From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Martijn Saelens Newsgroups: gmane.emacs.bugs Subject: bug#24508: 25.1; M-x gdb crashes when used on windows + cygwin Date: Thu, 22 Sep 2016 11:35:05 +0200 Message-ID: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=001a1147cbec7f712b053d156045 X-Trace: blaine.gmane.org 1474559771 4884 195.159.176.226 (22 Sep 2016 15:56:11 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 22 Sep 2016 15:56:11 +0000 (UTC) To: 24508@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Sep 22 17:56:06 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bn6Lt-0008Pg-5m for geb-bug-gnu-emacs@m.gmane.org; Thu, 22 Sep 2016 17:55:57 +0200 Original-Received: from localhost ([::1]:51642 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bn6Lr-0000qR-By for geb-bug-gnu-emacs@m.gmane.org; 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charset=UTF-8 Content-Transfer-Encoding: quoted-printable M-x gdb crashes when trying to set a breakpoint on main. Emacs runs on windows and uses the gdb from cygwin. I can reproduce this on multiple machines using the following steps in emacs -Q: 1. Open a *.cpp file in emacs. I've used the following file "test.cpp": #include int main() { std::cout << "Hello world!" << std::endl; return 0; } 2. Compile the file using M-x compile: g++ -g test.cpp -o test.exe 3. start gdb using M-x gdb: gdb -i=3Dmi test.exe 4. inside gdb type "break main". The gdb prompt dissapears and the debugger becomes unusable. The full output of *gud-test.exe*: Current directory is c:/Users/martijns/ GNU gdb (GDB) (Cygwin 7.10.1-1) 7.10.1 Copyright (C) 2015 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later < http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-pc-cygwin". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from test.exe...done. (gdb) break main Breakpoint 1 at 0x4011de: file test.cpp, line 6. (gdb) list test.cpp:1 1 2 #include 3 4 int main() 5 { 6 std::cout << "Hello world!" << std::endl; 7 return 0; 8 } If I use the commandline for gdb, then gdb works as expected. Versions of the used software: $ gdb --version GNU gdb (GDB) (Cygwin 7.10.1-1) 7.10.1 Copyright (C) 2015 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later < http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-pc-cygwin". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word". $ emacs --version GNU Emacs 25.1.1 Copyright (C) 2016 Free Software Foundation, Inc. GNU Emacs comes with ABSOLUTELY NO WARRANTY. You may redistribute copies of GNU Emacs under the terms of the GNU General Public License. For more information about these matters, see the file named COPYING. =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D In GNU Emacs 25.1.1 (i686-w64-mingw32) of 2016-09-17 built on LAPHROAIG Windowing system distributor 'Microsoft Corp.', version 6.3.9600 Configured using: 'configure --host=3Di686-w64-mingw32 --without-dbus --without-compress-install CFLAGS=3D-static' Configured features: XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY ACL GNUTLS LIBXML2 ZLIB TOOLKIT_SCROLL_BARS Important settings: value of $LANG: ENU locale-coding-system: cp1252 Major mode: Debugger Minor modes in effect: shell-dirtrack-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 blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Recent messages: Making completion list... [2 times] Compilation finished Making completion list... delete-backward-char: Text is read-only Compilation finished mwheel-scroll: Beginning of buffer [3 times] C-c e is undefined is undefined [2 times] Target doesn=E2=80=99t support non-stop mode. Turning it off. Note: file is write protected Load-path shadows: None found. Features: (shadow sort mail-extr emacsbug message dired format-spec rfc822 mml mml-sec password-cache epg epg-config gnus-util mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util help-fns mail-prsvr mail-utils cl-seq gdb-mi bindat json map seq byte-opt gv bytecomp byte-compile cconv gud shell pcomplete compile comint ansi-color ring vc-git diff-mode easy-mmode cl-extra help-mode cc-mode cc-fonts easymenu cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs cl-loaddefs pcase cl-lib time-date mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel dos-w32 ls-lisp disp-table w32-win w32-vars term/common-win 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 w32notify w32 multi-tty make-network-process emacs) Memory information: ((conses 8 136689 12899) (symbols 32 24315 0) (miscs 32 103 225) (strings 16 30312 5157) (string-bytes 1 977977) (vectors 8 19122) (vector-slots 4 511617 4848) (floats 8 202 47) (intervals 28 691 49) (buffers 520 27)) --001a1147cbec7f712b053d156045 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

