Implement new gdb/lldb pretty-printers
Reopened#60826
This PR replaces current gdb and lldb pretty-printers with new ones that were originally written for [IntelliJ Rust](https://github.com/intellij-rust/intellij-rust/tree/master/prettyPrinters).
The current state of lldb pretty-printers is poor, because [they don't use synthetic children](https://github.com/rust-lang/rust/issues/55586#issuecomment-436610063). When I started to reimplement lldb pretty-printers with synthetic children support, I've found current version strange and hard to support. I think `debugger_pretty_printers_common.py` is overkill, so I got rid of it.
The new pretty-printers have to support all types supported by current pretty-printers, and also support `Rc`, `Arc`, `Cell`, `Ref`, `RefCell`, `RefMut`, `HashMap`, `HashSet`.
Fixes#56252
Rollup of 10 pull requests
Successful merges:
- #72707 (Use min_specialization in the remaining rustc crates)
- #72740 (On recursive ADT, provide indirection structured suggestion)
- #72879 (Miri: avoid tracking current location three times)
- #72938 (Stabilize Option::zip)
- #73086 (Rename "cyclone" to "apple-a7" per changes in upstream LLVM)
- #73104 (Example about explicit mutex dropping)
- #73139 (Add methods to go from a nul-terminated Vec<u8> to a CString)
- #73296 (Remove vestigial CI job msvc-aux.)
- #73304 (Revert heterogeneous SocketAddr PartialEq impls)
- #73331 (extend network support for HermitCore)
Failed merges:
r? @ghost
Revert heterogeneous SocketAddr PartialEq impls
Originally added in #72239.
These lead to inference regressions (mostly in tests) in code that looks like:
```rust
let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
assert_eq!(socket, "127.0.0.1:8080".parse().unwrap());
```
That compiles as of stable 1.44.0 but fails in beta with:
```console
error[E0284]: type annotations needed
--> src/main.rs:3:41
|
3 | assert_eq!(socket, "127.0.0.1:8080".parse().unwrap());
| ^^^^^ cannot infer type for type parameter `F` declared on the associated function `parse`
|
= note: cannot satisfy `<_ as std::str::FromStr>::Err == _`
help: consider specifying the type argument in the method call
|
3 | assert_eq!(socket, "127.0.0.1:8080".parse::<F>().unwrap());
|
```
Closes#73242.
Remove vestigial CI job msvc-aux.
This CI job isn't really doing anything, so it seems prudent to remove it.
For some history:
* This was introduced in #48809 when the msvc job was split in two to keep it under 2 hours (oh the good old days). At the time, this check-aux job did a bunch of things:
* tidy
* src/test/pretty
* src/test/run-pass/pretty
* src/test/run-fail/pretty
* src/test/run-pass-valgrind/pretty
* src/test/run-pass-fulldeps/pretty
* src/test/run-fail-fulldeps/pretty
* Tidy was removed in #60777.
* run-pass and run-pass-fulldeps moved to UI in #63029
* src/test/pretty removed in #58140
* src/test/run-fail moved to UI in #71185
* run-fail-fulldeps removed in #51285
Over time through attrition, the job was left with one lonely thing: `src/test/run-pass-valgrind/pretty`. And of course, this wasn't actually running the "pretty" tests. The normal `run-pass-valgrind` tests ran, and then when it tried to run in "pretty" mode, all the tests were ignored because compiletest thought nothing had changed (apparently compiletest isn't fingerprinting the mode? Needs more investigation…). `run-pass-valgrind` is already being run as part of `x86_64-msvc-1`, so there's no need to run it here.
I've taken the liberty of removing `src/test/run-pass-valgrind/pretty` as a distinct test. I'm guessing from the other PR's that the pretty tests should now live in `src/test/pretty`, and that the team has moved away from doing pretty tests on other parts of the `src/test` tree.
Add methods to go from a nul-terminated Vec<u8> to a CString
Fixes#73100.
Doc tests have been written and the documentation on the error type
updated too.
I used `#[stable(feature = "cstring_from_vec_with_nul", since = "1.46.0")]` but I don't know if the version is correct.
Example about explicit mutex dropping
Fixes#67457.
Following the remarks made in #73074, I added an example on the main `Mutex` type, with a situation where there is mutable data and a computation result.
In my testing it is effectively needed to explicitly drop the lock, else it deadlocks.
r? @dtolnay because you were the one to review the previous PR.
Stabilize Option::zip
This PR stabilizes the following API:
```rust
impl<T> Option<T> {
pub fn zip<U>(self, other: Option<U>) -> Option<(T, U)>;
}
```
This API has real world usage as seen in <https://grep.app/search?q=-%3E%20Option%3C%5C%28T%2C%5Cs%3FU%5C%29%3E®exp=true&filter[lang][0]=Rust>.
