Mercurial > hg > heapstats
changeset 247:33a77b567b62
Bug 3293: [REFACTORING] Realtime deadlock detector implementation
Reviewed-by: ykubota
https://github.com/HeapStats/heapstats/pull/115
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--- a/ChangeLog Mon Jul 24 21:16:53 2017 +0900 +++ b/ChangeLog Wed Aug 02 14:46:00 2017 +0900 @@ -1,3 +1,7 @@ +2017-08-02 Yasumasa Suenaga <yasuenag@gmail.com> + + * Bug 3293: [REFACTORING] Realtime deadlock detector implementation + 2017-07-24 Yasumasa Suenaga <yasuenag@gmail.com> * Bug 3429: [REGRESSION] Cannot build HeapStats Agent on RHEL
--- a/agent/heapstats.conf.in Mon Jul 24 21:16:53 2017 +0900 +++ b/agent/heapstats.conf.in Wed Aug 02 14:46:00 2017 +0900 @@ -18,8 +18,6 @@ trigger_on_dump=true # deadlock check -# This feature is experimental. It might be a cause of HotSpot internal error -# when you set this flag to true. check_deadlock=false # Trigger logging setting
--- a/agent/src/heapstats-engines/Makefile.am Mon Jul 24 21:16:53 2017 +0900 +++ b/agent/src/heapstats-engines/Makefile.am Wed Aug 02 14:46:00 2017 +0900 @@ -6,7 +6,7 @@ snapShotContainer.cpp classContainer.cpp gcWatcher.cpp \ logMain.cpp jvmSockCmd.cpp signalManager.cpp logManager.cpp \ archiveMaker.cpp cmdArchiver.cpp fsUtil.cpp \ - jniZipArchiver.cpp deadlockFinder.cpp vmVariables.cpp \ + jniZipArchiver.cpp deadlockDetector.cpp vmVariables.cpp \ vmFunctions.cpp configuration.cpp overrider.cpp \ threadRecorder.cpp heapstatsMBean.cpp overrideFunc.S \ trapSender.cpp
--- a/agent/src/heapstats-engines/Makefile.in Mon Jul 24 21:16:53 2017 +0900 +++ b/agent/src/heapstats-engines/Makefile.in Wed Aug 02 14:46:00 2017 +0900 @@ -125,7 +125,7 @@ classContainer.cpp gcWatcher.cpp logMain.cpp jvmSockCmd.cpp \ signalManager.cpp logManager.cpp archiveMaker.cpp \ cmdArchiver.cpp fsUtil.cpp jniZipArchiver.cpp \ - deadlockFinder.cpp vmVariables.cpp vmFunctions.cpp \ + deadlockDetector.cpp vmVariables.cpp vmFunctions.cpp \ configuration.cpp overrider.cpp threadRecorder.cpp \ heapstatsMBean.cpp overrideFunc.S trapSender.cpp pcreRegex.cpp \ arch/x86/x86BitMapMarker.cpp \ @@ -154,7 +154,7 @@ libheapstats_engine_avx_2_0_so-cmdArchiver.$(OBJEXT) \ libheapstats_engine_avx_2_0_so-fsUtil.$(OBJEXT) \ libheapstats_engine_avx_2_0_so-jniZipArchiver.$(OBJEXT) \ - libheapstats_engine_avx_2_0_so-deadlockFinder.$(OBJEXT) \ + libheapstats_engine_avx_2_0_so-deadlockDetector.$(OBJEXT) \ libheapstats_engine_avx_2_0_so-vmVariables.$(OBJEXT) \ libheapstats_engine_avx_2_0_so-vmFunctions.$(OBJEXT) \ libheapstats_engine_avx_2_0_so-configuration.$(OBJEXT) \ @@ -183,7 +183,7 @@ classContainer.cpp gcWatcher.cpp logMain.cpp jvmSockCmd.cpp \ signalManager.cpp logManager.cpp archiveMaker.cpp \ cmdArchiver.cpp fsUtil.cpp jniZipArchiver.cpp \ - deadlockFinder.cpp vmVariables.cpp vmFunctions.cpp \ + deadlockDetector.cpp vmVariables.cpp vmFunctions.cpp \ configuration.cpp overrider.cpp threadRecorder.cpp \ heapstatsMBean.cpp overrideFunc.S trapSender.cpp pcreRegex.cpp \ arch/arm/armBitMapMarker.cpp \ @@ -211,7 +211,7 @@ libheapstats_engine_neon_2_0_so-cmdArchiver.$(OBJEXT) \ libheapstats_engine_neon_2_0_so-fsUtil.$(OBJEXT) \ libheapstats_engine_neon_2_0_so-jniZipArchiver.$(OBJEXT) \ - libheapstats_engine_neon_2_0_so-deadlockFinder.$(OBJEXT) \ + libheapstats_engine_neon_2_0_so-deadlockDetector.$(OBJEXT) \ libheapstats_engine_neon_2_0_so-vmVariables.$(OBJEXT) \ libheapstats_engine_neon_2_0_so-vmFunctions.$(OBJEXT) \ libheapstats_engine_neon_2_0_so-configuration.$(OBJEXT) \ @@ -238,7 +238,7 @@ classContainer.cpp gcWatcher.cpp logMain.cpp jvmSockCmd.cpp \ signalManager.cpp logManager.cpp archiveMaker.cpp \ cmdArchiver.cpp fsUtil.cpp jniZipArchiver.cpp \ - deadlockFinder.cpp vmVariables.cpp vmFunctions.cpp \ + deadlockDetector.cpp vmVariables.cpp vmFunctions.cpp \ configuration.cpp overrider.cpp threadRecorder.cpp \ heapstatsMBean.cpp overrideFunc.S trapSender.cpp pcreRegex.cpp \ arch/arm/armBitMapMarker.cpp arch/x86/x86BitMapMarker.cpp @@ -265,7 +265,7 @@ libheapstats_engine_none_2_0_so-cmdArchiver.$(OBJEXT) \ libheapstats_engine_none_2_0_so-fsUtil.$(OBJEXT) \ libheapstats_engine_none_2_0_so-jniZipArchiver.$(OBJEXT) \ - libheapstats_engine_none_2_0_so-deadlockFinder.$(OBJEXT) \ + libheapstats_engine_none_2_0_so-deadlockDetector.$(OBJEXT) \ libheapstats_engine_none_2_0_so-vmVariables.$(OBJEXT) \ libheapstats_engine_none_2_0_so-vmFunctions.$(OBJEXT) \ libheapstats_engine_none_2_0_so-configuration.$(OBJEXT) \ @@ -294,7 +294,7 @@ classContainer.cpp gcWatcher.cpp logMain.cpp jvmSockCmd.cpp \ signalManager.cpp logManager.cpp archiveMaker.cpp \ cmdArchiver.cpp fsUtil.cpp jniZipArchiver.cpp \ - deadlockFinder.cpp vmVariables.cpp vmFunctions.cpp \ + deadlockDetector.cpp vmVariables.cpp vmFunctions.cpp \ configuration.cpp overrider.cpp threadRecorder.cpp \ heapstatsMBean.cpp overrideFunc.S trapSender.cpp pcreRegex.cpp \ arch/x86/x86BitMapMarker.cpp \ @@ -322,7 +322,7 @@ libheapstats_engine_sse2_2_0_so-cmdArchiver.$(OBJEXT) \ libheapstats_engine_sse2_2_0_so-fsUtil.$(OBJEXT) \ libheapstats_engine_sse2_2_0_so-jniZipArchiver.$(OBJEXT) \ - libheapstats_engine_sse2_2_0_so-deadlockFinder.$(OBJEXT) \ + libheapstats_engine_sse2_2_0_so-deadlockDetector.$(OBJEXT) \ libheapstats_engine_sse2_2_0_so-vmVariables.$(OBJEXT) \ libheapstats_engine_sse2_2_0_so-vmFunctions.$(OBJEXT) \ libheapstats_engine_sse2_2_0_so-configuration.$(OBJEXT) \ @@ -349,7 +349,7 @@ classContainer.cpp gcWatcher.cpp logMain.cpp jvmSockCmd.cpp \ signalManager.cpp logManager.cpp archiveMaker.cpp \ cmdArchiver.cpp fsUtil.cpp jniZipArchiver.cpp \ - deadlockFinder.cpp vmVariables.cpp vmFunctions.cpp \ + deadlockDetector.cpp vmVariables.cpp vmFunctions.cpp \ configuration.cpp overrider.cpp threadRecorder.cpp \ heapstatsMBean.cpp overrideFunc.S trapSender.cpp pcreRegex.cpp \ arch/x86/x86BitMapMarker.cpp \ @@ -377,7 +377,7 @@ libheapstats_engine_sse3_2_0_so-cmdArchiver.$(OBJEXT) \ libheapstats_engine_sse3_2_0_so-fsUtil.$(OBJEXT) \ libheapstats_engine_sse3_2_0_so-jniZipArchiver.$(OBJEXT) \ - libheapstats_engine_sse3_2_0_so-deadlockFinder.$(OBJEXT) \ + libheapstats_engine_sse3_2_0_so-deadlockDetector.$(OBJEXT) \ libheapstats_engine_sse3_2_0_so-vmVariables.$(OBJEXT) \ libheapstats_engine_sse3_2_0_so-vmFunctions.$(OBJEXT) \ libheapstats_engine_sse3_2_0_so-configuration.$(OBJEXT) \ @@ -404,7 +404,7 @@ classContainer.cpp gcWatcher.cpp logMain.cpp jvmSockCmd.cpp \ signalManager.cpp logManager.cpp archiveMaker.cpp \ cmdArchiver.cpp fsUtil.cpp jniZipArchiver.cpp \ - deadlockFinder.cpp vmVariables.cpp vmFunctions.cpp \ + deadlockDetector.cpp vmVariables.cpp vmFunctions.cpp \ configuration.cpp overrider.cpp threadRecorder.cpp \ heapstatsMBean.cpp overrideFunc.S trapSender.cpp pcreRegex.cpp \ arch/x86/x86BitMapMarker.cpp \ @@ -432,7 +432,7 @@ libheapstats_engine_sse4_2_0_so-cmdArchiver.$(OBJEXT) \ libheapstats_engine_sse4_2_0_so-fsUtil.$(OBJEXT) \ libheapstats_engine_sse4_2_0_so-jniZipArchiver.$(OBJEXT) \ - libheapstats_engine_sse4_2_0_so-deadlockFinder.$(OBJEXT) \ + libheapstats_engine_sse4_2_0_so-deadlockDetector.$(OBJEXT) \ libheapstats_engine_sse4_2_0_so-vmVariables.$(OBJEXT) \ libheapstats_engine_sse4_2_0_so-vmFunctions.$(OBJEXT) \ libheapstats_engine_sse4_2_0_so-configuration.$(OBJEXT) \ @@ -662,7 +662,7 @@ snapShotProcessor.cpp snapShotContainer.cpp classContainer.cpp \ gcWatcher.cpp logMain.cpp jvmSockCmd.cpp signalManager.cpp \ logManager.cpp archiveMaker.cpp cmdArchiver.cpp fsUtil.cpp \ - jniZipArchiver.cpp deadlockFinder.cpp vmVariables.cpp \ + jniZipArchiver.cpp deadlockDetector.cpp vmVariables.cpp \ vmFunctions.cpp configuration.cpp overrider.cpp \ threadRecorder.cpp heapstatsMBean.cpp overrideFunc.S \ trapSender.cpp $(am__append_1) @@ -871,7 +871,7 @@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_avx_2_0_so-classContainer.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_avx_2_0_so-cmdArchiver.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_avx_2_0_so-configuration.Po@am__quote@ -@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_avx_2_0_so-deadlockFinder.Po@am__quote@ +@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_avx_2_0_so-deadlockDetector.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_avx_2_0_so-fsUtil.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_avx_2_0_so-gcWatcher.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_avx_2_0_so-heapstatsMBean.Po@am__quote@ @@ -903,7 +903,7 @@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_neon_2_0_so-classContainer.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_neon_2_0_so-cmdArchiver.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_neon_2_0_so-configuration.Po@am__quote@ -@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_neon_2_0_so-deadlockFinder.Po@am__quote@ +@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_neon_2_0_so-deadlockDetector.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_neon_2_0_so-fsUtil.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_neon_2_0_so-gcWatcher.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_neon_2_0_so-heapstatsMBean.Po@am__quote@ @@ -935,7 +935,7 @@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_none_2_0_so-classContainer.