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Date: Thu, 13 Oct 2011 13:33:08 -0400
From: Ryan Johnson <ryan DOT johnson AT cs DOT utoronto DOT ca>
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Subject: Re: Problem w/ gdb 7.3.50-2 under emacs
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On 17/09/2011 8:51 AM, Ken Brown wrote:
> On 9/13/2011 11:48 PM, Bill Priest wrote:
>> All,
>>        I updated gdb to 7.3.50-2 and I can no longer run M-x gdb under
>> emacs inside rxvt (gdb core dumps).  Reverting back to 7.3.50-1 and it
>> works.  The executable being debugged is built with gcc 4.5.3 and gdb
>> under rxvt and ddd works.  Running M-x shell (/bin/sh) gdb also works.
>>   Running M-x gdba fails identically  to M-x gdb.  The odd thing is
>> that after "Reading symbols ... done" nothing is typed and the
>> "Debugger segmentation fault (core dumped) occurs w/o typing a key.
>>
>> Bill
>>
>> t.c
>> --------------
>> #include<stdio.h>
>>
>> int main(void)
>> {
>>   printf("Hello World\n");
>>   return 0;
>> }
>> ---------------
>>
>> compiled with
>> gcc -Wall -g -o t t.c
>>
>>
>> Current directory is ~/
>> GNU gdb (GDB) 7.3.50.20110821-cvs (cygwin-special)
>> Copyright (C) 2011 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-cygwin".
>> For bug reporting instructions, please see:
>> <http://www.gnu.org/software/gdb/bugs/>...
>> Reading symbols from /home/wpriest/t.exe...done.
>> (gdb)
>> Debugger segmentation fault (core dumped)
>
> I can confirm this.  Bug M-x gud-gdb seems to work fine.  I realize, 
> however, that it may not give you the graphical interface that you'd 
> like.
>
> Notice that when you use M-x gdb, emacs calls gdb with the 
> --annotate=3 option.  A google search suggests that this option is 
> obsolete.  I don't know if that's part of the problem or not.  I can 
> run gdb with that option outside of emacs and it doesn't segfault.
I also encountered problems, though in my case gdb managed not only to 
hang, but also took emacs with it... I had to revert to the older version.

Has anybody figured out what might be causing the issue?

Ryan


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