blob: dd3b7c76f28675b8d0d77321f9607193fe843119 (
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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
// Tests that C++ exceptions can unwind through Rust code run destructors and
// are caught by catch_unwind. Also tests that Rust panics can unwind through
// C++ code.
#![feature(c_unwind)]
use std::panic::{catch_unwind, AssertUnwindSafe};
struct DropCheck<'a>(&'a mut bool);
impl<'a> Drop for DropCheck<'a> {
fn drop(&mut self) {
println!("DropCheck::drop");
*self.0 = true;
}
}
extern "C" {
fn test_cxx_exception();
}
extern "C-unwind" {
fn cxx_catch_callback(cb: extern "C-unwind" fn(), ok: *mut bool);
}
#[no_mangle]
extern "C-unwind" fn rust_catch_callback(cb: extern "C-unwind" fn(), rust_ok: &mut bool) {
let _drop = DropCheck(rust_ok);
cb();
unreachable!("should have unwound instead of returned");
}
fn test_rust_panic() {
extern "C-unwind" fn callback() {
println!("throwing rust panic");
panic!(1234i32);
}
let mut dropped = false;
let mut cxx_ok = false;
let caught_unwind = catch_unwind(AssertUnwindSafe(|| {
let _drop = DropCheck(&mut dropped);
unsafe {
cxx_catch_callback(callback, &mut cxx_ok);
}
unreachable!("should have unwound instead of returned");
}));
println!("caught rust panic");
assert!(dropped);
assert!(caught_unwind.is_err());
let panic_obj = caught_unwind.unwrap_err();
let panic_int = *panic_obj.downcast_ref::<i32>().unwrap();
assert_eq!(panic_int, 1234);
assert!(cxx_ok);
}
fn main() {
unsafe { test_cxx_exception() };
test_rust_panic();
}
|
