22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "memory/universe.hpp"
27 #include "runtime/mutexLocker.hpp"
28 #include "runtime/os.inline.hpp"
29 #include "runtime/safepoint.hpp"
30 #include "runtime/thread.inline.hpp"
31 #include "runtime/vmThread.hpp"
32
33 // Mutexes used in the VM (see comment in mutexLocker.hpp):
34 //
35 // Note that the following pointers are effectively final -- after having been
36 // set at JVM startup-time, they should never be subsequently mutated.
37 // Instead of using pointers to malloc()ed monitors and mutexes we should consider
38 // eliminating the indirection and using instances instead.
39 // Consider using GCC's __read_mostly.
40
41 Mutex* Patching_lock = NULL;
42 Monitor* SystemDictionary_lock = NULL;
43 Mutex* ProtectionDomainSet_lock = NULL;
44 Mutex* SharedDictionary_lock = NULL;
45 Mutex* Module_lock = NULL;
46 Mutex* CompiledIC_lock = NULL;
47 Mutex* InlineCacheBuffer_lock = NULL;
48 Mutex* VMStatistic_lock = NULL;
49 Mutex* JNIHandleBlockFreeList_lock = NULL;
50 Mutex* JmethodIdCreation_lock = NULL;
51 Mutex* JfieldIdCreation_lock = NULL;
52 Monitor* JNICritical_lock = NULL;
53 Mutex* JvmtiThreadState_lock = NULL;
54 Monitor* Heap_lock = NULL;
55 Mutex* ExpandHeap_lock = NULL;
56 Mutex* AdapterHandlerLibrary_lock = NULL;
57 Mutex* SignatureHandlerLibrary_lock = NULL;
58 Mutex* VtableStubs_lock = NULL;
59 Mutex* SymbolArena_lock = NULL;
60 Monitor* StringDedupQueue_lock = NULL;
61 Mutex* StringDedupTable_lock = NULL;
216
217 def(MarkStackFreeList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never);
218 def(MarkStackChunkList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never);
219
220 def(MonitoringSupport_lock , PaddedMutex , native , true, Monitor::_safepoint_check_never); // used for serviceability monitoring support
221 }
222 if (UseShenandoahGC) {
223 def(StringDedupQueue_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never);
224 def(StringDedupTable_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never);
225 }
226 def(ParGCRareEvent_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_always);
227 def(CGCPhaseManager_lock , PaddedMonitor, leaf, false, Monitor::_safepoint_check_always);
228 def(CodeCache_lock , PaddedMonitor, special, true, Monitor::_safepoint_check_never);
229 def(RawMonitor_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never);
230 def(OopMapCacheAlloc_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for oop_map_cache allocation.
231
232 def(MetaspaceExpand_lock , PaddedMutex , leaf-1, true, Monitor::_safepoint_check_never);
233 def(ClassLoaderDataGraph_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_always);
234
235 def(Patching_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never); // used for safepointing and code patching.
236 def(Service_lock , PaddedMonitor, special, true, Monitor::_safepoint_check_never); // used for service thread operations
237 def(JmethodIdCreation_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for creating jmethodIDs.
238
239 def(SystemDictionary_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always);
240 def(ProtectionDomainSet_lock , PaddedMutex , leaf-1, true, Monitor::_safepoint_check_never);
241 def(SharedDictionary_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always);
242 def(Module_lock , PaddedMutex , leaf+2, true, Monitor::_safepoint_check_always);
243 def(InlineCacheBuffer_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never);
244 def(VMStatistic_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always);
245 def(ExpandHeap_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // Used during compilation by VM thread
246 def(JNIHandleBlockFreeList_lock , PaddedMutex , leaf-1, true, Monitor::_safepoint_check_never); // handles are used by VM thread
247 def(SignatureHandlerLibrary_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always);
248 def(SymbolArena_lock , PaddedMutex , leaf+2, true, Monitor::_safepoint_check_never);
249 def(ProfilePrint_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // serial profile printing
250 def(ExceptionCache_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // serial profile printing
251 def(OsrList_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never);
252 def(Debug1_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never);
253 #ifndef PRODUCT
254 def(FullGCALot_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // a lock to make FullGCALot MT safe
255 #endif
256 def(BeforeExit_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always);
257 def(PerfDataMemAlloc_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for allocating PerfData memory for performance data
258 def(PerfDataManager_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for synchronized access to PerfDataManager resources
259
260 // CMS_modUnionTable_lock leaf
261 // CMS_bitMap_lock leaf 1
262 // CMS_freeList_lock leaf 2
263
264 def(Threads_lock , PaddedMonitor, barrier, true, Monitor::_safepoint_check_always); // Used for safepoint protocol.
265 def(NonJavaThreadsList_lock , PaddedMutex, leaf, true, Monitor::_safepoint_check_never);
266 def(NonJavaThreadsListSync_lock , PaddedMutex, leaf, true, Monitor::_safepoint_check_never);
267
268 def(VMOperationQueue_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_never); // VM_thread allowed to block on these
269 def(VMOperationRequest_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_always);
270 def(RetData_lock , PaddedMutex , nonleaf, false, Monitor::_safepoint_check_always);
271 def(Terminator_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_always);
|
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "memory/universe.hpp"
27 #include "runtime/mutexLocker.hpp"
28 #include "runtime/os.inline.hpp"
29 #include "runtime/safepoint.hpp"
30 #include "runtime/thread.inline.hpp"
31 #include "runtime/vmThread.hpp"
32
33 // Mutexes used in the VM (see comment in mutexLocker.hpp):
34 //
35 // Note that the following pointers are effectively final -- after having been
36 // set at JVM startup-time, they should never be subsequently mutated.
