StressObjectArrayCopy.java

/*
 * Copyright (c) 2021, 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.
 *
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package compiler.arraycopy.stress;

import java.util.Arrays;
import java.util.Random;
import jdk.test.lib.Utils;

public class StressObjectArrayCopy extends AbstractStressArrayCopy {

    private static final Object[] orig = new Object[MAX_SIZE];
    private static final Object[] test = new Object[MAX_SIZE];

    protected void testWith(int size, int l, int r, int len) {
        // Seed the test from the original
        System.arraycopy(orig, 0, test, 0, size);

        // Check the seed is correct
        {
            int m = Arrays.mismatch(test, 0, size,
                                    orig, 0, size);
            if (m != -1) {
                throwSeedError(size, m);
            }
        }

        // Perform the tested copy
        System.arraycopy(test, l, test, r, len);

        // Check the copy has proper contents
        {
            int m = Arrays.mismatch(test, r, r+len,
                                    orig, l, l+len);
            if (m != -1) {
                throwContentsError(l, r, len, r+m);
            }
        }

        // Check anything else was not affected: head and tail
        {
            int m = Arrays.mismatch(test, 0, r,
                                    orig, 0, r);
            if (m != -1) {
                throwHeadError(l, r, len, m);
            }
        }
        {
            int m = Arrays.mismatch(test, r + len, size,
                                    orig, r + len, size);
            if (m != -1) {
                throwTailError(l, r, len, m);
            }
        }
    }

    public static void main(String... args) {
        Random rand = Utils.getRandomInstance();
        for (int c = 0; c < orig.length; c++) {
            orig[c] = new Object();
        }
        new StressObjectArrayCopy().run(rand);
    }

}