Mercurial > hg > truffle
annotate src/share/vm/services/threadService.hpp @ 17524:89152779163c
Merge with jdk8-b132
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Wed, 15 Oct 2014 11:59:32 +0200 |
| parents | 4ca6dc0799b6 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 17524 | 2 * Copyright (c) 2003, 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_SERVICES_THREADSERVICE_HPP |
| 26 #define SHARE_VM_SERVICES_THREADSERVICE_HPP | |
| 27 | |
| 28 #include "classfile/javaClasses.hpp" | |
| 29 #include "runtime/handles.hpp" | |
| 30 #include "runtime/init.hpp" | |
| 31 #include "runtime/jniHandles.hpp" | |
| 32 #include "runtime/objectMonitor.hpp" | |
| 33 #include "runtime/objectMonitor.inline.hpp" | |
| 34 #include "runtime/perfData.hpp" | |
| 35 #include "services/management.hpp" | |
| 36 #include "services/serviceUtil.hpp" | |
| 37 | |
| 0 | 38 class OopClosure; |
| 39 class ThreadDumpResult; | |
| 40 class ThreadStackTrace; | |
| 41 class ThreadSnapshot; | |
| 42 class StackFrameInfo; | |
| 43 class ThreadConcurrentLocks; | |
| 44 class DeadlockCycle; | |
| 45 | |
| 46 // VM monitoring and management support for the thread and | |
| 47 // synchronization subsystem | |
| 48 // | |
| 49 // Thread contention monitoring is disabled by default. | |
| 50 // When enabled, the VM will begin measuring the accumulated | |
| 51 // elapsed time a thread blocked on synchronization. | |
| 52 // | |
| 53 class ThreadService : public AllStatic { | |
| 54 private: | |
| 55 // These counters could be moved to Threads class | |
| 56 static PerfCounter* _total_threads_count; | |
| 57 static PerfVariable* _live_threads_count; | |
| 58 static PerfVariable* _peak_threads_count; | |
| 59 static PerfVariable* _daemon_threads_count; | |
| 60 | |
| 61 // These 2 counters are atomically incremented once the thread is exiting. | |
| 62 // They will be atomically decremented when ThreadService::remove_thread is called. | |
| 63 static volatile int _exiting_threads_count; | |
| 64 static volatile int _exiting_daemon_threads_count; | |
| 65 | |
| 66 static bool _thread_monitoring_contention_enabled; | |
| 67 static bool _thread_cpu_time_enabled; | |
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68 static bool _thread_allocated_memory_enabled; |
| 0 | 69 |
| 70 // Need to keep the list of thread dump result that | |
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71 // keep references to Method* since thread dump can be |
| 0 | 72 // requested by multiple threads concurrently. |
| 73 static ThreadDumpResult* _threaddump_list; | |
| 74 | |
| 75 public: | |
| 76 static void init(); | |
| 77 static void add_thread(JavaThread* thread, bool daemon); | |
| 78 static void remove_thread(JavaThread* thread, bool daemon); | |
| 79 static void current_thread_exiting(JavaThread* jt); | |
| 80 | |
| 81 static bool set_thread_monitoring_contention(bool flag); | |
| 82 static bool is_thread_monitoring_contention() { return _thread_monitoring_contention_enabled; } | |
| 83 | |
| 84 static bool set_thread_cpu_time_enabled(bool flag); | |
| 85 static bool is_thread_cpu_time_enabled() { return _thread_cpu_time_enabled; } | |
| 86 | |
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87 static bool set_thread_allocated_memory_enabled(bool flag); |
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88 static bool is_thread_allocated_memory_enabled() { return _thread_cpu_time_enabled; } |
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89 |
