make it easier to dbg stalls (#3351)

* make it easier to dbg

* revert channel sizes

* BAnon

polkadot/node/service/src/grandpa_support.rs

@@ -130,11 +130,14 @@ impl<B> grandpa::VotingRule<PolkadotBlock, B> for ApprovalCheckingVotingRule
 		Box::pin(async move {
 			let (tx, rx) = oneshot::channel();
 			let approval_checking_subsystem_vote = {
-				overseer.send_msg(ApprovalVotingMessage::ApprovedAncestor(
-					best_hash,
-					base_number,
-					tx,
-				)).await;
+				overseer.send_msg(
+					ApprovalVotingMessage::ApprovedAncestor(
+						best_hash,
+						base_number,
+						tx,
+					),
+					std::any::type_name::<Self>(),
+				).await;
 
 				rx.await.ok().and_then(|v| v)
 			};

polkadot/node/service/src/relay_chain_selection.rs

@@ -216,7 +216,10 @@ impl<B> SelectChain<PolkadotBlock> for SelectRelayChain<B>
 
 		self.overseer
 			.clone()
-			.send_msg(ChainSelectionMessage::Leaves(tx)).await;
+			.send_msg(
+				ChainSelectionMessage::Leaves(tx),
+				std::any::type_name::<Self>(),
+			).await;
 
 		rx.await
 			.map_err(Error::OverseerDisconnected)
@@ -264,7 +267,10 @@ impl<B> SelectChain<PolkadotBlock> for SelectRelayChain<B>
 
 		let subchain_head = {
 			let (tx, rx) = oneshot::channel();
-			overseer.send_msg(ChainSelectionMessage::BestLeafContaining(target_hash, tx)).await;
+			overseer.send_msg(
+				ChainSelectionMessage::BestLeafContaining(target_hash, tx),
+				std::any::type_name::<Self>(),
+			).await;
 
 			let best = rx.await
 				.map_err(Error::OverseerDisconnected)
@@ -318,11 +324,14 @@ impl<B> SelectChain<PolkadotBlock> for SelectRelayChain<B>
 		let (subchain_head, subchain_number) = {
 
 			let (tx, rx) = oneshot::channel();
-			overseer.send_msg(ApprovalVotingMessage::ApprovedAncestor(
-				subchain_head,
-				target_number,
-				tx,
-			)).await;
+			overseer.send_msg(
+				ApprovalVotingMessage::ApprovedAncestor(
+					subchain_head,
+					target_number,
+					tx,
+				),
+				std::any::type_name::<Self>(),
+			).await;
 
 			match rx.await
 				.map_err(Error::OverseerDisconnected)