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Use when input variables are modified and reused for computation instead of using separate variables
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Basé sur la classification professionnelle SOC
| name | avoid-reusing-input-variables |
| description | Use when input variables are modified and reused for computation instead of using separate variables |
A KLEE-coverage code transformation. Applying it rewrites C source so symbolic execution explores more of the program's behavior.
When input variables are modified and reused for computation instead of using separate variables
Introduce a new variable to store the result of computations instead of modifying the original input variables
KLEE can better track constraints when input variables remain unchanged, as modifying inputs creates more complex symbolic expressions that are harder to reason about and may limit path exploration
Before:
#include<stdio.h>
int main(void)
{
int a,b;
scanf("%d %d",&a,&b);
a+=b;
if(a>23)a-=24;
printf("%d\n",a);
return 0;
}
After:
#include<stdio.h>
int main(){
int a,b,c;
scanf("%d %d",&a,&b);
c=a+b;
if(c>=24) c-=24;
printf("%d",c);
return 0;
}
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Use when code reads a fixed number of characters into an array and only accesses individual elements