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Implement unwind safety for Condvar on all platforms #121768
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Closes rust-lang#118009 This commit adds unwind safety to Condvar. Previously, only select platforms implemented unwind safety through auto traits. Known by this committer: Linux was unwind safe, but Mac and Windows are not before this change.
Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @Mark-Simulacrum (or someone else) some time within the next two weeks. Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (
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@ecton There's no way to gate an implementation of a trait, only a type's stability and a trait's stability. Thus an impl of a stable trait for a stable type is "instantly stable" (modulo the train, etc.). Formally, this would usually require an FCP to resolve, however I think we may be justified in expediting this process a little, given the circumstances... |
Since it affects stable API @rustbot label -T-libs T-libs-api |
Yeah this is just a bugfix, since these implementations already exist as stable on Linux. The stable documentaiton lists these unconditionally, since it is generated on Linux. We tend to not pay much attention to (Ref)UnwindSafe, and also not always pay enough attention to non-Linux platforms, so that's how these bugs happen. Thanks for the fix! @bors r rollup cc @rust-lang/libs-api |
Implement unwind safety for Condvar on all platforms Closes rust-lang#118009 This commit adds unwind safety consistency to Condvar. Previously, only select platforms implemented unwind safety through auto traits. Known by this committer: On Linux, `Condvar` implemented `UnwindSafe` but on Mac and Windows, it did not. This change changes the implementation from auto to explicit. In rust-lang#118009, it was suggested that the platform differences were a bug and that a simple PR could address this. In trying to determine the best information to put in the `#[stable]` attribute, it [was suggested](rust-lang#121690 (comment)) I copy the stability information from the previous unwind safety implementations.
Rollup of 11 pull requests Successful merges: - rust-lang#119748 (Increase visibility of `join_path` and `split_paths`) - rust-lang#120291 (Have `String` use `SliceIndex` impls from `str`) - rust-lang#121130 (Suggest moving definition if non-found macro_rules! is defined later) - rust-lang#121723 (Two diagnostic things) - rust-lang#121740 (Changing some attributes to only_local.) - rust-lang#121745 (Deeply normalize obligations in `refining_impl_trait`) - rust-lang#121748 (Restore the standard library review rotation to its former glory) - rust-lang#121768 (Implement unwind safety for Condvar on all platforms ) - rust-lang#121777 (Fix typo in `rustc_passes/messages.ftl`) - rust-lang#121778 (Document potential memory leak in unbounded channel) - rust-lang#121779 (Remove unused diagnostic struct) r? `@ghost` `@rustbot` modify labels: rollup
Rollup of 10 pull requests Successful merges: - rust-lang#119748 (Increase visibility of `join_path` and `split_paths`) - rust-lang#120291 (Have `String` use `SliceIndex` impls from `str`) - rust-lang#121723 (Two diagnostic things) - rust-lang#121740 (Changing some attributes to only_local.) - rust-lang#121745 (Deeply normalize obligations in `refining_impl_trait`) - rust-lang#121748 (Restore the standard library review rotation to its former glory) - rust-lang#121768 (Implement unwind safety for Condvar on all platforms ) - rust-lang#121777 (Fix typo in `rustc_passes/messages.ftl`) - rust-lang#121778 (Document potential memory leak in unbounded channel) - rust-lang#121779 (Remove unused diagnostic struct) r? `@ghost` `@rustbot` modify labels: rollup
Rollup merge of rust-lang#121768 - ecton:condvar-unwindsafe, r=m-ou-se Implement unwind safety for Condvar on all platforms Closes rust-lang#118009 This commit adds unwind safety consistency to Condvar. Previously, only select platforms implemented unwind safety through auto traits. Known by this committer: On Linux, `Condvar` implemented `UnwindSafe` but on Mac and Windows, it did not. This change changes the implementation from auto to explicit. In rust-lang#118009, it was suggested that the platform differences were a bug and that a simple PR could address this. In trying to determine the best information to put in the `#[stable]` attribute, it [was suggested](rust-lang#121690 (comment)) I copy the stability information from the previous unwind safety implementations.
