[antlr-interest] How to use ANTLR to find function pointers

[Johannes Luber]

amol Bhagavat wrote:
> Ok if i get a proper c grammer, i can easily find out function pointers
> in that ...
> Is it possible to find the different assignments done to function
> pointers in source code?

Well, once you have the knowledge that variable X is a function pointer,
you need only to track the use of the variable. That can be done by a
simple lookup in assignments, etc. Keep in mind that you can not only
assign a function to a pointer variable, but other pointer variables as
well. Or even casting a function pointer to an int. Nasty stuff.

Best regards,
Johannes Luber

> 
> */Johannes Luber <jaluber at gmx.de>/* wrote:
> 
>     amol Bhagavat wrote:
>     > Hi,
>     >
>     > I am developing a tool where i need to parse a c project code and find
>     > out all occurances of function pointers along with all
>     assignments. Also
>     > i need to create a output where i can specify the files where
>     > the function pointers and functions are defined.While finding function
>     > pointers i also need to aware of variable scope, since there can be
>     > occurance of local variable with same name.
>     > I am very new to ANTLR ...
>     > Please let me know can i use ANTLR ? how i can use it?
>     > My intention is to find out all the possibilities of function call
>     > through a function pointer.
>     >
>     > Thanks in advance...
>     >
>     > Regards,
>     > Amol
> 
>     At first, I would recommend to buy the ANTLR book
>     . It is really
>     helpful, especially, because it contains an example, on which you can
>     build upon. Alternatively you can look at the source code of the CMinus
>     example on the same website. That's for understanding only. You'd need a
>     C grammar, too. Maybe it has been posted one on the grammar site
>     (somewhere on antlr.org).
> 
>     On your special I would then generate an AST containing only the
>     functions and function pointers and then a tree grammar, which can
>     output the required information. Sorry I can't be more specific at this
>     stage!
> 
>     Best regards,
>     Johannes Luber
> 
> 
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