threadService.hpp revision 5776:de6a9e811145
1164640Sflz/* 298186Sgordon * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. 378344Sobrien * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4157473Sflz * 578344Sobrien * This code is free software; you can redistribute it and/or modify it 678344Sobrien * under the terms of the GNU General Public License version 2 only, as 778344Sobrien * published by the Free Software Foundation. 878344Sobrien * 978344Sobrien * This code is distributed in the hope that it will be useful, but WITHOUT 1078344Sobrien * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1178344Sobrien * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1278344Sobrien * version 2 for more details (a copy is included in the LICENSE file that 1378344Sobrien * accompanied this code). 1478344Sobrien * 1578344Sobrien * You should have received a copy of the GNU General Public License version 1678344Sobrien * 2 along with this work; if not, write to the Free Software Foundation, 1778344Sobrien * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1878344Sobrien * 1978344Sobrien * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2078344Sobrien * or visit www.oracle.com if you need additional information or have any 2178344Sobrien * questions. 2278344Sobrien * 2378344Sobrien */ 2478344Sobrien 2578344Sobrien#ifndef SHARE_VM_SERVICES_THREADSERVICE_HPP 2678344Sobrien#define SHARE_VM_SERVICES_THREADSERVICE_HPP 2778344Sobrien 2878344Sobrien#include "classfile/javaClasses.hpp" 2978344Sobrien#include "runtime/handles.hpp" 3078344Sobrien#include "runtime/init.hpp" 3178344Sobrien#include "runtime/jniHandles.hpp" 3278344Sobrien#include "runtime/objectMonitor.hpp" 3378344Sobrien#include "runtime/objectMonitor.inline.hpp" 3478344Sobrien#include "runtime/perfData.hpp" 35169668Smtm#include "services/management.hpp" 36157473Sflz#include "services/serviceUtil.hpp" 3778344Sobrien 3898186Sgordonclass OopClosure; 3998186Sgordonclass ThreadDumpResult; 4098186Sgordonclass ThreadStackTrace; 41131550Scpercivaclass ThreadSnapshot; 42131550Scpercivaclass StackFrameInfo; 43131550Scpercivaclass ThreadConcurrentLocks; 44131550Scpercivaclass DeadlockCycle; 4598186Sgordon 4698186Sgordon// VM monitoring and management support for the thread and 47202988Semaste// synchronization subsystem 48295949Saraujo// 49124832Smtm// Thread contention monitoring is disabled by default. 50124832Smtm// When enabled, the VM will begin measuring the accumulated 51161435Syar// elapsed time a thread blocked on synchronization. 52161435Syar// 5398186Sgordonclass ThreadService : public AllStatic { 5498186Sgordonprivate: 5578344Sobrien // These counters could be moved to Threads class 5678344Sobrien static PerfCounter* _total_threads_count; 5778344Sobrien static PerfVariable* _live_threads_count; 58264243Sdteske static PerfVariable* _peak_threads_count; 59264243Sdteske static PerfVariable* _daemon_threads_count; 60264243Sdteske 61264243Sdteske // These 2 counters are atomically incremented once the thread is exiting. 62264243Sdteske // They will be atomically decremented when ThreadService::remove_thread is called. 63264243Sdteske static volatile int _exiting_threads_count; 64264243Sdteske static volatile int _exiting_daemon_threads_count; 65264243Sdteske 66264243Sdteske static bool _thread_monitoring_contention_enabled; 67264243Sdteske static bool _thread_cpu_time_enabled; 68264243Sdteske static bool _thread_allocated_memory_enabled; 69264243Sdteske 70264243Sdteske // Need to keep the list of thread dump result that 71264243Sdteske // keep references to Method* since thread dump can be 72272393Shrs // requested by multiple threads concurrently. 