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 #define OBJECTS_FOR_ALLOCATION_TEST_CLASS_NAME "Lnsk/jvmti/AttachOnDemand/attach022/ClassForAllocationEventsTest;" 34 35 static jvmtiEnv* jvmti; 36 static Options* options = NULL; 37 static const char* agentName; 38 39 static jvmtiEvent testEvents[] = {JVMTI_EVENT_OBJECT_FREE, JVMTI_EVENT_VM_OBJECT_ALLOC}; 40 static const int testEventsNumber = 2; 41 42 static volatile int taggedObjectsCounter = 0; 43 static volatile int freedObjectsCounter = 0; 44 45 static jrawMonitorID objectTagMonitor; 46 static jrawMonitorID objectFreeMonitor; 47 48 volatile int success = 1; 49 50 volatile int agentFinished; 51 52 void shutdownAgent(JNIEnv* jni) { 53 if (agentFinished) 54 return; 55 56 if (!nsk_jvmti_aod_disableEvents(jvmti, testEvents, testEventsNumber)) 57 success = 0; 58 59 nsk_aod_agentFinished(jni, agentName, success); 60 61 agentFinished = 1; 62 } 63 64 JNIEXPORT jboolean JNICALL 65 Java_nsk_jvmti_AttachOnDemand_attach022_attach022Target_shutdownAgent(JNIEnv * jni, 66 jclass klass, jint expectedTaggedObjectsCounter) { 67 68 if (taggedObjectsCounter != expectedTaggedObjectsCounter) { 69 success = 0; 70 NSK_COMPLAIN2("ERROR: unexpected taggedObjectsCounter: %d (expected value is %d)\n", taggedObjectsCounter, expectedTaggedObjectsCounter); 71 } 72 73 if (taggedObjectsCounter != freedObjectsCounter) { 74 success = 0; 75 NSK_COMPLAIN2("ERROR: taggedObjectsCounter != freedObjectsCounter (taggedObjectsCounter: %d, freedObjectsCounter: %d)\n", 76 taggedObjectsCounter, freedObjectsCounter); 77 } 78 79 shutdownAgent(jni); 80 81 return success ? JNI_TRUE : JNI_FALSE; 82 } 83 84 void JNICALL objectFreeHandler(jvmtiEnv *jvmti, jlong tag) { 85 NSK_DISPLAY2("%s: ObjectFree event received (object tag: %ld)\n", agentName, tag); 86 87 if (NSK_JVMTI_VERIFY(jvmti->RawMonitorEnter(objectFreeMonitor))) { 88 89 freedObjectsCounter++; 90 91 if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorExit(objectFreeMonitor))) { 92 success = 0; 93 } 94 } else { 95 success = 0; 96 } 97 } 98 99 #define ATTACH022_TARGET_APP_CLASS_NAME "nsk/jvmti/AttachOnDemand/attach022/attach022Target" 100 101 int registerNativeMethods(JNIEnv* jni) { 102 jclass appClass; 103 JNINativeMethod nativeMethods[] = { 104 {(char*)"shutdownAgent", (char*)"(I)Z", 105 (void*) Java_nsk_jvmti_AttachOnDemand_attach022_attach022Target_shutdownAgent}}; 106 jint nativeMethodsNumber = 1; 107 108 if (!NSK_JNI_VERIFY(jni, (appClass = 109 jni->FindClass(ATTACH022_TARGET_APP_CLASS_NAME)) != NULL)) { 110 return NSK_FALSE; 111 } 112 113 if (!NSK_JNI_VERIFY(jni, 114 (jni->RegisterNatives(appClass, nativeMethods, nativeMethodsNumber) == 0))) { 115 return NSK_FALSE; 116 } 117 118 return NSK_TRUE; 119 } 120 121 void JNICALL vmObjectAllocHandler(jvmtiEnv * jvmti, 122 JNIEnv * jni, 123 jthread thread, 124 jobject object, 125 jclass object_class, 126 jlong size) { 127 char className[MAX_STRING_LENGTH]; 128 129 if (!nsk_jvmti_aod_getClassName(jvmti, object_class, className)) { 