37 // Instead of using pointers to malloc()ed monitors and mutexes we should consider
38 // eliminating the indirection and using instances instead.
39 // Consider using GCC's __read_mostly.
40
41 Mutex* Patching_lock = NULL;
42 Mutex* CompiledMethod_lock = NULL;
43 Monitor* SystemDictionary_lock = NULL;
44 Mutex* ProtectionDomainSet_lock = NULL;
45 Mutex* SharedDictionary_lock = NULL;
46 Mutex* Module_lock = NULL;
47 Mutex* CompiledIC_lock = NULL;
48 Mutex* InlineCacheBuffer_lock = NULL;
49 Mutex* VMStatistic_lock = NULL;
50 Mutex* JNIHandleBlockFreeList_lock = NULL;
51 Mutex* JmethodIdCreation_lock = NULL;
52 Mutex* JfieldIdCreation_lock = NULL;
53 Monitor* JNICritical_lock = NULL;
54 Mutex* JvmtiThreadState_lock = NULL;
55 Monitor* Heap_lock = NULL;
56 Mutex* ExpandHeap_lock = NULL;
57 Mutex* AdapterHandlerLibrary_lock = NULL;
58 Mutex* SignatureHandlerLibrary_lock = NULL;
59 Mutex* VtableStubs_lock = NULL;
60 Mutex* SymbolArena_lock = NULL;
61 Monitor* StringDedupQueue_lock = NULL;
62 Mutex* StringDedupTable_lock = NULL;
217
218 def(MarkStackFreeList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never);
219 def(MarkStackChunkList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never);
220
221 def(MonitoringSupport_lock , PaddedMutex , native , true, Monitor::_safepoint_check_never); // used for serviceability monitoring support
222 }
223 if (UseShenandoahGC) {
224 def(StringDedupQueue_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never);
225 def(StringDedupTable_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never);
226 }
227 def(ParGCRareEvent_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_always);
228 def(CGCPhaseManager_lock , PaddedMonitor, leaf, false, Monitor::_safepoint_check_always);
229 def(CodeCache_lock , PaddedMonitor, special, true, Monitor::_safepoint_check_never);
230 def(RawMonitor_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never);
231 def(OopMapCacheAlloc_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for oop_map_cache allocation.
232
233 def(MetaspaceExpand_lock , PaddedMutex , leaf-1, true, Monitor::_safepoint_check_never);
234 def(ClassLoaderDataGraph_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_always);
235
236 def(Patching_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never); // used for safepointing and code patching.
237 def(OsrList_lock , PaddedMutex , special-1, true, Monitor::_safepoint_check_never);
238 def(CompiledMethod_lock , PaddedMutex , special-1, true, Monitor::_safepoint_check_never);
239 def(Service_lock , PaddedMonitor, special, true, Monitor::_safepoint_check_never); // used for service thread operations
240 def(JmethodIdCreation_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for creating jmethodIDs.
241
242 def(SystemDictionary_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always);
243 def(ProtectionDomainSet_lock , PaddedMutex , leaf-1, true, Monitor::_safepoint_check_never);
244 def(SharedDictionary_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always);
245 def(Module_lock , PaddedMutex , leaf+2, true, Monitor::_safepoint_check_always);
246 def(InlineCacheBuffer_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never);
247 def(VMStatistic_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always);
248 def(ExpandHeap_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // Used during compilation by VM thread
249 def(JNIHandleBlockFreeList_lock , PaddedMutex , leaf-1, true, Monitor::_safepoint_check_never); // handles are used by VM thread
250 def(SignatureHandlerLibrary_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always);
251 def(SymbolArena_lock , PaddedMutex , leaf+2, true, Monitor::_safepoint_check_never);
252 def(ProfilePrint_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // serial profile printing
253 def(ExceptionCache_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // serial profile printing
254 def(Debug1_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never);
255 #ifndef PRODUCT
256 def(FullGCALot_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // a lock to make FullGCALot MT safe
257 #endif
258 def(BeforeExit_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always);
259 def(PerfDataMemAlloc_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for allocating PerfData memory for performance data
260 def(PerfDataManager_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for synchronized access to PerfDataManager resources
261
262 // CMS_modUnionTable_lock leaf
263 // CMS_bitMap_lock leaf 1
264 // CMS_freeList_lock leaf 2
265
266 def(Threads_lock , PaddedMonitor, barrier, true, Monitor::_safepoint_check_always); // Used for safepoint protocol.
267 def(NonJavaThreadsList_lock , PaddedMutex, leaf, true, Monitor::_safepoint_check_never);
268 def(NonJavaThreadsListSync_lock , PaddedMutex, leaf, true, Monitor::_safepoint_check_never);
269
270 def(VMOperationQueue_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_never); // VM_thread allowed to block on these
271 def(VMOperationRequest_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_always);
272 def(RetData_lock , PaddedMutex , nonleaf, false, Monitor::_safepoint_check_always);
273 def(Terminator_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_always);
|