camera2 ndk/vndk: cleanup->stop CameraDevice's looper in ~ACameraDevice()
It's possible that the following sequence happens:
1) hwbinder / binder thread T1: onResultReceived() starts -> promotes wp<CameraDevice> to sp<>;
2) Some other app thread T2 : ACameraDevice_close() -> delete ACameraDevice -> doesn't result in
CameraDevice's destructor running since mCameraDevice has another live
reference, app destroys some object O1.
3) T3 (callback looper thread): callback is received since looper is still running which accesses
dead app object O1 -> results in undefined behavior.
4) T1: onResultReceived completes and CameraDevice is destructed
We need to stop CameraDevice's looper thread (that waits for all callbacks queued to complete) in
~ACameraDevice() so we receive no callbacks after ACameraDevice is closed.
Bug: 135641415
Test: CTS native tests: no new failures
Test: AImageReaderVendorTest; enroll; while(1) auth;
Change-Id: Ia24de753f6ee409d941fff39616f09df2164880a
Merged-In: Ia24de753f6ee409d941fff39616f09df2164880a
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>
(cherry picked from commit 174084011ca8b593a8cf35412928517b9e864be9)
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>
4 files changed