CVSROOT: /cvs
Module name: src
Changes by: clau...@cvs.openbsd.org 2023/05/12 08:14:16
Modified files:
usr.sbin/btrace: btrace.c btrace.h ksyms.c
Log message:
btrace(8) support to symbolize utrace addresses.
This only works for a single static binary where everything was compiled
with -fno-omit-frame-pointer since the stack unwinder requires the
frame-pointer.
A possible btrace script to capture performace of a single process is:
profile:hz:100 / pid == $1 / {
@[ustack] = count();
}
Then using btrace -p program uprofile.bt `pgrep program` will collect
the information for program.
This is far from perfect but should allow other people to play with this
and hopefully improve work.
OK mpi@
