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Re: [Valgrind-developers] Memcheck optimisation level; Makefile.amincludes

On Wed, 25 Aug 2004, Florian Weimer wrote:

So why are the total file sizes larger with -fomit-frame-pointer? 

Have you already ruled out debugging information?  Since you compile
with -g, this seems the most likely culprit.  (If there is not frame
pointer, more debugging information is needed to access local
variables, so this growth isn't really avoidable.)

Ah, I didn't think of that, I think it answers the question... for vgskin_lackey.so, I get the following sizes:

  normal:               26577
  -fomit-fp:            27299

  normal stripped:       7780
  -fomit-fp stripped:    7748

The stripped versions look as expected, ie. with -fomit-fp it is smaller. It's interesting to see this effect, and good to know why it occurs.


On Wed, 25 Aug 2004, Andrew Haley wrote:

Unwind info?

I guess not, since it seems to be the debug info.

(The code is all C, I should have mentioned that... is unwind info for C++ only? Either way, seems like it doesn't matter.)


Thanks very much, everyone!

N

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