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This was done in #145740 and #145947. It is causing problems for people
using r-a on anything that uses the rustc-dev rustup package, e.g. Miri,
clippy.
This repository has lots of submodules and subtrees and various
different projects are carved out of pieces of it. It seems like
`[workspace.dependencies]` will just be more trouble than it's worth.
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Because duplicates can be found with traits. Worse, the inherent methods could be private, and we'll discover that only later. But even if they're not they're different methods, and its seems worthy to present them all to the user.
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To the extent possible.
Previously they were confused. Sometimes generic params were treated as `Param` and sometimes as `Placeholder`. A completely redundant (in the new solver) mapping of salsa::Id to ints to intern some info where we could just store it uninterned (not in Chalk though, for some weird reason).
Plus fix a cute bug in closure substitution that was caught by the assertions of Chalk but the next solver did not have such assertions. Do we need more assertions?
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Normally, changes to rustfmt go into the separate repo. But, in
this case, the bug is introduced in a local change and therefore
isn't present in the rustfmt repo.
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compiletest: Capture panic messages via a custom panic hook
Currently, output-capture of panic messages relies on special cooperation between `#![feature(internal_output_capture)]` and the default panic hook. That's a problem if we want to perform our own output capture, because the default panic hook won't know about our custom output-capture mechanism.
We can work around that by installing a custom panic hook that prints equivalent panic messages to a buffer instead.
The custom hook is always installed, but delegates to the default panic hook unless a panic-capture buffer has been installed on the current thread. A panic-capture buffer is only installed on compiletest test threads (by the executor), and only if output-capture is enabled.
---
Right now this PR doesn't provide any particular concrete benefits. But it will be essential as part of further efforts to replace compiletest's use of `#![feature(internal_output_capture)]` with our own output-capture mechanism.
r? jieyouxu
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fixup nix dev shell again
r? Noratrieb
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improve output for 'cargo miri test --help'
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Pull recent changes from https://github.com/rust-lang/rust via Josh.
Upstream ref: 828e45ad11ce4ab56dd64e93f1fb5dd8f0c0ae93
Filtered ref: 10ab51e1b1b8eadb430163bd78ef39c0721cfbf8
This merge was created using https://github.com/rust-lang/josh-sync.
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This updates the rust-version file to 828e45ad11ce4ab56dd64e93f1fb5dd8f0c0ae93.
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Enforce in bootstrap that test must have stage at least 1 (except for compiletest)
This PR cleans up a bunch of test steps and adds metadata to them. I didn't yet touch the most complicated step (`CompileTest`), I'm leaving that for another PR.
Testing anything on stage 0 is only possible for compiletest and with `build.allow-compiletest-stage0`. Testing anything else on stage 0 will either produce a nice error or crash with a stage being subtracted below zero.
r? `@jieyouxu`
try-job: dist-x86_64-linux
try-job: aarch64-gnu
try-job: arm-android
try-job: `x86_64-gnu-llvm-20*`
try-job: `x86_64-msvc-*`
try-job: aarch64-apple
try-job: test-various
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native-lib: allow passing structs as arguments
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Co-authored-by: Ralf Jung <post@ralfj.de>
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Rollup of 4 pull requests
Successful merges:
- rust-lang/rust#144443 (Make target pointer width in target json an integer)
- rust-lang/rust#145174 (Ensure consistent drop for panicking drop in hint::select_unpredictable)
- rust-lang/rust#145592 (Fix format string grammar in docs and improve alignment error message for rust-lang/rust#144023)
- rust-lang/rust#145931 (Clarify that align_offset overaligns)
r? `@ghost`
`@rustbot` modify labels: rollup
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Make target pointer width in target json an integer
r? Noratrieb
cc `@RalfJung` (https://github.com/rust-lang/rust/pull/142352/files#r2230380120)
try-job: x86_64-rust-for-linux
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Use absolute path to llvm-bolt, merge-fdata rather than PATH
This unconditionally uses the provided LLVM toolchain's BOLT. I'm not sure that makes sense, but since we don't build BOLT as part of Rust's build of LLVM today, it's probably the right option for now.
This avoids breaking the build on not being able to find the llvm-bolt executable.
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This unconditionally uses the provided LLVM toolchain's BOLT. I'm not
sure that makes sense, but since we don't build BOLT as part of Rust's
build of LLVM today, it's probably the right option for now.
This avoids breaking the build on not being able to find the llvm-bolt
executable.
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Hard-code `char::is_control`
Split off from https://github.com/rust-lang/rust/pull/145219
According to
https://www.unicode.org/policies/stability_policy.html#Property_Value, the set of codepoints in `Cc` will never change. So we can hard-code the patterns to match against instead of using a table.
This doesn't change the generated assembly, since the lookup table is small enough that[ LLVM is able to inline the whole search](https://godbolt.org/z/bG8dM37YG). But this does reduce the chance of regressions if LLVM's heuristics change in the future, and means less generated Rust code checked in to `unicode-data.rs`.
