Throttle sensor sampling rates at 200Hz.
Only sensors of the following types are throttled: accelerometer, gyroscope and magnetometer.
Both direct and non-direct connections are throttled, as follows:
- If the microphone toggle is on: all apps are throttled at 200Hz, regardless of their targetSDK.
- If the microphone toggle is off:
+ If apps target SDK <= R, no throttling.
+ If apps target SDK >= S and has the HIGH_SAMPLING_RATE_SENSORS permission, no throttling.
+ If apps target SDK >= S and does not have the HIGH_SAMPLING_RATE_SENSORS permission:
+ Sampling rates are throttled at 200 Hz.
+ If run in debug mode, a SecurityException is thrown.
Test: atest CtsSensorTestCases CtsSensorRatePermissionTestCases
Bug: 136069189
Change-Id: Idd3ba874eee34859b3f090af59def0a939688c07
diff --git a/services/sensorservice/SensorEventConnection.h b/services/sensorservice/SensorEventConnection.h
index 9487a39..7c8c4f3 100644
--- a/services/sensorservice/SensorEventConnection.h
+++ b/services/sensorservice/SensorEventConnection.h
@@ -137,10 +137,10 @@
// Call noteOp for the sensor if the sensor requires a permission
bool noteOpIfRequired(const sensors_event_t& event);
-
sp<SensorService> const mService;
sp<BitTube> mChannel;
uid_t mUid;
+ std::atomic_bool mIsRateCappedBasedOnPermission;
mutable Mutex mConnectionLock;
// Number of events from wake up sensors which are still pending and haven't been delivered to
// the corresponding application. It is incremented by one unit for each write to the socket.