Mercurial > hg > truffle
annotate src/share/vm/runtime/mutexLocker.hpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
| author | johnc |
|---|---|
| date | Wed, 18 Aug 2010 10:59:06 -0700 |
| parents | b812ff5abc73 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 // Mutexes used in the VM. | |
| 26 | |
| 27 extern Mutex* Patching_lock; // a lock used to guard code patching of compiled code | |
| 28 extern Monitor* SystemDictionary_lock; // a lock on the system dictonary | |
| 29 extern Mutex* PackageTable_lock; // a lock on the class loader package table | |
| 30 extern Mutex* CompiledIC_lock; // a lock used to guard compiled IC patching and access | |
| 31 extern Mutex* InlineCacheBuffer_lock; // a lock used to guard the InlineCacheBuffer | |
| 32 extern Mutex* VMStatistic_lock; // a lock used to guard statistics count increment | |
| 33 extern Mutex* JNIGlobalHandle_lock; // a lock on creating JNI global handles | |
| 34 extern Mutex* JNIHandleBlockFreeList_lock; // a lock on the JNI handle block free list | |
| 35 extern Mutex* JNICachedItableIndex_lock; // a lock on caching an itable index during JNI invoke | |
| 36 extern Mutex* JmethodIdCreation_lock; // a lock on creating JNI method identifiers | |
| 37 extern Mutex* JfieldIdCreation_lock; // a lock on creating JNI static field identifiers | |
| 38 extern Monitor* JNICritical_lock; // a lock used while entering and exiting JNI critical regions, allows GC to sometimes get in | |
| 39 extern Mutex* JvmtiThreadState_lock; // a lock on modification of JVMTI thread data | |
| 40 extern Monitor* JvmtiPendingEvent_lock; // a lock on the JVMTI pending events list | |
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41 extern Monitor* Heap_lock; // a lock on the heap |
| 0 | 42 extern Mutex* ExpandHeap_lock; // a lock on expanding the heap |
| 43 extern Mutex* AdapterHandlerLibrary_lock; // a lock on the AdapterHandlerLibrary | |
| 44 extern Mutex* SignatureHandlerLibrary_lock; // a lock on the SignatureHandlerLibrary | |
| 45 extern Mutex* VtableStubs_lock; // a lock on the VtableStubs | |
| 46 extern Mutex* SymbolTable_lock; // a lock on the symbol table | |
| 47 extern Mutex* StringTable_lock; // a lock on the interned string table | |
| 48 extern Mutex* CodeCache_lock; // a lock on the CodeCache, rank is special, use MutexLockerEx | |
| 49 extern Mutex* MethodData_lock; // a lock on installation of method data | |
| 50 extern Mutex* RetData_lock; // a lock on installation of RetData inside method data | |
| 51 extern Mutex* DerivedPointerTableGC_lock; // a lock to protect the derived pointer table | |
| 52 extern Monitor* VMOperationQueue_lock; // a lock on queue of vm_operations waiting to execute | |
| 53 extern Monitor* VMOperationRequest_lock; // a lock on Threads waiting for a vm_operation to terminate | |
| 54 extern Monitor* Safepoint_lock; // a lock used by the safepoint abstraction | |
| 55 extern Monitor* Threads_lock; // a lock on the Threads table of active Java threads | |
| 56 // (also used by Safepoints too to block threads creation/destruction) | |
| 57 extern Monitor* CGC_lock; // used for coordination between | |
| 58 // fore- & background GC threads. | |
| 59 extern Mutex* STS_init_lock; // coordinate initialization of SuspendibleThreadSets. | |
| 60 extern Monitor* SLT_lock; // used in CMS GC for acquiring PLL | |
| 61 extern Monitor* iCMS_lock; // CMS incremental mode start/stop notification | |
| 62 extern Monitor* FullGCCount_lock; // in support of "concurrent" full gc | |
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63 extern Monitor* CMark_lock; // used for concurrent mark thread coordination |
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64 extern Monitor* ZF_mon; // used for G1 conc zero-fill. |
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65 extern Monitor* Cleanup_mon; // used for G1 conc cleanup. |
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66 extern Mutex* CMRegionStack_lock; // used for protecting accesses to the CM region stack |