| 0 | 90 static jlong get_total_thread_count() { return _total_threads_count->get_value(); } |
| 91 static jlong get_peak_thread_count() { return _peak_threads_count->get_value(); } | |
| 92 static jlong get_live_thread_count() { return _live_threads_count->get_value() - _exiting_threads_count; } | |
| 93 static jlong get_daemon_thread_count() { return _daemon_threads_count->get_value() - _exiting_daemon_threads_count; } | |
| 94 | |
| 95 static int exiting_threads_count() { return _exiting_threads_count; } | |
| 96 static int exiting_daemon_threads_count() { return _exiting_daemon_threads_count; } | |
| 97 | |
| 98 // Support for thread dump | |
| 99 static void add_thread_dump(ThreadDumpResult* dump); | |
| 100 static void remove_thread_dump(ThreadDumpResult* dump); | |
| 101 | |
| 102 static Handle get_current_contended_monitor(JavaThread* thread); | |
| 103 | |
| 104 // This function is called by JVM_DumpThreads. | |
| 105 static Handle dump_stack_traces(GrowableArray<instanceHandle>* threads, | |
| 106 int num_threads, TRAPS); | |
| 107 | |
| 108 static void reset_peak_thread_count(); | |
| 109 static void reset_contention_count_stat(JavaThread* thread); | |
| 110 static void reset_contention_time_stat(JavaThread* thread); | |
| 111 | |
| 112 static DeadlockCycle* find_deadlocks_at_safepoint(bool object_monitors_only); | |
| 113 | |
| 114 // GC support | |
| 115 static void oops_do(OopClosure* f); | |
| 13391 | 116 static void metadata_do(void f(Metadata*)); |
| 0 | 117 }; |
| 118 | |
| 119 // Per-thread Statistics for synchronization | |
| 6197 | 120 class ThreadStatistics : public CHeapObj<mtInternal> { |
| 0 | 121 private: |
| 122 // The following contention statistics are only updated by | |
| 123 // the thread owning these statistics when contention occurs. | |
| 124 | |
| 125 jlong _contended_enter_count; | |
| 126 elapsedTimer _contended_enter_timer; | |
| 127 jlong _monitor_wait_count; | |
| 128 elapsedTimer _monitor_wait_timer; | |
| 129 jlong _sleep_count; | |
| 130 elapsedTimer _sleep_timer; | |
| 131 | |
| 132 | |
| 133 // These two reset flags are set to true when another thread | |
| 134 // requests to reset the statistics. The actual statistics | |
| 135 // are reset when the thread contention occurs and attempts | |
| 136 // to update the statistics. | |
| 137 bool _count_pending_reset; | |
| 138 bool _timer_pending_reset; | |
| 139 | |
| 140 // Keep accurate times for potentially recursive class operations | |
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141 int _perf_recursion_counts[6]; |
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142 elapsedTimer _perf_timers[6]; |
| 0 | 143 |
| 144 // utility functions | |
| 145 void check_and_reset_count() { | |
| 146 if (!_count_pending_reset) return; | |
| 147 _contended_enter_count = 0; | |
| 148 _monitor_wait_count = 0; | |
| 149 _sleep_count = 0; | |
| 150 _count_pending_reset = 0; | |
| 151 } | |
| 152 void check_and_reset_timer() { | |
| 153 if (!_timer_pending_reset) return; | |
| 154 _contended_enter_timer.reset(); | |
| 155 _monitor_wait_timer.reset(); | |
| 156 _sleep_timer.reset(); | |
| 157 _timer_pending_reset = 0; | |
| 158 } | |
| 159 | |
| 160 public: | |
| 161 ThreadStatistics(); | |
| 162 | |
| 163 jlong contended_enter_count() { return (_count_pending_reset ? 0 : _contended_enter_count); } | |
| 164 jlong contended_enter_ticks() { return (_timer_pending_reset ? 0 : _contended_enter_timer.active_ticks()); } | |
| 165 jlong monitor_wait_count() { return (_count_pending_reset ? 0 : _monitor_wait_count); } | |
