[PATCH v3] Add _FORTIFY_SOURCE implementation documentation [BZ #28998]

[Siddhesh Poyarekar]

On 2023-01-09 10:32, Florian Weimer wrote:
> * Siddhesh Poyarekar:
> 
>> +The following functions are fortified in @theglibc{}:
>> +
>> +@itemize @bullet
>> +@item @code{asprintf}: Replaced with @code{__asprintf_chk}.
>> +
>> +@item @code{confstr}: Replaced with @code{__confstr_chk}.
>> +
>> +@item @code{dprintf}: Replaced with @code{__dprintf_chk}.
> 
> For the *printf* functions, the replacement depends on the architecture
> and compilation mode (the concrete type of long double).

Oh yeah, I had missed the __nldbl_* ones and, TIL about the ieee128 
ones.  And guess what, I tried another way to look up this list (through 
Versions files) and found that mq_open is also fortified!

>> +@item @code{explicit_bzero}: Replaced with @code{__explicit_bzero_chk}.
>> +
>> +@item @code{FD_SET}: Replaced with @code{__fdelt_chk}.
>> +
>> +@item @code{FD_CLR}: Replaced with @code{__fdelt_chk}.
>> +
>> +@item @code{FD_ISSET}: Replaced with @code{__fdelt_chk}.
> 
> These three macros (not functions) aren't replaced, but enhanced.
> 
> Maybe just mentioned the list of functions/macros, and point towards the
> general pattern, but also note the presence of exceptions?

Ack, v4 coming up.

Thanks,
Sid