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Auto merge of #123396 - jhpratt:rollup-oa54mh1, r=jhpratt

Browse Source 
Rollup of 5 pull requests

Successful merges:

 - #122865 (Split hir ty lowerer's error reporting code in check functions to mod errors.)
 - #122935 (rename ptr::from_exposed_addr -> ptr::with_exposed_provenance)
 - #123182 (Avoid expanding to unstable internal method)
 - #123203 (Add `Context::ext`)
 - #123380 (Improve bootstrap comments)

r? `@ghost`
`@rustbot` modify labels: rollup
This commit is contained in:
bors 2024-04-03 02:13:07 +00:00
commit b688d53a17
67 changed files with 753 additions and 486 deletions
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4
compiler/rustc_borrowck/src/type_check/mod.rs
View File

@ -2279,7 +2279,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
}
}
CastKind::PointerFromExposedAddress => {
CastKind::PointerWithExposedProvenance => {
let ty_from = op.ty(body, tcx);
let cast_ty_from = CastTy::from_ty(ty_from);
let cast_ty_to = CastTy::from_ty(*ty);
@ -2289,7 +2289,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
span_mirbug!(
self,
rvalue,
"Invalid PointerFromExposedAddress cast {:?} -> {:?}",
"Invalid PointerWithExposedProvenance cast {:?} -> {:?}",
ty_from,
ty
)

2
compiler/rustc_codegen_cranelift/src/base.rs
View File

@ -650,7 +650,7 @@ fn codegen_stmt<'tcx>(
| CastKind::FnPtrToPtr
| CastKind::PtrToPtr
| CastKind::PointerExposeAddress
| CastKind::PointerFromExposedAddress,
| CastKind::PointerWithExposedProvenance,
ref operand,
to_ty,
) => {

2
compiler/rustc_codegen_cranelift/src/intrinsics/simd.rs
View File

@ -965,7 +965,7 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
});
}
sym::simd_expose_addr | sym::simd_from_exposed_addr | sym::simd_cast_ptr => {
sym::simd_expose_addr | sym::simd_with_exposed_provenance | sym::simd_cast_ptr => {
intrinsic_args!(fx, args => (arg); intrinsic);
ret.write_cvalue_transmute(fx, arg);
}

2
compiler/rustc_codegen_llvm/src/intrinsic.rs
View File

@ -2139,7 +2139,7 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
return Ok(bx.ptrtoint(args[0].immediate(), llret_ty));
}
if name == sym::simd_from_exposed_addr {
if name == sym::simd_with_exposed_provenance {
let (out_len, out_elem) = require_simd!(ret_ty, SimdReturn);
require!(
in_len == out_len,

2
compiler/rustc_codegen_ssa/src/mir/rvalue.rs
View File

@ -509,7 +509,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
// Since int2ptr can have arbitrary integer types as input (so we have to do
// sign extension and all that), it is currently best handled in the same code
// path as the other integer-to-X casts.
| mir::CastKind::PointerFromExposedAddress => {
| mir::CastKind::PointerWithExposedProvenance => {
assert!(bx.cx().is_backend_immediate(cast));
let ll_t_out = bx.cx().immediate_backend_type(cast);
if operand.layout.abi.is_uninhabited() {

6
compiler/rustc_const_eval/src/interpret/cast.rs
View File

@ -40,9 +40,9 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
self.write_immediate(*res, dest)?;
}
CastKind::PointerFromExposedAddress => {
CastKind::PointerWithExposedProvenance => {
let src = self.read_immediate(src)?;
let res = self.pointer_from_exposed_address_cast(&src, cast_layout)?;
let res = self.pointer_with_exposed_provenance_cast(&src, cast_layout)?;
self.write_immediate(*res, dest)?;
}
@ -242,7 +242,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
Ok(ImmTy::from_scalar(self.cast_from_int_like(scalar, src.layout, cast_to.ty)?, cast_to))
}
pub fn pointer_from_exposed_address_cast(
pub fn pointer_with_exposed_provenance_cast(
&self,
src: &ImmTy<'tcx, M::Provenance>,
cast_to: TyAndLayout<'tcx>,

2
compiler/rustc_const_eval/src/transform/check_consts/check.rs
View File

@ -547,7 +547,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
Rvalue::Cast(CastKind::PointerExposeAddress, _, _) => {
self.check_op(ops::RawPtrToIntCast);
}
Rvalue::Cast(CastKind::PointerFromExposedAddress, _, _) => {
Rvalue::Cast(CastKind::PointerWithExposedProvenance, _, _) => {
// Since no pointer can ever get exposed (rejected above), this is easy to support.
}

2
compiler/rustc_const_eval/src/transform/validate.rs
View File

@ -1076,7 +1076,7 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
// FIXME(dyn-star): make sure nothing needs to be done here.
}
// FIXME: Add Checks for these
CastKind::PointerFromExposedAddress
CastKind::PointerWithExposedProvenance
| CastKind::PointerExposeAddress
| CastKind::PointerCoercion(_) => {}
CastKind::IntToInt | CastKind::IntToFloat => {

42
compiler/rustc_expand/src/build.rs
View File

@ -48,6 +48,23 @@ impl<'a> ExtCtxt<'a> {
ast::Path { span, segments, tokens: None }
}
pub fn macro_call(
&self,
span: Span,
path: ast::Path,
delim: ast::token::Delimiter,
tokens: ast::tokenstream::TokenStream,
) -> P<ast::MacCall> {
P(ast::MacCall {
path,
args: P(ast::DelimArgs {
dspan: ast::tokenstream::DelimSpan { open: span, close: span },
delim,
tokens,
}),
})
}
pub fn ty_mt(&self, ty: P<ast::Ty>, mutbl: ast::Mutability) -> ast::MutTy {
ast::MutTy { ty, mutbl }
}
@ -265,6 +282,10 @@ impl<'a> ExtCtxt<'a> {
self.expr(span, ast::ExprKind::Field(expr, field))
}
pub fn expr_macro_call(&self, span: Span, call: P<ast::MacCall>) -> P<ast::Expr> {
self.expr(span, ast::ExprKind::MacCall(call))
}
pub fn expr_binary(
&self,
sp: Span,
@ -410,16 +431,19 @@ impl<'a> ExtCtxt<'a> {
self.expr(sp, ast::ExprKind::Tup(exprs))
}
pub fn expr_fail(&self, span: Span, msg: Symbol) -> P<ast::Expr> {
self.expr_call_global(
span,
[sym::std, sym::rt, sym::begin_panic].iter().map(|s| Ident::new(*s, span)).collect(),
thin_vec![self.expr_str(span, msg)],
)
}
pub fn expr_unreachable(&self, span: Span) -> P<ast::Expr> {
self.expr_fail(span, Symbol::intern("internal error: entered unreachable code"))
self.expr_macro_call(
span,
self.macro_call(
span,
self.path_global(
span,
[sym::std, sym::unreachable].map(|s| Ident::new(s, span)).to_vec(),
),
ast::token::Delimiter::Parenthesis,
ast::tokenstream::TokenStream::default(),
),
)
}
pub fn expr_ok(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr> {

2
compiler/rustc_hir_analysis/src/check/intrinsic.rs
View File

@ -628,7 +628,7 @@ pub fn check_intrinsic_type(
| sym::simd_as
| sym::simd_cast_ptr
| sym::simd_expose_addr
| sym::simd_from_exposed_addr => (2, 0, vec![param(0)], param(1)),
| sym::simd_with_exposed_provenance => (2, 0, vec![param(0)], param(1)),
sym::simd_bitmask => (2, 0, vec![param(0)], param(1)),
sym::simd_select | sym::simd_select_bitmask => {
(2, 0, vec![param(0), param(1), param(1)], param(1))

