bug#63084: 30.0.50; gud: set breakpoint while program is running

[TatriX]

Oh, sorry. I tried on a different machine, and realized one have to use "run&".

So, here's what I did:

$ cat main.c

    #include <stdio.h>
    #include <unistd.h>

    int main(void) {
        for (int i = 0; ; i++) {
            printf("%d\n", i);
            sleep(1);
        }
    }

$ gcc -g -o break main.c

$ emacs -Q main.c

M-x gdb RET

# in *gud-break*, NOTE it's "run&"

(gdb) run&

# in main.c

(goto-line 6)

(gud-break 1) ; or C-x C-a C-b

# nothing happens

M-: (gud-call "break 6") RET

# breakpoint is set and process execution is paused on hitting that breakpoint

Hope that's more clear now!

On Wed, Apr 26, 2023 at 8:10 AM Eli Zaretskii <eliz@gnu.org> wrote:

> From: tatrics@gmail.com
> Date: Tue, 25 Apr 2023 21:18:52 +0200
>
> When I try to set a breakpoint with
>     "C-x C-a C-b" or (gud-break 1)
> it doesn't seem to work.

I cannot reproduce this: "C-x C-a C-b" does work for me.  Please
describe the recipe for reproducing the problem completely, starting
from "emacs -Q" and including all the commands you need to type/invoke
to reproduce the issue.

Thanks.