Guards the SQLCipher cold-start crash fixed in 592a797 (bug #210): a cold
process opening an already-encrypted cache with nothing to convert reached
Room's keyed nativeOpen with the native .so unloaded and crash-looped with
UnsatisfiedLinkError. Every existing on-device test (DatabaseEncryptionTest,
DatabaseProvisionerInstrumentedTest, DatabaseModuleInstrumentedTest,
AccountDataMigratorTest) runs a conversion first, which loads the process-global
library in-process, masking the bug exactly as production did.
System.loadLibrary is process-global, so the instrumentation process can no
longer observe a cold open once it has minted the encrypted fixture. This adds
ColdOpenCacheProbe -- a debug-only ContentProvider declared with
android:process=":coldopen" -- to host the open in a separate, pristine app
process. The test mints the encrypted fixture in the instrumentation process
(a file created by a prior encrypted DB instance) and drives the cold open in
the :coldopen process via ContentResolver.call, mirroring DatabaseProvisioner's
encrypted branch + DatabaseModule's open lambda against the real DatabaseEncryption,
DeferredOpenHelperFactory and SupportOpenHelperFactory. A cold probe (a keyed open
with no preceding load, asserted to throw UnsatisfiedLinkError) makes the isolation
self-verifying: the test fails rather than passing hollow if the library was
already loaded in the harness process.
Verified locally on an API 36 emulator (connectedDebugAndroidTest): 1 test,
0 failures.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Jason Ross
JMR-devandClaude Opus 4.8