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2022-10-13std: use `sync::Mutex` for internal staticsjoboet-55/+29
2022-10-13Auto merge of #102655 - joboet:windows_tls_opt, r=ChrisDentonbors-93/+193
Optimize TLS on Windows This implements the suggestion in the current TLS code to embed the linked list of destructors in the `StaticKey` structure to save allocations. Additionally, locking is avoided when no destructor needs to be run. By using one Windows-provided `Once` per key instead of a global lock, locking is more finely-grained (this unblocks #100579).
2022-10-13kmc-solid: Handle errors returned by `SOLID_FS_ReadDir`Tomoaki Kawada-8/+12
2022-10-13Auto merge of #102995 - JohnTitor:rollup-yomkwge, r=JohnTitorbors-1/+1
Rollup of 7 pull requests Successful merges: - #102641 (Support casting boxes to dyn*) - #102836 (rustc_target: Fix json target specs using LLD linker flavors in link args) - #102949 (should-skip-this: add missing backslash) - #102967 (Add test for issue 102964) - #102971 (tidy: error if a lang feature is already present) - #102974 (Fix small word dupe typos) - #102980 (rustdoc: merge separate `.item-info` CSS) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
2022-10-13Auto merge of #102372 - abrown:issue-102157, r=thomccbors-9/+28
Allow compiling the `wasm32-wasi` std library with atomics The issue #102157 demonstrates how currently the `-Z build-std` option will fail when re-compiling the standard library with `RUSTFLAGS` like `RUSTFLAGS="-C target-feature=+atomics,+bulk-memory -C link-args=--shared-memory"`. This change attempts to resolve those build issues by depending on the the WebAssembly `futex` module and providing an implementation for `env_lock`. Fixes #102157.
2022-10-13fix small word dupe typosRageking8-1/+1
2022-10-11fix: return type of single-threaded dummy lock must be droppableAndrew Brown-2/+2
2022-10-11Rollup merge of #102227 - devnexen:solarish_get_path, r=m-ou-seMatthias Krüger-2/+9
fs::get_path solarish version. similar to linux, albeit there is no /proc/self notion on solaris based system thus flattening the difference for simplification sake.
2022-10-10Implement `env_lock` with `RwLock`Andrew Brown-12/+23
Copying the approach of the Unix target, this change uses the standard `RwLock` to protect against concurrent access of libc's environment. This locking is only enabled when WebAssembly's `atomics` feature is also enabled.
2022-10-10Allow compiling the `wasm32-wasi` std library with atomicsAndrew Brown-3/+11
The issue #102157 demonstrates how currently the `-Z build-std` option will fail when re-compiling the standard library with `RUSTFLAGS` like `RUSTFLAGS="-C target-feature=+atomics,+bulk-memory -C link-args=--shared-memory"`. This change attempts to resolve those build issues by depending on the the WebAssembly `futex` module and providing an implementation for `env_lock`. Fixes #102157.
2022-10-10Consolidate AsFd instances for stdio types into `library/std/src/os/fd/owned.rs`Josh Triplett-98/+2
2022-10-09Auto merge of #102850 - JohnTitor:rollup-lze1w03, r=JohnTitorbors-2/+16
Rollup of 8 pull requests Successful merges: - #101118 (fs::get_mode enable getting the data via fcntl/F_GETFL on major BSD) - #102072 (Add `ptr::Alignment` type) - #102799 (rustdoc: remove hover gap in file picker) - #102820 (Show let-else suggestion on stable.) - #102829 (rename `ImplItemKind::TyAlias` to `ImplItemKind::Type`) - #102831 (Don't use unnormalized type in `Ty::fn_sig` call in rustdoc `clean_middle_ty`) - #102834 (Remove unnecessary `lift`/`lift_to_tcx` calls from rustdoc) - #102838 (remove cfg(bootstrap) from Miri) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
2022-10-09impl AsFd for io::{Stdin, Stdout, Stderr}, not the sys versionsJosh Triplett-3/+3
https://github.com/rust-lang/rust/pull/100892 implemented AsFd for the sys versions, rather than for the public types. Change the implementations to apply to the public types.
2022-10-09openbsd: don't reallocate a guard page on the stack.Sébastien Marie-0/+10
the kernel currently enforce that a stack is immutable. calling mmap(2) or mprotect(2) to change it will result in EPERM, which generate a panic!(). so just do like for Linux, and trust the kernel to do the right thing.
2022-10-10Rollup merge of #101118 - devnexen:fs_getmode_bsd, r=Mark-SimulacrumYuki Okushi-2/+16
fs::get_mode enable getting the data via fcntl/F_GETFL on major BSD supporting this flag.
