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