mutexLocker.cpp revision 1410:f03d0a26bf83
1/* 2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25#include "incls/_precompiled.incl" 26#include "incls/_mutexLocker.cpp.incl" 27 28// Mutexes used in the VM (see comment in mutexLocker.hpp): 29// 30// Note that the following pointers are effectively final -- after having been 31// set at JVM startup-time, they should never be subsequently mutated. 32// Instead of using pointers to malloc()ed monitors and mutexes we should consider 33// eliminating the indirection and using instances instead. 34// Consider using GCC's __read_mostly. 35 36Mutex* Patching_lock = NULL; 37Monitor* SystemDictionary_lock = NULL; 38Mutex* PackageTable_lock = NULL; 39Mutex* CompiledIC_lock = NULL; 40Mutex* InlineCacheBuffer_lock = NULL; 41Mutex* VMStatistic_lock = NULL; 42Mutex* JNIGlobalHandle_lock = NULL; 43Mutex* JNIHandleBlockFreeList_lock = NULL; 44Mutex* JNICachedItableIndex_lock = NULL; 45Mutex* JmethodIdCreation_lock = NULL; 46Mutex* JfieldIdCreation_lock = NULL; 47Monitor* JNICritical_lock = NULL; 48Mutex* JvmtiThreadState_lock = NULL; 49Monitor* JvmtiPendingEvent_lock = NULL; 50Monitor* Heap_lock = NULL; 51Mutex* ExpandHeap_lock = NULL; 52Mutex* AdapterHandlerLibrary_lock = NULL; 53Mutex* SignatureHandlerLibrary_lock = NULL; 54Mutex* VtableStubs_lock = NULL; 55Mutex* SymbolTable_lock = NULL; 56Mutex* StringTable_lock = NULL; 57Mutex* CodeCache_lock = NULL; 58Mutex* MethodData_lock = NULL; 59Mutex* RetData_lock = NULL; 60Monitor* VMOperationQueue_lock = NULL; 61Monitor* VMOperationRequest_lock = NULL; 62Monitor* Safepoint_lock = NULL; 63Monitor* SerializePage_lock = NULL; 64Monitor* Threads_lock = NULL; 65Monitor* CGC_lock = NULL; 66Mutex* STS_init_lock = NULL; 67Monitor* SLT_lock = NULL; 68Monitor* iCMS_lock = NULL; 69Monitor* FullGCCount_lock = NULL; 70Monitor* CMark_lock = NULL; 71Monitor* ZF_mon = NULL; 72Monitor* Cleanup_mon = NULL; 73Mutex* CMRegionStack_lock = NULL; 74Mutex* SATB_Q_FL_lock = NULL; 75Monitor* SATB_Q_CBL_mon = NULL; 76Mutex* Shared_SATB_Q_lock = NULL; 77Mutex* DirtyCardQ_FL_lock = NULL; 78Monitor* DirtyCardQ_CBL_mon = NULL; 79Mutex* Shared_DirtyCardQ_lock = NULL; 80Mutex* ParGCRareEvent_lock = NULL; 81Mutex* EvacFailureStack_lock = NULL; 82Mutex* DerivedPointerTableGC_lock = NULL; 83Mutex* Compile_lock = NULL; 84Monitor* MethodCompileQueue_lock = NULL; 85#ifdef TIERED 86Monitor* C1_lock = NULL; 87#endif // TIERED 88Monitor* CompileThread_lock = NULL; 89Mutex* CompileTaskAlloc_lock = NULL; 90Mutex* CompileStatistics_lock = NULL; 91Mutex* MultiArray_lock = NULL; 92Monitor* Terminator_lock = NULL; 93Monitor* BeforeExit_lock = NULL; 94Monitor* Notify_lock = NULL; 95Monitor* Interrupt_lock = NULL; 96Monitor* ProfileVM_lock = NULL; 97Mutex* ProfilePrint_lock = NULL; 98Mutex* ExceptionCache_lock = NULL; 99Monitor* ObjAllocPost_lock = NULL; 100Mutex* OsrList_lock = NULL; 101#ifndef PRODUCT 102Mutex* FullGCALot_lock = NULL; 103#endif 104 105Mutex* Debug1_lock = NULL; 106Mutex* Debug2_lock = NULL; 107Mutex* Debug3_lock = NULL; 108 109Mutex* tty_lock = NULL; 110 111Mutex* RawMonitor_lock = NULL; 112Mutex* PerfDataMemAlloc_lock = NULL; 113Mutex* PerfDataManager_lock = NULL; 114Mutex* OopMapCacheAlloc_lock = NULL; 115 116Mutex* MMUTracker_lock = NULL; 117Mutex* HotCardCache_lock = NULL; 118 119Monitor* GCTaskManager_lock = NULL; 120 121Mutex* Management_lock = NULL; 122Monitor* LowMemory_lock = NULL; 123 124#define MAX_NUM_MUTEX 128 125static Monitor * _mutex_array[MAX_NUM_MUTEX]; 126static int _num_mutex; 127 128#ifdef ASSERT 129void assert_locked_or_safepoint(const Monitor * lock) { 130 // check if this thread owns the lock (common case) 131 if (IgnoreLockingAssertions) return; 132 assert(lock != NULL, "Need non-NULL lock"); 133 if (lock->owned_by_self()) return; 134 if (SafepointSynchronize::is_at_safepoint()) return; 135 if (!Universe::is_fully_initialized()) return; 136 // see if invoker of VM operation owns it 137 VM_Operation* op = VMThread::vm_operation(); 138 if (op != NULL && op->calling_thread() == lock->owner()) return; 139 fatal(err_msg("must own lock %s", lock->name())); 140} 141 142// a stronger assertion than the above 143void assert_lock_strong(const Monitor * lock) { 144 if (IgnoreLockingAssertions) return; 145 assert(lock != NULL, "Need non-NULL lock"); 146 if (lock->owned_by_self()) return; 147 fatal(err_msg("must own lock %s", lock->name())); 148} 149#endif 150 151#define def(var, type, pri, vm_block) { \ 152 var = new type(Mutex::pri, #var, vm_block); \ 153 assert(_num_mutex < MAX_NUM_MUTEX, \ 154 "increase MAX_NUM_MUTEX"); \ 155 _mutex_array[_num_mutex++] = var; \ 156} 157 158void mutex_init() { 159 def(tty_lock , Mutex , event, true ); // allow to lock in VM 160 161 def(CGC_lock , Monitor, special, true ); // coordinate between fore- and background GC 162 def(STS_init_lock , Mutex, leaf, true ); 163 if (UseConcMarkSweepGC) { 164 def(iCMS_lock , Monitor, special, true ); // CMS incremental mode start/stop notification 165 def(FullGCCount_lock , Monitor, leaf, true ); // in support of ExplicitGCInvokesConcurrent 166 } 167 if (UseG1GC) { 168 def(CMark_lock , Monitor, nonleaf, true ); // coordinate concurrent mark thread 169 def(ZF_mon , Monitor, leaf, true ); 170 def(Cleanup_mon , Monitor, nonleaf, true ); 171 def(CMRegionStack_lock , Mutex, leaf, true ); 172 def(SATB_Q_FL_lock , Mutex , special, true ); 173 def(SATB_Q_CBL_mon , Monitor, nonleaf, true ); 174 def(Shared_SATB_Q_lock , Mutex, nonleaf, true ); 175 176 def(DirtyCardQ_FL_lock , Mutex , special, true ); 177 def(DirtyCardQ_CBL_mon , Monitor, nonleaf, true ); 178 def(Shared_DirtyCardQ_lock , Mutex, nonleaf, true ); 179 180 def(MMUTracker_lock , Mutex , leaf , true ); 181 def(HotCardCache_lock , Mutex , special , true ); 182 def(EvacFailureStack_lock , Mutex , nonleaf , true ); 183 } 184 def(ParGCRareEvent_lock , Mutex , leaf , true ); 185 def(DerivedPointerTableGC_lock , Mutex, leaf, true ); 186 def(CodeCache_lock , Mutex , special, true ); 187 def(Interrupt_lock , Monitor, special, true ); // used for interrupt processing 188 def(RawMonitor_lock , Mutex, special, true ); 189 def(OopMapCacheAlloc_lock , Mutex, leaf, true ); // used for oop_map_cache allocation. 190 191 def(Patching_lock , Mutex , special, true ); // used for safepointing and code patching. 192 def(ObjAllocPost_lock , Monitor, special, false); 193 def(LowMemory_lock , Monitor, special, true ); // used for low memory detection 194 def(JmethodIdCreation_lock , Mutex , leaf, true ); // used for creating jmethodIDs. 195 196 def(SystemDictionary_lock , Monitor, leaf, true ); // lookups done by VM thread 197 def(PackageTable_lock , Mutex , leaf, false); 198 def(InlineCacheBuffer_lock , Mutex , leaf, true ); 199 def(VMStatistic_lock , Mutex , leaf, false); 200 def(ExpandHeap_lock , Mutex , leaf, true ); // Used during compilation by VM thread 201 def(JNIHandleBlockFreeList_lock , Mutex , leaf, true ); // handles are used by VM thread 202 def(SignatureHandlerLibrary_lock , Mutex , leaf, false); 203 def(SymbolTable_lock , Mutex , leaf, true ); 204 def(StringTable_lock , Mutex , leaf, true ); 205 def(ProfilePrint_lock , Mutex , leaf, false); // serial profile printing 206 def(ExceptionCache_lock , Mutex , leaf, false); // serial profile printing 207 