mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-25 00:03:43 +00:00
46 lines
1.1 KiB
Rust
46 lines
1.1 KiB
Rust
// run-pass
|
|
#![allow(unused_must_use)]
|
|
// This time we're testing repeatedly going up and down both stacks to
|
|
// make sure the stack pointers are maintained properly in both
|
|
// directions
|
|
|
|
// ignore-emscripten no threads support
|
|
#![feature(rustc_private)]
|
|
|
|
extern crate libc;
|
|
use std::thread;
|
|
|
|
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) + count(data - 1) }
|
|
}
|
|
|
|
fn count(n: libc::uintptr_t) -> libc::uintptr_t {
|
|
unsafe {
|
|
println!("n = {}", n);
|
|
rustrt::rust_dbg_call(cb, n)
|
|
}
|
|
}
|
|
|
|
pub fn main() {
|
|
// Make sure we're on a thread with small Rust stacks (main currently
|
|
// has a large stack)
|
|
thread::spawn(move || {
|
|
let result = count(12);
|
|
println!("result = {}", result);
|
|
assert_eq!(result, 2048);
|
|
})
|
|
.join();
|
|
}
|