1 /*
2 * Copyright (c) 2001, 2015, 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
25 /**
26 * @test
27 * @bug 4359247
28 * @summary Breakpoints on multiple threads have problems.
29 * @author tbell, jjh
30 *
31 * @build TestScaffold VMConnection TargetListener TargetAdapter
32 * @run compile -g MultiBreakpointsTest.java
33 * @run driver MultiBreakpointsTest
34 */
35
36 /*
37 * This test runs a debuggee with n threads each of which just loops
38 * doing some printlns and calling a method. The debugger sets
39 * bkpts on these methods and verifies that they are all hit.
40 * The default number of threads is 4. To change it to say 10,
41 * pass this to the testcase on the cmd line:
42 * -Dnthreads=10
43 * The current max allowed value of nthreads is 30.
44 * You can also do this, for example,
45 * -Dnhits=30
46 * to change the number of times the bkpts are to be hit from
47 * the default of 100 to 30.
48 */
49 import com.sun.jdi.*;
50 import com.sun.jdi.event.*;
51 import com.sun.jdi.request.*;
52
53 import java.util.*;
54
55 /********** target program **********/
56
57 import java.io.*;
58 import java.text.*;
59
60 class MultiBreakpointsTarg {
61
62 MultiBreakpointsTarg(int numThreads, int numHits) {
63 for (int ii = 0; ii < numThreads; ii++) {
64 console(ii, numHits);
65 }
66 }
67
68 public static void main(String args[]) {
69
70 int nthreads;
71 int nhits;
72 String nStr = System.getProperty("nthreads");
73
74 if (nStr == null) {
75 throw new RuntimeException("nthreads = null in debuggee");
76 }
77 nthreads = Integer.parseInt(nStr);
78
79 nStr = System.getProperty("nhits");
80 if (nStr == null) {
81 throw new RuntimeException("nhits = null in debuggee");
82 }
83 nhits = Integer.parseInt(nStr);
84
85 System.out.println("Debuggee: nthreads = " + nthreads + ", nhits = " + nhits);
86
87 MultiBreakpointsTarg ptr = new MultiBreakpointsTarg(nthreads, nhits);
88
89 // for (int i = 0; i < nthreads; i++) {
90 // ptr.console(i);
91 // }
92 }
93
94 // The brute force approach for simplicity - don't use reflection
95 // nor set thread specific bkpts. Use of those features would
96 // make for interesting tests too, and maybe would prove that
97 // we don't really have to bother doing it this dumb way.
98
99 void bkpt0() {}
100 void bkpt1() {}
101 void bkpt2() {}
102 void bkpt3() {}
103 void bkpt4() {}
104 void bkpt5() {}
105 void bkpt6() {}
106 void bkpt7() {}
107 void bkpt8() {}
108 void bkpt9() {}
109 void bkpt10() {}
110 void bkpt11() {}
111 void bkpt12() {}
112 void bkpt13() {}
113 void bkpt14() {}
114 void bkpt15() {}
115 void bkpt16() {}
116 void bkpt17() {}
117 void bkpt18() {}
118 void bkpt19() {}
119 void bkpt20() {}
120 void bkpt21() {}
121 void bkpt22() {}
122 void bkpt23() {}
123 void bkpt24() {}
124 void bkpt25() {}
125 void bkpt26() {}
126 void bkpt27() {}
127 void bkpt28() {}
128 void bkpt29() {}
129
130 void console(final int num, final int nhits) {
131 final InputStreamReader isr = new InputStreamReader(System.in);
132 final BufferedReader br = new BufferedReader(isr);
133
134 // Create the threads
135 //
136 //final String threadName = "DebuggeeThread: " + num;
137 final String threadName = "" + num;
138 Thread thrd = new Thread( threadName ) {
139 public void run() {
140 synchronized( isr ) {
141 boolean done = false;
142 try {
143 // For each thread, run until numHits bkpts have been hit
144 for( int i = 0; i < nhits; i++ ) {
145 // This is a tendril from the original jdb test.
146 // It could probably be deleted.