73272393Shrs static ThreadDumpResult* _threaddump_list; 74272393Shrs 75272393Shrspublic: 76272393Shrs static void init(); 77272393Shrs static void add_thread(JavaThread* thread, bool daemon); 78272393Shrs static void remove_thread(JavaThread* thread, bool daemon); 79272393Shrs static void current_thread_exiting(JavaThread* jt); 80272393Shrs 81272393Shrs static bool set_thread_monitoring_contention(bool flag); 82272393Shrs static bool is_thread_monitoring_contention() { return _thread_monitoring_contention_enabled; } 83272393Shrs 84272393Shrs static bool set_thread_cpu_time_enabled(bool flag); 85272393Shrs static bool is_thread_cpu_time_enabled() { return _thread_cpu_time_enabled; } 86272393Shrs 87272393Shrs static bool set_thread_allocated_memory_enabled(bool flag); 88272393Shrs static bool is_thread_allocated_memory_enabled() { return _thread_cpu_time_enabled; } 89272393Shrs 90272393Shrs static jlong get_total_thread_count() { return _total_threads_count->get_value(); } 91272393Shrs static jlong get_peak_thread_count() { return _peak_threads_count->get_value(); } 92272393Shrs static jlong get_live_thread_count() { return _live_threads_count->get_value() - _exiting_threads_count; } 93272393Shrs static jlong get_daemon_thread_count() { return _daemon_threads_count->get_value() - _exiting_daemon_threads_count; } 94272393Shrs 95272393Shrs static int exiting_threads_count() { return _exiting_threads_count; } 96272393Shrs static int exiting_daemon_threads_count() { return _exiting_daemon_threads_count; } 97272393Shrs 98272393Shrs // Support for thread dump 99272393Shrs static void add_thread_dump(ThreadDumpResult* dump); 100272393Shrs static void remove_thread_dump(ThreadDumpResult* dump); 101272393Shrs 102272393Shrs static Handle get_current_contended_monitor(JavaThread* thread); 103272393Shrs 104272393Shrs // This function is called by JVM_DumpThreads. 105197144Shrs static Handle dump_stack_traces(GrowableArray<instanceHandle>* threads, 106197144Shrs int num_threads, TRAPS); 107197144Shrs 10898186Sgordon static void reset_peak_thread_count(); 109197144Shrs static void reset_contention_count_stat(JavaThread* thread); 110197144Shrs static void reset_contention_time_stat(JavaThread* thread); 111197144Shrs 112197144Shrs static DeadlockCycle* find_deadlocks_at_safepoint(bool object_monitors_only); 113272393Shrs 114197144Shrs // GC support 115197144Shrs static void oops_do(OopClosure* f); 116197144Shrs static void metadata_do(void f(Metadata*)); 117197144Shrs}; 118197144Shrs 119197144Shrs// Per-thread Statistics for synchronization 120197144Shrsclass ThreadStatistics : public CHeapObj<mtInternal> { 121197144Shrsprivate: 122231667Sdougb // The following contention statistics are only updated by 12398186Sgordon // the thread owning these statistics when contention occurs. 124231667Sdougb 12598186Sgordon jlong _contended_enter_count; 126231667Sdougb elapsedTimer _contended_enter_timer; 12798186Sgordon jlong _monitor_wait_count; 12898186Sgordon elapsedTimer _monitor_wait_timer; 12998186Sgordon jlong _sleep_count; 130231667Sdougb elapsedTimer _sleep_timer; 131231667Sdougb 13298186Sgordon 133231667Sdougb // These two reset flags are set to true when another thread 13498186Sgordon // requests to reset the statistics. The actual statistics 135231667Sdougb // are reset when the thread contention occurs and attempts 136231667Sdougb // to update the statistics. 