From: Eli Zaretskii <eliz@gnu.org>
To: Aaron Jensen <aaronjensen@gmail.com>
Cc: 60220@debbugs.gnu.org
Subject: bug#60220: 29.0.60; macOS 13.1 crash shortly after starting Emacs
Date: Tue, 20 Dec 2022 19:23:00 +0200 [thread overview]
Message-ID: <83r0wuat1n.fsf@gnu.org> (raw)
In-Reply-To: <CAHyO48ziSGb4WEdwZ+OnjAbMq1uar2Z6BEdu-x0Gv+fR7BJiSw@mail.gmail.com> (message from Aaron Jensen on Tue, 20 Dec 2022 10:59:20 -0500)
> From: Aaron Jensen <aaronjensen@gmail.com>
> Date: Tue, 20 Dec 2022 10:59:20 -0500
> Cc: 60220@debbugs.gnu.org
>
> On Tue, Dec 20, 2022 at 10:40 AM Eli Zaretskii <eliz@gnu.org> wrote:
> >
> > AFAIU, it says that Emacs was _loading_ rng-loc. That doesn't mean
> > the problem is in rng-loc's code. The fatal signal comes from the
> > maxOS implementation of dlopen, so I suspect that the way we restart
> > Emacs messes up some OS data structures regarding loaded shared
> > libraries or something.
> >
> > Note that the previous crash you posted also crashes inside dlopen.
> >
> > So I think it's safe to say that restarting Emacs makes loading of
> > *.eln files (and maybe share libraries in general) fragile and tending
> > to crash, for some reason. Maybe we should explicitly unload all the
> > *.eln files when we restart?
>
> Interesting. If I restart while launched from lldb, I get the below.
> It happens right away and it doesn't actually restart. This is not the
> behavior I see if I launch it normally or in xcode. I should note that
> occasionally when I restart Emacs it just quits and does not restart.
> I have to restart it manually. Perhaps this is all connected to the
> issue you're suggesting.
>
> (lldb) process launch
> Process 19414 launched: 'src/emacs' (arm64)
> Process 19414 stopped
> * thread #8, stop reason = exec
> frame #0: 0x0000000100b2c950 dyld`_dyld_start
> dyld`:
> -> 0x100b2c950 <+0>: mov x0, sp
> 0x100b2c954 <+4>: and sp, x0, #0xfffffffffffffff0
> 0x100b2c958 <+8>: mov x29, #0x0
> 0x100b2c95c <+12>: mov x30, #0x0
> Target 0: (emacs) stopped.
> (lldb) thread list
> Process 19414 stopped
> * thread #8: tid = 0x3026c, 0x0000000100b2c950 dyld`_dyld_start, stop
> reason = exec
> (lldb) thread backtrace
> * thread #8, stop reason = exec
> * frame #0: 0x0000000100b2c950 dyld`_dyld_start
> (lldb) continue
> Process 19414 resuming
> Process 19414 exited with status = 14 (0x0000000e) Terminated due to signal 14
What is "signal 14" on macOS?
Anyway, look at the code: we restart by calling execvp. You or
someone who knowns macOS internals should take a look at what that
means for shared libraries which were loaded by the program that calls
execvp -- what happens with those libraries in the execvp'ed process.
I'm guessing that they are not being unloaded and re-loaded by the new
process, or something to that effect.
Or maybe the way we load the *.eln files causes this, triggered by
'execvp'?
Can you try running for a while Emacs built without native compilation
and restarting it? That could tell us whether the *.eln files are the
problem.
next prev parent reply other threads:[~2022-12-20 17:23 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-20 15:11 bug#60220: 29.0.60; macOS 13.1 crash shortly after starting Emacs Aaron Jensen
2022-12-20 15:25 ` Aaron Jensen
2022-12-20 15:41 ` Eli Zaretskii
2022-12-20 15:59 ` Aaron Jensen
2022-12-20 17:23 ` Eli Zaretskii [this message]
2022-12-21 3:47 ` Aaron Jensen
2022-12-21 12:22 ` Eli Zaretskii
2022-12-21 13:29 ` Gerd Möllmann
2022-12-22 5:09 ` Aaron Jensen
2022-12-22 5:12 ` Aaron Jensen
2022-12-22 5:36 ` Gerd Möllmann
2022-12-22 8:18 ` Eli Zaretskii
2022-12-23 2:05 ` Paul Eggert
2022-12-23 2:22 ` Aaron Jensen
2022-12-23 5:33 ` Gerd Möllmann
2022-12-23 5:56 ` Paul Eggert
2022-12-24 6:45 ` Aaron Jensen
2022-12-24 6:57 ` Eli Zaretskii
2022-12-24 7:03 ` Aaron Jensen
2022-12-24 8:25 ` Paul Eggert
2022-12-24 15:11 ` Aaron Jensen
2022-12-25 5:30 ` Gerd Möllmann
2022-12-25 19:30 ` Aaron Jensen
2022-12-25 19:59 ` Eli Zaretskii
2022-12-27 11:12 ` Aaron Jensen
2022-12-27 13:11 ` Eli Zaretskii
2022-12-29 22:47 ` Aaron Jensen
2022-12-29 23:46 ` Aaron Jensen
2022-12-29 23:49 ` Paul Eggert
2022-12-29 23:59 ` Aaron Jensen
2022-12-30 0:03 ` Aaron Jensen
2022-12-30 1:16 ` Paul Eggert
2022-12-30 1:20 ` Aaron Jensen
2022-12-30 2:11 ` Aaron Jensen
2022-12-30 3:54 ` Aaron Jensen
2022-12-30 4:24 ` Aaron Jensen
2022-12-30 4:25 ` Aaron Jensen
2022-12-30 7:41 ` Gerd Möllmann
2022-12-30 8:03 ` Aaron Jensen
2022-12-30 8:42 ` Gerd Möllmann
2022-12-30 13:37 ` Aaron Jensen
2022-12-30 13:52 ` Aaron Jensen
2022-12-30 14:24 ` Aaron Jensen
2022-12-30 15:27 ` Gerd Möllmann
2022-12-30 15:50 ` Aaron Jensen
2022-12-30 8:37 ` Eli Zaretskii
2022-12-30 13:36 ` Aaron Jensen
2022-12-30 14:18 ` Eli Zaretskii
2022-12-30 22:42 ` Paul Eggert
2022-12-31 6:33 ` Eli Zaretskii
2022-12-30 8:32 ` Eli Zaretskii
2023-01-04 15:51 ` Andrea Corallo
2023-01-04 16:58 ` Eli Zaretskii
2023-01-10 15:28 ` Andrea Corallo
2023-01-10 16:57 ` Eli Zaretskii
2023-01-10 22:59 ` Aaron Jensen
2023-01-12 11:01 ` Andrea Corallo
2023-01-14 16:23 ` Aaron Jensen
2022-12-30 0:08 ` Paul Eggert
2022-12-30 8:29 ` Eli Zaretskii
2022-12-22 8:05 ` Eli Zaretskii
2022-12-20 15:32 ` Eli Zaretskii
2022-12-20 15:36 ` Aaron Jensen
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