1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/*
* Copyright (c) 2003, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include <stdio.h>
#include <string.h>
#include <jvmti.h>
#include "agent_common.hpp"
#include "JVMTITools.hpp"
extern "C" {
#define STATUS_FAILED 2
#define PASSED 0
static jvmtiEnv *jvmti = nullptr;
static jvmtiCapabilities caps;
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_redefclass006(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_redefclass006(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_redefclass006(JavaVM *jvm, char *options, void *reserved) {
return JNI_VERSION_1_8;
}
#endif
jint Agent_Initialize(JavaVM *vm, char *options, void *reserved) {
jint res;
jvmtiError err;
res = vm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
if (res != JNI_OK) {
printf("%s: Failed to call GetEnv: error=%d\n", __FILE__, res);
return JNI_ERR;
}
err = jvmti->GetPotentialCapabilities(&caps);
if (err != JVMTI_ERROR_NONE) {
printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
err = jvmti->AddCapabilities(&caps);
if (err != JVMTI_ERROR_NONE) {
printf("(AddCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
err = jvmti->GetCapabilities(&caps);
if (err != JVMTI_ERROR_NONE) {
printf("(GetCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
if (!caps.can_redefine_classes) {
printf("Warning: RedefineClasses is not implemented\n");
}
return JNI_OK;
}
JNIEXPORT jint JNICALL
Java_nsk_jvmti_RedefineClasses_redefclass006_makeRedefinition(JNIEnv *env,
jclass cls, jint t_case, jclass redefCls, jbyteArray classBytes) {
jvmtiError err;
jvmtiClassDefinition classDef;
jvmtiClassDefinition* classDefPtr = nullptr;
if (jvmti == nullptr) {
printf("JVMTI client was not properly loaded!\n");
return STATUS_FAILED;
}
if (!caps.can_redefine_classes) {
return PASSED;
}
switch (t_case) {
/* nullptr pointer to the jvmtiClassDefinition */
case 0:
break;
/* nullptr pointer to the jvmtiClassDefinition in debug mode */
case 1:
printf("Invoke RedefineClasses() with null pointer to the structure jvmtiClassDefinition\n");
fflush(stdout);
break;
/* nullptr pointer to the jvmtiClassDefinition->class_bytes in debug mode */
case 3:
printf("Invoke RedefineClasses() with null pointer to the field jvmtiClassDefinition->class_bytes\n");
fflush(stdout);
// fallthrough
/* nullptr pointer to the jvmtiClassDefinition->class_bytes */
case 2:
/* partly fill the structure jvmtiClassDefinition */
classDef.klass = redefCls;
classDef.class_byte_count = env->GetArrayLength(classBytes);
classDef.class_bytes = nullptr;
classDefPtr = &classDef;
break;
}
/* explode the bomb */
err = jvmti->RedefineClasses(1, classDefPtr);
if (err != JVMTI_ERROR_NULL_POINTER) {
printf("TEST FAILED: the function RedefineClasses() returned error %d: %s\n",
err, TranslateError(err));
printf("\tBut it should return the error JVMTI_ERROR_NULL_POINTER.\n");
return STATUS_FAILED;
}
return PASSED;
}
}
|
