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[Frama-c-discuss] Getting a node from its id for a particular pdg

  • Subject: [Frama-c-discuss] Getting a node from its id for a particular pdg
  • From: Pascal.Cuoq at cea.fr (Pascal Cuoq)
  • Date: Fri, 20 Mar 2009 17:03:47 +0100
  • In-reply-to: <1237565188.3508.250.camel@supelec>
  • References: <1237387890.3508.114.camel@supelec> <49C116F4.5050507@sophia.inria.fr> <1237402185.3508.226.camel@supelec> <49C360A4.3010406@sophia.inria.fr> <1237565188.3508.250.camel@supelec>
>
> Now I think I figured out why I didn't get all of them before, it was
> caused by the way toto's declaration was written. If I replace in  
> the C
> file 'int toto (int x, int y);' by 'int toto (int,int);' (which is  
> still
> a valid C syntax I think, right ?), then '[Elem] 11 : b += z' (among
> other nodes) will no longer appear.
>
> Do you happen to get a similar result ?

You are right,
int toto(int, int);
int titi(int a, int b);

produce different default specifications.
As shown with option -print:

/*@ behavior generated:
       assigns \at(\result,Post) \from \nothing;
       */
extern int toto(int  , int  ) ;

/*@ behavior generated:
       assigns \at(\result,Post) \from a, b;
       */
extern int titi(int a , int b ) ;

This is a bug. Thanks for pointing it out.

Pascal

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