M-x gdb crashes when trying to set a breakpoint on m= ain. Emacs runs on

windows and uses the gdb from cygwin. I can reproduc= e this on multiple

machines using the following steps in emacs -Q:

=C2=A0

1. Open a *.cpp file in emacs. I've used the fol= lowing file "test.cpp":

=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 #include <iostream>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 int main()

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 {

=C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0std::cout << "Hello world!" << std::endl;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0 return 0;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0

2. Compile the file using M-x compile: g++ -g test.c= pp -o test.exe

3. start gdb using M-x gdb: gdb -i=3Dmi test.exe

4. inside gdb type "break main". The gdb p= rompt dissapears and the

debugger becomes unusable. The full output of *gud-test.exe*:

=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 Current directory is c:/Users/martijns/

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 GNU gdb (GDB) (Cygwin 7.10.1-1) 7.10.1

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 Copyright (C) 2015 Free Software Foundation, Inc.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 This is free software: you are free to change and redistribute it.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 There is NO WARRANTY, to the extent permitted by law.=C2=A0 Type "show copying"

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 and "show warranty" for details.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 This GDB was configured as "i686-pc-cygwin".

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 Type "show configuration" for configuration details.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 For bug reporting instructions, please see:

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 <http://www.gnu= .org/software/gdb/bugs/>.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 Find the GDB manual and other documentation resources online at:

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 <http:= //www.gnu.org/software/gdb/documentation/>.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 For help, type "help".

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 Type "apropos word" to search for commands related to "word"= ...

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 Reading symbols from test.exe...done.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0(gdb) break main

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 Breakpoint 1 at 0x4011de: file test.cpp, line 6.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 (gdb) list test.cpp:1

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 1=C2=A0=C2=A0=C2=A0=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 2=C2=A0=C2=A0=C2=A0=C2=A0 #include <iostream>=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 3=C2=A0=C2=A0=C2=A0=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 4=C2=A0=C2=A0=C2=A0=C2=A0 int main()

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 5=C2=A0=C2=A0=C2=A0=C2=A0 {

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 6=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0 std::cout << "Hello world!" << std::endl;

=C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0= =C2=A0=C2=A0=C2=A07=C2=A0=C2=A0=C2=A0=C2=A0 =C2= =A0 return 0;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 8=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0

If I use the commandline for gdb, then gdb works as expected.

=C2=A0

Versions of the used software:

=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 $ gdb --version

=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 GNU gdb (GDB) (Cygwin 7.10.1-1) 7.10.1

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 Copyright (C) 2015 Free Software Foundation, Inc.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 This is free software: you are free to change and redistribute it.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 There is NO WARRANTY, to the extent permitted by law.=C2=A0 Type "show copying"

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 and "show warranty" for details.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 This GDB was configured as "i686-pc-cygwin".

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 Type "show configuration" for configuration details.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 For bug reporting instructions, please see:

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 <http://www.gnu= .org/software/gdb/bugs/>.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 Find the GDB manual and other documentation resources online at:

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 <http:= //www.gnu.org/software/gdb/documentation/>.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 For help, type "help".

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 Type "apropos word" to search for commands related to "word"= .

=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 $ emacs --version

=C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 GNU Emacs 25.1.1

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 Copyright (C) 2016 Free Software Foundation, Inc.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 GNU Emacs comes with ABSOLUTELY NO WARRANTY.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 You may redistribute copies of GNU Emacs

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 under the terms of the GNU General Public License.

