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Datei: ExclusiveBind.java Sprache: JAVA

/*
* Copyright (c) 2003, 2018, 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 4531526
* @summary Test that more than one debuggee cannot bind to same port
*          at the same time.
* @library /test/lib
*
* @build ExclusiveBind HelloWorld
* @run driver ExclusiveBind
*/

import jdk.test.lib.process.ProcessTools;
import lib.jdb.Debuggee;

public class ExclusiveBind {
    /*
     * - Launch a debuggee with server=y,suspend=y
     * - Parse listening port
     * - Launch a second debuggee in server=y,suspend=n with the parsed port
     * - Second debuggee should fail with an error (address already in use)
     * - For clean-up we attach to the first debuggee and resume it.
     */
    public static void main(String args[]) throws Exception {
        // launch the first debuggee
        try (Debuggee process1 = Debuggee.launcher("HelloWorld").launch("process1")) {
            // launch a second debuggee with the same address
            ProcessBuilder process2 = Debuggee.launcher("HelloWorld")
                    .setSuspended(false)
                    .setAddress(process1.getAddress())
                    .prepare();

            // get exit status from second debuggee
            int exitCode = ProcessTools.startProcess("process2", process2).waitFor();

            // if the second debuggee ran to completion then we've got a problem
            if (exitCode == 0) {
                throw new RuntimeException("Test failed - second debuggee didn't fail to bind");
            } else {
                System.out.println("Test passed - second debuggee correctly failed to bind");
            }
        }
    }
}

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