Simplify output capturing
This is a sequence of incremental improvements to the unstable/internal `set_panic` and `set_print` mechanism used by the `test` crate:
1. Remove the `LocalOutput` trait and use `Arc<Mutex<dyn Write>>` instead of `Box<dyn LocalOutput>`. In practice, all implementations of `LocalOutput` were just `Arc<Mutex<..>>`. This simplifies some logic and removes all custom `Sink` implementations such as `library/test/src/helpers/sink.rs`. Also removes a layer of indirection, as the outermost `Box` is now gone. It also means that locking now happens per `write_fmt`, not per individual `write` within. (So `"{} {}\n"` now results in one `lock()`, not four or more.)
2. Since in all cases the `dyn Write`s were just `Vec<u8>`s, replace the type with `Arc<Mutex<Vec<u8>>>`. This simplifies things more, as error handling and flushing can be removed now. This also removes the hack needed in the default panic handler to make this work with `::realstd`, as (unlike `Write`) `Vec<u8>` is from `alloc`, not `std`.
3. Replace the `RefCell`s by regular `Cell`s. The `RefCell`s were mostly used as `mem::replace(&mut *cell.borrow_mut(), something)`, which is just `Cell::replace`. This removes an unecessary bookkeeping and makes the code a bit easier to read.
4. Merge `set_panic` and `set_print` into a single `set_output_capture`. Neither the test crate nor rustc (the only users of this feature) have a use for using these separately. Merging them simplifies things even more. This uses a new function name and feature name, to make it clearer this is internal and not supposed to be used by other crates.
Might be easier to review per commit.
Demote i686-unknown-freebsd to tier 2 compiler target
While technically the `i686-unknown-freebsd` target has been a tier 2 development platform for a long time, with full toolchain tarballs available on static.rust-lang.org, due to a bug in the manifest generation the target was never available for download through rustup.
The infrastructure team privately inquired the FreeBSD package maintainers, and they weren't relying on those tarballs either, so it's a fair assumption to say practically nobody is using those tarballs.
This PR then removes the CI builder that produces full tarballs for the target, and moves the compilation of `rust-std` for the target in `dist-various-2`. The `x86_64-unknown-freebsd` target is *not* affected.
cc `@rust-lang/infra` `@rust-lang/compiler` `@rust-lang/release`
r? `@Mark-Simulacrum`
Promote aarch64-unknown-linux-gnu to Tier 1
This PR promotes the `aarch64-unknown-linux-gnu` target to Tier 1, as proposed by [RFC 2959]:
* The `aarch64-gnu` CI job is moved from `auto-fallible` to `auto`.
* The platform support documentation is updated, uplifting the target to Tiert 1 with a note about missing stack probes support.
* Building the documentation is enabled for the target, as we produce the `rust-docs` component for all Tier 1 platforms.
[RFC 2959]: https://github.com/rust-lang/rfcs/pull/2959
Add link to rust website
Fixes#30838
This doesn't fix the issue as suggested but it at least adds a link to allow to go back to the rust website.
r? `@steveklabnik`
While technically the i686-unknown-freebsd target has been a tier 2
development platform for a long time, with full toolchain tarballs
available on static.rust-lang.org, due to a bug in the manifest
generation the target was never available for download through rustup.
The infrastructure team privately inquired the FreeBSD package
maintainers, and they weren't relying on those tarballs either, so it's
a fair assumption to say practically nobody is using those tarballs.
This PR then removes the CI builder that produces full tarballs for the
target, and moves the compilation of rust-std for the target in
dist-various-2.
The x86_64-unknown-freebsd target is *not* affected.
Add support for SHA256 source file hashing
Adds support for `-Z src-hash-algorithm sha256`, which became available in LLVM 11.
Using an older version of LLVM will cause an error `invalid checksum kind` if the hash algorithm is set to sha256.
r? `@eddyb`
cc #70401 `@est31`
add mipsel-unknown-none target
This adds a target for bare MIPS32r2, little endian, softfloat. This target can be used for PIC32 microcontrollers (or possibly for other devices that have a MIPS MCU core such as the M4K core).
Tried to find a name for the target that is in line with the naming scheme apparently used for the other MIPS targets.
r? `@jonas-schievink`
Document -Zinstrument-coverage
r? ``@tmandry``
FYI ``@wesleywiser``
Here is my proposed document for LLVM source-based code coverage.
I based it on the `profile.md` page, in the same directory, and on the Clang guide for LLVM source-based coverage.
