| /* |
| * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <jni.h> |
| #include <jvmti.h> |
| #include <aod.h> |
| #include <jvmti_aod.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* |
| * Expected agent work scenario: |
| * - during initialization agent enables events VMObjectAlloc |
| * - agent receives VMObjectAlloc event for instance of InterruptedException, |
| * redefines class InterruptedException and finishes work |
| */ |
| |
| #define REDEFINED_CLASS_NAME "Ljava/lang/InterruptedException;" |
| #define REDEFINED_CLASS_FILE_NAME "java/lang/InterruptedException" |
| |
| static Options* options = NULL; |
| static const char* agentName; |
| |
| static jvmtiEvent testEvents[] = {JVMTI_EVENT_VM_OBJECT_ALLOC}; |
| |
| static const int testEventsNumber = 1; |
| |
| void JNICALL vmObjectAllocHandler(jvmtiEnv * jvmti, |
| JNIEnv * jni, |
| jthread thread, |
| jobject object, |
| jclass object_class, |
| jlong size) { |
| char className[MAX_STRING_LENGTH]; |
| |
| if (!nsk_jvmti_aod_getClassName(jvmti, object_class, className)) { |
| nsk_jvmti_aod_disableEventsAndFinish(agentName, testEvents, testEventsNumber, 0, jvmti, jni); |
| return; |
| } |
| |
| NSK_DISPLAY2("%s: ObjectAlloc event received (object class: %s)\n", agentName, className); |
| |
| if (!strcmp(className, REDEFINED_CLASS_NAME)) { |
| int success = 1; |
| |
| if (!NSK_VERIFY(nsk_jvmti_aod_redefineClass(options, jvmti, object_class, REDEFINED_CLASS_FILE_NAME))) { |
| NSK_COMPLAIN1("%s: failed to redefine class\n", agentName); |
| success = 0; |
| } |
| |
| nsk_jvmti_aod_disableEventsAndFinish(agentName, testEvents, testEventsNumber, success, jvmti, jni); |
| } |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNI_OnLoad_attach002aAgent00(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| |
| JNIEXPORT jint JNICALL |
| #ifdef STATIC_BUILD |
| Agent_OnAttach_attach002aAgent00(JavaVM *vm, char *optionsString, void *reserved) |
| #else |
| Agent_OnAttach(JavaVM *vm, char *optionsString, void *reserved) |
| #endif |
| { |
| jvmtiEventCallbacks eventCallbacks; |
| jvmtiCapabilities caps; |
| jvmtiEnv* jvmti = NULL; |
| JNIEnv* jni = NULL; |
| |
| if (!NSK_VERIFY((options = (Options*) nsk_aod_createOptions(optionsString)) != NULL)) |
| return JNI_ERR; |
| |
| agentName = nsk_aod_getOptionValue(options, NSK_AOD_AGENT_NAME_OPTION); |
| |
| if ((jni = (JNIEnv*) nsk_aod_createJNIEnv(vm)) == NULL) |
| return NSK_FALSE; |
| |
| if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(vm, reserved)) != NULL)) |
| return JNI_ERR; |
| |
| memset(&caps, 0, sizeof(caps)); |
| caps.can_redefine_classes = 1; |
| caps.can_generate_vm_object_alloc_events = 1; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities, jvmti, &caps)) ) { |
| return JNI_ERR; |
| } |
| |
| memset(&eventCallbacks,0, sizeof(eventCallbacks)); |
| eventCallbacks.VMObjectAlloc = vmObjectAllocHandler; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetEventCallbacks, jvmti, &eventCallbacks, sizeof(eventCallbacks))) ) { |
| return JNI_ERR; |
| } |
| |
| if (!(nsk_jvmti_aod_enableEvents(jvmti, testEvents, testEventsNumber))) { |
| return JNI_ERR; |
| } |
| |
| NSK_DISPLAY1("%s: initialization was done\n", agentName); |
| |
| if (!NSK_VERIFY(nsk_aod_agentLoaded(jni, agentName))) |
| return JNI_ERR; |
| |
| return JNI_OK; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |