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glibc/wcsmbs/bits/wchar2.h
Siddhesh Poyarekar fcfc908681 debug: Synchronize feature guards in fortified functions [BZ #28746] 
Some functions (e.g. stpcpy, pread64, etc.) had moved to POSIX in the
main headers as they got incorporated into the standard, but their
fortified variants remained under __USE_GNU.  As a result, these
functions did not get fortified when _GNU_SOURCE was not defined.

Add test wrappers that check all functions tested in tst-chk0 at all
levels with _GNU_SOURCE undefined and then use the failures to (1)
exclude checks for _GNU_SOURCE functions in these tests and (2) Fix
feature macro guards in the fortified function headers so that they're
the same as the ones in the main headers.

This fixes BZ #28746.

Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-01-12 23:34:48 +05:30

515 lines
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/* Checking macros for wchar functions.
Copyright (C) 2005-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _WCHAR_H
# error "Never include <bits/wchar2.h> directly; use <wchar.h> instead."
#endif
extern wchar_t *__wmemcpy_chk (wchar_t *__restrict __s1,
const wchar_t *__restrict __s2, size_t __n,
size_t __ns1) __THROW;
extern wchar_t *__REDIRECT_NTH (__wmemcpy_alias,
(wchar_t *__restrict __s1,
const wchar_t *__restrict __s2, size_t __n),
wmemcpy);
extern wchar_t *__REDIRECT_NTH (__wmemcpy_chk_warn,
(wchar_t *__restrict __s1,
const wchar_t *__restrict __s2, size_t __n,
size_t __ns1), __wmemcpy_chk)
__warnattr ("wmemcpy called with length bigger than size of destination "
"buffer");
__fortify_function wchar_t *
__NTH (wmemcpy (wchar_t *__restrict __s1, const wchar_t *__restrict __s2,
size_t __n))
{
return __glibc_fortify_n (wmemcpy, __n, sizeof (wchar_t),
__glibc_objsize0 (__s1),
__s1, __s2, __n);
}
extern wchar_t *__wmemmove_chk (wchar_t *__s1, const wchar_t *__s2,
size_t __n, size_t __ns1) __THROW;
extern wchar_t *__REDIRECT_NTH (__wmemmove_alias, (wchar_t *__s1,
const wchar_t *__s2,
size_t __n), wmemmove);
extern wchar_t *__REDIRECT_NTH (__wmemmove_chk_warn,
(wchar_t *__s1, const wchar_t *__s2,
size_t __n, size_t __ns1), __wmemmove_chk)
__warnattr ("wmemmove called with length bigger than size of destination "
"buffer");
__fortify_function wchar_t *
__NTH (wmemmove (wchar_t *__s1, const wchar_t *__s2, size_t __n))
{
return __glibc_fortify_n (wmemmove, __n, sizeof (wchar_t),
__glibc_objsize0 (__s1),
__s1, __s2, __n);
}
#ifdef __USE_GNU
extern wchar_t *__wmempcpy_chk (wchar_t *__restrict __s1,
const wchar_t *__restrict __s2, size_t __n,
size_t __ns1) __THROW;
extern wchar_t *__REDIRECT_NTH (__wmempcpy_alias,
(wchar_t *__restrict __s1,
const wchar_t *__restrict __s2,
size_t __n), wmempcpy);
extern wchar_t *__REDIRECT_NTH (__wmempcpy_chk_warn,
(wchar_t *__restrict __s1,
const wchar_t *__restrict __s2, size_t __n,
size_t __ns1), __wmempcpy_chk)
__warnattr ("wmempcpy called with length bigger than size of destination "
"buffer");
__fortify_function wchar_t *
__NTH (wmempcpy (wchar_t *__restrict __s1, const wchar_t *__restrict __s2,
size_t __n))
{
return __glibc_fortify_n (wmempcpy, __n, sizeof (wchar_t),
__glibc_objsize0 (__s1),
__s1, __s2, __n);
}
#endif
extern wchar_t *__wmemset_chk (wchar_t *__s, wchar_t __c, size_t __n,
size_t __ns) __THROW;
extern wchar_t *__REDIRECT_NTH (__wmemset_alias, (wchar_t *__s, wchar_t __c,
size_t __n), wmemset);
extern wchar_t *__REDIRECT_NTH (__wmemset_chk_warn,
(wchar_t *__s, wchar_t __c, size_t __n,
size_t __ns), __wmemset_chk)
__warnattr ("wmemset called with length bigger than size of destination "
"buffer");
__fortify_function wchar_t *
__NTH (wmemset (wchar_t *__s, wchar_t __c, size_t __n))
{
