GetPutBoolean.java revision 8359:ed6389f70257
1/* 2 * Copyright (c) 2015, 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/putBoolean 27 * @library /testlibrary 28 * @modules java.base/sun.misc 29 * java.management 30 * @run main GetPutBoolean 31 */ 32 33import java.lang.reflect.Field; 34import jdk.test.lib.*; 35import sun.misc.Unsafe; 36import static jdk.test.lib.Asserts.*; 37 38public class GetPutBoolean { 39 public static void main(String args[]) throws Exception { 40 Unsafe unsafe = Utils.getUnsafe(); 41 Test t = new Test(); 42 Field field = Test.class.getField("b1"); 43 44 long offset = unsafe.objectFieldOffset(field); 45 assertEquals(false, unsafe.getBoolean(t, offset)); 46 unsafe.putBoolean(t, offset, true); 47 assertEquals(true, unsafe.getBoolean(t, offset)); 48 49 boolean arrayBoolean[] = { true, false, false, true }; 50 int scale = unsafe.arrayIndexScale(arrayBoolean.getClass()); 51 offset = unsafe.arrayBaseOffset(arrayBoolean.getClass()); 52 for (int i = 0; i < arrayBoolean.length; i++) { 53 assertEquals(unsafe.getBoolean(arrayBoolean, offset), arrayBoolean[i]); 54 offset += scale; 55 } 56 } 57 58 static class Test { 59 public boolean b1 = false; 60 } 61} 62