[v7,4/4] nonstring: Enable __FORTIFY_LEVEL=3

Message ID 20201230064348.376092-5-siddhesh@sourceware.org
State Committed
Headers
Series _FORTIFY_SOURCE=3 |

Commit Message

Siddhesh Poyarekar Dec. 30, 2020, 6:43 a.m. UTC
  Use __builtin_dynamic_object_size in the remaining functions that
don't have compiler builtins as is the case for string functions.
---
 io/bits/poll2.h       |  18 +++---
 libio/bits/stdio.h    |   2 +-
 libio/bits/stdio2.h   |  62 ++++++++++--------
 posix/bits/unistd.h   | 120 ++++++++++++++++++----------------
 socket/bits/socket2.h |  22 ++++---
 stdlib/bits/stdlib.h  |  42 ++++++------
 wcsmbs/bits/wchar2.h  | 146 ++++++++++++++++++++++++------------------
 7 files changed, 229 insertions(+), 183 deletions(-)
  

Comments

Adhemerval Zanella Netto Dec. 31, 2020, 10:50 a.m. UTC | #1
On 30/12/2020 03:43, Siddhesh Poyarekar wrote:
> Use __builtin_dynamic_object_size in the remaining functions that
> don't have compiler builtins as is the case for string functions.

LGTM, thanks.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

> ---
>  io/bits/poll2.h       |  18 +++---
>  libio/bits/stdio.h    |   2 +-
>  libio/bits/stdio2.h   |  62 ++++++++++--------
>  posix/bits/unistd.h   | 120 ++++++++++++++++++----------------
>  socket/bits/socket2.h |  22 ++++---
>  stdlib/bits/stdlib.h  |  42 ++++++------
>  wcsmbs/bits/wchar2.h  | 146 ++++++++++++++++++++++++------------------
>  7 files changed, 229 insertions(+), 183 deletions(-)
> 
> diff --git a/io/bits/poll2.h b/io/bits/poll2.h
> index dca49717db..d204351bd0 100644
> --- a/io/bits/poll2.h
> +++ b/io/bits/poll2.h
> @@ -35,12 +35,13 @@ extern int __REDIRECT (__poll_chk_warn, (struct pollfd *__fds, nfds_t __nfds,
>  __fortify_function int
>  poll (struct pollfd *__fds, nfds_t __nfds, int __timeout)
>  {
> -  if (__bos (__fds) != (__SIZE_TYPE__) -1)
> +  if (__glibc_objsize (__fds) != (__SIZE_TYPE__) -1)
>      {
>        if (! __builtin_constant_p (__nfds))
> -	return __poll_chk (__fds, __nfds, __timeout, __bos (__fds));
> -      else if (__bos (__fds) / sizeof (*__fds) < __nfds)
> -	return __poll_chk_warn (__fds, __nfds, __timeout, __bos (__fds));
> +	return __poll_chk (__fds, __nfds, __timeout, __glibc_objsize (__fds));
> +      else if (__glibc_objsize (__fds) / sizeof (*__fds) < __nfds)
> +	return __poll_chk_warn (__fds, __nfds, __timeout,
> +				__glibc_objsize (__fds));
>      }
>  
>    return __poll_alias (__fds, __nfds, __timeout);
> @@ -65,13 +66,14 @@ __fortify_function int
>  ppoll (struct pollfd *__fds, nfds_t __nfds, const struct timespec *__timeout,
>         const __sigset_t *__ss)
>  {
> -  if (__bos (__fds) != (__SIZE_TYPE__) -1)
> +  if (__glibc_objsize (__fds) != (__SIZE_TYPE__) -1)
>      {
>        if (! __builtin_constant_p (__nfds))
> -	return __ppoll_chk (__fds, __nfds, __timeout, __ss, __bos (__fds));
> -      else if (__bos (__fds) / sizeof (*__fds) < __nfds)
> +	return __ppoll_chk (__fds, __nfds, __timeout, __ss,
> +			    __glibc_objsize (__fds));
> +      else if (__glibc_objsize (__fds) / sizeof (*__fds) < __nfds)
>  	return __ppoll_chk_warn (__fds, __nfds, __timeout, __ss,
> -				 __bos (__fds));
> +				 __glibc_objsize (__fds));
>      }
>  
>    return __ppoll_alias (__fds, __nfds, __timeout, __ss);
> diff --git a/libio/bits/stdio.h b/libio/bits/stdio.h
> index 6745571ed5..6d1f0f9fc9 100644
> --- a/libio/bits/stdio.h
> +++ b/libio/bits/stdio.h
> @@ -31,7 +31,7 @@
>  
>  
>  #ifdef __USE_EXTERN_INLINES
> -/* For -D_FORTIFY_SOURCE{,=2} bits/stdio2.h will define a different
> +/* For -D_FORTIFY_SOURCE{,=2,=3} bits/stdio2.h will define a different
>     inline.  */
>  # if !(__USE_FORTIFY_LEVEL > 0 && defined __fortify_function)
>  /* Write formatted output to stdout from argument list ARG.  */
> diff --git a/libio/bits/stdio2.h b/libio/bits/stdio2.h
> index ff9202c2cb..365c25b7b0 100644
> --- a/libio/bits/stdio2.h
> +++ b/libio/bits/stdio2.h
> @@ -36,12 +36,13 @@ __fortify_function int
>  __NTH (sprintf (char *__restrict __s, const char *__restrict __fmt, ...))
>  {
>    return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
> -				  __bos (__s), __fmt, __va_arg_pack ());
> +				  __glibc_objsize (__s), __fmt,
> +				  __va_arg_pack ());
>  }
>  #elif !defined __cplusplus
>  # define sprintf(str, ...) \
> -  __builtin___sprintf_chk (str, __USE_FORTIFY_LEVEL - 1, __bos (str), \
> -			   __VA_ARGS__)
> +  __builtin___sprintf_chk (str, __USE_FORTIFY_LEVEL - 1,		      \
> +			   __glibc_objsize (str), __VA_ARGS__)
>  #endif
>  
>  __fortify_function int
> @@ -49,7 +50,7 @@ __NTH (vsprintf (char *__restrict __s, const char *__restrict __fmt,
>  		 __gnuc_va_list __ap))
>  {
>    return __builtin___vsprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
> -				   __bos (__s), __fmt, __ap);
> +				   __glibc_objsize (__s), __fmt, __ap);
>  }
>  
>  #if defined __USE_ISOC99 || defined __USE_UNIX98
> @@ -68,12 +69,13 @@ __NTH (snprintf (char *__restrict __s, size_t __n,
>  		 const char *__restrict __fmt, ...))
>  {
>    return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
> -				   __bos (__s), __fmt, __va_arg_pack ());
> +				   __glibc_objsize (__s), __fmt,
> +				   __va_arg_pack ());
>  }
>  # elif !defined __cplusplus
>  #  define snprintf(str, len, ...) \
> -  __builtin___snprintf_chk (str, len, __USE_FORTIFY_LEVEL - 1, __bos (str), \
> -			    __VA_ARGS__)
> +  __builtin___snprintf_chk (str, len, __USE_FORTIFY_LEVEL - 1,		      \
> +			    __glibc_objsize (str), __VA_ARGS__)
>  # endif
>  
>  __fortify_function int
> @@ -81,7 +83,7 @@ __NTH (vsnprintf (char *__restrict __s, size_t __n,
>  		  const char *__restrict __fmt, __gnuc_va_list __ap))
>  {
>    return __builtin___vsnprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
> -				    __bos (__s), __fmt, __ap);
> +				    __glibc_objsize (__s), __fmt, __ap);
>  }
>  
>  #endif
> @@ -237,8 +239,8 @@ extern char *__REDIRECT (__gets_warn, (char *__str), gets)
>  __fortify_function __wur char *
>  gets (char *__str)
>  {
> -  if (__bos (__str) != (size_t) -1)
> -    return __gets_chk (__str, __bos (__str));
> +  if (__glibc_objsize (__str) != (size_t) -1)
> +    return __gets_chk (__str, __glibc_objsize (__str));
>    return __gets_warn (__str);
>  }
>  #endif
> @@ -259,13 +261,13 @@ extern char *__REDIRECT (__fgets_chk_warn,
>  __fortify_function __wur __attr_access ((__write_only__, 1, 2)) char *
>  fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
>  {
> -  if (__bos (__s) != (size_t) -1)
> +  if (__glibc_objsize (__s) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__n) || __n <= 0)
> -	return __fgets_chk (__s, __bos (__s), __n, __stream);
> +	return __fgets_chk (__s, __glibc_objsize (__s), __n, __stream);
>  
> -      if ((size_t) __n > __bos (__s))
> -	return __fgets_chk_warn (__s, __bos (__s), __n, __stream);
> +      if ((size_t) __n > __glibc_objsize (__s))
> +	return __fgets_chk_warn (__s, __glibc_objsize (__s), __n, __stream);
>      }
>    return __fgets_alias (__s, __n, __stream);
>  }
> @@ -289,15 +291,17 @@ __fortify_function __wur size_t
>  fread (void *__restrict __ptr, size_t __size, size_t __n,
>         FILE *__restrict __stream)
>  {
> -  if (__bos0 (__ptr) != (size_t) -1)
> +  if (__glibc_objsize0 (__ptr) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__size)
>  	  || !__builtin_constant_p (__n)
>  	  || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2)))
> -	return __fread_chk (__ptr, __bos0 (__ptr), __size, __n, __stream);
> +	return __fread_chk (__ptr, __glibc_objsize0 (__ptr), __size, __n,
> +			    __stream);
>  
> -      if (__size * __n > __bos0 (__ptr))
> -	return __fread_chk_warn (__ptr, __bos0 (__ptr), __size, __n, __stream);
> +      if (__size * __n > __glibc_objsize0 (__ptr))
> +	return __fread_chk_warn (__ptr, __glibc_objsize0 (__ptr), __size, __n,
> +				 __stream);
>      }
>    return __fread_alias (__ptr, __size, __n, __stream);
>  }
> @@ -319,13 +323,15 @@ extern char *__REDIRECT (__fgets_unlocked_chk_warn,
>  __fortify_function __wur __attr_access ((__write_only__, 1, 2)) char *
>  fgets_unlocked (char *__restrict __s, int __n, FILE *__restrict __stream)
>  {
> -  if (__bos (__s) != (size_t) -1)
> +  if (__glibc_objsize (__s) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__n) || __n <= 0)
> -	return __fgets_unlocked_chk (__s, __bos (__s), __n, __stream);
> +	return __fgets_unlocked_chk (__s, __glibc_objsize (__s), __n,
> +				     __stream);
>  
> -      if ((size_t) __n > __bos (__s))
> -	return __fgets_unlocked_chk_warn (__s, __bos (__s), __n, __stream);
> +      if ((size_t) __n > __glibc_objsize (__s))
> +	return __fgets_unlocked_chk_warn (__s, __glibc_objsize (__s), __n,
> +					  __stream);
>      }
>    return __fgets_unlocked_alias (__s, __n, __stream);
>  }
> @@ -352,17 +358,17 @@ __fortify_function __wur size_t
>  fread_unlocked (void *__restrict __ptr, size_t __size, size_t __n,
>  		FILE *__restrict __stream)
>  {
> -  if (__bos0 (__ptr) != (size_t) -1)
> +  if (__glibc_objsize0 (__ptr) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__size)
>  	  || !__builtin_constant_p (__n)
>  	  || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2)))
> -	return __fread_unlocked_chk (__ptr, __bos0 (__ptr), __size, __n,
> -				     __stream);
> +	return __fread_unlocked_chk (__ptr, __glibc_objsize0 (__ptr), __size,
> +				     __n, __stream);
>  
> -      if (__size * __n > __bos0 (__ptr))
> -	return __fread_unlocked_chk_warn (__ptr, __bos0 (__ptr), __size, __n,
> -					  __stream);
> +      if (__size * __n > __glibc_objsize0 (__ptr))
> +	return __fread_unlocked_chk_warn (__ptr, __glibc_objsize0 (__ptr),
> +					  __size, __n, __stream);
>      }
>  
>  # ifdef __USE_EXTERN_INLINES
> diff --git a/posix/bits/unistd.h b/posix/bits/unistd.h
> index 725a83eb0d..6c5ed0c618 100644
