/*

 * Copyright (c) 2018, Google 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.

 */

package MyPackage;

/**

 * @test

 * @build Frame HeapMonitor ThreadInformation

 * @summary Verifies the JVMTI Heap Monitor Thread information sanity.

 * @compile HeapMonitorThreadTest.java

 * @run main/othervm/native -Xmx512m -agentlib:HeapMonitorTest MyPackage.HeapMonitorThreadTest

 * @requires !vm.gc.Z

 */

import java.util.List;

public class HeapMonitorThreadTest {

  private native static boolean checkSamples(int numThreads);

  public static void main(String[] args) {

    final int numThreads = 5;

    List<ThreadInformation> threadList = ThreadInformation.createThreadList(numThreads);

    // Sample at a rate of 8k.

    HeapMonitor.setSamplingRate(1 << 13);

    HeapMonitor.enableSamplingEvents();

    System.err.println("Starting threads");

    ThreadInformation.startThreads(threadList);

    ThreadInformation.waitForThreads(threadList);

    System.err.println("Waited for threads");

    if (!checkSamples(numThreads)) {

      throw new RuntimeException("Problem with checkSamples...");

    }

    // Now inform each thread we are done and wait for them to be done.

    ThreadInformation.stopThreads(threadList);

  }

}