Re: xsrc/58133: X server crashes; radeon 5450; modesetting

[Rhialto <rhialto%falu.nl@localhost>]

The following reply was made to PR xsrc/58133; it has been noted by GNATS.

From: Rhialto <rhialto%falu.nl@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: xsrc-manager%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost,
	Rhialto <rhialto%falu.nl@localhost>
Subject: Re: xsrc/58133: X server crashes; radeon 5450; modesetting
Date: Sun, 12 May 2024 22:36:40 +0200

 >  > Typing "c" for continue in gdb simply continued X without causing the
 >  > expected crash.
 >  
 >  FWIW, i've seen this "feature" multiple times, and i don't
 >  think it is directly related to this problem.  something that
 >  X is doing (and that other things can do) seems to set it up.
 
 There is a signal handler for SIGSEGV and others set up by OsInit() in
 xsrc/external/mit/xorg-server/dist/os/osinit.c, and the handler is
 OsSigHandler() in the same file. This looks like it is where the stack
 trace in the Xorg.0.log file is generated. There may be a detour via a
 function pointer OsSigWrapper but that appears to be NULL. A breakpoint
 set on OsSigHandler() doesn't trigger.
 
 I didn't find a gdb command to see the state of signals and their
 handlers.