Re: analyzing dependencies in code

On Nov 16, 1:42 pm, eliben <eli...@gmail.com> wrote:
> Hello,
>
> I have a bunch of rather convoluted C code that uses a lot of global
> variables. I'm trying to see if I can devise some automatic way of
> analyzing this code, helping me understand it.
> Suppose I can obtain the AST for this code (using c2c). I want to
> analyze the AST and, given some global variable V, understand which
> other global variables it affects, and what functions can be called as
> a result of a change in it.
>
> I tried approaching this the ad-hoc way, but it's becoming
> complicated. I see some parallels to dataflow analysis here, though it
> seems to be a bit different.


why would it be different? It is the same as data flow analysis,
except that you need to create a def-use chain only for globals.


> Any ideas of proven methods to do this right ?


can't think of why anyone would want to re-invent the wheel or how the
other technique would be more efficient than data flow analysis.


regards
-kamal

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