1/*
2 * Copyright (c) 1999, 2016, 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 * @test
26 * @bug 4176355
27 * @summary Stopping a ThreadGroup that contains the current thread has
28 *          unpredictable results.
29 */
30
31import java.util.concurrent.CountDownLatch;
32
33public class Stop {
34
35    public static void main(String[] args) throws Exception {
36        final CountDownLatch ready = new CountDownLatch(1);
37        final ThreadGroup group = new ThreadGroup("");
38
39        final Thread second = new Thread(group, () -> {
40            ready.countDown();
41            while (true) {
42                try {
43                    Thread.sleep(60000);
44                } catch (InterruptedException shouldNotHappen) {
45                }
46            }
47        });
48
49        final Thread first = new Thread(group, () -> {
50            // Wait until "second" is started
51            try {
52                ready.await();
53            } catch (InterruptedException shouldNotHappen) {
54            }
55            // Now stop the group
56            group.stop();
57        });
58
59        // Launch two threads as part of the same thread group
60        first.start();
61        second.start();
62
63        // Check that the second thread is terminated when the
64        // first thread terminates the thread group.
65        second.join();
66        // Test passed - if never get here the test times out and fails.
67    }
68}
69