diff options
Diffstat (limited to 'stdlib')
| -rw-r--r-- | stdlib/bits/stdlib.h | 65 |
1 files changed, 53 insertions, 12 deletions
diff --git a/stdlib/bits/stdlib.h b/stdlib/bits/stdlib.h index 7ee7bf5587..f6af5e518c 100644 --- a/stdlib/bits/stdlib.h +++ b/stdlib/bits/stdlib.h @@ -27,12 +27,24 @@ extern char *__realpath_chk (__const char *__restrict __name, extern char *__REDIRECT_NTH (__realpath_alias, (__const char *__restrict __name, char *__restrict __resolved), realpath) __wur; +extern char *__REDIRECT_NTH (__realpath_chk_warn, + (__const char *__restrict __name, + char *__restrict __resolved, + size_t __resolvedlen), __realpath_chk) __wur + __warnattr ("second argument of realpath must be either NULL or at " + "least PATH_MAX bytes long buffer"); __extern_always_inline __wur char * __NTH (realpath (__const char *__restrict __name, char *__restrict __resolved)) { if (__bos (__resolved) != (size_t) -1) - return __realpath_chk (__name, __resolved, __bos (__resolved)); + { +#if defined _LIBC_LIMITS_H_ && defined PATH_MAX + if (__bos (__resolved) < PATH_MAX) + return __realpath_chk_warn (__name, __resolved, __bos (__resolved)); +#endif + return __realpath_chk (__name, __resolved, __bos (__resolved)); + } return __realpath_alias (__name, __resolved); } @@ -43,13 +55,22 @@ extern int __ptsname_r_chk (int __fd, char *__buf, size_t __buflen, extern int __REDIRECT_NTH (__ptsname_r_alias, (int __fd, char *__buf, size_t __buflen), ptsname_r) __nonnull ((2)); +extern int __REDIRECT_NTH (__ptsname_r_chk_warn, + (int __fd, char *__buf, size_t __buflen, + size_t __nreal), __ptsname_r_chk) + __nonnull ((2)) __warnattr ("ptsname_r called with buflen bigger than " + "size of buf"); __extern_always_inline int __NTH (ptsname_r (int __fd, char *__buf, size_t __buflen)) { - if (__bos (__buf) != (size_t) -1 - && (!__builtin_constant_p (__buflen) || __buflen > __bos (__buf))) - return __ptsname_r_chk (__fd, __buf, __buflen, __bos (__buf)); + if (__bos (__buf) != (size_t) -1) + { + if (!__builtin_constant_p (__buflen)) + return __ptsname_r_chk (__fd, __buf, __buflen, __bos (__buf)); + if (__buflen > __bos (__buf)) + return __ptsname_r_chk_warn (__fd, __buf, __buflen, __bos (__buf)); + } return __ptsname_r_alias (__fd, __buf, __buflen); } @@ -82,16 +103,27 @@ extern size_t __REDIRECT_NTH (__mbstowcs_alias, (wchar_t *__restrict __dst, __const char *__restrict __src, size_t __len), mbstowcs); +extern size_t __REDIRECT_NTH (__mbstowcs_chk_warn, + (wchar_t *__restrict __dst, + __const char *__restrict __src, + size_t __len, size_t __dstlen), __mbstowcs_chk) + __warnattr ("mbstowcs called with dst buffer smaller than len " + "* sizeof (wchar_t)"); __extern_always_inline size_t __NTH (mbstowcs (wchar_t *__restrict __dst, __const char *__restrict __src, size_t __len)) { - if (__bos (__dst) != (size_t) -1 - && (!__builtin_constant_p (__len) - || __len > __bos (__dst) / sizeof (wchar_t))) - return __mbstowcs_chk (__dst, __src, __len, - __bos (__dst) / sizeof (wchar_t)); + if (__bos (__dst) != (size_t) -1) + { + if (!__builtin_constant_p (__len)) + return __mbstowcs_chk (__dst, __src, __len, + __bos (__dst) / sizeof (wchar_t)); + + if (__len > __bos (__dst) / sizeof (wchar_t)) + return __mbstowcs_chk_warn (__dst, __src, __len, + __bos (__dst) / sizeof (wchar_t)); + } return __mbstowcs_alias (__dst, __src, __len); } @@ -103,13 +135,22 @@ extern size_t __REDIRECT_NTH (__wcstombs_alias, (char *__restrict __dst, __const wchar_t *__restrict __src, size_t __len), wcstombs); +extern size_t __REDIRECT_NTH (__wcstombs_chk_warn, + (char *__restrict __dst, + __const wchar_t *__restrict __src, + size_t __len, size_t __dstlen), __wcstombs_chk) + __warnattr ("wcstombs called with dst buffer smaller than len"); __extern_always_inline size_t __NTH (wcstombs (char *__restrict __dst, __const wchar_t *__restrict __src, size_t __len)) { - if (__bos (__dst) != (size_t) -1 - && (!__builtin_constant_p (__len) || __len > __bos (__dst))) - return __wcstombs_chk (__dst, __src, __len, __bos (__dst)); + if (__bos (__dst) != (size_t) -1) + { + if (!__builtin_constant_p (__len)) + return __wcstombs_chk (__dst, __src, __len, __bos (__dst)); + if (__len > __bos (__dst)) + return __wcstombs_chk_warn (__dst, __src, __len, __bos (__dst)); + } return __wcstombs_alias (__dst, __src, __len); } |