chore: import rustc 1.81.0

Author: MingcongBai

Cargo.lock

@@ -23,7 +23,6 @@ members = [
   "src/tools/remote-test-client",
   "src/tools/remote-test-server",
   "src/tools/rust-installer",
-  "src/tools/rust-demangler",
   "src/tools/rustdoc",
   "src/tools/rls",
   "src/tools/rustfmt",
@@ -45,6 +44,8 @@ members = [
   "src/tools/rustdoc-gui-test",
   "src/tools/opt-dist",
   "src/tools/coverage-dump",
+  "src/tools/rustc-perf-wrapper",
+  "src/tools/wasm-component-ld",
 ]
 
 exclude = [
@@ -104,6 +105,9 @@ rustc-demangle.debug = 0
 [profile.release.package.lld-wrapper]
 debug = 0
 strip = true
+[profile.release.package.wasm-component-ld-wrapper]
+debug = 0
+strip = true
 
 [patch.crates-io]
 # See comments in `library/rustc-std-workspace-core/README.md` for what's going on

Cargo.toml

@@ -1,4 +1,130 @@
-Version 1.80 (2024-07-25)
+Version 1.81.0 (2024-09-05)
+==========================
+
+<a id="1.81.0-Language"></a>
+
+Language
+--------
+
+- [Abort on uncaught panics in `extern "C"` functions.](https://github.com/rust-lang/rust/pull/116088/)
+- [Fix ambiguous cases of multiple `&` in elided self lifetimes.](https://github.com/rust-lang/rust/pull/117967/)
+- [Stabilize `#[expect]` for lints (RFC 2383),](https://github.com/rust-lang/rust/pull/120924/) like `#[allow]` with a warning if the lint is _not_ fulfilled.
+- [Change method resolution to constrain hidden types instead of rejecting method candidates.](https://github.com/rust-lang/rust/pull/123962/)
+- [Bump `elided_lifetimes_in_associated_constant` to deny.](https://github.com/rust-lang/rust/pull/124211/)
+- [`offset_from`: always allow pointers to point to the same address.](https://github.com/rust-lang/rust/pull/124921/)
+- [Allow constraining opaque types during subtyping in the trait system.](https://github.com/rust-lang/rust/pull/125447/)
+- [Allow constraining opaque types during various unsizing casts.](https://github.com/rust-lang/rust/pull/125610/)
+- [Deny keyword lifetimes pre-expansion.](https://github.com/rust-lang/rust/pull/126762/)
+
+<a id="1.81.0-Compiler"></a>
+
+Compiler
+--------
+
+- [Make casts of pointers to trait objects stricter.](https://github.com/rust-lang/rust/pull/120248/)
+- [Check alias args for well-formedness even if they have escaping bound vars.](https://github.com/rust-lang/rust/pull/123737/)
+- [Deprecate no-op codegen option `-Cinline-threshold=...`.](https://github.com/rust-lang/rust/pull/124712/)
+- [Re-implement a type-size based limit.](https://github.com/rust-lang/rust/pull/125507/)
+- [Properly account for alignment in `transmute` size checks.](https://github.com/rust-lang/rust/pull/125740/)
+- [Remove the `box_pointers` lint.](https://github.com/rust-lang/rust/pull/126018/)
+- [Ensure the interpreter checks bool/char for validity when they are used in a cast.](https://github.com/rust-lang/rust/pull/126265/)
+- [Improve coverage instrumentation for functions containing nested items.](https://github.com/rust-lang/rust/pull/127199/)
+- Target changes:
+  - [Add Tier 3 `no_std` Xtensa targets:](https://github.com/rust-lang/rust/pull/125141/) `xtensa-esp32-none-elf`, `xtensa-esp32s2-none-elf`, `xtensa-esp32s3-none-elf`
+  - [Add Tier 3 `std` Xtensa targets:](https://github.com/rust-lang/rust/pull/126380/) `xtensa-esp32-espidf`, `xtensa-esp32s2-espidf`, `xtensa-esp32s3-espidf`
+  - [Add Tier 3 i686 Redox OS target:](https://github.com/rust-lang/rust/pull/126192/) `i686-unknown-redox`
+  - [Promote `arm64ec-pc-windows-msvc` to Tier 2.](https://github.com/rust-lang/rust/pull/126039/)
+  - [Promote `wasm32-wasip2` to Tier 2.](https://github.com/rust-lang/rust/pull/126967/)
+  - [Promote `loongarch64-unknown-linux-musl` to Tier 2 with host tools.](https://github.com/rust-lang/rust/pull/126298/)
+  - [Enable full tools and profiler for LoongArch Linux targets.](https://github.com/rust-lang/rust/pull/127078/)
+  - [Unconditionally warn on usage of `wasm32-wasi`.](https://github.com/rust-lang/rust/pull/126662/) (see compatibility note below)
+  - Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support.
+
+<a id="1.81.0-Libraries"></a>
+
+Libraries
+---------
+
+- [Split core's `PanicInfo` and std's `PanicInfo`.](https://github.com/rust-lang/rust/pull/115974/) (see compatibility note below)
+- [Generalize `{Rc,Arc}::make_mut()` to unsized types.](https://github.com/rust-lang/rust/pull/116113/)
+- [Replace sort implementations with stable `driftsort` and unstable `ipnsort`.](https://github.com/rust-lang/rust/pull/124032/) All `slice::sort*` and `slice::select_nth*` methods are expected to see significant performance improvements. See the [research project](https://github.com/Voultapher/sort-research-rs) for more details.
+- [Document behavior of `create_dir_all` with respect to empty paths.](https://github.com/rust-lang/rust/pull/125112/)
+- [Fix interleaved output in the default panic hook when multiple threads panic simultaneously.](https://github.com/rust-lang/rust/pull/127397/)
+- Fix `Command`'s batch files argument escaping not working when file name has trailing whitespace or periods (CVE-2024-43402).
+
+<a id="1.81.0-Stabilized-APIs"></a>
+
+Stabilized APIs
+---------------
+
