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 extern "C" {
31
32 #define MAX_DEPTH 1024
33
34 /* ========================================================================== */
35
36 static const int NUMBER_OF_SAMPLES = 1000;
37 static const int DISPLAYING_FREQUENCY = 100;
38 static const jlong SAMPLING_INTERVAL = 10;
39
40 /* scaffold objects */
41 static jlong timeout = 0;
42
43 /* test objects */
44 static jthread thread = NULL;
45 static jrawMonitorID waitLock = NULL;
46 static jfieldID field = NULL;
47 static jmethodID methodRun = NULL;
48 static jmethodID methodCatcher = NULL;
49 static jmethodID methodThrower = NULL;
50 static jint MAX_LADDER = 0;
51 static int sampleCount = 0;
52 static jint frameCount = 0;
53 static jvmtiFrameInfo frameBuffer[MAX_DEPTH];
54
55 /* ========================================================================== */
56
57 static int prepare(jvmtiEnv* jvmti, JNIEnv* jni) {
58 const char* THREAD_NAME = "Debuggee Thread";
59 jvmtiThreadInfo info;
60 jthread *threads = NULL;
61 jint threads_count = 0;
62 jclass klass = NULL;
63 jfieldID fid = NULL;
64 int i;
65
66 NSK_DISPLAY0("Prepare: find tested thread\n");
67
68 /* get all live threads */
69 if (!NSK_JVMTI_VERIFY(jvmti->GetAllThreads(&threads_count, &threads)))
70 return NSK_FALSE;
71
72 if (!NSK_VERIFY(threads_count > 0 && threads != NULL))
73 return NSK_FALSE;
74
75 /* find tested thread */
76 for (i = 0; i < threads_count; i++) {
77 if (!NSK_VERIFY(threads[i] != NULL))
78 return NSK_FALSE;
79
80 /* get thread information */
81 if (!NSK_JVMTI_VERIFY(jvmti->GetThreadInfo(threads[i], &info)))
82 return NSK_FALSE;
83
84 NSK_DISPLAY3(" thread #%d (%s): %p\n", i, info.name, threads[i]);
85
86 /* find by name */
87 if (info.name != NULL && (strcmp(info.name, THREAD_NAME) == 0)) {
88 thread = threads[i];
89 }
90
91 if (info.name != NULL) {
92 if (!NSK_JVMTI_VERIFY(jvmti->Deallocate((unsigned char*)info.name)))
93 return NSK_FALSE;
94 }
95 }
96
97 /* deallocate threads list */
98 if (!NSK_JVMTI_VERIFY(jvmti->Deallocate((unsigned char*)threads)))
99 return NSK_FALSE;
100
101 if (thread == NULL) {
102 NSK_COMPLAIN0("Debuggee thread not found");
103 return NSK_FALSE;
104 }
105
106 /* get tested thread class */
107 if (!NSK_JNI_VERIFY(jni, (klass = jni->GetObjectClass(thread)) != NULL))
108 return NSK_FALSE;
109
110 /* get tested thread field 'MAX_LADDER' */
111 if (!NSK_JNI_VERIFY(jni, (fid = jni->GetStaticFieldID(klass, "MAX_LADDER", "I")) != NULL))
112 return NSK_FALSE;
113
114 MAX_LADDER = jni->GetStaticIntField(klass, fid);
115 NSK_DISPLAY1("MAX_LADDER: %d\n", MAX_LADDER);
116
117 /* get tested thread field 'depth' */
118 if (!NSK_JNI_VERIFY(jni, (field = jni->GetFieldID(klass, "depth", "I")) != NULL))
119 return NSK_FALSE;
120
121 /* get tested thread method 'run' */
122 if (!NSK_JNI_VERIFY(jni, (methodRun = jni->GetMethodID(klass, "run", "()V")) != NULL))
123 return NSK_FALSE;
124
125 /* get tested thread method 'catcher' */
126 if (!NSK_JNI_VERIFY(jni, (methodCatcher =
127 jni->GetMethodID(klass, "catcher", "(II)V")) != NULL))
128 return NSK_FALSE;
129
130 /* get tested thread method 'thrower' */
131 if (!NSK_JNI_VERIFY(jni, (methodThrower= jni->GetMethodID(klass, "thrower", "(I)V")) != NULL))
132 return NSK_FALSE;
133
134 if (!NSK_JVMTI_VERIFY(jvmti->CreateRawMonitor("waitLock", &waitLock)))
135 return NSK_FALSE;
136
137 return NSK_TRUE;
138 }
139
140 /* ============================================================================= */
141
142 static int wait_for(jvmtiEnv* jvmti, jlong millis) {
143
144 if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorEnter(waitLock)))
145 return NSK_FALSE;
146
147 if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorWait(waitLock, millis)))
148 nsk_jvmti_setFailStatus();
149
150 if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorExit(waitLock)))
151 return NSK_FALSE;
152
153 return NSK_TRUE;
154 }
155
156 static int displayFrameInfo(jvmtiEnv* jvmti, jint i) {
157 char buffer[32];
158 char *name = NULL;
159 char *signature = NULL;
160
161 if (!NSK_JVMTI_VERIFY(jvmti->GetMethodName(frameBuffer[frameCount-1-i].method, &name, &signature, NULL)))
162 return NSK_FALSE;
163
164 NSK_DISPLAY4(" [%d] method: %s%s, location: %s\n", i, name,
165 signature, jlong_to_string(frameBuffer[frameCount-1-i].location, buffer));
166 if (name != NULL)
167 jvmti->Deallocate((unsigned char*)name);
168 if (signature != NULL)
