From unknown Mon Aug 18 09:06:37 2025 X-Loop: help-debbugs@gnu.org Subject: bug#21438: 25.0.50; GUD locals frame/window doesn't shows struct values as nil Resent-From: Tassilo Horn Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 09 Sep 2015 06:06:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 21438 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: 21438@debbugs.gnu.org X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Received: via spool by submit@debbugs.gnu.org id=B.144177872431567 (code B ref -1); Wed, 09 Sep 2015 06:06:01 +0000 Received: (at submit) by debbugs.gnu.org; 9 Sep 2015 06:05:24 +0000 Received: from localhost ([127.0.0.1]:53223 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZZYVW-0008D3-TR for submit@debbugs.gnu.org; Wed, 09 Sep 2015 02:05:24 -0400 Received: from eggs.gnu.org ([208.118.235.92]:59375) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZZYVT-0008Ct-23 for submit@debbugs.gnu.org; Wed, 09 Sep 2015 02:05:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZZYVO-0008Qr-UP for submit@debbugs.gnu.org; Wed, 09 Sep 2015 02:05:18 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50,T_DKIM_INVALID, T_RP_MATCHES_RCVD autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:35220) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZZYVO-0008Qk-Rm for submit@debbugs.gnu.org; Wed, 09 Sep 2015 02:05:14 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41077) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZZYVH-0000VI-QR for bug-gnu-emacs@gnu.org; Wed, 09 Sep 2015 02:05:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZZYVD-0008Du-M2 for bug-gnu-emacs@gnu.org; Wed, 09 Sep 2015 02:05:07 -0400 Received: from out4-smtp.messagingengine.com ([66.111.4.28]:55560) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZZYVD-0008D5-Ia for bug-gnu-emacs@gnu.org; Wed, 09 Sep 2015 02:05:03 -0400 Received: from compute2.internal (compute2.nyi.internal [10.202.2.42]) by mailout.nyi.internal (Postfix) with ESMTP id 72E7520C0C for ; Wed, 9 Sep 2015 02:05:00 -0400 (EDT) Received: from frontend2 ([10.202.2.161]) by compute2.internal (MEProxy); Wed, 09 Sep 2015 02:05:00 -0400 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d= messagingengine.com; h=content-type:date:from:message-id :mime-version:subject:to:x-sasl-enc:x-sasl-enc; s=smtpout; bh=yf AsrEG9est16TEZ3ssLLefBq3I=; b=uOEHGEoTQCa85Mt1buIrfmUFZ/Obve/QgQ nyubtCl/JZ/GcZh7IRWOgQzgHxayo77CFy9z3qwM9ETykzcODQnsBVogpCA2V6tK ELftIRlrzR+FG9bljBTime5yev9AABgOZyIjeXdCmaepb4uQQUljJBuZAzb6p0mr 4jRuSQXho= X-Sasl-enc: dR+yxXgCPNS3S5dAyuRgR/X5BfRLcMJWsDL8bBRVI/vY 1441778699 Received: from thinkpad-t440p (unknown [2.161.206.107]) by mail.messagingengine.com (Postfix) with ESMTPA id 970C068016A for ; Wed, 9 Sep 2015 02:04:59 -0400 (EDT) From: Tassilo Horn Date: Wed, 09 Sep 2015 08:04:49 +0200 Message-ID: <877fo0cem6.fsf@gnu.org> MIME-Version: 1.0 Content-Type: text/plain X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -5.0 (-----) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -5.0 (-----) When debugging C code with M-x gdb and enabling the locals window or frame, the values of structs (just structs, no struct pointers) are always displayed as nil. For example, when debugging in xdisp.c --8<---------------cut here---------------start------------->8--- DEFUN ("line-pixel-height", Fline_pixel_height, Sline_pixel_height, 0, 0, 0, doc: /* Return height in pixels of text line in the selected window. Value is the height in pixels of the line at point. */) (void) { struct it it; struct text_pos pt; struct window *w = XWINDOW (selected_window); struct buffer *old_buffer = NULL; Lisp_Object result; ... } --8<---------------cut here---------------end--------------->8--- and