|
From: | Martijn Saelens |
Subject: | bug#24508: 25.1; M-x gdb crashes when used on windows + cygwin |
Date: | Thu, 22 Sep 2016 11:35:05 +0200 |
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 <iostream>
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=mi 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:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
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 <iostream>
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:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
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.
========================================================================
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=i686-w64-mingw32 --without-dbus
--without-compress-install CFLAGS=-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
<C-tab> is undefined [2 times]
Target doesn’t 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))
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