1  #ifndef os
       2  # define os(ptr) __builtin_object_size (ptr, 0)
       3  #endif
       4  
       5  /* This is one of the alternatives for object size checking.
       6     If dst has side-effects, size checking will never be done.  */
       7  #undef memcpy
       8  #define memcpy(dst, src, len) \
       9    __builtin___memcpy_chk (dst, src, len, os (dst))
      10  #undef mempcpy
      11  #define mempcpy(dst, src, len) \
      12    __builtin___mempcpy_chk (dst, src, len, os (dst))
      13  #undef memmove
      14  #define memmove(dst, src, len) \
      15    __builtin___memmove_chk (dst, src, len, os (dst))
      16  #undef memset
      17  #define memset(dst, val, len) \
      18    __builtin___memset_chk (dst, val, len, os (dst))
      19  #undef strcpy
      20  #define strcpy(dst, src) \
      21    __builtin___strcpy_chk (dst, src, os (dst))
      22  #undef stpcpy
      23  #define stpcpy(dst, src) \
      24    __builtin___stpcpy_chk (dst, src, os (dst))
      25  #undef strcat
      26  #define strcat(dst, src) \
      27    __builtin___strcat_chk (dst, src, os (dst))
      28  #undef strncpy
      29  #define strncpy(dst, src, len) \
      30    __builtin___strncpy_chk (dst, src, len, os (dst))
      31  #undef stpncpy
      32  #define stpncpy(dst, src, len) \
      33    __builtin___stpncpy_chk (dst, src, len, os (dst))
      34  #undef strncat
      35  #define strncat(dst, src, len) \
      36    __builtin___strncat_chk (dst, src, len, os (dst))
      37  #undef sprintf
      38  #define sprintf(dst, ...) \
      39    __builtin___sprintf_chk (dst, 0, os (dst), __VA_ARGS__)
      40  #undef vsprintf
      41  #define vsprintf(dst, fmt, ap) \
      42    __builtin___vsprintf_chk (dst, 0, os (dst), fmt, ap)
      43  #undef snprintf
      44  #define snprintf(dst, len, ...) \
      45    __builtin___snprintf_chk (dst, len, 0, os (dst), __VA_ARGS__)
      46  #undef vsnprintf
      47  #define vsnprintf(dst, len, fmt, ap) \
      48    __builtin___vsnprintf_chk (dst, len, 0, os (dst), fmt, ap)
      49  
      50  /* Now "redefine" even builtins for the purpose of testing.  */
      51  #undef __builtin_memcpy
      52  #define __builtin_memcpy(dst, src, len) memcpy (dst, src, len)
      53  #undef __builtin_mempcpy
      54  #define __builtin_mempcpy(dst, src, len) mempcpy (dst, src, len)
      55  #undef __builtin_memmove
      56  #define __builtin_memmove(dst, src, len) memmove (dst, src, len)
      57  #undef __builtin_memset
      58  #define __builtin_memset(dst, val, len) memset (dst, val, len)
      59  #undef __builtin_strcpy
      60  #define __builtin_strcpy(dst, src) strcpy (dst, src)
      61  #undef __builtin_stpcpy
      62  #define __builtin_stpcpy(dst, src) stpcpy (dst, src)
      63  #undef __builtin_strcat
      64  #define __builtin_strcat(dst, src) strcat (dst, src)
      65  #undef __builtin_strncpy
      66  #define __builtin_strncpy(dst, src, len) strncpy (dst, src, len)
      67  #undef __builtin_strncat
      68  #define __builtin_strncat(dst, src, len) strncat (dst, src, len)
      69  #undef __builtin_sprintf
      70  #define __builtin_sprintf(dst, ...) sprintf (dst, __VA_ARGS__)
      71  #undef __builtin_vsprintf
      72  #define __builtin_vsprintf(dst, fmt, ap) vsprintf (dst, fmt, ap)
      73  #undef __builtin_snprintf
      74  #define __builtin_snprintf(dst, len, ...) snprintf (dst, len, __VA_ARGS__)
      75  #undef __builtin_vsnprintf
      76  #define __builtin_vsnprintf(dst, len, fmt, ap) vsnprintf (dst, len, fmt, ap)
      77  
      78  extern void *chk_fail_buf[];
      79  extern volatile int chk_fail_allowed, chk_calls;
      80  extern volatile int memcpy_disallowed, mempcpy_disallowed, memmove_disallowed;
      81  extern volatile int memset_disallowed, strcpy_disallowed, stpcpy_disallowed;
      82  extern volatile int strncpy_disallowed, stpncpy_disallowed, strcat_disallowed;
      83  extern volatile int strncat_disallowed, sprintf_disallowed, vsprintf_disallowed;
      84  extern volatile int snprintf_disallowed, vsnprintf_disallowed;
      85  
      86  /* A storage class that ensures that declarations bind locally.  We want
      87     to test non-static declarations where we know it is safe to do so.  */
      88  #if __PIC__ && !__PIE__
      89  #define LOCAL static
      90  #else
      91  #define LOCAL
      92  #endif