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 31 import java.util.concurrent.CountDownLatch; 32 33 public class Stop { 34 35 private static final CountDownLatch ready = new CountDownLatch(1); 36 private static final ThreadGroup group = new ThreadGroup(""); 37 38 private static final Thread second = new Thread(group, () -> { 39 ready.countDown(); 40 while (true) { // keep it alive 41 } 42 }); 43 44 private static final Thread first = new Thread(group, () -> { 45 // Wait until "second" is started 46 try { 47 ready.await(); 48 } catch (InterruptedException shouldNotHappen) {} 49 // Now stop the group 50 group.stop(); 51 }); 52 53 public static void main(String[] args) throws Exception { 54 // Launch two threads as part of the same thread group 55 first.start(); 56 second.start(); 57 58 // Check that the second thread is terminated when the 59 // first thread terminates the thread group. 60 second.join(); 61 // Test passed - if never get here the test times out and fails. 62 } 63 }