Rollup merge of #74872 - JohnTitor:ping-risc-v, r=Mark-Simulacrum
Enable to ping RISC-V group via triagebot
We have the RISC-V group (https://github.com/rust-lang/team/blob/master/teams/risc-v.toml) but don't enable to ping on this repository (https://github.com/rust-lang/rust/pull/74813#issuecomment-664841177).
We don't have the instructions on the rustc-dev-guide yet but I'll create it soonish.
Auto merge of #74791 - tmiasko:raw-waker-inline, r=LukasKalbertodt
Add #[inline] to RawWaker::new
`RawWaker::new` is used when creating a new waker or cloning an existing one,
for example as in code below. The `RawWakerVTable::new` can be const evaluated,
but `RawWaker::new` itself cannot since waker pointer is not known at compile
time. Add `#[inline]` to avoid overhead of a function call.
Auto merge of #74482 - alexcrichton:update-stdarch, r=hanna-kruppe
Update stdarch submodule
This commit updates the src/stdarch submodule primarily to include
rust-lang/stdarch#874 which updated and revamped WebAssembly SIMD
intrinsics and renamed WebAssembly atomics intrinsics. This is all
unstable surface area of the standard library so the changes should be
ok here. The SIMD updates also enable SIMD intrinsics to be used by any
program any any time, yay!
cc #74372, a tracking issue I've opened for the stabilization of SIMD
intrinsics
Alex Crichton [Sat, 18 Jul 2020 15:43:09 +0000 (08:43 -0700)]
Update stdarch submodule
This commit updates the src/stdarch submodule primarily to include
rust-lang/stdarch#874 which updated and revamped WebAssembly SIMD
intrinsics and renamed WebAssembly atomics intrinsics. This is all
unstable surface area of the standard library so the changes should be
ok here. The SIMD updates also enable SIMD intrinsics to be used by any
program any any time, yay!
cc #74372, a tracking issue I've opened for the stabilization of SIMD
intrinsics
Auto merge of #73964 - jyn514:sane-defaults, r=Mark-Simulacrum
Improve defaults in x.py
- Make the default stage dependent on the subcommand
- Don't build stage1 rustc artifacts with x.py build --stage 1. If this is what you want, use x.py build --stage 2 instead, which gives you a working libstd.
- Change default debuginfo when debug = true from 2 to 1
I tried to fix CI to use `--stage 2` everywhere it currently has no stage, but I might have missed a spot.
This does not update much of the documentation - most of it is in https://github.com/rust-lang/rustc-dev-guide/ or https://github.com/rust-lang/rust-forge and will need a separate PR.
See individual commits for a detailed rationale of each change.
See also the MCP: https://github.com/rust-lang/compiler-team/issues/326
r? @Mark-Simulacrum , but anyone is free to give an opinion.
Auto merge of #74796 - infinity0:master, r=nikomatsakis
config.toml.example: Update remap-debuginfo doc to be more general & accurate
This makes it more obvious that the work-around to #74786 is actually correct, and a custom `--remap-path-prefix` isn't needed.
In fact the previous comment `/rustc/$hash/$crate` was wrong, it is not `$crate` but whatever path exists in the rustc source tree, so either `src/$crate` or `vendor/$crate`. I've fixed that as well to avoid future confusion.
Auto merge of #74855 - jyn514:separate-lints, r=Manishearth
Separate `missing_doc_code_examples` from intra-doc links
These two lints have no relation other than both being nightly-only.
This allows stabilizing intra-doc links without stabilizing `missing_doc_code_examples`.
Fixes one of the issues spotted by @ollie27 in https://github.com/rust-lang/rust/pull/74430#issuecomment-664693080.
Joshua Nelson [Mon, 27 Jul 2020 19:53:01 +0000 (15:53 -0400)]
Add assert that tests happen with stage 2 in CI
- Use stage 2 for makefile
- Move assert to builder
- Don't add an assert for --help
- Allow --stage 0 if passed explicitly
- Don't assert defaults during tests
> Linking seems to consume all available RAM, leading to the OS to swap memory to disk and slowing down everything in the process
Compiling itself doesn't seem to take up as much RAM, and I'm only looking to check whether a minimal testcase can be compiled by rustc, where the runtime performance isn't much of an issue
> do you have debug = true or debuginfo-level = 2 in config.toml?
