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Stabilize `path_file_prefix` feature
This stabilises `Path::file_prefix`, following the FCP in [tracking issue ](https://github.com/rust-lang/rust/issues/86319)
(FCP ended almost a year ago, so if it's needed for proccess we could rerun it)
Closes: https://github.com/rust-lang/rust/issues/86319
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LorrensP-2158466:miri-float-nondet-foreign-items, r=RalfJung"
This reverts commit 71f04692c32e181ab566c01942f1418dec8662d4, reversing
changes made to 995ca3e532b48b689567533e6b736675e38b741e.
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r=RalfJung
Miri: non-deterministic floating point operations in `foreign_items`
Part of [rust-lang/miri/#3555](https://github.com/rust-lang/miri/issues/3555#issue-2278914000), this pr does the `foreign_items` work.
Some things have changed since rust-lang/rust#138062 and rust-lang/rust#142514. I moved the "helpers" used for creating fixed outputs and clamping operations to their defined ranges to `math.rs`. These are now also extended to handle the floating-point operations in `foreign_items`. Tests in `miri/tests/float.rs` were changed/added.
Failing tests in `std` were extracted, run under miri with `-Zmiri-many-seeds=0..1000` and changed accordingly. Double checked with `-Zmiri-many-seeds`.
I noticed that the C standard doesn't specify the output ranges for all of its mathematical operations; it just specifies them as:
```
Returns
The sinh functions return sinh x.
```
So I used [Wolfram|Alpha](https://www.wolframalpha.com/).
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Adds tests for the `nonpoison::Mutex` variant by using a macro to
duplicate the existing `poison` tests.
Note that all of the tests here are adapted from the existing `poison`
tests.
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This commit simply helps discern the actual changes needed to test both
poison and nonpoison locks.
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Specialize sleep_until implementation for unix (except mac)
related tracking issue: https://github.com/rust-lang/rust/issues/113752
Supersedes https://github.com/rust-lang/rust/pull/118480 for the reasons see: https://github.com/rust-lang/rust/issues/113752#issuecomment-2902594469
Replaces the generic catch all implementation with target_os specific ones for: linux/netbsd/freebsd/android/solaris/illumos etc. Other platforms like wasi, macos/ios/tvos/watchos and windows will follow in later separate PR's (once this is merged).
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Using clock nanosleep leads to more accurate sleep times on platforms
where it is supported.
To enable using clock_nanosleep this makes `sleep_until` platform
specific. That unfortunatly requires identical placeholder
implementations for the other platforms (windows/mac/wasm etc).
we will land platform specific implementations for those later. See the
`sleep_until` tracking issue.
This requires an accessors for the Instant type. As that accessor is only
used on the platforms that have clock_nanosleep it is marked as allow_unused.
32bit time_t targets do not use clock_nanosleep atm, they instead rely
on the same placeholder as the other platforms. We could make them
use clock_nanosleep too in the future using `__clock_nanosleep_time64`.
__clock_nanosleep_time64 is documented at:
https://www.gnu.org/software/libc/manual/html_node/64_002dbit-time-symbol-handling.html
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Handle win32 separator for cygwin paths
This PR handles a issue that cygwin actually supports Win32 path, so we need to handle the Win32 prefix and separaters.
r? `@mati865`
cc `@jeremyd2019`
~~Not sure if I should handle the prefix like the windows target... Cygwin *does* support win32 paths directly going through the APIs, but I think it's not the recommended way.~~
Here I just use `cygwin_conv_path` because it handles both cygwin and win32 paths correctly and convert them into absolute POSIX paths.
UPDATE: Windows path prefix is handled.
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This recently spuriously failed in a rollup, so I think we can afford to
increase the base timeout and the amount of time slept for to provide
a much wider margin for the timeout to be reached.
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Enable Non-determinism of float operations in Miri and change std tests
Links to [#4208](https://github.com/rust-lang/miri/issues/4208) and [#3555](https://github.com/rust-lang/miri/issues/3555) in Miri.
Non-determinism of floating point operations was disabled in rust-lang/rust#137594 because it breaks the tests and doc-tests in core/coretests and std. This PR enables some of them.
This pr includes the following changes:
- Enables the float non-determinism but with a lower relative error of 4ULP instead of 16ULP
- These operations now have a fixed output based on the C23 standard, except the pow operations, this is tracked in [#4286](https://github.com/rust-lang/miri/issues/4286#issue-3010677983)
- Changes tests that made incorrect assumptions about the operations, not to make that assumption anymore (from `assert_eq!` to `assert_approx_eq!`.
