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src/share/vm/runtime/vm_operations.hpp@96b229c54d1e
src/share/vm/runtime/vm_operations.hpp
Wed, 25 Mar 2009 13:10:54 -0700
- author
- apetrusenko
- date
- Wed, 25 Mar 2009 13:10:54 -0700
- changeset 1112
- 96b229c54d1e
- parent 791
- 1ee8caae33af
- child 1279
- bd02caa94611
- permissions
- -rw-r--r--
6543938: G1: remove the concept of popularity
Reviewed-by: iveresov, tonyp
1 /*
2 * Copyright 1997-2008 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 */
25 // The following classes are used for operations
26 // initiated by a Java thread but that must
27 // take place in the VMThread.
29 #define VM_OP_ENUM(type) VMOp_##type,
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(GenCollectForPermanentAllocation) \
53 template(ParallelGCFailedAllocation) \
54 template(ParallelGCFailedPermanentAllocation) \
55 template(ParallelGCSystemGC) \
56 template(CGC_Operation) \
57 template(CMS_Initial_Mark) \
58 template(CMS_Final_Remark) \
59 template(G1CollectFull) \
60 template(G1CollectForAllocation) \
61 template(G1IncCollectionPause) \
62 template(EnableBiasedLocking) \
63 template(RevokeBias) \
64 template(BulkRevokeBias) \
65 template(PopulateDumpSharedSpace) \
66 template(JNIFunctionTableCopier) \
67 template(RedefineClasses) \
68 template(GetOwnedMonitorInfo) \
69 template(GetObjectMonitorUsage) \
70 template(GetCurrentContendedMonitor) \
71 template(GetStackTrace) \
72 template(GetMultipleStackTraces) \
73 template(GetAllStackTraces) \
74 template(GetThreadListStackTraces) \
75 template(GetFrameCount) \
76 template(GetFrameLocation) \
77 template(ChangeBreakpoints) \
78 template(GetOrSetLocal) \
79 template(GetCurrentLocation) \
80 template(EnterInterpOnlyMode) \
81 template(ChangeSingleStep) \
82 template(HeapWalkOperation) \
83 template(HeapIterateOperation) \
84 template(ReportJavaOutOfMemory) \
85 template(Exit) \
87 class VM_Operation: public CHeapObj {
88 public:
89 enum Mode {
90 _safepoint, // blocking, safepoint, vm_op C-heap allocated
91 _no_safepoint, // blocking, no safepoint, vm_op C-Heap allocated
92 _concurrent, // non-blocking, no safepoint, vm_op C-Heap allocated
93 _async_safepoint // non-blocking, safepoint, vm_op C-Heap allocated
94 };
96 enum VMOp_Type {
97 VM_OPS_DO(VM_OP_ENUM)
98 VMOp_Terminating
99 };
101 private:
102 Thread* _calling_thread;
103 ThreadPriority _priority;
104 long _timestamp;
105 VM_Operation* _next;
106 VM_Operation* _prev;
108 // The VM operation name array
109 static const char* _names[];
111 public:
112 VM_Operation() { _calling_thread = NULL; _next = NULL; _prev = NULL; }
113 virtual ~VM_Operation() {}
115 // VM operation support (used by VM thread)
116 Thread* calling_thread() const { return _calling_thread; }
117 ThreadPriority priority() { return _priority; }
118 void set_calling_thread(Thread* thread, ThreadPriority priority);
120 long timestamp() const { return _timestamp; }
121 void set_timestamp(long timestamp) { _timestamp = timestamp; }
123 // Called by VM thread - does in turn invoke doit(). Do not override this
124 void evaluate();
126 // evaluate() is called by the VMThread and in turn calls doit().
127 // If the thread invoking VMThread::execute((VM_Operation*) is a JavaThread,
128 // doit_prologue() is called in that thread before transferring control to
129 // the VMThread.
130 // If doit_prologue() returns true the VM operation will proceed, and
131 // doit_epilogue() will be called by the JavaThread once the VM operation
132 // completes. If doit_prologue() returns false the VM operation is cancelled.
