code: def stalk_variable(self, tid, address, size, action = None):
          
          bp = self.__set_variable_watch(tid, address, size, action)
          if not bp.is_one_shot():
              self.enable_one_shot_hardware_breakpoint(tid, address)
docs: Sets a one-shot hardware breakpoint at the given thread,
          address and size.
  
          @see: L{dont_watch_variable}
  
          @type  tid: int
          @param tid: Thread global ID.
  
          @type  address: int
          @param address: Memory address of variable to watch.
  
          @type  size: int
          @param size: Size of variable to watch. The only supported sizes are:
              byte (1), word (2), dword (4) and qword (8).
  
          @type  action: function
          @param action: (Optional) Action callback function.
  
              See L{define_hardware_breakpoint} for more details.