Stabilize `cfg_target_abi`
This stabilizes the `cfg` option called `target_abi`:
```rust
#[cfg(target_abi = "eabihf")]
```
Tracking issue: #80970fixes#78791resolves#80970
speed up `x install` by skipping archiving and compression
Performing archiving and compression on `x install` is nothing more than a waste of time and resources. Additionally, for systems like gentoo(which uses `x install`) this should be highly beneficial.
[benchmark report](https://github.com/rust-lang/rust/pull/118724#issuecomment-1848964908)
Resolves#109308
r? Mark-Simulacrum (I think you want to review this, feel free to change it if otherwise.)
Implement `MappedMutexGuard`, `MappedRwLockReadGuard`, and `MappedRwLockWriteGuard`.
ACP: https://github.com/rust-lang/libs-team/issues/260
Tracking issue: https://github.com/rust-lang/rust/issues/117108
<details> <summary> (Outdated) </summary>
`MutexState`/`RwLockState` structs
~~Having `sys::(Mutex|RwLock)` and `poison::Flag` as separate fields in the `Mutex`/`RwLock` would require `MappedMutexGuard`/`MappedRwLockWriteGuard` to hold an additional pointer, so I combined the two fields into a `MutexState`/`RwLockState` struct. This should not noticeably affect perf or layout, but requires an additional field projection when accessing the former `.inner` or `.poison` fields (now `.state.inner` and `.state.poison`).~~ If this is not desired, then `MappedMutexGuard`/`MappedRwLockWriteGuard` can instead hold separate pointers to the two fields.
</details>
The doc-comments are mostly copied from the existing `*Guard` doc-comments, with some parts from `lock_api::Mapped*Guard`'s doc-comments.
Unresolved question: Are more tests needed?
Add `#[rustc_no_mir_inline]` for standard library UB checks
should help with #121110 and also with #120848
Because the MIR inliner cannot know whether the checks are enabled or not, so inlining is an unnecessary compile time pessimization when debug assertions are disabled. LLVM knows whether they are enabled or not, so it can optimize accordingly without wasting time.
r? `@saethlin`
Forbid use of `extern "C-unwind"` inside standard library
Those libraries are build with `-C panic=unwind` and is expected to be linkable to `-C panic=abort` library. To ensure unsoundness compiler needs to prevent a `C-unwind` call to exist, as doing so may leak foreign exceptions into `-C panic=abort`.
r? ``@RalfJung``
Fix incorrect doc of ScopedJoinHandle::is_finished
Fixes the explanation how to use `is_finished` to achieve a non-blocking join. The updated version matches the documentation of the non-scoped JoinHandle::is_finished.
promotion: don't promote int::MIN / -1
Looks like I entirely forgot about this case when adding the div-by-zero check, which was supposed to ensure that we never promote operations that can fail...
Cc https://github.com/rust-lang/rust/issues/80619
This is a breaking change, so needs a crater run.
r? ``@oli-obk``
match lowering: Split off `test_candidates` into several functions and improve comments
The logic of `test_candidates` has three steps: pick a test, sort the candidates, and generate code for everything. So I split it off into three methods.
I also ended up reworking the comments that explain the algorithm. In particular I added detailed examples. I removed the digression about https://github.com/rust-lang/rust/issues/29740 because it's no longer relevant to how the code is structured today.
r? ``@matthewjasper``
Add examples for some methods on slices
Adds some examples to some methods on slice.
`is_empty` didn't have an example for an empty slice, even though `str` and the collections all have one, so I added that in.
`first_mut` and `last_mut` didn't have an example for what happens when the slice is empty, whereas `first` and `last` do, so I added that too.
Rollup of 7 pull requests
Successful merges:
- #121435 (Account for RPITIT in E0310 explicit lifetime constraint suggestion)
- #121490 (Rustdoc: include crate name in links for local primitives)
- #121520 (delay cloning of iterator items)
- #121522 (check that simd_insert/extract indices are in-bounds)
- #121531 (Ignore less tests in debug builds)
- #121539 (compiler/rustc_target/src/spec/base/apple/tests.rs: Avoid unnecessary large move)
- #121542 (update stdarch)
r? `@ghost`
`@rustbot` modify labels: rollup
compiletest: call cargo-miri directly rather than via 'cargo run'
Fixes https://github.com/rust-lang/miri/issues/3297. Thanks to `@bjorn3` for figuring out the cause of this.
r? `@oli-obk`
Add "cargo miri clean" command
My first reaction when my miri cache was messed up was to attempt run this, which obviously failed. This helps paper over platform differences and such.
Windows miri-script execution egronomics
This allows for Windows users to use miri-script without pain. As working on miri earlier I was doing
`.\miri-script\target\debug\miri-script.exe { install | build | ... }` which wasn't fun.