133 virtual void doit() = 0;
134 virtual bool doit_prologue() { return true; };
135 virtual void doit_epilogue() {}; // Note: Not called if mode is: _concurrent
137 // Type test
138 virtual bool is_methodCompiler() const { return false; }
140 // Linking
141 VM_Operation *next() const { return _next; }
142 VM_Operation *prev() const { return _prev; }
143 void set_next(VM_Operation *next) { _next = next; }
144 void set_prev(VM_Operation *prev) { _prev = prev; }
146 // Configuration. Override these appropriatly in subclasses.
147 virtual VMOp_Type type() const = 0;
148 virtual Mode evaluation_mode() const { return _safepoint; }
149 virtual bool allow_nested_vm_operations() const { return false; }
150 virtual bool is_cheap_allocated() const { return false; }
151 virtual void oops_do(OopClosure* f) { /* do nothing */ };
153 // CAUTION: <don't hang yourself with following rope>
154 // If you override these methods, make sure that the evaluation
155 // of these methods is race-free and non-blocking, since these
156 // methods may be evaluated either by the mutators or by the
157 // vm thread, either concurrently with mutators or with the mutators
158 // stopped. In other words, taking locks is verboten, and if there
159 // are any races in evaluating the conditions, they'd better be benign.
160 virtual bool evaluate_at_safepoint() const {
161 return evaluation_mode() == _safepoint ||
162 evaluation_mode() == _async_safepoint;
163 }
164 virtual bool evaluate_concurrently() const {
165 return evaluation_mode() == _concurrent ||
166 evaluation_mode() == _async_safepoint;
167 }
169 // Debugging
170 void print_on_error(outputStream* st) const;
171 const char* name() const { return _names[type()]; }
172 static const char* name(int type) {
173 assert(type >= 0 && type < VMOp_Terminating, "invalid VM operation type");
174 return _names[type];
175 }
176 #ifndef PRODUCT
177 void print_on(outputStream* st) const { print_on_error(st); }
178 #endif
179 };
181 class VM_ThreadStop: public VM_Operation {
182 private:
183 oop _thread; // The Thread that the Throwable is thrown against
184 oop _throwable; // The Throwable thrown at the target Thread
185 public:
186 // All oops are passed as JNI handles, since there is no guarantee that a GC might happen before the
187 // VM operation is executed.
188 VM_ThreadStop(oop thread, oop throwable) {
189 _thread = thread;
190 _throwable = throwable;
191 }
192 VMOp_Type type() const { return VMOp_ThreadStop; }
193 oop target_thread() const { return _thread; }
194 oop throwable() const { return _throwable;}
195 void doit();
196 // We deoptimize if top-most frame is compiled - this might require a C2I adapter to be generated
197 bool allow_nested_vm_operations() const { return true; }
198 Mode evaluation_mode() const { return _async_safepoint; }
199 bool is_cheap_allocated() const { return true; }
201 // GC support
202 void oops_do(OopClosure* f) {
203 f->do_oop(&_thread); f->do_oop(&_throwable);
204 }
205 };
207 // dummy vm op, evaluated just to force a safepoint
208 class VM_ForceSafepoint: public VM_Operation {
209 public:
210 VM_ForceSafepoint() {}
211 void doit() {}
212 VMOp_Type type() const { return VMOp_ForceSafepoint; }
213 };
215 // dummy vm op, evaluated just to force a safepoint
216 class VM_ForceAsyncSafepoint: public VM_Operation {
217 public:
218 VM_ForceAsyncSafepoint() {}
219 void doit() {}
220 VMOp_Type type() const { return VMOp_ForceAsyncSafepoint; }
221 Mode evaluation_mode() const { return _async_safepoint; }
222 bool is_cheap_allocated() const { return true; }
223 };
225 class VM_Deoptimize: public VM_Operation {
226 public:
227 VM_Deoptimize() {}
228 VMOp_Type type() const { return VMOp_Deoptimize; }
229 void doit();
230 bool allow_nested_vm_operations() const { return true; }
231 };
233 class VM_DeoptimizeFrame: public VM_Operation {
