { |
|
2048 |
ResourceMark rm; |
|
2049 |
tty->print_cr("deferred async exception at compiled safepoint"); |
|
2050 |
} |
|
2051 |
return; |
|
2052 |
} |
|
2053 |
} |
|
2054 |
} |
|
2055 |
||
2056 |
JavaThread::AsyncRequests condition = clear_special_runtime_exit_condition(); |
|
2057 |
if (condition == _no_async_condition) { |
|
2058 |
// Conditions have changed since has_special_runtime_exit_condition() |
|
2059 |
// was called: |
|
2060 |
// - if we were here only because of an external suspend request, |
|
2061 |
// then that was taken care of above (or cancelled) so we are done |
|
2062 |
// - if we were here because of another async request, then it has |
|
2063 |
// been cleared between the has_special_runtime_exit_condition() |
|
2064 |
// and now so again we are done |
|
2065 |
return; |
|
2066 |
} |
|
2067 |
||
2068 |
// Check for pending async. exception |
|
2069 |
if (_pending_async_exception != NULL) { |
|
2070 |
// Only overwrite an already pending exception, if it is not a threadDeath. |
|
4571 | 2071 |
if (!has_pending_exception() || !pending_exception()->is_a(SystemDictionary::ThreadDeath_klass())) { |
1 | 2072 |
|
2073 |
// We cannot call Exceptions::_throw(...) here because we cannot block |
|
2074 |
set_pending_exception(_pending_async_exception, __FILE__, __LINE__); |
|
2075 |
||
2076 |
if (TraceExceptions) { |
|
2077 |
ResourceMark rm; |
|
2078 |
tty->print("Async. exception installed at runtime exit (" INTPTR_FORMAT ")", this); |
|
2079 |
if (has_last_Java_frame() ) { |
|
2080 |
frame f = last_frame(); |
|
2081 |
tty->print(" (pc: " INTPTR_FORMAT " sp: " INTPTR_FORMAT " )", f.pc(), f.sp()); |
|
2082 |
} |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2083 |
tty->print_cr(" of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
1 | 2084 |
} |
2085 |
_pending_async_exception = NULL; |
|
2086 |
clear_has_async_exception(); |
|
2087 |
} |
|
2088 |
} |
|
2089 |
||
2090 |
if (check_unsafe_error && |
|
2091 |
condition == _async_unsafe_access_error && !has_pending_exception()) { |
|
2092 |
condition = _no_async_condition; // done |
|
2093 |
switch (thread_state()) { |
|
2094 |
case _thread_in_vm: |
|
2095 |
{ |
|
2096 |
JavaThread* THREAD = this; |
|
2097 |
THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); |
|
2098 |
} |
|
2099 |
case _thread_in_native: |
|
2100 |
{ |
|
2101 |
ThreadInVMfromNative tiv(this); |
|
2102 |
JavaThread* THREAD = this; |
|
2103 |
THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); |
|
2104 |
} |
|
2105 |
case _thread_in_Java: |
|
2106 |
{ |
|
2107 |
ThreadInVMfromJava tiv(this); |
|
2108 |
JavaThread* THREAD = this; |
|
2109 |
THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in a recent unsafe memory access operation in compiled Java code"); |
|
2110 |
} |
|
2111 |
default: |
|
2112 |
ShouldNotReachHere(); |
|
2113 |
} |
|
2114 |
} |
|
2115 |
||
2116 |
assert(condition == _no_async_condition || has_pending_exception() || |
|
2117 |
(!check_unsafe_error && condition == _async_unsafe_access_error), |
|
2118 |
"must have handled the async condition, if no exception"); |
|
2119 |
} |
|
2120 |
||
2121 |
void JavaThread::handle_special_runtime_exit_condition(bool check_asyncs) { |
|
2122 |
// |
|
2123 |
// Check for pending external suspend. Internal suspend requests do |
|
2124 |
// not use handle_special_runtime_exit_condition(). |
|
2125 |
// If JNIEnv proxies are allowed, don't self-suspend if the target |
|
2126 |
// thread is not the current thread. In older versions of jdbx, jdbx |
|
2127 |
// threads could call into the VM with another thread's JNIEnv so we |
|
2128 |
// can be here operating on behalf of a suspended thread (4432884). |
|
2129 |
bool do_self_suspend = is_external_suspend_with_lock(); |
|
2130 |
if (do_self_suspend && (!AllowJNIEnvProxy || this == JavaThread::current())) { |
|
2131 |
// |
|
2132 |
// Because thread is external suspended the safepoint code will count |
|
2133 |
// thread as at a safepoint. This can be odd because we can be here |
|
2134 |
// as _thread_in_Java which would normally transition to _thread_blocked |
|
2135 |
// at a safepoint. We would like to mark the thread as _thread_blocked |
|
2136 |
// before calling java_suspend_self like all other callers of it but |
|
2137 |
// we must then observe proper safepoint protocol. (We can't leave |
|
2138 |
// _thread_blocked with a safepoint in progress). However we can be |
|
2139 |
// here as _thread_in_native_trans so we can't use a normal transition |
|
2140 |
// constructor/destructor pair because they assert on that type of |
|
2141 |
// transition. We could do something like: |
|
2142 |
// |
|
2143 |
// JavaThreadState state = thread_state(); |
|
2144 |
// set_thread_state(_thread_in_vm); |
|
2145 |
// { |
|
2146 |
// ThreadBlockInVM tbivm(this); |
|
2147 |
// java_suspend_self() |
|
2148 |
// } |
|
2149 |
// set_thread_state(_thread_in_vm_trans); |
|
2150 |
// if (safepoint) block; |
|
2151 |
// set_thread_state(state); |
|
2152 |
// |
|
2153 |
// but that is pretty messy. Instead we just go with the way the |
|
2154 |
// code has worked before and note that this is the only path to |
|
2155 |
// java_suspend_self that doesn't put the thread in _thread_blocked |
|
2156 |
// mode. |
|
2157 |
||
2158 |
frame_anchor()->make_walkable(this); |
|
2159 |
java_suspend_self(); |
|
2160 |
||
2161 |
// We might be here for reasons in addition to the self-suspend request |
|
2162 |
// so check for other async requests. |
|
2163 |
} |
|
2164 |
||
2165 |
if (check_asyncs) { |
|
2166 |
check_and_handle_async_exceptions(); |
|
2167 |
} |
|
2168 |
} |
|
2169 |
||
2170 |
void JavaThread::send_thread_stop(oop java_throwable) { |
|
2171 |
assert(Thread::current()->is_VM_thread(), "should be in the vm thread"); |
|
2172 |
assert(Threads_lock->is_locked(), "Threads_lock should be locked by safepoint code"); |
|
2173 |
assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); |
|
2174 |
||
2175 |
// Do not throw asynchronous exceptions against the compiler thread |
|
2176 |
// (the compiler thread should not be a Java thread -- fix in 1.4.2) |
|
2177 |
if (is_Compiler_thread()) return; |
|
2178 |
||
2179 |
{ |
|
2180 |
// Actually throw the Throwable against the target Thread - however |
|
2181 |
// only if there is no thread death exception installed already. |
|
4571 | 2182 |
if (_pending_async_exception == NULL || !_pending_async_exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
1 | 2183 |
// If the topmost frame is a runtime stub, then we are calling into |
2184 |
// OptoRuntime from compiled code. Some runtime stubs (new, monitor_exit..) |
|
2185 |
// must deoptimize the caller before continuing, as the compiled exception handler table |
|
2186 |
// may not be valid |
|
2187 |
if (has_last_Java_frame()) { |
|
2188 |
frame f = last_frame(); |
|
2189 |
if (f.is_runtime_frame() || f.is_safepoint_blob_frame()) { |
|
2190 |
// BiasedLocking needs an updated RegisterMap for the revoke monitors pass |
|
2191 |
RegisterMap reg_map(this, UseBiasedLocking); |
|
2192 |
frame compiled_frame = f.sender(®_map); |
|
2193 |
if (compiled_frame.can_be_deoptimized()) { |
|
2194 |
Deoptimization::deoptimize(this, compiled_frame, ®_map); |
|
2195 |
} |
|
2196 |
} |
|
2197 |
} |
|
2198 |
||
2199 |
// Set async. pending exception in thread. |
|
2200 |
set_pending_async_exception(java_throwable); |
|
2201 |
||
2202 |
if (TraceExceptions) { |
|
2203 |
ResourceMark rm; |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2204 |
tty->print_cr("Pending Async. exception installed of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
1 | 2205 |
} |
2206 |
// for AbortVMOnException flag |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2207 |
NOT_PRODUCT(Exceptions::debug_check_abort(InstanceKlass::cast(_pending_async_exception->klass())->external_name())); |
1 | 2208 |
} |
2209 |
} |
|
2210 |
||
2211 |
||
2212 |
// Interrupt thread so it will wake up from a potential wait() |
|
2213 |
Thread::interrupt(this); |
|
2214 |
} |
|
2215 |
||
2216 |
// External suspension mechanism. |
|
2217 |
// |
|
2218 |
// Tell the VM to suspend a thread when ever it knows that it does not hold on |
|
2219 |
// to any VM_locks and it is at a transition |
|
2220 |
// Self-suspension will happen on the transition out of the vm. |
|
2221 |
// Catch "this" coming in from JNIEnv pointers when the thread has been freed |
|
2222 |
// |
|
2223 |
// Guarantees on return: |
|
2224 |
// + Target thread will not execute any new bytecode (that's why we need to |
|
2225 |
// force a safepoint) |
|
2226 |
// + Target thread will not enter any new monitors |
|
2227 |
// |
|
2228 |
void JavaThread::java_suspend() { |
|
2229 |
{ MutexLocker mu(Threads_lock); |
|
2230 |
if (!Threads::includes(this) || is_exiting() || this->threadObj() == NULL) { |
|
2231 |
return; |
|
2232 |
} |
|
2233 |
} |
|
2234 |
||
2235 |
{ MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); |
|
2236 |
if (!is_external_suspend()) { |
|
2237 |
// a racing resume has cancelled us; bail out now |
|
2238 |
return; |
|
2239 |
} |
|
2240 |
||
2241 |
// suspend is done |
|
2242 |
uint32_t debug_bits = 0; |
|
2243 |
// Warning: is_ext_suspend_completed() may temporarily drop the |
|
2244 |
// SR_lock to allow the thread to reach a stable thread state if |
|
2245 |
// it is currently in a transient thread state. |
|
2246 |
if (is_ext_suspend_completed(false /* !called_by_wait */, |
|
2247 |
SuspendRetryDelay, &debug_bits) ) { |
|
2248 |
return; |
|
2249 |
} |
|
2250 |
} |
|
2251 |
||
2252 |
VM_ForceSafepoint vm_suspend; |
|
2253 |
VMThread::execute(&vm_suspend); |
|
2254 |
} |
|
2255 |
||
2256 |
// Part II of external suspension. |
|
2257 |
// A JavaThread self suspends when it detects a pending external suspend |
|
2258 |
// request. This is usually on transitions. It is also done in places |
|
2259 |
// where continuing to the next transition would surprise the caller, |
|
2260 |
// e.g., monitor entry. |
|
2261 |
// |
|
2262 |
// Returns the number of times that the thread self-suspended. |
|
2263 |
// |
|
2264 |
// Note: DO NOT call java_suspend_self() when you just want to block current |
|
2265 |
// thread. java_suspend_self() is the second stage of cooperative |
|
2266 |
// suspension for external suspend requests and should only be used |
|
2267 |
// to complete an external suspend request. |
|
2268 |
// |
|
2269 |
int JavaThread::java_suspend_self() { |
|
2270 |
int ret = 0; |
|
2271 |
||
2272 |
// we are in the process of exiting so don't suspend |
|
2273 |
if (is_exiting()) { |
|
2274 |
clear_external_suspend(); |
|
2275 |
return ret; |
|
2276 |
} |
|
2277 |
||
2278 |
assert(_anchor.walkable() || |
|
2279 |
(is_Java_thread() && !((JavaThread*)this)->has_last_Java_frame()), |
|
2280 |
"must have walkable stack"); |
|
2281 |
||
2282 |
MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); |
|
2283 |
||
3826 | 2284 |
assert(!this->is_ext_suspended(), |
1 | 2285 |
"a thread trying to self-suspend should not already be suspended"); |
2286 |
||
2287 |
if (this->is_suspend_equivalent()) { |
|
2288 |
// If we are self-suspending as a result of the lifting of a |
|
2289 |
// suspend equivalent condition, then the suspend_equivalent |
|
2290 |
// flag is not cleared until we set the ext_suspended flag so |
|
2291 |
// that wait_for_ext_suspend_completion() returns consistent |
|
2292 |
// results. |
|
2293 |
this->clear_suspend_equivalent(); |
|
2294 |
} |
|
2295 |
||
2296 |
// A racing resume may have cancelled us before we grabbed SR_lock |
|
2297 |
// above. Or another external suspend request could be waiting for us |
|
2298 |
// by the time we return from SR_lock()->wait(). The thread |
|
2299 |
// that requested the suspension may already be trying to walk our |
|
2300 |
// stack and if we return now, we can change the stack out from under |
|
2301 |
// it. This would be a "bad thing (TM)" and cause the stack walker |
|
2302 |
// to crash. We stay self-suspended until there are no more pending |
|
2303 |
// external suspend requests. |
|
2304 |
while (is_external_suspend()) { |
|
2305 |
ret++; |
|
2306 |
this->set_ext_suspended(); |
|
2307 |
||
2308 |
// _ext_suspended flag is cleared by java_resume() |
|
2309 |
while (is_ext_suspended()) { |
|
2310 |
this->SR_lock()->wait(Mutex::_no_safepoint_check_flag); |
|
2311 |
} |
|
2312 |
} |
|
2313 |
||
2314 |
return ret; |
|
2315 |
} |
|
2316 |
||
2317 |
#ifdef ASSERT |
|
2318 |
// verify the JavaThread has not yet been published in the Threads::list, and |
|
2319 |
// hence doesn't need protection from concurrent access at this stage |
|
2320 |
void JavaThread::verify_not_published() { |
|
2321 |
if (!Threads_lock->owned_by_self()) { |
|
2322 |
MutexLockerEx ml(Threads_lock, Mutex::_no_safepoint_check_flag); |
|
2323 |
assert( !Threads::includes(this), |
|
2324 |
"java thread shouldn't have been published yet!"); |
|
2325 |
} |
|
2326 |
else { |
|
2327 |
assert( !Threads::includes(this), |
|
2328 |
"java thread shouldn't have been published yet!"); |
|
2329 |
} |
|
2330 |
} |
|
2331 |
#endif |
|
2332 |
||
2333 |
// Slow path when the native==>VM/Java barriers detect a safepoint is in |
|
2334 |
// progress or when _suspend_flags is non-zero. |
|
2335 |
// Current thread needs to self-suspend if there is a suspend request and/or |
|
2336 |
// block if a safepoint is in progress. |
|
2337 |
// Async exception ISN'T checked. |
|
2338 |
// Note only the ThreadInVMfromNative transition can call this function |
|
2339 |
// directly and when thread state is _thread_in_native_trans |
|
2340 |
void JavaThread::check_safepoint_and_suspend_for_native_trans(JavaThread *thread) { |
|
2341 |
assert(thread->thread_state() == _thread_in_native_trans, "wrong state"); |
|
2342 |
||
2343 |
JavaThread *curJT = JavaThread::current(); |
|
2344 |
bool do_self_suspend = thread->is_external_suspend(); |
|
2345 |
||
2346 |
assert(!curJT->has_last_Java_frame() || curJT->frame_anchor()->walkable(), "Unwalkable stack in native->vm transition"); |
|
2347 |
||
2348 |
// If JNIEnv proxies are allowed, don't self-suspend if the target |
|
2349 |
// thread is not the current thread. In older versions of jdbx, jdbx |
|
2350 |
// threads could call into the VM with another thread's JNIEnv so we |
|
2351 |
// can be here operating on behalf of a suspended thread (4432884). |
|
2352 |
if (do_self_suspend && (!AllowJNIEnvProxy || curJT == thread)) { |
|
2353 |
JavaThreadState state = thread->thread_state(); |
|
2354 |
||
2355 |
// We mark this thread_blocked state as a suspend-equivalent so |
|
2356 |
// that a caller to is_ext_suspend_completed() won't be confused. |
|
2357 |
// The suspend-equivalent state is cleared by java_suspend_self(). |
|
2358 |
thread->set_suspend_equivalent(); |
|
2359 |
||
2360 |
// If the safepoint code sees the _thread_in_native_trans state, it will |
|
2361 |
// wait until the thread changes to other thread state. There is no |
|
2362 |
// guarantee on how soon we can obtain the SR_lock and complete the |
|
2363 |
// self-suspend request. It would be a bad idea to let safepoint wait for |
|
2364 |
// too long. Temporarily change the state to _thread_blocked to |
|
2365 |
// let the VM thread know that this thread is ready for GC. The problem |
|
2366 |
// of changing thread state is that safepoint could happen just after |
|
2367 |
// java_suspend_self() returns after being resumed, and VM thread will |
|
2368 |
// see the _thread_blocked state. We must check for safepoint |
|
2369 |
// after restoring the state and make sure we won't leave while a safepoint |
|
2370 |
// is in progress. |
|
2371 |
thread->set_thread_state(_thread_blocked); |
|
2372 |
thread->java_suspend_self(); |
|
2373 |
thread->set_thread_state(state); |
|
2374 |
// Make sure new state is seen by VM thread |
|
2375 |
if (os::is_MP()) { |
|
2376 |
if (UseMembar) { |
|
2377 |
// Force a fence between the write above and read below |
|
2378 |
OrderAccess::fence(); |
|
2379 |
} else { |
|
2380 |
// Must use this rather than serialization page in particular on Windows |
|
2381 |
InterfaceSupport::serialize_memory(thread); |
|
2382 |
} |
|
2383 |
} |
|
2384 |
} |
|
2385 |
||
2386 |
if (SafepointSynchronize::do_call_back()) { |
|
2387 |
// If we are safepointing, then block the caller which may not be |
|
2388 |
// the same as the target thread (see above). |
|
2389 |
SafepointSynchronize::block(curJT); |
|
2390 |
} |
|
2391 |
||
2392 |
if (thread->is_deopt_suspend()) { |
|
2393 |
thread->clear_deopt_suspend(); |
|
2394 |
RegisterMap map(thread, false); |
|
2395 |
frame f = thread->last_frame(); |
|
2396 |
while ( f.id() != thread->must_deopt_id() && ! f.is_first_frame()) { |
|
2397 |
f = f.sender(&map); |
|
2398 |
} |
|
2399 |
if (f.id() == thread->must_deopt_id()) { |
|
2400 |
thread->clear_must_deopt_id(); |
|
6269
10e06287c0b0
6975006: assert(check.is_deoptimized_frame()) failed: missed deopt
never
parents:
6184
diff
changeset
|
2401 |
f.deoptimize(thread); |
1 | 2402 |
} else { |
2403 |
fatal("missed deoptimization!"); |
|
2404 |
} |
|
2405 |
} |
|
2406 |
} |
|
2407 |
||
2408 |
// Slow path when the native==>VM/Java barriers detect a safepoint is in |
|
2409 |
// progress or when _suspend_flags is non-zero. |
|
2410 |
// Current thread needs to self-suspend if there is a suspend request and/or |
|
2411 |
// block if a safepoint is in progress. |
|
2412 |
// Also check for pending async exception (not including unsafe access error). |
|
2413 |
// Note only the native==>VM/Java barriers can call this function and when |
|
2414 |
// thread state is _thread_in_native_trans. |
|
2415 |
