GNU bug report logs - #64914
[PATCH] * gdb-mi.el: allow disabling the gdb io buffer

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Package: emacs; Severity: wishlist; Reported by: StrawberryTea <look@HIDDEN>; Keywords: moreinfo; merged with #64913; dated Fri, 28 Jul 2023 07:12:03 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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Date: Mon, 17 Feb 2025 14:18:27 +0200
Message-Id: <86ikp8bw8c.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
To: StrawberryTea <look@HIDDEN>
In-Reply-To: <87v7t9nz27.fsf@HIDDEN> (message from StrawberryTea on
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Subject: Re: bug#64914: [PATCH] * gdb-mi.el: allow disabling the gdb io buffer
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> From: StrawberryTea <look@HIDDEN>
> Date: Sun, 16 Feb 2025 20:24:16 -0500
> 
> Eli Zaretskii <eliz@HIDDEN> writes:
> 
> >> From: Stefan Kangas <stefankangas@HIDDEN>
> >> Date: Thu, 13 Feb 2025 02:07:41 -0600
> >> Cc: LemonBreezes <look@HIDDEN>, 64914 <at> debbugs.gnu.org
> >>
> >> Eli Zaretskii <eliz@HIDDEN> writes:
> >>
> >> > But OK, if someone wants to downgrade gdb-mi this way, why not them
> >> > have it.
> >>
> >> I'd actually rather lean towards closing this towards as a wontfix.
> >
> > I don't mind, but maybe the OP does.
> Actually, the patch implementing gdb-display-io-buffer as a configurable
> option was already merged into master a long time ago. It's in Emacs 30.1.

Thanks, closing.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#64914; Package emacs. Full text available.
Removed tag(s) patch. Request was from Stefan Kangas <stefankangas@HIDDEN> to control <at> debbugs.gnu.org. Full text available.
Added tag(s) moreinfo. Request was from Stefan Kangas <stefankangas@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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Subject: Re: bug#64914: [PATCH] * gdb-mi.el: allow disabling the gdb io buffer
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> From: Stefan Kangas <stefankangas@HIDDEN>
> Date: Thu, 13 Feb 2025 02:07:41 -0600
> Cc: LemonBreezes <look@HIDDEN>, 64914 <at> debbugs.gnu.org
> 
> Eli Zaretskii <eliz@HIDDEN> writes:
> 
> > But OK, if someone wants to downgrade gdb-mi this way, why not them
> > have it.
> 
> I'd actually rather lean towards closing this towards as a wontfix.

I don't mind, but maybe the OP does.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#64914; Package emacs. Full text available.

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Subject: Re: bug#64914: [PATCH] * gdb-mi.el: allow disabling the gdb io buffer
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 Content preview:  Eli Zaretskii writes: >> Date: Fri,
 28 Jul 2023 10:54:02 -0400
 >> From: LemonBreezes >> Cc: 64914 <at> debbugs.gnu.org >> >> No,
 setting gdb-display-io-nopopup
 to nil does not prevent the program IO from being split off into [...] 
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Eli Zaretskii <eliz@HIDDEN> writes:

>> Date: Fri, 28 Jul 2023 10:54:02 -0400
>> From: LemonBreezes <look@HIDDEN>
>> Cc: 64914 <at> debbugs.gnu.org
>>
>> No, setting gdb-display-io-nopopup to nil does not prevent the program IO from being split off into the
>> gdb-inferior-io buffer, nor does it prevent the gdb-inferior-io buffer from popping up when debugging is
>> started.
>
> I said set it non-nil, not nil. nil is its default value, under which
> it does pop up the IO buffer.  You want it not to pop up, so you
> should set the variable to t.
>
>> The purpose of setting gdb-display-io-buffer to nil is to prevent the gdb-inferior-io buffer from
>> being created altogether, instead outputting the program output to the GDB buffer itself. A user in the
>> Doom Emacs Discord told me this used to be the behavior of gdb-mi.el but that it was changed
>> without giving the user the option to opt out. I have not investigated that but the comments say that is a
>> feature of GDB 6.4 onward.
>
> If the want the old behavior, why do they use gdb-mi at all? why not
> use "M-x gud-gdb" instead?  That behaves exactly like the old GDB
> interface.

No further updates here within 18 months.

Does that mean that "M-x gud-gdb" is all that is needed to satisfy this
use case?  If not, what is still missing?

