5960e3364f
We need to use a variadic macro in this case because GCC doesn't allow inline functions with variable argument lists.
35 lines
817 B
C
35 lines
817 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 (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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#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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#endif
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#endif
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