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94 lines
3.0 KiB
94 lines
3.0 KiB
#![warn(rust_2018_idioms)]
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#![cfg(feature = "full")]
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/// Checks that a suspended task can be aborted without panicking as reported in
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/// issue #3157: <https://github.com/tokio-rs/tokio/issues/3157>.
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#[test]
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fn test_abort_without_panic_3157() {
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let rt = tokio::runtime::Builder::new_multi_thread()
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.enable_time()
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.worker_threads(1)
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.build()
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.unwrap();
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rt.block_on(async move {
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let handle = tokio::spawn(async move {
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println!("task started");
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tokio::time::sleep(std::time::Duration::new(100, 0)).await
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});
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// wait for task to sleep.
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tokio::time::sleep(std::time::Duration::new(1, 0)).await;
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handle.abort();
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let _ = handle.await;
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});
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}
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/// Checks that a suspended task can be aborted inside of a current_thread
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/// executor without panicking as reported in issue #3662:
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/// <https://github.com/tokio-rs/tokio/issues/3662>.
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#[test]
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fn test_abort_without_panic_3662() {
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::sync::Arc;
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struct DropCheck(Arc<AtomicBool>);
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impl Drop for DropCheck {
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fn drop(&mut self) {
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self.0.store(true, Ordering::SeqCst);
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}
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}
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let rt = tokio::runtime::Builder::new_current_thread()
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.build()
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.unwrap();
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rt.block_on(async move {
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let drop_flag = Arc::new(AtomicBool::new(false));
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let drop_check = DropCheck(drop_flag.clone());
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let j = tokio::spawn(async move {
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// NB: just grab the drop check here so that it becomes part of the
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// task.
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let _drop_check = drop_check;
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futures::future::pending::<()>().await;
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});
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let drop_flag2 = drop_flag.clone();
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let task = std::thread::spawn(move || {
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// This runs in a separate thread so it doesn't have immediate
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// thread-local access to the executor. It does however transition
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// the underlying task to be completed, which will cause it to be
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// dropped (in this thread no less).
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assert!(!drop_flag2.load(Ordering::SeqCst));
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j.abort();
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// TODO: is this guaranteed at this point?
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// assert!(drop_flag2.load(Ordering::SeqCst));
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j
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})
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.join()
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.unwrap();
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assert!(drop_flag.load(Ordering::SeqCst));
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let result = task.await;
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assert!(result.unwrap_err().is_cancelled());
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// Note: We do the following to trigger a deferred task cleanup.
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//
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// The relevant piece of code you want to look at is in:
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// `Inner::block_on` of `basic_scheduler.rs`.
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//
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// We cause the cleanup to happen by having a poll return Pending once
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// so that the scheduler can go into the "auxilliary tasks" mode, at
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// which point the task is removed from the scheduler.
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let i = tokio::spawn(async move {
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tokio::task::yield_now().await;
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});
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i.await.unwrap();
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});
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}
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