gcc/testsuite/gcc.dg/pr83373.c

   1 /* PR middle-end/83373 - False positive reported by -Wstringop-overflow
   2    { dg-do compile }
   3    { dg-options "-O2 -Wstringop-overflow" }  */
   4
   5 typedef __SIZE_TYPE__ size_t;
   6
   7 char buf[100];
   8
   9 void get_data (char*);
  10
  11 __attribute__ ((nonnull(1, 2)))
  12 inline char* my_strcpy (char* dst, const char* src, size_t size)
  13 {
  14   size_t len = __builtin_strlen (src);
  15   if (len < size)
  16     __builtin_memcpy (dst, src, len + 1);
  17   else
  18     {
  19       __builtin_memcpy (dst, src, size - 1); /* { dg-bogus "\\\[-Wstringop-oveflow]" } */
  20       dst[size - 1] = '\0';
  21     }
  22
  23   return dst;
  24 }
  25
  26 void test(void)
  27 {
  28   char data[20] = "12345";
  29
  30   get_data (data);
  31
  32   my_strcpy (buf, data, sizeof buf);
  33 }