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//@compile-flags: -Zmiri-genmc -Zmiri-disable-stacked-borrows
//@revisions: release1 release2
// Translated from GenMC's test "2+2W+3sc+rel1" and "2+2W+3sc+rel2" (two variants that swap which store is `Release`).
//
// The pass tests "2w2w_3sc_1rel.rs", "2w2w_4rel" and "2w2w_4sc" and the fail test "2w2w_weak.rs" are related.
// Check "2w2w_weak.rs" for a more detailed description.
#![no_main]
#[path = "../../../utils/genmc.rs"]
mod genmc;
use std::sync::atomic::AtomicU64;
use std::sync::atomic::Ordering::*;
use crate::genmc::*;
static X: AtomicU64 = AtomicU64::new(0);
static Y: AtomicU64 = AtomicU64::new(0);
#[unsafe(no_mangle)]
fn miri_start(_argc: isize, _argv: *const *const u8) -> isize {
unsafe {
let ids = [
spawn_pthread_closure(|| {
X.store(1, SeqCst);
Y.store(2, SeqCst);
}),
// Variant 1: `Release` goes first.
#[cfg(release1)]
spawn_pthread_closure(|| {
Y.store(1, Release);
X.store(2, SeqCst);
}),
// Variant 2: `Release` goes second.
#[cfg(not(release1))]
spawn_pthread_closure(|| {
Y.store(1, SeqCst);
X.store(2, Release);
}),
];
// Join so we can read the final values.
join_pthreads(ids);
// Check that we don't get any unexpected values:
let result = (X.load(Relaxed), Y.load(Relaxed));
if !matches!(result, (1, 2) | (1, 1) | (2, 2) | (2, 1)) {
std::process::abort();
}
0
}
}
|
