diff options
Diffstat (limited to 'src/test/ui/abi/extern/extern-call-indirect.rs')
-rw-r--r-- | src/test/ui/abi/extern/extern-call-indirect.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/ui/abi/extern/extern-call-indirect.rs b/src/test/ui/abi/extern/extern-call-indirect.rs new file mode 100644 index 000000000..886e8f6be --- /dev/null +++ b/src/test/ui/abi/extern/extern-call-indirect.rs @@ -0,0 +1,35 @@ +// run-pass +// ignore-wasm32-bare no libc to test ffi with + +#![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 { fact(data - 1) * data } +} + +fn fact(n: libc::uintptr_t) -> libc::uintptr_t { + unsafe { + println!("n = {}", n); + rustrt::rust_dbg_call(cb, n) + } +} + +pub fn main() { + let result = fact(10); + println!("result = {}", result); + assert_eq!(result, 3628800); +} |