130 success = 0; 131 shutdownAgent(jni); 132 return; 133 } 134 135 NSK_DISPLAY2("%s: ObjectAlloc event received (object class: %s)\n", agentName, className); 136 137 if (!strcmp(className, OBJECTS_FOR_ALLOCATION_TEST_CLASS_NAME)) { 138 if (NSK_JVMTI_VERIFY(jvmti->RawMonitorEnter(objectTagMonitor))) { 139 jlong tagValue = taggedObjectsCounter + 1; 140 141 142 if (!NSK_JVMTI_VERIFY(jvmti->SetTag(object, tagValue))) { 143 NSK_COMPLAIN1("%s: failed to set tag\n", agentName); 144 success = 0; 145 } else { 146 NSK_DISPLAY2("%s: object was tagged (tag value: %ld)\n", agentName, tagValue); 147 taggedObjectsCounter++; 148 } 149 150 if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorExit(objectTagMonitor))) { 151 success = 0; 152 } 153 } else { 154 success = 0; 155 } 156 } 157 158 if (!success) { 159 NSK_COMPLAIN1("%s: error happened during agent work, stop agent\n", agentName); 160 shutdownAgent(jni); 161 } 162 } 163 164 #ifdef STATIC_BUILD 165 JNIEXPORT jint JNI_OnLoad_attach022Agent00(JavaVM *jvm, char *options, void *reserved) { 166 return JNI_VERSION_1_8; 167 } 168 #endif 169 170 JNIEXPORT jint JNICALL 171 #ifdef STATIC_BUILD 172 Agent_OnAttach_attach022Agent00(JavaVM *vm, char *optionsString, void *reserved) 173 #else 174 Agent_OnAttach(JavaVM *vm, char *optionsString, void *reserved) 175 #endif 176 { 177 jvmtiEventCallbacks eventCallbacks; 178 jvmtiCapabilities caps; 179 JNIEnv* jni; 180 181 if (!NSK_VERIFY((options = (Options*) nsk_aod_createOptions(optionsString)) != NULL)) 182 return JNI_ERR; 183 184 agentName = nsk_aod_getOptionValue(options, NSK_AOD_AGENT_NAME_OPTION); 185 186 if ((jni = (JNIEnv*) nsk_aod_createJNIEnv(vm)) == NULL) 187 return JNI_ERR; 188 189 if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(vm, reserved)) != NULL)) 190 return JNI_ERR; 191 192 if (!NSK_VERIFY(registerNativeMethods(jni))) { 193 return JNI_ERR; 194 } 195 196 if (!NSK_JVMTI_VERIFY(jvmti->CreateRawMonitor("ObjectTagMonitor", &objectTagMonitor))) { 197 return JNI_ERR; 198 } 199 200 if (!NSK_JVMTI_VERIFY(jvmti->CreateRawMonitor("ObjectFreeMonitor", &objectFreeMonitor))) { 201 return JNI_ERR; 202 } 203 204 memset(&caps, 0, sizeof(caps)); 205 caps.can_tag_objects = 1; 206 caps.can_generate_object_free_events = 1; 207 caps.can_generate_vm_object_alloc_events = 1; 208 if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps)) ) { 209 return JNI_ERR; 210 } 211 212 memset(&eventCallbacks,0, sizeof(eventCallbacks)); 213 eventCallbacks.ObjectFree = objectFreeHandler; 214 eventCallbacks.VMObjectAlloc = vmObjectAllocHandler; 215 if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&eventCallbacks, sizeof(eventCallbacks))) ) { 216 return JNI_ERR; 217 } 218 219 if (!(nsk_jvmti_aod_enableEvents(jvmti, testEvents, testEventsNumber))) { 220 return JNI_ERR; 221 } 222 223 NSK_DISPLAY1("%s: initialization was done\n", agentName); 224 225 if (!NSK_VERIFY(nsk_aod_agentLoaded(jni, agentName))) 226 return JNI_ERR; 227 228 return JNI_OK; 229 } 230 231 }