Oracle Database Discussions

Hi
I have waits "library cache lock".
I try to get locked object via sql:

select kglnaown, kglnaobj from x$kglob where kglhdadr = 'C000000EC6B31578';

select * from dba_lock_internal where lock_id2 = 'C000000EC6B31578';


But the result I get is:

$BUILD$ 42ff7f79d696f573

I think it isn't correct. What I do wrong? Help me please.

How I can get locked object if I have only 'C000000EC6B31578'?
Thanks!