Refactor stack overflow handling
Currently, every platform must implement a `Guard` that protects a thread from stack overflow. However, UNIX is the only platform that actually does so. Windows has a different mechanism for detecting stack overflow, while the other platforms don't detect it at all. Also, the UNIX stack overflow handling is split between `sys::pal::unix::stack_overflow`, which implements the signal handler, and `sys::pal::unix::thread`, which detects/installs guard pages.
This PR cleans this by getting rid of `Guard` and unifying UNIX stack overflow handling inside `stack_overflow` (commit 1). Therefore we can get rid of `sys_common::thread_info`, which stores `Guard` and the current `Thread` handle and move the `thread::current` TLS variable into `thread` (commit 2).
The second commit is not strictly speaking necessary. To keep the implementation clean, I've included it here, but if it causes too much noise, I can split it out without any trouble.
match lowering: handle or-patterns one layer at a time
`create_or_subcandidates` and `merge_trivial_subcandidates` both call themselves recursively to handle nested or-patterns, which is hard to follow. In this PR I avoid the need for that; we now process a single "layer" of or-patterns at a time.
By calling back into `match_candidates`, we only need to expand one layer at a time. Conversely, since we always try to simplify a layer that we just expanded (thanks to https://github.com/rust-lang/rust/pull/123067), we only have to merge one layer at a time.
r? `@matthewjasper`
pattern analysis: Use contiguous indices for enum variants
The main blocker to using the in-tree version of the `pattern_analysis` crate is that rustc requires enum indices to be contiguous because it uses `IndexVec`/`BitSet` for performance. Currently we swap these out for `FxHashMap`/`FxHashSet` when the `rustc` feature is off, but we can't do that if we use the in-tree crate.
This PR solves the problem by using contiguous indices on the r-a side too.
Fix crate IDs when multiple workspaces are loaded
Previously, we assumed that the crate numbers in a `rust-project.json` always matched the `CrateId` values in the crate graph. This isn't true when there are multiple workspaces, because the crate graphs are merged and the `CrateId` values in the merged graph are different.
This broke flycheck (see first commit), because we were unable to find the workspace when a file changed, so we every single flycheck, producing duplicate compilation errors.
Instead, use the crate root module path to look up the relevant flycheck. This makes `ProjectWorkspace::Json` consistenet with `ProjectWorkspace::Cargo`.
Also, define a separate JSON crate number type, to prevent bugs like this happening again.
feat: Add `rust-analyzer.cargo.allTargets` to configure passing `--all-targets` to cargo invocations
Closes#16859
## Unresolved question:
Should this be a setting for build scripts only ? All the other `--all-targets` I found where already covered by `checkOnSave.allTargets`
Fix tasks in tasks.json
#16839 refactored the representation of tasks inside the VS Code extension. However, this data type is exposed to users, who can define their own tasks in the same format in `tasks.json` or `.code-workspace`.
Revert the data type to have a `command` field rather than a `program` field, and document the different fields. This code is also a little complex, so split out a `cargoToExecution` to handle the Task to Execution conversion logic.
After this change, any tasks.json with a `command` field works again. For example, the following tasks.json works as expected:
```
{
"version": "2.0.0",
"tasks": [
{
"type": "cargo",
"command": "build",
"problemMatcher": [
"$rustc"
],
"group": "build",
"label": "my example cargo build task"
}
]
}
```
Fixes#16943#16949
update: add editor/extension information to bug report template
When attempting to reproduce issues, I encounter difficulties due to differences in versions of LSP clients and editors (such as #16985, #16867, and more)
This sometimes consumes a lot of efforts from contributors to communicate the details about LSP client information. Therefore, I believe adding editor/extension information to the issue template would be helpful for problem reproduction.
Refactor the way bootstrap invokes `cargo miri`
Instead of basically doing `cargo run --manifest-path=<cargo-miri's manifest> -- miri`, let's invoke the `cargo-miri` binary directly. That means less indirections, and also makes it easier to e.g. run the libcore test suite in Miri. (But there are still other issues with that.)
Also also adjusted Miri's stage numbering so that it is consistent with rustc/rustdoc.
This also makes `./x.py test miri` honor `--no-doc`.
And this fixes https://github.com/rust-lang/rust/issues/123177 by moving where we handle parallel_compiler.
Use the `Align` type when parsing alignment attributes
Use the `Align` type in `rustc_attr::parse_alignment`, removing the need to call `Align::from_bytes(...).unwrap()` later in the compilation process.
Stabilize `unchecked_{add,sub,mul}`
Tracking issue: #85122
I think we might as well just stabilize these basic three. They're the ones that have `nuw`/`nsw` flags in LLVM.
Notably, this doesn't include the potentially-more-complex or -more-situational things like `unchecked_neg` or `unchecked_shr` that are under different feature flags.
To quote Ralf https://github.com/rust-lang/rust/issues/85122#issuecomment-1681669646,
> Are there any objections to stabilizing at least `unchecked_{add,sub,mul}`? For those there shouldn't be any surprises about what their safety requirements are.
*Semantially* these are [already available on stable, even in `const`, via](https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=bdb1ff889b61950897f1e9f56d0c9a36) `checked_*`+`unreachable_unchecked`. So IMHO we might as well just let people write them directly, rather than try to go through a `let Some(x) = x.checked_add(y) else { unsafe { hint::unreachable_unchecked() }};` dance.
I added additional text to each method to attempt to better describe the behaviour and encourage `wrapping_*` instead.
r? rust-lang/libs-api
fix: use lldb when debugging with C++ extension on MacOS
See https://github.com/rust-lang/rust-analyzer/issues/16901#issuecomment-2024486941
This PR resolves the issue of being unable to debug using the C++ extension on macOS. By using special configurations for the `MIMode` on macOS, it enables the C++ extension to connect to lldb when debugging (without affecting other platforms).
fix: lifetime length are not added in count of params in highlight
I found these two instances easily but I wonder how many such instances are there.
Fixes#16958