stepping till the end of the function, this is the contents of the locals buffer shows: --8<---------------cut here---------------start------------->8--- struct it it nil struct text_pos pt nil struct window * w 0x12a1d40 struct buffer * old_buffer 0x0 Lisp_Object result 58 --8<---------------cut here---------------end--------------->8--- But it and pt cannot be NULL/nil (and they are not when checking with "info locals" in the GUD GDB buffer). The reason for that is that GUD uses the GDB command "-stack-list-locals --thread X --simple-values" as defined in gdb-mi.el:3991 which returns: locals=[{name="it",type="struct it"}, {name="pt",type="struct text_pos"}, {name="w",type="struct window *",value="0x12a1d40"}, {name="old_buffer",type="struct buffer *",value="0x0"}, {name="result",type="Lisp_Object",value="58"}] Note that the entries for the two structs it and pt don't have a value field. I guess the usage of --simple-values is intentional, and in fact, when trying to use "--all-values" instead I get a error in process filter: gdb-jsonify-buffer: Stack overflow in regexp matcher I'm not actually sure if it would be benefitical to use --all-values even if that regexp matching error was fixed because the structs can be really large. But at least the value should not be shown as "nil" but as "" or something else which makes it obvious that the displayed value is not the real value. In GNU Emacs 25.0.50.15 (x86_64-unknown-linux-gnu, GTK+ Version 3.16.6) of 2015-09-09 Repository revision: 39dca94701de81d02c75316e32d67e3677bd685d Windowing system distributor 'The X.Org Foundation', version 11.0.11702000 System Description: Arch Linux Configured using: 'configure 'CFLAGS=-g -ggdb3 -O0'' Configured features: XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS NOTIFY ACL GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 Important settings: value of $LC_MONETARY: de_DE.utf8 value of $LC_NUMERIC: de_DE.utf8 value of $LC_TIME: de_DE.utf8 value of $LANG: en_US.utf8 locale-coding-system: utf-8-unix Major mode: Debugger Minor modes in effect: diff-auto-refine-mode: t global-company-mode: t shell-dirtrack-mode: t global-aggressive-indent-mode: t pdf-occur-global-minor-mode: t recentf-mode: t global-subword-mode: t subword-mode: t save-place-mode: t savehist-mode: t show-paren-mode: t ivy-mode: t minibuffer-depth-indicate-mode: t electric-pair-mode: t tooltip-mode: t global-eldoc-mode: t electric-indent-mode: t mouse-wheel-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t column-number-mode: t line-number-mode: t transient-mark-mode: t Recent messages: Type C-x 1 to delete the help window. mouse-2, RET: find function's definition Unable to find location in file Entering debugger... 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pdf-occur ibuf-ext ibuffer tablist tablist-filter semantic/wisent/comp semantic/wisent semantic/wisent/wisent semantic/util-modes semantic/util semantic semantic/tag semantic/lex semantic/fw eieio byte-opt bytecomp byte-compile cconv eieio-core mode-local find-func cedet dired pdf-isearch let-alist pdf-misc imenu pdf-tools compile comint ansi-color cus-edit cus-start cus-load pdf-view bookmark pp jka-compr pdf-cache pdf-info tq pdf-util format-spec image-mode browse-kill-ring derived recentf tree-widget wid-edit highlight-parentheses cl iedit iedit-lib cl-extra help-mode hydra lv counsel swiper cap-words superword subword saveplace savehist paren ivy delsel icomplete mb-depth ace-window easy-mmode cl-macs gv avy ring smart-mode-line-respectful-theme smart-mode-line-light-theme cl-seq smart-mode-line rich-minority rx bs elec-pair edmacro kmacro cl-loaddefs cl-lib gnus-load subr-x pcase tsdh-light-theme finder-inf