/*

 * Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved.

 *

 * 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

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 */

/* @test TestJNICritical

 * @summary test JNI critical arrays support in Shenandoah

 * @key gc

 * @requires vm.gc.Shenandoah

 *

 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:+ShenandoahVerify                 TestJNICritical

 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive TestJNICritical

 */

import java.util.Arrays;

public class TestJNICritical {

    static {

        System.loadLibrary("TestJNICritical");

    }

    private static final int NUM_RUNS   = 10000;

    private static final int ARRAY_SIZE = 10000;

    private static int[] a;

    private static int[] b;

    private static native void copyAtoB(int[] a, int[] b);

    public static void main(String[] args) {

        a = new int[ARRAY_SIZE];

        b = new int[ARRAY_SIZE];

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

            test();

        }

    }

    private static void test() {

        int[] a1 = new int[ARRAY_SIZE];

        int[] b1 = new int[ARRAY_SIZE];

        fillArray(a);

        copyAtoB(a, b);

        copyAtoB(a1, b1); // Don't optimize out garbage arrays.

        if (!Arrays.equals(a, b)) {

            throw new RuntimeException("arrays not equal");

        }

    }

    private static void fillArray(int[] array) {

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

            int val = (int) (Math.random() * Integer.MAX_VALUE);

            array[i] = val;

        }

    }

}