90 lines
2.7 KiB
Java
90 lines
2.7 KiB
Java
/*
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* Copyright 2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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/*
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* @test
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* @bug 6379235
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* @run main/othervm -server -Xmx32m -Xms32m -Xss256m StartOOMTest
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* @summary ThreadGroup accounting mistake possible with failure of Thread.start()
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*/
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import java.util.*;
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public class StartOOMTest
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{
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public static void main(String[] args) throws Throwable {
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Runnable r = new SleepRunnable();
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ThreadGroup tg = new ThreadGroup("buggy");
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List<Thread> threads = new ArrayList<Thread>();
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Thread failedThread;
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int i = 0;
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for (i = 0; ; i++) {
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Thread t = new Thread(tg, r);
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try {
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t.start();
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threads.add(t);
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} catch (Throwable x) {
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failedThread = t;
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System.out.println(x);
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System.out.println(i);
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break;
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}
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}
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int j = 0;
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for (Thread t : threads)
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t.interrupt();
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while (tg.activeCount() > i/2)
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Thread.yield();
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failedThread.start();
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failedThread.interrupt();
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for (Thread t : threads)
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t.join();
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failedThread.join();
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try {
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Thread.sleep(1000);
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} catch (Throwable ignore) {
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}
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int activeCount = tg.activeCount();
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System.out.println("activeCount = " + activeCount);
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if (activeCount > 0) {
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throw new RuntimeException("Failed: there should be no active Threads in the group");
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}
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}
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static class SleepRunnable implements Runnable
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{
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public void run() {
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try {
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Thread.sleep(60*1000);
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} catch (Throwable t) {
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}
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}
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}
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}
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