2022-10-09Auto merge of #93668 - SUPERCILEX:path_alloc, r=joshtriplettbors-277/+383
Reduce CString allocations in std as much as possible Currently, every operation involving paths in `fs` allocates memory to hold the path before sending it through the syscall. This PR instead uses a stack allocation (chosen size is somewhat arbitrary) when the path is short before falling back to heap allocations for long paths. Benchmarks show that the stack allocation is ~2x faster for short paths: ``` test sys::unix::fd::tests::bench_heap_path_alloc ... bench: 34 ns/iter (+/- 2) test sys::unix::fd::tests::bench_stack_path_alloc ... bench: 15 ns/iter (+/- 1) ``` For long paths, I couldn't find any measurable difference. --- I'd be surprised if I was the first to think of this, so I didn't fully flush out the PR. If this change is desirable, I'll make use of `run_with_cstr` across all platforms in every fs method (currently just unix open for testing). I also added an `impl From<FromBytesWithNulError>` which is presumably a no-no (or at least needs to be done in another PR). --- Also see https://github.com/nix-rust/nix/pull/1655 with a bunch of discussion where I'm doing something similar.
2022-10-08std: optimize TLS on Windowsjoboet-93/+193
2022-10-08std: do not use dispatch semaphore under miri (yet)joboet-5/+8
2022-10-08std: remove unused linker attributejoboet-1/+1
2022-10-06Don't needless link to `libresolv` on Darwin in libstdThom Chiovoloni-4/+0
2022-10-06std: use semaphore for thread parking on Apple platformsjoboet-1/+140
2022-10-05Revert "Use getentropy when possible on all Apple platforms"BlackHoleFox-56/+38
This reverts commit 3fc35b5b935e390c61ea2bbf744838b2632b2df1.
2022-10-04Auto merge of #101768 - sunfishcode:sunfishcode/wasi-stdio-lock-asfd, ↵bors-0/+27
r=joshtriplett Add `AsFd` implementations for stdio lock types on WASI. This mirrors the implementations on Unix platforms, and also mirrors the existing `AsRawFd` impls. This is similar to #100892, but is for the `*Lock` types.
2022-10-03Reduce CString allocations in std as much as possibleAlex Saveau-277/+383
Signed-off-by: Alex Saveau <saveau.alexandre@gmail.com>
2022-10-03Add SAFETY comments for AsFd implementations on stdin/stdout/stderrJosh Triplett-0/+3
2022-10-03Add stability attributes.Dan Gohman-3/+6
2022-10-01`SetFileTime` doesn't allow setting the file time to `0xFFFF_FFFF_FFFF_FFFF`beetrees-0/+8
2022-10-01Error instead of panicking when setting file times if the passed ↵beetrees-49/+36
`SystemTime` doesn't fit into the required type
2022-09-28Add a niche to `Duration`, unix `SystemTime`, and non-apple `Instant`beetrees-13/+21
2022-09-26fs::get_path solarish version.David Carlier-2/+9
2022-09-25Auto merge of #99609 - workingjubilee:lossy-unix-strerror, r=thomccbors-1/+3
Recover error strings on Unix from_lossy_utf8 Some language settings can result in unreliable UTF-8 being produced. This can result in failing to emit the error string, panicking instead. from_lossy_utf8 allows us to assume these strings usually will be fine. This fixes rust-lang#99535.
2022-09-25Auto merge of #98457 - japaric:gh98378, r=m-ou-sebors-0/+3
make Condvar, Mutex, RwLock const constructors work with the `unsupported` impl applying this patch locally to the `rust-src` component fixes #98378 however, the solution seems wrong to me because PR #97791 didn't add any `rustc_const_stable` attribute to underlying implementations like `std::sys::unix::futex`, so I must be missing something about how const-stability is checked ... maybe the `restricted_std` feature (gate?) has an effect? fixes #98378 fixes #98293 (probably)
2022-09-24Rollup merge of #100823 - WaffleLapkin:less_offsets, r=scottmcmMatthias Krüger-14/+14
Refactor some `std` code that works with pointer offstes This PR replaces `pointer::offset` in standard library with `pointer::add` and `pointer::sub`, [re]moving some casts and using `.addr()` while we are at it. This is a more complicated refactor than all other sibling PRs, so take a closer look when reviewing, please 😃 (though I've checked this multiple times and it looks fine). r? ````@scottmcm```` _split off from #100746, continuation of #100822_
2022-09-24Rollup merge of #102044 - ChrisDenton:BCrypt-system-rand, r=thomccMatthias Krüger-53/+29
Remove `RtlGenRandom` (take two) First try to use the system preferred RNG but if that fails (e.g. due to a broken system configuration) then fallback to manually opening an algorithm handle.
