mutexLocker.cpp revision 3032:0a10d80352d5
11541Srgrimes/* 21541Srgrimes * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 31541Srgrimes * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 41541Srgrimes * 51541Srgrimes * This code is free software; you can redistribute it and/or modify it 61541Srgrimes * under the terms of the GNU General Public License version 2 only, as 71541Srgrimes * published by the Free Software Foundation. 81541Srgrimes * 91541Srgrimes * This code is distributed in the hope that it will be useful, but WITHOUT 101541Srgrimes * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 111541Srgrimes * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 121541Srgrimes * version 2 for more details (a copy is included in the LICENSE file that 131541Srgrimes * accompanied this code). 141541Srgrimes * 151541Srgrimes * You should have received a copy of the GNU General Public License version 161541Srgrimes * 2 along with this work; if not, write to the Free Software Foundation, 171541Srgrimes * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 181541Srgrimes * 191541Srgrimes * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 201541Srgrimes * or visit www.oracle.com if you need additional information or have any 211541Srgrimes * questions. 221541Srgrimes * 231541Srgrimes */ 241541Srgrimes 251541Srgrimes#include "precompiled.hpp" 261541Srgrimes#include "runtime/mutexLocker.hpp" 271541Srgrimes#include "runtime/safepoint.hpp" 281541Srgrimes#include "runtime/threadLocalStorage.hpp" 291541Srgrimes#include "runtime/vmThread.hpp" 301541Srgrimes#ifdef TARGET_OS_FAMILY_linux 311541Srgrimes# include "thread_linux.inline.hpp" 321541Srgrimes#endif 331541Srgrimes#ifdef TARGET_OS_FAMILY_solaris 341541Srgrimes# include "thread_solaris.inline.hpp" 351541Srgrimes#endif 361541Srgrimes#ifdef TARGET_OS_FAMILY_windows 371541Srgrimes# include "thread_windows.inline.hpp" 381541Srgrimes#endif 393304Sphk#ifdef TARGET_OS_FAMILY_bsd 401541Srgrimes# include "thread_bsd.inline.hpp" 411541Srgrimes#endif 422165Spaul 432865Sbde// Mutexes used in the VM (see comment in mutexLocker.hpp): 442165Spaul// 451549Srgrimes// Note that the following pointers are effectively final -- after having been 461549Srgrimes// set at JVM startup-time, they should never be subsequently mutated. 471541Srgrimes// Instead of using pointers to malloc()ed monitors and mutexes we should consider 481541Srgrimes// eliminating the indirection and using instances instead. 491541Srgrimes// Consider using GCC's __read_mostly. 501541Srgrimes 511541SrgrimesMutex* Patching_lock = NULL; 521541SrgrimesMonitor* SystemDictionary_lock = NULL; 531541SrgrimesMutex* PackageTable_lock = NULL; 541541SrgrimesMutex* CompiledIC_lock = NULL; 551541SrgrimesMutex* InlineCacheBuffer_lock = NULL; 561541SrgrimesMutex* VMStatistic_lock = NULL; 571541SrgrimesMutex* JNIGlobalHandle_lock = NULL; 581541SrgrimesMutex* JNIHandleBlockFreeList_lock = NULL; 591541SrgrimesMutex* JNICachedItableIndex_lock = NULL; 