morestack2.rs

// Copyright 2012-2014 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.

// ignore-test newsched transition
// error-pattern:explicit failure

// This time we're testing that the stack limits are restored
// correctly after calling into the C stack and unwinding.
// See the hack in upcall_call_shim_on_c_stack where it messes
// with the stack limit.

extern crate libc;
use std::task;

mod rustrt {
    extern crate libc;

    extern {
        pub fn rust_get_argc() -> libc::c_int;
    }
}

fn getbig_call_c_and_fail(i: int) {
    if i != 0 {
        getbig_call_c_and_fail(i - 1);
    } else {
        unsafe {
            rustrt::rust_get_argc();
            fail!();
        }
    }
}

struct and_then_get_big_again {
  x:int,
}

impl Drop for and_then_get_big_again {
    fn drop(&mut self) {
        fn getbig(i: int) {
            if i != 0 {
                getbig(i - 1);
            }
        }
        getbig(10000);
    }
}

fn and_then_get_big_again(x:int) -> and_then_get_big_again {
    and_then_get_big_again {
        x: x
    }
}

fn main() {
    task::spawn(proc() {
        let r = and_then_get_big_again(4);
        getbig_call_c_and_fail(10000);
    });
}