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fix: When mapping next-solver's `dyn` type, add `Self` (aka. bound var ^1.0) to auto traits' substitutions
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native-lib mode: avoid unsoundness due to mrpotect
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Add managarm as a tier 3 target
This PR aims to introduce the `x86_64-unknown-managarm-mlibc` as a tier 3 target to Rust.
[managarm](https://github.com/managarm/managarm) is a microkernel with fully asynchronous I/O that also provides a POSIX server. Despite the differences, managarm provides good compatability with POSIX and Linux APIs. As a rule of thumb, barring OS-specific code, it should be mostly source-compatible with Linux.
We have been shipping a patched rust for over 25 releases now, and we would like to upstream our work. For a smoother process, this PR only adds the target to rustc and some documentation. `std` support will be added in a future PR.
## Addressing the tier 3 target policy
> A tier 3 target must have a designated developer or developers (the "target maintainers") on record to be CCed when issues arise regarding the target. (The mechanism to track and CC such developers may evolve over time.)
`@no92,` `@64` and `@Dennisbonke` will be target maintainers.
> Targets must use naming consistent with any existing targets; for instance, a target for the same CPU or OS as an existing Rust target should use the same name for that CPU or OS. Targets should normally use the same names and naming conventions as used elsewhere in the broader ecosystem beyond Rust (such as in other toolchains), unless they have a very good reason to diverge. Changing the name of a target can be highly disruptive, especially once the target reaches a higher tier, so getting the name right is important even for a tier 3 target.
> - Target names should not introduce undue confusion or ambiguity unless absolutely necessary to maintain ecosystem compatibility. For example, if the name of the target makes people extremely likely to form incorrect beliefs about what it targets, the name should be changed or augmented to disambiguate it.
> - If possible, use only letters, numbers, dashes and underscores for the name. Periods (.) are known to cause issues in Cargo.
`x86_64-unknown-managarm-mlibc` is what we use for LLVM as well.
> Tier 3 targets may have unusual requirements to build or use, but must not create legal issues or impose onerous legal terms for the Rust project or for Rust developers or users.
> - The target must not introduce license incompatibilities.
> - Anything added to the Rust repository must be under the standard Rust license (MIT OR Apache-2.0).
> - The target must not cause the Rust tools or libraries built for any other host (even when supporting cross-compilation to the target) to depend on any new dependency less permissive than the Rust licensing policy. This applies whether the dependency is a Rust crate that would require adding new license exceptions (as specified by the tidy tool in the rust-lang/rust repository), or whether the dependency is a native library or binary. In other words, the introduction of the target must not cause a user installing or running a version of Rust or the Rust tools to be subject to any new license requirements.
> - Compiling, linking, and emitting functional binaries, libraries, or other code for the target (whether hosted on the target itself or cross-compiling from another target) must not depend on proprietary (non-FOSS) libraries. Host tools built for the target itself may depend on the ordinary runtime libraries supplied by the platform and commonly used by other applications built for the target, but those libraries must not be required for code generation for the target; cross-compilation to the target must not require such libraries at all. For instance, rustc built for the target may depend on a common proprietary C runtime library or console output library, but must not depend on a proprietary code generation library or code optimization library. Rust's license permits such combinations, but the Rust project has no interest in maintaining such combinations within the scope of Rust itself, even at tier 3.
> - "onerous" here is an intentionally subjective term. At a minimum, "onerous" legal/licensing terms include but are not limited to: non-disclosure requirements, non-compete requirements, contributor license agreements (CLAs) or equivalent, "non-commercial"/"research-only"/etc terms, requirements conditional on the employer or employment of any particular Rust developers, revocable terms, any requirements that create liability for the Rust project or its developers or users, or any requirements that adversely affect the livelihood or prospects of the Rust project or its developers or users.
[managarm](https://github.com/managarm/managarm) is licensed as MIT. No dependencies were added.
> Neither this policy nor any decisions made regarding targets shall create any binding agreement or estoppel by any party. If any member of an approving Rust team serves as one of the maintainers of a target, or has any legal or employment requirement (explicit or implicit) that might affect their decisions regarding a target, they must recuse themselves from any approval decisions regarding the target's tier status, though they may otherwise participate in discussions.
> - This requirement does not prevent part or all of this policy from being cited in an explicit contract or work agreement (e.g. to implement or maintain support for a target). This requirement exists to ensure that a developer or team responsible for reviewing and approving a target does not face any legal threats or obligations that would prevent them from freely exercising their judgment in such approval, even if such judgment involves subjective matters or goes beyond the letter of these requirements.
Understood. None of the listed maintainers are on a Rust team.
> Tier 3 targets should attempt to implement as much of the standard libraries as possible and appropriate (core for most targets, alloc for targets that can support dynamic memory allocation, std for targets with an operating system or equivalent layer of system-provided functionality), but may leave some code unimplemented (either unavailable or stubbed out as appropriate), whether because the target makes it impossible to implement or challenging to implement. The authors of pull requests are not obligated to avoid calling any portions of the standard library on the basis of a tier 3 target not implementing those portions.
Support for `std` will be provided in a future PR. Only minor changes are required, however they depend on support in the `libc` crate which will be PRed in soon.
