bug#10580: 24.0.92; gdb initialization takes more than one minute at 100% CPU

[Dov Grobgeld]

Thank you very much for looking into this. For me, this is currently, the main show stopper for starting to emacs-24.

I have just tested the same scenario with the latest git HEAD version from http://git.savannah.gnu.org/r/emacs.git/ :

823d681 Optionally include holidays in cal-html output

and unfortunately the exact same behavior as before still remains.

Please let me know if there are any tests or debug info that I can provide you with that can help in resolving this issue. I tried debugging it myself, but I found it to complex since I lack the knowledge of how sub-processes are handled in emacs.

Regards,
Dov

On Sun, May 6, 2012 at 7:13 AM, Chong Yidong <cyd@gnu.org> wrote:

Dov Grobgeld <dov.grobgeld@gmail.com> writes:

> Here is some more clarification. In keyboard.c:command_loop_1() the
> line i=read_key_sequence() blocks during interactive work until a key
> is pressed. But when the process is stuck in "gdb" read_key_sequence()
> does not block but keeps returning. I still have no clue of what goes
> on though.

Is this still with 24.0.92, or the latest pretest 24.0.96, or the
emacs-24 branch?  I made some changes to the pty handling a few weeks
ago (which should be included in 24.0.96), which may impact this issue.