Function dfhack_crashlog_init

library/Crashlog.cpp:156–171

const int desired_signals[3] = {SIGSEGV,SIGILL,SIGABRT};
namespace DFHack {
    void dfhack_crashlog_init() {
        // Initialize eventfd flag
        crashlog_complete = eventfd(0, EFD_CLOEXEC);

        crashlog_thread = std::thread(dfhack_crashlog_thread);

        for (int signal : desired_signals) {
            std::signal(signal, dfhack_crashlog_handle_signal);
        }
        term_handler = std::set_terminate(dfhack_crashlog_handle_terminate);

        // https://sourceware.org/glibc/manual/latest/html_mono/libc.html#index-backtrace-1
        // backtrace is AsyncSignal-Unsafe due to dynamic loading of libgcc_s
        // Using it here ensures it is loaded before use in the signal handler.
        [[maybe_unused]] int _ = backtrace(crash_info.backtrace, 1);
    }

    void dfhack_crashlog_shutdown() {
        shutdown.exchange(true);