Re: understanding LOCKDEBUG

[Masao Uebayashi <uebayasi%tombi.co.jp@localhost>]

> Does some LWP hold the lock or not?  How do I know?

If I read the code correctly, the only way to know the owner thread from a
given (waiting thread, syncobj) is to call (*l->l_syncobj->sobj_owner)().

        lwp_t *
        sobj_owner(lwp_t *l, void *sobj)
        {

                return (*l->l_syncobj->sobj_owner)(sobj);
        }

and in ddb, doing

        call sobj_owner(<lwp_address>, <lock_address>)

should return the address of the owner.

(Not tested at all. ;)

Masao