#ifndef FORTIFY_STRING_H_ #define FORTIFY_STRING_H_ #include_next #if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0 #ifdef __cplusplus extern "C" { #endif static inline __attribute__ ((always_inline)) void * __fortify_memcpy(void *dest, const void *src, size_t n) { size_t bos = __builtin_object_size(dest, 0); char *d = (char *)dest; const char *s = (const char *)src; /* trap if pointers are overlapping but not if dest == src. * gcc seems to like to generate code that relies on dest == src */ if ((d < s && d + n > s) || (s < d && s + n > d)) __builtin_trap(); if (n > bos) __builtin_trap(); return memcpy(dest, src, n); } static inline __attribute__ ((always_inline)) void * __fortify_memmove(void *dest, const void *src, size_t n) { size_t bos = __builtin_object_size(dest, 0); if (n > bos) __builtin_trap(); return memmove(dest, src, n); } static inline __attribute__ ((always_inline)) void * __fortify_memset(void *dest, int c, size_t n) { size_t bos = __builtin_object_size(dest, 0); if (n > bos) __builtin_trap(); return memset(dest, c, n); } static inline __attribute__ ((always_inline)) char * __fortify_stpcpy(char *dest, const char *src) { size_t bos = __builtin_object_size(dest, 0); if (strlen(src) + 1 > bos) __builtin_trap(); return stpcpy(dest, src); } static inline __attribute__ ((always_inline)) char * __fortify_stpncpy(char *dest, const char *src, size_t n) { size_t bos = __builtin_object_size(dest, 0); if (n > bos) __builtin_trap(); return stpncpy(dest, src, n); } static inline __attribute__ ((always_inline)) char * __fortify_strcat(char *dest, const char *src) { size_t bos = __builtin_object_size(dest, 0); if (strlen(src) + strlen(dest) + 1 > bos) __builtin_trap(); return strcat(dest, src); } static inline __attribute__ ((always_inline)) char * __fortify_strcpy(char *dest, const char *src) { size_t bos = __builtin_object_size(dest, 0); if (strlen(src) + 1 > bos) __builtin_trap(); return strcpy(dest, src); } static inline __attribute__ ((always_inline)) char * __fortify_strncat(char *dest, const char *src, size_t n) { size_t bos = __builtin_object_size(dest, 0); size_t slen, dlen; if (n > bos) { slen = strlen(src); dlen = strlen(dest); if (slen > n) slen = n; if (slen + dlen + 1 > bos) __builtin_trap(); } return strncat(dest, src, n); } static inline __attribute__ ((always_inline)) char * __fortify_strncpy(char *dest, const char *src, size_t n) { size_t bos = __builtin_object_size(dest, 0); if (n > bos) __builtin_trap(); return strncpy(dest, src, n); } #ifdef _GNU_SOURCE static inline __attribute__ ((always_inline)) void * __fortify_mempcpy(void *dest, const void *src, size_t n) { size_t bos = __builtin_object_size(dest, 0); if (n > bos) __builtin_trap(); return mempcpy(dest, src, n); } #endif #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) static inline __attribute__ ((always_inline)) size_t __fortify_strlcat(char *dest, const char *src, size_t n) { size_t bos = __builtin_object_size(dest, 0); if (n > bos) __builtin_trap(); return strlcat(dest, src, n); } static inline __attribute__ ((always_inline)) size_t __fortify_strlcpy(char *dest, const char *src, size_t n) { size_t bos = __builtin_object_size(dest, 0); if (n > bos) __builtin_trap(); return strlcpy(dest, src, n); } #endif #undef memcpy #define memcpy(dest, src, n) __fortify_memcpy(dest, src, n) #undef memmove #define memmove(dest, src, n) __fortify_memmove(dest, src, n) #undef memset #define memset(dest, src, n) __fortify_memset(dest, src, n) #undef stpcpy #define stpcpy(dest, src) __fortify_stpcpy(dest, src) #undef stpncpy #define stpncpy(dest, src, n) __fortify_stpncpy(dest, src, n) #undef strcat #define strcat(dest, src) __fortify_strcat(dest, src) #undef strcpy #define strcpy(dest, src) __fortify_strcpy(dest, src) #undef strncat #define strncat(dest, src, n) __fortify_strncat(dest, src, n) #undef strncpy #define strncpy(dest, src, n) __fortify_strncpy(dest, src, n) #ifdef _GNU_SOURCE #undef mempcpy #define mempcpy(dest, src, n) __fortify_mempcpy(dest, src, n) #endif #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) #undef strlcat #define strlcat(dest, src, n) __fortify_strlcat(dest, src, n) #undef strlcpy #define strlcpy(dest, src, n) __fortify_strlcpy(dest, src, n) #endif #ifdef __cplusplus } #endif #endif #endif