Re: 64-bit emacs crashes a lot

[Ryan Johnson <ryan.johnson@cs.utoronto.ca>]

On 16/08/2013 9:31 AM, Eli Zaretskii wrote:
>> Date: Fri, 16 Aug 2013 07:41:44 -0400
>> From: Ryan Johnson <ryan.johnson@cs.utoronto.ca>
>>
>> On 16/08/2013 4:58 AM, Eli Zaretskii wrote:
>>> Again, please move this discussion to emacs-devel.
>> Back pointer: http://cygwin.com/ml/cygwin/2013-08/msg00273.html
>>
>>>> Date: Thu, 15 Aug 2013 22:35:54 -0400
>>>> From: Ken Brown <kbrown@cornell.edu>
>>>>
>>>> 1. Invoke 'emacs-nox -Q' in mintty.
>>>>
>>>> 2. M-x compile C-a C-k ls RET
>>>>
>>>> 3. C-x o
>>>>
>>>> 4. Hit 'g' repeatedly.
>>>>
>>>> I got it to abort with Fatal error 6 after slightly over 100 repetitions.
>>>>
>>>> I then tried the same thing with emacs-X11 (running under X, not in
>>>> mintty).  I hit 'g' 200 times without a problem.  I repeated this with
>>>> emacs-w32, again 200 times without a problem.
>>>>
>>>> So there's a bug somewhere.  But if it's an emacs bug, it's strange that
>>>> it only occurs with emacs-nox and not with either of the GUI versions of
>>>> emacs.
>>> I suspect that buffer relocation might be the reason.  Can you show a
>>> backtrace from the fatal error in an unoptimized build, with the above
>>> recipe?
>> I'll try to get one. Meanwhile, is there a quick way to disable buffer
>> relocation as a sanity test?
> I don't think so, but maybe it's already disabled in your build.  What
> do you see on these two lines when configure finishes:
>
>    Should Emacs use a relocating allocator for buffers?    yes
>    Should Emacs use mmap(2) for buffer allocation?         no
>
> In any case, you could configure with --enable-checking=all, it might
> catch the problem earlier.
   Should Emacs use the GNU version of malloc?             yes
   Should Emacs use a relocating allocator for buffers?    no
   Should Emacs use mmap(2) for buffer allocation?         yes

Hmm... during bootstrap I got the following with checking enabled:
> Loading loadup.el (source)...
> Using load-path (/scratch/emacs-24.3/lisp 
> /scratch/emacs-24.3/lisp/emacs-lisp /scratch/emacs-24.3/lisp/language 
> /scratch/emacs-24.3/lisp/international /scratch/emacs-24.3/lisp/textmodes)
> Loading emacs-lisp/byte-run...
> Loading emacs-lisp/backquote...
> Loading subr...
> Loading version...
> <** snip **>
> Loading international/mule-cmds...
> Loading case-table...
> Loading /scratch/emacs-24.3/lisp/international/charprop.el (source)...
> Loading international/characters...
> static heap exhausted: avail 10485760 used 9751456 failed request 790528
> Makefile:795: recipe for target `bootstrap-emacs.exe' failed
> make[1]: *** [bootstrap-emacs.exe] Error 1
> make[1]: Leaving directory `/scratch/emacs-24.3/src'
> Makefile:334: recipe for target `src' failed
> make: *** [src] Error 2

Without checking I get this output instead (and bootstrap completes):
> Finding pointers to doc strings...
> Finding pointers to doc strings...done
> Dumping under the name emacs
> Static heap usage: 9753632 of 10485760 bytes
> 77714 pure bytes used

Is there a way to grow the static heap?

Ryan