tests/ui/panics/panic-handler-chain-update-hook.rs

   1 // run-pass
   2 // needs-unwind
   3 #![allow(stable_features)]
   4
   5 // ignore-emscripten no threads support
   6
   7 #![feature(std_panic)]
   8 #![feature(panic_update_hook)]
   9
  10 use std::sync::atomic::{AtomicUsize, Ordering};
  11 use std::panic;
  12 use std::thread;
  13
  14 static A: AtomicUsize = AtomicUsize::new(0);
  15 static B: AtomicUsize = AtomicUsize::new(0);
  16 static C: AtomicUsize = AtomicUsize::new(0);
  17
  18 fn main() {
  19     panic::set_hook(Box::new(|_| { A.fetch_add(1, Ordering::SeqCst); }));
  20     panic::update_hook(|prev, info| {
  21         B.fetch_add(1, Ordering::SeqCst);
  22         prev(info);
  23     });
  24     panic::update_hook(|prev, info| {
  25         C.fetch_add(1, Ordering::SeqCst);
  26         prev(info);
  27     });
  28
  29     let _ = thread::spawn(|| {
  30         panic!();
  31     }).join();
  32
  33     assert_eq!(1, A.load(Ordering::SeqCst));
  34     assert_eq!(1, B.load(Ordering::SeqCst));
  35     assert_eq!(1, C.load(Ordering::SeqCst));
  36 }