1158970 - Compositor and controller threads can race when accessing Axis::mVelocity

Status: RESOLVED DUPLICATE of bug 1642884

(Core :: Panning and Zooming, defect, P3)

Description

[Botond Ballo [:botond]]

Code in AsyncPanZoomController and Axis often accesses Axis::mVelocity without holding the APZC's mMonitor. This can lead to races between the compositor and controller threads. For example, the compositor thread could be updating the velocity while sampling an animation, while the controller thread is updating the velocity in response to an input event.

We should avoid these races. One way to do so would be to make sure all accesses to Axis::mVelocity are protected by mMonitor, although this may be fairly tedious as there are a lot of such accesses.

Comment 1

[Botond Ballo [:botond]]

This was fixed in bug 1642884.