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comparison src/share/vm/runtime/mutexLocker.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_mutexLocker.cpp.incl"
27
28 // Mutexes used in the VM (see comment in mutexLocker.hpp):
29 //
30 // Note that the following pointers are effectively final -- after having been
31 // set at JVM startup-time, they should never be subsequently mutated.
32 // Instead of using pointers to malloc()ed monitors and mutexes we should consider
33 // eliminating the indirection and using instances instead.
34 // Consider using GCC's __read_mostly.
35
36 Mutex* Patching_lock = NULL;
37 Monitor* SystemDictionary_lock = NULL;
38 Mutex* PackageTable_lock = NULL;
39 Mutex* CompiledIC_lock = NULL;
40 Mutex* InlineCacheBuffer_lock = NULL;
41 Mutex* VMStatistic_lock = NULL;
42 Mutex* JNIGlobalHandle_lock = NULL;
43 Mutex* JNIHandleBlockFreeList_lock = NULL;
44 Mutex* JNICachedItableIndex_lock = NULL;
45 Mutex* JmethodIdCreation_lock = NULL;
46 Mutex* JfieldIdCreation_lock = NULL;
47 Monitor* JNICritical_lock = NULL;
48 Mutex* JvmtiThreadState_lock = NULL;
49 Monitor* JvmtiPendingEvent_lock = NULL;
50 Mutex* Heap_lock = NULL;
51 Mutex* ExpandHeap_lock = NULL;
52 Mutex* AdapterHandlerLibrary_lock = NULL;
53 Mutex* SignatureHandlerLibrary_lock = NULL;
54 Mutex* VtableStubs_lock = NULL;
55 Mutex* SymbolTable_lock = NULL;
56 Mutex* StringTable_lock = NULL;
57 Mutex* CodeCache_lock = NULL;
58 Mutex* MethodData_lock = NULL;
59 Mutex* RetData_lock = NULL;
60 Monitor* VMOperationQueue_lock = NULL;
61 Monitor* VMOperationRequest_lock = NULL;
62 Monitor* Safepoint_lock = NULL;
63 Monitor* SerializePage_lock = NULL;
64 Monitor* Threads_lock = NULL;
65 Monitor* CGC_lock = NULL;
66 Mutex* STS_init_lock = NULL;
67 Monitor* SLT_lock = NULL;
68 Monitor* iCMS_lock = NULL;
69 Monitor* FullGCCount_lock = NULL;
70 Mutex* ParGCRareEvent_lock = NULL;
71 Mutex* DerivedPointerTableGC_lock = NULL;
72 Mutex* Compile_lock = NULL;
73 Monitor* MethodCompileQueue_lock = NULL;
74 #ifdef TIERED
75 Monitor* C1_lock = NULL;
76 #endif // TIERED
77 Monitor* CompileThread_lock = NULL;
78 Mutex* CompileTaskAlloc_lock = NULL;
79 Mutex* CompileStatistics_lock = NULL;
80 Mutex* MultiArray_lock = NULL;
81 Monitor* Terminator_lock = NULL;
82 Monitor* BeforeExit_lock = NULL;
83 Monitor* Notify_lock = NULL;
84 Monitor* Interrupt_lock = NULL;
85 Monitor* ProfileVM_lock = NULL;
86 Mutex* ProfilePrint_lock = NULL;
87 Mutex* ExceptionCache_lock = NULL;
88 Monitor* ObjAllocPost_lock = NULL;
89 Mutex* OsrList_lock = NULL;
90 #ifndef PRODUCT
91 Mutex* FullGCALot_lock = NULL;
92 #endif
93
94 Mutex* Debug1_lock = NULL;
95 Mutex* Debug2_lock = NULL;
96 Mutex* Debug3_lock = NULL;
97
98 Mutex* tty_lock = NULL;
99
100 Mutex* RawMonitor_lock = NULL;
101 Mutex* PerfDataMemAlloc_lock = NULL;
102 Mutex* PerfDataManager_lock = NULL;
103 Mutex* OopMapCacheAlloc_lock = NULL;
104
105 Monitor* GCTaskManager_lock = NULL;
106
107 Mutex* Management_lock = NULL;
108 Monitor* LowMemory_lock = NULL;
109
110 #define MAX_NUM_MUTEX 128
111 static Monitor * _mutex_array[MAX_NUM_MUTEX];
112 static int _num_mutex;
113
114 #ifdef ASSERT
115 void assert_locked_or_safepoint(const Monitor * lock) {
116 // check if this thread owns the lock (common case)
117 if (IgnoreLockingAssertions) return;
