1 /*
2 * Copyright (c) 2004, 2018, 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
24 #include <stdio.h>
25 #include <string.h>
26 #include <jvmti.h>
27 #include "agent_common.h"
28
29 #include "nsk_tools.h"
30 #include "jni_tools.h"
31 #include "JVMTITools.h"
32 #include "jvmti_tools.h"
33
34 extern "C" {
35
36 #define EXP_OBJ_NUMBER 1
37
38 static JNIEnv *jni = NULL;
39 static jvmtiEnv *jvmti = NULL;
40 static jvmtiEventCallbacks callbacks;
41 static jvmtiCapabilities caps;
42
43 static volatile int obj_free = 0;
44 static volatile long obj_count = 0;
45
46 static jlong timeout = 0;
47 static int user_data = 0;
48 static const char* DEBUGEE_SIGNATURE = "Lnsk/jvmti/scenarios/allocation/AP03/ap03t001;";
49 static const jlong DEBUGEE_CLASS_TAG = (jlong)1024;
50
51 void JNICALL
52 ObjectFree(jvmtiEnv *jvmti_env, jlong tag) {
53 NSK_COMPLAIN1("Received unexpected ObjectFree event for an object with tag %ld\n\n", (long)tag);
54 nsk_jvmti_setFailStatus();
55 obj_free++;
56 }
57
58 jvmtiIterationControl JNICALL
59 heapObjectCallback(jlong class_tag,
60 jlong size,
61 jlong* tag_ptr,
62 void* user_data) {
63
64 if (class_tag == DEBUGEE_CLASS_TAG) {
65 obj_count++;
66 }
67
68 return JVMTI_ITERATION_CONTINUE;
69 }
70
71 jvmtiIterationControl JNICALL
72 objectReferenceCallback(jvmtiObjectReferenceKind reference_kind,
73 jlong class_tag,
74 jlong size,
75 jlong* tag_ptr,
76 jlong referrer_tag,
77 jint referrer_index,
78 void* user_data) {
79
80 if (class_tag == DEBUGEE_CLASS_TAG && *tag_ptr != 0) {
81 obj_count++;
82 }
83
84 return JVMTI_ITERATION_CONTINUE;
85 }
86
87
88 /************************/
89
90 JNIEXPORT void JNICALL
91 Java_nsk_jvmti_scenarios_allocation_AP03_ap03t001_setTag(JNIEnv* jni, jobject obj, jlong tag) {
92
93 if (!NSK_JVMTI_VERIFY(jvmti->SetTag(obj, tag))) {
94 nsk_jvmti_setFailStatus();
95 }
96 }
97
98 static void JNICALL
99 agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) {
100
101 jclass debugeeClass = NULL;
102
103 NSK_DISPLAY0("Wait for debugee start\n\n");
104 if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout)))
105 return;
106
107 do {
108 jobject catcher;
109 jfieldID fid;
110
111 NSK_DISPLAY1("Find debugee class: %s\n", DEBUGEE_SIGNATURE);
112 debugeeClass = nsk_jvmti_classBySignature(DEBUGEE_SIGNATURE);
113 if (debugeeClass == NULL) {
114 nsk_jvmti_setFailStatus();
115 break;
116 }
117
118 NSK_DISPLAY0("Set tag for debugee class\n\n");
119 if (!NSK_JVMTI_VERIFY(jvmti->SetTag(debugeeClass, DEBUGEE_CLASS_TAG))) {
120 nsk_jvmti_setFailStatus();
121 break;
122 }
123
124 NSK_DISPLAY0("Calling IterateOverInstancesOfClass with filter JVMTI_HEAP_OBJECT_TAGGED\n");
125 obj_count = 0;
126 if (!NSK_JVMTI_VERIFY(jvmti->IterateOverInstancesOfClass(debugeeClass,
127 JVMTI_HEAP_OBJECT_TAGGED,
128 heapObjectCallback,
129 &user_data))) {
130 nsk_jvmti_setFailStatus();
131 break;
132 }
133
134 if (obj_count != EXP_OBJ_NUMBER) {
135 nsk_jvmti_setFailStatus();
136 NSK_COMPLAIN2(
137 "IterateOverInstancesOfClass found unexpected number of objects: %d\n"
138 "\texpected number: %d\n\n",
139 obj_count, EXP_OBJ_NUMBER);
140 } else {
141 NSK_DISPLAY1("Number of objects IterateOverInstancesOfClass has found: %d\n\n", obj_count);
142 }
143
144 NSK_DISPLAY0("Calling IterateOverHeap with filter JVMTI_HEAP_OBJECT_TAGGED\n");
145 obj_count = 0;
146 if (!NSK_JVMTI_VERIFY(
147 jvmti->IterateOverHeap(JVMTI_HEAP_OBJECT_TAGGED, heapObjectCallback, &user_data))) {
148 nsk_jvmti_setFailStatus();
149 break;
150 }
151
152 if (obj_count != EXP_OBJ_NUMBER) {