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67 extern Mutex* SATB_Q_FL_lock; // Protects SATB Q |
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68 // buffer free list. |
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69 extern Monitor* SATB_Q_CBL_mon; // Protects SATB Q |
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70 // completed buffer queue. |
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71 extern Mutex* Shared_SATB_Q_lock; // Lock protecting SATB |
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72 // queue shared by |
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73 // non-Java threads. |
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74 |
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75 extern Mutex* DirtyCardQ_FL_lock; // Protects dirty card Q |
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76 // buffer free list. |
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77 extern Monitor* DirtyCardQ_CBL_mon; // Protects dirty card Q |
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78 // completed buffer queue. |
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79 extern Mutex* Shared_DirtyCardQ_lock; // Lock protecting dirty card |
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80 // queue shared by |
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81 // non-Java threads. |
| 0 | 82 // (see option ExplicitGCInvokesConcurrent) |
| 83 extern Mutex* ParGCRareEvent_lock; // Synchronizes various (rare) parallel GC ops. | |
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84 extern Mutex* EvacFailureStack_lock; // guards the evac failure scan stack |
| 0 | 85 extern Mutex* Compile_lock; // a lock held when Compilation is updating code (used to block CodeCache traversal, CHA updates, etc) |
| 86 extern Monitor* MethodCompileQueue_lock; // a lock held when method compilations are enqueued, dequeued | |
| 87 extern Monitor* CompileThread_lock; // a lock held by compile threads during compilation system initialization | |
| 88 extern Mutex* CompileTaskAlloc_lock; // a lock held when CompileTasks are allocated | |
| 89 extern Mutex* CompileStatistics_lock; // a lock held when updating compilation statistics | |
| 90 extern Mutex* MultiArray_lock; // a lock used to guard allocation of multi-dim arrays | |
| 91 extern Monitor* Terminator_lock; // a lock used to guard termination of the vm | |
| 92 extern Monitor* BeforeExit_lock; // a lock used to guard cleanups and shutdown hooks | |
| 93 extern Monitor* Notify_lock; // a lock used to synchronize the start-up of the vm | |
| 94 extern Monitor* Interrupt_lock; // a lock used for condition variable mediated interrupt processing | |
| 95 extern Monitor* ProfileVM_lock; // a lock used for profiling the VMThread | |
| 96 extern Mutex* ProfilePrint_lock; // a lock used to serialize the printing of profiles | |
| 97 extern Mutex* ExceptionCache_lock; // a lock used to synchronize exception cache updates | |
| 98 extern Mutex* OsrList_lock; // a lock used to serialize access to OSR queues | |
| 99 | |
| 100 #ifndef PRODUCT | |
| 101 extern Mutex* FullGCALot_lock; // a lock to make FullGCALot MT safe | |
| 102 #endif | |
| 103 extern Mutex* Debug1_lock; // A bunch of pre-allocated locks that can be used for tracing | |
| 104 extern Mutex* Debug2_lock; // down synchronization related bugs! | |
| 105 extern Mutex* Debug3_lock; | |
| 106 | |
| 107 extern Mutex* RawMonitor_lock; | |
| 108 extern Mutex* PerfDataMemAlloc_lock; // a lock on the allocator for PerfData memory for performance data | |
| 109 extern Mutex* PerfDataManager_lock; // a long on access to PerfDataManager resources | |
| 110 extern Mutex* ParkerFreeList_lock; | |
| 111 extern Mutex* OopMapCacheAlloc_lock; // protects allocation of oop_map caches | |
| 112 | |
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113 extern Mutex* MMUTracker_lock; // protects the MMU |
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114 // tracker data structures |
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115 extern Mutex* HotCardCache_lock; // protects the hot card cache |
