code: func (daemon *Daemon) reloadPlatform(conf *config.Config, attributes map[string]string) error {
  	if err := conf.ValidatePlatformConfig(); err != nil {
  		return err
  	}
  
  	if conf.IsValueSet("runtimes") {
  		// Always set the default one
  		conf.Runtimes[config.StockRuntimeName] = types.Runtime{Path: DefaultRuntimeBinary}
  		if err := daemon.initRuntimes(conf.Runtimes); err != nil {
  			return err
  		}
  		daemon.configStore.Runtimes = conf.Runtimes
  	}
  
  	if conf.DefaultRuntime != "" {
  		daemon.configStore.DefaultRuntime = conf.DefaultRuntime
  	}
  
  	if conf.IsValueSet("default-shm-size") {
  		daemon.configStore.ShmSize = conf.ShmSize
  	}
  
  	if conf.IpcMode != "" {
  		daemon.configStore.IpcMode = conf.IpcMode
  	}
  
  	// Update attributes
  	var runtimeList bytes.Buffer
  	for name, rt := range daemon.configStore.Runtimes {
  		if runtimeList.Len() > 0 {
  			runtimeList.WriteRune(' ')
  		}
  		runtimeList.WriteString(fmt.Sprintf("%s:%s", name, rt))
  	}
  
  	attributes["runtimes"] = runtimeList.String()
  	attributes["default-runtime"] = daemon.configStore.DefaultRuntime
  	attributes["default-shm-size"] = fmt.Sprintf("%d", daemon.configStore.ShmSize)
  	attributes["default-ipc-mode"] = daemon.configStore.IpcMode
  
  	return nil
  }
docs: // reloadPlatform updates configuration with platform specific options
  // and updates the passed attributes