Adds some error handling to the socket implementation.

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.
 
 #if !defined(DART_IO_DISABLED)
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_LINUX)
 
 #include "bin/eventhandler.h"
@@ skipping 62 matching lines @@
 }
 
 
 EventHandlerImplementation::EventHandlerImplementation()
     : socket_map_(&HashMap::SamePointerValue, 16) {
   intptr_t result;
   result = NO_RETRY_EXPECTED(pipe(interrupt_fds_));
   if (result != 0) {
     FATAL("Pipe creation failed");
   }
-  FDUtils::SetNonBlocking(interrupt_fds_[0]);
-  FDUtils::SetCloseOnExec(interrupt_fds_[0]);
-  FDUtils::SetCloseOnExec(interrupt_fds_[1]);
+  if (!FDUtils::SetNonBlocking(interrupt_fds_[0])) {
+    FATAL("Failed to set pipe fd non blocking\n");
+  }
+  if (!FDUtils::SetCloseOnExec(interrupt_fds_[0])) {
+    FATAL("Failed to set pipe fd close on exec\n");
+  }
+  if (!FDUtils::SetCloseOnExec(interrupt_fds_[1])) {
+    FATAL("Failed to set pipe fd close on exec\n");
+  }
   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_ = NO_RETRY_EXPECTED(epoll_create(kEpollInitialSize));
   if (epoll_fd_ == -1) {
     FATAL1("Failed creating epoll file descriptor: %i", errno);
   }
-  FDUtils::SetCloseOnExec(epoll_fd_);
+  if (!FDUtils::SetCloseOnExec(epoll_fd_)) {
+    FATAL("Failed to set epoll fd close on exec\n");
+  }
   // Register the interrupt_fd with the epoll instance.
   struct epoll_event event;
   event.events = EPOLLIN;
   event.data.ptr = NULL;
   int status = NO_RETRY_EXPECTED(
       epoll_ctl(epoll_fd_, EPOLL_CTL_ADD, interrupt_fds_[0], &event));
   if (status == -1) {
     FATAL("Failed adding interrupt fd to epoll instance");
   }
   timer_fd_ = NO_RETRY_EXPECTED(timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC));
@@ skipping 327 matching lines @@
   // The hashmap does not support keys with value 0.
   return dart::Utils::WordHash(fd + 1);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_LINUX)
 
 #endif  // !defined(DART_IO_DISABLED)