CWARN.PASSBYVALUE.ARG

Function argument passed by value is too large

The CWARN.PASSBYVALUE.ARG checker finds instances in which a function argument passed by value is too large.

Vulnerability and risk

Passing by value is not necessarily an error, but it can cause a performance loss because of the amount of data copied.

Vulnerable code example

1  struct strcture{
2    int x[20];
3    char y[100];
4    int z[20];
5  };
6  
7  void foo(strcture arg) 
8  {}

Klocwork flags line 7, in which the argument arg is too large.

Related checkers

• CWARN.PASSBYVALUE.EXC