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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>arm/morello/v1
Tulio Magno Quites Machado Filho
4 years ago
5 changed files with 125 additions and 68 deletions
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#include <libio/bits/stdio2-decl.h> |
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/* Checking macros for stdio functions. Declarations only.
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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_DEC_H |
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#define _BITS_STDIO2_DEC_H 1 |
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#ifndef _STDIO_H |
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# error "Never include <bits/stdio2-decl.h> directly; use <stdio.h> instead." |
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#endif |
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extern int __sprintf_chk (char *__restrict __s, int __flag, size_t __slen, |
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const char *__restrict __format, ...) __THROW |
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__attr_access ((__write_only__, 1, 3)); |
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extern int __vsprintf_chk (char *__restrict __s, int __flag, size_t __slen, |
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const char *__restrict __format, |
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__gnuc_va_list __ap) __THROW |
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__attr_access ((__write_only__, 1, 3)); |
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#if defined __USE_ISOC99 || defined __USE_UNIX98 |
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extern int __snprintf_chk (char *__restrict __s, size_t __n, int __flag, |
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size_t __slen, const char *__restrict __format, |
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...) __THROW |
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__attr_access ((__write_only__, 1, 2)); |
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extern int __vsnprintf_chk (char *__restrict __s, size_t __n, int __flag, |
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size_t __slen, const char *__restrict __format, |
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__gnuc_va_list __ap) __THROW |
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__attr_access ((__write_only__, 1, 2)); |
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#endif |
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#if __USE_FORTIFY_LEVEL > 1 |
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extern int __fprintf_chk (FILE *__restrict __stream, int __flag, |
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const char *__restrict __format, ...); |
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extern int __printf_chk (int __flag, const char *__restrict __format, ...); |
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extern int __vfprintf_chk (FILE *__restrict __stream, int __flag, |
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const char *__restrict __format, __gnuc_va_list __ap); |
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extern int __vprintf_chk (int __flag, const char *__restrict __format, |
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__gnuc_va_list __ap); |
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# ifdef __USE_XOPEN2K8 |
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extern int __dprintf_chk (int __fd, int __flag, const char *__restrict __fmt, |
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...) __attribute__ ((__format__ (__printf__, 3, 4))); |
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extern int __vdprintf_chk (int __fd, int __flag, |
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const char *__restrict __fmt, __gnuc_va_list __arg) |
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__attribute__ ((__format__ (__printf__, 3, 0))); |
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# endif |
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# ifdef __USE_GNU |
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extern int __asprintf_chk (char **__restrict __ptr, int __flag, |
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const char *__restrict __fmt, ...) |
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__THROW __attribute__ ((__format__ (__printf__, 3, 4))) __wur; |
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extern int __vasprintf_chk (char **__restrict __ptr, int __flag, |
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const char *__restrict __fmt, __gnuc_va_list __arg) |
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__THROW __attribute__ ((__format__ (__printf__, 3, 0))) __wur; |
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extern int __obstack_printf_chk (struct obstack *__restrict __obstack, |
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int __flag, const char *__restrict __format, |
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...) |
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__THROW __attribute__ ((__format__ (__printf__, 3, 4))); |
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extern int __obstack_vprintf_chk (struct obstack *__restrict __obstack, |
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int __flag, |
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const char *__restrict __format, |
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__gnuc_va_list __args) |
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__THROW __attribute__ ((__format__ (__printf__, 3, 0))); |
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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 *__gets_chk (char *__str, size_t) __wur; |
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#endif |
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extern char *__fgets_chk (char *__restrict __s, size_t __size, int __n, |
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FILE *__restrict __stream) |
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__wur __attr_access ((__write_only__, 1, 3)); |
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extern size_t __fread_chk (void *__restrict __ptr, size_t __ptrlen, |
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size_t __size, size_t __n, |
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FILE *__restrict __stream) __wur; |
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#ifdef __USE_GNU |
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extern char *__fgets_unlocked_chk (char *__restrict __s, size_t __size, |
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int __n, FILE *__restrict __stream) |
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__wur __attr_access ((__write_only__, 1, 3)); |
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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 __fread_unlocked_chk (void *__restrict __ptr, size_t __ptrlen, |
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size_t __size, size_t __n, |
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FILE *__restrict __stream) __wur; |
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#endif |
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#endif /* bits/stdio2-decl.h. */ |
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