ignore more unsupported tests

tokio/tests/fs_file.rs

@@ -1,6 +1,6 @@
 #![warn(rust_2018_idioms)]
 #![cfg(all(feature = "full", not(tokio_wasi)))] // Wasi does not support file operations
-#![cfg(not(miri))] // Miri doesn't support opening file with non-default mode (inside NamedTempFile::new)
+#![cfg(not(miri))] // Miri doesn't support creating file with non-default mode (inside NamedTempFile::new): https://github.com/rust-lang/miri/pull/2720
 
 use std::io::prelude::*;
 use tempfile::NamedTempFile;

tokio/tests/io_fill_buf.rs

@@ -1,6 +1,6 @@
 #![warn(rust_2018_idioms)]
 #![cfg(all(feature = "full", not(tokio_wasi)))] // Wasi does not support file operations
-#![cfg(not(miri))] // Miri doesn't support opening file with non-default mode (inside NamedTempFile::new)
+#![cfg(not(miri))] // Miri doesn't support creating file with non-default mode (inside NamedTempFile::new): https://github.com/rust-lang/miri/pull/2720
 
 use tempfile::NamedTempFile;
 use tokio::fs::File;

tokio/tests/macros_rename_test.rs

@@ -1,4 +1,5 @@
 #![cfg(all(feature = "full", not(tokio_wasi)))] // Wasi doesn't support threading
+#![cfg(not(miri))] // Miri doesn't support write to event (inside mio::waker::Waker::wake)
 
 #[allow(unused_imports)]
 use std as tokio;

tokio/tests/rt_basic.rs

@@ -1,5 +1,6 @@
 #![warn(rust_2018_idioms)]
 #![cfg(feature = "full")]
+#![cfg(not(miri))] // Miri doesn't support write to event (inside mio::waker::Waker::wake)
 
 use tokio::runtime::Runtime;
 use tokio::sync::oneshot;
@@ -45,7 +46,6 @@ fn spawned_task_does_not_progress_without_block_on() {
 }
 
 #[test]
-#[cfg_attr(miri, ignore)] // Miri doesn't support write to event (inside mio::waker::Waker::wake)
 fn no_extra_poll() {
     use pin_project_lite::pin_project;
     use std::pin::Pin;
@@ -114,7 +114,6 @@ fn no_extra_poll() {
 }
 
 #[test]
-#[cfg_attr(miri, ignore)] // Miri doesn't support write to event (inside mio::waker::Waker::wake)
 fn acquire_mutex_in_drop() {
     use futures::future::pending;
     use tokio::task;
@@ -151,7 +150,6 @@ fn acquire_mutex_in_drop() {
 }
 
 #[test]
-#[cfg_attr(miri, ignore)] // Miri doesn't support write to event (inside mio::waker::Waker::wake)
 fn drop_tasks_in_context() {
     static SUCCESS: AtomicBool = AtomicBool::new(false);
 

tokio/tests/rt_common.rs

@@ -1,6 +1,7 @@
 #![allow(clippy::needless_range_loop)]
 #![warn(rust_2018_idioms)]
 #![cfg(feature = "full")]
+#![cfg(not(miri))] // Miri doesn't support epoll_wait
 
 // Tests to run on both current-thread & multi-thread runtime variants.
 
@@ -106,7 +107,6 @@ rt_test! {
 
     #[cfg(not(target_os="wasi"))]
     #[test]
-    #[cfg_attr(miri, ignore)] // Miri doesn't support epoll_wait
     fn block_on_async() {
         let rt = rt();
 
@@ -607,7 +607,6 @@ rt_test! {
 
     #[cfg(not(target_os="wasi"))] // Wasi does not support threads
     #[test]
-    #[cfg_attr(miri, ignore)] // Miri doesn't support epoll_wait
     fn always_active_parker() {
         // This test it to show that we will always have
         // an active parker even if we call block_on concurrently

tokio/tests/rt_handle_block_on.rs

@@ -1,5 +1,6 @@
 #![warn(rust_2018_idioms)]
 #![cfg(feature = "full")]
+#![cfg(not(miri))] // Miri doesn't support epoll_wait
 
 // All io tests that deal with shutdown is currently ignored because there are known bugs in with
 // shutting down the io driver while concurrently registering new resources. See

tokio/tests/rt_threaded.rs

@@ -1,5 +1,6 @@
 #![warn(rust_2018_idioms)]
 #![cfg(all(feature = "full", not(tokio_wasi)))]
+#![cfg(not(miri))] // Miri doesn't support epoll_wait
 
 use tokio::io::{AsyncReadExt, AsyncWriteExt};
 use tokio::net::{TcpListener, TcpStream};

tokio/tests/sync_mpsc.rs

@@ -275,6 +275,7 @@ async fn send_recv_buffer_limited() {
 }
 
 #[maybe_tokio_test]
+#[cfg_attr(miri, ignore)] // Miri doesn't support write to event (inside mio::waker::Waker::wake)
 async fn recv_close_gets_none_idle() {
     let (tx, mut rx) = mpsc::channel::<i32>(10);
 
@@ -287,6 +288,7 @@ async fn recv_close_gets_none_idle() {
 
 #[tokio::test]
 #[cfg(feature = "full")]
+#[cfg_attr(miri, ignore)] // Miri doesn't support write to event (inside mio::waker::Waker::wake)
 async fn recv_close_gets_none_reserved() {
     let (tx1, mut rx) = mpsc::channel::<i32>(1);
     let tx2 = tx1.clone();
@@ -525,6 +527,7 @@ async fn ready_close_cancel_bounded() {
 
 #[tokio::test]
 #[cfg(feature = "full")]
+#[cfg_attr(miri, ignore)] // Miri doesn't support write to event (inside mio::waker::Waker::wake)
 async fn permit_available_not_acquired_close() {
     let (tx1, mut rx) = mpsc::channel::<()>(1);
     let tx2 = tx1.clone();
@@ -625,6 +628,7 @@ fn try_recv_close_while_empty_unbounded() {
 
 #[tokio::test(start_paused = true)]
 #[cfg(feature = "full")]
+#[cfg_attr(miri, ignore)] // Miri doesn't support write to event (inside mio::waker::Waker::wake)
 async fn recv_timeout() {
     use tokio::sync::mpsc::error::SendTimeoutError::{Closed, Timeout};
     use tokio::time::Duration;

tokio/tests/sync_rwlock.rs

@@ -174,6 +174,7 @@ async fn write_order() {
 // A single RwLock is contested by tasks in multiple threads
 #[cfg(all(feature = "full", not(tokio_wasi)))] // Wasi doesn't support threads
 #[tokio::test(flavor = "multi_thread", worker_threads = 8)]
+#[cfg_attr(miri, ignore)] // Miri doesn't support epoll_wait
 async fn multithreaded() {
     use futures::stream::{self, StreamExt};
     use std::sync::Arc;

tokio/tests/task_local.rs

@@ -1,5 +1,7 @@
 #![cfg(all(feature = "full", not(tokio_wasi)))] // Wasi doesn't support threads
 #![allow(clippy::declare_interior_mutable_const)]
+#![cfg(not(miri))] // Miri doesn't support write to event (inside mio::waker::Waker::wake)
+
 use std::future::Future;
 use std::pin::Pin;
 use std::task::{Context, Poll};