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
|
/*
* 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 PASSED 0
#define STATUS_FAILED 2
static JavaVM *jvm_ins;
static jvmtiEnv *jvmti = nullptr;
static jvmtiEventCallbacks callbacks;
static jint result = PASSED;
static jboolean printdump = JNI_FALSE;
static jboolean agent_was_started = JNI_FALSE;
static jboolean done = JNI_FALSE;
jthread jthr(JNIEnv *env) {
jclass thrClass;
jmethodID cid;
jthread res;
thrClass = env->FindClass("java/lang/Thread");
cid = env->GetMethodID(thrClass, "<init>", "()V");
res = env->NewObject(thrClass, cid);
return res;
}
void JNICALL agent_start(jvmtiEnv* jvmti_env, JNIEnv* jni_env, void *p) {
JNIEnv *env;
if (jvmti_env != jvmti) {
printf("(agent_start) JVMTI envs don't match\n");
result = STATUS_FAILED;
}
jvm_ins->GetEnv((void **) &env, JNI_VERSION_1_2);
if (jni_env != env) {
printf("(agent_start) JNI envs don't match\n");
result = STATUS_FAILED;
}
if ((size_t)p != 12345) {
printf("(agent_start) args don't match\n");
result = STATUS_FAILED;
}
done = JNI_TRUE;
}
void JNICALL vm_init(jvmtiEnv* jvmti_env, JNIEnv *env, jthread thread) {
jvmtiError err;
if (!agent_was_started) {
agent_was_started = JNI_TRUE;
err = jvmti->RunAgentThread(jthr(env), agent_start,
(void *)999, JVMTI_THREAD_MAX_PRIORITY+1);
if (err != JVMTI_ERROR_INVALID_PRIORITY) {
printf("(RunAgentThread#1) expected JVMTI_ERROR_INVALID_PRIORITY got error: %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
err = jvmti->RunAgentThread(jthr(env), agent_start,
(void *)999, JVMTI_THREAD_MIN_PRIORITY-1);
if (err != JVMTI_ERROR_INVALID_PRIORITY) {
printf("(RunAgentThread#1) expected JVMTI_ERROR_INVALID_PRIORITY got error: %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
err = jvmti->RunAgentThread(jthr(env), agent_start,
(void *)12345, JVMTI_THREAD_NORM_PRIORITY);
if (err != JVMTI_ERROR_NONE) {
printf("(RunAgentThread#2) unexpected error: %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
}
}
}
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_agentthr(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_agentthr(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_agentthr(JavaVM *jvm, char *options, void *reserved) {
return JNI_VERSION_1_8;
}
#endif
jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
jvmtiError err;
jint res;
if (options != nullptr && strcmp(options, "printdump") == 0) {
printdump = JNI_TRUE;
}
jvm_ins = jvm;
res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
if (res != JNI_OK || jvmti == nullptr) {
printf("Wrong result of a valid call to GetEnv!\n");
return JNI_ERR;
}
callbacks.VMInit = &vm_init;
err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
if (err != JVMTI_ERROR_NONE) {
printf("(SetEventCallbacks) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
err = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_VM_INIT, nullptr);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to enable JVMTI_EVENT_THREAD_START: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
return JNI_OK;
}
JNIEXPORT jboolean JNICALL
Java_nsk_jvmti_unit_agentthr_isOver(JNIEnv *env, jclass cls) {
return done;
}
JNIEXPORT jint JNICALL
Java_nsk_jvmti_unit_agentthr_getRes(JNIEnv *env, jclass cls) {
if (!done) {
printf("agent thread has not completed\n");
result = STATUS_FAILED;
}
return result;
}
}
|
