Adds some error handling to the socket implementation.

runtime/bin/eventhandler_macos.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_MACOS)
 
 #include "bin/eventhandler.h"
@@ skipping 87 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;
 
   kqueue_fd_ = NO_RETRY_EXPECTED(kqueue());
   if (kqueue_fd_ == -1) {
     FATAL("Failed creating kqueue");
   }
-  FDUtils::SetCloseOnExec(kqueue_fd_);
+  if (!FDUtils::SetCloseOnExec(kqueue_fd_)) {
+    FATAL("Failed to set kqueue fd close on exec\n");
+  }
   // Register the interrupt_fd with the kqueue.
   struct kevent event;
   EV_SET(&event, interrupt_fds_[0], EVFILT_READ, EV_ADD, 0, 0, NULL);
   int status = NO_RETRY_EXPECTED(kevent(kqueue_fd_, &event, 1, NULL, 0, NULL));
   if (status == -1) {
     const int kBufferSize = 1024;
     char error_message[kBufferSize];
     Utils::StrError(errno, error_message, kBufferSize);
     FATAL1("Failed adding interrupt fd to kqueue: %s\n", error_message);
   }
@@ skipping 370 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_MACOS)
 
 #endif  // !defined(DART_IO_DISABLED)