108 lines
3.4 KiB
Java
108 lines
3.4 KiB
Java
/*
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* Copyright (c) 2003, 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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/* @test
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* @bug 4499763
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* @summary Check for race condition between close and available
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*/
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import java.io.*;
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/*
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* Note: this is a probabalistic test and will not always fail on
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* a workspace where the race condition can occur. However it should
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* never fail on a workspace where the bug has been fixed.
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*/
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public class CloseAndAvailableRC {
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public static void main(final String[] args) throws Exception {
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CloseAndAvailableRC rc = new CloseAndAvailableRC();
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rc.go();
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}
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private PipedInputStream inPipe = null;
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private PipedOutputStream outPipe = null;
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private Thread sink = null;
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private volatile boolean stop = false;
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private volatile boolean stopTest = false;
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private void go() throws Exception {
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for (long i=0; i<2000; i++) {
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if (stopTest) {
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cleanup();
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throw new RuntimeException("Test failed");
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}
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resetPipes();
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System.err.println("Closing...");
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inPipe.close();
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}
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cleanup();
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}
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// Cleanup old threads
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private void cleanup() throws Exception {
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if (sink != null) {
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stop = true;
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sink.interrupt();
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try {
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sink.join();
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} catch (InterruptedException e) {
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}
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stop = false;
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// Input Stream will have been closed already
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outPipe.close();
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}
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}
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private void resetPipes() throws Exception {
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cleanup();
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// Init pipe; Note: output never read
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inPipe = new PipedInputStream();
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outPipe = new PipedOutputStream(inPipe);
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// Put stuff in pipe so that available() > 0
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for (byte b = 0; b < 10; b++)
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outPipe.write(b);
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sink = new Sink();
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sink.start();
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}
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private class Sink extends Thread {
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public void run() {
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while (!stop) {
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try {
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final int num = inPipe.available();
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if (num < 0) {
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// Bug detected; stop the test
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stopTest = true;
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}
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} catch (final IOException e) {
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System.err.println("Error on available:" + e.getMessage());
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e.printStackTrace(System.err);
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}
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}
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}
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}
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}
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