> if so I think that results in over 2GB of debuginfo nowadays and is likely the culprit
> which might mean we're giving out bad advice :(
Anecdotally, this sped up my stage 1 build from 15 to 10 minutes.
This still adds line numbers, it only removes variable and type information.
This leaves you with a broken stage2 rustc which doesn't even have
libcore and is effectively useless. Additionally, it compiles rustc
twice, which is not normally what you want.
This is suitable for contributors working on the compiler. It ensures
that you have a working rustc and libstd without having to pass
`src/libstd` in addition.
This is suitable for CI, which wants all tools in release mode.
However, most of the use cases for this should use `x.py dist` instead,
which builds all the tools without each having to be named individually.
Joshua Nelson [Thu, 2 Jul 2020 12:08:09 +0000 (08:08 -0400)]
Make the default stage dependent on the subcommand
### x.py build/test: stage 1
I've seen very few people who actually use full stage 2 builds on purpose. These compile rustc and libstd twice and don't give you much more information than a stage 1 build (except in rare cases like https://github.com/rust-lang/rust/pull/68692#discussion_r376392145). For new contributors, this makes the build process even more daunting than it already is. As long as CI is changed to use `--stage 2` I see no downside here.
### x.py bench/dist/install: stage 2
These commands have to do with a finished, optimized version of rustc. It seems very rare to want to use these with a stage 1 build.
### x.py doc: stage 0
Normally when you document things you're just fixing a typo. In this case there is no need to build the whole rust compiler, since the documentation will usually be the same when generated with the beta compiler or with stage 1.
Note that for this release cycle only there will be a significant different between stage0 and stage1 docs: https://github.com/rust-lang/rust/pull/73101. However most of the time this will not be the case.
Joshua Nelson [Tue, 28 Jul 2020 02:16:41 +0000 (22:16 -0400)]
Separate `missing_doc_code_examples` from intra-doc links
These two lints have no relation other than both being nightly-only.
This allows stabilizing intra-doc links without stabilizing
missing_doc_code_examples.
Auto merge of #73265 - mark-i-m:mv-std, r=Mark-Simulacrum,mark-i-m
mv std libs to library/
This is the first step in refactoring the directory layout of this repository, with further followup steps planned (but not done yet).
Background: currently, all crates are under src/, without nested src directories and with the unconventional `lib*` prefixes (e.g., `src/libcore/lib.rs`). This directory structures is not idiomatic and makes the `src/` directory rather overwhelming. To improve contributor experience and make things a bit more approachable, we are reorganizing the repo a bit.
In this PR, we move the standard libs (basically anything that is "runtime", as opposed to part of the compiler, build system, or one of the tools, etc). The new layout moves these libraries to a new `library/` directory in the root of the repo. Additionally, we remove the `lib*` prefixes and add nested `src/` directories. The other crates/tools in this repo are not touched. So in summary:
```
library/<crate>/src/*.rs
src/<all the rest> // unchanged
```
where `<crate>` is:
- core
- alloc
- std
- test
- proc_macro
- panic_abort
- panic_unwind
- profiler_builtins
- term
- unwind
- rtstartup
- backtrace
- rustc-std-workspace-*
There was a lot of discussion about this and a few rounds of compiler team approvals, FCPs, MCPs, and nominations. The original MCP is https://github.com/rust-lang/compiler-team/issues/298. The final approval of the compiler team was given here: https://github.com/rust-lang/rust/pull/73265#issuecomment-659498446.
The name `library` was chosen to complement a later move of the compiler crates to a `compiler/` directory. There was a lot of discussion around adding the nested `src/` directories. Note that this does increase the nesting depth (plausibly important for manual traversal of the tree, e.g., through GitHub's UI or `cd`), but this is deemed to be better as it fits the standard layout of Rust crates throughout most of the ecosystem, though there is some debate about how much this should apply to multi-crate projects. Overall, there seem to be more people in favor of nested `src/` than against.
After this PR, there are no dependencies out of the `library/` directory except on the `build_helper` (or crates.io crates).
Now that `#[track_caller]` is on track to stabilize, one of the roughest edges of working with it is the fact that you can't do much with `Location` except turn it back into a `(&str, u32, u32)`. Which makes sense because the type was defined around the panic machinery originally passing around that tuple (it has the same layout as Location even).
This PR derives common traits for the type in accordance with the [API guidelines](https://rust-lang.github.io/api-guidelines/interoperability.html#types-eagerly-implement-common-traits-c-common-traits) (those apply to core, right?).
