| /* |
| * 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(); |
| } |
| } |