The `zip_with` method is left unstably as this API is kinda niche
and it hasn't received much usage in Rust repositories on GitHub.
cc #70086
Miri: avoid tracking current location three times
Miri tracks the current instruction to execute in the call stack, but it also additionally has two `TyCtxtAt` that carry a `Span` that also tracks the current instruction. That is quite silly, so this PR uses `TyCtxt` instead, and then uses a method for computing the current span when a `TyCtxtAt` is needed. Having less redundant (semi-)global state seems like a good improvement to me. :D
To keep the ConstProp errors the same, I had to add the option to `error_to_const_error` to overwrite the span. Also for some reason this changes cycle errors a bit -- not sure if we are now better or worse as giving those queries the right span. (It is unfortunately quite easy to accidentally use `DUMMY_SP` by calling the query on a `TyCtxt` instead of a `TyCtxtAt`.)
r? @oli-obk @eddyb
Use min_specialization in the remaining rustc crates
This adds a lot of `transmute` calls to replace the unsound uses of specialization.
It's ugly, but at least it's honest about what's going on.
cc #71420, @RalfJung
structural_match: non-structural-match ty closures
Fixes#73003.
This PR adds a `Closure` variant to `NonStructuralMatchTy` in `structural_match`, fixing an ICE which can occur when `impl_trait_in_bindings` is used with constants.
Fix iterator copied() documentation example code
The documentation for copied() gives example code with variable v_cloned instead of v_copied. This seems like a copy/paste error from cloned() and it would be clearer to use v_copied.
Display information about captured variable in `FnMut` error
Fixes#69446
When we encounter a region error involving an `FnMut` closure, we
display a specialized error message. However, we currently do not
tell the user which upvar was captured. This makes it difficult to
determine the cause of the error, especially when the closure is large.
This commit records marks constraints involving closure upvars
with `ConstraintCategory::ClosureUpvar`. When we decide to 'blame'
a `ConstraintCategory::Return`, we additionall store
the captured upvar if we found a `ConstraintCategory::ClosureUpvar` in
the path.
When generating an error message, we point to relevant spans if we have
closure upvar information available. We further customize the message if
an `async` closure is being returned, to make it clear that the captured
variable is being returned indirectly.
Stabilize vec::Drain::as_slice
and add `AsRef<[T]> for Drain<'_, T>`.
Tracking issue: #58957. Does not stabilize `slice::IterMut::as_slice` yet. cc @cuviper
This PR proposes stabilizing just the `vec::Drain::as_slice` part of that tracking issue.
My ultimate goal here: being able to use `for<T, I: Iterator<Item=T> + AsRef<[T]>> I` to refer to `vec::IntoIter`, `vec::Drain`, and eventually `array::IntoIter`, as an approximation of the set of by-value iterators that can be "previewed" as by-ref iterators. (Actually expressing that as a trait requires GAT.)
Fix trait alias inherent impl resolution
Fixes#60021 and fixes#72415.
Obviously, the fix was very easy, but getting started with the testing and debugging rust compiler was an interesting experience. Now I can cross it off my bucket list!
Explain move errors that occur due to method calls involving `self`
When calling a method that takes `self` (e.g. `vec.into_iter()`), the method receiver is moved out of. If the method receiver is used again, a move error will be emitted::
```rust
fn main() {
let a = vec![true];
a.into_iter();
a;
}
```
emits
```
error[E0382]: use of moved value: `a`
--> src/main.rs:4:5
|
2 | let a = vec![true];
| - move occurs because `a` has type `std::vec::Vec<bool>`, which does not implement the `Copy` trait
3 | a.into_iter();
| - value moved here
4 | a;
| ^ value used here after move
```
However, the error message doesn't make it clear that the move is caused by the call to `into_iter`.
This PR adds additional messages to move errors when the move is caused by using a value as the receiver of a `self` method::
```
error[E0382]: use of moved value: `a`
--> vec.rs:4:5
|
2 | let a = vec![true];
| - move occurs because `a` has type `std::vec::Vec<bool>`, which does not implement the `Copy` trait
3 | a.into_iter();
| ------------- value moved due to this method call
4 | a;
| ^ value used here after move
|
note: this function takes `self`, which moves the receiver
--> /home/aaron/repos/rust/src/libcore/iter/traits/collect.rs:239:5
|
239 | fn into_iter(self) -> Self::IntoIter;
```
TODO:
- [x] Add special handling for `FnOnce/FnMut/Fn` - we probably don't want to point at the unstable trait methods
- [x] Consider adding additional context for operations (e.g. `Shr::shr`) when the call was generated using the operator syntax (e.g. `a >> b`)
- [x] Consider pointing to the method parent (impl or trait block) in addition to the method itself.
Check for live drops in constants after drop elaboration
Resolves#66753.
This PR splits the MIR "optimization" pass series in two and introduces a query–`mir_drops_elaborated_and_const_checked`–that holds the result of the `post_borrowck_cleanup` analyses and checks for live drops. This query is invoked in `rustc_interface` for all items requiring const-checking, which means we now do `post_borrowck_cleanup` for items even if they are unused in the crate.
