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471c3c7a47
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>
62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
/* Checking macros for syslog functions.
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Copyright (C) 2005-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _SYS_SYSLOG_H
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# error "Never include <bits/syslog.h> directly; use <sys/syslog.h> instead."
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#endif
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#include <bits/syslog-decl.h>
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#include <bits/floatn.h>
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#if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
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# include <bits/syslog-ldbl.h>
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#endif
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/* The following functions must be used only after applying all asm
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redirections, e.g. long double asm redirections. */
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#ifdef __va_arg_pack
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__fortify_function void
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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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#endif
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#ifdef __USE_MISC
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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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#endif
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