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miri: disable test_downgrade_observe test on macOS

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This commit is contained in:
Ralf Jung 2024-11-25 08:00:22 +01:00
parent 4e4c20d2ab
commit c9b56b9694
1 changed files with 4 additions and 1 deletions
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5
library/std/src/sync/rwlock/tests.rs
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@ -511,12 +511,15 @@ fn test_downgrade_basic() {
}
#[test]
// FIXME: On macOS we use a provenance-incorrect implementation and Miri catches that issue.
// See <https://github.com/rust-lang/rust/issues/121950> for details.
#[cfg_attr(all(miri, target_os = "macos"), ignore)]
fn test_downgrade_observe() {
// Taken from the test `test_rwlock_downgrade` from:
// https://github.com/Amanieu/parking_lot/blob/master/src/rwlock.rs
const W: usize = 20;
const N: usize = 100;
const N: usize = if cfg!(miri) { 40 } else { 100 };
// This test spawns `W` writer threads, where each will increment a counter `N` times, ensuring
// that the value they wrote has not changed after downgrading.