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(
70 NSK_CPP_STUB3(GetAllThreads, jvmti, &threads_count, &threads)))
71 return NSK_FALSE;
72
73 if (!NSK_VERIFY(threads_count > 0 && threads != NULL))
74 return NSK_FALSE;
75
76 /* find tested thread */
77 for (i = 0; i < threads_count; i++) {
78 if (!NSK_VERIFY(threads[i] != NULL))
79 return NSK_FALSE;
80
81 /* get thread information */
82 if (!NSK_JVMTI_VERIFY(
83 NSK_CPP_STUB3(GetThreadInfo, jvmti, threads[i], &info)))
84 return NSK_FALSE;
85
86 NSK_DISPLAY3(" thread #%d (%s): %p\n", i, info.name, threads[i]);
87
88 /* find by name */
89 if (info.name != NULL && (strcmp(info.name, THREAD_NAME) == 0)) {
90 thread = threads[i];
91 }
92
93 if (info.name != NULL) {
94 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(
95 Deallocate, jvmti, (unsigned char*)info.name)))
96 return NSK_FALSE;
97 }
98 }
99
100 /* deallocate threads list */
101 if (!NSK_JVMTI_VERIFY(
102 NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)threads)))
103 return NSK_FALSE;
104
105 if (thread == NULL) {
106 NSK_COMPLAIN0("Debuggee thread not found");
107 return NSK_FALSE;
108 }
109
110 /* get tested thread class */
111 if (!NSK_JNI_VERIFY(jni, (klass =
112 NSK_CPP_STUB2(GetObjectClass, jni, thread)) != NULL))
113 return NSK_FALSE;
114
115 /* get tested thread field 'MAX_LADDER' */
116 if (!NSK_JNI_VERIFY(jni, (fid =
117 NSK_CPP_STUB4(GetStaticFieldID, jni, klass,
118 "MAX_LADDER", "I")) != NULL))
119 return NSK_FALSE;
120
121 MAX_LADDER = NSK_CPP_STUB3(GetStaticIntField, jni, klass, fid);
122 NSK_DISPLAY1("MAX_LADDER: %d\n", MAX_LADDER);
123
124 /* get tested thread field 'depth' */
125 if (!NSK_JNI_VERIFY(jni, (field =
126 NSK_CPP_STUB4(GetFieldID, jni, klass, "depth", "I")) != NULL))
127 return NSK_FALSE;
128
129 /* get tested thread method 'run' */
130 if (!NSK_JNI_VERIFY(jni, (methodRun =
131 NSK_CPP_STUB4(GetMethodID, jni, klass, "run", "()V")) != NULL))
132 return NSK_FALSE;
133
134 /* get tested thread method 'catcher' */
135 if (!NSK_JNI_VERIFY(jni, (methodCatcher =
136 NSK_CPP_STUB4(GetMethodID, jni, klass, "catcher", "(II)V")) != NULL))
137 return NSK_FALSE;
138
139 /* get tested thread method 'thrower' */
140 if (!NSK_JNI_VERIFY(jni, (methodThrower=
141 NSK_CPP_STUB4(GetMethodID, jni, klass, "thrower", "(I)V")) != NULL))
142 return NSK_FALSE;
143
144 if (!NSK_JVMTI_VERIFY(
145 NSK_CPP_STUB3(CreateRawMonitor, jvmti, "waitLock", &waitLock)))
146 return NSK_FALSE;
147
148 return NSK_TRUE;
149 }
150
151 /* ============================================================================= */
152
153 static int wait_for(jvmtiEnv* jvmti, jlong millis) {
154
155 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorEnter, jvmti, waitLock)))
156 return NSK_FALSE;
157
158 if (!NSK_JVMTI_VERIFY(
159 NSK_CPP_STUB3(RawMonitorWait, jvmti, waitLock, millis)))
160 nsk_jvmti_setFailStatus();
161
162 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorExit, jvmti, waitLock)))
163 return NSK_FALSE;
164
165 return NSK_TRUE;
166 }
167
168 static int displayFrameInfo(jvmtiEnv* jvmti, jint i) {
169 char buffer[32];
170 char *name = NULL;
171 char *signature = NULL;
172
173 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB5(GetMethodName, jvmti,
174 frameBuffer[frameCount-1-i].method, &name, &signature, NULL)))
175 return NSK_FALSE;
176
177 NSK_DISPLAY4(" [%d] method: %s%s, location: %s\n", i, name,
178 signature, jlong_to_string(frameBuffer[frameCount-1-i].location, buffer));
179 if (name != NULL)
180 NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)name);
181 if (signature != NULL)
182 NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)signature);
183
184 return NSK_TRUE;
185 }
186
187 static int complainFrameInfo(jvmtiEnv* jvmti, jint i, jmethodID method) {
188 char buffer[32];
189 char *name = NULL;
190 char *signature = NULL;
191
192 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB5(GetMethodName, jvmti,
193 frameBuffer[frameCount-1-i].method, &name, &signature, NULL)))
194 return NSK_FALSE;
195
196 NSK_COMPLAIN3(" got method: %s%s, location: %s\n", name, signature,
197 jlong_to_string(frameBuffer[frameCount-1-i].location, buffer));
