Mercurial > hg > truffle
annotate src/share/vm/runtime/mutexLocker.cpp @ 4737:75c0a73eee98
7102776: Pack instanceKlass boolean fields into single u1 field
Summary: Reduce class runtime memory usage by packing 4 instanceKlass boolean fields into single u1 field. Save 4-byte for each loaded class.
Reviewed-by: dholmes, bobv, phh, twisti, never, coleenp
Contributed-by: Jiangli Zhou <jiangli.zhou@oracle.com>
author | coleenp |
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date | Thu, 17 Nov 2011 12:53:59 -0500 |
parents | f08d439fab8c |
children | 94ec88ca68e2 eff609af17d7 |
rev | line source |
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0 | 1 /* |
2152 | 2 * Copyright (c) 1997, 2011, 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 | |
1972 | 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 | |
3960 | 39 #ifdef TARGET_OS_FAMILY_bsd |
40 # include "thread_bsd.inline.hpp" | |
41 #endif | |
0 | 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 | |
51 Mutex* Patching_lock = NULL; | |
52 Monitor* SystemDictionary_lock = NULL; | |
53 Mutex* PackageTable_lock = NULL; | |
54 Mutex* CompiledIC_lock = NULL; | |
55 Mutex* InlineCacheBuffer_lock = NULL; | |
56 Mutex* VMStatistic_lock = NULL; | |
57 Mutex* JNIGlobalHandle_lock = NULL; | |
58 Mutex* JNIHandleBlockFreeList_lock = NULL; | |
59 Mutex* JNICachedItableIndex_lock = NULL; | |
60 Mutex* JmethodIdCreation_lock = NULL; | |
61 Mutex* JfieldIdCreation_lock = NULL; | |
62 Monitor* JNICritical_lock = NULL; | |
63 Mutex* JvmtiThreadState_lock = NULL; | |
64 Monitor* JvmtiPendingEvent_lock = NULL; | |
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65 Monitor* Heap_lock = NULL; |
0 | 66 Mutex* ExpandHeap_lock = NULL; |
67 Mutex* AdapterHandlerLibrary_lock = NULL; | |
68 Mutex* SignatureHandlerLibrary_lock = NULL; | |
69 Mutex* VtableStubs_lock = NULL; | |
70 Mutex* SymbolTable_lock = NULL; | |
71 Mutex* StringTable_lock = NULL; | |
72 Mutex* CodeCache_lock = NULL; | |
73 Mutex* MethodData_lock = NULL; | |
74 Mutex* RetData_lock = NULL; | |
75 Monitor* VMOperationQueue_lock = NULL; | |
76 Monitor* VMOperationRequest_lock = NULL; | |
77 Monitor* Safepoint_lock = NULL; | |
78 Monitor* SerializePage_lock = NULL; | |
79 Monitor* Threads_lock = NULL; | |
80 Monitor* CGC_lock = NULL; | |
81 Mutex* STS_init_lock = NULL; | |
82 Monitor* SLT_lock = NULL; | |
83 Monitor* iCMS_lock = NULL; | |
84 Monitor* FullGCCount_lock = NULL; | |
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85 Monitor* CMark_lock = NULL; |
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86 Mutex* CMRegionStack_lock = NULL; |
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87 Mutex* SATB_Q_FL_lock = NULL; |
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88 Monitor* SATB_Q_CBL_mon = NULL; |
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89 Mutex* Shared_SATB_Q_lock = NULL; |
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90 Mutex* DirtyCardQ_FL_lock = NULL; |
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91 Monitor* DirtyCardQ_CBL_mon = NULL; |
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92 Mutex* Shared_DirtyCardQ_lock = NULL; |
0 | 93 Mutex* ParGCRareEvent_lock = NULL; |
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94 Mutex* EvacFailureStack_lock = NULL; |
0 | 95 Mutex* DerivedPointerTableGC_lock = NULL; |
96 Mutex* Compile_lock = NULL; | |
97 Monitor* MethodCompileQueue_lock = NULL; | |
98 Monitor* CompileThread_lock = NULL; | |
99 Mutex* CompileTaskAlloc_lock = NULL; | |
100 Mutex* CompileStatistics_lock = NULL; | |
101 Mutex* MultiArray_lock = NULL; | |
102 Monitor* Terminator_lock = NULL; | |
103 Monitor* BeforeExit_lock = NULL; | |
104 Monitor* Notify_lock = NULL; | |
105 Monitor* Interrupt_lock = NULL; | |
