Add names to threads and tasks for easier debugging of crashes

crates/eww/src/main.rs

@@ -144,7 +144,11 @@ fn main() {
 }
 
 fn listen_for_daemon_response(mut recv: DaemonResponseReceiver) {
-    let rt = tokio::runtime::Builder::new_current_thread().enable_time().build().expect("Failed to initialize tokio runtime");
+    let rt = tokio::runtime::Builder::new_current_thread()
+        .thread_name("listen-for-daemon-response")
+        .enable_all()
+        .build()
+        .expect("Failed to initialize tokio runtime");
     rt.block_on(async {
         if let Ok(Some(response)) = tokio::time::timeout(Duration::from_millis(100), recv.recv()).await {
             println!("{}", response);

crates/eww/src/script_var_handler.rs

@@ -24,8 +24,14 @@ use yuck::config::script_var_definition::{ListenScriptVar, PollScriptVar, Script
 /// the script var execution.
 pub fn init(evt_send: UnboundedSender<DaemonCommand>) -> ScriptVarHandlerHandle {
     let (msg_send, mut msg_recv) = tokio::sync::mpsc::unbounded_channel();
-    let thread_handle = std::thread::spawn(move || {
+    let thread_handle = std::thread::Builder::new()
-        let rt = tokio::runtime::Runtime::new().expect("Failed to initialize tokio runtime for script var handlers");
+        .name("outer-script-var-handler".to_string())
+        .spawn(move || {
+            let rt = tokio::runtime::Builder::new_multi_thread()
+                .enable_all()
+                .thread_name("script-var-handler")
+                .build()
+                .expect("Failed to initialize tokio runtime for script var handlers");
             rt.block_on(async {
                 let _: Result<_> = try {
                     let mut handler = ScriptVarHandler {
@@ -49,7 +55,8 @@ pub fn init(evt_send: UnboundedSender<DaemonCommand>) -> ScriptVarHandlerHandle
                     };
                 };
             })
-    });
+        })
+        .expect("Failed to start script-var-handler thread");
     let handle = ScriptVarHandlerHandle { msg_send, thread_handle };
     handle
 }
@@ -279,15 +286,6 @@ impl ListenVarHandler {
     }
 }
 
-impl Drop for ListenVarHandler {
-    fn drop(&mut self) {
-        let rt = tokio::runtime::Runtime::new().expect("Failed to initialize tokio runtime for script var handlers");
-        rt.block_on(async {
-            self.stop_all().await;
-        });
-    }
-}
-
 async fn terminate_handle(mut child: tokio::process::Child) {
     if let Some(id) = child.id() {
         log::debug!("Killing process with id {}", id);

crates/eww/src/server.rs

@@ -116,8 +116,15 @@ pub fn initialize_server(paths: EwwPaths, action: Option<DaemonCommand>, should_
 }
 
 fn init_async_part(paths: EwwPaths, ui_send: UnboundedSender<app::DaemonCommand>) {
-    std::thread::spawn(move || {
+    std::thread::Builder::new()
-        let rt = tokio::runtime::Builder::new_multi_thread().enable_all().build().expect("Failed to initialize tokio runtime");
+        .name("outer-main-async-runtime".to_string())
+        .spawn(move || {
+            let rt = tokio::runtime::Builder::new_multi_thread()
+                .thread_name("main-async-runtime")
+                .enable_all()
+                .build()
+                .expect("Failed to initialize tokio runtime");
+
             rt.block_on(async {
                 let filewatch_join_handle = {
                     let ui_send = ui_send.clone();
@@ -147,7 +154,8 @@ fn init_async_part(paths: EwwPaths, ui_send: UnboundedSender<app::DaemonCommand>
                     log::error!("Eww exiting with error: {:?}", e);
                 }
             })
-    });
+        })
+        .expect("Failed to start outer-main-async-runtime thread");
 }
 
 /// Watch configuration files for changes, sending reload events to the eww app when the files change.

crates/eww/src/widgets/mod.rs

@@ -17,7 +17,9 @@ where
 {
     use wait_timeout::ChildExt;
     let cmd = replace_placeholders(cmd, args);
-    std::thread::spawn(move || {
+    std::thread::Builder::new()
+        .name("command-execution-thread".to_string())
+        .spawn(move || {
             log::debug!("Running command from widget: {}", cmd);
             let child = Command::new("/bin/sh").arg("-c").arg(&cmd).spawn();
             match child {
@@ -33,7 +35,8 @@ where
                 },
                 Err(err) => log::error!("Failed to launch child process: {}", err),
             }
-    });
+        })
+        .expect("Failed to start command-execution-thread");
 }
 
 fn replace_placeholders<T>(cmd: &str, args: &[T]) -> String