| /* |
| * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <jni.h> |
| #include <jvmti.h> |
| #include <aod.h> |
| #include <jvmti_aod.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* |
| * Expected agent work scenario: |
| * - from Agent_OnAttach function start auxiliary thread waiting on 'gcFinishMonitor' |
| * - receive GarbageCollectionStart event |
| * - receive GarbageCollectionFinish event, notify 'gcFinishMonitor' |
| * - notified auxiliary thread calls function 'nsk_aod_agentFinished' and agent completes work |
| * (such schema is used because of agent can't call nsk_aod_agentFinished from GarbageCollectionFinish handler, |
| * nsk_aod_agentFinished calls JNI functions and it is prohibited in GarbageCollectionFinish handler) |
| * |
| */ |
| |
| static Options* options = NULL; |
| static const char* agentName; |
| |
| static jvmtiEvent testEvents[] = {JVMTI_EVENT_GARBAGE_COLLECTION_START, JVMTI_EVENT_GARBAGE_COLLECTION_FINISH}; |
| static const int testEventsNumber = 2; |
| |
| static jrawMonitorID gcFinishMonitor; |
| |
| static volatile int gcStartEventReceived = 0; |
| |
| static volatile int gcFinishEventReceived = 0; |
| |
| static volatile int success = 1; |
| |
| void JNICALL garbageCollectionStartHandler(jvmtiEnv *jvmti) { |
| NSK_DISPLAY1("%s: GC start event received\n", agentName); |
| |
| gcStartEventReceived = 1; |
| } |
| |
| void JNICALL garbageCollectionFinishHandler(jvmtiEnv *jvmti) { |
| int auxiliaryThreadNotified = 0; |
| |
| NSK_DISPLAY1("%s: GC finish event received\n", agentName); |
| |
| if (!gcStartEventReceived) { |
| NSK_COMPLAIN1("%s: GC start event wasn't received before GC finish event\n", agentName); |
| success = 0; |
| } |
| |
| if (NSK_JVMTI_VERIFY(NSK_CPP_STUB2( |
| RawMonitorEnter, jvmti, gcFinishMonitor))) { |
| |
| gcFinishEventReceived = 1; |
| |
| if (NSK_JVMTI_VERIFY(NSK_CPP_STUB2( |
| RawMonitorNotify, jvmti, gcFinishMonitor))) { |
| auxiliaryThreadNotified = 1; |
| } |
| |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorExit, jvmti, gcFinishMonitor))) { |
| success = 0; |
| } |
| } else { |
| success = 0; |
| } |
| |
| if (!auxiliaryThreadNotified) { |
| NSK_COMPLAIN1("%s: Error happenned during auxiliary thread notification, test may hang\n", agentName); |
| } |
| } |
| |
| void JNICALL auxiliaryThreadFunction(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) { |
| NSK_DISPLAY1("%s: auxiliary thread is running\n", agentName); |
| |
| if (NSK_JVMTI_VERIFY(NSK_CPP_STUB2( |
| RawMonitorEnter, jvmti, gcFinishMonitor))) { |
| |
| if (!gcFinishEventReceived) { |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3( |
| RawMonitorWait, jvmti, gcFinishMonitor, 0))) { |
| success = 0; |
| } |
| } |
| |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorExit, jvmti, gcFinishMonitor))) { |
| success = 0; |
| } |
| } else { |
| success = 0; |
| } |
| |
| nsk_jvmti_aod_disableEventsAndFinish(agentName, testEvents, testEventsNumber, success, jvmti, jni); |
| } |
| |
| int startAuxiliaryThread(jvmtiEnv* jvmti, JNIEnv* jni) { |
| jthread thread; |
| |
| if (!NSK_VERIFY((thread = nsk_jvmti_aod_createThread(jni)) != NULL)) |
| return NSK_FALSE; |
| |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB5( |
| RunAgentThread, jvmti, thread, auxiliaryThreadFunction, NULL, JVMTI_THREAD_NORM_PRIORITY ))) { |
| return NSK_FALSE; |
| } |
| |
| NSK_DISPLAY1("%s: auxiliary thread was started\n", agentName); |
| |
| return NSK_TRUE; |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNI_OnLoad_attach020Agent00(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| |
| JNIEXPORT jint JNICALL |
| #ifdef STATIC_BUILD |
| Agent_OnAttach_attach020Agent00(JavaVM *vm, char *optionsString, void *reserved) |
| #else |
| Agent_OnAttach(JavaVM *vm, char *optionsString, void *reserved) |
| #endif |
| { |
| jvmtiEnv* jvmti; |
| jvmtiEventCallbacks eventCallbacks; |
| jvmtiCapabilities caps; |
| JNIEnv* jni; |
| |
| if (!NSK_VERIFY((options = (Options*) nsk_aod_createOptions(optionsString)) != NULL)) |
| return JNI_ERR; |
| |
| agentName = nsk_aod_getOptionValue(options, NSK_AOD_AGENT_NAME_OPTION); |
| |
| if ((jni = (JNIEnv*) nsk_aod_createJNIEnv(vm)) == NULL) |
| return JNI_ERR; |
| |
| if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(vm, reserved)) != NULL)) |
| return JNI_ERR; |
| |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(CreateRawMonitor, jvmti, "GCFinishMonitor", &gcFinishMonitor))) { |
| return JNI_ERR; |
| } |
| |
| if (!NSK_VERIFY(startAuxiliaryThread(jvmti, jni))) |
| return JNI_ERR; |
| |
| memset(&caps, 0, sizeof(caps)); |
| caps.can_generate_garbage_collection_events = 1; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities, jvmti, &caps)) ) { |
| return JNI_ERR; |
| } |
| |
| memset(&eventCallbacks,0, sizeof(eventCallbacks)); |
| eventCallbacks.GarbageCollectionStart = garbageCollectionStartHandler; |
| eventCallbacks.GarbageCollectionFinish = garbageCollectionFinishHandler; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetEventCallbacks, jvmti, &eventCallbacks, sizeof(eventCallbacks))) ) { |
| return JNI_ERR; |
| } |
| |
| if (!(nsk_jvmti_aod_enableEvents(jvmti, testEvents, testEventsNumber))) { |
| return JNI_ERR; |
| } |
| |
| NSK_DISPLAY1("%s: initialization was done\n", agentName); |
| |
| if (!NSK_VERIFY(nsk_aod_agentLoaded(jni, agentName))) |
| return JNI_ERR; |
| |
| return JNI_OK; |
| } |
| #ifdef __cplusplus |
| } |
| #endif |