code: def forward_all_signals_async(target_pid, process_name):
      
      def forwarding_signal_handler(signum):
          _forward_signal(signum, process_name, forwarding_signal_handler.target_pid)
  
      # Somehow we get a Python SystemError sometimes if we access target_pid directly from inside function.
      forwarding_signal_handler.target_pid = target_pid
  
      for signum in _FORWARDABLE_SIGNALS:
          # Need to directly access libc function,
          # the state of the signal module is incorrect due to the clone()
          # (it may think we are in a different thread than the main thread).
          libc.signal(signum, forwarding_signal_handler)
  
      # Reactivate delivery of signals such that our handler gets called.
      reset_signal_handling()
docs: Install all signal handler that forwards all signals to the given process.