118 assert(lock != NULL, "Need non-NULL lock");
119 if (lock->owned_by_self()) return;
120 if (SafepointSynchronize::is_at_safepoint()) return;
121 if (!Universe::is_fully_initialized()) return;
122 // see if invoker of VM operation owns it
123 VM_Operation* op = VMThread::vm_operation();
124 if (op != NULL && op->calling_thread() == lock->owner()) return;
125 fatal1("must own lock %s", lock->name());
126 }
127
128 // a stronger assertion than the above
129 void assert_lock_strong(const Monitor * lock) {
130 if (IgnoreLockingAssertions) return;
131 assert(lock != NULL, "Need non-NULL lock");
132 if (lock->owned_by_self()) return;
133 fatal1("must own lock %s", lock->name());
134 }
135 #endif
136
137 #define def(var, type, pri, vm_block) { \
138 var = new type(Mutex::pri, #var, vm_block); \
139 assert(_num_mutex < MAX_NUM_MUTEX, \
140 "increase MAX_NUM_MUTEX"); \
141 _mutex_array[_num_mutex++] = var; \
142 }
143
144 void mutex_init() {
145 def(tty_lock , Mutex , event, true ); // allow to lock in VM
146
147 def(CGC_lock , Monitor, special, true ); // coordinate between fore- and background GC
148 def(STS_init_lock , Mutex, leaf, true );
149 if (UseConcMarkSweepGC) {
150 def(iCMS_lock , Monitor, special, true ); // CMS incremental mode start/stop notification
151 def(FullGCCount_lock , Monitor, leaf, true ); // in support of ExplicitGCInvokesConcurrent
152 }
153 def(ParGCRareEvent_lock , Mutex , leaf , true );
154 def(DerivedPointerTableGC_lock , Mutex, leaf, true );
155 def(CodeCache_lock , Mutex , special, true );
156 def(Interrupt_lock , Monitor, special, true ); // used for interrupt processing
157 def(RawMonitor_lock , Mutex, special, true );
158 def(OopMapCacheAlloc_lock , Mutex, leaf, true ); // used for oop_map_cache allocation.
159
160 def(Patching_lock , Mutex , special, true ); // used for safepointing and code patching.
161 def(ObjAllocPost_lock , Monitor, special, false);
162 def(LowMemory_lock , Monitor, special, true ); // used for low memory detection
163 def(JmethodIdCreation_lock , Mutex , leaf, true ); // used for creating jmethodIDs.
164
165 def(SystemDictionary_lock , Monitor, leaf, true ); // lookups done by VM thread
166 def(PackageTable_lock , Mutex , leaf, false);
167 def(InlineCacheBuffer_lock , Mutex , leaf, true );
168 def(VMStatistic_lock , Mutex , leaf, false);
169 def(ExpandHeap_lock , Mutex , leaf, true ); // Used during compilation by VM thread
170 def(JNIHandleBlockFreeList_lock , Mutex , leaf, true ); // handles are used by VM thread
171 def(SignatureHandlerLibrary_lock , Mutex , leaf, false);
172 def(SymbolTable_lock , Mutex , leaf, true );
173 def(StringTable_lock , Mutex , leaf, true );
174 def(ProfilePrint_lock , Mutex , leaf, false); // serial profile printing
175 def(ExceptionCache_lock , Mutex , leaf, false); // serial profile printing
176 def(OsrList_lock , Mutex , leaf, true );
177 def(Debug1_lock , Mutex , leaf, true );
178 #ifndef PRODUCT
179 def(FullGCALot_lock , Mutex , leaf, false); // a lock to make FullGCALot MT safe
180 #endif
181 def(BeforeExit_lock , Monitor, leaf, true );
182 def(PerfDataMemAlloc_lock , Mutex , leaf, true ); // used for allocating PerfData memory for performance data
183 def(PerfDataManager_lock , Mutex , leaf, true ); // used for synchronized access to PerfDataManager resources
