bjoernager/rust
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Parse unsafe attributes

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This commit is contained in:
carbotaniuman 2024-04-20 23:54:50 -05:00
parent 76e7a0849c
commit 67f5dd1ef1
19 changed files with 173 additions and 27 deletions
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56
compiler/rustc_feature/src/builtin_attrs.rs
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@ -59,6 +59,17 @@ pub enum AttributeType {
CrateLevel,
}
#[derive(Copy, Clone, PartialEq, Debug)]
#[allow(dead_code)]
pub enum AttributeSafety {
/// Normal attribute that does not need `#[unsafe(...)]`
Normal,
/// Unsafe attribute that requires safety obligations
/// to be discharged
Unsafe,
}
#[derive(Clone, Copy)]
pub enum AttributeGate {
/// Is gated by a given feature gate, reason
@ -177,6 +188,18 @@ macro_rules! ungated {
name: sym::$attr,
encode_cross_crate: $encode_cross_crate,
type_: $typ,
safety: AttributeSafety::Normal,
template: $tpl,
gate: Ungated,
duplicates: $duplicates,
}
};
(unsafe $attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr $(,)?) => {
BuiltinAttribute {
name: sym::$attr,
encode_cross_crate: $encode_cross_crate,
type_: $typ,
safety: AttributeSafety::Unsafe,
template: $tpl,
gate: Ungated,
duplicates: $duplicates,
@ -190,6 +213,7 @@ macro_rules! gated {
name: sym::$attr,
encode_cross_crate: $encode_cross_crate,
type_: $typ,
safety: AttributeSafety::Normal,
template: $tpl,
duplicates: $duplicates,
gate: Gated(Stability::Unstable, sym::$gate, $msg, cfg_fn!($gate)),
@ -200,6 +224,29 @@ macro_rules! gated {
name: sym::$attr,
encode_cross_crate: $encode_cross_crate,
type_: $typ,
safety: AttributeSafety::Normal,
template: $tpl,
duplicates: $duplicates,
gate: Gated(Stability::Unstable, sym::$attr, $msg, cfg_fn!($attr)),
}
};
(unsafe $attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $gate:ident, $msg:expr $(,)?) => {
BuiltinAttribute {
name: sym::$attr,
encode_cross_crate: $encode_cross_crate,
type_: $typ,
safety: AttributeSafety::Unsafe,
template: $tpl,
duplicates: $duplicates,
gate: Gated(Stability::Unstable, sym::$gate, $msg, cfg_fn!($gate)),
}
};
(unsafe $attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $msg:expr $(,)?) => {
BuiltinAttribute {
name: sym::$attr,
encode_cross_crate: $encode_cross_crate,
type_: $typ,
safety: AttributeSafety::Unsafe,
template: $tpl,
duplicates: $duplicates,
gate: Gated(Stability::Unstable, sym::$attr, $msg, cfg_fn!($attr)),
@ -228,6 +275,7 @@ macro_rules! rustc_attr {
name: sym::$attr,
encode_cross_crate: $encode_cross_crate,
type_: $typ,
safety: AttributeSafety::Normal,
template: $tpl,
duplicates: $duplicates,
gate: Gated(Stability::Unstable, sym::rustc_attrs, $msg, cfg_fn!(rustc_attrs)),
@ -258,6 +306,7 @@ pub struct BuiltinAttribute {
/// Otherwise, it can only be used in the local crate.
pub encode_cross_crate: EncodeCrossCrate,
pub type_: AttributeType,
pub safety: AttributeSafety,
pub template: AttributeTemplate,
pub duplicates: AttributeDuplicates,
pub gate: AttributeGate,
@ -375,9 +424,9 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
),
ungated!(no_link, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No),
ungated!(repr, Normal, template!(List: "C"), DuplicatesOk, EncodeCrossCrate::No),
ungated!(export_name, Normal, template!(NameValueStr: "name"), FutureWarnPreceding, EncodeCrossCrate::No),
ungated!(link_section, Normal, template!(NameValueStr: "name"), FutureWarnPreceding, EncodeCrossCrate::No),
ungated!(no_mangle, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No),
ungated!(unsafe export_name, Normal, template!(NameValueStr: "name"), FutureWarnPreceding, EncodeCrossCrate::No),
ungated!(unsafe link_section, Normal, template!(NameValueStr: "name"), FutureWarnPreceding, EncodeCrossCrate::No),
ungated!(unsafe no_mangle, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No),
ungated!(used, Normal, template!(Word, List: "compiler|linker"), WarnFollowing, EncodeCrossCrate::No),
ungated!(link_ordinal, Normal, template!(List: "ordinal"), ErrorPreceding, EncodeCrossCrate::Yes),
@ -850,6 +899,7 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
// FIXME: This can be `true` once we always use `tcx.is_diagnostic_item`.
encode_cross_crate: EncodeCrossCrate::Yes,
type_: Normal,
safety: AttributeSafety::Normal,
template: template!(NameValueStr: "name"),
duplicates: ErrorFollowing,
gate: Gated(