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Re: 64-bit emacs crashes a lot


On 8/15/2013 7:14 PM, Ryan Johnson wrote:
On 15/08/2013 6:48 PM, Ryan Johnson wrote:
On 15/08/2013 6:02 PM, Ken Brown wrote:
On 8/15/2013 5:58 PM, Ken Brown wrote:
On 8/15/2013 5:24 PM, Ryan Johnson wrote:
On 15/08/2013 5:14 PM, Ken Brown wrote:
On 8/15/2013 4:55 PM, Ryan Johnson wrote:
Program received signal SIGSEGV, Segmentation fault.
___chkstk_ms () at
/usr/src/debug/gcc-4.8.1-1/libgcc/config/i386/cygwin.S:146

You're not using the latest gcc, which is 4.8.1-3.  Any chance that
that's your problem?
Heh. I actually do have the latest gcc, but somehow the upgrade didn't
pick up the debug package (which showed as not installed in
setup.exe).
I have manually upgraded it now.

OK.  But doesn't the above show that the crash is occurring in gcc, not
emacs?

BTW, how do you compile emacs from the sources given? I tried
untarring
and patching, but I get the message:
configure: error: Emacs hasn't been ported to `x86_64-unknown-cygwin'
systems.
Check `etc/MACHINES' for recognized configuration names.

One of the patches changes configure.ac, so you have to run autoreconf
after applying it.

Or it might be 'autoreconf -I m4'.

Something is still wrong:

$ cd /scratch
$ tar xaf /usr/src/emacs-24.3.tar.xz
$ patch -p1 </usr/src/emacs-24.3-5.cygwin.patch
patching file emacs-24.3/CYGWIN-PATCHES/emacs-X11.postinstall
patching file emacs-24.3/CYGWIN-PATCHES/emacs-X11.preremove
patching file emacs-24.3/CYGWIN-PATCHES/emacs-w32.postinstall
patching file emacs-24.3/CYGWIN-PATCHES/emacs-w32.preremove
patching file emacs-24.3/CYGWIN-PATCHES/emacs.postinstall
patching file emacs-24.3/CYGWIN-PATCHES/emacs.preremove
Ah, it seems there's a /usr/src/configure.ac.patch that happens to
belong to emacs...

... but unfortunately it seems that -fsanitize is only supported on
Linux and Darwin right now, so there's little reason to build emacs
unless you could use some particular information that a debug build
provides. Rats.

But a build without optimization would make your backtraces more useful.

Ken

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