Package: xserver-xorg-core
Version: 2:1.20.8-2
Severity: wishlist
Dear Maintainer,
in the past I was trying to make sense of some backtraces written
by Xorg, but failed, e.g. in #969739.
I did now some debugging and found that in function xorg_backtrace
the function begin retrieved by unw_get_proc_info in "pip.start_ip"
cannot always be used for calculations with "off".
This is because this "off" offset is calculated in unw_get_proc_name
from the nearest symbol, which does not necessarily match pip.start_ip.
Attached patch separately retrieves the instruction pointer by unw_get_reg
and uses that value for the output. A short in gdb wrote with this patch
applied the same addresses as the bt command.
What do you think?