601541SrgrimesMutex* JmethodIdCreation_lock = NULL; 611541SrgrimesMutex* JfieldIdCreation_lock = NULL; 621541SrgrimesMonitor* JNICritical_lock = NULL; 631541SrgrimesMutex* JvmtiThreadState_lock = NULL; 641541SrgrimesMonitor* JvmtiPendingEvent_lock = NULL; 651541SrgrimesMonitor* Heap_lock = NULL; 661541SrgrimesMutex* ExpandHeap_lock = NULL; 671541SrgrimesMutex* AdapterHandlerLibrary_lock = NULL; 681541SrgrimesMutex* SignatureHandlerLibrary_lock = NULL; 691858SdgMutex* VtableStubs_lock = NULL; 701541SrgrimesMutex* SymbolTable_lock = NULL; 711541SrgrimesMutex* StringTable_lock = NULL; 721541SrgrimesMutex* CodeCache_lock = NULL; 731541SrgrimesMutex* MethodData_lock = NULL; 741541SrgrimesMutex* RetData_lock = NULL; 751541SrgrimesMonitor* VMOperationQueue_lock = NULL; 761541SrgrimesMonitor* VMOperationRequest_lock = NULL; 771541SrgrimesMonitor* Safepoint_lock = NULL; 781541SrgrimesMonitor* SerializePage_lock = NULL; 791541SrgrimesMonitor* Threads_lock = NULL; 801541SrgrimesMonitor* CGC_lock = NULL; 811541SrgrimesMutex* STS_init_lock = NULL; 821541SrgrimesMonitor* SLT_lock = NULL; 831541SrgrimesMonitor* iCMS_lock = NULL; 841541SrgrimesMonitor* FullGCCount_lock = NULL; 851541SrgrimesMonitor* CMark_lock = NULL; 861541SrgrimesMutex* CMRegionStack_lock = NULL; 871541SrgrimesMutex* SATB_Q_FL_lock = NULL; 881541SrgrimesMonitor* SATB_Q_CBL_mon = NULL; 891541SrgrimesMutex* Shared_SATB_Q_lock = NULL; 901541SrgrimesMutex* DirtyCardQ_FL_lock = NULL; 911541SrgrimesMonitor* DirtyCardQ_CBL_mon = NULL; 921541SrgrimesMutex* Shared_DirtyCardQ_lock = NULL; 931541SrgrimesMutex* ParGCRareEvent_lock = NULL; 941541SrgrimesMutex* EvacFailureStack_lock = NULL; 951541SrgrimesMutex* DerivedPointerTableGC_lock = NULL; 961541SrgrimesMutex* Compile_lock = NULL; 971541SrgrimesMonitor* MethodCompileQueue_lock = NULL; 981541SrgrimesMonitor* CompileThread_lock = NULL; 991541SrgrimesMutex* CompileTaskAlloc_lock = NULL; 1001541SrgrimesMutex* CompileStatistics_lock = NULL; 1011541SrgrimesMutex* MultiArray_lock = NULL; 1021541SrgrimesMonitor* Terminator_lock = NULL; 1031541SrgrimesMonitor* BeforeExit_lock = NULL; 1041541SrgrimesMonitor* Notify_lock = NULL; 1051541SrgrimesMonitor* Interrupt_lock = NULL; 1061541SrgrimesMonitor* ProfileVM_lock = NULL; 1071541SrgrimesMutex* ProfilePrint_lock = NULL; 1081541SrgrimesMutex* ExceptionCache_lock = NULL; 1091541SrgrimesMonitor* ObjAllocPost_lock = NULL; 1101541SrgrimesMutex* OsrList_lock = NULL; 1113304Sphk#ifndef PRODUCT 1121541SrgrimesMutex* FullGCALot_lock = NULL; 1131541Srgrimes#endif 1142059Sdg 1152059SdgMutex* Debug1_lock = NULL; 1161541SrgrimesMutex* Debug2_lock = NULL; 1171541SrgrimesMutex* Debug3_lock = NULL; 1181541Srgrimes 1191541SrgrimesMutex* tty_lock = NULL; 1202112Swollman 1211541SrgrimesMutex* RawMonitor_lock = NULL; 1221541SrgrimesMutex* PerfDataMemAlloc_lock = NULL; 1231541SrgrimesMutex* PerfDataManager_lock = NULL; 1241541SrgrimesMutex* OopMapCacheAlloc_lock = NULL; 1251541Srgrimes 1262811SbdeMutex* FreeList_lock = NULL; 1271541SrgrimesMonitor* SecondaryFreeList_lock = NULL; 1281541SrgrimesMutex* OldSets_lock = NULL; 1291541SrgrimesMonitor* RootRegionScan_lock = NULL; 1301541SrgrimesMutex* MMUTracker_lock = NULL; 1311541SrgrimesMutex* HotCardCache_lock = NULL; 1321541Srgrimes 1331541SrgrimesMonitor* GCTaskManager_lock = NULL; 1341541Srgrimes 1351541SrgrimesMutex* Management_lock = NULL; 1361541SrgrimesMonitor* Service_lock = NULL; 1371541SrgrimesMutex* Stacktrace_lock = NULL; 1381541Srgrimes 1391541SrgrimesMonitor* JfrQuery_lock = NULL; 1401541SrgrimesMonitor* JfrMsg_lock = NULL; 1411541SrgrimesMutex* JfrBuffer_lock = NULL; 1421541SrgrimesMutex* JfrStream_lock = NULL; 1431541Srgrimes 1441541Srgrimes#define MAX_NUM_MUTEX 128 1451541Srgrimesstatic Monitor * _mutex_array[MAX_NUM_MUTEX]; 1461541Srgrimesstatic int _num_mutex; 1471541Srgrimes 1481541Srgrimes#ifdef ASSERT 1491541Srgrimesvoid assert_locked_or_safepoint(const Monitor * lock) { 1501541Srgrimes // check if this thread owns the lock (common case) 1511541Srgrimes if (IgnoreLockingAssertions) return; 1521541Srgrimes assert(lock != NULL, "Need non-NULL lock"); 1531541Srgrimes if (lock->owned_by_self()) return; 1541541Srgrimes if (SafepointSynchronize::is_at_safepoint()) return; 1551541Srgrimes if (!Universe::is_fully_initialized()) return; 1561541Srgrimes // see if invoker of VM operation owns it 1571541Srgrimes VM_Operation* op = VMThread::vm_operation(); 1581541Srgrimes if (op != NULL && op->calling_thread() == lock->owner()) return; 1592112Swollman fatal(err_msg("must own lock %s", lock->name())); 1602112Swollman} 1612112Swollman 1622112Swollman// a stronger assertion than the above 1632112Swollmanvoid assert_lock_strong(const Monitor * lock) { 1642112Swollman if (IgnoreLockingAssertions) return; 1652112Swollman assert(lock != NULL, "Need non-NULL lock"); 1662112Swollman if (lock->owned_by_self()) return; 1672112Swollman fatal(err_msg("must own lock %s", lock->name())); 1682112Swollman} 1692112Swollman#endif 1702112Swollman 1712112Swollman#define def(var, type, pri, vm_block) { \ 1722112Swollman var = new type(Mutex::pri, #var, vm_block); \ 1732112Swollman assert(_num_mutex < MAX_NUM_MUTEX, \ 1742112Swollman "increase MAX_NUM_MUTEX"); \ 1752112Swollman _mutex_array[_num_mutex++] = var; \ 1762112Swollman} 1772112Swollman 1782112Swollmanvoid mutex_init() { 1792112Swollman def(tty_lock , Mutex , event, true ); // allow to lock in VM 1802112Swollman 1812112Swollman def(CGC_lock , Monitor, special, true ); // coordinate between fore- and background GC 1822112Swollman def(STS_init_lock , Mutex, leaf, true ); 1832112Swollman if (UseConcMarkSweepGC) { 1842112Swollman def(iCMS_lock , Monitor, special, true ); // CMS incremental mode start/stop notification 1852165Spaul } 1862865Sbde if (UseConcMarkSweepGC || UseG1GC) { 187 def(FullGCCount_lock , Monitor, leaf, true ); // in support of ExplicitGCInvokesConcurrent 188 } 189 if (UseG1GC) { 190 def(CMark_lock , Monitor, nonleaf, true ); // coordinate concurrent mark thread 191 def(CMRegionStack_lock , Mutex, leaf, true ); 192 