2022-09-22Add `AsFd` implementations for stdio lock types on WASI.Dan Gohman-0/+21
This mirrors the implementations on Unix platforms, and also mirrors the existing `AsRawFd` impls. This is similar to #100892, but is for the `*Lock` types.
2022-09-22Rollup merge of #102036 - Patiga:remove-io-errorkind-other-use-in-std, ↵Dylan DPC-2/+2
r=Mark-Simulacrum Remove use of `io::ErrorKind::Other` in std The documentation states that this `ErrorKind` is not used by the standard library. Instead, `io::ErrorKind::Uncategorized` should be used. The two instances are in the unstable API [linux_pidfd](https://github.com/rust-lang/rust/issues/82971).
2022-09-20Auto merge of #100581 - joboet:sync_rwlock_everywhere, r=thomccbors-12/+12
std: use `sync::RwLock` for internal statics Since `sync::RwLock` is now `const`-constructible, it can be used for internal statics, removing the need for `sys_common::StaticRwLock`. This adds some extra allocations on platforms which need to box their locks (currently SGX and some UNIX), but these will become unnecessary with the lock improvements tracked in #93740.
2022-09-20Remove `RtlGenRandom` (take two)Chris Denton-53/+29
First try to use the system preferred RNG but if that fails (e.g. due to a broken system configuration) then fallback to manually opening an algorithm handle.
2022-09-20Remove use of `io::ErrorKind::Other` in stdPatiga-2/+2
The documentation states that this `ErrorKind` is not used by the standard library. Instead, `io::ErrorKind::Uncategorized` should be used.
2022-09-19std: use `sync::RwLock` for internal staticsjoboet-12/+12
2022-09-11Auto merge of #101442 - joboet:null_check_tcs, r=thomccbors-2/+6
Check if TCS is a null pointer on SGX The `EENTER` instruction only checks if the TCS is aligned, not if it zero. Saying the address returned is a `NonNull<u8>` (for which `Tcs` is a type alias) is unsound. As well-behaved runners will not put the TCS at address zero, so the definition of `Tcs` is correct. However, `std` should check the address before casting it to a `NonNull`. ping `@jethrogb` `@raoulstrackx` `@rustbot` label I-unsound
2022-09-11std: check if TCS is a null pointerjoboet-2/+6
2022-09-11std: use correct clock in `park_timeout` on Horizonjoboet-2/+4
2022-09-11Auto merge of #101482 - joboet:netbsd_parker, r=sanxiynbors-12/+136
Optimize thread parking on NetBSD As the futex syscall is not present in the latest stable release, NetBSD cannot use the efficient thread parker and locks Linux uses. Currently, it therefore relies on a pthread-based parker, consisting of a mutex and semaphore which protect a state variable. NetBSD however has more efficient syscalls available: [`_lwp_park`](https://man.netbsd.org/_lwp_park.2) and [`_lwp_unpark`](https://man.netbsd.org/_lwp_unpark.2). These already provide the exact semantics of `thread::park` and `Thread::unpark`, but work with thread ids. In `std`, this ID is here stored in an atomic state variable, which is also used to optimize cases were the parking token is already available at the time `thread::park` is called. r? `@m-ou-se`
2022-09-10std: optimize thread parking on NetBSDjoboet-12/+136
2022-09-10Explicitly link kernel32.lib from allocChris Denton-0/+1
2022-09-09Auto merge of #101617 - Dylan-DPC:rollup-iiy4ipc, r=Dylan-DPCbors-18/+20
Rollup of 5 pull requests Successful merges: - #101366 (Restore old behaviour on broken UNC paths) - #101492 (Suggest adding array lengths to references to arrays if possible) - #101529 (Fix the example code and doctest for Formatter::sign_plus) - #101573 (update `ParamKindOrd`) - #101612 (Fix code generation of `Rvalue::Repeat` with 128 bit values) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
2022-09-09Rollup merge of #101366 - ChrisDenton:unc-forward-slash, r=m-ou-seDylan DPC-18/+20
Restore old behaviour on broken UNC paths This fixes #101358 by restoring the behaviour from previous stable Rust versions. I'm not convinced this is ultimately right but I think it's less wrong and maybe this should be backported to beta? r? libs
2022-09-09std: use futex-based locks and thread parker on Hermitjoboet-452/+47
2022-09-08Rollup merge of #101423 - mkroening:hermit-warnings, r=sanxiynMichael Goulet-4/+0
Fix hermit warnings This fixes two `unused_imprt` and one `dead_code` warning for hermit.
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