void JavaThread::check_special_condition_for_native_trans(JavaThread *thread) { |
|
2416 |
check_safepoint_and_suspend_for_native_trans(thread); |
|
2417 |
||
2418 |
if (thread->has_async_exception()) { |
|
2419 |
// We are in _thread_in_native_trans state, don't handle unsafe |
|
2420 |
// access error since that may block. |
|
2421 |
thread->check_and_handle_async_exceptions(false); |
|
2422 |
} |
|
2423 |
} |
|
2424 |
||
11637
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2425 |
// This is a variant of the normal |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2426 |
// check_special_condition_for_native_trans with slightly different |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2427 |
// semantics for use by critical native wrappers. It does all the |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2428 |
// normal checks but also performs the transition back into |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2429 |
// thread_in_Java state. This is required so that critical natives |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2430 |
// can potentially block and perform a GC if they are the last thread |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2431 |
// exiting the GC_locker. |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2432 |
void JavaThread::check_special_condition_for_native_trans_and_transition(JavaThread *thread) { |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2433 |
check_special_condition_for_native_trans(thread); |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2434 |
|
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2435 |
// Finish the transition |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2436 |
thread->set_thread_state(_thread_in_Java); |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2437 |
|
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2438 |
if (thread->do_critical_native_unlock()) { |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2439 |
ThreadInVMfromJavaNoAsyncException tiv(thread); |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2440 |
GC_locker::unlock_critical(thread); |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2441 |
thread->clear_critical_native_unlock(); |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2442 |
} |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2443 |
} |
030466036615
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
11636
diff
changeset
|
2444 |
|
1 | 2445 |
// We need to guarantee the Threads_lock here, since resumes are not |
2446 |
// allowed during safepoint synchronization |
|
2447 |
// Can only resume from an external suspension |
|
2448 |
void JavaThread::java_resume() { |
|
2449 |
assert_locked_or_safepoint(Threads_lock); |
|
2450 |
||
2451 |
// Sanity check: thread is gone, has started exiting or the thread |
|
2452 |
// was not externally suspended. |
|
2453 |
if (!Threads::includes(this) || is_exiting() || !is_external_suspend()) { |
|
2454 |
return; |
|
2455 |
} |
|
2456 |
||
2457 |
MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); |
|
2458 |
||
2459 |
clear_external_suspend(); |
|
2460 |
||
2461 |
if (is_ext_suspended()) { |
|
2462 |
clear_ext_suspended(); |
|
2463 |
SR_lock()->notify_all(); |
|
2464 |
} |
|
2465 |
} |
|
2466 |
||
2467 |
void JavaThread::create_stack_guard_pages() { |
|
2468 |
if (! os::uses_stack_guard_pages() || _stack_guard_state != stack_guard_unused) return; |
|
2469 |
address low_addr = stack_base() - stack_size(); |
|
2470 |
size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); |
|
2471 |
||
2472 |
int allocate = os::allocate_stack_guard_pages(); |
|
2473 |
// warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len); |
|
2474 |
||
5085
4f0c435f8c3c
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
5041
diff
changeset
|
2475 |
if (allocate && !os::create_stack_guard_pages((char *) low_addr, len)) { |
1 | 2476 |
warning("Attempt to allocate stack guard pages failed."); |
2477 |
return; |
|
2478 |
} |
|
2479 |
||
2480 |
if (os::guard_memory((char *) low_addr, len)) { |
|
2481 |
_stack_guard_state = stack_guard_enabled; |
|
2482 |
} else { |
|
2483 |
warning("Attempt to protect stack guard pages failed."); |
|
2484 |
if (os::uncommit_memory((char *) low_addr, len)) { |
|
2485 |
warning("Attempt to deallocate stack guard pages failed."); |
|
2486 |
} |
|
2487 |
} |
|
2488 |
} |
|
2489 |
||
2490 |
void JavaThread::remove_stack_guard_pages() { |
|
14120
7d298141c258
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
14083
diff
changeset
|
2491 |
assert(Thread::current() == this, "from different thread"); |
1 | 2492 |
if (_stack_guard_state == stack_guard_unused) return; |
2493 |
address low_addr = stack_base() - stack_size(); |
|
2494 |
size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); |
|
2495 |
||
2496 |
if (os::allocate_stack_guard_pages()) { |
|
5085
4f0c435f8c3c
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
5041
diff
changeset
|
2497 |
if (os::remove_stack_guard_pages((char *) low_addr, len)) { |
1 | 2498 |
_stack_guard_state = stack_guard_unused; |
2499 |
} else { |
|
2500 |
warning("Attempt to deallocate stack guard pages failed."); |
|
2501 |
} |
|
2502 |
} else { |
|
2503 |
if (_stack_guard_state == stack_guard_unused) return; |
|
2504 |
if (os::unguard_memory((char *) low_addr, len)) { |
|
2505 |
_stack_guard_state = stack_guard_unused; |
|
2506 |
} else { |
|
2507 |
warning("Attempt to unprotect stack guard pages failed."); |
|
2508 |
} |
|
2509 |
} |
|
2510 |
} |
|
2511 |
||
2512 |
void JavaThread::enable_stack_yellow_zone() { |
|
2513 |
assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); |
|
2514 |
assert(_stack_guard_state != stack_guard_enabled, "already enabled"); |
|
2515 |
||
2516 |
// The base notation is from the stacks point of view, growing downward. |
|
2517 |
// We need to adjust it to work correctly with guard_memory() |
|
2518 |
address base = stack_yellow_zone_base() - stack_yellow_zone_size(); |
|
2519 |
||
2520 |
guarantee(base < stack_base(),"Error calculating stack yellow zone"); |
|
2521 |
guarantee(base < os::current_stack_pointer(),"Error calculating stack yellow zone"); |
|
2522 |
||
2523 |
if (os::guard_memory((char *) base, stack_yellow_zone_size())) { |
|
2524 |
_stack_guard_state = stack_guard_enabled; |
|
2525 |
} else { |
|
2526 |
warning("Attempt to guard stack yellow zone failed."); |
|
2527 |
} |
|
2528 |
enable_register_stack_guard(); |
|
2529 |
} |
|
2530 |
||
2531 |
void JavaThread::disable_stack_yellow_zone() { |
|
2532 |
assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); |
|
2533 |
assert(_stack_guard_state != stack_guard_yellow_disabled, "already disabled"); |
|
2534 |
||
2535 |
// Simply return if called for a thread that does not use guard pages. |
|
2536 |
if (_stack_guard_state == stack_guard_unused) return; |
|
2537 |
||
2538 |
// The base notation is from the stacks point of view, growing downward. |
|
2539 |
// We need to adjust it to work correctly with guard_memory() |
|
2540 |
address base = stack_yellow_zone_base() - stack_yellow_zone_size(); |
|
2541 |
||
2542 |
if (os::unguard_memory((char *)base, stack_yellow_zone_size())) { |
|
2543 |
_stack_guard_state = stack_guard_yellow_disabled; |
|
2544 |
} else { |
|
2545 |
warning("Attempt to unguard stack yellow zone failed."); |
|
2546 |
} |
|
2547 |
disable_register_stack_guard(); |
|
2548 |
} |
|
2549 |
||
2550 |
void JavaThread::enable_stack_red_zone() { |
|
2551 |
// The base notation is from the stacks point of view, growing downward. |
|
2552 |
// We need to adjust it to work correctly with guard_memory() |
|
2553 |
assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); |
|
2554 |
address base = stack_red_zone_base() - stack_red_zone_size(); |
|
2555 |
||
2556 |
guarantee(base < stack_base(),"Error calculating stack red zone"); |
|
2557 |
guarantee(base < os::current_stack_pointer(),"Error calculating stack red zone"); |
|
2558 |
||
2559 |
if(!os::guard_memory((char *) base, stack_red_zone_size())) { |
|
2560 |
warning("Attempt to guard stack red zone failed."); |
|
2561 |
} |
|
2562 |
} |
|
2563 |
||
2564 |
void JavaThread::disable_stack_red_zone() { |
|
2565 |
// The base notation is from the stacks point of view, growing downward. |
|
2566 |
// We need to adjust it to work correctly with guard_memory() |
|
2567 |
assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); |
|
2568 |
address base = stack_red_zone_base() - stack_red_zone_size(); |
|
2569 |
if (!os::unguard_memory((char *)base, stack_red_zone_size())) { |
|
2570 |
warning("Attempt to unguard stack red zone failed."); |
|
2571 |
} |
|
2572 |
} |
|
2573 |
||
2574 |
void JavaThread::frames_do(void f(frame*, const RegisterMap* map)) { |
|
2575 |
// ignore is there is no stack |
|
2576 |
if (!has_last_Java_frame()) return; |
|
2577 |
// traverse the stack frames. Starts from top frame. |
|
2578 |
for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { |
|
2579 |
frame* fr = fst.current(); |
|
2580 |
f(fr, fst.register_map()); |
|
2581 |
} |
|
2582 |
} |
|
2583 |
||
2584 |
||
2585 |
#ifndef PRODUCT |
|
2586 |
// Deoptimization |
|
2587 |
// Function for testing deoptimization |
|
2588 |
void JavaThread::deoptimize() { |
|
2589 |
// BiasedLocking needs an updated RegisterMap for the revoke monitors pass |
|
2590 |
StackFrameStream fst(this, UseBiasedLocking); |
|
2591 |
bool deopt = false; // Dump stack only if a deopt actually happens. |
|
2592 |
bool only_at = strlen(DeoptimizeOnlyAt) > 0; |
|
2593 |
// Iterate over all frames in the thread and deoptimize |
|
2594 |
for(; !fst.is_done(); fst.next()) { |
|
2595 |
if(fst.current()->can_be_deoptimized()) { |
|
2596 |
||
2597 |
if (only_at) { |
|
2598 |
// Deoptimize only at particular bcis. DeoptimizeOnlyAt |
|
2599 |
// consists of comma or carriage return separated numbers so |
|
2600 |
// search for the current bci in that string. |
|
2601 |
address pc = fst.current()->pc(); |
|
2602 |
nmethod* nm = (nmethod*) fst.current()->cb(); |
|
2603 |
ScopeDesc* sd = nm->scope_desc_at( pc); |
|
2604 |
char buffer[8]; |
|
2605 |
jio_snprintf(buffer, sizeof(buffer), "%d", sd->bci()); |
|
2606 |
size_t len = strlen(buffer); |
|
2607 |
const char * found = strstr(DeoptimizeOnlyAt, buffer); |
|
2608 |
while (found != NULL) { |
|
2609 |
if ((found[len] == ',' || found[len] == '\n' || found[len] == '\0') && |
|
2610 |
(found == DeoptimizeOnlyAt || found[-1] == ',' || found[-1] == '\n')) { |
|
2611 |
// Check that the bci found is bracketed by terminators. |
|
2612 |
break; |
|
2613 |
} |
|
2614 |
found = strstr(found + 1, buffer); |
|
2615 |
} |
|
2616 |
if (!found) { |
|
2617 |
continue; |
|
2618 |
} |
|
2619 |
} |
|
2620 |
||
2621 |
if (DebugDeoptimization && !deopt) { |
|
2622 |
deopt = true; // One-time only print before deopt |
|
2623 |
tty->print_cr("[BEFORE Deoptimization]"); |
|
2624 |
trace_frames(); |
|
2625 |
trace_stack(); |
|
2626 |
} |
|
2627 |
Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); |
|
2628 |
} |
|
2629 |
} |
|
2630 |
||
2631 |
if (DebugDeoptimization && deopt) { |
|
2632 |
tty->print_cr("[AFTER Deoptimization]"); |
|
2633 |
trace_frames(); |
|
2634 |
} |
|
2635 |
} |
|
2636 |
||
2637 |
||
2638 |
// Make zombies |
|
2639 |
void JavaThread::make_zombies() { |
|
2640 |
for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { |
|
2641 |
if (fst.current()->can_be_deoptimized()) { |
|
2642 |
// it is a Java nmethod |
|
2643 |
nmethod* nm = CodeCache::find_nmethod(fst.current()->pc()); |
|
2644 |
nm->make_not_entrant(); |
|
2645 |
} |
|
2646 |
} |
|
2647 |
} |
|
2648 |
#endif // PRODUCT |
|
2649 |
||
2650 |
||
2651 |
void JavaThread::deoptimized_wrt_marked_nmethods() { |
|
2652 |
if (!has_last_Java_frame()) return; |
|
2653 |
// BiasedLocking needs an updated RegisterMap for the revoke monitors pass |
|
2654 |
StackFrameStream fst(this, UseBiasedLocking); |
|
2655 |
for(; !fst.is_done(); fst.next()) { |
|
2656 |
if (fst.current()->should_be_deoptimized()) { |
|
13964 | 2657 |
if (LogCompilation && xtty != NULL) { |
2658 |
nmethod* nm = fst.current()->cb()->as_nmethod_or_null(); |
|
2659 |
xtty->elem("deoptimized thread='" UINTX_FORMAT "' compile_id='%d'", |
|
2660 |
this->name(), nm != NULL ? nm->compile_id() : -1); |
|
2661 |
} |
|
2662 |
||
1 | 2663 |
Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); |
2664 |
} |
|
2665 |
} |
|
2666 |
} |
|
2667 |
||
2668 |
||
2669 |
// GC support |
|
2670 |
static void frame_gc_epilogue(frame* f, const RegisterMap* map) { f->gc_epilogue(); } |
|
2671 |
||
2672 |
void JavaThread::gc_epilogue() { |
|
2673 |
frames_do(frame_gc_epilogue); |
|
2674 |
} |
|
2675 |
||
2676 |
||
2677 |
static void frame_gc_prologue(frame* f, const RegisterMap* map) { f->gc_prologue(); } |
|
2678 |
||
2679 |
void JavaThread::gc_prologue() { |
|
2680 |
frames_do(frame_gc_prologue); |
|
2681 |
} |
|
2682 |
||
4489
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2683 |
// If the caller is a NamedThread, then remember, in the current scope, |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2684 |
// the given JavaThread in its _processed_thread field. |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2685 |
class RememberProcessedThread: public StackObj { |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2686 |
NamedThread* _cur_thr; |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2687 |
public: |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2688 |
RememberProcessedThread(JavaThread* jthr) { |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2689 |
Thread* thread = Thread::current(); |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2690 |
if (thread->is_Named_thread()) { |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2691 |
_cur_thr = (NamedThread *)thread; |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2692 |
_cur_thr->set_processed_thread(jthr); |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2693 |
} else { |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2694 |
_cur_thr = NULL; |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2695 |
} |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2696 |
} |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2697 |
|
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2698 |
~RememberProcessedThread() { |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2699 |
if (_cur_thr) { |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2700 |
_cur_thr->set_processed_thread(NULL); |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2701 |
} |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2702 |
} |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2703 |
}; |
1 | 2704 |
|
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
2705 |
void JavaThread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
4637 | 2706 |
// Verify that the deferred card marks have been flushed. |
2707 |
assert(deferred_card_mark().is_empty(), "Should be empty during GC"); |
|
4030
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3916
diff
changeset
|
2708 |
|
1 | 2709 |
// The ThreadProfiler oops_do is done from FlatProfiler::oops_do |
2710 |
// since there may be more than one thread using each ThreadProfiler. |
|
2711 |
||
2712 |
// Traverse the GCHandles |
|
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
2713 |
Thread::oops_do(f, cld_f, cf); |
1 | 2714 |
|
2715 |
assert( (!has_last_Java_frame() && java_call_counter() == 0) || |
|
2716 |
(has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); |
|
2717 |
||
2718 |
if (has_last_Java_frame()) { |
|
4489
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2719 |
// Record JavaThread to GC thread |
514173c9a0c2
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
4485
diff
changeset
|
2720 |
RememberProcessedThread rpt(this); |
1 | 2721 |
|
2722 |
// Traverse the privileged stack |
|
2723 |
if (_privileged_stack_top != NULL) { |
|
2724 |
_privileged_stack_top->oops_do(f); |
|
2725 |
} |
|
2726 |
||
2727 |
// traverse the registered growable array |
|
2728 |
if (_array_for_gc != NULL) { |
|
2729 |
for (int index = 0; index < _array_for_gc->length(); index++) { |
|
2730 |
f->do_oop(_array_for_gc->adr_at(index)); |
|
2731 |
} |
|
2732 |
} |
|
2733 |
||
2734 |
// Traverse the monitor chunks |
|
2735 |
for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { |
|
2736 |
chunk->oops_do(f); |
|
2737 |
} |
|
2738 |
||
2739 |
// Traverse the execution stack |
|
2740 |
for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { |
|
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
2741 |
fst.current()->oops_do(f, cld_f, cf, fst.register_map()); |
1 | 2742 |
} |
2743 |
} |
|
2744 |
||
2745 |
// callee_target is never live across a gc point so NULL it here should |
|
2746 |
// it still contain a methdOop. |
|
2747 |
||
2748 |
set_callee_target(NULL); |
|
2749 |
||
2750 |
assert(vframe_array_head() == NULL, "deopt in progress at a safepoint!"); |
|
2751 |
// If we have deferred set_locals there might be oops waiting to be |
|
2752 |
// written |
|
2753 |
GrowableArray<jvmtiDeferredLocalVariableSet*>* list = deferred_locals(); |
|
2754 |
if (list != NULL) { |
|
2755 |
for (int i = 0; i < list->length(); i++) { |
|
2756 |
list->at(i)->oops_do(f); |
|
2757 |
} |
|
2758 |
} |
|
2759 |
||
2760 |
// Traverse instance variables at the end since the GC may be moving things |
|
2761 |
// around using this function |
|
2762 |
f->do_oop((oop*) &_threadObj); |
|
2763 |
f->do_oop((oop*) &_vm_result); |
|
2764 |
f->do_oop((oop*) &_exception_oop); |
|
2765 |
f->do_oop((oop*) &_pending_async_exception); |
|
2766 |
||
2767 |