memory-usage-autoloads advice info package easymenu epg-config time-date 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 system-font-setting font-render-setting move-toolbar gtk x-toolkit x multi-tty make-network-process emacs) Memory information: ((conses 16 811381 90006) (symbols 48 52202 16) (miscs 40 596 637) (strings 32 121930 8084) (string-bytes 1 4091076) (vectors 16 51794) (vector-slots 8 1020916 58214) (floats 8 825 788) (intervals 56 86068 3496) (buffers 976 25) (heap 1024 65057 3076)) From unknown Mon Aug 18 09:06:37 2025 X-Loop: help-debbugs@gnu.org Subject: bug#21438: 25.0.50; GUD locals frame/window doesn't shows struct values as nil Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 09 Sep 2015 14:15:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 21438 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Tassilo Horn Cc: 21438@debbugs.gnu.org Reply-To: Eli Zaretskii Received: via spool by 21438-submit@debbugs.gnu.org id=B21438.144180807216588 (code B ref 21438); Wed, 09 Sep 2015 14:15:02 +0000 Received: (at 21438) by debbugs.gnu.org; 9 Sep 2015 14:14:32 +0000 Received: from localhost ([127.0.0.1]:53855 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZZg8u-0004JU-26 for submit@debbugs.gnu.org; Wed, 09 Sep 2015 10:14:32 -0400 Received: from mtaout20.012.net.il ([80.179.55.166]:40422) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZZg8r-0004JL-BS for 21438@debbugs.gnu.org; Wed, 09 Sep 2015 10:14:30 -0400 Received: from conversion-daemon.a-mtaout20.012.net.il by a-mtaout20.012.net.il (HyperSendmail v2007.08) id <0NUE00A00Y39YJ00@a-mtaout20.012.net.il> for 21438@debbugs.gnu.org; Wed, 09 Sep 2015 17:14:28 +0300 (IDT) Received: from HOME-C4E4A596F7 ([84.94.185.246]) by a-mtaout20.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NUE00ALQY83MA70@a-mtaout20.012.net.il>; Wed, 09 Sep 2015 17:14:28 +0300 (IDT) Date: Wed, 09 Sep 2015 17:14:24 +0300 From: Eli Zaretskii In-reply-to: <877fo0cem6.fsf@gnu.org> X-012-Sender: halo1@inter.net.il Message-id: <83twr365of.fsf@gnu.org> References: <877fo0cem6.fsf@gnu.org> X-Spam-Score: 1.0 (+) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: 1.0 (+) > From: Tassilo Horn > Date: Wed, 09 Sep 2015 08:04:49 +0200 > > stepping till the end of the function, this is the contents of the > locals buffer shows: > > --8<---------------cut here---------------start------------->8--- > struct it it nil > struct text_pos pt nil > struct window * w 0x12a1d40 > struct buffer * old_buffer 0x0 > Lisp_Object result 58 > --8<---------------cut here---------------end--------------->8--- > > But it and pt cannot be NULL/nil (and they are not when checking with > "info locals" in the GUD GDB buffer). > > The reason for that is that GUD uses the GDB command "-stack-list-locals > --thread X --simple-values" as defined in gdb-mi.el:3991 which returns: > > locals=[{name="it",type="struct it"}, > {name="pt",type="struct text_pos"}, > {name="w",type="struct window *",value="0x12a1d40"}, > {name="old_buffer",type="struct buffer *",value="0x0"}, > {name="result",type="Lisp_Object",value="58"}] > > Note that the entries for the two structs it and pt don't have a value > field. > > I guess the usage of --simple-values is intentional, and in fact, when > trying to use "--all-values" instead I get a > > error in process filter: gdb-jsonify-buffer: Stack overflow in regexp matcher Yes, the use of --simple-values is intentional. If you want to see the values of the fields, you need to click mouse-2 on the variable name, and then Emacs will pop up a frame with the fields. > I'm not actually sure if it would be benefitical to use --all-values > even if that regexp matching error was fixed because the structs can be > really