1 // Copyright 2013 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 //! The `rt` module provides a narrow set of runtime services,
14 //! including the global heap (exported in `heap`) and unwinding and
15 //! backtrace support. The APIs in this module are highly unstable,
16 //! and should be considered as private implementation details for the
19 #![unstable(feature = "rt",
20 reason = "this public module should not exist and is highly likely \
26 // Reexport some of our utilities which are expected by other crates.
27 pub use panicking::{begin_panic, begin_panic_fmt, update_panic_count};
31 fn lang_start(main: fn(), argc: isize, argv: *const *const u8) -> isize {
35 use sys_common::thread_info;
37 #[cfg(not(feature = "backtrace"))]
43 let main_guard = sys::thread::guard::init();
44 sys::stack_overflow::init();
46 // Next, set up the current Thread with the guard information we just
47 // created. Note that this isn't necessary in general for new threads,
48 // but we just do this to name the main thread and to give it correct
49 // info about the stack bounds.
50 let thread = Thread::new(Some("main".to_owned()));
51 thread_info::set(main_guard, thread);
53 // Store our args if necessary in a squirreled away location
54 sys::args::init(argc, argv);
56 // Let's run some code!
57 #[cfg(feature = "backtrace")]
58 let res = panic::catch_unwind(|| {
59 ::sys_common::backtrace::__rust_begin_short_backtrace(main)
61 #[cfg(not(feature = "backtrace"))]
62 let res = panic::catch_unwind(mem::transmute::<_, fn()>(main));
63 sys_common::cleanup();