Make socket send and receive more robust and return 0 on failure.

src/platform-posix.cc

-// Copyright 2011 the V8 project authors. All rights reserved.
+// Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
@@ skipping 448 matching lines @@
     int status = shutdown(socket_, SHUT_RDWR);
     close(socket_);
     socket_ = -1;
     return status == 0;
   }
   return true;
 }
 
 
 int POSIXSocket::Send(const char* data, int len) const {
+  if (len <= 0) return 0;
   int status = send(socket_, data, len, 0);
-  return status;
+  return (status < 0) ? 0 : status;
 }
 
 
 int POSIXSocket::Receive(char* data, int len) const {
+  if (len <= 0) return 0;
   int status = recv(socket_, data, len, 0);
-  return status;
+  return (status < 0) ? 0 : status;
 }
 
 
 bool POSIXSocket::SetReuseAddress(bool reuse_address) {
   int on = reuse_address ? 1 : 0;
   int status = setsockopt(socket_, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
   return status == 0;
 }
 
 
@@ skipping 27 matching lines @@
   return ntohl(value);
 }
 
 
 Socket* OS::CreateSocket() {
   return new POSIXSocket();
 }
 
 
 } }  // namespace v8::internal