J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * @test |
| 26 | * @bug 6379235 |
| 27 | * @run main/othervm -server -Xmx32m -Xms32m -Xss256m StartOOMTest |
| 28 | * @summary ThreadGroup accounting mistake possible with failure of Thread.start() |
| 29 | */ |
| 30 | |
| 31 | import java.util.*; |
| 32 | |
| 33 | public class StartOOMTest |
| 34 | { |
| 35 | public static void main(String[] args) throws Throwable { |
| 36 | Runnable r = new SleepRunnable(); |
| 37 | ThreadGroup tg = new ThreadGroup("buggy"); |
| 38 | List<Thread> threads = new ArrayList<Thread>(); |
| 39 | Thread failedThread; |
| 40 | int i = 0; |
| 41 | for (i = 0; ; i++) { |
| 42 | Thread t = new Thread(tg, r); |
| 43 | try { |
| 44 | t.start(); |
| 45 | threads.add(t); |
| 46 | } catch (Throwable x) { |
| 47 | failedThread = t; |
| 48 | System.out.println(x); |
| 49 | System.out.println(i); |
| 50 | break; |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | int j = 0; |
| 55 | for (Thread t : threads) |
| 56 | t.interrupt(); |
| 57 | |
| 58 | while (tg.activeCount() > i/2) |
| 59 | Thread.yield(); |
| 60 | failedThread.start(); |
| 61 | failedThread.interrupt(); |
| 62 | |
| 63 | for (Thread t : threads) |
| 64 | t.join(); |
| 65 | failedThread.join(); |
| 66 | |
| 67 | try { |
| 68 | Thread.sleep(1000); |
| 69 | } catch (Throwable ignore) { |
| 70 | } |
| 71 | |
| 72 | int activeCount = tg.activeCount(); |
| 73 | System.out.println("activeCount = " + activeCount); |
| 74 | |
| 75 | if (activeCount > 0) { |
| 76 | throw new RuntimeException("Failed: there should be no active Threads in the group"); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | static class SleepRunnable implements Runnable |
| 81 | { |
| 82 | public void run() { |
| 83 | try { |
| 84 | Thread.sleep(60*1000); |
| 85 | } catch (Throwable t) { |
| 86 | } |
| 87 | } |
| 88 | } |
| 89 | } |