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src/hotspot/share/runtime/mutexLocker.cpp
385 строк
21 KB
Paul Hohensee
8313081: MonitoringSupport_lock should be unconditionally initialized after 8304074
08 дек 2023, 00:16
08 дек 2023, 00:16
3ea286a
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/* * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "runtime/mutexLocker.hpp" #include "runtime/os.inline.hpp" #include "runtime/safepoint.hpp" #include "runtime/thread.inline.hpp" #include "runtime/vmThread.hpp" // Mutexes used in the VM (see comment in mutexLocker.hpp): // // Note that the following pointers are effectively final -- after having been // set at JVM startup-time, they should never be subsequently mutated. // Instead of using pointers to malloc()ed monitors and mutexes we should consider // eliminating the indirection and using instances instead. // Consider using GCC's __read_mostly. Mutex* Patching_lock = NULL; Monitor* SystemDictionary_lock = NULL; Mutex* SharedDictionary_lock = NULL; Mutex* Module_lock = NULL; Mutex* CompiledIC_lock = NULL; Mutex* InlineCacheBuffer_lock = NULL; Mutex* VMStatistic_lock = NULL; Mutex* JNIGlobalAlloc_lock = NULL; Mutex* JNIGlobalActive_lock = NULL; Mutex* JNIWeakAlloc_lock = NULL; Mutex* JNIWeakActive_lock = NULL; Mutex* StringTableWeakAlloc_lock = NULL; Mutex* StringTableWeakActive_lock = NULL; Mutex* JNIHandleBlockFreeList_lock = NULL; Mutex* VMWeakAlloc_lock = NULL; Mutex* VMWeakActive_lock = NULL; Mutex* ResolvedMethodTable_lock = NULL; Mutex* JmethodIdCreation_lock = NULL; Mutex* JfieldIdCreation_lock = NULL; Monitor* JNICritical_lock = NULL; Mutex* JvmtiThreadState_lock = NULL; Monitor* Heap_lock = NULL; Mutex* ExpandHeap_lock = NULL; Mutex* AdapterHandlerLibrary_lock = NULL; Mutex* SignatureHandlerLibrary_lock = NULL; Mutex* VtableStubs_lock = NULL; Mutex* SymbolTable_lock = NULL; Mutex* StringTable_lock = NULL; Monitor* StringDedupQueue_lock = NULL; Mutex* StringDedupTable_lock = NULL; Monitor* CodeCache_lock = NULL; Mutex* MethodData_lock = NULL; Mutex* TouchedMethodLog_lock = NULL; Mutex* RetData_lock = NULL; Monitor* VMOperationQueue_lock = NULL; Monitor* VMOperationRequest_lock = NULL; Monitor* Safepoint_lock = NULL; Monitor* SerializePage_lock = NULL; Monitor* Threads_lock = NULL; Mutex* NonJavaThreadsList_lock = NULL; Monitor* CGC_lock = NULL; Monitor* STS_lock = NULL; Monitor* FullGCCount_lock = NULL; Mutex* SATB_Q_FL_lock = NULL; Monitor* SATB_Q_CBL_mon = NULL; Mutex* Shared_SATB_Q_lock = NULL; Mutex* DirtyCardQ_FL_lock = NULL; Monitor* DirtyCardQ_CBL_mon = NULL; Mutex* Shared_DirtyCardQ_lock = NULL; Mutex* MarkStackFreeList_lock = NULL; Mutex* MarkStackChunkList_lock = NULL; Mutex* MonitoringSupport_lock = NULL; Mutex* ParGCRareEvent_lock = NULL; Mutex* DerivedPointerTableGC_lock = NULL; Monitor* CGCPhaseManager_lock = NULL; Mutex* Compile_lock = NULL; Monitor* MethodCompileQueue_lock = NULL; Monitor* CompileThread_lock = NULL; Monitor* Compilation_lock = NULL; Mutex* CompileTaskAlloc_lock = NULL; Mutex* CompileStatistics_lock = NULL; Mutex* DirectivesStack_lock = NULL; Mutex* MultiArray_lock = NULL; Monitor* Terminator_lock = NULL; Monitor* BeforeExit_lock = NULL; Monitor* Notify_lock = NULL; Mutex* ProfilePrint_lock = NULL; Mutex* ExceptionCache_lock = NULL; Mutex* OsrList_lock = NULL; Mutex* NMethodSweeperStats_lock = NULL; #ifndef PRODUCT Mutex* FullGCALot_lock = NULL; #endif Mutex* Debug1_lock = NULL; Mutex* Debug2_lock = NULL; Mutex* Debug3_lock = NULL; Mutex* tty_lock = NULL; Mutex* RawMonitor_lock = NULL; Mutex* PerfDataMemAlloc_lock = NULL; Mutex* PerfDataManager_lock = NULL; Mutex* OopMapCacheAlloc_lock = NULL; Mutex* FreeList_lock = NULL; Mutex* OldSets_lock = NULL; Monitor* RootRegionScan_lock = NULL; Monitor* GCTaskManager_lock = NULL; Mutex* Management_lock = NULL; Monitor* Service_lock = NULL; Monitor* PeriodicTask_lock = NULL; Monitor* RedefineClasses_lock = NULL; Mutex* ThreadHeapSampler_lock = NULL; #if INCLUDE_JFR Mutex* JfrStacktrace_lock = NULL; Monitor* JfrMsg_lock = NULL; Mutex* JfrBuffer_lock = NULL; Mutex* JfrStream_lock = NULL; Monitor* JfrThreadSampler_lock = NULL; #endif #if INCLUDE_CDS && INCLUDE_JVMTI Mutex* CDSClassFileStream_lock = NULL; #endif #ifndef