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 #include "ExceptionCheckingJniEnv.hpp" 31 32 extern "C" { 33 34 #define OBJECTS_FOR_ALLOCATION_TEST_CLASS_NAME "Lnsk/jvmti/AttachOnDemand/attach022/ClassForAllocationEventsTest;" 35 36 static jvmtiEnv* jvmti; 37 static Options* options = NULL; 38 static const char* agentName; 39 40 static jvmtiEvent testEvents[] = { JVMTI_EVENT_OBJECT_FREE, JVMTI_EVENT_VM_OBJECT_ALLOC }; 41 static const int testEventsNumber = 2; 42 43 static volatile int taggedObjectsCounter = 0; 44 static volatile int freedObjectsCounter = 0; 45 46 static jrawMonitorID objectTagMonitor; 47 static jrawMonitorID objectFreeMonitor; 48 49 volatile int success = 1; 50 51 volatile int agentFinished; 52 53 void shutdownAgent(JNIEnv* jni) { 54 if (agentFinished) 55 return; 56 57 if (!nsk_jvmti_aod_disableEvents(jvmti, testEvents, testEventsNumber)) 58 success = 0; 59 60 nsk_aod_agentFinished(jni, agentName, success); 61 62 agentFinished = 1; 63 } 64 65 JNIEXPORT jboolean JNICALL 66 Java_nsk_jvmti_AttachOnDemand_attach022_attach022Target_shutdownAgent(JNIEnv * jni, 67 jclass klass, jint expectedTaggedObjectsCounter) { 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 void registerNativeMethods(JNIEnv* jni_env) { 101 ExceptionCheckingJniEnvPtr jni(jni_env); 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 appClass = jni->FindClass(ATTACH022_TARGET_APP_CLASS_NAME, TRACE_JNI_CALL); 109 jni->RegisterNatives(appClass, nativeMethods, nativeMethodsNumber, TRACE_JNI_CALL); 110 } 111 112 void JNICALL vmObjectAllocHandler(jvmtiEnv * jvmti, 113 JNIEnv * jni, 114 jthread thread, 115 jobject object, 116 jclass object_class, 117 jlong size) { 118 char className[MAX_STRING_LENGTH]; 119 120 if (!nsk_jvmti_aod_getClassName(jvmti, object_class, className)) { 121 success = 0; 122 shutdownAgent(jni); 123 return; 124 } 125 126 NSK_DISPLAY2("%s: ObjectAlloc event received (object class: %s)\n", agentName, className); 127 128 if (!strcmp(className, OBJECTS_FOR_ALLOCATION_TEST_CLASS_NAME)) { 129 if (NSK_JVMTI_VERIFY(jvmti->RawMonitorEnter(objectTagMonitor))) { 130 jlong tagValue = taggedObjectsCounter + 1; 131 132 if (!NSK_JVMTI_VERIFY(jvmti->SetTag(object, tagValue))) { 133 NSK_COMPLAIN1("%s: failed to set tag\n", agentName); 134 success = 0; 135 } else { 136 NSK_DISPLAY2("%s: object was tagged (tag value: %ld)\n", agentName, tagValue); 137 taggedObjectsCounter++; 138 } 139 140 if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorExit(objectTagMonitor))) { 141 success = 0; 142 } 143 } else { 144 success = 0; 145 } 146 } 147 148 if (!success) { 149 NSK_COMPLAIN1("%s: error happened during agent work, stop agent\n", agentName); 150 shutdownAgent(jni); 151 } 152 } 153 154 #ifdef STATIC_BUILD 155 JNIEXPORT jint JNI_OnLoad_attach022Agent00(JavaVM *jvm, char *options, void *reserved) { 156 return JNI_VERSION_1_8; 157 } 158 #endif 159 160 JNIEXPORT jint JNICALL 161 #ifdef STATIC_BUILD 162 Agent_OnAttach_attach022Agent00(JavaVM *vm, char *optionsString, void *reserved) 163 #else 164 Agent_OnAttach(JavaVM *vm, char *optionsString, void *reserved) 165 #endif 166 { 167 jvmtiEventCallbacks eventCallbacks; 168 jvmtiCapabilities caps; 169 JNIEnv* jni; 170 171 options = (Options*) nsk_aod_createOptions(optionsString); 172 if (!NSK_VERIFY(options != NULL)) 173 return JNI_ERR; 174 175 agentName = nsk_aod_getOptionValue(options, NSK_AOD_AGENT_NAME_OPTION); 176 177 jni = (JNIEnv*) nsk_aod_createJNIEnv(vm); 178 if (jni == NULL) 179 return JNI_ERR; 180 181 jvmti = nsk_jvmti_createJVMTIEnv(vm, reserved); 182 if (!NSK_VERIFY(jvmti != NULL)) 183 return JNI_ERR; 184 185 registerNativeMethods(jni); 186 187 if (!NSK_JVMTI_VERIFY(jvmti->CreateRawMonitor("ObjectTagMonitor", &objectTagMonitor))) { 188 return JNI_ERR; 189 } 190 191 if (!NSK_JVMTI_VERIFY(jvmti->CreateRawMonitor("ObjectFreeMonitor", &objectFreeMonitor))) { 192 return JNI_ERR; 193 } 194 195 memset(&caps, 0, sizeof(caps)); 196 caps.can_tag_objects = 1; 197 caps.can_generate_object_free_events = 1; 198 caps.can_generate_vm_object_alloc_events = 1; 199 if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps))) { 200 return JNI_ERR; 201 } 202 203 memset(&eventCallbacks,0, sizeof(eventCallbacks)); 204 eventCallbacks.ObjectFree = objectFreeHandler; 205 eventCallbacks.VMObjectAlloc = vmObjectAllocHandler; 206 if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&eventCallbacks, sizeof(eventCallbacks)))) { 207 return JNI_ERR; 208 } 209 210 if (!(nsk_jvmti_aod_enableEvents(jvmti, testEvents, testEventsNumber))) { 211 return JNI_ERR; 212 } 213 214 NSK_DISPLAY1("%s: initialization was done\n", agentName); 215 216 if (!NSK_VERIFY(nsk_aod_agentLoaded(jni, agentName))) 217 return JNI_ERR; 218 219 return JNI_OK; 220 } 221 222 }