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