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src/share/vm/runtime/mutexLocker.cpp@d1605aabd0a1 (annotated)

src/share/vm/runtime/mutexLocker.cpp

Wed, 02 Jul 2008 12:55:16 -0700

author

xdono

date

Wed, 02 Jul 2008 12:55:16 -0700

changeset 631

d1605aabd0a1

parent 490

2a8eb116ebbe

child 791

1ee8caae33af

permissions

-rw-r--r--

6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

duke@435	1	/*
xdono@631	2	* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	#include "incls/_precompiled.incl"
duke@435	26	#include "incls/_mutexLocker.cpp.incl"
duke@435	27
duke@435	28	// Mutexes used in the VM (see comment in mutexLocker.hpp):
duke@435	29	//
duke@435	30	// Note that the following pointers are effectively final -- after having been
duke@435	31	// set at JVM startup-time, they should never be subsequently mutated.
duke@435	32	// Instead of using pointers to malloc()ed monitors and mutexes we should consider
duke@435	33	// eliminating the indirection and using instances instead.
duke@435	34	// Consider using GCC's __read_mostly.
duke@435	35
duke@435	36	Mutex* Patching_lock = NULL;
duke@435	37	Monitor* SystemDictionary_lock = NULL;
duke@435	38	Mutex* PackageTable_lock = NULL;
duke@435	39	Mutex* CompiledIC_lock = NULL;
duke@435	40	Mutex* InlineCacheBuffer_lock = NULL;
duke@435	41	Mutex* VMStatistic_lock = NULL;
duke@435	42	Mutex* JNIGlobalHandle_lock = NULL;
duke@435	43	Mutex* JNIHandleBlockFreeList_lock = NULL;
duke@435	44	Mutex* JNICachedItableIndex_lock = NULL;
duke@435	45	Mutex* JmethodIdCreation_lock = NULL;
duke@435	46	Mutex* JfieldIdCreation_lock = NULL;
duke@435	47	Monitor* JNICritical_lock = NULL;
duke@435	48	Mutex* JvmtiThreadState_lock = NULL;
duke@435	49	Monitor* JvmtiPendingEvent_lock = NULL;
duke@435	50	Mutex* Heap_lock = NULL;
duke@435	51	Mutex* ExpandHeap_lock = NULL;
duke@435	52	Mutex* AdapterHandlerLibrary_lock = NULL;
duke@435	53	Mutex* SignatureHandlerLibrary_lock = NULL;
duke@435	54	Mutex* VtableStubs_lock = NULL;
duke@435	55	Mutex* SymbolTable_lock = NULL;
duke@435	56	Mutex* StringTable_lock = NULL;
duke@435	57	Mutex* CodeCache_lock = NULL;
duke@435	58	Mutex* MethodData_lock = NULL;
duke@435	59	Mutex* RetData_lock = NULL;
duke@435	60	Monitor* VMOperationQueue_lock = NULL;
duke@435	61	Monitor* VMOperationRequest_lock = NULL;
duke@435	62	Monitor* Safepoint_lock = NULL;
duke@435	63	Monitor* SerializePage_lock = NULL;
duke@435	64	Monitor* Threads_lock = NULL;
duke@435	65	Monitor* CGC_lock = NULL;
duke@435	66	Mutex* STS_init_lock = NULL;
duke@435	67	Monitor* SLT_lock = NULL;
duke@435	68	Monitor* iCMS_lock = NULL;
duke@435	69	Monitor* FullGCCount_lock = NULL;
duke@435	70	Mutex* ParGCRareEvent_lock = NULL;
duke@435	71	Mutex* DerivedPointerTableGC_lock = NULL;
duke@435	72	Mutex* Compile_lock = NULL;
duke@435	73	Monitor* MethodCompileQueue_lock = NULL;
duke@435	74	#ifdef TIERED
duke@435	75	Monitor* C1_lock = NULL;
duke@435	76	#endif // TIERED
duke@435	77	Monitor* CompileThread_lock = NULL;
duke@435	78	Mutex* CompileTaskAlloc_lock = NULL;
duke@435	79	Mutex* CompileStatistics_lock = NULL;
