mutexLocker.cpp revision 3602:da91efe96a93
1/* 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "precompiled.hpp" 26#include "runtime/mutexLocker.hpp" 27#include "runtime/safepoint.hpp" 28#include "runtime/threadLocalStorage.hpp" 29#include "runtime/vmThread.hpp" 30#ifdef TARGET_OS_FAMILY_linux 31# include "thread_linux.inline.hpp" 32#endif 33#ifdef TARGET_OS_FAMILY_solaris 34# include "thread_solaris.inline.hpp" 35#endif 36#ifdef TARGET_OS_FAMILY_windows 37# include "thread_windows.inline.hpp" 38#endif 39#ifdef TARGET_OS_FAMILY_bsd 40# include "thread_bsd.inline.hpp" 41#endif 42 43// Mutexes used in the VM (see comment in mutexLocker.hpp): 44// 45// Note that the following pointers are effectively final -- after having been 46// set at JVM startup-time, they should never be subsequently mutated. 47// Instead of using pointers to malloc()ed monitors and mutexes we should consider 48// eliminating the indirection and using instances instead. 49// Consider using GCC's __read_mostly. 50 51Mutex* Patching_lock = NULL; 52Monitor* SystemDictionary_lock = NULL; 53Mutex* PackageTable_lock = NULL; 54Mutex* CompiledIC_lock = NULL; 55Mutex* InlineCacheBuffer_lock = NULL; 56Mutex* VMStatistic_lock = NULL; 57Mutex* JNIGlobalHandle_lock = NULL; 58Mutex* JNIHandleBlockFreeList_lock = NULL; 59Mutex* JNICachedItableIndex_lock = NULL; 60Mutex* JmethodIdCreation_lock = NULL; 61Mutex* JfieldIdCreation_lock = NULL; 62Monitor* JNICritical_lock = NULL; 63Mutex* JvmtiThreadState_lock = NULL; 64Monitor* JvmtiPendingEvent_lock = NULL; 65Monitor* Heap_lock = NULL; 66Mutex* ExpandHeap_lock = NULL; 67Mutex* AdapterHandlerLibrary_lock = NULL; 68Mutex* SignatureHandlerLibrary_lock = NULL; 69Mutex* VtableStubs_lock = NULL; 70Mutex* SymbolTable_lock = NULL; 71Mutex* StringTable_lock = NULL; 72Mutex* CodeCache_lock = NULL; 73Mutex* MethodData_lock = NULL; 74Mutex* RetData_lock = NULL; 75Monitor* VMOperationQueue_lock = NULL; 76Monitor* VMOperationRequest_lock = NULL; 77Monitor* Safepoint_lock = NULL; 78Monitor* SerializePage_lock = NULL; 79Monitor* Threads_lock = NULL; 80Monitor* CGC_lock = NULL; 81Mutex* STS_init_lock = NULL; 82Monitor* SLT_lock = NULL; 83Monitor* iCMS_lock = NULL; 84Monitor* FullGCCount_lock = NULL; 85Monitor* CMark_lock = NULL; 86Mutex* CMRegionStack_lock = NULL; 87Mutex* SATB_Q_FL_lock = NULL; 88Monitor* SATB_Q_CBL_mon = NULL; 89Mutex* Shared_SATB_Q_lock = NULL; 90Mutex* DirtyCardQ_FL_lock = NULL; 91Monitor* DirtyCardQ_CBL_mon = NULL; 92Mutex* Shared_DirtyCardQ_lock = NULL; 93Mutex* ParGCRareEvent_lock = NULL; 94Mutex* EvacFailureStack_lock = NULL; 95Mutex* DerivedPointerTableGC_lock = NULL; 96Mutex* Compile_lock = NULL; 97Monitor* MethodCompileQueue_lock = NULL; 98Monitor* CompileThread_lock = NULL; 99Mutex* CompileTaskAlloc_lock = NULL; 100Mutex* CompileStatistics_lock = NULL; 101Mutex* MultiArray_lock = NULL; 102Monitor* Terminator_lock = NULL; 103Monitor* BeforeExit_lock = NULL; 104Monitor* Notify_lock = NULL; 105Monitor* Interrupt_lock = NULL; 106Monitor* ProfileVM_lock = NULL; 107Mutex* ProfilePrint_lock = NULL; 108Mutex* ExceptionCache_lock = NULL; 109Monitor* ObjAllocPost_lock = NULL; 110Mutex* OsrList_lock = NULL; 111#ifndef PRODUCT 112Mutex* FullGCALot_lock = NULL; 113#endif 114 115Mutex* Debug1_lock = NULL; 116Mutex* Debug2_lock = NULL; 117Mutex* Debug3_lock = NULL; 118 119Mutex* tty_lock = NULL; 120 121Mutex* RawMonitor_lock = NULL; 122Mutex* PerfDataMemAlloc_lock = NULL; 123Mutex* PerfDataManager_lock = NULL; 124Mutex* OopMapCacheAlloc_lock = NULL; 125 126Mutex* FreeList_lock = NULL; 127Monitor* SecondaryFreeList_lock = NULL; 128Mutex* OldSets_lock = NULL; 129Monitor* RootRegionScan_lock = NULL; 130Mutex* MMUTracker_lock = NULL; 131Mutex* HotCardCache_lock = NULL; 132 133Monitor* GCTaskManager_lock = NULL; 134 135Mutex* Management_lock = NULL; 136Monitor* Service_lock = NULL; 137Mutex* Stacktrace_lock = NULL; 138 139Monitor* JfrQuery_lock = NULL; 140Monitor* JfrMsg_lock = NULL; 141Mutex* JfrBuffer_lock = NULL; 142Mutex* JfrStream_lock = NULL; 143 144#define MAX_NUM_MUTEX 128 145static Monitor * _mutex_array[MAX_NUM_MUTEX]; 146static int _num_mutex; 147 148#ifdef ASSERT 149void assert_locked_or_safepoint(const Monitor * lock) { 150 // check if this thread owns the lock (common case) 151 if (IgnoreLockingAssertions) return; 152 assert(lock != NULL, "Need non-NULL lock"); 153 if (lock->owned_by_self()) return; 154 if (SafepointSynchronize::is_at_safepoint()) return; 155 if (!Universe::is_fully_initialized()) return; 156 // see if invoker of VM operation owns it 157 VM_Operation* op = VMThread::vm_operation(); 158 if (op != NULL && op->calling_thread() == lock->owner()) return; 159 fatal(err_msg("must own lock %s", lock->name())); 160} 161 162// a stronger assertion than the above 163void assert_lock_strong(const Monitor * lock) { 164 if (IgnoreLockingAssertions) return; 165 assert(lock != NULL, "Need non-NULL lock"); 166 if (lock->owned_by_self()) return; 167 fatal(err_msg("must own lock %s", lock->name())); 168} 169#endif 170 171#define def(var, type, pri, vm_block) { \ 172 var = new type(Mutex::pri, #var, vm_block); \ 173 assert(_num_mutex < MAX_NUM_MUTEX, \ 174 "increase MAX_NUM_MUTEX"); \ 175 _mutex_array[_num_mutex++] = var; \ 176} 177 178void mutex_init() { 179 def(tty_lock , Mutex , event, true ); // allow to lock in VM 180 181 def(CGC_lock , Monitor, special, true ); // coordinate between fore- and background GC 182 def(STS_init_lock , Mutex, leaf, true ); 183 if (UseConcMarkSweepGC) { 184 def(iCMS_lock , Monitor, special, true ); // CMS incremental mode start/stop notification 185 } 186 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+2, 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