---- Joe Lewis <j...@joe-lewis.com> wrote:
> On 6/21/12 5:49 PM, oh...@cox.net wrote:
> > ---- oh...@cox.net wrote:
> >> ---- Sorin Manolache<sor...@gmail.com> wrote:
> >>> And I forgot to say: run gdb in some sort of environment where you see
> >>> your current source code line and a couple of surrounding lines. You
> >>> could achieve this with the "list" command, but I prefer running gdb in
> >>> emacs and let emacs do the nice listing of source code in a different
> >>> panel.
> >>>
> >>> S
> >>
> >> Here's the function from my source. It's the original from mod_headers.c,
> >> plus my printf:
> >>
> >>
> >> static int header_post_config(apr_pool_t *pconf, apr_pool_t *plog,
> >> apr_pool_t *ptemp, server_rec *s)
> >> {
> >> printf("In header_post_config\n");
> >> header_ssl_lookup = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup);
> >> return OK;
> >> }
> >>
> >> Jim
> >
> > Hi,
> >
> > I was able to get the segfault to go away. Here's what I had to do:
> >
> > - Created /etc/ld.so.conf.d/my.conf, and added the directory where my
> > libobaccess.so was
> > - Run 'ldconfig' to activate.
> > - In the apxs command, DON'T include the -L and -l arguments
> >
> > After that, Apache appears to start ok, without segfault :)!!
> >
> > Thanks for all of the great help, esp. the suggestion about checking
> > "ldconfig -p". I still don't understand why, but I'm just glad that I can
> > get past this piece so now I can debug my module :)...
> >
> > Later,
> > Jim
> I'm just glad this list is as good as it is!
>
> FYI, the ldconfig is the dynamic linker control, and those
> /etc/ld.so.conf.d files provide additional search directories for the
> linker to check in when loading a library.
>
> Joe
> --
> http://www.silverhawk.net/
Hi,
Sorry to report, but my earlier report was a "false positive" :)...
I forgot that the mod_headers.c that I was doing the earlier testing with had
all references to the libobaccess.so removed :(!!
So, I'm still stuck with basically the same problem, now, working with my
"full" code, with the calls in it:
- If I compile with -L and -l, Apache segfaults when it starts
- If I compile without -L and -l, then I get "undefined symbol" errors when I
try to start Apache, e.g.:
[root@apachemodule build-mod_headers]# /apps/httpd2222/bin/apachectl -k start -X
httpd: Syntax error on line 84 of /apps/httpd2222/conf/httpd.conf: Cannot load
/apps/httpd2222/modules/mod_headers.so into server:
/apps/httpd2222/modules/mod_headers.so: undefined symbol: ObResource_isProtected
That "ObResource_isProtected" should be a symbol in libobaccess.so, and in
fact, if I do "nm --dynamic", I get:
[root@apachemodule build-mod_headers]# nm --dynamic
/apps/netpoint/lib64/libobaccess.so | grep "ObResource_isProtected"
00000000000a6d80 T ObResource_isProtected
[root@apachemodule build-mod_headers]#
I'm *assuming* that the reason for the "undefined symbol" error is that
libobaccess.so is actually not being loaded, but then when I try to load
libobaccess.so, either via -L and -l in the apxs, or using LoadFile in
httpd.conf, I get the segfault (same gdb info, BTW).
Catch-22?
Sorry for the false alarm :(!!
Jim