> But OK, if someone wants to downgrade gdb-mi this way, why not them
> have it.

I'd actually rather lean towards closing this towards as a wontfix.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#64914; Package emacs. Full text available.
Severity set to 'wishlist' from 'normal' Request was from Stefan Kangas <stefankangas@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: Eli Zaretskii <eliz@HIDDEN>
To: LemonBreezes <look@HIDDEN>
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Subject: Re: bug#64914: [PATCH] * gdb-mi.el: allow disabling the gdb io buffer
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> Date: Fri, 28 Jul 2023 10:54:02 -0400
> From: LemonBreezes <look@HIDDEN>
> Cc: 64914 <at> debbugs.gnu.org
> 
> No, setting gdb-display-io-nopopup to nil does not prevent the program IO from being split off into the
> gdb-inferior-io buffer, nor does it prevent the gdb-inferior-io buffer from popping up when debugging is
> started.

I said set it non-nil, not nil. nil is its default value, under which
it does pop up the IO buffer.  You want it not to pop up, so you
should set the variable to t.

> The purpose of setting gdb-display-io-buffer to nil is to prevent the gdb-inferior-io buffer from
> being created altogether, instead outputting the program output to the GDB buffer itself. A user in the
> Doom Emacs Discord told me this used to be the behavior of gdb-mi.el but that it was changed
> without giving the user the option to opt out. I have not investigated that but the comments say that is a
> feature of GDB 6.4 onward.

If the want the old behavior, why do they use gdb-mi at all? why not
use "M-x gud-gdb" instead?  That behaves exactly like the old GDB
interface.

But OK, if someone wants to downgrade gdb-mi this way, why not them
have it.  So I have a comment to your patch:

> +(defcustom gdb-display-io-buffer t
> +  "When non-nil, display the `gdb-inferior-io' buffer.  Otherwise,
> +send program output to the GDB buffer."
> +  :type 'boolean
> +  :group 'gdb
> +  :version "30.1")

The first line of a doc string should be a single complete sentence.

And please describe the behavior in the doc string better: this is not
about displaying the IO buffer, this is about not separating the
program's I/O from the GDB I/O and not redirecting the program's I/O
to a separate buffer.

And finally, please accompany your patch with a ChangeLog-style commit
log message (see CONTRIBUTE for details, if you need them).

Thanks.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#64914; Package emacs. Full text available.

Message received at 64914 <at> debbugs.gnu.org:


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Date: Fri, 28 Jul 2023 10:54:02 -0400
From: LemonBreezes <look@HIDDEN>
To: "Eli Zaretskii" <eliz@HIDDEN>
Subject: Re: bug#64914: [PATCH] * gdb-mi.el: allow disabling the gdb io buffer
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--1dae4124516f441cb5fd2076ad255e04
Content-Type: text/plain

No, setting gdb-display-io-nopopup to nil does not prevent the program IO from being split off into the gdb-inferior-io buffer, nor does it prevent the gdb-inferior-io buffer from popping up when debugging is started. The purpose of setting gdb-display-io-buffer to nil is to prevent the gdb-inferior-io buffer from being created altogether, instead outputting the program output to the GDB buffer itself. A user in the Doom Emacs Discord told me this used to be the behavior of gdb-mi.el but that it was changed without giving the user the option to opt out. I have not investigated that but the comments say that is a feature of GDB 6.4 onward.

On Fri, Jul 28, 2023, at 7:17 AM, Eli Zaretskii wrote:
> > From: StrawberryTea <look@HIDDEN>
> > Date: Thu, 27 Jul 2023 20:33:39 -0400
> > 
> > This change allows the user to disable the `gdb-inferior-io' buffer.
> > This is useful for users that prefer a more classical gdb experience
> > where you just have the GDB window and the source window.
> 
> Sorry, I don't think I understand why you need a new defcustom.
> Doesn't setting gdb-display-io-nopopup non-nil already achieve what
> you want?  It does here.
> 
> Thanks.
> 

