Mercurial > hg > graal-jvmci-8
annotate src/share/vm/services/threadService.hpp @ 470:ad8c8ca4ab0f jdk7-b42
6785258: Update copyright year
Summary: Update copyright for files that have been modified starting July 2008 to Dec 2008
Reviewed-by: katleman, ohair, tbell
author | xdono |
---|---|
date | Mon, 15 Dec 2008 16:55:11 -0800 |
parents | 4d05b7cb7842 |
children | 6a93908f268f |
rev | line source |
---|---|
0 | 1 /* |
470 | 2 * Copyright 2003-2008 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 class OopClosure; | |
26 class ThreadDumpResult; | |
27 class ThreadStackTrace; | |
28 class ThreadSnapshot; | |
29 class StackFrameInfo; | |
30 class ThreadConcurrentLocks; | |
31 class DeadlockCycle; | |
32 | |
33 // VM monitoring and management support for the thread and | |
34 // synchronization subsystem | |
35 // | |
36 // Thread contention monitoring is disabled by default. | |
37 // When enabled, the VM will begin measuring the accumulated | |
38 // elapsed time a thread blocked on synchronization. | |
39 // | |
40 class ThreadService : public AllStatic { | |
41 private: | |
42 // These counters could be moved to Threads class | |
43 static PerfCounter* _total_threads_count; | |
44 static PerfVariable* _live_threads_count; | |
45 static PerfVariable* _peak_threads_count; | |
46 static PerfVariable* _daemon_threads_count; | |
47 | |
48 // These 2 counters are atomically incremented once the thread is exiting. | |
49 // They will be atomically decremented when ThreadService::remove_thread is called. | |
50 static volatile int _exiting_threads_count; | |
51 static volatile int _exiting_daemon_threads_count; | |
52 | |
53 static bool _thread_monitoring_contention_enabled; | |
54 static bool _thread_cpu_time_enabled; | |
55 | |
56 // Need to keep the list of thread dump result that | |
57 // keep references to methodOop since thread dump can be | |
58 // requested by multiple threads concurrently. | |
59 static ThreadDumpResult* _threaddump_list; | |
60 | |
61 public: | |
62 static void init(); | |
63 static void add_thread(JavaThread* thread, bool daemon); | |
64 static void remove_thread(JavaThread* thread, bool daemon); | |
65 static void current_thread_exiting(JavaThread* jt); | |
66 | |
67 static bool set_thread_monitoring_contention(bool flag); | |
68 static bool is_thread_monitoring_contention() { return _thread_monitoring_contention_enabled; } | |
69 | |
70 static bool set_thread_cpu_time_enabled(bool flag); | |
71 static bool is_thread_cpu_time_enabled() { return _thread_cpu_time_enabled; } | |
72 | |
73 static jlong get_total_thread_count() { return _total_threads_count->get_value(); } | |
74 static jlong get_peak_thread_count() { return _peak_threads_count->get_value(); } | |
75 static jlong get_live_thread_count() { return _live_threads_count->get_value() - _exiting_threads_count; } | |
76 static jlong get_daemon_thread_count() { return _daemon_threads_count->get_value() - _exiting_daemon_threads_count; } | |
77 | |
78 static int exiting_threads_count() { return _exiting_threads_count; } | |
79 static int exiting_daemon_threads_count() { return _exiting_daemon_threads_count; } | |
80 | |
81 // Support for thread dump | |
82 static void add_thread_dump(ThreadDumpResult* dump); | |
83 static void remove_thread_dump(ThreadDumpResult* dump); | |
84 | |
85 static Handle get_current_contended_monitor(JavaThread* thread); | |
86 | |
87 // This function is called by JVM_DumpThreads. | |
88 static Handle dump_stack_traces(GrowableArray<instanceHandle>* threads, | |
89 int num_threads, TRAPS); | |
90 | |
91 static void reset_peak_thread_count(); | |
92 static void reset_contention_count_stat(JavaThread* thread); | |
