29 lines
706 B
C
29 lines
706 B
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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static inline
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__attribute__ ((always_inline))
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__attribute__ ((__format__ (printf, 3, 0)))
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__attribute__ ((__nonnull__ (3)))
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int __fortify_vsnprintf(char *__restrict s, size_t n, const char *__restrict 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 (bos == (size_t)-1)
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return vsnprintf(s, n, fmt, ap);
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if (__builtin_constant_p(n) && n > bos)
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__builtin_trap();
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return vsnprintf(s, n, fmt, ap);
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}
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#undef vsnprintf
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#define vsnprintf(s, n, fmt, ap) __fortify_vsnprintf(s, n, fmt, ap)
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#endif
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#endif
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