1 /*
2 * Copyright (c) 2013, 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 #include <wchar.h>
24 #include <string.h>
25 #include <stdlib.h>
26
27 #include "jvmti.h"
28 #include "jni_tools.h"
29 #include "jvmti_tools.h"
30 #include "agent_common.h"
31
32 extern "C" {
33
34 static int timeout = 0;
35
36 jint JNICALL field_callback(jvmtiHeapReferenceKind kind,
37 const jvmtiHeapReferenceInfo* info,
38 jlong object_class_tag,
39 jlong* object_tag_ptr,
40 jvalue value,
41 jvmtiPrimitiveType value_type,
42 void* user_data) {
43 (*(int*)user_data)++;
44 return JVMTI_VISIT_ABORT;
45 }
46
47 jint JNICALL string_callback(jlong class_tag,
48 jlong size,
49 jlong* tag_ptr,
50 const jchar* value,
51 jint value_length,
52 void* user_data) {
53 (*(int*)user_data)++;
54 return JVMTI_VISIT_ABORT;
55 }
56
57 jint JNICALL array_callback(jlong class_tag,
58 jlong size,
59 jlong* tag_ptr,
60 jint element_count,
61 jvmtiPrimitiveType element_type,
62 const void* elements,
63 void* user_data) {
64 (*(int*)user_data)++;
65 return JVMTI_VISIT_ABORT;
66 }
67
68 jint JNICALL heap_callback(jlong class_tag,
69 jlong size,
70 jlong* tag_ptr,
71 jint length,
72 void* user_data) {
73 (*(int*)user_data)++;
74 return JVMTI_VISIT_ABORT;
75 }
76
77 static void JNICALL
78 agent(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) {
79 jvmtiEvent event = JVMTI_EVENT_OBJECT_FREE;
80 jvmtiHeapCallbacks primitive_callbacks;
81 int invocations = 0;
82
83 NSK_DISPLAY0("Waiting debugee.\n");
84 if(!NSK_VERIFY(nsk_jvmti_enableEvents(JVMTI_ENABLE, 1, &event, NULL))) {
85 return;
86 }
87 if(!NSK_VERIFY(nsk_jvmti_waitForSync(timeout))) {
88 return;
89 }
90
91 memset(&primitive_callbacks, 0, sizeof(jvmtiHeapCallbacks));
92 primitive_callbacks.primitive_field_callback = &field_callback;
93 primitive_callbacks.array_primitive_value_callback = &array_callback;
94 primitive_callbacks.string_primitive_value_callback = &string_callback;
95 primitive_callbacks.heap_iteration_callback = &heap_callback;
96
97 NSK_DISPLAY0("Iterating over reachable objects.\n");
98 if(!NSK_JVMTI_VERIFY(jvmti->IterateThroughHeap(0, NULL, &primitive_callbacks, &invocations))) {
99 nsk_jvmti_setFailStatus();
100 return;
101 }
102
103 if(invocations != 1) {
104 NSK_COMPLAIN1("Primitive callbacks were invoked more than once: "
105 "%d invocations registered.\n",invocations);
106 nsk_jvmti_setFailStatus();
107 }
108
109 if(!NSK_VERIFY(nsk_jvmti_resumeSync()))
110 return;
111 }
112
113 #ifdef STATIC_BUILD
114 JNIEXPORT jint JNICALL Agent_OnLoad_Abort(JavaVM *jvm, char *options, void *reserved) {
115 return Agent_Initialize(jvm, options, reserved);
116 }
117 JNIEXPORT jint JNICALL Agent_OnAttach_Abort(JavaVM *jvm, char *options, void *reserved) {
118 return Agent_Initialize(jvm, options, reserved);
119 }
120 JNIEXPORT jint JNI_OnLoad_Abort(JavaVM *jvm, char *options, void *reserved) {
121 return JNI_VERSION_1_8;
122 }
123 #endif
124 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
125 jvmtiEnv *jvmti;
126 jvmtiCapabilities caps;
127 jvmtiEventCallbacks event_callbacks;
128
129 if(!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL)) {
130 return JNI_ERR;
131 }
132
133 nsk_jvmti_parseOptions(options);
134
135 timeout = nsk_jvmti_getWaitTime() * 60 * 1000;
136
137 memset(&caps, 0, sizeof(caps));
138 caps.can_tag_objects = 1;
139 caps.can_generate_object_free_events = 1;
140
141 if(!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps))) {
142 return JNI_ERR;
143 }
144
145 memset(&event_callbacks, 0, sizeof(jvmtiEventCallbacks));
146 if(!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&event_callbacks, sizeof(jvmtiEventCallbacks)))) {
147 return JNI_ERR;
148 }
149
150 if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agent, NULL))) {
151 return JNI_ERR;
152 }
153
154 return JNI_OK;
155 }
156
157 }