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_none_2_0_so-cmdArchiver.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_none_2_0_so-configuration.Po@am__quote@ -@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_none_2_0_so-deadlockFinder.Po@am__quote@ +@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_none_2_0_so-deadlockDetector.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_none_2_0_so-fsUtil.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_none_2_0_so-gcWatcher.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_none_2_0_so-heapstatsMBean.Po@am__quote@ @@ -967,7 +967,7 @@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse2_2_0_so-classContainer.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse2_2_0_so-cmdArchiver.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse2_2_0_so-configuration.Po@am__quote@ -@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse2_2_0_so-deadlockFinder.Po@am__quote@ +@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse2_2_0_so-deadlockDetector.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse2_2_0_so-fsUtil.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse2_2_0_so-gcWatcher.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse2_2_0_so-heapstatsMBean.Po@am__quote@ @@ -999,7 +999,7 @@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse3_2_0_so-classContainer.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse3_2_0_so-cmdArchiver.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse3_2_0_so-configuration.Po@am__quote@ -@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse3_2_0_so-deadlockFinder.Po@am__quote@ +@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse3_2_0_so-deadlockDetector.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse3_2_0_so-fsUtil.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse3_2_0_so-gcWatcher.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse3_2_0_so-heapstatsMBean.Po@am__quote@ @@ -1031,7 +1031,7 @@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse4_2_0_so-classContainer.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse4_2_0_so-cmdArchiver.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse4_2_0_so-configuration.Po@am__quote@ -@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse4_2_0_so-deadlockFinder.Po@am__quote@ +@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse4_2_0_so-deadlockDetector.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse4_2_0_so-fsUtil.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse4_2_0_so-gcWatcher.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libheapstats_engine_sse4_2_0_so-heapstatsMBean.Po@am__quote@ @@ -1495,19 +1495,19 @@ @AMDEP_TRUE@@am__fastdepCXX_FALSE@ DEPDIR=$(DEPDIR) $(CXXDEPMODE) $(depcomp) @AMDEPBACKSLASH@ @am__fastdepCXX_FALSE@ $(AM_V_CXX@am__nodep@)$(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) 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--- a/agent/src/heapstats-engines/configuration.cpp Mon Jul 24 21:16:53 2017 +0900 +++ b/agent/src/heapstats-engines/configuration.cpp Wed Aug 02 14:46:00 2017 +0900 @@ -462,7 +462,7 @@ triggerOnDump->get() ? "true" : "false"); /* Output status of deadlock check. */ - logger->printInfoMsg("Deadlock check (experimental feature) = %s", + logger->printInfoMsg("Deadlock check = %s", checkDeadlock->get() ? "true" : "false"); /* Output status of logging triggers. */
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/heapstats-engines/deadlockDetector.cpp Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,355 @@ +/*! + * \file deadlockDetector.cpp + * \brief This file is used by find deadlock. + * Copyright (C) 2017 Yasumasa Suenaga + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + * + */ + +#include <jvmti.h> +#include <jni.h> + +#include <pthread.h> +#include <sched.h> + +#ifdef HAVE_ATOMIC +#include <atomic> +#else +#include <cstdatomic> +#endif + +#include <map> + +#include "globals.hpp" +#include "elapsedTimer.hpp" +#include "libmain.hpp" +#include "callbackRegister.hpp" +#include "deadlockDetector.hpp" + + +#define BUFFER_SZ 256 + + +/*! + * \brief Processing flag. + */ +static std::atomic_int processing(0); + +/*! + * \brief Monitor owner map. + */ +static std::map<jint, jint> monitor_owners; + +/*! + * \brief Monitor waiters list. + */ +static std::map<jint, jint> waiter_list; + +/*! + * \brief Mutex for maps + */ +static pthread_mutex_t mutex = PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP; + + +namespace dldetector { + + /*! + * \brief Send SNMP Trap which contains deadlock information. + * \param nowTime [in] The time of deadlock occurred. + * \param numThreads [in] Number of threads which are related to deadlock. + * \param name [in] Thread name of deadlock occurred. + */ + static void sendSNMPTrap(TMSecTime nowTime, + int numThreads, const char *name) { + /* OIDs */ + char trapOID[50] = OID_DEADLOCKALERT; + oid OID_ALERT_DATE[] = {SNMP_OID_HEAPALERT, 1}; + oid OID_DEAD_COUNT[] = {SNMP_OID_DEADLOCKALERT, 1}; + oid OID_DEAD_NAME[] = {SNMP_OID_DEADLOCKALERT, 2}; + + char buf[BUFFER_SZ]; + + TTrapSender sender; + sender.setSysUpTime(); + sender.setTrapOID(trapOID); + + /* Set alert datetime. */ + snprintf(buf, BUFFER_SZ - 1, "%llu", nowTime); + sender.addValue(OID_ALERT_DATE, OID_LENGTH(OID_ALERT_DATE), buf, + SNMP_VAR_TYPE_COUNTER64); + + /* Set thread count. */ + snprintf(buf, BUFFER_SZ - 1, "%d", numThreads); + sender.addValue(OID_DEAD_COUNT, OID_LENGTH(OID_DEAD_COUNT), buf, + SNMP_VAR_TYPE_COUNTER32); + + /* Set thread name. */ + sender.addValue(OID_DEAD_NAME, OID_LENGTH(OID_DEAD_NAME), name, + SNMP_VAR_TYPE_STRING); + + /* Send trap. */ + if (unlikely(sender.sendTrap() != SNMP_PROC_SUCCESS)) { + /* Ouput message and clean up. */ + sender.clearValues(); + logger->printWarnMsg("Could not send SNMP trap for deadlock!"); + } + } + + /*! + * \brief Notify deadlock occurrence via stdout/err and SNMP Trap. + * \param jvmti [in] JVMTI environment. + * \oaram env [in] JNI environment. + * \param thread [in] jthread object which deadlock triggered. + * \param monitor [in] Monitor object. + * \param numThreads [in] Number of threads which are related to deadlock. + */ + static void notifyDeadlockOccurrence(jvmtiEnv *jvmti, JNIEnv *env, + jthread thread, jobject monitor, + int numThreads) { + TProcessMark mark(processing); + + TMSecTime nowTime = (TMSecTime)getNowTimeSec(); + + jvmtiThreadInfo threadInfo = {0}; + jvmti->GetThreadInfo(thread, &threadInfo); + + logger->printCritMsg( + "ALERT(DEADLOCK): Deadlock occurred! count: %d, thread: \"%s\"", + numThreads, threadInfo.name); + + if (conf->SnmpSend()->get()) { + sendSNMPTrap(nowTime, numThreads, threadInfo.name); + } + + jvmti->Deallocate((unsigned char *)threadInfo.name); + + if (conf->TriggerOnLogLock()->get()) { + TElapsedTimer elapsedTime("Take LogInfo"); + int result = logManager->collectLog(jvmti, env, + OccurredDeadlock, nowTime, ""); + if (unlikely(result != 0)) { + logger->printWarnMsg("Could not collect log archive."); + } + } + + if (unlikely(conf->KillOnError()->get())) { + forcedAbortJVM(jvmti, env, "deadlock occurred"); + } + } + + /*! + * \brief Event handler of JVMTI MonitorContendedEnter for finding deadlock. + * \param jvmti [in] JVMTI environment. + * \param env [in] JNI environment of the event (current) thread. + * \param thread [in] JNI local reference to the thread attempting to enter + * the monitor. + * \param object [in] JNI local reference to the monitor. + */ + void JNICALL OnMonitorContendedEnter( + jvmtiEnv *jvmti, JNIEnv *env, jthread thread, jobject object) { + /* Check owned monitors */ + jint monitor_cnt; + jobject *owned_monitors; + if (isError(jvmti, jvmti->GetOwnedMonitorInfo(thread, + &monitor_cnt, + &owned_monitors))) { + logger->printWarnMsg("Could not get owned monitor info (%p)\n", + *(void **)thread); + return; + } + if (monitor_cnt == 0) { // This thread does not have a monitor. + jvmti->Deallocate((unsigned char *)owned_monitors); + return; + } + + jint monitor_hash; + jint thread_hash; + jvmti->GetObjectHashCode(thread, &thread_hash); + jvmti->GetObjectHashCode(object, &monitor_hash); + + ENTER_PTHREAD_SECTION(&mutex); + { + /* Avoid JDK-8185164 */ + bool canSkip = true; + + /* Store all owned monitors to owner list */ + for (int idx = 0; idx < monitor_cnt; idx++) { + jint current_monitor_hash; + jvmti->GetObjectHashCode(owned_monitors[idx], ¤t_monitor_hash); + if (current_monitor_hash == monitor_hash) { + continue; + } + monitor_owners[current_monitor_hash] = thread_hash; + canSkip = false; + } + jvmti->Deallocate((unsigned char *)owned_monitors); + + if (!canSkip) { + /* Add to waiters list */ + jvmti->GetObjectHashCode(object, &monitor_hash); + waiter_list[thread_hash] = monitor_hash; + + /* Check deadlock */ + int numThreads = 1; + while (true) { + numThreads++; + + auto owner_itr = monitor_owners.find(monitor_hash); + if (owner_itr == monitor_owners.end()) { + break; // No deadlock + } + + auto waiter_itr = waiter_list.find(owner_itr->second); + if (waiter_itr == waiter_list.end()) { + break; // No deadlock + } + + owner_itr = monitor_owners.find(waiter_itr->second); + if (owner_itr == monitor_owners.end()) { + break; // No deadlock + } + + if (owner_itr->second == thread_hash) { + // Deadlock!! + notifyDeadlockOccurrence(jvmti, env, thread, object, numThreads); + break; + } + + monitor_hash = waiter_itr->second; + } + } + } + EXIT_PTHREAD_SECTION(&mutex); + } + + + /*! + * \brief Event handler of JVMTI MonitorContendedEntered for finding deadlock. + * \param jvmti [in] JVMTI environment. + * \param env [in] JNI environment of the event (current) thread. + * \param thread [in] JNI local reference to the thread attempting to enter + * the monitor. + * \param object [in] JNI local reference to the monitor. + */ + void JNICALL OnMonitorContendedEntered( + jvmtiEnv *jvmti, JNIEnv *env, jthread thread, jobject object) { + /* Check owned monitors */ + jint monitor_cnt; + jobject *owned_monitors; + if (isError(jvmti, jvmti->GetOwnedMonitorInfo(thread, + &monitor_cnt, + &owned_monitors))) { + logger->printWarnMsg("Could not get owned monitor info (%p)\n", + *(void **)thread); + return; + } + if (monitor_cnt <= 1) { // This thread does not have other monitor(s). + jvmti->Deallocate((unsigned char *)owned_monitors); + return; + } + + ENTER_PTHREAD_SECTION(&mutex); + { + /* Remove all owned monitors from owner list */ + for (int idx = 0; idx < monitor_cnt; idx++) { + jint monitor_hash; + jvmti->GetObjectHashCode(owned_monitors[idx], &monitor_hash); + monitor_owners.erase(monitor_hash); + } + jvmti->Deallocate((unsigned char *)owned_monitors); + + /* Remove thread from waiters list */ + jint thread_hash; + jvmti->GetObjectHashCode(thread, &thread_hash); + waiter_list.erase(thread_hash); + } + EXIT_PTHREAD_SECTION(&mutex); + } + + + /*! + * \brief Deadlock detector initializer. + * \param jvmti [in] JVMTI environment + * \parma isOnLoad [in] OnLoad phase or not (Live phase). + * \return Process result. + * \warning This function MUST be called only once. + */ + bool initialize(jvmtiEnv *jvmti, bool isOnLoad) { + jvmtiCapabilities capabilities = {0}; + capabilities.can_get_monitor_info = 1; + if (isOnLoad) { + /* + * can_get_owned_monitor_info must be set at OnLoad phase. + * + * See also: + * hotspot/src/share/vm/prims/jvmtiManageCapabilities.cpp + */ + capabilities.can_get_owned_monitor_info = 1; + } + TMonitorContendedEnterCallback::mergeCapabilities(&capabilities); + if (isError(jvmti, jvmti->AddCapabilities(&capabilities))) { + logger->printCritMsg( + "Couldn't set event capabilities for deadlock detector."); + return false; + } + + /* + * All JVMTI events are not fired at this point. + * So we need not to lock this operation. + */ + monitor_owners.clear(); + waiter_list.clear(); + + TMonitorContendedEnterCallback::registerCallback(&OnMonitorContendedEnter); + TMonitorContendedEnterCallback::switchEventNotification(jvmti, + JVMTI_ENABLE); + TMonitorContendedEnteredCallback::registerCallback( + &OnMonitorContendedEntered); + TMonitorContendedEnteredCallback::switchEventNotification(jvmti, + JVMTI_ENABLE); + + return true; + } + + /*! + * \brief Deadlock detector finalizer. + * This function unregisters JVMTI callback for deadlock detection. + * \param jvmti [in] JVMTI environment + */ + void finalize(jvmtiEnv *jvmti) { + TMonitorContendedEnterCallback::unregisterCallback( + &OnMonitorContendedEnter); + TMonitorContendedEnteredCallback::unregisterCallback( + &OnMonitorContendedEntered); + + /* Refresh JVMTI event callbacks */ + registerJVMTICallbacks(jvmti); + + while (processing > 0) { + sched_yield(); + } + + ENTER_PTHREAD_SECTION(&mutex); + { + monitor_owners.clear(); + waiter_list.clear(); + } + EXIT_PTHREAD_SECTION(&mutex); + } + +} +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/heapstats-engines/deadlockDetector.hpp Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,72 @@ +/*! + * \file deadlockDetector.hpp + * \brief This file is used by find deadlock. + * Copyright (C) 2017 Yasumasa Suenaga + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + * + */ + +#ifndef _DEADLOCK_DETECTOR_H +#define _DEADLOCK_DETECTOR_H + +#include <jvmti.h> +#include <jni.h> + + +namespace dldetector { + + /*! + * \brief Event handler of JVMTI MonitorContendedEnter for finding deadlock. + * \param jvmti [in] JVMTI environment. + * \param env [in] JNI environment of the event (current) thread. + * \param thread [in] JNI local reference to the thread attempting to enter + * the monitor. + * \param object [in] JNI local reference to the monitor. + */ + void JNICALL OnMonitorContendedEnter(jvmtiEnv *jvmti, JNIEnv *env, + jthread thread, jobject object); + + /*! + * \brief Event handler of JVMTI MonitorContendedEntered for finding deadlock. + * \param jvmti [in] JVMTI environment. + * \param env [in] JNI environment of the event (current) thread. + * \param thread [in] JNI local reference to the thread attempting to enter + * the monitor. + * \param object [in] JNI local reference to the monitor. + */ + void JNICALL OnMonitorContendedEntered(jvmtiEnv *jvmti, JNIEnv *env, + jthread thread, jobject object); + + /*! + * \brief Deadlock detector initializer. + * \param jvmti [in] JVMTI environment + * \param isOnLoad [in] OnLoad phase or not (Live phase). + * \return Process result. + * \warning This function MUST be called only once. + */ + bool initialize(jvmtiEnv *jvmti, bool isOnLoad); + + /*! + * \brief Deadlock detector finalizer. + * This function unregisters JVMTI callback for deadlock detection. + * \param jvmti [in] JVMTI environment + */ + void finalize(jvmtiEnv *jvmti); + +}; + +#endif // _DEADLOCK_DETECTOR_H
--- a/agent/src/heapstats-engines/deadlockFinder.cpp Mon Jul 24 21:16:53 2017 +0900 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,687 +0,0 @@ -/*! - * \file deadlockFinder.cpp - * \brief This file is used by find deadlock. - * Copyright (C) 2011-2017 Nippon Telegraph and Telephone Corporation - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - */ - -#include <sys/syscall.h> - -#include "globals.hpp" -#include "vmFunctions.hpp" -#include "vmVariables.hpp" -#include "libmain.hpp" -#include "deadlockFinder.hpp" - -/* Defines. */ - -/*! - * \brief Thread state macro.<br> - * This value means the thread is existing on native code.<br> - * Definition of "enum JavaThreadState". - * (_thread_in_native state is used in JVMTI:JvmtiThreadEventTransition) - * \sa hotspot/src/share/vm/utilities/globalDefinitions.hpp - */ -#define THREAD_IN_NATIVE 4 - -/*! - * \brief Thread state macro.<br> - * This value means the thread is existing on VM.<br> - * Definition of "enum JavaThreadState". - * \sa hotspot/src/share/vm/utilities/globalDefinitions.hpp - */ -#define THREAD_IN_VM 6 -/*! - * \brief Thread state macro.<br> - * This value means the thread is existing on Java.<br> - * Definition of "enum JavaThreadState". - * \sa hotspot/src/share/vm/utilities/globalDefinitions.hpp - */ -#define THREAD_IN_JAVA 8 - - -/* Class static variables. */ - -/*! - * \brief Singleton instance of TDeadlockFinder. - */ -TDeadlockFinder *TDeadlockFinder::inst = NULL; - - -/*! - * \brief Event handler of JVMTI MonitorContendedEnter for finding deadlock. - * \param jvmti [in] JVMTI environment. - * \param env [in] JNI environment of the event (current) thread. - * \param thread [in] JNI local reference to the thread attempting to enter - * the monitor. - * \param object [in] JNI local reference to the monitor. - * \warning Sometimes this callback is called synchronizing or synchronized - * at safepoint.<br>Please be carefully calling inner function of JVM. - */ -void JNICALL OnMonitorContendedEnterForDeadlock(jvmtiEnv *jvmti, JNIEnv *env, - jthread thread, - jobject object) { - /* Check deadlock. */ - TDeadlockList *list = NULL; - int threadCnt = 0; - char threadName[256] = {0}; - threadCnt = TDeadlockFinder::checkDeadlock(object, &list); - - /* Deadlock is not occurred. */ - if (likely(threadCnt == 0)) { - return; - } - - /* Get thread name. */ - { - jvmtiThreadInfo threadInfo = {0}; - jvmti->GetThreadInfo(thread, &threadInfo); - strncpy(threadName, threadInfo.name, 255); - - /* Cleanup. */ - jvmti->Deallocate((unsigned char *)threadInfo.name); - env->DeleteLocalRef(threadInfo.thread_group); - env->DeleteLocalRef(threadInfo.context_class_loader); - } - - /* Raise alert. */ - logger->printCritMsg( - "ALERT(DEADLOCK): occurred deadlock. threadCount: %d, threadName: \"%s\"", - threadCnt, threadName); - - /* Print deadlock threads. */ - for (TDeadlockList *item = list; item != NULL; item = item->next) { - /* Get thread information. */ - TJavaThreadInfo threadInfo = {0}; - getThreadDetailInfo(jvmti, env, item->thread, &threadInfo); - - logger->printWarnMsg("thread name: %s, prio: %d", threadInfo.name, - threadInfo.priority); - - /* Cleanup. */ - free(threadInfo.name); - free(threadInfo.state); - } - - /* Cleanup deadlock thread list. */ - TDeadlockFinder::freeDeadlockList(list); - - /* Get now date and time. */ - TMSecTime nowTime = (TMSecTime)getNowTimeSec(); - - if (conf->SnmpSend()->get()) { - TDeadlockFinder::inst->sendSNMPTrap(nowTime, threadCnt, threadName); - } - - if (conf->TriggerOnLogLock()->get()) { - try { - /* Invoke log collection. */ - TDeadlockFinder::inst->notify(nowTime); - } catch (...) { - logger->printWarnMsg("Log collection (deadlock) failed."); - } - } else