• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/runtime/mutexLocker.cpp@7ae4e26cb1e0 (annotated)

src/share/vm/runtime/mutexLocker.cpp

Thu, 12 Oct 2017 21:27:07 +0800

author

aoqi

date

Thu, 12 Oct 2017 21:27:07 +0800

changeset 7535

7ae4e26cb1e0

parent 6906

581e70386ec9

parent 6876

710a3c8b516e

child 7994

04ff2f6cd0eb

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#include "precompiled.hpp"
aoqi@0	26	#include "runtime/mutexLocker.hpp"
aoqi@0	27	#include "runtime/safepoint.hpp"
aoqi@0	28	#include "runtime/thread.inline.hpp"
aoqi@0	29	#include "runtime/threadLocalStorage.hpp"
aoqi@0	30	#include "runtime/vmThread.hpp"
aoqi@0	31
aoqi@0	32	// Mutexes used in the VM (see comment in mutexLocker.hpp):
aoqi@0	33	//
aoqi@0	34	// Note that the following pointers are effectively final -- after having been
aoqi@0	35	// set at JVM startup-time, they should never be subsequently mutated.
aoqi@0	36	// Instead of using pointers to malloc()ed monitors and mutexes we should consider
aoqi@0	37	// eliminating the indirection and using instances instead.
aoqi@0	38	// Consider using GCC's __read_mostly.
aoqi@0	39
aoqi@0	40	Mutex* Patching_lock = NULL;
aoqi@0	41	Monitor* SystemDictionary_lock = NULL;
aoqi@0	42	Mutex* PackageTable_lock = NULL;
aoqi@0	43	Mutex* CompiledIC_lock = NULL;
aoqi@0	44	Mutex* InlineCacheBuffer_lock = NULL;
aoqi@0	45	Mutex* VMStatistic_lock = NULL;
aoqi@0	46	Mutex* JNIGlobalHandle_lock = NULL;
aoqi@0	47	Mutex* JNIHandleBlockFreeList_lock = NULL;
aoqi@0	48	Mutex* MemberNameTable_lock = NULL;
aoqi@0	49	Mutex* JmethodIdCreation_lock = NULL;
aoqi@0	50	Mutex* JfieldIdCreation_lock = NULL;
aoqi@0	51	Monitor* JNICritical_lock = NULL;
aoqi@0	52	Mutex* JvmtiThreadState_lock = NULL;
aoqi@0	53	Monitor* JvmtiPendingEvent_lock = NULL;
aoqi@0	54	Monitor* Heap_lock = NULL;
aoqi@0	55	Mutex* ExpandHeap_lock = NULL;
aoqi@0	56	Mutex* AdapterHandlerLibrary_lock = NULL;
aoqi@0	57	Mutex* SignatureHandlerLibrary_lock = NULL;
aoqi@0	58	Mutex* VtableStubs_lock = NULL;
aoqi@0	59	Mutex* SymbolTable_lock = NULL;
aoqi@0	60	Mutex* StringTable_lock = NULL;
aoqi@0	61	Monitor* StringDedupQueue_lock = NULL;
aoqi@0	62	Mutex* StringDedupTable_lock = NULL;
aoqi@0	63	Mutex* CodeCache_lock = NULL;
aoqi@0	64	Mutex* MethodData_lock = NULL;
aoqi@0	65	Mutex* RetData_lock = NULL;
aoqi@0	66	Monitor* VMOperationQueue_lock = NULL;
aoqi@0	67	Monitor* VMOperationRequest_lock = NULL;
aoqi@0	68	Monitor* Safepoint_lock = NULL;
aoqi@0	69	Monitor* SerializePage_lock = NULL;
aoqi@0	70	Monitor* Threads_lock = NULL;
aoqi@0	71	Monitor* CGC_lock = NULL;
pliden@6906	72	Monitor* STS_lock = NULL;
aoqi@0	73	Monitor* SLT_lock = NULL;
aoqi@0	74	Monitor* iCMS_lock = NULL;
aoqi@0	75	Monitor* FullGCCount_lock = NULL;
aoqi@0	76	Monitor* CMark_lock = NULL;
aoqi@0	77	Mutex* CMRegionStack_lock = NULL;
aoqi@0	78	Mutex* SATB_Q_FL_lock = NULL;
aoqi@0	79	Monitor* SATB_Q_CBL_mon = NULL;
