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src/share/vm/runtime/mutexLocker.cpp@da862781b584
src/share/vm/runtime/mutexLocker.cpp
Thu, 21 Nov 2013 12:30:35 -0800
- author
- kvn
- date
- Thu, 21 Nov 2013 12:30:35 -0800
- changeset 6485
- da862781b584
- parent 5732
- b2e698d2276c
- child 6413
- 595c0f60d50d
- permissions
- -rw-r--r--
Merge
1 /*
2 * Copyright (c) 1997, 2013, 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 */
25 #include "precompiled.hpp"
26 #include "runtime/mutexLocker.hpp"
27 #include "runtime/safepoint.hpp"
28 #include "runtime/thread.inline.hpp"
29 #include "runtime/threadLocalStorage.hpp"
30 #include "runtime/vmThread.hpp"
32 // Mutexes used in the VM (see comment in mutexLocker.hpp):
33 //
34 // Note that the following pointers are effectively final -- after having been
35 // set at JVM startup-time, they should never be subsequently mutated.
36 // Instead of using pointers to malloc()ed monitors and mutexes we should consider
37 // eliminating the indirection and using instances instead.
38 // Consider using GCC's __read_mostly.
40 Mutex* Patching_lock = NULL;
41 Monitor* SystemDictionary_lock = NULL;
42 Mutex* PackageTable_lock = NULL;
43 Mutex* CompiledIC_lock = NULL;
44 Mutex* InlineCacheBuffer_lock = NULL;
45 Mutex* VMStatistic_lock = NULL;
46 Mutex* JNIGlobalHandle_lock = NULL;
47 Mutex* JNIHandleBlockFreeList_lock = NULL;
48 Mutex* MemberNameTable_lock = NULL;
49 Mutex* JmethodIdCreation_lock = NULL;
50 Mutex* JfieldIdCreation_lock = NULL;
51 Monitor* JNICritical_lock = NULL;
52 Mutex* JvmtiThreadState_lock = NULL;
53 Monitor* JvmtiPendingEvent_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* SymbolTable_lock = NULL;
60 Mutex* StringTable_lock = NULL;
61 Mutex* CodeCache_lock = NULL;
62 Mutex* MethodData_lock = NULL;
63 Mutex* RetData_lock = NULL;
64 Monitor* VMOperationQueue_lock = NULL;
65 Monitor* VMOperationRequest_lock = NULL;
66 Monitor* Safepoint_lock = NULL;
67 Monitor* SerializePage_lock = NULL;
68 Monitor* Threads_lock = NULL;
69 Monitor* CGC_lock = NULL;
70 Mutex* STS_init_lock = NULL;
71 Monitor* SLT_lock = NULL;
72 Monitor* iCMS_lock = NULL;
73 Monitor* FullGCCount_lock = NULL;
74 Monitor* CMark_lock = NULL;
75 Mutex* CMRegionStack_lock = NULL;
76 Mutex* SATB_Q_FL_lock = NULL;
77 Monitor* SATB_Q_CBL_mon = NULL;
78 Mutex* Shared_SATB_Q_lock = NULL;
79 Mutex* DirtyCardQ_FL_lock = NULL;
80 Monitor* DirtyCardQ_CBL_mon = NULL;
81 Mutex* Shared_DirtyCardQ_lock = NULL;
82 Mutex* ParGCRareEvent_lock = NULL;
83 Mutex* EvacFailureStack_lock = NULL;
84 Mutex* DerivedPointerTableGC_lock = NULL;
85 Mutex* Compile_lock = NULL;
86 Monitor* MethodCompileQueue_lock = NULL;
87 Monitor* CompileThread_lock = NULL;
88 Mutex* CompileTaskAlloc_lock = NULL;
89 Mutex* CompileStatistics_lock = NULL;
90 Mutex* MultiArray_lock = NULL;
91 Monitor* Terminator_lock = NULL;
92 Monitor* BeforeExit_lock = NULL;
93 Monitor* Notify_lock = NULL;
94 Monitor* Interrupt_lock = NULL;
95 Monitor* ProfileVM_lock = NULL;