137231667Sdougb bool _count_pending_reset; 138231667Sdougb bool _timer_pending_reset; 139231667Sdougb 14098186Sgordon // Keep accurate times for potentially recursive class operations 141146490Sschweikh int _perf_recursion_counts[6]; 14298186Sgordon elapsedTimer _perf_timers[6]; 14398186Sgordon 14498186Sgordon // utility functions 14598186Sgordon void check_and_reset_count() { 14698186Sgordon if (!_count_pending_reset) return; 14798186Sgordon _contended_enter_count = 0; 14878344Sobrien _monitor_wait_count = 0; 14978344Sobrien _sleep_count = 0; 15078344Sobrien _count_pending_reset = 0; 15178344Sobrien } 15278344Sobrien void check_and_reset_timer() { 15378344Sobrien if (!_timer_pending_reset) return; 15478344Sobrien _contended_enter_timer.reset(); 15598186Sgordon _monitor_wait_timer.reset(); 15678344Sobrien _sleep_timer.reset(); 15778344Sobrien _timer_pending_reset = 0; 15878344Sobrien } 15978344Sobrien 16078344Sobrienpublic: 16178344Sobrien ThreadStatistics(); 16278344Sobrien 16378344Sobrien jlong contended_enter_count() { return (_count_pending_reset ? 0 : _contended_enter_count); } 16478344Sobrien jlong contended_enter_ticks() { return (_timer_pending_reset ? 0 : _contended_enter_timer.active_ticks()); } 16578344Sobrien jlong monitor_wait_count() { return (_count_pending_reset ? 0 : _monitor_wait_count); } 16678344Sobrien jlong monitor_wait_ticks() { return (_timer_pending_reset ? 0 : _monitor_wait_timer.active_ticks()); } 16778344Sobrien jlong sleep_count() { return (_count_pending_reset ? 0 : _sleep_count); } 168229822Sdougb jlong sleep_ticks() { return (_timer_pending_reset ? 0 : _sleep_timer.active_ticks()); } 16978344Sobrien 17078344Sobrien void monitor_wait() { check_and_reset_count(); _monitor_wait_count++; } 17178344Sobrien void monitor_wait_begin() { check_and_reset_timer(); _monitor_wait_timer.start(); } 17278344Sobrien void monitor_wait_end() { _monitor_wait_timer.stop(); check_and_reset_timer(); } 17378344Sobrien 174157473Sflz void thread_sleep() { check_and_reset_count(); _sleep_count++; } 17598186Sgordon void thread_sleep_begin() { check_and_reset_timer(); _sleep_timer.start(); } 17698186Sgordon void thread_sleep_end() { _sleep_timer.stop(); check_and_reset_timer(); } 17778344Sobrien 17898186Sgordon void contended_enter() { check_and_reset_count(); _contended_enter_count++; } 17998186Sgordon void contended_enter_begin() { check_and_reset_timer(); _contended_enter_timer.start(); } 18098186Sgordon void contended_enter_end() { _contended_enter_timer.stop(); check_and_reset_timer(); } 181126286Smtm 18298186Sgordon void reset_count_stat() { _count_pending_reset = true; } 18398186Sgordon void reset_time_stat() { _timer_pending_reset = true; } 18498186Sgordon 18598186Sgordon int* perf_recursion_counts_addr() { return _perf_recursion_counts; } 18698186Sgordon elapsedTimer* perf_timers_addr() { return _perf_timers; } 187169668Smtm}; 188169668Smtm 189169668Smtm// Thread snapshot to represent the thread state and statistics 190169668Smtmclass ThreadSnapshot : public CHeapObj<mtInternal> { 19178344Sobrienprivate: 192169668Smtm JavaThread* _thread; 193169668Smtm oop _threadObj; 194169668Smtm java_lang_Thread::ThreadStatus _thread_status; 195169668Smtm 196178776Smaxim bool _is_ext_suspended; 197178776Smaxim bool _is_in_native; 198178770Smtm 199169668Smtm jlong _contended_enter_ticks; 200178770Smtm jlong _contended_enter_count; 201178770Smtm jlong _monitor_wait_ticks; 202169668Smtm jlong _monitor_wait_count; 203178770Smtm jlong _sleep_ticks; 204178775Smaxim jlong _sleep_count; 205169668Smtm