198 if (name != NULL)
199 NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)name);
200 if (signature != NULL)
201 NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)signature);
202
203 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB5(GetMethodName, jvmti,
204 method, &name, &signature, NULL)))
205 return NSK_FALSE;
206
207 NSK_COMPLAIN2(" expected method: %s%s\n", name, signature);
208
209 return NSK_TRUE;
210 }
211
212 static int checkStackTrace(jvmtiEnv* jvmti, JNIEnv* jni) {
213 int res = NSK_TRUE;
214 jmethodID method = NULL;
215 jint depth;
216 jint i;
217 int displayFlag =
218 (nsk_getVerboseMode() && (sampleCount % DISPLAYING_FREQUENCY) == 0);
219
220 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(SuspendThread, jvmti, thread)))
221 return NSK_FALSE;
222
223 depth = NSK_CPP_STUB3(GetIntField, jni, thread, field);
224
225 /* get stack trace */
226 if (!NSK_JVMTI_VERIFY(
227 NSK_CPP_STUB6(GetStackTrace, jvmti, thread,
228 0, MAX_DEPTH, frameBuffer, &frameCount))) {
229 res = NSK_FALSE;
230 }
231
232 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(ResumeThread, jvmti, thread)))
233 res = NSK_FALSE;
234
235 if (res) {
236 if (displayFlag) {
237 NSK_DISPLAY3("Sample #%d, frameCount: %d, depth: %d\n",
238 sampleCount, frameCount, depth);
239 }
240 for (i = 0; i < frameCount; i++) {
241 if (displayFlag && !displayFrameInfo(jvmti, i))
242 res = NSK_FALSE;
243 if (i == 0) {
244 method = methodRun;
245 } else if (i <= (depth + 1)) {
246 method = methodCatcher;
247 } else if (i <= (MAX_LADDER + 2)) {
248 method = methodThrower;
249 } else {
250 continue;
251 }
252 if (!NSK_VERIFY(frameBuffer[frameCount-1-i].method == method)) {
253 NSK_COMPLAIN3("Sample #%d, depth=%d, wrong frame [%d]:\n",
254 sampleCount, depth, i);
255 complainFrameInfo(jvmti, i, method);
256 res = NSK_FALSE;
257 }
258 }
259 }
260
261 return res;
262 }
263
264 /* ========================================================================== */
265
266 /* agent algorithm */
267 static void JNICALL
268 agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) {
269
270 /* wait for initial sync */
271 if (!nsk_jvmti_waitForSync(timeout))
272 return;
273
274 if (!prepare(jvmti, jni)) {
275 nsk_jvmti_setFailStatus();
276 return;
277 }
278
279 /* sample stack of the tested thread */
280 for (sampleCount = 0;
281 sampleCount < NUMBER_OF_SAMPLES && !nsk_jvmti_isFailStatus();
282 sampleCount++) {
283 wait_for(jvmti, SAMPLING_INTERVAL);
284 if (!checkStackTrace(jvmti, jni))
285 nsk_jvmti_setFailStatus();
286 }
287
288 /* resume debugee after last sync */
289 if (!nsk_jvmti_resumeSync())
290 return;
291 }
292
293 /* ========================================================================== */
294
295 /* agent library initialization */
296 #ifdef STATIC_BUILD
297 JNIEXPORT jint JNICALL Agent_OnLoad_sp07t002(JavaVM *jvm, char *options, void *reserved) {
298 return Agent_Initialize(jvm, options, reserved);
299 }
300 JNIEXPORT jint JNICALL Agent_OnAttach_sp07t002(JavaVM *jvm, char *options, void *reserved) {
301 return Agent_Initialize(jvm, options, reserved);
302 }
303 JNIEXPORT jint JNI_OnLoad_sp07t002(JavaVM *jvm, char *options, void *reserved) {
304 return JNI_VERSION_1_8;
305 }
306 #endif
307 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
308 jvmtiEnv* jvmti = NULL;
309 jvmtiCapabilities caps;
310
311 /* init framework and parse options */
312 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
313 return JNI_ERR;
314
315 timeout = nsk_jvmti_getWaitTime() * 60000;
316 NSK_DISPLAY1("Timeout: %d msc\n", (int)timeout);
317
318 /* create JVMTI environment */
319 if (!NSK_VERIFY((jvmti =
320 nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
321 return JNI_ERR;
322
323 memset(&caps, 0, sizeof(caps));
324 caps.can_suspend = 1;
325 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities, jvmti, &caps)))
326 return JNI_ERR;
327
328 /* register agent proc and arg */
329 if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))
330 return JNI_ERR;
331
332 return JNI_OK;
333 }
334
335 /* ========================================================================== */
336
337 }