Okay, I've been staring at this problem for close to 48 hours straight
now and have finally narrowed it down to a set of lines of code.
So let me first expand.
I currently have a system running, with Apache 1.3.14 and Mod_Perl 1.24
on Redhat 7.0 (yeah REALLY REALLY ancient) and Perl 5.005003. It also
has mod_ssl, and several other modules loaded, but for the sake of the
problems I am having, I completely removed those.
This actually runs perl scripts that connect and talk to (yeah dig
this), Postgres, Mysql, and Informix. The root of my problems, as I
have finally found, is Informix.
In our httpd.conf, we utilize a PerlScript directive to preload a bunch
of environment variables, and other stuff at startup. The script is
pretty nasty and harry, and buried deep within it happened to be a call
to Informix.
So for the record, the current system (ancient stuff) works.
So the problems began. I decided to upgrade to Apache 1.3.26 and
Mod_Perl 1.27 on Debian Woody (3.0) and Perl 5.006001. I also built all
the other libraries, and than the fun began.
At first, I just got seg faults attempting to start apache. But as I
have said above, I have narrowed it down to a set of lines of code that
cause it to fail.
So if I build Apache 1.3.26 and Mod_perl 1.27 by themselves, using
pretty straight forward options..
Apache
------
CC="gcc" \
CFLAGS="-g" \
LIBS="-L/home/grumple/src/test/lib
-L/home/grumple/src/test/system/lib " \
./configure \
"--prefix=/home/grumple/src/test/system" \
"--enable-module=most" \
"--enable-shared=max" \
"--with-layout=GNU" \
"--disable-rule=EXPAT" \
"$@"
----------------------
and
Mod_perl
--------
perl Makefile.PL PERL_USELARGEFILES=0 PERL_DEBUG=1 USE_APXS=1
WITH_APXS=/home/grumple/src/test/system/sbin/apxs EVERYTHING=1
INC=/home/grumple/src/test/system/include
----------------------
and than my conf
httpd.conf
----------
AccessConfig /dev/null
ResourceConfig /dev/null
LoadModule env_module libexec/mod_env.so
LoadModule config_log_module libexec/mod_log_config.so
LoadModule mime_module libexec/mod_mime.so
LoadModule autoindex_module libexec/mod_autoindex.so
LoadModule dir_module libexec/mod_dir.so
LoadModule alias_module libexec/mod_alias.so
LoadModule access_module libexec/mod_access.so
LoadModule auth_module libexec/mod_auth.so
LoadModule setenvif_module libexec/mod_setenvif.so
AddModule mod_env.c
AddModule mod_log_config.c
AddModule mod_mime.c
AddModule mod_autoindex.c
AddModule mod_dir.c
AddModule mod_alias.c
AddModule mod_access.c
AddModule mod_auth.c
AddModule mod_setenvif.c
ServerType standalone
ServerRoot "/home/grumple/src/test/system"
PidFile /var/tmp/run/test.pid
LockFile /var/tmp/test.lock
ScoreBoardFile /var/tmp/test.scoreboard
Timeout 300
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 15
MinSpareServers 2
MaxSpareServers 10
StartServers 3
MaxClients 256
MaxRequestsPerChild 1000
LoadModule perl_module libexec/libperl.so
AddModule mod_perl.c
ServerName grumple
Port 6180
Listen 6180
ServerAdmin yeah@right
DocumentRoot /home/grumple/src/test/www/htdocs
<Directory />
Options FollowSymLinks
AllowOverride None
</Directory>
<Directory "/home/grumple/src/test/www/htdocs">
Options FollowSymLinks
AllowOverride None
Order allow,deny
Allow from all
</Directory>
DirectoryIndex index.tp index.htm index.html index.cgi
AccessFileName .htaccess
<Files .htaccess>
Order allow,deny
Deny from all
</Files>
UseCanonicalName On
TypesConfig "/home/grumple/src/test/system/etc/httpd/mime.types"
DefaultType text/plain
HostnameLookups Off
LogLevel warn
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
CustomLog "/var/tmp/logs/test.access" combined
ErrorLog "/var/tmp/logs/test.errors"
ReadmeName README
HeaderName HEADER
IndexOptions FancyIndexing
IndexIgnore .??* *~ *# HEADER* README* RCS CVS *,v *,t
AddEncoding x-compress Z
AddEncoding x-gzip gz
AddHandler send-as-is asis
AddHandler imap-file map
BrowserMatch "Mozilla/2" nokeepalive
BrowserMatch "MSIE 4\.0b2;" nokeepalive downgrade-1.0 force-response-1.0
BrowserMatch "RealPlayer 4\.0" force-response-1.0
BrowserMatch "Java/1\.0" force-response-1.0
BrowserMatch "JDK/1\.0" force-response-1.0
AddHandler cgi-script .cgi
PerlScript /var/tmp/test.pl
AddType application/x-x509-ca-cert .crt
AddType application/x-pkcs7-crl .crl
ErrorDocument 404 /index.tp
----------------------
And here's the magical part, the test.pl script that causes the problem.
