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/*
* Copyright (c) 2023, Azul Systems, Inc. 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.util.concurrent.CountDownLatch;
/**
* @test
* @bug 6995195
* @summary Verify that concurrent classloading of GraphicsPrimitiveMgr
* and Blit doesn't deadlock
* @run main/othervm/timeout=20 GraphicsPrimitiveMgrTest
*/
public class GraphicsPrimitiveMgrTest {
private static volatile CountDownLatch latch;
private static final String C1 = "sun.java2d.loops.GraphicsPrimitiveMgr";
private static final String C2 = "sun.java2d.loops.Blit";
public static void main(final String[] args)
throws ClassNotFoundException, InterruptedException
{
// force loading awt library
Class.forName("java.awt.Toolkit");
latch = new CountDownLatch(2);
Thread t1 = new Thread(() -> loadClass(C1));
Thread t2 = new Thread(() -> loadClass(C2));
t1.start();
t2.start();
t1.join();
t2.join();
}
private static void loadClass(String className) {
System.out.println(Thread.currentThread().getName() + " loading " + className);
try {
latch.countDown();
latch.await();
Class.forName(className);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
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