1 files changed, 36 insertions, 0 deletions
diff --git a/tests/ui/abi/extern/extern-call-deep.rs b/tests/ui/abi/extern/extern-call-deep.rs
new file mode 100644
index 000000000..db5f2ca65
--- /dev/null
+++ b/tests/ui/abi/extern/extern-call-deep.rs
@@ -0,0 +1,36 @@
+// run-pass
+// ignore-wasm32-bare no libc to test ffi with
+// ignore-emscripten blows the JS stack
+
+#![feature(rustc_private)]
+
+extern crate libc;
+
+mod rustrt {
+    extern crate libc;
+
+    #[link(name = "rust_test_helpers", kind = "static")]
+    extern "C" {
+        pub fn rust_dbg_call(
+            cb: extern "C" fn(libc::uintptr_t) -> libc::uintptr_t,
+            data: libc::uintptr_t,
+        ) -> libc::uintptr_t;
+    }
+}
+
+extern "C" fn cb(data: libc::uintptr_t) -> libc::uintptr_t {
+    if data == 1 { data } else { count(data - 1) + 1 }
+}
+
+fn count(n: libc::uintptr_t) -> libc::uintptr_t {
+    unsafe {
+        println!("n = {}", n);
+        rustrt::rust_dbg_call(cb, n)
+    }
+}
+
+pub fn main() {
+    let result = count(1000);
+    println!("result = {}", result);
+    assert_eq!(result, 1000);
+}