/*

 * Copyright (c) 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

 * @bug 8161720

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

 * @run main/othervm -Xint UnsafeOnHeapBooleanTest 1

 * @run main/othervm -XX:-UseOnStackReplacement -XX:+TieredCompilation -XX:TieredStopAtLevel=3 -Xbatch UnsafeOnHeapBooleanTest 20000

 * @run main/othervm -XX:-UseOnStackReplacement -XX:-TieredCompilation -Xbatch UnsafeOnHeapBooleanTest 20000

 */

import java.lang.reflect.Field;

import jdk.internal.misc.Unsafe;

public class UnsafeOnHeapBooleanTest {

    static short static_v;

    static boolean bool0 = false, bool1 = false, result = false;

    static Unsafe UNSAFE = Unsafe.getUnsafe();

    public static void test() {

        try {

            // Write two bytes into the static field

            // UnsafeOnHeapBooleanTest.static_v write two values. Both

            // bytes correspond to the boolean value 'true'.

            Field staticVField = UnsafeOnHeapBooleanTest.class.getDeclaredField("static_v");

            Object base = UNSAFE.staticFieldBase(staticVField);

            long offset = UNSAFE.staticFieldOffset(staticVField);

            UNSAFE.putShort(base, offset, (short)0x0204);

            // Read two bytes from the static field

            // UnsafeOnHeapBooleanTest.static_v (as booleans).

            bool0 = UNSAFE.getBoolean(base, offset + 0);

            bool1 = UNSAFE.getBoolean(base, offset + 1);

            result = bool0 & bool1;

        } catch (NoSuchFieldException e) {

            throw new RuntimeException("### Test failure: static field UnsafeOnHeapBooleanTest.static_v was not found");

        }

    }

    public static void main(String args[]) {

        System.out.println("### Test started");

        if (args.length != 1) {

            throw new RuntimeException("### Test failure: test called with incorrect number of arguments");

        }

        try {

            for (int i = 0; i < Integer.parseInt(args[0]); i++) {

                test();

            }

            // Check if the two 'true' boolean values were normalized

            // (i.e., reduced from the range 1...255 to 1).

            if (!bool0 || !bool1 || !result) {

                System.out.println("Some of the results below are wrong");

                System.out.println("bool0 is: " + bool0);

                System.out.println("bool1 is: " + bool1);

                System.out.println("bool0 & bool1 is: " + result);

                System.out.println("===================================");

                throw new RuntimeException("### Test failed");

            } else {

                System.out.println("Test generated correct results");

                System.out.println("bool0 is: " + bool0);

                System.out.println("bool1 is: " + bool1);

                System.out.println("bool0 & bool1 is: " + result);

                System.out.println("===================================");

            }

        } catch (NumberFormatException e) {

            throw new RuntimeException("### Test failure: test called with incorrectly formatted parameter");

        }

        System.out.println("### Test passed");

    }

}