93 static void reset_contention_time_stat(JavaThread* thread); | |
94 | |
95 static DeadlockCycle* find_deadlocks_at_safepoint(bool object_monitors_only); | |
96 | |
97 // GC support | |
98 static void oops_do(OopClosure* f); | |
99 }; | |
100 | |
101 // Per-thread Statistics for synchronization | |
102 class ThreadStatistics : public CHeapObj { | |
103 private: | |
104 // The following contention statistics are only updated by | |
105 // the thread owning these statistics when contention occurs. | |
106 | |
107 jlong _contended_enter_count; | |
108 elapsedTimer _contended_enter_timer; | |
109 jlong _monitor_wait_count; | |
110 elapsedTimer _monitor_wait_timer; | |
111 jlong _sleep_count; | |
112 elapsedTimer _sleep_timer; | |
113 | |
114 | |
115 // These two reset flags are set to true when another thread | |
116 // requests to reset the statistics. The actual statistics | |
117 // are reset when the thread contention occurs and attempts | |
118 // to update the statistics. | |
119 bool _count_pending_reset; | |
120 bool _timer_pending_reset; | |
121 | |
122 // Keep accurate times for potentially recursive class operations | |
123 int _class_init_recursion_count; | |
124 int _class_verify_recursion_count; | |
125 int _class_link_recursion_count; | |
126 | |
127 // utility functions | |
128 void check_and_reset_count() { | |
129 if (!_count_pending_reset) return; | |
130 _contended_enter_count = 0; | |
131 _monitor_wait_count = 0; | |
132 _sleep_count = 0; | |
133 _count_pending_reset = 0; | |
134 } | |
135 void check_and_reset_timer() { | |
136 if (!_timer_pending_reset) return; | |
137 _contended_enter_timer.reset(); | |
138 _monitor_wait_timer.reset(); | |
139 _sleep_timer.reset(); | |
140 _timer_pending_reset = 0; | |
141 } | |
142 | |
143 public: | |
144 ThreadStatistics(); | |
145 | |
146 jlong contended_enter_count() { return (_count_pending_reset ? 0 : _contended_enter_count); } | |
147 jlong contended_enter_ticks() { return (_timer_pending_reset ? 0 : _contended_enter_timer.active_ticks()); } | |
148 jlong monitor_wait_count() { return (_count_pending_reset ? 0 : _monitor_wait_count); } | |
149 jlong monitor_wait_ticks() { return (_timer_pending_reset ? 0 : _monitor_wait_timer.active_ticks()); } | |
150 jlong sleep_count() { return (_count_pending_reset ? 0 : _sleep_count); } | |
151 jlong sleep_ticks() { return (_timer_pending_reset ? 0 : _sleep_timer.active_ticks()); } | |
152 | |
153 void monitor_wait() { check_and_reset_count(); _monitor_wait_count++; } | |
154 void monitor_wait_begin() { check_and_reset_timer(); _monitor_wait_timer.start(); } | |
155 void monitor_wait_end() { _monitor_wait_timer.stop(); check_and_reset_timer(); } | |
156 | |
157 void thread_sleep() { check_and_reset_count(); _sleep_count++; } | |
158 void thread_sleep_begin() { check_and_reset_timer(); _sleep_timer.start(); } | |
159 void thread_sleep_end() { _sleep_timer.stop(); check_and_reset_timer(); } | |
160 | |
161 void contended_enter() { check_and_reset_count(); _contended_enter_count++; } | |
162 void contended_enter_begin() { check_and_reset_timer(); _contended_enter_timer.start(); } | |
163 void contended_enter_end() { _contended_enter_timer.stop(); check_and_reset_timer(); } | |
164 | |
165 void reset_count_stat() { _count_pending_reset = true; } | |
166 void reset_time_stat() { _timer_pending_reset = true; } | |
167 | |
168 int* class_init_recursion_count_addr() { return &_class_init_recursion_count; } | |
169 int* class_verify_recursion_count_addr() { return &_class_verify_recursion_count; } | |
170 int* class_link_recursion_count_addr() { return &_class_link_recursion_count; } | |
171 }; | |
172 | |