if (jvmti_thread_state() != NULL) { |
|
2768 |
jvmti_thread_state()->oops_do(f); |
|
2769 |
} |
|
2770 |
} |
|
2771 |
||
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3261
diff
changeset
|
2772 |
void JavaThread::nmethods_do(CodeBlobClosure* cf) { |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3261
diff
changeset
|
2773 |
Thread::nmethods_do(cf); // (super method is a no-op) |
1 | 2774 |
|
2775 |
assert( (!has_last_Java_frame() && java_call_counter() == 0) || |
|
2776 |
(has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); |
|
2777 |
||
2778 |
if (has_last_Java_frame()) { |
|
2779 |
// Traverse the execution stack |
|
2780 |
for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { |
|
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3261
diff
changeset
|
2781 |
fst.current()->nmethods_do(cf); |
1 | 2782 |
} |
2783 |
} |
|
2784 |
} |
|
2785 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2786 |
void JavaThread::metadata_do(void f(Metadata*)) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2787 |
Thread::metadata_do(f); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2788 |
if (has_last_Java_frame()) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2789 |
// Traverse the execution stack to call f() on the methods in the stack |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2790 |
for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2791 |
fst.current()->metadata_do(f); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2792 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2793 |
} else if (is_Compiler_thread()) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2794 |
// need to walk ciMetadata in current compile tasks to keep alive. |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2795 |
CompilerThread* ct = (CompilerThread*)this; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2796 |
if (ct->env() != NULL) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2797 |
ct->env()->metadata_do(f); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2798 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2799 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2800 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2801 |
|
1 | 2802 |
// Printing |
2803 |
const char* _get_thread_state_name(JavaThreadState _thread_state) { |
|
2804 |
switch (_thread_state) { |
|
2805 |
case _thread_uninitialized: return "_thread_uninitialized"; |
|
2806 |
case _thread_new: return "_thread_new"; |
|
2807 |
case _thread_new_trans: return "_thread_new_trans"; |
|
2808 |
case _thread_in_native: return "_thread_in_native"; |
|
2809 |
case _thread_in_native_trans: return "_thread_in_native_trans"; |
|
2810 |
case _thread_in_vm: return "_thread_in_vm"; |
|
2811 |
case _thread_in_vm_trans: return "_thread_in_vm_trans"; |
|
2812 |
case _thread_in_Java: return "_thread_in_Java"; |
|
2813 |
case _thread_in_Java_trans: return "_thread_in_Java_trans"; |
|
2814 |
case _thread_blocked: return "_thread_blocked"; |
|
2815 |
case _thread_blocked_trans: return "_thread_blocked_trans"; |
|
2816 |
default: return "unknown thread state"; |
|
2817 |
} |
|
2818 |
} |
|
2819 |
||
2820 |
#ifndef PRODUCT |
|
2821 |
void JavaThread::print_thread_state_on(outputStream *st) const { |
|
2822 |
st->print_cr(" JavaThread state: %s", _get_thread_state_name(_thread_state)); |
|
2823 |
}; |
|
2824 |
void JavaThread::print_thread_state() const { |
|
2825 |
print_thread_state_on(tty); |
|
2826 |
}; |
|
2827 |
#endif // PRODUCT |
|
2828 |
||
2829 |
// Called by Threads::print() for VM_PrintThreads operation |
|
2830 |
void JavaThread::print_on(outputStream *st) const { |
|
2831 |
st->print("\"%s\" ", get_thread_name()); |
|
2832 |
oop thread_oop = threadObj(); |
|
13857 | 2833 |
if (thread_oop != NULL) { |
2834 |
st->print("#" INT64_FORMAT " ", java_lang_Thread::thread_id(thread_oop)); |
|
2835 |
if (java_lang_Thread::is_daemon(thread_oop)) st->print("daemon "); |
|
2836 |
st->print("prio=%d ", java_lang_Thread::priority(thread_oop)); |
|
2837 |
} |
|
1 | 2838 |
Thread::print_on(st); |
2839 |
// print guess for valid stack memory region (assume 4K pages); helps lock debugging |
|
2526
39a58a50be35
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
2336
diff
changeset
|
2840 |
st->print_cr("[" INTPTR_FORMAT "]", (intptr_t)last_Java_sp() & ~right_n_bits(12)); |
1 | 2841 |
if (thread_oop != NULL && JDK_Version::is_gte_jdk15x_version()) { |
2842 |
st->print_cr(" java.lang.Thread.State: %s", java_lang_Thread::thread_status_name(thread_oop)); |
|
2843 |
} |
|
2844 |
#ifndef PRODUCT |
|
2845 |
print_thread_state_on(st); |
|
2846 |
_safepoint_state->print_on(st); |
|
2847 |
#endif // PRODUCT |
|
2848 |
} |
|
2849 |
||
2850 |
// Called by fatal error handler. The difference between this and |
|
2851 |
// JavaThread::print() is that we can't grab lock or allocate memory. |
|
2852 |
void JavaThread::print_on_error(outputStream* st, char *buf, int buflen) const { |
|
2853 |
st->print("JavaThread \"%s\"", get_thread_name_string(buf, buflen)); |
|
2854 |
oop thread_obj = threadObj(); |
|
2855 |
if (thread_obj != NULL) { |
|
2856 |
if (java_lang_Thread::is_daemon(thread_obj)) st->print(" daemon"); |
|
2857 |
} |
|
2858 |
st->print(" ["); |
|
2859 |
st->print("%s", _get_thread_state_name(_thread_state)); |
|
2860 |
if (osthread()) { |
|
2861 |
st->print(", id=%d", osthread()->thread_id()); |
|
2862 |
} |
|
2863 |
st->print(", stack(" PTR_FORMAT "," PTR_FORMAT ")", |
|
2864 |
_stack_base - _stack_size, _stack_base); |
|
2865 |
st->print("]"); |
|
2866 |
return; |
|
2867 |
} |
|
2868 |
||
2869 |
// Verification |
|
2870 |
||
2871 |
static void frame_verify(frame* f, const RegisterMap *map) { f->verify(map); } |
|
2872 |
||
2873 |
void JavaThread::verify() { |
|
2874 |
// Verify oops in the thread. |
|
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
2875 |
oops_do(&VerifyOopClosure::verify_oop, NULL, NULL); |
1 | 2876 |
|
2877 |
// Verify the stack frames. |
|
2878 |
frames_do(frame_verify); |
|
2879 |
} |
|
2880 |
||
2881 |
// CR 6300358 (sub-CR 2137150) |
|
2882 |
// Most callers of this method assume that it can't return NULL but a |
|
2883 |
// thread may not have a name whilst it is in the process of attaching to |
|
2884 |
// the VM - see CR 6412693, and there are places where a JavaThread can be |
|
2885 |
// seen prior to having it's threadObj set (eg JNI attaching threads and |
|
2886 |
// if vm exit occurs during initialization). These cases can all be accounted |
|
2887 |
// for such that this method never returns NULL. |
|
2888 |
const char* JavaThread::get_thread_name() const { |
|
2889 |
#ifdef ASSERT |
|
2890 |
// early safepoints can hit while current thread does not yet have TLS |
|
2891 |
if (!SafepointSynchronize::is_at_safepoint()) { |
|
2892 |
Thread *cur = Thread::current(); |
|
2893 |
if (!(cur->is_Java_thread() && cur == this)) { |
|
2894 |
// Current JavaThreads are allowed to get their own name without |
|
2895 |
// the Threads_lock. |
|
2896 |
assert_locked_or_safepoint(Threads_lock); |
|
2897 |
} |
|
2898 |
} |
|
2899 |
#endif // ASSERT |
|
2900 |
return get_thread_name_string(); |
|
2901 |
} |
|
2902 |
||
2903 |
// Returns a non-NULL representation of this thread's name, or a suitable |
|
2904 |
// descriptive string if there is no set name |
|
2905 |
const char* JavaThread::get_thread_name_string(char* buf, int buflen) const { |
|
2906 |
const char* name_str; |
|
2907 |
oop thread_obj = threadObj(); |
|
2908 |
if (thread_obj != NULL) { |
|
2909 |
typeArrayOop name = java_lang_Thread::name(thread_obj); |
|
2910 |
if (name != NULL) { |
|
2911 |
if (buf == NULL) { |
|
2912 |
name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); |
|
2913 |
} |
|
2914 |
else { |
|
2915 |
name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length(), buf, buflen); |
|
2916 |
} |
|
2917 |
} |
|
10739 | 2918 |
else if (is_attaching_via_jni()) { // workaround for 6412693 - see 6404306 |
1 | 2919 |
name_str = "<no-name - thread is attaching>"; |
2920 |
} |
|
2921 |
else { |
|
2922 |
name_str = Thread::name(); |
|
2923 |
} |
|
2924 |
} |
|
2925 |
else { |
|
2926 |
name_str = Thread::name(); |
|
2927 |
} |
|
2928 |
assert(name_str != NULL, "unexpected NULL thread name"); |
|
2929 |
return name_str; |
|
2930 |
} |
|
2931 |
||
2932 |
||
2933 |
const char* JavaThread::get_threadgroup_name() const { |
|
2934 |
debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) |
|
2935 |
oop thread_obj = threadObj(); |
|
2936 |
if (thread_obj != NULL) { |
|
2937 |
oop thread_group = java_lang_Thread::threadGroup(thread_obj); |
|
2938 |
if (thread_group != NULL) { |
|
2939 |
typeArrayOop name = java_lang_ThreadGroup::name(thread_group); |
|
2940 |
// ThreadGroup.name can be null |
|
2941 |
if (name != NULL) { |
|
2942 |
const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); |
|
2943 |
return str; |
|
2944 |
} |
|
2945 |
} |
|
2946 |
} |
|
2947 |
return NULL; |
|
2948 |
} |
|
2949 |
||
2950 |
const char* JavaThread::get_parent_name() const { |
|
2951 |
debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) |
|
2952 |
oop thread_obj = threadObj(); |
|
2953 |
if (thread_obj != NULL) { |
|
2954 |
oop thread_group = java_lang_Thread::threadGroup(thread_obj); |
|
2955 |
if (thread_group != NULL) { |
|
2956 |
oop parent = java_lang_ThreadGroup::parent(thread_group); |
|
2957 |
if (parent != NULL) { |
|
2958 |
typeArrayOop name = java_lang_ThreadGroup::name(parent); |
|
2959 |
// ThreadGroup.name can be null |
|
2960 |
if (name != NULL) { |
|
2961 |
const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); |
|
2962 |
return str; |
|
2963 |
} |
|
2964 |
} |
|
2965 |
} |
|
2966 |
} |
|
2967 |
return NULL; |
|
2968 |
} |
|
2969 |
||
2970 |
ThreadPriority JavaThread::java_priority() const { |
|
2971 |
oop thr_oop = threadObj(); |
|
2972 |
if (thr_oop == NULL) return NormPriority; // Bootstrapping |
|
2973 |
ThreadPriority priority = java_lang_Thread::priority(thr_oop); |
|
2974 |
assert(MinPriority <= priority && priority <= MaxPriority, "sanity check"); |
|
2975 |
return priority; |
|
2976 |
} |
|
2977 |
||
2978 |
void JavaThread::prepare(jobject jni_thread, ThreadPriority prio) { |
|
2979 |
||
2980 |
assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); |
|
2981 |
// Link Java Thread object <-> C++ Thread |
|
2982 |
||
2983 |
// Get the C++ thread object (an oop) from the JNI handle (a jthread) |
|
2984 |
// and put it into a new Handle. The Handle "thread_oop" can then |
|
2985 |
// be used to pass the C++ thread object to other methods. |
|
2986 |
||
2987 |
// Set the Java level thread object (jthread) field of the |
|
2988 |
// new thread (a JavaThread *) to C++ thread object using the |
|
2989 |
// "thread_oop" handle. |
|
2990 |
||
2991 |
// Set the thread field (a JavaThread *) of the |
|
2992 |
// oop representing the java_lang_Thread to the new thread (a JavaThread *). |
|
2993 |
||
2994 |
Handle thread_oop(Thread::current(), |
|
2995 |
JNIHandles::resolve_non_null(jni_thread)); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
2996 |
assert(InstanceKlass::cast(thread_oop->klass())->is_linked(), |
1 | 2997 |
"must be initialized"); |
2998 |
set_threadObj(thread_oop()); |
|
2999 |
java_lang_Thread::set_thread(thread_oop(), this); |
|
3000 |
||
3001 |
if (prio == NoPriority) { |
|
3002 |
prio = java_lang_Thread::priority(thread_oop()); |
|
3003 |
assert(prio != NoPriority, "A valid priority should be present"); |
|
3004 |
} |
|
3005 |
||
3006 |
// Push the Java priority down to the native thread; needs Threads_lock |
|
3007 |
Thread::set_priority(this, prio); |
|
3008 |
||
3009 |
// Add the new thread to the Threads list and set it in motion. |
|
3010 |
// We must have threads lock in order to call Threads::add. |
|
3011 |
// It is crucial that we do not block before the thread is |
|
3012 |
// added to the Threads list for if a GC happens, then the java_thread oop |
|
3013 |
// will not be visited by GC. |
|
3014 |
Threads::add(this); |
|
3015 |
} |
|
3016 |
||
3017 |
oop JavaThread::current_park_blocker() { |
|
3018 |
// Support for JSR-166 locks |
|
3019 |
oop thread_oop = threadObj(); |
|
950 | 3020 |
if (thread_oop != NULL && |
3021 |
JDK_Version::current().supports_thread_park_blocker()) { |
|
1 | 3022 |
return java_lang_Thread::park_blocker(thread_oop); |
3023 |
} |
|
3024 |
return NULL; |
|
3025 |
} |
|
3026 |
||
3027 |
||
3028 |
void JavaThread::print_stack_on(outputStream* st) { |
|
3029 |
if (!has_last_Java_frame()) return; |
|
3030 |
ResourceMark rm; |
|
3031 |
HandleMark hm; |
|
3032 |
||
3033 |
RegisterMap reg_map(this); |
|
3034 |
vframe* start_vf = last_java_vframe(®_map); |
|
3035 |
int count = 0; |
|
3036 |
for (vframe* f = start_vf; f; f = f->sender() ) { |
|
3037 |
if (f->is_java_frame()) { |
|
3038 |
javaVFrame* jvf = javaVFrame::cast(f); |
|
3039 |
java_lang_Throwable::print_stack_element(st, jvf->method(), jvf->bci()); |
|
3040 |
||
3041 |
// Print out lock information |
|
3042 |
if (JavaMonitorsInStackTrace) { |
|
3043 |
jvf->print_lock_info_on(st, count); |
|
3044 |
} |
|
3045 |
} else { |
|
3046 |
// Ignore non-Java frames |
|
3047 |
} |
|
3048 |
||
3049 |
// Bail-out case for too deep stacks |
|
3050 |
count++; |
|
3051 |
if (MaxJavaStackTraceDepth == count) return; |
|
3052 |
} |
|
3053 |
} |
|
3054 |
||
3055 |
||
3056 |
// JVMTI PopFrame support |
|
3057 |
void JavaThread::popframe_preserve_args(ByteSize size_in_bytes, void* start) { |
|
3058 |
assert(_popframe_preserved_args == NULL, "should not wipe out old PopFrame preserved arguments"); |
|
3059 |
if (in_bytes(size_in_bytes) != 0) { |
|
13195 | 3060 |
_popframe_preserved_args = NEW_C_HEAP_ARRAY(char, in_bytes(size_in_bytes), mtThread); |
1 | 3061 |
_popframe_preserved_args_size = in_bytes(size_in_bytes); |
5883
8dc4bdc132d5
6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents:
5707
diff
changeset
|
3062 |
Copy::conjoint_jbytes(start, _popframe_preserved_args, _popframe_preserved_args_size); |
1 | 3063 |
} |
3064 |
} |
|
3065 |
||
3066 |
void* JavaThread::popframe_preserved_args() { |
|
3067 |
return _popframe_preserved_args; |
|
3068 |
} |
|
3069 |
||
3070 |
ByteSize JavaThread::popframe_preserved_args_size() { |
|
3071 |
return in_ByteSize(_popframe_preserved_args_size); |
|
3072 |
} |
|
3073 |
||
3074 |
WordSize JavaThread::popframe_preserved_args_size_in_words() { |
|
3075 |
int sz = in_bytes(popframe_preserved_args_size()); |
|
3076 |
assert(sz % wordSize == 0, "argument size must be multiple of wordSize"); |
|
3077 |
return in_WordSize(sz / wordSize); |
|
3078 |
} |
|
3079 |
||
3080 |
void JavaThread::popframe_free_preserved_args() { |
|
3081 |
assert(_popframe_preserved_args != NULL, "should not free PopFrame preserved arguments twice"); |
|
13195 | 3082 |
FREE_C_HEAP_ARRAY(char, (char*) _popframe_preserved_args, mtThread); |
1 | 3083 |
_popframe_preserved_args = NULL; |
3084 |
_popframe_preserved_args_size = 0; |
|
3085 |
} |
|
3086 |
||
3087 |
#ifndef PRODUCT |
|
3088 |
||
3089 |
void JavaThread::trace_frames() { |
|
3090 |
tty->print_cr("[Describe stack]"); |
|
3091 |
int frame_no = 1; |
|
3092 |
for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { |
|
3093 |
tty->print(" %d. ", frame_no++); |
|
3094 |
fst.current()->print_value_on(tty,this); |
|
3095 |
tty->cr(); |
|
3096 |
} |
|
3097 |
} |
|
3098 |
||
10517
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3099 |
class PrintAndVerifyOopClosure: public OopClosure { |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3100 |
protected: |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3101 |
template <class T> inline void do_oop_work(T* p) { |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3102 |
oop obj = oopDesc::load_decode_heap_oop(p); |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3103 |
if (obj == NULL) return; |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3104 |
tty->print(INTPTR_FORMAT ": ", p); |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3105 |
if (obj->is_oop_or_null()) { |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3106 |
if (obj->is_objArray()) { |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3107 |
tty->print_cr("valid objArray: " INTPTR_FORMAT, (oopDesc*) obj); |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3108 |
} else { |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3109 |
obj->print(); |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3110 |
} |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3111 |
} else { |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3112 |
tty->print_cr("invalid oop: " INTPTR_FORMAT, (oopDesc*) obj); |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3113 |
} |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3114 |
tty->cr(); |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3115 |
} |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3116 |
public: |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3117 |
virtual void do_oop(oop* p) { do_oop_work(p); } |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3118 |
virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3119 |
}; |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3120 |
|
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3121 |
|
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3122 |
static void oops_print(frame* f, const RegisterMap *map) { |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3123 |
PrintAndVerifyOopClosure print; |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3124 |
f->print_value(); |
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
3125 |
