GOMEZ Henri wrote:
>
> >Just realised that the core I have was compiled without -g option. VERY
> >useful. I also wanted to replicate the core dump with the
> >httpd that was
> >compiled with -g, but that didn't work. Now I'm starting to think that
> >the core file I had was a result of a different crash (I was
> >experimenting with a lot of stuff and Apache would sometimes spit the
> >dummy).
> >
> >So, how do I get to you something you can use? I've seen the Apache
> >debugging document (http://dev.apache.org/debugging.html) and forceful
> >core dumping techniques, but I couldn't find truss for Linux.
> >Or maybe I
> >should use something else?
> >
> >What are your suggestions?
>
> Ask to Apache specialist in new-http list, may be JF Clere could
> forward your question to them ?
Here is the backtrace from gdb when the segfault happens (I'm starting
to enjoy this debugging of Apache :-)
-------------------------------------
Program received signal SIGSEGV, Segmentation fault.
0x4021d26f in strncmp (s1=0x0, s2=0x82d2bb4 "/whatwedo/", n=137294736)
at ../sysdeps/generic/strncmp.c:42
42 ../sysdeps/generic/strncmp.c: No such file or directory.
(gdb) where
#0 0x4021d26f in strncmp (s1=0x0, s2=0x82d2bb4 "/whatwedo/",
n=137294736)
at ../sysdeps/generic/strncmp.c:42
#1 0x8076e91 in map_uri_to_worker (uw_map=0x82ef290,
uri=0x82d2bb4 "/whatwedo/", l=0x82ef100) at jk_uri_worker_map.c:412
#2 0x8072a4c in jk_translate (r=0x82d145c) at mod_jk.c:1177
#3 0x8146a99 in run_method (r=0x82d145c, offset=0, run_all=0)
at http_config.c:369
#4 0x8146ae2 in ap_translate_name (r=0x82d145c) at http_config.c:381
#5 0x81552b4 in process_request_internal (r=0x82d145c) at
http_request.c:1198
#6 0x8155682 in ap_process_request (r=0x82d145c) at http_request.c:1323
#7 0x814f2d0 in child_main (child_num_arg=0) at http_main.c:4299
#8 0x814f4eb in make_child (s=0x827c2e4, slot=0, now=996554230)
at http_main.c:4467
#9 0x814f560 in startup_children (number_to_start=1) at
http_main.c:4494
#10 0x814fbd1 in standalone_main (argc=1, argv=0xbffff854) at
http_main.c:4854
#11 0x8150138 in main (argc=1, argv=0xbffff854) at http_main.c:5124
#12 0x401b9b5c in __libc_start_main (main=0x814fe2c <main>, argc=1,
ubp_av=0xbffff854, init=0x806f500 <_init>, fini=0x81b7c70 <_fini>,
rtld_fini=0x4000d634 <_dl_fini>, stack_end=0xbffff84c)
at ../sysdeps/generic/libc-start.c:129
-------------------------------------
Looks like strncmp received a NULL pointer at #0...
Bojan
