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/*

 * @test

 * @bug 8143628

 * @summary Test unsafe access for int

 *

 * @modules jdk.unsupported/sun.misc

 * @run testng/othervm -Diters=100   -Xint                   compiler.unsafe.SunMiscUnsafeAccessTestInt

 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.SunMiscUnsafeAccessTestInt

 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation  compiler.unsafe.SunMiscUnsafeAccessTestInt

 * @run testng/othervm -Diters=20000                         compiler.unsafe.SunMiscUnsafeAccessTestInt

 */

package compiler.unsafe;

import org.testng.annotations.Test;

import java.lang.reflect.Field;

import static org.testng.Assert.*;

public class SunMiscUnsafeAccessTestInt {

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

    static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10);

    static final sun.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 = sun.misc.Unsafe.class.getDeclaredField("theUnsafe");

            f.setAccessible(true);

            UNSAFE = (sun.misc.Unsafe) f.get(null);

        } catch (Exception e) {

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

        }

        try {

            Field staticVField = SunMiscUnsafeAccessTestInt.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 = SunMiscUnsafeAccessTestInt.class.getDeclaredField("v");

            V_OFFSET = UNSAFE.objectFieldOffset(vField);

        } catch (Exception e) {

            throw new RuntimeException(e);

        }

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

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

        ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);

    }

    static int static_v;

    int v;

    @Test

    public void testFieldInstance() {

        SunMiscUnsafeAccessTestInt t = new SunMiscUnsafeAccessTestInt();

        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() {

        int[] array = new int[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.putInt(base, offset, 0x01234567);

            int x = UNSAFE.getInt(base, offset);

            assertEquals(x, 0x01234567, "set int value");

        }

        // Volatile

        {

            UNSAFE.putIntVolatile(base, offset, 0x89ABCDEF);

            int x = UNSAFE.getIntVolatile(base, offset);

            assertEquals(x, 0x89ABCDEF, "putVolatile int value");

        }

        // Lazy

        {

            UNSAFE.putOrderedInt(base, offset, 0x01234567);

            int x = UNSAFE.getIntVolatile(base, offset);

            assertEquals(x, 0x01234567, "putRelease int value");

        }

        UNSAFE.putInt(base, offset, 0x01234567);

        // Compare

        {

            boolean r = UNSAFE.compareAndSwapInt(base, offset, 0x01234567, 0x89ABCDEF);

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

            int x = UNSAFE.getInt(base, offset);

            assertEquals(x, 0x89ABCDEF, "success compareAndSwap int value");

        }

        {

            boolean r = UNSAFE.compareAndSwapInt(base, offset, 0x01234567, 0xCAFEBABE);

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

            int x = UNSAFE.getInt(base, offset);

            assertEquals(x, 0x89ABCDEF, "failing compareAndSwap int value");

        }

        UNSAFE.putInt(base, offset, 0x89ABCDEF);

        // Compare set and get

        {

            int o = UNSAFE.getAndSetInt(base, offset, 0x01234567);

            assertEquals(o, 0x89ABCDEF, "getAndSet int");

            int x = UNSAFE.getInt(base, offset);

            assertEquals(x, 0x01234567, "getAndSet int value");

        }

        UNSAFE.putInt(base, offset, 0x01234567);

        // get and add, add and get

        {

            int o = UNSAFE.getAndAddInt(base, offset, 0x89ABCDEF);

            assertEquals(o, 0x01234567, "getAndAdd int");

            int x = UNSAFE.getInt(base, offset);

            assertEquals(x, (int)(0x01234567 + 0x89ABCDEF), "getAndAdd int");

        }

    }

    static void testAccess(long address) {

        // Plain

        {

            UNSAFE.putInt(address, 0x01234567);

            int x = UNSAFE.getInt(address);

            assertEquals(x, 0x01234567, "set int value");

        }

    }

}