/*

 * 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

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 */

/**

 * @test TestObjects

 * @key gc

 * @requires vm.gc.Epsilon

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

 *

 * @run main/othervm -Xmx128m                                        -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

 * @run main/othervm -Xmx128m -Xint                                  -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

 * @run main/othervm -Xmx128m -Xbatch -Xcomp                         -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

 * @run main/othervm -Xmx128m -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

 *

 * @run main/othervm -Xmx128m                                        -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

 * @run main/othervm -Xmx128m -Xint                                  -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

 * @run main/othervm -Xmx128m -Xbatch -Xcomp                         -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

 * @run main/othervm -Xmx128m -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

 */

import java.util.Random;

public class TestObjects {

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

  static int COUNT = Integer.getInteger("count", 1_000_000); // ~24 MB allocation

  static MyObject[] arr;

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

    Random r = new Random(SEED);

    arr = new MyObject[COUNT];

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

      arr[c] = new MyObject(r.nextInt());

    }

    r = new Random(SEED);

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

      int expected = r.nextInt();

      int actual = arr[c].id();

      if (expected != actual) {

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

      }

    }

  }

  public static class MyObject {

    int id;

    public MyObject(int id) {

      this.id = id;

    }

    public int id() {

      return id;

    }

  }

}