1 /*
2 * Copyright (c) 2007, 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 <string.h>
25 #include <jvmti.h>
26 #include "agent_common.h"
27 #include "jni_tools.h"
28 #include "jvmti_tools.h"
29 #include "jvmti_FollowRefObjects.h"
30
31 extern "C" {
32
33 /* ============================================================================= */
34
35 static jlong g_timeout = 0;
36
37 #define JAVA_LANG_STRING_CLASS_NAME "java/lang/String"
38 #define JAVA_IO_SERIALIZABLE_CLASS_NAME "java/io/Serializable"
39 #define JAVA_UTIL_CALENDAR_CLASS_NAME "java/util/Calendar"
40
41 static jobject g_jniGlobalRef = 0;
42 static jweak g_jniWeakGlobalRef = 0;
43
44 static jvmtiHeapCallbacks g_heapCallbacks;
45
46 /* ============================================================================= */
47
48 jint JNICALL heapReferenceCallback(
49 jvmtiHeapReferenceKind reference_kind,
50 const jvmtiHeapReferenceInfo* reference_info,
51 jlong class_tag,
52 jlong referrer_class_tag,
53 jlong size,
54 jlong* tag_ptr,
55 jlong* referrer_tag_ptr,
56 jint length,
57 void* user_data)
58 {
59 CHECK_USER_DATA(user_data);
60
61 printHeapRefCallbackInfo(reference_kind, reference_info, class_tag, referrer_class_tag, size, tag_ptr, referrer_tag_ptr, length);
62
63 markTagVisited(DEREF(tag_ptr));
64 markRefToVerify(DEREF(referrer_tag_ptr), DEREF(tag_ptr), reference_kind);
65
66 return JVMTI_VISIT_OBJECTS;
67
68 } /* heapReferenceCallback */
69
70
71 jint JNICALL primitiveFieldCallback(
72 jvmtiHeapReferenceKind reference_kind,
73 const jvmtiHeapReferenceInfo* reference_info,
74 jlong class_tag,
75 jlong* tag_ptr,
76 jvalue value,
77 jvmtiPrimitiveType value_type,
78 void* user_data)
79 {
80 CHECK_USER_DATA(user_data);
81
82 printf(" primitiveFieldCallback: ref=%s,"
83 " class_tag=%-3ld, tag=%-3ld, type=%c\n",
84 g_refKindStr[reference_kind],
85 (long) class_tag,
86 (long) DEREF(tag_ptr),
87 (int ) value_type);
88
89 fflush(0);
90
91 markTagVisited(DEREF(tag_ptr));
92
93 return JVMTI_VISIT_OBJECTS;
94
95 } /* primitiveFieldCallback */
96
97
98 jint JNICALL arrayPrimitiveValueCallback(
99 jlong class_tag,
100 jlong size,
101 jlong* tag_ptr,
102 jint element_count,
103 jvmtiPrimitiveType element_type,
104 const void* elements,
105 void* user_data)
106 {
107 CHECK_USER_DATA(user_data);
108
109 printf(" arrayPrimitiveValueCallback: class_tag=%-3ld, tag=%-3ld, len=%d, type=%c\n",
110 (long) class_tag,
111 (long) DEREF(tag_ptr),
112 (int ) element_count,
113 (int ) element_type);
114 fflush(0);
115
116 markTagVisited(DEREF(tag_ptr));
117
118 return JVMTI_VISIT_OBJECTS;
119
120 } /* arrayPrimitiveValueCallback */
121
122
123 jint JNICALL stringPrimitiveValueCallback(
124 jlong class_tag,
125 jlong size,
126 jlong* tag_ptr,
127 const jchar* value,
128 jint value_length,
129 void* user_data)
130 {
131 printf("stringPrimitiveValueCallback: class_tag=%-3ld, tag=%-3ld, len=%d\n",
132 (long) class_tag,
133 (long) DEREF(tag_ptr),
134 (int ) value_length);
135 fflush(0);
136
137 markTagVisited(DEREF(tag_ptr));
138
139 return JVMTI_VISIT_OBJECTS;
140
141 } /* stringPrimitiveValueCallback */
142
143 /* ============================================================================= */
144
145 static void createGlobalRefs(JNIEnv * jni)
146 {