aoqi@0	80	Mutex* Shared_SATB_Q_lock = NULL;
aoqi@0	81	Mutex* DirtyCardQ_FL_lock = NULL;
aoqi@0	82	Monitor* DirtyCardQ_CBL_mon = NULL;
aoqi@0	83	Mutex* Shared_DirtyCardQ_lock = NULL;
aoqi@0	84	Mutex* ParGCRareEvent_lock = NULL;
aoqi@0	85	Mutex* EvacFailureStack_lock = NULL;
aoqi@0	86	Mutex* DerivedPointerTableGC_lock = NULL;
aoqi@0	87	Mutex* Compile_lock = NULL;
aoqi@0	88	Monitor* MethodCompileQueue_lock = NULL;
aoqi@0	89	Monitor* CompileThread_lock = NULL;
aoqi@0	90	Mutex* CompileTaskAlloc_lock = NULL;
aoqi@0	91	Mutex* CompileStatistics_lock = NULL;
aoqi@0	92	Mutex* MultiArray_lock = NULL;
aoqi@0	93	Monitor* Terminator_lock = NULL;
aoqi@0	94	Monitor* BeforeExit_lock = NULL;
aoqi@0	95	Monitor* Notify_lock = NULL;
aoqi@0	96	Monitor* Interrupt_lock = NULL;
aoqi@0	97	Monitor* ProfileVM_lock = NULL;
aoqi@0	98	Mutex* ProfilePrint_lock = NULL;
aoqi@0	99	Mutex* ExceptionCache_lock = NULL;
aoqi@0	100	Monitor* ObjAllocPost_lock = NULL;
aoqi@0	101	Mutex* OsrList_lock = NULL;
aoqi@0	102	#ifndef PRODUCT
aoqi@0	103	Mutex* FullGCALot_lock = NULL;
aoqi@0	104	#endif
aoqi@0	105
aoqi@0	106	Mutex* Debug1_lock = NULL;
aoqi@0	107	Mutex* Debug2_lock = NULL;
aoqi@0	108	Mutex* Debug3_lock = NULL;
aoqi@0	109
aoqi@0	110	Mutex* tty_lock = NULL;
aoqi@0	111
aoqi@0	112	Mutex* RawMonitor_lock = NULL;
aoqi@0	113	Mutex* PerfDataMemAlloc_lock = NULL;
aoqi@0	114	Mutex* PerfDataManager_lock = NULL;
aoqi@0	115	Mutex* OopMapCacheAlloc_lock = NULL;
aoqi@0	116
aoqi@0	117	Mutex* FreeList_lock = NULL;
aoqi@0	118	Monitor* SecondaryFreeList_lock = NULL;
aoqi@0	119	Mutex* OldSets_lock = NULL;
aoqi@0	120	Monitor* RootRegionScan_lock = NULL;
aoqi@0	121	Mutex* MMUTracker_lock = NULL;
aoqi@0	122	Mutex* HotCardCache_lock = NULL;
aoqi@0	123
aoqi@0	124	Monitor* GCTaskManager_lock = NULL;
aoqi@0	125
aoqi@0	126	Mutex* Management_lock = NULL;
aoqi@0	127	Monitor* Service_lock = NULL;
aoqi@0	128	Monitor* PeriodicTask_lock = NULL;
aoqi@0	129
aoqi@0	130	#ifdef INCLUDE_TRACE
aoqi@0	131	Mutex* JfrStacktrace_lock = NULL;
aoqi@0	132	Monitor* JfrMsg_lock = NULL;
aoqi@0	133	Mutex* JfrBuffer_lock = NULL;
aoqi@0	134	Mutex* JfrStream_lock = NULL;
aoqi@0	135	Mutex* JfrThreadGroups_lock = NULL;
aoqi@0	136	#endif
aoqi@0	137
aoqi@0	138	#define MAX_NUM_MUTEX 128
aoqi@0	139	static Monitor * _mutex_array[MAX_NUM_MUTEX];
aoqi@0	140	static int _num_mutex;
aoqi@0	141
aoqi@0	142	#ifdef ASSERT
aoqi@0	143	void assert_locked_or_safepoint(const Monitor * lock) {
aoqi@0	144	// check if this thread owns the lock (common case)
aoqi@0	145	if (IgnoreLockingAssertions) return;
aoqi@0	146	assert(lock != NULL, "Need non-NULL lock");
aoqi@0	147	if (lock->owned_by_self()) return;
aoqi@0	148	if (SafepointSynchronize::is_at_safepoint()) return;
aoqi@0	149	if (!Universe::is_fully_initialized()) return;
aoqi@0	150	// see if invoker of VM operation owns it
aoqi@0	151	VM_Operation* op = VMThread::vm_operation();
