1 /* 2 * Copyright (c) 2004, 2010, 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 * @bug 4992443 4994819 27 * @modules java.base/java.util.concurrent.atomic:open 28 * @run main VMSupportsCS8 29 * @summary Checks that the value of VMSupportsCS8 matches system properties. 30 */ 31 32 import java.lang.reflect.Field; 33 34 public class VMSupportsCS8 { 35 public static void main(String[] args) throws Exception { 36 String isalist = System.getProperty("sun.cpu.isalist"); 37 if (isalist != null && isalist.matches 38 (".*\\b(sparcv9|pentium_pro|ia64|amd64).*") 39 || 40 System.getProperty("os.arch").matches 41 (".*\\b(ia64|amd64).*")) { 42 43 System.out.println("This system is known to have hardware CS8"); 44 45 Class klass = Class.forName("java.util.concurrent.atomic.AtomicLong"); 46 Field field = klass.getDeclaredField("VM_SUPPORTS_LONG_CAS"); 47 field.setAccessible(true); 48 boolean VMSupportsCS8 = field.getBoolean(null); 49 if (! VMSupportsCS8) 50 throw new Exception("Unexpected value for VMSupportsCS8"); 51 } 52 } 53 }