large. But at least the value should not be shown as "nil" but > as "" or something else which makes it obvious that > the displayed value is not the real value. Like the patch below? If you think it's OK, I will push it. Thanks. --- lisp/progmodes/gdb-mi.el~0 2015-05-20 08:22:42.000000000 +0300 +++ lisp/progmodes/gdb-mi.el 2015-09-09 16:47:24.399310500 +0300 @@ -4038,6 +4038,8 @@ (let ((name (bindat-get-field local 'name)) (value (bindat-get-field local 'value)) (type (bindat-get-field local 'type))) + (when (not value) + (setq value "")) (if (or (not value) (string-match "\\0x" value)) (add-text-properties 0 (length name) From unknown Mon Aug 18 09:06:37 2025 X-Loop: help-debbugs@gnu.org Subject: bug#21438: 25.0.50; GUD locals frame/window doesn't shows struct values as nil Resent-From: Tassilo Horn Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 09 Sep 2015 15:11:03 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 21438 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: 21438@debbugs.gnu.org Received: via spool by 21438-submit@debbugs.gnu.org id=B21438.144181141921769 (code B ref 21438); Wed, 09 Sep 2015 15:11:03 +0000 Received: (at 21438) by debbugs.gnu.org; 9 Sep 2015 15:10:19 +0000 Received: from localhost ([127.0.0.1]:53971 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZZh0t-0005f3-1c for submit@debbugs.gnu.org; Wed, 09 Sep 2015 11:10:19 -0400 Received: from out1-smtp.messagingengine.com ([66.111.4.25]:38766) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZZh0q-0005ev-Pl for 21438@debbugs.gnu.org; Wed, 09 Sep 2015 11:10:17 -0400 Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailout.nyi.internal (Postfix) with ESMTP id 25BA720D4B for <21438@debbugs.gnu.org>; Wed, 9 Sep 2015 11:10:14 -0400 (EDT) Received: from frontend2 ([10.202.2.161]) by compute6.internal (MEProxy); Wed, 09 Sep 2015 11:10:14 -0400 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-sasl-enc :x-sasl-enc; s=smtpout; bh=8X8e/3GDrQASLqvjyKpv3+tnFOI=; b=NPg5F OA3S7PHMpqGawzu2qj0reL05cF0/PJJSi/ATC4onyD08kVzbMktndEX21facWUIK h81QTF8sLZjgQgJKUlCD19EuE7TCf7gc9OIhi7h4W6qy90poamPL+EC84WZfrzbJ aqbD6jJu9X6QfhKok1ltKRUSipa74KR1hQMii4= X-Sasl-enc: wSUnsVg3N8006Z+ovFDL6U7CwpN8+Y2YdwsqjXCOk1Pz 1441811413 Received: from thinkpad-t440p (unknown [2.161.206.107]) by mail.messagingengine.com (Postfix) with ESMTPA id 26784680217; Wed, 9 Sep 2015 11:10:12 -0400 (EDT) From: Tassilo Horn References: <877fo0cem6.fsf@gnu.org> <83twr365of.fsf@gnu.org> Date: Wed, 09 Sep 2015 17:10:10 +0200 In-Reply-To: <83twr365of.fsf@gnu.org> (Eli Zaretskii's message of "Wed, 09 Sep 2015 17:14:24 +0300") Message-ID: <87y4gfljcd.fsf@gnu.org> User-Agent: Gnus/5.130014 (Ma Gnus v0.14) Emacs/25.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: 0.3 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: 0.3 (/) Eli Zaretskii writes: >> I guess the usage of --simple-values is intentional, and in fact, when >> trying to use "--all-values" instead I get a >> >> error in process filter: gdb-jsonify-buffer: Stack overflow in regexp matcher > > Yes, the use of --simple-values is intentional. If you want to see > the values of the fields, you need to click mouse-2 on the variable > name, and then Emacs will pop up a frame with the fields. Yes, or I can watch the variable and get a nice speedbar tree view which I can expand recursively. Really nice! >> I'm not actually sure if it would be benefitical to use --all-values >> even if that regexp matching error was fixed because the structs can be >> really large. But at least the value should not be shown as "nil" but >> as "" or something else which makes it obvious that >> the displayed value is not the real value. > > Like the patch below? If