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Diffstat (limited to '')
-rw-r--r-- | vendor/crossbeam-channel/tests/thread_locals.rs | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/vendor/crossbeam-channel/tests/thread_locals.rs b/vendor/crossbeam-channel/tests/thread_locals.rs new file mode 100644 index 000000000..effb6a143 --- /dev/null +++ b/vendor/crossbeam-channel/tests/thread_locals.rs @@ -0,0 +1,53 @@ +//! Tests that make sure accessing thread-locals while exiting the thread doesn't cause panics. + +#![cfg(not(miri))] // error: abnormal termination: the evaluated program aborted execution + +use std::thread; +use std::time::Duration; + +use crossbeam_channel::{select, unbounded}; +use crossbeam_utils::thread::scope; + +fn ms(ms: u64) -> Duration { + Duration::from_millis(ms) +} + +#[test] +#[cfg_attr(target_os = "macos", ignore = "TLS is destroyed too early on macOS")] +fn use_while_exiting() { + struct Foo; + + impl Drop for Foo { + fn drop(&mut self) { + // A blocking operation after the thread-locals have been dropped. This will attempt to + // use the thread-locals and must not panic. + let (_s, r) = unbounded::<()>(); + select! { + recv(r) -> _ => {} + default(ms(100)) => {} + } + } + } + + thread_local! { + static FOO: Foo = Foo; + } + + let (s, r) = unbounded::<()>(); + + scope(|scope| { + scope.spawn(|_| { + // First initialize `FOO`, then the thread-locals related to crossbeam-channel. + FOO.with(|_| ()); + r.recv().unwrap(); + // At thread exit, thread-locals related to crossbeam-channel get dropped first and + // `FOO` is dropped last. + }); + + scope.spawn(|_| { + thread::sleep(ms(100)); + s.send(()).unwrap(); + }); + }) + .unwrap(); +} |