Pass Mach message trailers to server handler functions

util/mach/child_port_server.cc

 // 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 54 matching lines @@
     : MachMessageServer::Interface(),
       interface_(interface) {
 }
 
 bool ChildPortServer::MachMessageServerFunction(
     const mach_msg_header_t* in_header,
     mach_msg_header_t* out_header,
     bool* destroy_complex_request) {
   PrepareMIGReplyFromRequest(in_header, out_header);
 
+  const mach_msg_trailer_t* in_trailer =
+      MachMessageTrailerFromHeader(in_header);
+
   switch (in_header->msgh_id) {
     case kMachMessageIDChildPortCheckIn: {
       // child_port_check_in(), handle_child_port_check_in().
       using Request = __Request__child_port_check_in_t;
       const Request* in_request = reinterpret_cast<const Request*>(in_header);
       kern_return_t kr = MIGCheckRequestChildPortCheckIn(in_request);
       if (kr != MACH_MSG_SUCCESS) {
         SetMIGReplyError(out_header, kr);
         return true;
       }
 
       using Reply = __Reply__child_port_check_in_t;
       Reply* out_reply = reinterpret_cast<Reply*>(out_header);
       out_reply->RetCode =
           interface_->HandleChildPortCheckIn(in_header->msgh_local_port,
                                              in_request->token,
                                              in_request->port.name,
                                              in_request->port.disposition,
+                                             in_trailer,
                                              destroy_complex_request);
       return true;
     }
   }
 
   SetMIGReplyError(out_header, MIG_BAD_ID);
   return false;
 }
 
 mach_msg_size_t ChildPortServer::MachMessageServerRequestSize() {
   return sizeof(__RequestUnion__handle_child_port_subsystem);
 }
 
 mach_msg_size_t ChildPortServer::MachMessageServerReplySize() {
   return sizeof(__ReplyUnion__handle_child_port_subsystem);
 }
 
 }  // namespace crashpad