aoqi@0	152	if (op != NULL && op->calling_thread() == lock->owner()) return;
aoqi@0	153	fatal(err_msg("must own lock %s", lock->name()));
aoqi@0	154	}
aoqi@0	155
aoqi@0	156	// a stronger assertion than the above
aoqi@0	157	void assert_lock_strong(const Monitor * lock) {
aoqi@0	158	if (IgnoreLockingAssertions) return;
aoqi@0	159	assert(lock != NULL, "Need non-NULL lock");
aoqi@0	160	if (lock->owned_by_self()) return;
aoqi@0	161	fatal(err_msg("must own lock %s", lock->name()));
aoqi@0	162	}
aoqi@0	163	#endif
aoqi@0	164
aoqi@0	165	#define def(var, type, pri, vm_block) { \
aoqi@0	166	var = new type(Mutex::pri, #var, vm_block); \
aoqi@0	167	assert(_num_mutex < MAX_NUM_MUTEX, \
aoqi@0	168	"increase MAX_NUM_MUTEX"); \
aoqi@0	169	_mutex_array[_num_mutex++] = var; \
aoqi@0	170	}
aoqi@0	171
aoqi@0	172	void mutex_init() {
aoqi@0	173	def(tty_lock , Mutex , event, true ); // allow to lock in VM
aoqi@0	174
aoqi@0	175	def(CGC_lock , Monitor, special, true ); // coordinate between fore- and background GC
pliden@6906	176	def(STS_lock , Monitor, leaf, true );
aoqi@0	177	if (UseConcMarkSweepGC) {
aoqi@0	178	def(iCMS_lock , Monitor, special, true ); // CMS incremental mode start/stop notification
aoqi@0	179	}
aoqi@0	180	if (UseConcMarkSweepGC || UseG1GC) {
aoqi@0	181	def(FullGCCount_lock , Monitor, leaf, true ); // in support of ExplicitGCInvokesConcurrent
aoqi@0	182	}
aoqi@0	183	if (UseG1GC) {
aoqi@0	184	def(CMark_lock , Monitor, nonleaf, true ); // coordinate concurrent mark thread
aoqi@0	185	def(CMRegionStack_lock , Mutex, leaf, true );
aoqi@0	186	def(SATB_Q_FL_lock , Mutex , special, true );
aoqi@0	187	def(SATB_Q_CBL_mon , Monitor, nonleaf, true );
aoqi@0	188	def(Shared_SATB_Q_lock , Mutex, nonleaf, true );
aoqi@0	189
aoqi@0	190	def(DirtyCardQ_FL_lock , Mutex , special, true );
aoqi@0	191	def(DirtyCardQ_CBL_mon , Monitor, nonleaf, true );
aoqi@0	192	def(Shared_DirtyCardQ_lock , Mutex, nonleaf, true );
aoqi@0	193
aoqi@0	194	def(FreeList_lock , Mutex, leaf , true );
aoqi@0	195	def(SecondaryFreeList_lock , Monitor, leaf , true );
aoqi@0	196	def(OldSets_lock , Mutex , leaf , true );
aoqi@0	197	def(RootRegionScan_lock , Monitor, leaf , true );
aoqi@0	198	def(MMUTracker_lock , Mutex , leaf , true );
aoqi@0	199	def(HotCardCache_lock , Mutex , special , true );
aoqi@0	200	def(EvacFailureStack_lock , Mutex , nonleaf , true );
aoqi@0	201
aoqi@0	202	def(StringDedupQueue_lock , Monitor, leaf, true );
aoqi@0	203	def(StringDedupTable_lock , Mutex , leaf, true );
aoqi@0	204	}
aoqi@0	205	def(ParGCRareEvent_lock , Mutex , leaf , true );
aoqi@0	206	def(DerivedPointerTableGC_lock , Mutex, leaf, true );
aoqi@0	207	def(CodeCache_lock , Mutex , special, true );
aoqi@0	208	def(Interrupt_lock , Monitor, special, true ); // used for interrupt processing
aoqi@0	209	def(RawMonitor_lock , Mutex, special, true );
aoqi@0	210	def(OopMapCacheAlloc_lock , Mutex, leaf, true ); // used for oop_map_cache allocation.
