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// Copyright 2013 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.
use io::prelude::*;
use env;
use fmt;
use intrinsics;
use sync::atomic::{self, Ordering};
use sys::stdio::Stderr;
pub fn min_stack() -> usize {
static MIN: atomic::AtomicUsize = atomic::AtomicUsize::new(0);
match MIN.load(Ordering::SeqCst) {
0 => {}
n => return n - 1,
}
let amt = env::var("RUST_MIN_STACK").ok().and_then(|s| s.parse().ok());
let amt = amt.unwrap_or(2 * 1024 * 1024);
// 0 is our sentinel value, so ensure that we'll never see 0 after
// initialization has run
MIN.store(amt + 1, Ordering::SeqCst);
return amt;
}
// Indicates whether we should perform expensive sanity checks, including rtassert!
//
// FIXME: Once the runtime matures remove the `true` below to turn off rtassert,
// etc.
pub const ENFORCE_SANITY: bool = true || !cfg!(rtopt) || cfg!(rtdebug) ||
cfg!(rtassert);
pub fn dumb_print(args: fmt::Arguments) {
let _ = Stderr::new().map(|mut stderr| stderr.write_fmt(args));
}
pub fn abort(args: fmt::Arguments) -> ! {
rterrln!("fatal runtime error: {}", args);
unsafe { intrinsics::abort(); }
}
pub unsafe fn report_overflow() {
use thread;
rterrln!("\nthread '{}' has overflowed its stack",
thread::current().name().unwrap_or("<unknown>"));
}
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