1 /*
   2  * Copyright 2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 4992443 4994819
  27  * @summary Checks that the value of VMSupportsCS8 matches system properties.
  28  */
  29 
  30 import java.lang.reflect.Field;
  31 
  32 public class VMSupportsCS8 {
  33     public static void main(String[] args) throws Exception {
  34         if (System.getProperty("sun.cpu.isalist").matches
  35             (".*\\b(sparcv9|pentium_pro|ia64|amd64).*")
  36             ||
  37             System.getProperty("os.arch").matches
  38             (".*\\b(ia64|amd64).*")) {
  39 
  40             System.out.println("This system is known to have hardware CS8");
  41 
  42             Class klass = Class.forName("java.util.concurrent.atomic.AtomicLong");
  43             Field field = klass.getDeclaredField("VM_SUPPORTS_LONG_CAS");
  44             field.setAccessible(true);
  45             boolean VMSupportsCS8 = field.getBoolean(null);
  46             if (! VMSupportsCS8)
  47                 throw new Exception("Unexpected value for VMSupportsCS8");
  48         }
  49     }
  50 }