88 lines
3.0 KiB
Java
88 lines
3.0 KiB
Java
/*
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* Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 4176355
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* @summary Stopping a ThreadGroup that contains the current thread has
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* unpredictable results.
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*/
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public class Stop implements Runnable {
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private static boolean groupStopped = false ;
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private static final Object lock = new Object();
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private static final ThreadGroup group = new ThreadGroup("");
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private static final Thread first = new Thread(group, new Stop());
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private static final Thread second = new Thread(group, new Stop());
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public void run() {
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while (true) {
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// Give the other thread a chance to start
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try {
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Thread.sleep(1000);
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} catch (InterruptedException e) {
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}
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// When the first thread runs, it will stop the group.
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if (Thread.currentThread() == first) {
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synchronized (lock) {
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try {
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group.stop();
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} finally {
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// Signal the main thread it is time to check
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// that the stopped thread group was successful
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groupStopped = true;
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lock.notifyAll();
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}
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}
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}
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}
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}
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public static void main(String[] args) throws Exception {
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// Launch two threads as part of the same thread group
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first.start();
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second.start();
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// Wait for the thread group stop to be issued
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synchronized(lock){
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while (!groupStopped) {
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lock.wait();
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// Give the other thread a chance to stop
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Thread.sleep(1000);
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}
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}
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// Check that the second thread is terminated when the
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// first thread terminates the thread group.
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boolean failed = second.isAlive();
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// Clean up any threads that may have not been terminated
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first.stop();
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second.stop();
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if (failed)
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throw new RuntimeException("Failure.");
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}
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}
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