duke@435	80	Mutex* MultiArray_lock = NULL;
duke@435	81	Monitor* Terminator_lock = NULL;
duke@435	82	Monitor* BeforeExit_lock = NULL;
duke@435	83	Monitor* Notify_lock = NULL;
duke@435	84	Monitor* Interrupt_lock = NULL;
duke@435	85	Monitor* ProfileVM_lock = NULL;
duke@435	86	Mutex* ProfilePrint_lock = NULL;
duke@435	87	Mutex* ExceptionCache_lock = NULL;
duke@435	88	Monitor* ObjAllocPost_lock = NULL;
duke@435	89	Mutex* OsrList_lock = NULL;
duke@435	90	#ifndef PRODUCT
duke@435	91	Mutex* FullGCALot_lock = NULL;
duke@435	92	#endif
duke@435	93
duke@435	94	Mutex* Debug1_lock = NULL;
duke@435	95	Mutex* Debug2_lock = NULL;
duke@435	96	Mutex* Debug3_lock = NULL;
duke@435	97
duke@435	98	Mutex* tty_lock = NULL;
duke@435	99
duke@435	100	Mutex* RawMonitor_lock = NULL;
duke@435	101	Mutex* PerfDataMemAlloc_lock = NULL;
duke@435	102	Mutex* PerfDataManager_lock = NULL;
duke@435	103	Mutex* OopMapCacheAlloc_lock = NULL;
duke@435	104
duke@435	105	Monitor* GCTaskManager_lock = NULL;
duke@435	106
duke@435	107	Mutex* Management_lock = NULL;
duke@435	108	Monitor* LowMemory_lock = NULL;
duke@435	109
duke@435	110	#define MAX_NUM_MUTEX 128
duke@435	111	static Monitor * _mutex_array[MAX_NUM_MUTEX];
duke@435	112	static int _num_mutex;
duke@435	113
duke@435	114	#ifdef ASSERT
duke@435	115	void assert_locked_or_safepoint(const Monitor * lock) {
duke@435	116	// check if this thread owns the lock (common case)
duke@435	117	if (IgnoreLockingAssertions) return;
duke@435	118	assert(lock != NULL, "Need non-NULL lock");
duke@435	119	if (lock->owned_by_self()) return;
duke@435	120	if (SafepointSynchronize::is_at_safepoint()) return;
duke@435	121	if (!Universe::is_fully_initialized()) return;
duke@435	122	// see if invoker of VM operation owns it
duke@435	123	VM_Operation* op = VMThread::vm_operation();
duke@435	124	if (op != NULL && op->calling_thread() == lock->owner()) return;
duke@435	125	fatal1("must own lock %s", lock->name());
duke@435	126	}
duke@435	127
duke@435	128	// a stronger assertion than the above
duke@435	129	void assert_lock_strong(const Monitor * lock) {
duke@435	130	if (IgnoreLockingAssertions) return;
duke@435	131	assert(lock != NULL, "Need non-NULL lock");
duke@435	132	if (lock->owned_by_self()) return;
duke@435	133	fatal1("must own lock %s", lock->name());
duke@435	134	}
duke@435	135	#endif
duke@435	136
duke@435	137	#define def(var, type, pri, vm_block) { \
duke@435	138	var = new type(Mutex::pri, #var, vm_block); \
duke@435	139	assert(_num_mutex < MAX_NUM_MUTEX, \
duke@435	140	"increase MAX_NUM_MUTEX"); \
duke@435	141	_mutex_array[_num_mutex++] = var; \
duke@435	142	}
duke@435	143
duke@435	144	void mutex_init() {
duke@435	145	def(tty_lock , Mutex , event, true ); // allow to lock in VM
duke@435	146
duke@435	147	def(CGC_lock , Monitor, special, true ); // coordinate between fore- and background GC
duke@435	148	def(STS_init_lock , Mutex, leaf, true );
duke@435	149	if (UseConcMarkSweepGC) {
duke@435	150	def(iCMS_lock , Monitor, special, true ); // CMS incremental mode start/stop notification
duke@435	151	def(FullGCCount_lock , Monitor, leaf, true ); // in support of ExplicitGCInvokesConcurrent
