1 /*
2 * Copyright (c) 2001, 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 *
30 * @author tbell, jjh
31 *
32 * @build TestScaffold VMConnection TargetListener TargetAdapter
33 * @run compile -g MultiBreakpointsTest.java
34 * @run driver MultiBreakpointsTest
35 */
36
37 /*
38 * This test runs a debuggee with n threads each of which just loops
39 * doing some printlns and calling a method. The debugger sets
40 * bkpts on these methods and verifies that they are all hit.
41 * The default number of threads is 4. To change it to say 10,
42 * pass this to the testcase on the cmd line:
43 * -Dnthreads=10
44 * The current max allowed value of nthreads is 30.
45 * You can also do this, for example,
46 * -Dnhits=30
47 * to change the number of times the bkpts are to be hit from
48 * the default of 100 to 30.
49 */
50 import com.sun.jdi.*;
51 import com.sun.jdi.event.*;
52 import com.sun.jdi.request.*;
53
54 import java.util.*;
55
56 /********** target program **********/
57
58 import java.io.*;
59 import java.text.*;
60
61 class MultiBreakpointsTarg {
62
63 MultiBreakpointsTarg(int numThreads, int numHits) {
64 for (int ii = 0; ii < numThreads; ii++) {
65 console(ii, numHits);
66 }
67 }
68
69 public static void main(String args[]) {
70
71 int nthreads;
72 int nhits;
73 String nStr = System.getProperty("nthreads");
74
75 if (nStr == null) {
76 throw new RuntimeException("nthreads = null in debuggee");
77 }
78 nthreads = Integer.parseInt(nStr);
79
80 nStr = System.getProperty("nhits");
81 if (nStr == null) {
82 throw new RuntimeException("nhits = null in debuggee");
83 }
84 nhits = Integer.parseInt(nStr);
85
86 System.out.println("Debuggee: nthreads = " + nthreads + ", nhits = " + nhits);
87
88 MultiBreakpointsTarg ptr = new MultiBreakpointsTarg(nthreads, nhits);
89
90 // for (int i = 0; i < nthreads; i++) {
91 // ptr.console(i);
92 // }
93 }
94
95 // The brute force approach for simplicity - don't use reflection
96 // nor set thread specific bkpts. Use of those features would
97 // make for interesting tests too, and maybe would prove that
98 // we don't really have to bother doing it this dumb way.
99
100 void bkpt0() {}
101 void bkpt1() {}
102 void bkpt2() {}
103 void bkpt3() {}
104 void bkpt4() {}
105 void bkpt5() {}
106 void bkpt6() {}
107 void bkpt7() {}
108 void bkpt8() {}
109 void bkpt9() {}
110 void bkpt10() {}
111 void bkpt11() {}
112 void bkpt12() {}
113 void bkpt13() {}
114 void bkpt14() {}
115 void bkpt15() {}
116 void bkpt16() {}
117 void bkpt17() {}
118 void bkpt18() {}
119 void bkpt19() {}
120 void bkpt20() {}
121 void bkpt21() {}
122 void bkpt22() {}
123 void bkpt23() {}
124 void bkpt24() {}
125 void bkpt25() {}
126 void bkpt26() {}
127 void bkpt27() {}
128 void bkpt28() {}
129 void bkpt29() {}
130
131 void console(final int num, final int nhits) {
132 final InputStreamReader isr = new InputStreamReader(System.in);
133 final BufferedReader br = new BufferedReader(isr);
134
135 // Create the threads
136 //
137 //final String threadName = "DebuggeeThread: " + num;
138 final String threadName = "" + num;
139 Thread thrd = new Thread( threadName ) {
140 public void run() {
141 synchronized( isr ) {
142 boolean done = false;
143 try {
144 // For each thread, run until numHits bkpts have been hit
145 for( int i = 0; i < nhits; i++ ) {
146 // This is a tendril from the original jdb test.
147 // It could probably be deleted.