if (unlikely(conf->KillOnError()->get())) { - /* - * Abort JVM process if kill_on_error is enabled. - * If trigger_on_loglock is enabled, this code is skipped because we give - * a chance to collect logs. abort() should be called by logging process. - */ - forcedAbortJVM(jvmti, env, "deadlock occurred"); - } -} - -/* Class methods. */ - -/*! - * \brief Global initialization. - * \return Process result. - * \param event [in] Callback is used on deadlock occurred. - * \warning Please call only once from main thread. - */ -bool TDeadlockFinder::globalInitialize(TDeadlockEventFunc event) { - /* Variable for return code. */ - bool result = true; - - try { - inst = new TDeadlockFinder(event); - } catch (...) { - logger->printCritMsg("Cannot initialize TDeadlockFinder."); - result = false; - } - - return result; -} - -/*! - * \brief Global finalization of deadlock finder. - */ -void TDeadlockFinder::globalFinalize(void) { - delete inst; - inst = NULL; -} - -/*! - * \brief Set JVMTI functional capabilities. - * \param capabilities [out] JVMTI capabilities to add. - * \param isOnLoad [in] OnLoad phase or not (Live phase). - */ -void TDeadlockFinder::setCapabilities(jvmtiCapabilities *capabilities, - bool isOnLoad) { - /* Set capabilities for monitor events. */ - if (conf->CheckDeadlock()->get()) { - capabilities->can_generate_monitor_events = 1; - } - - /* Set capabilities for thread dump which is made by JVMTI function. */ - capabilities->can_get_source_file_name = 1; - capabilities->can_get_line_numbers = 1; - capabilities->can_get_monitor_info = 1; - - /* - * can_get_owned_monitor_stack_depth_info and - * can_get_current_contended_monitor must be set at OnLoad phase. - * - * See also: - * hotspot/src/share/vm/prims/jvmtiManageCapabilities.cpp - */ - if (isOnLoad) { - capabilities->can_get_owned_monitor_stack_depth_info = 1; - capabilities->can_get_current_contended_monitor = 1; - } -} - -/*! -* \brief TDeadlockFinder constructor. -* \param event [in] Callback is used on deadlock occurred. -*/ -TDeadlockFinder::TDeadlockFinder(TDeadlockEventFunc event) - : TAgentThread("HeapStats Deadlock Finder"), occurTime(0) { - /* Sanity check. */ - if (unlikely(event == NULL)) { - throw "Event callback is NULL."; - } - callFunc = event; -} - -/*! - * \brief TDeadlockFinder destructor. - */ -TDeadlockFinder::~TDeadlockFinder(void) { /* none. */ } - -/*! - * \brief Send SNMP trap which contains deadlock information. - * \param nowTime The time of deadlock occurred. - * \param threadCnt Number of threads which are related to deadlock. - * \param name Thread name of deadlock occurred. - */ -void TDeadlockFinder::sendSNMPTrap(TMSecTime nowTime, - int threadCnt, const char *name) { - /* Trap OID. */ - char trapOID[50] = OID_DEADLOCKALERT; - oid OID_ALERT_DATE[] = {SNMP_OID_HEAPALERT, 1}; - oid OID_DEAD_COUNT[] = {SNMP_OID_DEADLOCKALERT, 1}; - oid OID_DEAD_NAME[] = {SNMP_OID_DEADLOCKALERT, 2}; - char buff[256] = {0}; - - try { - /* Send resource trap. */ - TTrapSender sender; - - /* Setting sysUpTime */ - sender.setSysUpTime(); - - /* Setting trapOID. */ - sender.setTrapOID(trapOID); - - /* Set alert date. */ - snprintf(buff, 255, "%llu", nowTime); - sender.addValue(OID_ALERT_DATE, OID_LENGTH(OID_ALERT_DATE), buff, - SNMP_VAR_TYPE_COUNTER64); - - /* Set thread count. */ - snprintf(buff, 255, "%d", threadCnt); - sender.addValue(OID_DEAD_COUNT, OID_LENGTH(OID_DEAD_COUNT), buff, - SNMP_VAR_TYPE_COUNTER32); - - /* Set thread name. */ - sender.addValue(OID_DEAD_NAME, OID_LENGTH(OID_DEAD_NAME), name, - SNMP_VAR_TYPE_STRING); - - /* Send trap. */ - if (unlikely(sender.sendTrap() != SNMP_PROC_SUCCESS)) { - /* Ouput message and clean up. */ - sender.clearValues(); - throw 1; - } - - } catch (...) { - logger->printWarnMsg("Send SNMP deadlock trap failed!"); - } -} - -/*! - * \brief Check deadlock. - * \param monitor [in] Monitor object of thread contended. - * \param list [out] List of deadlock occurred threads. - * \return Number of deadlock occurred threads.<br> - * Value is 0, if deadlock isn't occurred. - */ -int TDeadlockFinder::checkDeadlock(jobject monitor, TDeadlockList **list) { - /* Sanity check. */ - if (unlikely(monitor == NULL || list == NULL)) { - return 0; - } - - TVMFunctions *vmFunc = TVMFunctions::getInstance(); - TVMVariables *vmVal = TVMVariables::getInstance(); - int deadlockCount = 0; - void *thisThreadPtr = vmFunc->GetThread(); - void *thread_lock = *(void **)vmVal->getThreadsLock(); - if (unlikely(thisThreadPtr == NULL || thread_lock == NULL)) { - /* - * Thread class in JVM and thread lock should be set. - * TDeadlockFinder::checkDeadlock() is called by MonitorContendedEnter - * JVMTI event. If this event is fired, current (this) thread must be - * live. - */ - logger->printWarnMsg( - "Deadlock detection failed: Cannot get current thread info."); - return 0; - } - - /* Get self thread id. */ - pid_t threadId = syscall(SYS_gettid); - - int *status = (int *)incAddress(thisThreadPtr, - vmVal->getOfsJavaThreadThreadState()); - int original_status = *status; - - /* - * Normally thread status is "_thread_in_native" - * when thread is running in JVMTI event. - * But thread status maybe changed "_thread_in_vm", - * if call "get_lock_owner" and set true to paramter "doLock". - * If VMThread found this thread has such status - * when call "examine_state_of_thread" at synchronizing safepoint, - * By JVM decided that the thread is waiting VM and callback, - * thread state at safepoint set "_call_back" flag. - * Besides, at end of JVMTI envent callback, - * thread was changed thread status to "_thread_in_native_trans" - * from "_thread_in_vm" - * and JVM check thread about running status at safepoint. - * JVM misunderstand deadlock occurred, so JVM abort by self. - * Why JVM misunderstood. - * 1, Safepoint code wait "_thread_in_native_trans" thread. - * 2, "_call_back" flag means wait VM and callback. - * -> VMThread wait the thread and the thread wait VMThread. - * - * So thread status reset here by force. - */ - *status = THREAD_IN_VM; - - /* Check deadlock. */ - bool foundDeadlock = findDeadLock(threadId, monitor); - - if (unlikely(foundDeadlock)) { - /* Get threads. */ - getLockedThreads(threadId, monitor, list); - - /* Count list item. */ - for (TDeadlockList *item = (*list); item != NULL; item = item->next) { - deadlockCount++; - } - } - - if (*status == THREAD_IN_VM) { - /* - * Reset "_thread_state". - * - * CAUTION!! - * According to the comment of Monitor::lock_without_safepoint_check() in - * hotspot/src/share/vm/runtime/mutex.cpp: - * If this is called with thread state set to be in VM, the safepoint - * synchronization code will deadlock! - */ - *status = original_status; - - bool needLock = !vmFunc->MonitorOwnedBySelf(thread_lock); - - /* - * Lock monitor to avoiding a collision - * with safepoint operation to "ThreadSafepointState". - * E.g. "examine_state_of_thread". - */ - if (likely(needLock)) { - if (isAtSafepoint()) { - vmFunc->MonitorLockWithoutSafepointCheck(thread_lock); - } else { - vmFunc->MonitorLock(thread_lock); - } - } - - /* Reset "_safepoint_state". */ - vmFunc->ThreadSafepointStateDestroy(thisThreadPtr); - vmFunc->ThreadSafepointStateCreate(thisThreadPtr); - - /* Release monitor. */ - if (likely(needLock)) { - vmFunc->MonitorUnlock(thread_lock); - } - } - - return deadlockCount; -} - -/*! - * \brief JThread entry point. - * \param jvmti [in] JVMTI environment object. - * \param jni [in] JNI environment object. - * \param data [in] Pointer of TDeadlockFinder. - */ -void JNICALL - TDeadlockFinder::entryPoint(jvmtiEnv *jvmti, JNIEnv *jni, void *data) { - /* Get self. */ - TDeadlockFinder *controller = (TDeadlockFinder *)data; - /* Change running state. */ - controller->_isRunning = true; - - /* Loop for agent run. */ - while (!controller->_terminateRequest) { - /* Variable for notification flag. */ - bool needProcess = false; - - ENTER_PTHREAD_SECTION(&controller->mutex) { - /* If no exists request. */ - if (likely(controller->_numRequests == 0)) { - /* Wait for notification or termination. */ - pthread_cond_wait(&controller->mutexCond, &controller->mutex); - } - - /* If exists request. */ - if (likely(controller->_numRequests > 0)) { - controller->_numRequests--; - needProcess = true; - - /* Load and pop last deadlock datetime. */ - controller->occurTime = controller->timeList.front(); - controller->timeList.pop(); - } - } - EXIT_PTHREAD_SECTION(&controller->mutex) - - /* If get notification. */ - if (likely(needProcess)) { - /* Call event callback. */ - (*controller->callFunc)(jvmti, jni, OccurredDeadlock); - } - } - - /* Change running state */ - controller->_isRunning = false; -} - -/*! - * \brief Make and begin Jthread. - * \param jvmti [in] JVMTI environment object. - * \param env [in] JNI environment object. - */ -void TDeadlockFinder::start(jvmtiEnv *jvmti, JNIEnv *env) { - /* Call super class's method. */ - TAgentThread::start(jvmti, env, TDeadlockFinder::entryPoint, this, - JVMTI_THREAD_MIN_PRIORITY); -} - -/*! - * \brief Notify occurred deadlock to this thread from other thread. - * \param aTime [in] Time of occurred deadlock. - */ -void TDeadlockFinder::notify(jlong aTime) { - bool raiseException = true; - /* Send notification and count notify. */ - ENTER_PTHREAD_SECTION(&this->mutex) { - try { - /* Store and count data. */ - timeList.push(aTime); - this->_numRequests++; - - /* Notify occurred deadlock. */ - pthread_cond_signal(&this->mutexCond); - - /* Reset exception flag. */ - raiseException = false; - } catch (...) { - /* - * Maybe faield to allocate memory at "std:queue<T>::push()". - * So we throw exception again at after release lock. - */ - } - } - EXIT_PTHREAD_SECTION(&this->mutex) - - if (unlikely(raiseException)) { - throw "Failed to TDeadlockFinder notify"; - } -} - -/*! - * \brief DeadLock search (recursive call). - * \param startId [in] Thread id of TDeadlockFinder caller. - * \param monitor [in] Monitor object of thread contended. - */ -FASTCALL bool TDeadlockFinder::findDeadLock(pid_t startId, jobject monitor) { - TVMFunctions *vmFunc = TVMFunctions::getInstance(); - TVMVariables *vmVal = TVMVariables::getInstance(); - void *threadPtr = NULL; - int *status = NULL; - void *nativeThread = NULL; - pid_t *ownerId = NULL; - void *contendedMonitor = NULL; - jobject monitorOop = NULL; - - /* Get owner thread of this monitor. */ - threadPtr = vmFunc->GetLockOwner(monitor, !isAtSafepoint()); - - /* No deadlock (no owner thread of this monitor). */ - if (unlikely(threadPtr == NULL)) { - return false; - } - - /* Go deadlock check!!! */ - /* Is owner thread is self ? */ - - /* Get OSThread ptr related to JavaThread. */ - nativeThread = - (void *)*(ptrdiff_t *)incAddress(threadPtr, - vmVal->getOfsJavaThreadOsthread()); - - /* If failure get native thread. */ - if (unlikely(nativeThread == NULL)) { - return false; - } - - /* Get nid (LWP ID). */ - ownerId = (pid_t *)incAddress(nativeThread, vmVal->getOfsOSThreadThreadId()); - - /* If occurred deadlock. */ - if (unlikely(*ownerId == startId)) { - /* DeadLock !!! */ - return true; - } - - /* Thread status check. */ - status = (int *)incAddress(threadPtr, vmVal->getOfsJavaThreadThreadState()); - if ((*status == THREAD_IN_JAVA) || (*status == THREAD_IN_VM)) { - /* Owner thread is running. */ - return false; - } - - /* Get ObjectMonitor pointer. */ - contendedMonitor = (void *)*(ptrdiff_t *)incAddress( - threadPtr, vmVal->getOfsThreadCurrentPendingMonitor()); - /* If pointer is illegal. */ - if (unlikely(contendedMonitor == NULL)) { - return false; - } - - monitorOop = (jobject)incAddress(contendedMonitor, - vmVal->getOfsObjectMonitorObject()); - /* If java thread already has monitor. */ - if (unlikely((monitorOop == NULL) || (monitorOop == monitor))) { - return false; - } - - /* No deadlock in "this" thread. */ - - /* Execute recursive call. */ - return findDeadLock(startId, monitorOop); -} - -/*! - * \brief Get threads which has occurred deadlock. - * \param startId [in] Thread id of TDeadlockFinder caller. - * \param monitor [in] Monitor object of thread contended. - * \param list [out] List of deadlock occurred threads. - */ -void TDeadlockFinder::getLockedThreads(pid_t startId, jobject monitor, - TDeadlockList **list) { - TVMFunctions *vmFunc = TVMFunctions::getInstance(); - TVMVariables *vmVal = TVMVariables::getInstance(); - pid_t *ownerId = NULL; - TDeadlockList *listHead = NULL; - TDeadlockList *oldRec = NULL; - bool flagFailure = false; - - /* Infinite loop. */ - while (true) { - void *threadPtr = NULL; - void *nativeThread = NULL; - void *contendedMonitor = NULL; - jthread jThreadObj = NULL; - TDeadlockList *threadRec = NULL; - - /* Get owner thread of this monitor. */ - threadPtr = vmFunc->GetLockOwner(monitor, !isAtSafepoint()); - - if (unlikely(threadPtr == NULL)) { - /* Shouldn't reach to here. */ - logger->printDebugMsg( - "Deadlock detection failed: Cannot get lock owner thread."); - flagFailure = true; - break; - } - - /* Convert to jni object. */ - jThreadObj = (jthread)incAddress(threadPtr, - vmVal->getOfsJavaThreadThreadObj()); - - /* Create list item. */ - threadRec = (TDeadlockList *)malloc(sizeof(TDeadlockList)); - if (unlikely(threadRec == NULL)) { - /* Shouldn't reach to here. */ - logger->printWarnMsg( - "Deadlock detection failed: Cannot allocate memory for " - "TDeadLockList."); - flagFailure = true; - break; - } - - /* Store thread. */ - threadRec->thread = jThreadObj; - threadRec->next = NULL; - if (likely(oldRec != NULL)) { - oldRec->next = threadRec; - } else { - listHead = threadRec; - } - oldRec = threadRec; - - /* Get OSThread ptr related to JavaThread. */ - nativeThread = - (void *)*(ptrdiff_t *)incAddress(threadPtr, - vmVal->getOfsJavaThreadOsthread()); - - if (unlikely(nativeThread == NULL)) { - /* Shouldn't reach to here. */ - logger->printDebugMsg( - "Deadlock detection failed: Cannot get native thread."); - flagFailure = true; - break; - } - - /* Get nid (LWP ID). */ - ownerId = (pid_t *)incAddress(nativeThread, - vmVal->getOfsOSThreadThreadId()); - - /* If all thread already has collected. */ - if (*ownerId == startId) { - break; - } - - /* Get ObjectMonitor pointer. */ - contendedMonitor = (void *)*(ptrdiff_t *)incAddress( - threadPtr, vmVal->getOfsThreadCurrentPendingMonitor()); - - if (unlikely(contendedMonitor == NULL)) { - /* Shouldn't reach to here. */ - logger->printDebugMsg( - "Deadlock detection failed: Cannot get contended monitor."); - flagFailure = true; - break; - } - - monitor = (jobject)incAddress(contendedMonitor, - vmVal->getOfsObjectMonitorObject()); - - /* If illegal state. */ - if (unlikely(monitor == NULL)) { - /* Shouldn't reach to here. */ - logger->printDebugMsg( - "Deadlock detection failed: Cannot get monitor object."); - flagFailure = true; - break; - } - } - - /* If failure get deadlock threads. */ - if (unlikely(flagFailure)) { - freeDeadlockList(listHead); - } else { - (*list) = listHead; - } - - return; -} - -/*! - * \brief Deallocate deadlock thread list. - * \param list [in] List of deadlock occurred threads. - */ -void TDeadlockFinder::freeDeadlockList(TDeadlockList *list) { - /* Sanity check. */ - if (unlikely(list == NULL)) { - return; - } - - /* Cleanup. */ - for (TDeadlockList *next = list->next; next != NULL;) { - TDeadlockList *listItem = next; - next = next->next; - - free(listItem); - } - free(list); -}
--- a/agent/src/heapstats-engines/deadlockFinder.hpp Mon Jul 24 21:16:53 2017 +0900 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,227 +0,0 @@ -/*! - * \file deadlockFinder.hpp - * \brief This file is used by find deadlock. - * Copyright (C) 2011-2016 Nippon Telegraph and Telephone Corporation - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - */ - -#ifndef _DEADLOCK_FINDER_H -#define _DEADLOCK_FINDER_H - -#include <jvmti.h> -#include <jni.h> - -#include <queue> - -#include "util.hpp" -#include "agentThread.hpp" - -/*! - * \brief This macro deginate calling function by using registry. - */ -#ifndef __amd64__ -#define FASTCALL __attribute__((regparm(2))) -#else -#define FASTCALL -#endif - -/*! - * \brief This type is callback to periodic calling by timer. - * \param jvmti [in] JVMTI environment object. - * \param env [in] JNI environment object. - * \param cause [in] Cause of invoke function.<br>Maybe "OccurredDeadlock". - */ -typedef void (*TDeadlockEventFunc)(jvmtiEnv *jvmti, JNIEnv *env, - TInvokeCause cause); - - -/*! - * \brief This type is stored deadlock occurred thread list. - */ -struct TDeadlockList { - jthread thread; - /*!< A thread of deadlock occurred. */ - TDeadlockList *next; - /*!< Next record item. */ -}; - -/*! - * \brief Event handler of JVMTI MonitorContendedEnter for finding deadlock. - * \param jvmti [in] JVMTI environment. - * \param env [in] JNI environment of the event (current) thread. - * \param thread [in] JNI local reference to the thread attempting to enter - * the monitor. - * \param object [in] JNI local reference to the monitor. - * \warning Sometimes this callback is called synchronizing or synchronized - * at safepoint.<br>Please be carefully calling inner function of JVM. - */ -void JNICALL OnMonitorContendedEnterForDeadlock(jvmtiEnv *jvmti, JNIEnv *env, - jthread thread, jobject object); - -/*! - * \brief This class is searching deadlock. - */ -class TDeadlockFinder : public TAgentThread { - public: - /*! - * \brief Global initialization. - * \return Process result. - * \param event [in] Callback is used on deadlock occurred. - * \warning Please call only once from main thread. - */ - static bool globalInitialize(TDeadlockEventFunc event); - - /*! - * \brief Global finalization of deadlock finder. - */ - static void globalFinalize(void); - - /*! - * \brief Set JVMTI functional capabilities. - * \param capabilities [out] JVMTI capabilities to add. - * \param isOnLoad [in] OnLoad phase or not (Live phase). - */ - static void setCapabilities(jvmtiCapabilities *capabilities, bool isOnLoad); - - using TAgentThread::start; - - /*! - * \brief Make and begin Jthread. - * \param jvmti [in] JVMTI environment object. - * \param env [in] JNI environment object. - */ - void start(jvmtiEnv *jvmti, JNIEnv *env); - - using TAgentThread::notify; - - /*! - * \brief Notify occurred deadlock to this thread from other thread. - * \param aTime [in] Time of occurred deadlock. - */ - void notify(jlong aTime); - - /*! - * \brief Send SNMP trap which contains deadlock information. - * \param nowTime The time of deadlock occurred. - * \param threadCnt Number of threads which are related to deadlock. - * \param name Thread name of deadlock occurred. - */ - void sendSNMPTrap(TMSecTime nowTime, int threadCnt, const char *name); - - /*! - * \brief Check deadlock. - * \param monitor [in] Monitor object of thread contended. - * \param list [out] List of deadlock occurred threads. - * \return Number of deadlock occurred threads.