Changed the debugger API to allow only one debug event listener to be registe...

src/debug.h

 // Copyright 2006-2008 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
@@ skipping 354 matching lines @@
                                          Handle<Object> script_function,
                                          bool* caught_exception);
   static void OnDebugBreak(Handle<Object> break_points_hit);
   static void OnException(Handle<Object> exception, bool uncaught);
   static void OnBeforeCompile(Handle<Script> script);
   static void OnAfterCompile(Handle<Script> script,
                            Handle<JSFunction> fun);
   static void OnNewFunction(Handle<JSFunction> fun);
   static void ProcessDebugEvent(v8::DebugEvent event,
                                 Handle<Object> event_data);
+  static void SetEventListener(Handle<Object> callback, Handle<Object> data);
   static void SetMessageHandler(v8::DebugMessageHandler handler, void* data);
   static void SendMessage(Vector<uint16_t> message);
   static void ProcessCommand(Vector<const uint16_t> command);
   static void UpdateActiveDebugger();
   static Handle<Object> Call(Handle<JSFunction> fun,
                              Handle<Object> data,
                              bool* pending_exception);
 
   inline static bool EventActive(v8::DebugEvent event) {
     // Currently argument event is not used.
     return !Debugger::compiling_natives_ && Debugger::debugger_active_;
   }
 
   static void set_debugger_active(bool debugger_active) {
     Debugger::debugger_active_ = debugger_active;
   }
   static bool debugger_active() { return Debugger::debugger_active_; }
   static void set_compiling_natives(bool compiling_natives) {
     Debugger::compiling_natives_ = compiling_natives;
   }
   static bool compiling_natives() { return Debugger::compiling_natives_; }
   static void set_loading_debugger(bool v) { is_loading_debugger_ = v; }
   static bool is_loading_debugger() { return Debugger::is_loading_debugger_; }
 
  private:
+  static Handle<Object> event_listener_;  // Global handle to listener
+  static Handle<Object> event_listener_data_;
   static bool debugger_active_;  // Are there any active debugger?
   static bool compiling_natives_;  // Are we compiling natives?
   static bool is_loading_debugger_;  // Are we loading the debugger?
   static DebugMessageThread* message_thread_;
   static v8::DebugMessageHandler debug_message_handler_;
   static void* debug_message_handler_data_;
 };
 
 
 // A Queue of Vector<uint16_t> objects.  A thread-safe version is
@@ skipping 184 matching lines @@
   }
  private:
   Debug::AddressId id_;
   int reg_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8_DEBUG_H_