1 /* 2 * Copyright (c) 2007, 2017 Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test TestCSLocker 26 * @key gc 27 * @bug 6186200 28 * @summary This short test check RFE 6186200 changes. One thread locked completely in JNI CS while other trying 29 * @summary to allocate memory provoking GC. OOM means FAIL, deadlock means PASS. 30 * @run main/native/othervm -Xmx256m TestCSLocker 31 */ 32 33 public class TestCSLocker extends Thread 34 { 35 static int timeout = 5000; 36 public static void main(String args[]) throws InterruptedException { 37 long startTime = System.currentTimeMillis(); 38 39 // start garbage producer thread 40 GarbageProducer garbageProducer = new GarbageProducer(1000000, 10); 41 garbageProducer.start(); 42 43 // start CS locker thread 44 CSLocker csLocker = new CSLocker(); 45 csLocker.start(); 46 47 // check timeout to success deadlocking 48 while(System.currentTimeMillis() < startTime + timeout) { 49 System.out.println("sleeping..."); 50 sleep(1000); 51 } 52 53 csLocker.unlock(); 54 garbageProducer.interrupt(); 55 } 56 } 57 58 class GarbageProducer extends Thread 59 { 60 private int size; 61 private int sleepTime; 62 63 GarbageProducer(int size, int sleepTime) { 64 this.size = size; 65 this.sleepTime = sleepTime; 66 } 67 68 public void run() { 69 boolean isRunning = true; 70 71 while (isRunning) { 72 try { 73 int[] arr = null; 74 arr = new int[size]; 75 sleep(sleepTime); 76 } catch (InterruptedException e) { 77 isRunning = false; 78 } 79 } 80 } 81 } 82 83 class CSLocker extends Thread 84 { 85 static { System.loadLibrary("TestCSLocker"); } 86 87 public void run() { 88 int[] a = new int[10]; 89 a[0] = 1; 90 lock(a); 91 } 92 93 native void lock(int[] array); 94 native void unlock(); 95 }