0N/A/*
2362N/A * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/A/* @test
0N/A * @bug 4499763
0N/A * @summary Check for race condition between close and available
0N/A */
0N/A
0N/Aimport java.io.*;
0N/A
0N/A/*
0N/A * Note: this is a probabalistic test and will not always fail on
0N/A * a workspace where the race condition can occur. However it should
0N/A * never fail on a workspace where the bug has been fixed.
0N/A */
0N/Apublic class CloseAndAvailableRC {
0N/A public static void main(final String[] args) throws Exception {
0N/A CloseAndAvailableRC rc = new CloseAndAvailableRC();
0N/A rc.go();
0N/A }
0N/A
0N/A private PipedInputStream inPipe = null;
0N/A private PipedOutputStream outPipe = null;
0N/A private Thread sink = null;
0N/A private volatile boolean stop = false;
0N/A private volatile boolean stopTest = false;
0N/A
0N/A private void go() throws Exception {
0N/A for (long i=0; i<2000; i++) {
0N/A if (stopTest) {
0N/A cleanup();
0N/A throw new RuntimeException("Test failed");
0N/A }
0N/A resetPipes();
0N/A System.err.println("Closing...");
0N/A inPipe.close();
0N/A }
0N/A cleanup();
0N/A }
0N/A
0N/A // Cleanup old threads
0N/A private void cleanup() throws Exception {
0N/A if (sink != null) {
0N/A stop = true;
0N/A sink.interrupt();
0N/A try {
0N/A sink.join();
0N/A } catch (InterruptedException e) {
0N/A }
0N/A stop = false;
0N/A // Input Stream will have been closed already
0N/A outPipe.close();
0N/A }
0N/A }
0N/A
0N/A private void resetPipes() throws Exception {
0N/A cleanup();
0N/A
0N/A // Init pipe; Note: output never read
0N/A inPipe = new PipedInputStream();
0N/A outPipe = new PipedOutputStream(inPipe);
0N/A
0N/A // Put stuff in pipe so that available() > 0
0N/A for (byte b = 0; b < 10; b++)
0N/A outPipe.write(b);
0N/A
0N/A sink = new Sink();
0N/A sink.start();
0N/A }
0N/A
0N/A private class Sink extends Thread {
0N/A public void run() {
0N/A while (!stop) {
0N/A try {
0N/A final int num = inPipe.available();
0N/A if (num < 0) {
0N/A // Bug detected; stop the test
0N/A stopTest = true;
0N/A }
0N/A } catch (final IOException e) {
0N/A System.err.println("Error on available:" + e.getMessage());
0N/A e.printStackTrace(System.err);
0N/A }
0N/A }
0N/A }
0N/A }
0N/A}