Rework no_coverage to coverage(off)

compiler/rustc_builtin_macros/src/deriving/cmp/eq.rs

@@ -34,7 +34,7 @@ pub fn expand_deriving_eq(
             attributes: thin_vec![
                 cx.attr_word(sym::inline, span),
                 cx.attr_nested_word(sym::doc, sym::hidden, span),
-                cx.attr_word(sym::no_coverage, span)
+                cx.attr_nested_word(sym::coverage, sym::off, span)
             ],
             fieldless_variants_strategy: FieldlessVariantsStrategy::Unify,
             combine_substructure: combine_substructure(Box::new(|a, b, c| {

compiler/rustc_builtin_macros/src/test_harness.rs

@@ -254,7 +254,7 @@ fn generate_test_harness(
     let expn_id = ext_cx.resolver.expansion_for_ast_pass(
         DUMMY_SP,
         AstPass::TestHarness,
-        &[sym::test, sym::rustc_attrs, sym::no_coverage],
+        &[sym::test, sym::rustc_attrs, sym::coverage],
         None,
     );
     let def_site = DUMMY_SP.with_def_site_ctxt(expn_id.to_expn_id());
@@ -335,8 +335,8 @@ fn mk_main(cx: &mut TestCtxt<'_>) -> P<ast::Item> {
 
     // #[rustc_main]
     let main_attr = ecx.attr_word(sym::rustc_main, sp);
-    // #[no_coverage]
+    // #[coverage(off)]
-    let no_coverage_attr = ecx.attr_word(sym::no_coverage, sp);
+    let coverage_attr = ecx.attr_nested_word(sym::coverage, sym::off, sp);
 
     // pub fn main() { ... }
     let main_ret_ty = ecx.ty(sp, ast::TyKind::Tup(ThinVec::new()));
@@ -366,7 +366,7 @@ fn mk_main(cx: &mut TestCtxt<'_>) -> P<ast::Item> {
 
     let main = P(ast::Item {
         ident: main_id,
-        attrs: thin_vec![main_attr, no_coverage_attr],
+        attrs: thin_vec![main_attr, coverage_attr],
         id: ast::DUMMY_NODE_ID,
         kind: main,
         vis: ast::Visibility { span: sp, kind: ast::VisibilityKind::Public, tokens: None },

compiler/rustc_codegen_llvm/src/coverageinfo/mapgen.rs

@@ -317,10 +317,10 @@ fn add_unused_functions(cx: &CodegenCx<'_, '_>) {
     {
         let codegen_fn_attrs = tcx.codegen_fn_attrs(non_codegenned_def_id);
 
-        // If a function is marked `#[no_coverage]`, then skip generating a
+        // If a function is marked `#[coverage(off)]`, then skip generating a
         // dead code stub for it.
         if codegen_fn_attrs.flags.contains(CodegenFnAttrFlags::NO_COVERAGE) {
-            debug!("skipping unused fn marked #[no_coverage]: {:?}", non_codegenned_def_id);
+            debug!("skipping unused fn marked #[coverage(off)]: {:?}", non_codegenned_def_id);
             continue;
         }
 

compiler/rustc_codegen_ssa/messages.ftl

@@ -23,6 +23,8 @@ codegen_ssa_erroneous_constant = erroneous constant encountered
 
 codegen_ssa_error_creating_remark_dir = failed to create remark directory: {$error}
 
+codegen_ssa_expected_coverage_symbol = expected `coverage(off)` or `coverage(on)`
+
 codegen_ssa_expected_used_symbol = expected `used`, `used(compiler)` or `used(linker)`
 
 codegen_ssa_extern_funcs_not_found = some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified

compiler/rustc_codegen_ssa/src/codegen_attrs.rs

@@ -16,7 +16,10 @@ use rustc_target::spec::{abi, SanitizerSet};
 
 use crate::errors;
 use crate::target_features::from_target_feature;
-use crate::{errors::ExpectedUsedSymbol, target_features::check_target_feature_trait_unsafe};
+use crate::{
+    errors::{ExpectedCoverageSymbol, ExpectedUsedSymbol},
+    target_features::check_target_feature_trait_unsafe,
+};
 
