/*

 * Copyright (c) 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.

 *

 * 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 8143628

 * @summary Test unsafe access for long

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

 * @run testng/othervm -Diters=100   -Xint                   JdkInternalMiscUnsafeAccessTestLong

 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 JdkInternalMiscUnsafeAccessTestLong

 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation  JdkInternalMiscUnsafeAccessTestLong

 * @run testng/othervm -Diters=20000                         JdkInternalMiscUnsafeAccessTestLong

 */

import org.testng.annotations.Test;

import java.lang.reflect.Field;

import static org.testng.Assert.*;

public class JdkInternalMiscUnsafeAccessTestLong {

    static final int ITERS = Integer.getInteger("iters", 1);

    static final jdk.internal.misc.Unsafe UNSAFE;

    static final long V_OFFSET;

    static final Object STATIC_V_BASE;

    static final long STATIC_V_OFFSET;

    static int ARRAY_OFFSET;

    static int ARRAY_SHIFT;

    static {

        try {

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

            f.setAccessible(true);

            UNSAFE = (jdk.internal.misc.Unsafe) f.get(null);

        } catch (Exception e) {

            throw new RuntimeException("Unable to get Unsafe instance.", e);

        }

        try {

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

            STATIC_V_BASE = UNSAFE.staticFieldBase(staticVField);

            STATIC_V_OFFSET = UNSAFE.staticFieldOffset(staticVField);

        } catch (Exception e) {

            throw new RuntimeException(e);

        }

        try {

            Field vField = JdkInternalMiscUnsafeAccessTestLong.class.getDeclaredField("v");

            V_OFFSET = UNSAFE.objectFieldOffset(vField);

        } catch (Exception e) {

            throw new RuntimeException(e);

        }

        ARRAY_OFFSET = UNSAFE.arrayBaseOffset(long[].class);

        int ascale = UNSAFE.arrayIndexScale(long[].class);

        ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);

    }

    static long static_v;

    long v;

    @Test

    public void testFieldInstance() {

        JdkInternalMiscUnsafeAccessTestLong t = new JdkInternalMiscUnsafeAccessTestLong();

        for (int c = 0; c < ITERS; c++) {

            testAccess(t, V_OFFSET);

        }

    }

    @Test

    public void testFieldStatic() {

        for (int c = 0; c < ITERS; c++) {

            testAccess(STATIC_V_BASE, STATIC_V_OFFSET);

        }

    }

    @Test

    public void testArray() {

        long[] array = new long[10];

        for (int c = 0; c < ITERS; c++) {

            for (int i = 0; i < array.length; i++) {

                testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET);

            }

        }

    }

    @Test

    public void testArrayOffHeap() {

        int size = 10;

        long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT);

        try {

            for (int c = 0; c < ITERS; c++) {

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

                    testAccess(null, (((long) i) << ARRAY_SHIFT) + address);

                }

            }

        } finally {

            UNSAFE.freeMemory(address);

        }

    }

    @Test

    public void testArrayOffHeapDirect() {

        int size = 10;

        long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT);

        try {

            for (int c = 0; c < ITERS; c++) {

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

                    testAccess((((long) i) << ARRAY_SHIFT) + address);

                }

            }

        } finally {

            UNSAFE.freeMemory(address);

        }

    }

    static void testAccess(Object base, long offset) {

        // Plain

        {

            UNSAFE.putLong(base, offset, 1L);

            long x = UNSAFE.getLong(base, offset);

            assertEquals(x, 1L, "set long value");

        }

        // Volatile

        {

            UNSAFE.putLongVolatile(base, offset, 2L);

            long x = UNSAFE.getLongVolatile(base, offset);

            assertEquals(x, 2L, "putVolatile long value");

        }

        // Lazy

        {

            UNSAFE.putOrderedLong(base, offset, 1L);

            long x = UNSAFE.getLongVolatile(base, offset);

            assertEquals(x, 1L, "putRelease long value");

        }

        // Unaligned

        {

            UNSAFE.putLongUnaligned(base, offset, 2L);

            long x = UNSAFE.getLongUnaligned(base, offset);

            assertEquals(x, 2L, "putUnaligned long value");

        }

        {

            UNSAFE.putLongUnaligned(base, offset, 1L, true);

            long x = UNSAFE.getLongUnaligned(base, offset, true);

            assertEquals(x, 1L, "putUnaligned big endian long value");

        }

        {

            UNSAFE.putLongUnaligned(base, offset, 2L, false);

            long x = UNSAFE.getLongUnaligned(base, offset, false);

            assertEquals(x, 2L, "putUnaligned little endian long value");

        }

        UNSAFE.putLong(base, offset, 1L);

        // Compare

        {

            boolean r = UNSAFE.compareAndSwapLong(base, offset, 1L, 2L);

            assertEquals(r, true, "success compareAndSwap long");

            long x = UNSAFE.getLong(base, offset);

            assertEquals(x, 2L, "success compareAndSwap long value");

        }

        {

            boolean r = UNSAFE.compareAndSwapLong(base, offset, 1L, 3L);

            assertEquals(r, false, "failing compareAndSwap long");

            long x = UNSAFE.getLong(base, offset);

            assertEquals(x, 2L, "failing compareAndSwap long value");

        }

        // Compare set and get

        {

            long o = UNSAFE.getAndSetLong(base, offset, 1L);

            assertEquals(o, 2L, "getAndSet long");

            long x = UNSAFE.getLong(base, offset);

            assertEquals(x, 1L, "getAndSet long value");

        }

        UNSAFE.putLong(base, offset, 1L);

        // get and add, add and get

        {

            long o = UNSAFE.getAndAddLong(base, offset, 2L);

            assertEquals(o, 1L, "getAndAdd long");

            long x = UNSAFE.getLong(base, offset);

            assertEquals(x, 1L + 2L, "weakCompareAndSwapRelease long");

        }

    }

    static void testAccess(long address) {

        // Plain

        {

            UNSAFE.putLong(address, 1L);

            long x = UNSAFE.getLong(address);

            assertEquals(x, 1L, "set long value");

        }

    }

}