gcc/testsuite/gcc.dg/Wstringop-overflow-10.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -Wstringop-overflow" } */
   3
   4 void
   5 foo (char *a)
   6 {
   7   char b[16] = "abcdefg";
   8   __builtin_strncpy (a, b, __builtin_strlen (b));       /* { dg-warning "specified bound depends on the length of the source argument" } */
   9 }
  10
  11 void
  12 bar (char *a)
  13 {
  14   char b[16] = "abcdefg";
  15   __builtin_strncpy (a, b, __builtin_strnlen (b, 8));   /* { dg-warning "specified bound depends on the length of the source argument" } */
  16 }
  17
  18 void
  19 baz (char *a)
  20 {
  21   char b[16] = "abcdefg";
  22   __builtin_strncpy (a, b, __builtin_strnlen (b, 7));   /* { dg-bogus "specified bound depends on the length of the source argument" } */
  23 }
  24
  25 void fill (char *);
  26
  27 void
  28 qux (char *a)
  29 {
  30   char b[16];
  31   fill (b);
  32   __builtin_memcpy (b, "abcdefg", 7);
  33   __builtin_strncpy (a, b, __builtin_strnlen (b, 8));   /* { dg-bogus "specified bound depends on the length of the source argument" } */
  34 }