--1dae4124516f441cb5fd2076ad255e04
Content-Type: text/html
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE html><html><head><title></title><style type=3D"text/css">p.Mso=
Normal,p.MsoNoSpacing{margin:0}</style></head><body><div>No, setting gdb=
-display-io-nopopup to nil does not prevent the program IO from being sp=
lit off into the&nbsp;gdb-inferior-io buffer, nor does it prevent the&nb=
sp;gdb-inferior-io buffer from popping up when debugging is started. The=
 purpose of setting&nbsp;gdb-display-io-buffer to nil is to prevent the =
gdb-inferior-io buffer from being created altogether, instead outputting=
 the program output to the GDB buffer itself. A user in the Doom Emacs D=
iscord told me this used to be the behavior of gdb-mi.el but that it was=
 changed without giving the user the option to opt out. I have not inves=
tigated that but the comments say that is a feature of GDB 6.4 onward.</=
div><div><br></div><div>On Fri, Jul 28, 2023, at 7:17 AM, Eli Zaretskii =
wrote:<br></div><blockquote type=3D"cite" id=3D"qt" style=3D""><div>&gt;=
 From: StrawberryTea &lt;<a href=3D"mailto:look@HIDDEN">look@=
strawberrytea.xyz</a>&gt;<br></div><div>&gt; Date: Thu, 27 Jul 2023 20:3=
3:39 -0400<br></div><div>&gt;&nbsp;<br></div><div>&gt; This change allow=
s the user to disable the `gdb-inferior-io' buffer.<br></div><div>&gt; T=
his is useful for users that prefer a more classical gdb experience<br><=
/div><div>&gt; where you just have the GDB window and the source window.=
<br></div><div><br></div><div>Sorry, I don't think I understand why you =
need a new defcustom.<br></div><div>Doesn't setting gdb-display-io-nopop=
up non-nil already achieve what<br></div><div>you want?&nbsp; It does he=
re.<br></div><div><br></div><div>Thanks.<br></div><div><br></div></block=
quote><div><br></div></body></html>
--1dae4124516f441cb5fd2076ad255e04--
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#64914; Package emacs. Full text available.
Merged 64913 64914. Request was from Eli Zaretskii <eliz@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

Message received at 64914 <at> debbugs.gnu.org:


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> From: StrawberryTea <look@HIDDEN>
> Date: Thu, 27 Jul 2023 20:33:39 -0400
> 
> This change allows the user to disable the `gdb-inferior-io' buffer.
> This is useful for users that prefer a more classical gdb experience
> where you just have the GDB window and the source window.

Sorry, I don't think I understand why you need a new defcustom.
Doesn't setting gdb-display-io-nopopup non-nil already achieve what
you want?  It does here.

Thanks.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#64914; Package emacs. Full text available.

Message received at submit <at> debbugs.gnu.org:


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From: StrawberryTea <look@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: [PATCH] * gdb-mi.el: allow disabling the gdb io buffer
Date: Thu, 27 Jul 2023 20:33:39 -0400
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This change allows the user to disable the `gdb-inferior-io' buffer.
This is useful for users that prefer a more classical gdb experience
where you just have the GDB window and the source window.
---
 lisp/progmodes/gdb-mi.el | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/lisp/progmodes/gdb-mi.el b/lisp/progmodes/gdb-mi.el
index a1091de43e9..0d6d7ab02c0 100644
--- a/lisp/progmodes/gdb-mi.el
+++ b/lisp/progmodes/gdb-mi.el
@@ -1098,9 +1098,10 @@ detailed description of this mode.
                      (if gdb-debuginfod-enable "on" "off"))
              'gdb-debuginfod-message)
 
-  (gdb-get-buffer-create 'gdb-inferior-io)
-  (gdb-clear-inferior-io)
-  (gdb-inferior-io--init-proc (get-process "gdb-inferior"))
+  (when gdb-display-io-buffer
+    (gdb-get-buffer-create 'gdb-inferior-io)
+    (gdb-clear-inferior-io)
+    (gdb-inferior-io--init-proc (get-process "gdb-inferior")))
 
   (when (eq system-type 'windows-nt)
     ;; Don't create a separate console window for the debuggee.
@@ -1828,6 +1829,13 @@ this trigger is subscribed to `gdb-buf-publisher' and called with
   :group 'gdb
   :version "25.1")
 
+(defcustom gdb-display-io-buffer t
+  "When non-nil, display the `gdb-inferior-io' buffer.  Otherwise,
+send program output to the GDB buffer."
+  :type 'boolean
+  :group 'gdb
+  :version "30.1")
+
 (defun gdb-inferior-filter (proc string)
   (unless (string-equal string "")
     (let (buf)
-- 
2.41.0
Acknowledgement sent to StrawberryTea <look@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#64914; Package emacs. Full text available.
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