[Bug c/16794] New: should warn about switched memset arguments

["martin at v dot loewis dot de" <gcc-bugzilla at gcc dot gnu dot org>]

gcc should issue a warning for the code

#include <string.h>

int main(int argc, char*argv[])
{
        memset(argv[0], strlen(argv[0]), 0);
        return 0;
}

as passes a size_t for the "int c" argument, and 0 for the "size_t n" argument.
This is a common programmming mistake, as the order of arguments to memset is
counter-intuitive. Trigger for this warning could either be that the size_t
argument is in the wrong position, or that a size of 0 is passed, making the
function call have no effect. The warning should hint that possibly the argument
order should be switched.

-- 
           Summary: should warn about switched memset arguments
           Product: gcc
           Version: 3.4.1
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: martin at v dot loewis dot de
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i486-linux
  GCC host triplet: i486-linux
GCC target triplet: i486-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16794