> --- a/posix/bits/unistd.h
> +++ b/posix/bits/unistd.h
> @@ -35,13 +35,14 @@ extern ssize_t __REDIRECT (__read_chk_warn,
>  __fortify_function __wur ssize_t
>  read (int __fd, void *__buf, size_t __nbytes)
>  {
> -  if (__bos0 (__buf) != (size_t) -1)
> +  if (__glibc_objsize0 (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__nbytes))
> -	return __read_chk (__fd, __buf, __nbytes, __bos0 (__buf));
> +	return __read_chk (__fd, __buf, __nbytes, __glibc_objsize0 (__buf));
>  
> -      if (__nbytes > __bos0 (__buf))
> -	return __read_chk_warn (__fd, __buf, __nbytes, __bos0 (__buf));
> +      if (__nbytes > __glibc_objsize0 (__buf))
> +	return __read_chk_warn (__fd, __buf, __nbytes,
> +				__glibc_objsize0 (__buf));
>      }
>    return __read_alias (__fd, __buf, __nbytes);
>  }
> @@ -77,14 +78,15 @@ extern ssize_t __REDIRECT (__pread64_chk_warn,
>  __fortify_function __wur ssize_t
>  pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)
>  {
> -  if (__bos0 (__buf) != (size_t) -1)
> +  if (__glibc_objsize0 (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__nbytes))
> -	return __pread_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf));
> +	return __pread_chk (__fd, __buf, __nbytes, __offset,
> +			    __glibc_objsize0 (__buf));
>  
> -      if ( __nbytes > __bos0 (__buf))
> +      if ( __nbytes > __glibc_objsize0 (__buf))
>  	return __pread_chk_warn (__fd, __buf, __nbytes, __offset,
> -				 __bos0 (__buf));
> +				 __glibc_objsize0 (__buf));
>      }
>    return __pread_alias (__fd, __buf, __nbytes, __offset);
>  }
> @@ -92,14 +94,15 @@ pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)
>  __fortify_function __wur ssize_t
>  pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
>  {
> -  if (__bos0 (__buf) != (size_t) -1)
> +  if (__glibc_objsize0 (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__nbytes))
> -	return __pread64_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf));
> +	return __pread64_chk (__fd, __buf, __nbytes, __offset,
> +			      __glibc_objsize0 (__buf));
>  
> -      if ( __nbytes > __bos0 (__buf))
> +      if ( __nbytes > __glibc_objsize0 (__buf))
>  	return __pread64_chk_warn (__fd, __buf, __nbytes, __offset,
> -				   __bos0 (__buf));
> +				   __glibc_objsize0 (__buf));
>      }
>  
>    return __pread64_alias (__fd, __buf, __nbytes, __offset);
> @@ -110,14 +113,15 @@ pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
>  __fortify_function __wur ssize_t
>  pread64 (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
>  {
> -  if (__bos0 (__buf) != (size_t) -1)
> +  if (__glibc_objsize0 (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__nbytes))
> -	return __pread64_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf));
> +	return __pread64_chk (__fd, __buf, __nbytes, __offset,
> +			      __glibc_objsize0 (__buf));
>  
> -      if ( __nbytes > __bos0 (__buf))
> +      if ( __nbytes > __glibc_objsize0 (__buf))
>  	return __pread64_chk_warn (__fd, __buf, __nbytes, __offset,
> -				   __bos0 (__buf));
> +				   __glibc_objsize0 (__buf));
>      }
>  
>    return __pread64_alias (__fd, __buf, __nbytes, __offset);
> @@ -145,13 +149,14 @@ __fortify_function __nonnull ((1, 2)) __wur ssize_t
>  __NTH (readlink (const char *__restrict __path, char *__restrict __buf,
>  		 size_t __len))
>  {
> -  if (__bos (__buf) != (size_t) -1)
> +  if (__glibc_objsize (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__len))
> -	return __readlink_chk (__path, __buf, __len, __bos (__buf));
> +	return __readlink_chk (__path, __buf, __len, __glibc_objsize (__buf));
>  
> -      if ( __len > __bos (__buf))
> -	return __readlink_chk_warn (__path, __buf, __len, __bos (__buf));
> +      if ( __len > __glibc_objsize (__buf))
> +	return __readlink_chk_warn (__path, __buf, __len,
> +				    __glibc_objsize (__buf));
>      }
>    return __readlink_alias (__path, __buf, __len);
>  }
> @@ -179,14 +184,15 @@ __fortify_function __nonnull ((2, 3)) __wur ssize_t
>  __NTH (readlinkat (int __fd, const char *__restrict __path,
>  		   char *__restrict __buf, size_t __len))
>  {
> -  if (__bos (__buf) != (size_t) -1)
> +  if (__glibc_objsize (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__len))
> -	return __readlinkat_chk (__fd, __path, __buf, __len, __bos (__buf));
> +	return __readlinkat_chk (__fd, __path, __buf, __len,
> +				 __glibc_objsize (__buf));
>  
> -      if (__len > __bos (__buf))
> +      if (__len > __glibc_objsize (__buf))
>  	return __readlinkat_chk_warn (__fd, __path, __buf, __len,
> -				      __bos (__buf));
> +				      __glibc_objsize (__buf));
>      }
>    return __readlinkat_alias (__fd, __path, __buf, __len);
>  }
> @@ -206,13 +212,13 @@ extern char *__REDIRECT_NTH (__getcwd_chk_warn,
>  __fortify_function __wur char *
>  __NTH (getcwd (char *__buf, size_t __size))
>  {
> -  if (__bos (__buf) != (size_t) -1)
> +  if (__glibc_objsize (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__size))
> -	return __getcwd_chk (__buf, __size, __bos (__buf));
> +	return __getcwd_chk (__buf, __size, __glibc_objsize (__buf));
>  
> -      if (__size > __bos (__buf))
> -	return __getcwd_chk_warn (__buf, __size, __bos (__buf));
> +      if (__size > __glibc_objsize (__buf))
> +	return __getcwd_chk_warn (__buf, __size, __glibc_objsize (__buf));
>      }
>    return __getcwd_alias (__buf, __size);
>  }
> @@ -227,8 +233,8 @@ extern char *__REDIRECT_NTH (__getwd_warn, (char *__buf), getwd)
>  __fortify_function __nonnull ((1)) __attribute_deprecated__ __wur char *
>  __NTH (getwd (char *__buf))
>  {
> -  if (__bos (__buf) != (size_t) -1)
> -    return __getwd_chk (__buf, __bos (__buf));
> +  if (__glibc_objsize (__buf) != (size_t) -1)
> +    return __getwd_chk (__buf, __glibc_objsize (__buf));
>    return __getwd_warn (__buf);
>  }
>  #endif
> @@ -248,13 +254,14 @@ extern size_t __REDIRECT_NTH (__confstr_chk_warn,
>  __fortify_function size_t
>  __NTH (confstr (int __name, char *__buf, size_t __len))
>  {
> -  if (__bos (__buf) != (size_t) -1)
> +  if (__glibc_objsize (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__len))
> -	return __confstr_chk (__name, __buf, __len, __bos (__buf));
> +	return __confstr_chk (__name, __buf, __len, __glibc_objsize (__buf));
>  
> -      if (__bos (__buf) < __len)
> -	return __confstr_chk_warn (__name, __buf, __len, __bos (__buf));
> +      if (__glibc_objsize (__buf) < __len)
> +	return __confstr_chk_warn (__name, __buf, __len,
> +				   __glibc_objsize (__buf));
>      }
>    return __confstr_alias (__name, __buf, __len);
>  }
> @@ -273,13 +280,13 @@ extern int __REDIRECT_NTH (__getgroups_chk_warn,
>  __fortify_function int
>  __NTH (getgroups (int __size, __gid_t __list[]))
>  {
> -  if (__bos (__list) != (size_t) -1)
> +  if (__glibc_objsize (__list) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__size) || __size < 0)
> -	return __getgroups_chk (__size, __list, __bos (__list));
> +	return __getgroups_chk (__size, __list, __glibc_objsize (__list));
>  
> -      if (__size * sizeof (__gid_t) > __bos (__list))
> -	return __getgroups_chk_warn (__size, __list, __bos (__list));
> +      if (__size * sizeof (__gid_t) > __glibc_objsize (__list))
> +	return __getgroups_chk_warn (__size, __list, __glibc_objsize (__list));
>      }
>    return __getgroups_alias (__size, __list);
>  }
> @@ -300,13 +307,15 @@ extern int __REDIRECT_NTH (__ttyname_r_chk_warn,
>  __fortify_function int
>  __NTH (ttyname_r (int __fd, char *__buf, size_t __buflen))
>  {
> -  if (__bos (__buf) != (size_t) -1)
> +  if (__glibc_objsize (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__buflen))
> -	return __ttyname_r_chk (__fd, __buf, __buflen, __bos (__buf));
> +	return __ttyname_r_chk (__fd, __buf, __buflen,
> +				__glibc_objsize (__buf));
>  
> -      if (__buflen > __bos (__buf))
> -	return __ttyname_r_chk_warn (__fd, __buf, __buflen, __bos (__buf));
> +      if (__buflen > __glibc_objsize (__buf))
> +	return __ttyname_r_chk_warn (__fd, __buf, __buflen,
> +				     __glibc_objsize (__buf));
>      }
>    return __ttyname_r_alias (__fd, __buf, __buflen);
>  }
> @@ -326,13 +335,14 @@ extern int __REDIRECT (__getlogin_r_chk_warn,
>  __fortify_function int
>  getlogin_r (char *__buf, size_t __buflen)
>  {
> -  if (__bos (__buf) != (size_t) -1)
> +  if (__glibc_objsize (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__buflen))
> -	return __getlogin_r_chk (__buf, __buflen, __bos (__buf));
> +	return __getlogin_r_chk (__buf, __buflen, __glibc_objsize (__buf));
>  
> -      if (__buflen > __bos (__buf))
> -	return __getlogin_r_chk_warn (__buf, __buflen, __bos (__buf));
> +      if (__buflen > __glibc_objsize (__buf))
> +	return __getlogin_r_chk_warn (__buf, __buflen,
> +				      __glibc_objsize (__buf));
>      }
>    return __getlogin_r_alias (__buf, __buflen);
>  }
> @@ -354,13 +364,14 @@ extern int __REDIRECT_NTH (__gethostname_chk_warn,
>  __fortify_function int
>  __NTH (gethostname (char *__buf, size_t __buflen))
>  {
> -  if (__bos (__buf) != (size_t) -1)
> +  if (__glibc_objsize (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__buflen))
> -	return __gethostname_chk (__buf, __buflen, __bos (__buf));
> +	return __gethostname_chk (__buf, __buflen, __glibc_objsize (__buf));
>  
> -      if (__buflen > __bos (__buf))
> -	return __gethostname_chk_warn (__buf, __buflen, __bos (__buf));
> +      if (__buflen > __glibc_objsize (__buf))
> +	return __gethostname_chk_warn (__buf, __buflen,
> +				       __glibc_objsize (__buf));
>      }
>    return __gethostname_alias (__buf, __buflen);
>  }
> @@ -384,13 +395,14 @@ extern int __REDIRECT_NTH (__getdomainname_chk_warn,
>  __fortify_function int
>  __NTH (getdomainname (char *__buf, size_t __buflen))
>  {
> -  if (__bos (__buf) != (size_t) -1)
