/*

 * Copyright (c) 2017, 2018, Red Hat, Inc. 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.

 */

/**

 * @test TestByteArrays

 * @key gc

 * @requires vm.gc.Epsilon

 * @summary Epsilon is able to allocate arrays, and does not corrupt their state

 *

 * @run main/othervm -Xmx1g                                        -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestByteArrays

 * @run main/othervm -Xmx1g -Xint                                  -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestByteArrays

 * @run main/othervm -Xmx1g -Xbatch -Xcomp                         -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestByteArrays

 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestByteArrays

 *

 * @run main/othervm -Xmx1g                                        -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestByteArrays

 * @run main/othervm -Xmx1g -Xint                                  -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestByteArrays

 * @run main/othervm -Xmx1g -Xbatch -Xcomp                         -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestByteArrays

 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestByteArrays

 */

import java.util.Random;

public class TestByteArrays {

  static long SEED = Long.getLong("seed", System.nanoTime());

  static int COUNT = Integer.getInteger("count", 3000); // ~500 MB allocation

  static byte[][] arr;

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

    Random r = new Random(SEED);

    arr = new byte[COUNT * 100][];

    for (int c = 0; c < COUNT; c++) {

      arr[c] = new byte[c * 100];

      for (int v = 0; v < c; v++) {

        arr[c][v] = (byte)(r.nextInt(255) & 0xFF);

      }

    }

    r = new Random(SEED);

    for (int c = 0; c < COUNT; c++) {

      byte[] b = arr[c];

      if (b.length != (c * 100)) {

        throw new IllegalStateException("Failure: length = " + b.length + ", need = " + (c*100));

      }

      for (int v = 0; v < c; v++) {

        byte actual = b[v];

        byte expected = (byte)(r.nextInt(255) & 0xFF);

        if (actual != expected) {

          throw new IllegalStateException("Failure: expected = " + expected + ", actual = " + actual);

        }

      }

    }

  }

}