mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 09:43:32 +08:00
39ca997ab3
Rename the identifier sz to __sz everywhere.
Fixes: a643f60c53 ("Make sure that the fortified function conditionals are constant")
405 lines
13 KiB
C
405 lines
13 KiB
C
/* Checking macros for stdio functions.
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Copyright (C) 2004-2024 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 _BITS_STDIO2_H
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#define _BITS_STDIO2_H 1
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#ifndef _STDIO_H
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# error "Never include <bits/stdio2.h> directly; use <stdio.h> instead."
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#endif
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#ifdef __va_arg_pack
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__fortify_function int
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__NTH (sprintf (char *__restrict __s, const char *__restrict __fmt, ...))
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{
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return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
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__glibc_objsize (__s), __fmt,
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__va_arg_pack ());
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}
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#elif __fortify_use_clang
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/* clang does not have __va_arg_pack, so defer to va_arg version. */
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__fortify_function_error_function __attribute_overloadable__ int
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__NTH (sprintf (__fortify_clang_overload_arg (char *, __restrict, __s),
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const char *__restrict __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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int __r = __builtin___vsprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
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__glibc_objsize (__s), __fmt,
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__fortify_ap);
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__builtin_va_end (__fortify_ap);
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return __r;
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}
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#elif !defined __cplusplus
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# define sprintf(str, ...) \
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__builtin___sprintf_chk (str, __USE_FORTIFY_LEVEL - 1, \
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__glibc_objsize (str), __VA_ARGS__)
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#endif
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__fortify_function __attribute_overloadable__ int
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__NTH (vsprintf (__fortify_clang_overload_arg (char *, __restrict, __s),
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const char *__restrict __fmt, __gnuc_va_list __ap))
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{
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return __builtin___vsprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
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__glibc_objsize (__s), __fmt, __ap);
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}
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#if defined __USE_ISOC99 || defined __USE_UNIX98
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# ifdef __va_arg_pack
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__fortify_function int
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__NTH (snprintf (char *__restrict __s, size_t __n,
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const char *__restrict __fmt, ...))
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{
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return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
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__glibc_objsize (__s), __fmt,
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__va_arg_pack ());
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}
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# elif __fortify_use_clang
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/* clang does not have __va_arg_pack, so defer to va_arg version. */
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__fortify_function_error_function __attribute_overloadable__ int
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__NTH (snprintf (__fortify_clang_overload_arg (char *, __restrict, __s),
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size_t __n, const char *__restrict __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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int __r = __builtin___vsnprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
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__glibc_objsize (__s), __fmt,
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__fortify_ap);
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__builtin_va_end (__fortify_ap);
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return __r;
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}
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# elif !defined __cplusplus
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# define snprintf(str, len, ...) \
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__builtin___snprintf_chk (str, len, __USE_FORTIFY_LEVEL - 1, \
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__glibc_objsize (str), __VA_ARGS__)
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# endif
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__fortify_function __attribute_overloadable__ int
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__NTH (vsnprintf (__fortify_clang_overload_arg (char *, __restrict, __s),
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size_t __n, const char *__restrict __fmt,
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__gnuc_va_list __ap))
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__fortify_clang_warning (__fortify_clang_bos_static_lt (__n, __s),
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"call to vsnprintf may overflow the destination "
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"buffer")
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{
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return __builtin___vsnprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
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__glibc_objsize (__s), __fmt, __ap);
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}
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#endif
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#if __USE_FORTIFY_LEVEL > 1
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# ifdef __va_arg_pack
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__fortify_function __nonnull ((1)) int
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fprintf (FILE *__restrict __stream, const char *__restrict __fmt, ...)
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{
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return __fprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt,
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__va_arg_pack ());
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}
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__fortify_function int
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printf (const char *__restrict __fmt, ...)
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{
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return __printf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ());
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}
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# elif __fortify_use_clang
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/* clang does not have __va_arg_pack, so defer to va_arg version. */
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__fortify_function_error_function __attribute_overloadable__ __nonnull ((1)) int
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fprintf (__fortify_clang_overload_arg (FILE *, __restrict, __stream),
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const char *__restrict __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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int __r = __builtin___vfprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1,
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__fmt, __fortify_ap);
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__builtin_va_end (__fortify_ap);
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return __r;
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}
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__fortify_function_error_function __attribute_overloadable__ int
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printf (__fortify_clang_overload_arg (const char *, __restrict, __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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int __r = __builtin___vprintf_chk (__USE_FORTIFY_LEVEL - 1, __fmt,
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__fortify_ap);
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__builtin_va_end (__fortify_ap);
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return __r;
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}
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# elif !defined __cplusplus
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# define printf(...) \
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__printf_chk (__USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
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# define fprintf(stream, ...) \
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__fprintf_chk (stream, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
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# endif
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__fortify_function __attribute_overloadable__ int
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vprintf (__fortify_clang_overload_arg (const char *, __restrict, __fmt),
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__gnuc_va_list __ap)
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{
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#ifdef __USE_EXTERN_INLINES
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return __vfprintf_chk (stdout, __USE_FORTIFY_LEVEL - 1, __fmt, __ap);
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#else
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return __vprintf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __ap);
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#endif
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}
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__fortify_function __nonnull ((1)) int
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vfprintf (FILE *__restrict __stream,
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const char *__restrict __fmt, __gnuc_va_list __ap)
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{
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return __vfprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt, __ap);
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}
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# ifdef __USE_XOPEN2K8
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# ifdef __va_arg_pack
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__fortify_function int
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dprintf (int __fd, const char *__restrict __fmt, ...)
