| /* |
| * 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 |
| |
| /* |
| * In this test the same agent library is attached 3 times, but with |
| * different options. In such scenario functions nsk_jvmti_aod_addMultiagentsOptions and |
| * nsk_jvmti_aod_getMultiagentsOptions are used. |
| * |
| * Each agent from ClassLoad event handler tries to redefine class ClassToRedefine and |
| * finishes work. |
| */ |
| |
| #define REDEFINED_CLASS_NAME "Lnsk/jvmti/AttachOnDemand/attach046/ClassToRedefine;" |
| #define REDEFINED_CLASS_FILE_NAME "nsk/jvmti/AttachOnDemand/attach046/ClassToRedefine" |
| |
| void JNICALL classLoadHandler( |
| jvmtiEnv *jvmti, |
| JNIEnv* jni, |
| jthread thread, |
| jclass klass) { |
| char className[MAX_STRING_LENGTH]; |
| const char* agentName; |
| Options* options; |
| |
| if (!NSK_VERIFY((options = nsk_jvmti_aod_getMultiagentsOptions(jvmti)) != NULL)) { |
| NSK_COMPLAIN0("Failed to get agents's options\n"); |
| nsk_jvmti_aod_disableEvent(jvmti, JVMTI_EVENT_CLASS_LOAD); |
| // can't call nsk_aod_agentFinished because of without options can't get agent's name |
| return; |
| } |
| |
| agentName = nsk_aod_getOptionValue(options, NSK_AOD_AGENT_NAME_OPTION); |
| |
| if (!nsk_jvmti_aod_getClassName(jvmti, klass, className)) { |
| nsk_jvmti_aod_disableEventAndFinish(agentName, JVMTI_EVENT_CLASS_LOAD, 0, jvmti, jni); |
| return; |
| } |
| |
| NSK_DISPLAY2("%s: ClassLoad event was received for class '%s'\n", agentName, className); |
| |
| if (!strcmp(className, REDEFINED_CLASS_NAME)) { |
| |
| NSK_DISPLAY1("%s: redefining class\n", agentName); |
| |
| if (!NSK_VERIFY(nsk_jvmti_aod_redefineClass(options, jvmti, klass, REDEFINED_CLASS_FILE_NAME))) { |
| NSK_COMPLAIN1("%s: failed to redefine class\n", agentName); |
| nsk_jvmti_aod_disableEventAndFinish(agentName, JVMTI_EVENT_CLASS_LOAD, 0, jvmti, jni); |
| } else { |
| nsk_jvmti_aod_disableEventAndFinish(agentName, JVMTI_EVENT_CLASS_LOAD, 1, jvmti, jni); |
| } |
| } |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNI_OnLoad_attach046Agent00(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| |
| JNIEXPORT jint JNICALL |
| #ifdef STATIC_BUILD |
| Agent_OnAttach_attach046Agent00(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; |
| Options* options; |
| const char* agentName; |
| |
| 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; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities, jvmti, &caps)) ) { |
| return JNI_ERR; |
| } |
| |
| memset(&eventCallbacks,0, sizeof(eventCallbacks)); |
| eventCallbacks.ClassLoad = classLoadHandler; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetEventCallbacks, jvmti, &eventCallbacks, sizeof(eventCallbacks))) ) { |
| return JNI_ERR; |
| } |
| |
| if (!(nsk_jvmti_aod_enableEvent(jvmti, JVMTI_EVENT_CLASS_LOAD))) { |
| return JNI_ERR; |
| } |
| |
| if (!NSK_VERIFY(nsk_jvmti_aod_addMultiagentsOptions(jvmti, options))) { |
| 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 |