oop _blocker_object; 206169668Smtm oop _blocker_object_owner; 207169668Smtm 208169668Smtm ThreadStackTrace* _stack_trace; 209169668Smtm ThreadConcurrentLocks* _concurrent_locks; 210169668Smtm ThreadSnapshot* _next; 211169668Smtm 212169668Smtmpublic: 21398186Sgordon // Dummy snapshot 21498186Sgordon ThreadSnapshot() : _thread(NULL), _threadObj(NULL), _stack_trace(NULL), _concurrent_locks(NULL), _next(NULL), 21598186Sgordon _blocker_object(NULL), _blocker_object_owner(NULL) {}; 21698186Sgordon ThreadSnapshot(JavaThread* thread); 21798186Sgordon ~ThreadSnapshot(); 21878344Sobrien 21978344Sobrien java_lang_Thread::ThreadStatus thread_status() { return _thread_status; } 22098186Sgordon 22178344Sobrien oop threadObj() const { return _threadObj; } 22278344Sobrien 223126285Smtm void set_next(ThreadSnapshot* n) { _next = n; } 22478344Sobrien 22578344Sobrien bool is_ext_suspended() { return _is_ext_suspended; } 226126285Smtm bool is_in_native() { return _is_in_native; } 22778344Sobrien 22878344Sobrien jlong contended_enter_count() { return _contended_enter_count; } 229126285Smtm jlong contended_enter_ticks() { return _contended_enter_ticks; } 230126285Smtm jlong monitor_wait_count() { return _monitor_wait_count; } 231126285Smtm jlong monitor_wait_ticks() { return _monitor_wait_ticks; } 23278344Sobrien jlong sleep_count() { return _sleep_count; } 23378344Sobrien jlong sleep_ticks() { return _sleep_ticks; } 23498186Sgordon 23578344Sobrien 23678344Sobrien oop blocker_object() { return _blocker_object; } 23778344Sobrien oop blocker_object_owner() { return _blocker_object_owner; } 23878344Sobrien 23998186Sgordon ThreadSnapshot* next() const { return _next; } 24098186Sgordon ThreadStackTrace* get_stack_trace() { return _stack_trace; } 24178344Sobrien ThreadConcurrentLocks* get_concurrent_locks() { return _concurrent_locks; } 24298186Sgordon 24398186Sgordon void dump_stack_at_safepoint(int max_depth, bool with_locked_monitors); 24478344Sobrien void set_concurrent_locks(ThreadConcurrentLocks* l) { _concurrent_locks = l; } 24578344Sobrien void oops_do(OopClosure* f); 24678344Sobrien void metadata_do(void f(Metadata*)); 24778344Sobrien}; 24878344Sobrien 24998186Sgordonclass ThreadStackTrace : public CHeapObj<mtInternal> { 25078344Sobrien private: 25198186Sgordon JavaThread* _thread; 25278344Sobrien int _depth; // number of stack frames added 25378344Sobrien bool _with_locked_monitors; 254131061Smtm GrowableArray<StackFrameInfo*>* _frames; 25578344Sobrien GrowableArray<oop>* _jni_locked_monitors; 25678344Sobrien 25778344Sobrien public: 25878344Sobrien 259139949Skeramida ThreadStackTrace(JavaThread* thread, bool with_locked_monitors); 26078344Sobrien ~ThreadStackTrace(); 26178344Sobrien 26298186Sgordon JavaThread* thread() { return _thread; } 26378344Sobrien StackFrameInfo* stack_frame_at(int i) { return _frames->at(i); } 26478344Sobrien int get_stack_depth() { return _depth; } 26578344Sobrien 26698186Sgordon void add_stack_frame(javaVFrame* jvf); 26778344Sobrien void dump_stack_at_safepoint(int max_depth); 26898186Sgordon Handle allocate_fill_stack_trace_element_array(TRAPS); 26998186Sgordon void oops_do(OopClosure* f); 27078344Sobrien void metadata_do(void f(Metadata*)); 27178344Sobrien GrowableArray<oop>* jni_locked_monitors() { return _jni_locked_monitors; } 27278344Sobrien int num_jni_locked_monitors() { return (_jni_locked_monitors != NULL ? _jni_locked_monitors->length() : 0); } 27378344Sobrien 27498186Sgordon bool is_owned_monitor_on_stack(oop object); 27578344Sobrien void add_jni_locked_monitor(oop