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[Frama-c-discuss] Pointer comparable warnings and NULL test for parameter

  • Subject: [Frama-c-discuss] Pointer comparable warnings and NULL test for parameter
  • From: benoit.gerard at (benoit.gerard at
  • Date: Wed, 20 Mar 2013 09:49:06 +0100

Dear all,
When trying to analyse a function using value I get \pointer_comparable 
warnings for each test on pointer parameters (== NULL).
I did not manage to understand why it does so: the only clue I found is a 
post on the blog that considers more advanced situations than just 
comparing a pointer to NULL.
I have no particular background in program verification so may be the 
answer is obvious but I would like to know if it is possible to do 
something to remove those warnings. Below is a simple (and typical) 
example of program that lead to such warning.
#define NULL ((void*)0)

void f (int *tab)
  if ( tab != NULL )
  // some functional code
  // some error code
Best Regards,

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