| 166 jlong monitor_wait_ticks() { return (_timer_pending_reset ? 0 : _monitor_wait_timer.active_ticks()); } | |
| 167 jlong sleep_count() { return (_count_pending_reset ? 0 : _sleep_count); } | |
| 168 jlong sleep_ticks() { return (_timer_pending_reset ? 0 : _sleep_timer.active_ticks()); } | |
| 169 | |
| 170 void monitor_wait() { check_and_reset_count(); _monitor_wait_count++; } | |
| 171 void monitor_wait_begin() { check_and_reset_timer(); _monitor_wait_timer.start(); } | |
| 172 void monitor_wait_end() { _monitor_wait_timer.stop(); check_and_reset_timer(); } | |
| 173 | |
| 174 void thread_sleep() { check_and_reset_count(); _sleep_count++; } | |
| 175 void thread_sleep_begin() { check_and_reset_timer(); _sleep_timer.start(); } | |
| 176 void thread_sleep_end() { _sleep_timer.stop(); check_and_reset_timer(); } | |
| 177 | |
| 178 void contended_enter() { check_and_reset_count(); _contended_enter_count++; } | |
| 179 void contended_enter_begin() { check_and_reset_timer(); _contended_enter_timer.start(); } | |
| 180 void contended_enter_end() { _contended_enter_timer.stop(); check_and_reset_timer(); } | |
| 181 | |
| 182 void reset_count_stat() { _count_pending_reset = true; } | |
| 183 void reset_time_stat() { _timer_pending_reset = true; } | |
| 184 | |
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185 int* perf_recursion_counts_addr() { return _perf_recursion_counts; } |
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186 elapsedTimer* perf_timers_addr() { return _perf_timers; } |
| 0 | 187 }; |
| 188 | |
| 189 // Thread snapshot to represent the thread state and statistics | |
| 6197 | 190 class ThreadSnapshot : public CHeapObj<mtInternal> { |
| 0 | 191 private: |
| 192 JavaThread* _thread; | |
| 193 oop _threadObj; | |
| 194 java_lang_Thread::ThreadStatus _thread_status; | |
| 195 | |
| 196 bool _is_ext_suspended; | |
| 197 bool _is_in_native; | |
| 198 | |
| 199 jlong _contended_enter_ticks; | |
| 200 jlong _contended_enter_count; | |
| 201 jlong _monitor_wait_ticks; | |
| 202 jlong _monitor_wait_count; | |
| 203 jlong _sleep_ticks; | |
| 204 jlong _sleep_count; | |
| 205 oop _blocker_object; | |
| 206 oop _blocker_object_owner; | |
| 207 | |
| 208 ThreadStackTrace* _stack_trace; | |
| 209 ThreadConcurrentLocks* _concurrent_locks; | |
| 210 ThreadSnapshot* _next; | |
| 211 | |
| 212 public: | |
| 213 // Dummy snapshot | |
| 214 ThreadSnapshot() : _thread(NULL), _threadObj(NULL), _stack_trace(NULL), _concurrent_locks(NULL), _next(NULL), | |
| 215 _blocker_object(NULL), _blocker_object_owner(NULL) {}; | |
| 216 ThreadSnapshot(JavaThread* thread); | |
| 217 ~ThreadSnapshot(); | |
| 218 | |
| 219 java_lang_Thread::ThreadStatus thread_status() { return _thread_status; } | |
| 220 | |
| 221 oop threadObj() const { return _threadObj; } | |
| 222 | |
| 223 void set_next(ThreadSnapshot* n) { _next = n; } | |
| 224 | |
| 225 bool is_ext_suspended() { return _is_ext_suspended; } | |
| 226 bool is_in_native() { return _is_in_native; } | |
| 227 | |
| 228 jlong contended_enter_count() { return _contended_enter_count; } | |
| 229 jlong contended_enter_ticks() { return _contended_enter_ticks; } | |
| 230 jlong monitor_wait_count() { return _monitor_wait_count; } | |
| 231 jlong monitor_wait_ticks() { return _monitor_wait_ticks; } | |
| 232 jlong sleep_count() { return _sleep_count; } | |
| 233 jlong sleep_ticks() { return _sleep_ticks; } | |
| 234 | |
| 235 | |
| 236 oop blocker_object() { return _blocker_object; } | |
| 237 oop blocker_object_owner() { return _blocker_object_owner; } | |
