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Enrico Weigelt, metux IT consult e5d7ce8ea8 (!1709) treewide: NULL-protect ScreenRec->DestroyPixmap() calls 
Right now, we're assuming that even when deep nesting involved, the proc
vector is always set to a valid function. One the one hand it requires
extra dummy procs in some cases, OTOH it's making upcoming refactoring
of the code flow unnecessarily complex.

The big plot (of subsequent commits) is splitting out the extension's
(and possibly subsystem's) special logic out of the wrapping chain and
let them be executed independently from the DDX/drivers - when applicable
even only when the pixmap is really destroyed (not just unref'ed).
(At some later point, it might even become be actually a valid situation
that DestroyPixmap vector really being NULL.)

See: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1754
See: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1755

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
 		2024-10-31 19:23:49 +01:00
.gitlab-ci CI: update meson from 0.56.2 (bullseye) to 1.0.0 (bullseye-backports) 2024-09-09 07:47:32 -07:00
Xext (!1709) treewide: NULL-protect ScreenRec->DestroyPixmap() calls 2024-10-31 19:23:49 +01:00
Xi Xi: avoid NULL pointer dereference if GetXTestDevice returns NULL 2024-10-28 05:38:25 +00:00
composite dix: unexport Ones() 2024-10-26 16:35:57 +00:00
config drop obsolete HAVE_DIX_CONFIG_H 2024-10-10 13:38:31 +00:00
damageext drop obsolete HAVE_DIX_CONFIG_H 2024-10-10 13:38:31 +00:00
dbe drop obsolete HAVE_DIX_CONFIG_H 2024-10-10 13:38:31 +00:00
dix dix: limit checks to MAX_VALUATORS when generating Xi events 2024-10-28 05:38:25 +00:00
doc dix: move colormap flags into colormap_priv.h and rename them 2024-09-01 22:06:50 +00:00
dri3 treewide: replace xnfalloc() calls to XNFalloc() 2024-07-26 23:41:33 +00:00
exa (!1709) treewide: NULL-protect ScreenRec->DestroyPixmap() calls 2024-10-31 19:23:49 +01:00
fb dix: unexport Ones() 2024-10-26 16:35:57 +00:00
glamor (!1709) treewide: NULL-protect ScreenRec->DestroyPixmap() calls 2024-10-31 19:23:49 +01:00
glx drop obsolete HAVE_DIX_CONFIG_H 2024-10-10 13:38:31 +00:00
hw xwayland/present: Check allow_commits in xwl_present_flip 2024-10-30 10:56:31 +00:00
include dix-config.h: add HAVE_SOCKLEN_T definition 2024-10-30 12:26:58 -07:00
man Xserver.man: Note that -byteswappedclients is the default in this release 2024-03-23 10:27:03 -07:00
mi mi: misprite.h: drop unnecessary extern on functions 2024-10-10 14:44:52 +00:00
miext (!1709) treewide: NULL-protect ScreenRec->DestroyPixmap() calls 2024-10-31 19:23:49 +01:00
os dix: Use __builtin_popcountl if available to replace Ones() 2024-10-26 10:04:13 -07:00
present build: Move epoll dependency check 2024-09-02 11:52:26 +00:00
pseudoramiX pseudoramix: replace PseudoramiXTrace & PseudoramiXDebug by LogMessageVerb 2024-10-10 18:59:40 +00:00
randr randr: fix wrong call to RRGetScreenResources() in swapped case 2024-10-10 20:59:35 +00:00
record drop obsolete HAVE_DIX_CONFIG_H 2024-10-10 13:38:31 +00:00
render render: avoid NULL pointer dereference if PictureFindVisual returns NULL 2024-10-28 05:38:25 +00:00
test dix: unexport non-public functions from dixgrabs.h and document prototypes 2024-10-10 13:50:57 +00:00
xfixes drop obsolete HAVE_DIX_CONFIG_H 2024-10-10 13:38:31 +00:00
xkb xkb: Fix buffer overflow in _XkbSetCompatMap() 2024-10-29 14:41:59 +01:00
.appveyor.yml appveyor: Add libxcvt build dep 2021-11-04 13:03:25 +00:00
.dir-locals.el .dir-locals.el: Add missing final newline 2019-10-01 17:05:28 +00:00
.gitignore Clean up the .gitignore file 2024-01-12 00:50:24 +00:00
.gitlab-ci.yml ci: reduce nolibdecor build to xwayland only 2024-09-10 13:49:30 +02:00
.mailmap Add a .mailmap file to canonicalize author names and emails 2023-03-15 18:10:51 +00:00
.travis.yml travis: Add OSX meson build to matrix 2019-05-02 15:42:58 +00:00
COPYING modesetting: Merge modesetting's COPYING into the xserver's. 2014-09-15 12:46:02 -07:00
README.md Fix spelling/wording issues 2020-07-05 13:07:33 -07:00
meson.build meson: list required version of xproto headers in xorg-server.pc 2024-09-09 07:48:07 -07:00
meson_options.txt os: drop SUN-DES-1 authentication 2024-06-18 00:52:11 +00:00
xorg-server.m4 xorg-server.m4: just all cflags instead of just sdkdir 2018-09-20 20:12:24 +01:00
xorg-server.pc.in xfree86: link modules against Xorg symbols on Cygwin 2012-04-05 21:57:07 -05:00
xserver.ent.in doc: relocate xserver.ent in the package root directory 2011-05-14 11:22:26 -07:00

README.md

X Server

The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into.

Windows are then composed on the actual screen by the X server (or by a separate composite manager) as directed by the window manager, which usually communicates with the user via graphical controls such as buttons and draggable titlebars and borders.

For a comprehensive overview of X Server and X Window System, consult the following article: https://en.wikipedia.org/wiki/X_server

All questions regarding this software should be directed at the Xorg mailing list:

https://lists.freedesktop.org/mailman/listinfo/xorg

The primary development code repository can be found at:

https://gitlab.freedesktop.org/xorg/xserver

For patch submission instructions, see:

https://www.x.org/wiki/Development/Documentation/SubmittingPatches

As with other projects hosted on freedesktop.org, X.Org follows its Code of Conduct, based on the Contributor Covenant. Please conduct yourself in a respectful and civilized manner when using the above mailing lists, bug trackers, etc:

https://www.freedesktop.org/wiki/CodeOfConduct