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  * @key headful
  34  * @bug 8138764
  35  */
  36 public final class TreeLockDeadlock extends Frame {
  37 
  38     @Override
  39     public synchronized GraphicsConfiguration getGraphicsConfiguration() {
  40         return super.getGraphicsConfiguration();
  41     }
  42 
  43     @Override
  44     public synchronized void reshape(int x, int y, int width, int height) {
  45         super.reshape(x, y, width, height);
  46     }
  47 
  48     @Override
  49     public synchronized float getOpacity() {
  50         return super.getOpacity();
  51     }
  52 
  53     public static void main(final String[] args) throws Exception {
  54         final Window window = new TreeLockDeadlock();
  55         window.setSize(300, 300);
  56         test(window);
  57     }
  58 
  59     private static void test(final Window window) throws Exception {
  60         final long start = System.nanoTime();
  61         final long end = start + NANOSECONDS.convert(1, MINUTES);
  62 
  63         final Runnable r1 = () -> {
  64             while (System.nanoTime() < end) {
  65                 window.setBounds(window.getBounds());
  66             }
  67         };
  68         final Runnable r2 = () -> {
  69             while (System.nanoTime() < end) {
  70                 window.getGraphicsConfiguration();
  71                 window.getOpacity();
  72             }
  73         };
  74 
  75         final Thread t1 = new Thread(r1);
  76         final Thread t2 = new Thread(r1);
  77         final Thread t3 = new Thread(r2);
  78         final Thread t4 = new Thread(r2);
  79 
  80         t1.start();
  81         t2.start();
  82         t3.start();
  83         t4.start();
  84         t1.join();
  85         t2.join();
  86         t3.join();
  87         t4.join();
  88     }
  89 }