On Mon, Jun 15, 2009 at 23:53, Mel Flynn<mel.flynn+fbsd.hack...@mailing.thruhere.net> wrote: > Hi, > > I'm trying to get to the bottom of a bug with getpeername() and certain kde4 > applications which is probably as low-level as the libthr and the scheduler. > > From browsing various related files in sys/kern it seems KTR is a good bet to > get the information needed, yet it isn't really well supported in userland. > For one, I've got no clue other then logging console output(?) how to retrieve > the lock info or filter it in userland from reading ktr(9) and alq(9). Gdb is > useless as the process doesn't give the information gdb wants and gdb just > hangs in wait. ktrace also does not provide anything as there are no more > syscalls being made, so I'll have to get to the bottom of this by tracing and > filtering. > > Short description of the problem: > a process never gets out of mi_switch and remains locked even init tries to > shut it down. >
[snip] Hi Mel, my idea would be to try DTrace for this. Hopefully the following link will help you: http://wiki.freebsd.org/DTrace There are more links at the bottom. I added DTrace probes to geom a while ago and it's really easy. Feel free to ask for more help. Kind regards Marius _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"