docs: def enable_faulthandler(cls, signum=signal.SIGUSR1):
          """
          Enable dumping thread stack traces when specified signals are received, similar to java's handling of SIGQUIT
  
          Note: this must be called from the surviving process in case of daemonization.
          Note that SIGQUIT does not work in all environments with a python process.
  
          :param int|None signum: Signal number to register for full thread stack dump (use None to disable)
          """
          with cls._lock:
              if not signum:
                  cls._disable_faulthandler()
                  return
              if not cls.file_handler or faulthandler is None:
                  return
              cls.faulthandler_signum = signum
              dump_file = cls.file_handler.stream
              faulthandler.enable(file=dump_file, all_threads=True)
              faulthandler.register(signum, file=dump_file, all_threads=True, chain=False)