Hello Stefan,
unfortunately the gdb problem is still there, and it stops the debug
process. Therefore I tried it with ExceptionHooks and the core.dump
module, to get something out of the apache:
# gdb --args /usr/sbin/apache.dbg -F -X -f /etc/apache/httpd.conf
GNU gdb 6.4.90-debian
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you
are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for
details.
This GDB was configured as "i486-linux-gnu"...Using host libthread_db
library "/lib/tls/libthread_db.so.1".
(gdb) run
Starting program: /usr/sbin/apache.dbg -F -X -f /etc/apache/httpd.conf
[Thread debugging using libthread_db enabled]
Error while reading shared library symbols:
Cannot find new threads: generic error
Cannot find user-level thread for LWP 9920: generic error
(gdb) bt
#0 0xb7ff7010 in _dl_debug_state () from /lib/ld-linux.so.2
#1 0xbfffd860 in ?? ()
#2 0xb7fedc35 in dl_main () from /lib/ld-linux.so.2
#3 0xb7ffa3e8 in _dl_sysdep_start () from /lib/ld-linux.so.2
#4 0xb7febb46 in _dl_start () from /lib/ld-linux.so.2
#5 0xb7feb7b7 in _start () from /lib/ld-linux.so.2
This Cannot find user-level thread for LWP 9920: generic error gdb issue
might came in because of the old kernel, that is used on my vserver:
# uname -a
Linux px11.ncsrv.de 2.6.9-023stab044.11-smp #1 SMP Sat Sep 29 13:36:25
MSD 2007 i686 GNU/Linux
# apt-cache policy `dpkg -S /lib/ld-linux.so.2|awk -F: '{print $1}'`
libc6:
Installed: 2.3.6.ds1-13etch2
Candidate: 2.3.6.ds1-13etch2
Version table:
*** 2.3.6.ds1-13etch2 0
500 http://ftp.de.debian.org stable/main Packages
100 /var/lib/dpkg/status
Bizarre, that the option -X doesn't avoid the threaded start of apache.
I thought that option ensures, that apache will start in a single
process?
# man apache |egrep "\-X"
Reformatting apache(8), please wait...
apache [ -X ] [ -F ] [ -R libexecdir ] [ -d serverroot ] [ -f
config ]
-X Run in single-process mode, for internal debugging
purposes
Even without -F and -f /etc/apache/httpd.conf I got the LWP eror again.
How can I ensure, that the bibc6 debug symbols are used? I'm afraid,
that they are not used by apache.dbg?
I'm stuck, but I'll try to do some trial and error with the modules
though.
Is there a `lsmod` for apache modules?
# /usr/sbin/apache.dbg -l
Compiled-in modules:
http_core.c
mod_so.c
mod_macro.c
suexec: disabled; invalid wrapper /usr/lib/apache/suexec
# egrep LoadModule /etc/apache/modules.conf|awk -F/ '{print $6}'
mod_log_config.so
mod_log_agent.so
mod_log_referer.so
mod_log_forensic.so
mod_mime_magic.so
mod_mime.so
mod_status.so
mod_info.so
mod_dir.so
mod_alias.so
mod_rewrite.so
mod_access.so
mod_auth.so
mod_setenvif.so
libphp5.so
What modules should I disable for debug purposes?
Thank you for your help!
Gerhard
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