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annotate src/share/vm/runtime/vm_operations.hpp @ 12888:4a2acfb16e97
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Reviewed-by: kvn, twisti
author | rbackman |
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date | Fri, 11 Oct 2013 12:06:14 +0200 |
parents | 510fbd28919c |
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0 | 1 /* |
10405 | 2 * Copyright (c) 1997, 2013, 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 #ifndef SHARE_VM_RUNTIME_VM_OPERATIONS_HPP |
26 #define SHARE_VM_RUNTIME_VM_OPERATIONS_HPP | |
27 | |
28 #include "classfile/javaClasses.hpp" | |
29 #include "memory/allocation.hpp" | |
30 #include "oops/oop.hpp" | |
31 #include "runtime/thread.hpp" | |
32 #include "utilities/top.hpp" | |
33 | |
0 | 34 // The following classes are used for operations |
35 // initiated by a Java thread but that must | |
36 // take place in the VMThread. | |
37 | |
38 #define VM_OP_ENUM(type) VMOp_##type, | |
39 | |
40 // Note: When new VM_XXX comes up, add 'XXX' to the template table. | |
41 #define VM_OPS_DO(template) \ | |
42 template(Dummy) \ | |
43 template(ThreadStop) \ | |
44 template(ThreadDump) \ | |
45 template(PrintThreads) \ | |
46 template(FindDeadlocks) \ | |
47 template(ForceSafepoint) \ | |
48 template(ForceAsyncSafepoint) \ | |
49 template(Deoptimize) \ | |
50 template(DeoptimizeFrame) \ | |
51 template(DeoptimizeAll) \ | |
52 template(ZombieAll) \ | |
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53 template(UnlinkSymbols) \ |
0 | 54 template(Verify) \ |
55 template(PrintJNI) \ | |
56 template(HeapDumper) \ | |
57 template(DeoptimizeTheWorld) \ | |
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58 template(CollectForMetadataAllocation) \ |
0 | 59 template(GC_HeapInspection) \ |
60 template(GenCollectFull) \ | |
61 template(GenCollectFullConcurrent) \ | |
62 template(GenCollectForAllocation) \ | |
63 template(ParallelGCFailedAllocation) \ | |
64 template(ParallelGCSystemGC) \ | |
342
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65 template(CGC_Operation) \ |
0 | 66 template(CMS_Initial_Mark) \ |
67 template(CMS_Final_Remark) \ | |
342
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68 template(G1CollectFull) \ |
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69 template(G1CollectForAllocation) \ |
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70 template(G1IncCollectionPause) \ |
0 | 71 template(EnableBiasedLocking) \ |
72 template(RevokeBias) \ | |
73 template(BulkRevokeBias) \ | |
74 template(PopulateDumpSharedSpace) \ | |
75 template(JNIFunctionTableCopier) \ | |
76 template(RedefineClasses) \ | |
77 template(GetOwnedMonitorInfo) \ | |
78 template(GetObjectMonitorUsage) \ | |
79 template(GetCurrentContendedMonitor) \ | |
80 template(GetStackTrace) \ | |
81 template(GetMultipleStackTraces) \ | |
82 template(GetAllStackTraces) \ | |
83 template(GetThreadListStackTraces) \ | |
84 template(GetFrameCount) \ | |
85 template(GetFrameLocation) \ | |
86 template(ChangeBreakpoints) \ | |
87 template(GetOrSetLocal) \ | |
88 template(GetCurrentLocation) \ | |
89 template(EnterInterpOnlyMode) \ | |
90 template(ChangeSingleStep) \ | |
91 template(HeapWalkOperation) \ | |
92 template(HeapIterateOperation) \ | |
93 template(ReportJavaOutOfMemory) \ | |
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94 template(JFRCheckpoint) \ |
0 | 95 template(Exit) \ |
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96 template(LinuxDllLoad) \ |
0 | 97 |
6197 | 98 class VM_Operation: public CHeapObj<mtInternal> { |
0 | 99 public: |
100 enum Mode { | |
101 _safepoint, // blocking, safepoint, vm_op C-heap allocated | |
102 _no_safepoint, // blocking, no safepoint, vm_op C-Heap allocated | |
103 _concurrent, // non-blocking, no safepoint, vm_op C-Heap allocated | |
104 _async_safepoint // non-blocking, safepoint, vm_op C-Heap allocated | |
105 }; | |
