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 SingleStepEventsCount = 0;
45
46 /* ========================================================================== */
47
48 /** callback functions **/
49
50 static void JNICALL
51 SingleStep(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,
52 jmethodID method, jlocation location) {
53 char *name = NULL;
54 char *signature = NULL;
55 char buffer[32];
56
57 SingleStepEventsCount++;
58
59 NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode,
60 jvmti_env, JVMTI_DISABLE, JVMTI_EVENT_SINGLE_STEP, NULL));
61
62 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB5(GetMethodName,
63 jvmti_env, method, &name, &signature, NULL))) {
64 nsk_jvmti_setFailStatus();
65 return;
66 }
67 NSK_DISPLAY3("SingleStep event: %s%s, location=%s\n", name, signature,
68 jlong_to_string(location, buffer));
69 if (name != NULL)
70 NSK_CPP_STUB2(Deallocate, jvmti_env, (unsigned char*)name);
71 if (signature != NULL)
72 NSK_CPP_STUB2(Deallocate, jvmti_env, (unsigned char*)signature);
73 }
74
75 /* ========================================================================== */
76
77 static int prepare(jvmtiEnv* jvmti, JNIEnv* jni) {
78 const char* THREAD_NAME = "Debuggee Thread";
79 jvmtiThreadInfo info;
80 jthread *threads = NULL;
81 jint threads_count = 0;
82 int i;
83
84 NSK_DISPLAY0("Prepare: find tested thread\n");
85
86 /* get all live threads */
87 if (!NSK_JVMTI_VERIFY(
88 NSK_CPP_STUB3(GetAllThreads, jvmti, &threads_count, &threads)))
89 return NSK_FALSE;
90
91 if (!NSK_VERIFY(threads_count > 0 && threads != NULL))
92 return NSK_FALSE;
93
94 /* find tested thread */
95 for (i = 0; i < threads_count; i++) {
96 if (!NSK_VERIFY(threads[i] != NULL))
97 return NSK_FALSE;
98
99 /* get thread information */
100 if (!NSK_JVMTI_VERIFY(
101 NSK_CPP_STUB3(GetThreadInfo, jvmti, threads[i], &info)))
102 return NSK_FALSE;
103
104 NSK_DISPLAY3(" thread #%d (%s): %p\n", i, info.name, threads[i]);
105
106 /* find by name */
107 if (info.name != NULL && (strcmp(info.name, THREAD_NAME) == 0)) {
108 thread = threads[i];
109 }
110 }
111
112 if (!NSK_JNI_VERIFY(jni, (thread =
113 NSK_CPP_STUB2(NewGlobalRef, jni, thread)) != NULL))
114 return NSK_FALSE;
115
116 /* deallocate threads list */
117 if (!NSK_JVMTI_VERIFY(
118 NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)threads)))
119 return NSK_FALSE;
120
121 return NSK_TRUE;
122 }
123
124 /* ========================================================================== */
125
126 /** Agent algorithm. */
127 static void JNICALL
128 agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) {
129
130 if (!nsk_jvmti_waitForSync(timeout))
131 return;
132
133 if (!prepare(jvmti, jni)) {
134 nsk_jvmti_setFailStatus();
135 return;
136 }
137
138 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode,
139 jvmti, JVMTI_ENABLE, JVMTI_EVENT_SINGLE_STEP, thread)))
140 nsk_jvmti_setFailStatus();
141
142 /* resume debugee and wait for sync */
143 if (!nsk_jvmti_resumeSync())
144 return;
145 if (!nsk_jvmti_waitForSync(timeout))
146 return;
147
148 NSK_DISPLAY1("SingleStep events received: %d\n",
149 SingleStepEventsCount);
150 if (!NSK_VERIFY(SingleStepEventsCount != 0))
151 nsk_jvmti_setFailStatus();
152
153 NSK_TRACE(NSK_CPP_STUB2(DeleteGlobalRef, jni, thread));
154
155 if (!nsk_jvmti_resumeSync())
156 return;
157 }
158
159 /* ========================================================================== */
160
161 /** Agent library initialization. */
162 #ifdef STATIC_BUILD
163 JNIEXPORT jint JNICALL Agent_OnLoad_ma10t004(JavaVM *jvm, char *options, void *reserved) {
164 return Agent_Initialize(jvm, options, reserved);
165 }
166 JNIEXPORT jint JNICALL Agent_OnAttach_ma10t004(JavaVM *jvm, char *options, void *reserved) {
167 return Agent_Initialize(jvm, options, reserved);
168 }
169 JNIEXPORT jint JNI_OnLoad_ma10t004(JavaVM *jvm, char *options, void *reserved) {
170 return JNI_VERSION_1_8;
171 }
172 #endif
173 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
174 jvmtiEnv* jvmti = NULL;
175 jvmtiCapabilities caps;
176 jvmtiEventCallbacks callbacks;
177
178 NSK_DISPLAY0("Agent_OnLoad\n");
179
180 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
181 return JNI_ERR;
182
183 timeout = nsk_jvmti_getWaitTime() * 60 * 1000;
184
185 if (!NSK_VERIFY((jvmti =
186 nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
187 return JNI_ERR;
188
189 if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))
190 return JNI_ERR;
191
192 memset(&caps, 0, sizeof(caps));
193 caps.can_generate_single_step_events = 1;
194 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities, jvmti, &caps))) {
195 return JNI_ERR;
196 }
197
198 memset(&callbacks, 0, sizeof(callbacks));
199 callbacks.SingleStep = &SingleStep;
200 if (!NSK_VERIFY(nsk_jvmti_init_MA(&callbacks)))
201 return JNI_ERR;
202
203 return JNI_OK;
204 }
205
206 /* ========================================================================== */
207
208 }