test.pl
-------
BEGIN {
unshift(@INC, qw(
/home/grumple/src/test/lib/perl5
/home/grumple/src/test/system/lib/perl5
));
}
use strict;
use DBI;
use DBD::Informix;
## informix connection params
$ENV{'INFORMIXDIR'} ||= '/opt/informix';
$ENV{'INFORMIXSERVER'} ||= 'test_tcp';
$ENV{'LD_LIBRARY_PATH'} .= ":$ENV{'INFORMIXDIR'}/lib";
my $catalog = 'test';
my $constr = join(':', 'dbi', 'Informix', $catalog);
my $user = 'test';
my $password = 'test';
my $dbh = DBI->connect($constr,$user,$password);
$dbh->disconnect();
1;
----------------------
So all looks good right? Well it does, other than running above yields
the following crash in GDB.
Program received signal SIGSEGV, Segmentation fault.
0x400e7a90 in free () from /lib/libc.so.6
(gdb) bt
#0 0x400e7a90 in free () from /lib/libc.so.6
#1 0x40255d3b in Perl_safefree () from /usr/lib/libperl.so.5.6
#2 0x402705eb in Perl_sv_clear () from /usr/lib/libperl.so.5.6
#3 0x4027088f in Perl_sv_free () from /usr/lib/libperl.so.5.6
#4 0x40274d6f in Perl_sv_vcatpvfn () from /usr/lib/libperl.so.5.6
#5 0x4026a378 in Perl_sv_add_arena () from /usr/lib/libperl.so.5.6
#6 0x4026a434 in Perl_sv_clean_all () from /usr/lib/libperl.so.5.6
#7 0x40219b75 in perl_destruct () from /usr/lib/libperl.so.5.6
#8 0x401bbb77 in perl_shutdown (s=0x0, p=0x0) at mod_perl.c:294
#9 0x401bc507 in mp_dso_unload (data=0x8094bdc) at mod_perl.c:489
#10 0x08050c39 in run_cleanups (c=0x80a06cc) at alloc.c:1713
#11 0x0804f2d5 in ap_clear_pool (a=0x8094bdc) at alloc.c:538
#12 0x08060bfc in standalone_main (argc=6, argv=0xbffffac4) at http_main.c:5058
#13 0x080615cc in main (argc=6, argv=0xbffffac4) at http_main.c:5448
The test.pl script works fine by it's self. Turning on full PERL
debugging/tracing yields that the actual script has fully finished, and
that it's in the tear down of the actualy perl stuff that this failure
is coming from. Not from the script per se. But it is the script that
is causing this problem. Commenting out the connect and disconnect
lines causes the server to startup and function just fine.
So I'm not quite sure what to do. I know I can get my entire system
working if I don't make the calls to Informix at startup (it appears
it's purely the connect that causes the error (whether it's a good
connect or not, I tried giving it a bogus password, and it still
crashes)), but well that's kind of a pain in the butt.
So if anyone has ANY clues, it would be sincerely appreciated, as I need
sleep, and I also would love to get this working.
Thanks a ton in advance.
Greg
--
Greg Rumple
[EMAIL PROTECTED]
