hotspot/test/runtime/Unsafe/GetPutBoolean.java
author gtriantafill
Wed, 14 Sep 2016 08:17:50 -0400
changeset 41092 c388d897472d
parent 40855 3c4c913195e3
permissions -rw-r--r--
8165889: Remove jdk.test.lib.unsafe.UnsafeHelper Summary: Remove use of setAccessible() to get Unsafe. Reviewed-by: shade, lfoltan

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 */

/*
 * @test
 * @summary Verify behaviour of Unsafe.get/putBoolean
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @run main GetPutBoolean
 */

import java.lang.reflect.Field;
import jdk.internal.misc.Unsafe;
import static jdk.test.lib.Asserts.*;

public class GetPutBoolean {
    public static void main(String args[]) throws Exception {
        Unsafe unsafe = Unsafe.getUnsafe();
        Test t = new Test();
        Field field = Test.class.getField("b1");

        long offset = unsafe.objectFieldOffset(field);
        assertEquals(false, unsafe.getBoolean(t, offset));
        unsafe.putBoolean(t, offset, true);
        assertEquals(true, unsafe.getBoolean(t, offset));

        boolean arrayBoolean[] = { true, false, false, true };
        int scale = unsafe.arrayIndexScale(arrayBoolean.getClass());
        offset = unsafe.arrayBaseOffset(arrayBoolean.getClass());
        for (int i = 0; i < arrayBoolean.length; i++) {
            assertEquals(unsafe.getBoolean(arrayBoolean, offset), arrayBoolean[i]);
            offset += scale;
        }
    }

    static class Test {
        public boolean b1 = false;
    }
}