review (XS) for 7034957: acquiring lock CodeCache_lock/1 out of order with lock tty_lock/0 -- possible deadlock

[Tom Rodriguez]

http://cr.openjdk.java.net/~never/7034957

7034957: acquiring lock CodeCache_lock/1 out of order with lock tty_lock/0 -- possible deadlock
Reviewed-by:

The code add in 7033779 to acquire the CodeCache_lock in
largest_free_block creates ordering problems with ttyLocker.  The
simplest thing is to add a ttyUnlocker.  Tested by running
-XX:+LogCompilation while triggering a sweep.