106 | |
107 enum VMOp_Type { | |
108 VM_OPS_DO(VM_OP_ENUM) | |
109 VMOp_Terminating | |
110 }; | |
111 | |
112 private: | |
113 Thread* _calling_thread; | |
114 ThreadPriority _priority; | |
115 long _timestamp; | |
116 VM_Operation* _next; | |
117 VM_Operation* _prev; | |
118 | |
119 // The VM operation name array | |
120 static const char* _names[]; | |
121 | |
122 public: | |
123 VM_Operation() { _calling_thread = NULL; _next = NULL; _prev = NULL; } | |
124 virtual ~VM_Operation() {} | |
125 | |
126 // VM operation support (used by VM thread) | |
127 Thread* calling_thread() const { return _calling_thread; } | |
128 ThreadPriority priority() { return _priority; } | |
129 void set_calling_thread(Thread* thread, ThreadPriority priority); | |
130 | |
131 long timestamp() const { return _timestamp; } | |
132 void set_timestamp(long timestamp) { _timestamp = timestamp; } | |
133 | |
134 // Called by VM thread - does in turn invoke doit(). Do not override this | |
135 void evaluate(); | |
136 | |
137 // evaluate() is called by the VMThread and in turn calls doit(). | |
138 // If the thread invoking VMThread::execute((VM_Operation*) is a JavaThread, | |
139 // doit_prologue() is called in that thread before transferring control to | |
140 // the VMThread. | |
141 // If doit_prologue() returns true the VM operation will proceed, and | |
142 // doit_epilogue() will be called by the JavaThread once the VM operation | |
143 // completes. If doit_prologue() returns false the VM operation is cancelled. | |
144 virtual void doit() = 0; | |
145 virtual bool doit_prologue() { return true; }; | |
146 virtual void doit_epilogue() {}; // Note: Not called if mode is: _concurrent | |
147 | |
148 // Type test | |
149 virtual bool is_methodCompiler() const { return false; } | |
150 | |
151 // Linking | |
152 VM_Operation *next() const { return _next; } | |
153 VM_Operation *prev() const { return _prev; } | |
154 void set_next(VM_Operation *next) { _next = next; } | |
155 void set_prev(VM_Operation *prev) { _prev = prev; } | |
156 | |
157 // Configuration. Override these appropriatly in subclasses. | |
158 virtual VMOp_Type type() const = 0; | |
159 virtual Mode evaluation_mode() const { return _safepoint; } | |
160 virtual bool allow_nested_vm_operations() const { return false; } | |
161 virtual bool is_cheap_allocated() const { return false; } | |
162 virtual void oops_do(OopClosure* f) { /* do nothing */ }; | |
163 | |
164 // CAUTION: <don't hang yourself with following rope> | |
165 // If you override these methods, make sure that the evaluation | |
166 // of these methods is race-free and non-blocking, since these | |
167 // methods may be evaluated either by the mutators or by the | |
168 // vm thread, either concurrently with mutators or with the mutators | |
169 // stopped. In other words, taking locks is verboten, and if there | |
170 // are any races in evaluating the conditions, they'd better be benign. | |
171 virtual bool evaluate_at_safepoint() const { | |
172 return evaluation_mode() == _safepoint || | |
173 evaluation_mode() == _async_safepoint; | |
174 } | |
175 virtual bool evaluate_concurrently() const { | |
176 return evaluation_mode() == _concurrent || | |
177 evaluation_mode() == _async_safepoint; | |
178 } | |
179 | |
10405 | 180 static const char* mode_to_string(Mode mode); |
181 | |
0 | 182 // Debugging |
183 void print_on_error(outputStream* st) const; | |
184 const char* name() const { return _names[type()]; } | |
185 static const char* name(int type) { | |
186 assert(type >= 0 && type < VMOp_Terminating, "invalid VM operation type"); | |
187 return _names[type]; | |
188 } | |
189 #ifndef PRODUCT | |
190 void print_on(outputStream* st) const { print_on_error(st); } | |
191 #endif | |
192 }; | |
193 | |
194 class VM_ThreadStop: public VM_Operation { | |
195 private: | |
196 oop _thread; // The Thread that the Throwable is thrown against | |
