Auto merge of rust-lang#120304 - fmease:rollup-h8gaxdp, r=fmease

Rollup of 8 pull requests

Successful merges:

 - rust-lang#119305 (Add `AsyncFn` family of traits)
 - rust-lang#119389 (Provide more context on recursive `impl` evaluation overflow)
 - rust-lang#120062 (llvm: change data layout bug to an error and make it trigger more)
 - rust-lang#120099 (linker: Refactor library linking methods in `trait Linker`)
 - rust-lang#120201 (Bump some deps with syn 1.0 dependencies)
 - rust-lang#120230 (Assert that a single scope is passed to `for_scope`)
 - rust-lang#120278 (Remove --fatal-warnings on wasm targets)
 - rust-lang#120292 (coverage: Dismantle `Instrumentor` and flatten span refinement)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Cargo.lock

@@ -373,9 +373,9 @@ dependencies = [
 
 [[package]]
 name = "byteorder"
-version = "1.4.3"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 
 [[package]]
 name = "bytes"
@@ -2587,9 +2587,9 @@ checksum = "830b246a0e5f20af87141b25c173cd1b609bd7779a4617d6ec582abaf90870f3"
 
 [[package]]
 name = "object"
-version = "0.32.1"
+version = "0.32.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9cf5f9dd3933bd50a9e1f149ec995f39ae2c496d31fd772c1fd45ebc27e902b0"
+checksum = "a6a622008b6e321afc04970976f62ee297fdbaa6f95318ca343e3eebb9648441"
 dependencies = [
  "compiler_builtins",
  "crc32fast",
@@ -4788,12 +4788,12 @@ checksum = "4f3208ce4d8448b3f3e7d168a73f5e0c43a61e32930de3bceeccedb388b6bf06"
 
 [[package]]
 name = "ruzstd"
-version = "0.4.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac3ffab8f9715a0d455df4bbb9d21e91135aab3cd3ca187af0cd0c3c3f868fdc"
+checksum = "58c4eb8a81997cf040a091d1f7e1938aeab6749d3a0dfa73af43cdc32393483d"
 dependencies = [
  "byteorder",
- "thiserror-core",
+ "derive_more",
  "twox-hash",
 ]
 
@@ -5356,26 +5356,6 @@ dependencies = [
  "thiserror-impl",
 ]
 
-[[package]]
-name = "thiserror-core"
-version = "1.0.38"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d97345f6437bb2004cd58819d8a9ef8e36cdd7661c2abc4bbde0a7c40d9f497"
-dependencies = [
- "thiserror-core-impl",
-]
-
-[[package]]
-name = "thiserror-core-impl"
-version = "1.0.38"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10ac1c5050e43014d16b2f94d0d2ce79e65ffdd8b38d8048f9c8f6a8a6da62ac"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 1.0.109",
-]
-
 [[package]]
 name = "thiserror-impl"
 version = "1.0.47"
@@ -5748,28 +5728,28 @@ dependencies = [
 
 [[package]]
 name = "unic-langid"
-version = "0.9.1"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "398f9ad7239db44fd0f80fe068d12ff22d78354080332a5077dc6f52f14dcf2f"
+checksum = "238722e6d794ed130f91f4ea33e01fcff4f188d92337a21297892521c72df516"
 dependencies = [
  "unic-langid-impl",
  "unic-langid-macros",
 ]
 
 [[package]]
 name = "unic-langid-impl"
-version = "0.9.1"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e35bfd2f2b8796545b55d7d3fd3e89a0613f68a0d1c8bc28cb7ff96b411a35ff"
+checksum = "4bd55a2063fdea4ef1f8633243a7b0524cbeef1905ae04c31a1c9b9775c55bc6"
 dependencies = [
  "tinystr",
 ]
 
 [[package]]
 name = "unic-langid-macros"
-version = "0.9.1"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "055e618bf694161ffff0466d95cef3e1a5edc59f6ba1888e97801f2b4ebdc4fe"
+checksum = "5c854cefb82ff2816410ce606acbad1b3af065140907b29be9229040752b83ec"
 dependencies = [
  "proc-macro-hack",
  "tinystr",
@@ -5779,13 +5759,13 @@ dependencies = [
 
