Mercurial > hg > truffle
annotate src/share/vm/runtime/vm_operations.hpp @ 671:d0994e5bebce
6822204: volatile fences should prefer lock:addl to actual mfence instructions
Reviewed-by: kvn, phh
author | never |
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date | Thu, 26 Mar 2009 14:31:45 -0700 |
parents | 1ee8caae33af |
children | 96b229c54d1e |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. 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 * | |
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 // The following classes are used for operations | |
26 // initiated by a Java thread but that must | |
27 // take place in the VMThread. | |
28 | |
29 #define VM_OP_ENUM(type) VMOp_##type, | |
30 | |
31 // Note: When new VM_XXX comes up, add 'XXX' to the template table. | |
32 #define VM_OPS_DO(template) \ | |
33 template(Dummy) \ | |
34 template(ThreadStop) \ | |
35 template(ThreadDump) \ | |
36 template(PrintThreads) \ | |
37 template(FindDeadlocks) \ | |
38 template(ForceSafepoint) \ | |
39 template(ForceAsyncSafepoint) \ | |
40 template(Deoptimize) \ | |
41 template(DeoptimizeFrame) \ | |
42 template(DeoptimizeAll) \ | |
43 template(ZombieAll) \ | |
44 template(Verify) \ | |
45 template(PrintJNI) \ | |
46 template(HeapDumper) \ | |
47 template(DeoptimizeTheWorld) \ | |
48 template(GC_HeapInspection) \ | |
49 template(GenCollectFull) \ | |
50 template(GenCollectFullConcurrent) \ | |
51 template(GenCollectForAllocation) \ | |
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52 template(GenCollectForPermanentAllocation) \ |
0 | 53 template(ParallelGCFailedAllocation) \ |
54 template(ParallelGCFailedPermanentAllocation) \ | |
55 template(ParallelGCSystemGC) \ | |
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56 template(CGC_Operation) \ |
0 | 57 template(CMS_Initial_Mark) \ |
58 template(CMS_Final_Remark) \ | |
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59 template(G1CollectFull) \ |
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60 template(G1CollectForAllocation) \ |
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61 template(G1IncCollectionPause) \ |
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62 template(G1PopRegionCollectionPause) \ |
0 | 63 template(EnableBiasedLocking) \ |
64 template(RevokeBias) \ | |
65 template(BulkRevokeBias) \ | |
66 template(PopulateDumpSharedSpace) \ | |
67 template(JNIFunctionTableCopier) \ | |
68 template(RedefineClasses) \ | |
69 template(GetOwnedMonitorInfo) \ | |
70 template(GetObjectMonitorUsage) \ | |
71 template(GetCurrentContendedMonitor) \ | |
72 template(GetStackTrace) \ | |
73 template(GetMultipleStackTraces) \ | |
74 template(GetAllStackTraces) \ | |
75 template(GetThreadListStackTraces) \ | |
76 template(GetFrameCount) \ | |
77 template(GetFrameLocation) \ | |
78 template(ChangeBreakpoints) \ | |
79 template(GetOrSetLocal) \ | |
80 template(GetCurrentLocation) \ | |
81 template(EnterInterpOnlyMode) \ | |
82 template(ChangeSingleStep) \ | |
83 template(HeapWalkOperation) \ | |
84 template(HeapIterateOperation) \ | |
85 template(ReportJavaOutOfMemory) \ | |
86 template(Exit) \ | |
87 | |
88 class VM_Operation: public CHeapObj { | |
89 public: | |
90 enum Mode { | |
91 _safepoint, // blocking, safepoint, vm_op C-heap allocated | |
92 _no_safepoint, // blocking, no safepoint, vm_op C-Heap allocated | |
93 _concurrent, // non-blocking, no safepoint, vm_op C-Heap allocated | |
