1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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
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  23 
  24 
  25 /**
  26  * @test
  27  * @bug 8185164
  28  * @summary Verifies the JVMTI GetOwnedMonitorInfo API does not show up any monitor at MonitorContendedEnter JVMTI event.
  29  * @modules jdk.jdi
  30  * @compile GetOwnedMonitorInfoTest.java
  31  * @run main/othervm/native -agentlib:GetOwnedMonitorInfoTest GetOwnedMonitorInfoTest
  32  */
  33 
  34 import java.io.PrintStream;
  35 
  36 public class GetOwnedMonitorInfoTest {
  37 
  38     static {
  39         try {
  40             System.loadLibrary("GetOwnedMonitorInfoTest");
  41         } catch (UnsatisfiedLinkError ule) {
  42             System.err.println("Could not load GetOwnedMonitorInfoTest library");
  43             System.err.println("java.library.path: "
  44                                + System.getProperty("java.library.path"));
  45             throw ule;
  46         }
  47     }
  48 
  49     private static native int check();
  50     private static native boolean hasEventPosted();
  51 
  52     public static void main(String[] args) throws Exception {
  53         final GetOwnedMonitorInfoTest lock = new GetOwnedMonitorInfoTest();
  54 
  55         Thread t1 = new Thread(() -> {
  56             synchronized (lock) {
  57                 System.out.println("Thread in sync section: "
  58                                    + Thread.currentThread().getName());
  59             }
  60         });
  61 
  62         // Make sure t1 contends on the monitor.
  63         synchronized (lock) {
  64             System.out.println("Main starting worker thread.");
  65             t1.start();
  66 
  67             // Wait for the MonitorContendedEnter event
  68             while (!hasEventPosted()) {
  69                 System.out.println("Main waiting for event.");
  70                 Thread.sleep(100);
  71             }
  72         }
  73 
  74         t1.join();
  75 
  76         if (check() != 0) {
  77             throw new RuntimeException("FAILED status returned from the agent");
  78         }
  79     }
  80 }