53 lines
1.5 KiB
Rust
53 lines
1.5 KiB
Rust
//! 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(
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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 = "none"
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)]
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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 crate::panicking::{begin_panic, begin_panic_fmt, 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(
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main: &(dyn Fn() -> i32 + Sync + crate::panic::RefUnwindSafe),
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argc: isize,
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argv: *const *const u8,
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) -> isize {
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use crate::panic;
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use crate::sys_common;
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// SAFETY: Only called once during runtime initialization.
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unsafe { sys_common::rt::init(argc, argv) };
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let exit_code = panic::catch_unwind(main);
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sys_common::rt::cleanup();
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exit_code.unwrap_or(101) as isize
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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: crate::process::Termination + 'static>(
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main: fn() -> T,
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argc: isize,
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argv: *const *const u8,
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) -> isize {
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lang_start_internal(
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&move || crate::sys_common::backtrace::__rust_begin_short_backtrace(main).report(),
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argc,
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argv,
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)
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}
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