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116 |
| 0 | 117 extern Mutex* Management_lock; // a lock used to serialize JVM management |
| 118 extern Monitor* LowMemory_lock; // a lock used for low memory detection | |
| 119 | |
| 120 // A MutexLocker provides mutual exclusion with respect to a given mutex | |
| 121 // for the scope which contains the locker. The lock is an OS lock, not | |
| 122 // an object lock, and the two do not interoperate. Do not use Mutex-based | |
| 123 // locks to lock on Java objects, because they will not be respected if a | |
| 124 // that object is locked using the Java locking mechanism. | |
| 125 // | |
| 126 // NOTE WELL!! | |
| 127 // | |
| 128 // See orderAccess.hpp. We assume throughout the VM that MutexLocker's | |
| 129 // and friends constructors do a fence, a lock and an acquire *in that | |
| 130 // order*. And that their destructors do a release and unlock, in *that* | |
| 131 // order. If their implementations change such that these assumptions | |
| 132 // are violated, a whole lot of code will break. | |
| 133 | |
| 134 // Print all mutexes/monitors that are currently owned by a thread; called | |
| 135 // by fatal error handler. | |
| 136 void print_owned_locks_on_error(outputStream* st); | |
| 137 | |
| 138 char *lock_name(Mutex *mutex); | |
| 139 | |
| 140 class MutexLocker: StackObj { | |
| 141 private: | |
| 142 Monitor * _mutex; | |
| 143 public: | |
| 144 MutexLocker(Monitor * mutex) { | |
| 145 assert(mutex->rank() != Mutex::special, | |
| 146 "Special ranked mutex should only use MutexLockerEx"); | |
| 147 _mutex = mutex; | |
| 148 _mutex->lock(); | |
| 149 } | |
| 150 | |
| 151 // Overloaded constructor passing current thread | |
| 152 MutexLocker(Monitor * mutex, Thread *thread) { | |
| 153 assert(mutex->rank() != Mutex::special, | |
| 154 "Special ranked mutex should only use MutexLockerEx"); | |
| 155 _mutex = mutex; | |
| 156 _mutex->lock(thread); | |
| 157 } | |
| 158 | |
| 159 ~MutexLocker() { | |
| 160 _mutex->unlock(); | |
| 161 } | |
| 162 | |
| 163 }; | |
| 164 | |
| 165 // for debugging: check that we're already owning this lock (or are at a safepoint) | |
| 166 #ifdef ASSERT | |
| 167 void assert_locked_or_safepoint(const Monitor * lock); | |
| 168 void assert_lock_strong(const Monitor * lock); | |
| 169 #else | |
| 170 #define assert_locked_or_safepoint(lock) | |
| 171 #define assert_lock_strong(lock) | |
| 172 #endif | |
| 173 | |
| 174 // A MutexLockerEx behaves like a MutexLocker when its constructor is | |
| 175 // called with a Mutex. Unlike a MutexLocker, its constructor can also be | |
| 176 // called with NULL, in which case the MutexLockerEx is a no-op. There | |
| 177 // is also a corresponding MutexUnlockerEx. We want to keep the | |
| 178 // basic MutexLocker as fast as possible. MutexLockerEx can also lock | |
| 179 // without safepoint check. | |
| 180 | |
| 181 class MutexLockerEx: public StackObj { | |
| 182 private: | |
| 183 Monitor * _mutex; | |
| 184 public: | |
| 185 MutexLockerEx(Monitor * mutex, bool no_safepoint_check = !Mutex::_no_safepoint_check_flag) { | |
| 186 _mutex = mutex; | |
| 187 if (_mutex != NULL) { | |
| 188 assert(mutex->rank() > Mutex::special || no_safepoint_check, | |
| 189 "Mutexes with rank special or lower should not do safepoint checks"); | |
| 190 if (no_safepoint_check) | |
| 191 _mutex->lock_without_safepoint_check(); | |
| 192 else | |
| 193 _mutex->lock(); | |
| 194 } | |
| 195 } | |
| 196 | |
| 197 ~MutexLockerEx() { | |
| 198 if (_mutex != NULL) { | |
| 199 _mutex->unlock(); | |
| 200 } | |
| 201 } | |
| 202 }; | |
| 203 | |
| 204 // A MonitorLockerEx is like a MutexLockerEx above, except it takes | |
| 205 // a possibly null Monitor, and allows wait/notify as well which are | |
| 206 // delegated to the underlying Monitor. | |
| 207 | |
| 208 class MonitorLockerEx: public MutexLockerEx { | |
| 209 private: | |
| 210 Monitor * _monitor; | |
| 211 public: | |
| 212 MonitorLockerEx(Monitor* monitor, | |
| 213 bool no_safepoint_check = !Mutex::_no_safepoint_check_flag): | |
