`Cell` and `RefCell` have their `into_inner` methods const unstable.
`OnceCell` has the same logic, so add it under the same gate.
Tracking issue: https://github.com/rust-lang/rust/issues/78729
Set the cfi-normalize-integers and kcfi-offset module flags when
Control-Flow Integrity sanitizers are used, so functions generated by
the LLVM backend use the same CFI/KCFI options as rustc.
cfi-normalize-integers tells LLVM to also use integer normalization
for generated functions when -Zsanitizer-cfi-normalize-integers is
used.
kcfi-offset specifies the number of prefix nops between the KCFI
type hash and the function entry when -Z patchable-function-entry is
used. Note that LLVM assumes all indirectly callable functions use the
same number of prefix NOPs with -Zsanitizer=kcfi.
Force `LC_ALL=C` for all run-make tests
This PR adds `LC_ALL=C` for all run-make tests so that they become locale independent.
Fixes#129362
r? `@jieyouxu`
llvm-wrapper: adapt for LLVM 20 API changes
No functional changes intended.
Adapts llvm-wrapper for the LLVM commits 0f22d47a7a and d6d8243dcd.
`@rustbot` label: +llvm-main
r? `@nikic`
Fix `thread::sleep` Duration-handling for ESP-IDF
Addresses the ESP-IDF specific aspect of https://github.com/rust-lang/rust/issues/129212
#### A short summary of the problems addressed by this PR:
================================================
1. **Problem 1** - the current implementation of `std:🧵:sleep` does not properly round up the passed `Duration`
As per the documentation of `std:🧵:sleep`, the implementation should sleep _at least_ for the provided duration, but not less. Since the minimum supported resolution of the `usleep` syscall which is used with ESP-IDF is one microsecond, this means that we need to round-up any sub-microsecond nanos to one microsecond. Moreover, in the edge case where the user had passed a duration of < 1000 nanos (i.e. less than one microsecond), the current implementation will _not_ sleep _at all_.
This is addressed by this PR.
2. **Problem 2** - the implementation of `usleep` on the ESP-IDF can overflow if the passed number of microseconds is >= `u32::MAX - 1_000_000`
This is also addressed by this PR.
Extra details for Problem 2:
`u32::MAX - 1_000_000` is chosen to accommodate for the longest possible systick on the ESP IDF which is 1000ms.
The systick duration is selected when compiling the ESP IDF FreeRTOS task scheduler itself, so we can't know it from within `STD`. The default systick duration is 10ms, and might be lowered down to 1ms. (Making it longer I have never seen, but in theory it can go up to a 1000ms max, even if obviously a one second systick is unrealistic - but we are paranoid in the PR.)
While the overflow is reported upstream in the ESP IDF repo[^1], I still believe we should workaround it in the Rust wrappers as well, because it might take time until it is fixed, and they might not fix it for all released ESP IDF versions.
For big durations, rather than calling `usleep` repeatedly on the ESP-IDF in chunks of `u32::MAX - 1_000_000`us, it might make sense to call instead with 1_000_000us (one second) as this is the max period that seems to be agreed upon as a safe max period in the `usleep` POSIX spec. On the other hand, that might introduce less precision (as we need to call more times `usleep` in a loop) and, we would be fighting a theoretical problem only, as I have big doubts the ESP IDF will stop supporting durations higher than 1_000_000us - ever - because of backwards compatibility with code which already calls `usleep` on the ESP IDF with bigger durations.
[^1]: https://github.com/espressif/esp-idf/issues/14390
bump conflicting_repr_hints lint to be shown in dependencies
This has been a future compatibility lint for years, let's bump it up to be shown in dependencies (so that hopefully we can then make it a hard error fairly soon).
Cc https://github.com/rust-lang/rust/issues/68585
compiletest: use `std::fs::remove_dir_all` now that it is available
It turns out `aggressive_rm_rf` is not sufficiently aggressive (RAGEY) on Windows and obviously handles Windows symlinks incorrectly. Instead of rolling our own version, let's use `std::fs::remove_dir_all` now that it's available (well, it's been available for a good while, but probably wasn't available when this helper was written).
cc #129187 since basically this is failing due to similar problems.
Blocker for #128562.
Fixes#129155.
Fixes#126334.
Update `library/Cargo.toml` in weekly job
Before the workspace split, the library was covered by the weekly `cargo update` cron job. Now that the library has its own workspace, it doesn't get these updates.