388
compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs
View File

@ -1,6 +1,6 @@
use crate::errors::{
self, AssocTypeBindingNotAllowed, ManualImplementation, MissingTypeParams,
ParenthesizedFnTraitExpansion,
ParenthesizedFnTraitExpansion, TraitObjectDeclaredWithNoTraits,
};
use crate::fluent_generated as fluent;
use crate::hir_ty_lowering::HirTyLowerer;
@ -8,19 +8,26 @@ use crate::traits::error_reporting::report_object_safety_error;
use rustc_data_structures::fx::{FxIndexMap, FxIndexSet};
use rustc_data_structures::sorted_map::SortedMap;
use rustc_data_structures::unord::UnordMap;
use rustc_errors::MultiSpan;
use rustc_errors::{
codes::*, pluralize, struct_span_code_err, Applicability, Diag, ErrorGuaranteed,
};
use rustc_hir as hir;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::def_id::{DefId, LocalDefId};
use rustc_infer::traits::FulfillmentError;
use rustc_middle::query::Key;
use rustc_middle::ty::{self, suggest_constraining_type_param, Ty, TyCtxt, TypeVisitableExt};
use rustc_middle::ty::{self, suggest_constraining_type_param};
use rustc_middle::ty::{AdtDef, Ty, TyCtxt, TypeVisitableExt};
use rustc_middle::ty::{Binder, TraitRef};
use rustc_session::parse::feature_err;
use rustc_span::edit_distance::find_best_match_for_name;
use rustc_span::symbol::{sym, Ident};
use rustc_span::symbol::{kw, sym, Ident};
use rustc_span::BytePos;
use rustc_span::{Span, Symbol, DUMMY_SP};
use rustc_trait_selection::traits::object_safety_violations_for_assoc_item;
use rustc_trait_selection::traits::{
object_safety_violations_for_assoc_item, TraitAliasExpansionInfo,
};
impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
/// On missing type parameters, emit an E0393 error and provide a structured suggestion using
@ -1024,6 +1031,170 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
Ok(())
}
}
pub fn report_prohibit_generics_error<'a>(
&self,
segments: impl Iterator<Item = &'a hir::PathSegment<'a>> + Clone,
args_visitors: impl Iterator<Item = &'a hir::GenericArg<'a>> + Clone,
err_extend: GenericsArgsErrExtend<'_>,
) -> ErrorGuaranteed {
#[derive(PartialEq, Eq, Hash)]
enum ProhibitGenericsArg {
Lifetime,
Type,
Const,
Infer,
}
let mut prohibit_args = FxIndexSet::default();
args_visitors.for_each(|arg| {
match arg {
hir::GenericArg::Lifetime(_) => prohibit_args.insert(ProhibitGenericsArg::Lifetime),
hir::GenericArg::Type(_) => prohibit_args.insert(ProhibitGenericsArg::Type),
hir::GenericArg::Const(_) => prohibit_args.insert(ProhibitGenericsArg::Const),
hir::GenericArg::Infer(_) => prohibit_args.insert(ProhibitGenericsArg::Infer),
};
});
let types_and_spans: Vec<_> = segments
.clone()
.flat_map(|segment| {
if segment.args().args.is_empty() {
None
} else {
Some((
match segment.res {
hir::def::Res::PrimTy(ty) => {
format!("{} `{}`", segment.res.descr(), ty.name())
}
hir::def::Res::Def(_, def_id)
if let Some(name) = self.tcx().opt_item_name(def_id) =>
{
format!("{} `{name}`", segment.res.descr())
}
hir::def::Res::Err => "this type".to_string(),
_ => segment.res.descr().to_string(),
},
segment.ident.span,
))
}
})
.collect();
let this_type = match &types_and_spans[..] {
[.., _, (last, _)] => format!(
"{} and {last}",
types_and_spans[..types_and_spans.len() - 1]
.iter()
.map(|(x, _)| x.as_str())
.intersperse(", ")
.collect::<String>()
),
[(only, _)] => only.to_string(),
[] => "this type".to_string(),
};
let arg_spans: Vec<Span> = segments
.clone()
.flat_map(|segment| segment.args().args)
.map(|arg| arg.span())
.collect();
let mut kinds = Vec::with_capacity(4);
prohibit_args.iter().for_each(|arg| match arg {
ProhibitGenericsArg::Lifetime => kinds.push("lifetime"),
ProhibitGenericsArg::Type => kinds.push("type"),
ProhibitGenericsArg::Const => kinds.push("const"),
ProhibitGenericsArg::Infer => kinds.push("generic"),
});
let (kind, s) = match kinds[..] {
[.., _, last] => (
format!(
"{} and {last}",
kinds[..kinds.len() - 1]
.iter()
.map(|&x| x)
.intersperse(", ")
.collect::<String>()
),
"s",
),
[only] => (only.to_string(), ""),
[] => unreachable!("expected at least one generic to prohibit"),
};
let last_span = *arg_spans.last().unwrap();
let span: MultiSpan = arg_spans.into();
let mut err = struct_span_code_err!(
self.tcx().dcx(),
span,
E0109,
"{kind} arguments are not allowed on {this_type}",
);
err.span_label(last_span, format!("{kind} argument{s} not allowed"));
for (what, span) in types_and_spans {
err.span_label(span, format!("not allowed on {what}"));
}
generics_args_err_extend(self.tcx(), segments.clone(), &mut err, err_extend);
let reported = err.emit();
self.set_tainted_by_errors(reported);
reported
}
pub fn report_trait_object_addition_traits_error(
&self,
regular_traits: &Vec<TraitAliasExpansionInfo<'_>>,
) -> ErrorGuaranteed {
let tcx = self.tcx();
let first_trait = &regular_traits[0];
let additional_trait = &regular_traits[1];
let mut err = struct_span_code_err!(
tcx.dcx(),
additional_trait.bottom().1,
E0225,
"only auto traits can be used as additional traits in a trait object"
);
additional_trait.label_with_exp_info(
&mut err,
"additional non-auto trait",
"additional use",
);
first_trait.label_with_exp_info(&mut err, "first non-auto trait", "first use");
err.help(format!(
"consider creating a new trait with all of these as supertraits and using that \
trait here instead: `trait NewTrait: {} {{}}`",
regular_traits
.iter()
// FIXME: This should `print_sugared`, but also needs to integrate projection bounds...
.map(|t| t.trait_ref().print_only_trait_path().to_string())
.collect::<Vec<_>>()
.join(" + "),
));
err.note(
"auto-traits like `Send` and `Sync` are traits that have special properties; \
for more information on them, visit \
<https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits>",
);
let reported = err.emit();
self.set_tainted_by_errors(reported);
reported
}
pub fn report_trait_object_with_no_traits_error(
&self,
span: Span,
trait_bounds: &Vec<(Binder<'tcx, TraitRef<'tcx>>, Span)>,
) -> ErrorGuaranteed {
let tcx = self.tcx();
let trait_alias_span = trait_bounds
.iter()
.map(|&(trait_ref, _)| trait_ref.def_id())
.find(|&trait_ref| tcx.is_trait_alias(trait_ref))
.map(|trait_ref| tcx.def_span(trait_ref));
let reported =
tcx.dcx().emit_err(TraitObjectDeclaredWithNoTraits { span, trait_alias_span });
self.set_tainted_by_errors(reported);
reported
}
}
/// Emits an error regarding forbidden type binding associations
@ -1031,7 +1202,7 @@ pub fn prohibit_assoc_item_binding(
tcx: TyCtxt<'_>,
span: Span,
segment: Option<(&hir::PathSegment<'_>, Span)>,
) {
) -> ErrorGuaranteed {
tcx.dcx().emit_err(AssocTypeBindingNotAllowed {
span,
fn_trait_expansion: if let Some((segment, span)) = segment
@ -1044,7 +1215,7 @@ pub fn prohibit_assoc_item_binding(
} else {
None
},
});
})
}
pub(crate) fn fn_trait_to_string(
@ -1099,3 +1270,208 @@ pub(crate) fn fn_trait_to_string(
format!("{}<{}, Output={}>", trait_segment.ident, args, ret)
}
}
/// Used for generics args error extend.
pub enum GenericsArgsErrExtend<'tcx> {
EnumVariant {
qself: &'tcx hir::Ty<'tcx>,
assoc_segment: &'tcx hir::PathSegment<'tcx>,
adt_def: AdtDef<'tcx>,
},
OpaqueTy,
PrimTy(hir::PrimTy),
SelfTyAlias {
def_id: DefId,
span: Span,
},
SelfTyParam(Span),
TyParam(DefId),
DefVariant,
None,
}
fn generics_args_err_extend<'a>(
tcx: TyCtxt<'_>,
segments: impl Iterator<Item = &'a hir::PathSegment<'a>> + Clone,
err: &mut Diag<'_>,
err_extend: GenericsArgsErrExtend<'_>,
) {
match err_extend {
GenericsArgsErrExtend::EnumVariant { qself, assoc_segment, adt_def } => {
err.note("enum variants can't have type parameters");
let type_name = tcx.item_name(adt_def.did());
let msg = format!(
"you might have meant to specify type parameters on enum \
`{type_name}`"
);
let Some(args) = assoc_segment.args else {
return;
};
// Get the span of the generics args *including* the leading `::`.
// We do so by stretching args.span_ext to the left by 2. Earlier
// it was done based on the end of assoc segment but that sometimes
// led to impossible spans and caused issues like #116473
let args_span = args.span_ext.with_lo(args.span_ext.lo() - BytePos(2));
if tcx.generics_of(adt_def.did()).count() == 0 {
// FIXME(estebank): we could also verify that the arguments being
// work for the `enum`, instead of just looking if it takes *any*.
err.span_suggestion_verbose(
args_span,
format!("{type_name} doesn't have generic parameters"),
"",
Applicability::MachineApplicable,
);
return;
}
let Ok(snippet) = tcx.sess.source_map().span_to_snippet(args_span) else {
err.note(msg);
return;
};
let (qself_sugg_span, is_self) =
if let hir::TyKind::Path(hir::QPath::Resolved(_, path)) = &qself.kind {
// If the path segment already has type params, we want to overwrite
// them.
match &path.segments {
// `segment` is the previous to last element on the path,
// which would normally be the `enum` itself, while the last
// `_` `PathSegment` corresponds to the variant.
[
..,
hir::PathSegment {
ident, args, res: Res::Def(DefKind::Enum, _), ..
},
_,
] => (
// We need to include the `::` in `Type::Variant::<Args>`
// to point the span to `::<Args>`, not just `<Args>`.
ident
.span
.shrink_to_hi()
.to(args.map_or(ident.span.shrink_to_hi(), |a| a.span_ext)),
false,
),
[segment] => {
(
// We need to include the `::` in `Type::Variant::<Args>`
// to point the span to `::<Args>`, not just `<Args>`.
segment.ident.span.shrink_to_hi().to(segment
.args
.map_or(segment.ident.span.shrink_to_hi(), |a| a.span_ext)),
kw::SelfUpper == segment.ident.name,
)
}
_ => {
err.note(msg);
return;
}
}
} else {
err.note(msg);
return;
};
let suggestion = vec![
if is_self {
// Account for people writing `Self::Variant::<Args>`, where
// `Self` is the enum, and suggest replacing `Self` with the
// appropriate type: `Type::<Args>::Variant`.
(qself.span, format!("{type_name}{snippet}"))
} else {
(qself_sugg_span, snippet)
},
(args_span, String::new()),
];
err.multipart_suggestion_verbose(msg, suggestion, Applicability::MaybeIncorrect);
}
GenericsArgsErrExtend::PrimTy(prim_ty) => {
let name = prim_ty.name_str();
for segment in segments {
if let Some(args) = segment.args {
err.span_suggestion_verbose(
segment.ident.span.shrink_to_hi().to(args.span_ext),
format!("primitive type `{name}` doesn't have generic parameters"),
"",
Applicability::MaybeIncorrect,
);
}
}
}
GenericsArgsErrExtend::OpaqueTy => {
err.note("`impl Trait` types can't have type parameters");
}
GenericsArgsErrExtend::DefVariant => {
err.note("enum variants can't have type parameters");
}
GenericsArgsErrExtend::TyParam(def_id) => {
if let Some(span) = tcx.def_ident_span(def_id) {
let name = tcx.item_name(def_id);
err.span_note(span, format!("type parameter `{name}` defined here"));
}
}
GenericsArgsErrExtend::SelfTyParam(span) => {
err.span_suggestion_verbose(
span,
"the `Self` type doesn't accept type parameters",
"",
Applicability::MaybeIncorrect,
);
}
GenericsArgsErrExtend::SelfTyAlias { def_id, span } => {
let ty = tcx.at(span).type_of(def_id).instantiate_identity();
let span_of_impl = tcx.span_of_impl(def_id);
let def_id = match *ty.kind() {
ty::Adt(self_def, _) => self_def.did(),
_ => return,
};
let type_name = tcx.item_name(def_id);
let span_of_ty = tcx.def_ident_span(def_id);
let generics = tcx.generics_of(def_id).count();
let msg = format!("`Self` is of type `{ty}`");
if let (Ok(i_sp), Some(t_sp)) = (span_of_impl, span_of_ty) {
let mut span: MultiSpan = vec![t_sp].into();
span.push_span_label(
i_sp,
format!("`Self` is on type `{type_name}` in this `impl`"),
);
let mut postfix = "";
if generics == 0 {
postfix = ", which doesn't have generic parameters";
}
span.push_span_label(t_sp, format!("`Self` corresponds to this type{postfix}"));
err.span_note(span, msg);
} else {
err.note(msg);
}
for segment in segments {
if let Some(args) = segment.args
&& segment.ident.name == kw::SelfUpper
{
if generics == 0 {
// FIXME(estebank): we could also verify that the arguments being
// work for the `enum`, instead of just looking if it takes *any*.
err.span_suggestion_verbose(
segment.ident.span.shrink_to_hi().to(args.span_ext),
"the `Self` type doesn't accept type parameters",
"",
Applicability::MachineApplicable,
);
return;
} else {
err.span_suggestion_verbose(
segment.ident.span,
format!(
"the `Self` type doesn't accept type parameters, use the \
concrete type's name `{type_name}` instead if you want to \
specify its type parameters"
),
type_name,
Applicability::MaybeIncorrect,
);
}
}
}
}
_ => {}
}
}

