/*

 * Copyright (c) 2014, 2015, 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

 * @bug 6653795

 * @summary C2 intrinsic for Unsafe.getAddress performs pointer sign extension on 32-bit systems

 * @modules java.base/jdk.internal.misc:+open

 *

 * @run main compiler.intrinsics.unsafe.UnsafeGetAddressTest

 */

package compiler.intrinsics.unsafe;

import jdk.internal.misc.Unsafe;

import java.lang.reflect.Field;

public class UnsafeGetAddressTest {

    private static Unsafe unsafe;

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

        Class c = UnsafeGetAddressTest.class.getClassLoader().loadClass("jdk.internal.misc.Unsafe");

        Field f = c.getDeclaredField("theUnsafe");

        f.setAccessible(true);

        unsafe = (Unsafe)f.get(c);

        long address = unsafe.allocateMemory(unsafe.addressSize());

        unsafe.putAddress(address, 0x0000000080000000L);

        // from jdk.internal.misc.Unsafe.getAddress' documentation:

        // "If the native pointer is less than 64 bits wide, it is

        // extended as an unsigned number to a Java long."

        result = unsafe.getAddress(address);

        System.out.printf("1: was 0x%x, expected 0x%x\n", result,

                0x0000000080000000L);

        for (int i = 0; i < 1000000; i++) {

            result = unsafe.getAddress(address);

        }

        // The code has got compiled, check the result now

        System.out.printf("2: was 0x%x, expected 0x%x\n", result,

                0x0000000080000000L);

        if (result != 0x0000000080000000L) {

            System.out.println("Test Failed");

            System.exit(97);

        } else {

            System.out.println("Test Passed");

        }

    }

    static volatile long result;

}