GNU bug report logs - #29332
27.0.50; running under gdb

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

From: Richard Stallman <rms <at> gnu.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.0.50; running under gdb
Date: Thu, 16 Nov 2017 22:17:55 -0500

I cd to src and type

   gdb emacs

   r

and I get the error message

   there is no member named name

I am using GDB version 7.7.1 which is in Trisquel 7.
In principle I could install the latest GDB, but it would be a lot of work
and I doubt it would make a difference.  I think the bug is in src/.gdbinit.

  


In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 2.24.23)
 of 2017-11-15 built on freetop
Repository revision: 52d822f31bc7cb57694c1e209b2d02e5efb8f48c
System Description:	Trisquel GNU/Linux 7.0, Belenos

Recent messages:
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For information about GNU Emacs and the GNU system, type C-h C-a.
Note: file is write protected [4 times]
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~/emacs-git/build-nov-15/src 

Configured using:
 'configure 'CFLAGS=-O0 -g' --with-gnutls=no'

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND GPM DBUS GSETTINGS NOTIFY LIBXML2
FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK2 X11

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

Major mode: RMAIL

Minor modes in effect:
  shell-dirtrack-mode: t
  gpm-mouse-mode: t
  tooltip-mode: t
  global-eldoc-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
  transient-mark-mode: t
  abbrev-mode: t

Load-path shadows:
None found.

Features:
(shadow emacsbug mailalias pcmpl-unix shell pcomplete comint
ansi-color ring rmailmm message sendmail rmc puny format-spec rfc822
mml mml-sec epa epg gnus-util mm-decode mm-bodies mm-encode mailabbrev
gmm-utils mailheader mail-parse rfc2231 rmail rmail-loaddefs rfc2047
rfc2045 ietf-drums mm-util mail-prsvr mail-utils dired dired-loaddefs
t-mouse term/linux elec-pair view derived time-date paren cus-start
cus-load advice finder-inf package easymenu epg-config url-handlers
url-parse auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs
password-cache url-vars seq byte-opt gv bytecomp byte-compile cconv
cl-loaddefs cl-lib tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar
dnd fontset image regexp-opt fringe tabulated-list replace newcomment
text-mode elisp-mode lisp-mode prog-mode register page menu-bar
rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core term/tty-colors 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 composite charscript
charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray
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 system-font-setting
font-render-setting move-toolbar gtk x-toolkit x multi-tty
make-network-process emacs)

Memory information:
((conses 16 241663 17158)
 (symbols 48 22882 2)
 (miscs 40 1971 1937)
 (strings 32 36389 2268)
 (string-bytes 1 980507)
 (vectors 16 15625)
 (vector-slots 8 491132 19474)
 (floats 8 66 295)
 (intervals 56 56888 41)
 (buffers 992 32)
 (heap 1024 17980 1513))
[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]


-- 
Dr Richard Stallman
President, Free Software Foundation (https://gnu.org, https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)
Skype: No way! See https://stallman.org/skype.html.

Message #10 received at 29332-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: rms <at> gnu.org
Cc: 29332-done <at> debbugs.gnu.org
Subject: Re: bug#29332: 27.0.50; running under gdb
Date: Fri, 17 Nov 2017 12:10:04 +0200

> From: Richard Stallman <rms <at> gnu.org>
> Date: Thu, 16 Nov 2017 22:17:55 -0500
> 
> I cd to src and type
> 
>    gdb emacs
> 
>    r
> 
> and I get the error message
> 
>    there is no member named name
> 
> I am using GDB version 7.7.1 which is in Trisquel 7.
> In principle I could install the latest GDB, but it would be a lot of work
> and I doubt it would make a difference.  I think the bug is in src/.gdbinit.