+- [`core::error`](https://doc.rust-lang.org/stable/core/error/index.html)
+- [`hint::assert_unchecked`](https://doc.rust-lang.org/stable/core/hint/fn.assert_unchecked.html)
+- [`fs::exists`](https://doc.rust-lang.org/stable/std/fs/fn.exists.html)
+- [`AtomicBool::fetch_not`](https://doc.rust-lang.org/stable/core/sync/atomic/struct.AtomicBool.html#method.fetch_not)
+- [`Duration::abs_diff`](https://doc.rust-lang.org/stable/core/time/struct.Duration.html#method.abs_diff)
+- [`IoSlice::advance`](https://doc.rust-lang.org/stable/std/io/struct.IoSlice.html#method.advance)
+- [`IoSlice::advance_slices`](https://doc.rust-lang.org/stable/std/io/struct.IoSlice.html#method.advance_slices)
+- [`IoSliceMut::advance`](https://doc.rust-lang.org/stable/std/io/struct.IoSliceMut.html#method.advance)
+- [`IoSliceMut::advance_slices`](https://doc.rust-lang.org/stable/std/io/struct.IoSliceMut.html#method.advance_slices)
+- [`PanicHookInfo`](https://doc.rust-lang.org/stable/std/panic/struct.PanicHookInfo.html)
+- [`PanicInfo::message`](https://doc.rust-lang.org/stable/core/panic/struct.PanicInfo.html#method.message)
+- [`PanicMessage`](https://doc.rust-lang.org/stable/core/panic/struct.PanicMessage.html)
+
+These APIs are now stable in const contexts:
+
+- [`char::from_u32_unchecked`](https://doc.rust-lang.org/stable/core/char/fn.from_u32_unchecked.html) (function)
+- [`char::from_u32_unchecked`](https://doc.rust-lang.org/stable/core/primitive.char.html#method.from_u32_unchecked) (method)
+- [`CStr::count_bytes`](https://doc.rust-lang.org/stable/core/ffi/c_str/struct.CStr.html#method.count_bytes)
+- [`CStr::from_ptr`](https://doc.rust-lang.org/stable/core/ffi/c_str/struct.CStr.html#method.from_ptr)
+
+<a id="1.81.0-Cargo"></a>
+
+Cargo
+-----
+
+- [Generated `.cargo_vcs_info.json` is always included, even when `--allow-dirty` is passed.](https://github.com/rust-lang/cargo/pull/13960/)
+- [Disallow `package.license-file` and `package.readme` pointing to non-existent files during packaging.](https://github.com/rust-lang/cargo/pull/13921/)
+- [Disallow passing `--release`/`--debug` flag along with the `--profile` flag.](https://github.com/rust-lang/cargo/pull/13971/)
+- [Remove `lib.plugin` key support in `Cargo.toml`. Rust plugin support has been deprecated for four years and was removed in 1.75.0.](https://github.com/rust-lang/cargo/pull/13902/)
+
+<a id="1.81.0-Compatibility-Notes"></a>
+
+Compatibility Notes
+-------------------
+
+* Usage of the `wasm32-wasi` target will now issue a compiler warning and request users switch to the `wasm32-wasip1` target instead. Both targets are the same, `wasm32-wasi` is only being renamed, and this [change to the WASI target](https://blog.rust-lang.org/2024/04/09/updates-to-rusts-wasi-targets.html) is being done to enable removing `wasm32-wasi` in January 2025.
+
+* We have renamed `std::panic::PanicInfo` to `std::panic::PanicHookInfo`. The old name will continue to work as an alias, but will result in a deprecation warning starting in Rust 1.82.0.
+
+  `core::panic::PanicInfo` will remain unchanged, however, as this is now a *different type*.
+ 
+  The reason is that these types have different roles: `std::panic::PanicHookInfo` is the argument to the [panic hook](https://doc.rust-lang.org/stable/std/panic/fn.set_hook.html) in std context (where panics can have an arbitrary payload), while `core::panic::PanicInfo` is the argument to the [`#[panic_handler]`](https://doc.rust-lang.org/nomicon/panic-handler.html) in no_std context (where panics always carry a formatted *message*). Separating these types allows us to add more useful methods to these types, such as `std::panic::PanicHookInfo::payload_as_str()` and `core::panic::PanicInfo::message()`.
+
+* The new sort implementations may panic if a type's implementation of [`Ord`](https://doc.rust-lang.org/std/cmp/trait.Ord.html) (or the given comparison function) does not implement a [total order](https://en.wikipedia.org/wiki/Total_order) as the trait requires. `Ord`'s supertraits (`PartialOrd`, `Eq`, and `PartialEq`) must also be consistent. The previous implementations would not "notice" any problem, but the new implementations have a good chance of detecting inconsistencies, throwing a panic rather than returning knowingly unsorted data.
+* [In very rare cases, a change in the internal evaluation order of the trait
+  solver may result in new fatal overflow errors.](https://github.com/rust-lang/rust/pull/126128)
+
+
+<a id="1.81.0-Internal-Changes"></a>
+
+Internal Changes
+----------------
+
+These changes do not affect any public interfaces of Rust, but they represent
+significant improvements to the performance or internals of rustc and related
+tools.
+
+- [Add a Rust-for Linux `auto` CI job to check kernel builds.](https://github.com/rust-lang/rust/pull/125209/)
+
+Version 1.80.1 (2024-08-08)
+===========================
+
+<a id="1.80.1"></a>
+
+- [Fix miscompilation in the jump threading MIR optimization when comparing floats](https://github.com/rust-lang/rust/pull/128271)
+- [Revert changes to the `dead_code` lint from 1.80.0](https://github.com/rust-lang/rust/pull/128618)
+
+Version 1.80.0 (2024-07-25)
 ==========================
 
