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