1 files changed, 59 insertions, 0 deletions
diff --git a/tests/run-make-fulldeps/foreign-exceptions/foo.rs b/tests/run-make-fulldeps/foreign-exceptions/foo.rs
new file mode 100644
index 00000000000..dd3b7c76f28
--- /dev/null
+++ b/tests/run-make-fulldeps/foreign-exceptions/foo.rs
@@ -0,0 +1,59 @@
+// 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();
+}