> +  if (__glibc_objsize (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__buflen))
> -	return __getdomainname_chk (__buf, __buflen, __bos (__buf));
> +	return __getdomainname_chk (__buf, __buflen, __glibc_objsize (__buf));
>  
> -      if (__buflen > __bos (__buf))
> -	return __getdomainname_chk_warn (__buf, __buflen, __bos (__buf));
> +      if (__buflen > __glibc_objsize (__buf))
> +	return __getdomainname_chk_warn (__buf, __buflen,
> +					 __glibc_objsize (__buf));
>      }
>    return __getdomainname_alias (__buf, __buflen);
>  }
> diff --git a/socket/bits/socket2.h b/socket/bits/socket2.h
> index c0421ce244..05418ba9c3 100644
> --- a/socket/bits/socket2.h
> +++ b/socket/bits/socket2.h
> @@ -33,13 +33,15 @@ extern ssize_t __REDIRECT (__recv_chk_warn,
>  __fortify_function ssize_t
>  recv (int __fd, void *__buf, size_t __n, int __flags)
>  {
> -  if (__bos0 (__buf) != (size_t) -1)
> +  if (__glibc_objsize0 (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__n))
> -	return __recv_chk (__fd, __buf, __n, __bos0 (__buf), __flags);
> +	return __recv_chk (__fd, __buf, __n, __glibc_objsize0 (__buf),
> +			   __flags);
>  
> -      if (__n > __bos0 (__buf))
> -	return __recv_chk_warn (__fd, __buf, __n, __bos0 (__buf), __flags);
> +      if (__n > __glibc_objsize0 (__buf))
> +	return __recv_chk_warn (__fd, __buf, __n, __glibc_objsize0 (__buf),
> +				__flags);
>      }
>    return __recv_alias (__fd, __buf, __n, __flags);
>  }
> @@ -64,14 +66,14 @@ __fortify_function ssize_t
>  recvfrom (int __fd, void *__restrict __buf, size_t __n, int __flags,
>  	  __SOCKADDR_ARG __addr, socklen_t *__restrict __addr_len)
>  {
> -  if (__bos0 (__buf) != (size_t) -1)
> +  if (__glibc_objsize0 (__buf) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__n))
> -	return __recvfrom_chk (__fd, __buf, __n, __bos0 (__buf), __flags,
> -			       __addr, __addr_len);
> -      if (__n > __bos0 (__buf))
> -	return __recvfrom_chk_warn (__fd, __buf, __n, __bos0 (__buf), __flags,
> -				    __addr, __addr_len);
> +	return __recvfrom_chk (__fd, __buf, __n, __glibc_objsize0 (__buf),
> +			       __flags, __addr, __addr_len);
> +      if (__n > __glibc_objsize0 (__buf))
> +	return __recvfrom_chk_warn (__fd, __buf, __n, __glibc_objsize0 (__buf),
> +				    __flags, __addr, __addr_len);
>      }
>    return __recvfrom_alias (__fd, __buf, __n, __flags, __addr, __addr_len);
>  }
> diff --git a/stdlib/bits/stdlib.h b/stdlib/bits/stdlib.h
> index 9134d3f36b..b495cd6929 100644
> --- a/stdlib/bits/stdlib.h
> +++ b/stdlib/bits/stdlib.h
> @@ -36,13 +36,14 @@ extern char *__REDIRECT_NTH (__realpath_chk_warn,
>  __fortify_function __wur char *
>  __NTH (realpath (const char *__restrict __name, char *__restrict __resolved))
>  {
> -  if (__bos (__resolved) != (size_t) -1)
> +  if (__glibc_objsize (__resolved) != (size_t) -1)
>      {
>  #if defined _LIBC_LIMITS_H_ && defined PATH_MAX
> -      if (__bos (__resolved) < PATH_MAX)
> -	return __realpath_chk_warn (__name, __resolved, __bos (__resolved));
> +      if (__glibc_objsize (__resolved) < PATH_MAX)
> +	return __realpath_chk_warn (__name, __resolved,
> +				    __glibc_objsize (__resolved));
>  #endif
> -      return __realpath_chk (__name, __resolved, __bos (__resolved));
> +      return __realpath_chk (__name, __resolved, __glibc_objsize (__resolved));
>      }
>  
>    return __realpath_alias (__name, __resolved);
> @@ -64,12 +65,14 @@ extern int __REDIRECT_NTH (__ptsname_r_chk_warn,
>  __fortify_function int
>  __NTH (ptsname_r (int __fd, char *__buf, size_t __buflen))
>  {
> -  if (__bos (__buf) != (size_t) -1)
> +  if (__glibc_objsize (__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_chk (__fd, __buf, __buflen,
> +				__glibc_objsize (__buf));
> +      if (__buflen > __glibc_objsize (__buf))
> +	return __ptsname_r_chk_warn (__fd, __buf, __buflen,
> +				     __glibc_objsize (__buf));
>      }
>    return __ptsname_r_alias (__fd, __buf, __buflen);
>  }
> @@ -90,8 +93,9 @@ __NTH (wctomb (char *__s, wchar_t __wchar))
>  #if defined MB_LEN_MAX && MB_LEN_MAX != __STDLIB_MB_LEN_MAX
>  # error "Assumed value of MB_LEN_MAX wrong"
>  #endif
> -  if (__bos (__s) != (size_t) -1 && __STDLIB_MB_LEN_MAX > __bos (__s))
> -    return __wctomb_chk (__s, __wchar, __bos (__s));
> +  if (__glibc_objsize (__s) != (size_t) -1
> +      && __STDLIB_MB_LEN_MAX > __glibc_objsize (__s))
> +    return __wctomb_chk (__s, __wchar, __glibc_objsize (__s));
>    return __wctomb_alias (__s, __wchar);
>  }
>  
> @@ -116,15 +120,16 @@ __fortify_function size_t
>  __NTH (mbstowcs (wchar_t *__restrict __dst, const char *__restrict __src,
>  		 size_t __len))
>  {
> -  if (__bos (__dst) != (size_t) -1)
> +  if (__glibc_objsize (__dst) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__len))
>  	return __mbstowcs_chk (__dst, __src, __len,
> -			       __bos (__dst) / sizeof (wchar_t));
> +			       __glibc_objsize (__dst) / sizeof (wchar_t));
>  
> -      if (__len > __bos (__dst) / sizeof (wchar_t))
> +      if (__len > __glibc_objsize (__dst) / sizeof (wchar_t))
>  	return __mbstowcs_chk_warn (__dst, __src, __len,
> -				     __bos (__dst) / sizeof (wchar_t));
> +				    (__glibc_objsize (__dst)
> +				     / sizeof (wchar_t)));
>      }
>    return __mbstowcs_alias (__dst, __src, __len);
>  }
> @@ -149,12 +154,13 @@ __fortify_function size_t
>  __NTH (wcstombs (char *__restrict __dst, const wchar_t *__restrict __src,
>  		 size_t __len))
>  {
> -  if (__bos (__dst) != (size_t) -1)
> +  if (__glibc_objsize (__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_chk (__dst, __src, __len, __glibc_objsize (__dst));
> +      if (__len > __glibc_objsize (__dst))
> +	return __wcstombs_chk_warn (__dst, __src, __len,
> +				    __glibc_objsize (__dst));
>      }
>    return __wcstombs_alias (__dst, __src, __len);
>  }
> diff --git a/wcsmbs/bits/wchar2.h b/wcsmbs/bits/wchar2.h
> index 86e8e23e76..6631d6f76d 100644
> --- a/wcsmbs/bits/wchar2.h
> +++ b/wcsmbs/bits/wchar2.h
> @@ -39,15 +39,15 @@ __fortify_function wchar_t *
>  __NTH (wmemcpy (wchar_t *__restrict __s1, const wchar_t *__restrict __s2,
>  		size_t __n))
>  {
> -  if (__bos0 (__s1) != (size_t) -1)
> +  if (__glibc_objsize0 (__s1) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__n))
>  	return __wmemcpy_chk (__s1, __s2, __n,
> -			      __bos0 (__s1) / sizeof (wchar_t));
> +			      __glibc_objsize0 (__s1) / sizeof (wchar_t));
>  
> -      if (__n > __bos0 (__s1) / sizeof (wchar_t))
> +      if (__n > __glibc_objsize0 (__s1) / sizeof (wchar_t))
>  	return __wmemcpy_chk_warn (__s1, __s2, __n,
> -				   __bos0 (__s1) / sizeof (wchar_t));
> +				   __glibc_objsize0 (__s1) / sizeof (wchar_t));
>      }
>    return __wmemcpy_alias (__s1, __s2, __n);
>  }
> @@ -67,15 +67,16 @@ extern wchar_t *__REDIRECT_NTH (__wmemmove_chk_warn,
>  __fortify_function wchar_t *
>  __NTH (wmemmove (wchar_t *__s1, const wchar_t *__s2, size_t __n))
>  {
> -  if (__bos0 (__s1) != (size_t) -1)
> +  if (__glibc_objsize0 (__s1) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__n))
>  	return __wmemmove_chk (__s1, __s2, __n,
> -			       __bos0 (__s1) / sizeof (wchar_t));
> +			       __glibc_objsize0 (__s1) / sizeof (wchar_t));
>  
> -      if (__n > __bos0 (__s1) / sizeof (wchar_t))
> +      if (__n > __glibc_objsize0 (__s1) / sizeof (wchar_t))
>  	return __wmemmove_chk_warn (__s1, __s2, __n,
> -				    __bos0 (__s1) / sizeof (wchar_t));
> +				    (__glibc_objsize0 (__s1)
> +				     / sizeof (wchar_t)));
>      }
>    return __wmemmove_alias (__s1, __s2, __n);
>  }
> @@ -100,15 +101,16 @@ __fortify_function wchar_t *
>  __NTH (wmempcpy (wchar_t *__restrict __s1, const wchar_t *__restrict __s2,
>  		 size_t __n))
>  {
> -  if (__bos0 (__s1) != (size_t) -1)
> +  if (__glibc_objsize0 (__s1) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__n))
>  	return __wmempcpy_chk (__s1, __s2, __n,
> -			       __bos0 (__s1) / sizeof (wchar_t));
> +			       __glibc_objsize0 (__s1) / sizeof (wchar_t));
>  
> -      if (__n > __bos0 (__s1) / sizeof (wchar_t))
> +      if (__n > __glibc_objsize0 (__s1) / sizeof (wchar_t))
>  	return __wmempcpy_chk_warn (__s1, __s2, __n,
> -				    __bos0 (__s1) / sizeof (wchar_t));
> +				    (__glibc_objsize0 (__s1)
> +				     / sizeof (wchar_t)));
>      }
>    return __wmempcpy_alias (__s1, __s2, __n);
>  }
> @@ -128,14 +130,15 @@ extern wchar_t *__REDIRECT_NTH (__wmemset_chk_warn,
>  __fortify_function wchar_t *
>  __NTH (wmemset (wchar_t *__s, wchar_t __c, size_t __n))
>  {
> -  if (__bos0 (__s) != (size_t) -1)
> +  if (__glibc_objsize0 (__s) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__n))
> -	return __wmemset_chk (__s, __c, __n, __bos0 (__s) / sizeof (wchar_t));
> +	return __wmemset_chk (__s, __c, __n,
> +			      __glibc_objsize0 (__s) / sizeof (wchar_t));
>  
> -      if (__n > __bos0 (__s) / sizeof (wchar_t))
> +      if (__n > __glibc_objsize0 (__s) / sizeof (wchar_t))
>  	return __wmemset_chk_warn (__s, __c, __n,
> -				   __bos0 (__s) / sizeof (wchar_t));
> +				   __glibc_objsize0 (__s) / sizeof (wchar_t));
>      }
>    return __wmemset_alias (__s, __c, __n);
>  }
> @@ -151,8 +154,9 @@ extern wchar_t *__REDIRECT_NTH (__wcscpy_alias,
>  __fortify_function wchar_t *
>  __NTH (wcscpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
>  {
> -  if (__bos (__dest) != (size_t) -1)
> -    return __wcscpy_chk (__dest, __src, __bos (__dest) / sizeof (wchar_t));
> +  if (__glibc_objsize (__dest) != (size_t) -1)
> +    return __wcscpy_chk (__dest, __src,
> +			 __glibc_objsize (__dest) / sizeof (wchar_t));
>    return __wcscpy_alias (__dest, __src);
>  }
>  
> @@ -167,8 +171,9 @@ extern wchar_t *__REDIRECT_NTH (__wcpcpy_alias,
>  __fortify_function wchar_t *
>  __NTH (wcpcpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
>  {
> -  if (__bos (__dest) != (size_t) -1)