f->oops_do(&print, NULL, NULL, (RegisterMap*)map); |
10517
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3126 |
} |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3127 |
|
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3128 |
// Print our all the locations that contain oops and whether they are |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3129 |
// valid or not. This useful when trying to find the oldest frame |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3130 |
// where an oop has gone bad since the frame walk is from youngest to |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3131 |
// oldest. |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3132 |
void JavaThread::trace_oops() { |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3133 |
tty->print_cr("[Trace oops]"); |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3134 |
frames_do(oops_print); |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3135 |
} |
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
10508
diff
changeset
|
3136 |
|
1 | 3137 |
|
9946
b3d5b50e2289
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
9942
diff
changeset
|
3138 |
#ifdef ASSERT |
9437
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3139 |
// Print or validate the layout of stack frames |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3140 |
void JavaThread::print_frame_layout(int depth, bool validate_only) { |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3141 |
ResourceMark rm; |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3142 |
PRESERVE_EXCEPTION_MARK; |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3143 |
FrameValues values; |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3144 |
int frame_no = 0; |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3145 |
for(StackFrameStream fst(this, false); !fst.is_done(); fst.next()) { |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3146 |
fst.current()->describe(values, ++frame_no); |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3147 |
if (depth == frame_no) break; |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3148 |
} |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3149 |
if (validate_only) { |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3150 |
values.validate(); |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3151 |
} else { |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3152 |
tty->print_cr("[Describe stack layout]"); |
10966
0c9ed2dfc6a2
7090904: JSR 292: JRuby junit test crashes in PSScavengeRootsClosure::do_oop
twisti
parents:
10740
diff
changeset
|
3153 |
values.print(this); |
9437
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3154 |
} |
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3155 |
} |
9946
b3d5b50e2289
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
9942
diff
changeset
|
3156 |
#endif |
9437
9981851b4b8c
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
8883
diff
changeset
|
3157 |
|
1 | 3158 |
void JavaThread::trace_stack_from(vframe* start_vf) { |
3159 |
ResourceMark rm; |
|
3160 |
int vframe_no = 1; |
|
3161 |
for (vframe* f = start_vf; f; f = f->sender() ) { |
|
3162 |
if (f->is_java_frame()) { |
|
3163 |
javaVFrame::cast(f)->print_activation(vframe_no++); |
|
3164 |
} else { |
|
3165 |
f->print(); |
|
3166 |
} |
|
3167 |
if (vframe_no > StackPrintLimit) { |
|
3168 |
tty->print_cr("...<more frames>..."); |
|
3169 |
return; |
|
3170 |
} |
|
3171 |
} |
|
3172 |
} |
|
3173 |
||
3174 |
||
3175 |
void JavaThread::trace_stack() { |
|
3176 |
if (!has_last_Java_frame()) return; |
|
3177 |
ResourceMark rm; |
|
3178 |
HandleMark hm; |
|
3179 |
RegisterMap reg_map(this); |
|
3180 |
trace_stack_from(last_java_vframe(®_map)); |
|
3181 |
} |
|
3182 |
||
3183 |
||
3184 |
#endif // PRODUCT |
|
3185 |
||
3186 |
||
3187 |
javaVFrame* JavaThread::last_java_vframe(RegisterMap *reg_map) { |
|
3188 |
assert(reg_map != NULL, "a map must be given"); |
|
3189 |
frame f = last_frame(); |
|
3190 |
for (vframe* vf = vframe::new_vframe(&f, reg_map, this); vf; vf = vf->sender() ) { |
|
3191 |
if (vf->is_java_frame()) return javaVFrame::cast(vf); |
|
3192 |
} |
|
3193 |
return NULL; |
|
3194 |
} |
|
3195 |
||
3196 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3197 |
Klass* JavaThread::security_get_caller_class(int depth) { |
1 | 3198 |
vframeStream vfst(this); |
3199 |
vfst.security_get_caller_frame(depth); |
|
3200 |
if (!vfst.at_end()) { |
|
3201 |
return vfst.method()->method_holder(); |
|
3202 |
} |
|
3203 |
return NULL; |
|
3204 |
} |
|
3205 |
||
3206 |
static void compiler_thread_entry(JavaThread* thread, TRAPS) { |
|
3207 |
assert(thread->is_Compiler_thread(), "must be compiler thread"); |
|
3208 |
CompileBroker::compiler_thread_loop(); |
|
3209 |
} |
|
3210 |
||
3211 |
// Create a CompilerThread |
|
3212 |
CompilerThread::CompilerThread(CompileQueue* queue, CompilerCounters* counters) |
|
3213 |
: JavaThread(&compiler_thread_entry) { |
|
3214 |
_env = NULL; |
|
3215 |
_log = NULL; |
|
3216 |
_task = NULL; |
|
3217 |
_queue = queue; |
|
3218 |
_counters = counters; |
|
5707 | 3219 |
_buffer_blob = NULL; |
9942
2e86734ba620
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
9437
diff
changeset
|
3220 |
_scanned_nmethod = NULL; |
1 | 3221 |
|
3222 |
#ifndef PRODUCT |
|
3223 |
_ideal_graph_printer = NULL; |
|
3224 |
#endif |
|
3225 |
} |
|
3226 |
||
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
3227 |
void CompilerThread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
3228 |
JavaThread::oops_do(f, cld_f, cf); |
9942
2e86734ba620
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
9437
diff
changeset
|
3229 |
if (_scanned_nmethod != NULL && cf != NULL) { |
2e86734ba620
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
9437
diff
changeset
|
3230 |
// Safepoints can occur when the sweeper is scanning an nmethod so |
2e86734ba620
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
9437
diff
changeset
|
3231 |
// process it here to make sure it isn't unloaded in the middle of |
2e86734ba620
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
9437
diff
changeset
|
3232 |
// a scan. |
2e86734ba620
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
9437
diff
changeset
|
3233 |
cf->do_code_blob(_scanned_nmethod); |
2e86734ba620
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
9437
diff
changeset
|
3234 |
} |
2e86734ba620
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
9437
diff
changeset
|
3235 |
} |
1 | 3236 |
|
3237 |
// ======= Threads ======== |
|
3238 |
||
3239 |
// The Threads class links together all active threads, and provides |
|
3240 |
// operations over all threads. It is protected by its own Mutex |
|
3241 |
// lock, which is also used in other contexts to protect thread |
|
3242 |
// operations from having the thread being operated on from exiting |
|
3243 |
// and going away unexpectedly (e.g., safepoint synchronization) |
|
3244 |
||
3245 |
JavaThread* Threads::_thread_list = NULL; |
|
3246 |
int Threads::_number_of_threads = 0; |
|
3247 |
int Threads::_number_of_non_daemon_threads = 0; |
|
3248 |
int Threads::_return_code = 0; |
|
3249 |
size_t JavaThread::_stack_size_at_create = 0; |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3250 |
#ifdef ASSERT |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3251 |
bool Threads::_vm_complete = false; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3252 |
#endif |
1 | 3253 |
|
3254 |
// All JavaThreads |
|
3255 |
#define ALL_JAVA_THREADS(X) for (JavaThread* X = _thread_list; X; X = X->next()) |
|
3256 |
||
3257 |
void os_stream(); |
|
3258 |
||
3259 |
// All JavaThreads + all non-JavaThreads (i.e., every thread in the system) |
|
3260 |
void Threads::threads_do(ThreadClosure* tc) { |
|
3261 |
assert_locked_or_safepoint(Threads_lock); |
|
3262 |
// ALL_JAVA_THREADS iterates through all JavaThreads |
|
3263 |
ALL_JAVA_THREADS(p) { |
|
3264 |
tc->do_thread(p); |
|
3265 |
} |
|
3266 |
// Someday we could have a table or list of all non-JavaThreads. |
|
3267 |
// For now, just manually iterate through them. |
|
3268 |
tc->do_thread(VMThread::vm_thread()); |
|
3269 |
Universe::heap()->gc_threads_do(tc); |
|
1127
7245ad3ee7ea
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
994
diff
changeset
|
3270 |
WatcherThread *wt = WatcherThread::watcher_thread(); |
7245ad3ee7ea
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
994
diff
changeset
|
3271 |
// Strictly speaking, the following NULL check isn't sufficient to make sure |
7245ad3ee7ea
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
994
diff
changeset
|
3272 |
// the data for WatcherThread is still valid upon being examined. However, |
7245ad3ee7ea
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
994
diff
changeset
|
3273 |
// considering that WatchThread terminates when the VM is on the way to |
7245ad3ee7ea
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
994
diff
changeset
|
3274 |
// exit at safepoint, the chance of the above is extremely small. The right |
7245ad3ee7ea
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
994
diff
changeset
|
3275 |
// way to prevent termination of WatcherThread would be to acquire |
7245ad3ee7ea
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
994
diff
changeset
|
3276 |
// Terminator_lock, but we can't do that without violating the lock rank |
7245ad3ee7ea
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
994
diff
changeset
|
3277 |
// checking in some cases. |
7245ad3ee7ea
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
994
diff
changeset
|
3278 |
if (wt != NULL) |
7245ad3ee7ea
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
994
diff
changeset
|
3279 |
tc->do_thread(wt); |
7245ad3ee7ea
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
994
diff
changeset
|
3280 |
|
1 | 3281 |
// If CompilerThreads ever become non-JavaThreads, add them here |
3282 |
} |
|
3283 |
||
3284 |
jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) { |
|
3285 |
||
950 | 3286 |
extern void JDK_Version_init(); |
3287 |
||
1 | 3288 |
// Check version |
3289 |
if (!is_supported_jni_version(args->version)) return JNI_EVERSION; |
|
3290 |
||
3291 |
// Initialize the output stream module |
|
3292 |
ostream_init(); |
|
3293 |
||
3294 |
// Process java launcher properties. |
|
3295 |
Arguments::process_sun_java_launcher_properties(args); |
|
3296 |
||
3297 |
// Initialize the os module before using TLS |
|
3298 |
os::init(); |
|
3299 |
||
3300 |
// Initialize system properties. |
|
3301 |
Arguments::init_system_properties(); |
|
3302 |
||
950 | 3303 |
// So that JDK version can be used as a discrimintor when parsing arguments |
3304 |
JDK_Version_init(); |
|
3305 |
||
6961
a32b2fc66321
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
6273
diff
changeset
|
3306 |
// Update/Initialize System properties after JDK version number is known |
a32b2fc66321
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
6273
diff
changeset
|
3307 |
Arguments::init_version_specific_system_properties(); |
a32b2fc66321
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
6273
diff
changeset
|
3308 |
|
1 | 3309 |
// Parse arguments |
3310 |
jint parse_result = Arguments::parse(args); |
|
3311 |
if (parse_result != JNI_OK) return parse_result; |
|
3312 |
||
3313 |
if (PauseAtStartup) { |
|
3314 |
os::pause(); |
|
3315 |
} |
|
3316 |
||
10739 | 3317 |
#ifndef USDT2 |
1 | 3318 |
HS_DTRACE_PROBE(hotspot, vm__init__begin); |
10739 | 3319 |
#else /* USDT2 */ |
3320 |
HOTSPOT_VM_INIT_BEGIN(); |
|
3321 |
#endif /* USDT2 */ |
|
1 | 3322 |
|
3323 |
// Record VM creation timing statistics |
|
3324 |
TraceVmCreationTime create_vm_timer; |
|
3325 |
create_vm_timer.start(); |
|
3326 |
||
3327 |
// Timing (must come after argument parsing) |
|
3328 |
TraceTime timer("Create VM", TraceStartupTime); |
|
3329 |
||
3330 |
// Initialize the os module after parsing the args |
|
3331 |
jint os_init_2_result = os::init_2(); |
|
3332 |
if (os_init_2_result != JNI_OK) return os_init_2_result; |
|
3333 |
||
14580
3e2316663327
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
14490
diff
changeset
|
3334 |
jint adjust_after_os_result = Arguments::adjust_after_os(); |
3e2316663327
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
14490
diff
changeset
|
3335 |
if (adjust_after_os_result != JNI_OK) return adjust_after_os_result; |
3e2316663327
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
14490
diff
changeset
|
3336 |
|
13195 | 3337 |
// intialize TLS |
3338 |
ThreadLocalStorage::init(); |
|
3339 |
||
3340 |
// Bootstrap native memory tracking, so it can start recording memory |
|
3341 |
// activities before worker thread is started. This is the first phase |
|
3342 |
// of bootstrapping, VM is currently running in single-thread mode. |
|
3343 |
MemTracker::bootstrap_single_thread(); |
|
3344 |
||
1 | 3345 |
// Initialize output stream logging |
3346 |
ostream_init_log(); |
|
3347 |
||
3348 |
// Convert -Xrun to -agentlib: if there is no JVM_OnLoad |
|
3349 |
// Must be before create_vm_init_agents() |
|
3350 |
if (Arguments::init_libraries_at_startup()) { |
|
3351 |
convert_vm_init_libraries_to_agents(); |
|
3352 |
} |
|
3353 |
||
3354 |
// Launch -agentlib/-agentpath and converted -Xrun agents |
|
3355 |
if (Arguments::init_agents_at_startup()) { |
|
3356 |
create_vm_init_agents(); |
|
3357 |
} |
|
3358 |
||
3359 |
// Initialize Threads state |
|
3360 |
_thread_list = NULL; |
|
3361 |
_number_of_threads = 0; |
|
3362 |
_number_of_non_daemon_threads = 0; |
|
3363 |
||
3364 |
// Initialize global data structures and create system classes in heap |
|
3365 |
vm_init_globals(); |
|
3366 |
||
3367 |
// Attach the main thread to this os thread |
|
3368 |
JavaThread* main_thread = new JavaThread(); |
|
3369 |
main_thread->set_thread_state(_thread_in_vm); |
|
3370 |
// must do this before set_active_handles and initialize_thread_local_storage |
|
3371 |
// Note: on solaris initialize_thread_local_storage() will (indirectly) |
|
3372 |
// change the stack size recorded here to one based on the java thread |
|
3373 |
// stacksize. This adjusted size is what is used to figure the placement |
|
3374 |
// of the guard pages. |
|
3375 |
main_thread->record_stack_base_and_size(); |
|
3376 |
main_thread->initialize_thread_local_storage(); |
|
3377 |
||
3378 |
main_thread->set_active_handles(JNIHandleBlock::allocate_block()); |
|
3379 |
||
3380 |
if (!main_thread->set_as_starting_thread()) { |
|
3381 |
vm_shutdown_during_initialization( |
|
3382 |
"Failed necessary internal allocation. Out of swap space"); |
|
3383 |
delete main_thread; |
|
3384 |
*canTryAgain = false; // don't let caller call JNI_CreateJavaVM again |
|
3385 |
return JNI_ENOMEM; |
|
3386 |
} |
|
3387 |
||
3388 |
// Enable guard page *after* os::create_main_thread(), otherwise it would |
|
3389 |
// crash Linux VM, see notes in os_linux.cpp. |
|
3390 |
main_thread->create_stack_guard_pages(); |
|
3391 |
||
6975 | 3392 |
// Initialize Java-Level synchronization subsystem |
3393 |
ObjectMonitor::Initialize() ; |
|
1 | 3394 |
|
13195 | 3395 |
// Second phase of bootstrapping, VM is about entering multi-thread mode |
3396 |
MemTracker::bootstrap_multi_thread(); |
|
3397 |
||
1 | 3398 |
// Initialize global modules |
3399 |
jint status = init_globals(); |
|
3400 |
if (status != JNI_OK) { |
|
3401 |
delete main_thread; |
|
3402 |
*canTryAgain = false; // don't let caller call JNI_CreateJavaVM again |
|
3403 |
return status; |
|
3404 |
} |
|
3405 |
||
6176
4d9030fe341f
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
5888
diff
changeset
|
3406 |
// Should be done after the heap is fully created |
4d9030fe341f
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
5888
diff
changeset
|
3407 |
main_thread->cache_global_variables(); |
4d9030fe341f
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
5888
diff
changeset
|
3408 |
|
1 | 3409 |
HandleMark hm; |
3410 |
||
3411 |
{ MutexLocker mu(Threads_lock); |
|
3412 |
Threads::add(main_thread); |
|
3413 |
} |
|
3414 |
||
3415 |
// Any JVMTI raw monitors entered in onload will transition into |
|
3416 |
// real raw monitor. VM is setup enough here for raw monitor enter. |
|
3417 |
JvmtiExport::transition_pending_onload_raw_monitors(); |
|
3418 |
||
3419 |
if (VerifyBeforeGC && |
|
3420 |
Universe::heap()->total_collections() >= VerifyGCStartAt) { |
|
3421 |
Universe::heap()->prepare_for_verify(); |
|
3422 |
Universe::verify(); // make sure we're starting with a clean slate |
|
3423 |
} |
|
3424 |
||
13195 | 3425 |
// Fully start NMT |
3426 |
MemTracker::start(); |
|
3427 |
||
1 | 3428 |
// Create the VMThread |
3429 |
{ TraceTime timer("Start VMThread", TraceStartupTime); |
|
3430 |
VMThread::create(); |
|
3431 |
Thread* vmthread = VMThread::vm_thread(); |
|
3432 |
||
3433 |
if (!os::create_thread(vmthread, os::vm_thread)) |
|
3434 |
vm_exit_during_initialization("Cannot create VM thread. Out of system resources."); |
|
3435 |
||
3436 |
// Wait for the VM thread to become ready, and VMThread::run to initialize |
|
3437 |
// Monitors can have spurious returns, must always check another state flag |
|
3438 |
{ |
|
3439 |
MutexLocker ml(Notify_lock); |
|
3440 |
os::start_thread(vmthread); |
|
3441 |
while (vmthread->active_handles() == NULL) { |
|
3442 |
Notify_lock->wait(); |
|
3443 |
} |
|
3444 |
} |
|
3445 |
} |
|
3446 |
||
3447 |
assert (Universe::is_fully_initialized(), "not initialized"); |
|
3448 |
EXCEPTION_MARK; |
|
3449 |
||
3450 |
// At this point, the Universe is initialized, but we have not executed |
|
3451 |
// any byte code. Now is a good time (the only time) to dump out the |