 <a id="1.80-Language"></a>
@@ -143,6 +269,8 @@ Compatibility Notes
 - [Turn `proc_macro_back_compat` lint into a hard error.](https://github.com/rust-lang/rust/pull/125596/)
 - [Detect unused structs even when implementing private traits](https://github.com/rust-lang/rust/pull/122382/)
 - [`std::sync::ReentrantLockGuard<T>` is no longer `Sync` if `T: !Sync`](https://github.com/rust-lang/rust/pull/125527) which means [`std::io::StdoutLock` and `std::io::StderrLock` are no longer Sync](https://github.com/rust-lang/rust/issues/127340)
+- [Type inference will fail in some cases due to new implementations of `FromIterator for Box<str>`.](https://github.com/rust-lang/rust/pull/99969/)
+  Notably, this breaks versions of the `time` crate before 0.3.35, due to no longer inferring the implementation for `Box<[_]>`.
 
 <a id="1.80-Internal-Changes"></a>
 

RELEASES.md

@@ -27,7 +27,7 @@ features = ['unprefixed_malloc_on_supported_platforms']
 
 [features]
 # tidy-alphabetical-start
-jemalloc = ['jemalloc-sys']
+jemalloc = ['dep:jemalloc-sys']
 llvm = ['rustc_driver_impl/llvm']
 max_level_info = ['rustc_driver_impl/max_level_info']
 rustc_use_parallel_compiler = ['rustc_driver_impl/rustc_use_parallel_compiler']

compiler/rustc/Cargo.toml

@@ -34,7 +34,7 @@
 
 fn main() {
     // See the comment at the top of this file for an explanation of this.
-    #[cfg(feature = "jemalloc-sys")]
+    #[cfg(feature = "jemalloc")]
     {
         use std::os::raw::{c_int, c_void};
 

compiler/rustc/src/main.rs

@@ -21,10 +21,10 @@ default = ["nightly", "randomize"]
 # rust-analyzer depends on this crate and we therefore require it to built on a stable toolchain
 # without depending on rustc_data_structures, rustc_macros and rustc_serialize
 nightly = [
-    "rustc_data_structures",
+    "dep:rustc_data_structures",
+    "dep:rustc_macros",
+    "dep:rustc_serialize",
     "rustc_index/nightly",
-    "rustc_macros",
-    "rustc_serialize",
 ]
-randomize = ["rand", "rand_xoshiro", "nightly"]
+randomize = ["dep:rand", "dep:rand_xoshiro", "nightly"]
 # tidy-alphabetical-end

