GNU bug report logs - #22772
25.0.91; Can't run gud-gdb on two instances of the same program

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Package: emacs;

Reported by: Michael Welsh Duggan <mwd <at> cert.org>

Date: Mon, 22 Feb 2016 17:38:02 UTC

Severity: minor

Found in version 25.0.91

Fixed in version 28.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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Report forwarded to bug-gnu-emacs <at> gnu.org:
bug#22772; Package emacs. (Mon, 22 Feb 2016 17:38:02 GMT) Full text and rfc822 format available.
Acknowledgement sent to Michael Welsh Duggan <mwd <at> cert.org>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs <at> gnu.org. (Mon, 22 Feb 2016 17:38:02 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Michael Welsh Duggan <mwd <at> cert.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.0.91; Can't run gud-gdb on two instances of the same program
Date: Mon, 22 Feb 2016 12:37:20 -0500

I was in a circumstance where I wanted to run a debugger on two
instances of the same program, one compiled with one set of options, and
one compiled with another.  I wanted to compare how they ran in certain
parts of the code.  I use M-x gud-gdb, since the MI client doesn't
support multipl debugger instances (which is sad).

This fails, though, since I get the error:

  gud-common-init: This program is already being debugged

These programs are installed in different directories, but have the same
filename.  I can work around this problem by renaming one of the
executables, but I think this is a bug, since the path to the executable
could be used to determine uniqueness instead of the filename itself.


In GNU Emacs 25.0.91.1 (x86_64-unknown-linux-gnu, X toolkit)
 of 2016-02-16 built on watermonitor.yellow.cert.org
Repository revision: b1a3ebedba88689d26f44cf7db338104b849ae99
Windowing system distributor 'Red Hat, Inc.', version 11.0.11500000
System Description:	Red Hat Enterprise Linux Server release 6.7 (Santiago)

Configured using:
 'configure --without-toolkit-scroll-bars --with-x-toolkit=lucid
 --with-wide-int --prefix=/home/mwd
 PKG_CONFIG_PATH=/home/mwd/lib/pkgconfig:/usr/lib/pkgconfig:/usr/share/pkgconfig'

Configured features:
XPM JPEG TIFF GIF PNG IMAGEMAGICK SOUND GPM DBUS NOTIFY LIBSELINUX
GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB LUCID X11

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
  gnus-topic-mode: t
  gnus-undo-mode: t
  shell-dirtrack-mode: t
  display-time-mode: t
  diff-auto-refine-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  line-number-mode: t

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/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-srvr hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-srvr
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-ml hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-ml
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/nnmh hides /home/mwd/share/emacs/25.0.91/lisp/gnus/nnmh
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/flow-fill hides /home/mwd/share/emacs/25.0.91/lisp/gnus/flow-fill
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/spam-wash hides /home/mwd/share/emacs/25.0.91/lisp/gnus/spam-wash
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/rfc2045 hides /home/mwd/share/emacs/25.0.91/lisp/gnus/rfc2045
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-spec hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-spec
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-mh hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-mh
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/nnagent hides /home/mwd/share/emacs/25.0.91/lisp/gnus/nnagent
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-draft hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-draft
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-uu hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-uu
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-cloud hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-cloud
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-bookmark hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-bookmark
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-win hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-win
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-msg hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-msg
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/mm-url hides /home/mwd/share/emacs/25.0.91/lisp/gnus/mm-url
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/nneething hides /home/mwd/share/emacs/25.0.91/lisp/gnus/nneething
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/html2text hides /home/mwd/share/emacs/25.0.91/lisp/gnus/html2text
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/nnnil hides /home/mwd/share/emacs/25.0.91/lisp/gnus/nnnil
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/mml-sec hides /home/mwd/share/emacs/25.0.91/lisp/gnus/mml-sec
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/compface hides /home/mwd/share/emacs/25.0.91/lisp/gnus/compface
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-eform hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-eform
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-topic hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-topic
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-agent hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-agent
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/nndoc hides /home/mwd/share/emacs/25.0.91/lisp/gnus/nndoc
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-dired hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-dired
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/nnmbox hides /home/mwd/share/emacs/25.0.91/lisp/gnus/nnmbox
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/spam-report hides /home/mwd/share/emacs/25.0.91/lisp/gnus/spam-report
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-vm hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-vm
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-kill hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-kill
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/gnus-cite hides /home/mwd/share/emacs/25.0.91/lisp/gnus/gnus-cite
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/nnweb hides /home/mwd/share/emacs/25.0.91/lisp/gnus/nnweb
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/nnfolder hides /home/mwd/share/emacs/25.0.91/lisp/gnus/nnfolder
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/parse-time hides /home/mwd/share/emacs/25.0.91/lisp/calendar/parse-time
/afs/cert.org/usr/mwd/src/elisp/gnus/lisp/time-date hides /home/mwd/share/emacs/25.0.91/lisp/calendar/time-date