return __glibc_fortify_n (wmemset, __n, sizeof (wchar_t),
__glibc_objsize0 (__s),
__s, __c, __n);
}
extern wchar_t *__wcscpy_chk (wchar_t *__restrict __dest,
const wchar_t *__restrict __src,
size_t __n) __THROW;
extern wchar_t *__REDIRECT_NTH (__wcscpy_alias,
(wchar_t *__restrict __dest,
const wchar_t *__restrict __src), wcscpy);
__fortify_function wchar_t *
__NTH (wcscpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
{
size_t sz = __glibc_objsize (__dest);
if (sz != (size_t) -1)
return __wcscpy_chk (__dest, __src, sz / sizeof (wchar_t));
return __wcscpy_alias (__dest, __src);
}
extern wchar_t *__wcpcpy_chk (wchar_t *__restrict __dest,
const wchar_t *__restrict __src,
size_t __destlen) __THROW;
extern wchar_t *__REDIRECT_NTH (__wcpcpy_alias,
(wchar_t *__restrict __dest,
const wchar_t *__restrict __src), wcpcpy);
__fortify_function wchar_t *
__NTH (wcpcpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
{
size_t sz = __glibc_objsize (__dest);
if (sz != (size_t) -1)
return __wcpcpy_chk (__dest, __src, sz / sizeof (wchar_t));
return __wcpcpy_alias (__dest, __src);
}
extern wchar_t *__wcsncpy_chk (wchar_t *__restrict __dest,
const wchar_t *__restrict __src, size_t __n,
size_t __destlen) __THROW;
extern wchar_t *__REDIRECT_NTH (__wcsncpy_alias,
(wchar_t *__restrict __dest,
const wchar_t *__restrict __src,
size_t __n), wcsncpy);
extern wchar_t *__REDIRECT_NTH (__wcsncpy_chk_warn,
(wchar_t *__restrict __dest,
const wchar_t *__restrict __src,
size_t __n, size_t __destlen), __wcsncpy_chk)
__warnattr ("wcsncpy called with length bigger than size of destination "
"buffer");
__fortify_function wchar_t *
__NTH (wcsncpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
size_t __n))
{
return __glibc_fortify_n (wcsncpy, __n, sizeof (wchar_t),
__glibc_objsize (__dest),
__dest, __src, __n);
}
extern wchar_t *__wcpncpy_chk (wchar_t *__restrict __dest,
const wchar_t *__restrict __src, size_t __n,
size_t __destlen) __THROW;
extern wchar_t *__REDIRECT_NTH (__wcpncpy_alias,
(wchar_t *__restrict __dest,
const wchar_t *__restrict __src,
size_t __n), wcpncpy);
extern wchar_t *__REDIRECT_NTH (__wcpncpy_chk_warn,
(wchar_t *__restrict __dest,
const wchar_t *__restrict __src,
size_t __n, size_t __destlen), __wcpncpy_chk)
__warnattr ("wcpncpy called with length bigger than size of destination "
"buffer");
__fortify_function wchar_t *
__NTH (wcpncpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
size_t __n))
{
return __glibc_fortify_n (wcpncpy, __n, sizeof (wchar_t),
__glibc_objsize (__dest),
__dest, __src, __n);
}
extern wchar_t *__wcscat_chk (wchar_t *__restrict __dest,
const wchar_t *__restrict __src,
size_t __destlen) __THROW;
extern wchar_t *__REDIRECT_NTH (__wcscat_alias,
(wchar_t *__restrict __dest,
const wchar_t *__restrict __src), wcscat);
__fortify_function wchar_t *
__NTH (wcscat (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
{
size_t sz = __glibc_objsize (__dest);
if (sz != (size_t) -1)
return __wcscat_chk (__dest, __src, sz / sizeof (wchar_t));
return __wcscat_alias (__dest, __src);
}
extern wchar_t *__wcsncat_chk (wchar_t *__restrict __dest,
const wchar_t *__restrict __src,
size_t __n, size_t __destlen) __THROW;
extern wchar_t *__REDIRECT_NTH (__wcsncat_alias,
(wchar_t *__restrict __dest,
const wchar_t *__restrict __src,
size_t __n), wcsncat);
__fortify_function wchar_t *
__NTH (wcsncat (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
size_t __n))
{
size_t sz = __glibc_objsize (__dest);
if (sz != (size_t) -1)
return __wcsncat_chk (__dest, __src, __n, sz / sizeof (wchar_t));
return __wcsncat_alias (__dest, __src, __n);
}
extern int __swprintf_chk (wchar_t *__restrict __s, size_t __n,
int __flag, size_t __s_len,
const wchar_t *__restrict __format, ...)
