Frama-C-discuss mailing list archives

This page gathers the archives of the old Frama-C-discuss archives, that was hosted by Inria's gforge before its demise at the end of 2020. To search for mails newer than September 2020, please visit the page of the new mailing list on Renater.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Frama-c-discuss] [frama-c] def information of statement which contain a pointer value

  • Subject: [Frama-c-discuss] [frama-c] def information of statement which contain a pointer value
  • From: abiao.yang at gmail.com (Yang)
  • Date: Thu, 2 Aug 2012 09:17:25 +0800
Dear all:
 I want to get def information of a statement in frama-c. While there
exists a pointer in a statement, the results is not what I thought it
should be.
 The following stupid function is to exchange two values.

1 int swap( int *x, int *y)
2 {
3 int temp1 = *x;
4 int temp2 = *y;
5 *x = temp2;
6 *y = temp1;
7 }

In this function, x and y are pointers to int value. In line 5 and 6, x and
y are reassigned to new values respectively. In my previous view, I thought
x and y are def value in these two statement. But when I use Usedef module
in frama-c to get the def values of these two statement. none defs
returend. Why frama-c do not treated x and y to be def values?

Looking forward to your reply.


Best regards,
 Ben
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.gforge.inria.fr/pipermail/frama-c-discuss/attachments/20120802/a2a24fed/attachment.html>