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{
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return __dprintf_chk (__fd, __USE_FORTIFY_LEVEL - 1, __fmt,
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__va_arg_pack ());
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}
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# elif __fortify_use_clang
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__fortify_function_error_function __attribute_overloadable__ int
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dprintf (int __fd, __fortify_clang_overload_arg (const char *, __restrict,
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__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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int __r = __vdprintf_chk (__fd, __USE_FORTIFY_LEVEL - 1, __fmt,
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__fortify_ap);
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__builtin_va_end (__fortify_ap);
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return __r;
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}
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# elif !defined __cplusplus
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# define dprintf(fd, ...) \
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__dprintf_chk (fd, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
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# endif
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__fortify_function int
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vdprintf (int __fd, const char *__restrict __fmt, __gnuc_va_list __ap)
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{
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return __vdprintf_chk (__fd, __USE_FORTIFY_LEVEL - 1, __fmt, __ap);
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}
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# endif
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# ifdef __USE_GNU
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# ifdef __va_arg_pack
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__fortify_function int
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__NTH (asprintf (char **__restrict __ptr, const char *__restrict __fmt, ...))
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{
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return __asprintf_chk (__ptr, __USE_FORTIFY_LEVEL - 1, __fmt,
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__va_arg_pack ());
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}
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__fortify_function int
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__NTH (__asprintf (char **__restrict __ptr, const char *__restrict __fmt,
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...))
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{
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return __asprintf_chk (__ptr, __USE_FORTIFY_LEVEL - 1, __fmt,
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__va_arg_pack ());
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}
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__fortify_function int
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__NTH (obstack_printf (struct obstack *__restrict __obstack,
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const char *__restrict __fmt, ...))
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{
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return __obstack_printf_chk (__obstack, __USE_FORTIFY_LEVEL - 1, __fmt,
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__va_arg_pack ());
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}
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# elif __fortify_use_clang
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__fortify_function_error_function __attribute_overloadable__ int
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__NTH (asprintf (__fortify_clang_overload_arg (char **, __restrict, __ptr),
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const char *__restrict __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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int __r = __vasprintf_chk (__ptr, __USE_FORTIFY_LEVEL - 1, __fmt,
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__fortify_ap);
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__builtin_va_end (__fortify_ap);
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return __r;
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}
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__fortify_function_error_function __attribute_overloadable__ int
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__NTH (__asprintf (__fortify_clang_overload_arg (char **, __restrict, __ptr),
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const char *__restrict __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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int __r = __vasprintf_chk (__ptr, __USE_FORTIFY_LEVEL - 1, __fmt,
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__fortify_ap);
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__builtin_va_end (__fortify_ap);
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return __r;
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}
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__fortify_function_error_function __attribute_overloadable__ int
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__NTH (obstack_printf (__fortify_clang_overload_arg (struct obstack *,
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__restrict, __obstack),
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const char *__restrict __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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int __r = __obstack_vprintf_chk (__obstack, __USE_FORTIFY_LEVEL - 1,
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__fmt, __fortify_ap);
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__builtin_va_end (__fortify_ap);
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return __r;
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}
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# elif !defined __cplusplus
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# define asprintf(ptr, ...) \
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__asprintf_chk (ptr, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
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# define __asprintf(ptr, ...) \
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__asprintf_chk (ptr, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
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# define obstack_printf(obstack, ...) \
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__obstack_printf_chk (obstack, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
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# endif
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__fortify_function int
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__NTH (vasprintf (char **__restrict __ptr, const char *__restrict __fmt,
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__gnuc_va_list __ap))
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{
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return __vasprintf_chk (__ptr, __USE_FORTIFY_LEVEL - 1, __fmt, __ap);
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}
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__fortify_function int
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__NTH (obstack_vprintf (struct obstack *__restrict __obstack,
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const char *__restrict __fmt, __gnuc_va_list __ap))
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{
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return __obstack_vprintf_chk (__obstack, __USE_FORTIFY_LEVEL - 1, __fmt,
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__ap);
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}
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# endif
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#endif
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#if __GLIBC_USE (DEPRECATED_GETS)
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__fortify_function __wur __attribute_overloadable__ char *
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gets (__fortify_clang_overload_arg (char *, , __str))
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__fortify_clang_warning (__glibc_objsize (__str) == (size_t) -1,
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"please use fgets or getline instead, gets "
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"can not specify buffer size")
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{
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if (__glibc_objsize (__str) != (size_t) -1)