You are right.  Fixed on the release branch with the changes below.

commit 42c8768134dcfaaf08637e36fe478605c1957517
Author:     Eli Zaretskii <eliz <at> gnu.org>
AuthorDate: Fri Nov 17 12:08:06 2017 +0200
Commit:     Eli Zaretskii <eliz <at> gnu.org>
CommitDate: Fri Nov 17 12:08:06 2017 +0200

    Fix .gdbinit following lisp.h changes
    
    * src/.gdbinit (xsymname, pwinx, pgx, xbuffer, xcar, xcdr, xlist)
    (xprintstr): Adapt to latest changes in Lisp object C structures.
    (Bug#29332)

diff --git a/src/.gdbinit b/src/.gdbinit
index 60f6348..48bb5df 100644
--- a/src/.gdbinit
+++ b/src/.gdbinit
@@ -78,7 +78,7 @@ end
 # Access the name of a symbol
 define xsymname
   xgetsym $arg0
-  set $symname = $ptr->name
+  set $symname = $ptr->u.s.name
 end
 
 # Set up something to print out s-expressions.
@@ -376,7 +376,7 @@ define pwinx
   xgetptr $w->buffer
   set $tem = (struct buffer *) $ptr
   xgetptr $tem->name_
-  printf "%s", ((struct Lisp_String *) $ptr)->data
+  printf "%s", ((struct Lisp_String *) $ptr)->u.s.data
   printf "\n"
   xgetptr $w->start
   set $tem = (struct Lisp_Marker *) $ptr
@@ -504,7 +504,7 @@ define pgx
   xgettype ($g.object)
   if ($type == Lisp_String)
     xgetptr $g.object
-    printf " str=0x%x[%d]", ((struct Lisp_String *)$ptr)->data, $g.charpos
+    printf " str=0x%x[%d]", ((struct Lisp_String *)$ptr)->u.s.data, $g.charpos
   else
     printf " pos=%d", $g.charpos
   end
@@ -896,7 +896,7 @@ define xbuffer
   xgetptr $
   print (struct buffer *) $ptr
   xgetptr $->name_
-  output ((struct Lisp_String *) $ptr)->data
+  output ((struct Lisp_String *) $ptr)->u.s.data
   echo \n
 end
 document xbuffer
@@ -935,7 +935,7 @@ end
 define xcar
   xgetptr $
   xgettype $
-  print/x ($type == Lisp_Cons ? ((struct Lisp_Cons *) $ptr)->car : 0)
+  print/x ($type == Lisp_Cons ? ((struct Lisp_Cons *) $ptr)->u.s.car : 0)
 end
 document xcar
 Assume that $ is an Emacs Lisp pair and print its car.
@@ -944,7 +944,7 @@ end
 define xcdr
   xgetptr $
   xgettype $
-  print/x ($type == Lisp_Cons ? ((struct Lisp_Cons *) $ptr)->u.cdr : 0)
+  print/x ($type == Lisp_Cons ? ((struct Lisp_Cons *) $ptr)->u.s.u.cdr : 0)
 end
 document xcdr
 Assume that $ is an Emacs Lisp pair and print its cdr.
@@ -957,9 +957,9 @@ define xlist
   set $nil = $ptr
   set $i = 0
   while $cons != $nil && $i < 10
-    p/x $cons->car
+    p/x $cons->u.s.car
     xpr
-    xgetptr $cons->u.cdr
+    xgetptr $cons->u.s.u.cdr
     set $cons = (struct Lisp_Cons *) $ptr
     set $i = $i + 1
     printf "---\n"
@@ -1072,13 +1072,13 @@ Print $ as a lisp object of any type.
 end
 
 define xprintstr
-  set $data = (char *) $arg0->data
-  set $strsize = ($arg0->size_byte < 0) ? ($arg0->size & ~ARRAY_MARK_FLAG) : $arg0->size_byte
+  set $data = (char *) $arg0->u.s.data
+  set $strsize = ($arg0->u.s.size_byte < 0) ? ($arg0->u.s.size & ~ARRAY_MARK_FLAG) : $arg0->u.s.size_byte
   # GDB doesn't like zero repetition counts
   if $strsize == 0
     output ""
   else
-    output ($arg0->size > 1000) ? 0 : ($data[0])@($strsize)
+    output ($arg0->u.s.size > 1000) ? 0 : ($data[0])@($strsize)
   end
 end
 
@@ -1255,7 +1255,7 @@ commands
   xsymname globals.f_Vinitial_window_system
   xgetptr $symname
   set $tem = (struct Lisp_String *) $ptr
-  set $tem = (char *) $tem->data
+  set $tem = (char *) $tem->u.s.data
   # If we are running in synchronous mode, we want a chance to look
   # around before Emacs exits.  Perhaps we should put the break
   # somewhere else instead...

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