Re: GDB does not stop in breakpoint!

[A. Soare]

>     I put a breakpoint in Fx_create_frame. When I start emacs using "r" , the
>     breakpoint is never reached, and the X windows stops responding.
> 
> There are times, when the screen is grabbed, that stopping the program
> would cause X not to respond.  If you have put the breakpoint at a
> line which is in the middle of a grab, that would explain this.
> 

What means that the screen to be grabbed? How does this happen?


> Most of the code inside Fx_create_frame is NOT in the middle of a
> grab, and this problem should not happen in those places.
> 
> Can you connect from another machine with ssh and run gdb from
> the other machine?
> 
> 


I have a macintosh on my table, and I connect on linux, but there is no use ... 
over ssh the code will be the code for console, that works well. If I set the 
DISPLAY var:

Emacs checks at startup whether DISPLAY variable is set, and here is the result.


(gdb) set height 10000
(gdb) show environment 
TERM=xterm-color
SHELL=/bin/bash
XDG_SESSION_COOKIE=28814368defdc69e6f7455fa4b4dfcdd-1263458361.341927-1471763996
SSH_CLIENT=192.168.2.124 50118 22
SSH_TTY=/dev/pts/7
USER=root
LS_COLORS=rs=0:di=01;34:ln=01;36:hl=44;37:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.lzma=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.rar=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.axa=00;36:*.oga=00;36:*.spx=00;36:*.xspf=00;36:
MAIL=/var/mail/root
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
PWD=/emacs/src
LANG=en_US.UTF-8
SPEECHD_PORT=6560
SHLVL=1
HOME=/root
LOGNAME=root
SSH_CONNECTION=192.168.2.124 50118 192.168.2.64 22
LESSOPEN=| /usr/bin/lesspipe %s
LESSCLOSE=/usr/bin/lesspipe %s %s
_=/usr/bin/gdb
OLDPWD=/emacs
LINES=24
COLUMNS=80
(gdb) set environment DISPLAY=:0
(gdb) set environment DISPLAY=:0.0
(gdb) r -Q
Starting program: /emacs/src/emacs -Q
[Thread debugging using libthread_db enabled]

Program received signal SIGSEGV, Segmentation fault.
0x080f314f in check_x_display_info (object=138336946) at xfns.c:289
289           dpyinfo = FRAME_X_DISPLAY_INFO (f);
(gdb) 




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