Add `library/Cargo.toml` to the job so updates happen again.
improve submodule updates
During config parsing, some bootstrap logic (e.g., `download-ci-llvm`) checks certain sources (for `download-ci-llvm`, it's `src/llvm-project`) and acts based on their state. This means that if path is a git submodule, bootstrap needs to update it before checking its state. Otherwise it may make incorrect assumptions by relying on outdated sources. To enable submodule updates during config parsing, we need to move the `update_submodule` function from the `Build` to `Config`, so we can access to it during the parsing process.
Closes#122787
bootstrap: fix clean's remove_dir_all implementation
It turns out bootstrap's `clean.rs`'s hand-rolled `rm_rf` (which probably comes before `std::fs::remove_dir_all` was stable) is very broken on native Windows around both read-only files/directories and especially symbolic links. So instead of rolling our own, just use `std::fs::remove_dir_all`.
This is a blocker for compiletest's own `rm_rf` implementation #129155 which happens to be also buggy, which in turn is a blocker for the rmake.rs test port #128562 that heavily exercises symlinks (I was reviewing #128562 and testing it on native Windows which is how I found out).
I also left a FIXME for `detect_src_and_out` due to a failing assertion on native Windows (opened #129188):
```
---- core::config::tests::detect_src_and_out stdout ----
thread 'core::config::tests::detect_src_and_out' panicked at src\core\config\tests.rs:72:13:
assertion `left == right` failed
left: "E:\\tmp"
right: "C:\\tmp"
```
Fixes#112544 (because now we handle Windows symlinks properly).
try-job: x86_64-msvc
try-job: i686-mingw
try-job: test-various
try-job: armhf-gnu
try-job: aarch64-apple
try-job: aarch64-gnu
Point at explicit `'static` obligations on a trait
Given `trait Any: 'static` and a `struct` with a `Box<dyn Any + 'a>` field, point at the `'static` bound in `Any` to explain why `'a: 'static`.
```
error[E0478]: lifetime bound not satisfied
--> f202.rs:2:12
|
2 | value: Box<dyn std::any::Any + 'a>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
note: lifetime parameter instantiated with the lifetime `'a` as defined here
--> f202.rs:1:14
|
1 | struct Hello<'a> {
| ^^
note: but lifetime parameter must outlive the static lifetime
--> /home/gh-estebank/rust/library/core/src/any.rs:113:16
|
113 | pub trait Any: 'static {
| ^^^^^^^
```
Partially address #33652.
Improve diagnostic-related lints: `untranslatable_diagnostic` & `diagnostic_outside_of_impl`
Summary:
- Made `untranslatable_diagnostic` point to problematic arguments instead of the function call
(I found this misleading while working on some `A-translation` PRs: my first impression was that
the methods themselves were not translation-aware and needed to be changed,
while in reality the problem was with the hardcoded strings passed as arguments).
- Made the shared pass of `untranslatable_diagnostic` & `diagnostic_outside_of_impl` more efficient.
`@rustbot` label D-imprecise-spans A-translation
Implement `debug_more_non_exhaustive`
This implements the ACP at https://github.com/rust-lang/libs-team/issues/248, adding `.finish_non_exhaustive()` for `DebugTuple`, `DebugSet`, `DebugList`, and `DebugMap`.
Also used this as an opportunity to make some documentation and tests more readable by using raw strings instead of escaped quotes.
Tracking issue: https://github.com/rust-lang/rust/issues/127942
use old ctx if has same expand environment during decode span
Fixes#112680
The root reason why #112680 failed with incremental compilation on the second attempt is the difference in `opaque` between the span of the field [`ident`](https://github.com/rust-lang/rust/blob/master/compiler/rustc_hir_typeck/src/expr.rs#L2348) and the span in the incremental cache at `tcx.def_ident_span(field.did)`.
- Let's call the span of `ident` as `span_a`, which is generated by [`apply_mark_internal`](https://github.com/rust-lang/rust/blob/master/compiler/rustc_span/src/hygiene.rs#L553-L554). Its content is similar to:
```rs
span_a_ctx -> SyntaxContextData {
opaque: span_a_ctx,
opaque_and_semitransparent: span_a_ctx,
// ....
}
```
- And call the span of `tcx.def_ident_span` as `span_b`, which is generated by [`decode_syntax_context`](https://github.com/rust-lang/rust/blob/master/compiler/rustc_span/src/hygiene.rs#L1390). Its content is:
```rs
span_b_ctx -> SyntaxContextData {
opaque: span_b_ctx,
// note `span_b_ctx` is not same as `span_a_ctx`
opaque_and_semitransparent: span_b_ctx,
// ....
