feat: Deadlock detector thread

src/main/deadlock.rs

@@ -0,0 +1,36 @@
+use std::{thread, time::Duration};
+
+/// Runs a loop that checks for deadlocks every 10 seconds.
+///
+/// Note that this requires the `deadlock_detection` parking_lot feature to be
+/// enabled.
+pub(crate) fn deadlock_detection_thread() {
+	loop {
+		thread::sleep(Duration::from_secs(10));
+		let deadlocks = parking_lot::deadlock::check_deadlock();
+		if deadlocks.is_empty() {
+			continue;
+		}
+
+		eprintln!("{} deadlocks detected", deadlocks.len());
+		for (i, threads) in deadlocks.iter().enumerate() {
+			eprintln!("Deadlock #{i}");
+			for t in threads {
+				eprintln!("Thread Id {:#?}", t.thread_id());
+				eprintln!("{:#?}", t.backtrace());
+			}
+		}
+	}
+}
+
+/// Spawns the deadlock detection thread.
+///
+/// This thread will run in the background and check for deadlocks every 10
+/// seconds. When a deadlock is detected, it will print detailed information to
+/// stderr.
+pub(crate) fn spawn() {
+	thread::Builder::new()
+		.name("deadlock_detector".to_owned())
+		.spawn(deadlock_detection_thread)
+		.expect("failed to spawn deadlock detection thread");
+}