win: Implement CrashpadClient::StartHandler()

util/win/exception_handler_server.h

 // Copyright 2015 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 46 matching lines @@
     virtual unsigned int ExceptionHandlerServerException(
         HANDLE process,
         WinVMAddress exception_information_address,
         WinVMAddress debug_critical_section_address) = 0;
   };
 
   //! \brief Constructs the exception handling server.
   //!
   //! \param[in] pipe_name The name of the pipe to listen on. Must be of the
   //!     form "\\.\pipe\<some_name>".
-  explicit ExceptionHandlerServer(const std::string& pipe_name);
+  //! \param[in] persistent `true` if Run() should not return until Stop() is
+  //!     called. If `false`, Run() will return when all clients have exited,
+  //!     although Run() will always wait for the first client to connect.
+  ExceptionHandlerServer(const std::string& pipe_name, bool persistent);
 
   ~ExceptionHandlerServer();
 
   //! \brief Runs the exception-handling server.
   //!
   //! \param[in] delegate The interface to which the exceptions are delegated
   //!     when they are caught in Run(). Ownership is not transferred.
   void Run(Delegate* delegate);
 
   //! \brief Stops the exception-handling server. Returns immediately. The
   //!     object must not be destroyed until Run() returns.
   void Stop();
 
  private:
   static bool ServiceClientConnection(
       const internal::PipeServiceContext& service_context);
   static DWORD __stdcall PipeServiceProc(void* ctx);
   static void __stdcall OnCrashDumpEvent(void* ctx, BOOLEAN);
   static void __stdcall OnNonCrashDumpEvent(void* ctx, BOOLEAN);
   static void __stdcall OnProcessEnd(void* ctx, BOOLEAN);
 
   std::string pipe_name_;
   ScopedKernelHANDLE port_;
 
   base::Lock clients_lock_;
   std::set<internal::ClientData*> clients_;
 
+  bool persistent_;
+
   DISALLOW_COPY_AND_ASSIGN(ExceptionHandlerServer);
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_WIN_EXCEPTION_HANDLER_SERVER_H_