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Datei: JdbLockTest.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 4847812
* @summary TTY: jdb lock command displays incorrect data
* @comment converted from test/jdk/com/sun/jdi/JdbLockTest.sh
*
* @library /test/lib
* @compile -g JdbLockTest.java
* @run main/othervm JdbLockTest
*/

import lib.jdb.JdbCommand;
import lib.jdb.JdbTest;

class JdbLockTestTarg {
    static String jj = "jj";
    public static void main(String args[]) {
        synchronized(jj) {
            sleeper xx = new sleeper();
            xx.start();
            // Give the sleeper a chance to run and get to
            // the synchronized statement.
            while(sleeper.started == 0) {
                try {
                    Thread.sleep(100);
                } catch(InterruptedException ee) {
                }
            }
            // At this bkpt, sleeper should be waiting on $classname.jj
            System.out.println("Hello sailor");    // @1 breakpoint
        }
    }
}

class sleeper extends Thread {
    public static int started = 0;
    public void run() {
        started = 1;
        System.out.println(" sleeper starts sleeping");
        synchronized(JdbLockTestTarg.jj) {
            System.out.println(" sleeper got the lock");
        }
        System.out.println(" sleeper awakes");
    }
}

public class JdbLockTest extends JdbTest {
    public static void main(String argv[]) {
        new JdbLockTest().run();
    }

    private JdbLockTest() {
        super(DEBUGGEE_CLASS);
    }

    private static final String DEBUGGEE_CLASS = JdbLockTestTarg.class.getName();

    @Override
    protected void runCases() {
        setBreakpointsFromTestSource("JdbLockTest.java", 1);
        // Run to breakpoint #1
        jdb.command(JdbCommand.run());

        // This should say that main owns the lock
        // and the sleeper thread is waiting for it.
        execCommand(JdbCommand.lock("JdbLockTestTarg.jj"))
                .shouldNotContain("Waiting thread: main");
    }
}

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