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[Frama-c-discuss] using errno

  • Subject: [Frama-c-discuss] using errno
  • From: stephane.duprat at atosorigin.com (Stéphane Duprat)
  • Date: Sat, 07 Nov 2009 00:20:20 +0100
Hi again,

Is someone know how to treat errno ?
The cil create a pointer not allowed and after an access to the
location.

thx,

St?phane

src code:
  if (errno == 0) j=2;

the cil:
  int *tmp ;
  { /*undefined sequence*/  tmp = __errno_location(); ; }
  /*@ assert \valid(tmp);
          // synthesized
       */
  if (*tmp == 0) { j = 2; }

warning:
warning: out of bounds read. assert \valid(tmp);
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