src/debug-agent.h

// Copyright 2006-2008 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
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#ifndef V8_V8_DEBUG_AGENT_H_
#define V8_V8_DEBUG_AGENT_H_

#include "../include/v8-debug.h"
#include "platform.h"

namespace v8 { namespace internal {


// Forward decelrations.
class DebuggerAgentSession;


// Debugger agent which starts a socket listener on the debugger port and
// handles connection from a remote debugger.
class DebuggerAgent: public Thread {
 public:
  explicit DebuggerAgent(int port)
      : port_(port), server_(OS::CreateSocket()), terminate_(false),
        session_access_(OS::CreateMutex()), session_(NULL) {}
  ~DebuggerAgent() {}

  void Shutdown();

 private:
  void Run();
  void CreateSession(Socket* socket);
  void DebuggerMessage(const uint16_t* message, int length);
  void SessionClosed(DebuggerAgentSession* session);

  int port_;  // Port to use for the agent.
  Socket* server_;  // Server socket for listen/accept.
  bool terminate_;  // Termination flag.
  Mutex* session_access_;  // Mutex guarging access to session_.
  DebuggerAgentSession* session_;  // Current active session if any.

  friend class DebuggerAgentSession;
  friend void DebuggerAgentMessageHandler(const uint16_t* message, int length,
                                          void *data);

  DISALLOW_COPY_AND_ASSIGN(DebuggerAgent);
};


// Debugger agent session. The session receives requests from the remote
// debugger and sends debugger events/responses to the remote debugger.
class DebuggerAgentSession: public Thread {
 public:
  DebuggerAgentSession(DebuggerAgent* agent, Socket* client)
      : agent_(agent), client_(client) {}

  void DebuggerMessage(Vector<uint16_t> message);

 private:
  void Run();

  void DebuggerMessage(Vector<char> message);

  DebuggerAgent* agent_;
  const Socket* client_;

  DISALLOW_COPY_AND_ASSIGN(DebuggerAgentSession);
};


// Utility methods factored out to be used by the D8 shell as well.
class DebuggerAgentUtil {
 public:
  static const char* kContentLength;
  static int kContentLengthSize;

  static SmartPointer<char> ReceiveMessage(const Socket* conn);
  static bool SendMessage(const Socket* conn, const Vector<uint16_t> message);
  static bool SendMessage(const Socket* conn,
                          const v8::Handle<v8::String> message);
  static int ReceiveAll(const Socket* conn, char* data, int len);
};


} }  // namespace v8::internal

#endif  // V8_V8_DEBUG_AGENT_H_