> -    return __wcpcpy_chk (__dest, __src, __bos (__dest) / sizeof (wchar_t));
> +  if (__glibc_objsize (__dest) != (size_t) -1)
> +    return __wcpcpy_chk (__dest, __src,
> +			 __glibc_objsize (__dest) / sizeof (wchar_t));
>    return __wcpcpy_alias (__dest, __src);
>  }
>  
> @@ -191,14 +196,15 @@ __fortify_function wchar_t *
>  __NTH (wcsncpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
>  		size_t __n))
>  {
> -  if (__bos (__dest) != (size_t) -1)
> +  if (__glibc_objsize (__dest) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__n))
>  	return __wcsncpy_chk (__dest, __src, __n,
> -			      __bos (__dest) / sizeof (wchar_t));
> -      if (__n > __bos (__dest) / sizeof (wchar_t))
> +			      __glibc_objsize (__dest) / sizeof (wchar_t));
> +      if (__n > __glibc_objsize (__dest) / sizeof (wchar_t))
>  	return __wcsncpy_chk_warn (__dest, __src, __n,
> -				   __bos (__dest) / sizeof (wchar_t));
> +				   (__glibc_objsize (__dest)
> +				    / sizeof (wchar_t)));
>      }
>    return __wcsncpy_alias (__dest, __src, __n);
>  }
> @@ -222,14 +228,15 @@ __fortify_function wchar_t *
>  __NTH (wcpncpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
>  		size_t __n))
>  {
> -  if (__bos (__dest) != (size_t) -1)
> +  if (__glibc_objsize (__dest) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__n))
>  	return __wcpncpy_chk (__dest, __src, __n,
> -			      __bos (__dest) / sizeof (wchar_t));
> -      if (__n > __bos (__dest) / sizeof (wchar_t))
> +			      __glibc_objsize (__dest) / sizeof (wchar_t));
> +      if (__n > __glibc_objsize (__dest) / sizeof (wchar_t))
>  	return __wcpncpy_chk_warn (__dest, __src, __n,
> -				   __bos (__dest) / sizeof (wchar_t));
> +				   (__glibc_objsize (__dest)
> +				    / sizeof (wchar_t)));
>      }
>    return __wcpncpy_alias (__dest, __src, __n);
>  }
> @@ -245,8 +252,9 @@ extern wchar_t *__REDIRECT_NTH (__wcscat_alias,
>  __fortify_function wchar_t *
>  __NTH (wcscat (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
>  {
> -  if (__bos (__dest) != (size_t) -1)
> -    return __wcscat_chk (__dest, __src, __bos (__dest) / sizeof (wchar_t));
> +  if (__glibc_objsize (__dest) != (size_t) -1)
> +    return __wcscat_chk (__dest, __src,
> +			 __glibc_objsize (__dest) / sizeof (wchar_t));
>    return __wcscat_alias (__dest, __src);
>  }
>  
> @@ -263,9 +271,9 @@ __fortify_function wchar_t *
>  __NTH (wcsncat (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
>  		size_t __n))
>  {
> -  if (__bos (__dest) != (size_t) -1)
> +  if (__glibc_objsize (__dest) != (size_t) -1)
>      return __wcsncat_chk (__dest, __src, __n,
> -			  __bos (__dest) / sizeof (wchar_t));
> +			  __glibc_objsize (__dest) / sizeof (wchar_t));
>    return __wcsncat_alias (__dest, __src, __n);
>  }
>  
> @@ -285,18 +293,18 @@ __fortify_function int
>  __NTH (swprintf (wchar_t *__restrict __s, size_t __n,
>  		 const wchar_t *__restrict __fmt, ...))
>  {
> -  if (__bos (__s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
> +  if (__glibc_objsize (__s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
>      return __swprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
> -			   __bos (__s) / sizeof (wchar_t),
> +			   __glibc_objsize (__s) / 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, ...) \
> -  (__bos (s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1			      \
> +  (__glibc_objsize (s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1		      \
>     ? __swprintf_chk (s, n, __USE_FORTIFY_LEVEL - 1,			      \
> -		     __bos (s) / sizeof (wchar_t), __VA_ARGS__)		      \
> +		     __glibc_objsize (s) / sizeof (wchar_t), __VA_ARGS__)	      \
>     : swprintf (s, n, __VA_ARGS__))
>  #endif
>  
> @@ -315,9 +323,10 @@ __fortify_function int
>  __NTH (vswprintf (wchar_t *__restrict __s, size_t __n,
>  		  const wchar_t *__restrict __fmt, __gnuc_va_list __ap))
>  {
> -  if (__bos (__s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
> +  if (__glibc_objsize (__s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
>      return __vswprintf_chk (__s, __n,  __USE_FORTIFY_LEVEL - 1,
> -			    __bos (__s) / sizeof (wchar_t), __fmt, __ap);
> +			    __glibc_objsize (__s) / sizeof (wchar_t), __fmt,
> +			    __ap);
>    return __vswprintf_alias (__s, __n, __fmt, __ap);
>  }
>  
> @@ -383,14 +392,15 @@ extern wchar_t *__REDIRECT (__fgetws_chk_warn,
>  __fortify_function __wur wchar_t *
>  fgetws (wchar_t *__restrict __s, int __n, __FILE *__restrict __stream)
>  {
> -  if (__bos (__s) != (size_t) -1)
> +  if (__glibc_objsize (__s) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__n) || __n <= 0)
> -	return __fgetws_chk (__s, __bos (__s) / sizeof (wchar_t),
> +	return __fgetws_chk (__s, __glibc_objsize (__s) / sizeof (wchar_t),
>  			     __n, __stream);
>  
> -      if ((size_t) __n > __bos (__s) / sizeof (wchar_t))
> -	return __fgetws_chk_warn (__s, __bos (__s) / sizeof (wchar_t),
> +      if ((size_t) __n > __glibc_objsize (__s) / sizeof (wchar_t))
> +	return __fgetws_chk_warn (__s,
> +				  __glibc_objsize (__s) / sizeof (wchar_t),
>  				  __n, __stream);
>      }
>    return __fgetws_alias (__s, __n, __stream);
> @@ -414,14 +424,17 @@ extern wchar_t *__REDIRECT (__fgetws_unlocked_chk_warn,
>  __fortify_function __wur wchar_t *
>  fgetws_unlocked (wchar_t *__restrict __s, int __n, __FILE *__restrict __stream)
>  {
> -  if (__bos (__s) != (size_t) -1)
> +  if (__glibc_objsize (__s) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__n) || __n <= 0)
> -	return __fgetws_unlocked_chk (__s, __bos (__s) / sizeof (wchar_t),
> +	return __fgetws_unlocked_chk (__s,
> +				      __glibc_objsize (__s) / sizeof (wchar_t),
>  				      __n, __stream);
>  
> -      if ((size_t) __n > __bos (__s) / sizeof (wchar_t))
> -	return __fgetws_unlocked_chk_warn (__s, __bos (__s) / sizeof (wchar_t),
> +      if ((size_t) __n > __glibc_objsize (__s) / sizeof (wchar_t))
> +	return __fgetws_unlocked_chk_warn (__s,
> +					   (__glibc_objsize (__s)
> +					    / sizeof (wchar_t)),
>  					   __n, __stream);
>      }
>    return __fgetws_unlocked_alias (__s, __n, __stream);
> @@ -447,8 +460,9 @@ __NTH (wcrtomb (char *__restrict __s, wchar_t __wchar,
>  #if defined MB_LEN_MAX && MB_LEN_MAX != __WCHAR_MB_LEN_MAX
>  # error "Assumed value of MB_LEN_MAX wrong"
>  #endif
> -  if (__bos (__s) != (size_t) -1 && __WCHAR_MB_LEN_MAX > __bos (__s))
> -    return __wcrtomb_chk (__s, __wchar, __ps, __bos (__s));
> +  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);
>  }
>  
> @@ -474,15 +488,16 @@ __fortify_function size_t
>  __NTH (mbsrtowcs (wchar_t *__restrict __dst, const char **__restrict __src,
>  		  size_t __len, mbstate_t *__restrict __ps))
>  {
> -  if (__bos (__dst) != (size_t) -1)
> +  if (__glibc_objsize (__dst) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__len))
>  	return __mbsrtowcs_chk (__dst, __src, __len, __ps,
> -				__bos (__dst) / sizeof (wchar_t));
> +				__glibc_objsize (__dst) / sizeof (wchar_t));
>  
> -      if (__len > __bos (__dst) / sizeof (wchar_t))
> +      if (__len > __glibc_objsize (__dst) / sizeof (wchar_t))
>  	return __mbsrtowcs_chk_warn (__dst, __src, __len, __ps,
> -				     __bos (__dst) / sizeof (wchar_t));
> +				     (__glibc_objsize (__dst)
> +				      / sizeof (wchar_t)));
>      }
>    return __mbsrtowcs_alias (__dst, __src, __len, __ps);
>  }
> @@ -508,13 +523,15 @@ __fortify_function size_t
>  __NTH (wcsrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
>  		  size_t __len, mbstate_t *__restrict __ps))
>  {
> -  if (__bos (__dst) != (size_t) -1)
> +  if (__glibc_objsize (__dst) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__len))
> -	return __wcsrtombs_chk (__dst, __src, __len, __ps, __bos (__dst));
> +	return __wcsrtombs_chk (__dst, __src, __len, __ps,
> +				__glibc_objsize (__dst));
>  
> -      if (__len > __bos (__dst))
> -	return __wcsrtombs_chk_warn (__dst, __src, __len, __ps, __bos (__dst));
> +      if (__len > __glibc_objsize (__dst))
> +	return __wcsrtombs_chk_warn (__dst, __src, __len, __ps,
> +				     __glibc_objsize (__dst));
>      }
>    return __wcsrtombs_alias (__dst, __src, __len, __ps);
>  }
> @@ -542,15 +559,16 @@ __fortify_function size_t
>  __NTH (mbsnrtowcs (wchar_t *__restrict __dst, const char **__restrict __src,
>  		   size_t __nmc, size_t __len, mbstate_t *__restrict __ps))
>  {
> -  if (__bos (__dst) != (size_t) -1)
> +  if (__glibc_objsize (__dst) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__len))
>  	return __mbsnrtowcs_chk (__dst, __src, __nmc, __len, __ps,
> -				 __bos (__dst) / sizeof (wchar_t));
> +				 __glibc_objsize (__dst) / sizeof (wchar_t));
>  
> -      if (__len > __bos (__dst) / sizeof (wchar_t))
> +      if (__len > __glibc_objsize (__dst) / sizeof (wchar_t))
>  	return __mbsnrtowcs_chk_warn (__dst, __src, __nmc, __len, __ps,
> -				      __bos (__dst) / sizeof (wchar_t));
> +				      (__glibc_objsize (__dst)
> +				       / sizeof (wchar_t)));
>      }
>    return __mbsnrtowcs_alias (__dst, __src, __nmc, __len, __ps);
>  }
> @@ -578,15 +596,15 @@ __fortify_function size_t
>  __NTH (wcsnrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
>  		   size_t __nwc, size_t __len, mbstate_t *__restrict __ps))
>  {
> -  if (__bos (__dst) != (size_t) -1)
> +  if (__glibc_objsize (__dst) != (size_t) -1)
>      {
>        if (!__builtin_constant_p (__len))
>  	return __wcsnrtombs_chk (__dst, __src, __nwc, __len, __ps,
> -				 __bos (__dst));
> +				 __glibc_objsize (__dst));
>  
> -      if (__len > __bos (__dst))
> +      if (__len > __glibc_objsize (__dst))
>  	return __wcsnrtombs_chk_warn (__dst, __src, __nwc, __len, __ps,
> -				      __bos (__dst));
> +				      __glibc_objsize (__dst));
>      }
>    return __wcsnrtombs_alias (__dst, __src, __nwc, __len, __ps);
>  }
>
  

