Re: Does anybody know how to debug a live Emacs process?

[Live System User <nyc4bos@aol.com>]

Eli Zaretskii <eliz@gnu.org> writes:
Hi,
>> From: Live System User <nyc4bos@aol.com>
>> Date: Thu, 28 Apr 2016 02:37:17 -0400
>> 
>> I have a live Emacs process that is stuck in a state which only
>> displays:
>> 
>>          Invalid argument #<terminal 2> in ‘get-device-terminal’
>> 
>> in the echo area, including when trying to execute M-x.
>> 
>> I was hoping to solicit assistance to help obtain information to
>> help Emacs and opened Bug#23378 on Monday.
>
> Attach the debugger to the running process, like this:
>
>   gdb -p PID
>
> where PID is the process number of the Emacs process, you should be
> able to see it in the display produced by the 'top' or 'ps' command.
>
> If GDB succeeds in attaching to the process, it will stop it and
> display a "(gdb)" prompt.  Then type at that prompt:
>
>   thread apply all bt full
>
> Then file a bug report with everything that was displayed by GDB.
>
> Some additional information about debugging Emacs is available in the
> file etc/DEBUG that is part of the distribution.

I've added the GDB backtrace info to Bug#23378, as requested.

Thanks.