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Support new #[rustc_intrinsic] attribute and fallback bodies

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This commit is contained in:
Lukas Wirth 2024-11-03 16:29:35 +01:00
parent 78f3112626
commit 36d68c5d0f
9 changed files with 143 additions and 174 deletions
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22
crates/hir-ty/src/utils.rs
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@ -259,25 +259,25 @@ pub fn is_fn_unsafe_to_call(db: &dyn HirDatabase, func: FunctionId) -> bool {
return true;
}
let is_intrinsic = db.attrs(func.into()).by_key(&sym::rustc_intrinsic).exists()
|| data.abi.as_ref() == Some(&sym::rust_dash_intrinsic);
let loc = func.lookup(db.upcast());
match loc.container {
hir_def::ItemContainerId::ExternBlockId(block) => {
// Function in an `extern` block are always unsafe to call, except when
// it is marked as `safe` or it has `"rust-intrinsic"` ABI there are a
// few exceptions.
let id = block.lookup(db.upcast()).id;
let is_intrinsic =
id.item_tree(db.upcast())[id.value].abi.as_ref() == Some(&sym::rust_dash_intrinsic);
if is_intrinsic {
if is_intrinsic || {
let id = block.lookup(db.upcast()).id;
id.item_tree(db.upcast())[id.value].abi.as_ref() == Some(&sym::rust_dash_intrinsic)
} {
// Intrinsics are unsafe unless they have the rustc_safe_intrinsic attribute
!data.attrs.by_key(&sym::rustc_safe_intrinsic).exists()
!db.attrs(func.into()).by_key(&sym::rustc_safe_intrinsic).exists()
} else {
// Extern items without `safe` modifier are always unsafe
// Function in an `extern` block are always unsafe to call, except when
// it is marked as `safe`.
!data.is_safe()
}
}
_ if is_intrinsic => !db.attrs(func.into()).by_key(&sym::rustc_safe_intrinsic).exists(),
_ => false,
}
}