 fn linkage_by_name(tcx: TyCtxt<'_>, def_id: LocalDefId, name: &str) -> Linkage {
     use rustc_middle::mir::mono::Linkage::*;
@@ -128,7 +131,21 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
                         .emit();
                 }
             }
-            sym::no_coverage => codegen_fn_attrs.flags |= CodegenFnAttrFlags::NO_COVERAGE,
+            sym::coverage => {
+                let inner = attr.meta_item_list();
+                match inner.as_deref() {
+                    Some([item]) if item.has_name(sym::off) => {
+                        codegen_fn_attrs.flags |= CodegenFnAttrFlags::NO_COVERAGE;
+                    }
+                    Some([item]) if item.has_name(sym::on) => {
+                        // Allow #[coverage(on)] for being explicit, maybe also in future to enable
+                        // coverage on a smaller scope within an excluded larger scopy.
+                    }
+                    Some(_) | None => {
+                        tcx.sess.emit_err(ExpectedCoverageSymbol { span: attr.span });
+                    }
+                }
+            }
             sym::rustc_std_internal_symbol => {
                 codegen_fn_attrs.flags |= CodegenFnAttrFlags::RUSTC_STD_INTERNAL_SYMBOL
             }

compiler/rustc_codegen_ssa/src/errors.rs

@@ -561,6 +561,13 @@ pub struct UnknownArchiveKind<'a> {
     pub kind: &'a str,
 }
 
+#[derive(Diagnostic)]
+#[diag(codegen_ssa_expected_coverage_symbol)]
+pub struct ExpectedCoverageSymbol {
+    #[primary_span]
+    pub span: Span,
+}
+
 #[derive(Diagnostic)]
 #[diag(codegen_ssa_expected_used_symbol)]
 pub struct ExpectedUsedSymbol {

compiler/rustc_error_codes/src/error_codes/E0788.md

@@ -1,4 +1,4 @@
-A `#[no_coverage]` attribute was applied to something which does not show up
+A `#[coverage]` attribute was applied to something which does not show up
 in code coverage, or is too granular to be excluded from the coverage report.
 
 For now, this attribute can only be applied to function, method, and closure
@@ -9,18 +9,18 @@ will just emit an `unused_attributes` lint instead of this error.
 Example of erroneous code:
 
 ```compile_fail,E0788
-#[no_coverage]
+#[coverage(off)]
 struct Foo;
 
-#[no_coverage]
+#[coverage(on)]
 const FOO: Foo = Foo;
 ```
 
-`#[no_coverage]` tells the compiler to not generate coverage instrumentation for
+`#[coverage(off)]` tells the compiler to not generate coverage instrumentation
-a piece of code when the `-C instrument-coverage` flag is passed. Things like
+for a piece of code when the `-C instrument-coverage` flag is passed. Things
-structs and consts are not coverable code, and thus cannot do anything with this
+like structs and consts are not coverable code, and thus cannot do anything
-attribute.
+with this attribute.
 
 If you wish to apply this attribute to all methods in an impl or module,
 manually annotate each method; it is not possible to annotate the entire impl
-with a `#[no_coverage]` attribute.
+with a `#[coverage]` attribute.

compiler/rustc_feature/src/active.rs

@@ -398,6 +398,9 @@ declare_features! (
     (active, const_trait_impl, "1.42.0", Some(67792), None),
     /// Allows the `?` operator in const contexts.
     (active, const_try, "1.56.0", Some(74935), None),
+    /// Allows function attribute `#[coverage(on/off)]`, to control coverage
+    /// instrumentation of that function.
+    (active, coverage, "1.53.0", Some(84605), None),
     /// Allows non-builtin attributes in inner attribute position.
     (active, custom_inner_attributes, "1.30.0", Some(54726), None),
     /// Allows custom test frameworks with `#![test_runner]` and `#[test_case]`.
@@ -509,9 +512,6 @@ declare_features! (
     (active, never_type_fallback, "1.41.0", Some(65992), None),
     /// Allows `#![no_core]`.
     (active, no_core, "1.3.0", Some(29639), None),
-    /// Allows function attribute `#[no_coverage]`, to bypass coverage
-    /// instrumentation of that function.
-    (active, no_coverage, "1.53.0", Some(84605), None),
     /// Allows the use of `no_sanitize` attribute.
     (active, no_sanitize, "1.42.0", Some(39699), None),
     /// Allows using the `non_exhaustive_omitted_patterns` lint.

