From: NRK <nrk@disroot.org>
To: musl@lists.openwall.com
Cc: Mike Cui <cuicui@gmail.com>
Subject: Re: [musl] Potential bug in __res_msend_rc() wrt to union initialization.
Date: Mon, 18 Mar 2024 22:22:55 +0000 [thread overview]
Message-ID: <627epdel4gidvu46u5ua2mclieqy3wwqbs7sxjgtgrsmkvn4up@ehu5ru6micnr> (raw)
In-Reply-To: <20240318213441.GH4163@brightrain.aerifal.cx>
On Mon, Mar 18, 2024 at 05:34:42PM -0400, Rich Felker wrote:
> If the clang interpretation is going to be this, we can just reorder
> the union members so that the largest one is first.
Another option is to utilize implicit static initializer rules:
| if it is a union, the first named member is initialized (recursively)
| according to these rules, and any padding is initialized to zero bits;
So something like:
static union u zero;
union u u = zero;
Though, the "padding bits" part was added in C11 and wasn't present in
C99 in case you want to be pedantic about C99 conformance.
- NRK
next prev parent reply other threads:[~2024-03-18 22:23 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-18 19:56 Mike Cui
2024-03-18 21:34 ` Rich Felker
2024-03-18 22:22 ` NRK [this message]
2024-03-18 22:39 ` [musl] Potential bug in __res_msend_rc() wrt to union initialisation Thorsten Glaser
2024-03-19 0:01 ` [musl] Potential bug in __res_msend_rc() wrt to union initialization Mike Cui
2024-03-19 13:18 ` Rich Felker
2024-03-19 15:04 ` Mike Cui
2024-03-19 15:42 ` Rich Felker
2024-03-19 15:55 ` Mike Cui
2024-03-19 16:08 ` Rich Felker
2024-03-19 16:39 ` Jₑₙₛ Gustedt
2024-03-19 20:47 ` Thorsten Glaser
2024-03-21 10:58 ` Jₑₙₛ Gustedt
2024-03-21 16:41 ` Thorsten Glaser
2024-03-19 21:04 ` NRK
2024-03-19 21:36 ` Rich Felker
2024-03-20 17:11 ` NRK
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