|
3452 |
// internal state of the JVM for sharing. |
|
3453 |
if (DumpSharedSpaces) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3454 |
MetaspaceShared::preload_and_dump(CHECK_0); |
1 | 3455 |
ShouldNotReachHere(); |
3456 |
} |
|
3457 |
||
3458 |
// Always call even when there are not JVMTI environments yet, since environments |
|
3459 |
// may be attached late and JVMTI must track phases of VM execution |
|
3460 |
JvmtiExport::enter_start_phase(); |
|
3461 |
||
3462 |
// Notify JVMTI agents that VM has started (JNI is up) - nop if no agents. |
|
3463 |
JvmtiExport::post_vm_start(); |
|
3464 |
||
3465 |
{ |
|
3466 |
TraceTime timer("Initialize java.lang classes", TraceStartupTime); |
|
3467 |
||
3468 |
if (EagerXrunInit && Arguments::init_libraries_at_startup()) { |
|
3469 |
create_vm_init_libraries(); |
|
3470 |
} |
|
3471 |
||
3472 |
if (InitializeJavaLangString) { |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3473 |
initialize_class(vmSymbols::java_lang_String(), CHECK_0); |
1 | 3474 |
} else { |
3475 |
warning("java.lang.String not initialized"); |
|
3476 |
} |
|
3477 |
||
191
314312979e7a
6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents:
1
diff
changeset
|
3478 |
if (AggressiveOpts) { |
618
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3479 |
{ |
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3480 |
// Forcibly initialize java/util/HashMap and mutate the private |
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3481 |
// static final "frontCacheEnabled" field before we start creating instances |
191
314312979e7a
6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents:
1
diff
changeset
|
3482 |
#ifdef ASSERT |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3483 |
Klass* tmp_k = SystemDictionary::find(vmSymbols::java_util_HashMap(), Handle(), Handle(), CHECK_0); |
618
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3484 |
assert(tmp_k == NULL, "java/util/HashMap should not be loaded yet"); |
191
314312979e7a
6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents:
1
diff
changeset
|
3485 |
#endif |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3486 |
Klass* k_o = SystemDictionary::resolve_or_null(vmSymbols::java_util_HashMap(), Handle(), Handle(), CHECK_0); |
618
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3487 |
KlassHandle k = KlassHandle(THREAD, k_o); |
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3488 |
guarantee(k.not_null(), "Must find java/util/HashMap"); |
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3489 |
instanceKlassHandle ik = instanceKlassHandle(THREAD, k()); |
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3490 |
ik->initialize(CHECK_0); |
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3491 |
fieldDescriptor fd; |
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3492 |
// Possible we might not find this field; if so, don't break |
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3493 |
if (ik->find_local_field(vmSymbols::frontCacheEnabled_name(), vmSymbols::bool_signature(), &fd)) { |
8725
8c1e3dd5fe1b
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
8476
diff
changeset
|
3494 |
k()->java_mirror()->bool_field_put(fd.offset(), true); |
618
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3495 |
} |
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3496 |
} |
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3497 |
|
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3498 |
if (UseStringCache) { |
2336
427ce3320578
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
1560
diff
changeset
|
3499 |
// Forcibly initialize java/lang/StringValue and mutate the private |
618
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3500 |
// static final "stringCacheEnabled" field before we start creating instances |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3501 |
Klass* k_o = SystemDictionary::resolve_or_null(vmSymbols::java_lang_StringValue(), Handle(), Handle(), CHECK_0); |
2336
427ce3320578
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
1560
diff
changeset
|
3502 |
// Possible that StringValue isn't present: if so, silently don't break |
427ce3320578
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
1560
diff
changeset
|
3503 |
if (k_o != NULL) { |
427ce3320578
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
1560
diff
changeset
|
3504 |
KlassHandle k = KlassHandle(THREAD, k_o); |
427ce3320578
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
1560
diff
changeset
|
3505 |
instanceKlassHandle ik = instanceKlassHandle(THREAD, k()); |
427ce3320578
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
1560
diff
changeset
|
3506 |
ik->initialize(CHECK_0); |
427ce3320578
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
1560
diff
changeset
|
3507 |
fieldDescriptor fd; |
427ce3320578
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
1560
diff
changeset
|
3508 |
// Possible we might not find this field: if so, silently don't break |
427ce3320578
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
1560
diff
changeset
|
3509 |
if (ik->find_local_field(vmSymbols::stringCacheEnabled_name(), vmSymbols::bool_signature(), &fd)) { |
8725
8c1e3dd5fe1b
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
8476
diff
changeset
|
3510 |
k()->java_mirror()->bool_field_put(fd.offset(), true); |
2336
427ce3320578
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
1560
diff
changeset
|
3511 |
} |
618
9641c2c8f977
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
235
diff
changeset
|
3512 |
} |
191
314312979e7a
6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents:
1
diff
changeset
|
3513 |
} |
314312979e7a
6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents:
1
diff
changeset
|
3514 |
} |
314312979e7a
6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents:
1
diff
changeset
|
3515 |
|
1 | 3516 |
// Initialize java_lang.System (needed before creating the thread) |
3517 |
if (InitializeJavaLangSystem) { |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3518 |
initialize_class(vmSymbols::java_lang_System(), CHECK_0); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3519 |
initialize_class(vmSymbols::java_lang_ThreadGroup(), CHECK_0); |
1 | 3520 |
Handle thread_group = create_initial_thread_group(CHECK_0); |
3521 |
Universe::set_main_thread_group(thread_group()); |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3522 |
initialize_class(vmSymbols::java_lang_Thread(), CHECK_0); |
1 | 3523 |
oop thread_object = create_initial_thread(thread_group, main_thread, CHECK_0); |
3524 |
main_thread->set_threadObj(thread_object); |
|
3525 |
// Set thread status to running since main thread has |
|
3526 |
// been started and running. |
|
3527 |
java_lang_Thread::set_thread_status(thread_object, |
|
3528 |
java_lang_Thread::RUNNABLE); |
|
3529 |
||
3530 |
// The VM preresolve methods to these classes. Make sure that get initialized |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3531 |
initialize_class(vmSymbols::java_lang_reflect_Method(), CHECK_0); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3532 |
initialize_class(vmSymbols::java_lang_ref_Finalizer(), CHECK_0); |
1 | 3533 |
// The VM creates & returns objects of this class. Make sure it's initialized. |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3534 |
initialize_class(vmSymbols::java_lang_Class(), CHECK_0); |
1 | 3535 |
call_initializeSystemClass(CHECK_0); |
13106 | 3536 |
|
3537 |
// get the Java runtime name after java.lang.System is initialized |
|
3538 |
JDK_Version::set_runtime_name(get_java_runtime_name(THREAD)); |
|
14289
aec758622b4b
8002078: hs_err_pid file should report full JDK version string
sla
parents:
14120
diff
changeset
|
3539 |
JDK_Version::set_runtime_version(get_java_runtime_version(THREAD)); |
1 | 3540 |
} else { |
3541 |
warning("java.lang.System not initialized"); |
|
3542 |
} |
|
3543 |
||
3544 |
// an instance of OutOfMemory exception has been allocated earlier |
|
3545 |
if (InitializeJavaLangExceptionsErrors) { |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3546 |
initialize_class(vmSymbols::java_lang_OutOfMemoryError(), CHECK_0); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3547 |
initialize_class(vmSymbols::java_lang_NullPointerException(), CHECK_0); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3548 |
initialize_class(vmSymbols::java_lang_ClassCastException(), CHECK_0); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3549 |
initialize_class(vmSymbols::java_lang_ArrayStoreException(), CHECK_0); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3550 |
initialize_class(vmSymbols::java_lang_ArithmeticException(), CHECK_0); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3551 |
initialize_class(vmSymbols::java_lang_StackOverflowError(), CHECK_0); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3552 |
initialize_class(vmSymbols::java_lang_IllegalMonitorStateException(), CHECK_0); |
11776
519643dbbefb
7145243: Need additional specializations for argument parsing framework
fparain
parents:
11637
diff
changeset
|
3553 |
initialize_class(vmSymbols::java_lang_IllegalArgumentException(), CHECK_0); |
1 | 3554 |
} else { |
3555 |
warning("java.lang.OutOfMemoryError has not been initialized"); |
|
3556 |
warning("java.lang.NullPointerException has not been initialized"); |
|
3557 |
warning("java.lang.ClassCastException has not been initialized"); |
|
3558 |
warning("java.lang.ArrayStoreException has not been initialized"); |
|
3559 |
warning("java.lang.ArithmeticException has not been initialized"); |
|
3560 |
warning("java.lang.StackOverflowError has not been initialized"); |
|
11776
519643dbbefb
7145243: Need additional specializations for argument parsing framework
fparain
parents:
11637
diff
changeset
|
3561 |
warning("java.lang.IllegalArgumentException has not been initialized"); |
1 | 3562 |
} |
8883
5569135acca3
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
8725
diff
changeset
|
3563 |
} |
1 | 3564 |
|
3565 |
// See : bugid 4211085. |
|
3566 |
// Background : the static initializer of java.lang.Compiler tries to read |
|
3567 |
// property"java.compiler" and read & write property "java.vm.info". |
|
3568 |
// When a security manager is installed through the command line |
|
3569 |
// option "-Djava.security.manager", the above properties are not |
|
3570 |
// readable and the static initializer for java.lang.Compiler fails |
|
3571 |
// resulting in a NoClassDefFoundError. This can happen in any |
|
3572 |
// user code which calls methods in java.lang.Compiler. |
|
3573 |
// Hack : the hack is to pre-load and initialize this class, so that only |
|
3574 |
// system domains are on the stack when the properties are read. |
|
3575 |
// Currently even the AWT code has calls to methods in java.lang.Compiler. |
|
3576 |
// On the classic VM, java.lang.Compiler is loaded very early to load the JIT. |
|
3577 |
// Future Fix : the best fix is to grant everyone permissions to read "java.compiler" and |
|
3578 |
// read and write"java.vm.info" in the default policy file. See bugid 4211383 |
|
3579 |
// Once that is done, we should remove this hack. |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3580 |
initialize_class(vmSymbols::java_lang_Compiler(), CHECK_0); |
1 | 3581 |
|
3582 |
// More hackery - the static initializer of java.lang.Compiler adds the string "nojit" to |
|
3583 |
// the java.vm.info property if no jit gets loaded through java.lang.Compiler (the hotspot |
|
3584 |
// compiler does not get loaded through java.lang.Compiler). "java -version" with the |
|
3585 |
// hotspot vm says "nojit" all the time which is confusing. So, we reset it here. |
|
3586 |
// This should also be taken out as soon as 4211383 gets fixed. |
|
3587 |
reset_vm_info_property(CHECK_0); |
|
3588 |
||
3589 |
quicken_jni_functions(); |
|
3590 |
||
11776
519643dbbefb
7145243: Need additional specializations for argument parsing framework
fparain
parents:
11637
diff
changeset
|
3591 |
// Must be run after init_ft which initializes ft_enabled |
519643dbbefb
7145243: Need additional specializations for argument parsing framework
fparain
parents:
11637
diff
changeset
|
3592 |
if (TRACE_INITIALIZE() != JNI_OK) { |
519643dbbefb
7145243: Need additional specializations for argument parsing framework
fparain
parents:
11637
diff
changeset
|
3593 |
vm_exit_during_initialization("Failed to initialize tracing backend"); |
519643dbbefb
7145243: Need additional specializations for argument parsing framework
fparain
parents:
11637
diff
changeset
|
3594 |
} |
519643dbbefb
7145243: Need additional specializations for argument parsing framework
fparain
parents:
11637
diff
changeset
|
3595 |
|
1 | 3596 |
// Set flag that basic initialization has completed. Used by exceptions and various |
3597 |
// debug stuff, that does not work until all basic classes have been initialized. |
|
3598 |
set_init_completed(); |
|
3599 |
||
10739 | 3600 |
#ifndef USDT2 |
1 | 3601 |
HS_DTRACE_PROBE(hotspot, vm__init__end); |
10739 | 3602 |
#else /* USDT2 */ |
3603 |
HOTSPOT_VM_INIT_END(); |
|
3604 |
#endif /* USDT2 */ |
|
1 | 3605 |
|
3606 |
// record VM initialization completion time |
|
13975
2f7431485cfa
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
13860
diff
changeset
|
3607 |
#if INCLUDE_MANAGEMENT |
1 | 3608 |
Management::record_vm_init_completed(); |
13975
2f7431485cfa
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
13860
diff
changeset
|
3609 |
#endif // INCLUDE_MANAGEMENT |
1 | 3610 |
|
3611 |
// Compute system loader. Note that this has to occur after set_init_completed, since |
|
3612 |
// valid exceptions may be thrown in the process. |
|
3613 |
// Note that we do not use CHECK_0 here since we are inside an EXCEPTION_MARK and |
|
3614 |
// set_init_completed has just been called, causing exceptions not to be shortcut |
|
3615 |
// anymore. We call vm_exit_during_initialization directly instead. |
|
3616 |
SystemDictionary::compute_java_system_loader(THREAD); |
|
3617 |
if (HAS_PENDING_EXCEPTION) { |
|
3618 |
vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); |
|
3619 |
} |
|
3620 |
||
3621 |
#ifndef SERIALGC |
|
3622 |
// Support for ConcurrentMarkSweep. This should be cleaned up |
|
1374
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
3623 |
// and better encapsulated. The ugly nested if test would go away |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
3624 |
// once things are properly refactored. XXX YSR |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
3625 |
if (UseConcMarkSweepGC || UseG1GC) { |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
3626 |
if (UseConcMarkSweepGC) { |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
3627 |
ConcurrentMarkSweepThread::makeSurrogateLockerThread(THREAD); |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
3628 |
} else { |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
3629 |
ConcurrentMarkThread::makeSurrogateLockerThread(THREAD); |
4c24294029a9
6711316: Open source the Garbage-First garbage collector
ysr
parents:
235
diff
changeset
|
3630 |
} |
1 | 3631 |
if (HAS_PENDING_EXCEPTION) { |
3632 |
vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); |
|
3633 |
} |
|
3634 |
} |
|
3635 |
#endif // SERIALGC |
|
3636 |
||
3637 |
// Always call even when there are not JVMTI environments yet, since environments |
|
3638 |
// may be attached late and JVMTI must track phases of VM execution |
|
3639 |
JvmtiExport::enter_live_phase(); |
|
3640 |
||
3641 |
// Signal Dispatcher needs to be started before VMInit event is posted |
|
3642 |
os::signal_init(); |
|
3643 |
||
3644 |
// Start Attach Listener if +StartAttachListener or it can't be started lazily |
|
3645 |
if (!DisableAttachMechanism) { |
|
3646 |
if (StartAttachListener || AttachListener::init_at_startup()) { |
|
3647 |
AttachListener::init(); |
|
3648 |
} |
|
3649 |
} |
|
3650 |
||
3651 |
// Launch -Xrun agents |
|
3652 |
// Must be done in the JVMTI live phase so that for backward compatibility the JDWP |
|
3653 |
// back-end can launch with -Xdebug -Xrunjdwp. |
|
3654 |
if (!EagerXrunInit && Arguments::init_libraries_at_startup()) { |
|
3655 |
create_vm_init_libraries(); |
|
3656 |
} |
|
3657 |
||
12373
09835f62dc29
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
12108
diff
changeset
|
3658 |
// Notify JVMTI agents that VM initialization is complete - nop if no agents. |
09835f62dc29
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
12108
diff
changeset
|
3659 |
JvmtiExport::post_vm_initialized(); |
09835f62dc29
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
12108
diff
changeset
|
3660 |
|
11480
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
3661 |
if (!TRACE_START()) { |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
3662 |
vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
3663 |
} |
1bf714e8adb4
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
11174
diff
changeset
|
3664 |
|
10022
377345fb5fb5
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
9992
diff
changeset
|
3665 |
if (CleanChunkPoolAsync) { |
377345fb5fb5
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
9992
diff
changeset
|
3666 |
Chunk::start_chunk_pool_cleaner_task(); |
377345fb5fb5
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
9992
diff
changeset
|
3667 |
} |
1 | 3668 |
|
3669 |
// initialize compiler(s) |
|
13975
2f7431485cfa
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
13860
diff
changeset
|
3670 |
#if defined(COMPILER1) || defined(COMPILER2) |
1 | 3671 |
CompileBroker::compilation_init(); |
13975
2f7431485cfa