object) { _jni_locked_monitors->append(object); } 27698186Sgordon}; 27778344Sobrien 27898186Sgordon// StackFrameInfo for keeping Method* and bci during 27998186Sgordon// stack walking for later construction of StackTraceElement[] 28098186Sgordon// Java instances 28198186Sgordonclass StackFrameInfo : public CHeapObj<mtInternal> { 28298186Sgordon private: 28398186Sgordon Method* _method; 28498186Sgordon int _bci; 28598186Sgordon GrowableArray<oop>* _locked_monitors; // list of object monitors locked by this frame 28698186Sgordon // We need to save the mirrors in the backtrace to keep the class 28798186Sgordon // from being unloaded while we still have this stack trace. 28898186Sgordon oop _class_holder; 28998186Sgordon 29098186Sgordon public: 29198186Sgordon 292155719Sceri StackFrameInfo(javaVFrame* jvf, bool with_locked_monitors); 29398186Sgordon ~StackFrameInfo() { 29498186Sgordon if (_locked_monitors != NULL) { 29598186Sgordon delete _locked_monitors; 29698186Sgordon } 297157841Sflz }; 298157841Sflz Method* method() const { return _method; } 299157841Sflz int bci() const { return _bci; } 30098186Sgordon void oops_do(OopClosure* f); 30198186Sgordon void metadata_do(void f(Metadata*)); 30298186Sgordon 30398186Sgordon int num_locked_monitors() { return (_locked_monitors != NULL ? _locked_monitors->length() : 0); } 30498186Sgordon GrowableArray<oop>* locked_monitors() { return _locked_monitors; } 30598186Sgordon 30698186Sgordon void print_on(outputStream* st) const; 30798186Sgordon}; 30898186Sgordon 30998186Sgordonclass ThreadConcurrentLocks : public CHeapObj<mtInternal> { 31078344Sobrienprivate: 31198186Sgordon GrowableArray<instanceOop>* _owned_locks; 312242183Screes ThreadConcurrentLocks* _next; 313242183Screes JavaThread* _thread; 314170282Syar public: 315170282Syar ThreadConcurrentLocks(JavaThread* thread); 316170282Syar ~ThreadConcurrentLocks(); 317170282Syar 318170282Syar void add_lock(instanceOop o); 319170282Syar void set_next(ThreadConcurrentLocks* n) { _next = n; } 320170282Syar ThreadConcurrentLocks* next() { return _next; } 321170282Syar JavaThread* java_thread() { return _thread; } 322170282Syar GrowableArray<instanceOop>* owned_locks() { return _owned_locks; } 323170282Syar void oops_do(OopClosure* f); 324170282Syar}; 325170282Syar 326170282Syarclass ConcurrentLocksDump : public StackObj { 327170282Syar private: 328170282Syar ThreadConcurrentLocks* _map; 329170282Syar ThreadConcurrentLocks* _last; // Last ThreadConcurrentLocks in the map 330170282Syar bool _retain_map_on_free; 331170282Syar 332170282Syar void build_map(GrowableArray<oop>* aos_objects); 333170282Syar void add_lock(JavaThread* thread, instanceOop o); 334170282Syar 335170282Syar public: 33678344Sobrien ConcurrentLocksDump(bool retain_map_on_free) : _map(NULL), _last(NULL), _retain_map_on_free(retain_map_on_free) {}; 33798186Sgordon ConcurrentLocksDump() : _map(NULL), _last(NULL), _retain_map_on_free(false) {}; 338157841Sflz ~ConcurrentLocksDump(); 33998186Sgordon 34098186Sgordon void dump_at_safepoint(); 341245250Ssmh ThreadConcurrentLocks* thread_concurrent_locks(JavaThread* thread); 34298186Sgordon void print_locks_on(JavaThread* t, outputStream* st); 34398186Sgordon}; 34498186Sgordon 34598186Sgordonclass ThreadDumpResult : public StackObj { 346151426Sjhb private: 34798186Sgordon int _num_threads; 34898186Sgordon int _num_snapshots; 349161435Syar ThreadSnapshot* _snapshots; 350161436Syar ThreadSnapshot* _last; 351157657Sflz ThreadDumpResult* _next; 352161436Syar public: 353157657Sflz