daimrod@gmail.com (Grégoire Jadi) writes:

> `gdb-io-stop' fails to stop the program being debugged when using the
> GDB/MI interface (M-x gdb run gdb -i=mi). C-c C-z also fails to stop the
> program. However, no error is reported, it fails silently, without doing
> anything.
>
> Recipe:
>
> emacs -Q
> M-x cd RET path/to/emacs-sources/src RET
> M-x gdb RET (edit the minibuffer to use "gdb -i=mi ./emacs") RET
> gdb> run -Q
> [emacs starts]
> Now try C-c C-z in *gud-emacs* or M-x gdb-io-stop RET
>
> This bug is only present when using the GDB/MI interpreter. It doesn't
> happen using just the GUD interaction buffer interface (with M-x gud-gdb
> RET), C-c C-z and `gdb-io-stop' can be used to stop the program being
> debugged in *gud-emacs*.

Here a workaround, it sends a raw string with "C-z" instead of a signal.
There is probably a nicer solution but I don't know `gdb-mi.el' and the
GDB/MI interface enough.

With this, C-c C-z can be used in the gdb-inferior-io buffer to stop the
program being debugged.