V$LOCKED_OBJECT

Columns
   ___________________________
 
   XIDUSN
   XIDSQN
   XIDSLOT
   LOCKED_MODE
   PROCESS
   ORACLE_USERNAME
   OS_USER_NAME
   SESSION_ID
   OBJECT_ID

Related Views:

V$BUFFER_POOL 
V$CACHE
V$CACHE_LOCK
V$CLASS_PING 
V$DLM_CONVERT_LOCAL 
V$DLM_CONVERT_REMOTE 
V$DLM_LATCH 
V$DLM_MISC 
V$ENQUEUE_LOCK 
V$EVENT_NAME 
V$FALSE_PING
V$LATCH 
V$LATCHHOLDER 
V$LATCHNAME 
V$LATCH_CHILDREN 
V$LATCH_MISSES 
V$LATCH_PARENT 
V$LIBRARYCACHE 
V$LOCK 
V$_LOCK
V$LOCKS_WITH_COLLISIONS 
V$LOCK_ACTIVITY 
V$LOCK_ELEMENT 
V$PING
V$RESOURCE  
V$RESOURCE_LIMIT 
V$TRANSACTION_ENQUEUE