148 System.out.println("Thread " + threadName + " Enter a string: ");
149 String s = "test" + num;
150 switch (num) {
151 case 0: bkpt0(); break;
152 case 1: bkpt1(); break;
153 case 2: bkpt2(); break;
154 case 3: bkpt3(); break;
155 case 4: bkpt4(); break;
156 case 5: bkpt5(); break;
157 case 6: bkpt6(); break;
158 case 7: bkpt7(); break;
159 case 8: bkpt8(); break;
160 case 9: bkpt9(); break;
161 case 10: bkpt10(); break;
162 case 11: bkpt11(); break;
163 case 12: bkpt12(); break;
164 case 13: bkpt13(); break;
165 case 14: bkpt14(); break;
166 case 15: bkpt15(); break;
167 case 16: bkpt16(); break;
168 case 17: bkpt17(); break;
169 case 18: bkpt18(); break;
170 case 19: bkpt19(); break;
171 case 20: bkpt20(); break;
172 case 21: bkpt21(); break;
173 case 22: bkpt22(); break;
174 case 23: bkpt23(); break;
175 case 24: bkpt24(); break;
176 case 25: bkpt25(); break;
177 case 26: bkpt26(); break;
178 case 27: bkpt27(); break;
179 case 28: bkpt28(); break;
180 case 29: bkpt29(); break;
181 }
182 System.out.println("Thread " + threadName + " You entered : " + s);
183
184 if( s.compareTo( "quit" ) == 0 )
185 done = true;
186 }
187 } catch(Exception e) {
188 System.out.println("WOOPS");
189 }
190 }
191 }
192 };
193 thrd.setPriority(Thread.MAX_PRIORITY-1);
194 thrd.start();
195 }
196 }
197
198 /********** test program **********/
199
200 public class MultiBreakpointsTest extends TestScaffold {
201 ReferenceType targetClass;
202 ThreadReference mainThread;
203 EventRequestManager erm;
204
205 static int nthreads;
206 static int nhits;
207
208 BreakpointRequest bkpts[];
209 int hits[];
210
211 MultiBreakpointsTest (String args[]) {
212 super(args);
213 bkpts = new BreakpointRequest[nthreads];
214 hits = new int[nthreads];
215 }
216
217 public static void main(String[] args) throws Exception {
218 String countStr = System.getProperty("nthreads");
219 if (countStr == null) {
220 nthreads = 4;
221 } else {
222 nthreads = Integer.parseInt(countStr);
223 }
224 if ( nthreads > 30) {
225 throw new RuntimeException("nthreads is greater than 30: " + nthreads);
226 }
227 countStr = System.getProperty("nhits");
228 if (countStr == null) {
229 nhits = 100;
230 } else {
231 nhits = Integer.parseInt(countStr);
232 }
233
234 args = new String[] { "-J-Dnthreads=" + nthreads, "-J-Dnhits=" + nhits} ;
235 new MultiBreakpointsTest(args).startTests();
236 }
237
238 /********** event handlers **********/
239
240
241 public void breakpointReached(BreakpointEvent event) {
242 BreakpointRequest req = (BreakpointRequest)event.request();
243 for ( int ii = 0; ii < nthreads; ii++) {
244 if (req == bkpts[ii]) {
245 println("Hit bkpt on thread: " +ii+ ": " + ++hits[ii]);
246 break;
247 }
248 }
249 }
250
251
252 public BreakpointRequest setBreakpoint(String clsName,
253 String methodName,
254 String methodSignature) {
255 ReferenceType rt = findReferenceType(clsName);
256 if (rt == null) {
257 rt = resumeToPrepareOf(clsName).referenceType();
258 }
259
260 Method method = findMethod(rt, methodName, methodSignature);
261 if (method == null) {
262 throw new IllegalArgumentException("Bad method name/signature");
263 }
264 BreakpointRequest bpr = erm.createBreakpointRequest(method.location());
265 bpr.setSuspendPolicy(EventRequest.SUSPEND_ALL);
266 //bpr.setSuspendPolicy(EventRequest.SUSPEND_EVENT_THREAD);
267 bpr.enable();
268 return bpr;
269 }
270
271 /********** test core **********/
272
273 protected void runTests() throws Exception {
274 /*
275 * Get to the top of main()
276 * to determine targetClass and mainThread
277 */
278
279 BreakpointEvent bpe = startToMain("MultiBreakpointsTarg");
280
281 targetClass = bpe.location().declaringType();
282 mainThread = bpe.thread();
283 erm = vm().eventRequestManager();
284
285 for (int ii = 0 ; ii < nthreads; ii++) {
286 bkpts[ii] = setBreakpoint("MultiBreakpointsTarg",
287 "bkpt" + ii,
288 "()V");
289 }
290 /*
291 * resume the target listening for events
292 */
293 listenUntilVMDisconnect();
294
295 for ( int ii = 0; ii < nthreads; ii++) {
296 if (hits[ii] != nhits) {
297 failure("FAILED: Expected " + nhits + " breakpoints for thread " + ii + " but only got " + hits[ii]);
298 }
299 }
300
301 /*
302 * deal with results of test
303 * if anything has called failure("foo") testFailed will be true
304 */
305 if (!testFailed) {
306 println("MultiBreakpointsTest: passed");
307 } else {
308 throw new Exception("MultiBreakpointsTest: failed");
309 }
310 }
311 }