rust/src/test/run-fail/bug-2470-bounds-check-overflow.rs
Huon Wilson 4c79b22ef2 std::vec: remove .as_imm_buf, replaced by .as_ptr & .len.
There's no need for the restrictions of a closure with the above methods.
2013-12-19 09:26:13 +11:00

36 lines
1.2 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.
// error-pattern:index out of bounds
use std::mem;
fn main() {
// This should cause a bounds-check failure, but may not if we do our
// bounds checking by comparing the scaled index to the vector's
// address-bounds, since we've scaled the index to wrap around to the
// address of the 0th cell in the array (even though the index is
// huge).
let x = ~[1u,2u,3u];
let base = x.as_ptr() as uint;
let idx = base / mem::size_of::<uint>();
error!("ov1 base = 0x{:x}", base);
error!("ov1 idx = 0x{:x}", idx);
error!("ov1 sizeof::<uint>() = 0x{:x}", mem::size_of::<uint>());
error!("ov1 idx * sizeof::<uint>() = 0x{:x}",
idx * mem::size_of::<uint>());
// This should fail.
error!("ov1 0x{:x}", x[idx]);
}