147 jclass klass;
148
149 if ( ! NSK_JNI_VERIFY(jni, (klass = jni->FindClass(JAVA_LANG_STRING_CLASS_NAME)) != NULL) ) {
150 nsk_jvmti_setFailStatus();
151 return;
152 }
153
154 if ( ! NSK_JNI_VERIFY(jni, (g_jniGlobalRef = jni->NewGlobalRef(klass)) != NULL) ) {
155 nsk_jvmti_setFailStatus();
156 }
157
158 if ( ! NSK_JNI_VERIFY(jni, (g_jniWeakGlobalRef = jni->NewWeakGlobalRef(klass)) != NULL) ) {
159 nsk_jvmti_setFailStatus();
160 }
161
162 } /* createGlobalRefs */
163
164 /** Agent algorithm. */
165
166 static void JNICALL agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg)
167 {
168 jvmtiError retCode;
169
170 printf(">>> Sync with Java code\n");
171 fflush(0);
172
173 if (!NSK_VERIFY(nsk_jvmti_waitForSync(g_timeout))) {
174 return;
175 }
176
177 printf(">>> Create JNI global references\n");
178 fflush(0);
179
180 createGlobalRefs(jni);
181
182 retCode = jvmti->FollowReferences((jint) 0, /* heap filter */
183 NULL, /* class */
184 NULL, /* inital object */
185 &g_heapCallbacks,
186 (const void *) &g_fakeUserData);
187
188 if ( ! NSK_VERIFY(retCode == JVMTI_ERROR_NONE) ) {
189 nsk_jvmti_setFailStatus();
190 }
191
192 checkThatAllTagsVisited();
193
194 printf(">>> Let debugee to finish\n");
195 fflush(0);
196
197 if (!NSK_VERIFY(nsk_jvmti_resumeSync())) {
198 return;
199 }
200
201 } /* agentProc */
202
203
204 /* ============================================================================= */
205
206 /** Agent library initialization. */
207
208 #ifdef STATIC_BUILD
209 JNIEXPORT jint JNICALL Agent_OnLoad_followref004(JavaVM *jvm, char *options, void *reserved) {
210 return Agent_Initialize(jvm, options, reserved);
211 }
212 JNIEXPORT jint JNICALL Agent_OnAttach_followref004(JavaVM *jvm, char *options, void *reserved) {
213 return Agent_Initialize(jvm, options, reserved);
214 }
215 JNIEXPORT jint JNI_OnLoad_followref004(JavaVM *jvm, char *options, void *reserved) {
216 return JNI_VERSION_1_8;
217 }
218 #endif
219 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved)
220 {
221 jvmtiEnv* jvmti = NULL;
222
223 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options))) {
224 return JNI_ERR;
225 }
226
227 g_timeout = nsk_jvmti_getWaitTime() * 60 * 1000;
228
229 if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL)) {
230 return JNI_ERR;
231 }
232
233 /* Setting Heap Callbacks */
234 memset(&g_heapCallbacks, 0, sizeof(g_heapCallbacks));
235 g_heapCallbacks.heap_iteration_callback = NULL;
236 g_heapCallbacks.heap_reference_callback = heapReferenceCallback;
237 g_heapCallbacks.primitive_field_callback = primitiveFieldCallback;
238 g_heapCallbacks.array_primitive_value_callback = arrayPrimitiveValueCallback;
239 g_heapCallbacks.string_primitive_value_callback = stringPrimitiveValueCallback;
240
241 jvmti_FollowRefObject_init();
242
243 {
244 jvmtiCapabilities caps;
245
246 memset(&caps, 0, sizeof(caps));
247 caps.can_tag_objects = 1;
248 if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps))) {
249 return JNI_ERR;
250 }
251 }
252
253 if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL))) {
254 return JNI_ERR;
255 }
256
257 return JNI_OK;
258
259 } /* Agent_OnLoad */
260
261
262 /* ============================================================================= */
263
264 }