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d0fa09a770
Compilers may not be able to apply asm redirections to functions after these functions are used for the first time, e.g. clang 13. Fix [BZ #27087] by applying all long double-related asm redirections before using functions in bits/stdio.h. However, as these asm redirections depend on the declarations provided by libio/bits/stdio2.h, this header was split in 2: - libio/bits/stdio2-decl.h contains all function declarations; - libio/bits/stdio2.h remains with the remaining contents, including redirections. This also adds the access attribute to __vsnprintf_chk that was missing. Tested with build-many-glibcs.py. Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>
318 lines
9.8 KiB
C
318 lines
9.8 KiB
C
/* Checking macros for stdio functions.
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Copyright (C) 2004-2022 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 !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 int
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__NTH (vsprintf (char *__restrict __s, const char *__restrict __fmt,
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__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 !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 int
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__NTH (vsnprintf (char *__restrict __s, size_t __n,
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const char *__restrict __fmt, __gnuc_va_list __ap))
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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 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 !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 int
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vprintf (const char *__restrict __fmt, __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 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 !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 !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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extern char *__REDIRECT (__gets_warn, (char *__str), gets)
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__wur __warnattr ("please use fgets or getline instead, gets can't "
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"specify buffer size");
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__fortify_function __wur char *
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gets (char *__str)
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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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extern char *__REDIRECT (__fgets_alias,
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(char *__restrict __s, int __n,
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FILE *__restrict __stream), fgets)
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__wur __attr_access ((__write_only__, 1, 2));
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extern char *__REDIRECT (__fgets_chk_warn,
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(char *__restrict __s, size_t __size, int __n,
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FILE *__restrict __stream), __fgets_chk)
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__wur __warnattr ("fgets called with bigger size than length "
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"of destination buffer");
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__fortify_function __wur __fortified_attr_access (__write_only__, 1, 2) char *
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fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
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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 (__glibc_unsafe_len (__n, sizeof (char), sz))
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return __fgets_chk_warn (__s, sz, __n, __stream);
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return __fgets_chk (__s, sz, __n, __stream);
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}
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extern size_t __REDIRECT (__fread_alias,
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(void *__restrict __ptr, size_t __size,
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size_t __n, FILE *__restrict __stream),
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fread) __wur;
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extern size_t __REDIRECT (__fread_chk_warn,
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(void *__restrict __ptr, size_t __ptrlen,
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size_t __size, size_t __n,
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FILE *__restrict __stream),
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__fread_chk)
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__wur __warnattr ("fread called with bigger size * nmemb than length "
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"of destination buffer");
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__fortify_function __wur size_t
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fread (void *__restrict __ptr, size_t __size, size_t __n,
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FILE *__restrict __stream)
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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 (__glibc_unsafe_len (__n, __size, sz))
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return __fread_chk_warn (__ptr, sz, __size, __n, __stream);
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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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extern char *__REDIRECT (__fgets_unlocked_alias,
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(char *__restrict __s, int __n,
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FILE *__restrict __stream), fgets_unlocked)
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__wur __attr_access ((__write_only__, 1, 2));
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extern char *__REDIRECT (__fgets_unlocked_chk_warn,
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(char *__restrict __s, size_t __size, int __n,
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FILE *__restrict __stream), __fgets_unlocked_chk)
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__wur __warnattr ("fgets_unlocked called with bigger size than length "
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"of destination buffer");
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__fortify_function __wur __fortified_attr_access (__write_only__, 1, 2) char *
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fgets_unlocked (char *__restrict __s, int __n, FILE *__restrict __stream)
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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 (__glibc_unsafe_len (__n, sizeof (char), sz))
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return __fgets_unlocked_chk_warn (__s, sz, __n, __stream);
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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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extern size_t __REDIRECT (__fread_unlocked_alias,
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(void *__restrict __ptr, size_t __size,
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size_t __n, FILE *__restrict __stream),
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fread_unlocked) __wur;
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extern size_t __REDIRECT (__fread_unlocked_chk_warn,
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(void *__restrict __ptr, size_t __ptrlen,
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size_t __size, size_t __n,
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FILE *__restrict __stream),
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__fread_unlocked_chk)
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__wur __warnattr ("fread_unlocked called with bigger size * nmemb than "
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"length of destination buffer");
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__fortify_function __wur size_t
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fread_unlocked (void *__restrict __ptr, size_t __size, size_t __n,
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FILE *__restrict __stream)
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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 (__glibc_unsafe_len (__n, __size, sz))
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return __fread_unlocked_chk_warn (__ptr, sz, __size, __n, __stream);
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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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