chore: test more features with Miri

Author: taiki-e

.github/workflows/ci.yml

@@ -202,10 +202,7 @@ jobs:
           components: miri
       - uses: Swatinem/rust-cache@v1
       - name: miri
-        # Many of tests in tokio/tests and doctests use #[tokio::test] or
-        # #[tokio::main] that calls epoll_create1 that Miri does not support.
-        run: cargo miri test --features full --lib --no-fail-fast
-        working-directory: tokio
+        run: cargo miri test --features full --workspace --no-fail-fast
         env:
           MIRIFLAGS: -Zmiri-disable-isolation -Zmiri-strict-provenance -Zmiri-retag-fields
           PROPTEST_CASES: 10

tokio/src/process/unix/orphan.rs

@@ -291,7 +291,6 @@ pub(crate) mod test {
         drop(signal_guard);
     }
 
-    #[cfg_attr(miri, ignore)] // Miri does not support epoll.
     #[test]
     fn does_not_register_signal_if_queue_empty() {
         let (io_driver, io_handle) = IoDriver::new(1024).unwrap();