91 lines
3.3 KiB
Rust
91 lines
3.3 KiB
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Runtime services
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//!
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//! The `rt` module provides a narrow set of runtime services,
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//! including the global heap (exported in `heap`) and unwinding and
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//! backtrace support. The APIs in this module are highly unstable,
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//! and should be considered as private implementation details for the
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//! time being.
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#![unstable(feature = "rt",
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reason = "this public module should not exist and is highly likely \
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to disappear",
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issue = "0")]
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#![doc(hidden)]
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// Re-export some of our utilities which are expected by other crates.
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pub use panicking::{begin_panic, begin_panic_fmt, update_panic_count};
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// To reduce the generated code of the new `lang_start`, this function is doing
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// the real work.
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#[cfg(not(test))]
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fn lang_start_internal(main: &(Fn() -> i32 + Sync + ::panic::RefUnwindSafe),
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argc: isize, argv: *const *const u8) -> isize {
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use panic;
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use sys;
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use sys_common;
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use sys_common::thread_info;
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use thread::Thread;
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sys::init();
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unsafe {
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let main_guard = sys::thread::guard::init();
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sys::stack_overflow::init();
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// Next, set up the current Thread with the guard information we just
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// created. Note that this isn't necessary in general for new threads,
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// but we just do this to name the main thread and to give it correct
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// info about the stack bounds.
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let thread = Thread::new(Some("main".to_owned()));
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thread_info::set(main_guard, thread);
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// Store our args if necessary in a squirreled away location
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sys::args::init(argc, argv);
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// Let's run some code!
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#[cfg(feature = "backtrace")]
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let exit_code = panic::catch_unwind(|| {
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::sys_common::backtrace::__rust_begin_short_backtrace(move || main())
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});
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#[cfg(not(feature = "backtrace"))]
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let exit_code = panic::catch_unwind(move || main());
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sys_common::cleanup();
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exit_code.unwrap_or(101) as isize
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}
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}
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#[cfg(not(test))]
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#[lang = "start"]
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fn lang_start<T: ::process::Termination + 'static>
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(main: fn() -> T, argc: isize, argv: *const *const u8) -> isize
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{
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lang_start_internal(&move || main().report(), argc, argv)
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}
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/// Function used for reverting changes to the main stack before setrlimit().
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/// This is POSIX (non-Linux) specific and unlikely to be directly stabilized.
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#[unstable(feature = "rustc_stack_internals", issue = "0")]
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pub unsafe fn deinit_stack_guard() {
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::sys::thread::guard::deinit();
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}
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/// Function used for resetting the main stack guard address after setrlimit().
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/// This is POSIX specific and unlikely to be directly stabilized.
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#[unstable(feature = "rustc_stack_internals", issue = "0")]
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pub unsafe fn update_stack_guard() {
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let main_guard = ::sys::thread::guard::init();
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::sys_common::thread_info::reset_guard(main_guard);
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}
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