aoqi@0	211
aoqi@0	212	def(Patching_lock , Mutex , special, true ); // used for safepointing and code patching.
aoqi@0	213	def(ObjAllocPost_lock , Monitor, special, false);
aoqi@0	214	def(Service_lock , Monitor, special, true ); // used for service thread operations
aoqi@0	215	def(JmethodIdCreation_lock , Mutex , leaf, true ); // used for creating jmethodIDs.
aoqi@0	216
aoqi@0	217	def(SystemDictionary_lock , Monitor, leaf, true ); // lookups done by VM thread
aoqi@0	218	def(PackageTable_lock , Mutex , leaf, false);
aoqi@0	219	def(InlineCacheBuffer_lock , Mutex , leaf, true );
aoqi@0	220	def(VMStatistic_lock , Mutex , leaf, false);
aoqi@0	221	def(ExpandHeap_lock , Mutex , leaf, true ); // Used during compilation by VM thread
aoqi@0	222	def(JNIHandleBlockFreeList_lock , Mutex , leaf, true ); // handles are used by VM thread
aoqi@0	223	def(SignatureHandlerLibrary_lock , Mutex , leaf, false);
aoqi@0	224	def(SymbolTable_lock , Mutex , leaf+2, true );
aoqi@0	225	def(StringTable_lock , Mutex , leaf, true );
aoqi@0	226	def(ProfilePrint_lock , Mutex , leaf, false); // serial profile printing
aoqi@0	227	def(ExceptionCache_lock , Mutex , leaf, false); // serial profile printing
aoqi@0	228	def(OsrList_lock , Mutex , leaf, true );
aoqi@0	229	def(Debug1_lock , Mutex , leaf, true );
aoqi@0	230	#ifndef PRODUCT
aoqi@0	231	def(FullGCALot_lock , Mutex , leaf, false); // a lock to make FullGCALot MT safe
aoqi@0	232	#endif
aoqi@0	233	def(BeforeExit_lock , Monitor, leaf, true );
aoqi@0	234	def(PerfDataMemAlloc_lock , Mutex , leaf, true ); // used for allocating PerfData memory for performance data
aoqi@0	235	def(PerfDataManager_lock , Mutex , leaf, true ); // used for synchronized access to PerfDataManager resources
aoqi@0	236
aoqi@0	237	// CMS_modUnionTable_lock leaf
aoqi@0	238	// CMS_bitMap_lock leaf + 1
aoqi@0	239	// CMS_freeList_lock leaf + 2
aoqi@0	240
aoqi@0	241	def(Safepoint_lock , Monitor, safepoint, true ); // locks SnippetCache_lock/Threads_lock
aoqi@0	242
aoqi@0	243	def(Threads_lock , Monitor, barrier, true );
aoqi@0	244
aoqi@0	245	def(VMOperationQueue_lock , Monitor, nonleaf, true ); // VM_thread allowed to block on these
aoqi@0	246	def(VMOperationRequest_lock , Monitor, nonleaf, true );
aoqi@0	247	def(RetData_lock , Mutex , nonleaf, false);
aoqi@0	248	def(Terminator_lock , Monitor, nonleaf, true );
aoqi@0	249	def(VtableStubs_lock , Mutex , nonleaf, true );
aoqi@0	250	def(Notify_lock , Monitor, nonleaf, true );
aoqi@0	251	def(JNIGlobalHandle_lock , Mutex , nonleaf, true ); // locks JNIHandleBlockFreeList_lock
aoqi@0	252	def(JNICritical_lock , Monitor, nonleaf, true ); // used for JNI critical regions
aoqi@0	253	def(AdapterHandlerLibrary_lock , Mutex , nonleaf, true);
aoqi@0	254	if (UseConcMarkSweepGC) {
aoqi@0	255	def(SLT_lock , Monitor, nonleaf, false );
aoqi@0	256	// used in CMS GC for locking PLL lock