94 _async_safepoint // non-blocking, safepoint, vm_op C-Heap allocated | |
95 }; | |
96 | |
97 enum VMOp_Type { | |
98 VM_OPS_DO(VM_OP_ENUM) | |
99 VMOp_Terminating | |
100 }; | |
101 | |
102 private: | |
103 Thread* _calling_thread; | |
104 ThreadPriority _priority; | |
105 long _timestamp; | |
106 VM_Operation* _next; | |
107 VM_Operation* _prev; | |
108 | |
109 // The VM operation name array | |
110 static const char* _names[]; | |
111 | |
112 public: | |
113 VM_Operation() { _calling_thread = NULL; _next = NULL; _prev = NULL; } | |
114 virtual ~VM_Operation() {} | |
115 | |
116 // VM operation support (used by VM thread) | |
117 Thread* calling_thread() const { return _calling_thread; } | |
118 ThreadPriority priority() { return _priority; } | |
119 void set_calling_thread(Thread* thread, ThreadPriority priority); | |
120 | |
121 long timestamp() const { return _timestamp; } | |
122 void set_timestamp(long timestamp) { _timestamp = timestamp; } | |
123 | |
124 // Called by VM thread - does in turn invoke doit(). Do not override this | |
125 void evaluate(); | |
126 | |
127 // evaluate() is called by the VMThread and in turn calls doit(). | |
128 // If the thread invoking VMThread::execute((VM_Operation*) is a JavaThread, | |
129 // doit_prologue() is called in that thread before transferring control to | |
130 // the VMThread. | |
131 // If doit_prologue() returns true the VM operation will proceed, and | |
132 // doit_epilogue() will be called by the JavaThread once the VM operation | |
133 // completes. If doit_prologue() returns false the VM operation is cancelled. | |
134 virtual void doit() = 0; | |
135 virtual bool doit_prologue() { return true; }; | |
136 virtual void doit_epilogue() {}; // Note: Not called if mode is: _concurrent | |
137 | |
138 // Type test | |
139 virtual bool is_methodCompiler() const { return false; } | |
140 | |
141 // Linking | |
142 VM_Operation *next() const { return _next; } | |
143 VM_Operation *prev() const { return _prev; } | |
144 void set_next(VM_Operation *next) { _next = next; } | |
145 void set_prev(VM_Operation *prev) { _prev = prev; } | |
146 | |
147 // Configuration. Override these appropriatly in subclasses. | |
148 virtual VMOp_Type type() const = 0; | |
149 virtual Mode evaluation_mode() const { return _safepoint; } | |
150 virtual bool allow_nested_vm_operations() const { return false; } | |
151 virtual bool is_cheap_allocated() const { return false; } | |
152 virtual void oops_do(OopClosure* f) { /* do nothing */ }; | |
153 | |
154 // CAUTION: <don't hang yourself with following rope> | |
155 // If you override these methods, make sure that the evaluation | |
156 // of these methods is race-free and non-blocking, since these | |
157 // methods may be evaluated either by the mutators or by the | |
158 // vm thread, either concurrently with mutators or with the mutators | |
159 // stopped. In other words, taking locks is verboten, and if there | |
160 // are any races in evaluating the conditions, they'd better be benign. | |
161 virtual bool evaluate_at_safepoint() const { | |
162 return evaluation_mode() == _safepoint || | |
163 evaluation_mode() == _async_safepoint; | |
164 } | |
165 virtual bool evaluate_concurrently() const { | |
166 return evaluation_mode() == _concurrent || | |
167 evaluation_mode() == _async_safepoint; | |
168 } | |
169 | |
170 // Debugging | |
171 void print_on_error(outputStream* st) const; | |