compiler/rustc_abi/Cargo.toml

@@ -186,7 +186,7 @@ pub trait LayoutCalculator {
         let (present_first, present_second) = {
             let mut present_variants = variants
                 .iter_enumerated()
-                .filter_map(|(i, v)| if absent(v) { None } else { Some(i) });
+                .filter_map(|(i, v)| if !repr.c() && absent(v) { None } else { Some(i) });
             (present_variants.next(), present_variants.next())
         };
         let present_first = match present_first {
@@ -621,7 +621,7 @@ where
     let discr_type = repr.discr_type();
     let bits = Integer::from_attr(dl, discr_type).size().bits();
     for (i, mut val) in discriminants {
-        if variants[i].iter().any(|f| f.abi.is_uninhabited()) {
+        if !repr.c() && variants[i].iter().any(|f| f.abi.is_uninhabited()) {
             continue;
         }
         if discr_type.is_signed() {

compiler/rustc_abi/src/layout.rs

@@ -1,7 +1,9 @@
-#![cfg_attr(feature = "nightly", feature(step_trait))]
+// tidy-alphabetical-start
 #![cfg_attr(feature = "nightly", allow(internal_features))]
 #![cfg_attr(feature = "nightly", doc(rust_logo))]
 #![cfg_attr(feature = "nightly", feature(rustdoc_internals))]
+#![cfg_attr(feature = "nightly", feature(step_trait))]
+// tidy-alphabetical-end
 
 use std::fmt;
 use std::num::{NonZeroUsize, ParseIntError};
@@ -425,11 +427,13 @@ pub struct Size {
     raw: u64,
 }
 
-// Safety: Ord is implement as just comparing numerical values and numerical values
-// are not changed by (de-)serialization.
 #[cfg(feature = "nightly")]
-unsafe impl StableOrd for Size {
+impl StableOrd for Size {
     const CAN_USE_UNSTABLE_SORT: bool = true;
+
+    // `Ord` is implemented as just comparing numerical values and numerical values
+    // are not changed by (de-)serialization.
+    const THIS_IMPLEMENTATION_HAS_BEEN_TRIPLE_CHECKED: () = ();
 }
 
 // This is debug-printed a lot in larger structs, don't waste too much space there
@@ -623,7 +627,7 @@ impl Step for Size {
 
     #[inline]
     unsafe fn forward_unchecked(start: Self, count: usize) -> Self {
-        Self::from_bytes(u64::forward_unchecked(start.bytes(), count))
+        Self::from_bytes(unsafe { u64::forward_unchecked(start.bytes(), count) })
     }
 
     #[inline]
@@ -638,7 +642,7 @@ impl Step for Size {
 
     #[inline]
     unsafe fn backward_unchecked(start: Self, count: usize) -> Self {
-        Self::from_bytes(u64::backward_unchecked(start.bytes(), count))
+        Self::from_bytes(unsafe { u64::backward_unchecked(start.bytes(), count) })
     }
 }
 
@@ -1425,7 +1429,7 @@ pub enum Variants<FieldIdx: Idx, VariantIdx: Idx> {
     /// Single enum variants, structs/tuples, unions, and all non-ADTs.
     Single { index: VariantIdx },
 
-    /// Enum-likes with more than one inhabited variant: each variant comes with
+    /// Enum-likes with more than one variant: each variant comes with
     /// a *discriminant* (usually the same as the variant index but the user can
     /// assign explicit discriminant values). That discriminant is encoded
     /// as a *tag* on the machine. The layout of each variant is

compiler/rustc_abi/src/lib.rs

@@ -7,23 +7,25 @@
 //!
 //! This crate implements several kinds of arena.
 
+// tidy-alphabetical-start
+#![allow(clippy::mut_from_ref)] // Arena allocators are one place where this pattern is fine.
+#![allow(internal_features)]
+#![cfg_attr(test, feature(test))]
+#![deny(unsafe_op_in_unsafe_fn)]
 #![doc(
     html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/",
     test(no_crate_inject, attr(deny(warnings)))
 )]
 #![doc(rust_logo)]
-#![feature(rustdoc_internals)]
 #![feature(core_intrinsics)]
+#![feature(decl_macro)]
 #![feature(dropck_eyepatch)]
-#![feature(new_uninit)]
 #![feature(maybe_uninit_slice)]
-#![feature(decl_macro)]
+#![feature(new_uninit)]
 #![feature(rustc_attrs)]
-#![cfg_attr(test, feature(test))]
+#![feature(rustdoc_internals)]
 #![feature(strict_provenance)]
-#![deny(unsafe_op_in_unsafe_fn)]
-#![allow(internal_features)]
-#![allow(clippy::mut_from_ref)] // Arena allocators are one of the places where this pattern is fine.
+// tidy-alphabetical-end
 
 use smallvec::SmallVec;