Bug#471126: x11-utils: doesn't list some ghost windows that xrestop shows

[Tim Connors]

Package: x11-utils
Version: 7.3+1
Severity: normal

Due to a resource leak in both xloadimage -onroot and xli -onroot
(bugs 325689, 387030, and 471121), I have been left with the dreaded:

Xlib: connection to :0.0 refused by server
Xlib: Maximum number of clients reached
xterm Xt error: Can't open display: :0.0

xrestop shows 100 or so of these ghost windows:

253 - unknown ( PID:  ?   ):
res_base  : ox20
res_mask  : ox1f
windows   : 0
GCs   : 1
fonts : 0
pixmaps   : 0
pictures  : 0
glyphsets : 0
colormaps : 0
passive grabs : 0
cursors   : 0
unknowns  : 0
pixmap bytes  : 0
other bytes   : ~24
total bytes   : ~24


that add up to give me my 255 window limit.

A similar leak in qiv leads to the shell snippet presented in bug
351816, involving xlsclients.  xlsclients doesn't list any of these
ghost windows though:

xlsclients -l | grep Window | wc -l
78

Is it possible, or indeed sensible, to list these windows in the same
fashion as xrestop?  I presume there would be still no simple way
involving xkill (or the like) of freeing those resources anyway, so it
might be a bit academic, however it is misleading to the user who is
trying to track down their resource leaks, not to have them listed in
the output of xlsclients.

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 
'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.24 (SMP w/2 CPU cores)
Locale: LANG=en_AU, LC_CTYPE=en_AU (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/bash

Versions of packages x11-utils depends on:
ii  cpp4:4.2.2-2 The GNU C preprocessor (cpp)
ii  libc6  2.7-9 GNU C Library: Shared libraries
ii  libfontconfig1 2.5.0-2   generic font configuration library
ii  libfontenc11:1.0.4-2 X11 font encoding library
ii  libfreetype6   2.3.5-1+b1FreeType 2 font engine, shared lib
ii  libgl1-mesa-glx [libgl 7.0.3~rc2-1   A free implementation of the OpenG
ii  libice62:1.0.4-1 X11 Inter-Client Exchange library
ii  libsm6 2:1.0.3-1+b1  X11 Session Management library
ii  libx11-6   2:1.0.3-7 X11 client-side library
ii  libxaw72:1.0.4-1 X11 Athena Widget library
ii  libxext6   2:1.0.4-1 X11 miscellaneous extension librar
ii  libxft22.1.12-2  FreeType-based font drawing librar
ii  libxi6 2:1.1.3-1 X11 Input extension library
ii  libxinerama1   2:1.0.3-1 X11 Xinerama extension library
ii  libxmu62:1.0.4-1 X11 miscellaneous utility library
ii  libxmuu1   2:1.0.4-1 X11 miscellaneous micro-utility li
ii  libxrender11:0.9.4-1 X Rendering Extension client libra
ii  libxt6 1:1.0.5-3 X11 toolkit intrinsics library
ii  libxtst6   2:1.0.3-1 X11 Testing -- Resource extension 
ii  libxv1 1:1.0.3-1 X11 Video extension library
ii  libxxf86dga1   2:1.0.2-1 X11 Direct Graphics Access extensi
ii  libxxf86vm11:1.0.1-2 X11 XFree86 video mode extension l
ii  x11-common 1:7.3+10  X Window System (X.Org) infrastruc
ii  zlib1g 1:1.2.3.3.dfsg-11 compression library - runtime

x11-utils recommends no packages.

-- no debconf information



-- 
To UNSUBSCRIBE, email to [EMAIL PROTECTED]
with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]

Bug#471126: x11-utils: doesn't list some ghost windows that xrestop shows

[Brice Goglin]

retitle 471126 xlsclients doesn't list some ghost windows that xrestop shows
thank you



Tim Connors wrote:
 xrestop shows 100 or so of these ghost windows:

 253 - unknown ( PID:  ?   ):
 other bytes   : ~24
 total bytes   : ~24


 that add up to give me my 255 window limit.

 A similar leak in qiv leads to the shell snippet presented in bug
 351816, involving xlsclients.  xlsclients doesn't list any of these
 ghost windows though:

 xlsclients -l | grep Window | wc -l
 78

 Is it possible, or indeed sensible, to list these windows in the same
 fashion as xrestop?  I presume there would be still no simple way
 involving xkill (or the like) of freeing those resources anyway, so it
 might be a bit academic, however it is misleading to the user who is
 trying to track down their resource leaks, not to have them listed in
 the output of xlsclients.
   

The reason is probably that xlsclients only lists actual clients (using
XQueryTree()) while xrestop shows resources (with XResQueryClients()).
So your ghost windows may be part of the latter but not of the former.

By the way, did you actually found your ghostwindows to be missing in
xlsclient, or did you just compare the number of entries? Could it be
that some clients appear multiple times in xrestop and only once in
xlsclients?

Brice



-- 
To UNSUBSCRIBE, email to [EMAIL PROTECTED]
with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]

Bug#471126: x11-utils: doesn't list some ghost windows that xrestop shows

[Tim Connors]

On Sun, 16 Mar 2008, Brice Goglin wrote:

 The reason is probably that xlsclients only lists actual clients (using
 XQueryTree()) while xrestop shows resources (with XResQueryClients()).
 So your ghost windows may be part of the latter but not of the former.

 By the way, did you actually found your ghostwindows to be missing in
 xlsclient, or did you just compare the number of entries? Could it be
 that some clients appear multiple times in xrestop and only once in
 xlsclients?

There is one 'unknown' client according to xlsclients:

Window 0x1a01:
  Machine:  dirac
  Name:  unknown
  Icon Name:  unknown
  Command:  'unknown'
  Instance/Class:  unknown/unknown

Presumably corresponding to the one root window that is still owned.

In xrestop, one more of these ghost windows is created per invocation of
the erroneous xli/xloadimage.

In xlsclients, the entries are presumably not duplicated - they have
unique res_base.

-- 
TimC
A debugged program is one for which you have not yet found the
conditions that make it fail.-- Jerry Ogdin



-- 
To UNSUBSCRIBE, email to [EMAIL PROTECTED]
with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]