173 // Thread snapshot to represent the thread state and statistics | |
174 class ThreadSnapshot : public CHeapObj { | |
175 private: | |
176 JavaThread* _thread; | |
177 oop _threadObj; | |
178 java_lang_Thread::ThreadStatus _thread_status; | |
179 | |
180 bool _is_ext_suspended; | |
181 bool _is_in_native; | |
182 | |
183 jlong _contended_enter_ticks; | |
184 jlong _contended_enter_count; | |
185 jlong _monitor_wait_ticks; | |
186 jlong _monitor_wait_count; | |
187 jlong _sleep_ticks; | |
188 jlong _sleep_count; | |
189 oop _blocker_object; | |
190 oop _blocker_object_owner; | |
191 | |
192 ThreadStackTrace* _stack_trace; | |
193 ThreadConcurrentLocks* _concurrent_locks; | |
194 ThreadSnapshot* _next; | |
195 | |
196 public: | |
197 // Dummy snapshot | |
198 ThreadSnapshot() : _thread(NULL), _threadObj(NULL), _stack_trace(NULL), _concurrent_locks(NULL), _next(NULL), | |
199 _blocker_object(NULL), _blocker_object_owner(NULL) {}; | |
200 ThreadSnapshot(JavaThread* thread); | |
201 ~ThreadSnapshot(); | |
202 | |
203 java_lang_Thread::ThreadStatus thread_status() { return _thread_status; } | |
204 | |
205 oop threadObj() const { return _threadObj; } | |
206 | |
207 void set_next(ThreadSnapshot* n) { _next = n; } | |
208 | |
209 bool is_ext_suspended() { return _is_ext_suspended; } | |
210 bool is_in_native() { return _is_in_native; } | |
211 | |
212 jlong contended_enter_count() { return _contended_enter_count; } | |
213 jlong contended_enter_ticks() { return _contended_enter_ticks; } | |
214 jlong monitor_wait_count() { return _monitor_wait_count; } | |
215 jlong monitor_wait_ticks() { return _monitor_wait_ticks; } | |
216 jlong sleep_count() { return _sleep_count; } | |
217 jlong sleep_ticks() { return _sleep_ticks; } | |
218 | |
219 | |
220 oop blocker_object() { return _blocker_object; } | |
221 oop blocker_object_owner() { return _blocker_object_owner; } | |
222 | |
223 ThreadSnapshot* next() const { return _next; } | |
224 ThreadStackTrace* get_stack_trace() { return _stack_trace; } | |
225 ThreadConcurrentLocks* get_concurrent_locks() { return _concurrent_locks; } | |
226 | |
227 void dump_stack_at_safepoint(int max_depth, bool with_locked_monitors); | |
228 void set_concurrent_locks(ThreadConcurrentLocks* l) { _concurrent_locks = l; } | |
229 void oops_do(OopClosure* f); | |
230 }; | |
231 | |
232 class ThreadStackTrace : public CHeapObj { | |
233 private: | |
234 JavaThread* _thread; | |
235 int _depth; // number of stack frames added | |
236 bool _with_locked_monitors; | |
237 GrowableArray<StackFrameInfo*>* _frames; | |
238 GrowableArray<oop>* _jni_locked_monitors; | |
239 | |
240 public: | |
241 | |
242 ThreadStackTrace(JavaThread* thread, bool with_locked_monitors); | |
243 ~ThreadStackTrace(); | |
244 | |
396
4d05b7cb7842
6306922: Dump dump created by +HeapDumpOnOutOfMemoryError should include stack traces for stack roots
mchung
parents:
0
diff
changeset
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245 JavaThread* thread() { return _thread; } |
0 | 246 StackFrameInfo* stack_frame_at(int i) { return _frames->at(i); } |
247 int get_stack_depth() { return _depth; } | |
248 | |
249 void add_stack_frame(javaVFrame* jvf); | |
250 void dump_stack_at_safepoint(int max_depth); | |
251 Handle allocate_fill_stack_trace_element_array(TRAPS); | |
252 void oops_do(OopClosure* f); | |
253 GrowableArray<oop>* jni_locked_monitors() { return _jni_locked_monitors; } | |
254 int num_jni_locked_monitors() { return (_jni_locked_monitors != NULL ? _jni_locked_monitors->length() : 0); } | |
255 | |
256 bool is_owned_monitor_on_stack(oop object); | |
257 void add_jni_locked_monitor(oop object) { _jni_locked_monitors->append(object); } | |
258 }; | |
259 | |