Features:
(shadow flyspell ispell emacsbug flow-fill gnus-dup browse-url sort
gnus-cite mm-archive mail-extr gnus-bcklg qp copyright gnus-async
gnus-ml disp-table gnus-topic utf-7 nndraft nnmh epa-file epa derived
epg network-stream nsm starttls gnus-agent gnus-srvr gnus-score
score-mode nnvirtual gnus-msg gnus-art mm-uu mml2015 mm-view mml-smime
gnus-cache nnir edmacro gnus-sum gnus-demon nntp gnus-group gnus-undo
gnutls gnus-start gnus-cloud nnimap nnmail mail-source tls utf7 netrc
nnoo parse-time gnus-spec gnus-int gnus-range gnus-win gnus-load
yaml-mode woman man tramp tramp-compat tramp-loaddefs trampver
ucs-normalize shell time smime dig server whitespace psvn advice cl
log-edit pcvs-util add-log diff-mode org-clock org org-macro
org-footnote org-pcomplete pcomplete org-list org-faces org-entities
noutline outline easy-mmode org-version ob-emacs-lisp ob ob-tangle
ob-ref ob-lob ob-table ob-exp org-src ob-keys ob-comint comint
ansi-color ring ob-core ob-eval org-compat org-macs org-loaddefs
find-func eudcb-ldap eudc cus-edit cus-start cus-load eudc-vars ldap
message sendmail format-spec rfc822 mml mml-sec mm-decode mm-bodies
mm-encode mail-parse rfc2231 rfc2047 rfc2045 ietf-drums mailabbrev
gmm-utils mailheader gnus gnus-ems gnus-compat url url-proxy url-privacy
url-expand url-methods url-history url-cookie url-domsuf url-util
url-parse auth-source eieio-compat eieio byte-opt bytecomp byte-compile
cl-extra cconv eieio-core cl-macs gv password-cache url-vars mailcap
nnheader gnus-util time-date mail-utils mm-util help-fns help-mode
mail-prsvr wid-edit generic-x generated dired-x dired cc-styles cc-align
cc-engine cc-vars cc-defs cal-china lunar solar cal-dst cal-bahai
cal-islam cal-hebrew holidays hol-loaddefs appt diary-lib diary-loaddefs
cal-menu calendar cal-loaddefs bm info cl-seq kmacro cl-loaddefs pcase
cl-lib finder-inf debbugs-autoloads undo-tree-autoloads package easymenu
epg-config mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel x-win term/common-win x-dnd tool-bar dnd fontset
image regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode
prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
mouse jit-lock font-lock syntax facemenu font-core frame cl-generic cham
georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese charscript case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer cl-preloaded nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote dbusbind inotify dynamic-setting
font-render-setting x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 488026 38328)
 (symbols 48 43173 0)
 (miscs 40 181 439)
 (strings 32 87401 9722)
 (string-bytes 1 2903805)
 (vectors 16 57709)
 (vector-slots 8 951840 22039)
 (floats 8 983 407)
 (intervals 56 578 0)
 (buffers 976 69)
 (heap 1024 54057 33604))

-- 
Michael Welsh Duggan
(mwd <at> cert.org)
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#22772; Package emacs. (Mon, 22 Feb 2016 17:56:01 GMT) Full text and rfc822 format available.

Message #8 received at 22772 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Michael Welsh Duggan <mwd <at> cert.org>
Cc: 22772 <at> debbugs.gnu.org
Subject: Re: bug#22772: 25.0.91;
 Can't run gud-gdb on two instances of the same program
Date: Mon, 22 Feb 2016 19:55:40 +0200

> From: Michael Welsh Duggan <mwd <at> cert.org>
> Date: Mon, 22 Feb 2016 12:37:20 -0500
> 
> I use M-x gud-gdb, since the MI client doesn't support multipl
> debugger instances (which is sad).

What happens if you try debugging several programs at the same time
using the MI client?  I just tried that in Emacs 25.0.91, and it seems
to work for me; in particular, I see 2 instances of GDB running under
Emacs.  So I wonder what doesn't work for you.

Also, latest versions of GDB support debugging multiple programs
inside the same GDB session; not sure if this helps you.

> This fails, though, since I get the error:
> 
>   gud-common-init: This program is already being debugged
> 
> These programs are installed in different directories, but have the same
> filename.  I can work around this problem by renaming one of the
> executables, but I think this is a bug, since the path to the executable
> could be used to determine uniqueness instead of the filename itself.

I think we should avoid developing gud-gdb if gdb-mi.el provides a
reasonable solution for the same use case.  So let's first try to
figure out of "M-x gdb" could work for you, and try fixing it if it
doesn't.

Thanks.
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#22772; Package emacs. (Mon, 22 Feb 2016 18:26:02 GMT) Full text and rfc822 format available.

