RE: Emacs Resource (GDI) Leak on Windows

[Maguire, Andrew \(GE Infra, Energy\)]

Thanks very much for replying.

I am using Windows XP SP2 - I support a number of users who also have the same 
problem.
In the past, I am sure Windows 2000 was also affected.

I was using the prebuilt binary:
In GNU Emacs 21.2.1 (i386-msvc-nt5.1.2600)
 of 2002-03-19 on buffy
configured using `configure --with-msvc (12.00)'
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ENG
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: nil

It is interesting that the development version does not appear to display the 
leak.
Can you confirm it with one of the released versions of Emacs?

I have the leak on Windows XP with 21.3
In GNU Emacs 21.3.1 (i386-msvc-nt5.1.2600)
 of 2003-03-28 on buffy
configured using `configure --with-msvc (12.00)'
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ENG
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Perhaps, if I could try the latest dev version of Emacs I could try it out 
locally,
in case it is somehow related to the way our machines are built.
I have never accessed devel code, not being that familiar with C, but I have 
been
supporting Elisp extensions for 10 years.

Thanks,
Andrew 

> -----Original Message-----
> From: Eli Zaretskii [mailto:address@hidden
> Sent: 04 February 2006 11:32
> To: Maguire, Andrew (GE Infra, Energy)
> Cc: address@hidden; address@hidden
> Subject: Re: Emacs Resource (GDI) Leak on Windows
> 
> 
> > Date: Fri, 03 Feb 2006 15:51:06 +0000
> > From: Andrew Maguire <address@hidden>
> > Cc: address@hidden
> > 
> > This GDI leakage is still an issue - Emacs 21.2/3
> > 
> > It appears to be directly related to the display of any 
> modified fonts, 
> > italic, bold etc.
> 
> I'm not sure I can reproduce the problem with the latest development
> sources, since you didn't show any numbers in your recipe.  See below.
> 
> > For examnple,
> > 
> > 1. start up a completely plain Emacs --no-site-file.
> > 2. Run Windows Task Manager and set it to display GDI object usage.
> 
> At this point, I have 105 GDI objects showing up in the Task Manager.
> If I wait enough for the splash screen to go away, I have 108 objects.
> 
> > 3. M-x list-faces-display
> 
> As soon as I type "M-x", the number of GDI objects goes up to 118.
> After typing "list-faces-display RET", the count goes up to 119.
> 
> > 4. SCroll the buffer up and down a lot and GDI object count 
> increases.
> 
> It increases to 121 and stops there.
> 
> > 5. Make the *Faces* buffer editable and remove all lines 
> whose font is
> >     not simply a modified foreground a background colour, 
> i.e. italic
> >     bold, fixed-pitch, variable-pitch, mode-line and tool-bar.
> > 6. Repeat scrolling up and down to force redisplay of the screen
> >     and not that although the GDI count may go up by 1 or 2 
> after you
> >     stop scrolling the extra GDI resource is released 
> leaving with the
> >     same number as before.
> 
> This doesn't change the count for me.  Does that mean that the problem
> was solved, and there's no more leakage anymore?  I'm asking because
> it's not clear to me where did you see the leakage--you seem to be
> telling that whenever the fonts are not used, their GDI objects are
> released, which to me seems to mean there's no leak.
> 
> Finally, please tell what version of Windows is that.
> 
> And thanks for your report.
>