96 Mutex* ProfilePrint_lock = NULL;
97 Mutex* ExceptionCache_lock = NULL;
98 Monitor* ObjAllocPost_lock = NULL;
99 Mutex* OsrList_lock = NULL;
100 #ifndef PRODUCT
101 Mutex* FullGCALot_lock = NULL;
102 #endif
104 Mutex* Debug1_lock = NULL;
105 Mutex* Debug2_lock = NULL;
106 Mutex* Debug3_lock = NULL;
108 Mutex* tty_lock = NULL;
110 Mutex* RawMonitor_lock = NULL;
111 Mutex* PerfDataMemAlloc_lock = NULL;
112 Mutex* PerfDataManager_lock = NULL;
113 Mutex* OopMapCacheAlloc_lock = NULL;
115 Mutex* FreeList_lock = NULL;
116 Monitor* SecondaryFreeList_lock = NULL;
117 Mutex* OldSets_lock = NULL;
118 Monitor* RootRegionScan_lock = NULL;
119 Mutex* MMUTracker_lock = NULL;
120 Mutex* HotCardCache_lock = NULL;
122 Monitor* GCTaskManager_lock = NULL;
124 Mutex* Management_lock = NULL;
125 Monitor* Service_lock = NULL;
126 Monitor* PeriodicTask_lock = NULL;
128 #ifdef INCLUDE_TRACE
129 Mutex* JfrStacktrace_lock = NULL;
130 Monitor* JfrMsg_lock = NULL;
131 Mutex* JfrBuffer_lock = NULL;
132 Mutex* JfrStream_lock = NULL;
133 Mutex* JfrThreadGroups_lock = NULL;
134 #endif
136 #define MAX_NUM_MUTEX 128
137 static Monitor * _mutex_array[MAX_NUM_MUTEX];
138 static int _num_mutex;
140 #ifdef ASSERT
141 void assert_locked_or_safepoint(const Monitor * lock) {
142 // check if this thread owns the lock (common case)
143 if (IgnoreLockingAssertions) return;
144 assert(lock != NULL, "Need non-NULL lock");
145 if (lock->owned_by_self()) return;
146 if (SafepointSynchronize::is_at_safepoint()) return;
147 if (!Universe::is_fully_initialized()) return;
148 // see if invoker of VM operation owns it
149 VM_Operation* op = VMThread::vm_operation();
150 if (op != NULL && op->calling_thread() == lock->owner()) return;
151 fatal(err_msg("must own lock %s", lock->name()));
152 }
154 // a stronger assertion than the above
155 void assert_lock_strong(const Monitor * lock) {
156 if (IgnoreLockingAssertions) return;
157 assert(lock != NULL, "Need non-NULL lock");
158 if (lock->owned_by_self()) return;
159 fatal(err_msg("must own lock %s", lock->name()));
160 }
161 #endif
163 #define def(var, type, pri, vm_block) { \
164 var = new type(Mutex::pri, #var, vm_block); \
165 assert(_num_mutex < MAX_NUM_MUTEX, \
166 "increase MAX_NUM_MUTEX"); \
167 _mutex_array[_num_mutex++] = var; \
168 }
170 void mutex_init() {
171 def(tty_lock , Mutex , event, true ); // allow to lock in VM
173 def(CGC_lock , Monitor, special, true ); // coordinate between fore- and background GC
174 def(STS_init_lock , Mutex, leaf, true );
175 if (UseConcMarkSweepGC) {
176 def(iCMS_lock , Monitor, special, true ); // CMS incremental mode start/stop notification
177 }
178 if (UseConcMarkSweepGC || UseG1GC) {
179 def(FullGCCount_lock , Monitor, leaf, true ); // in support of ExplicitGCInvokesConcurrent
180 }
181 if (UseG1GC) {
182 def(CMark_lock , Monitor, nonleaf, true ); // coordinate concurrent mark thread
183 def(CMRegionStack_lock , Mutex, leaf, true );
184 def(SATB_Q_FL_lock , Mutex , special, true );