SUPPORTS_NATIVE_CX8 Mutex* UnsafeJlong_lock = NULL; #endif Monitor* CodeHeapStateAnalytics_lock = NULL; Mutex* MetaspaceExpand_lock = NULL; Mutex* ClassLoaderDataGraph_lock = NULL; Mutex* ThreadIdTableCreate_lock = NULL; Monitor* ThreadsSMRDelete_lock = NULL; Mutex* SharedDecoder_lock = NULL; Mutex* DCmdFactory_lock = NULL; #define MAX_NUM_MUTEX 128 static Monitor * _mutex_array[MAX_NUM_MUTEX]; static int _num_mutex; #ifdef ASSERT void assert_locked_or_safepoint(const Monitor * lock) { // check if this thread owns the lock (common case) if (IgnoreLockingAssertions) return; assert(lock != NULL, "Need non-NULL lock"); if (lock->owned_by_self()) return; if (SafepointSynchronize::is_at_safepoint()) return; if (!Universe::is_fully_initialized()) return; // see if invoker of VM operation owns it VM_Operation* op = VMThread::vm_operation(); if (op != NULL && op->calling_thread() == lock->owner()) return; fatal("must own lock %s", lock->name()); } // a stronger assertion than the above void assert_lock_strong(const Monitor * lock) { if (IgnoreLockingAssertions) return; assert(lock != NULL, "Need non-NULL lock"); if (lock->owned_by_self()) return; fatal("must own lock %s", lock->name()); } #endif #define def(var, type, pri, vm_block, safepoint_check_allowed ) { \ var = new type(Mutex::pri, #var, vm_block, safepoint_check_allowed); \ assert(_num_mutex < MAX_NUM_MUTEX, "increase MAX_NUM_MUTEX"); \ _mutex_array[_num_mutex++] = var; \ } // Using Padded subclasses to prevent false sharing of these global monitors and mutexes. void mutex_init() { def(tty_lock , PaddedMutex , tty, true, Monitor::_safepoint_check_never); // allow to lock in VM def(CGC_lock , PaddedMonitor, special, true, Monitor::_safepoint_check_never); // coordinate between fore- and background GC def(STS_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never); def(VMWeakAlloc_lock , PaddedMutex , vmweak, true, Monitor::_safepoint_check_never); def(VMWeakActive_lock , PaddedMutex , vmweak-1, true, Monitor::_safepoint_check_never); def(StringTableWeakAlloc_lock , PaddedMutex , vmweak, true, Monitor::_safepoint_check_never); def(StringTableWeakActive_lock , PaddedMutex , vmweak-1, true, Monitor::_safepoint_check_never); if (UseConcMarkSweepGC || UseG1GC) { def(FullGCCount_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never); // in support of ExplicitGCInvokesConcurrent } if (UseG1GC) { def(SATB_Q_FL_lock , PaddedMutex , access, true, Monitor::_safepoint_check_never); def(SATB_Q_CBL_mon , PaddedMonitor, access, true, Monitor::_safepoint_check_never); def(Shared_SATB_Q_lock , PaddedMutex , access + 1, true, Monitor::_safepoint_check_never); def(DirtyCardQ_FL_lock , PaddedMutex , access, true, Monitor::_safepoint_check_never); def(DirtyCardQ_CBL_mon , PaddedMonitor, access, true, Monitor::_safepoint_check_never); def(Shared_DirtyCardQ_lock , PaddedMutex , access + 1, true, Monitor::_safepoint_check_never); def(FreeList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never); def(OldSets_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never); def(RootRegionScan_lock , PaddedMonitor, leaf , true, Monitor::_safepoint_check_never); def(StringDedupQueue_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never); def(StringDedupTable_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); def(MarkStackFreeList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never); def(MarkStackChunkList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never); } def(MonitoringSupport_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never); // used for serviceability monitoring support #if INCLUDE_SHENANDOAHGC if (UseShenandoahGC) { def(SATB_Q_FL_lock , PaddedMutex , access, true, Monitor::_safepoint_check_never); def(SATB_Q_CBL_mon , PaddedMonitor, access, true, Monitor::_safepoint_check_never); def(Shared_SATB_Q_lock , PaddedMutex , access + 1, true, Monitor::_safepoint_check_never); def(StringDedupQueue_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never); def(StringDedupTable_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); } #endif def(ParGCRareEvent_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_sometimes); def(DerivedPointerTableGC_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); def(CGCPhaseManager_lock , PaddedMonitor, leaf, false, Monitor::_safepoint_check_sometimes); def(CodeCache_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never); def(RawMonitor_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never); def(OopMapCacheAlloc_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for oop_map_cache allocation. def(MetaspaceExpand_lock , PaddedMutex , leaf-1, true, Monitor::_safepoint_check_never); def(ClassLoaderDataGraph_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_always); def(Patching_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never); // used for safepointing and code patching. def(Service_lock , PaddedMonitor, special, true, Monitor::_safepoint_check_never); // used for service thread operations def(JmethodIdCreation_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); // used for creating jmethodIDs. def(SystemDictionary_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always); // lookups done by VM thread def(SharedDictionary_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // lookups done by VM thread def(Module_lock , PaddedMutex , leaf+2, true, Monitor::_safepoint_check_always); def(InlineCacheBuffer_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); def(VMStatistic_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); def(ExpandHeap_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // Used during compilation by VM thread def(JNIHandleBlockFreeList_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); // handles are used by VM thread def(SignatureHandlerLibrary_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); def(SymbolTable_lock , PaddedMutex , leaf+2, true, Monitor::_safepoint_check_always); def(StringTable_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); def(ProfilePrint_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // serial profile printing def(ExceptionCache_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // serial profile printing def(OsrList_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); def(Debug1_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); #ifndef PRODUCT def(FullGCALot_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // a lock to make FullGCALot MT safe #endif def(BeforeExit_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always); def(PerfDataMemAlloc_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for allocating PerfData memory for performance data def(PerfDataManager_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for synchronized access to PerfDataManager resources // CMS_modUnionTable_lock leaf // CMS_bitMap_lock leaf 1 // CMS_freeList_lock leaf 2 def(Safepoint_lock , PaddedMonitor, safepoint, true, Monitor::_safepoint_check_sometimes); // locks SnippetCache_lock/Threads_lock def(Threads_lock , PaddedMonitor, barrier, true, Monitor::_safepoint_check_sometimes); def(NonJavaThreadsList_lock , PaddedMutex, leaf, true, Monitor::_safepoint_check_never); def(VMOperationQueue_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_sometimes); // VM_thread allowed to block on these def(VMOperationRequest_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_sometimes); def(RetData_lock , PaddedMutex , nonleaf, false, Monitor::_safepoint_check_always); def(Terminator_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_sometimes); def(VtableStubs_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_always); def(Notify_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_always); // OopStorage-based JNI may lock the alloc_locks while releasing a handle, // while previous JNI didn't need a lock for handle release. This runs afoul // of some places which hold other locks while releasing a handle, including // the Patching_lock, which is of "special" rank. As a temporary workaround, // lower the JNI oopstorage lock ranks to make them super-special. def(JNIGlobalAlloc_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_never); def(JNIGlobalActive_lock , PaddedMutex , nonleaf-1, true, Monitor::_safepoint_check_never); def(JNIWeakAlloc_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_never); def(JNIWeakActive_lock , PaddedMutex , nonleaf-1, true, Monitor::_safepoint_check_never); def(JNICritical_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_always); // used for JNI critical regions def(AdapterHandlerLibrary_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_always); def(Heap_lock , PaddedMonitor, nonleaf+1, false, Monitor::_safepoint_check_sometimes); def(JfieldIdCreation_lock , PaddedMutex , nonleaf+1, true, Monitor::_safepoint_check_always); // jfieldID, Used in VM_Operation def(ResolvedMethodTable_lock , PaddedMutex , nonleaf+1, false, Monitor::_safepoint_check_always); // Used to protect ResolvedMethodTable def(CompiledIC_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); // locks VtableStubs_lock, InlineCacheBuffer_lock def(CompileTaskAlloc_lock , PaddedMutex , nonleaf+2, true, Monitor::_safepoint_check_always); def(CompileStatistics_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); def(DirectivesStack_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never); def(MultiArray_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); // locks SymbolTable_lock def(JvmtiThreadState_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); // Used by JvmtiThreadState/JvmtiEventController def(Management_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); // used for JVM management def(Compile_lock , PaddedMutex , nonleaf+3, true, Monitor::_safepoint_check_sometimes); def(MethodData_lock , PaddedMutex , nonleaf+3, false, Monitor::_safepoint_check_always); def(TouchedMethodLog_lock , PaddedMutex , nonleaf+3, false, Monitor::_safepoint_check_always); def(MethodCompileQueue_lock , PaddedMonitor, nonleaf+4, true, Monitor::_safepoint_check_always); def(Debug2_lock , PaddedMutex , nonleaf+4, true, Monitor::_safepoint_check_never); def(Debug3_lock , PaddedMutex , nonleaf+4, true, Monitor::_safepoint_check_never); def(CompileThread_lock , PaddedMonitor, nonleaf+5, false, Monitor::_safepoint_check_always); def(PeriodicTask_lock , PaddedMonitor, nonleaf+5, true, Monitor::_safepoint_check_sometimes); def(RedefineClasses_lock , PaddedMonitor, nonleaf+5, true, Monitor::_safepoint_check_always); def(ThreadHeapSampler_lock , PaddedMutex, nonleaf, false, Monitor::_safepoint_check_never); if (WhiteBoxAPI) { def(Compilation_lock , PaddedMonitor, leaf, false, Monitor::_safepoint_check_never); } #if INCLUDE_JFR def(JfrMsg_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always); def(JfrBuffer_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); def(JfrStream_lock , PaddedMutex , leaf+1, true, Monitor::_safepoint_check_never); // ensure to rank lower than 'safepoint' def(JfrStacktrace_lock , PaddedMutex , special, true, Monitor::_safepoint_check_sometimes); def(JfrThreadSampler_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never); #endif #ifndef SUPPORTS_NATIVE_CX8 def(UnsafeJlong_lock , PaddedMutex , special, false, Monitor::_safepoint_check_never); #endif def(CodeHeapStateAnalytics_lock , PaddedMutex , nonleaf+6, false, Monitor::_safepoint_check_always); def(ThreadIdTableCreate_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); def(NMethodSweeperStats_lock , PaddedMutex , special, true, Monitor::_safepoint_check_sometimes); def(ThreadsSMRDelete_lock , PaddedMonitor, special, false, Monitor::_safepoint_check_never); def(SharedDecoder_lock , PaddedMutex , native, false, Monitor::_safepoint_check_never); def(DCmdFactory_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); #if INCLUDE_CDS && INCLUDE_JVMTI def(CDSClassFileStream_lock , PaddedMutex , max_nonleaf, false, Monitor::_safepoint_check_always); #endif } GCMutexLocker::GCMutexLocker(Monitor * mutex) { if (SafepointSynchronize::is_at_safepoint()) { _locked = false; } else { _mutex = mutex; _locked = true; _mutex->lock(); } } // Print all mutexes/monitors that are currently owned by a thread; called // by fatal error handler. void print_owned_locks_on_error(outputStream* st) { st->print("VM Mutex/Monitor currently owned by a thread: "); bool none = true; for (int i = 0; i < _num_mutex; i++) { // see if it has an owner if (_mutex_array[i]->owner() != NULL) { if (none) { // print format used by Mutex::print_on_error() st->print_cr(" ([mutex/lock_event])"); none = false; } _mutex_array[i]->print_on_error(st); st->cr(); } } if (none) st->print_cr("None"); }