compiler/rustc_feature/src/builtin_attrs.rs

@@ -395,7 +395,7 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
         template!(List: "address, kcfi, memory, thread"), DuplicatesOk,
         experimental!(no_sanitize)
     ),
-    gated!(no_coverage, Normal, template!(Word), WarnFollowing, experimental!(no_coverage)),
+    gated!(coverage, Normal, template!(Word, List: "on|off"), WarnFollowing, experimental!(coverage)),
 
     ungated!(
         doc, Normal, template!(List: "hidden|inline|...", NameValueStr: "string"), DuplicatesOk

compiler/rustc_middle/src/middle/codegen_fn_attrs.rs

@@ -87,7 +87,7 @@ bitflags! {
         /// #[cmse_nonsecure_entry]: with a TrustZone-M extension, declare a
         /// function as an entry function from Non-Secure code.
         const CMSE_NONSECURE_ENTRY      = 1 << 14;
-        /// `#[no_coverage]`: indicates that the function should be ignored by
+        /// `#[coverage(off)]`: indicates that the function should be ignored by
         /// the MIR `InstrumentCoverage` pass and not added to the coverage map
         /// during codegen.
         const NO_COVERAGE               = 1 << 15;

compiler/rustc_passes/messages.ftl

@@ -113,6 +113,19 @@ passes_continue_labeled_block =
     .label = labeled blocks cannot be `continue`'d
     .block_label = labeled block the `continue` points to
 
+passes_coverage_fn_defn =
+    `#[coverage]` may only be applied to function definitions
+
+passes_coverage_ignored_function_prototype =
+    `#[coverage]` is ignored on function prototypes
+
+passes_coverage_not_coverable =
+    `#[coverage]` must be applied to coverable code
+    .label = not coverable code
+
+passes_coverage_propagate =
+    `#[coverage]` does not propagate into items and must be applied to the contained functions directly
+
 passes_dead_codes =
     { $multiple ->
       *[true] multiple {$descr}s are
@@ -497,19 +510,6 @@ passes_naked_functions_operands =
 passes_naked_tracked_caller =
     cannot use `#[track_caller]` with `#[naked]`
 
-passes_no_coverage_fn_defn =
-    `#[no_coverage]` may only be applied to function definitions
-
-passes_no_coverage_ignored_function_prototype =
-    `#[no_coverage]` is ignored on function prototypes
-
-passes_no_coverage_not_coverable =
-    `#[no_coverage]` must be applied to coverable code
-    .label = not coverable code
-
-passes_no_coverage_propagate =
-    `#[no_coverage]` does not propagate into items and must be applied to the contained functions directly
-
 passes_no_link =
     attribute should be applied to an `extern crate` item
     .label = not an `extern crate` item

compiler/rustc_passes/src/check_attr.rs

@@ -107,7 +107,7 @@ impl CheckAttrVisitor<'_> {
             match attr.name_or_empty() {
                 sym::do_not_recommend => self.check_do_not_recommend(attr.span, target),
                 sym::inline => self.check_inline(hir_id, attr, span, target),
-                sym::no_coverage => self.check_no_coverage(hir_id, attr, span, target),
+                sym::coverage => self.check_coverage(hir_id, attr, span, target),
                 sym::non_exhaustive => self.check_non_exhaustive(hir_id, attr, span, target),
                 sym::marker => self.check_marker(hir_id, attr, span, target),
                 sym::target_feature => self.check_target_feature(hir_id, attr, span, target),
@@ -327,16 +327,10 @@ impl CheckAttrVisitor<'_> {
         }
     }
 
-    /// Checks if a `#[no_coverage]` is applied directly to a function
+    /// Checks if a `#[coverage]` is applied directly to a function
-    fn check_no_coverage(
+    fn check_coverage(&self, hir_id: HirId, attr: &Attribute, span: Span, target: Target) -> bool {
-        &self,
-        hir_id: HirId,
-        attr: &Attribute,
-        span: Span,
-        target: Target,
-    ) -> bool {
         match target {
-            // no_coverage on function is fine
+            // #[coverage] on function is fine
             Target::Fn
             | Target::Closure
             | Target::Method(MethodKind::Trait { body: true } | MethodKind::Inherent) => true,
@@ -347,7 +341,7 @@ impl CheckAttrVisitor<'_> {
                     UNUSED_ATTRIBUTES,
                     hir_id,
                     attr.span,
-                    errors::IgnoredNoCoverageFnProto,
+                    errors::IgnoredCoverageFnProto,
                 );
                 true
             }
@@ -357,7 +351,7 @@ impl CheckAttrVisitor<'_> {
                     UNUSED_ATTRIBUTES,
                     hir_id,
                     attr.span,
-                    errors::IgnoredNoCoveragePropagate,
+                    errors::IgnoredCoveragePropagate,
                 );
                 true
             }
@@ -367,13 +361,13 @@ impl CheckAttrVisitor<'_> {
                     UNUSED_ATTRIBUTES,
                     hir_id,
                     attr.span,
-                    errors::IgnoredNoCoverageFnDefn,
+                    errors::IgnoredCoverageFnDefn,
                 );
                 true
             }
 