234 private:
235 JavaThread* _thread;
236 intptr_t* _id;
237 public:
238 VM_DeoptimizeFrame(JavaThread* thread, intptr_t* id);
239 VMOp_Type type() const { return VMOp_DeoptimizeFrame; }
240 void doit();
241 bool allow_nested_vm_operations() const { return true; }
242 };
244 #ifndef PRODUCT
245 class VM_DeoptimizeAll: public VM_Operation {
246 private:
247 KlassHandle _dependee;
248 public:
249 VM_DeoptimizeAll() {}
250 VMOp_Type type() const { return VMOp_DeoptimizeAll; }
251 void doit();
252 bool allow_nested_vm_operations() const { return true; }
253 };
256 class VM_ZombieAll: public VM_Operation {
257 public:
258 VM_ZombieAll() {}
259 VMOp_Type type() const { return VMOp_ZombieAll; }
260 void doit();
261 bool allow_nested_vm_operations() const { return true; }
262 };
263 #endif // PRODUCT
265 class VM_Verify: public VM_Operation {
266 private:
267 KlassHandle _dependee;
268 public:
269 VM_Verify() {}
270 VMOp_Type type() const { return VMOp_Verify; }
271 void doit();
272 };
275 class VM_PrintThreads: public VM_Operation {
276 private:
277 outputStream* _out;
278 bool _print_concurrent_locks;
279 public:
280 VM_PrintThreads() { _out = tty; _print_concurrent_locks = PrintConcurrentLocks; }
281 VM_PrintThreads(outputStream* out, bool print_concurrent_locks) { _out = out; _print_concurrent_locks = print_concurrent_locks; }
282 VMOp_Type type() const { return VMOp_PrintThreads; }
283 void doit();
284 bool doit_prologue();
285 void doit_epilogue();
286 };
288 class VM_PrintJNI: public VM_Operation {
289 private:
290 outputStream* _out;
291 public:
292 VM_PrintJNI() { _out = tty; }
293 VM_PrintJNI(outputStream* out) { _out = out; }
294 VMOp_Type type() const { return VMOp_PrintJNI; }
295 void doit();
296 };
298 class DeadlockCycle;
299 class VM_FindDeadlocks: public VM_Operation {
300 private:
301 bool _concurrent_locks;
302 DeadlockCycle* _deadlocks;
303 outputStream* _out;
305 public:
306 VM_FindDeadlocks(bool concurrent_locks) : _concurrent_locks(concurrent_locks), _out(NULL), _deadlocks(NULL) {};
307 VM_FindDeadlocks(outputStream* st) : _concurrent_locks(true), _out(st), _deadlocks(NULL) {};
308 ~VM_FindDeadlocks();
310 DeadlockCycle* result() { return _deadlocks; };
311 VMOp_Type type() const { return VMOp_FindDeadlocks; }
312 void doit();
313 bool doit_prologue();
314 };
316 class ThreadDumpResult;
317 class ThreadSnapshot;
318 class ThreadConcurrentLocks;
320 class VM_ThreadDump : public VM_Operation {
321 private:
322 ThreadDumpResult* _result;
323 int _num_threads;
324 GrowableArray<instanceHandle>* _threads;
325 int _max_depth;
326 bool _with_locked_monitors;
327 bool _with_locked_synchronizers;
329 ThreadSnapshot* snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl);
331 public:
332 VM_ThreadDump(ThreadDumpResult* result,
333 int max_depth, // -1 indicates entire stack
334 bool with_locked_monitors,
335 bool with_locked_synchronizers);
337 VM_ThreadDump(ThreadDumpResult* result,
338 GrowableArray<instanceHandle>* threads,
339 int num_threads, // -1 indicates entire stack
340 int max_depth,
341 bool with_locked_monitors,
342 bool with_locked_synchronizers);
344 VMOp_Type type() const { return VMOp_ThreadDump; }
345 void doit();
346 bool doit_prologue();
347 void doit_epilogue();
348 };
351 class VM_Exit: public VM_Operation {
352 private:
353 int _exit_code;
354 static volatile bool _vm_exited;
355 static Thread * _shutdown_thread;
356 static void wait_if_vm_exited();
357 public:
358 VM_Exit(int exit_code) {
359 _exit_code = exit_code;
360 }
361 static int wait_for_threads_in_native_to_block();
362 static int set_vm_exited();
363 static bool vm_exited() { return _vm_exited; }
364 static void block_if_vm_exited() {
365 if (_vm_exited) {
366 wait_if_vm_exited();
367 }
368 }
369 VMOp_Type type() const { return VMOp_Exit; }
370 void doit();
371 };
