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From: NRK <nrk@disroot.org>
To: musl@lists.openwall.com
Cc: "Jₑₙₛ Gustedt" <jens.gustedt@inria.fr>,
	"Aaron Peter Bachmann" <aaron_ng@inode.at>
Subject: Re: [musl] c23 memset_explicit()
Date: Tue, 19 Mar 2024 16:37:21 +0000	[thread overview]
Message-ID: <fxg6zacf3cvsjklt5rha6ty2qbxvthwuo352dxtzlmo4upqumu@42j5ziybhe6p> (raw)
In-Reply-To: <20240319140213.GJ4163@brightrain.aerifal.cx>

> I'm not sure what the builtin thing was.

IIRC, the idea was that if memset_explicit() is recognized by compilers
then they can make better decision. E.g if the data is held in a
register without any further copy in memory, then compiler can just
clear the register instead of spilling it onto the stack and calling
memset_explicit() on it.

But that's not really relevant for libcs trying to add support for it.
Both of them can co-exist.

- NRK

      parent reply	other threads:[~2024-03-19 16:37 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-19 11:18 Aaron Peter Bachmann
2024-03-19 13:50 ` Jₑₙₛ Gustedt
2024-03-19 14:02   ` Rich Felker
2024-03-19 14:24     ` Jₑₙₛ Gustedt
2024-03-19 15:51     ` Aaron Peter Bachmann
2024-03-19 16:19       ` Rich Felker
2024-03-20  7:42         ` [musl] Re: Potential bug in __res_msend_rc() wrt to union, initialization Aaron Peter Bachmann
2024-03-19 16:37     ` NRK [this message]

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