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
13860
diff
changeset
|
3672 |
#endif |
2f7431485cfa
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
13860
diff
changeset
|
3673 |
|
2f7431485cfa
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
13860
diff
changeset
|
3674 |
#if INCLUDE_MANAGEMENT |
1 | 3675 |
Management::initialize(THREAD); |
13975
2f7431485cfa
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
13860
diff
changeset
|
3676 |
#endif // INCLUDE_MANAGEMENT |
2f7431485cfa
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
13860
diff
changeset
|
3677 |
|
1 | 3678 |
if (HAS_PENDING_EXCEPTION) { |
3679 |
// management agent fails to start possibly due to |
|
3680 |
// configuration problem and is responsible for printing |
|
3681 |
// stack trace if appropriate. Simply exit VM. |
|
3682 |
vm_exit(1); |
|
3683 |
} |
|
3684 |
||
3685 |
if (Arguments::has_profile()) FlatProfiler::engage(main_thread, true); |
|
3686 |
if (Arguments::has_alloc_profile()) AllocationProfiler::engage(); |
|
3687 |
if (MemProfiling) MemProfiler::engage(); |
|
3688 |
StatSampler::engage(); |
|
3689 |
if (CheckJNICalls) JniPeriodicChecker::engage(); |
|
3690 |
||
3691 |
BiasedLocking::init(); |
|
3692 |
||
7900
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
3693 |
if (JDK_Version::current().post_vm_init_hook_enabled()) { |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
3694 |
call_postVMInitHook(THREAD); |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
3695 |
// The Java side of PostVMInitHook.run must deal with all |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
3696 |
// exceptions and provide means of diagnosis. |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
3697 |
if (HAS_PENDING_EXCEPTION) { |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
3698 |
CLEAR_PENDING_EXCEPTION; |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
3699 |
} |
4c7fc6332f7e
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
7897
diff
changeset
|
3700 |
} |
1 | 3701 |
|
14390
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
3702 |
{ |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
3703 |
MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
3704 |
// Make sure the watcher thread can be started by WatcherThread::start() |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
3705 |
// or by dynamic enrollment. |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
3706 |
WatcherThread::make_startable(); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
3707 |
// Start up the WatcherThread if there are any periodic tasks |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
3708 |
// NOTE: All PeriodicTasks should be registered by now. If they |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
3709 |
// aren't, late joiners might appear to start slowly (we might |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
3710 |
// take a while to process their first tick). |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
3711 |
if (PeriodicTask::num_tasks() > 0) { |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
3712 |
WatcherThread::start(); |
bd0d881cf1c5
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
14289
diff
changeset
|
3713 |
} |
1 | 3714 |
} |
3715 |
||
6176
4d9030fe341f
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
5888
diff
changeset
|
3716 |
// Give os specific code one last chance to start |
4d9030fe341f
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
5888
diff
changeset
|
3717 |
os::init_3(); |
4d9030fe341f
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
5888
diff
changeset
|
3718 |
|
1 | 3719 |
create_vm_timer.end(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3720 |
#ifdef ASSERT |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3721 |
_vm_complete = true; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3722 |
#endif |
1 | 3723 |
return JNI_OK; |
3724 |
} |
|
3725 |
||
3726 |
// type for the Agent_OnLoad and JVM_OnLoad entry points |
|
3727 |
extern "C" { |
|
3728 |
typedef jint (JNICALL *OnLoadEntry_t)(JavaVM *, char *, void *); |
|
3729 |
} |
|
3730 |
// Find a command line agent library and return its entry point for |
|
3731 |
// -agentlib: -agentpath: -Xrun |
|
3732 |
// num_symbol_entries must be passed-in since only the caller knows the number of symbols in the array. |
|
3733 |
static OnLoadEntry_t lookup_on_load(AgentLibrary* agent, const char *on_load_symbols[], size_t num_symbol_entries) { |
|
3734 |
OnLoadEntry_t on_load_entry = NULL; |
|
3735 |
void *library = agent->os_lib(); // check if we have looked it up before |
|
3736 |
||
3737 |
if (library == NULL) { |
|
3738 |
char buffer[JVM_MAXPATHLEN]; |
|
3739 |
char ebuf[1024]; |
|
3740 |
const char *name = agent->name(); |
|
6189
9dcd5f57dcc3
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
6176
diff
changeset
|
3741 |
const char *msg = "Could not find agent library "; |
1 | 3742 |
|
3743 |
if (agent->is_absolute_path()) { |
|
7405
e6fc8d3926f8
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
7397
diff
changeset
|
3744 |
library = os::dll_load(name, ebuf, sizeof ebuf); |
1 | 3745 |
if (library == NULL) { |
6189
9dcd5f57dcc3
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
6176
diff
changeset
|
3746 |
const char *sub_msg = " in absolute path, with error: "; |
9dcd5f57dcc3
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
6176
diff
changeset
|
3747 |
size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
13195 | 3748 |
char *buf = NEW_C_HEAP_ARRAY(char, len, mtThread); |
6189
9dcd5f57dcc3
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
6176
diff
changeset
|
3749 |
jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
1 | 3750 |
// If we can't find the agent, exit. |
6189
9dcd5f57dcc3
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
6176
diff
changeset
|
3751 |
vm_exit_during_initialization(buf, NULL); |
13195 | 3752 |
FREE_C_HEAP_ARRAY(char, buf, mtThread); |
1 | 3753 |
} |
3754 |
} else { |
|
3755 |
// Try to load the agent from the standard dll directory |
|
14471
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14289
diff
changeset
|
3756 |
if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14289
diff
changeset
|
3757 |
name)) { |
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14289
diff
changeset
|
3758 |
library = os::dll_load(buffer, ebuf, sizeof ebuf); |
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14289
diff
changeset
|
3759 |
} |
1 | 3760 |
#ifdef KERNEL |
3761 |
// Download instrument dll |
|
3762 |
if (library == NULL && strcmp(name, "instrument") == 0) { |
|
3763 |
char *props = Arguments::get_kernel_properties(); |
|
3764 |
char *home = Arguments::get_java_home(); |
|
3765 |
const char *fmt = "%s/bin/java %s -Dkernel.background.download=false" |
|
3766 |
" sun.jkernel.DownloadManager -download client_jvm"; |
|
6189
9dcd5f57dcc3
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
6176
diff
changeset
|
3767 |
size_t length = strlen(props) + strlen(home) + strlen(fmt) + 1; |
13195 | 3768 |
char *cmd = NEW_C_HEAP_ARRAY(char, length, mtThread); |
1 | 3769 |
jio_snprintf(cmd, length, fmt, home, props); |
3770 |
int status = os::fork_and_exec(cmd); |
|
3771 |
FreeHeap(props); |
|
3772 |
if (status == -1) { |
|
3773 |
warning(cmd); |
|
3774 |
vm_exit_during_initialization("fork_and_exec failed: %s", |
|
3775 |
strerror(errno)); |
|
3776 |
} |
|
13195 | 3777 |
FREE_C_HEAP_ARRAY(char, cmd, mtThread); |
1 | 3778 |
// when this comes back the instrument.dll should be where it belongs. |
7405
e6fc8d3926f8
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
7397
diff
changeset
|
3779 |
library = os::dll_load(buffer, ebuf, sizeof ebuf); |
1 | 3780 |
} |
3781 |
#endif // KERNEL |
|
3782 |
if (library == NULL) { // Try the local directory |
|
3783 |
char ns[1] = {0}; |
|
14471
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14289
diff
changeset
|
3784 |
if (os::dll_build_name(buffer, sizeof(buffer), ns, name)) { |
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14289
diff
changeset
|
3785 |
library = os::dll_load(buffer, ebuf, sizeof ebuf); |
f3a6b82e25cf
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
14289
diff
changeset
|
3786 |
} |
1 | 3787 |
if (library == NULL) { |
6189
9dcd5f57dcc3
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
6176
diff
changeset
|
3788 |
const char *sub_msg = " on the library path, with error: "; |
9dcd5f57dcc3
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
6176
diff
changeset
|
3789 |
size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
13195 | 3790 |
char *buf = NEW_C_HEAP_ARRAY(char, len, mtThread); |
6189
9dcd5f57dcc3
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
6176
diff
changeset
|
3791 |
jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
1 | 3792 |
// If we can't find the agent, exit. |
6189
9dcd5f57dcc3
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
6176
diff
changeset
|
3793 |
vm_exit_during_initialization(buf, NULL); |
13195 | 3794 |
FREE_C_HEAP_ARRAY(char, buf, mtThread); |
1 | 3795 |
} |
3796 |
} |
|
3797 |
} |
|
3798 |
agent->set_os_lib(library); |
|
3799 |
} |
|
3800 |
||
3801 |
// Find the OnLoad function. |
|
3802 |
for (size_t symbol_index = 0; symbol_index < num_symbol_entries; symbol_index++) { |
|
7405
e6fc8d3926f8
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
7397
diff
changeset
|
3803 |
on_load_entry = CAST_TO_FN_PTR(OnLoadEntry_t, os::dll_lookup(library, on_load_symbols[symbol_index])); |
1 | 3804 |
if (on_load_entry != NULL) break; |
3805 |
} |
|
3806 |
return on_load_entry; |
|
3807 |
} |
|
3808 |
||
3809 |
// Find the JVM_OnLoad entry point |
|
3810 |
static OnLoadEntry_t lookup_jvm_on_load(AgentLibrary* agent) { |
|
3811 |
const char *on_load_symbols[] = JVM_ONLOAD_SYMBOLS; |
|
3812 |
return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); |
|
3813 |
} |
|
3814 |
||
3815 |
// Find the Agent_OnLoad entry point |
|
3816 |
static OnLoadEntry_t lookup_agent_on_load(AgentLibrary* agent) { |
|
3817 |
const char *on_load_symbols[] = AGENT_ONLOAD_SYMBOLS; |
|
3818 |
return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); |
|
3819 |
} |
|
3820 |
||
3821 |
// For backwards compatibility with -Xrun |
|
3822 |
// Convert libraries with no JVM_OnLoad, but which have Agent_OnLoad to be |
|
3823 |
// treated like -agentpath: |
|
3824 |
// Must be called before agent libraries are created |
|
3825 |
void Threads::convert_vm_init_libraries_to_agents() { |
|
3826 |
AgentLibrary* agent; |
|
3827 |
AgentLibrary* next; |
|
3828 |
||
3829 |
for (agent = Arguments::libraries(); agent != NULL; agent = next) { |
|
3830 |
next = agent->next(); // cache the next agent now as this agent may get moved off this list |
|
3831 |
OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); |
|
3832 |
||
3833 |
// If there is an JVM_OnLoad function it will get called later, |
|
3834 |
// otherwise see if there is an Agent_OnLoad |
|
3835 |
if (on_load_entry == NULL) { |
|
3836 |
on_load_entry = lookup_agent_on_load(agent); |
|
3837 |
if (on_load_entry != NULL) { |
|
3838 |
// switch it to the agent list -- so that Agent_OnLoad will be called, |
|
3839 |
// JVM_OnLoad won't be attempted and Agent_OnUnload will |
|
3840 |
Arguments::convert_library_to_agent(agent); |
|
3841 |
} else { |
|
3842 |
vm_exit_during_initialization("Could not find JVM_OnLoad or Agent_OnLoad function in the library", agent->name()); |
|
3843 |
} |
|
3844 |
} |
|
3845 |
} |
|
3846 |
} |
|
3847 |
||
3848 |
// Create agents for -agentlib: -agentpath: and converted -Xrun |
|
3849 |
// Invokes Agent_OnLoad |
|
3850 |
// Called very early -- before JavaThreads exist |
|
3851 |
void Threads::create_vm_init_agents() { |
|
3852 |
extern struct JavaVM_ main_vm; |
|
3853 |
AgentLibrary* agent; |
|
3854 |
||
3855 |
JvmtiExport::enter_onload_phase(); |
|
13975
2f7431485cfa
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
13860
diff
changeset
|
3856 |
|
1 | 3857 |
for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { |
3858 |
OnLoadEntry_t on_load_entry = lookup_agent_on_load(agent); |
|
3859 |
||
3860 |
if (on_load_entry != NULL) { |
|
3861 |
// Invoke the Agent_OnLoad function |
|
3862 |
jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); |
|
3863 |
if (err != JNI_OK) { |
|
3864 |
vm_exit_during_initialization("agent library failed to init", agent->name()); |
|
3865 |
} |
|
3866 |
} else { |
|
3867 |
vm_exit_during_initialization("Could not find Agent_OnLoad function in the agent library", agent->name()); |
|
3868 |
} |
|
3869 |
} |
|
3870 |
JvmtiExport::enter_primordial_phase(); |
|
3871 |
} |
|
3872 |
||
3873 |
extern "C" { |
|
3874 |
typedef void (JNICALL *Agent_OnUnload_t)(JavaVM *); |
|
3875 |
} |
|
3876 |
||
3877 |
void Threads::shutdown_vm_agents() { |
|
3878 |
// Send any Agent_OnUnload notifications |
|
3879 |
const char *on_unload_symbols[] = AGENT_ONUNLOAD_SYMBOLS; |
|
3880 |
extern struct JavaVM_ main_vm; |
|
3881 |
for (AgentLibrary* agent = Arguments::agents(); agent != NULL; agent = agent->next()) { |
|
3882 |
||
3883 |
// Find the Agent_OnUnload function. |
|
3884 |
for (uint symbol_index = 0; symbol_index < ARRAY_SIZE(on_unload_symbols); symbol_index++) { |
|
3885 |
Agent_OnUnload_t unload_entry = CAST_TO_FN_PTR(Agent_OnUnload_t, |
|
7405
e6fc8d3926f8
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
7397
diff
changeset
|
3886 |
os::dll_lookup(agent->os_lib(), on_unload_symbols[symbol_index])); |
1 | 3887 |
|
3888 |
// Invoke the Agent_OnUnload function |
|
3889 |
if (unload_entry != NULL) { |
|
3890 |
JavaThread* thread = JavaThread::current(); |
|
3891 |
ThreadToNativeFromVM ttn(thread); |
|
3892 |
HandleMark hm(thread); |
|
3893 |
(*unload_entry)(&main_vm); |
|
3894 |
break; |
|
3895 |
} |
|
3896 |
} |
|
3897 |
} |
|
3898 |
} |
|
3899 |
||
3900 |
// Called for after the VM is initialized for -Xrun libraries which have not been converted to agent libraries |
|
3901 |
// Invokes JVM_OnLoad |
|
3902 |
void Threads::create_vm_init_libraries() { |
|
3903 |
extern struct JavaVM_ main_vm; |
|
3904 |
AgentLibrary* agent; |
|
3905 |
||
3906 |
for (agent = Arguments::libraries(); agent != NULL; agent = agent->next()) { |
|
3907 |
OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); |
|
3908 |
||
3909 |
if (on_load_entry != NULL) { |
|
3910 |
// Invoke the JVM_OnLoad function |
|
3911 |
JavaThread* thread = JavaThread::current(); |
|
3912 |
ThreadToNativeFromVM ttn(thread); |
|
3913 |
HandleMark hm(thread); |
|
3914 |
jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); |
|
3915 |
if (err != JNI_OK) { |
|
3916 |
vm_exit_during_initialization("-Xrun library failed to init", agent->name()); |
|
3917 |
} |
|
3918 |
} else { |
|
3919 |
vm_exit_during_initialization("Could not find JVM_OnLoad function in -Xrun library", agent->name()); |
|
3920 |
} |
|
3921 |
} |
|
3922 |
} |
|
3923 |
||
3924 |
// Last thread running calls java.lang.Shutdown.shutdown() |
|
3925 |
void JavaThread::invoke_shutdown_hooks() { |
|
3926 |
HandleMark hm(this); |
|
3927 |
||
3928 |
// We could get here with a pending exception, if so clear it now. |
|
3929 |
if (this->has_pending_exception()) { |
|
3930 |
this->clear_pending_exception(); |
|
3931 |
} |
|
3932 |
||
3933 |
EXCEPTION_MARK; |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3934 |
Klass* k = |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3935 |
SystemDictionary::resolve_or_null(vmSymbols::java_lang_Shutdown(), |
1 | 3936 |
THREAD); |
3937 |
if (k != NULL) { |
|
3938 |
// SystemDictionary::resolve_or_null will return null if there was |
|
3939 |
// an exception. If we cannot load the Shutdown class, just don't |
|
3940 |
// call Shutdown.shutdown() at all. This will mean the shutdown hooks |
|
3941 |
// and finalizers (if runFinalizersOnExit is set) won't be run. |
|
3942 |
// Note that if a shutdown hook was registered or runFinalizersOnExit |
|
3943 |
// was called, the Shutdown class would have already been loaded |
|
3944 |
// (Runtime.addShutdownHook and runFinalizersOnExit will load it). |
|
3945 |
instanceKlassHandle shutdown_klass (THREAD, k); |
|
3946 |
JavaValue result(T_VOID); |
|
3947 |
JavaCalls::call_static(&result, |
|
3948 |
shutdown_klass, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3949 |
vmSymbols::shutdown_method_name(), |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
8061
diff
changeset
|
3950 |
vmSymbols::void_method_signature(), |
1 | 3951 |
THREAD); |
3952 |
} |
|
3953 |
CLEAR_PENDING_EXCEPTION; |
|
3954 |
} |
|
3955 |
||
3956 |
// Threads::destroy_vm() is normally called from jni_DestroyJavaVM() when |
|
3957 |
// the program falls off the end of main(). Another VM exit path is through |
|
3958 |
// vm_exit() when the program calls System.exit() to return a value or when |
|
3959 |
// there is a serious error in VM. The two shutdown paths are not exactly |
|
3960 |
// the same, but they share Shutdown.shutdown() at Java level and before_exit() |
|
3961 |
// and VM_Exit op at VM level. |
|
3962 |
// |
|
3963 |
// Shutdown sequence: |
|
13195 | 3964 |
// + Shutdown native memory tracking if it is on |
1 | 3965 |
// + Wait until we are the last non-daemon thread to execute |
3966 |
// <-- every thing is still working at this moment --> |
|
3967 |
// + Call java.lang.Shutdown.shutdown(), which will invoke Java level |
|
3968 |
// shutdown hooks, run finalizers if finalization-on-exit |
|
3969 |
// + Call before_exit(), prepare for VM exit |
|
3970 |
// > run VM level shutdown hooks (they are registered through JVM_OnExit(), |
|
3971 |
// currently the only user of this mechanism is File.deleteOnExit()) |
