gcc/testsuite/c-c++-common/analyzer/realloc-pr110014.c

   1 void *realloc (void *, unsigned long)
   2   __attribute__((__nothrow__, __leaf__))
   3   __attribute__((__warn_unused_result__)) __attribute__((__alloc_size__ (2)));
   4
   5 long *
   6 slurp (long *buffer, unsigned long file_size)
   7 {
   8   unsigned long cc;
   9   if (!__builtin_add_overflow (file_size - file_size % sizeof (long),
  10                                2 * sizeof (long), &cc))
  11     buffer = (long *) realloc (buffer, cc);
  12   return buffer;
  13 }
  14
  15 long *
  16 slurp1 (long *buffer, unsigned long file_size)
  17 {
  18   return (long *) realloc (buffer, file_size - file_size % sizeof (long));
  19 }
  20
  21 long *
  22 slurp2 (long *buffer, unsigned long file_size)
  23 {
  24   return (long *) realloc (buffer, (file_size / sizeof (long)) * sizeof (long));
  25 }