0N/A/*
3909N/A * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
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0N/A */
0N/A
0N/A/*
3666N/A * This test is relatively useful for verifying 6379235, but
3666N/A * is too resource intensive, especially on 64 bit systems,
3666N/A * to be run automatically, see 6721694.
3666N/A *
3666N/A * When run it should be typically be run with the server vm
3666N/A * and a relatively small java heap, and a large stack size
3666N/A * ( to provoke the OOM quicker ).
3666N/A * java -server -Xmx32m -Xms32m -Xss256m StartOOMTest
0N/A */
0N/A
0N/Aimport java.util.*;
0N/A
0N/Apublic class StartOOMTest
0N/A{
0N/A public static void main(String[] args) throws Throwable {
0N/A Runnable r = new SleepRunnable();
0N/A ThreadGroup tg = new ThreadGroup("buggy");
0N/A List<Thread> threads = new ArrayList<Thread>();
0N/A Thread failedThread;
0N/A int i = 0;
0N/A for (i = 0; ; i++) {
0N/A Thread t = new Thread(tg, r);
0N/A try {
0N/A t.start();
0N/A threads.add(t);
0N/A } catch (Throwable x) {
0N/A failedThread = t;
0N/A System.out.println(x);
0N/A System.out.println(i);
0N/A break;
0N/A }
0N/A }
0N/A
0N/A int j = 0;
0N/A for (Thread t : threads)
0N/A t.interrupt();
0N/A
0N/A while (tg.activeCount() > i/2)
0N/A Thread.yield();
0N/A failedThread.start();
0N/A failedThread.interrupt();
0N/A
0N/A for (Thread t : threads)
0N/A t.join();
0N/A failedThread.join();
0N/A
0N/A try {
0N/A Thread.sleep(1000);
0N/A } catch (Throwable ignore) {
0N/A }
0N/A
0N/A int activeCount = tg.activeCount();
0N/A System.out.println("activeCount = " + activeCount);
0N/A
0N/A if (activeCount > 0) {
0N/A throw new RuntimeException("Failed: there should be no active Threads in the group");
0N/A }
0N/A }
0N/A
0N/A static class SleepRunnable implements Runnable
0N/A {
0N/A public void run() {
0N/A try {
0N/A Thread.sleep(60*1000);
0N/A } catch (Throwable t) {
0N/A }
0N/A }
0N/A }
0N/A}