1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2018, Google and/or its affiliates. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  */
  24 
  25 package MyPackage;
  26 
  27 /**
  28  * @test
  29  * @build Frame HeapMonitor ThreadInformation
  30  * @summary Ensures the JVMTI Heap Monitor is not thread enable (test to change when it becomes so)
  31  * @compile HeapMonitorEventsForTwoThreadsTest.java
  32  * @run main/othervm/native -agentlib:HeapMonitorTest MyPackage.HeapMonitorEventsForTwoThreadsTest
  33  */
  34 
  35 import java.util.List;
  36 
  37 public class HeapMonitorEventsForTwoThreadsTest {
  38   public native static boolean checkSamples();
  39 
  40   public static void main(String[] args) {
  41     final int numThreads = 24;
  42     List<ThreadInformation> threadList = ThreadInformation.createThreadList(numThreads);
  43 
  44     Thread firstThread = threadList.get(0).getThread();
  45     Thread secondThread = threadList.get(1).getThread();
  46     if (HeapMonitor.enableSamplingEventsForTwoThreads(firstThread, secondThread)) {
  47       throw new RuntimeException("Sampling event is thread enabled, that is unexpected.");
  48     }
  49   }
  50 }