I use (setq gdb-many-windows t) and (setq gdb-show-main t) configurations in my init.el, so after executing M-x gdb, there will be six windows in the frame, after typing q in the main gdb cli window to finish debugging, how can I quit/delete all the gdb related windows/buffers (including the current gdb CLI, locals, breakpoints, stack frames...) and just leave the source code buffer open at the same time.

1 Answer 1


After googling around and tweaking the code snippets from the internet, I got this solution and it works as expected:

(defvar all-gud-modes
  '(gud-mode comint-mode gdb-locals-mode gdb-frames-mode  gdb-breakpoints-mode)
  "A list of modes when using gdb")
(defun kill-all-gud-buffers ()
  "Kill all gud buffers including Debugger, Locals, Frames, Breakpoints.
Do this after `q` in Debugger buffer."
        (let ((count 0))
          (dolist (buffer (buffer-list))
                (set-buffer buffer)
                (when (member major-mode all-gud-modes)
                  (setq count (1+ count))
                  (kill-buffer buffer)
                  (delete-other-windows))) ;; fix the remaining two windows issue
          (message "Killed %i buffer(s)." count))))

You can bind the kill-all-gud-buffers to a key or defalias it to a short name or even change the function name so you can type it easily.

  • In realgud, the situation is both more complicated and simpler. There can be many debug sessions going on. But the command buffer for a single debug session has a list of the source code buffers associated with it. If you want to write the corresponding function for realgud, you would use field srcbuf-list of the buffer-local variable realgud-cmdbuf-info, I'd consider adding this to the code base.
    – rocky
    Jun 29, 2015 at 16:06

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