__THROW /* __attribute__ ((__format__ (__wprintf__, 5, 6))) */;
extern int __REDIRECT_NTH_LDBL (__swprintf_alias,
(wchar_t *__restrict __s, size_t __n,
const wchar_t *__restrict __fmt, ...),
swprintf);
#ifdef __va_arg_pack
__fortify_function int
__NTH (swprintf (wchar_t *__restrict __s, size_t __n,
const wchar_t *__restrict __fmt, ...))
{
size_t sz = __glibc_objsize (__s);
if (sz != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
return __swprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
sz / sizeof (wchar_t), __fmt, __va_arg_pack ());
return __swprintf_alias (__s, __n, __fmt, __va_arg_pack ());
}
#elif !defined __cplusplus
/* XXX We might want to have support in gcc for swprintf. */
# define swprintf(s, n, ...) \
(__glibc_objsize (s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1 \
? __swprintf_chk (s, n, __USE_FORTIFY_LEVEL - 1, \
__glibc_objsize (s) / sizeof (wchar_t), __VA_ARGS__) \
: swprintf (s, n, __VA_ARGS__))
#endif
extern int __vswprintf_chk (wchar_t *__restrict __s, size_t __n,
int __flag, size_t __s_len,
const wchar_t *__restrict __format,
__gnuc_va_list __arg)
__THROW /* __attribute__ ((__format__ (__wprintf__, 5, 0))) */;
extern int __REDIRECT_NTH_LDBL (__vswprintf_alias,
(wchar_t *__restrict __s, size_t __n,
const wchar_t *__restrict __fmt,
__gnuc_va_list __ap), vswprintf);
__fortify_function int
__NTH (vswprintf (wchar_t *__restrict __s, size_t __n,
const wchar_t *__restrict __fmt, __gnuc_va_list __ap))
{
size_t sz = __glibc_objsize (__s);
if (sz != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
return __vswprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
sz / sizeof (wchar_t), __fmt, __ap);
return __vswprintf_alias (__s, __n, __fmt, __ap);
}
#if __USE_FORTIFY_LEVEL > 1
extern int __fwprintf_chk (__FILE *__restrict __stream, int __flag,
const wchar_t *__restrict __format, ...);
extern int __wprintf_chk (int __flag, const wchar_t *__restrict __format,
...);
extern int __vfwprintf_chk (__FILE *__restrict __stream, int __flag,
const wchar_t *__restrict __format,
__gnuc_va_list __ap);
extern int __vwprintf_chk (int __flag, const wchar_t *__restrict __format,
__gnuc_va_list __ap);
# ifdef __va_arg_pack
__fortify_function int
wprintf (const wchar_t *__restrict __fmt, ...)
{
return __wprintf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ());
}
__fortify_function int
fwprintf (__FILE *__restrict __stream, const wchar_t *__restrict __fmt, ...)