<br> - * Value is 0, if deadlock isn't occurred. - */ - static int checkDeadlock(jobject monitor, TDeadlockList **list); - - /*! - * \brief Deallocate deadlock thread list. - * \param list [in] List of deadlock occurred threads. - */ - static void freeDeadlockList(TDeadlockList *list); - - /*! - * \brief Get deadlock time. - * \return Time of finally occurred deadlock until now. - */ - const inline jlong getDeadlockTime(void) { return occurTime; }; - - /*! - * \brief Get singleton instance of TDeadlockFinder. - * \return Singleton instance of TDeadlockFinder. - */ - static TDeadlockFinder *getInstance() { return inst; }; - - protected: - /*! - * \brief TDeadlockFinder constructor. - * \param event [in] Callback is used on deadlock occurred. - */ - TDeadlockFinder(TDeadlockEventFunc event); - - /*! - * \brief TDeadlockFinder destructor. - */ - virtual ~TDeadlockFinder(void); - - /*! - * \brief Event handler of JVMTI MonitorContendedEnter for finding - * deadlock. - * \param jvmti [in] JVMTI environment. - * \param env [in] JNI environment of the event (current) thread. - * \param thread [in] JNI local reference to the thread attempting - * to enter the monitor. - * \param object [in] JNI local reference to the monitor. - * \warning Sometimes this callback is called synchronizing or - * synchronized at safepoint.<br>Please be carefully calling - * inner function of JVM. - */ - friend void JNICALL - OnMonitorContendedEnterForDeadlock(jvmtiEnv *jvmti, JNIEnv *env, - jthread thread, jobject object); - - /*! - * \brief JThread entry point. - * \param jvmti [in] JVMTI environment object. - * \param jni [in] JNI environment object. - * \param data [in] Pointer of TDeadlockFinder. - */ - static void JNICALL entryPoint(jvmtiEnv *jvmti, JNIEnv *jni, void *data); - - /*! - * \brief DeadLock search (recursive call). - * \param startId [in] Thread id of TDeadlockFinder caller. - * \param monitor [in] Monitor object of thread contended. - * \return Is found deadlock. - */ - static FASTCALL bool findDeadLock(pid_t startId, jobject monitor); - - /*! - * \brief Get threads which has occurred deadlock. - * \param startId [in] Thread id of TDeadlockFinder caller. - * \param monitor [in] Monitor object of thread contended. - * \param list [out] List of deadlock occurred threads. - */ - static void getLockedThreads(pid_t startId, jobject monitor, - TDeadlockList **list); - - private: - /*! - * \brief Singleton instance of TDeadlockFinder. - */ - static TDeadlockFinder *inst; - - /*! - * \brief Callback for event on deadlock occurred. - */ - TDeadlockEventFunc callFunc; - - /*! - * \brief Time of finally occurred deadlock until now. - */ - volatile jlong occurTime; - - /*! - * \brief Queue of occurred deadlock datetime. - */ - std::queue<jlong> timeList; -}; - -#endif // _DEADLOCK_FINDER_H
--- a/agent/src/heapstats-engines/globals.hpp Mon Jul 24 21:16:53 2017 +0900 +++ b/agent/src/heapstats-engines/globals.hpp Wed Aug 02 14:46:00 2017 +0900 @@ -43,9 +43,6 @@ extern TTimer *logTimer; extern TTimer *timer; -#include "deadlockFinder.hpp" -extern TDeadlockFinder *lockFinder; - #include "symbolFinder.hpp" extern TSymbolFinder *symFinder;
--- a/agent/src/heapstats-engines/libmain.cpp Mon Jul 24 21:16:53 2017 +0900 +++ b/agent/src/heapstats-engines/libmain.cpp Wed Aug 02 14:46:00 2017 +0900 @@ -30,7 +30,7 @@ #include "elapsedTimer.hpp" #include "snapShotMain.hpp" #include "logMain.hpp" -#include "deadlockFinder.hpp" +#include "deadlockDetector.hpp" #include "callbackRegister.hpp" #include "threadRecorder.hpp" #include "heapstatsMBean.hpp" @@ -162,6 +162,11 @@ /* Suspend threads. */ SetThreadEnable(jvmti, env, false); + /* Suspend deadlock detector. */ + if (conf->CheckDeadlock()->get()) { + dldetector::finalize(jvmti); + } + /* Suspend thread status logging. */ if (conf->ThreadRecordEnable()->get()) { TThreadRecorder::finalize(jvmti, env, @@ -198,7 +203,17 @@ /* Restart threads. */ SetThreadEnable(jvmti, env, true); - /* Suspend thread status logging. */ + /* Start deadlock detector. */ + if (conf->CheckDeadlock()->get()) { + jvmtiCapabilities capabilities = {0}; + dldetector::initialize(jvmti, false); + if (isError(jvmti, jvmti->AddCapabilities(&capabilities))) { + logger->printCritMsg( + "Couldn't set event capabilities for deadlock detector."); + } + } + + /* Start thread status logging. */ if (conf->ThreadRecordEnable()->get()) { TThreadRecorder::initialize( jvmti, env, conf->ThreadRecordBufferSize()->get() * 1024 * 1024); @@ -386,6 +401,10 @@ /* Stop and disable each thread. */ SetThreadEnable(jvmti, env, false); + if (conf->CheckDeadlock()->get()) { + dldetector::finalize(jvmti); + } + if (conf->ThreadRecordEnable()->get()) { TThreadRecorder::finalize(jvmti, env, conf->ThreadRecordFileName()->get()); @@ -431,9 +450,6 @@ /* Set capability for object tagging. */ capabilities.can_tag_objects = 1; - /* Set capabilities for Deadlock detector. */ - TDeadlockFinder::setCapabilities(&capabilities, isOnLoad); - /* Set capabilities for Thread Recording. */ TThreadRecorder::setCapabilities(&capabilities); @@ -478,9 +494,9 @@ /* Setup MonitorContendedEnter event. */ if (conf->CheckDeadlock()->get()) { - TMonitorContendedEnterCallback::mergeCapabilities(&capabilities); - TMonitorContendedEnterCallback::registerCallback( - &OnMonitorContendedEnterForDeadlock); + if (!dldetector::initialize(jvmti, isOnLoad)) { + return DLDETECTOR_SETUP_FAILED; + } } /* Setup VMInit event. */
--- a/agent/src/heapstats-engines/logMain.cpp Mon Jul 24 21:16:53 2017 +0900 +++ b/agent/src/heapstats-engines/logMain.cpp Wed Aug 02 14:46:00 2017 +0900 @@ -71,11 +71,6 @@ volatile sig_atomic_t flagAllLogSignal; /*! - * \brief Flag of abortion by deadlock occurred. - */ -bool abortionByDeadlock = false; - -/*! * \brief processing flag */ static std::atomic_int processing(0); @@ -171,32 +166,6 @@ } /*! - * \brief Callback for deadlock trap and log. - * \param jvmti [in] JVMTI environment object. - * \param env [in] JNI environment object. - * \param cause [in] Cause of taking a snapshot.<br> - * This value is always OccurredDeadlock. - */ -void onOccurredDeadLock(jvmtiEnv *jvmti, JNIEnv *env, TInvokeCause cause) { - TProcessMark mark(processing); - - /* Get now date and time. */ - TMSecTime occurTime = TDeadlockFinder::getInstance()->getDeadlockTime(); - - /* Collect log. */ - if (unlikely(!TakeLogInfo(jvmti, env, cause, occurTime, ""))) { - logger->printWarnMsg("Failure collect log on occurred deadlock."); - } - - /* If enable to abort JVM by force on occurred deadlock. */ - if (unlikely(conf->KillOnError()->get())) { - /* Set flag for avoid to deadlock which wait self thread termination. */ - abortionByDeadlock = true; - forcedAbortJVM(jvmti, env, "deadlock occurred"); - } -} - -/*! * \brief JVM resource exhausted event. * \param jvmti [in] JVMTI environment object. * \param env [in] JNI environment object. @@ -304,12 +273,6 @@ TResourceExhaustedCallback::switchEventNotification(jvmti, mode); } - /* If collect log when occurred deadlock. */ - if (conf->CheckDeadlock()->get()) { - /* Enable monitor contended event. */ - TMonitorContendedEnterCallback::switchEventNotification(jvmti, mode); - } - return SUCCESS; } @@ -334,15 +297,6 @@ /* Reset signal flag even if non-processed signal is exist. */ flagLogSignal = 0; flagAllLogSignal = 0; - - if (conf->CheckDeadlock()->get() && !abortionByDeadlock) { - /* Switch deadlock finder state. */ - if (enable) { - TDeadlockFinder::getInstance()->start(jvmti, env); - } else { - TDeadlockFinder::getInstance()->stop(); - } - } } catch (const char *errMsg) { logger->printWarnMsg(errMsg); } @@ -446,14 +400,6 @@ jint onAgentInitForLog(void) { /* Create thread instances that controlled log trigger. */ try { - if (conf->CheckDeadlock()->get()) { - if (unlikely(!TDeadlockFinder::globalInitialize(&onOccurredDeadLock))) { - logger->printWarnMsg("Failed to initialize deadlock finder."); - conf->CheckDeadlock()->set(false); - conf->TriggerOnLogLock()->set(false); - } - } - logTimer = new TTimer(&intervalLogProc, "HeapStats Log Timer"); } catch (const char *errMsg) { logger->printCritMsg(errMsg); @@ -481,11 +427,6 @@ delete logTimer; logTimer = NULL; - /* Destroy deadlock finder object. */ - if (conf->CheckDeadlock()->get()) { - TDeadlockFinder::globalFinalize(); - } - /* Destroy log manager. */ delete logManager; logManager = NULL;
