1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 #ifndef V8_DEBUG_AGENT_H_ 29 #define V8_DEBUG_AGENT_H_ 30 31 #ifdef ENABLE_DEBUGGER_SUPPORT 32 #include "../include/v8-debug.h" 33 #include "platform.h" 34 35 namespace v8 { 36 namespace internal { 37 38 // Forward decelrations. 39 class DebuggerAgentSession; 40 41 42 // Debugger agent which starts a socket listener on the debugger port and 43 // handles connection from a remote debugger. 44 class DebuggerAgent: public Thread { 45 public: DebuggerAgent(const char * name,int port)46 explicit DebuggerAgent(const char* name, int port) 47 : name_(StrDup(name)), port_(port), 48 server_(OS::CreateSocket()), terminate_(false), 49 session_access_(OS::CreateMutex()), session_(NULL), 50 terminate_now_(OS::CreateSemaphore(0)), 51 listening_(OS::CreateSemaphore(0)) { 52 ASSERT(instance_ == NULL); 53 instance_ = this; 54 } ~DebuggerAgent()55 ~DebuggerAgent() { 56 instance_ = NULL; 57 delete server_; 58 } 59 60 void Shutdown(); 61 void WaitUntilListening(); 62 63 private: 64 void Run(); 65 void CreateSession(Socket* socket); 66 void DebuggerMessage(const v8::Debug::Message& message); 67 void CloseSession(); 68 void OnSessionClosed(DebuggerAgentSession* session); 69 70 SmartPointer<const char> name_; // Name of the embedding application. 71 int port_; // Port to use for the agent. 72 Socket* server_; // Server socket for listen/accept. 73 bool terminate_; // Termination flag. 74 Mutex* session_access_; // Mutex guarging access to session_. 75 DebuggerAgentSession* session_; // Current active session if any. 76 Semaphore* terminate_now_; // Semaphore to signal termination. 77 Semaphore* listening_; 78 79 static DebuggerAgent* instance_; 80 81 friend class DebuggerAgentSession; 82 friend void DebuggerAgentMessageHandler(const v8::Debug::Message& message); 83 84 DISALLOW_COPY_AND_ASSIGN(DebuggerAgent); 85 }; 86 87 88 // Debugger agent session. The session receives requests from the remote 89 // debugger and sends debugger events/responses to the remote debugger. 90 class DebuggerAgentSession: public Thread { 91 public: DebuggerAgentSession(DebuggerAgent * agent,Socket * client)92 DebuggerAgentSession(DebuggerAgent* agent, Socket* client) 93 : agent_(agent), client_(client) {} 94 95 void DebuggerMessage(Vector<uint16_t> message); 96 void Shutdown(); 97 98 private: 99 void Run(); 100 101 void DebuggerMessage(Vector<char> message); 102 103 DebuggerAgent* agent_; 104 Socket* client_; 105 106 DISALLOW_COPY_AND_ASSIGN(DebuggerAgentSession); 107 }; 108 109 110 // Utility methods factored out to be used by the D8 shell as well. 111 class DebuggerAgentUtil { 112 public: 113 static const char* kContentLength; 114 static int kContentLengthSize; 115 116 static SmartPointer<char> ReceiveMessage(const Socket* conn); 117 static bool SendConnectMessage(const Socket* conn, 118 const char* embedding_host); 119 static bool SendMessage(const Socket* conn, const Vector<uint16_t> message); 120 static bool SendMessage(const Socket* conn, 121 const v8::Handle<v8::String> message); 122 static int ReceiveAll(const Socket* conn, char* data, int len); 123 }; 124 125 } } // namespace v8::internal 126 127 #endif // ENABLE_DEBUGGER_SUPPORT 128 129 #endif // V8_DEBUG_AGENT_H_ 130