Fix error-checking when calling timerfd_create.

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 "platform/globals.h"
 #if defined(TARGET_OS_LINUX)
 
 #include "bin/eventhandler.h"
 
 #include <errno.h>  // NOLINT
@@ skipping 46 matching lines @@
   }
 }
 
 
 EventHandlerImplementation::EventHandlerImplementation() : shutdown_(false) {
   // The initial size passed to epoll_create is ignore on newer (>=
   // 2.6.8) Linux versions
   static const int kEpollInitialSize = 64;
   epoll_fd_ = TEMP_FAILURE_RETRY(epoll_create(kEpollInitialSize));
   if (epoll_fd_ == -1) {
-    FATAL("Failed creating epoll file descriptor");
+    FATAL1("Failed creating epoll file descriptor: %i", errno);
   }
   FDUtils::SetCloseOnExec(epoll_fd_);
   timer_fd_ = TEMP_FAILURE_RETRY(timerfd_create(CLOCK_REALTIME, TFD_CLOEXEC));
-  if (epoll_fd_ == -1) {
-    FATAL("Failed creating timerfd file descriptor");
+  if (timer_fd_ == -1) {
+    FATAL1("Failed creating timerfd file descriptor: %i", errno);
   }
   // Register the timer_fd_ with the epoll instance.
   struct epoll_event event;
   event.events = EPOLLIN;
   event.data.u64 = ILLEGAL_PORT;  // Use ILLEGAL_PORT to identify timer-fd.
   int status = TEMP_FAILURE_RETRY(epoll_ctl(epoll_fd_,
                                             EPOLL_CTL_ADD,
                                             timer_fd_,
                                             &event));
   if (status == -1) {
@@ skipping 149 matching lines @@
       // Add to epoll - this is the first time we see it.
       AddToEpollInstance(epoll_fd_, id, dart_port, data);
     }
   }
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_LINUX)