357
compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs
View File

@ -14,7 +14,7 @@
//! trait references and bounds.
mod bounds;
mod errors;
pub mod errors;
pub mod generics;
mod lint;
mod object_safety;
@ -22,14 +22,14 @@ mod object_safety;
use crate::bounds::Bounds;
use crate::collect::HirPlaceholderCollector;
use crate::errors::AmbiguousLifetimeBound;
use crate::hir_ty_lowering::errors::prohibit_assoc_item_binding;
use crate::hir_ty_lowering::errors::{prohibit_assoc_item_binding, GenericsArgsErrExtend};
use crate::hir_ty_lowering::generics::{check_generic_arg_count, lower_generic_args};
use crate::middle::resolve_bound_vars as rbv;
use crate::require_c_abi_if_c_variadic;
use rustc_ast::TraitObjectSyntax;
use rustc_data_structures::fx::{FxHashSet, FxIndexMap};
use rustc_errors::{
codes::*, struct_span_code_err, Applicability, Diag, ErrorGuaranteed, FatalError, MultiSpan,
codes::*, struct_span_code_err, Applicability, Diag, ErrorGuaranteed, FatalError,
};
use rustc_hir as hir;
use rustc_hir::def::{CtorOf, DefKind, Namespace, Res};
@ -46,7 +46,7 @@ use rustc_middle::ty::{
use rustc_session::lint::builtin::AMBIGUOUS_ASSOCIATED_ITEMS;
use rustc_span::edit_distance::find_best_match_for_name;
use rustc_span::symbol::{kw, Ident, Symbol};
use rustc_span::{sym, BytePos, Span, DUMMY_SP};
use rustc_span::{sym, Span, DUMMY_SP};
use rustc_target::spec::abi;
use rustc_trait_selection::traits::wf::object_region_bounds;
use rustc_trait_selection::traits::{self, ObligationCtxt};
@ -632,7 +632,10 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
trait_ref: &hir::TraitRef<'tcx>,
self_ty: Ty<'tcx>,
) -> ty::TraitRef<'tcx> {
self.prohibit_generic_args(trait_ref.path.segments.split_last().unwrap().1.iter(), |_| {});
let _ = self.prohibit_generic_args(
trait_ref.path.segments.split_last().unwrap().1.iter(),
GenericsArgsErrExtend::None,
);
self.lower_mono_trait_ref(
trait_ref.path.span,
@ -681,7 +684,10 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
let trait_def_id = trait_ref.trait_def_id().unwrap_or_else(|| FatalError.raise());
let trait_segment = trait_ref.path.segments.last().unwrap();
self.prohibit_generic_args(trait_ref.path.segments.split_last().unwrap().1.iter(), |_| {});
let _ = self.prohibit_generic_args(
trait_ref.path.segments.split_last().unwrap().1.iter(),
GenericsArgsErrExtend::None,
);
self.complain_about_internal_fn_trait(span, trait_def_id, trait_segment, false);
let (generic_args, arg_count) = self.lower_generic_args_of_path(
@ -995,8 +1001,8 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
hir_ref_id: hir::HirId,
span: Span,
qself_ty: Ty<'tcx>,
qself: &hir::Ty<'_>,
assoc_segment: &hir::PathSegment<'tcx>,
qself: &'tcx hir::Ty<'tcx>,
assoc_segment: &'tcx hir::PathSegment<'tcx>,
permit_variants: bool,
) -> Result<(Ty<'tcx>, DefKind, DefId), ErrorGuaranteed> {
debug!(%qself_ty, ?assoc_segment.ident);
@ -1020,99 +1026,10 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
if let Some(variant_def) = variant_def {
if permit_variants {
tcx.check_stability(variant_def.def_id, Some(hir_ref_id), span, None);
self.prohibit_generic_args(slice::from_ref(assoc_segment).iter(), |err| {
err.note("enum variants can't have type parameters");
let type_name = tcx.item_name(adt_def.did());
let msg = format!(
"you might have meant to specify type parameters on enum \
`{type_name}`"
);
let Some(args) = assoc_segment.args else {
return;
};
// Get the span of the generics args *including* the leading `::`.
// We do so by stretching args.span_ext to the left by 2. Earlier
// it was done based on the end of assoc segment but that sometimes
// led to impossible spans and caused issues like #116473
let args_span = args.span_ext.with_lo(args.span_ext.lo() - BytePos(2));
if tcx.generics_of(adt_def.did()).count() == 0 {
// FIXME(estebank): we could also verify that the arguments being
// work for the `enum`, instead of just looking if it takes *any*.
err.span_suggestion_verbose(
args_span,
format!("{type_name} doesn't have generic parameters"),
"",
Applicability::MachineApplicable,
);
return;
}
let Ok(snippet) = tcx.sess.source_map().span_to_snippet(args_span)
else {
err.note(msg);
return;
};
let (qself_sugg_span, is_self) =
if let hir::TyKind::Path(hir::QPath::Resolved(_, path)) =
&qself.kind
{
// If the path segment already has type params, we want to overwrite
// them.
match &path.segments {
// `segment` is the previous to last element on the path,
// which would normally be the `enum` itself, while the last
// `_` `PathSegment` corresponds to the variant.
[
..,
hir::PathSegment {
ident,
args,
res: Res::Def(DefKind::Enum, _),
..
},
_,
] => (
// We need to include the `::` in `Type::Variant::<Args>`
// to point the span to `::<Args>`, not just `<Args>`.
ident.span.shrink_to_hi().to(args
.map_or(ident.span.shrink_to_hi(), |a| a.span_ext)),
false,
),
[segment] => (
// We need to include the `::` in `Type::Variant::<Args>`
// to point the span to `::<Args>`, not just `<Args>`.
segment.ident.span.shrink_to_hi().to(segment
.args
.map_or(segment.ident.span.shrink_to_hi(), |a| {
a.span_ext
})),
kw::SelfUpper == segment.ident.name,
),
_ => {
err.note(msg);
return;
}
}
} else {
err.note(msg);
return;
};
let suggestion = vec![
if is_self {
// Account for people writing `Self::Variant::<Args>`, where
// `Self` is the enum, and suggest replacing `Self` with the
// appropriate type: `Type::<Args>::Variant`.
(qself.span, format!("{type_name}{snippet}"))
} else {
(qself_sugg_span, snippet)
},
(args_span, String::new()),
];
err.multipart_suggestion_verbose(
msg,
suggestion,
Applicability::MaybeIncorrect,
);
});
let _ = self.prohibit_generic_args(
slice::from_ref(assoc_segment).iter(),
GenericsArgsErrExtend::EnumVariant { qself, assoc_segment, adt_def },
);
return Ok((qself_ty, DefKind::Variant, variant_def.def_id));
} else {
variant_resolution = Some(variant_def.def_id);
@ -1624,111 +1541,26 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
pub fn prohibit_generic_args<'a>(
&self,
segments: impl Iterator<Item = &'a hir::PathSegment<'a>> + Clone,
extend: impl Fn(&mut Diag<'_>),
) -> bool {
let args = segments.clone().flat_map(|segment| segment.args().args);
let (lt, ty, ct, inf) =
args.clone().fold((false, false, false, false), |(lt, ty, ct, inf), arg| match arg {
hir::GenericArg::Lifetime(_) => (true, ty, ct, inf),
hir::GenericArg::Type(_) => (lt, true, ct, inf),
hir::GenericArg::Const(_) => (lt, ty, true, inf),
hir::GenericArg::Infer(_) => (lt, ty, ct, true),
});
let mut emitted = false;
if lt || ty || ct || inf {
let types_and_spans: Vec<_> = segments
.clone()
.flat_map(|segment| {
if segment.args().args.is_empty() {
None
} else {
Some((
match segment.res {
Res::PrimTy(ty) => {
format!("{} `{}`", segment.res.descr(), ty.name())
}
Res::Def(_, def_id)
if let Some(name) = self.tcx().opt_item_name(def_id) =>
{
format!("{} `{name}`", segment.res.descr())
}
Res::Err => "this type".to_string(),
_ => segment.res.descr().to_string(),
},
segment.ident.span,
))
}
})
.collect();
let this_type = match &types_and_spans[..] {
[.., _, (last, _)] => format!(
"{} and {last}",
types_and_spans[..types_and_spans.len() - 1]
.iter()
.map(|(x, _)| x.as_str())
.intersperse(", ")
.collect::<String>()
),
[(only, _)] => only.to_string(),
[] => "this type".to_string(),
};
let arg_spans: Vec<Span> = args.map(|arg| arg.span()).collect();
let mut kinds = Vec::with_capacity(4);
if lt {
kinds.push("lifetime");
}
if ty {
kinds.push("type");
}
if ct {
kinds.push("const");
}
if inf {
kinds.push("generic");
}
let (kind, s) = match kinds[..] {
[.., _, last] => (
format!(
"{} and {last}",
kinds[..kinds.len() - 1]
.iter()
.map(|&x| x)
.intersperse(", ")
.collect::<String>()
),
"s",
),
[only] => (only.to_string(), ""),
[] => unreachable!("expected at least one generic to prohibit"),
};
let last_span = *arg_spans.last().unwrap();
let span: MultiSpan = arg_spans.into();
let mut err = struct_span_code_err!(
self.tcx().dcx(),
span,
E0109,
"{kind} arguments are not allowed on {this_type}",
);
err.span_label(last_span, format!("{kind} argument{s} not allowed"));
for (what, span) in types_and_spans {
err.span_label(span, format!("not allowed on {what}"));
}
extend(&mut err);
self.set_tainted_by_errors(err.emit());
emitted = true;
err_extend: GenericsArgsErrExtend<'_>,
) -> Result<(), ErrorGuaranteed> {
let args_visitors = segments.clone().flat_map(|segment| segment.args().args);
let mut result = Ok(());
if let Some(_) = args_visitors.clone().next() {
result = Err(self.report_prohibit_generics_error(
segments.clone(),
args_visitors,
err_extend,
));
}
for segment in segments {
// Only emit the first error to avoid overloading the user with error messages.
if let Some(b) = segment.args().bindings.first() {
prohibit_assoc_item_binding(self.tcx(), b.span, None);
return true;
return Err(prohibit_assoc_item_binding(self.tcx(), b.span, None));
}
}
emitted
result
}
/// Probe path segments that are semantically allowed to have generic arguments.
@ -1893,9 +1725,8 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
// Check for desugared `impl Trait`.
assert!(tcx.is_type_alias_impl_trait(did));
let item_segment = path.segments.split_last().unwrap();
self.prohibit_generic_args(item_segment.1.iter(), |err| {
err.note("`impl Trait` types can't have type parameters");
});
let _ = self
.prohibit_generic_args(item_segment.1.iter(), GenericsArgsErrExtend::OpaqueTy);
let args = self.lower_generic_args_of_path_segment(span, did, item_segment.0);
Ty::new_opaque(tcx, did, args)
}
@ -1908,7 +1739,10 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
did,
) => {
assert_eq!(opt_self_ty, None);
self.prohibit_generic_args(path.segments.split_last().unwrap().1.iter(), |_| {});
let _ = self.prohibit_generic_args(
path.segments.split_last().unwrap().1.iter(),
GenericsArgsErrExtend::None,
);
self.lower_path_segment(span, did, path.segments.last().unwrap())
}
Res::Def(kind @ DefKind::Variant, def_id) if permit_variants => {
@ -1920,13 +1754,11 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
self.probe_generic_path_segments(path.segments, None, kind, def_id, span);
let indices: FxHashSet<_> =
generic_segments.iter().map(|GenericPathSegment(_, index)| index).collect();
self.prohibit_generic_args(
let _ = self.prohibit_generic_args(
path.segments.iter().enumerate().filter_map(|(index, seg)| {
if !indices.contains(&index) { Some(seg) } else { None }
}),
|err| {
err.note("enum variants can't have type parameters");
},
GenericsArgsErrExtend::DefVariant,
);
let GenericPathSegment(def_id, index) = generic_segments.last().unwrap();
@ -1934,27 +1766,25 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
}
Res::Def(DefKind::TyParam, def_id) => {
assert_eq!(opt_self_ty, None);
self.prohibit_generic_args(path.segments.iter(), |err| {
if let Some(span) = tcx.def_ident_span(def_id) {
let name = tcx.item_name(def_id);
err.span_note(span, format!("type parameter `{name}` defined here"));
}
});
let _ = self.prohibit_generic_args(
path.segments.iter(),
GenericsArgsErrExtend::TyParam(def_id),
);
self.lower_ty_param(hir_id)
}
Res::SelfTyParam { .. } => {
// `Self` in trait or type alias.
assert_eq!(opt_self_ty, None);
self.prohibit_generic_args(path.segments.iter(), |err| {
let _ = self.prohibit_generic_args(
path.segments.iter(),
if let [hir::PathSegment { args: Some(args), ident, .. }] = &path.segments {
err.span_suggestion_verbose(
GenericsArgsErrExtend::SelfTyParam(
ident.span.shrink_to_hi().to(args.span_ext),
"the `Self` type doesn't accept type parameters",
"",
Applicability::MaybeIncorrect,
);
}
});
)
} else {
GenericsArgsErrExtend::None
},
);
tcx.types.self_param
}
Res::SelfTyAlias { alias_to: def_id, forbid_generic, .. } => {
@ -1962,65 +1792,10 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
assert_eq!(opt_self_ty, None);
// Try to evaluate any array length constants.
let ty = tcx.at(span).type_of(def_id).instantiate_identity();
let span_of_impl = tcx.span_of_impl(def_id);
self.prohibit_generic_args(path.segments.iter(), |err| {
let def_id = match *ty.kind() {
ty::Adt(self_def, _) => self_def.did(),
_ => return,
};
let type_name = tcx.item_name(def_id);
let span_of_ty = tcx.def_ident_span(def_id);
let generics = tcx.generics_of(def_id).count();
let msg = format!("`Self` is of type `{ty}`");
if let (Ok(i_sp), Some(t_sp)) = (span_of_impl, span_of_ty) {
let mut span: MultiSpan = vec![t_sp].into();
span.push_span_label(
i_sp,
format!("`Self` is on type `{type_name}` in this `impl`"),
);
let mut postfix = "";
if generics == 0 {
postfix = ", which doesn't have generic parameters";
}
span.push_span_label(
t_sp,
format!("`Self` corresponds to this type{postfix}"),
);
err.span_note(span, msg);
} else {
err.note(msg);
}
for segment in path.segments {
if let Some(args) = segment.args
&& segment.ident.name == kw::SelfUpper
{
if generics == 0 {
// FIXME(estebank): we could also verify that the arguments being
// work for the `enum`, instead of just looking if it takes *any*.
err.span_suggestion_verbose(
segment.ident.span.shrink_to_hi().to(args.span_ext),
"the `Self` type doesn't accept type parameters",
"",
Applicability::MachineApplicable,
);
return;
} else {
err.span_suggestion_verbose(
segment.ident.span,
format!(
"the `Self` type doesn't accept type parameters, use the \
concrete type's name `{type_name}` instead if you want to \
specify its type parameters"
),
type_name,
Applicability::MaybeIncorrect,
);
}
}
}
});
let _ = self.prohibit_generic_args(
path.segments.iter(),
GenericsArgsErrExtend::SelfTyAlias { def_id, span },
);
// HACK(min_const_generics): Forbid generic `Self` types
// here as we can't easily do that during nameres.
//
@ -2061,7 +1836,10 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
}
Res::Def(DefKind::AssocTy, def_id) => {
debug_assert!(path.segments.len() >= 2);
self.prohibit_generic_args(path.segments[..path.segments.len() - 2].iter(), |_| {});
let _ = self.prohibit_generic_args(
path.segments[..path.segments.len() - 2].iter(),
GenericsArgsErrExtend::None,
);
// HACK: until we support `<Type as ~const Trait>`, assume all of them are.
let constness = if tcx.has_attr(tcx.parent(def_id), sym::const_trait) {
ty::BoundConstness::ConstIfConst
@ -2079,19 +1857,10 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
}
Res::PrimTy(prim_ty) => {
assert_eq!(opt_self_ty, None);
self.prohibit_generic_args(path.segments.iter(), |err| {
let name = prim_ty.name_str();
for segment in path.segments {
if let Some(args) = segment.args {
err.span_suggestion_verbose(
segment.ident.span.shrink_to_hi().to(args.span_ext),
format!("primitive type `{name}` doesn't have generic parameters"),
"",
Applicability::MaybeIncorrect,
);
}
}
});
let _ = self.prohibit_generic_args(
path.segments.iter(),
GenericsArgsErrExtend::PrimTy(prim_ty),
);
match prim_ty {
hir::PrimTy::Bool => tcx.types.bool,
hir::PrimTy::Char => tcx.types.char,