             _ => {
-                self.tcx.sess.emit_err(errors::IgnoredNoCoverageNotCoverable {
+                self.tcx.sess.emit_err(errors::IgnoredCoverageNotCoverable {
                     attr_span: attr.span,
                     defn_span: span,
                 });

compiler/rustc_passes/src/errors.rs

@@ -64,20 +64,20 @@ pub struct InlineNotFnOrClosure {
 }
 
 #[derive(LintDiagnostic)]
-#[diag(passes_no_coverage_ignored_function_prototype)]
+#[diag(passes_coverage_ignored_function_prototype)]
-pub struct IgnoredNoCoverageFnProto;
+pub struct IgnoredCoverageFnProto;
 
 #[derive(LintDiagnostic)]
-#[diag(passes_no_coverage_propagate)]
+#[diag(passes_coverage_propagate)]
-pub struct IgnoredNoCoveragePropagate;
+pub struct IgnoredCoveragePropagate;
 
 #[derive(LintDiagnostic)]
-#[diag(passes_no_coverage_fn_defn)]
+#[diag(passes_coverage_fn_defn)]
-pub struct IgnoredNoCoverageFnDefn;
+pub struct IgnoredCoverageFnDefn;
 
 #[derive(Diagnostic)]
-#[diag(passes_no_coverage_not_coverable, code = "E0788")]
+#[diag(passes_coverage_not_coverable, code = "E0788")]
-pub struct IgnoredNoCoverageNotCoverable {
+pub struct IgnoredCoverageNotCoverable {
     #[primary_span]
     pub attr_span: Span,
     #[label]

compiler/rustc_span/src/symbol.rs

@@ -573,6 +573,7 @@ symbols! {
         cosf32,
         cosf64,
         count,
+        coverage,
         cr,
         crate_id,
         crate_in_paths,
@@ -1037,7 +1038,6 @@ symbols! {
         no,
         no_builtins,
         no_core,
-        no_coverage,
         no_crate_inject,
         no_debug,
         no_default_passes,
@@ -1068,6 +1068,7 @@ symbols! {
         note,
         object_safe_for_dispatch,
         of,
+        off,
         offset,
         offset_of,
         omit_gdb_pretty_printer_section,

library/core/src/cmp.rs

@@ -289,7 +289,8 @@ pub trait Eq: PartialEq<Self> {
     //
     // This should never be implemented by hand.
     #[doc(hidden)]
-    #[no_coverage] // rust-lang/rust#84605
+    #[cfg_attr(bootstrap, no_coverage)] // rust-lang/rust#84605
+    #[cfg_attr(not(bootstrap), coverage(off))] //
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
     fn assert_receiver_is_total_eq(&self) {}
@@ -298,7 +299,9 @@ pub trait Eq: PartialEq<Self> {
 /// Derive macro generating an impl of the trait [`Eq`].
 #[rustc_builtin_macro]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
-#[allow_internal_unstable(core_intrinsics, derive_eq, structural_match, no_coverage)]
+#[allow_internal_unstable(core_intrinsics, derive_eq, structural_match)]
+#[cfg_attr(bootstrap, allow_internal_unstable(no_coverage))]
+#[cfg_attr(not(bootstrap), allow_internal_unstable(coverage))]
 pub macro Eq($item:item) {
     /* compiler built-in */
 }

library/core/src/lib.rs

@@ -110,6 +110,8 @@
 //
 // Library features:
 // tidy-alphabetical-start
+#![cfg_attr(bootstrap, feature(no_coverage))] // rust-lang/rust#84605
+#![cfg_attr(not(bootstrap), feature(coverage))] // rust-lang/rust#84605
 #![feature(char_indices_offset)]
 #![feature(const_align_of_val)]
 #![feature(const_align_of_val_raw)]
@@ -235,7 +237,6 @@
 #![feature(negative_impls)]
 #![feature(never_type)]
 #![feature(no_core)]
-#![feature(no_coverage)] // rust-lang/rust#84605
 #![feature(platform_intrinsics)]
 #![feature(prelude_import)]
 #![feature(repr_simd)]

src/doc/rustc/src/instrument-coverage.md

@@ -173,9 +173,9 @@ Some of the more notable options in this example include:
 [`llvm-cov report`]: https://llvm.org/docs/CommandGuide/llvm-cov.html#llvm-cov-report
 [`llvm-cov show`]: https://llvm.org/docs/CommandGuide/llvm-cov.html#llvm-cov-show
 
