Re: Bus Error with mod_perl 2.04

[David E. Wheeler]

On Apr 24, 2008, at 00:03, Philippe M. Chiasson wrote:

Nah, the core file by itself is not exactly super usefull. You just  
have
to figure out how to get a debugging build. Also, I've tried to  
reproduce
this on OS X/Apache 2.2.8 prefork/ Perl 5.10 without any luck.

Can you post the exact details on how you built each of these ?

For me, it goes something like:

perl> ./Configure -des \
 -Doptimize=-g \
 -Dprefix=$HOME/opt/perl.org/perl/5.10.0/debug

For me:

perl-5.10.0> sh Configure -des \
 -Duseshrplib\
 -Dprefix=/usr/local/perl-5.10.0.d \
 -Doptimize='-g'

apache> CFLAGS="-g" ./configure \
 --with-included-apr \
 --with-mpm=prefork \
 --enable-maintainer-mode \
 --enable-modules=all \
 --neable-mods-shared=max \
 --prefix=$HOME/opt/apache.org/httpd/2.2.8/prefork-debug

For me:

httpd-2.2.8>export CPPFLAGS="-I/usr/local/include"
export LDFLAGS="-L/usr/local/lib"
export CFLAGS="-DAP_UNSAFE_ERROR_LOG_UNESCAPED -g"
./configure \
 --prefix=/usr/local/apache2 \
 --with-mpm=prefork \
 --enable-dav \
 --enable-dav-fs \
 --enable-log-config \
 --enable-authn-file \
 --enable-authz-host \
 --enable-authz-group \
 --enable-authz-user \
 --prefix=/usr/local/apache2.d \
 --enable-mods-shared="rewrite info worker proxy deflate mod_auth  
include ssl env mime-magic auth_digest expires dav dav_fs perl"

So I added the -g to CFLAGS. I didn't have that before. Instead I used  
--enable-maintainer-mode as documented in

  http://perl.apache.org/docs/2.0/devel/debug/c.html#Analyzing_Dumped_Core_Files

Is that out of date, perhaps?

mod_perl> perl Makefile.PL \
 MP_APXS=$HOME/opt/apache.org/httpd/2.2.8/prefork-debug/bin/apxs
 MP_MAINTAINER=1 \
 MP_DEBUG=1

For me:

mod_perl-2.0.4>/usr/local/perl-5.10.0.d/bin/perl Makefile.PL \
 MP_AP_PREFIX=/usr/local/apache2.d \
 MP_MAINTAINER=1 \
 MP_PROMPT_DEFAULT=1 \

The above URL doesn't have the MP_MAINTAINER=1 bit, but I followed  
your lead. Should it have that?

Ah, bloody hell! Now I get this:

# make
cd "src/modules/perl" && make
cc -I/usr/local/src/mod_perl-2.0.4/src/modules/perl -I/usr/local/src/ 
mod_perl-2.0.4/xs -I/usr/include/apr-1 -I/usr/include/apr-1  -I/usr/ 
local/apache2.d/include -fno-common -DPERL_DARWIN -no-cpp-precomp - 
DDEBUGGING -fno-strict-aliasing -pipe -I/usr/local/include -I/usr/ 
local/perl-5.10.0.d/lib/5.10.0/darwin-2level/CORE -DMOD_PERL -Wall - 
Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations -Werror  
-Wdeclaration-after-statement -DMP_COMPAT_1X -DMP_DEBUG -DMP_TRACE - 
DDARWIN -DSIGPROCMASK_SETS_THREAD_MASK -no-cpp-precomp -g  \
        -c mod_perl.c && mv mod_perl.o mod_perl.lo
In file included from /usr/local/perl-5.10.0.d/lib/5.10.0/ 
darwin-2level/CORE/perl.h:2382,
                 from modperl_perl_includes.h:65,
                 from modperl_common_includes.h:24,
                 from mod_perl.h:21,
                 from mod_perl.c:17:
/usr/local/perl-5.10.0.d/lib/5.10.0/darwin-2level/CORE/handy.h:85:1:  
error: "bool" redefined
In file included from /usr/include/mach-o/dyld.h:29,
                 from /usr/include/apr-1/apr_portable.h:166,
                 from /usr/local/apache2.d/include/http_protocol.h:31,
                 from modperl_apache_includes.h:30,
                 from mod_perl.h:20,
                 from mod_perl.c:17:
/usr/lib/gcc/i686-apple-darwin9/4.0.1/include/stdbool.h:36:1: error:  
this is the location of the previous definition
cc1: warnings being treated as errors
In file included from modperl_perl_includes.h:65,
                 from modperl_common_includes.h:24,
                 from mod_perl.h:21,
                 from mod_perl.c:17:
/usr/local/perl-5.10.0.d/lib/5.10.0/darwin-2level/CORE/perl.h:3969:  
warning: function declaration isn’t a prototype
In file included from modperl_io_apache.h:22,
                 from modperl_io.h:20,
                 from mod_perl.h:83,
                 from mod_perl.c:17:
/usr/local/perl-5.10.0.d/lib/5.10.0/darwin-2level/CORE/perliol.h:173:  
warning: function declaration isn’t a prototype
mod_perl.c: In function ‘modperl_response_handler’:
mod_perl.c:1019: warning: unused variable ‘rcfg’
make[1]: *** [mod_perl.lo] Error 1
make: *** [modperl_lib] Error 2

WTF? I could have sworn I built a debugging mod_perl before. Could it  
be choking on Perl 5.10 here, too?

Thanks,

David
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