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Re: gprof/sprof and shared libraries...again

On Thu, Apr 04, 2002 at 09:00:40AM -0500, Braman, Paul wrote:
> This discussion seems to creep up from time to time but I haven't seen
> anyone post positive results (that I can replicate).
> Our RedHat installation here at work is a slightly modified 7.2 (we have a
> RedHat contractor on-site who's coordinating our setup).  I can't seem to
> get a profile for a shared library the way I think I should.
> First off, what I expect as output from my work is not a profile of the
> calls *in* the library, but a profile of the calls *to* the library.  (The
> linker knows what calls are being made to the library and should be able to
> put timing information around those calls.)

Then, you need to compile your work with -g.

> I've got a small library with one function,  I've got a small
> main that calls an internal function once and a function from the library
> once.  I can get a profile for the call to the internal function just fine,
> but nothing I've done has generated information for a call to the function
> in the library.
> Commands I am running...
>     export
>     export LD_PROFILE_OUTPUT=/home/user/proftest
>     g++ -g -fPIC -c -o prof.lo prof.cpp
>     g++ --shared -o prof.lo
>     g++ -g -pg -I/home/user/proftest -c -o ptest.o ptest.cpp
>     g++ -pg -o ptest ptest.o -L/home/user/proftest -lprof \
>         -Xlinker -rpath -Xlinker /home/user/proftest
>     /home/user/ptest

It profiles That is the calls made from


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