src/java.base/share/classes/java/lang/System.java

*** 531,540 ****
--- 531,570 ----
      public static native void arraycopy(Object src,  int  srcPos,
                                          Object dest, int destPos,
                                          int length);
  
      /**
+      * Set bit atomically
+      * @param bits   bits
+      * @param index  index
+      */
+     @HotSpotIntrinsicCandidate
+     public static void setBit(byte[] bits, int index) {
+         throw new UnsupportedOperationException();
+     }
+ 
+     /**
+      * Clear bit atomically
+      * @param bits   bits
+      * @param index  index
+      */
+     @HotSpotIntrinsicCandidate
+     public static void clrBit(byte[] bits, int index) {
+         throw new UnsupportedOperationException();
+     }
+ 
+     /**
+      * Get bit
+      * @param bits   bits
+      * @param index  index
+      * @return       value
+      */
+     public static boolean isBit(byte[] bits, int index) {
+         return ((bits[index>>3] >> (index & 7)) & 1) == 1;
+     }
+ 
+     /**
       * Returns the same hash code for the given object as
       * would be returned by the default method hashCode(),
       * whether or not the given object's class overrides
       * hashCode().
       * The hash code for the null reference is zero.