https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104042
Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2022-01-15
CC| |dmalcolm at gcc dot gnu.org,
| |iains at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
The reason for the failure is that the darwin headers, in <secure/_string.h>
(included from <string.h>), defines memcpy like this:
#if __has_builtin(__builtin___memcpy_chk) || defined(__GNUC__)
#undef memcpy
/* void *memcpy(void *dst, const void *src, size_t n) */
#define memcpy(dest, ...) \
__builtin___memcpy_chk (dest, __VA_ARGS__, __darwin_obsz0
(dest))
#endif
where __darwin_obsz0 is defined thusly:
#define __darwin_obsz0(object) __builtin_object_size (object, 0)
So either the testcase should be modified to use __builtin_memcpy, or the
analyzer should handle __builtin___memcpy_chk and emit the right warning.