106 Monitor* ProfileVM_lock = NULL; | |
107 Mutex* ProfilePrint_lock = NULL; | |
108 Mutex* ExceptionCache_lock = NULL; | |
109 Monitor* ObjAllocPost_lock = NULL; | |
110 Mutex* OsrList_lock = NULL; | |
111 #ifndef PRODUCT | |
112 Mutex* FullGCALot_lock = NULL; | |
113 #endif | |
114 | |
115 Mutex* Debug1_lock = NULL; | |
116 Mutex* Debug2_lock = NULL; | |
117 Mutex* Debug3_lock = NULL; | |
118 | |
119 Mutex* tty_lock = NULL; | |
120 | |
121 Mutex* RawMonitor_lock = NULL; | |
122 Mutex* PerfDataMemAlloc_lock = NULL; | |
123 Mutex* PerfDataManager_lock = NULL; | |
124 Mutex* OopMapCacheAlloc_lock = NULL; | |
125 | |
2152 | 126 Mutex* FreeList_lock = NULL; |
127 Monitor* SecondaryFreeList_lock = NULL; | |
128 Mutex* OldSets_lock = NULL; | |
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129 Mutex* MMUTracker_lock = NULL; |
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130 Mutex* HotCardCache_lock = NULL; |
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131 |
0 | 132 Monitor* GCTaskManager_lock = NULL; |
133 | |
134 Mutex* Management_lock = NULL; | |
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135 Monitor* Service_lock = NULL; |
0 | 136 |
137 #define MAX_NUM_MUTEX 128 | |
138 static Monitor * _mutex_array[MAX_NUM_MUTEX]; | |
139 static int _num_mutex; | |
140 | |
141 #ifdef ASSERT | |
142 void assert_locked_or_safepoint(const Monitor * lock) { | |
143 // check if this thread owns the lock (common case) | |
144 if (IgnoreLockingAssertions) return; | |
145 assert(lock != NULL, "Need non-NULL lock"); | |
146 if (lock->owned_by_self()) return; | |
147 if (SafepointSynchronize::is_at_safepoint()) return; | |
148 if (!Universe::is_fully_initialized()) return; | |
149 // see if invoker of VM operation owns it | |
150 VM_Operation* op = VMThread::vm_operation(); | |
151 if (op != NULL && op->calling_thread() == lock->owner()) return; | |
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152 fatal(err_msg("must own lock %s", lock->name())); |
0 | 153 } |
154 | |
155 // a stronger assertion than the above | |
156 void assert_lock_strong(const Monitor * lock) { | |
157 if (IgnoreLockingAssertions) return; | |
158 assert(lock != NULL, "Need non-NULL lock"); | |
159 if (lock->owned_by_self()) return; | |
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160 fatal(err_msg("must own lock %s", lock->name())); |
0 | 161 } |
162 #endif | |
163 | |
164 #define def(var, type, pri, vm_block) { \ | |
165 var = new type(Mutex::pri, #var, vm_block); \ | |
166 assert(_num_mutex < MAX_NUM_MUTEX, \ | |
167 "increase MAX_NUM_MUTEX"); \ | |
168 _mutex_array[_num_mutex++] = var; \ | |
169 } | |
170 | |
171 void mutex_init() { | |
172 def(tty_lock , Mutex , event, true ); // allow to lock in VM | |
173 | |
174 def(CGC_lock , Monitor, special, true ); // coordinate between fore- and background GC | |
175 def(STS_init_lock , Mutex, leaf, true ); | |
176 if (UseConcMarkSweepGC) { | |
177 def(iCMS_lock , Monitor, special, true ); // CMS incremental mode start/stop notification | |
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178 } |
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179 if (UseConcMarkSweepGC || UseG1GC) { |
0 | 180 def(FullGCCount_lock , Monitor, leaf, true ); // in support of ExplicitGCInvokesConcurrent |
181 } | |
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182 if (UseG1GC) { |
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183 def(CMark_lock , Monitor, nonleaf, true ); // coordinate concurrent mark thread |
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184 def(CMRegionStack_lock , Mutex, leaf, true ); |
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185 def(SATB_Q_FL_lock , Mutex , special, true ); |
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186 def(SATB_Q_CBL_mon , Monitor, nonleaf, true ); |
