[Qt-creator] Very slow GDB when stepping into functions

[Andre Poenitz]

On Thu, Feb 04, 2010 at 06:36:21PM +0100, Peter Kümmel wrote:
> Maybe someone also wonders why stepping into a function
> takes several tens of seconds at 100% CPU usage of gdb.
> Here's the answer for Debian based systems: 
> 
> "Debugging symbols for ld.so are not shipped"
> http://blogs.gnome.org/jjongsma/2007/01/08/gdb-slowness/
> 
> Therefore this:
>    sudo apt-get install libc6-dbg
> solves the problems on my Ubuntu machine.
> 
> Could someone please update the QtCreator Wiki:
> http://qt.gitorious.org/qt-creator/pages/FrequentlyAskedQuestions#Debugger

That's interesting as I recently looked into a similar problem and
tracked it down to the use of the wrong algorithm for symbol lookup, see
http://sourceware.org/bugzilla/show_bug.cgi?id=11198 .

This particular issue has been fixed in the mean time in gdb.

I wonder whether our problems are related, and if so, how such
completely different solutions can be possible.

Could you do me a favour and check whether uninstalling the libc6-dbg
package and using a recent gdb from CVS also fixes your problem?

Andre'

PS: Of course we can add the hint to the FAQ.