Update books
## nomicon
7 commits in 6e57e64501f61873ab80cb78a07180a22751a5d6..69333eddb1de92fd17e272ce4677cc983d3bd71d
2020-09-14 11:40:23 -0400 to 2020-10-17 15:44:12 -0700
- Tweak GHA config (rust-lang-nursery/nomicon#240)
- Fix link for `[T]` (rust-lang-nursery/nomicon#239)
- Update casts.md (rust-lang-nursery/nomicon#232)
- [WIP] Add more links (rust-lang-nursery/nomicon#180)
- Data Race definition should be more precise (rust-lang-nursery/nomicon#219)
- Update the diagnostic of `error[E0597]` in dropck.md (rust-lang-nursery/nomicon#157)
- fix typo in Lifetimes mutable reference aliasing section (rust-lang-nursery/nomicon#225)
## reference
3 commits in 1b78182e71709169dc0f1c3acdc4541b6860e1c4..10c16caebe475d0d11bec0531b95d7697856c13c
2020-10-11 13:53:47 -0700 to 2020-10-25 20:51:26 -0700
- Add `unsafe` for `mod` and `extern`. (rust-lang-nursery/reference#898)
- mention how unions interact with dropping (rust-lang-nursery/reference#897)
- Add `move_ref_pattern` docs (rust-lang-nursery/reference#881)
## book
2 commits in 451a1e30f2dd137aa04e142414eafb8d05f87f84..13e1c05420bca86ecc79e4ba5b6d02de9bd53c62
2020-10-05 09:11:18 -0500 to 2020-10-20 14:57:32 -0500
- Referencing to Appendix B (rust-lang/book#2481)
- Use GITHUB_PATH instead of add-path (rust-lang/book#2477)
## rust-by-example
2 commits in 152475937a8d8a1f508d8eeb57db79139bc803d9..99eafee0cb14e6ec641bf02a69d7b30f6058349a
2020-10-09 09:29:50 -0300 to 2020-10-21 14:21:55 -0300
- Formatting footer items. (rust-lang/rust-by-example#1385)
- Add partial moves example for `move_ref_pattern` stabilization (rust-lang/rust-by-example#1377)
## edition-guide
3 commits in 81f16863014de60b53de401d71ff904d163ee030..7bc9b7a5e800f79df62947cb7d566fd2fbaf19fe
2020-08-27 13:56:31 -0700 to 2020-10-23 18:31:23 -0500
- A few small updates. (rust-lang/edition-guide#221)
- Clarify the limitation of ? in main and tests (rust-lang/edition-guide#219)
- Update deprecated GitHub Actions commands. (rust-lang/edition-guide#220)
Link to cargo's `build-std` feature instead of `xargo` in custom target docs
The `xargo` tool is in maintenance mode since 2018 and the `build-std` feature of cargo already works reasonably well for most use cases.
* compiler docs
* Don't format list as part of a code block
* Clean up some other formatting
* rustdoc book
* Update CommonMark spec version to latest (0.28 -> 0.29)
* Clean up some various wording and formatting
Move `slice::check_range` to `RangeBounds`
Since this method doesn't take a slice anymore (#76662), it makes more sense to define it on `RangeBounds`.
Questions:
- Should the new method be `assert_len` or `assert_length`?
Update books
## reference
5 commits in 56a13c082ee90736c08d6abdcd90462517b703d3..1b78182e71709169dc0f1c3acdc4541b6860e1c4
2020-09-14 23:20:16 -0700 to 2020-10-11 13:53:47 -0700
- Specify that SSE4.1 includes SSSE3 instead of SSE3 (rust-lang-nursery/reference#892)
- Fix mutable expressions that can be dereferenced (rust-lang-nursery/reference#890)
- Fix grammar in memory model (rust-lang-nursery/reference#889)
- Add style checks. (rust-lang-nursery/reference#886)
- Add description for LUB Coercion (rust-lang-nursery/reference#808)
## book
1 commits in cb28dee95e5e50b793e6ba9291c5d1568d3ad72e..451a1e30f2dd137aa04e142414eafb8d05f87f84
2020-09-09 10:06:00 -0500 to 2020-10-05 09:11:18 -0500
- clarify description of when ? can be used (rust-lang/book#2471)
## rust-by-example
1 commits in 7d3ff1c12db08a847a57a054be4a7951ce532d2d..152475937a8d8a1f508d8eeb57db79139bc803d9
2020-09-28 15:54:25 -0300 to 2020-10-09 09:29:50 -0300
- Add 1.45.0 cast documentation (rust-lang/rust-by-example#1384)
## embedded-book
2 commits in dd310616308e01f6cf227f46347b744aa56b77d9..79ab7776929c66db83203397958fa7037d5d9a30
2020-09-26 08:54:08 +0000 to 2020-10-12 08:00:05 +0000
- llvm-objdump: Use two hyphens in flags to objdump (rust-embedded/book#270)
- Start/hardware: clarify which file needs tweaking (rust-embedded/book#266)
Promote aarch64-pc-windows-msvc to Tier 2 Development Platform
Adds a GitHub Actions CI build for `aarch64-pc-windows-msvc` via cross-compilation on an x86_64 host.
This promotes `aarch64-pc-windows-msvc` from a Tier 2 Compilation Target (std) to a Tier 2 Development Platform (std+rustc+cargo+tools).
Fixes#72881
r? `@pietroalbini`
Allow generic parameters in intra-doc links
Fixes#62834.
---
The contents of the generics will be mostly ignored (except for warning
if fully-qualified syntax is used, which is currently unsupported in
intra-doc links - see issue #74563).
* Allow links like `Vec<T>`, `Result<T, E>`, and `Option<Box<T>>`
* Allow links like `Vec::<T>::new()`
* Warn on
* Unbalanced angle brackets (e.g. `Vec<T` or `Vec<T>>`)
* Missing type to apply generics to (`<T>` or `<Box<T>>`)
* Use of fully-qualified syntax (`<Vec as IntoIterator>::into_iter`)
* Invalid path separator (`Vec:<T>:new`)
* Too many angle brackets (`Vec<<T>>`)
* Empty angle brackets (`Vec<>`)
Note that this implementation *does* allow some constructs that aren't
valid in the actual Rust syntax, for example `Box::<T>new()`. That may
not be supported in rustdoc in the future; it is an implementation
detail.
