Rework Windows process handling.

runtime/bin/eventhandler_win.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 <process.h>
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #include <mswsock.h>
@@ skipping 192 matching lines @@
 
 static unsigned int __stdcall ReadFileThread(void* args) {
   Handle* handle = reinterpret_cast<Handle*>(args);
   handle->ReadSyncCompleteAsync();
   return 0;
 }
 
 
 void Handle::ReadSyncCompleteAsync() {
   ASSERT(pending_read_ != NULL);
-  DWORD bytes_read;
+  DWORD bytes_read = 0;
   BOOL ok = ReadFile(handle_,
                      pending_read_->GetBufferStart(),
                      pending_read_->GetBufferSize(),
                      &bytes_read,
                      NULL);
   if (!ok) {
-    fprintf(stderr, "ReadFile failed %d\n", GetLastError());
+    if (GetLastError() != ERROR_BROKEN_PIPE) {
+      fprintf(stderr, "ReadFile failed %d\n", GetLastError());
+    }
     bytes_read = 0;
   }
   OVERLAPPED* overlapped = pending_read_->GetCleanOverlapped();
   ok = PostQueuedCompletionStatus(event_handler_->completion_port(),
                                   bytes_read,
                                   reinterpret_cast<ULONG_PTR>(this),
                                   overlapped);
   if (!ok) {
     FATAL("PostQueuedCompletionStatus failed");
   }
@@ skipping 652 matching lines @@
                                    reinterpret_cast<uword>(this));
   if (result != 0) {
     FATAL1("Failed to start event handler thread %d", result);
   }
 
   // Initialize Winsock32
   if (!Socket::Initialize()) {
     FATAL("Failed to initialized Windows sockets");
   }
 }