[Cocci] How to write SmPL patch to handle for-each macros?

[Cocci] How to write SmPL patch to handle for-each macros?

[Quentin Young]

Hi there, I was wondering how to handle this situation in SmPL. I have a
codebase that defines a couple macros for use within for loops, mostly used to
iterate lists, like this:

for (LIST_ELEMENTS(…)) {
   /* blah blah */
}

I’m having trouble figuring out how to write a rule that matches these for
statements without resorting to doing preprocessor expansion before I run
spatch. The semantics I’m trying to achieve are:

@@
…
@@

for (LIST_ELEMENTS(…)) {
   /* stuff I want to match is here */
}

Could I get some help? Barring that, I’d also take a link to the appropriate
documentation, if I’ve missed it. Thanks in advance.

Quentin
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Re: [Cocci] How to write SmPL patch to handle for-each macros?

[Julia Lawall]

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On Wed, 3 Jul 2019, Quentin Young wrote:

> Hi there, I was wondering how to handle this situation in SmPL. I have a
> codebase that defines a couple macros for use within for loops, mostly used to
> iterate lists, like this:
>
> for (LIST_ELEMENTS(…)) {
>    /* blah blah */
> }
>
> I’m having trouble figuring out how to write a rule that matches these for
> statements without resorting to doing preprocessor expansion before I run
> spatch. The semantics I’m trying to achieve are:
>
> @@
> …
> @@
>
> for (LIST_ELEMENTS(…)) {
>    /* stuff I want to match is here */
> }
>
> Could I get some help? Barring that, I’d also take a link to the appropriate
> documentation, if I’ve missed it. Thanks in advance.

Perhaps it will work to put something in standard.h

#define LIST_ELEMENTS(a,b,c) ;;

You can also make your own file of macro definitions and pass them in with
--macro-file

julia


>
> Quentin
> _______________________________________________
> Cocci mailing list
> Cocci@systeme.lip6.fr
> https://systeme.lip6.fr/mailman/listinfo/cocci
>

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