author | dtitov |
Wed, 25 Sep 2019 11:10:05 -0700 | |
changeset 58340 | f4abe950c3b0 |
parent 58291 | a013100f7a35 |
child 58375 | a1eba2e37671 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
53404 | 2 |
* Copyright (c) 1997, 2019, 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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||
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#include "precompiled.hpp" |
54786 | 26 |
#include "memory/universe.hpp" |
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#include "runtime/mutexLocker.hpp" |
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#include "runtime/os.inline.hpp" |
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#include "runtime/safepoint.hpp" |
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#include "runtime/thread.inline.hpp" |
7397 | 31 |
#include "runtime/vmThread.hpp" |
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33 |
// Mutexes used in the VM (see comment in mutexLocker.hpp): |
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34 |
// |
|
35 |
// Note that the following pointers are effectively final -- after having been |
|
36 |
// set at JVM startup-time, they should never be subsequently mutated. |
|
37 |
// Instead of using pointers to malloc()ed monitors and mutexes we should consider |
|
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// eliminating the indirection and using instances instead. |
|
39 |
// Consider using GCC's __read_mostly. |
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41 |
Mutex* Patching_lock = NULL; |
|
58226 | 42 |
Mutex* CompiledMethod_lock = NULL; |
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Monitor* SystemDictionary_lock = NULL; |
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Mutex* ProtectionDomainSet_lock = NULL; |
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Mutex* SharedDictionary_lock = NULL; |
36508 | 46 |
Mutex* Module_lock = NULL; |
1 | 47 |
Mutex* CompiledIC_lock = NULL; |
48 |
Mutex* InlineCacheBuffer_lock = NULL; |
|
49 |
Mutex* VMStatistic_lock = NULL; |
|
50 |
Mutex* JNIHandleBlockFreeList_lock = NULL; |
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51 |
Mutex* JmethodIdCreation_lock = NULL; |
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52 |
Mutex* JfieldIdCreation_lock = NULL; |
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Monitor* JNICritical_lock = NULL; |
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Mutex* JvmtiThreadState_lock = NULL; |
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Monitor* Heap_lock = NULL; |
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Mutex* ExpandHeap_lock = NULL; |
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Mutex* AdapterHandlerLibrary_lock = NULL; |
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58 |
Mutex* SignatureHandlerLibrary_lock = NULL; |
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Mutex* VtableStubs_lock = NULL; |
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Mutex* SymbolArena_lock = NULL; |
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Monitor* StringDedupQueue_lock = NULL; |
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Mutex* StringDedupTable_lock = NULL; |
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Monitor* CodeCache_lock = NULL; |
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Mutex* MethodData_lock = NULL; |
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Mutex* TouchedMethodLog_lock = NULL; |
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Mutex* RetData_lock = NULL; |
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Monitor* VMOperationQueue_lock = NULL; |
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Monitor* VMOperationRequest_lock = NULL; |
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Monitor* SerializePage_lock = NULL; |
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Monitor* Threads_lock = NULL; |
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Mutex* NonJavaThreadsList_lock = NULL; |
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Mutex* NonJavaThreadsListSync_lock = NULL; |
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Monitor* CGC_lock = NULL; |
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Monitor* STS_lock = NULL; |
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Monitor* FullGCCount_lock = NULL; |
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Monitor* DirtyCardQ_CBL_mon = NULL; |
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Mutex* Shared_DirtyCardQ_lock = NULL; |
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Mutex* MarkStackFreeList_lock = NULL; |
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Mutex* MarkStackChunkList_lock = NULL; |
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Mutex* MonitoringSupport_lock = NULL; |
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Mutex* ParGCRareEvent_lock = NULL; |
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Monitor* CGCPhaseManager_lock = NULL; |
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Mutex* Compile_lock = NULL; |
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Monitor* MethodCompileQueue_lock = NULL; |
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Monitor* CompileThread_lock = NULL; |
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Monitor* Compilation_lock = NULL; |
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Mutex* CompileTaskAlloc_lock = NULL; |
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Mutex* CompileStatistics_lock = NULL; |
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Mutex* DirectivesStack_lock = NULL; |
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Mutex* MultiArray_lock = NULL; |
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Monitor* Terminator_lock = NULL; |
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Monitor* InitCompleted_lock = NULL; |
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Monitor* BeforeExit_lock = NULL; |
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Monitor* Notify_lock = NULL; |
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Mutex* ProfilePrint_lock = NULL; |
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Mutex* ExceptionCache_lock = NULL; |
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Mutex* NMethodSweeperStats_lock = NULL; |
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#ifndef PRODUCT |
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Mutex* FullGCALot_lock = NULL; |
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#endif |
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Mutex* Debug1_lock = NULL; |
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Mutex* Debug2_lock = NULL; |
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Mutex* Debug3_lock = NULL; |
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Mutex* tty_lock = NULL; |
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Mutex* RawMonitor_lock = NULL; |
