Query to find lock records

select
   c.owner,
   c.object_name,
   c.object_type,
   b.sid,
   b.serial#,
   b.status,
   b.osuser,
   b.machine,
   b.* 
from
   v$locked_object a ,
   v$session b,
   dba_objects c
where b.sid = a.session_id
and a.object_id = c.object_id;