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 For more information about these matters, see the file named COPYING.

=C2=A0

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D

=C2=A0

In GNU Emacs 25.1.1 (i686-w64-mingw32)

=C2=A0of 2016-09-17 built on LAPHROAIG

Windowing system distributor 'Microsoft Corp.= 9;, version 6.3.9600

Configured using:

=C2=A0'configure --host=3Di686-w64-mingw32 --without-dbus

=C2=A0--without-compress-install CFLAGS= =3D-static'

=C2=A0

Configured features:

XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY ACL GNUTLS L= IBXML2 ZLIB

TOOLKIT_SCROLL_BARS

=C2=A0

Important settings:

=C2=A0 value of $LANG: ENU

=C2=A0 locale-coding-system: cp1252

=C2=A0

Major mode: Debugger

=C2=A0

Minor modes in effect:

=C2=A0 shell-dirtrack= -mode: t

=C2=A0 diff-auto-refi= ne-mode: t

=C2=A0 tooltip-mode: = t

=C2=A0 global-eldoc-m= ode: t

=C2=A0 electric-inden= t-mode: t

=C2=A0 mouse-wheel-mo= de: t

=C2=A0 tool-bar-mode:= t

=C2=A0 menu-bar-mode:= t

=C2=A0 file-name-shad= ow-mode: t

=C2=A0 global-font-lo= ck-mode: t

=C2=A0 font-lock-mode= : t

=C2=A0 blink-cursor-m= ode: t

=C2=A0 auto-compositi= on-mode: t

=C2=A0 auto-encryptio= n-mode: t

=C2=A0 auto-compressi= on-mode: t

=C2=A0 line-number-mo= de: t

=C2=A0 transient-mark= -mode: t

=C2=A0

Recent messages:

Making completion list... [2 times]

Compilation finished

Making completion list...

delete-backward-char: Text is read-only

Compilation finished

mwheel-scroll: Beginning of buffer [3 times]

C-c e is undefined

<C-tab> is undefined [2 times]

Target doesn=E2=80=99t support non-stop mode.= =C2=A0 Turning it off.

Note: file is write protected

=C2=A0

Load-path shadows:

None found.

=C2=A0

Features:

(shadow sort mail-extr emacsbug message dired format= -spec rfc822 mml

mml-sec password-cache epg epg-config gnus-util mm-d= ecode mm-bodies

mm-encode mail-parse rfc2231 mailabbrev gmm-utils ma= ilheader sendmail

rfc2047 rfc2045 ietf-drums mm-util help-fns mail-prs= vr mail-utils cl-seq

gdb-mi bindat json map seq byte-opt gv bytecomp byte= -compile cconv gud

shell pcomplete compile comint ansi-color ring vc-gi= t diff-mode

easy-mmode cl-extra help-mode cc-mode cc-fonts easym= enu cc-guess

cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs

cl-loaddefs pcase cl-lib time-date mule-util tooltip= eldoc electric

uniquify ediff-hook vc-hooks lisp-float-type mwheel = dos-w32 ls-lisp

disp-table w32-win w32-vars term/common-win 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 tha= i tai-viet lao

korean japanese eucjp-ms cp51932 hebrew greek romani= an slovak czech

european ethiopic indian cyrillic chinese charscript case-table epa-hook

jka-cmpr-hook help simple abbrev minibuffer cl-prelo= aded 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 w32notify w32 mul= ti-tty

make-network-process emacs)

=C2=A0

Memory information:

((conses 8 136689 12899)

=C2=A0(symbols 32 24315 0)

=C2=A0(miscs 32 103 225)

=C2=A0(strings 16 30312 5157)

=C2=A0(string-bytes 1 977977)

=C2=A0(vectors 8 19122)

=C2=A0(vector-slots 4 511617 4848)

=C2=A0(floats 8 202 47)

=C2=A0(intervals 28 691 49)

=C2=A0(buffers 520 27))

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