test/compiler/unsafe/JdkInternalMiscUnsafeAccessTestBoolean.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @bug 8143628
 * @summary Test unsafe access for boolean
 * @modules java.base/jdk.internal.misc
 * @run testng/othervm -Diters=100   -Xint                   JdkInternalMiscUnsafeAccessTestBoolean
 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 JdkInternalMiscUnsafeAccessTestBoolean
 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation  JdkInternalMiscUnsafeAccessTestBoolean
 * @run testng/othervm -Diters=20000                         JdkInternalMiscUnsafeAccessTestBoolean
 */

import org.testng.annotations.Test;

import java.lang.reflect.Field;

import static org.testng.Assert.*;

public class JdkInternalMiscUnsafeAccessTestBoolean {
    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 = JdkInternalMiscUnsafeAccessTestBoolean.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 = JdkInternalMiscUnsafeAccessTestBoolean.class.getDeclaredField("v");
            V_OFFSET = UNSAFE.objectFieldOffset(vField);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

        ARRAY_OFFSET = UNSAFE.arrayBaseOffset(boolean[].class);
        int ascale = UNSAFE.arrayIndexScale(boolean[].class);
        ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);
    }

    static boolean static_v;

    boolean v;

    @Test
    public void testFieldInstance() {
        JdkInternalMiscUnsafeAccessTestBoolean t = new JdkInternalMiscUnsafeAccessTestBoolean();
        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() {
        boolean[] array = new boolean[10];
        for (int c = 0; c < ITERS; c++) {
            for (int i = 0; i < array.length; i++) {
                testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET);
            }
        }
    }


    static void testAccess(Object base, long offset) {
        // Plain
        {
            UNSAFE.putBoolean(base, offset, true);
            boolean x = UNSAFE.getBoolean(base, offset);
            assertEquals(x, true, "set boolean value");
        }

        // Volatile
        {
            UNSAFE.putBooleanVolatile(base, offset, false);
            boolean x = UNSAFE.getBooleanVolatile(base, offset);
            assertEquals(x, false, "putVolatile boolean value");
        }


        // Lazy
        {
            UNSAFE.putBooleanRelease(base, offset, true);
            boolean x = UNSAFE.getBooleanAcquire(base, offset);
            assertEquals(x, true, "putRelease boolean value");
        }

        // Opaque
        {
            UNSAFE.putBooleanOpaque(base, offset, false);
            boolean x = UNSAFE.getBooleanOpaque(base, offset);
            assertEquals(x, false, "putOpaque boolean value");
        }



    }

}