1 /*
   2  * Copyright (c) 2018, Google 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 package MyPackage;
  25 
  26 /**
  27  * @test
  28  * @build Frame HeapMonitor ThreadInformation
  29  * @summary Ensures the JVMTI Heap Monitor is not thread enable (test to change when it becomes so)
  30  * @compile HeapMonitorEventsForTwoThreadsTest.java
  31  * @run main/othervm/native -agentlib:HeapMonitorTest MyPackage.HeapMonitorEventsForTwoThreadsTest
  32  */
  33 
  34 import java.util.List;
  35 
  36 public class HeapMonitorEventsForTwoThreadsTest {
  37   public native static boolean checkSamples();
  38 
  39   public static void main(String[] args) {
  40     final int numThreads = 24;
  41     List<ThreadInformation> threadList = ThreadInformation.createThreadList(numThreads);
  42 
  43     Thread firstThread = threadList.get(0).getThread();
  44     Thread secondThread = threadList.get(1).getThread();
  45     if (HeapMonitor.enableSamplingEventsForTwoThreads(firstThread, secondThread)) {
  46       throw new RuntimeException("Sampling event is thread enabled, that is unexpected.");
  47     }
  48   }
  49 }