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187 def(Shared_SATB_Q_lock , Mutex, nonleaf, true ); |
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188 |
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189 def(DirtyCardQ_FL_lock , Mutex , special, true ); |
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190 def(DirtyCardQ_CBL_mon , Monitor, nonleaf, true ); |
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191 def(Shared_DirtyCardQ_lock , Mutex, nonleaf, true ); |
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192 |
2152 | 193 def(FreeList_lock , Mutex, leaf , true ); |
194 def(SecondaryFreeList_lock , Monitor, leaf , true ); | |
195 def(OldSets_lock , Mutex , leaf , true ); | |
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196 def(MMUTracker_lock , Mutex , leaf , true ); |
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197 def(HotCardCache_lock , Mutex , special , true ); |
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198 def(EvacFailureStack_lock , Mutex , nonleaf , true ); |
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199 } |
0 | 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. | |
206 | |
207 def(Patching_lock , Mutex , special, true ); // used for safepointing and code patching. | |
208 def(ObjAllocPost_lock , Monitor, special, false); | |
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209 def(Service_lock , Monitor, special, true ); // used for service thread operations |
0 | 210 def(JmethodIdCreation_lock , Mutex , leaf, true ); // used for creating jmethodIDs. |
211 | |
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, 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 | |
231 | |
232 // CMS_modUnionTable_lock leaf | |
233 // CMS_bitMap_lock leaf + 1 | |
234 // CMS_freeList_lock leaf + 2 | |
235 | |
236 def(Safepoint_lock , Monitor, safepoint, true ); // locks SnippetCache_lock/Threads_lock | |
237 | |
238 def(Threads_lock , Monitor, barrier, true ); | |
239 | |
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 } | |
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253 def(Heap_lock , Monitor, nonleaf+1, false); |
0 | 254 def(JfieldIdCreation_lock , Mutex , nonleaf+1, true ); // jfieldID, Used in VM_Operation |
255 def(JNICachedItableIndex_lock , Mutex , nonleaf+1, false); // Used to cache an itable index during JNI invoke | |
256 | |
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 | |
261 | |
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 | |
265 | |
266 def(Compile_lock , Mutex , nonleaf+3, true ); | |
267 def(MethodData_lock , Mutex , nonleaf+3, false); | |
268 | |
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, nonleaf+4, false); // used for profiling of the VMThread | |
273 def(CompileThread_lock , Monitor, nonleaf+5, false ); | |
274 } | |
275 | |
276 GCMutexLocker::GCMutexLocker(Monitor * mutex) { | |
277 if (SafepointSynchronize::is_at_safepoint()) { | |
278 _locked = false; | |
279 } else { | |
280 _mutex = mutex; | |
281 _locked = true; | |
282 _mutex->lock(); | |
283 } | |
284 } | |
285 | |
286 // Print all mutexes/monitors that are currently owned by a thread; called | |
287 // by fatal error handler. | |
288 void print_owned_locks_on_error(outputStream* st) { | |
289 st->print("VM Mutex/Monitor currently owned by a thread: "); | |
290 bool none = true; | |
291 for (int i = 0; i < _num_mutex; i++) { | |
292 // see if it has an owner | |
293 if (_mutex_array[i]->owner() != NULL) { | |
294 if (none) { | |
295 // print format used by Mutex::print_on_error() | |
296 st->print_cr(" ([mutex/lock_event])"); | |
297 none = false; | |
298 } | |
299 _mutex_array[i]->print_on_error(st); | |
300 st->cr(); | |
301 } | |
302 } | |
303 if (none) st->print_cr("None"); | |
304 } |