Viewing file:  chk.h (3.4 KB) -rw-r--r--
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#ifndef os
# define os(ptr) __builtin_object_size (ptr, 0)
#endif
/* This is one of the alternatives for object size checking.
If dst has side-effects, size checking will never be done. */
#undef memcpy
#define memcpy(dst, src, len) \
__builtin___memcpy_chk (dst, src, len, os (dst))
#undef mempcpy
#define mempcpy(dst, src, len) \
__builtin___mempcpy_chk (dst, src, len, os (dst))
#undef memmove
#define memmove(dst, src, len) \
__builtin___memmove_chk (dst, src, len, os (dst))
#undef memset
#define memset(dst, val, len) \
__builtin___memset_chk (dst, val, len, os (dst))
#undef strcpy
#define strcpy(dst, src) \
__builtin___strcpy_chk (dst, src, os (dst))
#undef stpcpy
#define stpcpy(dst, src) \
__builtin___stpcpy_chk (dst, src, os (dst))
#undef strcat
#define strcat(dst, src) \
__builtin___strcat_chk (dst, src, os (dst))
#undef strncpy
#define strncpy(dst, src, len) \
__builtin___strncpy_chk (dst, src, len, os (dst))
#undef stpncpy
#define stpncpy(dst, src, len) \
__builtin___stpncpy_chk (dst, src, len, os (dst))
#undef strncat
#define strncat(dst, src, len) \
__builtin___strncat_chk (dst, src, len, os (dst))
#undef sprintf
#define sprintf(dst, ...) \
__builtin___sprintf_chk (dst, 0, os (dst), __VA_ARGS__)
#undef vsprintf
#define vsprintf(dst, fmt, ap) \
__builtin___vsprintf_chk (dst, 0, os (dst), fmt, ap)
#undef snprintf
#define snprintf(dst, len, ...) \
__builtin___snprintf_chk (dst, len, 0, os (dst), __VA_ARGS__)
#undef vsnprintf
#define vsnprintf(dst, len, fmt, ap) \
__builtin___vsnprintf_chk (dst, len, 0, os (dst), fmt, ap)
/* Now "redefine" even builtins for the purpose of testing. */
#undef __builtin_memcpy
#define __builtin_memcpy(dst, src, len) memcpy (dst, src, len)
#undef __builtin_mempcpy
#define __builtin_mempcpy(dst, src, len) mempcpy (dst, src, len)
#undef __builtin_memmove
#define __builtin_memmove(dst, src, len) memmove (dst, src, len)
#undef __builtin_memset
#define __builtin_memset(dst, val, len) memset (dst, val, len)
#undef __builtin_strcpy
#define __builtin_strcpy(dst, src) strcpy (dst, src)
#undef __builtin_stpcpy
#define __builtin_stpcpy(dst, src) stpcpy (dst, src)
#undef __builtin_strcat
#define __builtin_strcat(dst, src) strcat (dst, src)
#undef __builtin_strncpy
#define __builtin_strncpy(dst, src, len) strncpy (dst, src, len)
#undef __builtin_strncat
#define __builtin_strncat(dst, src, len) strncat (dst, src, len)
#undef __builtin_sprintf
#define __builtin_sprintf(dst, ...) sprintf (dst, __VA_ARGS__)
#undef __builtin_vsprintf
#define __builtin_vsprintf(dst, fmt, ap) vsprintf (dst, fmt, ap)
#undef __builtin_snprintf
#define __builtin_snprintf(dst, len, ...) snprintf (dst, len, __VA_ARGS__)
#undef __builtin_vsnprintf
#define __builtin_vsnprintf(dst, len, fmt, ap) vsnprintf (dst, len, fmt, ap)
extern void *chk_fail_buf[];
extern volatile int chk_fail_allowed, chk_calls;
extern volatile int memcpy_disallowed, mempcpy_disallowed, memmove_disallowed;
extern volatile int memset_disallowed, strcpy_disallowed, stpcpy_disallowed;
extern volatile int strncpy_disallowed, stpncpy_disallowed, strcat_disallowed;
extern volatile int strncat_disallowed, sprintf_disallowed, vsprintf_disallowed;
extern volatile int snprintf_disallowed, vsnprintf_disallowed;
/* A storage class that ensures that declarations bind locally. We want
to test non-static declarations where we know it is safe to do so. */
#if __PIC__ && !__PIE__
#define LOCAL static
#else
#define LOCAL
#endif
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