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return __gets_chk (__str, __glibc_objsize (__str));
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return __gets_warn (__str);
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}
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#endif
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__fortify_function __wur __fortified_attr_access (__write_only__, 1, 2)
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__nonnull ((3)) __attribute_overloadable__ char *
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fgets (__fortify_clang_overload_arg (char *, __restrict, __s), int __n,
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FILE *__restrict __stream)
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__fortify_clang_warning (__fortify_clang_bos_static_lt (__n, __s) && __n > 0,
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"fgets called with bigger size than length of "
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"destination buffer")
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{
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size_t __sz = __glibc_objsize (__s);
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if (__glibc_safe_or_unknown_len (__n, sizeof (char), __sz))
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return __fgets_alias (__s, __n, __stream);
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#if !__fortify_use_clang
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if (__glibc_unsafe_len (__n, sizeof (char), __sz))
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return __fgets_chk_warn (__s, __sz, __n, __stream);
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#endif
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return __fgets_chk (__s, __sz, __n, __stream);
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}
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__fortify_function __wur __nonnull ((4)) __attribute_overloadable__ size_t
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fread (__fortify_clang_overload_arg (void *, __restrict, __ptr),
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size_t __size, size_t __n, FILE *__restrict __stream)
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__fortify_clang_warning (__fortify_clang_bos0_static_lt (__size * __n, __ptr)
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&& !__fortify_clang_mul_may_overflow (__size, __n),
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"fread called with bigger size * n than length "
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"of destination buffer")
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{
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size_t __sz = __glibc_objsize0 (__ptr);
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if (__glibc_safe_or_unknown_len (__n, __size, __sz))
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return __fread_alias (__ptr, __size, __n, __stream);
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#if !__fortify_use_clang
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if (__glibc_unsafe_len (__n, __size, __sz))
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return __fread_chk_warn (__ptr, __sz, __size, __n, __stream);
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#endif
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return __fread_chk (__ptr, __sz, __size, __n, __stream);
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}
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#ifdef __USE_GNU
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__fortify_function __wur __fortified_attr_access (__write_only__, 1, 2)
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__nonnull ((3)) __attribute_overloadable__ char *
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fgets_unlocked (__fortify_clang_overload_arg (char *, __restrict, __s),
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int __n, FILE *__restrict __stream)
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__fortify_clang_warning (__fortify_clang_bos_static_lt (__n, __s) && __n > 0,
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"fgets called with bigger size than length of "
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"destination buffer")
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{
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size_t __sz = __glibc_objsize (__s);
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if (__glibc_safe_or_unknown_len (__n, sizeof (char), __sz))
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return __fgets_unlocked_alias (__s, __n, __stream);
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#if !__fortify_use_clang
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if (__glibc_unsafe_len (__n, sizeof (char), __sz))
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return __fgets_unlocked_chk_warn (__s, __sz, __n, __stream);
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#endif
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return __fgets_unlocked_chk (__s, __sz, __n, __stream);
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}
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#endif
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#ifdef __USE_MISC
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# undef fread_unlocked
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__fortify_function __wur __nonnull ((4)) __attribute_overloadable__ size_t
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fread_unlocked (__fortify_clang_overload_arg0 (void *, __restrict, __ptr),
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size_t __size, size_t __n, FILE *__restrict __stream)
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__fortify_clang_warning (__fortify_clang_bos0_static_lt (__size * __n, __ptr)
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&& !__fortify_clang_mul_may_overflow (__size, __n),
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"fread_unlocked called with bigger size * n than "
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"length of destination buffer")
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{
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size_t __sz = __glibc_objsize0 (__ptr);
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if (__glibc_safe_or_unknown_len (__n, __size, __sz))
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{
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# ifdef __USE_EXTERN_INLINES
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if (__builtin_constant_p (__size)
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&& __builtin_constant_p (__n)
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&& (__size | __n) < (((size_t) 1) << (8 * sizeof (size_t) / 2))
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&& __size * __n <= 8)
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{
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size_t __cnt = __size * __n;
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char *__cptr = (char *) __ptr;
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if (__cnt == 0)
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return 0;
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for (; __cnt > 0; --__cnt)
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{
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int __c = getc_unlocked (__stream);
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if (__c == EOF)
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break;
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*__cptr++ = __c;
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}
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return (__cptr - (char *) __ptr) / __size;
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}
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# endif
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return __fread_unlocked_alias (__ptr, __size, __n, __stream);
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}
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# if !__fortify_use_clang
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if (__glibc_unsafe_len (__n, __size, __sz))
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return __fread_unlocked_chk_warn (__ptr, __sz, __size, __n, __stream);
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# endif
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return __fread_unlocked_chk (__ptr, __sz, __size, __n, __stream);
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}
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#endif
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#endif /* bits/stdio2.h. */
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