| /* |
| * Copyright (c) 2007, 2019, 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. |
| */ |
| |
| package gc.cslocker; |
| |
| import static gc.testlibrary.Allocation.blackHole; |
| |
| /* |
| * @test TestCSLocker |
| * @key gc |
| * @bug 6186200 |
| * @library / |
| * @summary This short test check RFE 6186200 changes. One thread locked |
| * @summary completely in JNI CS, while other is trying to allocate memory |
| * @summary provoking GC. OOM means FAIL, deadlock means PASS. |
| * @run main/native/othervm -Xmx256m gc.cslocker.TestCSLocker |
| */ |
| |
| public class TestCSLocker extends Thread |
| { |
| static int timeout = 5000; |
| public static void main(String args[]) throws Exception { |
| long startTime = System.currentTimeMillis(); |
| |
| // start garbage producer thread |
| GarbageProducer garbageProducer = new GarbageProducer(1000000, 10); |
| garbageProducer.start(); |
| |
| // start CS locker thread |
| CSLocker csLocker = new CSLocker(); |
| csLocker.start(); |
| |
| // check timeout to success deadlocking |
| while(System.currentTimeMillis() < startTime + timeout) { |
| System.out.println("sleeping..."); |
| sleep(1000); |
| } |
| |
| csLocker.unlock(); |
| garbageProducer.interrupt(); |
| } |
| } |
| |
| class GarbageProducer extends Thread |
| { |
| private int size; |
| private int sleepTime; |
| |
| GarbageProducer(int size, int sleepTime) { |
| this.size = size; |
| this.sleepTime = sleepTime; |
| } |
| |
| public void run() { |
| boolean isRunning = true; |
| |
| while (isRunning) { |
| try { |
| blackHole(new int[size]); |
| sleep(sleepTime); |
| } catch (InterruptedException e) { |
| isRunning = false; |
| } |
| } |
| } |
| } |
| |
| class CSLocker extends Thread |
| { |
| static { System.loadLibrary("TestCSLocker"); } |
| |
| public void run() { |
| int[] a = new int[10]; |
| a[0] = 1; |
| if (!lock(a)) { |
| throw new RuntimeException("failed to acquire CSLock"); |
| } |
| } |
| |
| native boolean lock(int[] array); |
| native void unlock(); |
| } |