> The target must provide documentation for the Rust community explaining how to build for the target, using cross-compilation if possible. If the target supports running binaries, or running tests (even if they do not pass), the documentation must explain how to run such binaries or tests for the target, using emulation if possible or dedicated hardware if necessary.
The steps needed to take are described in the documentation provided with this PR.
> Tier 3 targets must not impose burden on the authors of pull requests, or other developers in the community, to maintain the target. In particular, do not post comments (automated or manual) on a PR that derail or suggest a block on the PR based on a tier 3 target. Do not send automated messages or notifications (via any medium, including via `@)` to a PR author or others involved with a PR regarding a tier 3 target, unless they have opted into such messages.
> - Backlinks such as those generated by the issue/PR tracker when linking to an issue or PR are not considered a violation of this policy, within reason. However, such messages (even on a separate repository) must not generate notifications to anyone involved with a PR who has not requested such notifications.
Understood.
> Patches adding or updating tier 3 targets must not break any existing tier 2 or tier 1 target, and must not knowingly break another tier 3 target without approval of either the compiler team or the maintainers of the other tier 3 target.
> - In particular, this may come up when working on closely related targets, such as variations of the same architecture with different features. Avoid introducing unconditional uses of features that another variation of the target may not have; use conditional compilation or runtime detection, as appropriate, to let each target run code supported by that target.
We have no indication that anything breaks due to this PR.
> Tier 3 targets must be able to produce assembly using at least one of rustc's supported backends from any host target.
No problems here, as we target `x86_64`.
r? compiler-team
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Pull recent changes from https://github.com/rust-lang/rust via Josh.
Upstream ref: e004014d1bf4c29928a0f0f9f7d0964d43606cbd
Filtered ref: d62798e442c1c6ec461725b87dacc87c285259c8
This merge was created using https://github.com/rust-lang/josh-sync.
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This updates the rust-version file to e004014d1bf4c29928a0f0f9f7d0964d43606cbd.
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str: Stabilize `round_char_boundary` feature
Closes https://github.com/rust-lang/rust/issues/93743
FCP completed https://github.com/rust-lang/rust/issues/93743#issuecomment-3168382171
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r=scottmcm
Stabilize `strict_provenance_atomic_ptr` feature
This closes [tracking issue](https://github.com/rust-lang/rust/issues/99108) and stabilises `AtomicPtr::{fetch_ptr_add, fetch_ptr_sub, fetch_byte_add, fetch_byte_sub, fetch_or, fetch_and, fetch_xor}`
---
EDIT: FCP completed at https://github.com/rust-lang/rust/issues/99108#issuecomment-3168260347
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Bumps [tracing-subscriber](https://github.com/tokio-rs/tracing) from 0.3.19 to 0.3.20.
- [Release notes](https://github.com/tokio-rs/tracing/releases)
- [Commits](https://github.com/tokio-rs/tracing/compare/tracing-subscriber-0.3.19...tracing-subscriber-0.3.20)
---
updated-dependencies:
- dependency-name: tracing-subscriber
dependency-version: 0.3.20
dependency-type: indirect
...
Signed-off-by: dependabot[bot] <support@github.com>
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Bumps [tracing-subscriber](https://github.com/tokio-rs/tracing) from 0.3.19 to 0.3.20.
- [Release notes](https://github.com/tokio-rs/tracing/releases)
- [Commits](https://github.com/tokio-rs/tracing/compare/tracing-subscriber-0.3.19...tracing-subscriber-0.3.20)
---
updated-dependencies:
- dependency-name: tracing-subscriber
dependency-version: 0.3.20
dependency-type: direct:production
...
Signed-off-by: dependabot[bot] <support@github.com>
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Add shim test for `DuplicateHandle`
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unsupported.
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unix read/write: fix zero-size handling
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compiletest: Reduce the number of `println!` calls that don't have access to `TestCx`
In order to stop using `#![feature(internal_output_capture)]` in compiletest, we need to be able to capture the console output of individual tests run by the executor.
The approach I have planned is to have all test runners print “console” output into a trait object that is passed around as part of `TestCx`, since almost all test-runner code has easy access to that context. So `println!("foo")` will become `writeln!(self.stdout, "foo")`, and so on.
In order to make that viable, we need to avoid unnecessary printing in places that don't have easy access to `TestCx`. To do so, we can either get rid of unnecessary print statements, or rearrange the code to make the context available. This PR uses both approaches.
r? jieyouxu
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fix: Add progress bars to more places in analysis-stats
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This appears to have been leftover debugging code.
If the capture information turns out to have still been useful, we can find a
way to emit it in a way that doesn't interfere with overhauling compiletests's
output capture system.
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The code in this module is always called in the context of running an
individual tests, and sometimes prints output that needs to be captured.
Moving this module into `runtest` will make it easier to find and audit all of
the print statements that need to be updated when overhauling output-capture.
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When working on a new output-capture system, this will make it easier to obtain
a capturing stream from the test context.
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Running `./x --verbose` will still print out the command-line arguments, and
setting `RUST_LOG=compiletest` will now log the full config instead of a
subset.
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