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List:       kde-devel
Subject:    Re: Debugging with less memory?
From:       Constantin Berzan <exit3219 () gmail ! com>
Date:       2007-06-11 5:54:31
Message-ID: 200706110854.34131.exit3219 () gmail ! com
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On Sunday 10 June 2007 23:54, Thomas McGuire wrote:
> Hello,
> 
> On Sunday 10 June 2007, Constantin Berzan wrote:
> > Hello list,
> > I have recently started on KDE 4 development, so I've got lots of things 
to
> > learn from you ;)
> 
> > I'm using KDE_DEBUG=1 to get a core file, and load it in GDB.
> Why not use KDevelop for debugging? Much more convenient. See 
> 
http://techbase.kde.org/Getting_Started/Set_up_KDE_4_for_development#KDevelop

Thanks for the suggestion, I will probably do that with my next distro upgrade 
(my GDB is too old in Kubuntu Edgy). Besides, I kind of like VIM =)

> 
> > There seems 
> > to be a lot of "loading of symbols" from various libraries, and what 
> > remains of my meager 693MB of RAM gets filled-up very fast. Then the 
system
> > starts swapping and after a few painful minutes I get the gdb prompt and
> > can finally issue "bt". By that time more than half of my swap space (1GB)
> > is in use.
> >
> > I was wondering whether you know some way to avoid this high memory usage.
> > Is it possible to get a backtrace without all those symbols loaded? Or how
> > do I skip loading some symbols, libQt3support for example, which I'm sure
> > I'm not using?
> I unfortunately don't know how to load less symbols, I would use that myself 
I 
> guess. 
> 
> > If there's a quicker way to get the first part of the backtrace (the first
> > 5 frames, for example), without caring to know the rest, I'd be very
> > interested to know that as well, since that can usually point out where 
the
> > problem is.
> KDevelop does the "show only 5 frames" thing automatically.
> 
> I can only recommend getting more RAM. I only had 384 MB before, and 
debugging 
> was a horrible experience. Now, I've got 2 GB, and everything is quite fast, 
> no swap used at all.
> 
> Regards,
> Thomas
> 
> 
>  
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> 

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