Auth SEGV on sparc64, alignment problem?

[Aki Tuomi]

Hi!

Unfortunately we do not have a Sparc64 with any OS at hand. Maybe you could 

break main
r
s

until it breaks?

Aki


> On 22 February 2018 at 05:14 Chris Ross <cross+dovecot at distal.com> wrote:
> 
> 
>   Sadly, that doesn’t help either.  Over the past day, I’ve built and installed a different branch of the OS (stable/11, instead of release/11.1), to see if a new compiler/libc might change things.  Sadly, it does not.
> 
>   In the same situation now, auth fails immediately with signal 11.  Running gdb on auth (from build dir, compiled -g -O2) shows something similar.
> 
>        - Chris
> 
> # gdb work/dovecot-2.2.33.2/src/auth/.libs/auth
> GNU gdb 6.1.1 [FreeBSD]
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for details.
> This GDB was configured as "sparc64-marcel-freebsd"...
> (gdb) list
> 372			/* ask auth master to disconnect us */
> 373			auth_worker_client_send_shutdown();
> 374		}
> 375	}
> 376	
> 377	int main(int argc, char *argv[])
> 378	{
> 379		int c;
> 380	
> 381		master_service = master_service_init("auth", 0, &argc, &argv, "w");
> (gdb) run
> Starting program: /usr/ports/mail/dovecot/work/dovecot-2.2.33.2/src/auth/.libs/auth 
> 
> Program received signal SIGTRAP, Trace/breakpoint trap.
> Cannot remove breakpoints because program is no longer writable.
> It might be running in another process.
> Further execution is probably impossible.
> 0x000000004022a380 in ?? ()
> (gdb) bt
> #0  0x000000004022a380 in ?? ()
> #1  0x0000000000000008 in ?? ()
> Previous frame identical to this frame (corrupt stack?)
> (gdb) 
> 
> 
> > On Feb 21, 2018, at 02:01, Aki Tuomi <aki.tuomi at dovecot.fi> wrote:
> > 
> > Your core dump looks a bit broken. Since it seems to die instantly, can
> > you try gdb /path/to/auth and just run it?
> > 
> > Aki
>