153 nsk_jvmti_setFailStatus();
154 NSK_COMPLAIN2(
155 "IterateOverHeap found unexpected number of objects: %d\n"
156 "\texpected number: %d\n\n",
157 obj_count, EXP_OBJ_NUMBER);
158 } else {
159 NSK_DISPLAY1("Number of objects IterateOverHeap has found: %d\n\n", obj_count);
160 }
161
162 if (!NSK_JNI_VERIFY(jni, (fid =
163 jni->GetStaticFieldID(debugeeClass, "catcher", DEBUGEE_SIGNATURE)) != NULL)) {
164 nsk_jvmti_setFailStatus();
165 break;
166 }
167
168 if (!NSK_JNI_VERIFY(jni, (catcher =
169 jni->GetStaticObjectField(debugeeClass, fid)) != NULL)) {
170 NSK_COMPLAIN0("GetStaticObjectField returned NULL for 'catcher' field value\n\n");
171 nsk_jvmti_setFailStatus();
172 break;
173 }
174
175 NSK_DISPLAY0("Calling IterateOverObjectsReachableFromObject\n");
176 obj_count = 0;
177 if (!NSK_JVMTI_VERIFY(jvmti->IterateOverObjectsReachableFromObject(catcher,
178 objectReferenceCallback,
179 &user_data))) {
180 nsk_jvmti_setFailStatus();
181 break;
182 }
183
184 if (obj_count != EXP_OBJ_NUMBER) {
185 nsk_jvmti_setFailStatus();
186 NSK_COMPLAIN2(
187 "IterateOverObjectsReachableFromObject found unexpected number of objects: %d\n"
188 "\texpected number: %d\n\n",
189 obj_count, EXP_OBJ_NUMBER);
190 } else {
191 NSK_DISPLAY1("Number of objects IterateOverObjectsReachableFromObject has found: %d\n\n", obj_count);
192 }
193 } while (0);
194
195 NSK_DISPLAY0("Let debugee to finish\n");
196 if (!NSK_VERIFY(nsk_jvmti_resumeSync()))
197 return;
198 }
199
200 #ifdef STATIC_BUILD
201 JNIEXPORT jint JNICALL Agent_OnLoad_ap03t001(JavaVM *jvm, char *options, void *reserved) {
202 return Agent_Initialize(jvm, options, reserved);
203 }
204 JNIEXPORT jint JNICALL Agent_OnAttach_ap03t001(JavaVM *jvm, char *options, void *reserved) {
205 return Agent_Initialize(jvm, options, reserved);
206 }
207 JNIEXPORT jint JNI_OnLoad_ap03t001(JavaVM *jvm, char *options, void *reserved) {
208 return JNI_VERSION_1_8;
209 }
210 #endif
211 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
212 /* init framework and parse options */
213 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
214 return JNI_ERR;
215
216 /* create JVMTI environment */
217 if (!NSK_VERIFY((jvmti =
218 nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
219 return JNI_ERR;
220
221 memset(&caps, 0, sizeof(jvmtiCapabilities));
222 caps.can_generate_object_free_events = 1;
223 caps.can_tag_objects = 1;
224 if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps)))
225 return JNI_ERR;
226
227 if (!NSK_JVMTI_VERIFY(jvmti->GetCapabilities(&caps)))
228 return JNI_ERR;
229
230 if (!caps.can_generate_object_free_events)
231 NSK_DISPLAY0("Warning: generation of object free events is not implemented\n");
232 if (!caps.can_tag_objects)
233 NSK_DISPLAY0("Warning: tagging objects is not implemented\n");
234
235 /* set event callback */
236 NSK_DISPLAY0("setting event callbacks ...\n");
237 (void) memset(&callbacks, 0, sizeof(callbacks));
238
239 callbacks.ObjectFree = &ObjectFree;
240
241 if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks))))
242 return JNI_ERR;
243
244 NSK_DISPLAY0("setting event callbacks done\nenabling JVMTI events ...\n");
245 if (!NSK_JVMTI_VERIFY(jvmti->SetEventNotificationMode(JVMTI_ENABLE,
246 JVMTI_EVENT_OBJECT_FREE,
247 NULL)))
248 return JNI_ERR;
249 NSK_DISPLAY0("enabling the events done\n\n");
250
251 if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))
252 return JNI_ERR;
253 NSK_DISPLAY0("agentProc has been set\n\n");
254
255 return JNI_OK;
256 }
257
258 }