From: Eli Zaretskii <eliz@gnu.org>
To: Aaron Jensen <aaronjensen@gmail.com>
Cc: 44313@debbugs.gnu.org
Subject: bug#44313: 27.1.50; ns_mouse_position EXC_BAD_ACCESS crash
Date: Fri, 30 Oct 2020 20:47:31 +0200 [thread overview]
Message-ID: <83imara6v0.fsf@gnu.org> (raw)
In-Reply-To: <CAHyO48xkSFgAxrwO27UHHZEeaDcto0xn-Qo0Tkj9DGUU1hkAMg@mail.gmail.com> (message from Aaron Jensen on Fri, 30 Oct 2020 10:54:56 -0500)
> From: Aaron Jensen <aaronjensen@gmail.com>
> Date: Fri, 30 Oct 2020 10:54:56 -0500
> Cc: 44313@debbugs.gnu.org
>
> On Fri, Oct 30, 2020 at 6:29 AM Eli Zaretskii <eliz@gnu.org> wrote:
> > If f is non-NULL, I don't think it could case EXC_BAD_ACCESS, unless f
> > is garbled and points outside of the process's address space. Which
> > is why we need to see the value of f and whether the address it points
> > to could be accessed.
>
> Looks like it's non-NULL and it can't be accessed.
>
> (lldb) p f
> (frame *) $12 = 0x00000009040f6c5d
> (lldb) p *f
> error: Couldn't apply expression side effects : Couldn't dematerialize
> a result variable: couldn't read its memory
> (lldb) p (f)->output_method
> error: supposed to interpret, but failed: Interpreter couldn't read from memory
That doesn't sound like a frame that is not live, that sounds like a
frame whose memory was freed. Or a frame pointer that is just
garbage.
So the question now is: where did that frame pointer come from?
next prev parent reply other threads:[~2020-10-30 18:47 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-29 20:16 bug#44313: 27.1.50; ns_mouse_position EXC_BAD_ACCESS crash Aaron Jensen
2020-10-30 7:15 ` Eli Zaretskii
2020-10-30 10:16 ` Aaron Jensen
2020-10-30 11:29 ` Eli Zaretskii
2020-10-30 15:54 ` Aaron Jensen
2020-10-30 18:47 ` Eli Zaretskii [this message]
2020-10-30 18:55 ` Aaron Jensen
2020-10-30 19:07 ` Eli Zaretskii
2020-10-30 19:37 ` Aaron Jensen
2020-10-30 20:12 ` Eli Zaretskii
2020-10-30 20:18 ` Aaron Jensen
2020-10-30 22:35 ` Alan Third
2020-11-02 18:11 ` Aaron Jensen
2020-11-06 14:29 ` Aaron Jensen
2020-11-07 16:29 ` Alan Third
2020-11-09 14:43 ` Lars Ingebrigtsen
2020-11-09 14:54 ` Alan Third
2020-12-12 10:43 ` Alan Third
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