1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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  *
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22  */
23 
24 /*
25  * @test
26  * @bug 4288198
27  * @summary Killing a Timer thread causes the Timer to fail silently on
28  *          subsequent use.
29  */
30 
31 package test.java.util.Timer;
32 
33 import java.util.*;
34 
35 public class KillThread {
36     static volatile Thread tdThread;
37 
38     // Android-added: AndroidJUnitRunner brings down an app on uncaught exception.
39     private static final Thread.UncaughtExceptionHandler NO_OP_HANDLER = (t, e) -> {};
40 
main(String[] args)41     public static void main (String[] args) throws Exception  {
42         Timer t = new Timer();
43 
44         // Start a mean event that kills the timer thread
45         t.schedule(new TimerTask() {
46             public void run() {
47                 // Android-added: we don't want this test to be killed after ThreadDeath is
48                 // thrown.
49                 Thread.setDefaultUncaughtExceptionHandler(NO_OP_HANDLER);
50                 tdThread = Thread.currentThread();
51                 throw new ThreadDeath();
52             }
53         }, 0);
54 
55         // Wait for mean event to do the deed and thread to die.
56         try {
57             do {
58                 Thread.sleep(100);
59             } while(tdThread == null);
60         } catch(InterruptedException e) {
61         }
62         tdThread.join();
63 
64         // Try to start another event
65         try {
66             // Timer thread is dead now
67             t.schedule(new TimerTask() {
68                 public void run() {
69                 }
70             }, 0);
71             throw new Exception("We failed silently");
72         } catch(IllegalStateException e) {
73             // Killing the Timer thread is equivalent to cancelling the Timer
74         }
75     }
76 }
77