names for event-loop threads and host-resolver thread

source/event_loop.c

@@ -124,13 +124,17 @@ static struct aws_event_loop_group *s_event_loop_group_new(
 
             struct aws_event_loop_options options = {
                 .clock = clock,
+                .thread_options = &thread_options,
             };
 
             if (pin_threads) {
                 thread_options.cpu_id = usable_cpus[i].cpu_id;
-                options.thread_options = &thread_options;
             }
 
+            char thread_name[16] = {0};
+            snprintf(thread_name, sizeof(thread_name), "aws-io %d/%d", (int)i+1, (int)el_count);
+            thread_options.name = aws_byte_cursor_from_c_str(thread_name);
+
             struct aws_event_loop *loop = new_loop_fn(alloc, &options, new_loop_user_data);
 
             if (!loop) {

source/host_resolver.c

@@ -1359,6 +1359,7 @@ static inline int create_and_init_host_entry(
 
     struct aws_thread_options thread_options = *aws_default_thread_options();
     thread_options.join_strategy = AWS_TJS_MANAGED;
+    thread_options.name = aws_byte_cursor_from_c_str("aws-dns");
 
     aws_thread_launch(&new_host_entry->resolver_thread, resolver_thread_fn, new_host_entry, &thread_options);
     ++default_host_resolver->pending_host_entry_shutdown_completion_callbacks;