Merge branch 'master' into remove-lib-feature

Author: nilotpal-n7

.editorconfig

@@ -8,20 +8,23 @@ root = true
 end_of_line = lf
 charset = utf-8
 insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 4
 
 # some tests need trailing whitespace in output snapshots
-[!tests/]
-trim_trailing_whitespace = true
+[tests/**]
+trim_trailing_whitespace = false
 # for actual source code files of test, we still don't want trailing whitespace
 [tests/**.{rs,js}]
 trim_trailing_whitespace = true
 # these specific source files need to have trailing whitespace.
 [tests/ui/{frontmatter/frontmatter-whitespace-3.rs,parser/shebang/shebang-space.rs}]
 trim_trailing_whitespace = false
 
-[!src/llvm-project]
-indent_style = space
-indent_size = 4
+[src/llvm-project]
+indent_style = unset
+indent_size = unset
 
 [*.rs]
 max_line_length = 100

Cargo.lock

@@ -158,11 +158,11 @@ checksum = "b0674a1ddeecb70197781e945de4b3b8ffb61fa939a5597bcf48503737663100"
 
 [[package]]
 name = "ar_archive_writer"
-version = "0.4.2"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "01667f6f40216b9a0b2945e05fed5f1ad0ab6470e69cb9378001e37b1c0668e4"
+checksum = "7eb93bbb63b9c227414f6eb3a0adfddca591a8ce1e9b60661bb08969b87e340b"
 dependencies = [
- "object 0.36.7",
+ "object 0.37.3",
 ]
 
 [[package]]
@@ -336,7 +336,7 @@ dependencies = [
  "curl",
  "indexmap",
  "serde",
- "toml 0.7.8",
+ "toml 0.8.23",
 ]
 
 [[package]]
@@ -2167,6 +2167,7 @@ version = "0.1.0"
 dependencies = [
  "html5ever",
  "regex",
+ "urlencoding",
 ]
 
 [[package]]
@@ -3204,9 +3205,9 @@ dependencies = [
 
 [[package]]
 name = "rustc-build-sysroot"
-version = "0.5.9"
+version = "0.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fdb13874a0e55baf4ac3d49d38206aecb31a55b75d6c4d04fd850b53942c8cc8"
+checksum = "3b881c015c729b43105bbd3702a9bdecee28fafaa21126d1d62e454ec011a4b7"
 dependencies = [
  "anyhow",
  "rustc_version",
@@ -3248,6 +3249,7 @@ dependencies = [
  "rustc_driver_impl",
  "rustc_public",
  "rustc_public_bridge",
+ "rustc_windows_rc",
  "tikv-jemalloc-sys",
 ]
 
@@ -3623,6 +3625,7 @@ name = "rustc_driver"
 version = "0.0.0"
 dependencies = [
  "rustc_driver_impl",
+ "rustc_windows_rc",
 ]
 
 [[package]]
@@ -4022,6 +4025,7 @@ dependencies = [
 name = "rustc_lint"
 version = "0.0.0"
 dependencies = [
+ "bitflags",
  "rustc_abi",
  "rustc_ast",
  "rustc_ast_pretty",
@@ -4072,7 +4076,6 @@ name = "rustc_log"
 version = "0.0.0"
 dependencies = [
  "tracing",
- "tracing-core",
  "tracing-subscriber",
  "tracing-tree",
 ]
@@ -4409,7 +4412,6 @@ dependencies = [
  "rustc_middle",
  "rustc_query_system",
  "rustc_serialize",
- "rustc_session",
  "rustc_span",
  "tracing",
 ]
@@ -4681,6 +4683,7 @@ dependencies = [
 name = "rustc_type_ir"
 version = "0.0.0"
 dependencies = [
+ "arrayvec",
  "bitflags",
  "derive-where",
  "ena",
@@ -4718,6 +4721,13 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rustc_windows_rc"
+version = "0.0.0"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "rustdoc"
 version = "0.0.0"
@@ -5152,9 +5162,9 @@ dependencies = [
 
 [[package]]
 name = "stringdex"
-version = "0.0.1-alpha4"
+version = "0.0.1-alpha9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2841fd43df5b1ff1b042e167068a1fe9b163dc93041eae56ab2296859013a9a0"
+checksum = "7081029913fd7d591c0112182aba8c98ae886b4f12edb208130496cd17dc3c15"
 dependencies = [
  "stacker",
 ]
@@ -5518,11 +5528,10 @@ checksum = "5d99f8c9a7727884afe522e9bd5edbfc91a3312b36a77b5fb8926e4c31a41801"
 