184
185 // CMS_modUnionTable_lock leaf
186 // CMS_bitMap_lock leaf + 1
187 // CMS_freeList_lock leaf + 2
188
189 def(Safepoint_lock , Monitor, safepoint, true ); // locks SnippetCache_lock/Threads_lock
190
191 if (!UseMembar) {
192 def(SerializePage_lock , Monitor, leaf, true );
193 }
194
195 def(Threads_lock , Monitor, barrier, true );
196
197 def(VMOperationQueue_lock , Monitor, nonleaf, true ); // VM_thread allowed to block on these
198 def(VMOperationRequest_lock , Monitor, nonleaf, true );
199 def(RetData_lock , Mutex , nonleaf, false);
200 def(Terminator_lock , Monitor, nonleaf, true );
201 def(VtableStubs_lock , Mutex , nonleaf, true );
202 def(Notify_lock , Monitor, nonleaf, true );
203 def(JNIGlobalHandle_lock , Mutex , nonleaf, true ); // locks JNIHandleBlockFreeList_lock
204 def(JNICritical_lock , Monitor, nonleaf, true ); // used for JNI critical regions
205 def(AdapterHandlerLibrary_lock , Mutex , nonleaf, true);
206 if (UseConcMarkSweepGC) {
207 def(SLT_lock , Monitor, nonleaf, false );
208 // used in CMS GC for locking PLL lock
209 }
210 def(Heap_lock , Mutex , nonleaf+1, false);
211 def(JfieldIdCreation_lock , Mutex , nonleaf+1, true ); // jfieldID, Used in VM_Operation
212 def(JNICachedItableIndex_lock , Mutex , nonleaf+1, false); // Used to cache an itable index during JNI invoke
213
214 def(CompiledIC_lock , Mutex , nonleaf+2, false); // locks VtableStubs_lock, InlineCacheBuffer_lock
215 def(CompileTaskAlloc_lock , Mutex , nonleaf+2, true );
216 def(CompileStatistics_lock , Mutex , nonleaf+2, false);
217 def(MultiArray_lock , Mutex , nonleaf+2, false); // locks SymbolTable_lock
218
219 def(JvmtiThreadState_lock , Mutex , nonleaf+2, false); // Used by JvmtiThreadState/JvmtiEventController
220 def(JvmtiPendingEvent_lock , Monitor, nonleaf, false); // Used by JvmtiCodeBlobEvents
221 def(Management_lock , Mutex , nonleaf+2, false); // used for JVM management
222
223 def(Compile_lock , Mutex , nonleaf+3, true );
224 def(MethodData_lock , Mutex , nonleaf+3, false);
225
226 def(MethodCompileQueue_lock , Monitor, nonleaf+4, true );
227 def(Debug2_lock , Mutex , nonleaf+4, true );
228 def(Debug3_lock , Mutex , nonleaf+4, true );
229 def(ProfileVM_lock , Monitor, nonleaf+4, false); // used for profiling of the VMThread
230 def(CompileThread_lock , Monitor, nonleaf+5, false );
231 #ifdef TIERED
232 def(C1_lock , Monitor, nonleaf+5, false );
233 #endif // TIERED
234
235
236 }
237
238 GCMutexLocker::GCMutexLocker(Monitor * mutex) {
239 if (SafepointSynchronize::is_at_safepoint()) {
240 _locked = false;
241 } else {
242 _mutex = mutex;
243 _locked = true;
244 _mutex->lock();
245 }
246 }
247
248 // Print all mutexes/monitors that are currently owned by a thread; called
249 // by fatal error handler.
250 void print_owned_locks_on_error(outputStream* st) {
251 st->print("VM Mutex/Monitor currently owned by a thread: ");
252 bool none = true;
253 for (int i = 0; i < _num_mutex; i++) {
254 // see if it has an owner
255 if (_mutex_array[i]->owner() != NULL) {
256 if (none) {
257 // print format used by Mutex::print_on_error()
258 st->print_cr(" ([mutex/lock_event])");
259 none = false;
260 }
261 _mutex_array[i]->print_on_error(st);
262 st->cr();
263 }
264 }
265 if (none) st->print_cr("None");
266 }