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Mutex* PerfDataMemAlloc_lock = NULL; |
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Mutex* PerfDataManager_lock = NULL; |
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Mutex* OopMapCacheAlloc_lock = NULL; |
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Mutex* FreeList_lock = NULL; |
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Mutex* OldSets_lock = NULL; |
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Monitor* RootRegionScan_lock = NULL; |
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Mutex* Management_lock = NULL; |
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Monitor* Service_lock = NULL; |
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Monitor* PeriodicTask_lock = NULL; |
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Monitor* RedefineClasses_lock = NULL; |
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121 |
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#if INCLUDE_JFR |
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Mutex* JfrStacktrace_lock = NULL; |
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Monitor* JfrMsg_lock = NULL; |
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Mutex* JfrBuffer_lock = NULL; |
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Mutex* JfrStream_lock = NULL; |
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Monitor* JfrThreadSampler_lock = NULL; |
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#endif |
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|
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#ifndef SUPPORTS_NATIVE_CX8 |
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Mutex* UnsafeJlong_lock = NULL; |
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#endif |
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Mutex* CodeHeapStateAnalytics_lock = NULL; |
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|
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Mutex* MetaspaceExpand_lock = NULL; |
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Mutex* ClassLoaderDataGraph_lock = NULL; |
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Monitor* ThreadsSMRDelete_lock = NULL; |
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Mutex* ThreadIdTableCreate_lock = NULL; |
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Mutex* SharedDecoder_lock = NULL; |
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Mutex* DCmdFactory_lock = NULL; |
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#if INCLUDE_NMT |
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Mutex* NMTQuery_lock = NULL; |
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#endif |
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#if INCLUDE_CDS |
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#if INCLUDE_JVMTI |
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Mutex* CDSClassFileStream_lock = NULL; |
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#endif |
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Mutex* DumpTimeTable_lock = NULL; |
149 |
#endif // INCLUDE_CDS |
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150 |
|
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#if INCLUDE_JVMCI |
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Monitor* JVMCI_lock = NULL; |
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#endif |
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|
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|
1 | 156 |
#define MAX_NUM_MUTEX 128 |
57840 | 157 |
static Mutex* _mutex_array[MAX_NUM_MUTEX]; |
1 | 158 |
static int _num_mutex; |
159 |
||
160 |
#ifdef ASSERT |
|
57840 | 161 |
void assert_locked_or_safepoint(const Mutex* lock) { |
1 | 162 |
// check if this thread owns the lock (common case) |
163 |
if (IgnoreLockingAssertions) return; |
|
164 |
assert(lock != NULL, "Need non-NULL lock"); |
|
165 |
if (lock->owned_by_self()) return; |
|
166 |
if (SafepointSynchronize::is_at_safepoint()) return; |
|
167 |
if (!Universe::is_fully_initialized()) return; |
|
168 |
// see if invoker of VM operation owns it |
|
169 |
VM_Operation* op = VMThread::vm_operation(); |
|
170 |
if (op != NULL && op->calling_thread() == lock->owner()) return; |
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171 |
fatal("must own lock %s", lock->name()); |
1 | 172 |
} |
173 |
||
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174 |
// a weaker assertion than the above |
57840 | 175 |
void assert_locked_or_safepoint_weak(const Mutex* lock) { |
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if (IgnoreLockingAssertions) return; |
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assert(lock != NULL, "Need non-NULL lock"); |
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if (lock->is_locked()) return; |
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if (SafepointSynchronize::is_at_safepoint()) return; |
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180 |
if (!Universe::is_fully_initialized()) return; |
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fatal("must own lock %s", lock->name()); |
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182 |
} |
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183 |
|
1 | 184 |
// a stronger assertion than the above |
57840 | 185 |
void assert_lock_strong(const Mutex* lock) { |
1 | 186 |
if (IgnoreLockingAssertions) return; |
187 |
assert(lock != NULL, "Need non-NULL lock"); |
|
188 |
if (lock->owned_by_self()) return; |
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189 |
fatal("must own lock %s", lock->name()); |
1 | 190 |
} |
191 |
#endif |
|
192 |
||
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193 |
#define def(var, type, pri, vm_block, safepoint_check_allowed ) { \ |
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194 |
var = new type(Mutex::pri, #var, vm_block, safepoint_check_allowed); \ |
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195 |
assert(_num_mutex < MAX_NUM_MUTEX, "increase MAX_NUM_MUTEX"); \ |
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196 |
_mutex_array[_num_mutex++] = var; \ |
1 | 197 |
} |
198 |
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// Using Padded subclasses to prevent false sharing of these global monitors and mutexes. |
1 | 200 |
void mutex_init() { |
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201 |
def(tty_lock , PaddedMutex , tty, true, Monitor::_safepoint_check_never); // allow to lock in VM |
1 | 202 |
|
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203 |
def(CGC_lock , PaddedMonitor, special, true, Monitor::_safepoint_check_never); // coordinate between fore- and background GC |
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204 |
def(STS_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never); |
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205 |
|
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206 |
def(FullGCCount_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never); // in support of ExplicitGCInvokesConcurrent |
