win: Capture some CRITICAL_SECTION debugging data

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 31 matching lines @@
     //!     points and is ready to service requests.
     virtual void ExceptionHandlerServerStarted() = 0;
 
     //! \brief Called when the client has signalled that it has encountered an
     //!     exception and so wants a crash dump to be taken.
     //!
     //! \param[in] process A handle to the client process. Ownership of the
     //!     lifetime of this handle is not passed to the delegate.
     //! \param[in] exception_information_address The address in the client's
     //!     address space of an ExceptionInformation structure.
+    //! \param[in] debug_critical_section_address The address in the client's
+    //!     address space of a `CRITICAL_SECTION` allocated with a valid
+    //!     `.DebugInfo` field, or `0` if unavailable.
     //! \return The exit code that should be used when terminating the client
     //!     process.
     virtual unsigned int ExceptionHandlerServerException(
         HANDLE process,
-        WinVMAddress exception_information_address) = 0;
+        WinVMAddress exception_information_address,
+        WinVMAddress debug_critical_section_address) = 0;
   };
 
   //! \brief Constructs the exception handling server.
   ExceptionHandlerServer();
   ~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.
@@ skipping 17 matching lines @@
 
   base::Lock clients_lock_;
   std::set<internal::ClientData*> clients_;
 
   DISALLOW_COPY_AND_ASSIGN(ExceptionHandlerServer);
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_WIN_EXCEPTION_HANDLER_SERVER_H_