TSAN identified a data race between updates to the states_ map (ex. in Mock::UnregisterLocked) and the iteration done in this destructor. Writes to the map use g_gmock_mutex, but the destructor does not acquire it. Acquiring the lock here fixes the data race.
It should only be possible to trigger this TSAN finding in cases where a mock object is deleted by a thread other than the main thread.
PiperOrigin-RevId: 591935393
Change-Id: I9dd1faa40058d78e165a91333346514b4b73365c
8495449f07