1 /* 2 * Copyright (c) 2013, 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 26 27 package org.graalvm.compiler.jtt.threads; 28 29 import org.graalvm.compiler.jtt.JTTTest; 30 import org.graalvm.compiler.jtt.hotspot.NotOnDebug; 31 import org.junit.Rule; 32 import org.junit.Test; 33 import org.junit.rules.TestRule; 34 import org.junit.rules.Timeout; 35 36 /** 37 * Inspired by {@code com.sun.media.sound.DirectAudioDevice$DirectDL.drain()}. 38 * 39 * Two loop exits hold a monitor while merging. 40 * 41 */ 42 public final class SynchronizedLoopExit01 extends JTTTest { 43 44 @Rule public TestRule timeout = NotOnDebug.create(Timeout.seconds(20)); 45 46 protected Object object = new Object(); 47 protected volatile boolean drained = false; 48 protected volatile boolean someBoolean = true; 49 test()50 public boolean test() { 51 boolean b = true; 52 while (!drained) { 53 synchronized (object) { 54 boolean c = b = someBoolean; 55 if (c || drained) { 56 break; 57 } 58 } 59 } 60 return b; 61 } 62 63 @Test run0()64 public void run0() throws Throwable { 65 initializeForTimeout(); 66 runTest("test"); 67 } 68 69 } 70