65 lines
2.3 KiB
Java
65 lines
2.3 KiB
Java
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/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @summary Verify behaviour of Unsafe.get/putByte
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* @library /testlibrary
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* @run main GetPutByte
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*/
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import java.lang.reflect.Field;
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import com.oracle.java.testlibrary.*;
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import sun.misc.Unsafe;
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import static com.oracle.java.testlibrary.Asserts.*;
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public class GetPutByte {
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public static void main(String args[]) throws Exception {
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Unsafe unsafe = Utils.getUnsafe();
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Test t = new Test();
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Field field = Test.class.getField("b");
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int offset = unsafe.fieldOffset(field);
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assertEquals((byte)0, unsafe.getByte(t, offset));
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unsafe.putByte(t, offset, (byte)1);
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assertEquals((byte)1, unsafe.getByte(t, offset));
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long address = unsafe.allocateMemory(8);
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unsafe.putByte(address, (byte)2);
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assertEquals((byte)2, unsafe.getByte(address));
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unsafe.freeMemory(address);
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byte arrayByte[] = { -1, 0, 1, 2 };
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int scale = unsafe.arrayIndexScale(arrayByte.getClass());
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offset = unsafe.arrayBaseOffset(arrayByte.getClass());
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for (int i = 0; i < arrayByte.length; i++) {
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assertEquals(unsafe.getByte(arrayByte, offset), arrayByte[i]);
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offset += scale;
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}
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}
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static class Test {
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public byte b = 0;
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}
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}
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