diff options
author | Morten Johan Sørvig <morten.sorvig@theqtcompany.com> | 2016-03-14 09:52:09 +0100 |
---|---|---|
committer | Timur Pocheptsov <timur.pocheptsov@theqtcompany.com> | 2016-03-15 04:25:50 +0000 |
commit | c4886ca42732feb51648985b741a8113382a6fba (patch) | |
tree | 238c3e52c54212e6398b0a3ecf91fd0e891e7e19 /src/plugins/platforms/cocoa/qcocoaintegration.mm | |
parent | 063ad1c8b629318288223792c0ca7ab3f991f3e6 (diff) |
Cocoa: Fix crash on screen disconnect.
Maintain virtual siblings list on screen deletion.
QCocoaIntegration::updateScreens() has a loop which
will delete all non-current QScreen objects using
QPlatformIntegration::destroyScreen().
destroyScreen() vill eventually call QWindowPrivate::
setTopLevelScreen() which accesses the virtual siblings
list for the deleted screen.
This can cause a stale pointer access if the virtual
screen list is not up to date, especially when disconnecting
two screens at the same time.
Change-Id: Ia6b9d01edf8e5eea25b64604a2b3b28b173125f7
Task-number: QTBUG-48275
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@theqtcompany.com>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>
Diffstat (limited to 'src/plugins/platforms/cocoa/qcocoaintegration.mm')
-rw-r--r-- | src/plugins/platforms/cocoa/qcocoaintegration.mm | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/plugins/platforms/cocoa/qcocoaintegration.mm b/src/plugins/platforms/cocoa/qcocoaintegration.mm index 6bec6b191d..91d4b2706b 100644 --- a/src/plugins/platforms/cocoa/qcocoaintegration.mm +++ b/src/plugins/platforms/cocoa/qcocoaintegration.mm @@ -422,14 +422,18 @@ void QCocoaIntegration::updateScreens() } siblings << screen; } + + // Set virtual siblings list. All screens in mScreens are siblings, because we ignored the + // mirrors. Note that some of the screens we update the siblings list for here may be deleted + // below, but update anyway to keep the to-be-deleted screens out of the siblings list. + foreach (QCocoaScreen* screen, mScreens) + screen->setVirtualSiblings(siblings); + // Now the leftovers in remainingScreens are no longer current, so we can delete them. foreach (QCocoaScreen* screen, remainingScreens) { mScreens.removeOne(screen); destroyScreen(screen); } - // All screens in mScreens are siblings, because we ignored the mirrors. - foreach (QCocoaScreen* screen, mScreens) - screen->setVirtualSiblings(siblings); } QCocoaScreen *QCocoaIntegration::screenAtIndex(int index) |