blob: 254b89ba0840febbe1daa9edfbe277beaf3ed64d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
(* TEST
include systhreads;
hassysthreads;
{
bytecode;
}{
native;
}
*)
module Atomic = struct
let make = ref
let set = (:=)
let get = (!)
end
let arr = [| 1; 2; 3 |]
let[@inline never] bounds r =
(* r is live across a bounds check failure *)
try arr.(42) with
| _ -> !r
let glob = ref (ref 0)
let () =
let go = Atomic.make true in
let gcthread =
Thread.create (fun () ->
while Atomic.get go do Thread.yield (); Gc.minor (); done) ()
in
while (Gc.quick_stat ()).minor_collections < 1000 do
let r = ref 42 in
glob := r; (* force promotion *)
let n = bounds r in
if n <> 42 then Printf.printf "%x <> 42!\n%!" n;
done;
Atomic.set go false;
Thread.join gcthread
|
