[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <5vwwt3eqyxkwcdix7e5scky7um5gr33rov7rxmlr6c4zplh3ei@64ez3dltdzc3>
Date: Wed, 25 Jun 2025 20:21:48 +0200
From: Alejandro Colomar <alx@...nel.org>
To: Wilco Dijkstra <Wilco.Dijkstra@....com>
Cc: Eric Blake <eblake@...hat.com>,
"libc-alpha@...rceware.org" <libc-alpha@...rceware.org>, Florian Weimer <fweimer@...hat.com>,
"bug-gnulib@....org" <bug-gnulib@....org>, "musl@...ts.openwall.com" <musl@...ts.openwall.com>,
наб <nabijaczleweli@...ijaczleweli.xyz>, Douglas McIlroy <douglas.mcilroy@...tmouth.edu>,
Paul Eggert <eggert@...ucla.edu>, Robert Seacord <rcseacord@...il.com>,
Elliott Hughes <enh@...gle.com>, Bruno Haible <bruno@...sp.org>,
JeanHeyd Meneide <phdofthehouse@...il.com>, Rich Felker <dalias@...c.org>,
Adhemerval Zanella Netto <adhemerval.zanella@...aro.org>, Joseph Myers <josmyers@...hat.com>,
Laurent Bercot <ska-dietlibc@...rnet.org>, Andreas Schwab <schwab@...e.de>, Thorsten Glaser <tg@...bsd.de>,
Vincent Lefevre <vincent@...c17.net>, Mark Harris <mark.hsj@...il.com>,
Collin Funk <collin.funk1@...il.com>, DJ Delorie <dj@...hat.com>,
Cristian Rodríguez <cristian@...riguez.im>, Siddhesh Poyarekar <siddhesh@...plt.org>,
Sam James <sam@...too.org>, Mark Wielaard <mark@...mp.org>,
"Maciej W. Rozycki" <macro@...hat.com>, Martin Uecker <ma.uecker@...il.com>,
Christopher Bazley <chris.bazley.wg14@...il.com>, "eskil@...ession.se" <eskil@...ession.se>
Subject: Re: alx-0029r4 - Restore the traditional realloc(3) specification
Hi Wilco,
On Wed, Jun 25, 2025 at 06:07:06PM +0000, Wilco Dijkstra wrote:
> In principle a realloc that shrinks a non-NULL block does never need to fail.
> If it can't shrink the current block (either because internal design means it
> can't make it any smaller or because it doesn't have memory for a new
> smaller block) then it should preferably return the original pointer instead
> of returning NULL and taking the failure path.
>
> So I'm wondering whether we should more clearly specify this - whenever
> it's possible to not fail, don't return NULL?
As Rich Felker said, musl has very good reasons for failing, several of
them. Look at his comments in the thread.
Have a lovely day!
Alex
--
<https://www.alejandro-colomar.es/>
Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