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207 |
if (UseG1GC) { |
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208 |
def(DirtyCardQ_CBL_mon , PaddedMonitor, access, true, Monitor::_safepoint_check_never); |
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def(Shared_DirtyCardQ_lock , PaddedMutex , access + 1, true, Monitor::_safepoint_check_never); |
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210 |
|
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def(FreeList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never); |
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def(OldSets_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never); |
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def(RootRegionScan_lock , PaddedMonitor, leaf , true, Monitor::_safepoint_check_never); |
23472 | 214 |
|
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def(StringDedupQueue_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never); |
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def(StringDedupTable_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); |
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|
217 |
|
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def(MarkStackFreeList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never); |
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def(MarkStackChunkList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never); |
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220 |
|
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221 |
def(MonitoringSupport_lock , PaddedMutex , native , true, Monitor::_safepoint_check_never); // used for serviceability monitoring support |
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} |
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if (UseShenandoahGC) { |
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def(StringDedupQueue_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never); |
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225 |
def(StringDedupTable_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); |
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} |
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227 |
def(ParGCRareEvent_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_always); |
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228 |
def(CGCPhaseManager_lock , PaddedMonitor, leaf, false, Monitor::_safepoint_check_always); |
57840 | 229 |
def(CodeCache_lock , PaddedMonitor, special, true, Monitor::_safepoint_check_never); |
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230 |
def(RawMonitor_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never); |
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231 |
def(OopMapCacheAlloc_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for oop_map_cache allocation. |
1 | 232 |
|
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def(MetaspaceExpand_lock , PaddedMutex , leaf-1, true, Monitor::_safepoint_check_never); |
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234 |
def(ClassLoaderDataGraph_lock , PaddedMutex , nonleaf, false, Monitor::_safepoint_check_always); |
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|
235 |
|
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|
236 |
def(Patching_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never); // used for safepointing and code patching. |
58226 | 237 |
def(CompiledMethod_lock , PaddedMutex , special-1, true, Monitor::_safepoint_check_never); |
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238 |
def(Service_lock , PaddedMonitor, special, true, Monitor::_safepoint_check_never); // used for service thread operations |
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239 |
def(JmethodIdCreation_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for creating jmethodIDs. |
1 | 240 |
|
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241 |
def(SystemDictionary_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always); |
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|
242 |
def(ProtectionDomainSet_lock , PaddedMutex , leaf-1, true, Monitor::_safepoint_check_never); |
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|
243 |
def(SharedDictionary_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); |
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|
244 |
def(Module_lock , PaddedMutex , leaf+2, false, Monitor::_safepoint_check_always); |
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|
245 |
def(InlineCacheBuffer_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); |
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|
246 |
def(VMStatistic_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); |
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|
247 |
def(ExpandHeap_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // Used during compilation by VM thread |
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|
248 |
def(JNIHandleBlockFreeList_lock , PaddedMutex , leaf-1, true, Monitor::_safepoint_check_never); // handles are used by VM thread |
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|
249 |
def(SignatureHandlerLibrary_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); |
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|
250 |
def(SymbolArena_lock , PaddedMutex , leaf+2, true, Monitor::_safepoint_check_never); |
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|
251 |
def(ProfilePrint_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // serial profile printing |
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|
252 |
def(ExceptionCache_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // serial profile printing |
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|
253 |
def(Debug1_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); |
1 | 254 |
#ifndef PRODUCT |
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|
255 |
def(FullGCALot_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // a lock to make FullGCALot MT safe |
1 | 256 |
#endif |
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|
257 |
def(BeforeExit_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always); |
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258 |
def(PerfDataMemAlloc_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for allocating PerfData memory for performance data |
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|
259 |
def(PerfDataManager_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for synchronized access to PerfDataManager resources |
1 | 260 |
|
261 |
// CMS_modUnionTable_lock leaf |
|
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|
262 |
// CMS_bitMap_lock leaf 1 |
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|
263 |
// CMS_freeList_lock leaf 2 |
1 | 264 |
|
57699
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8226228: Make Threads_lock an always safepoint checked lock.
