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/*

 * @test

 * @bug 8143628

 * @summary Test unsafe access for long

 *

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

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

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

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

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

 */

package compiler.unsafe;

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

    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, 0x0123456789ABCDEFL);

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

            assertEquals(x, 0x0123456789ABCDEFL, "set long value");

        }

        // Volatile

        {

            UNSAFE.putLongVolatile(base, offset, 0xCAFEBABECAFEBABEL);

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

            assertEquals(x, 0xCAFEBABECAFEBABEL, "putVolatile long value");

        }

        // Lazy

        {

            UNSAFE.putLongRelease(base, offset, 0x0123456789ABCDEFL);

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

            assertEquals(x, 0x0123456789ABCDEFL, "putRelease long value");

        }

        // Opaque

        {

            UNSAFE.putLongOpaque(base, offset, 0xCAFEBABECAFEBABEL);

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

            assertEquals(x, 0xCAFEBABECAFEBABEL, "putOpaque long value");

        }

        // Unaligned

        {

            UNSAFE.putLongUnaligned(base, offset, 0xCAFEBABECAFEBABEL);

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

            assertEquals(x, 0xCAFEBABECAFEBABEL, "putUnaligned long value");

        }

        {

            UNSAFE.putLongUnaligned(base, offset, 0x0123456789ABCDEFL, true);

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

            assertEquals(x, 0x0123456789ABCDEFL, "putUnaligned big endian long value");

        }

        {

            UNSAFE.putLongUnaligned(base, offset, 0xCAFEBABECAFEBABEL, false);

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

            assertEquals(x, 0xCAFEBABECAFEBABEL, "putUnaligned little endian long value");

        }

        UNSAFE.putLong(base, offset, 0x0123456789ABCDEFL);

        // Compare

        {

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

        }

        {

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

        }

        // Advanced compare

        {

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

        }

        {

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

        }

        {

            long r = UNSAFE.compareAndExchangeLongAcquire(base, offset, 0x0123456789ABCDEFL, 0xCAFEBABECAFEBABEL);

            assertEquals(r, 0x0123456789ABCDEFL, "success compareAndExchangeAcquire long");

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

            assertEquals(x, 0xCAFEBABECAFEBABEL, "success compareAndExchangeAcquire long value");

        }

        {

            long r = UNSAFE.compareAndExchangeLongAcquire(base, offset, 0x0123456789ABCDEFL, 0xDEADBEEFDEADBEEFL);

            assertEquals(r, 0xCAFEBABECAFEBABEL, "failing compareAndExchangeAcquire long");

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

            assertEquals(x, 0xCAFEBABECAFEBABEL, "failing compareAndExchangeAcquire long value");

        }

        {

            long r = UNSAFE.compareAndExchangeLongRelease(base, offset, 0xCAFEBABECAFEBABEL, 0x0123456789ABCDEFL);

            assertEquals(r, 0xCAFEBABECAFEBABEL, "success compareAndExchangeRelease long");

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

            assertEquals(x, 0x0123456789ABCDEFL, "success compareAndExchangeRelease long value");

        }

        {

            long r = UNSAFE.compareAndExchangeLongRelease(base, offset, 0xCAFEBABECAFEBABEL, 0xDEADBEEFDEADBEEFL);

            assertEquals(r, 0x0123456789ABCDEFL, "failing compareAndExchangeRelease long");

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

            assertEquals(x, 0x0123456789ABCDEFL, "failing compareAndExchangeRelease long value");

        }

        {

            boolean success = false;

            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {

            }

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

        }

        {

            boolean success = false;

            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {

            }

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

        }

        {

            boolean success = false;

            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {

            }

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

        }

        {

            boolean success = false;

            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {

            }

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

        }

        UNSAFE.putLong(base, offset, 0xCAFEBABECAFEBABEL);

        // Compare set and get

        {

            long o = UNSAFE.getAndSetLong(base, offset, 0x0123456789ABCDEFL);

            assertEquals(o, 0xCAFEBABECAFEBABEL, "getAndSet long");

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

            assertEquals(x, 0x0123456789ABCDEFL, "getAndSet long value");

        }

        UNSAFE.putLong(base, offset, 0x0123456789ABCDEFL);

        // get and add, add and get

        {

            long o = UNSAFE.getAndAddLong(base, offset, 0xCAFEBABECAFEBABEL);

            assertEquals(o, 0x0123456789ABCDEFL, "getAndAdd long");

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

            assertEquals(x, (long)(0x0123456789ABCDEFL + 0xCAFEBABECAFEBABEL), "getAndAdd long");

        }

    }

    static void testAccess(long address) {

        // Plain

        {

            UNSAFE.putLong(address, 0x0123456789ABCDEFL);

            long x = UNSAFE.getLong(address);

            assertEquals(x, 0x0123456789ABCDEFL, "set long value");

        }

    }

}