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 /** 24 * Please see the ./hs301t002.README file for detailed explanation of this testcase. 25 * 26 */ 27 #include <jni.h> 28 #include <jvmti.h> 29 #include "agent_common.h" 30 #include <string.h> 31 #include "jvmti_tools.h" 32 #include "jni_tools.h" 33 34 extern "C" { 35 #define FILE_NAME "nsk/jvmti/scenarios/hotswap/HS301/hs301t002/MyClass" 36 #define DIR_NAME "newclass" 37 #define PATH_FORMAT "%s%02d/%s" 38 #define SEARCH_NAME "nsk/jvmti/scenarios/hotswap/HS301/hs301t002/MyClass" 39 40 static jvmtiEnv * jvmti; 41 42 #ifdef STATIC_BUILD 43 JNIEXPORT jint JNICALL Agent_OnLoad_hs301t002(JavaVM *jvm, char *options, void *reserved) { 44 return Agent_Initialize(jvm, options, reserved); 45 } 46 JNIEXPORT jint JNICALL Agent_OnAttach_hs301t002(JavaVM *jvm, char *options, void *reserved) { 47 return Agent_Initialize(jvm, options, reserved); 48 } 49 JNIEXPORT jint JNI_OnLoad_hs301t002(JavaVM *jvm, char *options, void *reserved) { 50 return JNI_VERSION_1_8; 51 } 52 #endif 53 jint Agent_Initialize(JavaVM *vm, char *options, void *reserved) { 54 nsk_printf(" Agent:: VM Started.\n"); 55 if ( ! NSK_VERIFY ( JNI_OK == vm->GetEnv((void **)&jvmti, JVMTI_VERSION_1_1) ) ) { 56 nsk_printf(" Agent ::Agent failed to get jvmti env.\n"); 57 return JNI_ERR; 58 } else { 59 jvmtiCapabilities caps; 60 if (nsk_jvmti_parseOptions(options) == NSK_FALSE ) { 61 nsk_printf(" Agent:: ## error agent Failed to parse options.\n"); 62 return JNI_ERR; 63 } 64 memset(&caps, 0, sizeof(caps)); 65 caps.can_redefine_classes = 1; 66 if ( ! NSK_JVMTI_VERIFY (jvmti->AddCapabilities(&caps) ) ) { 67 nsk_printf(" Agent:: Error occured while adding capabilities.\n"); 68 return JNI_ERR; 69 } 70 } 71 return JNI_OK; 72 } 73 74 /** 75 * fixed JNI signature, and droped jclass clsa (paramter from here as it was not used). 76 * 77 */ 78 JNIEXPORT jboolean JNICALL 79 Java_nsk_jvmti_scenarios_hotswap_HS301_hs301t002_hs301t002_redefine(JNIEnv * jni, jobject obj) { 80 jclass cls; 81 jboolean ret; 82 char fileName[512]; 83 int redefineNumber ; 84 85 redefineNumber=0; 86 ret = JNI_FALSE; 87 if (!NSK_JNI_VERIFY(jni, (cls = jni->FindClass(SEARCH_NAME)) != NULL)) { 88 nsk_printf("Agent:: (*JNI)->FindClass(jni, %s) returns `null`.\n", SEARCH_NAME); 89 return NSK_FALSE; 90 } 91 nsk_jvmti_getFileName(redefineNumber, FILE_NAME, fileName, 92 sizeof(fileName)/sizeof(char)); 93 if ( nsk_jvmti_redefineClass(jvmti, cls, fileName) == NSK_TRUE) { 94 nsk_printf("Agent:: MyClass :: Successfully redefined.\n"); 95 ret = JNI_TRUE; 96 } else { 97 nsk_printf("Agent:: MyClass :: Failed to redefine.\n"); 98 } 99 return ret; 100 } 101 102 }