--- a/agent/src/heapstats-engines/util.hpp Mon Jul 24 21:16:53 2017 +0900 +++ b/agent/src/heapstats-engines/util.hpp Wed Aug 02 14:46:00 2017 +0900 @@ -166,6 +166,10 @@ * \brief SNMP setup failed. */ #define SNMP_SETUP_FAILED 0x08 +/*! + * \brief Deadlock detector setup failed. + */ +#define DLDETECTOR_SETUP_FAILED 0x09 /*! * \brief This macro is notification catch signal to signal watcher thread.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/deadlock/NoDeadLock.java Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,36 @@ + +public class NoDeadLock implements Runnable{ + + private Object lock; + + public NoDeadLock(Object lock){ + this.lock = lock; + } + + public void run(){ + + synchronized(lock){ + + try{ + Thread.sleep(3000); + } + catch(Exception e){ + e.printStackTrace(); + } + + System.out.println("lock succeeded."); + } + + } + + public static void main(String[] args) throws Exception{ + int locks = Integer.parseInt(args[0]); + + for(int idx = 0; idx < locks; idx++){ + (new Thread(new NoDeadLock(NoDeadLock.class))).start(); + } + + } + +} +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEnter/buildenv.sh Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,27 @@ +<< LICENSE +Copyright (C) 2017 Yasumasa Suenaga + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +LICENSE + +#!/bin/sh + +export CLASSPATH=testcase +export MAINCLASS=Test +unset JAVA_OPTS +export HEAPSTATS_CONF=heapstats-deadlock.conf + +$JAVA_HOME/bin/javac $TEST_TARGET/testcase/Test.java +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEnter/heapstats-deadlock.conf Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,68 @@ +# heapstats_agent 2.0.0 +# heapstats_agent 2.0.0 configuration file. +attach=true + +# Output file setting +file=heapstats_snapshot.dat +heaplogfile=heapstats_log.csv +archivefile=heapstats_analyze.zip +logfile= +loglevel=INFO +reduce_snapshot=true + +# SnapShot type +collect_reftree=true + +# Trigger snapshot setting +trigger_on_fullgc=true +trigger_on_dump=true + +# deadlock check +check_deadlock=true + +# Trigger logging setting +trigger_on_logerror=true +trigger_on_logsignal=true +trigger_on_loglock=true + +# Rank setting +rank_level=5 +rank_order=delta + +# Alert setting +alert_percentage=50 + +# Alert threshold for java heap usage. +# "0" means disabled. +javaheap_alert_percentage=95 + +# Alert threshold for metaspace usage (in MB). +# "0" means disabled. +metaspace_alert_threshold=0 + +# Timer setting +snapshot_interval=0 +log_interval=300 + +first_collect=true +logsignal_normal= +logsignal_all=SIGUSR2 +signal_reload=SIGHUP + +# Thread recording +thread_record_enable=false +thread_record_buffer_size=100 # Set buffer size in MB. +thread_record_filename=heapstats-thread-records.htr +thread_record_iotracer=/usr/local/etc/iotracer/IoTrace.class + +# Snmp setting +snmp_send=true +snmp_target=localhost +snmp_comname=public +# You can check library path with `net-snmp-config --netsnmp-libs` +snmp_libpath=/usr/lib64/libnetsnmp.so + +logdir=./tmp +archive_command=/usr/bin/zip %archivefile% -jr %logdir% + +kill_on_error=false
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEnter/test.py Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,25 @@ +''' +Copyright (C) 2017 Yasumasa Suenaga + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +''' + +import sys, os +sys.path.append(os.pardir + "/../") + +import common + + +common.initialize("dldetector::OnMonitorContendedEnter", common.return_true, "dldetector::OnMonitorContendedEnter", common.return_true, False)
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEnter/testcase/Test.java Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2017 Yasumasa Suenaga + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + + +public class Test implements Runnable{ + + private final Object lock1; + private final Object lock2; + + public Test(Object lock1, Object lock2){ + this.lock1 = lock1; + this.lock2 = lock2; + } + + public void run(){ + try{ + synchronized(lock1){ + Thread.sleep(3000); + synchronized(lock2){ + System.out.println("Test error"); + System.exit(-1); + } + } + } + catch(Exception e){ + e.printStackTrace(); + } + } + + public static void main(String[] args) throws Exception{ + Object lock1 = new Object(); + Object lock2 = new Object(); + + Thread th1 = new Thread(new Test(lock1, lock2)); + Thread th2 = new Thread(new Test(lock2, lock1)); + th1.setDaemon(true); + th2.setDaemon(true); + th1.start(); + th2.start(); + + Thread.sleep(7000); + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEnter_safepoint/buildenv.sh Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,1 @@ +../MonitorContendedEnter/buildenv.sh \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEnter_safepoint/heapstats-deadlock.conf Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,1 @@ +../MonitorContendedEnter/heapstats-deadlock.conf \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEnter_safepoint/test.py Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,25 @@ +''' +Copyright (C) 2017 Yasumasa Suenaga + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +''' + +import sys, os +sys.path.append(os.pardir + "/../") + +import common + + +common.initialize("dldetector::OnMonitorContendedEnter", common.return_true, "dldetector::OnMonitorContendedEnter", common.return_true, False, at_safepoint=True)
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEnter_safepoint/testcase Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,1 @@ +../MonitorContendedEnter/testcase \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEntered/buildenv.sh Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,27 @@ +<< LICENSE +Copyright (C) 2017 Yasumasa Suenaga + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +LICENSE + +#!/bin/sh + +export CLASSPATH=testcase +export MAINCLASS=Test +unset JAVA_OPTS +export HEAPSTATS_CONF=heapstats-deadlock.conf + +$JAVA_HOME/bin/javac $TEST_TARGET/testcase/Test.java +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEntered/heapstats-deadlock.conf Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,68 @@ +# heapstats_agent 2.0.0 +# heapstats_agent 2.0.0 configuration file. +attach=true + +# Output file setting +file=heapstats_snapshot.dat +heaplogfile=heapstats_log.csv +archivefile=heapstats_analyze.zip +logfile= +loglevel=INFO +reduce_snapshot=true + +# SnapShot type +collect_reftree=true + +# Trigger snapshot setting +trigger_on_fullgc=true +trigger_on_dump=true + +# deadlock check +check_deadlock=true + +# Trigger logging setting +trigger_on_logerror=true +trigger_on_logsignal=true +trigger_on_loglock=true + +# Rank setting +rank_level=5 +rank_order=delta + +# Alert setting +alert_percentage=50 + +# Alert threshold for java heap usage. +# "0" means disabled. +javaheap_alert_percentage=95 + +# Alert threshold for metaspace usage (in MB). +# "0" means disabled. +metaspace_alert_threshold=0 + +# Timer setting +snapshot_interval=0 +log_interval=300 + +first_collect=true +logsignal_normal= +logsignal_all=SIGUSR2 +signal_reload=SIGHUP + +# Thread recording +thread_record_enable=false +thread_record_buffer_size=100 # Set buffer size in MB. +thread_record_filename=heapstats-thread-records.htr +thread_record_iotracer=/usr/local/etc/iotracer/IoTrace.class + +# Snmp setting +snmp_send=true +snmp_target=localhost +snmp_comname=public +# You can check library path with `net-snmp-config --netsnmp-libs` +snmp_libpath=/usr/lib64/libnetsnmp.so + +logdir=./tmp +archive_command=/usr/bin/zip %archivefile% -jr %logdir% + +kill_on_error=false
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEntered/test.py Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,25 @@ +''' +Copyright (C) 2017 Yasumasa Suenaga + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +''' + +import sys, os +sys.path.append(os.pardir + "/../") + +import common + + +common.initialize("dldetector::OnMonitorContendedEnter", common.return_true, "dldetector::OnMonitorContendedEntered", common.return_true, True)
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEntered/testcase/Test.java Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,60 @@ +/* + * Copyright (C) 2017 Yasumasa Suenaga + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + + +public class Test implements Runnable{ + + private final Object lock; + + public Test(Object lock){ + this.lock = lock; + } + + public void run(){ + try{ + synchronized(lock){ + Thread.sleep(3000); + } + } + catch(Exception e){ + e.printStackTrace(); + } + } + + public static void main(String[] args) throws Exception{ + Object lock1 = new Object(); + Object lock2 = new Object(); + + Thread th1 = new Thread(new Test(lock1)); + Thread th2 = new Thread(new Test(lock1)); + th1.start(); + th2.start(); + + Thread th3 = new Thread(new Test(lock2)); + Thread th4 = new Thread(new Test(lock2)); + + th3.start(); + th4.start(); + + th1.join(); + th2.join(); + th3.join(); + th4.join(); + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEntered_safepoint/buildenv.sh Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,1 @@ +../MonitorContendedEntered/buildenv.sh \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEntered_safepoint/heapstats-deadlock.conf Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,1 @@ +../MonitorContendedEntered/heapstats-deadlock.conf \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEntered_safepoint/test.py Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,25 @@ +''' +Copyright (C) 2017 Yasumasa Suenaga + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +''' + +import sys, os +sys.path.append(os.pardir + "/../") + +import common + + +common.initialize("dldetector::OnMonitorContendedEnter", common.return_true, "dldetector::OnMonitorContendedEntered", common.return_true, True, at_safepoint=True)
