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 * Agent receives expected number of ClassPrepare events and finishes work 35 * (events should be provoked by target application) 36 */ 37 38 #define EXPECTED_EVENTS_NUMBER 500 39 40 static Options* options = NULL; 41 static const char* agentName; 42 43 static jrawMonitorID eventsCounterMonitor; 44 45 static volatile int eventsCounter = 0; 46 47 void JNICALL classPrepareHandler( 48 jvmtiEnv *jvmti, 49 JNIEnv* jni, 50 jthread thread, 51 jclass klass) { 52 int success = 1; 53 char className[MAX_STRING_LENGTH]; 54 jint loadedClassesCount; 55 jclass *loadedClasses; 56 57 if (!nsk_jvmti_aod_getClassName(jvmti, klass, className)) { 58 nsk_jvmti_aod_disableEventAndFinish(agentName, JVMTI_EVENT_CLASS_PREPARE, 0, jvmti, jni); 59 return; 60 } 61 62 if (!NSK_JVMTI_VERIFY(jvmti->GetLoadedClasses(&loadedClassesCount, &loadedClasses))) { 63 NSK_COMPLAIN1("%s: failed to get loaded classes\n", agentName); 64 nsk_jvmti_aod_disableEventAndFinish(agentName, JVMTI_EVENT_CLASS_PREPARE, 0, jvmti, jni); 65 return; 66 } 67 68 nsk_jvmti_aod_deallocate(jvmti, (unsigned char*)loadedClasses); 69 70 if (NSK_JVMTI_VERIFY(jvmti->RawMonitorEnter(eventsCounterMonitor))) { 71 72 eventsCounter++; 73 74 NSK_DISPLAY3("%s: ClassPrepare event received for class '%s' (eventsCounter: %d)\n", agentName, className, eventsCounter); 75 76 if (eventsCounter == EXPECTED_EVENTS_NUMBER) { 77 NSK_DISPLAY2("%s: all expected events were received (eventsCounter: %d)\n", agentName, eventsCounter); 78 79 nsk_jvmti_aod_disableEventAndFinish(agentName, JVMTI_EVENT_CLASS_PREPARE, success, jvmti, jni); 80 } 81 82 if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorExit(eventsCounterMonitor))) { 83 success = 0; 84 } 85 } else { 86 success = 0; 87 } 88 89 if (!success) { 90 nsk_jvmti_aod_disableEventAndFinish(agentName, JVMTI_EVENT_CLASS_PREPARE, 0, jvmti, jni); 91 } 92 } 93 94 #ifdef STATIC_BUILD 95 JNIEXPORT jint JNI_OnLoad_attach045Agent01(JavaVM *jvm, char *options, void *reserved) { 96 return JNI_VERSION_1_8; 97 } 98 #endif 99 100 JNIEXPORT jint JNICALL 101 #ifdef STATIC_BUILD 102 Agent_OnAttach_attach045Agent01(JavaVM *vm, char *optionsString, void *reserved) 103 #else 104 Agent_OnAttach(JavaVM *vm, char *optionsString, void *reserved) 105 #endif 106 { 107 jvmtiEventCallbacks eventCallbacks; 108 jvmtiEnv* jvmti; 109 JNIEnv* jni; 110 111 if (!NSK_VERIFY((options = (Options*) nsk_aod_createOptions(optionsString)) != NULL)) 112 return JNI_ERR; 113 114 agentName = nsk_aod_getOptionValue(options, NSK_AOD_AGENT_NAME_OPTION); 115 116 if ((jni = (JNIEnv*) nsk_aod_createJNIEnv(vm)) == NULL) 117 return JNI_ERR; 118 119 if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(vm, reserved)) != NULL)) 120 return JNI_ERR; 121 122 if (!NSK_JVMTI_VERIFY(jvmti->CreateRawMonitor("attach045-agent01-eventsCounterMonitor", &eventsCounterMonitor))) { 123 return JNI_ERR; 124 } 125 126 memset(&eventCallbacks,0, sizeof(eventCallbacks)); 127 eventCallbacks.ClassPrepare = classPrepareHandler; 128 if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&eventCallbacks, sizeof(eventCallbacks))) ) { 129 return JNI_ERR; 130 } 131 132 if (!(nsk_jvmti_aod_enableEvent(jvmti, JVMTI_EVENT_CLASS_PREPARE))) { 133 return JNI_ERR; 134 } 135 136 NSK_DISPLAY1("%s: initialization was done\n", agentName); 137 138 if (!NSK_VERIFY(nsk_aod_agentLoaded(jni, agentName))) 139 return JNI_ERR; 140 141 return JNI_OK; 142 } 143 144 145 }