185 def(SATB_Q_CBL_mon , Monitor, nonleaf, true );
186 def(Shared_SATB_Q_lock , Mutex, nonleaf, true );
188 def(DirtyCardQ_FL_lock , Mutex , special, true );
189 def(DirtyCardQ_CBL_mon , Monitor, nonleaf, true );
190 def(Shared_DirtyCardQ_lock , Mutex, nonleaf, true );
192 def(FreeList_lock , Mutex, leaf , true );
193 def(SecondaryFreeList_lock , Monitor, leaf , true );
194 def(OldSets_lock , Mutex , leaf , true );
195 def(RootRegionScan_lock , Monitor, leaf , true );
196 def(MMUTracker_lock , Mutex , leaf , true );
197 def(HotCardCache_lock , Mutex , special , true );
198 def(EvacFailureStack_lock , Mutex , nonleaf , true );
199 }
200 def(ParGCRareEvent_lock , Mutex , leaf , true );
201 def(DerivedPointerTableGC_lock , Mutex, leaf, true );
202 def(CodeCache_lock , Mutex , special, true );
203 def(Interrupt_lock , Monitor, special, true ); // used for interrupt processing
204 def(RawMonitor_lock , Mutex, special, true );
205 def(OopMapCacheAlloc_lock , Mutex, leaf, true ); // used for oop_map_cache allocation.
207 def(Patching_lock , Mutex , special, true ); // used for safepointing and code patching.
208 def(ObjAllocPost_lock , Monitor, special, false);
209 def(Service_lock , Monitor, special, true ); // used for service thread operations
210 def(JmethodIdCreation_lock , Mutex , leaf, true ); // used for creating jmethodIDs.
212 def(SystemDictionary_lock , Monitor, leaf, true ); // lookups done by VM thread
213 def(PackageTable_lock , Mutex , leaf, false);
214 def(InlineCacheBuffer_lock , Mutex , leaf, true );
215 def(VMStatistic_lock , Mutex , leaf, false);
216 def(ExpandHeap_lock , Mutex , leaf, true ); // Used during compilation by VM thread
217 def(JNIHandleBlockFreeList_lock , Mutex , leaf, true ); // handles are used by VM thread
218 def(SignatureHandlerLibrary_lock , Mutex , leaf, false);
219 def(SymbolTable_lock , Mutex , leaf+2, true );
220 def(StringTable_lock , Mutex , leaf, true );
221 def(ProfilePrint_lock , Mutex , leaf, false); // serial profile printing
222 def(ExceptionCache_lock , Mutex , leaf, false); // serial profile printing
223 def(OsrList_lock , Mutex , leaf, true );
224 def(Debug1_lock , Mutex , leaf, true );
225 #ifndef PRODUCT
226 def(FullGCALot_lock , Mutex , leaf, false); // a lock to make FullGCALot MT safe
227 #endif
228 def(BeforeExit_lock , Monitor, leaf, true );
229 def(PerfDataMemAlloc_lock , Mutex , leaf, true ); // used for allocating PerfData memory for performance data
230 def(PerfDataManager_lock , Mutex , leaf, true ); // used for synchronized access to PerfDataManager resources
232 // CMS_modUnionTable_lock leaf
233 // CMS_bitMap_lock leaf + 1
234 // CMS_freeList_lock leaf + 2
236 def(Safepoint_lock , Monitor, safepoint, true ); // locks SnippetCache_lock/Threads_lock
238 def(Threads_lock , Monitor, barrier, true );
240 def(VMOperationQueue_lock , Monitor, nonleaf, true ); // VM_thread allowed to block on these
241 def(VMOperationRequest_lock , Monitor, nonleaf, true );