Patch

diff --git a/io/bits/poll2.h b/io/bits/poll2.h
index dca49717db..d204351bd0 100644
--- a/io/bits/poll2.h
+++ b/io/bits/poll2.h
@@ -35,12 +35,13 @@  extern int __REDIRECT (__poll_chk_warn, (struct pollfd *__fds, nfds_t __nfds,
 __fortify_function int
 poll (struct pollfd *__fds, nfds_t __nfds, int __timeout)
 {
-  if (__bos (__fds) != (__SIZE_TYPE__) -1)
+  if (__glibc_objsize (__fds) != (__SIZE_TYPE__) -1)
     {
       if (! __builtin_constant_p (__nfds))
-	return __poll_chk (__fds, __nfds, __timeout, __bos (__fds));
-      else if (__bos (__fds) / sizeof (*__fds) < __nfds)
-	return __poll_chk_warn (__fds, __nfds, __timeout, __bos (__fds));
+	return __poll_chk (__fds, __nfds, __timeout, __glibc_objsize (__fds));
+      else if (__glibc_objsize (__fds) / sizeof (*__fds) < __nfds)
+	return __poll_chk_warn (__fds, __nfds, __timeout,
+				__glibc_objsize (__fds));
     }
 
   return __poll_alias (__fds, __nfds, __timeout);
@@ -65,13 +66,14 @@  __fortify_function int
 ppoll (struct pollfd *__fds, nfds_t __nfds, const struct timespec *__timeout,
        const __sigset_t *__ss)
 {
-  if (__bos (__fds) != (__SIZE_TYPE__) -1)
+  if (__glibc_objsize (__fds) != (__SIZE_TYPE__) -1)
     {
       if (! __builtin_constant_p (__nfds))
-	return __ppoll_chk (__fds, __nfds, __timeout, __ss, __bos (__fds));
-      else if (__bos (__fds) / sizeof (*__fds) < __nfds)
+	return __ppoll_chk (__fds, __nfds, __timeout, __ss,
+			    __glibc_objsize (__fds));
+      else if (__glibc_objsize (__fds) / sizeof (*__fds) < __nfds)
 	return __ppoll_chk_warn (__fds, __nfds, __timeout, __ss,
-				 __bos (__fds));
+				 __glibc_objsize (__fds));
     }
 
   return __ppoll_alias (__fds, __nfds, __timeout, __ss);
diff --git a/libio/bits/stdio.h b/libio/bits/stdio.h
index 6745571ed5..6d1f0f9fc9 100644
--- a/libio/bits/stdio.h
+++ b/libio/bits/stdio.h
@@ -31,7 +31,7 @@ 
 
 
 #ifdef __USE_EXTERN_INLINES
-/* For -D_FORTIFY_SOURCE{,=2} bits/stdio2.h will define a different
+/* For -D_FORTIFY_SOURCE{,=2,=3} bits/stdio2.h will define a different
    inline.  */
 # if !(__USE_FORTIFY_LEVEL > 0 && defined __fortify_function)
 /* Write formatted output to stdout from argument list ARG.  */
diff --git a/libio/bits/stdio2.h b/libio/bits/stdio2.h
index ff9202c2cb..365c25b7b0 100644
--- a/libio/bits/stdio2.h
+++ b/libio/bits/stdio2.h
@@ -36,12 +36,13 @@  __fortify_function int
 __NTH (sprintf (char *__restrict __s, const char *__restrict __fmt, ...))
 {
   return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
-				  __bos (__s), __fmt, __va_arg_pack ());
+				  __glibc_objsize (__s), __fmt,
+				  __va_arg_pack ());
 }
 #elif !defined __cplusplus
 # define sprintf(str, ...) \
-  __builtin___sprintf_chk (str, __USE_FORTIFY_LEVEL - 1, __bos (str), \
-			   __VA_ARGS__)
+  __builtin___sprintf_chk (str, __USE_FORTIFY_LEVEL - 1,		      \
+			   __glibc_objsize (str), __VA_ARGS__)
 #endif
 
 __fortify_function int
@@ -49,7 +50,7 @@  __NTH (vsprintf (char *__restrict __s, const char *__restrict __fmt,
 		 __gnuc_va_list __ap))
 {
   return __builtin___vsprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
-				   __bos (__s), __fmt, __ap);
+				   __glibc_objsize (__s), __fmt, __ap);
 }
 
 #if defined __USE_ISOC99 || defined __USE_UNIX98
@@ -68,12 +69,13 @@  __NTH (snprintf (char *__restrict __s, size_t __n,
 		 const char *__restrict __fmt, ...))
 {
   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
-				   __bos (__s), __fmt, __va_arg_pack ());
+				   __glibc_objsize (__s), __fmt,
+				   __va_arg_pack ());
 }
 # elif !defined __cplusplus
 #  define snprintf(str, len, ...) \
-  __builtin___snprintf_chk (str, len, __USE_FORTIFY_LEVEL - 1, __bos (str), \
-			    __VA_ARGS__)
+  __builtin___snprintf_chk (str, len, __USE_FORTIFY_LEVEL - 1,		      \
+			    __glibc_objsize (str), __VA_ARGS__)
 # endif
 
 __fortify_function int
@@ -81,7 +83,7 @@  __NTH (vsnprintf (char *__restrict __s, size_t __n,
 		  const char *__restrict __fmt, __gnuc_va_list __ap))
 {
   return __builtin___vsnprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
-				    __bos (__s), __fmt, __ap);
+				    __glibc_objsize (__s), __fmt, __ap);
 }
 
 #endif
@@ -237,8 +239,8 @@  extern char *__REDIRECT (__gets_warn, (char *__str), gets)
 __fortify_function __wur char *
 gets (char *__str)
 {
-  if (__bos (__str) != (size_t) -1)
-    return __gets_chk (__str, __bos (__str));
+  if (__glibc_objsize (__str) != (size_t) -1)
+    return __gets_chk (__str, __glibc_objsize (__str));
   return __gets_warn (__str);
 }
 #endif
@@ -259,13 +261,13 @@  extern char *__REDIRECT (__fgets_chk_warn,
 __fortify_function __wur __attr_access ((__write_only__, 1, 2)) char *
 fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
 {
-  if (__bos (__s) != (size_t) -1)
+  if (__glibc_objsize (__s) != (size_t) -1)
     {
       if (!__builtin_constant_p (__n) || __n <= 0)
-	return __fgets_chk (__s, __bos (__s), __n, __stream);
+	return __fgets_chk (__s, __glibc_objsize (__s), __n, __stream);
 
-      if ((size_t) __n > __bos (__s))
-	return __fgets_chk_warn (__s, __bos (__s), __n, __stream);
+      if ((size_t) __n > __glibc_objsize (__s))
+	return __fgets_chk_warn (__s, __glibc_objsize (__s), __n, __stream);
     }
   return __fgets_alias (__s, __n, __stream);
 }
@@ -289,15 +291,17 @@  __fortify_function __wur size_t
 fread (void *__restrict __ptr, size_t __size, size_t __n,
        FILE *__restrict __stream)
 {
-  if (__bos0 (__ptr) != (size_t) -1)
+  if (__glibc_objsize0 (__ptr) != (size_t) -1)
     {
       if (!__builtin_constant_p (__size)
 	  || !__builtin_constant_p (__n)
 	  || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2)))
-	return __fread_chk (__ptr, __bos0 (__ptr), __size, __n, __stream);
+	return __fread_chk (__ptr, __glibc_objsize0 (__ptr), __size, __n,
+			    __stream);
 
-      if (__size * __n > __bos0 (__ptr))
-	return __fread_chk_warn (__ptr, __bos0 (__ptr), __size, __n, __stream);
+      if (__size * __n > __glibc_objsize0 (__ptr))
+	return __fread_chk_warn (__ptr, __glibc_objsize0 (__ptr), __size, __n,
+				 __stream);
     }
   return __fread_alias (__ptr, __size, __n, __stream);
 }
@@ -319,13 +323,15 @@  extern char *__REDIRECT (__fgets_unlocked_chk_warn,
 __fortify_function __wur __attr_access ((__write_only__, 1, 2)) char *
 fgets_unlocked (char *__restrict __s, int __n, FILE *__restrict __stream)
 {
-  if (__bos (__s) != (size_t) -1)
+  if (__glibc_objsize (__s) != (size_t) -1)
     {
       if (!__builtin_constant_p (__n) || __n <= 0)
-	return __fgets_unlocked_chk (__s, __bos (__s), __n, __stream);
+	return __fgets_unlocked_chk (__s, __glibc_objsize (__s), __n,
+				     __stream);
 
-      if ((size_t) __n > __bos (__s))
-	return __fgets_unlocked_chk_warn (__s, __bos (__s), __n, __stream);
+      if ((size_t) __n > __glibc_objsize (__s))
+	return __fgets_unlocked_chk_warn (__s, __glibc_objsize (__s), __n,
+					  __stream);
     }
   return __fgets_unlocked_alias (__s, __n, __stream);
 }
@@ -352,17 +358,17 @@  __fortify_function __wur size_t
 fread_unlocked (void *__restrict __ptr, size_t __size, size_t __n,
 		FILE *__restrict __stream)
 {
-  if (__bos0 (__ptr) != (size_t) -1)
+  if (__glibc_objsize0 (__ptr) != (size_t) -1)
     {
       if (!__builtin_constant_p (__size)
 	  || !__builtin_constant_p (__n)
 	  || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2)))
-	return __fread_unlocked_chk (__ptr, __bos0 (__ptr), __size, __n,
-				     __stream);
+	return __fread_unlocked_chk (__ptr, __glibc_objsize0 (__ptr), __size,
+				     __n, __stream);
 
-      if (__size * __n > __bos0 (__ptr))
-	return __fread_unlocked_chk_warn (__ptr, __bos0 (__ptr), __size, __n,
-					  __stream);
+      if (__size * __n > __glibc_objsize0 (__ptr))
+	return __fread_unlocked_chk_warn (__ptr, __glibc_objsize0 (__ptr),
+					  __size, __n, __stream);
     }
 
