1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 /**
18  * Test that daemon threads still contending for a lock don't make the runtime abort on shutdown.
19  */
20 public class Main {
21 
22     public final static int THREAD_COUNT = 32;
23 
main(String[] args)24     public static void main(String[] args) throws Exception {
25         Object sync = new Object();
26 
27         for (int i = 0; i < THREAD_COUNT; i++) {
28             Thread t = new Thread(new Wait(sync));
29             t.setDaemon(true);
30             t.start();
31         }
32     }
33 
34     private static class Wait implements Runnable {
35         private Object obj;
36 
Wait(Object obj)37         public Wait(Object obj) {
38             this.obj = obj;
39         }
40 
run()41         public void run() {
42             for (;;) {
43                 synchronized(obj) {
44                     try {
45                         obj.wait(1);
46                     } catch (Exception exc) {
47                         exc.printStackTrace(System.out);
48                     }
49                 }
50             }
51         }
52     }
53 }
54