duke@435	152	}
duke@435	153	def(ParGCRareEvent_lock , Mutex , leaf , true );
duke@435	154	def(DerivedPointerTableGC_lock , Mutex, leaf, true );
duke@435	155	def(CodeCache_lock , Mutex , special, true );
duke@435	156	def(Interrupt_lock , Monitor, special, true ); // used for interrupt processing
duke@435	157	def(RawMonitor_lock , Mutex, special, true );
duke@435	158	def(OopMapCacheAlloc_lock , Mutex, leaf, true ); // used for oop_map_cache allocation.
duke@435	159
duke@435	160	def(Patching_lock , Mutex , special, true ); // used for safepointing and code patching.
duke@435	161	def(ObjAllocPost_lock , Monitor, special, false);
duke@435	162	def(LowMemory_lock , Monitor, special, true ); // used for low memory detection
duke@435	163	def(JmethodIdCreation_lock , Mutex , leaf, true ); // used for creating jmethodIDs.
duke@435	164
duke@435	165	def(SystemDictionary_lock , Monitor, leaf, true ); // lookups done by VM thread
duke@435	166	def(PackageTable_lock , Mutex , leaf, false);
duke@435	167	def(InlineCacheBuffer_lock , Mutex , leaf, true );
duke@435	168	def(VMStatistic_lock , Mutex , leaf, false);
duke@435	169	def(ExpandHeap_lock , Mutex , leaf, true ); // Used during compilation by VM thread
duke@435	170	def(JNIHandleBlockFreeList_lock , Mutex , leaf, true ); // handles are used by VM thread
duke@435	171	def(SignatureHandlerLibrary_lock , Mutex , leaf, false);
duke@435	172	def(SymbolTable_lock , Mutex , leaf, true );
duke@435	173	def(StringTable_lock , Mutex , leaf, true );
duke@435	174	def(ProfilePrint_lock , Mutex , leaf, false); // serial profile printing
duke@435	175	def(ExceptionCache_lock , Mutex , leaf, false); // serial profile printing
duke@435	176	def(OsrList_lock , Mutex , leaf, true );
duke@435	177	def(Debug1_lock , Mutex , leaf, true );
duke@435	178	#ifndef PRODUCT
duke@435	179	def(FullGCALot_lock , Mutex , leaf, false); // a lock to make FullGCALot MT safe
duke@435	180	#endif
duke@435	181	def(BeforeExit_lock , Monitor, leaf, true );
duke@435	182	def(PerfDataMemAlloc_lock , Mutex , leaf, true ); // used for allocating PerfData memory for performance data
duke@435	183	def(PerfDataManager_lock , Mutex , leaf, true ); // used for synchronized access to PerfDataManager resources
duke@435	184
duke@435	185	// CMS_modUnionTable_lock leaf
duke@435	186	// CMS_bitMap_lock leaf + 1
duke@435	187	// CMS_freeList_lock leaf + 2
duke@435	188
duke@435	189	def(Safepoint_lock , Monitor, safepoint, true ); // locks SnippetCache_lock/Threads_lock
duke@435	190
duke@435	191	def(Threads_lock , Monitor, barrier, true );
duke@435	192
duke@435	193	def(VMOperationQueue_lock , Monitor, nonleaf, true ); // VM_thread allowed to block on these
duke@435	194	def(VMOperationRequest_lock , Monitor, nonleaf, true );
duke@435	195	def(RetData_lock , Mutex , nonleaf, false);
duke@435	196	def(Terminator_lock , Monitor, nonleaf, true );
duke@435	197	def(VtableStubs_lock , Mutex , nonleaf, true );
duke@435	198	def(Notify_lock , Monitor, nonleaf, true );
duke@435	199	def(JNIGlobalHandle_lock , Mutex , nonleaf, true ); // locks JNIHandleBlockFreeList_lock
