diff --git a/Cargo.lock b/Cargo.lock index c4c96f1569b6..81f19668c24b 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -336,7 +336,7 @@ dependencies = [ "curl", "indexmap", "serde", - "toml 0.7.8", + "toml 0.8.23", ] [[package]] @@ -4022,6 +4022,7 @@ dependencies = [ name = "rustc_lint" version = "0.0.0" dependencies = [ + "bitflags", "rustc_abi", "rustc_ast", "rustc_ast_pretty", @@ -4072,7 +4073,6 @@ name = "rustc_log" version = "0.0.0" dependencies = [ "tracing", - "tracing-core", "tracing-subscriber", "tracing-tree", ] @@ -5541,9 +5541,9 @@ 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", diff --git a/compiler/rustc_borrowck/src/region_infer/opaque_types/mod.rs b/compiler/rustc_borrowck/src/region_infer/opaque_types/mod.rs index 72615cb33b37..95c5366a6c8e 100644 --- a/compiler/rustc_borrowck/src/region_infer/opaque_types/mod.rs +++ b/compiler/rustc_borrowck/src/region_infer/opaque_types/mod.rs @@ -503,7 +503,16 @@ pub(crate) fn apply_computed_concrete_opaque_types<'tcx>( let mut errors = Vec::new(); for &(key, hidden_type) in opaque_types { let Some(expected) = get_concrete_opaque_type(concrete_opaque_types, key.def_id) else { - assert!(tcx.use_typing_mode_borrowck(), "non-defining use in defining scope"); + if !tcx.use_typing_mode_borrowck() { + if let ty::Alias(ty::Opaque, alias_ty) = hidden_type.ty.kind() + && alias_ty.def_id == key.def_id.to_def_id() + && alias_ty.args == key.args + { + continue; + } else { + unreachable!("non-defining use in defining scope"); + } + } errors.push(DeferredOpaqueTypeError::NonDefiningUseInDefiningScope { span: hidden_type.span, opaque_type_key: key, diff --git a/compiler/rustc_codegen_cranelift/scripts/test_rustc_tests.sh b/compiler/rustc_codegen_cranelift/scripts/test_rustc_tests.sh index 52e02c857c7a..62f1cc6a8933 100755 --- a/compiler/rustc_codegen_cranelift/scripts/test_rustc_tests.sh +++ b/compiler/rustc_codegen_cranelift/scripts/test_rustc_tests.sh @@ -121,7 +121,7 @@ rm tests/ui/abi/large-byval-align.rs # exceeds implementation limit of Cranelift # ============================================================ rm -r tests/run-make/remap-path-prefix-dwarf # requires llvm-dwarfdump rm -r tests/run-make/strip # same -rm -r tests/run-make/compiler-builtins # Expects lib/rustlib/src/rust to contains the standard library source +rm -r tests/run-make-cargo/compiler-builtins # Expects lib/rustlib/src/rust to contains the standard library source rm -r tests/run-make/translation # same rm -r tests/run-make/missing-unstable-trait-bound # This disables support for unstable features, but running cg_clif needs some unstable features rm -r tests/run-make/const-trait-stable-toolchain # same @@ -166,5 +166,5 @@ index 073116933bd..c3e4578204d 100644 EOF echo "[TEST] rustc test suite" -./x.py test --stage 0 --test-args=--no-capture tests/{codegen-units,run-make,ui,incremental} +./x.py test --stage 0 --test-args=--no-capture tests/{codegen-units,run-make,run-make-cargo,ui,incremental} popd diff --git a/compiler/rustc_codegen_cranelift/src/driver/aot.rs b/compiler/rustc_codegen_cranelift/src/driver/aot.rs index c3adb5e767e2..7e77781dc2fc 100644 --- a/compiler/rustc_codegen_cranelift/src/driver/aot.rs +++ b/compiler/rustc_codegen_cranelift/src/driver/aot.rs @@ -12,7 +12,9 @@ use cranelift_object::{ObjectBuilder, ObjectModule}; use rustc_codegen_ssa::assert_module_sources::CguReuse; use rustc_codegen_ssa::back::link::ensure_removed; use