94 lines
2.9 KiB
Java
94 lines
2.9 KiB
Java
/*
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* Copyright (c) 2007, 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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* This test is relatively useful for verifying 6379235, but
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* is too resource intensive, especially on 64 bit systems,
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* to be run automatically, see 6721694.
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*
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* When run it should be typically be run with the server vm
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* and a relatively small java heap, and a large stack size
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* ( to provoke the OOM quicker ).
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* java -server -Xmx32m -Xms32m -Xss256m StartOOMTest
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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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