45
compiler/rustc_hir_analysis/src/hir_ty_lowering/object_safety.rs
View File

@ -1,5 +1,4 @@
use crate::bounds::Bounds;
use crate::errors::TraitObjectDeclaredWithNoTraits;
use crate::hir_ty_lowering::{GenericArgCountMismatch, GenericArgCountResult, OnlySelfBounds};
use rustc_data_structures::fx::{FxHashSet, FxIndexMap, FxIndexSet};
use rustc_errors::{codes::*, struct_span_code_err};
@ -86,47 +85,9 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
let (mut auto_traits, regular_traits): (Vec<_>, Vec<_>) =
expanded_traits.partition(|i| tcx.trait_is_auto(i.trait_ref().def_id()));
if regular_traits.len() > 1 {
let first_trait = &regular_traits[0];
let additional_trait = &regular_traits[1];
let mut err = struct_span_code_err!(
tcx.dcx(),
additional_trait.bottom().1,
E0225,
"only auto traits can be used as additional traits in a trait object"
);
additional_trait.label_with_exp_info(
&mut err,
"additional non-auto trait",
"additional use",
);
first_trait.label_with_exp_info(&mut err, "first non-auto trait", "first use");
err.help(format!(
"consider creating a new trait with all of these as supertraits and using that \
trait here instead: `trait NewTrait: {} {{}}`",
regular_traits
.iter()
// FIXME: This should `print_sugared`, but also needs to integrate projection bounds...
.map(|t| t.trait_ref().print_only_trait_path().to_string())
.collect::<Vec<_>>()
.join(" + "),
));
err.note(
"auto-traits like `Send` and `Sync` are traits that have special properties; \
for more information on them, visit \
<https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits>",
);
self.set_tainted_by_errors(err.emit());
}
if regular_traits.is_empty() && auto_traits.is_empty() {
let trait_alias_span = trait_bounds
.iter()
.map(|&(trait_ref, _)| trait_ref.def_id())
.find(|&trait_ref| tcx.is_trait_alias(trait_ref))
.map(|trait_ref| tcx.def_span(trait_ref));
let reported =
tcx.dcx().emit_err(TraitObjectDeclaredWithNoTraits { span, trait_alias_span });
self.set_tainted_by_errors(reported);
let _ = self.report_trait_object_addition_traits_error(&regular_traits);
} else if regular_traits.is_empty() && auto_traits.is_empty() {
let reported = self.report_trait_object_with_no_traits_error(span, &trait_bounds);
return Ty::new_error(tcx, reported);
}

2
compiler/rustc_hir_typeck/messages.ftl
View File

@ -86,7 +86,7 @@ hir_typeck_invalid_callee = expected function, found {$ty}
hir_typeck_lossy_provenance_int2ptr =
strict provenance disallows casting integer `{$expr_ty}` to pointer `{$cast_ty}`
.suggestion = use `.with_addr()` to adjust a valid pointer in the same allocation, to this address
.help = if you can't comply with strict provenance and don't have a pointer with the correct provenance you can use `std::ptr::from_exposed_addr()` instead
.help = if you can't comply with strict provenance and don't have a pointer with the correct provenance you can use `std::ptr::with_exposed_provenance()` instead
hir_typeck_lossy_provenance_ptr2int =
under strict provenance it is considered bad style to cast pointer `{$expr_ty}` to integer `{$cast_ty}`

7
compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
View File

@ -11,6 +11,7 @@ use rustc_hir::def::{CtorOf, DefKind, Res};
use rustc_hir::def_id::DefId;
use rustc_hir::lang_items::LangItem;
use rustc_hir::{ExprKind, GenericArg, Node, QPath};
use rustc_hir_analysis::hir_ty_lowering::errors::GenericsArgsErrExtend;
use rustc_hir_analysis::hir_ty_lowering::generics::{
check_generic_arg_count_for_call, lower_generic_args,
};
@ -1177,11 +1178,11 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
let indices: FxHashSet<_> =
generic_segments.iter().map(|GenericPathSegment(_, index)| index).collect();
let generics_has_err = self.lowerer().prohibit_generic_args(
let generics_err = self.lowerer().prohibit_generic_args(
segments.iter().enumerate().filter_map(|(index, seg)| {
if !indices.contains(&index) || is_alias_variant_ctor { Some(seg) } else { None }
}),
|_| {},
GenericsArgsErrExtend::None,
);
if let Res::Local(hid) = res {
@ -1191,7 +1192,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
return (ty, res);
}
if generics_has_err {
if let Err(_) = generics_err {
// Don't try to infer type parameters when prohibited generic arguments were given.
user_self_ty = None;
}

6
compiler/rustc_lint_defs/src/builtin.rs
View File

@ -2749,7 +2749,7 @@ declare_lint! {
/// memory the pointer is allowed to read/write. Casting an integer, which
/// doesn't have provenance, to a pointer requires the compiler to assign
/// (guess) provenance. The compiler assigns "all exposed valid" (see the
/// docs of [`ptr::from_exposed_addr`] for more information about this
/// docs of [`ptr::with_exposed_provenance`] for more information about this
/// "exposing"). This penalizes the optimiser and is not well suited for
/// dynamic analysis/dynamic program verification (e.g. Miri or CHERI
/// platforms).
@ -2757,11 +2757,11 @@ declare_lint! {
/// It is much better to use [`ptr::with_addr`] instead to specify the
/// provenance you want. If using this function is not possible because the
/// code relies on exposed provenance then there is as an escape hatch
/// [`ptr::from_exposed_addr`].
/// [`ptr::with_exposed_provenance`].
///
/// [issue #95228]: https://github.com/rust-lang/rust/issues/95228
/// [`ptr::with_addr`]: https://doc.rust-lang.org/core/primitive.pointer.html#method.with_addr
/// [`ptr::from_exposed_addr`]: https://doc.rust-lang.org/core/ptr/fn.from_exposed_addr.html
/// [`ptr::with_exposed_provenance`]: https://doc.rust-lang.org/core/ptr/fn.with_exposed_provenance.html
pub FUZZY_PROVENANCE_CASTS,
Allow,
"a fuzzy integer to pointer cast is used",

2
compiler/rustc_middle/src/mir/statement.rs
View File

@ -426,7 +426,7 @@ impl<'tcx> Rvalue<'tcx> {
| CastKind::FnPtrToPtr
| CastKind::PtrToPtr
| CastKind::PointerCoercion(_)
| CastKind::PointerFromExposedAddress
| CastKind::PointerWithExposedProvenance
| CastKind::DynStar
| CastKind::Transmute,
_,

4
compiler/rustc_middle/src/mir/syntax.rs
View File

@ -1312,8 +1312,8 @@ pub enum CastKind {
/// See the docs on `expose_addr` for more details.
PointerExposeAddress,
/// An address-to-pointer cast that picks up an exposed provenance.
/// See the docs on `from_exposed_addr` for more details.
PointerFromExposedAddress,
/// See the docs on `with_exposed_provenance` for more details.
PointerWithExposedProvenance,
/// Pointer related casts that are done by coercions. Note that reference-to-raw-ptr casts are
/// translated into `&raw mut/const *r`, i.e., they are not actually casts.
PointerCoercion(PointerCoercion),

2
compiler/rustc_middle/src/ty/cast.rs
View File

@ -85,7 +85,7 @@ pub fn mir_cast_kind<'tcx>(from_ty: Ty<'tcx>, cast_ty: Ty<'tcx>) -> mir::CastKin
(Some(CastTy::Ptr(_) | CastTy::FnPtr), Some(CastTy::Int(_))) => {
mir::CastKind::PointerExposeAddress
}
(Some(CastTy::Int(_)), Some(CastTy::Ptr(_))) => mir::CastKind::PointerFromExposedAddress,
(Some(CastTy::Int(_)), Some(CastTy::Ptr(_))) => mir::CastKind::PointerWithExposedProvenance,
(_, Some(CastTy::DynStar)) => mir::CastKind::DynStar,
(Some(CastTy::Int(_)), Some(CastTy::Int(_))) => mir::CastKind::IntToInt,
(Some(CastTy::FnPtr), Some(CastTy::Ptr(_))) => mir::CastKind::FnPtrToPtr,

2
compiler/rustc_smir/src/rustc_smir/convert/mir.rs
View File

@ -268,7 +268,7 @@ impl<'tcx> Stable<'tcx> for mir::CastKind {
use rustc_middle::mir::CastKind::*;
match self {
PointerExposeAddress => stable_mir::mir::CastKind::PointerExposeAddress,
PointerFromExposedAddress => stable_mir::mir::CastKind::PointerFromExposedAddress,
PointerWithExposedProvenance => stable_mir::mir::CastKind::PointerWithExposedProvenance,
PointerCoercion(c) => stable_mir::mir::CastKind::PointerCoercion(c.stable(tables)),
DynStar => stable_mir::mir::CastKind::DynStar,
IntToInt => stable_mir::mir::CastKind::IntToInt,

2
compiler/rustc_span/src/symbol.rs
View File

@ -1675,7 +1675,6 @@ symbols! {
simd_fmin,
simd_fpow,
simd_fpowi,
simd_from_exposed_addr,
simd_fsin,
simd_fsqrt,
simd_gather,
@ -1714,6 +1713,7 @@ symbols! {
simd_shuffle_generic,
simd_sub,
simd_trunc,
simd_with_exposed_provenance,
simd_xor,
since,
sinf128,

2
compiler/rustc_trait_selection/src/traits/mod.rs
View File

@ -65,7 +65,7 @@ pub use self::util::{
check_args_compatible, supertrait_def_ids, supertraits, transitive_bounds,
transitive_bounds_that_define_assoc_item, SupertraitDefIds,
};
pub use self::util::{expand_trait_aliases, TraitAliasExpander};
pub use self::util::{expand_trait_aliases, TraitAliasExpander, TraitAliasExpansionInfo};
pub use self::util::{get_vtable_index_of_object_method, impl_item_is_final, upcast_choices};
pub use self::util::{with_replaced_escaping_bound_vars, BoundVarReplacer, PlaceholderReplacer};

2
compiler/stable_mir/src/mir/body.rs
View File

@ -972,7 +972,7 @@ pub enum PointerCoercion {
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub enum CastKind {
PointerExposeAddress,
PointerFromExposedAddress,
PointerWithExposedProvenance,
PointerCoercion(PointerCoercion),
DynStar,
IntToInt,

7
library/core/src/intrinsics/simd.rs
View File

@ -549,6 +549,10 @@ extern "rust-intrinsic" {
///
/// `U` must be a vector of pointers, with the same length as `T`.
#[rustc_nounwind]
#[cfg(not(bootstrap))]
pub fn simd_with_exposed_provenance<T, U>(addr: T) -> U;
#[rustc_nounwind]
#[cfg(bootstrap)]
pub fn simd_from_exposed_addr<T, U>(addr: T) -> U;
/// Swap bytes of each element.
@ -655,3 +659,6 @@ extern "rust-intrinsic" {
#[rustc_nounwind]
pub fn simd_flog<T>(a: T) -> T;
}
#[cfg(bootstrap)]
pub use simd_from_exposed_addr as simd_with_exposed_provenance;

