The previous path google::protobuf::Message::Reflection was deprecated
in 2008 (779f61c6a3ce02a119e28e802f229e61b69b9046), and we only used
it here. With newer versions of proto-c, this breaks the build.
This is an API breaking change. Nevertheless, help text and
command-line parser were out of sync and the variant of the help-text
does make much more sense.
With the number of accessed memory addresses and the duration of the
trace, we can deduce the size of the rectangular memory fault space.
This will be used in testing.
