for ptr in SliceValue(gdb.parse_and_eval("'runtime.allgs'")):
				goids.append(int(ptr['goid']))
		else:
			goids = [int(gdb.parse_and_eval(goid_str))]

		for goid in goids:
			self.invoke_per_goid(goid, cmd)

	def invoke_per_goid(self, goid, cmd):
		pc, sp = find_goroutine(goid)
		if not pc:
			print("No such goroutine: ", goid)
			return
		pc = pc_to_int(pc)
		save_frame = gdb.selected_frame()