Profiling support in glibc?

Profiling support in glibc?

[Brian Murphy]

What is the status of profiling in glibc? Our (egcs-1.1.2 based)
compiler fails with a missing symbol
_start (glibc 2.0.6) but even if one fixes this up there are more
fundamental problems.

Is there a later glibc for which profiling works?

/Brian

Re: Profiling support in glibc?

[Ralf Baechle]

On Mon, Jun 18, 2001 at 09:07:15PM +0200, Brian Murphy wrote:

> What is the status of profiling in glibc? Our (egcs-1.1.2 based)
> compiler fails with a missing symbol
> _start (glibc 2.0.6) but even if one fixes this up there are more
> fundamental problems.
> 
> Is there a later glibc for which profiling works?

I've never tried profiling but remember from looking at the source of
glibc 2.0.6 that there were rather obvious bugs.  Also you shouldn't
assume that anybody of the core developers has interest in wasting any
work into 2.0.6 since 2.2 is so much better so you may want to upgrade
anyway.

The other issue is of course gprof ...

  Ralf

Re: Profiling support in glibc?

[Greg Satz]

Oddly enough I didn't have to make any changes to gprof. I used the version
in binutils-2.11.90.0.1.

Thanks,
Greg

on 6/18/01 2:25 PM, Ralf Baechle at ralf@oss.sgi.com wrote:

> The other issue is of course gprof ...

Re: Profiling support in glibc?

[Greg Satz]

I was able to get profiling working using glibc-2.2.2 and gcc-2.95.3. Both
packages needed changes. The compiler had a stack misalignment correction
for glibc. Glibc didn't save all the registers nor treat sp/fp correctly.
Currently files compiled with -pg need to be linked -static. Specs need to
be updated to do this automatically.

I will send diffs if there is any interest.

Thanks,
Greg

on 6/18/01 1:07 PM, Brian Murphy at brian@murphy.dk wrote:

> 
> What is the status of profiling in glibc? Our (egcs-1.1.2 based)
> compiler fails with a missing symbol
> _start (glibc 2.0.6) but even if one fixes this up there are more
> fundamental problems.
> 
> Is there a later glibc for which profiling works?
> 
> /Brian
> 

Re: Profiling support in glibc?

[H . J . Lu]

On Mon, Jun 18, 2001 at 03:05:18PM -0600, Greg Satz wrote:
> I was able to get profiling working using glibc-2.2.2 and gcc-2.95.3. Both
> packages needed changes. The compiler had a stack misalignment correction
> for glibc. Glibc didn't save all the registers nor treat sp/fp correctly.
> Currently files compiled with -pg need to be linked -static. Specs need to
> be updated to do this automatically.
> 

The next release of my mips toolchain should be as good as the x86
version in RedHat 7.1. If you can send me patches against binutils,
glibc and gcc under

http://ftp.kernel.org/pub/linux/devel/binutils/mips/

I will take a look to see if I can include them in my next release.


H.J.

Re: Profiling support in glibc?

[Andreas Jaeger]

Greg Satz <satz@ayrnetworks.com> writes:

> I was able to get profiling working using glibc-2.2.2 and gcc-2.95.3. Both
> packages needed changes. The compiler had a stack misalignment correction
> for glibc. Glibc didn't save all the registers nor treat sp/fp correctly.
> Currently files compiled with -pg need to be linked -static. Specs need to
> be updated to do this automatically.
> 
> I will send diffs if there is any interest.

Please send me diffs for glibc,

Andreas
-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.inka.de
    http://www.suse.de/~aj

Re: Profiling support in glibc?

[Brian Murphy]

> I will send diffs if there is any interest.
> 
>

Yes please.

/Brian