115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
#ifndef _FORTIFY_STDIO_H
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#define _FORTIFY_STDIO_H
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#include_next <stdio.h>
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#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0
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#ifndef __cplusplus
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#undef fgets
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#undef fread
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#undef fwrite
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#undef vsnprintf
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#undef vsnprintf
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#undef snprintf
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#undef sprintf
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extern char *__fgets_orig(char *, int, FILE *)
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__asm__(__USER_LABEL_PREFIX__ "fgets");
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extern __inline __attribute__((__always_inline__,__gnu_inline__))
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char *fgets(char *s, int n, FILE *fp)
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{
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size_t bos = __builtin_object_size(s, 0);
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if ((size_t)n > bos)
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__builtin_trap();
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return __fgets_orig(s, n, fp);
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}
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extern size_t __fread_orig(void *, size_t, size_t, FILE *)
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__asm__(__USER_LABEL_PREFIX__ "fread");
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extern __inline __attribute__((__always_inline__,__gnu_inline__))
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size_t fread(void *dst, size_t n, size_t nmemb, FILE *fp)
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{
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size_t bos = __builtin_object_size(dst, 0);
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if (n != 0 && (n * nmemb) / n != nmemb)
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__builtin_trap();
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if (n * nmemb > bos)
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__builtin_trap();
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return __fread_orig(dst, n, nmemb, fp);
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}
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extern size_t __fwrite_orig(const void *, size_t, size_t, FILE *)
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__asm__(__USER_LABEL_PREFIX__ "fwrite");
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extern __inline __attribute__((__always_inline__,__gnu_inline__))
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size_t fwrite(const void *dst, size_t n, size_t nmemb, FILE *fp)
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{
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size_t bos = __builtin_object_size(dst, 0);
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if (n != 0 && (n * nmemb) / n != nmemb)
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__builtin_trap();
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if (n * nmemb > bos)
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__builtin_trap();
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return __fwrite_orig(dst, n, nmemb, fp);
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}
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extern int __vsprintf_orig(char *, const char *, __builtin_va_list)
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__asm__(__USER_LABEL_PREFIX__ "vsprintf");
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extern __inline __attribute__((__always_inline__,__gnu_inline__))
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int vsprintf(char *s, const char *fmt, __builtin_va_list ap)
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{
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size_t bos = __builtin_object_size(s, 0);
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int r;
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if (bos != (size_t)-1) {
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r = __vsnprintf_orig(s, bos, fmt, ap);
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if (r != -1 && (size_t)r >= bos)
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__builtin_trap();
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} else {
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r = __vsprintf_orig(s, fmt, ap);
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}
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return r;
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}
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extern int __vsnprintf_orig(char *, size_t, const char *, __builtin_va_list)
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__asm__(__USER_LABEL_PREFIX__ "vsnprintf");
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extern __inline __attribute__((__always_inline__,__gnu_inline__))
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int vsnprintf(char *s, size_t n, const char *fmt, __builtin_va_list ap)
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{
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size_t bos = __builtin_object_size(s, 0);
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if (n > bos)
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__builtin_trap();
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return __vsnprintf_orig(s, n, fmt, ap);
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}
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#undef snprintf
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#define snprintf(s, n, fmt, ...) ({ \
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size_t _n = n; \
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size_t bos = __builtin_object_size(s, 0); \
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if (_n > bos) \
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__builtin_trap(); \
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(snprintf)(s, _n, fmt, ## __VA_ARGS__); \
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})
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#undef sprintf
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#define sprintf(s, fmt, ...) ({ \
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size_t bos = __builtin_object_size(s, 0); \
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int r; \
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if (bos != (size_t)-1) { \
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r = (snprintf)(s, bos, fmt, ## __VA_ARGS__); \
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if (r != -1 && (size_t)r >= bos) \
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__builtin_trap(); \
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} else { \
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r = (sprintf)(s, fmt, ## __VA_ARGS__); \
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} \
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r; \
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})
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#endif
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#endif
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#endif
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