| 238 | |
| 239 ThreadSnapshot* next() const { return _next; } | |
| 240 ThreadStackTrace* get_stack_trace() { return _stack_trace; } | |
| 241 ThreadConcurrentLocks* get_concurrent_locks() { return _concurrent_locks; } | |
| 242 | |
| 243 void dump_stack_at_safepoint(int max_depth, bool with_locked_monitors); | |
| 244 void set_concurrent_locks(ThreadConcurrentLocks* l) { _concurrent_locks = l; } | |
| 245 void oops_do(OopClosure* f); | |
| 13391 | 246 void metadata_do(void f(Metadata*)); |
| 0 | 247 }; |
| 248 | |
| 6197 | 249 class ThreadStackTrace : public CHeapObj<mtInternal> { |
| 0 | 250 private: |
| 251 JavaThread* _thread; | |
| 252 int _depth; // number of stack frames added | |
| 253 bool _with_locked_monitors; | |
| 254 GrowableArray<StackFrameInfo*>* _frames; | |
| 255 GrowableArray<oop>* _jni_locked_monitors; | |
| 256 | |
| 257 public: | |
| 258 | |
| 259 ThreadStackTrace(JavaThread* thread, bool with_locked_monitors); | |
| 260 ~ThreadStackTrace(); | |
| 261 | |
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262 JavaThread* thread() { return _thread; } |
| 0 | 263 StackFrameInfo* stack_frame_at(int i) { return _frames->at(i); } |
| 264 int get_stack_depth() { return _depth; } | |
| 265 | |
| 266 void add_stack_frame(javaVFrame* jvf); | |
| 267 void dump_stack_at_safepoint(int max_depth); | |
| 268 Handle allocate_fill_stack_trace_element_array(TRAPS); | |
| 269 void oops_do(OopClosure* f); | |
| 13391 | 270 void metadata_do(void f(Metadata*)); |
| 0 | 271 GrowableArray<oop>* jni_locked_monitors() { return _jni_locked_monitors; } |
| 272 int num_jni_locked_monitors() { return (_jni_locked_monitors != NULL ? _jni_locked_monitors->length() : 0); } | |
| 273 | |
| 274 bool is_owned_monitor_on_stack(oop object); | |
| 275 void add_jni_locked_monitor(oop object) { _jni_locked_monitors->append(object); } | |
| 276 }; | |
| 277 | |
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278 // StackFrameInfo for keeping Method* and bci during |
| 0 | 279 // stack walking for later construction of StackTraceElement[] |
| 280 // Java instances | |
| 6197 | 281 class StackFrameInfo : public CHeapObj<mtInternal> { |
| 0 | 282 private: |
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283 Method* _method; |
| 0 | 284 int _bci; |
| 285 GrowableArray<oop>* _locked_monitors; // list of object monitors locked by this frame | |
| 13391 | 286 // We need to save the mirrors in the backtrace to keep the class |
| 287 // from being unloaded while we still have this stack trace. | |
| 288 oop _class_holder; | |
| 0 | 289 |
| 290 public: | |
| 291 | |
| 292 StackFrameInfo(javaVFrame* jvf, bool with_locked_monitors); | |
| 293 ~StackFrameInfo() { | |
| 294 if (_locked_monitors != NULL) { | |
| 295 delete _locked_monitors; | |
| 296 } | |
| 297 }; | |
| 13391 | 298 Method* method() const { return _method; } |
| 0 | 299 int bci() const { return _bci; } |
| 300 void oops_do(OopClosure* f); | |
| 13391 | 301 void metadata_do(void f(Metadata*)); |
| 0 | 302 |
| 303 int num_locked_monitors() { return (_locked_monitors != NULL ? _locked_monitors->length() : 0); } | |
| 304 GrowableArray<oop>* locked_monitors() { return _locked_monitors; } | |
| 305 | |
| 306 void print_on(outputStream* st) const; | |
| 307 }; | |
| 308 | |
| 6197 | 309 class ThreadConcurrentLocks : public CHeapObj<mtInternal> { |
| 0 | 310 private: |
| 311 GrowableArray<instanceOop>* _owned_locks; | |
| 312 ThreadConcurrentLocks* _next; | |
| 313 JavaThread* _thread; | |
| 314 public: | |