As a result, we are now more precise about when drops are live. This is because drop elaboration can e.g. eliminate drops of a local when all its fields are moved from. This does not mean we are doing value-based analysis on move paths, however; Storing a `Some(CustomDropImpl)` into a field of a local will still set the qualifs for that entire local.
r? @oli-obk
Clean up type alias impl trait implementation
- Removes special case for top-level impl trait
- Removes associated opaque types
- Forbid lifetime elision in let position impl trait. This is consistent with the behavior for inferred types.
- Handle lifetimes in type alias impl trait more uniformly with other parameters
cc #69323
cc #63063Closes#57188Closes#62988Closes#69136Closes#73061
This commit adds a `Closure` variant to `NonStructuralMatchTy` in
`structural_match`, fixing an ICE which can occur when
`impl_trait_in_bindings` is used with constants.
Signed-off-by: David Wood <david@davidtw.co>
Update musl to 1.1.24
Release notes since previous version 1.1.22:
## 1.1.23 release notes
### new features:
- riscv64 port
- configure now allows customizing AR and RANLIB vars
- header-level support for new linux features in 5.1
### major internal changes:
- removed extern __syscall; syscall header code is now fully self-contained
### performance:
- new math library implementation for log/exp/pow
- aarch64 dynamic tlsdesc function is streamlined
### compatibility & conformance:
- O_TTY_INIT is now defined
- sys/types.h no longer pollutes namespace with sys/sysmacros.h in any profile
- powerpc asm is now compatible with clang internal assembler
### changes for new POSIX interpretations:
- fgetwc now sets stream error indicator on encoding errors
- fmemopen no longer rejects 0 size
### bugs fixed:
- static TLS for shared libraries was allocated wrong on "Variant I" archs
- crash in dladdr reading through uninitialized pointer on non-match
- sigaltstack wrongly errored out on invalid ss_size when doing SS_DISABLE
- getdents function misbehaved with buffer length larger than INT_MAX
- set*id could deadlock after fork from multithreaded process
### arch-specfic bugs fixed:
- s390x SO_PEERSEC definition was wrong
- passing of 64-bit syscall arguments was broken on microblaze
- posix_fadvise was broken on mips due to missing 7-arg syscall support
- vrregset_t layout and member naming was wrong on powerpc64
## 1.1.24 release notes
### new features:
- GLOB_TILDE extension to glob
- non-stub catgets localization API, using netbsd binary catalog format
- posix_spawn file actions for [f]chdir (extension, pending future standard)
- secure_getenv function (extension)
- copy_file_range syscall wrapper (Linux extension)
- header-level support for new linux features in 5.2
### performance:
- new fast path for lrint (generic C version) on 32-bit archs
### major internal changes:
- functions involving time are overhauled to be time64-ready in 32-bit archs
- x32 uses the new time64 code paths to replace nasty hacks in syscall glue
### compatibility & conformance:
- support for powerpc[64] unaligned relocation types
- powerpc[64] and sh sys/user.h no longer clash with kernel asm/ptrace.h
- select no longer modifies timeout on failure (or at all)
- mips64 stat results are no longer limited to 32-bit time range
- optreset (BSD extension) now has a public declaration
- support for clang inconsistencies in wchar_t type vs some 32-bit archs
- mips r6 syscall asm no longer has invalid lo/hi register clobbers
- vestigial asm declarations of __tls_get_new are removed (broke some tooling)
- riscv64 mcontext_t mismatch glibc's member naming is corrected
### bugs fixed:
- glob failed to match broken symlinks consistently
- invalid use of interposed calloc to allocate initial TLS
- various dlsym symbol resolution logic errors
- semctl with SEM_STAT_ANY didn't work
- pthread_create with explicit scheduling was subject to priority inversion
- pthread_create failure path had data race for thread count
- timer_create with SIGEV_THREAD notification had data race getting timer id
- wide printf family failed to support l modifier for float formats
### arch-specific bugs fixed:
- x87 floating point stack imbalance in math asm (i386-only CVE-2019-14697)
- x32 clock_adjtime, getrusage, wait3, wait4 produced junk (struct mismatches)
- lseek broken on x32 and mipsn32 with large file offsets
- riscv64 atomics weren't compiler barriers
- riscv64 atomics had broken asm constraints (missing earlyclobber flag)
- arm clone() was broken when compiled as thumb if start function returned
- mipsr6 setjmp/longjmp did not preserve fpu register state correctly
Fixes#71099.
x.py: do not build Miri by default on stable/beta
Fixes https://github.com/rust-lang/rust/issues/73117
Do I need to do anything to make sure Miri is still built by the tools CI builder? Are there other tools that should be off-by-default?
Also, unfortunately the `DEFAULT` associated const has no doc comment, so I have no idea what it does, or why there are semmingly two places where the default build of tools is controlled.