ThreadDumpResult(); 354157657Sflz ThreadDumpResult(int num_threads); 355157657Sflz ~ThreadDumpResult(); 356157657Sflz 35798186Sgordon void add_thread_snapshot(ThreadSnapshot* ts); 35898186Sgordon void set_next(ThreadDumpResult* next) { _next = next; } 35998186Sgordon ThreadDumpResult* next() { return _next; } 36098186Sgordon int num_threads() { return _num_threads; } 361114272Smtm int num_snapshots() { return _num_snapshots; } 36298186Sgordon ThreadSnapshot* snapshots() { return _snapshots; } 36398186Sgordon void oops_do(OopClosure* f); 36498186Sgordon void metadata_do(void f(Metadata*)); 365264243Sdteske}; 366264243Sdteske 367264243Sdteskeclass DeadlockCycle : public CHeapObj<mtInternal> { 368264243Sdteske private: 36998186Sgordon bool _is_deadlock; 370264243Sdteske GrowableArray<JavaThread*>* _threads; 371264243Sdteske DeadlockCycle* _next; 372264243Sdteske public: 373264243Sdteske DeadlockCycle(); 374264243Sdteske ~DeadlockCycle(); 375264243Sdteske 376264243Sdteske DeadlockCycle* next() { return _next; } 377264243Sdteske void set_next(DeadlockCycle* d) { _next = d; } 378264243Sdteske void add_thread(JavaThread* t) { _threads->append(t); } 379264243Sdteske void reset() { _is_deadlock = false; _threads->clear(); } 380264243Sdteske void set_deadlock(bool value) { _is_deadlock = value; } 381264243Sdteske bool is_deadlock() { return _is_deadlock; } 382264243Sdteske int num_threads() { return _threads->length(); } 383264243Sdteske GrowableArray<JavaThread*>* threads() { return _threads; } 384264243Sdteske void print_on(outputStream* st) const; 385264243Sdteske}; 386264243Sdteske 387264243Sdteske// Utility class to get list of java threads. 388264243Sdteskeclass ThreadsListEnumerator : public StackObj { 389264243Sdteskeprivate: 390264243Sdteske GrowableArray<instanceHandle>* _threads_array; 391264243Sdteskepublic: 392264243Sdteske ThreadsListEnumerator(Thread* cur_thread, 393264243Sdteske bool include_jvmti_agent_threads = false, 394264243Sdteske bool include_jni_attaching_threads = true); 395264243Sdteske int num_threads() { return _threads_array->length(); } 396264243Sdteske instanceHandle get_threadObj(int index) { return _threads_array->at(index); } 397264243Sdteske}; 398264243Sdteske 399264243Sdteske 400264243Sdteske// abstract utility class to set new thread states, and restore previous after the block exits 401264243Sdteskeclass JavaThreadStatusChanger : public StackObj { 402264243Sdteske private: 403264243Sdteske java_lang_Thread::ThreadStatus _old_state; 404264243Sdteske JavaThread* _java_thread; 405264243Sdteske bool _is_alive; 406264243Sdteske 407264243Sdteske void save_old_state(JavaThread* java_thread) { 408264243Sdteske _java_thread = java_thread; 409264243Sdteske _is_alive = is_alive(java_thread); 410264243Sdteske if (is_alive()) { 411264243Sdteske _old_state = java_lang_Thread::get_thread_status(_java_thread->threadObj()); 412264243Sdteske } 413264243Sdteske } 414264243Sdteske 415264243Sdteske public: 416264243Sdteske static void set_thread_status(JavaThread* java_thread, 417264243Sdteske java_lang_Thread::ThreadStatus state) { 418264243Sdteske java_lang_Thread::set_thread_status(java_thread->threadObj(), state); 419264243Sdteske } 420264243Sdteske 421264243Sdteske void set_thread_status(java_lang_Thread::ThreadStatus state) { 422264243Sdteske if (is_alive()) { 423264243Sdteske set_thread_status(_java_thread, state); 424264243Sdteske } 425264243Sdteske } 426264243Sdteske 427264243Sdteske JavaThreadStatusChanger(JavaThread* java_thread, 428264243Sdteske java_lang_Thread::ThreadStatus