[Libguestfs] simplify debugging of guestfsd

[Olaf Hering]

On Fri, Sep 21, Richard W.M. Jones wrote:

> On Fri, Sep 21, 2012 at 03:40:35PM +0200, Olaf Hering wrote:
> > gdb is certainly more advanced, something like 'var="gdb --readnow -ex r
> > -ex bt -ex quit' ; $var guestfsd' would be good enough, or gdb
> > --command=FILE.
> > As you say, without adding debuginfo into guest the backtrace would be
> > not that useful. But its better than nothing.
> 
> glibc -- on Fedora -- prints a stack trace on exit, so we've not had a
> need to get one out using gdb.  A core dump would be the really useful
> thing for us.

How does it do that, via a segfault handler? I mean, is that a private
patch or something in upstream glibc?

Olaf