| /* |
| * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import java.awt.Frame; |
| import java.awt.Graphics; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * @test |
| * @bug 8235638 8235739 |
| * @key headful |
| */ |
| public final class GetGraphicsStressTest { |
| |
| static volatile Throwable failed; |
| static volatile long endtime; |
| |
| public static void main(final String[] args) throws Exception { |
| // Catch all uncaught exceptions and treat them as test failure |
| Thread.setDefaultUncaughtExceptionHandler((t, e) -> failed = e); |
| |
| // Will run the test no more than 20 seconds |
| for (int i = 0; i < 4; i++) { |
| endtime = System.nanoTime() + TimeUnit.SECONDS.toNanos(5); |
| test(); |
| } |
| } |
| |
| private static void test() throws Exception { |
| Frame f = new Frame(); |
| f.setSize(100, 100); |
| f.setLocationRelativeTo(null); |
| f.setVisible(true); |
| |
| Thread thread1 = new Thread(() -> { |
| while (!isComplete()) { |
| f.removeNotify(); |
| f.addNotify(); |
| } |
| }); |
| Thread thread2 = new Thread(() -> { |
| while (!isComplete()) { |
| Graphics g = f.getGraphics(); |
| if (g != null) { |
| g.dispose(); |
| } |
| } |
| }); |
| Thread thread3 = new Thread(() -> { |
| while (!isComplete()) { |
| Graphics g = f.getGraphics(); |
| if (g != null) { |
| g.dispose(); |
| } |
| } |
| }); |
| Thread thread4 = new Thread(() -> { |
| while (!isComplete()) { |
| Graphics g = f.getGraphics(); |
| if (g != null) { |
| g.drawLine(0, 0, 4, 4); // just in case... |
| g.dispose(); |
| } |
| } |
| }); |
| thread1.start(); |
| thread2.start(); |
| thread3.start(); |
| thread4.start(); |
| thread1.join(); |
| thread2.join(); |
| thread3.join(); |
| thread4.join(); |
| |
| f.dispose(); |
| if (failed != null) { |
| System.err.println("Test failed"); |
| failed.printStackTrace(); |
| throw new RuntimeException(failed); |
| } |
| } |
| |
| private static boolean isComplete() { |
| return endtime - System.nanoTime() < 0 || failed != null; |
| } |
| } |