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 #include "JVMTITools.h" 29 #include "jni_tools.h" 30 31 extern "C" { 32 33 #define DIR_NAME "newclass" 34 #define PATH_FORMAT "%s%02d/%s" 35 #define FILE_NAME "nsk/jvmti/scenarios/hotswap/HS104/hs104t002/MyThread" 36 #define SEARCH_NAME "nsk/jvmti/scenarios/hotswap/HS104/hs104t002/MyThread" 37 38 static jvmtiEnv * jvmti; 39 40 #ifdef STATIC_BUILD 41 JNIEXPORT jint JNICALL Agent_OnLoad_hs104t002(JavaVM *jvm, char *options, void *reserved) { 42 return Agent_Initialize(jvm, options, reserved); 43 } 44 JNIEXPORT jint JNICALL Agent_OnAttach_hs104t002(JavaVM *jvm, char *options, void *reserved) { 45 return Agent_Initialize(jvm, options, reserved); 46 } 47 JNIEXPORT jint JNI_OnLoad_hs104t002(JavaVM *jvm, char *options, void *reserved) { 48 return JNI_VERSION_1_8; 49 } 50 #endif 51 jint Agent_Initialize(JavaVM *vm, char *options, void *reserved){ 52 if (!NSK_VERIFY (JNI_OK == vm->GetEnv((void **)&jvmti, JVMTI_VERSION_1_1))) { 53 nsk_printf("#error Agent :: Could not load JVMTI interface.\n"); 54 return JNI_ERR; 55 } else { 56 jvmtiCapabilities caps; 57 if (nsk_jvmti_parseOptions(options) == NSK_FALSE) { 58 nsk_printf("# error agent Failed to parse options \n"); 59 return JNI_ERR; 60 } 61 memset(&caps, 0, sizeof(caps)); 62 caps.can_redefine_classes = 1; 63 if (!NSK_JVMTI_VERIFY (jvmti->AddCapabilities(&caps))) { 64 nsk_printf("#error Agent :: occured while adding capabilities.\n"); 65 return JNI_ERR; 66 } 67 } 68 return JNI_OK; 69 } 70 71 JNIEXPORT void JNICALL 72 Java_nsk_jvmti_scenarios_hotswap_HS104_hs104t002_hs104t002_redefineClasses( 73 JNIEnv *jni, jclass classObject) { 74 jclass cla; 75 char fileName[512]; 76 77 if (!NSK_JNI_VERIFY(jni, (cla = jni->FindClass(SEARCH_NAME)) != NULL)) { 78 nsk_printf(" Agent :: Failed to get class.\n"); 79 nsk_jvmti_agentFailed(); 80 return; 81 } 82 nsk_jvmti_getFileName(0, FILE_NAME, fileName, 83 sizeof(fileName)/sizeof(char)); 84 if (nsk_jvmti_redefineClass(jvmti, cla, fileName) == NSK_TRUE) { 85 nsk_printf(" Agent :: Redefine successfull.\n"); 86 } else { 87 nsk_printf("# error Agent :: Redefine failed.\n"); 88 nsk_jvmti_agentFailed(); 89 } 90 } 91 92 }