validation/sizeof-function.c

   1 extern int fun(void);
   2 extern int (*ptr)(void);
   3
   4 static inline int inl(int *a)
   5 {
   6         return *a + 1;
   7 }
   8
   9
  10 int test(void);
  11 int test(void)
  12 {
  13         unsigned int s = 0;
  14
  15         // OK
  16         s += sizeof &fun;
  17         s += sizeof  ptr;
  18         s += sizeof &ptr;
  19         s += sizeof &inl;
  20
  21         // KO
  22         s += sizeof  fun;
  23         s += sizeof *fun;
  24
  25         s += sizeof *ptr;
  26
  27         s += sizeof  inl;
  28         s += sizeof *inl;
  29
  30         s += sizeof  __builtin_trap;
  31         s += sizeof *__builtin_trap;
  32
  33         return s;
  34 }
  35
  36 /*
  37  * check-name: sizeof-function
  38  * check-command: sparse -Wpointer-arith -Wno-decl $file
  39  *
  40  * check-error-start
  41 sizeof-function.c:22:14: warning: expression using sizeof on a function
  42 sizeof-function.c:23:14: warning: expression using sizeof on a function
  43 sizeof-function.c:25:14: warning: expression using sizeof on a function
  44 sizeof-function.c:27:14: warning: expression using sizeof on a function
  45 sizeof-function.c:28:14: warning: expression using sizeof on a function
  46 sizeof-function.c:30:14: warning: expression using sizeof on a function
  47 sizeof-function.c:31:14: warning: expression using sizeof on a function
  48  * check-error-end
  49  */