 [[package]]
 name = "unic-langid-macros-impl"
-version = "0.9.1"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f5cdec05b907f4e2f6843f4354f4ce6a5bebe1a56df320a49134944477ce4d8"
+checksum = "fea2a4c80deb4fb3ca51f66b5e2dd91e3642bbce52234bcf22e41668281208e4"
 dependencies = [
  "proc-macro-hack",
  "quote",
- "syn 1.0.109",
+ "syn 2.0.32",
  "unic-langid-impl",
 ]
 

compiler/rustc_codegen_llvm/messages.ftl

@@ -39,6 +39,9 @@ codegen_llvm_lto_dylib = lto cannot be used for `dylib` crate type without `-Zdy
 
 codegen_llvm_lto_proc_macro = lto cannot be used for `proc-macro` crate type without `-Zdylib-lto`
 
+codegen_llvm_mismatch_data_layout =
+    data-layout for target `{$rustc_target}`, `{$rustc_layout}`, differs from LLVM target's `{$llvm_target}` default layout, `{$llvm_layout}`
+
 codegen_llvm_missing_features =
     add the missing features in a `target_feature` attribute
 

compiler/rustc_codegen_llvm/src/context.rs

@@ -34,6 +34,7 @@ use rustc_target::spec::{HasTargetSpec, RelocModel, Target, TlsModel};
 use smallvec::SmallVec;
 
 use libc::c_uint;
+use std::borrow::Borrow;
 use std::cell::{Cell, RefCell};
 use std::ffi::CStr;
 use std::str;
@@ -155,42 +156,21 @@ pub unsafe fn create_module<'ll>(
     }
 
     // Ensure the data-layout values hardcoded remain the defaults.
-    if sess.target.is_builtin {
-        // tm is disposed by its drop impl
+    {
         let tm = crate::back::write::create_informational_target_machine(tcx.sess);
         llvm::LLVMRustSetDataLayoutFromTargetMachine(llmod, &tm);
 
         let llvm_data_layout = llvm::LLVMGetDataLayoutStr(llmod);
         let llvm_data_layout = str::from_utf8(CStr::from_ptr(llvm_data_layout).to_bytes())
             .expect("got a non-UTF8 data-layout from LLVM");
 
-        // Unfortunately LLVM target specs change over time, and right now we
-        // don't have proper support to work with any more than one
-        // `data_layout` than the one that is in the rust-lang/rust repo. If
-        // this compiler is configured against a custom LLVM, we may have a
-        // differing data layout, even though we should update our own to use
-        // that one.
-        //
-        // As an interim hack, if CFG_LLVM_ROOT is not an empty string then we
-        // disable this check entirely as we may be configured with something
-        // that has a different target layout.
-        //
-        // Unsure if this will actually cause breakage when rustc is configured
-        // as such.
-        //
-        // FIXME(#34960)
-        let cfg_llvm_root = option_env!("CFG_LLVM_ROOT").unwrap_or("");
-        let custom_llvm_used = !cfg_llvm_root.trim().is_empty();
-
-        if !custom_llvm_used && target_data_layout != llvm_data_layout {
-            bug!(
-                "data-layout for target `{rustc_target}`, `{rustc_layout}`, \
-                  differs from LLVM target's `{llvm_target}` default layout, `{llvm_layout}`",
-                rustc_target = sess.opts.target_triple,
-                rustc_layout = target_data_layout,
-                llvm_target = sess.target.llvm_target,
-                llvm_layout = llvm_data_layout
-            );
+        if target_data_layout != llvm_data_layout {
+            tcx.dcx().emit_err(crate::errors::MismatchedDataLayout {
+                rustc_target: sess.opts.target_triple.to_string().as_str(),
+                rustc_layout: target_data_layout.as_str(),
+                llvm_target: sess.target.llvm_target.borrow(),
+                llvm_layout: llvm_data_layout,
+            });
         }
     }
 

compiler/rustc_codegen_llvm/src/errors.rs

@@ -244,3 +244,12 @@ pub(crate) struct CopyBitcode {
 pub struct UnknownCompression {
     pub algorithm: &'static str,
 }
+
+#[derive(Diagnostic)]
+#[diag(codegen_llvm_mismatch_data_layout)]
+pub struct MismatchedDataLayout<'a> {
+    pub rustc_target: &'a str,
+    pub rustc_layout: &'a str,
+    pub llvm_target: &'a str,
+    pub llvm_layout: &'a str,
+}

