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 <stdlib.h>
25 #include <string.h>
26 #include "jni_tools.h"
27 #include "agent_common.h"
28 #include "jvmti_tools.h"
29
30 #define PASSED 0
31 #define STATUS_FAILED 2
32
33 extern "C" {
34
35 /* ========================================================================== */
36
37 /* scaffold objects */
38 static jlong timeout = 0;
39
40 /* test objects */
41 static jthread thread = NULL;
42
43 /* event counts */
44 static int MethodEntryEventsCount = 0;
45
46 /* ========================================================================== */
47
48 /** callback functions **/
49
50 static void JNICALL
51 MethodEntry(jvmtiEnv *jvmti_env, JNIEnv *jni_env,
52 jthread thread, jmethodID method) {
53 char *name = NULL;
54 char *signature = NULL;
55
56 MethodEntryEventsCount++;
57 if (!NSK_JVMTI_VERIFY(jvmti_env->GetMethodName(method, &name, &signature, NULL))) {
58 nsk_jvmti_setFailStatus();
59 return;
60 }
61 NSK_DISPLAY2("MethodEntry event: %s%s\n", name, signature);
62 if (name != NULL)
63 jvmti_env->Deallocate((unsigned char*)name);
64 if (signature != NULL)
65 jvmti_env->Deallocate((unsigned char*)signature);
66 }
67
68 /* ========================================================================== */
69
70 static int prepare(jvmtiEnv* jvmti, JNIEnv* jni) {
71 const char* THREAD_NAME = "Debuggee Thread";
72 jvmtiThreadInfo info;
73 jthread *threads = NULL;
74 jint threads_count = 0;
75 int i;
76
77 NSK_DISPLAY0("Prepare: find tested thread\n");
78
79 /* get all live threads */
80 if (!NSK_JVMTI_VERIFY(jvmti->GetAllThreads(&threads_count, &threads)))
81 return NSK_FALSE;
82
83 if (!NSK_VERIFY(threads_count > 0 && threads != NULL))
84 return NSK_FALSE;
85
86 /* find tested thread */
87 for (i = 0; i < threads_count; i++) {
88 if (!NSK_VERIFY(threads[i] != NULL))
89 return NSK_FALSE;
90
91 /* get thread information */
92 if (!NSK_JVMTI_VERIFY(jvmti->GetThreadInfo(threads[i], &info)))
93 return NSK_FALSE;
94
95 NSK_DISPLAY3(" thread #%d (%s): %p\n", i, info.name, threads[i]);
96
97 /* find by name */
98 if (info.name != NULL && (strcmp(info.name, THREAD_NAME) == 0)) {
99 thread = threads[i];
100 }
101 }
102
103 if (!NSK_JNI_VERIFY(jni, (thread = jni->NewGlobalRef(thread)) != NULL))
104 return NSK_FALSE;
105
106 /* deallocate threads list */
107 if (!NSK_JVMTI_VERIFY(jvmti->Deallocate((unsigned char*)threads)))
108 return NSK_FALSE;
109
110 return NSK_TRUE;
111 }
112
113 /* ========================================================================== */
114
115 /** Agent algorithm. */
116 static void JNICALL
117 agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) {
118
119 if (!nsk_jvmti_waitForSync(timeout))
120 return;
121
122 if (!prepare(jvmti, jni)) {
123 nsk_jvmti_setFailStatus();
124 return;
125 }
126
127 if (!NSK_JVMTI_VERIFY(jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_METHOD_ENTRY, thread)))
128 nsk_jvmti_setFailStatus();
129
130 /* resume debugee and wait for sync */
131 if (!nsk_jvmti_resumeSync())
132 return;
133 if (!nsk_jvmti_waitForSync(timeout))
134 return;
135
136 NSK_DISPLAY1("MethodEntry events received: %d\n",
137 MethodEntryEventsCount);
138 if (!NSK_VERIFY(MethodEntryEventsCount != 0))
139 nsk_jvmti_setFailStatus();
140
141 NSK_TRACE(jni->DeleteGlobalRef(thread));
142
143 if (!nsk_jvmti_resumeSync())
144 return;
145 }
146
147 /* ========================================================================== */
148
149 /** Agent library initialization. */
150 #ifdef STATIC_BUILD
151 JNIEXPORT jint JNICALL Agent_OnLoad_ma10t002(JavaVM *jvm, char *options, void *reserved) {
152 return Agent_Initialize(jvm, options, reserved);
153 }
154 JNIEXPORT jint JNICALL Agent_OnAttach_ma10t002(JavaVM *jvm, char *options, void *reserved) {
155 return Agent_Initialize(jvm, options, reserved);
156 }
157 JNIEXPORT jint JNI_OnLoad_ma10t002(JavaVM *jvm, char *options, void *reserved) {
158 return JNI_VERSION_1_8;
159 }
160 #endif
161 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
162 jvmtiEnv* jvmti = NULL;
163 jvmtiCapabilities caps;
164 jvmtiEventCallbacks callbacks;
165
166 NSK_DISPLAY0("Agent_OnLoad\n");
167
168 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
169 return JNI_ERR;
170
171 timeout = nsk_jvmti_getWaitTime() * 60 * 1000;
172
173 if (!NSK_VERIFY((jvmti =
174 nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
175 return JNI_ERR;
176
177 if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))
178 return JNI_ERR;
179
180 memset(&caps, 0, sizeof(caps));
181 caps.can_generate_method_entry_events = 1;
182 if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps))) {
183 return JNI_ERR;
184 }
185
186 memset(&callbacks, 0, sizeof(callbacks));
187 callbacks.MethodEntry = &MethodEntry;
188 if (!NSK_VERIFY(nsk_jvmti_init_MA(&callbacks)))
189 return JNI_ERR;
190
191 return JNI_OK;
192 }
193
194 /* ========================================================================== */
195
196 }