{
return __fwprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt,
__va_arg_pack ());
}
# elif !defined __cplusplus
# define wprintf(...) \
__wprintf_chk (__USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
# define fwprintf(stream, ...) \
__fwprintf_chk (stream, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
# endif
__fortify_function int
vwprintf (const wchar_t *__restrict __fmt, __gnuc_va_list __ap)
{
return __vwprintf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __ap);
}
__fortify_function int
vfwprintf (__FILE *__restrict __stream,
const wchar_t *__restrict __fmt, __gnuc_va_list __ap)
{
return __vfwprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt, __ap);
}
#endif
extern wchar_t *__fgetws_chk (wchar_t *__restrict __s, size_t __size, int __n,
__FILE *__restrict __stream) __wur;
extern wchar_t *__REDIRECT (__fgetws_alias,
(wchar_t *__restrict __s, int __n,
__FILE *__restrict __stream), fgetws) __wur;
extern wchar_t *__REDIRECT (__fgetws_chk_warn,
(wchar_t *__restrict __s, size_t __size, int __n,
__FILE *__restrict __stream), __fgetws_chk)
__wur __warnattr ("fgetws called with bigger size than length "
"of destination buffer");
__fortify_function __wur wchar_t *
fgetws (wchar_t *__restrict __s, int __n, __FILE *__restrict __stream)
{
size_t sz = __glibc_objsize (__s);
if (__glibc_safe_or_unknown_len (__n, sizeof (wchar_t), sz))
return __fgetws_alias (__s, __n, __stream);
if (__glibc_unsafe_len (__n, sizeof (wchar_t), sz))
return __fgetws_chk_warn (__s, sz / sizeof (wchar_t), __n, __stream);
return __fgetws_chk (__s, sz / sizeof (wchar_t), __n, __stream);
}
#ifdef __USE_GNU
extern wchar_t *__fgetws_unlocked_chk (wchar_t *__restrict __s, size_t __size,
int __n, __FILE *__restrict __stream)
__wur;
extern wchar_t *__REDIRECT (__fgetws_unlocked_alias,
(wchar_t *__restrict __s, int __n,
__FILE *__restrict __stream), fgetws_unlocked)
__wur;
extern wchar_t *__REDIRECT (__fgetws_unlocked_chk_warn,
(wchar_t *__restrict __s, size_t __size, int __n,
__FILE *__restrict __stream),
__fgetws_unlocked_chk)
__wur __warnattr ("fgetws_unlocked called with bigger size than length "
"of destination buffer");
__fortify_function __wur wchar_t *
fgetws_unlocked (wchar_t *__restrict __s, int __n, __FILE *__restrict __stream)
{
size_t sz = __glibc_objsize (__s);
if (__glibc_safe_or_unknown_len (__n, sizeof (wchar_t), sz))
return __fgetws_unlocked_alias (__s, __n, __stream);
if (__glibc_unsafe_len (__n, sizeof (wchar_t), sz))
return __fgetws_unlocked_chk_warn (__s, sz / sizeof (wchar_t), __n,
__stream);
return __fgetws_unlocked_chk (__s, sz / sizeof (wchar_t), __n, __stream);
}
#endif
extern size_t __wcrtomb_chk (char *__restrict __s, wchar_t __wchar,
mbstate_t *__restrict __p,
size_t __buflen) __THROW __wur;
extern size_t __REDIRECT_NTH (__wcrtomb_alias,
(char *__restrict __s, wchar_t __wchar,
mbstate_t *__restrict __ps), wcrtomb) __wur;
__fortify_function __wur size_t
__NTH (wcrtomb (char *__restrict __s, wchar_t __wchar,
mbstate_t *__restrict __ps))
{
/* We would have to include <limits.h> to get a definition of MB_LEN_MAX.
