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[Frama-c-discuss] PDG semantic

  • Subject: [Frama-c-discuss] PDG semantic
  • From: rovedy at ig.com.br (Rovedy Aparecida Busquim e Silva)
  • Date: Fri, 30 Nov 2012 18:30:31 -0200
Hi,

I have investigated the PDG plugin with the example below. I Know little
about PDGs.

I would like to Know the semantic of the PDG nodes and edges (e.g. what
does it mean blue edges, dark edges, and dotted edges?
And about the color of the nodes? What are circle nodes, rectangle nodes,
... ). Is there some reference for reading?

Is it possible use the PDG to help the value analysis? Maybe with the
slevel?

I attached the graphs.

I would like to know if is possible to create a Control Flow Graph as
showed in the attached figure.  Exist another plugin for this or another
way to obtain the same information?

Best regards,
Rovedy

//-------------------------------------------------------------------------------------------------


void main()
{
int a=0,b=0,c=0;

 a=4;

if ( a > 5 )
{
   b = 3;
   c = a + 5;
   return ;
}
else
{
   b = 4;
   a = foo(a);
   c = a+5;
}
}
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