242 def(RetData_lock , Mutex , nonleaf, false);
243 def(Terminator_lock , Monitor, nonleaf, true );
244 def(VtableStubs_lock , Mutex , nonleaf, true );
245 def(Notify_lock , Monitor, nonleaf, true );
246 def(JNIGlobalHandle_lock , Mutex , nonleaf, true ); // locks JNIHandleBlockFreeList_lock
247 def(JNICritical_lock , Monitor, nonleaf, true ); // used for JNI critical regions
248 def(AdapterHandlerLibrary_lock , Mutex , nonleaf, true);
249 if (UseConcMarkSweepGC) {
250 def(SLT_lock , Monitor, nonleaf, false );
251 // used in CMS GC for locking PLL lock
252 }
253 def(Heap_lock , Monitor, nonleaf+1, false);
254 def(JfieldIdCreation_lock , Mutex , nonleaf+1, true ); // jfieldID, Used in VM_Operation
255 def(MemberNameTable_lock , Mutex , nonleaf+1, false); // Used to protect MemberNameTable
257 def(CompiledIC_lock , Mutex , nonleaf+2, false); // locks VtableStubs_lock, InlineCacheBuffer_lock
258 def(CompileTaskAlloc_lock , Mutex , nonleaf+2, true );
259 def(CompileStatistics_lock , Mutex , nonleaf+2, false);
260 def(MultiArray_lock , Mutex , nonleaf+2, false); // locks SymbolTable_lock
262 def(JvmtiThreadState_lock , Mutex , nonleaf+2, false); // Used by JvmtiThreadState/JvmtiEventController
263 def(JvmtiPendingEvent_lock , Monitor, nonleaf, false); // Used by JvmtiCodeBlobEvents
264 def(Management_lock , Mutex , nonleaf+2, false); // used for JVM management
266 def(Compile_lock , Mutex , nonleaf+3, true );
267 def(MethodData_lock , Mutex , nonleaf+3, false);
269 def(MethodCompileQueue_lock , Monitor, nonleaf+4, true );
270 def(Debug2_lock , Mutex , nonleaf+4, true );
271 def(Debug3_lock , Mutex , nonleaf+4, true );
272 def(ProfileVM_lock , Monitor, special, false); // used for profiling of the VMThread
273 def(CompileThread_lock , Monitor, nonleaf+5, false );
274 def(PeriodicTask_lock , Monitor, nonleaf+5, true);
276 #ifdef INCLUDE_TRACE
277 def(JfrMsg_lock , Monitor, leaf, true);
278 def(JfrBuffer_lock , Mutex, nonleaf+1, true);
279 def(JfrThreadGroups_lock , Mutex, nonleaf+1, true);
280 def(JfrStream_lock , Mutex, nonleaf+2, true);
281 def(JfrStacktrace_lock , Mutex, special, true );
282 #endif
284 }
286 GCMutexLocker::GCMutexLocker(Monitor * mutex) {
287 if (SafepointSynchronize::is_at_safepoint()) {
288 _locked = false;
289 } else {
290 _mutex = mutex;
291 _locked = true;
292 _mutex->lock();
293 }
294 }
296 // Print all mutexes/monitors that are currently owned by a thread; called
297 // by fatal error handler.
298 void print_owned_locks_on_error(outputStream* st) {
299 st->print("VM Mutex/Monitor currently owned by a thread: ");
300 bool none = true;
301 for (int i = 0; i < _num_mutex; i++) {
302 // see if it has an owner
303 if (_mutex_array[i]->owner() != NULL) {
304 if (none) {
305 // print format used by Mutex::print_on_error()
306 st->print_cr(" ([mutex/lock_event])");
307 none = false;
308 }
309 _mutex_array[i]->print_on_error(st);
310 st->cr();
311 }
312 }
313 if (none) st->print_cr("None");
314 }
