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 package org.graalvm.compiler.jtt.threads;
  26 
  27 import org.junit.Test;
  28 
  29 import org.graalvm.compiler.jtt.JTTTest;
  30 
  31 /**
  32  * Inspired by {@code com.sun.media.sound.DirectAudioDevice$DirectDL.drain()}.
  33  *
  34  * Two loop exits hold a monitor while merging.
  35  *
  36  */
  37 public final class SynchronizedLoopExit01 extends JTTTest {
  38 
  39     protected Object object = new Object();
  40     protected volatile boolean drained = false;
  41     protected volatile boolean someBoolean = true;
  42 
  43     public boolean test() {
  44         boolean b = true;
  45         while (!drained) {
  46             synchronized (object) {
  47                 boolean c = b = someBoolean;
  48                 if (c || drained) {
  49                     break;
  50                 }
  51             }
  52         }
  53         return b;
  54     }
  55 
  56     @Test(timeout = 20000)
  57     public void run0() throws Throwable {
  58         runTest("test");
  59     }
  60 
  61 }