1 /*

     2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 

    25 /**

    26  * @test

    27  * @bug 8185164

    28  * @summary Checks that a contended monitor does not show up in the list of owned monitors

    29  * @compile GetOwnedMonitorInfoTest.java

    30  * @run main/othervm/native -agentlib:GetOwnedMonitorInfoTest GetOwnedMonitorInfoTest

    31  */

    32 

    33 import java.io.PrintStream;

    34 

    35 public class GetOwnedMonitorInfoTest {

    36 

    37     static {

    38         try {

    39             System.loadLibrary("GetOwnedMonitorInfoTest");

    40         } catch (UnsatisfiedLinkError ule) {

    41             System.err.println("Could not load GetOwnedMonitorInfoTest library");

    42             System.err.println("java.library.path: "

    43                                + System.getProperty("java.library.path"));

    44             throw ule;

    45         }

    46     }

    47 

    48     private static native int check();

    49     private static native boolean hasEventPosted();

    50 

    51     public static void main(String[] args) throws Exception {

    52         final GetOwnedMonitorInfoTest lock = new GetOwnedMonitorInfoTest();

    53 

    54         Thread t1 = new Thread(() -> {

    55             synchronized (lock) {

    56                 System.out.println("Thread in sync section: "

    57                                    + Thread.currentThread().getName());

    58             }

    59         });

    60 

    61         // Make sure t1 contends on the monitor.

    62         synchronized (lock) {

    63             System.out.println("Main starting worker thread.");

    64             t1.start();

    65 

    66             // Wait for the MonitorContendedEnter event

    67             while (!hasEventPosted()) {

    68                 System.out.println("Main waiting for event.");

    69                 Thread.sleep(100);

    70             }

    71         }

    72 

    73         t1.join();

    74 

    75         if (check() != 0) {

    76             throw new RuntimeException("FAILED status returned from the agent");

    77         }

    78     }

    79 }