code: def do_processlist(self, arg):
          
          if self.cmdprefix:
              raise CmdError("prefix not allowed")
          if arg:
              raise CmdError("too many arguments")
          system   = self.debug.system
          pid_list = self.debug.get_debugee_pids()
          if pid_list:
              print("Process ID   File name")
              for pid in pid_list:
                  if   pid == 0:
                      filename = "System Idle Process"
                  elif pid == 4:
                      filename = "System"
                  else:
                      filename = system.get_process(pid).get_filename()
                      filename = PathOperations.pathname_to_filename(filename)
                  print("%-12d %s" % (pid, filename))
docs: pl - show the processes being debugged
          processlist - show the processes being debugged