sizeof(pointer) not detected

[Sara Wolfie]

The documentation says it should check for "using sizeof(pointer) instead of the size of pointed data", so why doesn't this code get flagged?

int main(void)
{
char junk;
char * pJunk = &junk;
unsigned long i;

i = sizeof(pJunk);
i += sizeof(&junk);

return i;

}

I used: cppcheck --enable=all test.c
(using cppcheck 1.83)

[Daniel Marjamäki]

sorry for late reply. Sometimes people do use sizeof(pointer) by intention. So we can't warn whenever there is sizeof(pointer) we only try to detect when you do it by mistake.

In your code example I don't think it looks like a mistake.

We should warn in such cases:

memset(pJunk, 0, sizeof(pJunk));

or :

p = (abc *)malloc(sizeof(abc *));