Re: Troubleshooting Apache2 Segfaults

["Joel Gwynn" <suppressed>]

On 1/22/07, Perrin Harkins <suppressed> wrote:
> On 1/21/07, Joel Gwynn <suppressed> wrote:
> > I've got a mod_perl application which segfaults on every 10th or so
> > requests.  Here's what I get in my error log:
> >
> > [notice] child pid xxxx exit signal Segmentation fault (11)
> >
> > How would I go about troubleshooting this?
>
> There are instructions for getting a backtrace here:
> http://perl.apache.org/docs/2.0/user/help/help.html#Reporting_Problems
>
> - Perrin

Soooo ... I've recompiled mod_perl with MP_DEBUG=1 and I've got some
core dumps.  I'm hoping I don't need to recompile perl because I'm
using debian, and perl and debian are so closely intertwined that that
could be tricky.

Here's my backtrace, any ideas?

#0  0xb7a58743 in modperl_dir_config (my_perl=0x81b6eb0, r=0x823ce98,
s=0x203a6e6f,
   key=0x8800c38 "CONFIG_FILE", sv_val=0x0) at modperl_util.c:516
#1  0xb78dae84 in XS_Apache2__RequestRec_dir_config
(my_perl=0x81b6eb0, cv=0x82cd074)
   at RequestUtil.xs:301
#2  0xb79a3ab9 in Perl_pp_entersub () from /usr/lib/libperl.so.5.8
#3  0xb799bc99 in Perl_runops_standard () from /usr/lib/libperl.so.5.8
#4  0xb793e459 in Perl_call_sv () from /usr/lib/libperl.so.5.8
#5  0xb793e23d in Perl_call_sv () from /usr/lib/libperl.so.5.8
#6  0xb7a5401a in modperl_callback (my_perl=0x81b6eb0,
handler=0x80dae20, p=0x8240e70,
   r=0x8240ea8, s=0x80e2c78, args=0x8aae448) at modperl_callback.c:101
#7  0xb7a54918 in modperl_callback_run_handlers (idx=6, type=4,
r=0x8240ea8, c=0x0,
   s=0x80e2c78, pconf=0x0, plog=0x0, ptemp=0x0, run_mode=MP_HOOK_RUN_FIRST)
   at modperl_callback.c:262
#8  0xb7a54df5 in modperl_callback_per_dir (idx=6, r=0x8240ea8,
run_mode=MP_HOOK_RUN_FIRST)
   at modperl_callback.c:369
#9  0xb7a4cb09 in modperl_response_handler_run (r=0x8240ea8, finish=0)
at mod_perl.c:995
#10 0xb7a4ce3c in modperl_response_handler_cgi (r=0x8240ea8) at mod_perl.c:1090
#11 0x08078375 in ap_run_handler ()
#12 0x08078980 in ap_invoke_handler ()
#13 0x08069c6a in ap_process_request ()
#14 0x0806512d in _start ()
#15 0x08240ea8 in ?? ()
#16 0x00000004 in ?? ()
#17 0x08240ea8 in ?? ()
#18 0xb7a6e6f1 in modperl_process_connection_handler (c=0x8236f58) at
modperl_hooks.c:17
#19 0x080835c5 in ap_run_process_connection ()