Messages in this thread | | | Subject | Re: [PATCH 1/4] Add support for userspace stacktraces in tracing/iter_ctrl | From | Peter Zijlstra <> | Date | Sun, 26 Oct 2008 14:29:42 +0100 |
| |
On Sun, 2008-10-26 at 09:15 -0400, Frank Ch. Eigler wrote: > "=?ISO-8859-1?Q?Fr=E9d=E9ric_Weisbecker?=" <fweisbec@gmail.com> writes: > > > [...] > >> +/* Userspace stacktrace - based on kernel/trace/trace_sysprof.c */ > >> + > >> +struct stack_frame { > >> + const void __user *next_fp; > >> + unsigned long return_address; > >> +}; > > [...] > > To what extent does this actually work, and on which architectures? > While the kernel appears willing to sacrifice some performance for > functionality by building with frame pointers at the drop of a tracing > hat, userspace is not like that.
Aww, common, Gentoo is brilliant for that :-)
CFLAGS+=-fframe-pointer
emerge -uDNe world
Then again, you'd better not have all that desktop bloat installed, otherwise that will take ages.. KDE/OOo compile times anyone?
/me runs
| |