/*

 * Copyright (c) 2019, 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.

 *

 * 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 8216549

 * @summary Mismatched unsafe access to non escaping object fails

 *

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

 * @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation MismatchedUnsafeLoadFromNewObject

 */

import java.lang.reflect.Field;

import jdk.internal.misc.Unsafe;

public class MismatchedUnsafeLoadFromNewObject {

    public volatile int f_int = -1;

    public volatile int f_int2 = -1;

    public static Unsafe unsafe = Unsafe.getUnsafe();

    public static final long f_int_off;

    public static final long f_int2_off;

    static {

        Field f_int_field = null;

        Field f_int2_field = null;

        try {

            f_int_field = MismatchedUnsafeLoadFromNewObject.class.getField("f_int");

            f_int2_field = MismatchedUnsafeLoadFromNewObject.class.getField("f_int2");

        } catch (Exception e) {

            System.out.println("reflection failed " + e);

            e.printStackTrace();

        }

        f_int_off = unsafe.objectFieldOffset(f_int_field);

        f_int2_off = unsafe.objectFieldOffset(f_int2_field);

    }

    static public void main(String[] args) {

        for (int i = 0; i < 20_000; i++) {

            byte res = test1();

            if (res != -1) {

                throw new RuntimeException("Incorrect result: " + res);

            }

            res = test2();

            if (res != -1) {

                throw new RuntimeException("Incorrect result: " + res);

            }

            int res2 = test3();

            if (res2 != -1) {

                throw new RuntimeException("Incorrect result: " + res2);

            }

        }

    }

    static byte test1() {

        MismatchedUnsafeLoadFromNewObject t = new MismatchedUnsafeLoadFromNewObject();

        return unsafe.getByte(t, f_int_off);

    }

    static byte test2() {

        MismatchedUnsafeLoadFromNewObject t = new MismatchedUnsafeLoadFromNewObject();

        return unsafe.getByte(t, f_int_off+1);

    }

    static int test3() {

        MismatchedUnsafeLoadFromNewObject t = new MismatchedUnsafeLoadFromNewObject();

        if (f_int_off < f_int2_off) {

            return unsafe.getIntUnaligned(t, f_int_off+1);

        } else {

            return unsafe.getIntUnaligned(t, f_int2_off+1);

        }

    }

}