197 oop _throwable; // The Throwable thrown at the target Thread | |
198 public: | |
199 // All oops are passed as JNI handles, since there is no guarantee that a GC might happen before the | |
200 // VM operation is executed. | |
201 VM_ThreadStop(oop thread, oop throwable) { | |
202 _thread = thread; | |
203 _throwable = throwable; | |
204 } | |
205 VMOp_Type type() const { return VMOp_ThreadStop; } | |
206 oop target_thread() const { return _thread; } | |
207 oop throwable() const { return _throwable;} | |
208 void doit(); | |
209 // We deoptimize if top-most frame is compiled - this might require a C2I adapter to be generated | |
210 bool allow_nested_vm_operations() const { return true; } | |
211 Mode evaluation_mode() const { return _async_safepoint; } | |
212 bool is_cheap_allocated() const { return true; } | |
213 | |
214 // GC support | |
215 void oops_do(OopClosure* f) { | |
216 f->do_oop(&_thread); f->do_oop(&_throwable); | |
217 } | |
218 }; | |
219 | |
220 // dummy vm op, evaluated just to force a safepoint | |
221 class VM_ForceSafepoint: public VM_Operation { | |
222 public: | |
223 VM_ForceSafepoint() {} | |
224 void doit() {} | |
225 VMOp_Type type() const { return VMOp_ForceSafepoint; } | |
226 }; | |
227 | |
228 // dummy vm op, evaluated just to force a safepoint | |
229 class VM_ForceAsyncSafepoint: public VM_Operation { | |
230 public: | |
231 VM_ForceAsyncSafepoint() {} | |
232 void doit() {} | |
233 VMOp_Type type() const { return VMOp_ForceAsyncSafepoint; } | |
234 Mode evaluation_mode() const { return _async_safepoint; } | |
235 bool is_cheap_allocated() const { return true; } | |
236 }; | |
237 | |
238 class VM_Deoptimize: public VM_Operation { | |
239 public: | |
240 VM_Deoptimize() {} | |
241 VMOp_Type type() const { return VMOp_Deoptimize; } | |
242 void doit(); | |
243 bool allow_nested_vm_operations() const { return true; } | |
244 }; | |
245 | |
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246 |
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247 // Deopt helper that can deoptimize frames in threads other than the |
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248 // current thread. Only used through Deoptimization::deoptimize_frame. |
0 | 249 class VM_DeoptimizeFrame: public VM_Operation { |
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250 friend class Deoptimization; |
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251 |
0 | 252 private: |
253 JavaThread* _thread; | |
254 intptr_t* _id; | |
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255 VM_DeoptimizeFrame(JavaThread* thread, intptr_t* id); |
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256 |
0 | 257 public: |
258 VMOp_Type type() const { return VMOp_DeoptimizeFrame; } | |
259 void doit(); | |
260 bool allow_nested_vm_operations() const { return true; } | |
261 }; | |
262 | |
263 #ifndef PRODUCT | |
264 class VM_DeoptimizeAll: public VM_Operation { | |
265 private: | |
266 KlassHandle _dependee; | |
267 public: | |
268 VM_DeoptimizeAll() {} | |
269 VMOp_Type type() const { return VMOp_DeoptimizeAll; } | |
270 void doit(); | |
271 bool allow_nested_vm_operations() const { return true; } | |
272 }; | |
273 | |
274 | |
275 class VM_ZombieAll: public VM_Operation { | |
276 public: | |
277 VM_ZombieAll() {} | |
278 VMOp_Type type() const { return VMOp_ZombieAll; } | |
279 void doit(); | |
280 bool allow_nested_vm_operations() const { return true; } | |
281 }; | |
282 #endif // PRODUCT | |
283 | |
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284 class VM_UnlinkSymbols: public VM_Operation { |
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285 public: |
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286 VM_UnlinkSymbols() {} |
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287 VMOp_Type type() const { return VMOp_UnlinkSymbols; } |
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288 void doit(); |
