Merge IO v2 branch to bleeding edge

runtime/bin/socket_linux.cc

 // Copyright (c) 2013, 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 <errno.h>  // NOLINT
 #include <stdio.h>  // NOLINT
 #include <stdlib.h>  // NOLINT
@@ skipping 186 matching lines @@
                                         intptr_t backlog) {
   intptr_t fd;
   struct sockaddr_in server_address;
 
   in_addr_t s_addr = inet_addr(host);
   if (s_addr == INADDR_NONE) {
     return -5;
   }
 
   fd = TEMP_FAILURE_RETRY(socket(AF_INET, SOCK_STREAM, 0));
-  if (fd < 0) {
-    Log::PrintErr("Error CreateBind: %s\n", strerror(errno));
-    return -1;
-  }
+  if (fd < 0) return -1;
 
   FDUtils::SetCloseOnExec(fd);
 
   int optval = 1;
   TEMP_FAILURE_RETRY(
       setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval)));
 
   server_address.sin_family = AF_INET;
   server_address.sin_port = htons(port);
   server_address.sin_addr.s_addr = s_addr;
   memset(&server_address.sin_zero, 0, sizeof(server_address.sin_zero));
 
   if (TEMP_FAILURE_RETRY(
           bind(fd,
                reinterpret_cast<struct sockaddr *>(&server_address),
                sizeof(server_address))) < 0) {
     TEMP_FAILURE_RETRY(close(fd));
-    Log::PrintErr("Error Bind: %s\n", strerror(errno));
     return -1;
   }
 
-  if (TEMP_FAILURE_RETRY(listen(fd, backlog)) != 0) {
-    Log::PrintErr("Error Listen: %s\n", strerror(errno));
+  if (TEMP_FAILURE_RETRY(listen(fd, backlog > 0 ? backlog : SOMAXCONN)) != 0) {
+    TEMP_FAILURE_RETRY(close(fd));
     return -1;
   }
 
   FDUtils::SetNonBlocking(fd);
   return fd;
 }
 
 
 static bool IsTemporaryAcceptError(int error) {
   // On Linux a number of protocol errors should be treated as EAGAIN.
@@ skipping 30 matching lines @@
   int err = TEMP_FAILURE_RETRY(close(fd));
   if (err != 0) {
     const int kBufferSize = 1024;
     char error_message[kBufferSize];
     strerror_r(errno, error_message, kBufferSize);
     Log::PrintErr("%s\n", error_message);
   }
 }
 
 #endif  // defined(TARGET_OS_LINUX)