 # ifdef __USE_EXTERN_INLINES
diff --git a/posix/bits/unistd.h b/posix/bits/unistd.h
index 725a83eb0d..6c5ed0c618 100644
--- a/posix/bits/unistd.h
+++ b/posix/bits/unistd.h
@@ -35,13 +35,14 @@  extern ssize_t __REDIRECT (__read_chk_warn,
 __fortify_function __wur ssize_t
 read (int __fd, void *__buf, size_t __nbytes)
 {
-  if (__bos0 (__buf) != (size_t) -1)
+  if (__glibc_objsize0 (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__nbytes))
-	return __read_chk (__fd, __buf, __nbytes, __bos0 (__buf));
+	return __read_chk (__fd, __buf, __nbytes, __glibc_objsize0 (__buf));
 
-      if (__nbytes > __bos0 (__buf))
-	return __read_chk_warn (__fd, __buf, __nbytes, __bos0 (__buf));
+      if (__nbytes > __glibc_objsize0 (__buf))
+	return __read_chk_warn (__fd, __buf, __nbytes,
+				__glibc_objsize0 (__buf));
     }
   return __read_alias (__fd, __buf, __nbytes);
 }
@@ -77,14 +78,15 @@  extern ssize_t __REDIRECT (__pread64_chk_warn,
 __fortify_function __wur ssize_t
 pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)
 {
-  if (__bos0 (__buf) != (size_t) -1)
+  if (__glibc_objsize0 (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__nbytes))
-	return __pread_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf));
+	return __pread_chk (__fd, __buf, __nbytes, __offset,
+			    __glibc_objsize0 (__buf));
 
-      if ( __nbytes > __bos0 (__buf))
+      if ( __nbytes > __glibc_objsize0 (__buf))
 	return __pread_chk_warn (__fd, __buf, __nbytes, __offset,
-				 __bos0 (__buf));
+				 __glibc_objsize0 (__buf));
     }
   return __pread_alias (__fd, __buf, __nbytes, __offset);
 }
@@ -92,14 +94,15 @@  pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)
 __fortify_function __wur ssize_t
 pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
 {
-  if (__bos0 (__buf) != (size_t) -1)
+  if (__glibc_objsize0 (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__nbytes))
-	return __pread64_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf));
+	return __pread64_chk (__fd, __buf, __nbytes, __offset,
+			      __glibc_objsize0 (__buf));
 
-      if ( __nbytes > __bos0 (__buf))
+      if ( __nbytes > __glibc_objsize0 (__buf))
 	return __pread64_chk_warn (__fd, __buf, __nbytes, __offset,
-				   __bos0 (__buf));
+				   __glibc_objsize0 (__buf));
     }
 
   return __pread64_alias (__fd, __buf, __nbytes, __offset);
@@ -110,14 +113,15 @@  pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
 __fortify_function __wur ssize_t
 pread64 (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
 {
-  if (__bos0 (__buf) != (size_t) -1)
+  if (__glibc_objsize0 (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__nbytes))
-	return __pread64_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf));
+	return __pread64_chk (__fd, __buf, __nbytes, __offset,
+			      __glibc_objsize0 (__buf));
 
-      if ( __nbytes > __bos0 (__buf))
+      if ( __nbytes > __glibc_objsize0 (__buf))
 	return __pread64_chk_warn (__fd, __buf, __nbytes, __offset,
-				   __bos0 (__buf));
+				   __glibc_objsize0 (__buf));
     }
 
   return __pread64_alias (__fd, __buf, __nbytes, __offset);
@@ -145,13 +149,14 @@  __fortify_function __nonnull ((1, 2)) __wur ssize_t
 __NTH (readlink (const char *__restrict __path, char *__restrict __buf,
 		 size_t __len))
 {
-  if (__bos (__buf) != (size_t) -1)
+  if (__glibc_objsize (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__len))
-	return __readlink_chk (__path, __buf, __len, __bos (__buf));
+	return __readlink_chk (__path, __buf, __len, __glibc_objsize (__buf));
 
-      if ( __len > __bos (__buf))
-	return __readlink_chk_warn (__path, __buf, __len, __bos (__buf));
+      if ( __len > __glibc_objsize (__buf))
+	return __readlink_chk_warn (__path, __buf, __len,
+				    __glibc_objsize (__buf));
     }
   return __readlink_alias (__path, __buf, __len);
 }
@@ -179,14 +184,15 @@  __fortify_function __nonnull ((2, 3)) __wur ssize_t
 __NTH (readlinkat (int __fd, const char *__restrict __path,
 		   char *__restrict __buf, size_t __len))
 {
-  if (__bos (__buf) != (size_t) -1)
+  if (__glibc_objsize (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__len))
-	return __readlinkat_chk (__fd, __path, __buf, __len, __bos (__buf));
+	return __readlinkat_chk (__fd, __path, __buf, __len,
+				 __glibc_objsize (__buf));
 
-      if (__len > __bos (__buf))
+      if (__len > __glibc_objsize (__buf))
 	return __readlinkat_chk_warn (__fd, __path, __buf, __len,
-				      __bos (__buf));
+				      __glibc_objsize (__buf));
     }
   return __readlinkat_alias (__fd, __path, __buf, __len);
 }
@@ -206,13 +212,13 @@  extern char *__REDIRECT_NTH (__getcwd_chk_warn,
 __fortify_function __wur char *
 __NTH (getcwd (char *__buf, size_t __size))
 {
-  if (__bos (__buf) != (size_t) -1)
+  if (__glibc_objsize (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__size))
-	return __getcwd_chk (__buf, __size, __bos (__buf));
+	return __getcwd_chk (__buf, __size, __glibc_objsize (__buf));
 
-      if (__size > __bos (__buf))
-	return __getcwd_chk_warn (__buf, __size, __bos (__buf));
+      if (__size > __glibc_objsize (__buf))
+	return __getcwd_chk_warn (__buf, __size, __glibc_objsize (__buf));
     }
   return __getcwd_alias (__buf, __size);
 }
@@ -227,8 +233,8 @@  extern char *__REDIRECT_NTH (__getwd_warn, (char *__buf), getwd)
 __fortify_function __nonnull ((1)) __attribute_deprecated__ __wur char *
 __NTH (getwd (char *__buf))
 {
-  if (__bos (__buf) != (size_t) -1)
-    return __getwd_chk (__buf, __bos (__buf));
+  if (__glibc_objsize (__buf) != (size_t) -1)
+    return __getwd_chk (__buf, __glibc_objsize (__buf));
   return __getwd_warn (__buf);
 }
 #endif
@@ -248,13 +254,14 @@  extern size_t __REDIRECT_NTH (__confstr_chk_warn,
 __fortify_function size_t
 __NTH (confstr (int __name, char *__buf, size_t __len))
 {
-  if (__bos (__buf) != (size_t) -1)
+  if (__glibc_objsize (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__len))
-	return __confstr_chk (__name, __buf, __len, __bos (__buf));
+	return __confstr_chk (__name, __buf, __len, __glibc_objsize (__buf));
 
-      if (__bos (__buf) < __len)
-	return __confstr_chk_warn (__name, __buf, __len, __bos (__buf));
+      if (__glibc_objsize (__buf) < __len)
+	return __confstr_chk_warn (__name, __buf, __len,
+				   __glibc_objsize (__buf));
     }
   return __confstr_alias (__name, __buf, __len);
 }
@@ -273,13 +280,13 @@  extern int __REDIRECT_NTH (__getgroups_chk_warn,
 __fortify_function int
 __NTH (getgroups (int __size, __gid_t __list[]))
 {
-  if (__bos (__list) != (size_t) -1)
+  if (__glibc_objsize (__list) != (size_t) -1)
     {
       if (!__builtin_constant_p (__size) || __size < 0)
-	return __getgroups_chk (__size, __list, __bos (__list));
+	return __getgroups_chk (__size, __list, __glibc_objsize (__list));
 
-      if (__size * sizeof (__gid_t) > __bos (__list))
-	return __getgroups_chk_warn (__size, __list, __bos (__list));
+      if (__size * sizeof (__gid_t) > __glibc_objsize (__list))
+	return __getgroups_chk_warn (__size, __list, __glibc_objsize (__list));
     }
   return __getgroups_alias (__size, __list);
 }
@@ -300,13 +307,15 @@  extern int __REDIRECT_NTH (__ttyname_r_chk_warn,
 __fortify_function int
 __NTH (ttyname_r (int __fd, char *__buf, size_t __buflen))
 {
-  if (__bos (__buf) != (size_t) -1)
+  if (__glibc_objsize (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__buflen))
-	return __ttyname_r_chk (__fd, __buf, __buflen, __bos (__buf));
+	return __ttyname_r_chk (__fd, __buf, __buflen,
+				__glibc_objsize (__buf));
 
-      if (__buflen > __bos (__buf))
-	return __ttyname_r_chk_warn (__fd, __buf, __buflen, __bos (__buf));
+      if (__buflen > __glibc_objsize (__buf))
+	return __ttyname_r_chk_warn (__fd, __buf, __buflen,
+				     __glibc_objsize (__buf));
     }
   return __ttyname_r_alias (__fd, __buf, __buflen);
 }
@@ -326,13 +335,14 @@  extern int __REDIRECT (__getlogin_r_chk_warn,
 __fortify_function int
 getlogin_r (char *__buf, size_t __buflen)
 {
-  if (__bos (__buf) != (size_t) -1)
+  if (__glibc_objsize (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__buflen))
-	return __getlogin_r_chk (__buf, __buflen, __bos (__buf));
+	return __getlogin_r_chk (__buf, __buflen, __glibc_objsize (__buf));
 
-      if (__buflen > __bos (__buf))
-	return __getlogin_r_chk_warn (__buf, __buflen, __bos (__buf));
+      if (__buflen > __glibc_objsize (__buf))
+	return __getlogin_r_chk_warn (__buf, __buflen,
+				      __glibc_objsize (__buf));
     }
   return __getlogin_r_alias (__buf, __buflen);
 }
@@ -354,13 +364,14 @@  extern int __REDIRECT_NTH (__gethostname_chk_warn,
 __fortify_function int
 __NTH (gethostname (char *__buf, size_t __buflen))
 {
-  if (__bos (__buf) != (size_t) -1)
+  if (__glibc_objsize (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__buflen))
-	return __gethostname_chk (__buf, __buflen, __bos (__buf));
+	return __gethostname_chk (__buf, __buflen, __glibc_objsize (__buf));
 
-      if (__buflen > __bos (__buf))
-	return __gethostname_chk_warn (__buf, __buflen, __bos (__buf));
+      if (__buflen > __glibc_objsize (__buf))
+	return __gethostname_chk_warn (__buf, __buflen,
+				       __glibc_objsize (__buf));
     }
   return __gethostname_alias (__buf, __buflen);
 }
@@ -384,13 +395,14 @@  extern int __REDIRECT_NTH (__getdomainname_chk_warn,
 __fortify_function int
 __NTH (getdomainname (char *__buf, size_t __buflen))
 {
-  if (__bos (__buf) != (size_t) -1)
+  if (__glibc_objsize (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__buflen))
-	return __getdomainname_chk (__buf, __buflen, __bos (__buf));
+	return __getdomainname_chk (__buf, __buflen, __glibc_objsize (__buf));
 
-      if (__buflen > __bos (__buf))
-	return __getdomainname_chk_warn (__buf, __buflen, __bos (__buf));
+      if (__buflen > __glibc_objsize (__buf))
+	return __getdomainname_chk_warn (__buf, __buflen,
+					 __glibc_objsize (__buf));
     }
   return __getdomainname_alias (__buf, __buflen);
 }
diff --git a/socket/bits/socket2.h b/socket/bits/socket2.h
index c0421ce244..05418ba9c3 100644
--- a/socket/bits/socket2.h
+++ b/socket/bits/socket2.h
@@ -33,13 +33,15 @@  extern ssize_t __REDIRECT (__recv_chk_warn,
 __fortify_function ssize_t
 recv (int __fd, void *__buf, size_t __n, int __flags)
 {
-  if (__bos0 (__buf) != (size_t) -1)
+  if (__glibc_objsize0 (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__n))
-	return __recv_chk (__fd, __buf, __n, __bos0 (__buf), __flags);
+	return __recv_chk (__fd, __buf, __n, __glibc_objsize0 (__buf),
+			   __flags);
 