169 jvmti->Deallocate((unsigned char*)signature);
170
171 return NSK_TRUE;
172 }
173
174 static int complainFrameInfo(jvmtiEnv* jvmti, jint i, jmethodID method) {
175 char buffer[32];
176 char *name = NULL;
177 char *signature = NULL;
178
179 if (!NSK_JVMTI_VERIFY(jvmti->GetMethodName(frameBuffer[frameCount-1-i].method, &name, &signature, NULL)))
180 return NSK_FALSE;
181
182 NSK_COMPLAIN3(" got method: %s%s, location: %s\n", name, signature,
183 jlong_to_string(frameBuffer[frameCount-1-i].location, buffer));
184 if (name != NULL)
185 jvmti->Deallocate((unsigned char*)name);
186 if (signature != NULL)
187 jvmti->Deallocate((unsigned char*)signature);
188
189 if (!NSK_JVMTI_VERIFY(jvmti->GetMethodName(method, &name, &signature, NULL)))
190 return NSK_FALSE;
191
192 NSK_COMPLAIN2(" expected method: %s%s\n", name, signature);
193
194 return NSK_TRUE;
195 }
196
197 static int checkStackTrace(jvmtiEnv* jvmti, JNIEnv* jni) {
198 int res = NSK_TRUE;
199 jmethodID method = NULL;
200 jint depth;
201 jint i;
202 int displayFlag =
203 (nsk_getVerboseMode() && (sampleCount % DISPLAYING_FREQUENCY) == 0);
204
205 if (!NSK_JVMTI_VERIFY(jvmti->SuspendThread(thread)))
206 return NSK_FALSE;
207
208 depth = jni->GetIntField(thread, field);
209
210 /* get stack trace */
211 if (!NSK_JVMTI_VERIFY(jvmti->GetStackTrace(thread, 0, MAX_DEPTH, frameBuffer, &frameCount))) {
212 res = NSK_FALSE;
213 }
214
215 if (!NSK_JVMTI_VERIFY(jvmti->ResumeThread(thread)))
216 res = NSK_FALSE;
217
218 if (res) {
219 if (displayFlag) {
220 NSK_DISPLAY3("Sample #%d, frameCount: %d, depth: %d\n",
221 sampleCount, frameCount, depth);
222 }
223 for (i = 0; i < frameCount; i++) {
224 if (displayFlag && !displayFrameInfo(jvmti, i))
225 res = NSK_FALSE;
226 if (i == 0) {
227 method = methodRun;
228 } else if (i <= (depth + 1)) {
229 method = methodCatcher;
230 } else if (i <= (MAX_LADDER + 2)) {
231 method = methodThrower;
232 } else {
233 continue;
234 }
235 if (!NSK_VERIFY(frameBuffer[frameCount-1-i].method == method)) {
236 NSK_COMPLAIN3("Sample #%d, depth=%d, wrong frame [%d]:\n",
237 sampleCount, depth, i);
238 complainFrameInfo(jvmti, i, method);
239 res = NSK_FALSE;
240 }
241 }
242 }
243
244 return res;
245 }
246
247 /* ========================================================================== */
248
249 /* agent algorithm */
250 static void JNICALL
251 agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) {
252
253 /* wait for initial sync */
254 if (!nsk_jvmti_waitForSync(timeout))
255 return;
256
257 if (!prepare(jvmti, jni)) {
258 nsk_jvmti_setFailStatus();
259 return;
260 }
261
262 /* sample stack of the tested thread */
263 for (sampleCount = 0;
264 sampleCount < NUMBER_OF_SAMPLES && !nsk_jvmti_isFailStatus();
265 sampleCount++) {
266 wait_for(jvmti, SAMPLING_INTERVAL);
267 if (!checkStackTrace(jvmti, jni))
268 nsk_jvmti_setFailStatus();
269 }
270
271 /* resume debugee after last sync */
272 if (!nsk_jvmti_resumeSync())
273 return;
274 }
275
276 /* ========================================================================== */
277
278 /* agent library initialization */
279 #ifdef STATIC_BUILD
280 JNIEXPORT jint JNICALL Agent_OnLoad_sp07t002(JavaVM *jvm, char *options, void *reserved) {
281 return Agent_Initialize(jvm, options, reserved);
282 }
283 JNIEXPORT jint JNICALL Agent_OnAttach_sp07t002(JavaVM *jvm, char *options, void *reserved) {
284 return Agent_Initialize(jvm, options, reserved);
285 }
286 JNIEXPORT jint JNI_OnLoad_sp07t002(JavaVM *jvm, char *options, void *reserved) {
287 return JNI_VERSION_1_8;
288 }
289 #endif
290 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
291 jvmtiEnv* jvmti = NULL;
292 jvmtiCapabilities caps;
293
294 /* init framework and parse options */
295 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
296 return JNI_ERR;
297
298 timeout = nsk_jvmti_getWaitTime() * 60000;
299 NSK_DISPLAY1("Timeout: %d msc\n", (int)timeout);
300
301 /* create JVMTI environment */
302 if (!NSK_VERIFY((jvmti =
303 nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
304 return JNI_ERR;
305
306 memset(&caps, 0, sizeof(caps));
307 caps.can_suspend = 1;
308 if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps)))
309 return JNI_ERR;
310
311 /* register agent proc and arg */
312 if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))
313 return JNI_ERR;
314
315 return JNI_OK;
316 }
317
318 /* ========================================================================== */
319
320 }