123 lines
3.7 KiB
Java
123 lines
3.7 KiB
Java
/*
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* Copyright (c) 2024, 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 8336339
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* @summary Race registration and selection key updates with Selector.close
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* @run junit RaceUpdatesAndClose
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*/
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import java.nio.channels.CancelledKeyException;
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import java.nio.channels.ClosedSelectorException;
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import java.nio.channels.DatagramChannel;
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import java.nio.channels.SelectionKey;
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import java.nio.channels.Selector;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.Phaser;
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import org.junit.jupiter.api.BeforeAll;
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import org.junit.jupiter.api.AfterAll;
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import org.junit.jupiter.api.RepeatedTest;
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class RaceUpdatesAndClose {
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private static ExecutorService executor;
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@BeforeAll
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static void setup() throws Exception {
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executor = Executors.newFixedThreadPool(2);
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}
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@AfterAll
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static void finish() {
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executor.shutdown();
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}
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/**
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* Race SelectableChannel.register and Selector.close.
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*/
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@RepeatedTest(100)
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void raceRegisterAndClose() throws Exception {
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try (Selector sel = Selector.open();
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DatagramChannel dc = DatagramChannel.open()) {
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dc.configureBlocking(false);
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Phaser phaser = new Phaser(2);
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// register
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var task1 = executor.submit(() -> {
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phaser.arriveAndAwaitAdvance();
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try {
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dc.register(sel, SelectionKey.OP_READ);
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} catch (ClosedSelectorException e) { }
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return null;
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});
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// close selector
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var task2 = executor.submit(() -> {
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phaser.arriveAndAwaitAdvance();
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sel.close();
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return null;
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});
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task1.get();
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task2.get();
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}
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}
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/**
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* Race SelectionKey.interestOps and Selector.close.
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*/
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@RepeatedTest(100)
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void raceInterestOpsAndClose() throws Exception {
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try (Selector sel = Selector.open();
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DatagramChannel dc = DatagramChannel.open()) {
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dc.configureBlocking(false);
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SelectionKey key = dc.register(sel, SelectionKey.OP_READ);
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Phaser phaser = new Phaser(2);
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// interestOps
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var task1 = executor.submit(() -> {
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phaser.arriveAndAwaitAdvance();
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try {
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key.interestOps(0);
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} catch (CancelledKeyException e) { }
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});
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// close selector
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var task2 = executor.submit(() -> {
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phaser.arriveAndAwaitAdvance();
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sel.close();
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return null;
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});
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task1.get();
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task2.get();
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}
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}
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}
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