14
library/core/src/ptr/const_ptr.rs
View File

@ -165,7 +165,7 @@ impl<T: ?Sized> *const T {
#[unstable(feature = "ptr_to_from_bits", issue = "91126")]
#[deprecated(
since = "1.67.0",
note = "replaced by the `ptr::from_exposed_addr` function, or update \
note = "replaced by the `ptr::with_exposed_provenance` function, or update \
your code to follow the strict provenance rules using its APIs"
)]
#[allow(fuzzy_provenance_casts)] // this is an unstable and semi-deprecated cast function
@ -187,7 +187,7 @@ impl<T: ?Sized> *const T {
///
/// If using those APIs is not possible because there is no way to preserve a pointer with the
/// required provenance, then Strict Provenance might not be for you. Use pointer-integer casts
/// or [`expose_addr`][pointer::expose_addr] and [`from_exposed_addr`][from_exposed_addr]
/// or [`expose_addr`][pointer::expose_addr] and [`with_exposed_provenance`][with_exposed_provenance]
/// instead. However, note that this makes your code less portable and less amenable to tools
/// that check for compliance with the Rust memory model.
///
@ -211,30 +211,30 @@ impl<T: ?Sized> *const T {
}
/// Gets the "address" portion of the pointer, and 'exposes' the "provenance" part for future
/// use in [`from_exposed_addr`][].
/// use in [`with_exposed_provenance`][].
///
/// This is equivalent to `self as usize`, which semantically discards *provenance* and
/// *address-space* information. Furthermore, this (like the `as` cast) has the implicit
/// side-effect of marking the provenance as 'exposed', so on platforms that support it you can
/// later call [`from_exposed_addr`][] to reconstitute the original pointer including its
/// later call [`with_exposed_provenance`][] to reconstitute the original pointer including its
/// provenance. (Reconstructing address space information, if required, is your responsibility.)
///
/// Using this method means that code is *not* following [Strict
/// Provenance][super#strict-provenance] rules. Supporting
/// [`from_exposed_addr`][] complicates specification and reasoning and may not be supported by
/// [`with_exposed_provenance`][] complicates specification and reasoning and may not be supported by
/// tools that help you to stay conformant with the Rust memory model, so it is recommended to
/// use [`addr`][pointer::addr] wherever possible.
///
/// On most platforms this will produce a value with the same bytes as the original pointer,
/// because all the bytes are dedicated to describing the address. Platforms which need to store
/// additional information in the pointer may not support this operation, since the 'expose'
/// side-effect which is required for [`from_exposed_addr`][] to work is typically not
/// side-effect which is required for [`with_exposed_provenance`][] to work is typically not
/// available.
///
/// It is unclear whether this method can be given a satisfying unambiguous specification. This
/// API and its claimed semantics are part of [Exposed Provenance][super#exposed-provenance].
///
/// [`from_exposed_addr`]: from_exposed_addr
/// [`with_exposed_provenance`]: with_exposed_provenance
#[must_use]
#[inline(always)]
#[unstable(feature = "exposed_provenance", issue = "95228")]

24
library/core/src/ptr/mod.rs
View File

@ -340,13 +340,13 @@
//! clear where a satisfying unambiguous semantics can be defined for Exposed Provenance.
//! Furthermore, Exposed Provenance will not work (well) with tools like [Miri] and [CHERI].
//!
//! Exposed Provenance is provided by the [`expose_addr`] and [`from_exposed_addr`] methods, which
//! Exposed Provenance is provided by the [`expose_addr`] and [`with_exposed_provenance`] methods, which
//! are meant to replace `as` casts between pointers and integers. [`expose_addr`] is a lot like
//! [`addr`], but additionally adds the provenance of the pointer to a global list of 'exposed'
//! provenances. (This list is purely conceptual, it exists for the purpose of specifying Rust but
//! is not materialized in actual executions, except in tools like [Miri].) [`from_exposed_addr`]
//! is not materialized in actual executions, except in tools like [Miri].) [`with_exposed_provenance`]
//! can be used to construct a pointer with one of these previously 'exposed' provenances.
//! [`from_exposed_addr`] takes only `addr: usize` as arguments, so unlike in [`with_addr`] there is
//! [`with_exposed_provenance`] takes only `addr: usize` as arguments, so unlike in [`with_addr`] there is
//! no indication of what the correct provenance for the returned pointer is -- and that is exactly
//! what makes pointer-usize-pointer roundtrips so tricky to rigorously specify! There is no
//! algorithm that decides which provenance will be used. You can think of this as "guessing" the
@ -355,10 +355,10 @@
//! there is *no* previously 'exposed' provenance that justifies the way the returned pointer will
//! be used, the program has undefined behavior.
//!
//! Using [`expose_addr`] or [`from_exposed_addr`] (or the `as` casts) means that code is
//! Using [`expose_addr`] or [`with_exposed_provenance`] (or the `as` casts) means that code is
//! *not* following Strict Provenance rules. The goal of the Strict Provenance experiment is to
//! determine how far one can get in Rust without the use of [`expose_addr`] and
//! [`from_exposed_addr`], and to encourage code to be written with Strict Provenance APIs only.
//! [`with_exposed_provenance`], and to encourage code to be written with Strict Provenance APIs only.
//! Maximizing the amount of such code is a major win for avoiding specification complexity and to
//! facilitate adoption of tools like [CHERI] and [Miri] that can be a big help in increasing the
//! confidence in (unsafe) Rust code.
@ -375,7 +375,7 @@
//! [`addr`]: pointer::addr
//! [`ptr::dangling`]: core::ptr::dangling
//! [`expose_addr`]: pointer::expose_addr
//! [`from_exposed_addr`]: from_exposed_addr
//! [`with_exposed_provenance`]: with_exposed_provenance
//! [Miri]: https://github.com/rust-lang/miri
//! [CHERI]: https://www.cl.cam.ac.uk/research/security/ctsrd/cheri/
//! [Strict Provenance]: https://github.com/rust-lang/rust/issues/95228
@ -581,7 +581,7 @@ pub const fn null_mut<T: ?Sized + Thin>() -> *mut T {
/// little more than a usize address in disguise.
///
/// This is different from `addr as *const T`, which creates a pointer that picks up a previously
/// exposed provenance. See [`from_exposed_addr`] for more details on that operation.
/// exposed provenance. See [`with_exposed_provenance`] for more details on that operation.
///
/// This API and its claimed semantics are part of the Strict Provenance experiment,
/// see the [module documentation][crate::ptr] for details.
@ -592,7 +592,7 @@ pub const fn null_mut<T: ?Sized + Thin>() -> *mut T {
pub const fn without_provenance<T>(addr: usize) -> *const T {
// FIXME(strict_provenance_magic): I am magic and should be a compiler intrinsic.
// We use transmute rather than a cast so tools like Miri can tell that this
// is *not* the same as from_exposed_addr.
// is *not* the same as with_exposed_provenance.
// SAFETY: every valid integer is also a valid pointer (as long as you don't dereference that
// pointer).
unsafe { mem::transmute(addr) }
@ -625,7 +625,7 @@ pub const fn dangling<T>() -> *const T {
/// little more than a usize address in disguise.
///
/// This is different from `addr as *mut T`, which creates a pointer that picks up a previously
/// exposed provenance. See [`from_exposed_addr_mut`] for more details on that operation.
/// exposed provenance. See [`with_exposed_provenance_mut`] for more details on that operation.
///
/// This API and its claimed semantics are part of the Strict Provenance experiment,
/// see the [module documentation][crate::ptr] for details.
@ -636,7 +636,7 @@ pub const fn dangling<T>() -> *const T {
pub const fn without_provenance_mut<T>(addr: usize) -> *mut T {
// FIXME(strict_provenance_magic): I am magic and should be a compiler intrinsic.
// We use transmute rather than a cast so tools like Miri can tell that this
// is *not* the same as from_exposed_addr.
// is *not* the same as with_exposed_provenance.
// SAFETY: every valid integer is also a valid pointer (as long as you don't dereference that
// pointer).
unsafe { mem::transmute(addr) }
@ -699,7 +699,7 @@ pub const fn dangling_mut<T>() -> *mut T {
#[unstable(feature = "exposed_provenance", issue = "95228")]
#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
#[allow(fuzzy_provenance_casts)] // this *is* the explicit provenance API one should use instead
pub fn from_exposed_addr<T>(addr: usize) -> *const T
pub fn with_exposed_provenance<T>(addr: usize) -> *const T
where
T: Sized,
{
@ -739,7 +739,7 @@ where
#[unstable(feature = "exposed_provenance", issue = "95228")]
#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
#[allow(fuzzy_provenance_casts)] // this *is* the explicit provenance API one should use instead
pub fn from_exposed_addr_mut<T>(addr: usize) -> *mut T
pub fn with_exposed_provenance_mut<T>(addr: usize) -> *mut T
where
T: Sized,
{

14
library/core/src/ptr/mut_ptr.rs
View File

@ -171,7 +171,7 @@ impl<T: ?Sized> *mut T {
#[unstable(feature = "ptr_to_from_bits", issue = "91126")]
#[deprecated(
since = "1.67.0",
note = "replaced by the `ptr::from_exposed_addr_mut` function, or \
note = "replaced by the `ptr::with_exposed_provenance_mut` function, or \
update your code to follow the strict provenance rules using its APIs"
)]
#[allow(fuzzy_provenance_casts)] // this is an unstable and semi-deprecated cast function
@ -194,7 +194,7 @@ impl<T: ?Sized> *mut T {
///
/// If using those APIs is not possible because there is no way to preserve a pointer with the
/// required provenance, then Strict Provenance might not be for you. Use pointer-integer casts
/// or [`expose_addr`][pointer::expose_addr] and [`from_exposed_addr`][from_exposed_addr]
/// or [`expose_addr`][pointer::expose_addr] and [`with_exposed_provenance`][with_exposed_provenance]
/// instead. However, note that this makes your code less portable and less amenable to tools
/// that check for compliance with the Rust memory model.
///
@ -218,30 +218,30 @@ impl<T: ?Sized> *mut T {
}
/// Gets the "address" portion of the pointer, and 'exposes' the "provenance" part for future
/// use in [`from_exposed_addr`][].
/// use in [`with_exposed_provenance`][].
///
/// This is equivalent to `self as usize`, which semantically discards *provenance* and
/// *address-space* information. Furthermore, this (like the `as` cast) has the implicit
/// side-effect of marking the provenance as 'exposed', so on platforms that support it you can
/// later call [`from_exposed_addr_mut`][] to reconstitute the original pointer including its
/// later call [`with_exposed_provenance_mut`][] to reconstitute the original pointer including its
/// provenance. (Reconstructing address space information, if required, is your responsibility.)
///
/// Using this method means that code is *not* following [Strict
/// Provenance][super#strict-provenance] rules. Supporting
/// [`from_exposed_addr_mut`][] complicates specification and reasoning and may not be supported
/// [`with_exposed_provenance_mut`][] complicates specification and reasoning and may not be supported
/// by tools that help you to stay conformant with the Rust memory model, so it is recommended
/// to use [`addr`][pointer::addr] wherever possible.
///
/// On most platforms this will produce a value with the same bytes as the original pointer,
/// because all the bytes are dedicated to describing the address. Platforms which need to store
/// additional information in the pointer may not support this operation, since the 'expose'
/// side-effect which is required for [`from_exposed_addr_mut`][] to work is typically not
/// side-effect which is required for [`with_exposed_provenance_mut`][] to work is typically not
/// available.
///
/// It is unclear whether this method can be given a satisfying unambiguous specification. This
/// API and its claimed semantics are part of [Exposed Provenance][super#exposed-provenance].
///
/// [`from_exposed_addr_mut`]: from_exposed_addr_mut
/// [`with_exposed_provenance_mut`]: with_exposed_provenance_mut
#[must_use]
#[inline(always)]
#[unstable(feature = "exposed_provenance", issue = "95228")]