| 214 MutexLockerEx(monitor, no_safepoint_check), | |
| 215 _monitor(monitor) { | |
| 216 // Superclass constructor did locking | |
| 217 } | |
| 218 | |
| 219 ~MonitorLockerEx() { | |
| 220 #ifdef ASSERT | |
| 221 if (_monitor != NULL) { | |
| 222 assert_lock_strong(_monitor); | |
| 223 } | |
| 224 #endif // ASSERT | |
| 225 // Superclass destructor will do unlocking | |
| 226 } | |
| 227 | |
| 228 bool wait(bool no_safepoint_check = !Mutex::_no_safepoint_check_flag, | |
| 229 long timeout = 0, | |
| 230 bool as_suspend_equivalent = !Mutex::_as_suspend_equivalent_flag) { | |
| 231 if (_monitor != NULL) { | |
| 232 return _monitor->wait(no_safepoint_check, timeout, as_suspend_equivalent); | |
| 233 } | |
| 234 return false; | |
| 235 } | |
| 236 | |
| 237 bool notify_all() { | |
| 238 if (_monitor != NULL) { | |
| 239 return _monitor->notify_all(); | |
| 240 } | |
| 241 return true; | |
| 242 } | |
| 243 | |
| 244 bool notify() { | |
| 245 if (_monitor != NULL) { | |
| 246 return _monitor->notify(); | |
| 247 } | |
| 248 return true; | |
| 249 } | |
| 250 }; | |
| 251 | |
| 252 | |
| 253 | |
| 254 // A GCMutexLocker is usually initialized with a mutex that is | |
| 255 // automatically acquired in order to do GC. The function that | |
| 256 // synchronizes using a GCMutexLocker may be called both during and between | |
| 257 // GC's. Thus, it must acquire the mutex if GC is not in progress, but not | |
| 258 // if GC is in progress (since the mutex is already held on its behalf.) | |
| 259 | |
| 260 class GCMutexLocker: public StackObj { | |
| 261 private: | |
| 262 Monitor * _mutex; | |
| 263 bool _locked; | |
| 264 public: | |
| 265 GCMutexLocker(Monitor * mutex); | |
| 266 ~GCMutexLocker() { if (_locked) _mutex->unlock(); } | |
| 267 }; | |
| 268 | |
| 269 | |
| 270 | |
| 271 // A MutexUnlocker temporarily exits a previously | |
| 272 // entered mutex for the scope which contains the unlocker. | |
| 273 | |
| 274 class MutexUnlocker: StackObj { | |
| 275 private: | |
| 276 Monitor * _mutex; | |
| 277 | |
| 278 public: | |
| 279 MutexUnlocker(Monitor * mutex) { | |
| 280 _mutex = mutex; | |
| 281 _mutex->unlock(); | |
| 282 } | |
| 283 | |
| 284 ~MutexUnlocker() { | |
| 285 _mutex->lock(); | |
| 286 } | |
| 287 }; | |
| 288 | |
| 289 // A MutexUnlockerEx temporarily exits a previously | |
| 290 // entered mutex for the scope which contains the unlocker. | |
| 291 | |
| 292 class MutexUnlockerEx: StackObj { | |
| 293 private: | |
| 294 Monitor * _mutex; | |
| 295 bool _no_safepoint_check; | |
| 296 | |
| 297 public: | |
| 298 MutexUnlockerEx(Monitor * mutex, bool no_safepoint_check = !Mutex::_no_safepoint_check_flag) { | |
| 299 _mutex = mutex; | |
| 300 _no_safepoint_check = no_safepoint_check; | |
| 301 _mutex->unlock(); | |
| 302 } | |
| 303 | |
| 304 ~MutexUnlockerEx() { | |
| 305 if (_no_safepoint_check == Mutex::_no_safepoint_check_flag) { | |
| 306 _mutex->lock_without_safepoint_check(); | |
| 307 } else { | |
| 308 _mutex->lock(); | |
| 309 } | |
| 310 } | |
| 311 }; | |
| 312 | |
| 313 #ifndef PRODUCT | |
| 314 // | |
| 315 // A special MutexLocker that allows: | |
| 316 // - reentrant locking | |
| 317 // - locking out of order | |
| 318 // | |
| 319 // Only too be used for verify code, where we can relaxe out dead-lock | |
| 320 // dection code a bit (unsafe, but probably ok). This code is NEVER to | |
| 321 // be included in a product version. | |
| 322 // | |
| 323 class VerifyMutexLocker: StackObj { | |
| 324 private: | |
| 325 Monitor * _mutex; | |
| 326 bool _reentrant; | |
| 327 public: | |
| 328 VerifyMutexLocker(Monitor * mutex) { | |
| 329 _mutex = mutex; | |
| 330 _reentrant = mutex->owned_by_self(); | |
| 331 if (!_reentrant) { | |
| 332 // We temp. diable strict safepoint checking, while we require the lock | |
| 333 FlagSetting fs(StrictSafepointChecks, false); | |
| 334 _mutex->lock(); | |
| 335 } | |
| 336 } | |
| 337 | |
| 338 ~VerifyMutexLocker() { | |
| 339 if (!_reentrant) { | |
| 340 _mutex->unlock(); | |
| 341 } | |
| 342 } | |
| 343 }; | |
| 344 | |
| 345 #endif |