return None, None
	for thr in gdb.selected_inferior().threads():
		if thr.ptid[1] == m['procid']:
			break
	else:
		return None, None
	# Get scheduler state from the G's OS thread state.
	curthr = gdb.selected_thread()
	try:
		thr.switch()
		pc = gdb.parse_and_eval('$pc')
		sp = gdb.parse_and_eval('$sp')
	finally:
		curthr.switch()
	return pc.cast(vp), sp.cast(vp)


class GoroutineCmd(gdb.Command):