Pkgsrc changes: * Adapt checksums and patches, some have beene intregrated upstream. Upstream chnages: Version 1.78.0 (2024-05-02) =========================== Language -------- - [Stabilize `#[cfg(target_abi = ...)]`] (rust-lang/rust#119590) - [Stabilize the `#[diagnostic]` namespace and `#[diagnostic::on_unimplemented]` attribute] (rust-lang/rust#119888) - [Make async-fn-in-trait implementable with concrete signatures] (rust-lang/rust#120103) - [Make matching on NaN a hard error, and remove the rest of `illegal_floating_point_literal_pattern`] (rust-lang/rust#116284) - [static mut: allow mutable reference to arbitrary types, not just slices and arrays] (rust-lang/rust#117614) - [Extend `invalid_reference_casting` to include references casting to bigger memory layout] (rust-lang/rust#118983) - [Add `non_contiguous_range_endpoints` lint for singleton gaps after exclusive ranges] (rust-lang/rust#118879) - [Add `wasm_c_abi` lint for use of older wasm-bindgen versions] (rust-lang/rust#117918) This lint currently only works when using Cargo. - [Update `indirect_structural_match` and `pointer_structural_match` lints to match RFC] (rust-lang/rust#120423) - [Make non-`PartialEq`-typed consts as patterns a hard error] (rust-lang/rust#120805) - [Split `refining_impl_trait` lint into `_reachable`, `_internal` variants] (rust-lang/rust#121720) - [Remove unnecessary type inference when using associated types inside of higher ranked `where`-bounds] (rust-lang/rust#119849) - [Weaken eager detection of cyclic types during type inference] (rust-lang/rust#119989) - [`trait Trait: Auto {}`: allow upcasting from `dyn Trait` to `dyn Auto`] (rust-lang/rust#119338) Compiler -------- - [Made `INVALID_DOC_ATTRIBUTES` lint deny by default] (rust-lang/rust#111505) - [Increase accuracy of redundant `use` checking] (rust-lang/rust#117772) - [Suggest moving definition if non-found macro_rules! is defined later] (rust-lang/rust#121130) - [Lower transmutes from int to pointer type as gep on null] (rust-lang/rust#121282) Target changes: - [Windows tier 1 targets now require at least Windows 10] (rust-lang/rust#115141) - [Enable CMPXCHG16B, SSE3, SAHF/LAHF and 128-bit Atomics in tier 1 Windows] (rust-lang/rust#120820) - [Add `wasm32-wasip1` tier 2 (without host tools) target] (rust-lang/rust#120468) - [Add `wasm32-wasip2` tier 3 target] (rust-lang/rust#119616) - [Rename `wasm32-wasi-preview1-threads` to `wasm32-wasip1-threads`] (rust-lang/rust#122170) - [Add `arm64ec-pc-windows-msvc` tier 3 target] (rust-lang/rust#119199) - [Add `armv8r-none-eabihf` tier 3 target for the Cortex-R52] (rust-lang/rust#110482) - [Add `loongarch64-unknown-linux-musl` tier 3 target] (rust-lang/rust#121832) Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. Libraries --------- - [Bump Unicode to version 15.1.0, regenerate tables] (rust-lang/rust#120777) - [Make align_offset, align_to well-behaved in all cases] (rust-lang/rust#121201) - [PartialEq, PartialOrd: document expectations for transitive chains] (rust-lang/rust#115386) - [Optimize away poison guards when std is built with panic=abort] (rust-lang/rust#100603) - [Replace pthread `RwLock` with custom implementation] (rust-lang/rust#110211) - [Implement unwind safety for Condvar on all platforms] (rust-lang/rust#121768) - [Add ASCII fast-path for `char::is_grapheme_extended`] (rust-lang/rust#121138) Stabilized APIs --------------- - [`impl Read for &Stdin`] (https://doc.rust-lang.org/stable/std/io/struct.Stdin.html#impl-Read-for-&Stdin) - [Accept non `'static` lifetimes for several `std::error::Error` related implementations] (rust-lang/rust#113833) - [Make `impl<Fd: AsFd>` impl take `?Sized`] (rust-lang/rust#114655) - [`impl From<TryReserveError> for io::Error`] (https://doc.rust-lang.org/stable/std/io/struct.Error.html#impl-From-for-Error ) These APIs are now stable in const contexts: - [`Barrier::new()`] (https://doc.rust-lang.org/stable/std/sync/struct.Barrier.html#method.new) Cargo ----- - [Stabilize lockfile v4](rust-lang/cargo#12852) - [Respect `rust-version` when generating lockfile] (rust-lang/cargo#12861) - [Control `--charset` via auto-detecting config value] (rust-lang/cargo#13337) - [Support `target.<triple>.rustdocflags` officially] (rust-lang/cargo#13197) - [Stabilize global cache data tracking] (rust-lang/cargo#13492) Misc ---- - [rustdoc: add `--test-builder-wrapper` arg to support wrappers such as RUSTC_WRAPPER when building doctests] (rust-lang/rust#114651) Compatibility Notes ------------------- - [Many unsafe precondition checks now run for user code with debug assertions enabled] (rust-lang/rust#120863) This change helps users catch undefined behavior in their code, though the details of how much is checked are generally not stable. - [riscv only supports split_debuginfo=off for now] (rust-lang/rust#120518) - [Consistently check bounds on hidden types of `impl Trait`] (rust-lang/rust#121679) - [Change equality of higher ranked types to not rely on subtyping] (rust-lang/rust#118247) - [When called, additionally check bounds on normalized function return type] (rust-lang/rust#118882) - [Expand coverage for `arithmetic_overflow` lint] (rust-lang/rust#119432) Internal Changes ---------------- These changes do not affect any public interfaces of Rust, but they represent significant improvements to the performance or internals of rustc and related tools. - [Update to LLVM 18](rust-lang/rust#120055) - [Build `rustc` with 1CGU on `x86_64-pc-windows-msvc`] (rust-lang/rust#112267) - [Build `rustc` with 1CGU on `x86_64-apple-darwin`] (rust-lang/rust#112268) - [Introduce `run-make` V2 infrastructure, a `run_make_support` library and port over 2 tests as example] (rust-lang/rust#113026) - [Windows: Implement condvar, mutex and rwlock using futex] (rust-lang/rust#121956)
Closes #118009
This commit adds unwind safety consistency to Condvar. Previously, only select platforms implemented unwind safety through auto traits. Known by this committer: On Linux,
Condvar
implementedUnwindSafe
but on Mac and Windows, it did not. This change changes the implementation from auto to explicit.In #118009, it was suggested that the platform differences were a bug and that a simple PR could address this. In trying to determine the best information to put in the
#[stable]
attribute, it was suggested I copy the stability information from the previous unwind safety implementations.