Re: extracting data access from functions

[Bart Trojanowski <bart-LIbhotJ4rFdeoWH0uzbU5w@public.gmane.org>]

* Arnaldo Carvalho de Melo <acme-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> [090127 10:27]:
> With DWARF you can:
> 
> 1. find out struct layout
> 2. find which functions have parameters of the type you want
> 3. find which functions have variables of the type you want
> 4. Know where such variables and parameters are on memory
>    using DWARF location expressions (google for loc2c)
> 
> And that is it.

Thanks for the quick reply and clarification.

> Then... you would need to use libdisasm, that is part of elfutils but is
> still a bit rough, being designed mostly for what you get from the
> binutils utilities disassembly options.
>
> Combinining the above you will be able to do what you want.

That sounds interesting, but unfortunately the man pages notes that...
>> The x86-64 architecture is not supported..LP
... being ia32-only makes it a no go for me.

Is there another route you could think of that is not platform-specific?

I guess binutils/objdump doesn't actually understand what's happening it
just links it back to the code.  Hmm... and things like gdb are aware of
things because they are platform specific.

> I want to look at usage patterns to figure out what are the member
> working sets to pass that to my struct member reorganizing routines, run
> with performance counters before/after, all automated, and reap the
> profits 8)

I hear ya. :)

Thanks again.

-Bart

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