1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // This time we're testing repeatedly going up and down both stacks to
12 // make sure the stack pointers are maintained properly in both
16 use std::thread::Thread;
21 #[link(name = "rust_test_helpers")]
23 pub fn rust_dbg_call(cb: extern "C" fn(libc::uintptr_t) -> libc::uintptr_t,
24 data: libc::uintptr_t)
29 extern fn cb(data: libc::uintptr_t) -> libc::uintptr_t {
33 count(data - 1) + count(data - 1)
37 fn count(n: libc::uintptr_t) -> libc::uintptr_t {
39 println!("n = {}", n);
40 rustrt::rust_dbg_call(cb, n)
45 // Make sure we're on a task with small Rust stacks (main currently
47 let _t = Thread::spawn(move|| {
48 let result = count(12);
49 println!("result = {}", result);
50 assert_eq!(result, 2048);