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 freedObjectsCounter++; 89 90 if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorExit(objectFreeMonitor))) { 91 success = 0; 92 } 93 } else { 94 success = 0; 95 } 96 } 97 98 #define ATTACH022_TARGET_APP_CLASS_NAME "nsk/jvmti/AttachOnDemand/attach022/attach022Target" 99 100 int registerNativeMethods(JNIEnv* jni) { 101 jclass appClass; 102 JNINativeMethod nativeMethods[] = { 103 {(char*)"shutdownAgent", (char*)"(I)Z", 104 (void*) Java_nsk_jvmti_AttachOnDemand_attach022_attach022Target_shutdownAgent}}; 105 jint nativeMethodsNumber = 1; 106 107 appClass = jni->FindClass(ATTACH022_TARGET_APP_CLASS_NAME); 108 if (!NSK_JNI_VERIFY(jni, appClass != NULL)) { 109 return NSK_FALSE; 110 } 111 112 if (!NSK_JNI_VERIFY(jni, 113 (jni->RegisterNatives(appClass, nativeMethods, nativeMethodsNumber) == 0))) { 114 return NSK_FALSE; 115 } 116 117 return NSK_TRUE; 118 } 119 120 void JNICALL vmObjectAllocHandler(jvmtiEnv * jvmti, 121 JNIEnv * jni, 122 jthread thread, 123 jobject object, 124 jclass object_class, 125 jlong size) { 126 char className[MAX_STRING_LENGTH]; 127 128 if (!nsk_jvmti_aod_getClassName(jvmti, object_class, className)) { 129 success = 0; 130 shutdownAgent(jni); 131 return; 132 } 133 134 NSK_DISPLAY2("%s: ObjectAlloc event received (object class: %s)\n", agentName, className); 135 136 if (!strcmp(className, OBJECTS_FOR_ALLOCATION_TEST_CLASS_NAME)) { 137 if (NSK_JVMTI_VERIFY(jvmti->RawMonitorEnter(objectTagMonitor))) { 138 jlong tagValue = taggedObjectsCounter + 1; 139 140 if (!NSK_JVMTI_VERIFY(jvmti->SetTag(object, tagValue))) { 141 NSK_COMPLAIN1("%s: failed to set tag\n", agentName); 142 success = 0; 143 } else { 144 NSK_DISPLAY2("%s: object was tagged (tag value: %ld)\n", agentName, tagValue); 145 taggedObjectsCounter++; 146 } 147 148 if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorExit(objectTagMonitor))) { 149 success = 0; 150 } 151 } else { 152 success = 0; 153 } 154 } 155 156 if (!success) { 157 NSK_COMPLAIN1("%s: error happened during agent work, stop agent\n", agentName); 158 shutdownAgent(jni); 159 } 160 } 161 162 #ifdef STATIC_BUILD 163 JNIEXPORT jint JNI_OnLoad_attach022Agent00(JavaVM *jvm, char *options, void *reserved) { 164 return JNI_VERSION_1_8; 165 } 166 #endif 167 168 JNIEXPORT jint JNICALL 169 #ifdef STATIC_BUILD 170 Agent_OnAttach_attach022Agent00(JavaVM *vm, char *optionsString, void *reserved) 171 #else 172 Agent_OnAttach(JavaVM *vm, char *optionsString, void *reserved) 173 #endif 174 { 175 jvmtiEventCallbacks eventCallbacks; 176 jvmtiCapabilities caps; 177 JNIEnv* jni; 178 179 options = (Options*) nsk_aod_createOptions(optionsString); 180 if (!NSK_VERIFY(options != NULL)) 181 return JNI_ERR; 182 183 agentName = nsk_aod_getOptionValue(options, NSK_AOD_AGENT_NAME_OPTION); 184 185 jni = (JNIEnv*) nsk_aod_createJNIEnv(vm); 186 if (jni == NULL) 187 return JNI_ERR; 188 189 jvmti = nsk_jvmti_createJVMTIEnv(vm, reserved); 190 if (!NSK_VERIFY(jvmti != NULL)) 191 return JNI_ERR; 192 193 if (!NSK_VERIFY(registerNativeMethods(jni))) { 194 return JNI_ERR; 195 } 196 197 if (!NSK_JVMTI_VERIFY(jvmti->CreateRawMonitor("ObjectTagMonitor", &objectTagMonitor))) { 198 return JNI_ERR; 199 } 200 201 if (!NSK_JVMTI_VERIFY(jvmti->CreateRawMonitor("ObjectFreeMonitor", &objectFreeMonitor))) { 202 return JNI_ERR; 203 } 204 205 memset(&caps, 0, sizeof(caps)); 206 caps.can_tag_objects = 1; 207 caps.can_generate_object_free_events = 1; 208 caps.can_generate_vm_object_alloc_events = 1; 209 if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps))) { 210 return JNI_ERR; 211 } 212 213 memset(&eventCallbacks,0, sizeof(eventCallbacks)); 214 eventCallbacks.ObjectFree = objectFreeHandler; 215 eventCallbacks.VMObjectAlloc = vmObjectAllocHandler; 216 if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&eventCallbacks, sizeof(eventCallbacks)))) { 217 return JNI_ERR; 218 } 219 220 if (!(nsk_jvmti_aod_enableEvents(jvmti, testEvents, testEventsNumber))) { 221 return JNI_ERR; 222 } 223 224 NSK_DISPLAY1("%s: initialization was done\n", agentName); 225 226 if (!NSK_VERIFY(nsk_aod_agentLoaded(jni, agentName))) 227 return JNI_ERR; 228 229 return JNI_OK; 230 } 231 232 }