Enhance the MachMessageServer test to cover large messages (MACH_RCV_LARGE)

util/mach/mach_message_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 103 matching lines @@
   //! \param[in] interface The MachMessageServerInterface that is responsible
   //!     for handling the message. Interface::MachMessageServerRequestSize() is
   //!     used as the receive size for the request message, and
   //!     Interface::MachMessageServerReplySize() is used as the
   //!     maximum size of the reply message. If \a options contains
   //!     `MACH_RCV_LARGE`, this function will retry a receive operation that
   //!     returns `MACH_RCV_TOO_LARGE` with an appropriately-sized buffer.
   //!     MachMessageServerInterface::MachMessageServerFunction() is called to
   //!     handle the request and populate the reply.
   //! \param[in] receive_port The port on which to receive the request message.
-  //! \param[in] options Options suitable for mach_msg.
+  //! \param[in] options Options suitable for mach_msg. For the defaults, use
+  //!     `MACH_MSG_OPTION_NONE`.
   //! \param[in] persistent Chooses between one-shot and persistent operation.
   //! \param[in] nonblocking Chooses between blocking and nonblocking operation.
   //! \param[in] timeout_ms When \a nonblocking is `false`, the the maximum
   //!     duration that this entire function will run, in milliseconds, or
   //!     `MACH_MSG_TIMEOUT_NONE` to specify no timeout (infinite waiting). When
   //!     \a nonblocking is `true`, this parameter has no effect. When \a
   //!     persistent is `true`, the timeout applies to the overall duration of
   //!     this function, not to any individual `mach_msg()` call.
   //!
   //! \return On success, `KERN_SUCCESS` (when \a persistent is `false`) or
@@ skipping 10 matching lines @@
                                Nonblocking nonblocking,
                                mach_msg_timeout_t timeout_ms);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(MachMessageServer);
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_MACH_MACH_MESSAGE_SERVER_H_