67
library/core/src/task/wake.rs
View File

@ -2,6 +2,7 @@
use crate::mem::transmute;
use crate::any::Any;
use crate::fmt;
use crate::marker::PhantomData;
use crate::ptr;
@ -220,6 +221,12 @@ impl RawWakerVTable {
}
}
#[derive(Debug)]
enum ExtData<'a> {
Some(&'a mut dyn Any),
None(()),
}
/// The context of an asynchronous task.
///
/// Currently, `Context` only serves to provide access to a [`&Waker`](Waker)
@ -229,6 +236,7 @@ impl RawWakerVTable {
pub struct Context<'a> {
waker: &'a Waker,
local_waker: &'a LocalWaker,
ext: ExtData<'a>,
// Ensure we future-proof against variance changes by forcing
// the lifetime to be invariant (argument-position lifetimes
// are contravariant while return-position lifetimes are
@ -257,6 +265,7 @@ impl<'a> Context<'a> {
pub const fn waker(&self) -> &'a Waker {
&self.waker
}
/// Returns a reference to the [`LocalWaker`] for the current task.
#[inline]
#[unstable(feature = "local_waker", issue = "118959")]
@ -264,6 +273,17 @@ impl<'a> Context<'a> {
pub const fn local_waker(&self) -> &'a LocalWaker {
&self.local_waker
}
/// Returns a reference to the extension data for the current task.
#[inline]
#[unstable(feature = "context_ext", issue = "123392")]
#[rustc_const_unstable(feature = "const_waker", issue = "102012")]
pub const fn ext(&mut self) -> &mut dyn Any {
match &mut self.ext {
ExtData::Some(data) => *data,
ExtData::None(unit) => unit,
}
}
}
#[stable(feature = "futures_api", since = "1.36.0")]
@ -300,6 +320,7 @@ impl fmt::Debug for Context<'_> {
pub struct ContextBuilder<'a> {
waker: &'a Waker,
local_waker: &'a LocalWaker,
ext: ExtData<'a>,
// Ensure we future-proof against variance changes by forcing
// the lifetime to be invariant (argument-position lifetimes
// are contravariant while return-position lifetimes are
@ -318,7 +339,39 @@ impl<'a> ContextBuilder<'a> {
pub const fn from_waker(waker: &'a Waker) -> Self {
// SAFETY: LocalWaker is just Waker without thread safety
let local_waker = unsafe { transmute(waker) };
Self { waker: waker, local_waker, _marker: PhantomData, _marker2: PhantomData }
Self {
waker: waker,
local_waker,
ext: ExtData::None(()),
_marker: PhantomData,
_marker2: PhantomData,
}
}
/// Create a ContextBuilder from an existing Context.
#[inline]
#[rustc_const_unstable(feature = "const_waker", issue = "102012")]
#[unstable(feature = "context_ext", issue = "123392")]
pub const fn from(cx: &'a mut Context<'_>) -> Self {
let ext = match &mut cx.ext {
ExtData::Some(ext) => ExtData::Some(*ext),
ExtData::None(()) => ExtData::None(()),
};
Self {
waker: cx.waker,
local_waker: cx.local_waker,
ext,
_marker: PhantomData,
_marker2: PhantomData,
}
}
/// This method is used to set the value for the waker on `Context`.
#[inline]
#[unstable(feature = "context_ext", issue = "123392")]
#[rustc_const_unstable(feature = "const_waker", issue = "102012")]
pub const fn waker(self, waker: &'a Waker) -> Self {
Self { waker, ..self }
}
/// This method is used to set the value for the local waker on `Context`.
@ -329,13 +382,21 @@ impl<'a> ContextBuilder<'a> {
Self { local_waker, ..self }
}
/// This method is used to set the value for the extension data on `Context`.
#[inline]
#[unstable(feature = "context_ext", issue = "123392")]
#[rustc_const_unstable(feature = "const_waker", issue = "102012")]
pub const fn ext(self, data: &'a mut dyn Any) -> Self {
Self { ext: ExtData::Some(data), ..self }
}
/// Builds the `Context`.
#[inline]
#[unstable(feature = "local_waker", issue = "118959")]
#[rustc_const_unstable(feature = "const_waker", issue = "102012")]
pub const fn build(self) -> Context<'a> {
let ContextBuilder { waker, local_waker, _marker, _marker2 } = self;
Context { waker, local_waker, _marker, _marker2 }
let ContextBuilder { waker, local_waker, ext, _marker, _marker2 } = self;
Context { waker, local_waker, ext, _marker, _marker2 }
}
}

10
library/portable-simd/crates/core_simd/src/simd/ptr/const_ptr.rs
View File

@ -51,13 +51,13 @@ pub trait SimdConstPtr: Copy + Sealed {
fn with_addr(self, addr: Self::Usize) -> Self;
/// Gets the "address" portion of the pointer, and "exposes" the provenance part for future use
/// in [`Self::from_exposed_addr`].
/// in [`Self::with_exposed_provenance`].
fn expose_addr(self) -> Self::Usize;
/// Convert an address back to a pointer, picking up a previously "exposed" provenance.
///
/// Equivalent to calling [`core::ptr::from_exposed_addr`] on each element.
fn from_exposed_addr(addr: Self::Usize) -> Self;
/// Equivalent to calling [`core::ptr::with_exposed_provenance`] on each element.
fn with_exposed_provenance(addr: Self::Usize) -> Self;
/// Calculates the offset from a pointer using wrapping arithmetic.
///
@ -137,9 +137,9 @@ where
}
#[inline]
fn from_exposed_addr(addr: Self::Usize) -> Self {
fn with_exposed_provenance(addr: Self::Usize) -> Self {
// Safety: `self` is a pointer vector
unsafe { core::intrinsics::simd::simd_from_exposed_addr(addr) }
unsafe { core::intrinsics::simd::simd_with_exposed_provenance(addr) }
}
#[inline]

10
library/portable-simd/crates/core_simd/src/simd/ptr/mut_ptr.rs
View File

@ -48,13 +48,13 @@ pub trait SimdMutPtr: Copy + Sealed {
fn with_addr(self, addr: Self::Usize) -> Self;
/// Gets the "address" portion of the pointer, and "exposes" the provenance part for future use
/// in [`Self::from_exposed_addr`].
/// in [`Self::with_exposed_provenance`].
fn expose_addr(self) -> Self::Usize;
/// Convert an address back to a pointer, picking up a previously "exposed" provenance.
///
/// Equivalent to calling [`core::ptr::from_exposed_addr_mut`] on each element.
fn from_exposed_addr(addr: Self::Usize) -> Self;
/// Equivalent to calling [`core::ptr::with_exposed_provenance_mut`] on each element.
fn with_exposed_provenance(addr: Self::Usize) -> Self;
/// Calculates the offset from a pointer using wrapping arithmetic.
///
@ -134,9 +134,9 @@ where
}
#[inline]
fn from_exposed_addr(addr: Self::Usize) -> Self {
fn with_exposed_provenance(addr: Self::Usize) -> Self {
// Safety: `self` is a pointer vector
unsafe { core::intrinsics::simd::simd_from_exposed_addr(addr) }
unsafe { core::intrinsics::simd::simd_with_exposed_provenance(addr) }
}
#[inline]

12
library/portable-simd/crates/core_simd/tests/pointers.rs
View File

@ -80,10 +80,10 @@ mod const_ptr {
);
}
fn from_exposed_addr<const LANES: usize>() {
fn with_exposed_provenance<const LANES: usize>() {
test_helpers::test_unary_elementwise(
&Simd::<*const u32, LANES>::from_exposed_addr,
&core::ptr::from_exposed_addr::<u32>,
&Simd::<*const u32, LANES>::with_exposed_provenance,
&core::ptr::with_exposed_provenance::<u32>,
&|_| true,
);
}
@ -103,10 +103,10 @@ mod mut_ptr {
);
}
fn from_exposed_addr<const LANES: usize>() {
fn with_exposed_provenance<const LANES: usize>() {
test_helpers::test_unary_elementwise(
&Simd::<*mut u32, LANES>::from_exposed_addr,
&core::ptr::from_exposed_addr_mut::<u32>,
&Simd::<*mut u32, LANES>::with_exposed_provenance,
&core::ptr::with_exposed_provenance_mut::<u32>,
&|_| true,
);
}

2
library/std/src/os/xous/ffi.rs
View File

@ -389,7 +389,7 @@ pub(crate) unsafe fn map_memory<T>(
let result = a0;
if result == SyscallResult::MemoryRange as usize {
let start = core::ptr::from_exposed_addr_mut::<T>(a1);
let start = core::ptr::with_exposed_provenance_mut::<T>(a1);
let len = a2 / core::mem::size_of::<T>();
let end = unsafe { start.add(len) };
Ok(unsafe { core::slice::from_raw_parts_mut(start, len) })

2
library/std/src/sys/pal/hermit/thread.rs
View File

@ -47,7 +47,7 @@ impl Thread {
extern "C" fn thread_start(main: usize) {
unsafe {
// Finally, let's run some code.
Box::from_raw(ptr::from_exposed_addr::<Box<dyn FnOnce()>>(main).cast_mut())();
Box::from_raw(ptr::with_exposed_provenance::<Box<dyn FnOnce()>>(main).cast_mut())();
// run all destructors
run_dtors();

2
library/std/src/sys/pal/itron/thread.rs
View File

@ -98,7 +98,7 @@ impl Thread {
});
unsafe extern "C" fn trampoline(exinf: isize) {
let p_inner: *mut ThreadInner = crate::ptr::from_exposed_addr_mut(exinf as usize);
let p_inner: *mut ThreadInner = crate::ptr::with_exposed_provenance_mut(exinf as usize);
// Safety: `ThreadInner` is alive at this point
let inner = unsafe { &*p_inner };

2
library/std/src/sys/pal/xous/thread_local_key.rs
View File

@ -49,7 +49,7 @@ fn tls_ptr_addr() -> *mut *mut u8 {
out(reg) tp,
);
}
core::ptr::from_exposed_addr_mut::<*mut u8>(tp)
core::ptr::with_exposed_provenance_mut::<*mut u8>(tp)
}
/// Create an area of memory that's unique per thread. This area will

4
library/std/src/sys/pal/zkvm/thread_local_key.rs
View File

@ -9,13 +9,13 @@ pub unsafe fn create(_dtor: Option<unsafe extern "C" fn(*mut u8)>) -> Key {
#[inline]
pub unsafe fn set(key: Key, value: *mut u8) {
let key: *mut *mut u8 = core::ptr::from_exposed_addr_mut(key);
let key: *mut *mut u8 = core::ptr::with_exposed_provenance_mut(key);
*key = value;
}
#[inline]
pub unsafe fn get(key: Key) -> *mut u8 {
let key: *mut *mut u8 = core::ptr::from_exposed_addr_mut(key);
let key: *mut *mut u8 = core::ptr::with_exposed_provenance_mut(key);
*key
}

2
library/std/src/sys/personality/dwarf/eh.rs
View File

@ -125,7 +125,7 @@ pub unsafe fn find_eh_action(lsda: *const u8, context: &EHContext<'_>) -> Result
// Can never have null landing pad for sjlj -- that would have
// been indicated by a -1 call site index.
// FIXME(strict provenance)
let lpad = ptr::from_exposed_addr((cs_lpad + 1) as usize);
let lpad = ptr::with_exposed_provenance((cs_lpad + 1) as usize);
return Ok(interpret_cs_action(action_table, cs_action_entry, lpad));
}
}

10
src/bootstrap/src/core/build_steps/compile.rs
View File

@ -825,6 +825,7 @@ fn cp_rustc_component_to_ci_sysroot(
#[derive(Debug, PartialOrd, Ord, Clone, PartialEq, Eq, Hash)]
pub struct Rustc {
pub target: TargetSelection,
/// The **previous** compiler used to compile this compiler.
pub compiler: Compiler,
/// Whether to build a subset of crates, rather than the whole compiler.
///
@ -1512,12 +1513,9 @@ impl Step for Sysroot {
run.never()
}
/// Returns the sysroot for the `compiler` specified that *this build system
/// generates*.
///
/// That is, the sysroot for the stage0 compiler is not what the compiler
/// thinks it is by default, but it's the same as the default for stages
/// 1-3.
/// Returns the sysroot that `compiler` is supposed to use.
/// For the stage0 compiler, this is stage0-sysroot (because of the initial std build).
/// For all other stages, it's the same stage directory that the compiler lives in.
fn run(self, builder: &Builder<'_>) -> PathBuf {
let compiler = self.compiler;
let host_dir = builder.out.join(compiler.host.triple);

1
src/bootstrap/src/core/build_steps/llvm.rs
View File

@ -274,6 +274,7 @@ impl Step for Llvm {
target.to_string()
};
// If LLVM has already been built or been downloaded through download-ci-llvm, we avoid building it again.
let Meta { stamp, res, out_dir, root } = match prebuilt_llvm_config(builder, target) {
Ok(p) => return p,
Err(m) => m,

2
src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs
View File

@ -112,7 +112,7 @@ fn check_rvalue<'tcx>(
Rvalue::Repeat(operand, _)
| Rvalue::Use(operand)
| Rvalue::Cast(
CastKind::PointerFromExposedAddress
CastKind::PointerWithExposedProvenance
| CastKind::IntToInt
| CastKind::FloatToInt
| CastKind::IntToFloat

2
src/tools/miri/README.md
View File

@ -324,7 +324,7 @@ environment variable. We first document the most relevant and most commonly used
number of available CPUs is `1`. Note that this flag does not affect how miri handles threads in
any way.
* `-Zmiri-permissive-provenance` disables the warning for integer-to-pointer casts and
[`ptr::from_exposed_addr`](https://doc.rust-lang.org/nightly/std/ptr/fn.from_exposed_addr.html).
[`ptr::with_exposed_provenance`](https://doc.rust-lang.org/nightly/std/ptr/fn.with_exposed_provenance.html).
This will necessarily miss some bugs as those operations are not efficiently and accurately
implementable in a sanitizer, but it will only miss bugs that concern memory/pointers which is
subject to these operations.