-> **Note**: Coverage can also be disabled on an individual function by annotating the function with the [`no_coverage` attribute] (which requires the feature flag `#![feature(no_coverage)]`).
+> **Note**: Coverage can also be disabled on an individual function by annotating the function with the [`coverage(off)` attribute] (which requires the feature flag `#![feature(coverage)]`).
 
-[`no_coverage` attribute]: ../unstable-book/language-features/no-coverage.html
+[`coverage` attribute]: ../unstable-book/language-features/coverage.html
 
 ## Interpreting reports
 

src/doc/unstable-book/src/language-features/coverage.md

@@ -1,4 +1,4 @@
-# `no_coverage`
+# `coverage`
 
 The tracking issue for this feature is: [#84605]
 
@@ -6,7 +6,7 @@ The tracking issue for this feature is: [#84605]
 
 ---
 
-The `no_coverage` attribute can be used to selectively disable coverage
+The `coverage` attribute can be used to selectively disable coverage
 instrumentation in an annotated function. This might be useful to:
 
 -   Avoid instrumentation overhead in a performance critical function
@@ -16,14 +16,14 @@ instrumentation in an annotated function. This might be useful to:
 ## Example
 
 ```rust
-#![feature(no_coverage)]
+#![feature(coverage)]
 
 // `foo()` will get coverage instrumentation (by default)
 fn foo() {
   // ...
 }
 
-#[no_coverage]
+#[coverage(off)]
 fn bar() {
   // ...
 }

src/tools/rust-analyzer/crates/hir-def/src/attr/builtin.rs

@@ -239,7 +239,7 @@ pub const INERT_ATTRIBUTES: &[BuiltinAttribute] = &[
         template!(List: "address, kcfi, memory, thread"), DuplicatesOk,
         experimental!(no_sanitize)
     ),
-    gated!(no_coverage, Normal, template!(Word), WarnFollowing, experimental!(no_coverage)),
+    gated!(coverage, Normal, template!(Word, List: "on|off"), WarnFollowing, experimental!(coverage)),
 
     ungated!(
         doc, Normal, template!(List: "hidden|inline|...", NameValueStr: "string"), DuplicatesOk

src/tools/rust-analyzer/crates/ide-db/src/generated/lints.rs

@@ -3505,8 +3505,8 @@ This serves two purposes:
 "##,
     },
     Lint {
-        label: "no_coverage",
+        label: "coverage",
-        description: r##"# `no_coverage`
+        description: r##"# `coverage`
 
 The tracking issue for this feature is: [#84605]
 
@@ -3514,7 +3514,7 @@ The tracking issue for this feature is: [#84605]
 
 ---
 
-The `no_coverage` attribute can be used to selectively disable coverage
+The `coverage` attribute can be used to selectively disable coverage
 instrumentation in an annotated function. This might be useful to:
 
 -   Avoid instrumentation overhead in a performance critical function
@@ -3524,14 +3524,14 @@ instrumentation in an annotated function. This might be useful to:
 ## Example
 
 ```rust
-#![feature(no_coverage)]
+#![feature(coverage)]
 
 // `foo()` will get coverage instrumentation (by default)
 fn foo() {
   // ...
 }
 
