Re: Question about core files

Holger Kiehl wrote:

> >> Most the time I compile my application without the -g option due to
> >> performance reasons.
> >
> > The -g switch has absolutely no effect upon performance. It simply
> > causes and additional section to be added to the resulting binary.
> > When the program is run normally (i.e. not under gdb), that section
> > won't be mapped. The only downside to -g is that it increases the size
> > of the file.
> 
> But when executing the program will it not read the whole binary which
> is much larger with debug information and so will take longer (just the
> first reading of the binary)?

No. Binaries aren't "read", they're mapped (with mmap); pages are read
into memory on demand. The loader only maps the sections which are
actually required, which doesn't include the debug sections.

--

-- 
Glynn Clements <glynn <at> gclements.plus.com>
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