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289 bool allow_nested_vm_operations() const { return true; } |
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290 }; |
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291 |
0 | 292 class VM_Verify: public VM_Operation { |
293 private: | |
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294 bool _silent; |
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296 VM_Verify(bool silent = VerifySilently) : _silent(silent) {} |
0 | 297 VMOp_Type type() const { return VMOp_Verify; } |
298 void doit(); | |
299 }; | |
300 | |
301 | |
302 class VM_PrintThreads: public VM_Operation { | |
303 private: | |
304 outputStream* _out; | |
305 bool _print_concurrent_locks; | |
306 public: | |
307 VM_PrintThreads() { _out = tty; _print_concurrent_locks = PrintConcurrentLocks; } | |
308 VM_PrintThreads(outputStream* out, bool print_concurrent_locks) { _out = out; _print_concurrent_locks = print_concurrent_locks; } | |
309 VMOp_Type type() const { return VMOp_PrintThreads; } | |
310 void doit(); | |
311 bool doit_prologue(); | |
312 void doit_epilogue(); | |
313 }; | |
314 | |
315 class VM_PrintJNI: public VM_Operation { | |
316 private: | |
317 outputStream* _out; | |
318 public: | |
319 VM_PrintJNI() { _out = tty; } | |
320 VM_PrintJNI(outputStream* out) { _out = out; } | |
321 VMOp_Type type() const { return VMOp_PrintJNI; } | |
322 void doit(); | |
323 }; | |
324 | |
325 class DeadlockCycle; | |
326 class VM_FindDeadlocks: public VM_Operation { | |
327 private: | |
328 bool _concurrent_locks; | |
329 DeadlockCycle* _deadlocks; | |
330 outputStream* _out; | |
331 | |
332 public: | |
333 VM_FindDeadlocks(bool concurrent_locks) : _concurrent_locks(concurrent_locks), _out(NULL), _deadlocks(NULL) {}; | |
334 VM_FindDeadlocks(outputStream* st) : _concurrent_locks(true), _out(st), _deadlocks(NULL) {}; | |
335 ~VM_FindDeadlocks(); | |
336 | |
337 DeadlockCycle* result() { return _deadlocks; }; | |
338 VMOp_Type type() const { return VMOp_FindDeadlocks; } | |
339 void doit(); | |
340 bool doit_prologue(); | |
341 }; | |
342 | |
343 class ThreadDumpResult; | |
344 class ThreadSnapshot; | |
345 class ThreadConcurrentLocks; | |
346 | |
347 class VM_ThreadDump : public VM_Operation { | |
348 private: | |
349 ThreadDumpResult* _result; | |
350 int _num_threads; | |
351 GrowableArray<instanceHandle>* _threads; | |
352 int _max_depth; | |
353 bool _with_locked_monitors; | |
354 bool _with_locked_synchronizers; | |
355 | |
356 ThreadSnapshot* snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl); | |
357 | |
358 public: | |
359 VM_ThreadDump(ThreadDumpResult* result, | |
360 int max_depth, // -1 indicates entire stack | |
361 bool with_locked_monitors, | |
362 bool with_locked_synchronizers); | |
363 | |
364 VM_ThreadDump(ThreadDumpResult* result, | |
365 GrowableArray<instanceHandle>* threads, | |
366 int num_threads, // -1 indicates entire stack | |
367 int max_depth, | |
368 bool with_locked_monitors, | |
369 bool with_locked_synchronizers); | |
370 | |
371 VMOp_Type type() const { return VMOp_ThreadDump; } | |
372 void doit(); | |
373 bool doit_prologue(); | |
374 void doit_epilogue(); | |
375 }; | |
376 | |
377 | |
378 class VM_Exit: public VM_Operation { | |
379 private: | |
380 int _exit_code; | |
381 static volatile bool _vm_exited; | |
382 static Thread * _shutdown_thread; | |
383 static void wait_if_vm_exited(); | |
384 public: | |
385 VM_Exit(int exit_code) { | |
386 _exit_code = exit_code; | |
387 } | |
388 static int wait_for_threads_in_native_to_block(); | |
389 static int set_vm_exited(); | |
390 static bool vm_exited() { return _vm_exited; } | |
391 static void block_if_vm_exited() { | |
392 if (_vm_exited) { | |
393 wait_if_vm_exited(); | |
394 } | |
395 } | |
396 VMOp_Type type() const { return VMOp_Exit; } | |
397 void doit(); | |
398 }; | |
1972 | 399 |
400 #endif // SHARE_VM_RUNTIME_VM_OPERATIONS_HPP |