GNU bug report logs - #79228
30.1.90; native--compile-async sentinel can error if threads are running

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Message #26 received at 79228 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Spencer Baugh <sbaugh <at> janestreet.com>
Cc: acorallo <at> gnu.org, johnw <at> gnu.org, 79228 <at> debbugs.gnu.org
Subject: Re: bug#79228: 30.1.90; native--compile-async sentinel can error if
 threads are running
Date: Mon, 01 Sep 2025 18:59:39 +0300

> From: Spencer Baugh <sbaugh <at> janestreet.com>
> Cc: acorallo <at> gnu.org,  johnw <at> gnu.org,  79228 <at> debbugs.gnu.org
> Date: Mon, 01 Sep 2025 11:20:58 -0400
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> >> From: Spencer Baugh <sbaugh <at> janestreet.com>
> >> Date: Mon, 1 Sep 2025 08:54:58 -0400
> >> Cc: Eli Zaretskii <eliz <at> gnu.org>, johnw <at> gnu.org, 79228 <at> debbugs.gnu.org
> >> 
> >> On Mon, Sep 1, 2025, 3:52 AM Andrea Corallo <acorallo <at> gnu.org> wrote:
> >> 
> >>  Eli Zaretskii <eliz <at> gnu.org> writes:
> >> 
> >>  Hi Eli,
> >> 
> >>  must say I, like you, still don't understand the issue here.
> >> 
> >>  Spencer which threads are we talking about?  Native async compilation
> >>  spawn processes not threads.
> >> 
> >> Lisp threads - the thread API in Emacs Lisp.
> >
> > Are you talking about some 3rd-party package?  If not, how come
> > threads come into the picture when native-compilation is involved?
> >
> > IOW, would you please describe the situation from its very beginning,
> > assuming someone runs something from "emacs -Q"?  Otherwise, it is
> > very hard to understand what kind of situations could cause async
> > processes running native compilation to be locked to the wrong
> > threads.
> 
> 1. emacs -Q
> 2. Run some command which starts a thread
> 3. Run some command which starts native compilation
> 
> Native compilation is done via pending_funcalls.  pending_funcalls can
> be run in the non-main thread started by 2.

How?

> Thus the native compilation can happen in a non-main thread.

So step 3 is not necessary?

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