128 lines
4.4 KiB
Java
128 lines
4.4 KiB
Java
/*
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* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8072466
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* @summary Deadlock when initializing MulticastSocket and DatagramSocket
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* @library /test/lib
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* @run main/othervm MultiDead
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*/
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import java.net.DatagramSocket;
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import java.net.MulticastSocket;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.concurrent.atomic.AtomicReference;
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import java.util.concurrent.CountDownLatch;
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import static java.util.concurrent.TimeUnit.MILLISECONDS;
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import jdk.test.lib.JDKToolLauncher;
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import jdk.test.lib.Utils;
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public class MultiDead {
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private static final int THREAD_PAIR_COUNT = 4;
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private static final int CHILDREN_COUNT = 20;
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// at least 2.5 seconds for a child to complete
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private static final long CHILD_TIMEOUT = 2500;
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private static final long TIMEOUT =
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Utils.adjustTimeout(CHILDREN_COUNT * CHILD_TIMEOUT * 2);
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public static void main(String[] args) throws Throwable {
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if (args.length == 0 || args[0].equals("parent")) {
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parentProcess();
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}
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if (args.length > 0 && args[0].equals("child")) {
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childProcess();
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}
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}
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private static void parentProcess() throws Throwable {
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JDKToolLauncher launcher = JDKToolLauncher
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.createUsingTestJDK("java")
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.addToolArg("MultiDead")
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.addToolArg("child");
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ProcessBuilder pb = new ProcessBuilder(launcher.getCommand());
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AtomicReference<Process> child = new AtomicReference<>();
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AtomicBoolean stopFlag = new AtomicBoolean(false);
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Thread th = new Thread(() -> {
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for (int i = 0; i < CHILDREN_COUNT; ++i) {
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System.out.println("child #" + (i + 1) + " of " +
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CHILDREN_COUNT);
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long start = System.nanoTime();
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try {
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child.set(pb.start());
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child.get().waitFor();
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if (stopFlag.get()) {
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break;
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}
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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if (System.nanoTime() - start >
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MILLISECONDS.toNanos(CHILD_TIMEOUT)) {
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System.err.println("Machine is too slow, " +
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"skipping the test...");
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break;
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}
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}
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});
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th.start();
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th.join(TIMEOUT);
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stopFlag.set(true);
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if (th.isAlive()) {
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if (child.get() != null) {
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child.get().destroyForcibly();
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}
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throw new RuntimeException("Failed to complete on time.");
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}
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}
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private static void childProcess() {
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CountDownLatch latch = new CountDownLatch(1);
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for (int i = 0; i < THREAD_PAIR_COUNT; ++i) {
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new Thread(() -> {
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try {
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latch.await();
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try (MulticastSocket a = new MulticastSocket(6000)) {
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}
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} catch (Exception ignore) {
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}
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}).start();
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new Thread(() -> {
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try {
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latch.await();
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try (DatagramSocket b = new DatagramSocket(6000)) {
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}
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} catch (Exception ignore) {
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}
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}).start();
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}
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latch.countDown();
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}
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}
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