1 /*
   2  * Copyright (c) 2015, 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 import java.awt.Frame;
  25 import java.awt.GraphicsConfiguration;
  26 import java.awt.Window;
  27 
  28 import static java.util.concurrent.TimeUnit.MINUTES;
  29 import static java.util.concurrent.TimeUnit.NANOSECONDS;
  30 
  31 /**
  32  * @test
  33  * @bug 8138764
  34  */
  35 public final class TreeLockDeadlock extends Frame {
  36 
  37     @Override
  38     public synchronized GraphicsConfiguration getGraphicsConfiguration() {
  39         return super.getGraphicsConfiguration();
  40     }
  41 
  42     @Override
  43     public synchronized void reshape(int x, int y, int width, int height) {
  44         super.reshape(x, y, width, height);
  45     }
  46 
  47     @Override
  48     public synchronized float getOpacity() {
  49         return super.getOpacity();
  50     }
  51 
  52     public static void main(final String[] args) throws Exception {
  53         final Window window = new TreeLockDeadlock();
  54         window.setSize(300, 300);
  55         test(window);
  56     }
  57 
  58     private static void test(final Window window) throws Exception {
  59         final long start = System.nanoTime();
  60         final long end = start + NANOSECONDS.convert(1, MINUTES);
  61 
  62         final Runnable r1 = () -> {
  63             while (System.nanoTime() < end) {
  64                 window.setBounds(window.getBounds());
  65             }
  66         };
  67         final Runnable r2 = () -> {
  68             while (System.nanoTime() < end) {
  69                 window.getGraphicsConfiguration();
  70                 window.getOpacity();
  71             }
  72         };
  73 
  74         final Thread t1 = new Thread(r1);
  75         final Thread t2 = new Thread(r1);
  76         final Thread t3 = new Thread(r2);
  77         final Thread t4 = new Thread(r2);
  78 
  79         t1.start();
  80         t2.start();
  81         t3.start();
  82         t4.start();
  83         t1.join();
  84         t2.join();
  85         t3.join();
  86         t4.join();
  87     }
  88 }