def(SATB_Q_FL_lock , Mutex , special, true ); 193 def(SATB_Q_CBL_mon , Monitor, nonleaf, true ); 194 def(Shared_SATB_Q_lock , Mutex, nonleaf, true ); 195 196 def(DirtyCardQ_FL_lock , Mutex , special, true ); 197 def(DirtyCardQ_CBL_mon , Monitor, nonleaf, true ); 198 def(Shared_DirtyCardQ_lock , Mutex, nonleaf, true ); 199 200 def(FreeList_lock , Mutex, leaf , true ); 201 def(SecondaryFreeList_lock , Monitor, leaf , true ); 202 def(OldSets_lock , Mutex , leaf , true ); 203 def(RootRegionScan_lock , Monitor, leaf , true ); 204 def(MMUTracker_lock , Mutex , leaf , true ); 205 def(HotCardCache_lock , Mutex , special , true ); 206 def(EvacFailureStack_lock , Mutex , nonleaf , true ); 207 } 208 def(ParGCRareEvent_lock , Mutex , leaf , true ); 209 def(DerivedPointerTableGC_lock , Mutex, leaf, true ); 210 def(CodeCache_lock , Mutex , special, true ); 211 def(Interrupt_lock , Monitor, special, true ); // used for interrupt processing 212 def(RawMonitor_lock , Mutex, special, true ); 213 def(OopMapCacheAlloc_lock , Mutex, leaf, true ); // used for oop_map_cache allocation. 214 215 def(Patching_lock , Mutex , special, true ); // used for safepointing and code patching. 216 def(ObjAllocPost_lock , Monitor, special, false); 217 def(Service_lock , Monitor, special, true ); // used for service thread operations 218 def(Stacktrace_lock , Mutex, special, true ); // used for JFR stacktrace database 219 def(JmethodIdCreation_lock , Mutex , leaf, true ); // used for creating jmethodIDs. 220 221 def(SystemDictionary_lock , Monitor, leaf, true ); // lookups done by VM thread 222 def(PackageTable_lock , Mutex , leaf, false); 223 def(InlineCacheBuffer_lock , Mutex , leaf, true ); 224 def(VMStatistic_lock , Mutex , leaf, false); 225 def(ExpandHeap_lock , Mutex , leaf, true ); // Used during compilation by VM thread 226 def(JNIHandleBlockFreeList_lock , Mutex , leaf, true ); // handles are used by VM thread 227 def(SignatureHandlerLibrary_lock , Mutex , leaf, false); 228 def(SymbolTable_lock , Mutex , leaf, true ); 229 def(StringTable_lock , Mutex , leaf, true ); 230 def(ProfilePrint_lock , Mutex , leaf, false); // serial profile printing 231 def(ExceptionCache_lock , Mutex , leaf, false); // serial profile printing 232 def(OsrList_lock , Mutex , leaf, true ); 233 def(Debug1_lock , Mutex , leaf, true ); 234#ifndef PRODUCT 235 def(FullGCALot_lock , Mutex , leaf, false); // a lock to make FullGCALot MT safe 236#endif 237 def(BeforeExit_lock , Monitor, leaf, true ); 238 def(PerfDataMemAlloc_lock , Mutex , leaf, true ); // used for allocating PerfData memory for performance data 239 def(PerfDataManager_lock , Mutex , leaf, true ); // used for synchronized access to PerfDataManager resources 240 241 // CMS_modUnionTable_lock leaf 242 // CMS_bitMap_lock leaf + 1 243 // CMS_freeList_lock leaf + 2 244 245 def(Safepoint_lock , Monitor, safepoint, true ); // locks SnippetCache_lock/Threads_lock 246 247 def(Threads_lock , Monitor, barrier, true ); 248 249 def(VMOperationQueue_lock , Monitor, nonleaf, true ); // VM_thread allowed to block on these 250 def(VMOperationRequest_lock , Monitor, nonleaf, true ); 251 def(RetData_lock , Mutex , nonleaf, false); 252 def(Terminator_lock , Monitor, nonleaf, true ); 253 def(VtableStubs_lock , Mutex , nonleaf, true ); 254 def(Notify_lock , Monitor, nonleaf, true ); 255 def(JNIGlobalHandle_lock , Mutex , nonleaf, true ); // locks JNIHandleBlockFreeList_lock 256 def(JNICritical_lock , Monitor, nonleaf, true ); // used for JNI critical regions 257 def(AdapterHandlerLibrary_lock , Mutex , nonleaf, true); 258 if (UseConcMarkSweepGC) { 259 def(SLT_lock , Monitor, nonleaf, false ); 260 // used in CMS GC for locking PLL lock 261 } 262 def(Heap_lock , Monitor, nonleaf+1, false); 263 def(JfieldIdCreation_lock , Mutex , nonleaf+1, true ); // jfieldID, Used in VM_Operation 264 def(JNICachedItableIndex_lock , Mutex , nonleaf+1, false); // Used to cache an itable index during JNI invoke 265 266 def(CompiledIC_lock , Mutex , nonleaf+2, false); // locks VtableStubs_lock, InlineCacheBuffer_lock 267 def(CompileTaskAlloc_lock , Mutex , nonleaf+2, true ); 268 def(CompileStatistics_lock , Mutex , nonleaf+2, false); 269 def(MultiArray_lock , Mutex , nonleaf+2, false); // locks SymbolTable_lock 270 271 def(JvmtiThreadState_lock , Mutex , nonleaf+2, false); // Used by JvmtiThreadState/JvmtiEventController 272 def(JvmtiPendingEvent_lock , Monitor, nonleaf, false); // Used by JvmtiCodeBlobEvents 273 def(Management_lock , Mutex , nonleaf+2, false); // used for JVM management 274 275 def(Compile_lock , Mutex , nonleaf+3, true ); 276 def(MethodData_lock , Mutex , nonleaf+3, false); 277 278 def(MethodCompileQueue_lock , Monitor, nonleaf+4, true ); 279 def(Debug2_lock , Mutex , nonleaf+4, true ); 280 def(Debug3_lock , Mutex , nonleaf+4, true ); 281 def(ProfileVM_lock , Monitor, nonleaf+4, false); // used for profiling of the VMThread 282 def(CompileThread_lock , Monitor, nonleaf+5, false ); 283 284 def(JfrQuery_lock , Monitor, nonleaf, true); // JFR locks, keep these in consecutive order 285 def(JfrMsg_lock , Monitor, nonleaf+2, true); 286 def(JfrBuffer_lock , Mutex, nonleaf+3, true); 287 def(JfrStream_lock , Mutex, nonleaf+4, true); 288} 289 290GCMutexLocker::GCMutexLocker(Monitor * mutex) { 291 if (SafepointSynchronize::is_at_safepoint()) { 292 _locked = false; 293 } else { 294 _mutex = mutex; 295 _locked = true; 296 _mutex->lock(); 297 } 298} 299 300// Print all mutexes/monitors that are currently owned by a thread; called 301// by fatal error handler. 302void print_owned_locks_on_error(outputStream* st) { 303 st->print("VM Mutex/Monitor currently owned by a thread: "); 304 bool none = true; 305 for (int i = 0; i < _num_mutex; i++) { 306 // see if it has an owner 307 if (_mutex_array[i]->owner() != NULL) { 308 if (none) { 309 // print format used by Mutex::print_on_error() 310 st->print_cr(" ([mutex/lock_event])"); 311 none = false; 312 } 313 _mutex_array[i]->print_on_error(st); 314 st->cr(); 315 } 316 } 317 if (none) st->print_cr("None"); 318} 319