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The `cargo asm` tool pattern matches on such labels to figure out where functions end: normal functions generated by LLVM always do have such a label. We don't guarantee that naked functions emit such a label, but having `cargo asm` work is convenient
Although these types aren't directly constructable externally, since they're pub, I think this omission was an oversight.
Improve doc of some methods that take ranges Some methods that were taking some range in parameter were a bit inconsistent / unclear in the panic documentation. Here is the recap: - Replaced "start/end point" by "start/end bound" to be coherent with [`RangeBounds`](https://doc.rust-lang.org/stable/std/ops/trait.RangeBounds.html) naming (it's also easier to understand I think) - Previously, it was written "_[...] or if the end point is greater than the length of [...]_", but this is not entirely true! Actually, you can have a start bound that is greater than the length, with an end bound that is unbounded and it will also panic. Therefore I think that "_[...] one of the range bound is bounded and greater than the length of [...]_" is better! - `String` methods weren't mentionning that the method panics if `start_bound > end_bound` but it actually does! It uses `slice::range` which panics when `start > end`. (https://doc.rust-lang.org/stable/src/alloc/string.rs.html#1932-1934, https://doc.rust-lang.org/stable/src/core/slice/index.rs.html#835-837). You can also test it with: ```rs struct MyRange; impl std::ops::RangeBounds<usize> for MyRange { fn start_bound(&self) -> std::ops::Bound<&usize> { std::ops::Bound::Included(&3usize) } fn end_bound(&self) -> std::ops::Bound<&usize> { std::ops::Bound::Included(&1usize) } } fn main() { let mut s = String::from("I love Rust!"); s.drain(MyRange); // panics! } ```
…r=Mark-Simulacrum Stabilize `new_zeroed_alloc` The corresponding `new_uninit` and `new_uninit_slice` functions were stabilized in rust-lang#129401, but the zeroed counterparts were left for later out of a [desire](rust-lang#63291 (comment)) to stabilize only the minimal set. These functions are straightforward mirrors of the uninit functions and well-established. Since no blockers or design questions have surfaced in the past year, I think it's time to stabilize them. Tracking issue: rust-lang#129396
…k-Simulacrum Stabilize `std::panic::Location::file_as_c_str` Closes: rust-lang#141727 Nominating this for T-lang as per ```@traviscross``` rust-lang#141727 (comment)
…r=workingjubilee fix issue with `cmse-nonsecure-entry` ABI being both async and c-variadic tracking issue: rust-lang#75835 fixes rust-lang#132142 An `extern "cmse-nonsecure-entry"` function cannot be c-variadic (or, in any case, clang/LLVM does not support it, see https://godbolt.org/z/MaPjzGcE1). So just stop looking at the type if we know it'll be invalid anyway. I'm not entirely sure how to test this. The ICE is only possible on the `thumbv8m.main-none-eabi` and some related targets. I think using `minicore` is the most convenient, but use of `async` requires quite a long list of lang items to be present. Maybe we want that anyway though? On the other hand, it's extra `minicore` surface that might go out of date. An alternative is `run-make`, that should work, but is much less convenient. See also [#t-compiler/help > &rust-lang#96;async fn&rust-lang#96; and &rust-lang#96;minicore&rust-lang#96;](https://rust-lang.zulipchat.com/#narrow/channel/182449-t-compiler.2Fhelp/topic/.60async.20fn.60.20and.20.60minicore.60/with/539427262). r? `@ghost`
…=cjgillot Deref related cleanups in ref_prop Cherry picked from rust-lang#146710 r? cjgillot
…manieu naked_asm: emit a label starting with `func_end` The `cargo asm` tool (`cargo install cargo-show-asm`) pattern matches on such labels to figure out where functions end: normal functions generated by LLVM always do have such a label. We don't guarantee that naked functions emit such a label, but having `cargo asm` work is convenient. https://github.com/pacak/cargo-show-asm/blob/be45f67454ad8b634246a7fc69b3c6a963ee93f1/src/asm/statements.rs#L897-L901 To make the label name unique it's suffixed with the name of the current symbol. r? ```@Amanieu```
Add unstable attribute to BTreeMap-related allocator generics Although these types aren't directly constructable externally, since they're pub, I think this omission was an oversight. r? libs-api
Fix old typo in lang_start_internal comment Noticed this when reading the rt cleanup code; the typo was introduced during a mass port of libstd to std in comments.
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@bors r+ rollup=never p=5 |
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☀️ Test successful - checks-actions |
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📌 Perf builds for each rolled up PR:
previous master: dd7fda5700 In the case of a perf regression, run the following command for each PR you suspect might be the cause: |
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What is this?This is an experimental post-merge analysis report that shows differences in test outcomes between the merged PR and its parent PR.Comparing dd7fda5 (parent) -> dfa2223 (this PR) Test differencesShow 1154 test diffsStage 1
Stage 2
Additionally, 1150 doctest diffs were found. These are ignored, as they are noisy. Job group index
Test dashboardRun cargo run --manifest-path src/ci/citool/Cargo.toml -- \
test-dashboard dfa22235d858086511bedc4acde9db1c045ffbac --output-dir test-dashboardAnd then open Job duration changes
How to interpret the job duration changes?Job durations can vary a lot, based on the actual runner instance |
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Finished benchmarking commit (dfa2223): comparison URL. Overall result: ❌✅ regressions and improvements - please read the text belowOur benchmarks found a performance regression caused by this PR. Next Steps:
@rustbot label: +perf-regression Instruction countOur most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.
Max RSS (memory usage)Results (primary -2.0%, secondary -3.9%)A less reliable metric. May be of interest, but not used to determine the overall result above.
CyclesResults (secondary -0.0%)A less reliable metric. May be of interest, but not used to determine the overall result above.
Binary sizeThis benchmark run did not return any relevant results for this metric. Bootstrap: 472.936s -> 472.257s (-0.14%) |
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There's one tiny regression on a primary @rustbot label: +perf-regression-triaged |
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Rollup of 8 pull requests Successful merges: - rust-lang#140983 (Improve doc of some methods that take ranges) - rust-lang#144091 (Stabilize `new_zeroed_alloc`) - rust-lang#145664 (Stabilize `std::panic::Location::file_as_c_str`) - rust-lang#146551 (fix issue with `cmse-nonsecure-entry` ABI being both async and c-variadic) - rust-lang#146744 (Deref related cleanups in ref_prop) - rust-lang#146793 (naked_asm: emit a label starting with `func_end`) - rust-lang#146820 (Add unstable attribute to BTreeMap-related allocator generics) - rust-lang#146822 (Fix old typo in lang_start_internal comment) r? `@ghost` `@rustbot` modify labels: rollup
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Successful merges:
new_zeroed_alloc#144091 (Stabilizenew_zeroed_alloc)std::panic::Location::file_as_c_str#145664 (Stabilizestd::panic::Location::file_as_c_str)cmse-nonsecure-entryABI being both async and c-variadic #146551 (fix issue withcmse-nonsecure-entryABI being both async and c-variadic)func_end#146793 (naked_asm: emit a label starting withfunc_end)r? @ghost
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