Handle stdio redirection in standalone VM

runtime/bin/eventhandler_linux.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "bin/eventhandler.h"
 
 #include <errno.h>
 #include <pthread.h>
 #include <stdio.h>
 #include <string.h>
 #include <sys/epoll.h>
+#include <sys/stat.h>
 #include <sys/time.h>
 #include <unistd.h>
 
 #include "bin/dartutils.h"
 #include "bin/fdutils.h"
 #include "bin/hashmap.h"
 #include "platform/utils.h"
 
 
 int64_t GetCurrentTimeMilliseconds() {
@@ skipping 58 matching lines @@
                                             sd->fd(),
                                             &event));
     } else {
       status = TEMP_FAILURE_RETRY(epoll_ctl(epoll_fd_,
                                             EPOLL_CTL_ADD,
                                             sd->fd(),
                                             &event));
       sd->set_tracked_by_epoll(true);
     }
     if (status == -1) {
-      FATAL("Failed updating epoll instance");
+      FATAL1("Failed updating epoll instance: %s", strerror(errno));
     }
   }
 }
 
 
 EventHandlerImplementation::EventHandlerImplementation()
     : socket_map_(&HashMap::SamePointerValue, 16) {
   intptr_t result;
   result = TEMP_FAILURE_RETRY(pipe(interrupt_fds_));
   if (result != 0) {
@@ skipping 301 matching lines @@
 void* EventHandlerImplementation::GetHashmapKeyFromFd(intptr_t fd) {
   // The hashmap does not support keys with value 0.
   return reinterpret_cast<void*>(fd + 1);
 }
 
 
 uint32_t EventHandlerImplementation::GetHashmapHashFromFd(intptr_t fd) {
   // The hashmap does not support keys with value 0.
   return dart::Utils::WordHash(fd + 1);
 }