/*

 * Copyright (c) 2015, Oracle 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.

 *

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 */

/*

 * @test TestDynamicNumberOfGCThreads

 * @bug 8017462

 * @summary Ensure that UseDynamicNumberOfGCThreads runs

 * @requires vm.gc=="null"

 * @key gc

 * @library /testlibrary

 */

import com.oracle.java.testlibrary.ProcessTools;

import com.oracle.java.testlibrary.OutputAnalyzer;

public class TestDynamicNumberOfGCThreads {

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

    testDynamicNumberOfGCThreads("UseConcMarkSweepGC");

    testDynamicNumberOfGCThreads("UseG1GC");

    testDynamicNumberOfGCThreads("UseParallelGC");

  }

  private static void verifyDynamicNumberOfGCThreads(OutputAnalyzer output) {

    output.shouldContain("new_active_workers");

  }

  private static void testDynamicNumberOfGCThreads(String gcFlag) throws Exception {

    // UseDynamicNumberOfGCThreads and TraceDynamicGCThreads enabled

    verifyDynamicNumberOfGCThreads(new OutputAnalyzer(pb_enabled.start()));

  }

  static class GCTest {

    private static byte[] garbage;

    public static void main(String [] args) {

      System.out.println("Creating garbage");

      // create 128MB of garbage. This should result in at least one GC

      for (int i = 0; i < 1024; i++) {

        garbage = new byte[128 * 1024];

      }

      System.out.println("Done");

    }

  }

}