6
src/tools/miri/src/alloc_addresses/mod.rs
View File

@ -18,12 +18,12 @@ use reuse_pool::ReusePool;
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub enum ProvenanceMode {
/// We support `expose_addr`/`from_exposed_addr` via "wildcard" provenance.
/// However, we want on `from_exposed_addr` to alert the user of the precision loss.
/// We support `expose_addr`/`with_exposed_provenance` via "wildcard" provenance.
/// However, we want on `with_exposed_provenance` to alert the user of the precision loss.
Default,
/// Like `Default`, but without the warning.
Permissive,
/// We error on `from_exposed_addr`, ensuring no precision loss.
/// We error on `with_exposed_provenance`, ensuring no precision loss.
Strict,
}

8
src/tools/miri/src/diagnostics.rs
View File

@ -66,7 +66,7 @@ impl fmt::Display for TerminationInfo {
Int2PtrWithStrictProvenance =>
write!(
f,
"integer-to-pointer casts and `ptr::from_exposed_addr` are not supported with `-Zmiri-strict-provenance`"
"integer-to-pointer casts and `ptr::with_exposed_provenance` are not supported with `-Zmiri-strict-provenance`"
),
StackedBorrowsUb { msg, .. } => write!(f, "{msg}"),
TreeBorrowsUb { title, .. } => write!(f, "{title}"),
@ -593,7 +593,7 @@ impl<'mir, 'tcx> MiriMachine<'mir, 'tcx> {
(
None,
format!(
"This program is using integer-to-pointer casts or (equivalently) `ptr::from_exposed_addr`,"
"This program is using integer-to-pointer casts or (equivalently) `ptr::with_exposed_provenance`,"
),
),
(
@ -603,7 +603,7 @@ impl<'mir, 'tcx> MiriMachine<'mir, 'tcx> {
(
None,
format!(
"See https://doc.rust-lang.org/nightly/std/ptr/fn.from_exposed_addr.html for more details on that operation."
"See https://doc.rust-lang.org/nightly/std/ptr/fn.with_exposed_provenance.html for more details on that operation."
),
),
(
@ -615,7 +615,7 @@ impl<'mir, 'tcx> MiriMachine<'mir, 'tcx> {
(
None,
format!(
"You can then pass the `-Zmiri-strict-provenance` flag to Miri, to ensure you are not relying on `from_exposed_addr` semantics."
"You can then pass the `-Zmiri-strict-provenance` flag to Miri, to ensure you are not relying on `with_exposed_provenance` semantics."
),
),
(

6
src/tools/miri/src/shims/intrinsics/simd.rs
View File

@ -514,7 +514,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
dest.transmute(this.machine.layouts.uint(dest.layout.size).unwrap(), this)?;
this.write_int(res, &dest)?;
}
"cast" | "as" | "cast_ptr" | "expose_addr" | "from_exposed_addr" => {
"cast" | "as" | "cast_ptr" | "expose_addr" | "with_exposed_provenance" => {
let [op] = check_arg_count(args)?;
let (op, op_len) = this.operand_to_simd(op)?;
let (dest, dest_len) = this.mplace_to_simd(dest)?;
@ -525,7 +525,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
let safe_cast = intrinsic_name == "as";
let ptr_cast = intrinsic_name == "cast_ptr";
let expose_cast = intrinsic_name == "expose_addr";
let from_exposed_cast = intrinsic_name == "from_exposed_addr";
let from_exposed_cast = intrinsic_name == "with_exposed_provenance";
for i in 0..dest_len {
let op = this.read_immediate(&this.project_index(&op, i)?)?;
@ -559,7 +559,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
(ty::RawPtr(..), ty::Int(_) | ty::Uint(_)) if expose_cast =>
this.pointer_expose_address_cast(&op, dest.layout)?,
(ty::Int(_) | ty::Uint(_), ty::RawPtr(..)) if from_exposed_cast =>
this.pointer_from_exposed_address_cast(&op, dest.layout)?,
this.pointer_with_exposed_provenance_cast(&op, dest.layout)?,
// Error otherwise
_ =>
throw_unsup_format!(

2
src/tools/miri/tests/fail/provenance/ptr_int_unexposed.rs
View File

@ -7,6 +7,6 @@ fn main() {
let x_usize: usize = x_ptr.addr();
// Cast back an address that did *not* get exposed.
let ptr = std::ptr::from_exposed_addr::<i32>(x_usize);
let ptr = std::ptr::with_exposed_provenance::<i32>(x_usize);
assert_eq!(unsafe { *ptr }, 3); //~ ERROR: is a dangling pointer
}

2
src/tools/miri/tests/fail/provenance/strict_provenance_cast.rs
View File

@ -3,5 +3,5 @@
fn main() {
let addr = &0 as *const i32 as usize;
let _ptr = std::ptr::from_exposed_addr::<i32>(addr); //~ ERROR: integer-to-pointer casts and `ptr::from_exposed_addr` are not supported
let _ptr = std::ptr::with_exposed_provenance::<i32>(addr); //~ ERROR: integer-to-pointer casts and `ptr::with_exposed_provenance` are not supported
}

6
src/tools/miri/tests/fail/provenance/strict_provenance_cast.stderr
View File

@ -1,8 +1,8 @@
error: unsupported operation: integer-to-pointer casts and `ptr::from_exposed_addr` are not supported with `-Zmiri-strict-provenance`
error: unsupported operation: integer-to-pointer casts and `ptr::with_exposed_provenance` are not supported with `-Zmiri-strict-provenance`
--> $DIR/strict_provenance_cast.rs:LL:CC
|
LL | let _ptr = std::ptr::from_exposed_addr::<i32>(addr);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ integer-to-pointer casts and `ptr::from_exposed_addr` are not supported with `-Zmiri-strict-provenance`
LL | let _ptr = std::ptr::with_exposed_provenance::<i32>(addr);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ integer-to-pointer casts and `ptr::with_exposed_provenance` are not supported with `-Zmiri-strict-provenance`
|
= help: use Strict Provenance APIs (https://doc.rust-lang.org/nightly/std/ptr/index.html#strict-provenance, https://crates.io/crates/sptr) instead
= note: BACKTRACE:

2
src/tools/miri/tests/fail/stacked_borrows/exposed_only_ro.rs
View File

@ -7,6 +7,6 @@ fn main() {
let mut x = 0;
let _fool = &mut x as *mut i32; // this would have fooled the old untagged pointer logic
let addr = (&x as *const i32).expose_addr();
let ptr = std::ptr::from_exposed_addr_mut::<i32>(addr);
let ptr = std::ptr::with_exposed_provenance_mut::<i32>(addr);
unsafe { *ptr = 0 }; //~ ERROR: /write access using <wildcard> .* no exposed tags have suitable permission in the borrow stack/
}

6
src/tools/miri/tests/pass/box.stack.stderr
View File

@ -4,11 +4,11 @@ warning: integer-to-pointer cast
LL | let r2 = ((r as usize) + 0) as *mut i32;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ integer-to-pointer cast
|
= help: This program is using integer-to-pointer casts or (equivalently) `ptr::from_exposed_addr`,
= help: This program is using integer-to-pointer casts or (equivalently) `ptr::with_exposed_provenance`,
= help: which means that Miri might miss pointer bugs in this program.
= help: See https://doc.rust-lang.org/nightly/std/ptr/fn.from_exposed_addr.html for more details on that operation.
= help: See https://doc.rust-lang.org/nightly/std/ptr/fn.with_exposed_provenance.html for more details on that operation.
= help: To ensure that Miri does not miss bugs in your program, use Strict Provenance APIs (https://doc.rust-lang.org/nightly/std/ptr/index.html#strict-provenance, https://crates.io/crates/sptr) instead.
= help: You can then pass the `-Zmiri-strict-provenance` flag to Miri, to ensure you are not relying on `from_exposed_addr` semantics.
= help: You can then pass the `-Zmiri-strict-provenance` flag to Miri, to ensure you are not relying on `with_exposed_provenance` semantics.
= help: Alternatively, the `-Zmiri-permissive-provenance` flag disables this warning.
= note: BACKTRACE:
= note: inside `into_raw` at $DIR/box.rs:LL:CC

6
src/tools/miri/tests/pass/extern_types.stack.stderr
View File

@ -4,11 +4,11 @@ warning: integer-to-pointer cast
LL | let x: &Foo = unsafe { &*(16 as *const Foo) };
| ^^^^^^^^^^^^^^^^^^ integer-to-pointer cast
|
= help: This program is using integer-to-pointer casts or (equivalently) `ptr::from_exposed_addr`,
= help: This program is using integer-to-pointer casts or (equivalently) `ptr::with_exposed_provenance`,
= help: which means that Miri might miss pointer bugs in this program.
= help: See https://doc.rust-lang.org/nightly/std/ptr/fn.from_exposed_addr.html for more details on that operation.
= help: See https://doc.rust-lang.org/nightly/std/ptr/fn.with_exposed_provenance.html for more details on that operation.
= help: To ensure that Miri does not miss bugs in your program, use Strict Provenance APIs (https://doc.rust-lang.org/nightly/std/ptr/index.html#strict-provenance, https://crates.io/crates/sptr) instead.
= help: You can then pass the `-Zmiri-strict-provenance` flag to Miri, to ensure you are not relying on `from_exposed_addr` semantics.
= help: You can then pass the `-Zmiri-strict-provenance` flag to Miri, to ensure you are not relying on `with_exposed_provenance` semantics.
= help: Alternatively, the `-Zmiri-permissive-provenance` flag disables this warning.
= note: BACKTRACE:
= note: inside `main` at $DIR/extern_types.rs:LL:CC

2
src/tools/miri/tests/pass/portable-simd-ptrs.rs
View File

@ -8,5 +8,5 @@ fn main() {
// Pointer casts
let _val: Simd<*const u8, 4> = Simd::<*const i32, 4>::splat(ptr::null()).cast();
let addrs = Simd::<*const i32, 4>::splat(ptr::null()).expose_addr();
let _ptrs = Simd::<*const i32, 4>::from_exposed_addr(addrs);
let _ptrs = Simd::<*const i32, 4>::with_exposed_provenance(addrs);
}

8
src/tools/miri/tests/pass/ptr_int_from_exposed.rs
View File

@ -12,7 +12,7 @@ fn ptr_roundtrip_out_of_bounds() {
let x_usize = x_ptr.wrapping_offset(128).expose_addr();
let ptr = ptr::from_exposed_addr::<i32>(x_usize).wrapping_offset(-128);
let ptr = ptr::with_exposed_provenance::<i32>(x_usize).wrapping_offset(-128);
assert_eq!(unsafe { *ptr }, 3);
}
@ -27,7 +27,7 @@ fn ptr_roundtrip_confusion() {
let x_usize = x_ptr.expose_addr();
let y_usize = y_ptr.expose_addr();
let ptr = ptr::from_exposed_addr::<i32>(y_usize);
let ptr = ptr::with_exposed_provenance::<i32>(y_usize);
let ptr = ptr.with_addr(x_usize);
assert_eq!(unsafe { *ptr }, 0);
}
@ -39,7 +39,7 @@ fn ptr_roundtrip_imperfect() {
let x_usize = x_ptr.expose_addr() + 128;
let ptr = ptr::from_exposed_addr::<u8>(x_usize).wrapping_offset(-128);
let ptr = ptr::with_exposed_provenance::<u8>(x_usize).wrapping_offset(-128);
assert_eq!(unsafe { *ptr }, 3);
}
@ -51,7 +51,7 @@ fn ptr_roundtrip_null() {
let null = x_null_ptr.expose_addr();
assert_eq!(null, 0);
let x_null_ptr_copy = ptr::from_exposed_addr::<i32>(null); // just a roundtrip, so has provenance of x (angelically)
let x_null_ptr_copy = ptr::with_exposed_provenance::<i32>(null); // just a roundtrip, so has provenance of x (angelically)
let x_ptr_copy = x_null_ptr_copy.with_addr(x_ptr.addr()); // addr of x and provenance of x
assert_eq!(unsafe { *x_ptr_copy }, 42);
}

2
src/tools/miri/tests/pass/stacked-borrows/int-to-ptr.rs
View File

@ -39,7 +39,7 @@ fn example(variant: bool) {
// 4 is the "obvious" choice (topmost tag, what we used to do with untagged pointers).
// And indeed if `variant == true` it is the only possible choice.
// But if `variant == false` then 2 is the only possible choice!
let x_wildcard = ptr::from_exposed_addr_mut::<i32>(x_raw2_addr);
let x_wildcard = ptr::with_exposed_provenance_mut::<i32>(x_raw2_addr);
if variant {
// If we picked 2, this will invalidate 3.

