1 /* 2 * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 #include <jni.h> 27 #include <jvmti.h> 28 #include <aod.h> 29 #include <jvmti_aod.h> 30 31 extern "C" { 32 33 /* 34 * Expected agent work scenario: 35 * - receive MonitorContentedEnter event for thread ThreadGeneratingEvents 36 * - receive MonitorContentedEntered event for thread ThreadGeneratingEvents and finish work 37 */ 38 39 #define THREAD_GENERATING_EVENTS_NAME "ThreadGeneratingEvents" 40 41 static Options* options = NULL; 42 static const char* agentName; 43 44 static jvmtiEvent testEvents[] = {JVMTI_EVENT_MONITOR_CONTENDED_ENTER, JVMTI_EVENT_MONITOR_CONTENDED_ENTERED}; 45 static const int testEventsNumber = 2; 46 47 static volatile int monitorEnter = 0; 48 49 static int success = 1; 50 51 void JNICALL monitorContentedEnterHandler(jvmtiEnv * jvmti, 52 JNIEnv * jni, 53 jthread thread, 54 jobject object) { 55 char threadName[MAX_STRING_LENGTH]; 56 57 if (!nsk_jvmti_aod_getThreadName(jvmti, thread, threadName)) { 58 nsk_jvmti_aod_disableEventsAndFinish(agentName, testEvents, testEventsNumber, 0, jvmti, jni); 59 return; 60 } 61 62 NSK_DISPLAY2("%s: MonitorContentedEnter event received for thread '%s'\n", agentName, threadName); 63 64 if (!strcmp(threadName, THREAD_GENERATING_EVENTS_NAME)) { 65 monitorEnter = 1; 66 } 67 } 68 69 void JNICALL monitorContentedEnteredHandler( 70 jvmtiEnv * jvmti, 71 JNIEnv * jni, 72 jthread thread, 73 jobject object) { 74 char threadName[MAX_STRING_LENGTH]; 75 76 if(!nsk_jvmti_aod_getThreadName(jvmti, thread, threadName)) { 77 nsk_jvmti_aod_disableEventsAndFinish(agentName, testEvents, testEventsNumber, 0, jvmti, jni); 78 return; 79 } 80 81 NSK_DISPLAY2("%s: MonitorContentedEntered event received for thread '%s'\n", agentName, threadName); 82 83 if (!strcmp(threadName, THREAD_GENERATING_EVENTS_NAME)) { 84 int success = 1; 85 86 if (!monitorEnter) { 87 success = 0; 88 NSK_COMPLAIN2("%s: MonitorContentedEnter event wasn't received for thread %s\n", agentName, threadName); 89 } 90 91 nsk_jvmti_aod_disableEventsAndFinish(agentName, testEvents, testEventsNumber, success, jvmti, jni); 92 } 93 } 94 95 #ifdef STATIC_BUILD 96 JNIEXPORT jint JNI_OnLoad_attach008Agent00(JavaVM *jvm, char *options, void *reserved) { 97 return JNI_VERSION_1_8; 98 } 99 #endif 100 101 JNIEXPORT jint JNICALL 102 #ifdef STATIC_BUILD 103 Agent_OnAttach_attach008Agent00(JavaVM *vm, char *optionsString, void *reserved) 104 #else 105 Agent_OnAttach(JavaVM *vm, char *optionsString, void *reserved) 106 #endif 107 { 108 jvmtiEventCallbacks eventCallbacks; 109 jvmtiCapabilities caps; 110 jvmtiEnv* jvmti = NULL; 111 JNIEnv* jni = NULL; 112 113 if (!NSK_VERIFY((options = (Options*) nsk_aod_createOptions(optionsString)) != NULL)) 114 return JNI_ERR; 115 116 agentName = nsk_aod_getOptionValue(options, NSK_AOD_AGENT_NAME_OPTION); 117 118 if ((jni = (JNIEnv*) nsk_aod_createJNIEnv(vm)) == NULL) 119 return NSK_FALSE; 120 121 if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(vm, reserved)) != NULL)) 122 return JNI_ERR; 123 124 memset(&caps, 0, sizeof(caps)); 125 caps.can_generate_monitor_events = 1; 126 if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps))) { 127 return JNI_ERR; 128 } 129 130 memset(&eventCallbacks,0, sizeof(eventCallbacks)); 131 eventCallbacks.MonitorContendedEntered = monitorContentedEnteredHandler; 132 eventCallbacks.MonitorContendedEnter = monitorContentedEnterHandler; 133 if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&eventCallbacks, sizeof(eventCallbacks)))) { 134 return JNI_ERR; 135 } 136 137 if (!(nsk_jvmti_aod_enableEvents(jvmti, testEvents, testEventsNumber))) { 138 return JNI_ERR; 139 } 140 141 NSK_DISPLAY1("%s: initialization was done\n", agentName); 142 143 if (!NSK_VERIFY(nsk_aod_agentLoaded(jni, agentName))) 144 return JNI_ERR; 145 146 return JNI_OK; 147 } 148 149 }