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 <jni.h> 24 #include <jvmti.h> 25 #include "agent_common.h" 26 #include <string.h> 27 #include "jvmti_tools.h" 28 29 extern "C" { 30 #define FILE_NAME "nsk/jvmti/scenarios/hotswap/HS302/hs302t004r/MyClass" 31 #define CLASS_NAME "Lnsk/jvmti/scenarios/hotswap/HS302/hs302t004r/MyClass;" 32 33 void JNICALL callbackClassPrepare(jvmtiEnv *jvmti_env, 34 JNIEnv* jni_env, 35 jthread thread, 36 jclass klass) { 37 char * className; 38 char * generic; 39 int redefineNumber=0; 40 jvmti_env->GetClassSignature(klass, &className, &generic); 41 if (strcmp(className,CLASS_NAME) == 0) { 42 char fileName[512]; 43 nsk_jvmti_getFileName(redefineNumber, FILE_NAME, fileName, 44 sizeof(fileName)/sizeof(char)); 45 nsk_jvmti_disableNotification(jvmti_env, JVMTI_EVENT_CLASS_PREPARE, NULL ); 46 if ( nsk_jvmti_redefineClass(jvmti_env, klass,fileName) == NSK_TRUE ) { 47 nsk_printf("Redefine successful ..\n"); 48 } else { 49 nsk_printf("# error :: Redefine failed..\n"); 50 } 51 } 52 } 53 54 #ifdef STATIC_BUILD 55 JNIEXPORT jint JNICALL Agent_OnLoad_hs302t004(JavaVM *jvm, char *options, void *reserved) { 56 return Agent_Initialize(jvm, options, reserved); 57 } 58 JNIEXPORT jint JNICALL Agent_OnAttach_hs302t004(JavaVM *jvm, char *options, void *reserved) { 59 return Agent_Initialize(jvm, options, reserved); 60 } 61 JNIEXPORT jint JNI_OnLoad_hs302t004(JavaVM *jvm, char *options, void *reserved) { 62 return JNI_VERSION_1_8; 63 } 64 #endif 65 jint Agent_Initialize(JavaVM *vm, char *options, void *reserved) { 66 jint rc ; 67 jvmtiEnv * jvmti; 68 nsk_printf("Agent:: VM.. Started..\n"); 69 rc=vm->GetEnv((void **)&jvmti, JVMTI_VERSION_1_1); 70 if ( rc!= JNI_OK ) { 71 nsk_printf("Agent:: Could not load JVMTI interface \n"); 72 return JNI_ERR; 73 } else { 74 jvmtiCapabilities caps; 75 jvmtiEventCallbacks eventCallbacks; 76 if (nsk_jvmti_parseOptions(options) == NSK_FALSE ) { 77 nsk_printf("# error agent Failed to parse options \n"); 78 return JNI_ERR; 79 } 80 memset(&caps, 0, sizeof(caps)); 81 caps.can_redefine_classes = 1; 82 caps.can_generate_all_class_hook_events=1; 83 jvmti->AddCapabilities(&caps); 84 memset(&eventCallbacks, 0, sizeof(eventCallbacks)); 85 eventCallbacks.ClassPrepare = &callbackClassPrepare; 86 rc=jvmti->SetEventCallbacks(&eventCallbacks, sizeof(eventCallbacks)); 87 if (rc != JVMTI_ERROR_NONE) { 88 nsk_printf(" Agent:: Error occured while setting event call back \n"); 89 return JNI_ERR; 90 } 91 if ( nsk_jvmti_enableNotification(jvmti, JVMTI_EVENT_CLASS_PREPARE, NULL) == NSK_TRUE ) { 92 nsk_printf(" Enabled. noftification.."); 93 } else { 94 nsk_printf(" Failed to Enable .."); 95 } 96 } 97 return JNI_OK; 98 } 99 }