-#[no_coverage]
+#[coverage(off)]
 fn bar() {
   // ...
 }

tests/pretty/tests-are-sorted.pp

@@ -79,7 +79,7 @@ pub const a_test: test::TestDescAndFn =
     };
 fn a_test() {}
 #[rustc_main]
-#[no_coverage]
+#[coverage(off)]
 pub fn main() -> () {
     extern crate test;
     test::test_main_static(&[&a_test, &m_test, &z_test])

tests/ui/deriving/deriving-all-codegen.stdout

@@ -60,7 +60,7 @@ impl ::core::marker::StructuralEq for Empty { }
 impl ::core::cmp::Eq for Empty {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {}
 }
 #[automatically_derived]
@@ -135,7 +135,7 @@ impl ::core::marker::StructuralEq for Point { }
 impl ::core::cmp::Eq for Point {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {
         let _: ::core::cmp::AssertParamIsEq<u32>;
     }
@@ -221,7 +221,7 @@ impl ::core::marker::StructuralEq for PackedPoint { }
 impl ::core::cmp::Eq for PackedPoint {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {
         let _: ::core::cmp::AssertParamIsEq<u32>;
     }
@@ -334,7 +334,7 @@ impl ::core::marker::StructuralEq for Big { }
 impl ::core::cmp::Eq for Big {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {
         let _: ::core::cmp::AssertParamIsEq<u32>;
     }
@@ -500,7 +500,7 @@ impl ::core::marker::StructuralEq for Unsized { }
 impl ::core::cmp::Eq for Unsized {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {
         let _: ::core::cmp::AssertParamIsEq<[u32]>;
     }
@@ -615,7 +615,7 @@ impl<T: ::core::cmp::Eq + Trait, U: ::core::cmp::Eq> ::core::cmp::Eq for
     Generic<T, U> where T::A: ::core::cmp::Eq {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {
         let _: ::core::cmp::AssertParamIsEq<T>;
         let _: ::core::cmp::AssertParamIsEq<T::A>;
@@ -738,7 +738,7 @@ impl<T: ::core::cmp::Eq + ::core::marker::Copy + Trait, U: ::core::cmp::Eq +
     T::A: ::core::cmp::Eq + ::core::marker::Copy {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {
         let _: ::core::cmp::AssertParamIsEq<T>;
         let _: ::core::cmp::AssertParamIsEq<T::A>;
@@ -821,7 +821,7 @@ impl ::core::marker::StructuralEq for Enum0 { }
 impl ::core::cmp::Eq for Enum0 {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {}
 }
 #[automatically_derived]
@@ -892,7 +892,7 @@ impl ::core::marker::StructuralEq for Enum1 { }
 impl ::core::cmp::Eq for Enum1 {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {
         let _: ::core::cmp::AssertParamIsEq<u32>;
     }
@@ -959,7 +959,7 @@ impl ::core::marker::StructuralEq for Fieldless1 { }
 impl ::core::cmp::Eq for Fieldless1 {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {}
 }
 #[automatically_derived]
@@ -1034,7 +1034,7 @@ impl ::core::marker::StructuralEq for Fieldless { }
 impl ::core::cmp::Eq for Fieldless {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {}
 }
 #[automatically_derived]
@@ -1142,7 +1142,7 @@ impl ::core::marker::StructuralEq for Mixed { }
 impl ::core::cmp::Eq for Mixed {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {
         let _: ::core::cmp::AssertParamIsEq<u32>;
         let _: ::core::cmp::AssertParamIsEq<Option<u32>>;
@@ -1270,7 +1270,7 @@ impl ::core::marker::StructuralEq for Fielded { }
 impl ::core::cmp::Eq for Fielded {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {
         let _: ::core::cmp::AssertParamIsEq<u32>;
         let _: ::core::cmp::AssertParamIsEq<bool>;
@@ -1393,7 +1393,7 @@ impl<T: ::core::cmp::Eq, U: ::core::cmp::Eq> ::core::cmp::Eq for
     EnumGeneric<T, U> {
     #[inline]
     #[doc(hidden)]
-    #[no_coverage]
+    #[coverage(off)]
     fn assert_receiver_is_total_eq(&self) -> () {
         let _: ::core::cmp::AssertParamIsEq<T>;
         let _: ::core::cmp::AssertParamIsEq<U>;

tests/ui/feature-gates/feature-gate-coverage.rs

@@ -1,12 +1,12 @@
 #![crate_type = "lib"]
 
-#[derive(PartialEq, Eq)] // ensure deriving `Eq` does not enable `feature(no_coverage)`
+#[derive(PartialEq, Eq)] // ensure deriving `Eq` does not enable `feature(coverage)`
 struct Foo {
     a: u8,
     b: u32,
 }
 