def(OsrList_lock , Mutex , leaf, true ); 208 def(Debug1_lock , Mutex , leaf, true ); 209#ifndef PRODUCT 210 def(FullGCALot_lock , Mutex , leaf, false); // a lock to make FullGCALot MT safe 211#endif 212 def(BeforeExit_lock , Monitor, leaf, true ); 213 def(PerfDataMemAlloc_lock , Mutex , leaf, true ); // used for allocating PerfData memory for performance data 214 def(PerfDataManager_lock , Mutex , leaf, true ); // used for synchronized access to PerfDataManager resources 215 216 // CMS_modUnionTable_lock leaf 217 // CMS_bitMap_lock leaf + 1 218 // CMS_freeList_lock leaf + 2 219 220 def(Safepoint_lock , Monitor, safepoint, true ); // locks SnippetCache_lock/Threads_lock 221 222 def(Threads_lock , Monitor, barrier, true ); 223 224 def(VMOperationQueue_lock , Monitor, nonleaf, true ); // VM_thread allowed to block on these 225 def(VMOperationRequest_lock , Monitor, nonleaf, true ); 226 def(RetData_lock , Mutex , nonleaf, false); 227 def(Terminator_lock , Monitor, nonleaf, true ); 228 def(VtableStubs_lock , Mutex , nonleaf, true ); 229 def(Notify_lock , Monitor, nonleaf, true ); 230 def(JNIGlobalHandle_lock , Mutex , nonleaf, true ); // locks JNIHandleBlockFreeList_lock 231 def(JNICritical_lock , Monitor, nonleaf, true ); // used for JNI critical regions 232 def(AdapterHandlerLibrary_lock , Mutex , nonleaf, true); 233 if (UseConcMarkSweepGC) { 234 def(SLT_lock , Monitor, nonleaf, false ); 235 // used in CMS GC for locking PLL lock 236 } 237 def(Heap_lock , Monitor, nonleaf+1, false); 238 def(JfieldIdCreation_lock , Mutex , nonleaf+1, true ); // jfieldID, Used in VM_Operation 239 def(JNICachedItableIndex_lock , Mutex , nonleaf+1, false); // Used to cache an itable index during JNI invoke 240 241 def(CompiledIC_lock , Mutex , nonleaf+2, false); // locks VtableStubs_lock, InlineCacheBuffer_lock 242 def(CompileTaskAlloc_lock , Mutex , nonleaf+2, true ); 243 def(CompileStatistics_lock , Mutex , nonleaf+2, false); 244 def(MultiArray_lock , Mutex , nonleaf+2, false); // locks SymbolTable_lock 245 246 def(JvmtiThreadState_lock , Mutex , nonleaf+2, false); // Used by JvmtiThreadState/JvmtiEventController 247 def(JvmtiPendingEvent_lock , Monitor, nonleaf, false); // Used by JvmtiCodeBlobEvents 248 def(Management_lock , Mutex , nonleaf+2, false); // used for JVM management 249 250 def(Compile_lock , Mutex , nonleaf+3, true ); 251 def(MethodData_lock , Mutex , nonleaf+3, false); 252 253 def(MethodCompileQueue_lock , Monitor, nonleaf+4, true ); 254 def(Debug2_lock , Mutex , nonleaf+4, true ); 255 def(Debug3_lock , Mutex , nonleaf+4, true ); 256 def(ProfileVM_lock , Monitor, nonleaf+4, false); // used for profiling of the VMThread 257 def(CompileThread_lock , Monitor, nonleaf+5, false ); 258#ifdef TIERED 259 def(C1_lock , Monitor, nonleaf+5, false ); 260#endif // TIERED 261 262 263} 264 265GCMutexLocker::GCMutexLocker(Monitor * mutex) { 266 if (SafepointSynchronize::is_at_safepoint()) { 267 _locked = false; 268 } else { 269 _mutex = mutex; 270 _locked = true; 271 _mutex->lock(); 272 } 273} 274 275// Print all mutexes/monitors that are currently owned by a thread; called 276// by fatal error handler. 277void print_owned_locks_on_error(outputStream* st) { 278 st->print("VM Mutex/Monitor currently owned by a thread: "); 279 bool none = true; 280 for (int i = 0; i < _num_mutex; i++) { 281 // see if it has an owner 282 if (_mutex_array[i]->owner() != NULL) { 283 if (none) { 284 // print format used by Mutex::print_on_error() 285 st->print_cr(" ([mutex/lock_event])"); 286 none = false; 287 } 288 _mutex_array[i]->print_on_error(st); 289 st->cr(); 290 } 291 } 292 if (none) st->print_cr("None"); 293} 294