use std for file mtime and atime modifications
Since 1.75 std provides an interface to set access and modified times on files. This change replaces the external dependency previously used for these operations with the corresponding std functions.
handle ci-rustc incompatible options during config parse
This PR ensures that `config.toml` does not use CI rustc incompatible options when CI rustc is enabled (just like [ci-llvm checks](e2cf31a614/src/bootstrap/src/core/config/config.rs (L1809-L1836))). Some options can change compiler's behavior in certain scenarios. If we don't check these incompatible options, CI runners using CI rustc might ignore options we have explicitly set. This could be dangerous as we might think a rustc test passed with option T but in fact it wasn't tested with option T.
Later in https://github.com/rust-lang/rust/pull/122709, I will disable CI rustc if any of those options were used (similar to [this approach](dd2c24aafd/src/ci/run.sh (L165-L169))). If CI runners fail because of these checks, it means the logic in run.sh isn't covering the incompatible options correctly (since any incompatible option should turn off CI rustc).
The list may not be complete, but should be a good first step as it's better than nothing!
Blocker for https://github.com/rust-lang/rust/pull/122709
use "bootstrap" instead of "rustbuild" in comments and docs
Let's stick with the single name "bootstrap" to refer to the bootstrap project to avoid confusion. This should make it clearer, especially for new contributors.
using correct tool mode for `run-make-support` crate
We don't need to ensure std (and rustc) for testing run-make-support's unit tests. Using stage 0 compiler is already enough and speeds up `x test run-make-support` invocations on a clean build.
Remove memory leaks in doctests in `core`, `alloc`, and `std`
cc `@RalfJung` https://github.com/rust-lang/rust/issues/126067https://github.com/rust-lang/miri/issues/3670
Should be no actual *documentation* changes[^1], all added/modified lines in the doctests are hidden with `#`,
This PR splits the existing memory leaks in doctests in `core`, `alloc`, and `std` into two general categories:
1. "Non-focused" memory leaks that are incidental to the thing being documented, and/or are easy to remove, i.e. they are only there because preventing the leak would make the doctest less clear and/or concise.
- These doctests simply have a comment like `# // Prevent leaks for Miri.` above the added line that removes the memory leak.
- [^2]Some of these would perhaps be better as part of the public documentation part of the doctest, to clarify that a memory leak can happen if it is not otherwise mentioned explicitly in the documentation (specifically the ones in `(A)Rc::increment_strong_count(_in)`).
2. "Focused" memory leaks that are intentional and documented, and/or are possibly fragile to remove.
- These doctests have a `# // FIXME` comment above the line that removes the memory leak, with a note that once `-Zmiri-disable-leak-check` can be applied at test granularity, these tests should be "un-unleakified" and have `-Zmiri-disable-leak-check` enabled.
- Some of these are possibly fragile (e.g. unleaking the result of `Vec::leak`) and thus should definitely not be made part of the documentation.
This should be all of the leaks currently in `core` and `alloc`. I only found one leak in `std`, and it was in the first category (excluding the modules `@RalfJung` mentioned in https://github.com/rust-lang/rust/issues/126067 , and reducing the number of iterations of [one test](https://github.com/rust-lang/rust/blob/master/library/std/src/sync/once_lock.rs#L49-L94) from 1000 to 10)
[^1]: assuming [^2] is not added
[^2]: backlink
Since 1.75 std provides an interface to set access and modified times on files.
This change replaces the external dependency previously used for these operations
with the corresponding std functions.
Signed-off-by: onur-ozkan <work@onurozkan.dev>
We don't need to ensure std (and rustc) for testing run-make-support's
unit tests. Using stage 0 compiler is already enough and speeds up
`x test run-make-support` invocations on a clean build.
Signed-off-by: onur-ozkan <work@onurozkan.dev>
Bootstrap command refactoring: improve debuggability (step 5)
Continuation of https://github.com/rust-lang/rust/pull/127321.
This PR improves the debuggability of command execution, by improving the output logged when a command fails (it now includes the exact location where the command was created and where it was executed), and also by adding a "drop bomb", which will panic if a command was created, but not executed (which is probably a bug).
Here is how the output of a failed command looks like:
```
Command "git" "foo" "[bar]" (failure_mode=Exit, stdout_mode=Capture, stderr_mode=Capture) did not execute successfully.
Expected success, got exit status: 1
Created at: src/core/build_steps/compile.rs:1699:9
Executed at: src/core/build_steps/compile.rs:1699:58
STDOUT ----
STDERR ----
git: 'foo' is not a git command. See 'git --help'.
```
And this is what is printed if you forget to execute a command:
```
thread 'main' panicked at /projects/personal/rust/rust/src/tools/build_helper/src/drop_bomb/mod.rs:42:13:
command constructed at `src/core/build_steps/compile.rs:1699:9` was dropped without being executed: `git`
```
Best reviewed commit by commit.
Tracking issue: https://github.com/rust-lang/rust/issues/126819
r? `@onur-ozkan`
Fix incorrect NDEBUG handling in LLVM bindings
We currently compile our LLVM bindings using `-DNDEBUG` if debuginfo for LLVM is disabled. However, `NDEBUG` doesn't have any relation to debuginfo, it controls whether assertions are enabled.
Split the LLVM_NDEBUG environment variable into two, so that assertions and debuginfo are controlled independently.