-#[no_coverage] //~ ERROR the `#[no_coverage]` attribute is an experimental feature
+#[coverage(off)] //~ ERROR the `#[coverage]` attribute is an experimental feature
 fn requires_feature_no_coverage() -> bool {
     let bar = Foo { a: 0, b: 0 };
     bar == Foo { a: 0, b: 0 }

tests/ui/feature-gates/feature-gate-coverage.stderr

@@ -0,0 +1,12 @@
+error[E0658]: the `#[coverage]` attribute is an experimental feature
+  --> $DIR/feature-gate-coverage.rs:9:1
+   |
+LL | #[coverage(off)]
+   | ^^^^^^^^^^^^^^^^
+   |
+   = note: see issue #84605 <https://github.com/rust-lang/rust/issues/84605> for more information
+   = help: add `#![feature(coverage)]` to the crate attributes to enable
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0658`.

tests/ui/feature-gates/feature-gate-no_coverage.stderr

@@ -1,12 +0,0 @@
-error[E0658]: the `#[no_coverage]` attribute is an experimental feature
-  --> $DIR/feature-gate-no_coverage.rs:9:1
-   |
-LL | #[no_coverage]
-   | ^^^^^^^^^^^^^^
-   |
-   = note: see issue #84605 <https://github.com/rust-lang/rust/issues/84605> for more information
-   = help: add `#![feature(no_coverage)]` to the crate attributes to enable
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0658`.

tests/ui/lint/no-coverage.rs

@@ -1,55 +1,55 @@
 #![feature(extern_types)]
-#![feature(no_coverage)]
+#![feature(coverage)]
 #![feature(impl_trait_in_assoc_type)]
 #![warn(unused_attributes)]
-#![no_coverage]
+#![coverage(off)]
-//~^ WARN: `#[no_coverage]` does not propagate into items and must be applied to the contained functions directly
+//~^ WARN: `#[coverage]` does not propagate into items and must be applied to the contained functions directly
 
-#[no_coverage]
+#[coverage(off)]
-//~^ WARN: `#[no_coverage]` does not propagate into items and must be applied to the contained functions directly
+//~^ WARN: `#[coverage]` does not propagate into items and must be applied to the contained functions directly
 trait Trait {
-    #[no_coverage] //~ ERROR `#[no_coverage]` must be applied to coverable code
+    #[coverage(off)] //~ ERROR `#[coverage]` must be applied to coverable code
     const X: u32;
 
-    #[no_coverage] //~ ERROR `#[no_coverage]` must be applied to coverable code
+    #[coverage(off)] //~ ERROR `#[coverage]` must be applied to coverable code
     type T;
 
     type U;
 }
 
-#[no_coverage]
+#[coverage(off)]
-//~^ WARN: `#[no_coverage]` does not propagate into items and must be applied to the contained functions directly
+//~^ WARN: `#[coverage]` does not propagate into items and must be applied to the contained functions directly
 impl Trait for () {
     const X: u32 = 0;
 
-    #[no_coverage] //~ ERROR `#[no_coverage]` must be applied to coverable code
+    #[coverage(off)] //~ ERROR `#[coverage]` must be applied to coverable code
     type T = Self;
 
-    #[no_coverage] //~ ERROR `#[no_coverage]` must be applied to coverable code
+    #[coverage(off)] //~ ERROR `#[coverage]` must be applied to coverable code
     type U = impl Trait; //~ ERROR unconstrained opaque type
 }
 
 extern "C" {
-    #[no_coverage] //~ ERROR `#[no_coverage]` must be applied to coverable code
+    #[coverage(off)] //~ ERROR `#[coverage]` must be applied to coverable code
     static X: u32;
 
-    #[no_coverage] //~ ERROR `#[no_coverage]` must be applied to coverable code
+    #[coverage(off)] //~ ERROR `#[coverage]` must be applied to coverable code
     type T;
 }
 
-#[no_coverage]
+#[coverage(off)]
 fn main() {
-    #[no_coverage]
+    #[coverage(off)]
-    //~^ WARN `#[no_coverage]` may only be applied to function definitions
+    //~^ WARN `#[coverage]` may only be applied to function definitions
     let _ = ();
 
     match () {
-        #[no_coverage]
+        #[coverage(off)]
-        //~^ WARN `#[no_coverage]` may only be applied to function definitions
+        //~^ WARN `#[coverage]` may only be applied to function definitions
         () => (),
     }
 
