54 lines
1.5 KiB
Rust
54 lines
1.5 KiB
Rust
//! Runtime services
|
|
//!
|
|
//! The `rt` module provides a narrow set of runtime services,
|
|
//! including the global heap (exported in `heap`) and unwinding and
|
|
//! backtrace support. The APIs in this module are highly unstable,
|
|
//! and should be considered as private implementation details for the
|
|
//! time being.
|
|
|
|
#![unstable(
|
|
feature = "rt",
|
|
reason = "this public module should not exist and is highly likely \
|
|
to disappear",
|
|
issue = "none"
|
|
)]
|
|
#![doc(hidden)]
|
|
|
|
// Re-export some of our utilities which are expected by other crates.
|
|
pub use crate::panicking::{begin_panic, begin_panic_fmt, panic_count};
|
|
|
|
// To reduce the generated code of the new `lang_start`, this function is doing
|
|
// the real work.
|
|
#[cfg(not(test))]
|
|
fn lang_start_internal(
|
|
main: &(dyn Fn() -> i32 + Sync + crate::panic::RefUnwindSafe),
|
|
argc: isize,
|
|
argv: *const *const u8,
|
|
) -> isize {
|
|
use crate::panic;
|
|
use crate::sys_common;
|
|
|
|
// SAFETY: Only called once during runtime initialization.
|
|
unsafe { sys_common::rt::init(argc, argv) };
|
|
|
|
let exit_code = panic::catch_unwind(main);
|
|
|
|
sys_common::rt::cleanup();
|
|
|
|
exit_code.unwrap_or(101) as isize
|
|
}
|
|
|
|
#[cfg(not(test))]
|
|
#[lang = "start"]
|
|
fn lang_start<T: crate::process::Termination + 'static>(
|
|
main: fn() -> T,
|
|
argc: isize,
|
|
argv: *const *const u8,
|
|
) -> isize {
|
|
lang_start_internal(
|
|
&move || crate::sys_common::backtrace::__rust_begin_short_backtrace(main).report(),
|
|
argc,
|
|
argv,
|
|
)
|
|
}
|