1/* 2 * Copyright (c) 2005, 2016, 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 */ 23package jdk.test.lib.apps; 24 25import java.util.concurrent.Phaser; 26 27public class LingeredAppWithDeadlock extends LingeredApp { 28 29 private static final Object Lock1 = new Object(); 30 private static final Object Lock2 = new Object(); 31 32 private static volatile int reachCount = 0; 33 34 private static final Phaser p = new Phaser(2); 35 36 private static class ThreadOne extends Thread { 37 public void run() { 38 // wait Lock2 is locked 39 p.arriveAndAwaitAdvance(); 40 synchronized (Lock1) { 41 // signal Lock1 is locked 42 p.arriveAndAwaitAdvance(); 43 synchronized (Lock2) { 44 reachCount += 1; 45 } 46 } 47 } 48 } 49 50 private static class ThreadTwo extends Thread { 51 public void run() { 52 synchronized (Lock2) { 53 // signal Lock2 is locked 54 p.arriveAndAwaitAdvance(); 55 // wait Lock1 is locked 56 p.arriveAndAwaitAdvance(); 57 synchronized (Lock1) { 58 reachCount += 1; 59 } 60 } 61 } 62 } 63 64 public static void main(String args[]) { 65 if (args.length != 1) { 66 System.err.println("Lock file name is not specified"); 67 System.exit(7); 68 } 69 70 // Run two theads that should come to deadlock 71 new ThreadOne().start(); 72 new ThreadTwo().start(); 73 74 if (reachCount > 0) { 75 // Not able to deadlock, exiting 76 System.exit(3); 77 } 78 79 LingeredApp.main(args); 80 } 81 } 82