win: Capture some CRITICAL_SECTION debugging data

util/win/exception_handler_server.h

Index: util/win/exception_handler_server.h
diff --git a/util/win/exception_handler_server.h b/util/win/exception_handler_server.h
index 69466f84f8d4423c19765e7c549ddfea6edd9278..8e676ad65391896ac52cf5c4f352927493669970 100644
--- a/util/win/exception_handler_server.h
+++ b/util/win/exception_handler_server.h
@@ -49,11 +49,15 @@ class ExceptionHandlerServer {
     //!     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.

[Mark Mentovai, 2015/10/15 19:37:59]

`.DebugInfo` here too.

[scottmg, 2015/10/15 20:06:41]

Done.

     //! \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.