1 /*
2 * Copyright (c) 2018, 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 * @test
26 * @bug 8152974
27 * @key headful
28 * @modules java.desktop/sun.awt
29 * @summary AWT hang occurrs when sequenced events arrive out of sequence
30 * @run main SequencedEventTest
31 */
32 import sun.awt.AppContext;
33 import sun.awt.SunToolkit;
34
35 import java.awt.Robot;
36 import java.awt.Point;
37 import java.awt.Dimension;
38 import java.awt.FlowLayout;
39 import java.awt.AWTEvent;
40 import java.awt.Toolkit;
41 import java.awt.event.ActionEvent;
42 import java.awt.event.ActionListener;
43 import java.awt.event.InputEvent;
44 import java.lang.reflect.Constructor;
45 import java.util.concurrent.CountDownLatch;
46
47 import javax.swing.JFrame;
48 import javax.swing.JButton;
49 import javax.swing.SwingUtilities;
50 import javax.swing.JTextArea;
51
52 public class SequencedEventTest extends JFrame implements ActionListener {
53 private JButton spamMeButton;
54 private static Robot robot;
55 private static SequencedEventTest window;
56 private static AppContext context;
57
58 public static void main(String[] args) throws Exception {
59 SwingUtilities.invokeAndWait(() -> {
60 window = new SequencedEventTest();
61 window.setVisible(true);
62 });
63
64 robot = new Robot();
65 robot.waitForIdle();
66
67 Point pt = window.spamMeButton.getLocationOnScreen();
68 Dimension d = window.spamMeButton.getSize();
69
70 robot.mouseMove(pt.x + d.width / 2, pt.y + d.height / 2);
71 robot.waitForIdle();
72 robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
73 robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
74 /*
75 *Cannot have robot.waitForIdle() here since it will block the test forever,
76 * in the case of failure and the test will timeout.
77 */
78
79 try {
80 /*
81 * Wait for 2 seconds, and then see if all the sequenced events are dispatched.
82 */
83 Thread.sleep(2000);
84 AWTEvent ev = Toolkit.getDefaultToolkit().getSystemEventQueue().
85 peekEvent(java.awt.event.FocusEvent.FOCUS_LAST + 1);
86
87 if (ev != null)
88 throw new RuntimeException("Test case failed, since all the sequenced events" +
89 "are not flushed!" + ev);
90 } catch (InterruptedException e) {
91 throw new RuntimeException("Test case failed." + e.getMessage());
92 }
93
94 /*
95 * In the case of failure, the cleanup job cannot be executed, since it
96 * will block the test.
97 */
98 System.out.println("Test case succeeded.");
99 context.dispose();
100 SwingUtilities.invokeAndWait(() -> window.dispose());
101 }
102
103 public SequencedEventTest() {
104 super("Test Window");
105
106 setLayout(new FlowLayout());
107 JTextArea textBlock = new JTextArea("Lorem ipsum dolor sit amet...");
108 add(textBlock);
109
110 spamMeButton = new JButton("Press me!");
111 spamMeButton.addActionListener(this);
112 add(spamMeButton);
113 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
114 pack();
115 }
116
117 @Override
118 public void actionPerformed(ActionEvent e) {
119 if(e.getSource() == spamMeButton) {
120 AWTEvent eventOne = getSequencedEvent();
121 AWTEvent eventFour = getSequencedEvent();
122 ThreadGroup tg = new ThreadGroup("TestThreadGroup" );
123 CountDownLatch latch = new CountDownLatch(1);
124 Thread t = new Thread(tg, () -> {
125 context = SunToolkit.createNewAppContext();
126 AWTEvent eventTwo = getSequencedEvent();
127 AWTEvent eventThree = getSequencedEvent();
128
129 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventThree);
130 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 0, null));
131 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 1, null));
132 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventTwo);
133
134 latch.countDown();
135 });
136
137 t.start();
138 try {
139 latch.await();
140 }catch (InterruptedException ex) {
141 throw new RuntimeException("Test case failed.");
142 }
143
144 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventFour);
145 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 2, null));
146 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 3, null));
147 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventOne);
148
149 try {
150 t.join();
151 } catch (InterruptedException ex) {
152 throw new RuntimeException("Test case failed.");
153 }
154 }
155 }
156
157 private AWTEvent getSequencedEvent()
158 {
159 AWTEvent wrapMe = new AWTEvent(this, AWTEvent.RESERVED_ID_MAX) {};
160
161 try {
162 /*
163 * SequencedEvent is a package private class, which cannot be instantiated
164 * by importing. So use reflection to create an instance.
165 */
166 Class<? extends AWTEvent> seqClass = (Class<? extends AWTEvent>) Class.forName("java.awt.SequencedEvent");
167 Constructor<? extends AWTEvent> seqConst = seqClass.getConstructor(AWTEvent.class);
168 seqConst.setAccessible(true);
169 return seqConst.newInstance(wrapMe);
170 } catch (Throwable err) {
171 throw new RuntimeException("Unable to instantiate SequencedEvent",err);
172 }
173 }
174 }