Log "dbexit: really exiting now" after all locks needed to shutdown are acquired

    void exitCleanly( ExitCode code ) {

...

        log() << "dbexit: really exiting now";

        if ( c ) c->shutdown();

        ::_exit(rc);

    }

c->shutdown requires locking a mutex. It is possible the process is not really exiting now after logging "dbexit: really exiting now". This line should only be printed when exit is guaranteed to be imminent. I suggest moving to after the if statement.