Pass Mach message trailers to server handler functions

util/mach/child_port_server.h

 // Copyright 2014 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 17 matching lines @@
  public:
   //! \brief An interface that the request message that is a part of the
   //!     `child_port` Mach subsystem can be dispatched to.
   class Interface {
    public:
     //! \brief Handles check-ins sent by `child_port_check_in()`.
     //!
     //! This behaves equivalently to a `handle_child_port_check_in()` function
     //! used with `child_port_server()`.
     //!
+    //! \param[in] trailer The trailer received with the request message.
     //! \param[out] destroy_request `true` if the request message is to be
     //!     destroyed even when this method returns success. See
     //!     MachMessageServer::Interface.
     virtual kern_return_t HandleChildPortCheckIn(
         child_port_server_t server,
         const child_port_token_t token,
         mach_port_t port,
         mach_msg_type_name_t right_type,
+        const mach_msg_trailer_t* trailer,
         bool* destroy_complex_request) = 0;
 
    protected:
     ~Interface() {}
   };
 
   //! \brief Constructs an object of this class.
   //!
   //! \param[in] interface The interface to dispatch requests to. Weak.
   explicit ChildPortServer(Interface* interface);
 
   // MachMessageServer::Interface:
 
   bool MachMessageServerFunction(const mach_msg_header_t* in_header,
                                  mach_msg_header_t* out_header,
                                  bool* destroy_complex_request) override;
 
   mach_msg_size_t MachMessageServerRequestSize() override;
   mach_msg_size_t MachMessageServerReplySize() override;
 
  private:
   Interface* interface_;  // weak
 
   DISALLOW_COPY_AND_ASSIGN(ChildPortServer);
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_MACH_CHILD_PORT_SERVER_H_