GSlice: failed to allocate 504 bytes

GSlice: failed to allocate 504 bytes

[Burton Samograd]

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Hello,

I've built emacs from git sources on a recent cygwin this morning and
when I try and run it, I get the following error on startup before it
crashes:

    ***MEMORY-ERROR***: [7588]: GSlice: failed to allocate 504 bytes
       (alignment: 512): Function not implemented

    Fatal error 6: Abortedaborted (core dumped)

Here's a gdb run with a not very useful looking backtrace:

(gdb) r
Starting program: /home/burton.samograd/src/emacs-git/src/emacs
[New Thread 7216.0x500]
[New Thread 7216.0xe3c]
[New Thread 7216.0x18e0]
[New Thread 7216.0xe38]
[New Thread 7216.0x1fac]
[New Thread 7216.0x19e0]

***MEMORY-ERROR***: [7216]: GSlice: failed to allocate 504 bytes
   (alignment: 512): Function not implemented

Fatal error 6: Aborted
Program received signal SIGABRT, Aborted.
0x00000000 in ?? ()
(gdb) bt
#0  0x00000000 in ?? ()
#1  0x77aaf8b1 in ntdll!RtlUpdateClonedSRWLock ()
   from /cygdrive/c/Windows/system32/ntdll.dll
#2  0x76f9149d in WaitForSingleObjectEx ()
   from /cygdrive/c/Windows/syswow64/KERNELBASE.dll
#3  0x000003ac in ?? ()
#4  0x00000000 in ?? ()

This is built with --with-x-toolkit=athena and attached is my
config.log.

--
Burton Samograd


[-- Attachment #2: config.log --]
[-- Type: application/octet-stream, Size: 1264 bytes --]


## ---------------------- ##
## Running config.status. ##
## ---------------------- ##

This file was extended by emacs config.status 24.3.50, which was
generated by GNU Autoconf 2.68.  Invocation command line was

  CONFIG_FILES    = 
  CONFIG_HEADERS  = 
  CONFIG_LINKS    = 
  CONFIG_COMMANDS = 
  $ ./config.status 

on CDW764-BURTONS

config.status:1824: creating Makefile
config.status:1824: creating lib/Makefile
config.status:1824: creating lib-src/Makefile
config.status:1824: creating oldXMenu/Makefile
config.status:1824: creating doc/emacs/Makefile
config.status:1824: creating doc/misc/Makefile
config.status:1824: creating doc/lispintro/Makefile
config.status:1824: creating doc/lispref/Makefile
config.status:1824: creating src/Makefile
config.status:1824: creating lwlib/Makefile
config.status:1824: creating lisp/Makefile
config.status:1824: creating leim/Makefile
config.status:1824: creating nextstep/Makefile
config.status:1824: creating test/automated/Makefile
config.status:1824: creating admin/unidata/Makefile
config.status:1824: creating src/config.h
config.status:2043: executing depfiles commands
config.status:2043: executing mkdirs commands
config.status:2043: executing epaths commands
config.status:2043: executing gdbinit commands

Re: GSlice: failed to allocate 504 bytes

[Ken Brown]

On 11/19/2012 11:02 AM, Burton Samograd wrote:
> Hello,
>
> I've built emacs from git sources on a recent cygwin this morning and
> when I try and run it, I get the following error on startup before it
> crashes:
>
>      ***MEMORY-ERROR***: [7588]: GSlice: failed to allocate 504 bytes
>         (alignment: 512): Function not implemented

This used to be a problem with the gtk build, for which the following 
workaround was put into emacs.c long ago:

#if defined (USE_GTK) && defined (G_SLICE_ALWAYS_MALLOC)
   /* This is used by the Cygwin build.  */
   setenv ("G_SLICE", "always-malloc", 1);
#endif

> This is built with --with-x-toolkit=athena

My guess is that Cygwin doesn't support building with x-toolkit=athena 
(or else you don't have the appropriate devel packages installed).  The 
build probably then reverted to the default gtk, but USE_GTK wasn't 
defined, so the code above didn't get invoked.  I'm guessing, because I 
can't tell anything from the config.log fragment that you attached, and 
I don't have time right now to dig into the code or to try a build with 
x-toolkit=athena myself.

