Rollup of 6 pull requests #141208
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Rollup of 6 pull requests #141208
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TLS is not async-signal-safe, making its use in the signal handler used to detect stack overflows unsound (c.f. rust-lang#133698). POSIX however lists two thread-specific identifiers that can be obtained in a signal handler: the current `pthread_t` and the address of `errno`. Since `pthread_equal` is not AS-safe, `pthread_t` should be considered opaque, so for our purposes, `&errno` is the only option. This however works nicely: we can use the address as a key into a map that stores information for each thread. This PR uses a `BTreeMap` protected by a spin lock to hold the guard page address and thread name and thus fixes rust-lang#133698.
Signed-off-by: onur-ozkan <[email protected]>
Co-authored-by: Ookiineko <[email protected]>
Signed-off-by: onur-ozkan <[email protected]>
Use the existing Lemire (decimal -> float) and Dragon / Grisu algorithms (float -> decimal) to add support for `f16`. This allows updating the implementation for `Display` to the expected behavior for `Display` (currently it prints the a hex bitwise representation), matching other floats, and adds a `FromStr` implementation. In order to avoid crashes when compiling with Cranelift or on targets where f16 is not well supported, a fallback is used if `cfg(target_has_reliable_f16)` is not true.
Extend the existing tests for `f32` and `f64` with versions that include `f16`'s new printing and parsing implementations. Co-authored-by: Speedy_Lex <[email protected]>
This requires a fix to the subnormal test to cap the maximum allowed value within the maximum mantissa.
…Simulacrum Add `f16` formatting and parsing Use the same algorithms as for `f32` and `f64` to implement `f16` parsing and printing. try-job: aarch64-gnu try-job: dist-s390x-linux try-job: x86_64-mingw-1 try-job: x86_64-mingw-2
Cygwin support in rustc This PR builds host rustc targeting cygwin. - [x] rust-lang/stacker#122 - [x] nagisa/rust_libloading#173 - [x] Detegr/rust-ctrlc#131 - [x] rust-random/getrandom#654 - [x] msys2/MSYS2-packages#5350 - [x] rust-lang#140886 - [x] rust-lang#140921 - [x] rust-lang#140973 Currently supported: * rustc * rustdoc * rustfmt * clippy Blocking: * cargo: blocked by rust-lang/socket2#568 * rust-analyzer: needs `cargo update`, fixed upstream ``` $ rustc --version --verbose rustc 1.88.0-dev binary: rustc commit-hash: unknown commit-date: unknown host: x86_64-pc-cygwin release: 1.88.0-dev LLVM version: 20.1.4 ```
…imulacrum std: stop using TLS in signal handler TLS is not async-signal-safe, making its use in the signal handler used to detect stack overflows unsound (c.f. rust-lang#133698). POSIX however lists two thread-specific identifiers that can be obtained in a signal handler: the current `pthread_t` and the address of `errno`. Since `pthread_equal` is not AS-safe, `pthread_t` should be considered opaque, so for our purposes, `&errno` is the only option. This however works nicely: we can use the address as a key into a map that stores information for each thread. This PR uses a `BTreeMap` protected by a spin lock to hold the guard page address and thread name and thus fixes rust-lang#133698.
Remove #![feature(let_chains)] from library and src/librustdoc PR rust-lang#132833 has stabilized the `let_chains` feature. This PR removes the last occurences from the library, the compiler, and librustdoc (also because rust-lang#140887 missed the conditional in one of the crates as it was behind the "rustc" feature). We keep `core` as exercise for the future as updating it is non-trivial (see PR thread).
…larsan68 replace `cc_detect::cc2ar` with `cc::try_get_archiver` ~~Awaiting new release of [cc](https://crates.io/crates/cc) version with rust-lang/cc-rs#1456 to bump the version.~~ ~~Blocked by rust-lang/cc-rs#1456 Kind a self-explanatory.
…rsan68,jieyouxu bump windows crate for compiler,bootstrap and tools This dedupes crate versions. For `x86_64-pc-windows-msvc` stage1 cuts few kb from `rustc_driver.dll`, nice.
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Rollup of 6 pull requests Successful merges: - rust-lang#127013 (Add `f16` formatting and parsing) - rust-lang#140154 (Cygwin support in rustc) - rust-lang#140628 (std: stop using TLS in signal handler) - rust-lang#140966 (Remove #![feature(let_chains)] from library and src/librustdoc) - rust-lang#140994 (replace `cc_detect::cc2ar` with `cc::try_get_archiver`) - rust-lang#141127 (bump windows crate for compiler,bootstrap and tools) r? `@ghost` `@rustbot` modify labels: rollup
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Successful merges:
f16formatting and parsing #127013 (Addf16formatting and parsing)cc_detect::cc2arwithcc::try_get_archiver#140994 (replacecc_detect::cc2arwithcc::try_get_archiver)r? @ghost
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