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|
265 |
def(Threads_lock , PaddedMonitor, barrier, true, Monitor::_safepoint_check_always); // Used for safepoint protocol. |
51548 | 266 |
def(NonJavaThreadsList_lock , PaddedMutex, leaf, true, Monitor::_safepoint_check_never); |
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|
267 |
def(NonJavaThreadsListSync_lock , PaddedMutex, leaf, true, Monitor::_safepoint_check_never); |
1 | 268 |
|
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|
269 |
def(VMOperationQueue_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_never); // VM_thread allowed to block on these |
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|
270 |
def(VMOperationRequest_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_always); |
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|
271 |
def(RetData_lock , PaddedMutex , nonleaf, false, Monitor::_safepoint_check_always); |
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|
272 |
def(Terminator_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_always); |
54301
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|
273 |
def(InitCompleted_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never); |
52857
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|
274 |
def(VtableStubs_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_never); |
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|
275 |
def(Notify_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_always); |
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|
276 |
def(JNICritical_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_always); // used for JNI critical regions |
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|
277 |
def(AdapterHandlerLibrary_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_always); |
28163
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|
278 |
|
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|
279 |
def(Heap_lock , PaddedMonitor, nonleaf+1, false, Monitor::_safepoint_check_sometimes); // Doesn't safepoint check during termination. |
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|
280 |
def(JfieldIdCreation_lock , PaddedMutex , nonleaf+1, true, Monitor::_safepoint_check_always); // jfieldID, Used in VM_Operation |
1 | 281 |
|
52857
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|
282 |
def(CompiledIC_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_never); // locks VtableStubs_lock, InlineCacheBuffer_lock |
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|
283 |
def(CompileTaskAlloc_lock , PaddedMutex , nonleaf+2, true, Monitor::_safepoint_check_always); |
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|
284 |
def(CompileStatistics_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); |
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|
285 |
def(DirectivesStack_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never); |
51520
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|
286 |
def(MultiArray_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); |
1 | 287 |
|
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|
288 |
def(JvmtiThreadState_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); // Used by JvmtiThreadState/JvmtiEventController |
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|
289 |
def(Management_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); // used for JVM management |
1 | 290 |
|
53469
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8216136: Take Compile_lock for SystemDictionary::_modification_counter with safepoint check
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|
291 |
def(Compile_lock , PaddedMutex , nonleaf+3, true, Monitor::_safepoint_check_always); |
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|
292 |
def(MethodData_lock , PaddedMutex , nonleaf+3, false, Monitor::_safepoint_check_always); |
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|
293 |
def(TouchedMethodLog_lock , PaddedMutex , nonleaf+3, false, Monitor::_safepoint_check_always); |
1 | 294 |
|
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|
295 |
def(MethodCompileQueue_lock , PaddedMonitor, nonleaf+4, false, Monitor::_safepoint_check_always); |
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|
296 |
def(Debug2_lock , PaddedMutex , nonleaf+4, true, Monitor::_safepoint_check_never); |
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|
297 |
def(Debug3_lock , PaddedMutex , nonleaf+4, true, Monitor::_safepoint_check_never); |
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|
298 |
def(CompileThread_lock , PaddedMonitor, nonleaf+5, false, Monitor::_safepoint_check_always); |
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|
299 |
def(PeriodicTask_lock , PaddedMonitor, nonleaf+5, true, Monitor::_safepoint_check_always); |
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|
300 |
def(RedefineClasses_lock , PaddedMonitor, nonleaf+5, true, Monitor::_safepoint_check_always); |
50578
e2a7f431f65c
8203394: Implementation of JEP 331: Low-Overhead Heap Profiling
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|
301 |
|
27642
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8059624: Test task: WhiteBox API for testing segmented codecache feature
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|
302 |
if (WhiteBoxAPI) { |
41710
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|
303 |
def(Compilation_lock , PaddedMonitor, leaf, false, Monitor::_safepoint_check_never); |
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|
304 |
} |
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|
305 |
|
50113 | 306 |
#if INCLUDE_JFR |
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|
307 |
def(JfrMsg_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always); |
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|
308 |
def(JfrBuffer_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); |