| 315 ThreadConcurrentLocks(JavaThread* thread); | |
| 316 ~ThreadConcurrentLocks(); | |
| 317 | |
| 318 void add_lock(instanceOop o); | |
| 319 void set_next(ThreadConcurrentLocks* n) { _next = n; } | |
| 320 ThreadConcurrentLocks* next() { return _next; } | |
| 321 JavaThread* java_thread() { return _thread; } | |
| 322 GrowableArray<instanceOop>* owned_locks() { return _owned_locks; } | |
| 323 void oops_do(OopClosure* f); | |
| 324 }; | |
| 325 | |
| 326 class ConcurrentLocksDump : public StackObj { | |
| 327 private: | |
| 328 ThreadConcurrentLocks* _map; | |
| 329 ThreadConcurrentLocks* _last; // Last ThreadConcurrentLocks in the map | |
| 330 bool _retain_map_on_free; | |
| 331 | |
| 332 void build_map(GrowableArray<oop>* aos_objects); | |
| 333 void add_lock(JavaThread* thread, instanceOop o); | |
| 334 | |
| 335 public: | |
| 336 ConcurrentLocksDump(bool retain_map_on_free) : _map(NULL), _last(NULL), _retain_map_on_free(retain_map_on_free) {}; | |
| 337 ConcurrentLocksDump() : _map(NULL), _last(NULL), _retain_map_on_free(false) {}; | |
| 338 ~ConcurrentLocksDump(); | |
| 339 | |
| 340 void dump_at_safepoint(); | |
| 341 ThreadConcurrentLocks* thread_concurrent_locks(JavaThread* thread); | |
| 342 void print_locks_on(JavaThread* t, outputStream* st); | |
| 343 }; | |
| 344 | |
| 345 class ThreadDumpResult : public StackObj { | |
| 346 private: | |
| 347 int _num_threads; | |
| 348 int _num_snapshots; | |
| 349 ThreadSnapshot* _snapshots; | |
| 350 ThreadSnapshot* _last; | |
| 351 ThreadDumpResult* _next; | |
| 352 public: | |
| 353 ThreadDumpResult(); | |
| 354 ThreadDumpResult(int num_threads); | |
| 355 ~ThreadDumpResult(); | |
| 356 | |
| 357 void add_thread_snapshot(ThreadSnapshot* ts); | |
| 358 void set_next(ThreadDumpResult* next) { _next = next; } | |
| 359 ThreadDumpResult* next() { return _next; } | |
| 360 int num_threads() { return _num_threads; } | |
| 361 int num_snapshots() { return _num_snapshots; } | |
| 362 ThreadSnapshot* snapshots() { return _snapshots; } | |
| 363 void oops_do(OopClosure* f); | |
| 13391 | 364 void metadata_do(void f(Metadata*)); |
| 0 | 365 }; |
| 366 | |
| 6197 | 367 class DeadlockCycle : public CHeapObj<mtInternal> { |
| 0 | 368 private: |
| 369 bool _is_deadlock; | |
| 370 GrowableArray<JavaThread*>* _threads; | |
| 371 DeadlockCycle* _next; | |
| 372 public: | |
| 373 DeadlockCycle(); | |
| 374 ~DeadlockCycle(); | |
| 375 | |
| 376 DeadlockCycle* next() { return _next; } | |
| 377 void set_next(DeadlockCycle* d) { _next = d; } | |
| 378 void add_thread(JavaThread* t) { _threads->append(t); } | |
| 379 void reset() { _is_deadlock = false; _threads->clear(); } | |
| 380 void set_deadlock(bool value) { _is_deadlock = value; } | |
| 381 bool is_deadlock() { return _is_deadlock; } | |
| 382 int num_threads() { return _threads->length(); } | |
| 383 GrowableArray<JavaThread*>* threads() { return _threads; } | |
| 384 void print_on(outputStream* st) const; | |
| 385 }; | |
| 386 | |
| 387 // Utility class to get list of java threads. | |
| 388 class ThreadsListEnumerator : public StackObj { | |
| 389 private: | |
| 390 GrowableArray<instanceHandle>* _threads_array; | |
| 391 public: | |
| 392 ThreadsListEnumerator(Thread* cur_thread, | |
| 393 bool include_jvmti_agent_threads = false, | |
| 394 bool include_jni_attaching_threads = true); | |
| 395 int num_threads() { return _threads_array->length(); } | |
| 396 instanceHandle get_threadObj(int index) { return _threads_array->at(index); } | |
| 397 }; | |
| 398 | |
