From: James Y Knight <jyknight@google.com>
To: musl@lists.openwall.com
Subject: Re: [musl] Illegal killlock skipping when transitioning to single-threaded state
Date: Tue, 4 Oct 2022 12:24:14 -0400 [thread overview]
Message-ID: <CAA2zVHrR69WzP-ZTEFwSe_Fke8MR_hJCrx2Nm==s+EW+gF3PtA@mail.gmail.com> (raw)
In-Reply-To: <20221004141242.GL29905@brightrain.aerifal.cx>
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On Tue, Oct 4, 2022 at 10:13 AM Rich Felker <dalias@libc.org> wrote:
> If this is actually the case, it's disturbing that GCC does not seem
> to be getting it right either...
>
The __sync_* builtins are legacy and were never particularly well-defined
-- especially for non-x86 platforms. (Note that they don't include atomic
load/store operations, which are effectively unnecessary on x86, but vital
on most other architectures).
I would suggest that musl (and anyone else) really ought to migrate from
its homegrown atomics support to the standard C11 atomic memory model,
which _is_ well-defined and extensively studied. Such a migration will
certainly be a Project, of course...
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next prev parent reply other threads:[~2022-10-04 16:24 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-07 0:46 Alexey Izbyshev
2022-09-19 15:29 ` Rich Felker
2022-10-03 6:16 ` Alexey Izbyshev
2022-10-03 12:33 ` Rich Felker
2022-10-03 13:26 ` Szabolcs Nagy
2022-10-03 21:27 ` Szabolcs Nagy
2022-10-03 22:54 ` Rich Felker
2022-10-03 23:05 ` Rich Felker
2022-10-04 13:50 ` Alexey Izbyshev
2022-10-04 14:12 ` Rich Felker
2022-10-04 14:19 ` Rich Felker
2022-10-04 15:43 ` Alexey Izbyshev
2022-10-04 15:57 ` Rich Felker
2022-10-04 18:15 ` Alexey Izbyshev
2022-10-04 23:21 ` Rich Felker
2022-10-04 16:24 ` James Y Knight [this message]
2022-10-04 16:45 ` Rich Felker
2022-10-05 13:52 ` James Y Knight
2022-10-04 16:01 ` Alexey Izbyshev
2022-10-04 2:58 ` Rich Felker
2022-10-04 3:00 ` Rich Felker
2022-10-04 4:59 ` Rich Felker
2022-10-04 8:16 ` Szabolcs Nagy
2022-10-04 10:18 ` Alexey Izbyshev
2022-10-04 5:16 ` Alexey Izbyshev
2022-10-04 8:31 ` Szabolcs Nagy
2022-10-04 10:28 ` Alexey Izbyshev
2022-10-05 1:00 ` Rich Felker
2022-10-05 12:10 ` Alexey Izbyshev
2022-10-05 14:03 ` Rich Felker
2022-10-05 14:37 ` Rich Felker
2022-10-05 16:23 ` Alexey Izbyshev
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