|
3972 |
// > stop flat profiler, StatSampler, watcher thread, CMS threads, |
|
3973 |
// post thread end and vm death events to JVMTI, |
|
3974 |
// stop signal thread |
|
3975 |
// + Call JavaThread::exit(), it will: |
|
3976 |
// > release JNI handle blocks, remove stack guard pages |
|
3977 |
// > remove this thread from Threads list |
|
3978 |
// <-- no more Java code from this thread after this point --> |
|
3979 |
// + Stop VM thread, it will bring the remaining VM to a safepoint and stop |
|
3980 |
// the compiler threads at safepoint |
|
3981 |
// <-- do not use anything that could get blocked by Safepoint --> |
|
3982 |
// + Disable tracing at JNI/JVM barriers |
|
3983 |
// + Set _vm_exited flag for threads that are still running native code |
|
3984 |
// + Delete this thread |
|
3985 |
// + Call exit_globals() |
|
3986 |
// > deletes tty |
|
3987 |
// > deletes PerfMemory resources |
|
3988 |
// + Return to caller |
|
3989 |
||
3990 |
bool Threads::destroy_vm() { |
|
3991 |
JavaThread* thread = JavaThread::current(); |
|
3992 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3993 |
#ifdef ASSERT |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3994 |
_vm_complete = false; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
3995 |
#endif |
1 | 3996 |
// Wait until we are the last non-daemon thread to execute |
3997 |
{ MutexLocker nu(Threads_lock); |
|
3998 |
while (Threads::number_of_non_daemon_threads() > 1 ) |
|
3999 |
// This wait should make safepoint checks, wait without a timeout, |
|
4000 |
// and wait as a suspend-equivalent condition. |
|
4001 |
// |
|
4002 |
// Note: If the FlatProfiler is running and this thread is waiting |
|
4003 |
// for another non-daemon thread to finish, then the FlatProfiler |
|
4004 |
// is waiting for the external suspend request on this thread to |
|
4005 |
// complete. wait_for_ext_suspend_completion() will eventually |
|
4006 |
// timeout, but that takes time. Making this wait a suspend- |
|
4007 |
// equivalent condition solves that timeout problem. |
|
4008 |
// |
|
4009 |
Threads_lock->wait(!Mutex::_no_safepoint_check_flag, 0, |
|
4010 |
Mutex::_as_suspend_equivalent_flag); |
|
4011 |
} |
|
4012 |
||
13195 | 4013 |
// Shutdown NMT before exit. Otherwise, |
4014 |
// it will run into trouble when system destroys static variables. |
|
4015 |
MemTracker::shutdown(MemTracker::NMT_normal); |
|
4016 |
||
1 | 4017 |
// Hang forever on exit if we are reporting an error. |
4018 |
if (ShowMessageBoxOnError && is_error_reported()) { |
|
4019 |
os::infinite_sleep(); |
|
4020 |
} |
|
8476
7e34c2d4cf9b
7022037: Pause when exiting if debugger is attached on windows
sla
parents:
8118
diff
changeset
|
4021 |
os::wait_for_keypress_at_exit(); |
1 | 4022 |
|
4023 |
if (JDK_Version::is_jdk12x_version()) { |
|
4024 |
// We are the last thread running, so check if finalizers should be run. |
|
4025 |
// For 1.3 or later this is done in thread->invoke_shutdown_hooks() |
|
4026 |
HandleMark rm(thread); |
|
4027 |
Universe::run_finalizers_on_exit(); |
|
4028 |
} else { |
|
4029 |
// run Java level shutdown hooks |
|
4030 |
thread->invoke_shutdown_hooks(); |
|
4031 |
} |
|
4032 |
||
4033 |
before_exit(thread); |
|
4034 |
||
4035 |
thread->exit(true); |
|
4036 |
||
4037 |
// Stop VM thread. |
|
4038 |
{ |
|
4039 |
// 4945125 The vm thread comes to a safepoint during exit. |
|
4040 |
// GC vm_operations can get caught at the safepoint, and the |
|
4041 |
// heap is unparseable if they are caught. Grab the Heap_lock |
|
4042 |
// to prevent this. The GC vm_operations will not be able to |
|
4043 |
// queue until after the vm thread is dead. |
|
9992
0d82cce3e655
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
9946
diff
changeset
|
4044 |
// After this point, we'll never emerge out of the safepoint before |
0d82cce3e655
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
9946
diff
changeset
|
4045 |
// the VM exits, so concurrent GC threads do not need to be explicitly |
0d82cce3e655
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
9946
diff
changeset
|
4046 |
// stopped; they remain inactive until the process exits. |
0d82cce3e655
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
9946
diff
changeset
|
4047 |
// Note: some concurrent G1 threads may be running during a safepoint, |
0d82cce3e655
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
9946
diff
changeset
|
4048 |
// but these will not be accessing the heap, just some G1-specific side |
0d82cce3e655
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
9946
diff
changeset
|
4049 |
// data structures that are not accessed by any other threads but them |
0d82cce3e655
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
9946
diff
changeset
|
4050 |
// after this point in a terminal safepoint. |
0d82cce3e655
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
9946
diff
changeset
|
4051 |
|
1 | 4052 |
MutexLocker ml(Heap_lock); |
4053 |
||
4054 |
VMThread::wait_for_vm_thread_exit(); |
|
4055 |
assert(SafepointSynchronize::is_at_safepoint(), "VM thread should exit at Safepoint"); |
|
4056 |
VMThread::destroy(); |
|
4057 |
} |
|
4058 |
||
4059 |
// clean up ideal graph printers |
|
4060 |
#if defined(COMPILER2) && !defined(PRODUCT) |
|
4061 |
IdealGraphPrinter::clean_up(); |
|
4062 |
#endif |
|
4063 |
||
4064 |
// Now, all Java threads are gone except daemon threads. Daemon threads |
|
4065 |
// running Java code or in VM are stopped by the Safepoint. However, |
|
4066 |
// daemon threads executing native code are still running. But they |
|
4067 |
// will be stopped at native=>Java/VM barriers. Note that we can't |
|
4068 |
// simply kill or suspend them, as it is inherently deadlock-prone. |
|
4069 |
||
4070 |
#ifndef PRODUCT |
|
4071 |
// disable function tracing at JNI/JVM barriers |
|
4072 |
TraceJNICalls = false; |
|
4073 |
TraceJVMCalls = false; |
|
4074 |
TraceRuntimeCalls = false; |
|
4075 |
#endif |
|
4076 |
||
4077 |
VM_Exit::set_vm_exited(); |
|
4078 |
||
4079 |
notify_vm_shutdown(); |
|
4080 |
||
4081 |
delete thread; |
|
4082 |
||
4083 |
// exit_globals() will delete tty |
|
4084 |
exit_globals(); |
|
4085 |
||
4086 |
return true; |
|
4087 |
} |
|
4088 |
||
4089 |
||
4090 |
jboolean Threads::is_supported_jni_version_including_1_1(jint version) { |
|
4091 |
if (version == JNI_VERSION_1_1) return JNI_TRUE; |
|
4092 |
return is_supported_jni_version(version); |
|
4093 |
} |
|
4094 |
||
4095 |
||
4096 |
jboolean Threads::is_supported_jni_version(jint version) { |
|
4097 |
if (version == JNI_VERSION_1_2) return JNI_TRUE; |
|
4098 |
if (version == JNI_VERSION_1_4) return JNI_TRUE; |
|
4099 |
if (version == JNI_VERSION_1_6) return JNI_TRUE; |
|
4100 |
return JNI_FALSE; |
|
4101 |
} |
|
4102 |
||
4103 |
||
4104 |
void Threads::add(JavaThread* p, bool force_daemon) { |
|
4105 |
// The threads lock must be owned at this point |
|
4106 |
assert_locked_or_safepoint(Threads_lock); |
|
6768
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
4107 |
|
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
4108 |
// See the comment for this method in thread.hpp for its purpose and |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
4109 |
// why it is called here. |
71338ecb7813
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
6764
diff
changeset
|
4110 |
p->initialize_queues(); |
1 | 4111 |
p->set_next(_thread_list); |
4112 |
_thread_list = p; |
|
4113 |
_number_of_threads++; |
|
4114 |
oop threadObj = p->threadObj(); |
|
4115 |
bool daemon = true; |
|
4116 |
// Bootstrapping problem: threadObj can be null for initial |
|
4117 |
// JavaThread (or for threads attached via JNI) |
|
4118 |
if ((!force_daemon) && (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj))) { |
|
4119 |
_number_of_non_daemon_threads++; |
|
4120 |
daemon = false; |
|
4121 |
} |
|
4122 |
||
13195 | 4123 |
p->set_safepoint_visible(true); |
4124 |
||
1 | 4125 |
ThreadService::add_thread(p, daemon); |
4126 |
||
4127 |
// Possible GC point. |
|
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11480
diff
changeset
|
4128 |
Events::log(p, "Thread added: " INTPTR_FORMAT, p); |
1 | 4129 |
} |
4130 |
||
4131 |
void Threads::remove(JavaThread* p) { |
|
4132 |
// Extra scope needed for Thread_lock, so we can check |
|
4133 |
// that we do not remove thread without safepoint code notice |
|
4134 |
{ MutexLocker ml(Threads_lock); |
|
4135 |
||
4136 |
assert(includes(p), "p must be present"); |
|
4137 |
||
4138 |
JavaThread* current = _thread_list; |
|
4139 |
JavaThread* prev = NULL; |
|
4140 |
||
4141 |
while (current != p) { |
|
4142 |
prev = current; |
|
4143 |
current = current->next(); |
|
4144 |
} |
|
4145 |
||
4146 |
if (prev) { |
|
4147 |
prev->set_next(current->next()); |
|
4148 |
} else { |
|
4149 |
_thread_list = p->next(); |
|
4150 |
} |
|
4151 |
_number_of_threads--; |
|
4152 |
oop threadObj = p->threadObj(); |
|
4153 |
bool daemon = true; |
|
4154 |
if (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj)) { |
|
4155 |
_number_of_non_daemon_threads--; |
|
4156 |
daemon = false; |
|
4157 |
||
4158 |
// Only one thread left, do a notify on the Threads_lock so a thread waiting |
|
4159 |
// on destroy_vm will wake up. |
|
4160 |
if (number_of_non_daemon_threads() == 1) |
|
4161 |
Threads_lock->notify_all(); |
|
4162 |
} |
|
4163 |
ThreadService::remove_thread(p, daemon); |
|
4164 |
||
4165 |
// Make sure that safepoint code disregard this thread. This is needed since |
|
4166 |
// the thread might mess around with locks after this point. This can cause it |
|
4167 |
// to do callbacks into the safepoint code. However, the safepoint code is not aware |
|
4168 |
// of this thread since it is removed from the queue. |
|
4169 |
p->set_terminated_value(); |
|
13195 | 4170 |
|
4171 |
// Now, this thread is not visible to safepoint |
|
4172 |
p->set_safepoint_visible(false); |
|
14120
7d298141c258
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
14083
diff
changeset
|
4173 |
// once the thread becomes safepoint invisible, we can not use its per-thread |
7d298141c258
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
14083
diff
changeset
|
4174 |
// recorder. And Threads::do_threads() no longer walks this thread, so we have |
7d298141c258
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
14083
diff
changeset
|
4175 |
// to release its per-thread recorder here. |
7d298141c258
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
14083
diff
changeset
|
4176 |
MemTracker::thread_exiting(p); |
1 | 4177 |
} // unlock Threads_lock |
4178 |
||
4179 |
// Since Events::log uses a lock, we grab it outside the Threads_lock |
|
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11480
diff
changeset
|
4180 |
Events::log(p, "Thread exited: " INTPTR_FORMAT, p); |
1 | 4181 |
} |
4182 |
||
4183 |
// Threads_lock must be held when this is called (or must be called during a safepoint) |
|
4184 |
bool Threads::includes(JavaThread* p) { |
|
4185 |
assert(Threads_lock->is_locked(), "sanity check"); |
|
4186 |
ALL_JAVA_THREADS(q) { |
|
4187 |
if (q == p ) { |
|
4188 |
return true; |
|
4189 |
} |
|
4190 |
} |
|
4191 |
return false; |
|
4192 |
} |
|
4193 |
||
4194 |
// Operations on the Threads list for GC. These are not explicitly locked, |
|
4195 |
// but the garbage collector must provide a safe context for them to run. |
|
4196 |
// In particular, these things should never be called when the Threads_lock |
|
4197 |
// is held by some other thread. (Note: the Safepoint abstraction also |
|
4198 |
// uses the Threads_lock to gurantee this property. It also makes sure that |
|
4199 |
// all threads gets blocked when exiting or starting). |
|
4200 |
||
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
4201 |
void Threads::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
1 | 4202 |
ALL_JAVA_THREADS(p) { |
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
4203 |
p->oops_do(f, cld_f, cf); |
1 | 4204 |
} |
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
4205 |
VMThread::vm_thread()->oops_do(f, cld_f, cf); |
1 | 4206 |
} |
4207 |
||
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
4208 |
void Threads::possibly_parallel_oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
1 | 4209 |
// Introduce a mechanism allowing parallel threads to claim threads as |
4210 |
// root groups. Overhead should be small enough to use all the time, |
|
4211 |
// even in sequential code. |
|
4212 |
SharedHeap* sh = SharedHeap::heap(); |
|
11174
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10966
diff
changeset
|
4213 |
// Cannot yet substitute active_workers for n_par_threads |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10966
diff
changeset
|
4214 |
// because of G1CollectedHeap::verify() use of |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10966
diff
changeset
|
4215 |
// SharedHeap::process_strong_roots(). n_par_threads == 0 will |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10966
diff
changeset
|
4216 |
// turn off parallelism in process_strong_roots while active_workers |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10966
diff
changeset
|
4217 |
// is being used for parallelism elsewhere. |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10966
diff
changeset
|
4218 |
bool is_par = sh->n_par_threads() > 0; |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10966
diff
changeset
|
4219 |
assert(!is_par || |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10966
diff
changeset
|
4220 |
(SharedHeap::heap()->n_par_threads() == |
fccee5238e70
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
10966
diff
changeset
|
4221 |
SharedHeap::heap()->workers()->active_workers()), "Mismatch"); |
1 | 4222 |
int cp = SharedHeap::heap()->strong_roots_parity(); |
4223 |
ALL_JAVA_THREADS(p) { |
|
4224 |
if (p->claim_oops_do(is_par, cp)) { |
|
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
4225 |
p->oops_do(f, cld_f, cf); |
1 | 4226 |
} |
4227 |
} |
|
4228 |
VMThread* vmt = VMThread::vm_thread(); |
|
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10546
diff
changeset
|
4229 |
if (vmt->claim_oops_do(is_par, cp)) { |
14582
490bb6c0df7c
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
14580
diff
changeset
|
4230 |
vmt->oops_do(f, cld_f, cf); |
10670
4ea0e7d2ffbc
6484982: G1: process references during evacuation pauses
johnc
parents:
10546
diff
changeset
|
4231 |
} |
1 | 4232 |
} |
4233 |
||
4234 |
#ifndef SERIALGC |
|
4235 |
// Used by ParallelScavenge |
|
4236 |
void Threads::create_thread_roots_tasks(GCTaskQueue* q) { |
|
4237 |
ALL_JAVA_THREADS(p) { |
|
4238 |
q->enqueue(new ThreadRootsTask(p)); |
|
4239 |
} |
|
4240 |
q->enqueue(new ThreadRootsTask(VMThread::vm_thread())); |
|
4241 |
} |
|
4242 |
||
4243 |
// Used by Parallel Old |
|
4244 |
void Threads::create_thread_roots_marking_tasks(GCTaskQueue* q) { |
|
4245 |
ALL_JAVA_THREADS(p) { |
|
4246 |
q->enqueue(new ThreadRootsMarkingTask(p)); |
|
4247 |
} |
|
4248 |
q->enqueue(new ThreadRootsMarkingTask(VMThread::vm_thread())); |
|
4249 |
} |
|
4250 |
#endif // SERIALGC |
|
4251 |
||
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3261
diff
changeset
|
4252 |
void Threads::nmethods_do(CodeBlobClosure* cf) { |
1 | 4253 |
ALL_JAVA_THREADS(p) { |
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3261
diff
changeset
|
4254 |
p->nmethods_do(cf); |
1 | 4255 |
} |
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3261
diff
changeset
|
4256 |
VMThread::vm_thread()->nmethods_do(cf); |
1 | 4257 |
} |
4258 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
4259 |
void Threads::metadata_do(void f(Metadata*)) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
4260 |
ALL_JAVA_THREADS(p) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
4261 |
p->metadata_do(f); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
4262 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
4263 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13196
diff
changeset
|
4264 |
|
1 | 4265 |
void Threads::gc_epilogue() { |
4266 |
ALL_JAVA_THREADS(p) { |
|
4267 |
p->gc_epilogue(); |
|
4268 |
} |
|
4269 |
} |
|
4270 |
||
4271 |
void Threads::gc_prologue() { |
|
4272 |
ALL_JAVA_THREADS(p) { |
|
4273 |
p->gc_prologue(); |
|
4274 |
} |
|
4275 |
} |
|
4276 |
||
4277 |
void Threads::deoptimized_wrt_marked_nmethods() { |
|
4278 |
ALL_JAVA_THREADS(p) { |
|
4279 |
p->deoptimized_wrt_marked_nmethods(); |
|
4280 |
} |
|
4281 |
} |
|
4282 |
||
4283 |
||
4284 |
// Get count Java threads that are waiting to enter the specified monitor. |
|
4285 |
GrowableArray<JavaThread*>* Threads::get_pending_threads(int count, |
|
4286 |
address monitor, bool doLock) { |
|
4287 |
assert(doLock || SafepointSynchronize::is_at_safepoint(), |
|
4288 |
"must grab Threads_lock or be at safepoint"); |
|
4289 |
GrowableArray<JavaThread*>* result = new GrowableArray<JavaThread*>(count); |
|
4290 |
||
4291 |
int i = 0; |
|
4292 |
{ |
|
4293 |
MutexLockerEx ml(doLock ? Threads_lock : NULL); |
|
4294 |
ALL_JAVA_THREADS(p) { |
|
4295 |
if (p->is_Compiler_thread()) continue; |
|
4296 |
||
4297 |
address pending = (address)p->current_pending_monitor(); |
|
4298 |
if (pending == monitor) { // found a match |
|
4299 |
if (i < count) result->append(p); // save the first count matches |
|
4300 |
i++; |
|
4301 |
} |
|
4302 |
} |
|
4303 |
} |
|
4304 |
return result; |
|
4305 |
} |
|
4306 |
||
4307 |
||
4308 |
JavaThread *Threads::owning_thread_from_monitor_owner(address owner, bool doLock) { |
|
4309 |
assert(doLock || |
|
4310 |
Threads_lock->owned_by_self() || |
|
4311 |
SafepointSynchronize::is_at_safepoint(), |
|
4312 |
