Date: Tue, 21 Jul 2020 20:58:04 +0200 From: Florian Weimer <fw@...eb.enyo.de> To: Rich Felker <dalias@...c.org> Cc: Ariadne Conill <ariadne@...eferenced.org>, musl@...ts.openwall.com Subject: Re: perhaps we should add re[c]allocarray? * Rich Felker: > recallocarray presumably needs to zero the new part which means it > needs to know the old exact size, which means it depends on having > either knowledge of implementation internals or a working, exact > malloc_usable_size (AFAIK all legacy/existing ones except musl > mallocng are broken and return a value greater than the originally > allocated size). The caller has to pass the old member count to recallocarray, in an additional argument. I think this avoids this particular issue, and also makes it easy to achive interposition-safety.
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