Ken

Re: GSlice: failed to allocate 504 bytes

[Stefan Monnier]

> I've built emacs from git sources on a recent cygwin this morning and
> when I try and run it, I get the following error on startup before it
> crashes:

Could you test it with the `emacs-24' branch?  That's where the
testing&bugfixing is focused right now,


        Stefan

Re: GSlice: failed to allocate 504 bytes

[Ken Brown]

On 11/19/2012 11:47 AM, Ken Brown wrote:
> On 11/19/2012 11:02 AM, Burton Samograd wrote:
>> Hello,
>>
>> I've built emacs from git sources on a recent cygwin this morning and
>> when I try and run it, I get the following error on startup before it
>> crashes:
>>
>>      ***MEMORY-ERROR***: [7588]: GSlice: failed to allocate 504 bytes
>>         (alignment: 512): Function not implemented
>
> This used to be a problem with the gtk build, for which the following
> workaround was put into emacs.c long ago:
>
> #if defined (USE_GTK) && defined (G_SLICE_ALWAYS_MALLOC)
>    /* This is used by the Cygwin build.  */
>    setenv ("G_SLICE", "always-malloc", 1);
> #endif
>
>> This is built with --with-x-toolkit=athena

I see the problem.  (And the guess in my previous email was wrong.)

The workaround above was intended to solve a problem on Cygwin whenever 
the emacs build depended on Glib.  When I provided that workaround, I 
thought this only happened in a GTK build.  But I see now that there are 
other things that can cause emacs to depend on Glib, even in a Lucid 
build.  This happens in both the trunk and the emacs-24 branch.

The following patch fixes it:

=== modified file 'src/emacs.c'
--- src/emacs.c 2012-10-31 17:27:29 +0000
+++ src/emacs.c 2012-11-19 20:50:37 +0000
@@ -702,7 +702,7 @@
    stack_base = &dummy;
  #endif

-#if defined (USE_GTK) && defined (G_SLICE_ALWAYS_MALLOC)
+#ifdef G_SLICE_ALWAYS_MALLOC
    /* This is used by the Cygwin build.  */
    setenv ("G_SLICE", "always-malloc", 1);
  #endif


Stefan, is it OK to apply this to the emacs-24 branch?  The bug is not a 
regression, but I think the patch is clearly safe.  And it affects only 
the Cygwin build.

Ken

Re: GSlice: failed to allocate 504 bytes

[Burton Samograd]

Ken Brown <kbrown@cornell.edu> writes:

> On 11/19/2012 11:47 AM, Ken Brown wrote:
>> On 11/19/2012 11:02 AM, Burton Samograd wrote:
>>> Hello,
>>>
>>> I've built emacs from git sources on a recent cygwin this morning and
>>> when I try and run it, I get the following error on startup before it
>>> crashes:
>>>
>>>      ***MEMORY-ERROR***: [7588]: GSlice: failed to allocate 504 bytes
>>>         (alignment: 512): Function not implemented
>>
>> This used to be a problem with the gtk build, for which the following
>> workaround was put into emacs.c long ago:
>>
>> #if defined (USE_GTK) && defined (G_SLICE_ALWAYS_MALLOC)
>>    /* This is used by the Cygwin build.  */
>>    setenv ("G_SLICE", "always-malloc", 1);
>> #endif
>>
>>> This is built with --with-x-toolkit=athena
>
> I see the problem.  (And the guess in my previous email was wrong.)
>
> The workaround above was intended to solve a problem on Cygwin whenever 
> the emacs build depended on Glib.  When I provided that workaround, I 
> thought this only happened in a GTK build.  But I see now that there are 
> other things that can cause emacs to depend on Glib, even in a Lucid 
> build.  This happens in both the trunk and the emacs-24 branch.
>
> The following patch fixes it:
>
> === modified file 'src/emacs.c'
> --- src/emacs.c 2012-10-31 17:27:29 +0000
> +++ src/emacs.c 2012-11-19 20:50:37 +0000
> @@ -702,7 +702,7 @@
>     stack_base = &dummy;
>   #endif
>
> -#if defined (USE_GTK) && defined (G_SLICE_ALWAYS_MALLOC)
> +#ifdef G_SLICE_ALWAYS_MALLOC
>     /* This is used by the Cygwin build.  */
>     setenv ("G_SLICE", "always-malloc", 1);
>   #endif
>
>
> Stefan, is it OK to apply this to the emacs-24 branch?  The bug is not a 
> regression, but I think the patch is clearly safe.  And it affects only 
> the Cygwin build.

That patch worked for me, and the build no-longer crashes on
startup. Thanks.

--
Burton Samograd

Re: GSlice: failed to allocate 504 bytes

[Stefan Monnier]

> Stefan, is it OK to apply this to the emacs-24 branch?

Yes, go ahead, please install it on the emacs-24 branch rather than on
the trunk.


        Stefan

Re: GSlice: failed to allocate 504 bytes

[Ken Brown]

On 11/19/2012 11:52 PM, Stefan Monnier wrote:
>> Stefan, is it OK to apply this to the emacs-24 branch?
>
> Yes, go ahead, please install it on the emacs-24 branch rather than on
> the trunk.

Done as bzr revision 110924 on the emacs-24 branch.

Ken

Re: GSlice: failed to allocate 504 bytes

[Stefan Monnier]

> Done as bzr revision 110924 on the emacs-24 branch.

Thank you,


        Stefan