1 /* 2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @summary Verify behaviour of Unsafe.get/putShort 27 * @library /test/lib 28 * @modules java.base/jdk.internal.misc 29 * java.management 30 * @run main GetPutShort 31 */ 32 33 import java.lang.reflect.Field; 34 import jdk.internal.misc.Unsafe; 35 import static jdk.test.lib.Asserts.*; 36 37 public class GetPutShort { 38 public static void main(String args[]) throws Exception { 39 Unsafe unsafe = Unsafe.getUnsafe(); 40 Test t = new Test(); 41 Field field = Test.class.getField("s"); 42 43 long offset = unsafe.objectFieldOffset(field); 44 assertEquals((short)-1, unsafe.getShort(t, offset)); 45 unsafe.putShort(t, offset, (short)0); 46 assertEquals((short)0, unsafe.getShort(t, offset)); 47 48 long address = unsafe.allocateMemory(8); 49 unsafe.putShort(address, (short)1); 50 assertEquals((short)1, unsafe.getShort(address)); 51 unsafe.freeMemory(address); 52 53 short arrayShort[] = { -1, 0, 1, 2 }; 54 int scale = unsafe.arrayIndexScale(arrayShort.getClass()); 55 offset = unsafe.arrayBaseOffset(arrayShort.getClass()); 56 for (int i = 0; i < arrayShort.length; i++) { 57 assertEquals(unsafe.getShort(arrayShort, offset), arrayShort[i]); 58 offset += scale; 59 } 60 } 61 62 static class Test { 63 public short s = -1; 64 } 65 }