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 31 #define FILE_NAME "nsk/jvmti/scenarios/hotswap/HS302/hs302t002/MyClass" 32 #define CLASS_NAME "Lnsk/jvmti/scenarios/hotswap/HS302/hs302t002/MyClass;" 33 34 void JNICALL callbackClassPrepare(jvmtiEnv *jvmti_env, 35 JNIEnv* jni_env, 36 jthread thread, 37 jclass klass) { 38 char * className; 39 char * generic; 40 int redefineNumber; 41 redefineNumber=0; 42 jvmti_env->GetClassSignature(klass, &className, &generic); 43 if (strcmp(className,CLASS_NAME) == 0) { 44 char fileName[512]; 45 nsk_jvmti_disableNotification(jvmti_env, JVMTI_EVENT_CLASS_PREPARE, NULL); 46 nsk_jvmti_getFileName(redefineNumber, FILE_NAME, fileName, sizeof(fileName)/sizeof(char)); 47 if (nsk_jvmti_redefineClass(jvmti_env, klass, fileName) == NSK_TRUE) { 48 nsk_printf("Redefine successful ..\n"); 49 } else { 50 nsk_printf("Redefine failed .. \n"); 51 } 52 } 53 } 54 55 #ifdef STATIC_BUILD 56 JNIEXPORT jint JNICALL Agent_OnLoad_hs302t002(JavaVM *jvm, char *options, void *reserved) { 57 return Agent_Initialize(jvm, options, reserved); 58 } 59 JNIEXPORT jint JNICALL Agent_OnAttach_hs302t002(JavaVM *jvm, char *options, void *reserved) { 60 return Agent_Initialize(jvm, options, reserved); 61 } 62 JNIEXPORT jint JNI_OnLoad_hs302t002(JavaVM *jvm, char *options, void *reserved) { 63 return JNI_VERSION_1_8; 64 } 65 #endif 66 jint Agent_Initialize(JavaVM *vm, char *options, void *reserved) { 67 jint rc ; 68 jvmtiEnv * jvmti; 69 70 nsk_printf("Agent:: VM.. Started..\n"); 71 rc=vm->GetEnv((void **)&jvmti, JVMTI_VERSION_1_1); 72 if (rc != JNI_OK) { 73 nsk_printf("Agent:: Could not load JVMTI interface \n"); 74 return JNI_ERR; 75 } else { 76 jvmtiCapabilities caps; 77 jvmtiEventCallbacks eventCallbacks; 78 79 if (nsk_jvmti_parseOptions(options) == NSK_FALSE) { 80 nsk_printf("# error agent Failed to parse options \n"); 81 return JNI_ERR; 82 } 83 84 memset(&caps, 0, sizeof(caps)); 85 caps.can_redefine_classes = 1; 86 caps.can_generate_all_class_hook_events=1; 87 jvmti->AddCapabilities(&caps); 88 memset(&eventCallbacks, 0, sizeof(eventCallbacks)); 89 eventCallbacks.ClassPrepare = &callbackClassPrepare; 90 rc=jvmti->SetEventCallbacks(&eventCallbacks, 91 sizeof(eventCallbacks)); 92 93 if (rc != JVMTI_ERROR_NONE) { 94 nsk_printf(" Agent:: Error occured while setting event call back \n"); 95 return JNI_ERR; 96 } 97 if (nsk_jvmti_enableNotification(jvmti, JVMTI_EVENT_CLASS_PREPARE, 98 NULL) == NSK_TRUE) { 99 nsk_printf(" Enabled. noftification.."); 100 } else { 101 nsk_printf(" Failed to Enable .."); 102 } 103 } 104 return JNI_OK; 105 } 106 107 }