ci: Upgrade non-dist Linux testers from ubuntu:16.04 to 22.04
The main goal of updating to 22.04 is to get away from `llvm.allow-old-toolchain`.
A side benefit is that they can also use the system `cmake` instead of building one.
compiler/rustc_codegen_ssa/src/mir/place.rs: Remove LLVM bug workaround
This memset was inserted as a workaround to Rust issue #34427, which was
an LLVM bug that apparently no longer manifests.
Replace `rustc_data_structures::thin_vec::ThinVec` with `thin_vec::ThinVec`
`rustc_data_structures::thin_vec::ThinVec` looks like this:
```
pub struct ThinVec<T>(Option<Box<Vec<T>>>);
```
It's just a zero word if the vector is empty, but requires two
allocations if it is non-empty. So it's only usable in cases where the
vector is empty most of the time.
This commit removes it in favour of `thin_vec::ThinVec`, which is also
word-sized, but stores the length and capacity in the same allocation as
the elements. It's good in a wider variety of situation, e.g. in enum
variants where the vector is usually/always non-empty.
The commit also:
- Sorts some `Cargo.toml` dependency lists, to make additions easier.
- Sorts some `use` item lists, to make additions easier.
- Changes `clean_trait_ref_with_bindings` to take a
`ThinVec<TypeBinding>` rather than a `&[TypeBinding]`, because this
avoid some unnecessary allocations.
r? `@spastorino`
Fix a bunch of typo
This PR will fix some typos detected by [typos].
I only picked the ones I was sure were spelling errors to fix, mostly in
the comments.
[typos]: https://github.com/crate-ci/typos
proc_macro/bridge: send diagnostics over the bridge as a struct
This removes some RPC when creating and emitting diagnostics, and
simplifies the bridge slightly.
After this change, there are no remaining methods which take advantage
of the support for `&mut` references to objects in the store as
arguments, meaning that support for them could technically be removed if
we wanted. The only remaining uses of immutable references into the
store are `TokenStream` and `SourceFile`.
r? `@eddyb`
lint: avoid linting diag functions with diag lints
Functions annotated with `#[rustc_lint_diagnostics]` are used by the diagnostic migration lints to know when to lint, but functions that are annotated with this attribute shouldn't themselves be linted.
cc #100717https://github.com/rust-lang/rust/pull/101041#discussion_r959303706
Link “? operator” to relevant chapter in The Book
Before, the text simply asked people to use a symbol which is hard to
search for. Now the text links back to the chapter on error
propagation in The Book. That should help people find the relevant
keywords for further searches.
Fix uintended diagnostic caused by `drain(..)`
Calling `drain(..)` makes later `suggestable_variants.is_empty()` always true, which makes the diagnostics unintended.
migrate rustc_query_system to use SessionDiagnostic
issues:
* variable list is not supported in fluent
* ~~cannot have two sub diagnostic with the same tag (eg. 2 .note or 2 .help)~~
allow multiple tag with SessionSubdiagnostic derive
Functions annotated with `#[rustc_lint_diagnostics]` are used by the
diagnostic migration lints to know when to lint, but functions that are
annotated with this attribute shouldn't themselves be linted.
Signed-off-by: David Wood <david.wood@huawei.com>
Use in-page links for sanitizer docs.
This updates the sanitizer documentation page so that the links in the summary at the top jump to the relevant sections within the page instead of leading away to a different site. I think this makes it a little easier to navigate this page which has gotten quite long.
This also fixes the broken link for MemTagSanitizer which was not defined. It also adds MemTagSanitizer to the external summary list at the bottom of the page.
translations(rustc_session): migrates `rustc_session` to use `SessionDiagnostic` - Pt. 1
## Description
This is the first PR for the migration of the module `rustc_session`. You can follow my progress [here](https://github.com/rust-lang/rust/issues/100717#issuecomment-1220279883).
The PR migrates the files `cgu_reuse_tracker` and `parse.rs` to use `SessionDiagnostic `.
Migrate rustc_monomorphize to use SessionDiagnostic
### Description
- Migrates diagnostics in `rustc_monomorphize` to use `SessionDiagnostic`
- Adds an `impl IntoDiagnosticArg for PathBuf`
### TODO / Help!
- [x] I'm having trouble figuring out how to apply an optional note. 😕 Help!?
- Resolved. It was bad docs. Fixed in https://github.com/rust-lang/rustc-dev-guide/pull/1437/files
- [x] `errors:RecursionLimit` should be `#[fatal ...]`, but that doesn't exist so it's `#[error ...]` at the moment.
- Maybe I can switch after this is merged in? --> https://github.com/rust-lang/rust/pull/100694
- Or maybe I need to manually implement `SessionDiagnostic` instead of deriving it?
- [x] How does one go about converting an error inside of [a call to struct_span_lint_hir](8064a49508/compiler/rustc_monomorphize/src/collector.rs (L917-L927))?
- [x] ~What placeholder do you use in the fluent template to refer to the value in a vector? It seems like [this code](0b79f758c9/compiler/rustc_macros/src/diagnostics/diagnostic_builder.rs (L83-L114)) ought to have the answer (or something near it)...but I can't figure it out.~ You can't. Punted.
This PR will fix some typos detected by [typos].
I only picked the ones I was sure were spelling errors to fix, mostly in
the comments.
[typos]: https://github.com/crate-ci/typos
Before, the text simply asked people to use a symbol which is hard to
search for. Now the text links back to the chapter on error
propagation in The Book. That should help people find the relevant
keywords for further searches.
Fix the emission order of `trait_duplication_in_bounds`
Makes the lint emit in source order rather than whatever order the hash map happens to be in. This is currently blocking the sync into rustc.
changelog: None
Rollup of 8 pull requests
Successful merges:
- #100970 (Allow deriving multipart suggestions)
- #100984 (Reinstate preloading of some dll imports)
- #101011 (Use getentropy when possible on all Apple platforms)
- #101025 (Add tier-3 support for powerpc64 and riscv64 openbsd)
- #101049 (Remove span fatal from ast lowering)
- #101100 (Make call suggestions more general and more accurate)
- #101171 (Fix UB from misalignment and provenance widening in `std::sys::windows`)
- #101185 (Tweak `WellFormedLoc`s a bit)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Fix UB from misalignment and provenance widening in `std::sys::windows`
This fixes two types of UB:
1. Reading past the end of a reference in types like `&c::REPARSE_DATA_BUFFER` (see https://github.com/rust-lang/unsafe-code-guidelines/issues/256). This is fixed by using `addr_of!`. I think there are probably a couple more cases where we do this for other structures, and will look into it in a bit.
2. Failing to ensure that a `[u8; N]` on the stack is sufficiently aligned to convert to a `REPARSE_DATA_BUFFER`. ~~This was done by introducing a new `AlignedAs` struct that allows aligning one type to the alignment of another type. I expect there are other places where we have this issue too, or I wouldn't introduce this type, but will get to them after this lands.~~
~~Worth noting, it *is* implemented in a way that can cause problems depending on how we fix#81996, but this would be caught by the test I added (and presumably if we decide to fix that in a way that would break this code, we'd also introduce a `#[repr(simple)]` or `#[repr(linear)]` as a replacement for this usage of `#[repr(C)]`).~~
Edit: None of that is still in the code, I just went with a `Align8` since that's all we'll need for almost everything we want to call.
These are more or less "potential UB" since it's likely at the moment everything works fine, although the alignment not causing issues might just be down to luck (and x86 being forgiving).
~~NB: I've only ensured this check builds, but will run tests soon.~~ All tests pass, including stage2 compiler tests.
r? ``@ChrisDenton``
