1 /*
2 * Copyright (c) 2007, 2019, 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
Agent_OnLoad_hs104t002(JavaVM * jvm,char * options,void * reserved)41 JNIEXPORT jint JNICALL Agent_OnLoad_hs104t002(JavaVM *jvm, char *options, void *reserved) {
42 return Agent_Initialize(jvm, options, reserved);
43 }
Agent_OnAttach_hs104t002(JavaVM * jvm,char * options,void * reserved)44 JNIEXPORT jint JNICALL Agent_OnAttach_hs104t002(JavaVM *jvm, char *options, void *reserved) {
45 return Agent_Initialize(jvm, options, reserved);
46 }
JNI_OnLoad_hs104t002(JavaVM * jvm,char * options,void * reserved)47 JNIEXPORT jint JNI_OnLoad_hs104t002(JavaVM *jvm, char *options, void *reserved) {
48 return JNI_VERSION_1_8;
49 }
50 #endif
Agent_Initialize(JavaVM * vm,char * options,void * reserved)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)) {
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
Java_nsk_jvmti_scenarios_hotswap_HS104_hs104t002_hs104t002_redefineClasses(JNIEnv * jni,jclass classObject)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)) {
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 }
93