Re: instrumenting kernel functions by name

[Badari Pulavarty <pbadari at us dot ibm dot com>]

On Mon, 2005-03-14 at 13:30, William Cohen wrote:
> During my quest to look for insteresting points to instrument it seems 
> like I was rewriting it for each function I was trying out and 
> recompiling the my test instrumentation quite a bit. I was looking at 
> functions that were being called from a number of different places, so I 
> am using the hash functions in the SystemTap Runtime library to keep 
> statistics on a per caller basis. The attached 
> kprobes_where_funct.tar.gz has the source code. You will need to point 
> the build script in the executable to the appropriate place for the 
> SystemTap runtime libraries. The build script is a cheat; is used to 
> find out the address of the kallsym_lookup_name() even though it is not 
> exported.

BTW, kallsym_lookup_name() is now exported. You don't need to cheat
any more.

http://linus.bkbits.net:8080/linux-2.5/cset@1.1994.10.132?nav=index.html|ChangeSet@-7d

I pushed the patch few weeks ago (now its in mainline).

Thanks,
Badari