-      if (__n > __bos0 (__buf))
-	return __recv_chk_warn (__fd, __buf, __n, __bos0 (__buf), __flags);
+      if (__n > __glibc_objsize0 (__buf))
+	return __recv_chk_warn (__fd, __buf, __n, __glibc_objsize0 (__buf),
+				__flags);
     }
   return __recv_alias (__fd, __buf, __n, __flags);
 }
@@ -64,14 +66,14 @@  __fortify_function ssize_t
 recvfrom (int __fd, void *__restrict __buf, size_t __n, int __flags,
 	  __SOCKADDR_ARG __addr, socklen_t *__restrict __addr_len)
 {
-  if (__bos0 (__buf) != (size_t) -1)
+  if (__glibc_objsize0 (__buf) != (size_t) -1)
     {
       if (!__builtin_constant_p (__n))
-	return __recvfrom_chk (__fd, __buf, __n, __bos0 (__buf), __flags,
-			       __addr, __addr_len);
-      if (__n > __bos0 (__buf))
-	return __recvfrom_chk_warn (__fd, __buf, __n, __bos0 (__buf), __flags,
-				    __addr, __addr_len);
+	return __recvfrom_chk (__fd, __buf, __n, __glibc_objsize0 (__buf),
+			       __flags, __addr, __addr_len);
+      if (__n > __glibc_objsize0 (__buf))
+	return __recvfrom_chk_warn (__fd, __buf, __n, __glibc_objsize0 (__buf),
+				    __flags, __addr, __addr_len);
     }
   return __recvfrom_alias (__fd, __buf, __n, __flags, __addr, __addr_len);
 }
diff --git a/stdlib/bits/stdlib.h b/stdlib/bits/stdlib.h
index 9134d3f36b..b495cd6929 100644
--- a/stdlib/bits/stdlib.h
+++ b/stdlib/bits/stdlib.h
@@ -36,13 +36,14 @@  extern char *__REDIRECT_NTH (__realpath_chk_warn,
 __fortify_function __wur char *
 __NTH (realpath (const char *__restrict __name, char *__restrict __resolved))
 {
-  if (__bos (__resolved) != (size_t) -1)
+  if (__glibc_objsize (__resolved) != (size_t) -1)
     {
 #if defined _LIBC_LIMITS_H_ && defined PATH_MAX
-      if (__bos (__resolved) < PATH_MAX)
-	return __realpath_chk_warn (__name, __resolved, __bos (__resolved));
+      if (__glibc_objsize (__resolved) < PATH_MAX)
+	return __realpath_chk_warn (__name, __resolved,
+				    __glibc_objsize (__resolved));
 #endif
-      return __realpath_chk (__name, __resolved, __bos (__resolved));
+      return __realpath_chk (__name, __resolved, __glibc_objsize (__resolved));
     }
 
   return __realpath_alias (__name, __resolved);
@@ -64,12 +65,14 @@  extern int __REDIRECT_NTH (__ptsname_r_chk_warn,
 __fortify_function int
 __NTH (ptsname_r (int __fd, char *__buf, size_t __buflen))
 {
-  if (__bos (__buf) != (size_t) -1)
+  if (__glibc_objsize (__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_chk (__fd, __buf, __buflen,
+				__glibc_objsize (__buf));
+      if (__buflen > __glibc_objsize (__buf))
+	return __ptsname_r_chk_warn (__fd, __buf, __buflen,
+				     __glibc_objsize (__buf));
     }
   return __ptsname_r_alias (__fd, __buf, __buflen);
 }
@@ -90,8 +93,9 @@  __NTH (wctomb (char *__s, wchar_t __wchar))
 #if defined MB_LEN_MAX && MB_LEN_MAX != __STDLIB_MB_LEN_MAX
 # error "Assumed value of MB_LEN_MAX wrong"
 #endif
-  if (__bos (__s) != (size_t) -1 && __STDLIB_MB_LEN_MAX > __bos (__s))
-    return __wctomb_chk (__s, __wchar, __bos (__s));
+  if (__glibc_objsize (__s) != (size_t) -1
+      && __STDLIB_MB_LEN_MAX > __glibc_objsize (__s))
+    return __wctomb_chk (__s, __wchar, __glibc_objsize (__s));
   return __wctomb_alias (__s, __wchar);
 }
 
@@ -116,15 +120,16 @@  __fortify_function size_t
 __NTH (mbstowcs (wchar_t *__restrict __dst, const char *__restrict __src,
 		 size_t __len))
 {
-  if (__bos (__dst) != (size_t) -1)
+  if (__glibc_objsize (__dst) != (size_t) -1)
     {
       if (!__builtin_constant_p (__len))
 	return __mbstowcs_chk (__dst, __src, __len,
-			       __bos (__dst) / sizeof (wchar_t));
+			       __glibc_objsize (__dst) / sizeof (wchar_t));
 
-      if (__len > __bos (__dst) / sizeof (wchar_t))
+      if (__len > __glibc_objsize (__dst) / sizeof (wchar_t))
 	return __mbstowcs_chk_warn (__dst, __src, __len,
-				     __bos (__dst) / sizeof (wchar_t));
+				    (__glibc_objsize (__dst)
+				     / sizeof (wchar_t)));
     }
   return __mbstowcs_alias (__dst, __src, __len);
 }
@@ -149,12 +154,13 @@  __fortify_function size_t
 __NTH (wcstombs (char *__restrict __dst, const wchar_t *__restrict __src,
 		 size_t __len))
 {
-  if (__bos (__dst) != (size_t) -1)
+  if (__glibc_objsize (__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_chk (__dst, __src, __len, __glibc_objsize (__dst));
+      if (__len > __glibc_objsize (__dst))
+	return __wcstombs_chk_warn (__dst, __src, __len,
+				    __glibc_objsize (__dst));
     }
   return __wcstombs_alias (__dst, __src, __len);
 }
diff --git a/wcsmbs/bits/wchar2.h b/wcsmbs/bits/wchar2.h
index 86e8e23e76..6631d6f76d 100644
--- a/wcsmbs/bits/wchar2.h
+++ b/wcsmbs/bits/wchar2.h
@@ -39,15 +39,15 @@  __fortify_function wchar_t *
 __NTH (wmemcpy (wchar_t *__restrict __s1, const wchar_t *__restrict __s2,
 		size_t __n))
 {
-  if (__bos0 (__s1) != (size_t) -1)
+  if (__glibc_objsize0 (__s1) != (size_t) -1)
     {
       if (!__builtin_constant_p (__n))
 	return __wmemcpy_chk (__s1, __s2, __n,
-			      __bos0 (__s1) / sizeof (wchar_t));
+			      __glibc_objsize0 (__s1) / sizeof (wchar_t));
 
-      if (__n > __bos0 (__s1) / sizeof (wchar_t))
+      if (__n > __glibc_objsize0 (__s1) / sizeof (wchar_t))
 	return __wmemcpy_chk_warn (__s1, __s2, __n,
-				   __bos0 (__s1) / sizeof (wchar_t));
+				   __glibc_objsize0 (__s1) / sizeof (wchar_t));
     }
   return __wmemcpy_alias (__s1, __s2, __n);
 }
@@ -67,15 +67,16 @@  extern wchar_t *__REDIRECT_NTH (__wmemmove_chk_warn,
 __fortify_function wchar_t *
 __NTH (wmemmove (wchar_t *__s1, const wchar_t *__s2, size_t __n))
 {
-  if (__bos0 (__s1) != (size_t) -1)
+  if (__glibc_objsize0 (__s1) != (size_t) -1)
     {
       if (!__builtin_constant_p (__n))
 	return __wmemmove_chk (__s1, __s2, __n,
-			       __bos0 (__s1) / sizeof (wchar_t));
+			       __glibc_objsize0 (__s1) / sizeof (wchar_t));
 
-      if (__n > __bos0 (__s1) / sizeof (wchar_t))
+      if (__n > __glibc_objsize0 (__s1) / sizeof (wchar_t))
 	return __wmemmove_chk_warn (__s1, __s2, __n,
-				    __bos0 (__s1) / sizeof (wchar_t));
+				    (__glibc_objsize0 (__s1)
+				     / sizeof (wchar_t)));
     }
   return __wmemmove_alias (__s1, __s2, __n);
 }
@@ -100,15 +101,16 @@  __fortify_function wchar_t *
 __NTH (wmempcpy (wchar_t *__restrict __s1, const wchar_t *__restrict __s2,
 		 size_t __n))
 {
-  if (__bos0 (__s1) != (size_t) -1)
+  if (__glibc_objsize0 (__s1) != (size_t) -1)
     {
       if (!__builtin_constant_p (__n))
 	return __wmempcpy_chk (__s1, __s2, __n,
-			       __bos0 (__s1) / sizeof (wchar_t));
+			       __glibc_objsize0 (__s1) / sizeof (wchar_t));
 
-      if (__n > __bos0 (__s1) / sizeof (wchar_t))
+      if (__n > __glibc_objsize0 (__s1) / sizeof (wchar_t))
 	return __wmempcpy_chk_warn (__s1, __s2, __n,
-				    __bos0 (__s1) / sizeof (wchar_t));
+				    (__glibc_objsize0 (__s1)
+				     / sizeof (wchar_t)));
     }
   return __wmempcpy_alias (__s1, __s2, __n);
 }
@@ -128,14 +130,15 @@  extern wchar_t *__REDIRECT_NTH (__wmemset_chk_warn,
 __fortify_function wchar_t *
 __NTH (wmemset (wchar_t *__s, wchar_t __c, size_t __n))
 {
-  if (__bos0 (__s) != (size_t) -1)
+  if (__glibc_objsize0 (__s) != (size_t) -1)
     {
       if (!__builtin_constant_p (__n))
-	return __wmemset_chk (__s, __c, __n, __bos0 (__s) / sizeof (wchar_t));
+	return __wmemset_chk (__s, __c, __n,
+			      __glibc_objsize0 (__s) / sizeof (wchar_t));
 
-      if (__n > __bos0 (__s) / sizeof (wchar_t))
+      if (__n > __glibc_objsize0 (__s) / sizeof (wchar_t))
 	return __wmemset_chk_warn (__s, __c, __n,
-				   __bos0 (__s) / sizeof (wchar_t));
+				   __glibc_objsize0 (__s) / sizeof (wchar_t));
     }
   return __wmemset_alias (__s, __c, __n);
 }
@@ -151,8 +154,9 @@  extern wchar_t *__REDIRECT_NTH (__wcscpy_alias,
 __fortify_function wchar_t *
 __NTH (wcscpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
 {
-  if (__bos (__dest) != (size_t) -1)
-    return __wcscpy_chk (__dest, __src, __bos (__dest) / sizeof (wchar_t));
+  if (__glibc_objsize (__dest) != (size_t) -1)
+    return __wcscpy_chk (__dest, __src,
+			 __glibc_objsize (__dest) / sizeof (wchar_t));
   return __wcscpy_alias (__dest, __src);
 }
 
@@ -167,8 +171,9 @@  extern wchar_t *__REDIRECT_NTH (__wcpcpy_alias,
 __fortify_function wchar_t *
 __NTH (wcpcpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
 {
-  if (__bos (__dest) != (size_t) -1)
-    return __wcpcpy_chk (__dest, __src, __bos (__dest) / sizeof (wchar_t));
+  if (__glibc_objsize (__dest) != (size_t) -1)
+    return __wcpcpy_chk (__dest, __src,
+			 __glibc_objsize (__dest) / sizeof (wchar_t));
   return __wcpcpy_alias (__dest, __src);
 }
 
