Major rework of vm service events.

runtime/vm/message_handler.h

 // Copyright (c) 2011, 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.
 
 #ifndef VM_MESSAGE_HANDLER_H_
 #define VM_MESSAGE_HANDLER_H_
 
 #include "vm/isolate.h"
 #include "vm/message.h"
 #include "vm/os_thread.h"
@@ skipping 63 matching lines @@
     return pause_on_start_;
   }
 
   void set_pause_on_start(bool pause_on_start) {
     pause_on_start_ = pause_on_start;
   }
 
   bool paused_on_start() const {
     // If pause_on_start_ is still set, tell the user we are paused,
     // even if we haven't hit the pause point yet.
-    return pause_on_start_;
+    return paused_on_start_;
   }
 
   bool pause_on_exit() const {
     return pause_on_exit_;
   }
 
   void set_pause_on_exit(bool pause_on_exit) {
     pause_on_exit_ = pause_on_exit;
   }
 
@@ skipping 42 matching lines @@
   // ------------ END PortMap API ------------
 
   // Custom message notification.  Optionally provided by subclass.
   virtual void MessageNotify(Message::Priority priority);
 
   // Handles a single message.  Provided by subclass.
   //
   // Returns true on success.
   virtual bool HandleMessage(Message* message) = 0;
 
+  virtual void NotifyPauseOnStart() {}
+  virtual void NotifyPauseOnExit() {}
+
  private:
   friend class PortMap;
   friend class MessageHandlerTestPeer;
   friend class MessageHandlerTask;
 
   // Called by MessageHandlerTask to process our task queue.
   void TaskCallback();
 
   // Dequeue the next message.  Prefer messages from the oob_queue_ to
   // messages from the queue_.
   Message* DequeueMessage(Message::Priority min_priority);
 
   // Handles any pending messages.
   bool HandleMessages(bool allow_normal_messages,
                       bool allow_multiple_normal_messages);
 
   Monitor monitor_;  // Protects all fields in MessageHandler.
   MessageQueue* queue_;
   MessageQueue* oob_queue_;
   intptr_t live_ports_;  // The number of open ports, including control ports.
   intptr_t paused_;  // The number of pause messages received.
   bool pause_on_start_;
   bool pause_on_exit_;
+  bool paused_on_start_;
   bool paused_on_exit_;
   ThreadPool* pool_;
   ThreadPool::Task* task_;
   StartCallback start_callback_;
   EndCallback end_callback_;
   CallbackData callback_data_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageHandler);
 };
 
 }  // namespace dart
 
 #endif  // VM_MESSAGE_HANDLER_H_