On Thu, Jun 10, 2010 at 08:57:15PM +0300, Emre Erenoglu wrote:
On Thu, Jun 10, 2010 at 5:02 PM, Matthias Bolte < matthias.bolte@googlemail.com> wrote:
2010/6/10 Emre Erenoglu <erenoglu@gmail.com>: The initscript explicitly starts the one in /usr/sbin. If you just start libvirtd manually without an absolute path then you'll start the one in /usr/local/sbin. This might explain why you cannot reproduce the segfault manually, but it doesn't explain why the segfault happens.
There's no other installation of libvirt in the system. I can also reproduce the same thing in all Pardus machines, so I believe it's something in libvirt not doing well with something else in our service init mechanisms.
I guess I'd put money on some environment variable causing trouble. It could be a *missing* environment variable that we expect to always be set, or something like that
Could you provide a GDB backtrace of the segfault? The syslog entry only says that it crashed in libc, that's not enough information to debug the segfault.
Unfortunately, I can't find a related core file in the system. In fact, core file is not generated. I'll also try to fix this out and come back to the list.
Getting a backtrace would be simpler if you could reproduce the problem manually. In that case you could just start libvirtd in GDB. But getting a backtrace from a coredump will work too.
I can't reproduce the segfault when I run it manually. It only happens when it's run from this python script. I will try to initialize gdb inside the script and connect remotely to the gdb session, but it's getting a bit over my debugging capabilities :) For example, I don't know how to assign the symbols and source code etc from the package build directory to gdb.
Try creating a wrapper script, eg mv /usr/sbin/libvirtd /usr/sbin/libvirtd.real cat > /usr/sbin/libvirtd <<EOF #!/bin/sh cd /tmp ulimited -c unlimited exec /usr/sbin/libvirtd.real EOF chmod +x /usr/sbin/libvirtd That will hopefully give you a core dump in /tmp you can get get a stack trace from Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://deltacloud.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|