/*

 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. 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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 */

/*

 * @test

 * Verify behaviour of Unsafe.get/putAddress and Unsafe.addressSize

 * @library /test/lib

 * @modules java.base/jdk.internal.misc

 *          java.management

 * @run main GetPutAddress

 */

import jdk.test.lib.Platform;

import jdk.internal.misc.Unsafe;

import static jdk.test.lib.Asserts.*;

public class GetPutAddress {

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

        int addressSize = unsafe.addressSize();

        // Ensure the size returned from Unsafe.addressSize is correct

        assertEquals(unsafe.addressSize(), Platform.is32bit() ? 4 : 8);

        // Write the address, read it back and make sure it's the same value

        long address = unsafe.allocateMemory(addressSize);

        unsafe.putAddress(address, address);

        long readAddress = unsafe.getAddress(address);

        if (addressSize == 4) {

          readAddress &= 0x00000000FFFFFFFFL;

        }

        assertEquals(address, readAddress);

        unsafe.freeMemory(address);

    }

}