init.cpp:1635 prints mapBlockIndex.size() without cs_main. This is technically a race (though it is rather inconsequential). At some point someone should fix this so tsan stops complaining.
if (nScriptCheckThreads) {
        for (int i=0; i<nScriptCheckThreads-1; i++)
            threadGroup.create_thread(&ThreadScriptCheck);
    }
    
    CScheduler::Function serviceLoop = boost::bind(&CScheduler::serviceQueue, &scheduler);
    threadGroup.create_thread(boost::bind(&TraceThread<CScheduler::Function>, "scheduler", serviceLoop));
    GetMainSignals().RegisterBackgroundSignalScheduler(scheduler);
    /* Start the RPC server already.  It will be started in "warmup" mode
     * and not really process calls already (but it will signify connections
     * that the server is there and will be ready later).  Warmup mode will
     * be disabled when initialisation is finished.
     */
    if (gArgs.GetBoolArg("-server", false))
    {
        uiInterface.InitMessage.connect(SetRPCWarmupStatus);
        if (!AppInitServers(threadGroup))
            return InitError(_("Unable to start HTTP server. See debug log for details."));
    }
    int64_t nStart;
    
#ifdef ENABLE_WALLET
    if (!CWallet::Verify())
        return false;
#endif