duke@435	200	def(JNICritical_lock , Monitor, nonleaf, true ); // used for JNI critical regions
duke@435	201	def(AdapterHandlerLibrary_lock , Mutex , nonleaf, true);
duke@435	202	if (UseConcMarkSweepGC) {
duke@435	203	def(SLT_lock , Monitor, nonleaf, false );
duke@435	204	// used in CMS GC for locking PLL lock
duke@435	205	}
duke@435	206	def(Heap_lock , Mutex , nonleaf+1, false);
duke@435	207	def(JfieldIdCreation_lock , Mutex , nonleaf+1, true ); // jfieldID, Used in VM_Operation
duke@435	208	def(JNICachedItableIndex_lock , Mutex , nonleaf+1, false); // Used to cache an itable index during JNI invoke
duke@435	209
duke@435	210	def(CompiledIC_lock , Mutex , nonleaf+2, false); // locks VtableStubs_lock, InlineCacheBuffer_lock
duke@435	211	def(CompileTaskAlloc_lock , Mutex , nonleaf+2, true );
duke@435	212	def(CompileStatistics_lock , Mutex , nonleaf+2, false);
duke@435	213	def(MultiArray_lock , Mutex , nonleaf+2, false); // locks SymbolTable_lock
duke@435	214
duke@435	215	def(JvmtiThreadState_lock , Mutex , nonleaf+2, false); // Used by JvmtiThreadState/JvmtiEventController
duke@435	216	def(JvmtiPendingEvent_lock , Monitor, nonleaf, false); // Used by JvmtiCodeBlobEvents
duke@435	217	def(Management_lock , Mutex , nonleaf+2, false); // used for JVM management
duke@435	218
duke@435	219	def(Compile_lock , Mutex , nonleaf+3, true );
duke@435	220	def(MethodData_lock , Mutex , nonleaf+3, false);
duke@435	221
duke@435	222	def(MethodCompileQueue_lock , Monitor, nonleaf+4, true );
duke@435	223	def(Debug2_lock , Mutex , nonleaf+4, true );
duke@435	224	def(Debug3_lock , Mutex , nonleaf+4, true );
duke@435	225	def(ProfileVM_lock , Monitor, nonleaf+4, false); // used for profiling of the VMThread
duke@435	226	def(CompileThread_lock , Monitor, nonleaf+5, false );
duke@435	227	#ifdef TIERED
duke@435	228	def(C1_lock , Monitor, nonleaf+5, false );
duke@435	229	#endif // TIERED
duke@435	230
duke@435	231
duke@435	232	}
duke@435	233
duke@435	234	GCMutexLocker::GCMutexLocker(Monitor * mutex) {
duke@435	235	if (SafepointSynchronize::is_at_safepoint()) {
duke@435	236	_locked = false;
duke@435	237	} else {
duke@435	238	_mutex = mutex;
duke@435	239	_locked = true;
duke@435	240	_mutex->lock();
duke@435	241	}
duke@435	242	}
duke@435	243
duke@435	244	// Print all mutexes/monitors that are currently owned by a thread; called
duke@435	245	// by fatal error handler.
duke@435	246	void print_owned_locks_on_error(outputStream* st) {
duke@435	247	st->print("VM Mutex/Monitor currently owned by a thread: ");
duke@435	248	bool none = true;
duke@435	249	for (int i = 0; i < _num_mutex; i++) {
duke@435	250	// see if it has an owner
duke@435	251	if (_mutex_array[i]->owner() != NULL) {
duke@435	252	if (none) {
duke@435	253	// print format used by Mutex::print_on_error()
duke@435	254	st->print_cr(" ([mutex/lock_event])");
duke@435	255	none = false;
duke@435	256	}
duke@435	257	_mutex_array[i]->print_on_error(st);
duke@435	258	st->cr();
duke@435	259	}
duke@435	260	}
duke@435	261	if (none) st->print_cr("None");
duke@435	262	}