CWARN.HIDDEN.PARAM
Parameter hidden by local variable
The CWARN.HIDDEN.PARAM checker finds instances in which a local variable hides a parameter.
Vulnerability and risk
Since a program will always use the variable closest in scope, local variables can hide the parameters of their containing functions and make those parameters unreachable. When this unintended behavior occurs, the consequences can be unexpected.
Vulnerable code example
Copy
void foo(int a) {
int a = 0;
if (a > 3) {...}
In this example, Klocwork flags line 2 to indicate that local variable 'a' is hiding the function parameter.