172 const char* name() const { return _names[type()]; } | |
173 static const char* name(int type) { | |
174 assert(type >= 0 && type < VMOp_Terminating, "invalid VM operation type"); | |
175 return _names[type]; | |
176 } | |
177 #ifndef PRODUCT | |
178 void print_on(outputStream* st) const { print_on_error(st); } | |
179 #endif | |
180 }; | |
181 | |
182 class VM_ThreadStop: public VM_Operation { | |
183 private: | |
184 oop _thread; // The Thread that the Throwable is thrown against | |
185 oop _throwable; // The Throwable thrown at the target Thread | |
186 public: | |
187 // All oops are passed as JNI handles, since there is no guarantee that a GC might happen before the | |
188 // VM operation is executed. | |
189 VM_ThreadStop(oop thread, oop throwable) { | |
190 _thread = thread; | |
191 _throwable = throwable; | |
192 } | |
193 VMOp_Type type() const { return VMOp_ThreadStop; } | |
194 oop target_thread() const { return _thread; } | |
195 oop throwable() const { return _throwable;} | |
196 void doit(); | |
197 // We deoptimize if top-most frame is compiled - this might require a C2I adapter to be generated | |
198 bool allow_nested_vm_operations() const { return true; } | |
199 Mode evaluation_mode() const { return _async_safepoint; } | |
200 bool is_cheap_allocated() const { return true; } | |
201 | |
202 // GC support | |
203 void oops_do(OopClosure* f) { | |
204 f->do_oop(&_thread); f->do_oop(&_throwable); | |
205 } | |
206 }; | |
207 | |
208 // dummy vm op, evaluated just to force a safepoint | |
209 class VM_ForceSafepoint: public VM_Operation { | |
210 public: | |
211 VM_ForceSafepoint() {} | |
212 void doit() {} | |
213 VMOp_Type type() const { return VMOp_ForceSafepoint; } | |
214 }; | |
215 | |
216 // dummy vm op, evaluated just to force a safepoint | |
217 class VM_ForceAsyncSafepoint: public VM_Operation { | |
218 public: | |
219 VM_ForceAsyncSafepoint() {} | |
220 void doit() {} | |
221 VMOp_Type type() const { return VMOp_ForceAsyncSafepoint; } | |
222 Mode evaluation_mode() const { return _async_safepoint; } | |
223 bool is_cheap_allocated() const { return true; } | |
224 }; | |
225 | |
226 class VM_Deoptimize: public VM_Operation { | |
227 public: | |
228 VM_Deoptimize() {} | |
229 VMOp_Type type() const { return VMOp_Deoptimize; } | |
230 void doit(); | |
231 bool allow_nested_vm_operations() const { return true; } | |
232 }; | |
233 | |
234 class VM_DeoptimizeFrame: public VM_Operation { | |
235 private: | |
236 JavaThread* _thread; | |
237 intptr_t* _id; | |
238 public: | |
239 VM_DeoptimizeFrame(JavaThread* thread, intptr_t* id); | |
240 VMOp_Type type() const { return VMOp_DeoptimizeFrame; } | |
241 void doit(); | |
242 bool allow_nested_vm_operations() const { return true; } | |
243 }; | |
244 | |
245 #ifndef PRODUCT | |
246 class VM_DeoptimizeAll: public VM_Operation { | |
247 private: | |
248 KlassHandle _dependee; | |
249 public: | |
250 VM_DeoptimizeAll() {} | |
251 VMOp_Type type() const { return VMOp_DeoptimizeAll; } | |
252 void doit(); | |
253 bool allow_nested_vm_operations() const { return true; } | |
254 }; | |
255 | |
256 | |
257 class VM_ZombieAll: public VM_Operation { | |
258 public: | |
259 VM_ZombieAll() {} | |
260 VMOp_Type type() const { return VMOp_ZombieAll; } | |
261 void doit(); | |
262 bool allow_nested_vm_operations() const { return true; } | |
263 }; | |
264 #endif // PRODUCT | |
265 | |
266 class VM_Verify: public VM_Operation { | |
267 private: | |
