Method installTerminateHandler

Fleece/Support/Backtrace.cc:344–366

    void Backtrace::installTerminateHandler(function<void(const string&)> logger) {
        static once_flag sOnce;
        call_once(sOnce, [&] {
            static auto const sLogger = move(logger);
            static terminate_handler const sOldHandler = set_terminate([] {
                // ---- Code below gets called by C++ runtime on an uncaught exception ---
                if (sLogger) {
                    stringstream out;
                    writeCrashLog(out);
                    sLogger(out.str());
                } else {
                    cerr << "\n\n******************** C++ fatal error ********************\n";
                    writeCrashLog(cerr);
                    cerr << "\n******************** Now terminating ********************\n";
                }
                // Chain to old handler:
                sOldHandler();
                // Just in case the old handler doesn't abort:
                abort();
                // ---- End of handler ----
            });
        });
    }

}