There's a risk here, e.g. if we ever change the representation of `Location` in a way that makes it harder to implement `Ord`, we might not be able to make that change in a backwards-compatible way. I don't think there's any other compatibility hazard here, as the only changes we currently imagine for the type are to add end fields.
Auto merge of #74831 - Manishearth:rollup-ugw4pt4, r=Manishearth
Rollup of 4 pull requests
Successful merges:
- #73858 (Make more primitive integer methods const)
- #74487 (Forbid generic parameters in anon consts inside of type defaults)
- #74803 (rustbuild: fix bad usage of UNIX exec() in rustc wrapper)
- #74822 (More ensure stack to avoid segfault with increased `recursion_limit`)
Rollup merge of #74803 - infinity0:fix-exec, r=nagisa
rustbuild: fix bad usage of UNIX exec() in rustc wrapper
exec never returns, it replaces the current process. so anything after it is unreachable. that's not how exec_cmd() is used in the surrounding code
We use `--on-fail env` on Debian. `env` always returns exit code 0. This means that the `rustc` bootstrap wrapper always returns exit code 0 even when it fails. However, the crossbeam-utils build process (due to autocfg) relies on `rustc` returning error exit codes when detecting CPU features, and ends up writing `cargo:rustc-cfg=has_atomic_u128` even when it's not detected, because the `rustc` wrapper is always giving exit code 0.
(This separately is causing our builds to try to compile rustc 40+ times, due to #74801.)
Rollup merge of #74487 - lcnr:const-in-ty-default, r=varkor
Forbid generic parameters in anon consts inside of type defaults
Emit a resolution error for `struct Foo<T, U = [u8; std::mem::size_of::<T>()]>`.
We are unable to support this with the way `ty::Generics` is currently used,
so let's just forbid it entirely for now.
Fixes some ICE on stable, e.g.
```rust
struct Foo<T, U = [u8; std::mem::size_of::<*mut T>()]>(T, U);
```
Rollup merge of #73858 - tspiteri:const-methods, r=oli-obk
Make more primitive integer methods const
Now that #72437 has been merged and `const_if_match` is stable, these methods can be stabilized const. The methods are grouped in commits according to feature names:
Auto merge of #74775 - RalfJung:miri-alloc-ids, r=oli-obk
Miri: replace canonical_alloc_id mechanism by extern_static_alloc_id
We only have to call `extern_static_alloc_id` when a `Pointer` is "imported" from the `tcx` to the machine, not on each access. Also drop the old hook for TLS handling, it is not needed any more.
The Miri side of this is at https://github.com/rust-lang/miri/pull/1489.
Auto merge of #74817 - JohnTitor:rollup-0fchdye, r=JohnTitor
Rollup of 6 pull requests
Successful merges:
- #74088 (Avoid writes without any data in `Write::write_all_vectored`)
- #74598 (Fix sync_once_cell_does_not_leak_partially_constructed_boxes)
- #74750 (Clean up some uses of logging in ui tests)
- #74783 (python codes cleanup)
- #74790 (Don't italicize comments in ayu theme)
- #74799 (Fixed typo in `closure`)
Rollup merge of #74750 - oli-obk:logging_and_test_cleanups, r=JohnTitor
Clean up some uses of logging in ui tests
The removed test can't possibly trigger anything today as we don't have logging in libstd.
The `exec-env` flag was mistakenly used for adding env vars to rustc invocations both in test and in the test suite and there were some accidental renames from RUST_LOG to RUSTC_LOG that I reverted.
Rollup merge of #74088 - tmiasko:write-all-vectored-empty, r=KodrAus
Avoid writes without any data in `Write::write_all_vectored`
Previously, when non-empty sequence of empty IoSlices have been provided
to `Write::write_all_vectored`, the buffers would be written as is with
`Write::write_vectored` and subsequently the return value `Ok(0)` would
be misinterpreted as an error.
Avoid writes without any data by advancing the buffers first. This
matches the documented behaviour of `Write::write_all_vectored`
and is analogous to what happens in `Write::write_all`.
Auto merge of #74737 - smmalis37:astconv-factor, r=davidtwco
Pull out some duplicated code into a new function
I debated pulling the actual struct_span_err calls into the new method, but I felt like having to pass in multiple arguments for it and wiring up string formatting outweighed the benefits.
Viewing the diff with whitespace ignored is recommended.
projects / rust.git / log