6
src/tools/miri/tests/pass/stacked-borrows/issue-miri-2389.stderr
View File

@ -4,11 +4,11 @@ warning: integer-to-pointer cast
LL | let wildcard = &root0 as *const Cell<i32> as usize as *const Cell<i32>;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ integer-to-pointer cast
|
= help: This program is using integer-to-pointer casts or (equivalently) `ptr::from_exposed_addr`,
= help: This program is using integer-to-pointer casts or (equivalently) `ptr::with_exposed_provenance`,
= help: which means that Miri might miss pointer bugs in this program.
= help: See https://doc.rust-lang.org/nightly/std/ptr/fn.from_exposed_addr.html for more details on that operation.
= help: See https://doc.rust-lang.org/nightly/std/ptr/fn.with_exposed_provenance.html for more details on that operation.
= help: To ensure that Miri does not miss bugs in your program, use Strict Provenance APIs (https://doc.rust-lang.org/nightly/std/ptr/index.html#strict-provenance, https://crates.io/crates/sptr) instead.
= help: You can then pass the `-Zmiri-strict-provenance` flag to Miri, to ensure you are not relying on `from_exposed_addr` semantics.
= help: You can then pass the `-Zmiri-strict-provenance` flag to Miri, to ensure you are not relying on `with_exposed_provenance` semantics.
= help: Alternatively, the `-Zmiri-permissive-provenance` flag disables this warning.
= note: BACKTRACE:
= note: inside `main` at $DIR/issue-miri-2389.rs:LL:CC

2
src/tools/miri/tests/pass/stacked-borrows/unknown-bottom-gc.rs
View File

@ -9,7 +9,7 @@ fn main() {
// Expose the allocation and use the exposed pointer, creating an unknown bottom
unsafe {
let p: *mut u8 = ptr::from_exposed_addr::<u8>(ptr.expose_addr()) as *mut u8;
let p: *mut u8 = ptr::with_exposed_provenance::<u8>(ptr.expose_addr()) as *mut u8;
*p = 1;
}

2
tests/mir-opt/building/custom/as_cast.int_to_ptr.built.after.mir
View File

@ -4,7 +4,7 @@ fn int_to_ptr(_1: usize) -> *const i32 {
let mut _0: *const i32;
bb0: {
_0 = _1 as *const i32 (PointerFromExposedAddress);
_0 = _1 as *const i32 (PointerWithExposedProvenance);
return;
}
}

2
tests/mir-opt/const_prop/reify_fn_ptr.main.GVN.diff
View File

@ -16,7 +16,7 @@
_3 = main as fn() (PointerCoercion(ReifyFnPointer));
_2 = move _3 as usize (PointerExposeAddress);
StorageDead(_3);
_1 = move _2 as *const fn() (PointerFromExposedAddress);
_1 = move _2 as *const fn() (PointerWithExposedProvenance);
StorageDead(_2);
StorageDead(_1);
_0 = const ();

2
tests/mir-opt/const_prop/reify_fn_ptr.rs
View File

@ -5,6 +5,6 @@ fn main() {
// CHECK-LABEL: fn main(
// CHECK: [[ptr:_.*]] = main as fn() (PointerCoercion(ReifyFnPointer));
// CHECK: [[addr:_.*]] = move [[ptr]] as usize (PointerExposeAddress);
// CHECK: [[back:_.*]] = move [[addr]] as *const fn() (PointerFromExposedAddress);
// CHECK: [[back:_.*]] = move [[addr]] as *const fn() (PointerWithExposedProvenance);
let _ = main as usize as *const fn();
}

1
tests/ui/async-await/async-is-unwindsafe.rs
View File

@ -11,6 +11,7 @@ fn main() {
is_unwindsafe(async {
//~^ ERROR the type `&mut Context<'_>` may not be safely transferred across an unwind boundary
//~| ERROR the type `&mut (dyn Any + 'static)` may not be safely transferred across an unwind boundary
use std::ptr::null;
use std::task::{Context, RawWaker, RawWakerVTable, Waker};
let waker = unsafe {

43
tests/ui/async-await/async-is-unwindsafe.stderr
View File

@ -6,19 +6,18 @@ LL | is_unwindsafe(async {
| |_____|
| ||
LL | ||
LL | ||
LL | || use std::ptr::null;
LL | || use std::task::{Context, RawWaker, RawWakerVTable, Waker};
... ||
LL | || drop(cx_ref);
LL | || });
| ||_____-^ `&mut Context<'_>` may not be safely transferred across an unwind boundary
| |_____|
| within this `{async block@$DIR/async-is-unwindsafe.rs:12:19: 29:6}`
| within this `{async block@$DIR/async-is-unwindsafe.rs:12:19: 30:6}`
|
= help: within `{async block@$DIR/async-is-unwindsafe.rs:12:19: 29:6}`, the trait `UnwindSafe` is not implemented for `&mut Context<'_>`, which is required by `{async block@$DIR/async-is-unwindsafe.rs:12:19: 29:6}: UnwindSafe`
= note: `UnwindSafe` is implemented for `&Context<'_>`, but not for `&mut Context<'_>`
= help: within `{async block@$DIR/async-is-unwindsafe.rs:12:19: 30:6}`, the trait `UnwindSafe` is not implemented for `&mut Context<'_>`, which is required by `{async block@$DIR/async-is-unwindsafe.rs:12:19: 30:6}: UnwindSafe`
note: future does not implement `UnwindSafe` as this value is used across an await
--> $DIR/async-is-unwindsafe.rs:25:18
--> $DIR/async-is-unwindsafe.rs:26:18
|
LL | let cx_ref = &mut cx;
| ------ has type `&mut Context<'_>` which does not implement `UnwindSafe`
@ -31,6 +30,38 @@ note: required by a bound in `is_unwindsafe`
LL | fn is_unwindsafe(_: impl std::panic::UnwindSafe) {}
| ^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_unwindsafe`
error: aborting due to 1 previous error
error[E0277]: the type `&mut (dyn Any + 'static)` may not be safely transferred across an unwind boundary
--> $DIR/async-is-unwindsafe.rs:12:5
|
LL | is_unwindsafe(async {
| _____^_____________-
| |_____|
| ||
LL | ||
LL | ||
LL | || use std::ptr::null;
... ||
LL | || drop(cx_ref);
LL | || });
| ||_____-^ `&mut (dyn Any + 'static)` may not be safely transferred across an unwind boundary
| |_____|
| within this `{async block@$DIR/async-is-unwindsafe.rs:12:19: 30:6}`
|
= help: within `{async block@$DIR/async-is-unwindsafe.rs:12:19: 30:6}`, the trait `UnwindSafe` is not implemented for `&mut (dyn Any + 'static)`, which is required by `{async block@$DIR/async-is-unwindsafe.rs:12:19: 30:6}: UnwindSafe`
note: future does not implement `UnwindSafe` as this value is used across an await
--> $DIR/async-is-unwindsafe.rs:26:18
|
LL | let mut cx = Context::from_waker(&waker);
| ------ has type `Context<'_>` which does not implement `UnwindSafe`
...
LL | async {}.await; // this needs an inner await point
| ^^^^^ await occurs here, with `mut cx` maybe used later
note: required by a bound in `is_unwindsafe`
--> $DIR/async-is-unwindsafe.rs:3:26
|
LL | fn is_unwindsafe(_: impl std::panic::UnwindSafe) {}
| ^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_unwindsafe`
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.

16
tests/ui/derives/auxiliary/rustc-serialize.rs Normal file
View File

@ -0,0 +1,16 @@
#![crate_type = "lib"]
pub trait Decoder {
type Error;
fn read_enum<T, F>(&mut self, name: &str, f: F) -> Result<T, Self::Error>
where F: FnOnce(&mut Self) -> Result<T, Self::Error>;
fn read_enum_variant<T, F>(&mut self, names: &[&str], f: F)
-> Result<T, Self::Error>
where F: FnMut(&mut Self, usize) -> Result<T, Self::Error>;
}
pub trait Decodable: Sized {
fn decode<D: Decoder>(d: &mut D) -> Result<Self, D::Error>;
}

11
tests/ui/derives/rustc-decodable-issue-123156.rs Normal file
View File

@ -0,0 +1,11 @@
//@ check-pass
//@ edition:2021
//@ aux-build:rustc-serialize.rs
#![crate_type = "lib"]
#![allow(deprecated, soft_unstable)]
extern crate rustc_serialize;
#[derive(RustcDecodable)]
pub enum Foo {}

10
tests/ui/derives/rustc-decodable-issue-123156.stderr Normal file
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@ -0,0 +1,10 @@
Future incompatibility report: Future breakage diagnostic:
warning: use of unstable library feature 'rustc_encodable_decodable': derive macro for `rustc-serialize`; should not be used in new code
--> $DIR/rustc-decodable-issue-123156.rs:10:10
|
LL | #[derive(RustcDecodable)]
| ^^^^^^^^^^^^^^
|
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>

2
tests/ui/lint/lint-strict-provenance-fuzzy-casts.stderr
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@ -4,7 +4,7 @@ error: strict provenance disallows casting integer `usize` to pointer `*const u8
LL | let dangling = 16_usize as *const u8;
| ^^^^^^^^^^^^^^^^^^^^^
|
= help: if you can't comply with strict provenance and don't have a pointer with the correct provenance you can use `std::ptr::from_exposed_addr()` instead
= help: if you can't comply with strict provenance and don't have a pointer with the correct provenance you can use `std::ptr::with_exposed_provenance()` instead
note: the lint level is defined here
--> $DIR/lint-strict-provenance-fuzzy-casts.rs:2:9
|

6
tests/ui/simd/intrinsic/ptr-cast.rs
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@ -5,7 +5,7 @@
extern "rust-intrinsic" {
fn simd_cast_ptr<T, U>(x: T) -> U;
fn simd_expose_addr<T, U>(x: T) -> U;
fn simd_from_exposed_addr<T, U>(x: T) -> U;
fn simd_with_exposed_provenance<T, U>(x: T) -> U;
}
#[derive(Copy, Clone)]
@ -24,10 +24,10 @@ fn main() {
let exposed_addr: V<usize> = simd_expose_addr(const_ptrs);
let from_exposed_addr: V<*mut i8> = simd_from_exposed_addr(exposed_addr);
let with_exposed_provenance: V<*mut i8> = simd_with_exposed_provenance(exposed_addr);
assert!(const_ptrs.0 == [ptr as *const u8, core::ptr::null()]);
assert!(exposed_addr.0 == [ptr as usize, 0]);
assert!(from_exposed_addr.0 == ptrs.0);
assert!(with_exposed_provenance.0 == ptrs.0);
}
}

2
tests/ui/sized/ensure-overriding-bindings-in-pattern-with-ty-err-doesnt-ice.rs
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@ -2,6 +2,6 @@ fn main() {
let str::<{fn str() { let str::T>>::as_bytes; }}, T>::as_bytes;
//~^ ERROR expected a pattern, found an expression
//~| ERROR cannot find type `T` in this scope
//~| ERROR type and const arguments are not allowed on builtin type `str`
//~| ERROR const and type arguments are not allowed on builtin type `str`
//~| ERROR expected unit struct, unit variant or constant, found associated function `str<, T>::as_bytes`
}

4
tests/ui/sized/ensure-overriding-bindings-in-pattern-with-ty-err-doesnt-ice.stderr
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@ -10,11 +10,11 @@ error[E0412]: cannot find type `T` in this scope
LL | let str::<{fn str() { let str::T>>::as_bytes; }}, T>::as_bytes;
| ^ not found in this scope
error[E0109]: type and const arguments are not allowed on builtin type `str`
error[E0109]: const and type arguments are not allowed on builtin type `str`
--> $DIR/ensure-overriding-bindings-in-pattern-with-ty-err-doesnt-ice.rs:2:15
|
LL | let str::<{fn str() { let str::T>>::as_bytes; }}, T>::as_bytes;
| --- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^ type and const arguments not allowed
| --- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^ const and type arguments not allowed
| |
| not allowed on builtin type `str`
|