 [[package]]
 name = "tracing"
-version = "0.1.37"
+version = "0.1.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ce8c33a8d48bd45d624a6e523445fd21ec13d3653cd51f681abf67418f54eb8"
+checksum = "784e0ac535deb450455cbfa28a6f0df145ea1bb7ae51b821cf5e7927fdcfbdd0"
 dependencies = [
- "cfg-if",
  "pin-project-lite",
  "tracing-attributes",
  "tracing-core",
@@ -5541,9 +5550,9 @@ dependencies = [
 
 [[package]]
 name = "tracing-core"
-version = "0.1.30"
+version = "0.1.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "24eb03ba0eab1fd845050058ce5e616558e8f8d8fca633e6b163fe25c797213a"
+checksum = "b9d12581f227e93f094d3af2ae690a574abb8a2b9b7a96e7cfe9647b2b617678"
 dependencies = [
  "once_cell",
  "valuable",
@@ -5825,6 +5834,12 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "urlencoding"
+version = "2.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "daf8dba3b7eb870caf1ddeed7bc9d2a049f3cfdfae7cb521b087cc33ae4c49da"
+
 [[package]]
 name = "utf-8"
 version = "0.7.6"

Cargo.toml

@@ -59,33 +59,6 @@ exclude = [
   "obj",
 ]
 
-[workspace.dependencies]
-# tidy-alphabetical-start
-bitflags = "2.9.3"
-derive-where = "1.6.0"
-either = "1.15.0"
-indexmap = "2.10.0"
-itertools = "0.12.1"
-# FIXME: Remove this pin once this rustix issue is resolved
-# https://github.com/bytecodealliance/rustix/issues/1496
-libc = "=0.2.174"
-measureme = "12.0.3"
-memchr = "2.7.5"
-odht = { version = "0.3.1", features = ["nightly"] }
-polonius-engine = "0.13.0"
-proc-macro2 = "1.0.101"
-quote = "1.0.40"
-rustc-demangle = "0.1.26"
-rustc-hash = "2.1.1"
-rustc-literal-escaper = "0.0.5"
-rustc_apfloat = "0.2.3"
-scoped-tls = "1.0.1"
-serde_json = "1.0.142"
-tempfile = "3.20.0"
-thin-vec = "0.2.14"
-tracing = "0.1.37"
-# tidy-alphabetical-end
-
 [profile.release.package.rustc_thread_pool]
 # The rustc fork of Rayon has deadlock detection code which intermittently
 # causes overflows in the CI (see https://github.com/rust-lang/rust/issues/90227)

bootstrap.example.toml

@@ -856,6 +856,9 @@
 # as libstd features, this option can also be used to configure features such as optimize_for_size.
 #rust.std-features = ["panic_unwind"]
 
+# Trigger a `DebugBreak` after an internal compiler error during bootstrap on Windows
+#rust.break-on-ice = true
+
 # =============================================================================
 # Distribution options
 #

compiler/rustc/Cargo.toml

@@ -33,3 +33,8 @@ llvm = ['rustc_driver_impl/llvm']
 max_level_info = ['rustc_driver_impl/max_level_info']
 rustc_randomized_layouts = ['rustc_driver_impl/rustc_randomized_layouts']
 # tidy-alphabetical-end
+
+[build-dependencies]
+# tidy-alphabetical-start
+rustc_windows_rc = { path = "../rustc_windows_rc" }
+# tidy-alphabetical-end

compiler/rustc/build.rs

@@ -1,4 +1,6 @@
-use std::env;
+use std::{env, path};
+
+use rustc_windows_rc::{VersionInfoFileType, compile_windows_resource_file};
 
 fn main() {
     let target_os = env::var("CARGO_CFG_TARGET_OS");
@@ -13,6 +15,18 @@ fn main() {
 
 // Add a manifest file to rustc.exe.
 fn set_windows_exe_options() {
+    set_windows_resource();
+    set_windows_manifest();
+}
+
+fn set_windows_resource() {
+    let stem = path::PathBuf::from("rustc_main_resource");
+    let file_description = "rustc";
+    let res_file = compile_windows_resource_file(&stem, file_description, VersionInfoFileType::App);
+    println!("cargo:rustc-link-arg={}", res_file.display());
+}
+
+fn set_windows_manifest() {
     static WINDOWS_MANIFEST_FILE: &str = "Windows Manifest.xml";
 
     let mut manifest = env::current_dir().unwrap();

compiler/rustc_abi/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-bitflags.workspace = true
+bitflags = "2.4.1"
 rand = { version = "0.9.0", default-features = false, optional = true }
 rand_xoshiro = { version = "0.7.0", optional = true }
 rustc_data_structures = { path = "../rustc_data_structures", optional = true }
@@ -15,7 +15,7 @@ rustc_index = { path = "../rustc_index", default-features = false }
 rustc_macros = { path = "../rustc_macros", optional = true }
 rustc_serialize = { path = "../rustc_serialize", optional = true }
 rustc_span = { path = "../rustc_span", optional = true }
-tracing.workspace = true
+tracing = "0.1"
 # tidy-alphabetical-end
 
