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improve out-of-bounds checking with GCC 10 attribute access [BZ #25219]

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Adds the access attribute newly introduced in GCC 10 to the subset of
function declarations that are already covered by _FORTIFY_SOURCE and
that don't have corresponding GCC built-in equivalents.

Reviewed-by: DJ Delorie <dj@redhat.com>
This commit is contained in:
Martin Sebor
2020-05-04 11:21:50 -06:00
parent 38c6788818
commit 06febd8c67
9 changed files with 146 additions and 82 deletions
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17
stdlib/bits/stdlib.h
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@ -50,10 +50,11 @@ __NTH (realpath (const char *__restrict __name, char *__restrict __resolved))
extern int __ptsname_r_chk (int __fd, char *__buf, size_t __buflen,
size_t __nreal) __THROW __nonnull ((2));
size_t __nreal) __THROW __nonnull ((2))
__attr_access ((__write_only__, 2, 3));
extern int __REDIRECT_NTH (__ptsname_r_alias, (int __fd, char *__buf,
size_t __buflen), ptsname_r)
__nonnull ((2));
__nonnull ((2)) __attr_access ((__write_only__, 2, 3));
extern int __REDIRECT_NTH (__ptsname_r_chk_warn,
(int __fd, char *__buf, size_t __buflen,
size_t __nreal), __ptsname_r_chk)
@ -97,11 +98,13 @@ __NTH (wctomb (char *__s, wchar_t __wchar))
extern size_t __mbstowcs_chk (wchar_t *__restrict __dst,
const char *__restrict __src,
size_t __len, size_t __dstlen) __THROW;
size_t __len, size_t __dstlen) __THROW
__attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
extern size_t __REDIRECT_NTH (__mbstowcs_alias,
(wchar_t *__restrict __dst,
const char *__restrict __src,
size_t __len), mbstowcs);
size_t __len), mbstowcs)
__attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
extern size_t __REDIRECT_NTH (__mbstowcs_chk_warn,
(wchar_t *__restrict __dst,
const char *__restrict __src,
@ -129,11 +132,13 @@ __NTH (mbstowcs (wchar_t *__restrict __dst, const char *__restrict __src,
extern size_t __wcstombs_chk (char *__restrict __dst,
const wchar_t *__restrict __src,
size_t __len, size_t __dstlen) __THROW;
size_t __len, size_t __dstlen) __THROW
__attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
extern size_t __REDIRECT_NTH (__wcstombs_alias,
(char *__restrict __dst,
const wchar_t *__restrict __src,
size_t __len), wcstombs);
size_t __len), wcstombs)
__attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
extern size_t __REDIRECT_NTH (__wcstombs_chk_warn,
(char *__restrict __dst,
const wchar_t *__restrict __src,