state) { 429264243Sdteske save_old_state(java_thread); 430264243Sdteske set_thread_status(state); 431264243Sdteske } 432264243Sdteske 433264243Sdteske JavaThreadStatusChanger(JavaThread* java_thread) { 434264243Sdteske save_old_state(java_thread); 435264243Sdteske } 436264243Sdteske 437264243Sdteske ~JavaThreadStatusChanger() { 438264243Sdteske set_thread_status(_old_state); 439264243Sdteske } 440264243Sdteske 441264243Sdteske static bool is_alive(JavaThread* java_thread) { 442264243Sdteske return java_thread != NULL && java_thread->threadObj() != NULL; 443264243Sdteske } 444264243Sdteske 445264243Sdteske bool is_alive() { 446264243Sdteske return _is_alive; 447264243Sdteske } 448264243Sdteske}; 449264243Sdteske 450264243Sdteske// Change status to waiting on an object (timed or indefinite) 451264243Sdteskeclass JavaThreadInObjectWaitState : public JavaThreadStatusChanger { 452264243Sdteske private: 453264243Sdteske ThreadStatistics* _stat; 454264243Sdteske bool _active; 455264243Sdteske 456264243Sdteske public: 457264243Sdteske JavaThreadInObjectWaitState(JavaThread *java_thread, bool timed) : 458264243Sdteske JavaThreadStatusChanger(java_thread, 459264243Sdteske timed ? java_lang_Thread::IN_OBJECT_WAIT_TIMED : java_lang_Thread::IN_OBJECT_WAIT) { 460264243Sdteske if (is_alive()) { 461264243Sdteske _stat = java_thread->get_thread_stat(); 462264243Sdteske _active = ThreadService::is_thread_monitoring_contention(); 463264243Sdteske _stat->monitor_wait(); 464264243Sdteske if (_active) { 465264243Sdteske _stat->monitor_wait_begin(); 466264243Sdteske } 467264243Sdteske } else { 468264243Sdteske _active = false; 469264243Sdteske } 470264243Sdteske } 471264243Sdteske 472264243Sdteske ~JavaThreadInObjectWaitState() { 473264243Sdteske if (_active) { 474264243Sdteske _stat->monitor_wait_end(); 475264243Sdteske } 476264243Sdteske } 477264243Sdteske}; 478264243Sdteske 479264243Sdteske// Change status to parked (timed or indefinite) 480264243Sdteskeclass JavaThreadParkedState : public JavaThreadStatusChanger { 481264243Sdteske private: 482264243Sdteske ThreadStatistics* _stat; 483264243Sdteske bool _active; 484264243Sdteske 485264243Sdteske public: 486264243Sdteske JavaThreadParkedState(JavaThread *java_thread, bool timed) : 487264243Sdteske JavaThreadStatusChanger(java_thread, 488264243Sdteske timed ? java_lang_Thread::PARKED_TIMED : java_lang_Thread::PARKED) { 489264243Sdteske if (is_alive()) { 490264243Sdteske _stat = java_thread->get_thread_stat(); 491264243Sdteske _active = ThreadService::is_thread_monitoring_contention(); 492264243Sdteske _stat->monitor_wait(); 493264243Sdteske if (_active) { 494264243Sdteske _stat->monitor_wait_begin(); 495264243Sdteske } 496264243Sdteske } else { 497264243Sdteske _active = false; 498264243Sdteske } 499264243Sdteske } 500264243Sdteske 501264243Sdteske ~JavaThreadParkedState() { 502264243Sdteske if (_active) { 503264243Sdteske _stat->monitor_wait_end(); 504264243Sdteske } 505264243Sdteske } 506264243Sdteske}; 507264243Sdteske 508264243Sdteske// Change status to blocked on (re-)entering a synchronization block 509264243Sdteskeclass JavaThreadBlockedOnMonitorEnterState : public JavaThreadStatusChanger { 510264243Sdteske private: 511264243Sdteske ThreadStatistics* _stat; 512264243Sdteske bool _active; 513264243Sdteske 514264243Sdteske static bool contended_enter_begin(JavaThread *java_thread) { 515264243Sdteske set_thread_status(java_thread, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 516264243Sdteske ThreadStatistics* stat = java_thread->get_thread_stat(); 517264243Sdteske stat->contended_enter(); 518264243Sdteske bool active = ThreadService::is_thread_monitoring_contention(); 519264243Sdteske if (active) { 520264243Sdteske stat->contended_enter_begin(); 521264243Sdteske } 522264243Sdteske return active; 523264243Sdteske } 524264243Sdteske 525264243Sdteske public: 526264243Sdteske // java_thread is waiting thread being blocked on monitor reenter. 