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syslog: Improve fortify with clang
It improve fortify checks for syslog and vsyslog. The compile and runtime hecks have similar coverage as with GCC. The syslog fortify wrapper calls the va_arg version, since clang does not support __va_arg_pack. Checked on aarch64, armhf, x86_64, and i686. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
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@ -36,6 +36,15 @@ syslog (int __pri, const char *__fmt, ...)
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{
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__syslog_chk (__pri, __USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ());
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}
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#elif __fortify_use_clang && defined __USE_MISC
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__fortify_function_error_function __attribute_overloadable__ void
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syslog (int __pri, __fortify_clang_overload_arg (const char *, , __fmt), ...)
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{
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__gnuc_va_list __fortify_ap;
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__builtin_va_start (__fortify_ap, __fmt);
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__vsyslog_chk (__pri, __USE_FORTIFY_LEVEL - 1, __fmt, __fortify_ap);
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__builtin_va_end (__fortify_ap);
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}
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#elif !defined __cplusplus
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# define syslog(pri, ...) \
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__syslog_chk (pri, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
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@ -43,8 +52,9 @@ syslog (int __pri, const char *__fmt, ...)
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#ifdef __USE_MISC
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__fortify_function void
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vsyslog (int __pri, const char *__fmt, __gnuc_va_list __ap)
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__fortify_function __attribute_overloadable__ void
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vsyslog (int __pri, __fortify_clang_overload_arg (const char *, ,__fmt),
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__gnuc_va_list __ap)
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{
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__vsyslog_chk (__pri, __USE_FORTIFY_LEVEL - 1, __fmt, __ap);
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}
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