jdk/src/share/classes/java/lang/Thread.java

*** 135,144 ****
--- 135,145 ----
   * @see     Runtime#exit(int)
   * @see     #run()
   * @see     #stop()
   * @since   JDK1.0
   */
+ @sun.misc.Contended
  public
  class Thread implements Runnable {
      /* Make sure registerNatives is the first thing <clinit> does. */
      private static native void registerNatives();
      static {