But this would only disturb the namespace. So we define our own
version here. */
#define __WCHAR_MB_LEN_MAX 16
#if defined MB_LEN_MAX && MB_LEN_MAX != __WCHAR_MB_LEN_MAX
# error "Assumed value of MB_LEN_MAX wrong"
#endif
if (__glibc_objsize (__s) != (size_t) -1
&& __WCHAR_MB_LEN_MAX > __glibc_objsize (__s))
return __wcrtomb_chk (__s, __wchar, __ps, __glibc_objsize (__s));
return __wcrtomb_alias (__s, __wchar, __ps);
}
extern size_t __mbsrtowcs_chk (wchar_t *__restrict __dst,
const char **__restrict __src,
size_t __len, mbstate_t *__restrict __ps,
size_t __dstlen) __THROW;
extern size_t __REDIRECT_NTH (__mbsrtowcs_alias,
(wchar_t *__restrict __dst,
const char **__restrict __src,
size_t __len, mbstate_t *__restrict __ps),
mbsrtowcs);
extern size_t __REDIRECT_NTH (__mbsrtowcs_chk_warn,
(wchar_t *__restrict __dst,
const char **__restrict __src,
size_t __len, mbstate_t *__restrict __ps,
size_t __dstlen), __mbsrtowcs_chk)
__warnattr ("mbsrtowcs called with dst buffer smaller than len "
"* sizeof (wchar_t)");
__fortify_function size_t
__NTH (mbsrtowcs (wchar_t *__restrict __dst, const char **__restrict __src,
size_t __len, mbstate_t *__restrict __ps))
{
return __glibc_fortify_n (mbsrtowcs, __len, sizeof (wchar_t),
__glibc_objsize (__dst),
__dst, __src, __len, __ps);
}
extern size_t __wcsrtombs_chk (char *__restrict __dst,
const wchar_t **__restrict __src,
size_t __len, mbstate_t *__restrict __ps,
size_t __dstlen) __THROW;
extern size_t __REDIRECT_NTH (__wcsrtombs_alias,
(char *__restrict __dst,
const wchar_t **__restrict __src,
size_t __len, mbstate_t *__restrict __ps),
wcsrtombs);
extern size_t __REDIRECT_NTH (__wcsrtombs_chk_warn,
(char *__restrict __dst,
const wchar_t **__restrict __src,
size_t __len, mbstate_t *__restrict __ps,
size_t __dstlen), __wcsrtombs_chk)
__warnattr ("wcsrtombs called with dst buffer smaller than len");
__fortify_function size_t
__NTH (wcsrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
size_t __len, mbstate_t *__restrict __ps))
{
return __glibc_fortify (wcsrtombs, __len, sizeof (char),
__glibc_objsize (__dst),
__dst, __src, __len, __ps);
}
#ifdef __USE_XOPEN2K8
extern size_t __mbsnrtowcs_chk (wchar_t *__restrict __dst,
const char **__restrict __src, size_t __nmc,
size_t __len, mbstate_t *__restrict __ps,
size_t __dstlen) __THROW;
extern size_t __REDIRECT_NTH (__mbsnrtowcs_alias,
(wchar_t *__restrict __dst,
const char **__restrict __src, size_t __nmc,
size_t __len, mbstate_t *__restrict __ps),
mbsnrtowcs);
extern size_t __REDIRECT_NTH (__mbsnrtowcs_chk_warn,
(wchar_t *__restrict __dst,
const char **__restrict __src, size_t __nmc,
size_t __len, mbstate_t *__restrict __ps,
size_t __dstlen), __mbsnrtowcs_chk)
__warnattr ("mbsnrtowcs called with dst buffer smaller than len "
"* sizeof (wchar_t)");
__fortify_function size_t
__NTH (mbsnrtowcs (wchar_t *__restrict __dst, const char **__restrict __src,
size_t __nmc, size_t __len, mbstate_t *__restrict __ps))
{
return __glibc_fortify_n (mbsnrtowcs, __len, sizeof (wchar_t),
__glibc_objsize (__dst),
__dst, __src, __nmc, __len, __ps);
}
extern size_t __wcsnrtombs_chk (char *__restrict __dst,
const wchar_t **__restrict __src,
size_t __nwc, size_t __len,
mbstate_t *__restrict __ps, size_t __dstlen)
__THROW;
extern size_t __REDIRECT_NTH (__wcsnrtombs_alias,
(char *__restrict __dst,
const wchar_t **__restrict __src,
size_t __nwc, size_t __len,
mbstate_t *__restrict __ps), wcsnrtombs);
extern size_t __REDIRECT_NTH (__wcsnrtombs_chk_warn,
(char *__restrict __dst,
const wchar_t **__restrict __src,
size_t __nwc, size_t __len,
mbstate_t *__restrict __ps,
size_t __dstlen), __wcsnrtombs_chk)
__warnattr ("wcsnrtombs called with dst buffer smaller than len");
__fortify_function size_t
__NTH (wcsnrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
size_t __nwc, size_t __len, mbstate_t *__restrict __ps))
{
return __glibc_fortify (wcsnrtombs, __len, sizeof (char),
__glibc_objsize (__dst),
__dst, __src, __nwc, __len, __ps);
}
#endif
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