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Re: Debugging M-x gdb
From: |
Manuel Giraud |
Subject: |
Re: Debugging M-x gdb |
Date: |
Fri, 31 Mar 2023 10:09:39 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) |
Eli Zaretskii <eliz@gnu.org> writes:
>> Date: Sun, 26 Mar 2023 20:09:31 +0200
>> From: Manuel Giraud via "Emacs development discussions."
>> <emacs-devel@gnu.org>
>> I don't know if I should file a bug report for this so I'm trying here.
>>
>> Whenever I try to debug Emacs with M-x gdb, I see the following
>> behaviour. In the *gud-emacs* buffer, I enter "set args -Q" and then
>> "run"... then I exit the debugged Emacs and now the Emacs from where I
>> called (gdb) starts taking a full CPU. I had to enter "quit" into the
>> *gud-emacs* buffer to stop this (return to normal CPU usage).
>>
>> I'd really like to debug this issue but don't really where to start. I
>> have tried to profile-start/profile-report but I don't get much clue out
>> of it. How could I proceed?
>
> Are you sure it's Emacs that consumes high CPU, and not GDB? what does
> 'top' or similar command says about which process consumes CPU?
Hi Eli,
I finally had time to test this. So yes, it is the emacs process (I
looked with M-x proced) that takes up to 95% of one CPU.
> If it's indeed Emacs, then when Emacs starts consuming high CPU,
> attach GDB to it, then type this:
>
> (gdb) source /path/to/emacs/src/.gdbinit
> (gdb) thread apply all bt
I've tried this recipe (all Emacs with -Q) but "thread apply all bt"
does not produce any output.
> and post everything this produces with a bug report sent via
> report-emacs-bug.
>
> Thanks.
>
> P.S. In which Emacs version does that happen, and with which version
> of GDB?
I've just tested it with a the main branch head for Emacs and GDB is
version 9.2.
Thanks.
--
Manuel Giraud
- Debugging M-x gdb, Manuel Giraud, 2023/03/26
- Re: Debugging M-x gdb, Eli Zaretskii, 2023/03/26
- Re: Debugging M-x gdb,
Manuel Giraud <=
- Re: Debugging M-x gdb, Eli Zaretskii, 2023/03/31
- Re: Debugging M-x gdb, Manuel Giraud, 2023/03/31
- Re: Debugging M-x gdb, Eli Zaretskii, 2023/03/31
- Re: Debugging M-x gdb, Manuel Giraud, 2023/03/31
- Re: Debugging M-x gdb, Eli Zaretskii, 2023/03/31