Add what to validate to the name of the verification threads

Author: Seulgi Kim

core/src/verification/queue/kind.rs

@@ -67,6 +67,8 @@ pub trait Kind: 'static + Sized + Send + Sync {
     /// The third stage: completely verified.
     type Verified: Sized + Send + BlockLike + MemUsage;
 
+    fn name() -> &'static str;
+
     /// Attempt to create the `Unverified` item from the input.
     fn create(input: Self::Input, engine: &CodeChainEngine) -> Result<Self::Unverified, Error>;
 
@@ -115,6 +117,10 @@ pub mod headers {
         type Unverified = Header;
         type Verified = Header;
 
+        fn name() -> &'static str {
+            "Headers"
+        }
+
         fn create(input: Self::Input, engine: &CodeChainEngine) -> Result<Self::Unverified, Error> {
             // FIXME: this doesn't seem to match with full block verification
             verify_header_basic(&input)?;
@@ -157,6 +163,10 @@ pub mod blocks {
         type Unverified = Unverified;
         type Verified = PreverifiedBlock;
 
+        fn name() -> &'static str {
+            "Blocks"
+        }
+
         fn create(input: Self::Input, engine: &CodeChainEngine) -> Result<Self::Unverified, Error> {
             match verify_block_basic(&input.header, &input.bytes)
                 .and_then(|_| verify_header_with_engine(&input.header, engine))

core/src/verification/queue/mod.rs

@@ -162,7 +162,7 @@ impl<K: Kind> VerificationQueue<K> {
             let deleting = Arc::clone(&deleting);
 
             let handle = thread::Builder::new()
-                .name(format!("Verifier #{}", i))
+                .name(format!("{} Verifier #{}", K::name(), i))
                 .spawn(move || {
                     VerificationQueue::verify(
                         &verification,