-    #[no_coverage]
+    #[coverage(off)]
-    //~^ WARN `#[no_coverage]` may only be applied to function definitions
+    //~^ WARN `#[coverage]` may only be applied to function definitions
     return ();
 }

tests/ui/lint/no-coverage.stderr

@@ -1,8 +1,8 @@
-warning: `#[no_coverage]` does not propagate into items and must be applied to the contained functions directly
+warning: `#[coverage]` does not propagate into items and must be applied to the contained functions directly
   --> $DIR/no-coverage.rs:8:1
    |
-LL | #[no_coverage]
+LL | #[coverage(off)]
-   | ^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^
    |
 note: the lint level is defined here
   --> $DIR/no-coverage.rs:4:9
@@ -10,83 +10,83 @@ note: the lint level is defined here
 LL | #![warn(unused_attributes)]
    |         ^^^^^^^^^^^^^^^^^
 
-warning: `#[no_coverage]` does not propagate into items and must be applied to the contained functions directly
+warning: `#[coverage]` does not propagate into items and must be applied to the contained functions directly
   --> $DIR/no-coverage.rs:20:1
    |
-LL | #[no_coverage]
+LL | #[coverage(off)]
-   | ^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^
 
-warning: `#[no_coverage]` may only be applied to function definitions
+warning: `#[coverage]` may only be applied to function definitions
   --> $DIR/no-coverage.rs:42:5
    |
-LL |     #[no_coverage]
+LL |     #[coverage(off)]
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^
 
-warning: `#[no_coverage]` may only be applied to function definitions
+warning: `#[coverage]` may only be applied to function definitions
   --> $DIR/no-coverage.rs:47:9
    |
-LL |         #[no_coverage]
+LL |         #[coverage(off)]
-   |         ^^^^^^^^^^^^^^
+   |         ^^^^^^^^^^^^^^^^
 
-warning: `#[no_coverage]` may only be applied to function definitions
+warning: `#[coverage]` may only be applied to function definitions
   --> $DIR/no-coverage.rs:52:5
    |
-LL |     #[no_coverage]
+LL |     #[coverage(off)]
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^
 
-error[E0788]: `#[no_coverage]` must be applied to coverable code
+error[E0788]: `#[coverage]` must be applied to coverable code
   --> $DIR/no-coverage.rs:11:5
    |
-LL |     #[no_coverage]
+LL |     #[coverage(off)]
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^
 LL |     const X: u32;
    |     ------------- not coverable code
 
-error[E0788]: `#[no_coverage]` must be applied to coverable code
+error[E0788]: `#[coverage]` must be applied to coverable code
   --> $DIR/no-coverage.rs:14:5
    |
-LL |     #[no_coverage]
+LL |     #[coverage(off)]
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^
 LL |     type T;
    |     ------- not coverable code
 
-error[E0788]: `#[no_coverage]` must be applied to coverable code
+error[E0788]: `#[coverage]` must be applied to coverable code
   --> $DIR/no-coverage.rs:25:5
    |
-LL |     #[no_coverage]
+LL |     #[coverage(off)]
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^
 LL |     type T = Self;
    |     -------------- not coverable code
 
-error[E0788]: `#[no_coverage]` must be applied to coverable code
+error[E0788]: `#[coverage]` must be applied to coverable code
   --> $DIR/no-coverage.rs:28:5
    |
-LL |     #[no_coverage]
+LL |     #[coverage(off)]
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^
 LL |     type U = impl Trait;
    |     -------------------- not coverable code
 
-error[E0788]: `#[no_coverage]` must be applied to coverable code
+error[E0788]: `#[coverage]` must be applied to coverable code
   --> $DIR/no-coverage.rs:33:5
    |
-LL |     #[no_coverage]
+LL |     #[coverage(off)]
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^
 LL |     static X: u32;
    |     -------------- not coverable code
 
-error[E0788]: `#[no_coverage]` must be applied to coverable code
+error[E0788]: `#[coverage]` must be applied to coverable code
   --> $DIR/no-coverage.rs:36:5
    |
-LL |     #[no_coverage]
+LL |     #[coverage(off)]
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^
 LL |     type T;
    |     ------- not coverable code
 
-warning: `#[no_coverage]` does not propagate into items and must be applied to the contained functions directly
+warning: `#[coverage]` does not propagate into items and must be applied to the contained functions directly
   --> $DIR/no-coverage.rs:5:1
    |
-LL | #![no_coverage]
+LL | #![coverage(off)]
-   | ^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^^
 
 error: unconstrained opaque type
   --> $DIR/no-coverage.rs:29:14