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Re: Debugging a large program
On Mon, Oct 04, 2004 at 04:21:28PM -0700, Nick Savoiu wrote:
> ----- Original Message -----
> From: "Daniel Jacobowitz" <drow@false.org>
> To: "Nick Savoiu" <savoiu@ics.uci.edu>; <gdb@sources.redhat.com>
> Sent: Monday, October 04, 2004 3:14 PM
> Subject: Re: Debugging a large program
>
>
> > On Mon, Oct 04, 2004 at 05:15:14PM -0400, Daniel Jacobowitz wrote:
> > > > BTW, 405MB was for gdb running to main() not just what I said above :)
> There
> > > > probably are a few global variables but I don't think they should take
> up
> > > > too much space.
> > >
> > > That requires loading symbol information for all the shared libraries,
> > > which is probably what's taking all the space. 400MB+ is a bit
> > > unusual, but I don't know how big your libraries are.
> >
> > Your libraries contain 288MB of DWARF2 debug information. We're
> > winding up with less than twice that in memory usage for reading in
> > partial symbols. It probably could be reduced somewhat - say, 30%.
> > But some of this data we've just got to hold in memory.
>
> I see. If one of the .so files is not actually used, can I somehow prevent
> GDB from loading even its partial symbols? How much memory do partial
> symbols use?
Partial symbols are most or all of that memory. Try "set
auto-solib-add 0", followed by "sharedlibrary REGEXP-YOU-WANT-LOADED".
--
Daniel Jacobowitz