diff -r fd16c54261b3 -r 489c9b5090e2 hotspot/src/share/vm/runtime/mutexLocker.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hotspot/src/share/vm/runtime/mutexLocker.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,266 @@ +/* + * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +#include "incls/_precompiled.incl" +#include "incls/_mutexLocker.cpp.incl" + +// 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* PackageTable_lock = NULL; +Mutex* CompiledIC_lock = NULL; +Mutex* InlineCacheBuffer_lock = NULL; +Mutex* VMStatistic_lock = NULL; +Mutex* JNIGlobalHandle_lock = NULL; +Mutex* JNIHandleBlockFreeList_lock = NULL; +Mutex* JNICachedItableIndex_lock = NULL; +Mutex* JmethodIdCreation_lock = NULL; +Mutex* JfieldIdCreation_lock = NULL; +Monitor* JNICritical_lock = NULL; +Mutex* JvmtiThreadState_lock = NULL; +Monitor* JvmtiPendingEvent_lock = NULL; +Mutex* 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; +Mutex* CodeCache_lock = NULL; +Mutex* MethodData_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; +Monitor* CGC_lock = NULL; +Mutex* STS_init_lock = NULL; +Monitor* SLT_lock = NULL; +Monitor* iCMS_lock = NULL; +Monitor* FullGCCount_lock = NULL; +Mutex* ParGCRareEvent_lock = NULL; +Mutex* DerivedPointerTableGC_lock = NULL; +Mutex* Compile_lock = NULL; +Monitor* MethodCompileQueue_lock = NULL; +#ifdef TIERED +Monitor* C1_lock = NULL; +#endif // TIERED +Monitor* CompileThread_lock = NULL; +Mutex* CompileTaskAlloc_lock = NULL; +Mutex* CompileStatistics_lock = NULL; +Mutex* MultiArray_lock = NULL; +Monitor* Terminator_lock = NULL; +Monitor* BeforeExit_lock = NULL; +Monitor* Notify_lock = NULL; +Monitor* Interrupt_lock = NULL; +Monitor* ProfileVM_lock = NULL; +Mutex* ProfilePrint_lock = NULL; +Mutex* ExceptionCache_lock = NULL; +Monitor* ObjAllocPost_lock = NULL; +Mutex* OsrList_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; + +Monitor* GCTaskManager_lock = NULL; + +Mutex* Management_lock = NULL; +Monitor* LowMemory_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; + fatal1("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; + fatal1("must own lock %s", lock->name()); +} +#endif + +#define def(var, type, pri, vm_block) { \ + var = new type(Mutex::pri, #var, vm_block); \ + assert(_num_mutex < MAX_NUM_MUTEX, \ + "increase MAX_NUM_MUTEX"); \ + _mutex_array[_num_mutex++] = var; \ +} + +void mutex_init() { + def(tty_lock , Mutex , event, true ); // allow to lock in VM + + def(CGC_lock , Monitor, special, true ); // coordinate between fore- and background GC + def(STS_init_lock , Mutex, leaf, true ); + if (UseConcMarkSweepGC) { + def(iCMS_lock , Monitor, special, true ); // CMS incremental mode start/stop notification + def(FullGCCount_lock , Monitor, leaf, true ); // in support of ExplicitGCInvokesConcurrent + } + def(ParGCRareEvent_lock , Mutex , leaf , true ); + def(DerivedPointerTableGC_lock , Mutex, leaf, true ); + def(CodeCache_lock , Mutex , special, true ); + def(Interrupt_lock , Monitor, special, true ); // used for interrupt processing + def(RawMonitor_lock , Mutex, special, true ); + def(OopMapCacheAlloc_lock , Mutex, leaf, true ); // used for oop_map_cache allocation. + + def(Patching_lock , Mutex , special, true ); // used for safepointing and code patching. + def(ObjAllocPost_lock , Monitor, special, false); + def(LowMemory_lock , Monitor, special, true ); // used for low memory detection + def(JmethodIdCreation_lock , Mutex , leaf, true ); // used for creating jmethodIDs. + + def(SystemDictionary_lock , Monitor, leaf, true ); // lookups done by VM thread + def(PackageTable_lock , Mutex , leaf, false); + def(InlineCacheBuffer_lock , Mutex , leaf, true ); + def(VMStatistic_lock , Mutex , leaf, false); + def(ExpandHeap_lock , Mutex , leaf, true ); // Used during compilation by VM thread + def(JNIHandleBlockFreeList_lock , Mutex , leaf, true ); // handles are used by VM thread + def(SignatureHandlerLibrary_lock , Mutex , leaf, false); + def(SymbolTable_lock , Mutex , leaf, true ); + def(StringTable_lock , Mutex , leaf, true ); + def(ProfilePrint_lock , Mutex , leaf, false); // serial profile printing + def(ExceptionCache_lock , Mutex , leaf, false); // serial profile printing + def(OsrList_lock , Mutex , leaf, true ); + def(Debug1_lock , Mutex , leaf, true ); +#ifndef PRODUCT + def(FullGCALot_lock , Mutex , leaf, false); // a lock to make FullGCALot MT safe +#endif + def(BeforeExit_lock , Monitor, leaf, true ); + def(PerfDataMemAlloc_lock , Mutex , leaf, true ); // used for allocating PerfData memory for performance data + def(PerfDataManager_lock , Mutex , leaf, true ); // used for synchronized access to PerfDataManager resources + + // CMS_modUnionTable_lock leaf + // CMS_bitMap_lock leaf + 1 + // CMS_freeList_lock leaf + 2 + + def(Safepoint_lock , Monitor, safepoint, true ); // locks SnippetCache_lock/Threads_lock + + if (!UseMembar) { + def(SerializePage_lock , Monitor, leaf, true ); + } + + def(Threads_lock , Monitor, barrier, true ); + + def(VMOperationQueue_lock , Monitor, nonleaf, true ); // VM_thread allowed to block on these + def(VMOperationRequest_lock , Monitor, nonleaf, true ); + def(RetData_lock , Mutex , nonleaf, false); + def(Terminator_lock , Monitor, nonleaf, true ); + def(VtableStubs_lock , Mutex , nonleaf, true ); + def(Notify_lock , Monitor, nonleaf, true ); + def(JNIGlobalHandle_lock , Mutex , nonleaf, true ); // locks JNIHandleBlockFreeList_lock + def(JNICritical_lock , Monitor, nonleaf, true ); // used for JNI critical regions + def(AdapterHandlerLibrary_lock , Mutex , nonleaf, true); + if (UseConcMarkSweepGC) { + def(SLT_lock , Monitor, nonleaf, false ); + // used in CMS GC for locking PLL lock + } + def(Heap_lock , Mutex , nonleaf+1, false); + def(JfieldIdCreation_lock , Mutex , nonleaf+1, true ); // jfieldID, Used in VM_Operation + def(JNICachedItableIndex_lock , Mutex , nonleaf+1, false); // Used to cache an itable index during JNI invoke + + def(CompiledIC_lock , Mutex , nonleaf+2, false); // locks VtableStubs_lock, InlineCacheBuffer_lock + def(CompileTaskAlloc_lock , Mutex , nonleaf+2, true ); + def(CompileStatistics_lock , Mutex , nonleaf+2, false); + def(MultiArray_lock , Mutex , nonleaf+2, false); // locks SymbolTable_lock + + def(JvmtiThreadState_lock , Mutex , nonleaf+2, false); // Used by JvmtiThreadState/JvmtiEventController + def(JvmtiPendingEvent_lock , Monitor, nonleaf, false); // Used by JvmtiCodeBlobEvents + def(Management_lock , Mutex , nonleaf+2, false); // used for JVM management + + def(Compile_lock , Mutex , nonleaf+3, true ); + def(MethodData_lock , Mutex , nonleaf+3, false); + + def(MethodCompileQueue_lock , Monitor, nonleaf+4, true ); + def(Debug2_lock , Mutex , nonleaf+4, true ); + def(Debug3_lock , Mutex , nonleaf+4, true ); + def(ProfileVM_lock , Monitor, nonleaf+4, false); // used for profiling of the VMThread + def(CompileThread_lock , Monitor, nonleaf+5, false ); +#ifdef TIERED + def(C1_lock , Monitor, nonleaf+5, false ); +#endif // TIERED + + +} + +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"); +}