Message #11 received at 22772 <at> debbugs.gnu.org (full text, mbox):

From: Michael Welsh Duggan <mwd <at> cert.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 22772 <at> debbugs.gnu.org
Subject: Re: bug#22772: 25.0.91;
 Can't run gud-gdb on two instances of the same program
Date: Mon, 22 Feb 2016 13:25:33 -0500

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Michael Welsh Duggan <mwd <at> cert.org>
>> Date: Mon, 22 Feb 2016 12:37:20 -0500
>> 
>> I use M-x gud-gdb, since the MI client doesn't support multipl
>> debugger instances (which is sad).
>
> What happens if you try debugging several programs at the same time
> using the MI client?  I just tried that in Emacs 25.0.91, and it seems
> to work for me; in particular, I see 2 instances of GDB running under
> Emacs.  So I wonder what doesn't work for you.
>
> Also, latest versions of GDB support debugging multiple programs
> inside the same GDB session; not sure if this helps you.

You have a good point.  I haven't tried that in some years.  I will give
the MI version a go.

>> This fails, though, since I get the error:
>> 
>>   gud-common-init: This program is already being debugged
>> 
>> These programs are installed in different directories, but have the same
>> filename.  I can work around this problem by renaming one of the
>> executables, but I think this is a bug, since the path to the executable
>> could be used to determine uniqueness instead of the filename itself.
>
> I think we should avoid developing gud-gdb if gdb-mi.el provides a
> reasonable solution for the same use case.  So let's first try to
> figure out of "M-x gdb" could work for you, and try fixing it if it
> doesn't.

Using M-x gdb on a two binaries in separate directories with the same
name still ends up with:

  gud-common-init: This program is already being debugged

-- 
Michael Welsh Duggan
(mwd <at> cert.org)
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#22772; Package emacs. (Mon, 22 Feb 2016 19:28:02 GMT) Full text and rfc822 format available.

Message #14 received at 22772 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Michael Welsh Duggan <mwd <at> cert.org>
Cc: 22772 <at> debbugs.gnu.org
Subject: Re: bug#22772: 25.0.91;
 Can't run gud-gdb on two instances of the same program
Date: Mon, 22 Feb 2016 21:27:38 +0200

> From: Michael Welsh Duggan <mwd <at> cert.org>
> Cc: <22772 <at> debbugs.gnu.org>
> Date: Mon, 22 Feb 2016 13:25:33 -0500
> 
> Using M-x gdb on a two binaries in separate directories with the same
> name still ends up with:
> 
>   gud-common-init: This program is already being debugged

Thanks, I will look into that.  Meanwhile, rename one of them ;-)
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#22772; Package emacs. (Mon, 22 Feb 2016 19:32:01 GMT) Full text and rfc822 format available.

Message #17 received at 22772 <at> debbugs.gnu.org (full text, mbox):

From: Michael Welsh Duggan <mwd <at> cert.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 22772 <at> debbugs.gnu.org
Subject: Re: bug#22772: 25.0.91;
 Can't run gud-gdb on two instances of the same program
Date: Mon, 22 Feb 2016 14:31:48 -0500

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Michael Welsh Duggan <mwd <at> cert.org>
>> Cc: <22772 <at> debbugs.gnu.org>
>> Date: Mon, 22 Feb 2016 13:25:33 -0500
>> 
>> Using M-x gdb on a two binaries in separate directories with the same
>> name still ends up with:
>> 
>>   gud-common-init: This program is already being debugged
>
> Thanks, I will look into that.  Meanwhile, rename one of them ;-)
>

I have encountered some annoyances using M-x gdb as opposed to M-x
gud-gdb.  I'll try to enumerate some of these in separate bug reports.

-- 
Michael Welsh Duggan
(mwd <at> cert.org)
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#22772; Package emacs. (Fri, 03 Sep 2021 10:45:02 GMT) Full text and rfc822 format available.

Message #20 received at 22772 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Michael Welsh Duggan <mwd <at> cert.org>
Cc: 22772 <at> debbugs.gnu.org
Subject: Re: bug#22772: 25.0.91; Can't run gud-gdb on two instances of the
 same program
Date: Fri, 03 Sep 2021 12:44:37 +0200

Michael Welsh Duggan <mwd <at> cert.org> writes:

> I was in a circumstance where I wanted to run a debugger on two
> instances of the same program, one compiled with one set of options, and
> one compiled with another.  I wanted to compare how they ran in certain
> parts of the code.  I use M-x gud-gdb, since the MI client doesn't
> support multipl debugger instances (which is sad).
>
> This fails, though, since I get the error:
>
>   gud-common-init: This program is already being debugged

This has now been fixed in Emacs 28.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no
bug marked as fixed in version 28.1, send any further explanations to 22772 <at> debbugs.gnu.org and Michael Welsh Duggan <mwd <at> cert.org> Request was from Lars Ingebrigtsen <larsi <at> gnus.org> to control <at> debbugs.gnu.org. (Fri, 03 Sep 2021 10:45:02 GMT) Full text and rfc822 format available.
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Fri, 01 Oct 2021 11:24:08 GMT) Full text and rfc822 format available.
This bug report was last modified 3 years and 267 days ago.

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