After this change, `LLVMRustDIBuilderInsertDeclareAtEnd` triggers an assertion failure on LLVM 19 due to an incorrect cast. Fix it by removing the unused return value entirely.
r? `@cuviper`
Rollup of 11 pull requests
Successful merges:
- #126502 (Ignore allocation bytes in some mir-opt tests)
- #126922 (add lint for inline asm labels that look like binary)
- #127209 (Added the `xop` target-feature and the `xop_target_feature` feature gate)
- #127310 (Fix import suggestion ice)
- #127338 (Migrate `extra-filename-with-temp-outputs` and `issue-85019-moved-src-dir` `run-make` tests to rmake)
- #127381 (Migrate `issue-83045`, `rustc-macro-dep-files` and `env-dep-info` `run-make` tests to rmake)
- #127535 (Fire unsafe_code lint on unsafe extern blocks)
- #127619 (Suggest using precise capturing for hidden type that captures region)
- #127631 (Remove `fully_normalize`)
- #127632 (Implement `precise_capturing` support for rustdoc)
- #127660 (Rename the internal `const_strlen` to just `strlen`)
r? `@ghost`
`@rustbot` modify labels: rollup
Implement `precise_capturing` support for rustdoc
Implements rustdoc (+json) support for local (i.e. non-cross-crate-inlined) RPITs with `use<...>` precise capturing syntax.
Tests kinda suck. They're really hard to write 😰
r? `@fmease` or re-roll if you're too busy!
also cc `@aDotInTheVoid` for the json side
Tracking:
* https://github.com/rust-lang/rust/issues/127228#issuecomment-2201443216 (not fully fixed for cross-crate-inlined opaques)
* https://github.com/rust-lang/rust/issues/123432
Migrate `extra-filename-with-temp-outputs` and `issue-85019-moved-src-dir` `run-make` tests to rmake
Part of #121876 and the associated [Google Summer of Code project](https://blog.rust-lang.org/2024/05/01/gsoc-2024-selected-projects.html).
Please try:
try-job: armhf-gnu
// try-job: test-various // already tried
try-job: x86_64-msvc
try-job: aarch64-apple
Ensure floats are returned losslessly by the Rust ABI on 32-bit x86
Solves #115567 for the (default) `"Rust"` ABI. When compiling for 32-bit x86, this PR changes the `"Rust"` ABI to return floats indirectly instead of in x87 registers (with the exception of single `f32`s, which this PR returns in general purpose registers as they are small enough to fit in one). No change is made to the `"C"` ABI as that ABI requires x87 register usage and therefore will need a different solution.
We currently compile our LLVM bindings using `-DNDEBUG` if
debuginfo for LLVM is disabled. However, `NDEBUG` doesn't have
any relation to debuginfo, it controls whether assertions are
enabled.
Rename the environment variable to `LLVM_ASSERTIONS` and drive
it using the `llvm_assertions` option. Also drop the explicit
`debug(false)` call, as cc already sets this up using the
cargo `DEBUG` environment variable.
The code for running tests uses a custom command machinery because it streams the output of the command. We thus need to mark the command as executed in a dry run, to avoid a drop bomb panic.
Update dist-riscv64-linux to binutils 2.40
binutils 2.40 is required by LLVM 19, as older versions do not know about the zmmul extension.
I've had to backport some patches to glibc and gcc as well, as they don't build with binutils 2.40. Alternatively, we could also switch to glibc 2.35 and gcc 10 (I think). I figured we'd want to avoid the glibc version change, but if that's fine for riscv I can go with that instead.
r? `````@cuviper`````
try-job: dist-riscv64-linux
Use rustc-stable-hash in the compiler
Following https://github.com/rust-lang/compiler-team/issues/755 and the release of the crate on crates.io, let's now use it in the compiler and remove the old implementation.
cc `@michaelwoerister`
r? ghost
compiletest: Better error message for bad `normalize-*` headers
Follow-up to #126777.
Example of the new error message in context:
```text
---- [ui] tests/ui/rfcs/rfc-2632-const-trait-impl/effects/minicore.rs stdout ----
thread '[ui] tests/ui/rfcs/rfc-2632-const-trait-impl/effects/minicore.rs' panicked at src/tools/compiletest/src/header.rs:1001:13:
couldn't parse custom normalization rule: `normalize-stderr-test ".*note: .*\n\n" -> ""`
help: expected syntax is: `normalize-stderr-test: "REGEX" -> "REPLACEMENT"`
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
```
binutils 2.40 is required by LLVM 19, as older versions do not
know about the zmmull extension.
I've had to backport some patches to glibc and gcc as well,
as they don't build with binutils 2.40. Alternatively, we could
also switch to glibc 2.35 and gcc 12 (I think). I figured we'd
want to avoid the glibc version change, but if that's fine for
riscv I can go with that instead.
Require a colon in `//@ normalize-*:` test headers
The previous parser for `//@ normalize-*` headers (before #126370) was so lax that it did not require `:` after the header name. As a result, the test suite contained a mix of with-colon and without-colon normalize headers, both numbering in the hundreds.
This PR updates the without-colon headers to add a colon (matching the style used by other headers), and then updates the parser to make the colon mandatory.
(Because the normalization parser only runs *after* the header system identifies a normalize header, this will detect and issue an error for relevant headers that lack the colon.)
Addresses one of the points of #126372.
Implement simple, unstable lint to suggest turning closure-of-async-block into async-closure
We want to eventually suggest people to turn `|| async {}` to `async || {}`. This begins doing that. It's a pretty rudimentary lint, but I wanted to get something down so I wouldn't lose the code.
Tracking:
* #62290