you think it's OK, I will push it. Yes, that's exactly what I had in mind. Bye, Tassilo From unknown Mon Aug 18 09:06:37 2025 MIME-Version: 1.0 X-Mailer: MIME-tools 5.503 (Entity 5.503) X-Loop: help-debbugs@gnu.org From: help-debbugs@gnu.org (GNU bug Tracking System) To: Tassilo Horn Subject: bug#21438: closed (Re: bug#21438: 25.0.50; GUD locals frame/window doesn't shows struct values as nil) Message-ID: References: <83pp1r60wu.fsf@gnu.org> <877fo0cem6.fsf@gnu.org> X-Gnu-PR-Message: they-closed 21438 X-Gnu-PR-Package: emacs Reply-To: 21438@debbugs.gnu.org Date: Wed, 09 Sep 2015 15:58:03 +0000 Content-Type: multipart/mixed; boundary="----------=_1441814283-26883-1" This is a multi-part message in MIME format... ------------=_1441814283-26883-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Your bug report #21438: 25.0.50; GUD locals frame/window doesn't shows struct values as nil which was filed against the emacs package, has been closed. The explanation is attached below, along with your original report. If you require more details, please reply to 21438@debbugs.gnu.org. --=20 21438: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D21438 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems ------------=_1441814283-26883-1 Content-Type: message/rfc822 Content-Disposition: inline Content-Transfer-Encoding: 7bit Received: (at 21438-done) by debbugs.gnu.org; 9 Sep 2015 15:57:30 +0000 Received: from localhost ([127.0.0.1]:54017 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZZhkY-0006ys-24 for submit@debbugs.gnu.org; Wed, 09 Sep 2015 11:57:30 -0400 Received: from mtaout23.012.net.il ([80.179.55.175]:51233) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZZhkV-0006yi-DJ for 21438-done@debbugs.gnu.org; Wed, 09 Sep 2015 11:57:28 -0400 Received: from conversion-daemon.a-mtaout23.012.net.il by a-mtaout23.012.net.il (HyperSendmail v2007.08) id <0NUF005002RGNU00@a-mtaout23.012.net.il> for 21438-done@debbugs.gnu.org; Wed, 09 Sep 2015 18:57:26 +0300 (IDT) Received: from HOME-C4E4A596F7 ([84.94.185.246]) by a-mtaout23.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NUF005792ZPLZ30@a-mtaout23.012.net.il>; Wed, 09 Sep 2015 18:57:26 +0300 (IDT) Date: Wed, 09 Sep 2015 18:57:21 +0300 From: Eli Zaretskii Subject: Re: bug#21438: 25.0.50; GUD locals frame/window doesn't shows struct values as nil In-reply-to: <87y4gfljcd.fsf@gnu.org> X-012-Sender: halo1@inter.net.il To: Tassilo Horn Message-id: <83pp1r60wu.fsf@gnu.org> References: <877fo0cem6.fsf@gnu.org> <83twr365of.fsf@gnu.org> <87y4gfljcd.fsf@gnu.org> X-Spam-Score: 1.0 (+) X-Debbugs-Envelope-To: 21438-done Cc: 21438-done@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: Eli Zaretskii List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: 1.0 (+) > From: Tassilo Horn > Cc: 21438@debbugs.gnu.org > Date: Wed, 09 Sep 2015 17:10:10 +0200 > > >> I'm not actually sure if it would be benefitical to use --all-values > >> even if that regexp matching error was fixed because the structs can be > >> really large. But at least the value should not be shown as "nil" but > >> as "" or something else which makes it obvious that > >> the displayed value is not the real value. > > > > Like the patch below? If you think it's OK, I will push it. > > Yes, that's exactly what I had in mind. Thanks, pushed. ------------=_1441814283-26883-1 Content-Type: message/rfc822 Content-Disposition: inline Content-Transfer-Encoding: 7bit Received: (at submit) by debbugs.gnu.org; 9 Sep 2015 06:05:24 +0000 Received: from localhost ([127.0.0.1]:53223 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZZYVW-0008D3-TR for submit@debbugs.gnu.org; Wed, 09 Sep 2015 02:05:24 -0400 Received: from eggs.gnu.org ([208.118.235.92]:59375) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZZYVT-0008Ct-23 for submit@debbugs.gnu.org; Wed, 09 Sep 2015 02:05:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZZYVO-0008Qr-UP for submit@debbugs.gnu.org; Wed, 09 Sep 2015 02:05:18 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50,T_DKIM_INVALID, T_RP_MATCHES_RCVD autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:35220) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZZYVO-0008Qk-Rm for submit@debbugs.gnu.org; Wed, 09 Sep 2015 02:05:14 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41077) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZZYVH-0000VI-QR for bug-gnu-emacs@gnu.org; Wed, 09 Sep 2015 02:05:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZZYVD-0008Du-M2 for bug-gnu-emacs@gnu.org; Wed, 09 Sep 2015 02:05:07 -0400 Received: from out4-smtp.messagingengine.com ([66.111.4.28]:55560) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZZYVD-0008D5-Ia for bug-gnu-emacs@gnu.org; Wed, 09 Sep 2015 02:05:03 -0400 Received: from compute2.internal (compute2.nyi.internal [10.202.2.42]) by mailout.nyi.internal (Postfix) with ESMTP id 72E7520C0C for ; Wed, 9 Sep 2015 02:05:00 -0400 (EDT) Received: from frontend2 ([10.202.2.161]) by compute2.internal (MEProxy); Wed, 09 Sep 2015 02:05:00 -0400 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d= messagingengine.com; h=content-type:date:from:message-id :mime-version:subject:to:x-sasl-enc:x-sasl-enc; s=smtpout; bh=yf AsrEG9est16TEZ3ssLLefBq3I=; b=uOEHGEoTQCa85Mt1buIrfmUFZ/Obve/QgQ nyubtCl/JZ/GcZh7IRWOgQzgHxayo77CFy9z3qwM9ETykzcODQnsBVogpCA2V6tK ELftIRlrzR+FG9bljBTime5yev9AABgOZyIjeXdCmaepb4uQQUljJBuZAzb6p0mr 4jRuSQXho= X-Sasl-enc: dR+yxXgCPNS3S5dAyuRgR/X5BfRLcMJWsDL8bBRVI/vY 1441778699 Received: from thinkpad-t440p (unknown [2.161.206.107]) by mail.messagingengine.com (Postfix) with ESMTPA id 970C068016A for ; Wed, 9 Sep 2015 02:04:59 -0400 (EDT) From: Tassilo Horn To: bug-gnu-emacs@gnu.org Subject: 25.0.50; GUD locals frame/window doesn't shows struct values as nil Date: Wed, 09 Sep 2015 08:04:49 +0200 Message-ID: <877fo0cem6.fsf@gnu.org> MIME-Version: 1.0 Content-Type: text/plain X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -5.0 (-----) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -5.0 (-----) When debugging C code with M-x gdb and enabling the locals window or frame, the values of structs (just structs, no struct pointers) are always displayed as nil. For example, when debugging in xdisp.c --8<---------------cut here---------------start------------->8--- DEFUN ("line-pixel-height", Fline_pixel_height, Sline_pixel_height, 0, 0, 0, doc: /* Return height in pixels of text line in the selected window. Value is the height in pixels of the line at point. */) (void) { struct it it; struct text_pos pt; struct window *w = XWINDOW (selected_window); struct buffer *old_buffer = NULL; Lisp_Object result; ... } --8<---------------cut here---------------end--------------->8--- and stepping till the end of the function, this is the contents of the locals buffer shows: --8<---------------cut here---------------start------------->8--- struct it it nil struct text_pos pt nil struct window * w 0x12a1d40 struct buffer * old_buffer 0x0 Lisp_Object result 58 --8<---------------cut here---------------end--------------->8--- But it and pt cannot be NULL/nil (and they are not when checking with "info locals" in the GUD GDB buffer). The reason for that is that GUD uses the GDB command "-stack-list-locals --thread X --simple-values" as defined in gdb-mi.el:3991 which returns: locals=[{name="it",type="struct it"}, {name="pt",type="struct text_pos"}, {name="w",type="struct window *",value="0x12a1d40"}, {name="old_buffer",type="struct