< prev index next >

test/jdk/java/util/concurrent/atomic/VMSupportsCS8.java

Print this page
rev 52426 : 8185496: Improve performance of system properties initialization in initPhase1
8213424: VersionProps duplicate and skipped initialization


  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         if (System.getProperty("sun.cpu.isalist").matches

  37             (".*\\b(sparcv9|pentium_pro|ia64|amd64).*")
  38             ||
  39             System.getProperty("os.arch").matches
  40             (".*\\b(ia64|amd64).*")) {
  41 
  42             System.out.println("This system is known to have hardware CS8");
  43 
  44             Class klass = Class.forName("java.util.concurrent.atomic.AtomicLong");
  45             Field field = klass.getDeclaredField("VM_SUPPORTS_LONG_CAS");
  46             field.setAccessible(true);
  47             boolean VMSupportsCS8 = field.getBoolean(null);
  48             if (! VMSupportsCS8)
  49                 throw new Exception("Unexpected value for VMSupportsCS8");
  50         }
  51     }
  52 }


  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 }
< prev index next >