code: def do_bp(self, arg):
          
          pid = self.get_process_id_from_prefix()
          if not self.debug.is_debugee(pid):
              raise CmdError("target process is not being debugged")
          process     = self.get_process(pid)
          token_list  = self.split_tokens(arg, 1, 1)
          try:
              address = self.input_address(token_list[0], pid)
              deferred = False
          except Exception:
              address = token_list[0]
              deferred = True
          if not address:
              address = token_list[0]
              deferred = True
          self.debug.break_at(pid, address)
          if deferred:
              print("Deferred breakpoint set at %s" % address)
          else:
              print("Breakpoint set at %s" % address)
docs: [~process] bp <address> - set a code breakpoint