Lee Shombert be4b6a53c1
Work-around for system property failures ...
Bug: 236932163
This change adds a work-around to PropertyInvalidatedCache for
failures to set a system property. Such failures cause fatal crashes
in Android but it is believed that a simple retry will succeed.
(Note: the failures have only been reported on partner devices and
cannot be reproduced on Pixel phones, so no root-cause is available
yet.)
RuntimeExceptions (thrown from android_os_SystemProperties.cpp) are
caught and retried. The retry limit is 5 times with a 200ms delay
between attempts. This means that the maximum delay is 1s, whcih
should avoid triggering an ANR.
In addition to automated testing, a manual test was created with
ambush code in the system property component of libc. The ambush code
injected an error into the set-property logic for cache keys. It was
observed that the system recovered properly.
Test: atest:
* FrameworksCoreTests:PropertyInvalidatedCacheTests
* FrameworksCoreTests:IpcDataCacheTest
Change-Id: I3a124b185c7499a45b27df7cbf889ae6d1d33377
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be4b6a53c1