aoqi@0	257	}
aoqi@0	258	def(Heap_lock , Monitor, nonleaf+1, false);
aoqi@0	259	def(JfieldIdCreation_lock , Mutex , nonleaf+1, true ); // jfieldID, Used in VM_Operation
aoqi@0	260	def(MemberNameTable_lock , Mutex , nonleaf+1, false); // Used to protect MemberNameTable
aoqi@0	261
aoqi@0	262	def(CompiledIC_lock , Mutex , nonleaf+2, false); // locks VtableStubs_lock, InlineCacheBuffer_lock
aoqi@0	263	def(CompileTaskAlloc_lock , Mutex , nonleaf+2, true );
aoqi@0	264	def(CompileStatistics_lock , Mutex , nonleaf+2, false);
aoqi@0	265	def(MultiArray_lock , Mutex , nonleaf+2, false); // locks SymbolTable_lock
aoqi@0	266
aoqi@0	267	def(JvmtiThreadState_lock , Mutex , nonleaf+2, false); // Used by JvmtiThreadState/JvmtiEventController
aoqi@0	268	def(JvmtiPendingEvent_lock , Monitor, nonleaf, false); // Used by JvmtiCodeBlobEvents
aoqi@0	269	def(Management_lock , Mutex , nonleaf+2, false); // used for JVM management
aoqi@0	270
aoqi@0	271	def(Compile_lock , Mutex , nonleaf+3, true );
aoqi@0	272	def(MethodData_lock , Mutex , nonleaf+3, false);
aoqi@0	273
aoqi@0	274	def(MethodCompileQueue_lock , Monitor, nonleaf+4, true );
aoqi@0	275	def(Debug2_lock , Mutex , nonleaf+4, true );
aoqi@0	276	def(Debug3_lock , Mutex , nonleaf+4, true );
aoqi@0	277	def(ProfileVM_lock , Monitor, special, false); // used for profiling of the VMThread
aoqi@0	278	def(CompileThread_lock , Monitor, nonleaf+5, false );
aoqi@0	279	def(PeriodicTask_lock , Monitor, nonleaf+5, true);
aoqi@0	280
aoqi@0	281	#ifdef INCLUDE_TRACE
aoqi@0	282	def(JfrMsg_lock , Monitor, leaf, true);
aoqi@0	283	def(JfrBuffer_lock , Mutex, nonleaf+1, true);
aoqi@0	284	def(JfrThreadGroups_lock , Mutex, nonleaf+1, true);
aoqi@0	285	def(JfrStream_lock , Mutex, nonleaf+2, true);
aoqi@0	286	def(JfrStacktrace_lock , Mutex, special, true );
aoqi@0	287	#endif
aoqi@0	288
aoqi@0	289	}
aoqi@0	290
aoqi@0	291	GCMutexLocker::GCMutexLocker(Monitor * mutex) {
aoqi@0	292	if (SafepointSynchronize::is_at_safepoint()) {
aoqi@0	293	_locked = false;
aoqi@0	294	} else {
aoqi@0	295	_mutex = mutex;
aoqi@0	296	_locked = true;
aoqi@0	297	_mutex->lock();
aoqi@0	298	}
aoqi@0	299	}
aoqi@0	300
aoqi@0	301	// Print all mutexes/monitors that are currently owned by a thread; called
aoqi@0	302	// by fatal error handler.
aoqi@0	303	void print_owned_locks_on_error(outputStream* st) {
aoqi@0	304	st->print("VM Mutex/Monitor currently owned by a thread: ");
aoqi@0	305	bool none = true;
aoqi@0	306	for (int i = 0; i < _num_mutex; i++) {
aoqi@0	307	// see if it has an owner
aoqi@0	308	if (_mutex_array[i]->owner() != NULL) {
aoqi@0	309	if (none) {
aoqi@0	310	// print format used by Mutex::print_on_error()
aoqi@0	311	st->print_cr(" ([mutex/lock_event])");
aoqi@0	312	none = false;
aoqi@0	313	}
aoqi@0	314	_mutex_array[i]->print_on_error(st);
aoqi@0	315	st->cr();
aoqi@0	316	}
aoqi@0	317	}
aoqi@0	318	if (none) st->print_cr("None");
aoqi@0	319	}