| 399 | |
| 400 // abstract utility class to set new thread states, and restore previous after the block exits | |
| 401 class JavaThreadStatusChanger : public StackObj { | |
| 402 private: | |
| 403 java_lang_Thread::ThreadStatus _old_state; | |
| 404 JavaThread* _java_thread; | |
| 405 bool _is_alive; | |
| 406 | |
| 407 void save_old_state(JavaThread* java_thread) { | |
| 408 _java_thread = java_thread; | |
| 409 _is_alive = is_alive(java_thread); | |
| 410 if (is_alive()) { | |
| 411 _old_state = java_lang_Thread::get_thread_status(_java_thread->threadObj()); | |
| 412 } | |
| 413 } | |
| 414 | |
| 415 public: | |
| 416 static void set_thread_status(JavaThread* java_thread, | |
| 417 java_lang_Thread::ThreadStatus state) { | |
| 418 java_lang_Thread::set_thread_status(java_thread->threadObj(), state); | |
| 419 } | |
| 420 | |
| 421 void set_thread_status(java_lang_Thread::ThreadStatus state) { | |
| 422 if (is_alive()) { | |
| 423 set_thread_status(_java_thread, state); | |
| 424 } | |
| 425 } | |
| 426 | |
| 427 JavaThreadStatusChanger(JavaThread* java_thread, | |
| 428 java_lang_Thread::ThreadStatus state) { | |
| 429 save_old_state(java_thread); | |
| 430 set_thread_status(state); | |
| 431 } | |
| 432 | |
| 433 JavaThreadStatusChanger(JavaThread* java_thread) { | |
| 434 save_old_state(java_thread); | |
| 435 } | |
| 436 | |
| 437 ~JavaThreadStatusChanger() { | |
| 438 set_thread_status(_old_state); | |
| 439 } | |
| 440 | |
| 441 static bool is_alive(JavaThread* java_thread) { | |
| 442 return java_thread != NULL && java_thread->threadObj() != NULL; | |
| 443 } | |
| 444 | |
| 445 bool is_alive() { | |
| 446 return _is_alive; | |
| 447 } | |
| 448 }; | |
| 449 | |
| 450 // Change status to waiting on an object (timed or indefinite) | |
| 451 class JavaThreadInObjectWaitState : public JavaThreadStatusChanger { | |
| 452 private: | |
| 453 ThreadStatistics* _stat; | |
| 454 bool _active; | |
| 455 | |
| 456 public: | |
| 457 JavaThreadInObjectWaitState(JavaThread *java_thread, bool timed) : | |
| 458 JavaThreadStatusChanger(java_thread, | |
| 459 timed ? java_lang_Thread::IN_OBJECT_WAIT_TIMED : java_lang_Thread::IN_OBJECT_WAIT) { | |
| 460 if (is_alive()) { | |
| 461 _stat = java_thread->get_thread_stat(); | |
| 462 _active = ThreadService::is_thread_monitoring_contention(); | |
| 463 _stat->monitor_wait(); | |
| 464 if (_active) { | |
| 465 _stat->monitor_wait_begin(); | |
| 466 } | |
| 467 } else { | |
| 468 _active = false; | |
| 469 } | |
| 470 } | |
| 471 | |
| 472 ~JavaThreadInObjectWaitState() { | |
| 473 if (_active) { | |
| 474 _stat->monitor_wait_end(); | |
| 475 } | |
| 476 } | |
| 477 }; | |
| 478 | |
| 479 // Change status to parked (timed or indefinite) | |
| 480 class JavaThreadParkedState : public JavaThreadStatusChanger { | |
| 481 private: | |
| 482 ThreadStatistics* _stat; | |
| 483 bool _active; | |
| 484 | |
| 485 public: | |
| 486 JavaThreadParkedState(JavaThread *java_thread, bool timed) : | |
| 487 JavaThreadStatusChanger(java_thread, | |
| 488 timed ? java_lang_Thread::PARKED_TIMED : java_lang_Thread::PARKED) { | |
| 489 if (is_alive()) { | |
| 490 _stat = java_thread->get_thread_stat(); | |
| 491 _active = ThreadService::is_thread_monitoring_contention(); | |
| 492 _stat->monitor_wait(); | |
| 493 if (_active) { | |
| 494 _stat->monitor_wait_begin(); | |
| 495 } | |
| 496 } else { | |
| 497 _active = false; | |
| 498 } | |
| 499 } | |
| 500 | |
| 501 ~JavaThreadParkedState() { | |
| 502 if (_active) { | |
| 503 _stat->monitor_wait_end(); | |
