70 lines
2.3 KiB
Rust
70 lines
2.3 KiB
Rust
// Copyright 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.
|
|
|
|
use prelude::v1::*;
|
|
use io::prelude::*;
|
|
|
|
use any::Any;
|
|
use cell::RefCell;
|
|
use rt::{backtrace, unwind};
|
|
use sys::stdio::Stderr;
|
|
use sys_common::thread_info;
|
|
|
|
thread_local! {
|
|
pub static LOCAL_STDERR: RefCell<Option<Box<Write + Send>>> = {
|
|
RefCell::new(None)
|
|
}
|
|
}
|
|
|
|
pub fn on_panic(obj: &(Any+Send), file: &'static str, line: u32) {
|
|
let msg = match obj.downcast_ref::<&'static str>() {
|
|
Some(s) => *s,
|
|
None => match obj.downcast_ref::<String>() {
|
|
Some(s) => &s[..],
|
|
None => "Box<Any>",
|
|
}
|
|
};
|
|
let mut err = match Stderr::new() {
|
|
Ok(err) => err,
|
|
_ => return,
|
|
};
|
|
let thread = thread_info::current_thread();
|
|
let name = thread.as_ref().and_then(|t| t.name()).unwrap_or("<unnamed>");
|
|
let prev = LOCAL_STDERR.with(|s| s.borrow_mut().take());
|
|
match prev {
|
|
Some(mut stderr) => {
|
|
// FIXME: what to do when the thread printing panics?
|
|
let _ = writeln!(stderr,
|
|
"thread '{}' panicked at '{}', {}:{}\n",
|
|
name, msg, file, line);
|
|
if backtrace::log_enabled() {
|
|
let _ = backtrace::write(&mut *stderr);
|
|
}
|
|
let mut s = Some(stderr);
|
|
LOCAL_STDERR.with(|slot| {
|
|
*slot.borrow_mut() = s.take();
|
|
});
|
|
}
|
|
None => {
|
|
let _ = writeln!(&mut err, "thread '{}' panicked at '{}', {}:{}",
|
|
name, msg, file, line);
|
|
if backtrace::log_enabled() {
|
|
let _ = backtrace::write(&mut err);
|
|
}
|
|
}
|
|
}
|
|
|
|
// If this is a double panic, make sure that we printed a backtrace
|
|
// for this panic.
|
|
if unwind::panicking() && !backtrace::log_enabled() {
|
|
let _ = backtrace::write(&mut err);
|
|
}
|
|
}
|