/*

 * Copyright (c) 2019, Huawei Technologies Co. Ltd. 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

 * @bug 8202414

 * @summary Unsafe write after primitive array creation may result in array length change

 * @requires (os.arch != "sparc") & (os.arch != "sparcv9")

 * @run main/othervm compiler.c2.Test8202414

 */

package compiler.c2;

import sun.misc.Unsafe;

import java.lang.reflect.Field;

import java.security.AccessController;

import java.security.PrivilegedAction;

public class Test8202414 {

    public static void main(String[] args) {

        System.err.close();

        int count = 0;

        while (count++ < 120000) {

          test();

        }

    }

    public static void test() {

        byte[] newBufb = serByte(397);

        short[] newBufs = serShort(397);

        int[] newBufi = serInt(397);

        long[] newBufl = serLong(397);

        if (newBufb.length != 397 || newBufs.length != 397

            || newBufi.length != 397 || newBufl.length != 397) {

            System.out.println("array length internal error");

            throw new RuntimeException("Test failed");

        }

    }

    public static byte[] serByte(int bufLen) {

        byte[] buf = new byte[bufLen];

        THE_UNSAFE.putByte(buf, BYTE_ARRAY_BASE_OFFSET + 1, (byte) buf.length);

        System.err.println("ref " + buf);

        return buf;

    }

    public static short[] serShort(int bufLen) {

        short[] buf = new short[bufLen];

        THE_UNSAFE.putShort(buf, SHORT_ARRAY_BASE_OFFSET + 1, (short) buf.length);

        System.err.println("ref " + buf);

        return buf;

    }

    public static int[] serInt(int bufLen) {

        int[] buf = new int[bufLen];

        THE_UNSAFE.putInt(buf, INT_ARRAY_BASE_OFFSET + 1, buf.length);

        System.err.println("ref " + buf);

        return buf;

    }

    public static long[] serLong(int bufLen) {

        long[] buf = new long[bufLen];

        THE_UNSAFE.putLong(buf, LONG_ARRAY_BASE_OFFSET + 1, buf.length);

        System.err.println("ref " + buf);

        return buf;

    }

    /* Unsafe fields and initialization

     */

    static final Unsafe THE_UNSAFE;

    static final long BYTE_ARRAY_BASE_OFFSET;

    static final long SHORT_ARRAY_BASE_OFFSET;

    static final long INT_ARRAY_BASE_OFFSET;

    static final long LONG_ARRAY_BASE_OFFSET;

    static {

        THE_UNSAFE = (Unsafe) AccessController.doPrivileged (

            new PrivilegedAction<Object>() {

                @Override

                public Object run() {

                    try {

                        Field f = Unsafe.class.getDeclaredField("theUnsafe");

                        f.setAccessible(true);

                        return f.get(null);

                    } catch (NoSuchFieldException | IllegalAccessException e) {

                        throw new Error();

                    }

                }

            }

        );

        BYTE_ARRAY_BASE_OFFSET = THE_UNSAFE.arrayBaseOffset(byte[].class);

        SHORT_ARRAY_BASE_OFFSET = THE_UNSAFE.arrayBaseOffset(short[].class);

        INT_ARRAY_BASE_OFFSET = THE_UNSAFE.arrayBaseOffset(int[].class);

        LONG_ARRAY_BASE_OFFSET = THE_UNSAFE.arrayBaseOffset(long[].class);

    }

}