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Commit | Line | Data |
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b7449926 | 1 | // run-pass |
0bf4aa26 | 2 | #![allow(unused_must_use)] |
223e47cc LB |
3 | // This time we're testing repeatedly going up and down both stacks to |
4 | // make sure the stack pointers are maintained properly in both | |
5 | // directions | |
6 | ||
7453a54e SL |
7 | // ignore-emscripten no threads support |
8 | ||
0731742a | 9 | #![feature(rustc_private)] |
c34b1796 | 10 | |
1a4d82fc | 11 | extern crate libc; |
c34b1796 | 12 | use std::thread; |
970d7e83 | 13 | |
223e47cc | 14 | mod rustrt { |
1a4d82fc | 15 | extern crate libc; |
970d7e83 | 16 | |
476ff2be | 17 | #[link(name = "rust_test_helpers", kind = "static")] |
1a4d82fc JJ |
18 | extern { |
19 | pub fn rust_dbg_call(cb: extern "C" fn(libc::uintptr_t) -> libc::uintptr_t, | |
20 | data: libc::uintptr_t) | |
970d7e83 | 21 | -> libc::uintptr_t; |
223e47cc LB |
22 | } |
23 | } | |
24 | ||
25 | extern fn cb(data: libc::uintptr_t) -> libc::uintptr_t { | |
1a4d82fc | 26 | if data == 1 { |
223e47cc LB |
27 | data |
28 | } else { | |
1a4d82fc | 29 | count(data - 1) + count(data - 1) |
223e47cc LB |
30 | } |
31 | } | |
32 | ||
1a4d82fc | 33 | fn count(n: libc::uintptr_t) -> libc::uintptr_t { |
223e47cc | 34 | unsafe { |
1a4d82fc | 35 | println!("n = {}", n); |
223e47cc LB |
36 | rustrt::rust_dbg_call(cb, n) |
37 | } | |
38 | } | |
39 | ||
40 | pub fn main() { | |
bd371182 | 41 | // Make sure we're on a thread with small Rust stacks (main currently |
223e47cc | 42 | // has a large stack) |
9346a6ac | 43 | thread::spawn(move|| { |
1a4d82fc JJ |
44 | let result = count(12); |
45 | println!("result = {}", result); | |
46 | assert_eq!(result, 2048); | |
9346a6ac | 47 | }).join(); |
223e47cc | 48 | } |