mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-17 19:14:16 +00:00
53 lines
1.4 KiB
Rust
53 lines
1.4 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
// This time we're testing repeatedly going up and down both stacks to
|
|
// make sure the stack pointers are maintained properly in both
|
|
// directions
|
|
|
|
use std::libc;
|
|
use std::task;
|
|
|
|
mod rustrt {
|
|
use std::libc;
|
|
|
|
extern {
|
|
pub fn rust_dbg_call(cb: extern "C" fn(libc::uintptr_t) -> libc::uintptr_t,
|
|
data: libc::uintptr_t)
|
|
-> libc::uintptr_t;
|
|
}
|
|
}
|
|
|
|
extern fn cb(data: libc::uintptr_t) -> libc::uintptr_t {
|
|
if data == 1u {
|
|
data
|
|
} else {
|
|
count(data - 1u) + count(data - 1u)
|
|
}
|
|
}
|
|
|
|
#[fixed_stack_segment] #[inline(never)]
|
|
fn count(n: uint) -> uint {
|
|
unsafe {
|
|
info!("n = {}", n);
|
|
rustrt::rust_dbg_call(cb, n)
|
|
}
|
|
}
|
|
|
|
pub fn main() {
|
|
// Make sure we're on a task with small Rust stacks (main currently
|
|
// has a large stack)
|
|
do task::spawn {
|
|
let result = count(12u);
|
|
info!("result = {}", result);
|
|
assert_eq!(result, 2048u);
|
|
};
|
|
}
|