Verify integrity of JSOM messages sent to debugger client

runtime/bin/dbg_connection.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/dbg_connection.h"
 #include "bin/dbg_message.h"
 #include "bin/dartutils.h"
 #include "bin/log.h"
 #include "bin/socket.h"
 #include "bin/thread.h"
@@ skipping 122 matching lines @@
       data_length_++;
     }
     buf_[data_length_] = '\0';
     ASSERT(data_length_ < buf_length_);
   }
 }
 
 
 static bool IsValidJSON(const char* msg) {
   dart::JSONReader r(msg);
-  return r.EndOfObject() != NULL;
+  return r.CheckMessage();
 }
 
 
 DebuggerConnectionHandler::DebuggerConnectionHandler(int debug_fd)
     : debug_fd_(debug_fd), msgbuf_(NULL) {
   msgbuf_ = new MessageBuffer(debug_fd_);
 }
 
 
 DebuggerConnectionHandler::~DebuggerConnectionHandler() {
@@ skipping 277 matching lines @@
   ASSERT(singleton_handler != NULL);
   return singleton_handler;
 }
 
 
 bool DebuggerConnectionHandler::IsConnected() {
   // TODO(asiva): Support multiple debugger connections.
   // Return true if a connection has been established.
   return singleton_handler != NULL;
 }