268 KlassHandle _dependee; | |
269 public: | |
270 VM_Verify() {} | |
271 VMOp_Type type() const { return VMOp_Verify; } | |
272 void doit(); | |
273 }; | |
274 | |
275 | |
276 class VM_PrintThreads: public VM_Operation { | |
277 private: | |
278 outputStream* _out; | |
279 bool _print_concurrent_locks; | |
280 public: | |
281 VM_PrintThreads() { _out = tty; _print_concurrent_locks = PrintConcurrentLocks; } | |
282 VM_PrintThreads(outputStream* out, bool print_concurrent_locks) { _out = out; _print_concurrent_locks = print_concurrent_locks; } | |
283 VMOp_Type type() const { return VMOp_PrintThreads; } | |
284 void doit(); | |
285 bool doit_prologue(); | |
286 void doit_epilogue(); | |
287 }; | |
288 | |
289 class VM_PrintJNI: public VM_Operation { | |
290 private: | |
291 outputStream* _out; | |
292 public: | |
293 VM_PrintJNI() { _out = tty; } | |
294 VM_PrintJNI(outputStream* out) { _out = out; } | |
295 VMOp_Type type() const { return VMOp_PrintJNI; } | |
296 void doit(); | |
297 }; | |
298 | |
299 class DeadlockCycle; | |
300 class VM_FindDeadlocks: public VM_Operation { | |
301 private: | |
302 bool _concurrent_locks; | |
303 DeadlockCycle* _deadlocks; | |
304 outputStream* _out; | |
305 | |
306 public: | |
307 VM_FindDeadlocks(bool concurrent_locks) : _concurrent_locks(concurrent_locks), _out(NULL), _deadlocks(NULL) {}; | |
308 VM_FindDeadlocks(outputStream* st) : _concurrent_locks(true), _out(st), _deadlocks(NULL) {}; | |
309 ~VM_FindDeadlocks(); | |
310 | |
311 DeadlockCycle* result() { return _deadlocks; }; | |
312 VMOp_Type type() const { return VMOp_FindDeadlocks; } | |
313 void doit(); | |
314 bool doit_prologue(); | |
315 }; | |
316 | |
317 class ThreadDumpResult; | |
318 class ThreadSnapshot; | |
319 class ThreadConcurrentLocks; | |
320 | |
321 class VM_ThreadDump : public VM_Operation { | |
322 private: | |
323 ThreadDumpResult* _result; | |
324 int _num_threads; | |
325 GrowableArray<instanceHandle>* _threads; | |
326 int _max_depth; | |
327 bool _with_locked_monitors; | |
328 bool _with_locked_synchronizers; | |
329 | |
330 ThreadSnapshot* snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl); | |
331 | |
332 public: | |
333 VM_ThreadDump(ThreadDumpResult* result, | |
334 int max_depth, // -1 indicates entire stack | |
335 bool with_locked_monitors, | |
336 bool with_locked_synchronizers); | |
337 | |
338 VM_ThreadDump(ThreadDumpResult* result, | |
339 GrowableArray<instanceHandle>* threads, | |
340 int num_threads, // -1 indicates entire stack | |
341 int max_depth, | |
342 bool with_locked_monitors, | |
343 bool with_locked_synchronizers); | |
344 | |
345 VMOp_Type type() const { return VMOp_ThreadDump; } | |
346 void doit(); | |
347 bool doit_prologue(); | |
348 void doit_epilogue(); | |
349 }; | |
350 | |
351 | |
352 class VM_Exit: public VM_Operation { | |
353 private: | |
354 int _exit_code; | |
355 static volatile bool _vm_exited; | |
356 static Thread * _shutdown_thread; | |
357 static void wait_if_vm_exited(); | |
358 public: | |
359 VM_Exit(int exit_code) { | |
360 _exit_code = exit_code; | |
361 } | |
362 static int wait_for_threads_in_native_to_block(); | |
363 static int set_vm_exited(); | |
364 static bool vm_exited() { return _vm_exited; } | |
365 static void block_if_vm_exited() { | |
366 if (_vm_exited) { | |
367 wait_if_vm_exited(); | |
368 } | |
369 } | |
370 VMOp_Type type() const { return VMOp_Exit; } | |
371 void doit(); | |
372 }; |