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|
309 |
def(JfrStream_lock , PaddedMutex , leaf+1, true, Monitor::_safepoint_check_never); // ensure to rank lower than 'safepoint' |
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|
310 |
def(JfrStacktrace_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never); |
52448
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8213137: Remove static initialization of monitor/mutex instances
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|
311 |
def(JfrThreadSampler_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never); |
19542
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8023457: Event based tracing framework needs a mutex for thread groups
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|
312 |
#endif |
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|
313 |
|
27874
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8035663: Suspicious failure of test java/util/concurrent/Phaser/FickleRegister.java
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|
314 |
#ifndef SUPPORTS_NATIVE_CX8 |
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|
315 |
def(UnsafeJlong_lock , PaddedMutex , special, false, Monitor::_safepoint_check_never); |
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316 |
#endif |
49611 | 317 |
|
318 |
def(CodeHeapStateAnalytics_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); |
|
54663
f03d5a093093
8074355: make MutexLocker smarter about non-JavaThreads
coleenp
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changeset
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319 |
def(NMethodSweeperStats_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never); |
58291
a013100f7a35
8213150: Add verification for locking by VMThread
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changeset
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320 |
def(ThreadsSMRDelete_lock , PaddedMonitor, special, true, Monitor::_safepoint_check_never); |
58340
f4abe950c3b0
8185005: Improve performance of ThreadMXBean.getThreadInfo(long ids[], int maxDepth)
dtitov
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changeset
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321 |
def(ThreadIdTableCreate_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); |
52448
bc5c7f63dbae
8213137: Remove static initialization of monitor/mutex instances
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changeset
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322 |
def(SharedDecoder_lock , PaddedMutex , native, false, Monitor::_safepoint_check_never); |
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changeset
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323 |
def(DCmdFactory_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); |
52581
d402a406bbc3
8213723: More Monitor/mutex initialization management
dholmes
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changeset
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324 |
#if INCLUDE_NMT |
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8213723: More Monitor/mutex initialization management
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325 |
def(NMTQuery_lock , PaddedMutex , max_nonleaf, false, Monitor::_safepoint_check_always); |
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326 |
#endif |
54927 | 327 |
#if INCLUDE_CDS |
328 |
#if INCLUDE_JVMTI |
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8218751: Do not store original classfiles inside the CDS archive
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def(CDSClassFileStream_lock , PaddedMutex , max_nonleaf, false, Monitor::_safepoint_check_always); |
1a7b57d02107
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53775
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changeset
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330 |
#endif |
54669
ad45b3802d4e
8220623: [JVMCI] Update JVMCI to support JVMCI based Compiler compiled into shared library
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changeset
|
331 |
|
ad45b3802d4e
8220623: [JVMCI] Update JVMCI to support JVMCI based Compiler compiled into shared library
kvn
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332 |
#if INCLUDE_JVMCI |
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8220623: [JVMCI] Update JVMCI to support JVMCI based Compiler compiled into shared library
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changeset
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333 |
def(JVMCI_lock , PaddedMonitor, nonleaf+2, true, Monitor::_safepoint_check_always); |
ad45b3802d4e
8220623: [JVMCI] Update JVMCI to support JVMCI based Compiler compiled into shared library
kvn
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changeset
|
334 |
#endif |
54927 | 335 |
def(DumpTimeTable_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); |
336 |
#endif // INCLUDE_CDS |
|
1 | 337 |
} |
338 |
||
57840 | 339 |
GCMutexLocker::GCMutexLocker(Mutex* mutex) { |
1 | 340 |
if (SafepointSynchronize::is_at_safepoint()) { |
341 |
_locked = false; |
|
342 |
} else { |
|
343 |
_mutex = mutex; |
|
344 |
_locked = true; |
|
345 |
_mutex->lock(); |
|
346 |
} |
|
347 |
} |
|
348 |
||
349 |
// Print all mutexes/monitors that are currently owned by a thread; called |
|
350 |
// by fatal error handler. |
|
351 |
void print_owned_locks_on_error(outputStream* st) { |
|
352 |
st->print("VM Mutex/Monitor currently owned by a thread: "); |
|
353 |
bool none = true; |
|
354 |
for (int i = 0; i < _num_mutex; i++) { |
|
355 |
// see if it has an owner |
|
356 |
if (_mutex_array[i]->owner() != NULL) { |
|
357 |
if (none) { |
|
358 |
// print format used by Mutex::print_on_error() |
|
359 |
st->print_cr(" ([mutex/lock_event])"); |
|
360 |
none = false; |
|
361 |
} |
|
362 |
_mutex_array[i]->print_on_error(st); |
|
363 |
st->cr(); |
|
364 |
} |
|
365 |
} |
|
366 |
if (none) st->print_cr("None"); |
|
367 |
} |