diff options
Diffstat (limited to 'compiler/rustc_mir_build/src')
| -rw-r--r-- | compiler/rustc_mir_build/src/check_unsafety.rs | 46 | ||||
| -rw-r--r-- | compiler/rustc_mir_build/src/errors.rs | 35 |
2 files changed, 75 insertions, 6 deletions
diff --git a/compiler/rustc_mir_build/src/check_unsafety.rs b/compiler/rustc_mir_build/src/check_unsafety.rs index b6cf7a40ecd..60cd49b88b4 100644 --- a/compiler/rustc_mir_build/src/check_unsafety.rs +++ b/compiler/rustc_mir_build/src/check_unsafety.rs @@ -461,14 +461,18 @@ impl<'a, 'tcx> Visitor<'a, 'tcx> for UnsafetyVisitor<'a, 'tcx> { }; self.requires_unsafe(expr.span, CallToUnsafeFunction(func_id)); } else if let &ty::FnDef(func_did, _) = self.thir[fun].ty.kind() { - // If the called function has target features the calling function hasn't, + // If the called function has explicit target features the calling function hasn't, // the call requires `unsafe`. Don't check this on wasm // targets, though. For more information on wasm see the // is_like_wasm check in hir_analysis/src/collect.rs + // Implicit target features are OK because they are either a consequence of some + // explicit target feature (which is checked to be present in the caller) or + // come from a witness argument. let callee_features = &self.tcx.codegen_fn_attrs(func_did).target_features; if !self.tcx.sess.target.options.is_like_wasm && !callee_features.iter().all(|feature| { - self.body_target_features.iter().any(|f| f.name == feature.name) + feature.implied + || self.body_target_features.iter().any(|f| f.name == feature.name) }) { let missing: Vec<_> = callee_features @@ -542,10 +546,16 @@ impl<'a, 'tcx> Visitor<'a, 'tcx> for UnsafetyVisitor<'a, 'tcx> { user_ty: _, fields: _, base: _, - }) => match self.tcx.layout_scalar_valid_range(adt_def.did()) { - (Bound::Unbounded, Bound::Unbounded) => {} - _ => self.requires_unsafe(expr.span, InitializingTypeWith), - }, + }) => { + match self.tcx.layout_scalar_valid_range(adt_def.did()) { + (Bound::Unbounded, Bound::Unbounded) => {} + _ => self.requires_unsafe(expr.span, InitializingTypeWith), + } + if !self.tcx.struct_target_features(adt_def.did()).is_empty() { + self.requires_unsafe(expr.span, ConstructingTargetFeaturesType) + } + } + ExprKind::Closure(box ClosureExpr { closure_id, args: _, @@ -647,6 +657,7 @@ enum UnsafeOpKind { CallToUnsafeFunction(Option<DefId>), UseOfInlineAssembly, InitializingTypeWith, + ConstructingTargetFeaturesType, UseOfMutableStatic, UseOfExternStatic, DerefOfRawPointer, @@ -728,6 +739,15 @@ impl UnsafeOpKind { unsafe_not_inherited_note, }, ), + ConstructingTargetFeaturesType => tcx.emit_node_span_lint( + UNSAFE_OP_IN_UNSAFE_FN, + hir_id, + span, + UnsafeOpInUnsafeFnInitializingTypeWithTargetFeatureRequiresUnsafe { + span, + unsafe_not_inherited_note, + }, + ), UseOfMutableStatic => tcx.emit_node_span_lint( UNSAFE_OP_IN_UNSAFE_FN, hir_id, @@ -885,6 +905,20 @@ impl UnsafeOpKind { unsafe_not_inherited_note, }); } + ConstructingTargetFeaturesType if unsafe_op_in_unsafe_fn_allowed => { + dcx.emit_err( + InitializingTypeWithTargetFeatureRequiresUnsafeUnsafeOpInUnsafeFnAllowed { + span, + unsafe_not_inherited_note, + }, + ); + } + ConstructingTargetFeaturesType => { + dcx.emit_err(InitializingTypeWithTargetFeatureRequiresUnsafe { + span, + unsafe_not_inherited_note, + }); + } UseOfMutableStatic if unsafe_op_in_unsafe_fn_allowed => { dcx.emit_err(UseOfMutableStaticRequiresUnsafeUnsafeOpInUnsafeFnAllowed { span, diff --git a/compiler/rustc_mir_build/src/errors.rs b/compiler/rustc_mir_build/src/errors.rs index 7f9eefd1d52..e7d6239aa9b 100644 --- a/compiler/rustc_mir_build/src/errors.rs +++ b/compiler/rustc_mir_build/src/errors.rs @@ -87,6 +87,16 @@ pub(crate) struct UnsafeOpInUnsafeFnInitializingTypeWithRequiresUnsafe { } #[derive(LintDiagnostic)] +#[diag(mir_build_unsafe_op_in_unsafe_fn_initializing_type_with_target_feature_requires_unsafe, code = E0133)] +#[note] +pub(crate) struct UnsafeOpInUnsafeFnInitializingTypeWithTargetFeatureRequiresUnsafe { + #[label] + pub(crate) span: Span, + #[subdiagnostic] + pub(crate) unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>, +} + +#[derive(LintDiagnostic)] #[diag(mir_build_unsafe_op_in_unsafe_fn_mutable_static_requires_unsafe, code = E0133)] #[note] pub(crate) struct UnsafeOpInUnsafeFnUseOfMutableStaticRequiresUnsafe { @@ -251,6 +261,17 @@ pub(crate) struct InitializingTypeWithRequiresUnsafe { } #[derive(Diagnostic)] +#[diag(mir_build_initializing_type_with_target_feature_requires_unsafe, code = E0133)] +#[note] +pub(crate) struct InitializingTypeWithTargetFeatureRequiresUnsafe { + #[primary_span] + #[label] + pub(crate) span: Span, + #[subdiagnostic] + pub(crate) unsafe_not_inherited_note: Option<UnsafeNotInheritedNote>, +} + +#[derive(Diagnostic)] #[diag( mir_build_initializing_type_with_requires_unsafe_unsafe_op_in_unsafe_fn_allowed, code = E0133 @@ -265,6 +286,20 @@ pub(crate) struct InitializingTypeWithRequiresUnsafeUnsafeOpInUnsafeFnAllowed { } #[derive(Diagnostic)] +#[diag( + mir_build_initializing_type_with_target_feature_requires_unsafe_unsafe_op_in_unsafe_fn_allowed, + code = E0133 +)] +#[note] +pub(crate) struct InitializingTypeWithTargetFeatureRequiresUnsafeUnsafeOpInUnsafeFnAllowed { + #[primary_span] + #[label] + pub(crate) span: Span, + #[subdiagnostic] + pub(crate) unsafe_not_inherited_note: Option<UnsafeNotInheritedNote>, +} + +#[derive(Diagnostic)] #[diag(mir_build_mutable_static_requires_unsafe, code = E0133)] #[note] pub(crate) struct UseOfMutableStaticRequiresUnsafe { |