]> git.lizzy.rs Git - rust.git/blob - src/tools/miri/tests/fail/concurrency/libc_pthread_join_multiple.rs
Rollup merge of #100823 - WaffleLapkin:less_offsets, r=scottmcm
[rust.git] / src / tools / miri / tests / fail / concurrency / libc_pthread_join_multiple.rs
1 //@ignore-target-windows: No libc on Windows
2
3 // Joining the same thread from multiple threads is undefined behavior.
4
5 use std::thread;
6 use std::{mem, ptr};
7
8 extern "C" fn thread_start(_null: *mut libc::c_void) -> *mut libc::c_void {
9     // Yield the thread several times so that other threads can join it.
10     thread::yield_now();
11     thread::yield_now();
12     ptr::null_mut()
13 }
14
15 fn main() {
16     unsafe {
17         let mut native: libc::pthread_t = mem::zeroed();
18         let attr: libc::pthread_attr_t = mem::zeroed();
19         // assert_eq!(libc::pthread_attr_init(&mut attr), 0); FIXME: this function is not yet implemented.
20         assert_eq!(libc::pthread_create(&mut native, &attr, thread_start, ptr::null_mut()), 0);
21         let mut native_copy: libc::pthread_t = mem::zeroed();
22         ptr::copy_nonoverlapping(&native, &mut native_copy, 1);
23         let handle = thread::spawn(move || {
24             assert_eq!(libc::pthread_join(native_copy, ptr::null_mut()), 0); //~ ERROR: Undefined Behavior: trying to join an already joined thread
25         });
26         assert_eq!(libc::pthread_join(native, ptr::null_mut()), 0);
27         handle.join().unwrap();
28     }
29 }