 [features]

compiler/rustc_abi/src/extern_abi.rs

@@ -6,6 +6,8 @@ use std::hash::{Hash, Hasher};
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher, StableOrd};
 #[cfg(feature = "nightly")]
 use rustc_macros::{Decodable, Encodable};
+#[cfg(feature = "nightly")]
+use rustc_span::Symbol;
 
 use crate::AbiFromStrErr;
 
@@ -226,6 +228,13 @@ impl StableOrd for ExternAbi {
 #[cfg(feature = "nightly")]
 rustc_error_messages::into_diag_arg_using_display!(ExternAbi);
 
+#[cfg(feature = "nightly")]
+pub enum CVariadicStatus {
+    NotSupported,
+    Stable,
+    Unstable { feature: Symbol },
+}
+
 impl ExternAbi {
     /// An ABI "like Rust"
     ///
@@ -238,23 +247,33 @@ impl ExternAbi {
         matches!(self, Rust | RustCall | RustCold)
     }
 
-    pub fn supports_varargs(self) -> bool {
+    /// Returns whether the ABI supports C variadics. This only controls whether we allow *imports*
+    /// of such functions via `extern` blocks; there's a separate check during AST construction
+    /// guarding *definitions* of variadic functions.
+    #[cfg(feature = "nightly")]
+    pub fn supports_c_variadic(self) -> CVariadicStatus {
         // * C and Cdecl obviously support varargs.
         // * C can be based on Aapcs, SysV64 or Win64, so they must support varargs.
         // * EfiApi is based on Win64 or C, so it also supports it.
+        // * System automatically falls back to C when used with variadics, therefore supports it.
         //
         // * Stdcall does not, because it would be impossible for the callee to clean
         //   up the arguments. (callee doesn't know how many arguments are there)
         // * Same for Fastcall, Vectorcall and Thiscall.
         // * Other calling conventions are related to hardware or the compiler itself.
+        //
+        // All of the supported ones must have a test in `tests/codegen/cffi/c-variadic-ffi.rs`.
         match self {
             Self::C { .. }
             | Self::Cdecl { .. }
             | Self::Aapcs { .. }
             | Self::Win64 { .. }
             | Self::SysV64 { .. }
-            | Self::EfiApi => true,
-            _ => false,
+            | Self::EfiApi => CVariadicStatus::Stable,
+            Self::System { .. } => {
+                CVariadicStatus::Unstable { feature: rustc_span::sym::extern_system_varargs }
+            }
+            _ => CVariadicStatus::NotSupported,
         }
     }
 }

compiler/rustc_abi/src/lib.rs

@@ -63,6 +63,8 @@ mod tests;
 
 pub use callconv::{Heterogeneous, HomogeneousAggregate, Reg, RegKind};
 pub use canon_abi::{ArmCall, CanonAbi, InterruptKind, X86Call};
+#[cfg(feature = "nightly")]
+pub use extern_abi::CVariadicStatus;
 pub use extern_abi::{ExternAbi, all_names};
 #[cfg(feature = "nightly")]
 pub use layout::{FIRST_VARIANT, FieldIdx, Layout, TyAbiInterface, TyAndLayout, VariantIdx};
@@ -315,7 +317,7 @@ pub enum TargetDataLayoutErrors<'a> {
     MissingAlignment { cause: &'a str },
     InvalidAlignment { cause: &'a str, err: AlignFromBytesError },
     InconsistentTargetArchitecture { dl: &'a str, target: &'a str },
-    InconsistentTargetPointerWidth { pointer_size: u64, target: u32 },
+    InconsistentTargetPointerWidth { pointer_size: u64, target: u16 },
     InvalidBitsSize { err: String },
     UnknownPointerSpecification { err: String },
 }

compiler/rustc_ast/Cargo.toml

@@ -5,16 +5,16 @@ edition = "2024"
 
 [dependencies]
 # tidy-alphabetical-start
-bitflags.workspace = true
-memchr.workspace = true
-rustc-literal-escaper.workspace = true
+bitflags = "2.4.1"
+memchr = "2.7.4"
+rustc-literal-escaper = "0.0.5"
 rustc_ast_ir = { path = "../rustc_ast_ir" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_index = { path = "../rustc_index" }
 rustc_macros = { path = "../rustc_macros" }
 rustc_serialize = { path = "../rustc_serialize" }
 rustc_span = { path = "../rustc_span" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-thin-vec.workspace = true
-tracing.workspace = true
+thin-vec = "0.2.12"
+tracing = "0.1"
 # tidy-alphabetical-end