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/*
* Copyright (c) 2015, 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.
*/
/**
* @test
* @bug 8072466
* @summary Deadlock when initializing MulticastSocket and DatagramSocket
* @library /lib/testlibrary
* @build jdk.testlibrary.*
* @run main/othervm MultiDead
*/
import java.net.DatagramSocket;
import java.net.MulticastSocket;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicReference;
import java.util.concurrent.CountDownLatch;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import jdk.testlibrary.JDKToolLauncher;
import jdk.testlibrary.Utils;
public class MultiDead {
private static final int THREAD_PAIR_COUNT = 4;
private static final int CHILDREN_COUNT = 20;
// at least 2.5 seconds for a child to complete
private static final long CHILD_TIMEOUT = 2500;
private static final long TIMEOUT =
Utils.adjustTimeout(CHILDREN_COUNT * CHILD_TIMEOUT * 2);
public static void main(String[] args) throws Throwable {
if (args.length == 0 || args[0].equals("parent")) {
parentProcess();
}
if (args.length > 0 && args[0].equals("child")) {
childProcess();
}
}
private static void parentProcess() throws Throwable {
JDKToolLauncher launcher = JDKToolLauncher
.createUsingTestJDK("java")
.addToolArg("MultiDead")
.addToolArg("child");
ProcessBuilder pb = new ProcessBuilder(launcher.getCommand());
AtomicReference<Process> child = new AtomicReference<>();
AtomicBoolean stopFlag = new AtomicBoolean(false);
Thread th = new Thread(() -> {
for (int i = 0; i < CHILDREN_COUNT; ++i) {
System.out.println("child #" + (i + 1) + " of " +
CHILDREN_COUNT);
long start = System.nanoTime();
try {
child.set(pb.start());
child.get().waitFor();
if (stopFlag.get()) {
break;
}
} catch (Exception e) {
throw new RuntimeException(e);
}
if (System.nanoTime() - start >
MILLISECONDS.toNanos(CHILD_TIMEOUT)) {
System.err.println("Machine is too slow, " +
"skipping the test...");
break;
}
}
});
th.start();
th.join(TIMEOUT);
stopFlag.set(true);
if (th.isAlive()) {
if (child.get() != null) {
child.get().destroyForcibly();
}
throw new RuntimeException("Failed to complete on time.");
}
}
private static void childProcess() {
CountDownLatch latch = new CountDownLatch(1);
for (int i = 0; i < THREAD_PAIR_COUNT; ++i) {
new Thread(() -> {
try {
latch.await();
try (MulticastSocket a = new MulticastSocket(6000)) {
}
} catch (Exception ignore) {
}
}).start();
new Thread(() -> {
try {
latch.await();
try (DatagramSocket b = new DatagramSocket(6000)) {
}
} catch (Exception ignore) {
}
}).start();
}
latch.countDown();
}
}
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