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authorMike Achtelik <mike.achtelik@gmail.com>2022-06-28 09:55:25 +0200
committerMike Achtelik <mike.achtelik@gmail.com>2022-07-05 18:31:47 +0200
commitac984bd8768b3d7e6439e0ffd98fd8b53e16b922 (patch)
tree96eee14f0c443242a6ef6f4fb3228dd35d61398e /src/plugins/printsupport
parent100d5bd58296a02d989526a884f987dd9f388369 (diff)
Android A11Y: Fix deadlock in QtAndroidAccessibility::runInObjectContext()
On android the event loop is normally blocked, when the application is suspended, e.g. when it enters the background or when the screen is locked (see android.app.background_running). This leads to a problem when we try to process events after this happens, e.g. when android sends us an ACTION_CLEAR_ACCESSIBILITY_FOCUS event after the event loop is suspended. While handling it we eventually call QtAndroidAccessibility::runInObjectContext() which tries to do a blocking call on the object context, however, with the event loop being suspended we run into a deadlock which leads to an ANR. So we need to make sure to never make a blocking call while the event loop is suspended. Task-number: QTBUG-102594 Pick-to: 6.4 6.3 6.2 5.15 Change-Id: I33f0440a3da84fb4bdae5ab0fc10d514c73f23ad Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>
Diffstat (limited to 'src/plugins/printsupport')
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