"must grab Threads_lock or be at safepoint"); |
|
4313 |
||
4314 |
// NULL owner means not locked so we can skip the search |
|
4315 |
if (owner == NULL) return NULL; |
|
4316 |
||
4317 |
{ |
|
4318 |
MutexLockerEx ml(doLock ? Threads_lock : NULL); |
|
4319 |
ALL_JAVA_THREADS(p) { |
|
4320 |
// first, see if owner is the address of a Java thread |
|
4321 |
if (owner == (address)p) return p; |
|
4322 |
} |
|
4323 |
} |
|
4324 |
assert(UseHeavyMonitors == false, "Did not find owning Java thread with UseHeavyMonitors enabled"); |
|
4325 |
if (UseHeavyMonitors) return NULL; |
|
4326 |
||
4327 |
// |
|
4328 |
// If we didn't find a matching Java thread and we didn't force use of |
|
4329 |
// heavyweight monitors, then the owner is the stack address of the |
|
4330 |
// Lock Word in the owning Java thread's stack. |
|
4331 |
// |
|
4332 |
JavaThread* the_owner = NULL; |
|
4333 |
{ |
|
4334 |
MutexLockerEx ml(doLock ? Threads_lock : NULL); |
|
4335 |
ALL_JAVA_THREADS(q) { |
|
2526
39a58a50be35
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
2336
diff
changeset
|
4336 |
if (q->is_lock_owned(owner)) { |
1 | 4337 |
the_owner = q; |
2526
39a58a50be35
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
2336
diff
changeset
|
4338 |
break; |
1 | 4339 |
} |
4340 |
} |
|
4341 |
} |
|
4342 |
assert(the_owner != NULL, "Did not find owning Java thread for lock word address"); |
|
4343 |
return the_owner; |
|
4344 |
} |
|
4345 |
||
4346 |
// Threads::print_on() is called at safepoint by VM_PrintThreads operation. |
|
4347 |
void Threads::print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks) { |
|
4348 |
char buf[32]; |
|
4349 |
st->print_cr(os::local_time_string(buf, sizeof(buf))); |
|
4350 |
||
4351 |
st->print_cr("Full thread dump %s (%s %s):", |
|
4352 |
Abstract_VM_Version::vm_name(), |
|
4353 |
Abstract_VM_Version::vm_release(), |
|
4354 |
Abstract_VM_Version::vm_info_string() |
|
4355 |
); |
|
4356 |
st->cr(); |
|
4357 |
||
4358 |
#ifndef SERIALGC |
|
4359 |
// Dump concurrent locks |
|
4360 |
ConcurrentLocksDump concurrent_locks; |
|
4361 |
if (print_concurrent_locks) { |
|
4362 |
concurrent_locks.dump_at_safepoint(); |
|
4363 |
} |
|
4364 |
#endif // SERIALGC |
|
4365 |
||
4366 |
ALL_JAVA_THREADS(p) { |
|
4367 |
ResourceMark rm; |
|
4368 |
p->print_on(st); |
|
4369 |
if (print_stacks) { |
|
4370 |
if (internal_format) { |
|
4371 |
p->trace_stack(); |
|
4372 |
} else { |
|
4373 |
p->print_stack_on(st); |
|
4374 |
} |
|
4375 |
} |
|
4376 |
st->cr(); |
|
4377 |
#ifndef SERIALGC |
|
4378 |
if (print_concurrent_locks) { |
|
4379 |
concurrent_locks.print_locks_on(p, st); |
|
4380 |
} |
|
4381 |
#endif // SERIALGC |
|
4382 |
} |
|
4383 |
||
4384 |
VMThread::vm_thread()->print_on(st); |
|
4385 |
st->cr(); |
|
4386 |
Universe::heap()->print_gc_threads_on(st); |
|
4387 |
WatcherThread* wt = WatcherThread::watcher_thread(); |
|
13857 | 4388 |
if (wt != NULL) { |
4389 |
wt->print_on(st); |
|
4390 |
st->cr(); |
|
4391 |
} |
|
1 | 4392 |
CompileBroker::print_compiler_threads_on(st); |
4393 |
st->flush(); |
|
4394 |
} |
|
4395 |
||
4396 |
// Threads::print_on_error() is called by fatal error handler. It's possible |
|
4397 |
// that VM is not at safepoint and/or current thread is inside signal handler. |
|
4398 |
// Don't print stack trace, as the stack may not be walkable. Don't allocate |
|
4399 |
// memory (even in resource area), it might deadlock the error handler. |
|
4400 |
void Threads::print_on_error(outputStream* st, Thread* current, char* buf, int buflen) { |
|
4401 |
bool found_current = false; |
|
4402 |
st->print_cr("Java Threads: ( => current thread )"); |
|
4403 |
ALL_JAVA_THREADS(thread) { |
|
4404 |
bool is_current = (current == thread); |
|
4405 |
found_current = found_current || is_current; |
|
4406 |
||
4407 |
st->print("%s", is_current ? "=>" : " "); |
|
4408 |
||
4409 |
st->print(PTR_FORMAT, thread); |
|
4410 |
st->print(" "); |
|
4411 |
thread->print_on_error(st, buf, buflen); |
|
4412 |
st->cr(); |
|
4413 |
} |
|
4414 |
st->cr(); |
|
4415 |
||
4416 |
st->print_cr("Other Threads:"); |
|
4417 |
if (VMThread::vm_thread()) { |
|
4418 |
bool is_current = (current == VMThread::vm_thread()); |
|
4419 |
found_current = found_current || is_current; |
|
4420 |
st->print("%s", current == VMThread::vm_thread() ? "=>" : " "); |
|
4421 |
||
4422 |
st->print(PTR_FORMAT, VMThread::vm_thread()); |
|
4423 |
st->print(" "); |
|
4424 |
VMThread::vm_thread()->print_on_error(st, buf, buflen); |
|
4425 |
st->cr(); |
|
4426 |
} |
|
4427 |
WatcherThread* wt = WatcherThread::watcher_thread(); |
|
4428 |
if (wt != NULL) { |
|
4429 |
bool is_current = (current == wt); |
|
4430 |
found_current = found_current || is_current; |
|
4431 |
st->print("%s", is_current ? "=>" : " "); |
|
4432 |
||
4433 |
st->print(PTR_FORMAT, wt); |
|
4434 |
st->print(" "); |
|
4435 |
wt->print_on_error(st, buf, buflen); |
|
4436 |
st->cr(); |
|
4437 |
} |
|
4438 |
if (!found_current) { |
|
4439 |
st->cr(); |
|
4440 |
st->print("=>" PTR_FORMAT " (exited) ", current); |
|
4441 |
current->print_on_error(st, buf, buflen); |
|
4442 |
st->cr(); |
|
4443 |
} |
|
4444 |
} |
|
4445 |
||
6975 | 4446 |
// Internal SpinLock and Mutex |
4447 |
// Based on ParkEvent |
|
4448 |
||
4449 |
// Ad-hoc mutual exclusion primitives: SpinLock and Mux |
|
1 | 4450 |
// |
6975 | 4451 |
// We employ SpinLocks _only for low-contention, fixed-length |
4452 |
// short-duration critical sections where we're concerned |
|
4453 |
// about native mutex_t or HotSpot Mutex:: latency. |
|
4454 |
// The mux construct provides a spin-then-block mutual exclusion |
|
4455 |
// mechanism. |
|
4456 |
// |
|
4457 |
// Testing has shown that contention on the ListLock guarding gFreeList |
|
4458 |
// is common. If we implement ListLock as a simple SpinLock it's common |
|
4459 |
// for the JVM to devolve to yielding with little progress. This is true |
|
4460 |
// despite the fact that the critical sections protected by ListLock are |
|
4461 |
// extremely short. |
|
1 | 4462 |
// |
6975 | 4463 |
// TODO-FIXME: ListLock should be of type SpinLock. |
4464 |
// We should make this a 1st-class type, integrated into the lock |
|
4465 |
// hierarchy as leaf-locks. Critically, the SpinLock structure |
|
4466 |
// should have sufficient padding to avoid false-sharing and excessive |
|
4467 |
// cache-coherency traffic. |
|
4468 |
||
4469 |
||
4470 |
typedef volatile int SpinLockT ; |
|
4471 |
||
4472 |
void Thread::SpinAcquire (volatile int * adr, const char * LockName) { |
|
4473 |
if (Atomic::cmpxchg (1, adr, 0) == 0) { |
|
4474 |
return ; // normal fast-path return |
|
4475 |
} |
|
4476 |
||
4477 |
// Slow-path : We've encountered contention -- Spin/Yield/Block strategy. |
|
4478 |
TEVENT (SpinAcquire - ctx) ; |
|
4479 |
int ctr = 0 ; |
|
4480 |
int Yields = 0 ; |
|
1 | 4481 |
for (;;) { |
6975 | 4482 |
while (*adr != 0) { |
4483 |
++ctr ; |
|
4484 |
if ((ctr & 0xFFF) == 0 || !os::is_MP()) { |
|
4485 |
if (Yields > 5) { |
|
4486 |
// Consider using a simple NakedSleep() instead. |
|
4487 |
// Then SpinAcquire could be called by non-JVM threads |
|
4488 |
Thread::current()->_ParkEvent->park(1) ; |
|
4489 |
} else { |
|
4490 |
os::NakedYield() ; |
|
4491 |
++Yields ; |
|
4492 |
} |
|
4493 |
} else { |
|
4494 |
SpinPause() ; |
|
1 | 4495 |
} |
6975 | 4496 |
} |
4497 |
if (Atomic::cmpxchg (1, adr, 0) == 0) return ; |
|
1 | 4498 |
} |
4499 |
} |
|
4500 |
||
6975 | 4501 |
void Thread::SpinRelease (volatile int * adr) { |
4502 |
assert (*adr != 0, "invariant") ; |
|
4503 |
OrderAccess::fence() ; // guarantee at least release consistency. |
|
4504 |
// Roach-motel semantics. |
|
4505 |
// It's safe if subsequent LDs and STs float "up" into the critical section, |
|
4506 |
// but prior LDs and STs within the critical section can't be allowed |
|
4507 |
// to reorder or float past the ST that releases the lock. |
|
4508 |
*adr = 0 ; |
|
1 | 4509 |
} |
4510 |
||
6975 | 4511 |
// muxAcquire and muxRelease: |
4512 |
// |
|
4513 |
// * muxAcquire and muxRelease support a single-word lock-word construct. |
|
4514 |
// The LSB of the word is set IFF the lock is held. |
|
4515 |
// The remainder of the word points to the head of a singly-linked list |
|
4516 |
// of threads blocked on the lock. |
|
4517 |
// |
|
4518 |
// * The current implementation of muxAcquire-muxRelease uses its own |
|
4519 |
// dedicated Thread._MuxEvent instance. If we're interested in |
|
4520 |
// minimizing the peak number of extant ParkEvent instances then |
|
4521 |
// we could eliminate _MuxEvent and "borrow" _ParkEvent as long |
|
4522 |
// as certain invariants were satisfied. Specifically, care would need |
|
4523 |
// to be taken with regards to consuming unpark() "permits". |
|
4524 |
// A safe rule of thumb is that a thread would never call muxAcquire() |
|
4525 |
// if it's enqueued (cxq, EntryList, WaitList, etc) and will subsequently |
|
4526 |
// park(). Otherwise the _ParkEvent park() operation in muxAcquire() could |
|
4527 |
// consume an unpark() permit intended for monitorenter, for instance. |
|
4528 |
// One way around this would be to widen the restricted-range semaphore |
|
4529 |
// implemented in park(). Another alternative would be to provide |
|
4530 |
// multiple instances of the PlatformEvent() for each thread. One |
|
4531 |
// instance would be dedicated to muxAcquire-muxRelease, for instance. |
|
4532 |
// |
|
4533 |
// * Usage: |
|
4534 |
// -- Only as leaf locks |
|
4535 |
// -- for short-term locking only as muxAcquire does not perform |
|
4536 |
// thread state transitions. |
|
4537 |
// |
|
4538 |
// Alternatives: |
|
4539 |
// * We could implement muxAcquire and muxRelease with MCS or CLH locks |
|
4540 |
// but with parking or spin-then-park instead of pure spinning. |
|
4541 |
// * Use Taura-Oyama-Yonenzawa locks. |
|
4542 |
// * It's possible to construct a 1-0 lock if we encode the lockword as |
|
4543 |
// (List,LockByte). Acquire will CAS the full lockword while Release |
|
4544 |
// will STB 0 into the LockByte. The 1-0 scheme admits stranding, so |
|
4545 |
// acquiring threads use timers (ParkTimed) to detect and recover from |
|
4546 |
// the stranding window. Thread/Node structures must be aligned on 256-byte |
|
4547 |
// boundaries by using placement-new. |
|
4548 |
// * Augment MCS with advisory back-link fields maintained with CAS(). |
|
4549 |
// Pictorially: LockWord -> T1 <-> T2 <-> T3 <-> ... <-> Tn <-> Owner. |
|
4550 |
// The validity of the backlinks must be ratified before we trust the value. |
|
4551 |
// If the backlinks are invalid the exiting thread must back-track through the |
|
4552 |
// the forward links, which are always trustworthy. |
|
4553 |
// * Add a successor indication. The LockWord is currently encoded as |
|
4554 |
// (List, LOCKBIT:1). We could also add a SUCCBIT or an explicit _succ variable |
|
4555 |
// to provide the usual futile-wakeup optimization. |
|
4556 |
// See RTStt for details. |
|
4557 |
// * Consider schedctl.sc_nopreempt to cover the critical section. |
|
4558 |
// |
|
4559 |
||
4560 |
||
4561 |
typedef volatile intptr_t MutexT ; // Mux Lock-word |
|
4562 |
enum MuxBits { LOCKBIT = 1 } ; |
|
4563 |
||
4564 |
void Thread::muxAcquire (volatile intptr_t * Lock, const char * LockName) { |
|
4565 |
intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; |
|
4566 |
if (w == 0) return ; |
|
4567 |
if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { |
|
4568 |
return ; |
|
4569 |
} |
|
4570 |
||
4571 |
TEVENT (muxAcquire - Contention) ; |
|
4572 |
ParkEvent * const Self = Thread::current()->_MuxEvent ; |
|
4573 |
assert ((intptr_t(Self) & LOCKBIT) == 0, "invariant") ; |
|
1 | 4574 |
for (;;) { |
6975 | 4575 |
int its = (os::is_MP() ? 100 : 0) + 1 ; |
4576 |
||
4577 |
// Optional spin phase: spin-then-park strategy |
|
4578 |
while (--its >= 0) { |
|
4579 |
w = *Lock ; |
|
4580 |
if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { |
|
4581 |
return ; |
|
4582 |
} |
|
4583 |
} |
|
4584 |
||
4585 |
Self->reset() ; |
|
4586 |
Self->OnList = intptr_t(Lock) ; |
|
4587 |
// The following fence() isn't _strictly necessary as the subsequent |
|
4588 |
// CAS() both serializes execution and ratifies the fetched *Lock value. |
|
4589 |
OrderAccess::fence(); |
|
4590 |
for (;;) { |
|
4591 |
w = *Lock ; |
|
4592 |
if ((w & LOCKBIT) == 0) { |
|
4593 |
if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { |
|
4594 |
Self->OnList = 0 ; // hygiene - allows stronger asserts |
|
4595 |
return ; |
|
4596 |
} |
|
4597 |
continue ; // Interference -- *Lock changed -- Just retry |
|
1 | 4598 |
} |
6975 | 4599 |
assert (w & LOCKBIT, "invariant") ; |
4600 |
Self->ListNext = (ParkEvent *) (w & ~LOCKBIT ); |
|
4601 |
if (Atomic::cmpxchg_ptr (intptr_t(Self)|LOCKBIT, Lock, w) == w) break ; |
|
4602 |
} |
|
4603 |
||
4604 |
while (Self->OnList != 0) { |
|
4605 |
Self->park() ; |
|
4606 |
} |
|
1 | 4607 |
} |
4608 |
} |
|
4609 |
||
6975 | 4610 |
void Thread::muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) { |
4611 |
intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; |
|
4612 |
if (w == 0) return ; |
|
4613 |
if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { |
|
4614 |
return ; |
|
4615 |
} |
|
4616 |
||
4617 |
TEVENT (muxAcquire - Contention) ; |
|
4618 |
ParkEvent * ReleaseAfter = NULL ; |
|
4619 |
if (ev == NULL) { |
|
4620 |
ev = ReleaseAfter = ParkEvent::Allocate (NULL) ; |
|
4621 |
} |
|
4622 |
assert ((intptr_t(ev) & LOCKBIT) == 0, "invariant") ; |
|
4623 |
for (;;) { |
|
4624 |
guarantee (ev->OnList == 0, "invariant") ; |
|
4625 |
int its = (os::is_MP() ? 100 : 0) + 1 ; |
|
4626 |
||
4627 |
// Optional spin phase: spin-then-park strategy |
|
4628 |
while (--its >= 0) { |
|
4629 |
w = *Lock ; |
|
4630 |
if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { |
|
4631 |
if (ReleaseAfter != NULL) { |
|
4632 |
ParkEvent::Release (ReleaseAfter) ; |
|
4633 |
} |
|
4634 |
return ; |
|
4635 |
} |
|
4636 |
} |
|
4637 |
||
4638 |
ev->reset() ; |
|
4639 |
ev->OnList = intptr_t(Lock) ; |
|
4640 |
// The following fence() isn't _strictly necessary as the subsequent |
|
4641 |
// CAS() both serializes execution and ratifies the fetched *Lock value. |
|
4642 |
OrderAccess::fence(); |
|
4643 |
for (;;) { |
|
4644 |
w = *Lock ; |
|
4645 |
if ((w & LOCKBIT) == 0) { |
|
4646 |
if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { |
|
4647 |
ev->OnList = 0 ; |
|
4648 |
// We call ::Release while holding the outer lock, thus |
|
4649 |
// artificially lengthening the critical section. |
|
4650 |
// Consider deferring the ::Release() until the subsequent unlock(), |
|
4651 |
// after we've dropped the outer lock. |
|
4652 |
if (ReleaseAfter != NULL) { |
|
4653 |
ParkEvent::Release (ReleaseAfter) ; |
|
4654 |
} |
|
4655 |
return ; |
|
4656 |
} |
|
4657 |
continue ; // Interference -- *Lock changed -- Just retry |
|
4658 |
} |
|
4659 |
assert (w & LOCKBIT, "invariant") ; |
|
4660 |
ev->ListNext = (ParkEvent *) (w & ~LOCKBIT ); |
|
4661 |
if (Atomic::cmpxchg_ptr (intptr_t(ev)|LOCKBIT, Lock, w) == w) break ; |
|
4662 |
} |
|
4663 |
||
4664 |
while (ev->OnList != 0) { |
|
4665 |
ev->park() ; |
|
4666 |
} |
|
4667 |
} |
|
4668 |
} |
|
4669 |
||
4670 |
// Release() must extract a successor from the list and then wake that thread. |
|
4671 |
// It can "pop" the front of the list or use a detach-modify-reattach (DMR) scheme |
|
4672 |
// similar to that used by ParkEvent::Allocate() and ::Release(). DMR-based |
|
4673 |
// Release() would : |
|
4674 |
// (A) CAS() or swap() null to *Lock, releasing the lock and detaching the list. |
|
4675 |
// (B) Extract a successor from the private list "in-hand" |
|
4676 |
// (C) attempt to CAS() the residual back into *Lock over null. |
|
4677 |
// If there were any newly arrived threads and the CAS() would fail. |
|
4678 |
// In that case Release() would detach the RATs, re-merge the list in-hand |
|
4679 |
// with the RATs and repeat as needed. Alternately, Release() might |
|
4680 |
// detach and extract a successor, but then pass the residual list to the wakee. |
|
4681 |
// The wakee would be responsible for reattaching and remerging before it |
|
4682 |
// competed for the lock. |
|
4683 |
// |
|
4684 |
// Both "pop" and DMR are immune from ABA corruption -- there can be |
|
4685 |
// multiple concurrent pushers, but only one popper or detacher. |
|
4686 |
// This implementation pops from the head of the list. This is unfair, |
|
4687 |
// but tends to provide excellent throughput as hot threads remain hot. |
|
4688 |
// (We wake recently run threads first). |
|
4689 |
||
4690 |
void Thread::muxRelease (volatile intptr_t * Lock) { |
|
4691 |
for (;;) { |
|
4692 |
const intptr_t w = Atomic::cmpxchg_ptr (0, Lock, LOCKBIT) ; |
|
4693 |
assert (w & LOCKBIT, "invariant") ; |
|
4694 |
if (w == LOCKBIT) return ; |
|
4695 |
ParkEvent * List = (ParkEvent *) (w & ~LOCKBIT) ; |
|
4696 |
assert (List != NULL, "invariant") ; |
|
4697 |
assert (List->OnList == intptr_t(Lock), "invariant") ; |
|
4698 |
ParkEvent * nxt = List->ListNext ; |
|
4699 |
||
4700 |
// The following CAS() releases the lock and pops the head element. |
|
4701 |
if (Atomic::cmpxchg_ptr (intptr_t(nxt), Lock, w) != w) { |
|
4702 |
continue ; |
|
4703 |
} |
|
4704 |
List->OnList = 0 ; |
|
4705 |
OrderAccess::fence() ; |
|
4706 |
List->unpark () ; |
|
4707 |
return ; |
|
4708 |
} |
|
4709 |
} |
|
4710 |
||
4711 |
||
1 | 4712 |
void Threads::verify() { |
4713 |
ALL_JAVA_THREADS(p) { |
|
4714 |
p->verify(); |
|
4715 |
} |
|
4716 |
VMThread* thread = VMThread::vm_thread(); |
|
4717 |
if (thread != NULL) thread->verify(); |
|
4718 |
} |