- Changed the doctests of the stdlib of these operations to compare against fixed constants instead of `f*::EPSILON`, which now succeed with Miri and `-Zmiri-many-seeds`
- Added a constant `APPROX_DELTA` in `std/tests/floats/f32.rs` which is used for approximation tests, but with a different value when run in Miri. This is to make these tests succeed.
- Added tests in the float tests of Miri to test the C23 behaviour.
Fixes https://github.com/rust-lang/miri/issues/4208
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`stress_recv_timeout_two_threads`, in the mpmc and mpsc testsuites,
is a stress test of the `recv_timeout` function. This test processes and
ignores timeouts, and just ensures that every sent value gets received.
As such, the exact length of the timeouts is not critical, only that
the timeout and sleep durations ensure that at least one timeout
occurred.
The current tests have 100 iterations, half of which sleep for 200ms,
causing the test to take 10s. This represents around 2/3rds of the
*total* runtime of the `library/std` testsuite.
Reduce this to 50 iterations where half of them sleep for 10ms, causing
the test to take 0.25s.
Add a check that at least one timeout occurred.
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change tests in std, core and coretests.
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additional edge cases tests for `path.rs` 🧪
This pull request adds a few new edge case tests to the `std::path` module. The new tests cover scenarios such as paths with only separators, non-ASCII and Unicode characters, embedded new lines, etc. Each new test is documented with some helpful in-line comments as well.
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The previous commit moved all test files from `std` to `core` so git
understands the move. Not all functionality is actually testable in
`core`, however, so perform move the relevant portions back. Changes
from inherent to module methods is also done since this is the form of
math operations available in `core` (as `core_float_math`).
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Many float-related tests in `std` only depend on `core`, so move the
tests there. This also allows us to verify functions from
`core_float_math`.
Since the majority of test files need to be moved to `coretests`, move
the files here without any cleanup; this is done in a followup commit.
This makes git history slightly cleaner, but coretests will not build
immediately after this commit.
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1. analogous to std::cell::Ref(Mut)::filter_map.
2. doesn't imply `Try` genericizability.
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New compiler configuration has been introduced that is designed to
replace the build script configuration `reliable_f16`, `reliable_f128`,
`reliable_f16_math`, and `reliable_f128_math`. Do this replacement here,
which allows us to clean up `std`'s build script.
All tests are gated by `#[cfg(bootstrap)]` rather than doing a more
complicated `cfg(bootstrap)` / `cfg(not(bootstrap))` split since the
next beta split is within two weeks.
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Ref: https://github.com/rust-lang/rust/issues/126840#issuecomment-2802321146
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fix pthread-based tls on apple targets
Tries to fix #127773.
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Mark some std tests as requiring `panic = "unwind"`
This allows these test modules to pass on builds/targets without unwinding support, where `panic = "abort"` - the ignored tests are for functionality that's not supported on those targets.
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Stablize anonymous pipe
Since #135822 is staled, I create this PR to stablise anonymous pipe
Closes #127154
try-job: test-various
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Add `From<{integer}>` for `f16`/`f128` impls
This PR adds `impl From<{bool,i8,u8}> for f16` and `impl From<{bool,i8,u8,i16,u16,i32,u32}> for f128`.
The `From<{i64,u64}> for f128` impls are left commented out as adding them would allow using `f128` on stable before it is stabilised like in the following example:
```rust
fn f<T: From<u64>>(x: T) -> T { x }
fn main() {
let x = f(1.0); // the type of the literal is inferred to be `f128`
}
```
None of the impls added in this PR have this issue as they are all, at minimum, also implemented by `f64`.
This PR will need a crater run for the `From<{i32,u32}>` impls, as `f64` is no longer the only float type to implement them (similar to the cause of #125198).
cc `@bjoernager`
r? `@tgross35`
Tracking issue: #116909
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r=Mark-Simulacrum
expose `is_s390x_feature_detected!` from `std::arch`
tracking issue: https://github.com/rust-lang/rust/issues/135413
implementation: https://github.com/rust-lang/stdarch/pull/1699 (more features added in https://github.com/rust-lang/stdarch/pull/1720)
This macro was part of the recent `stdarch` synchronization, but not yet exposed via `std::arch`.
r? libs
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Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>
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The LLVM issue [1] was fixed with [2], which is included in the LLVM20
upgrade. Tests no longer fail, so enable them here.
[1]: https://github.com/llvm/llvm-project/pull/98681
[2]: https://github.com/llvm/llvm-project/pull/98681
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This allows these test modules to pass on builds/targets without
unwinding support, where `panic = "abort"` - the ignored tests are for
functionality that's not supported on those targets.
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ignore win_delete_self test in Miri
Follow-up to https://github.com/rust-lang/rust/pull/134679, fixes miri-test-libstd on Windows
Cc `@ChrisDenton` `@Mark-Simulacrum`
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