}
```
Although they have the same `parent` (both refer to the root) and `outer_expn`, I cannot find the specific connection between them. Therefore, I chose a solution that may not be the best: give up the incremental compile cache to ensure we can use `span_a` in this case.
r? `@petrochenkov` Do you have any advice on this? Or perhaps this solution is acceptable?
Rollup of 10 pull requests
Successful merges:
- #128627 (Special case DUMMY_SP to emit line 0/column 0 locations on DWARF platforms.)
- #128843 (Minor Refactor: Remove a Redundant Conditional Check)
- #129179 (CFI: Erase regions when projecting ADT to its transparent non-1zst field)
- #129281 (Tweak unreachable lint wording)
- #129312 (Fix stability attribute of `impl !Error for &str`)
- #129332 (Avoid extra `cast()`s after `CStr::as_ptr()`)
- #129339 (Make `ArgAbi::make_indirect_force` more specific)
- #129344 (Use `bool` in favor of `Option<()>` for diagnostics)
- #129345 (Use shorthand field initialization syntax more aggressively in the compiler)
- #129355 (fix comment on PlaceMention semantics)
r? `@ghost`
`@rustbot` modify labels: rollup
Given `trait Any: 'static` and a `struct` with a `Box<dyn Any + 'a>` field, point at the `'static` bound in `Any` to explain why `'a: 'static`.
```
error[E0478]: lifetime bound not satisfied
--> f202.rs:2:12
|
2 | value: Box<dyn std::any::Any + 'a>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
note: lifetime parameter instantiated with the lifetime `'a` as defined here
--> f202.rs:1:14
|
1 | struct Hello<'a> {
| ^^
note: but lifetime parameter must outlive the static lifetime
--> /home/gh-estebank/rust/library/core/src/any.rs:113:16
|
113 | pub trait Any: 'static {
| ^^^^^^^
```
Partially address #33652.
Use shorthand field initialization syntax more aggressively in the compiler
Caught these when cleaning up #129344 and decided to run clippy to find the rest
Use `bool` in favor of `Option<()>` for diagnostics
We originally only supported `Option<()>` for optional notes/labels, but we now support `bool`. Let's use that, since it usually leads to more readable code.
I'm not removing the support from the derive macro, though I guess we could error on it... 🤔
Make `ArgAbi::make_indirect_force` more specific
As the method is only needed for making ignored ZSTs indirect on some ABIs, rename and add a doc-comment and `self.mode` check to make it harder to accidentally misuse. Addresses review feedback from https://github.com/rust-lang/rust/pull/125854#discussion_r1721047899.
r? ``@RalfJung``
Avoid extra `cast()`s after `CStr::as_ptr()`
These used to be `&str` literals that did need a pointer cast, but that
became a no-op after switching to `c""` literals in #118566.
CFI: Erase regions when projecting ADT to its transparent non-1zst field
The output from `FieldDef::ty` (or `TyCtxt::type_of`) may have free regions (well, `'static`) -- erase it.
Fixes#129169Fixes#123685
Minor Refactor: Remove a Redundant Conditional Check
The existing code checks `where_bounds.is_empty()` twice when
it can be combined into one. Now, after combining, the refactored code reads
better and feels straightforward.
The diff doesn't make it clear. So, the current code looks like this:
``` rust
if !where_bounds.is_empty() {
err.help(format!(
"consider introducing a new type parameter `T` and adding `where` constraints:\
\n where\n T: {qself_str},\n{}",
where_bounds.join(",\n"),
));
}
let reported = err.emit();
if !where_bounds.is_empty() {
return Err(reported);
}
```
The proposed changes:
``` rust
if !where_bounds.is_empty() {
err.help(format!(
"consider introducing a new type parameter `T` and adding `where` constraints:\
\n where\n T: {qself_str},\n{}",
where_bounds.join(",\n"),
));
let reported = err.emit();
return Err(reported);
}
err.emit();
```
Special case DUMMY_SP to emit line 0/column 0 locations on DWARF platforms.
Line 0 has a special meaning in DWARF. From the version 5 spec:
The compiler may emit the value 0 in cases
where an instruction cannot be attributed to any
source line.
DUMMY_SP spans cannot be attributed to any line. However, because rustc internally stores line numbers starting at zero, lookup_debug_loc() adjusts every line number by one. Special casing DUMMY_SP to actually emit line 0 ensures rustc communicates to the debugger that there's no meaningful source code for this instruction, rather than telling the debugger to jump to line 1 randomly.
