Canon wise... if Wolverine stops breathing he doesn't die but rather goes into a coma like state (X-Men: Days of Future Past).
However, what would happen if he were to stop eating? Life cannot exist without energy, and while Logan hasn't as far as I know to be shown eating he does drink (albeit alcohol).
So would Logan die, go into a coma, or repair himself, if he were to stop eating?
Answers from any of the Marvel comics will also be accepted.