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
24import java.awt.Frame;
25import java.awt.GraphicsConfiguration;
26import java.awt.Window;
27
28import static java.util.concurrent.TimeUnit.MINUTES;
29import static java.util.concurrent.TimeUnit.NANOSECONDS;
30
31/**
32 * @test
33 * @key headful
34 * @bug 8138764
35 */
36public 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}
90