260 // StackFrameInfo for keeping methodOop and bci during | |
261 // stack walking for later construction of StackTraceElement[] | |
262 // Java instances | |
263 class StackFrameInfo : public CHeapObj { | |
264 private: | |
265 methodOop _method; | |
266 int _bci; | |
267 GrowableArray<oop>* _locked_monitors; // list of object monitors locked by this frame | |
268 | |
269 public: | |
270 | |
271 StackFrameInfo(javaVFrame* jvf, bool with_locked_monitors); | |
272 ~StackFrameInfo() { | |
273 if (_locked_monitors != NULL) { | |
274 delete _locked_monitors; | |
275 } | |
276 }; | |
277 methodOop method() const { return _method; } | |
278 int bci() const { return _bci; } | |
279 void oops_do(OopClosure* f); | |
280 | |
281 int num_locked_monitors() { return (_locked_monitors != NULL ? _locked_monitors->length() : 0); } | |
282 GrowableArray<oop>* locked_monitors() { return _locked_monitors; } | |
283 | |
284 void print_on(outputStream* st) const; | |
285 }; | |
286 | |
287 class ThreadConcurrentLocks : public CHeapObj { | |
288 private: | |
289 GrowableArray<instanceOop>* _owned_locks; | |
290 ThreadConcurrentLocks* _next; | |
291 JavaThread* _thread; | |
292 public: | |
293 ThreadConcurrentLocks(JavaThread* thread); | |
294 ~ThreadConcurrentLocks(); | |
295 | |
296 void add_lock(instanceOop o); | |
297 void set_next(ThreadConcurrentLocks* n) { _next = n; } | |
298 ThreadConcurrentLocks* next() { return _next; } | |
299 JavaThread* java_thread() { return _thread; } | |
300 GrowableArray<instanceOop>* owned_locks() { return _owned_locks; } | |
301 void oops_do(OopClosure* f); | |
302 }; | |
303 | |
304 class ConcurrentLocksDump : public StackObj { | |
305 private: | |
306 ThreadConcurrentLocks* _map; | |
307 ThreadConcurrentLocks* _last; // Last ThreadConcurrentLocks in the map | |
308 bool _retain_map_on_free; | |
309 | |
310 void build_map(GrowableArray<oop>* aos_objects); | |
311 void add_lock(JavaThread* thread, instanceOop o); | |
312 | |
313 public: | |
314 ConcurrentLocksDump(bool retain_map_on_free) : _map(NULL), _last(NULL), _retain_map_on_free(retain_map_on_free) {}; | |
315 ConcurrentLocksDump() : _map(NULL), _last(NULL), _retain_map_on_free(false) {}; | |
316 ~ConcurrentLocksDump(); | |
317 | |
318 void dump_at_safepoint(); | |
319 ThreadConcurrentLocks* thread_concurrent_locks(JavaThread* thread); | |
320 void print_locks_on(JavaThread* t, outputStream* st); | |
321 }; | |
322 | |
323 class ThreadDumpResult : public StackObj { | |
324 private: | |
325 int _num_threads; | |
326 int _num_snapshots; | |
327 ThreadSnapshot* _snapshots; | |
328 ThreadSnapshot* _last; | |
329 ThreadDumpResult* _next; | |
330 public: | |
331 ThreadDumpResult(); | |
332 ThreadDumpResult(int num_threads); | |
333 ~ThreadDumpResult(); | |
334 | |
335 void add_thread_snapshot(ThreadSnapshot* ts); | |
336 void set_next(ThreadDumpResult* next) { _next = next; } | |
337 ThreadDumpResult* next() { return _next; } | |
338 int num_threads() { return _num_threads; } | |
339 int num_snapshots() { return _num_snapshots; } | |
340 ThreadSnapshot* snapshots() { return _snapshots; } | |
341 void oops_do(OopClosure* f); | |
342 }; | |
343 | |
344 class DeadlockCycle : public CHeapObj { | |
345 private: | |
346 bool _is_deadlock; | |
347 GrowableArray<JavaThread*>* _threads; | |
348 DeadlockCycle* _next; | |
349 public: | |
350 DeadlockCycle(); | |
351 ~DeadlockCycle(); | |
352 | |
353 DeadlockCycle* next() { return _next; } | |
354 void set_next(DeadlockCycle* d) { _next = d; } | |
355 void add_thread(JavaThread* t) { _threads->append(t); } | |
356 void reset() { _is_deadlock = false; _threads->clear(); } | |
357 void set_deadlock(bool value) { _is_deadlock = value; } | |
