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Re: Debugging M-x gdb
From:
Eli Zaretskii
Subject:
Re: Debugging M-x gdb
Date:
2023年3月31日 17:28:02 +0300
> From: Manuel Giraud <manuel@ledu-giraud.fr>
> Cc: emacs-devel@gnu.org
> Date: 2023年3月31日 15:58:38 +0200
>
> * From a xterm:
> egdb ~/bin/emacs-debug
> (gdb) source ~/emacs-repo/src/.gdbinit
> (gdb) set args -Q
> (gdb) run
>
> * Into this Emacs:
>
> M-x gdb
> Run gdb (like this): egdb -i=mi /usr/X11R6/bin/xclock
> Enable querying debuginfod servers for this session? (y or n) n
> M-x gdb-many-windows
>
> * Into this Emacs *gud-xclock* buffer:
> (gdb) run # then from another terminal: pkill xclock
> [Inferior 1 (process 76899) exited with code 01]
>
> Now Emacs starts spinning the CPU.
>
> * Into the first xterm with GDB:
>
> (gdb) thread apply all bt
>
> ... nothing (even after quitting the Emacs *gud-xclock* buffer and
> that the CPU goes back to normal).
You didn't attach GDB to Emacs. Instead, you started Emacs under GDB.
You should do it like this:
* From exterm:
$ ~/bin/emacs-debug &
* From Emacs:
M-x gdb
Run gdb (like this): egdb -i=mi /usr/X11R6/bin/xclock
Enable querying debuginfod servers for this session? (y or n) n
M-x gdb-many-windows
* Into this Emacs *gud-xclock* buffer:
(gdb) run # then from another terminal: pkill xclock
[Inferior 1 (process 76899) exited with code 01]
Now Emacs starts spinning the CPU.
* Into the first xterm:
$ egdb -p PID
where PID is the process ID of the Emacs process that spins the CPU.
Then at the prompt of this GDB:
(gdb) thread apply all bt