Those libraries are build with `-C panic=unwind` and is expected to
be linkable to `-C panic=abort` library. To ensure unsoundness
compiler needs to prevent a `C-unwind` call to exist, as doing so may leak
foreign exceptions into `-C panic=abort`.
compiler/rustc_target/src/spec/base/apple/tests.rs: Avoid unnecessary large move
Fixes:
$ MAGIC_EXTRA_RUSTFLAGS=-Zmove-size-limit=4096 ./x test compiler/rustc_target
error: moving 6216 bytes
--> compiler/rustc_target/src/spec/base/apple/tests.rs:17:19
|
17 | for target in all_sim_targets {
| ^^^^^^^^^^^^^^^ value moved from here
|
= note: The current maximum size is 4096, but it can be customized with the move_size_limit attribute: `#![move_size_limit = "..."]`
= note: `-D large-assignments` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(large_assignments)]`
Part of https://github.com/rust-lang/rust/issues/83518
The goal is to enable the lint by default at one point. There are many cases where it needs to be allowed. But here we don't need to allow it. We can simply fix it.
I don't want to enable the lint in the file, because I don't want the "default size threshold for when a value is OK to move" to be duplicated in many places. We'll want the threshold in one central place once we enable it by default.
Ignore less tests in debug builds
Since https://github.com/rust-lang/rust/pull/120594 and https://github.com/rust-lang/rust/pull/120863, nearly all UB-detecting debug assertions get compiled out of code that is monomorphized by a crate built with debug assertions disabled.
Which means that if we default all our codegen tests to `-Cdebug-assertions=no`, most of them work just fine against a sysroot built with debug assertions.
I also tried to explain a bit better why some tests need to be skipped, for those that still need to be skipped.
Rustdoc: include crate name in links for local primitives
Fixes#121106.
This change makes links to primitives easier to use when the path of the page where they will be embedded is not known beforehand such as when we generate impls dynamically from the `register_type_impls` method in `main.js`, which is exactly what is happening in #121106.
An example to show the effect of this change: earlier, if the current page in `cx.current` inside `primitive_link_fragment()` was `std::simd::prelude::Simd` the generated path would be `../../primitive.<prim>.html`. Now it would be `../../../std/primitive.<prim>.html` instead.
A side effect of the change is that local primitive links _everywhere_ will now contain the crate name, even outside of the dynamic situation mentioned above. I'm not sure if there are any major downsides of that other than making the links a bit longer. Ideally I wanted to restrict this behaviour change to only the dynamic cases. We could have achieved that by passing an additional bool arg to `primitive_link_fragment()`, but it felt awkward to do so. Any alternative suggestions are welcome.
Account for RPITIT in E0310 explicit lifetime constraint suggestion
When given
```rust
trait Original {
fn f() -> impl Fn();
}
trait Erased {
fn f(&self) -> Box<dyn Fn()>;
}
impl<T: Original> Erased for T {
fn f(&self) -> Box<dyn Fn()> {
Box::new(<T as Original>::f())
}
}
```
emit do not emit an invalid suggestion restricting the `Trait::{opaque}` type in a `where` clause:
```
error[E0310]: the associated type `<T as Original>::{opaque#0}` may not live long enough
--> $DIR/missing-static-bound-from-impl.rs:11:9
|
LL | Box::new(<T as Original>::f())
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| |
| the associated type `<T as Original>::{opaque#0}` must be valid for the static lifetime...
| ...so that the type `impl Fn()` will meet its required lifetime bounds
```
Partially address #119773. Ideally we'd suggest modifying `Erased::f` instead.
r? `@compiler-errors`
Add short flag -V for consistency with other rust tooling
Minor change to add the `-V` short flag to `rust-analyzer` to bring it in-line with other rust tooling such as:
> rustc -V
```bash
rustc 1.76.0 (07dca489a 2024-02-04)
```
> rustup -V
```bash
rustup 1.26.0 (5af9b9484 2023-04-05)
info: This is the version for the rustup toolchain manager, not the rustc compiler.
info: The currently active `rustc` version is `rustc 1.76.0 (07dca489a 2024-02-04)`
```
> cargo -V
```bash
cargo 1.76.0 (c84b36747 2024-01-18)
```
Fixes:
$ MAGIC_EXTRA_RUSTFLAGS=-Zmove-size-limit=4096 ./x test compiler/rustc_target
error: moving 6216 bytes
--> compiler/rustc_target/src/spec/base/apple/tests.rs:17:19
|
17 | for target in all_sim_targets {
| ^^^^^^^^^^^^^^^ value moved from here
|
= note: The current maximum size is 4096, but it can be customized with the move_size_limit attribute: `#![move_size_limit = "..."]`
= note: `-D large-assignments` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(large_assignments)]`
It makes the link easier to use in cases in which
the path of the page where it will be embedded is not
known beforehand such as when we generate impls
dynamically from `register_type_impls` method in
`main.js`
Earlier for local primitives we would generate a path
that was relative to the current page depth passed in `cx.current`
. e.g if the current page was `std::simd::prelude::Simd` the
generated path would be `../../primitive.<prim>.html` After this
change the path will first take you to the the wesite root and add
the crate name. e.g. for `std::simd::prelude::Simd` the path now
will be `../../../std/primitive.<prim>.html`
Fixes the explanation how to use is_finished to achieve a non-blocking
join. The updated version matches the documentation of the non-scoped
JoinHandle::is_finished.
