ngx_event_debug_t 1057 event/ngx_event.c     ngx_event_debug_t  *dc;
ngx_event_debug_t 1135 event/ngx_event.c                        sizeof(ngx_event_debug_t)) == NGX_ERROR)
ngx_event_debug_t  255 event/ngx_event_accept.c         ngx_event_debug_t   *dc;