358 bool is_deadlock() { return _is_deadlock; } | |
359 int num_threads() { return _threads->length(); } | |
360 GrowableArray<JavaThread*>* threads() { return _threads; } | |
361 void print_on(outputStream* st) const; | |
362 }; | |
363 | |
364 // Utility class to get list of java threads. | |
365 class ThreadsListEnumerator : public StackObj { | |
366 private: | |
367 GrowableArray<instanceHandle>* _threads_array; | |
368 public: | |
369 ThreadsListEnumerator(Thread* cur_thread, | |
370 bool include_jvmti_agent_threads = false, | |
371 bool include_jni_attaching_threads = true); | |
372 int num_threads() { return _threads_array->length(); } | |
373 instanceHandle get_threadObj(int index) { return _threads_array->at(index); } | |
374 }; | |
375 | |
376 | |
377 // abstract utility class to set new thread states, and restore previous after the block exits | |
378 class JavaThreadStatusChanger : public StackObj { | |
379 private: | |
380 java_lang_Thread::ThreadStatus _old_state; | |
381 JavaThread* _java_thread; | |
382 bool _is_alive; | |
383 | |
384 void save_old_state(JavaThread* java_thread) { | |
385 _java_thread = java_thread; | |
386 _is_alive = is_alive(java_thread); | |
387 if (is_alive()) { | |
388 _old_state = java_lang_Thread::get_thread_status(_java_thread->threadObj()); | |
389 } | |
390 } | |
391 | |
392 public: | |
393 static void set_thread_status(JavaThread* java_thread, | |
394 java_lang_Thread::ThreadStatus state) { | |
395 java_lang_Thread::set_thread_status(java_thread->threadObj(), state); | |
396 } | |
397 | |
398 void set_thread_status(java_lang_Thread::ThreadStatus state) { | |
399 if (is_alive()) { | |
400 set_thread_status(_java_thread, state); | |
401 } | |
402 } | |
403 | |
404 JavaThreadStatusChanger(JavaThread* java_thread, | |
405 java_lang_Thread::ThreadStatus state) { | |
406 save_old_state(java_thread); | |
407 set_thread_status(state); | |
408 } | |
409 | |
410 JavaThreadStatusChanger(JavaThread* java_thread) { | |
411 save_old_state(java_thread); | |
412 } | |
413 | |
414 ~JavaThreadStatusChanger() { | |
415 set_thread_status(_old_state); | |
416 } | |
417 | |
418 static bool is_alive(JavaThread* java_thread) { | |
419 return java_thread != NULL && java_thread->threadObj() != NULL; | |
420 } | |
421 | |
422 bool is_alive() { | |
423 return _is_alive; | |
424 } | |
425 }; | |
426 | |
427 // Change status to waiting on an object (timed or indefinite) | |
428 class JavaThreadInObjectWaitState : public JavaThreadStatusChanger { | |
429 private: | |
430 ThreadStatistics* _stat; | |
431 bool _active; | |
432 | |
433 public: | |
434 JavaThreadInObjectWaitState(JavaThread *java_thread, bool timed) : | |
435 JavaThreadStatusChanger(java_thread, | |
436 timed ? java_lang_Thread::IN_OBJECT_WAIT_TIMED : java_lang_Thread::IN_OBJECT_WAIT) { | |
437 if (is_alive()) { | |
438 _stat = java_thread->get_thread_stat(); | |
439 _active = ThreadService::is_thread_monitoring_contention(); | |
440 _stat->monitor_wait(); | |
441 if (_active) { | |
442 _stat->monitor_wait_begin(); | |
443 } | |
444 } else { | |
445 _active = false; | |
446 } | |
447 } | |
448 | |
449 ~JavaThreadInObjectWaitState() { | |
450 if (_active) { | |
451 _stat->monitor_wait_end(); | |
452 } | |
453 } | |
454 }; | |
455 | |
456 // Change status to parked (timed or indefinite) | |
457 class JavaThreadParkedState : public JavaThreadStatusChanger { | |
458 private: | |
459 ThreadStatistics* _stat; | |
460 bool _active; | |
461 | |
462 public: | |
463 JavaThreadParkedState(JavaThread *java_thread, bool timed) : | |
464 JavaThreadStatusChanger(java_thread, | |
465 timed ? java_lang_Thread::PARKED_TIMED : java_lang_Thread::PARKED) { | |