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -52,6 +52,15 @@ use std::path::{Path, PathBuf};
 use std::process::{ExitStatus, Output, Stdio};
 use std::{env, fmt, fs, io, mem, str};
 
+#[derive(Default)]
+pub struct SearchPaths(OnceCell<Vec<PathBuf>>);
+
+impl SearchPaths {
+    pub(super) fn get(&self, sess: &Session) -> &[PathBuf] {
+        self.0.get_or_init(|| archive_search_paths(sess))
+    }
+}
+
 pub fn ensure_removed(dcx: &DiagCtxt, path: &Path) {
     if let Err(e) = fs::remove_file(path) {
         if e.kind() != io::ErrorKind::NotFound {
@@ -1265,15 +1274,15 @@ fn link_sanitizer_runtime(
         let path = find_sanitizer_runtime(sess, &filename);
         let rpath = path.to_str().expect("non-utf8 component in path");
         linker.args(&["-Wl,-rpath", "-Xlinker", rpath]);
-        linker.link_dylib(&filename, false, true);
+        linker.link_dylib_by_name(&filename, false, true);
     } else if sess.target.is_like_msvc && flavor == LinkerFlavor::Msvc(Lld::No) && name == "asan" {
         // MSVC provides the `/INFERASANLIBS` argument to automatically find the
         // compatible ASAN library.
         linker.arg("/INFERASANLIBS");
     } else {
         let filename = format!("librustc{channel}_rt.{name}.a");
         let path = find_sanitizer_runtime(sess, &filename).join(&filename);
-        linker.link_whole_rlib(&path);
+        linker.link_staticlib_by_path(&path, true);
     }
 }
 
@@ -2445,7 +2454,7 @@ fn add_native_libs_from_crate(
     archive_builder_builder: &dyn ArchiveBuilderBuilder,
     codegen_results: &CodegenResults,
     tmpdir: &Path,
-    search_paths: &OnceCell<Vec<PathBuf>>,
+    search_paths: &SearchPaths,
     bundled_libs: &FxHashSet<Symbol>,
     cnum: CrateNum,
     link_static: bool,
@@ -2505,46 +2514,34 @@ fn add_native_libs_from_crate(
                         if let Some(filename) = lib.filename {
                             // If rlib contains native libs as archives, they are unpacked to tmpdir.
                             let path = tmpdir.join(filename.as_str());
-                            if whole_archive {
-                                cmd.link_whole_rlib(&path);
-                            } else {
-                                cmd.link_rlib(&path);
-                            }
+                            cmd.link_staticlib_by_path(&path, whole_archive);
                         }
                     } else {
-                        if whole_archive {
-                            cmd.link_whole_staticlib(
-                                name,
-                                verbatim,
-                                search_paths.get_or_init(|| archive_search_paths(sess)),
-                            );
-                        } else {
-                            cmd.link_staticlib(name, verbatim)
-                        }
+                        cmd.link_staticlib_by_name(name, verbatim, whole_archive, search_paths);
                     }
                 }
             }
             NativeLibKind::Dylib { as_needed } => {
                 if link_dynamic {
-                    cmd.link_dylib(name, verbatim, as_needed.unwrap_or(true))
+                    cmd.link_dylib_by_name(name, verbatim, as_needed.unwrap_or(true))
                 }
             }
             NativeLibKind::Unspecified => {
                 // If we are generating a static binary, prefer static library when the
                 // link kind is unspecified.
                 if !link_output_kind.can_link_dylib() && !sess.target.crt_static_allows_dylibs {
                     if link_static {
-                        cmd.link_staticlib(name, verbatim)
+                        cmd.link_staticlib_by_name(name, verbatim, false, search_paths);
                     }
                 } else {
                     if link_dynamic {
-                        cmd.link_dylib(name, verbatim, true);
+                        cmd.link_dylib_by_name(name, verbatim, true);
                     }
                 }
             }
             NativeLibKind::Framework { as_needed } => {
                 if link_dynamic {
-                    cmd.link_framework(name, as_needed.unwrap_or(true))
+                    cmd.link_framework_by_name(name, verbatim, as_needed.unwrap_or(true))
                 }
             }
             NativeLibKind::RawDylib => {
@@ -2581,7 +2578,7 @@ fn add_local_native_libraries(
         }
     }
 
