Fault Injection using systemtap

[Abhi Kolekar]

I am currently doing unit testing of my driver code and I want to do
unit testing with some fault injection code.

So my Question is
For the following module function

Function xyz(int a,int b,int c)
{
   int i,j,k;

   i=a+b;
--->I want to change the value of I at this statement How can I achieve
that using systemtap.

}
Thanks
Abhijeet