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Add core::arch::breakpoint and test

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Approved in [ACP 491](https://github.com/rust-lang/libs-team/issues/491).

Remove the `unsafe` on `core::intrinsics::breakpoint()`, since it's a
safe intrinsic to call and has no prerequisites.

(Thanks to @zachs18 for figuring out the `bootstrap`/`not(bootstrap)`
logic.)
This commit is contained in:
Josh Triplett 2024-12-01 19:07:13 -08:00
parent a522d78598
commit a030ffbe35
7 changed files with 63 additions and 8 deletions
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9
compiler/rustc_error_codes/src/error_codes/E0622.md
View file

@ -7,10 +7,11 @@ Erroneous code example:
#![allow(internal_features)]
extern "rust-intrinsic" {
pub static breakpoint: fn(); // error: intrinsic must be a function
pub static atomic_singlethreadfence_seqcst: fn();
// error: intrinsic must be a function
}
fn main() { unsafe { breakpoint(); } }
fn main() { unsafe { atomic_singlethreadfence_seqcst(); } }
```
An intrinsic is a function available for use in a given programming language
@ -22,8 +23,8 @@ error, just declare a function. Example:
#![allow(internal_features)]
extern "rust-intrinsic" {
pub fn breakpoint(); // ok!
pub fn atomic_singlethreadfence_seqcst(); // ok!
}
fn main() { unsafe { breakpoint(); } }
fn main() { unsafe { atomic_singlethreadfence_seqcst(); } }
```