| 504 } | |
| 505 } | |
| 506 }; | |
| 507 | |
| 508 // Change status to blocked on (re-)entering a synchronization block | |
| 509 class JavaThreadBlockedOnMonitorEnterState : public JavaThreadStatusChanger { | |
| 510 private: | |
| 511 ThreadStatistics* _stat; | |
| 512 bool _active; | |
| 513 | |
| 514 static bool contended_enter_begin(JavaThread *java_thread) { | |
| 515 set_thread_status(java_thread, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); | |
| 516 ThreadStatistics* stat = java_thread->get_thread_stat(); | |
| 517 stat->contended_enter(); | |
| 518 bool active = ThreadService::is_thread_monitoring_contention(); | |
| 519 if (active) { | |
| 520 stat->contended_enter_begin(); | |
| 521 } | |
| 522 return active; | |
| 523 } | |
| 524 | |
| 525 public: | |
| 526 // java_thread is waiting thread being blocked on monitor reenter. | |
| 527 // Current thread is the notifying thread which holds the monitor. | |
| 528 static bool wait_reenter_begin(JavaThread *java_thread, ObjectMonitor *obj_m) { | |
| 529 assert((java_thread != NULL), "Java thread should not be null here"); | |
| 530 bool active = false; | |
| 531 if (is_alive(java_thread) && ServiceUtil::visible_oop((oop)obj_m->object())) { | |
| 532 active = contended_enter_begin(java_thread); | |
| 533 } | |
| 534 return active; | |
| 535 } | |
| 536 | |
| 537 static void wait_reenter_end(JavaThread *java_thread, bool active) { | |
| 538 if (active) { | |
| 539 java_thread->get_thread_stat()->contended_enter_end(); | |
| 540 } | |
| 541 set_thread_status(java_thread, java_lang_Thread::RUNNABLE); | |
| 542 } | |
| 543 | |
| 544 JavaThreadBlockedOnMonitorEnterState(JavaThread *java_thread, ObjectMonitor *obj_m) : | |
| 545 JavaThreadStatusChanger(java_thread) { | |
| 546 assert((java_thread != NULL), "Java thread should not be null here"); | |
| 547 // Change thread status and collect contended enter stats for monitor contended | |
| 548 // enter done for external java world objects and it is contended. All other cases | |
| 549 // like for vm internal objects and for external objects which are not contended | |
| 550 // thread status is not changed and contended enter stat is not collected. | |
| 551 _active = false; | |
| 552 if (is_alive() && ServiceUtil::visible_oop((oop)obj_m->object()) && obj_m->contentions() > 0) { | |
| 553 _stat = java_thread->get_thread_stat(); | |
| 554 _active = contended_enter_begin(java_thread); | |
| 555 } | |
| 556 } | |
| 557 | |
| 558 ~JavaThreadBlockedOnMonitorEnterState() { | |
| 559 if (_active) { | |
| 560 _stat->contended_enter_end(); | |
| 561 } | |
| 562 } | |
| 563 }; | |
| 564 | |
| 565 // Change status to sleeping | |
| 566 class JavaThreadSleepState : public JavaThreadStatusChanger { | |
| 567 private: | |
| 568 ThreadStatistics* _stat; | |
| 569 bool _active; | |
| 570 public: | |
| 571 JavaThreadSleepState(JavaThread *java_thread) : | |
| 572 JavaThreadStatusChanger(java_thread, java_lang_Thread::SLEEPING) { | |
| 573 if (is_alive()) { | |
| 574 _stat = java_thread->get_thread_stat(); | |
| 575 _active = ThreadService::is_thread_monitoring_contention(); | |
| 576 _stat->thread_sleep(); | |
| 577 if (_active) { | |
| 578 _stat->thread_sleep_begin(); | |
| 579 } | |
| 580 } else { | |
| 581 _active = false; | |
| 582 } | |
| 583 } | |
| 584 | |
| 585 ~JavaThreadSleepState() { | |
| 586 if (_active) { | |
| 587 _stat->thread_sleep_end(); | |
| 588 } | |
| 589 } | |
| 590 }; | |
| 1972 | 591 |
| 592 #endif // SHARE_VM_SERVICES_THREADSERVICE_HPP |