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