@@ -191,14 +196,15 @@  __fortify_function wchar_t *
 __NTH (wcsncpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
 		size_t __n))
 {
-  if (__bos (__dest) != (size_t) -1)
+  if (__glibc_objsize (__dest) != (size_t) -1)
     {
       if (!__builtin_constant_p (__n))
 	return __wcsncpy_chk (__dest, __src, __n,
-			      __bos (__dest) / sizeof (wchar_t));
-      if (__n > __bos (__dest) / sizeof (wchar_t))
+			      __glibc_objsize (__dest) / sizeof (wchar_t));
+      if (__n > __glibc_objsize (__dest) / sizeof (wchar_t))
 	return __wcsncpy_chk_warn (__dest, __src, __n,
-				   __bos (__dest) / sizeof (wchar_t));
+				   (__glibc_objsize (__dest)
+				    / sizeof (wchar_t)));
     }
   return __wcsncpy_alias (__dest, __src, __n);
 }
@@ -222,14 +228,15 @@  __fortify_function wchar_t *
 __NTH (wcpncpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
 		size_t __n))
 {
-  if (__bos (__dest) != (size_t) -1)
+  if (__glibc_objsize (__dest) != (size_t) -1)
     {
       if (!__builtin_constant_p (__n))
 	return __wcpncpy_chk (__dest, __src, __n,
-			      __bos (__dest) / sizeof (wchar_t));
-      if (__n > __bos (__dest) / sizeof (wchar_t))
+			      __glibc_objsize (__dest) / sizeof (wchar_t));
+      if (__n > __glibc_objsize (__dest) / sizeof (wchar_t))
 	return __wcpncpy_chk_warn (__dest, __src, __n,
-				   __bos (__dest) / sizeof (wchar_t));
+				   (__glibc_objsize (__dest)
+				    / sizeof (wchar_t)));
     }
   return __wcpncpy_alias (__dest, __src, __n);
 }
@@ -245,8 +252,9 @@  extern wchar_t *__REDIRECT_NTH (__wcscat_alias,
 __fortify_function wchar_t *
 __NTH (wcscat (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
 {
-  if (__bos (__dest) != (size_t) -1)
-    return __wcscat_chk (__dest, __src, __bos (__dest) / sizeof (wchar_t));
+  if (__glibc_objsize (__dest) != (size_t) -1)
+    return __wcscat_chk (__dest, __src,
+			 __glibc_objsize (__dest) / sizeof (wchar_t));
   return __wcscat_alias (__dest, __src);
 }
 
@@ -263,9 +271,9 @@  __fortify_function wchar_t *
 __NTH (wcsncat (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
 		size_t __n))
 {
-  if (__bos (__dest) != (size_t) -1)
+  if (__glibc_objsize (__dest) != (size_t) -1)
     return __wcsncat_chk (__dest, __src, __n,
-			  __bos (__dest) / sizeof (wchar_t));
+			  __glibc_objsize (__dest) / sizeof (wchar_t));
   return __wcsncat_alias (__dest, __src, __n);
 }
 
@@ -285,18 +293,18 @@  __fortify_function int
 __NTH (swprintf (wchar_t *__restrict __s, size_t __n,
 		 const wchar_t *__restrict __fmt, ...))
 {
-  if (__bos (__s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
+  if (__glibc_objsize (__s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
     return __swprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
-			   __bos (__s) / sizeof (wchar_t),
+			   __glibc_objsize (__s) / 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, ...) \
-  (__bos (s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1			      \
+  (__glibc_objsize (s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1		      \
    ? __swprintf_chk (s, n, __USE_FORTIFY_LEVEL - 1,			      \
-		     __bos (s) / sizeof (wchar_t), __VA_ARGS__)		      \
+		     __glibc_objsize (s) / sizeof (wchar_t), __VA_ARGS__)	      \
    : swprintf (s, n, __VA_ARGS__))
 #endif
 
@@ -315,9 +323,10 @@  __fortify_function int
 __NTH (vswprintf (wchar_t *__restrict __s, size_t __n,
 		  const wchar_t *__restrict __fmt, __gnuc_va_list __ap))
 {
-  if (__bos (__s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
+  if (__glibc_objsize (__s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
     return __vswprintf_chk (__s, __n,  __USE_FORTIFY_LEVEL - 1,
-			    __bos (__s) / sizeof (wchar_t), __fmt, __ap);
+			    __glibc_objsize (__s) / sizeof (wchar_t), __fmt,
+			    __ap);
   return __vswprintf_alias (__s, __n, __fmt, __ap);
 }
 
@@ -383,14 +392,15 @@  extern wchar_t *__REDIRECT (__fgetws_chk_warn,
 __fortify_function __wur wchar_t *
 fgetws (wchar_t *__restrict __s, int __n, __FILE *__restrict __stream)
 {
-  if (__bos (__s) != (size_t) -1)
+  if (__glibc_objsize (__s) != (size_t) -1)
     {
       if (!__builtin_constant_p (__n) || __n <= 0)
-	return __fgetws_chk (__s, __bos (__s) / sizeof (wchar_t),
+	return __fgetws_chk (__s, __glibc_objsize (__s) / sizeof (wchar_t),
 			     __n, __stream);
 
-      if ((size_t) __n > __bos (__s) / sizeof (wchar_t))
-	return __fgetws_chk_warn (__s, __bos (__s) / sizeof (wchar_t),
+      if ((size_t) __n > __glibc_objsize (__s) / sizeof (wchar_t))
+	return __fgetws_chk_warn (__s,
+				  __glibc_objsize (__s) / sizeof (wchar_t),
 				  __n, __stream);
     }
   return __fgetws_alias (__s, __n, __stream);
@@ -414,14 +424,17 @@  extern wchar_t *__REDIRECT (__fgetws_unlocked_chk_warn,
 __fortify_function __wur wchar_t *
 fgetws_unlocked (wchar_t *__restrict __s, int __n, __FILE *__restrict __stream)
 {
-  if (__bos (__s) != (size_t) -1)
+  if (__glibc_objsize (__s) != (size_t) -1)
     {
       if (!__builtin_constant_p (__n) || __n <= 0)
-	return __fgetws_unlocked_chk (__s, __bos (__s) / sizeof (wchar_t),
+	return __fgetws_unlocked_chk (__s,
+				      __glibc_objsize (__s) / sizeof (wchar_t),
 				      __n, __stream);
 
-      if ((size_t) __n > __bos (__s) / sizeof (wchar_t))
-	return __fgetws_unlocked_chk_warn (__s, __bos (__s) / sizeof (wchar_t),
+      if ((size_t) __n > __glibc_objsize (__s) / sizeof (wchar_t))
+	return __fgetws_unlocked_chk_warn (__s,
+					   (__glibc_objsize (__s)
+					    / sizeof (wchar_t)),
 					   __n, __stream);
     }
   return __fgetws_unlocked_alias (__s, __n, __stream);
@@ -447,8 +460,9 @@  __NTH (wcrtomb (char *__restrict __s, wchar_t __wchar,
 #if defined MB_LEN_MAX && MB_LEN_MAX != __WCHAR_MB_LEN_MAX
 # error "Assumed value of MB_LEN_MAX wrong"
 #endif
-  if (__bos (__s) != (size_t) -1 && __WCHAR_MB_LEN_MAX > __bos (__s))
-    return __wcrtomb_chk (__s, __wchar, __ps, __bos (__s));
+  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);
 }
 
@@ -474,15 +488,16 @@  __fortify_function size_t
 __NTH (mbsrtowcs (wchar_t *__restrict __dst, const char **__restrict __src,
 		  size_t __len, mbstate_t *__restrict __ps))
 {
-  if (__bos (__dst) != (size_t) -1)
+  if (__glibc_objsize (__dst) != (size_t) -1)
     {
       if (!__builtin_constant_p (__len))
 	return __mbsrtowcs_chk (__dst, __src, __len, __ps,
-				__bos (__dst) / sizeof (wchar_t));
+				__glibc_objsize (__dst) / sizeof (wchar_t));
 
-      if (__len > __bos (__dst) / sizeof (wchar_t))
+      if (__len > __glibc_objsize (__dst) / sizeof (wchar_t))
 	return __mbsrtowcs_chk_warn (__dst, __src, __len, __ps,
-				     __bos (__dst) / sizeof (wchar_t));
+				     (__glibc_objsize (__dst)
+				      / sizeof (wchar_t)));
     }
   return __mbsrtowcs_alias (__dst, __src, __len, __ps);
 }
@@ -508,13 +523,15 @@  __fortify_function size_t
 __NTH (wcsrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
 		  size_t __len, mbstate_t *__restrict __ps))
 {
-  if (__bos (__dst) != (size_t) -1)
+  if (__glibc_objsize (__dst) != (size_t) -1)
     {
       if (!__builtin_constant_p (__len))
-	return __wcsrtombs_chk (__dst, __src, __len, __ps, __bos (__dst));
+	return __wcsrtombs_chk (__dst, __src, __len, __ps,
+				__glibc_objsize (__dst));
 
-      if (__len > __bos (__dst))
-	return __wcsrtombs_chk_warn (__dst, __src, __len, __ps, __bos (__dst));
+      if (__len > __glibc_objsize (__dst))
+	return __wcsrtombs_chk_warn (__dst, __src, __len, __ps,
+				     __glibc_objsize (__dst));
     }
   return __wcsrtombs_alias (__dst, __src, __len, __ps);
 }
@@ -542,15 +559,16 @@  __fortify_function size_t
 __NTH (mbsnrtowcs (wchar_t *__restrict __dst, const char **__restrict __src,
 		   size_t __nmc, size_t __len, mbstate_t *__restrict __ps))
 {
-  if (__bos (__dst) != (size_t) -1)
+  if (__glibc_objsize (__dst) != (size_t) -1)
     {
       if (!__builtin_constant_p (__len))
 	return __mbsnrtowcs_chk (__dst, __src, __nmc, __len, __ps,
-				 __bos (__dst) / sizeof (wchar_t));
+				 __glibc_objsize (__dst) / sizeof (wchar_t));
 
-      if (__len > __bos (__dst) / sizeof (wchar_t))
+      if (__len > __glibc_objsize (__dst) / sizeof (wchar_t))
 	return __mbsnrtowcs_chk_warn (__dst, __src, __nmc, __len, __ps,
-				      __bos (__dst) / sizeof (wchar_t));
+				      (__glibc_objsize (__dst)
+				       / sizeof (wchar_t)));
     }
   return __mbsnrtowcs_alias (__dst, __src, __nmc, __len, __ps);
 }
@@ -578,15 +596,15 @@  __fortify_function size_t
 __NTH (wcsnrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
 		   size_t __nwc, size_t __len, mbstate_t *__restrict __ps))
 {
-  if (__bos (__dst) != (size_t) -1)
+  if (__glibc_objsize (__dst) != (size_t) -1)
     {
       if (!__builtin_constant_p (__len))
 	return __wcsnrtombs_chk (__dst, __src, __nwc, __len, __ps,
-				 __bos (__dst));
+				 __glibc_objsize (__dst));
 
-      if (__len > __bos (__dst))
+      if (__len > __glibc_objsize (__dst))
 	return __wcsnrtombs_chk_warn (__dst, __src, __nwc, __len, __ps,
-				      __bos (__dst));
+				      __glibc_objsize (__dst));
     }
   return __wcsnrtombs_alias (__dst, __src, __nwc, __len, __ps);
 }