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
|
/*
* Copyright (c) 2004, 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 <string.h>
#include "jvmti.h"
#include "agent_common.hpp"
#include "jni_tools.hpp"
#include "jvmti_tools.hpp"
extern "C" {
/* ============================================================================= */
static jlong timeout = 0;
static int fakeUserData = 0, objCounter = 0;
static jvmtiEnv* st_jvmti = nullptr;
static const char *storage_data = "local_storage_data";
static void *storage_ptr = nullptr;
static const char* debugeeClassSignature = "Lnsk/jvmti/IterateOverObjectsReachableFromObject/iterobjreachobj004;";
static const char* objectFieldName = "object";
/* ============================================================================= */
jvmtiIterationControl JNICALL
objectReferenceCallback(jvmtiObjectReferenceKind reference_kind,
jlong class_tag,
jlong size,
jlong* tag_ptr,
jlong referrer_tag,
jint referrer_index,
void* user_data) {
objCounter++;
if (!NSK_JVMTI_VERIFY(st_jvmti->SetEnvironmentLocalStorage(storage_data))) {
nsk_jvmti_setFailStatus();
}
if (!NSK_JVMTI_VERIFY(st_jvmti->GetEnvironmentLocalStorage(&storage_ptr))) {
nsk_jvmti_setFailStatus();
}
/* Iterate over only first object */
return JVMTI_ITERATION_ABORT;
}
/* ============================================================================= */
/** Agent algorithm. */
static void JNICALL
agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) {
NSK_DISPLAY0("Wait for debugee start\n");
if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout)))
return;
do {
jclass debugeeClass = nullptr;
jfieldID objectField = nullptr;
jobject object = nullptr;
NSK_DISPLAY1("Find debugee class: %s\n", debugeeClassSignature);
debugeeClass = nsk_jvmti_classBySignature(debugeeClassSignature);
if (debugeeClass == nullptr) {
nsk_jvmti_setFailStatus();
break;
}
NSK_DISPLAY1("Find static field in debugee class: %s\n", objectFieldName);
if (!NSK_JNI_VERIFY(jni, (objectField = jni->GetStaticFieldID(
debugeeClass, objectFieldName, debugeeClassSignature)) != nullptr)) {
nsk_jvmti_setFailStatus();
break;
}
NSK_DISPLAY1("Find value of static field in debugee class: %s\n", objectFieldName);
if (!NSK_JNI_VERIFY(jni, (object =
jni->GetStaticObjectField(debugeeClass, objectField)) != nullptr)) {
nsk_jvmti_setFailStatus();
break;
}
NSK_DISPLAY0("Calling IterateOverObjectsReachableFromObject with filter JVMTI_HEAP_OBJECT_EITHER\n");
{
if (!NSK_JVMTI_VERIFY(jvmti->IterateOverObjectsReachableFromObject(
object, objectReferenceCallback, &fakeUserData))) {
nsk_jvmti_setFailStatus();
}
}
if (objCounter == 0) {
NSK_COMPLAIN0("IterateOverObjectsReachableFromObject call had not visited any object\n");
nsk_jvmti_setFailStatus();
}
if (storage_data != storage_ptr) {
NSK_COMPLAIN2("Local storage address was corrupted: %p ,\n\texpected value: %p\n",
storage_ptr, storage_data);
nsk_jvmti_setFailStatus();
}
if (strcmp(storage_data, (char *)storage_ptr) != 0) {
NSK_COMPLAIN2("Local storage was corrupted: %s ,\n\texpected value: %s\n",
(char *)storage_ptr, storage_data);
nsk_jvmti_setFailStatus();
}
} while (0);
NSK_DISPLAY0("Let debugee to finish\n");
if (!NSK_VERIFY(nsk_jvmti_resumeSync()))
return;
}
/* ============================================================================= */
/** Agent library initialization. */
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_iterobjreachobj004(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_iterobjreachobj004(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_iterobjreachobj004(JavaVM *jvm, char *options, void *reserved) {
return JNI_VERSION_1_8;
}
#endif
jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
jvmtiEnv* jvmti = nullptr;
if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
return JNI_ERR;
timeout = nsk_jvmti_getWaitTime() * 60 * 1000;
if (!NSK_VERIFY((jvmti =
nsk_jvmti_createJVMTIEnv(jvm, reserved)) != nullptr))
return JNI_ERR;
/* save pointer to environment to use it in callbacks */
st_jvmti = jvmti;
{
jvmtiCapabilities caps;
memset(&caps, 0, sizeof(caps));
caps.can_tag_objects = 1;
if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps))) {
return JNI_ERR;
}
}
if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, nullptr)))
return JNI_ERR;
return JNI_OK;
}
/* ============================================================================= */
}
|