466 if (is_alive()) { | |
467 _stat = java_thread->get_thread_stat(); | |
468 _active = ThreadService::is_thread_monitoring_contention(); | |
469 _stat->monitor_wait(); | |
470 if (_active) { | |
471 _stat->monitor_wait_begin(); | |
472 } | |
473 } else { | |
474 _active = false; | |
475 } | |
476 } | |
477 | |
478 ~JavaThreadParkedState() { | |
479 if (_active) { | |
480 _stat->monitor_wait_end(); | |
481 } | |
482 } | |
483 }; | |
484 | |
485 // Change status to blocked on (re-)entering a synchronization block | |
486 class JavaThreadBlockedOnMonitorEnterState : public JavaThreadStatusChanger { | |
487 private: | |
488 ThreadStatistics* _stat; | |
489 bool _active; | |
490 | |
491 static bool contended_enter_begin(JavaThread *java_thread) { | |
492 set_thread_status(java_thread, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); | |
493 ThreadStatistics* stat = java_thread->get_thread_stat(); | |
494 stat->contended_enter(); | |
495 bool active = ThreadService::is_thread_monitoring_contention(); | |
496 if (active) { | |
497 stat->contended_enter_begin(); | |
498 } | |
499 return active; | |
500 } | |
501 | |
502 public: | |
503 // java_thread is waiting thread being blocked on monitor reenter. | |
504 // Current thread is the notifying thread which holds the monitor. | |
505 static bool wait_reenter_begin(JavaThread *java_thread, ObjectMonitor *obj_m) { | |
506 assert((java_thread != NULL), "Java thread should not be null here"); | |
507 bool active = false; | |
508 if (is_alive(java_thread) && ServiceUtil::visible_oop((oop)obj_m->object())) { | |
509 active = contended_enter_begin(java_thread); | |
510 } | |
511 return active; | |
512 } | |
513 | |
514 static void wait_reenter_end(JavaThread *java_thread, bool active) { | |
515 if (active) { | |
516 java_thread->get_thread_stat()->contended_enter_end(); | |
517 } | |
518 set_thread_status(java_thread, java_lang_Thread::RUNNABLE); | |
519 } | |
520 | |
521 JavaThreadBlockedOnMonitorEnterState(JavaThread *java_thread, ObjectMonitor *obj_m) : | |
522 JavaThreadStatusChanger(java_thread) { | |
523 assert((java_thread != NULL), "Java thread should not be null here"); | |
524 // Change thread status and collect contended enter stats for monitor contended | |
525 // enter done for external java world objects and it is contended. All other cases | |
526 // like for vm internal objects and for external objects which are not contended | |
527 // thread status is not changed and contended enter stat is not collected. | |
528 _active = false; | |
529 if (is_alive() && ServiceUtil::visible_oop((oop)obj_m->object()) && obj_m->contentions() > 0) { | |
530 _stat = java_thread->get_thread_stat(); | |
531 _active = contended_enter_begin(java_thread); | |
532 } | |
533 } | |
534 | |
535 ~JavaThreadBlockedOnMonitorEnterState() { | |
536 if (_active) { | |
537 _stat->contended_enter_end(); | |
538 } | |
539 } | |
540 }; | |
541 | |
542 // Change status to sleeping | |
543 class JavaThreadSleepState : public JavaThreadStatusChanger { | |
544 private: | |
545 ThreadStatistics* _stat; | |
546 bool _active; | |
547 public: | |
548 JavaThreadSleepState(JavaThread *java_thread) : | |
549 JavaThreadStatusChanger(java_thread, java_lang_Thread::SLEEPING) { | |
550 if (is_alive()) { | |
551 _stat = java_thread->get_thread_stat(); | |
552 _active = ThreadService::is_thread_monitoring_contention(); | |
553 _stat->thread_sleep(); | |
554 if (_active) { | |
555 _stat->thread_sleep_begin(); | |
556 } | |
557 } else { | |
558 _active = false; | |
559 } | |
560 } | |
561 | |
562 ~JavaThreadSleepState() { | |
563 if (_active) { | |
564 _stat->thread_sleep_end(); | |
565 } | |
566 } | |
567 }; |