-    let search_paths = OnceCell::new();
+    let search_paths = SearchPaths::default();
     // All static and dynamic native library dependencies are linked to the local crate.
     let link_static = true;
     let link_dynamic = true;
@@ -2623,7 +2620,7 @@ fn add_upstream_rust_crates<'a>(
         .find(|(ty, _)| *ty == crate_type)
         .expect("failed to find crate type in dependency format list");
 
-    let search_paths = OnceCell::new();
+    let search_paths = SearchPaths::default();
     for &cnum in &codegen_results.crate_info.used_crates {
         // We may not pass all crates through to the linker. Some crates may appear statically in
         // an existing dylib, meaning we'll pick up all the symbols from the dylib.
@@ -2698,7 +2695,7 @@ fn add_upstream_native_libraries(
     tmpdir: &Path,
     link_output_kind: LinkOutputKind,
 ) {
-    let search_path = OnceCell::new();
+    let search_paths = SearchPaths::default();
     for &cnum in &codegen_results.crate_info.used_crates {
         // Static libraries are not linked here, they are linked in `add_upstream_rust_crates`.
         // FIXME: Merge this function to `add_upstream_rust_crates` so that all native libraries
@@ -2720,7 +2717,7 @@ fn add_upstream_native_libraries(
             archive_builder_builder,
             codegen_results,
             tmpdir,
-            &search_path,
+            &search_paths,
             &Default::default(),
             cnum,
             link_static,
@@ -2791,7 +2788,7 @@ fn add_static_crate<'a>(
         } else {
             fix_windows_verbatim_for_gcc(path)
         };
-        cmd.link_rlib(&rlib_path);
+        cmd.link_staticlib_by_path(&rlib_path, false);
     };
 
     if !are_upstream_rust_objects_already_included(sess)
@@ -2859,13 +2856,24 @@ fn add_dynamic_crate(cmd: &mut dyn Linker, sess: &Session, cratepath: &Path) {
     // Just need to tell the linker about where the library lives and
     // what its name is
     let parent = cratepath.parent();
+    // When producing a dll, the MSVC linker may not actually emit a
+    // `foo.lib` file if the dll doesn't actually export any symbols, so we
+    // check to see if the file is there and just omit linking to it if it's
+    // not present.
+    if sess.target.is_like_msvc && !cratepath.with_extension("dll.lib").exists() {
+        return;
+    }
     if let Some(dir) = parent {
         cmd.include_path(&rehome_sysroot_lib_dir(sess, dir));
     }
-    let stem = cratepath.file_stem().unwrap().to_str().unwrap();
+    // "<dir>/name.dll -> name.dll" on windows-msvc
+    // "<dir>/name.dll -> name" on windows-gnu
+    // "<dir>/libname.<ext> -> name" elsewhere
+    let stem = if sess.target.is_like_msvc { cratepath.file_name() } else { cratepath.file_stem() };
+    let stem = stem.unwrap().to_str().unwrap();
     // Convert library file-stem into a cc -l argument.
     let prefix = if stem.starts_with("lib") && !sess.target.is_like_windows { 3 } else { 0 };
-    cmd.link_rust_dylib(&stem[prefix..], parent.unwrap_or_else(|| Path::new("")));
+    cmd.link_dylib_by_name(&stem[prefix..], false, true);
 }
 
 fn relevant_lib(sess: &Session, lib: &NativeLib) -> bool {