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authorMartin Stransky <stransky@redhat.com>2016-11-30 22:02:53 +0100
committerMartin Stransky <stransky@redhat.com>2016-11-30 22:02:53 +0100
commit5f619866d5617cad80fdc1e38436224befd734f7 (patch)
tree2763dbcd432f027a53947409b769ece1d9b1b8bf /mozilla-1271100.patch
parentUpdate to latest upstream (50.0.2) (diff)
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Added fix for 'ABORT: X_ShmAttach: BadAccess' crashes (mozbz#1271100)
Diffstat (limited to 'mozilla-1271100.patch')
-rw-r--r--mozilla-1271100.patch37
1 files changed, 37 insertions, 0 deletions
diff --git a/mozilla-1271100.patch b/mozilla-1271100.patch
new file mode 100644
index 0000000..ee76024
--- /dev/null
+++ b/mozilla-1271100.patch
@@ -0,0 +1,37 @@
+# HG changeset patch
+# User Lee Salzman <lsalzman@mozilla.com>
+# Date 1480470918 18000
+# Tue Nov 29 20:55:18 2016 -0500
+# Node ID ffc92a98adee4c3ebb1f3b8c593e913a74ef6a4a
+# Parent 8d8846f63b74eb930e48b410730ae088e9bdbee8
+work around race in system Cairo's XShm usage
+
+MozReview-Commit-ID: VGee6ungCz
+
+diff --git a/widget/gtk/mozgtk/mozgtk.c b/widget/gtk/mozgtk/mozgtk.c
+--- a/widget/gtk/mozgtk/mozgtk.c
++++ b/widget/gtk/mozgtk/mozgtk.c
+@@ -606,8 +606,23 @@ STUB(gdk_window_set_back_pixmap)
+ STUB(gdk_x11_colormap_foreign_new)
+ STUB(gdk_x11_colormap_get_xcolormap)
+ STUB(gdk_x11_drawable_get_xdisplay)
+ STUB(gdk_x11_drawable_get_xid)
+ STUB(gdk_x11_window_get_drawable_impl)
+ STUB(gdkx_visual_get)
+ STUB(gtk_object_get_type)
+ #endif
++
++#include <X11/Xlib.h>
++// Bug 1271100
++// We need to trick system Cairo into not using the XShm extension due to
++// a race condition in it that results in frequent BadAccess errors. Cairo
++// relies upon XShmQueryExtension to initially detect if XShm is available.
++// So we define our own stub that always indicates XShm not being present.
++// mozgtk loads before libXext/libcairo and so this stub will take priority.
++// Our tree usage goes through xcb and remains unaffected by this.
++MOZ_EXPORT Bool
++XShmQueryExtension(Display* aDisplay)
++{
++ return False;
++}
++
bgstack15