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEnter/MonitorContendedEntered_safepoint/testcase Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,1 @@ +../MonitorContendedEntered/testcase \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEnter/buildenv.sh Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,27 @@ +<< LICENSE +Copyright (C) 2017 Yasumasa Suenaga + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +LICENSE + +#!/bin/sh + +export CLASSPATH=testcase +export MAINCLASS=Test +unset JAVA_OPTS +export HEAPSTATS_CONF=heapstats-deadlock.conf + +$JAVA_HOME/bin/javac $TEST_TARGET/testcase/Test.java +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEnter/heapstats-deadlock.conf Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,68 @@ +# heapstats_agent 2.0.0 +# heapstats_agent 2.0.0 configuration file. +attach=true + +# Output file setting +file=heapstats_snapshot.dat +heaplogfile=heapstats_log.csv +archivefile=heapstats_analyze.zip +logfile= +loglevel=INFO +reduce_snapshot=true + +# SnapShot type +collect_reftree=true + +# Trigger snapshot setting +trigger_on_fullgc=true +trigger_on_dump=true + +# deadlock check +check_deadlock=true + +# Trigger logging setting +trigger_on_logerror=true +trigger_on_logsignal=true +trigger_on_loglock=true + +# Rank setting +rank_level=5 +rank_order=delta + +# Alert setting +alert_percentage=50 + +# Alert threshold for java heap usage. +# "0" means disabled. +javaheap_alert_percentage=95 + +# Alert threshold for metaspace usage (in MB). +# "0" means disabled. +metaspace_alert_threshold=0 + +# Timer setting +snapshot_interval=0 +log_interval=300 + +first_collect=true +logsignal_normal= +logsignal_all=SIGUSR2 +signal_reload=SIGHUP + +# Thread recording +thread_record_enable=false +thread_record_buffer_size=100 # Set buffer size in MB. +thread_record_filename=heapstats-thread-records.htr +thread_record_iotracer=/usr/local/etc/iotracer/IoTrace.class + +# Snmp setting +snmp_send=true +snmp_target=localhost +snmp_comname=public +# You can check library path with `net-snmp-config --netsnmp-libs` +snmp_libpath=/usr/lib64/libnetsnmp.so + +logdir=./tmp +archive_command=/usr/bin/zip %archivefile% -jr %logdir% + +kill_on_error=false
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEnter/test.py Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,25 @@ +''' +Copyright (C) 2017 Yasumasa Suenaga + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +''' + +import sys, os +sys.path.append(os.pardir + "/../") + +import common + + +common.initialize("dldetector::OnMonitorContendedEntered", common.return_true, "dldetector::OnMonitorContendedEnter", common.return_true, True)
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEnter/testcase/Test.java Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,60 @@ +/* + * Copyright (C) 2017 Yasumasa Suenaga + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + + +public class Test implements Runnable{ + + private final Object lock; + + public Test(Object lock){ + this.lock = lock; + } + + public void run(){ + try{ + synchronized(lock){ + Thread.sleep(3000); + } + } + catch(Exception e){ + e.printStackTrace(); + } + } + + public static void main(String[] args) throws Exception{ + Object lock1 = new Object(); + Object lock2 = new Object(); + + Thread th1 = new Thread(new Test(lock1)); + Thread th2 = new Thread(new Test(lock1)); + th1.start(); + th2.start(); + + Thread th3 = new Thread(new Test(lock2)); + Thread th4 = new Thread(new Test(lock2)); + + th3.start(); + th4.start(); + + th1.join(); + th2.join(); + th3.join(); + th4.join(); + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEnter_safepoint/buildenv.sh Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,1 @@ +../MonitorContendedEnter/buildenv.sh \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEnter_safepoint/heapstats-deadlock.conf Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,1 @@ +../MonitorContendedEnter/heapstats-deadlock.conf \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEnter_safepoint/test.py Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,25 @@ +''' +Copyright (C) 2017 Yasumasa Suenaga + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +''' + +import sys, os +sys.path.append(os.pardir + "/../") + +import common + + +common.initialize("dldetector::OnMonitorContendedEntered", common.return_true, "dldetector::OnMonitorContendedEnter", common.return_true, True, at_safepoint=True)
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEnter_safepoint/testcase Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,1 @@ +../MonitorContendedEnter/testcase \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEntered/buildenv.sh Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,27 @@ +<< LICENSE +Copyright (C) 2017 Yasumasa Suenaga + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +LICENSE + +#!/bin/sh + +export CLASSPATH=testcase +export MAINCLASS=Test +unset JAVA_OPTS +export HEAPSTATS_CONF=heapstats-deadlock.conf + +$JAVA_HOME/bin/javac $TEST_TARGET/testcase/Test.java +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEntered/heapstats-deadlock.conf Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,68 @@ +# heapstats_agent 2.0.0 +# heapstats_agent 2.0.0 configuration file. +attach=true + +# Output file setting +file=heapstats_snapshot.dat +heaplogfile=heapstats_log.csv +archivefile=heapstats_analyze.zip +logfile= +loglevel=INFO +reduce_snapshot=true + +# SnapShot type +collect_reftree=true + +# Trigger snapshot setting +trigger_on_fullgc=true +trigger_on_dump=true + +# deadlock check +check_deadlock=true + +# Trigger logging setting +trigger_on_logerror=true +trigger_on_logsignal=true +trigger_on_loglock=true + +# Rank setting +rank_level=5 +rank_order=delta + +# Alert setting +alert_percentage=50 + +# Alert threshold for java heap usage. +# "0" means disabled. +javaheap_alert_percentage=95 + +# Alert threshold for metaspace usage (in MB). +# "0" means disabled. +metaspace_alert_threshold=0 + +# Timer setting +snapshot_interval=0 +log_interval=300 + +first_collect=true +logsignal_normal= +logsignal_all=SIGUSR2 +signal_reload=SIGHUP + +# Thread recording +thread_record_enable=false +thread_record_buffer_size=100 # Set buffer size in MB. +thread_record_filename=heapstats-thread-records.htr +thread_record_iotracer=/usr/local/etc/iotracer/IoTrace.class + +# Snmp setting +snmp_send=true +snmp_target=localhost +snmp_comname=public +# You can check library path with `net-snmp-config --netsnmp-libs` +snmp_libpath=/usr/lib64/libnetsnmp.so + +logdir=./tmp +archive_command=/usr/bin/zip %archivefile% -jr %logdir% + +kill_on_error=false
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEntered/test.py Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,25 @@ +''' +Copyright (C) 2017 Yasumasa Suenaga + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +''' + +import sys, os +sys.path.append(os.pardir + "/../") + +import common + + +common.initialize("dldetector::OnMonitorContendedEntered", common.return_true, "dldetector::OnMonitorContendedEntered", common.return_true, False)
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEntered/testcase/Test.java Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,60 @@ +/* + * Copyright (C) 2017 Yasumasa Suenaga + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + + +public class Test implements Runnable{ + + private final Object lock; + + public Test(Object lock){ + this.lock = lock; + } + + public void run(){ + try{ + synchronized(lock){ + Thread.sleep(3000); + } + } + catch(Exception e){ + e.printStackTrace(); + } + } + + public static void main(String[] args) throws Exception{ + Object lock1 = new Object(); + Object lock2 = new Object(); + + Thread th1 = new Thread(new Test(lock1)); + Thread th2 = new Thread(new Test(lock1)); + th1.start(); + th2.start(); + + Thread th3 = new Thread(new Test(lock2)); + Thread th4 = new Thread(new Test(lock2)); + + th3.start(); + th4.start(); + + th1.join(); + th2.join(); + th3.join(); + th4.join(); + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEntered_safepoint/buildenv.sh Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,1 @@ +../MonitorContendedEntered/buildenv.sh \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEntered_safepoint/heapstats-deadlock.conf Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,1 @@ +../MonitorContendedEntered/heapstats-deadlock.conf \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/test/race-condition/MonitorContendedEntered/MonitorContendedEntered_safepoint/test.py Wed Aug 02 14:46:00 2017 +0900 @@ -0,0 +1,25 @@ +''' +Copyright (C) 2017 Yasumasa Suenaga + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +''' + +import sys, os +sys.path.append(os.pardir + "/../") + +import common + + +common.initialize("dldetector::OnMonitorContendedEntered", common.return_true, "dldetector::OnMonitorContendedEntered", common.return_true, False, at_safepoint=True)