527264243Sdteske // Current thread is the notifying thread which holds the monitor. 528264243Sdteske static bool wait_reenter_begin(JavaThread *java_thread, ObjectMonitor *obj_m) { 529264243Sdteske assert((java_thread != NULL), "Java thread should not be null here"); 530264243Sdteske bool active = false; 531264243Sdteske if (is_alive(java_thread) && ServiceUtil::visible_oop((oop)obj_m->object())) { 532264243Sdteske active = contended_enter_begin(java_thread); 533264243Sdteske } 534264243Sdteske return active; 535264243Sdteske } 536264243Sdteske 537264243Sdteske static void wait_reenter_end(JavaThread *java_thread, bool active) { 538264243Sdteske if (active) { 539264243Sdteske java_thread->get_thread_stat()->contended_enter_end(); 540264243Sdteske } 541264243Sdteske set_thread_status(java_thread, java_lang_Thread::RUNNABLE); 542264243Sdteske } 543264243Sdteske 544264243Sdteske JavaThreadBlockedOnMonitorEnterState(JavaThread *java_thread, ObjectMonitor *obj_m) : 545264243Sdteske JavaThreadStatusChanger(java_thread) { 546264243Sdteske assert((java_thread != NULL), "Java thread should not be null here"); 547264243Sdteske // Change thread status and collect contended enter stats for monitor contended 548264243Sdteske // enter done for external java world objects and it is contended. All other cases 549264243Sdteske // like for vm internal objects and for external objects which are not contended 550264243Sdteske // thread status is not changed and contended enter stat is not collected. 551264243Sdteske _active = false; 552264243Sdteske if (is_alive() && ServiceUtil::visible_oop((oop)obj_m->object()) && obj_m->contentions() > 0) { 553264243Sdteske _stat = java_thread->get_thread_stat(); 554264243Sdteske _active = contended_enter_begin(java_thread); 555264243Sdteske } 556264243Sdteske } 557264243Sdteske 558264243Sdteske ~JavaThreadBlockedOnMonitorEnterState() { 559264243Sdteske if (_active) { 560264243Sdteske _stat->contended_enter_end(); 561264243Sdteske } 562264243Sdteske } 563264243Sdteske}; 564264243Sdteske 565264243Sdteske// Change status to sleeping 566264243Sdteskeclass JavaThreadSleepState : public JavaThreadStatusChanger { 567264243Sdteske private: 568264243Sdteske ThreadStatistics* _stat; 569264243Sdteske bool _active; 570264243Sdteske public: 571264243Sdteske JavaThreadSleepState(JavaThread *java_thread) : 572264243Sdteske JavaThreadStatusChanger(java_thread, java_lang_Thread::SLEEPING) { 573264243Sdteske if (is_alive()) { 574264243Sdteske _stat = java_thread->get_thread_stat(); 575264243Sdteske _active = ThreadService::is_thread_monitoring_contention(); 576264243Sdteske _stat->thread_sleep(); 577264243Sdteske if (_active) { 578264243Sdteske _stat->thread_sleep_begin(); 579264243Sdteske } 580264243Sdteske } else { 581264243Sdteske _active = false; 582264243Sdteske } 583264243Sdteske } 584264243Sdteske 585264243Sdteske ~JavaThreadSleepState() { 586264243Sdteske if (_active) { 587264243Sdteske _stat->thread_sleep_end(); 588264243Sdteske } 589264243Sdteske } 590264243Sdteske}; 591264243Sdteske 592264243Sdteske#endif // SHARE_VM_SERVICES_THREADSERVICE_HPP 593264243Sdteske