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From: "mikaela.szekely at qyriad dot me" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/28874] arm-none-eabi: internal-error: thread_info*
 inferior_thread(): Assertion `current_thread_ != nullptr' failed
Date: Sun, 27 Mar 2022 16:16:01 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28874

Mikaela Szekely <mikaela.szekely at qyriad dot me> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mikaela.szekely at qyriad =
dot me

--- Comment #14 from Mikaela Szekely <mikaela.szekely at qyriad dot me> ---
Created attachment 14040
  --> https://sourceware.org/bugzilla/attachment.cgi?id=3D14040&action=3Ded=
it
added has_inferior_thread() and checks it in remote_add_thread()

> Whilst it is a bit of the hack for
> the silent_p flag, looking at the 11.1 diff, that flag was added solely f=
or
> non-threaded targets like the BMP.

I don't fully understand the thread methods here either, but
`extended_remote_target::attach()` calls `switch_to_inferior_no_thread()`
before calling `remote_add_thread()` for any target where
`target_is_non_stop_p() =3D=3D false`, with no `switch_to_thread()` in-betw=
een, so
I think this bug might affect more than just non-threaded targets?

I would be interested to know if any other targets are experiencing this bu=
g,
but either way if you'd like a less hacky and possibly more general-case
solution for this, then that might just be to check in `remote_add_thread()=
` if
there is a current thread or not, and switch if not, as in this patch? This
patch does create more diff-noise, though; I'm not sure which is preferable=
 for
gdb.

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