buffer *",value="0x0"}, {name="result",type="Lisp_Object",value="58"}] Note that the entries for the two structs it and pt don't have a value field. I guess the usage of --simple-values is intentional, and in fact, when trying to use "--all-values" instead I get a error in process filter: gdb-jsonify-buffer: Stack overflow in regexp matcher I'm not actually sure if it would be benefitical to use --all-values even if that regexp matching error was fixed because the structs can be really large. But at least the value should not be shown as "nil" but as "" or something else which makes it obvious that the displayed value is not the real value. In GNU Emacs 25.0.50.15 (x86_64-unknown-linux-gnu, GTK+ Version 3.16.6) of 2015-09-09 Repository revision: 39dca94701de81d02c75316e32d67e3677bd685d Windowing system distributor 'The X.Org Foundation', version 11.0.11702000 System Description: Arch Linux Configured using: 'configure 'CFLAGS=-g -ggdb3 -O0'' Configured features: XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS NOTIFY ACL GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 Important settings: value of $LC_MONETARY: de_DE.utf8 value of $LC_NUMERIC: de_DE.utf8 value of $LC_TIME: de_DE.utf8 value of $LANG: en_US.utf8 locale-coding-system: utf-8-unix Major mode: Debugger Minor modes in effect: diff-auto-refine-mode: t global-company-mode: t shell-dirtrack-mode: t global-aggressive-indent-mode: t pdf-occur-global-minor-mode: t recentf-mode: t global-subword-mode: t subword-mode: t save-place-mode: t savehist-mode: t show-paren-mode: t ivy-mode: t minibuffer-depth-indicate-mode: t electric-pair-mode: t tooltip-mode: t global-eldoc-mode: t electric-indent-mode: t mouse-wheel-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t column-number-mode: t line-number-mode: t transient-mark-mode: t Recent messages: Type C-x 1 to delete the help window. mouse-2, RET: find function's definition Unable to find location in file Entering debugger... 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/home/horn/Repos/el/emacs/lisp/gnus/nnbabyl ~/Repos/el/gnus/lisp/nnmbox hides /home/horn/Repos/el/emacs/lisp/gnus/nnmbox ~/Repos/el/gnus/lisp/gnus-win hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-win ~/Repos/el/gnus/lisp/gnus-async hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-async ~/Repos/el/gnus/lisp/mm-url hides /home/horn/Repos/el/emacs/lisp/gnus/mm-url ~/Repos/el/gnus/lisp/gnus-html hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-html ~/Repos/el/gnus/lisp/gssapi hides /home/horn/Repos/el/emacs/lisp/gnus/gssapi ~/Repos/el/gnus/lisp/mml2015 hides /home/horn/Repos/el/emacs/lisp/gnus/mml2015 ~/Repos/el/gnus/lisp/nnrss hides /home/horn/Repos/el/emacs/lisp/gnus/nnrss ~/Repos/el/gnus/lisp/gnus-mh hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-mh ~/Repos/el/gnus/lisp/gnus-sum hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-sum ~/Repos/el/gnus/lisp/nnweb hides /home/horn/Repos/el/emacs/lisp/gnus/nnweb ~/Repos/el/gnus/lisp/mail-prsvr hides /home/horn/Repos/el/emacs/lisp/gnus/mail-prsvr ~/Repos/el/gnus/lisp/nnmairix hides /home/horn/Repos/el/emacs/lisp/gnus/nnmairix ~/Repos/el/gnus/lisp/plstore hides /home/horn/Repos/el/emacs/lisp/gnus/plstore ~/Repos/el/gnus/lisp/rfc2045 hides /home/horn/Repos/el/emacs/lisp/gnus/rfc2045 ~/Repos/el/gnus/lisp/gnus-msg hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-msg ~/Repos/el/gnus/lisp/spam-wash hides /home/horn/Repos/el/emacs/lisp/gnus/spam-wash ~/Repos/el/gnus/lisp/gnus-score hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-score ~/Repos/el/gnus/lisp/mm-uu hides /home/horn/Repos/el/emacs/lisp/gnus/mm-uu ~/Repos/el/gnus/lisp/spam hides /home/horn/Repos/el/emacs/lisp/gnus/spam ~/Repos/el/gnus/lisp/mm-view hides /home/horn/Repos/el/emacs/lisp/gnus/mm-view ~/Repos/el/gnus/lisp/sieve-mode hides /home/horn/Repos/el/emacs/lisp/gnus/sieve-mode ~/Repos/el/gnus/lisp/html2text hides /home/horn/Repos/el/emacs/lisp/gnus/html2text ~/Repos/el/gnus/lisp/gnus-ems hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-ems ~/Repos/el/gnus/lisp/registry hides /home/horn/Repos/el/emacs/lisp/gnus/registry ~/Repos/el/gnus/lisp/auth-source hides /home/horn/Repos/el/emacs/lisp/gnus/auth-source ~/Repos/el/gnus/lisp/gravatar hides /home/horn/Repos/el/emacs/lisp/gnus/gravatar ~/Repos/el/gnus/lisp/flow-fill hides /home/horn/Repos/el/emacs/lisp/gnus/flow-fill ~/Repos/el/gnus/lisp/gmm-utils hides /home/horn/Repos/el/emacs/lisp/gnus/gmm-utils ~/Repos/el/gnus/lisp/mailcap hides /home/horn/Repos/el/emacs/lisp/gnus/mailcap ~/Repos/el/gnus/lisp/gnus-delay hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-delay ~/Repos/el/gnus/lisp/mm-bodies hides /home/horn/Repos/el/emacs/lisp/gnus/mm-bodies ~/Repos/el/gnus/lisp/mm-archive hides /home/horn/Repos/el/emacs/lisp/gnus/mm-archive ~/Repos/el/gnus/lisp/rfc1843 hides /home/horn/Repos/el/emacs/lisp/gnus/rfc1843 ~/Repos/el/gnus/lisp/gnus-kill hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-kill ~/Repos/el/gnus/lisp/qp hides /home/horn/Repos/el/emacs/lisp/gnus/qp ~/Repos/el/gnus/lisp/score-mode hides /home/horn/Repos/el/emacs/lisp/gnus/score-mode ~/Repos/el/gnus/lisp/gnus-topic hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-topic ~/Repos/el/gnus/lisp/gnus-cache hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-cache ~/Repos/el/gnus/lisp/nnmail hides /home/horn/Repos/el/emacs/lisp/gnus/nnmail ~/Repos/el/gnus/lisp/gnus-vm hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-vm ~/Repos/el/gnus/lisp/gnus-sync hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-sync ~/Repos/el/gnus/lisp/nnoo hides /home/horn/Repos/el/emacs/lisp/gnus/nnoo ~/Repos/el/gnus/lisp/nnregistry hides /home/horn/Repos/el/emacs/lisp/gnus/nnregistry ~/Repos/el/gnus/lisp/gnus-dup hides /home/horn/Repos/el/emacs/lisp/gnus/gnus-dup ~/Repos/el/gnus/lisp/parse-time hides /home/horn/Repos/el/emacs/lisp/calendar/parse-time ~/Repos/el/gnus/lisp/time-date hides /home/horn/Repos/el/emacs/lisp/calendar/time-date Features: (shadow sort mail-extr gnus-msg emacsbug sendmail misearch multi-isearch hippie-exp debug eieio-opt speedbar sb-image ezimage dframe gdb-mi bindat json gud find-dired grep smex ido seq vc vc-dispatcher vc-git diff-mode cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs colir color company-files company-oddmuse company-keywords company-etags company-gtags company-dabbrev-code company-dabbrev company-capf company-cmake company-xcode company-clang company-semantic company-eclim company-template company-css company-nxml company-bbdb company stratego-mode greql-mode tg-mode generic preview-latex tex-site auto-loads cider tramp-sh cider-debug cider-browse-ns cider-inspector cider-mode cider-repl cider-eldoc cider-interaction spinner arc-mode archive-mode cider-overlays cider-doc org-table org org-macro org-footnote org-pcomplete org-list org-faces org-entities org-version ob-emacs-lisp ob ob-tangle ob-ref ob-lob ob-table ob-exp org-src ob-keys ob-comint ob-core ob-eval org-compat org-macs org-loaddefs cal-menu calendar cal-loaddefs cider-test cider-stacktrace 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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 system-font-setting font-render-setting move-toolbar gtk x-toolkit x multi-tty make-network-process emacs) Memory information: ((conses 16 811381 90006) (symbols 48 52202 16) (miscs 40 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