147 System.out.println("Thread " + threadName + " Enter a string: ");
148 String s = "test" + num;
149 switch (num) {
150 case 0: bkpt0(); break;
151 case 1: bkpt1(); break;
152 case 2: bkpt2(); break;
153 case 3: bkpt3(); break;
154 case 4: bkpt4(); break;
155 case 5: bkpt5(); break;
156 case 6: bkpt6(); break;
157 case 7: bkpt7(); break;
158 case 8: bkpt8(); break;
159 case 9: bkpt9(); break;
160 case 10: bkpt10(); break;
161 case 11: bkpt11(); break;
162 case 12: bkpt12(); break;
163 case 13: bkpt13(); break;
164 case 14: bkpt14(); break;
165 case 15: bkpt15(); break;
166 case 16: bkpt16(); break;
167 case 17: bkpt17(); break;
168 case 18: bkpt18(); break;
169 case 19: bkpt19(); break;
170 case 20: bkpt20(); break;
171 case 21: bkpt21(); break;
172 case 22: bkpt22(); break;
173 case 23: bkpt23(); break;
174 case 24: bkpt24(); break;
175 case 25: bkpt25(); break;
176 case 26: bkpt26(); break;
177 case 27: bkpt27(); break;
178 case 28: bkpt28(); break;
179 case 29: bkpt29(); break;
180 }
181 System.out.println("Thread " + threadName + " You entered : " + s);
182
183 if( s.compareTo( "quit" ) == 0 )
184 done = true;
185 }
186 } catch(Exception e) {
187 System.out.println("WOOPS");
188 }
189 }
190 }
191 };
192 thrd.setPriority(Thread.MAX_PRIORITY-1);
193 thrd.start();
194 }
195 }
196
197 /********** test program **********/
198
199 public class MultiBreakpointsTest extends TestScaffold {
200 ReferenceType targetClass;
201 ThreadReference mainThread;
202 EventRequestManager erm;
203
204 static int nthreads;
205 static int nhits;
206
207 BreakpointRequest bkpts[];
208 int hits[];
209
210 MultiBreakpointsTest (String args[]) {
211 super(args);
212 bkpts = new BreakpointRequest[nthreads];
213 hits = new int[nthreads];
214 }
215
216 public static void main(String[] args) throws Exception {
217 String countStr = System.getProperty("nthreads");
218 if (countStr == null) {
219 nthreads = 4;
220 } else {
221 nthreads = Integer.parseInt(countStr);
222 }
223 if ( nthreads > 30) {
224 throw new RuntimeException("nthreads is greater than 30: " + nthreads);
225 }
226 countStr = System.getProperty("nhits");
227 if (countStr == null) {
228 nhits = 100;
229 } else {
230 nhits = Integer.parseInt(countStr);
231 }
232
233 args = new String[] { "-J-Dnthreads=" + nthreads, "-J-Dnhits=" + nhits} ;
234 new MultiBreakpointsTest(args).startTests();
235 }
236
237 /********** event handlers **********/
238
239
240 public void breakpointReached(BreakpointEvent event) {
241 BreakpointRequest req = (BreakpointRequest)event.request();
242 for ( int ii = 0; ii < nthreads; ii++) {
243 if (req == bkpts[ii]) {
244 println("Hit bkpt on thread: " +ii+ ": " + ++hits[ii]);
245 break;
246 }
247 }
248 }
249
250
251 public BreakpointRequest setBreakpoint(String clsName,
252 String methodName,
253 String methodSignature) {
254 ReferenceType rt = findReferenceType(clsName);
255 if (rt == null) {
256 rt = resumeToPrepareOf(clsName).referenceType();
257 }
258
259 Method method = findMethod(rt, methodName, methodSignature);
260 if (method == null) {
261 throw new IllegalArgumentException("Bad method name/signature");
262 }
263 BreakpointRequest bpr = erm.createBreakpointRequest(method.location());
264 bpr.setSuspendPolicy(EventRequest.SUSPEND_ALL);
265 //bpr.setSuspendPolicy(EventRequest.SUSPEND_EVENT_THREAD);
266 bpr.enable();
267 return bpr;
268 }
269
270 /********** test core **********/
271
272 protected void runTests() throws Exception {
273 /*
274 * Get to the top of main()
275 * to determine targetClass and mainThread
276 */
277
278 BreakpointEvent bpe = startToMain("MultiBreakpointsTarg");
279
280 targetClass = bpe.location().declaringType();
281 mainThread = bpe.thread();
282 erm = vm().eventRequestManager();
283
284 for (int ii = 0 ; ii < nthreads; ii++) {
285 bkpts[ii] = setBreakpoint("MultiBreakpointsTarg",
286 "bkpt" + ii,
287 "()V");
288 }
289 /*
290 * resume the target listening for events
291 */
292 listenUntilVMDisconnect();
293
294 for ( int ii = 0; ii < nthreads; ii++) {
295 if (hits[ii] != nhits) {
296 failure("FAILED: Expected " + nhits + " breakpoints for thread " + ii + " but only got " + hits[ii]);
297 }
298 }
299
300 /*
301 * deal with results of test
302 * if anything has called failure("foo") testFailed will be true
303 */
304 if (!testFailed) {
305 println("MultiBreakpointsTest: passed");
306 } else {
307 throw new Exception("MultiBreakpointsTest: failed");
308 }
309 }
310 }