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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/*
* 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"
extern "C" {
#define PASSED 0
#define STATUS_FAILED 2
static jvmtiEnv *jvmti;
static jint result = PASSED;
/*
* Class: nsk.jvmti.unit.extmech
* Method: isClassUnloadingEnabled
* Signature: ()Z
*/
JNIEXPORT jboolean JNICALL
Java_nsk_jvmti_unit_extmech_isClassUnloadingEnabled
(JNIEnv *env, jclass cls)
{
jint count, i;
jvmtiExtensionFunctionInfo* ext_funcs;
jvmtiError err;
err = jvmti->GetExtensionFunctions(&count, &ext_funcs);
if (err != JVMTI_ERROR_NONE) {
fprintf(stderr, "GetExtensionFunctions failed: %d\n", err);
result = STATUS_FAILED;
return JNI_FALSE;
}
for (i=0; i<count; i++) {
if (strcmp(ext_funcs[i].id, (char*)"com.sun.hotspot.functions.IsClassUnloadingEnabled") == 0) {
jboolean enabled;
err = (*ext_funcs[i].func)(jvmti, &enabled);
if (err != JVMTI_ERROR_NONE) {
fprintf(stderr, "IsClassUnloadingEnabled failed: %d\n", err);
result = STATUS_FAILED;
return JNI_FALSE;
} else {
return enabled;
}
}
}
return JNI_FALSE;
}
static void JNICALL
ClassUnload(jvmtiEnv* jvmti_env, JNIEnv *jni_env, jthread thread, jclass cls) {
}
/*
* Class: nsk.jvmti.unit.extmech
* Method: enableClassUnloadEvent
* Signature: (Z)V
*/
JNIEXPORT void JNICALL
Java_nsk_jvmti_unit_extmech_enableClassUnloadEvent
(JNIEnv *env, jclass cls, jboolean enable)
{
jint count, i;
jvmtiExtensionEventInfo* ext_events;
jvmtiError err;
err = jvmti->GetExtensionEvents(&count, &ext_events);
if (err != JVMTI_ERROR_NONE) {
fprintf(stderr, "GetExtensionEvents failed: %d\n", err);
result = STATUS_FAILED;
return;
}
for (i=0; i<count; i++) {
if (strcmp(ext_events[i].id, (char*)"com.sun.hotspot.events.ClassUnload") == 0) {
err = jvmti->SetExtensionEventCallback(ext_events[i].extension_event_index,
enable ? (jvmtiExtensionEvent)ClassUnload : nullptr);
if (err != JVMTI_ERROR_NONE) {
fprintf(stderr, "SetExtenionEventCallback failed: %d\n", err);
result = STATUS_FAILED;
} else {
char* id = ext_events[i].id;
if (enable) {
fprintf(stderr, "%s callback enabled\n", id);
} else {
fprintf(stderr, "%s callback disabled\n", id);
}
}
return;
}
}
}
/*
* Class: nsk.jvmti.unit.extmech
* Method: dumpExtensions
* Signature: ()V
*/
JNIEXPORT void JNICALL
Java_nsk_jvmti_unit_extmech_dumpExtensions
(JNIEnv *env, jclass cls)
{
jint count, i, j;
jvmtiExtensionFunctionInfo* ext_funcs;
jvmtiExtensionEventInfo* ext_events;
jvmtiError err;
err = jvmti->GetExtensionFunctions(&count, &ext_funcs);
if (err != JVMTI_ERROR_NONE) {
fprintf(stderr, "GetExtensionFunctions failed: %d\n", err);
result = STATUS_FAILED;
return;
}
fprintf(stderr, "Extension functions:\n");
for (i=0; i<count; i++) {
jvmtiParamInfo* params = ext_funcs[i].params;
jvmtiError* errors = ext_funcs[i].errors;
fprintf(stderr, "%s (%s)\n", ext_funcs[i].id, ext_funcs[i].short_description);
fprintf(stderr, " Parameters:\n");
for (j=0; j<ext_funcs[i].param_count; j++) {
fprintf(stderr, " %s type:%d\n", params[j].name, params[j].base_type);
}
fprintf(stderr, " Errors:\n");
for (j=0; j<ext_funcs[i].error_count; j++) {
fprintf(stderr, " %d\n", errors[j]);
}
}
/* --- */
err = jvmti->GetExtensionEvents(&count, &ext_events);
if (err != JVMTI_ERROR_NONE) {
fprintf(stderr, "GetExtensionEvents failed: %d\n", err);
result = STATUS_FAILED;
return;
}
fprintf(stderr, "Extension events:\n");
for (i=0; i<count; i++) {
jvmtiParamInfo* params = ext_events[i].params;
fprintf(stderr, "event: %d, %s (%s)\n",
ext_events[i].extension_event_index,
ext_events[i].id, ext_events[i].short_description);
fprintf(stderr, " Parameters:\n");
for (j=0; j<ext_events[i].param_count; j++) {
fprintf(stderr, " %s type:%d\n", params[j].name, params[j].base_type);
}
}
}
/*
* Class: nsk.jvmti.unit.extmech
* Method: getResult
* Signature: ()I
*/
JNIEXPORT jint JNICALL
Java_nsk_jvmti_unit_extmech_getResult
(JNIEnv *env, jclass cls)
{
return result;
}
/*
* JVM_OnLoad - add capabilities and enables OBJECT_FREE event
*/
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_extmech(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_extmech(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_extmech(JavaVM *jvm, char *options, void *reserved) {
return JNI_VERSION_1_8;
}
#endif
jint Agent_Initialize(JavaVM *vm, char *options, void *reserved)
{
jint rc;
/* get JVMTI environment */
rc = vm->GetEnv((void **)&jvmti, JVMTI_VERSION_1_1);
if (rc != JNI_OK) {
fprintf(stderr, "Unable to create jvmtiEnv, GetEnv failed, error=%d\n", rc);
return JNI_ERR;
}
return JNI_OK;
}
}
|