rustc_codegen_ssa::base::determine_cgu_reuse; -use rustc_codegen_ssa::{CodegenResults, CompiledModule, CrateInfo, errors as ssa_errors}; +use rustc_codegen_ssa::{ + CodegenResults, CompiledModule, CrateInfo, ModuleKind, errors as ssa_errors, +}; use rustc_data_structures::profiling::SelfProfilerRef; use rustc_data_structures::stable_hasher::{HashStable, StableHasher}; use rustc_data_structures::sync::{IntoDynSyncSend, par_map}; @@ -361,6 +363,7 @@ fn emit_cgu( invocation_temp, prof, product.object, + ModuleKind::Regular, name.clone(), producer, )?; @@ -369,6 +372,7 @@ fn emit_cgu( module_regular, module_global_asm: global_asm_object_file.map(|global_asm_object_file| CompiledModule { name: format!("{name}.asm"), + kind: ModuleKind::Regular, object: Some(global_asm_object_file), dwarf_object: None, bytecode: None, @@ -385,6 +389,7 @@ fn emit_module( invocation_temp: Option<&str>, prof: &SelfProfilerRef, mut object: cranelift_object::object::write::Object<'_>, + kind: ModuleKind, name: String, producer_str: &str, ) -> Result { @@ -425,6 +430,7 @@ fn emit_module( Ok(CompiledModule { name, + kind, object: Some(tmp_file), dwarf_object: None, bytecode: None, @@ -479,6 +485,7 @@ fn reuse_workproduct_for_cgu( Ok(ModuleCodegenResult { module_regular: CompiledModule { name: cgu.name().to_string(), + kind: ModuleKind::Regular, object: Some(obj_out_regular), dwarf_object: None, bytecode: None, @@ -488,6 +495,7 @@ fn reuse_workproduct_for_cgu( }, module_global_asm: source_file_global_asm.map(|source_file| CompiledModule { name: cgu.name().to_string(), + kind: ModuleKind::Regular, object: Some(obj_out_global_asm), dwarf_object: None, bytecode: None, @@ -643,6 +651,7 @@ fn emit_allocator_module(tcx: TyCtxt<'_>) -> Option { tcx.sess.invocation_temp.as_deref(), &tcx.sess.prof, product.object, + ModuleKind::Allocator, "allocator_shim".to_owned(), &crate::debuginfo::producer(tcx.sess), ) { diff --git a/compiler/rustc_codegen_gcc/build_system/src/test.rs b/compiler/rustc_codegen_gcc/build_system/src/test.rs index 3dd3fce2eec5..1823aa71f408 100644 --- a/compiler/rustc_codegen_gcc/build_system/src/test.rs +++ b/compiler/rustc_codegen_gcc/build_system/src/test.rs @@ -1083,11 +1083,12 @@ where fn test_rustc(env: &Env, args: &TestArg) -> Result<(), String> { test_rustc_inner(env, args, |_| Ok(false), false, "run-make")?; + test_rustc_inner(env, args, |_| Ok(false), false, "run-make-cargo")?; test_rustc_inner(env, args, |_| Ok(false), false, "ui") } fn test_failing_rustc(env: &Env, args: &TestArg) -> Result<(), String> { - let result1 = test_rustc_inner( + let run_make_result = test_rustc_inner( env, args, retain_files_callback("tests/failing-run-make-tests.txt", "run-make"), @@ -1095,7 +1096,15 @@ fn test_failing_rustc(env: &Env, args: &TestArg) -> Result<(), String> { "run-make", ); - let result2 = test_rustc_inner( + let run_make_cargo_result = test_rustc_inner( + env, + args, + retain_files_callback("tests/failing-run-make-tests.txt", "run-make-cargo"), + false, + "run-make", + ); + + let ui_result = test_rustc_inner( env, args, retain_files_callback("tests/failing-ui-tests.txt", "ui"), @@ -1103,7 +1112,7 @@ fn test_failing_rustc(env: &Env, args: &TestArg) -> Result<(), String> { "ui", ); - result1.and(result2) + run_make_result.and(run_make_cargo_result).and(ui_result) } fn test_successful_rustc(env: &Env, args: &TestArg) -> Result<(), String> { @@ -1120,6 +1129,13 @@ fn test_successful_rustc(env: &Env, args: &TestArg) -> Result<(), String> { remove_files_callback("tests/failing-run-make-tests.txt", "run-make"), false, "run-make", + )?; + test_rustc_inner( + env, + args, + remove_files_callback("tests/failing-run-make-tests.txt", "run-make-cargo"), + false, + "run-make-cargo", ) } diff --git a/compiler/rustc_codegen_gcc/src/back/lto.rs b/compiler/rustc_codegen_gcc/src/back/lto.rs index 9d8ce2383f2b..d29bba2570f6 100644 --- a/compiler/rustc_codegen_gcc/src/back/lto.rs +++ b/compiler/rustc_codegen_gcc/src/back/lto.rs @@ -305,12 +305,9 @@ pub(crate) fn run_thin( ) } -pub(crate) fn prepare_thin( - module: ModuleCodegen, - _emit_summary: bool, -) -> (String, ThinBuffer) { +pub(crate) fn prepare_thin(module: ModuleCodegen) -> (String, ThinBuffer) { let name = module.name; - //let buffer = ThinBuffer::new(module.module_llvm.context, true, emit_summary); + //let buffer = ThinBuffer::new(module.module_llvm.context, true); let buffer = ThinBuffer::new(&module.module_llvm.context); (name, buffer) } @@ -650,10 +647,6 @@ impl ThinBufferMethods for ThinBuffer { fn data(&self) -> &[u8] { &[] } - - fn thin_link_data(&self) -> &[u8] { - unimplemented!(); - } } pub struct ThinData; //(Arc); diff --git a/compiler/rustc_codegen_gcc/src/lib.rs b/compiler/rustc_codegen_gcc/src/lib.rs index 2d7df79ba95f..f76f933cad4a 100644 --- a/compiler/rustc_codegen_gcc/src/lib.rs +++ b/compiler/rustc_codegen_gcc/src/lib.rs @@ -408,11 +408,8 @@ impl WriteBackendMethods for GccCodegenBackend { back::write::codegen(cgcx, module, config) } - fn prepare_thin( - module: ModuleCodegen, - emit_summary: bool, - ) -> (String, Self::ThinBuffer) { - back::lto::prepare_thin(module, emit_summary) + fn prepare_thin(module: ModuleCodegen) -> (String, Self::ThinBuffer) { + back::lto::prepare_thin(module) } fn serialize_module(_module: ModuleCodegen) -> (String, Self::ModuleBuffer) { diff --git a/compiler/rustc_codegen_llvm/src/attributes.rs b/compiler/rustc_codegen_llvm/src/attributes.rs index 9f2d37d39d87..573c51a95398 100644 --- a/compiler/rustc_codegen_llvm/src/attributes.rs +++ b/compiler/rustc_codegen_llvm/src/attributes.rs @@ -296,6 +296,19 @@ pub(crate) fn tune_cpu_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribu .map(|tune_cpu| llvm::CreateAttrStringValue(cx.llcx, "tune-cpu", tune_cpu)) } +/// Get the `target-features` LLVM attribute. +pub(crate) fn target_features_attr<'ll>( + cx: &CodegenCx<'ll, '_>, + function_features: Vec, +) -> Option<&'ll Attribute> { + let global_features = cx.tcx.global_backend_features(()).iter().map(String::as_str); + let function_features = function_features.iter().map(String::as_str); + let target_features = + global_features.chain(function_features).intersperse(",").collect::(); + (!target_features.is_empty()) + .then(|| llvm::CreateAttrStringValue(cx.llcx, "target-features", &target_features)) +} + /// Get the `NonLazyBind` LLVM attribute, /// if the codegen options allow skipping the PLT. pub(crate) fn non_lazy_bind_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> { @@ -523,14 +536,7 @@ pub(crate) fn llfn_attrs_from_instance<'ll, 'tcx>( } } - let global_features = cx.tcx.global_backend_features(()).iter().map(|s| s.as_str()); - let function_features = function_features.iter().map(|s| s.as_str()); - let target_features: String = - global_features.chain(function_features).intersperse(",").collect(); - - if !target_features.is_empty() { - to_add.push(llvm::CreateAttrStringValue(cx.llcx, "target-features", &target_features)); - } + to_add.extend(target_features_attr(cx, function_features)); attributes::apply_to_llfn(llfn, Function, &to_add); } diff --git a/compiler/rustc_codegen_llvm/src/back/lto.rs b/compiler/rustc_codegen_llvm/src/back/lto.rs index 326b876e7e68..f571716d9dd9 100644 --- a/compiler/rustc_codegen_llvm/src/back/lto.rs +++ b/compiler/rustc_codegen_llvm/src/back/lto.rs @@ -11,7 +11,7 @@ use object::{Object, ObjectSection}; use rustc_codegen_ssa::back::lto::{SerializedModule, ThinModule, ThinShared}; use rustc_codegen_ssa::back::write::{CodegenContext, FatLtoInput}; use rustc_codegen_ssa::traits::*; -use rustc_codegen_ssa::{ModuleCodegen, looks_like_rust_object_file}; +use rustc_codegen_ssa::{ModuleCodegen, ModuleKind, looks_like_rust_object_file}; use rustc_data_structures::fx::FxHashMap; use rustc_data_structures::memmap::Mmap; use rustc_errors::DiagCtxtHandle; @@ -185,12 +185,9 @@ pub(crate) fn run_thin( thin_lto(cgcx, dcx, modules, upstream_modules, cached_modules, &symbols_below_threshold) } -pub(crate) fn prepare_thin( - module: ModuleCodegen, - emit_summary: bool, -) -> (String, ThinBuffer) { +pub(crate) fn prepare_thin(module: ModuleCodegen) -> (String, ThinBuffer) { let name = module.name; - let buffer = ThinBuffer::new(module.module_llvm.llmod(), true, emit_summary); + let buffer = ThinBuffer::new(module.module_llvm.llmod(), true); (name, buffer) } @@ -225,9 +222,15 @@ fn fat_lto( // All the other modules will be serialized and reparsed into the new // context, so this hopefully avoids serializing and parsing the largest // codegen unit. + // + // Additionally use a regular module as the base here to ensure that various + // file copy operations in the backend work correctly. The only other kind + // of module here should be an allocator one, and if your crate is smaller + // than the allocator module then the size doesn't really matter anyway. let costliest_module = in_memory .iter() .enumerate() + .filter(|&(_, module)| module.kind == ModuleKind::Regular) .map(|(i, module)| { let cost = unsafe { llvm::LLVMRustModuleCost(module.module_llvm.llmod()) }; (cost, i) @@ -681,9 +684,9 @@ unsafe impl Send for ThinBuffer {} unsafe impl Sync for ThinBuffer {} impl ThinBuffer { - pub(crate) fn new(m: &llvm::Module, is_thin: bool, emit_summary: bool) -> ThinBuffer { + pub(crate) fn new(m: &llvm::Module, is_thin: bool) -> ThinBuffer { unsafe { - let buffer = llvm::LLVMRustThinLTOBufferCreate(m, is_thin, emit_summary); + let buffer = llvm::LLVMRustThinLTOBufferCreate(m, is_thin); ThinBuffer(buffer) } } @@ -692,6 +695,14 @@ impl ThinBuffer { let mut ptr = NonNull::new(ptr).unwrap(); ThinBuffer(unsafe { ptr.as_mut() }) } + + pub(crate) fn thin_link_data(&self) -> &[u8] { + unsafe { + let ptr = llvm::LLVMRustThinLTOBufferThinLinkDataPtr(self.0) as *const _; + let len = llvm::LLVMRustThinLTOBufferThinLinkDataLen(self.0); + slice::from_raw_parts(ptr, len) + } + } } impl ThinBufferMethods for ThinBuffer { @@ -702,14 +713,6 @@ impl ThinBufferMethods for ThinBuffer { slice::from_raw_parts(ptr, len) } } - - fn thin_link_data(&self) -> &[u8] { - unsafe { - let ptr = llvm::LLVMRustThinLTOBufferThinLinkDataPtr(self.0) as *const _; - let len = llvm::LLVMRustThinLTOBufferThinLinkDataLen(self.0); - slice::from_raw_parts(ptr, len) - } - } } impl Drop for ThinBuffer { diff --git a/compiler/rustc_codegen_llvm/src/back/write.rs b/compiler/rustc_codegen_llvm/src/back/write.rs index 7ea2ae6673b0..423f0da48781 100644 --- a/compiler/rustc_codegen_llvm/src/back/write.rs +++ b/compiler/rustc_codegen_llvm/src/back/write.rs @@ -837,7 +837,7 @@ pub(crate) fn codegen( "LLVM_module_codegen_make_bitcode", &*module.name, ); - ThinBuffer::new(llmod, config.emit_thin_lto, false) + ThinBuffer::new(llmod, config.emit_thin_lto) }; let data = thin.data(); let _timer = cgcx diff --git a/compiler/rustc_codegen_llvm/src/builder/gpu_offload.rs b/compiler/rustc_codegen_llvm/src/builder/gpu_offload.rs index 1280ab1442a0..0737a18384bd 100644 --- a/compiler/rustc_codegen_llvm/src/builder/gpu_offload.rs +++ b/compiler/rustc_codegen_llvm/src/builder/gpu_offload.rs @@ -193,7 +193,7 @@ fn gen_define_handling<'ll>( // reference) types. let num_ptr_types = types .iter() - .map(|&x| matches!(cx.type_kind(x), rustc_codegen_ssa::common::TypeKind::Pointer)) + .filter(|&x| matches!(cx.type_kind(x), rustc_codegen_ssa::common::TypeKind::Pointer)) .count(); // We do not know their size anymore at this level, so hardcode a placeholder. diff --git a/compiler/rustc_codegen_llvm/src/context.rs b/compiler/rustc_codegen_llvm/src/context.rs index 257c7b95666f..a69fa54a54a4 100644 --- a/compiler/rustc_codegen_llvm/src/context.rs +++ b/compiler/rustc_codegen_llvm/src/context.rs @@ -853,7 +853,7 @@ impl<'ll, 'tcx> MiscCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> { fn declare_c_main(&self, fn_type: Self::Type) -> Option { let entry_name = self.sess().target.entry_name.as_ref(); if self.get_declared_value(entry_name).is_none() { - Some(self.declare_entry_fn( + let llfn = self.declare_entry_fn( entry_name, llvm::CallConv::from_conv( self.sess().target.entry_abi, @@ -861,7 +861,13 @@ impl<'ll, 'tcx> MiscCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> { ), llvm::UnnamedAddr::Global, fn_type, - )) + ); + attributes::apply_to_llfn( + llfn, + llvm::AttributePlace::Function, + attributes::target_features_attr(self, vec![]).as_slice(), + ); + Some(llfn) } else { // If the symbol already exists, it is an error: for example, the user wrote // #[no_mangle] extern "C" fn main(..) {..} diff --git a/compiler/rustc_codegen_llvm/src/lib.rs b/compiler/rustc_codegen_llvm/src/lib.rs index 628cb34fd9e4..6fb23d098433 100644 --- a/compiler/rustc_codegen_llvm/src/lib.rs +++ b/compiler/rustc_codegen_llvm/src/lib.rs @@ -211,11 +211,8 @@ impl WriteBackendMethods for LlvmCodegenBackend { ) -> CompiledModule { back::write::codegen(cgcx, module, config) } - fn prepare_thin( - module: ModuleCodegen, - emit_summary: bool, - ) -> (String, Self::ThinBuffer) { - back::lto::prepare_thin(module, emit_summary) + fn prepare_thin(module: ModuleCodegen) -> (String, Self::ThinBuffer) { + back::lto::prepare_thin(module) } fn serialize_module(module: ModuleCodegen) -> (String, Self::ModuleBuffer) { (module.name, back::lto::ModuleBuffer::new(module.module_llvm.llmod())) diff --git a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs index b66fc157b3cb..0679f55ab7f0 100644 --- a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs +++ b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs @@ -2602,7 +2602,6 @@ unsafe extern "C" { pub(crate) fn LLVMRustThinLTOBufferCreate( M: &Module, is_thin: bool, - emit_summary: bool, ) -> &'static mut ThinLTOBuffer; pub(crate) fn LLVMRustThinLTOBufferFree(M: &'static mut ThinLTOBuffer); pub(crate) fn LLVMRustThinLTOBufferPtr(M: &ThinLTOBuffer) -> *const c_char; diff --git a/compiler/rustc_codegen_ssa/src/back/lto.rs b/compiler/rustc_codegen_ssa/src/back/lto.rs index f4a9037940a6..e6df6a2469f3 100644 --- a/compiler/rustc_codegen_ssa/src/back/lto.rs +++ b/compiler/rustc_codegen_ssa/src/back/lto.rs @@ -1,7 +1,6 @@ use std::ffi::CString; use std::sync::Arc; -use rustc_ast::expand::allocator::AllocatorKind; use rustc_data_structures::memmap::Mmap; use rustc_hir::def_id::{CrateNum, LOCAL_CRATE}; use rustc_middle::middle::exported_symbols::{ExportedSymbol, SymbolExportInfo, SymbolExportLevel}; @@ -96,19 +95,6 @@ pub(super) fn exported_symbols_for_lto( .filter_map(|&(s, info): &(ExportedSymbol<'_>, SymbolExportInfo)| { if info.level.is_below_threshold(export_threshold) || info.used { Some(symbol_name_for_instance_in_crate(tcx, s, cnum)) - } else if export_threshold == SymbolExportLevel::C - && info.rustc_std_internal_symbol - && let Some(AllocatorKind::Default) = allocator_kind_for_codegen(tcx) - { - // Export the __rdl_* exports for usage by the allocator shim when not using - // #[global_allocator]. Most of the conditions above are only used to avoid - // unnecessary expensive symbol_name_for_instance_in_crate calls. - let sym = symbol_name_for_instance_in_crate(tcx, s, cnum); - if sym.contains("__rdl_") || sym.contains("__rg_oom") { - Some(sym) - } else { - None - } } else { None } diff --git a/compiler/rustc_codegen_ssa/src/back/write.rs b/compiler/rustc_codegen_ssa/src/back/write.rs index f637e7f58dbf..cbaf67d73454 100644 --- a/compiler/rustc_codegen_ssa/src/back/write.rs +++ b/compiler/rustc_codegen_ssa/src/back/write.rs @@ -334,6 +334,7 @@ pub struct CodegenContext { pub output_filenames: Arc, pub invocation_temp: Option, pub module_config: Arc, + pub allocator_config: Arc, pub tm_factory: TargetMachineFactoryFn, pub msvc_imps_needed: bool, pub is_pe_coff: bool, @@ -489,7 +490,7 @@ fn copy_all_cgu_workproducts_to_incr_comp_cache_dir( let _timer = sess.timer("copy_all_cgu_workproducts_to_incr_comp_cache_dir"); - for module in &compiled_modules.modules { + for module in compiled_modules.modules.iter().filter(|m| m.kind == ModuleKind::Regular) { let mut files = Vec::new(); if let Some(object_file_path) = &module.object { files.push((OutputType::Object.extension(), object_file_path.as_path())); @@ -794,12 +795,19 @@ pub(crate) fn compute_per_cgu_lto_type( sess_lto: &Lto, opts: &config::Options, sess_crate_types: &[CrateType], + module_kind: ModuleKind, ) -> ComputedLtoType { // If the linker does LTO, we don't have to do it. Note that we // keep doing full LTO, if it is requested, as not to break the // assumption that the output will be a single module. let linker_does_lto = opts.cg.linker_plugin_lto.enabled(); + // When we're automatically doing ThinLTO for multi-codegen-unit + // builds we don't actually want to LTO the allocator module if + // it shows up. This is due to various linker shenanigans that + // we'll encounter later. + let is_allocator = module_kind == ModuleKind::Allocator; + // We ignore a request for full crate graph LTO if the crate type // is only an rlib, as there is no full crate graph to process, // that'll happen later. @@ -811,7 +819,7 @@ pub(crate) fn compute_per_cgu_lto_type( let is_rlib = matches!(sess_crate_types, [CrateType::Rlib]); match sess_lto { - Lto::ThinLocal if !linker_does_lto => ComputedLtoType::Thin, + Lto::ThinLocal if !linker_does_lto && !is_allocator => ComputedLtoType::Thin, Lto::Thin if !linker_does_lto && !is_rlib => ComputedLtoType::Thin, Lto::Fat if !is_rlib => ComputedLtoType::Fat, _ => ComputedLtoType::No, @@ -822,21 +830,28 @@ fn execute_optimize_work_item( cgcx: &CodegenContext, mut module: ModuleCodegen, ) -> WorkItemResult { + let _timer = cgcx.prof.generic_activity_with_arg("codegen_module_optimize", &*module.name); + let dcx = cgcx.create_dcx(); let dcx = dcx.handle(); - B::optimize(cgcx, dcx, &mut module, &cgcx.module_config); + let module_config = match module.kind { + ModuleKind::Regular => &cgcx.module_config, + ModuleKind::Allocator => &cgcx.allocator_config, + }; + + B::optimize(cgcx, dcx, &mut module, module_config); // After we've done the initial round of optimizations we need to // decide whether to synchronously codegen this module or ship it // back to the coordinator thread for further LTO processing (which // has to wait for all the initial modules to be optimized). - let lto_type = compute_per_cgu_lto_type(&cgcx.lto, &cgcx.opts, &cgcx.crate_types); + let lto_type = compute_per_cgu_lto_type(&cgcx.lto, &cgcx.opts, &cgcx.crate_types, module.kind); // If we're doing some form of incremental LTO then we need to be sure to // save our module to disk first. - let bitcode = if cgcx.module_config.emit_pre_lto_bc { + let bitcode = if module_config.emit_pre_lto_bc { let filename = pre_lto_bitcode_filename(&module.name); cgcx.incr_comp_session_dir.as_ref().map(|path| path.join(&filename)) } else { @@ -845,11 +860,11 @@ fn execute_optimize_work_item( match lto_type { ComputedLtoType::No => { - let module = B::codegen(cgcx, module, &cgcx.module_config); + let module = B::codegen(cgcx, module, module_config); WorkItemResult::Finished(module) } ComputedLtoType::Thin => { - let (name, thin_buffer) = B::prepare_thin(module, false); + let (name, thin_buffer) = B::prepare_thin(module); if let Some(path) = bitcode { fs::write(&path, thin_buffer.data()).unwrap_or_else(|e| { panic!("Error writing pre-lto-bitcode file `{}`: {}", path.display(), e); @@ -877,6 +892,10 @@ fn execute_copy_from_cache_work_item( cgcx: &CodegenContext, module: CachedModuleCodegen, ) -> WorkItemResult { + let _timer = cgcx + .prof + .generic_activity_with_arg("codegen_copy_artifacts_from_incr_cache", &*module.name); + let incr_comp_session_dir = cgcx.incr_comp_session_dir.as_ref().unwrap(); let mut links_from_incr_cache = Vec::new(); @@ -947,6 +966,7 @@ fn execute_copy_from_cache_work_item( WorkItemResult::Finished(CompiledModule { links_from_incr_cache, + kind: ModuleKind::Regular, name: module.name, object, dwarf_object, @@ -963,6 +983,8 @@ fn execute_fat_lto_work_item( mut needs_fat_lto: Vec>, import_only_modules: Vec<(SerializedModule, WorkProduct)>, ) -> WorkItemResult { + let _timer = cgcx.prof.generic_activity_with_arg("codegen_module_perform_lto", "everything"); + for (module, wp) in import_only_modules { needs_fat_lto.push(FatLtoInput::Serialized { name: wp.cgu_name, buffer: module }) } @@ -981,6 +1003,8 @@ fn execute_thin_lto_work_item( cgcx: &CodegenContext, module: lto::ThinModule, ) -> WorkItemResult { + let _timer = cgcx.prof.generic_activity_with_arg("codegen_module_perform_lto", module.name()); + let module = B::optimize_thin(cgcx, module); let module = B::codegen(cgcx, module, &cgcx.module_config); WorkItemResult::Finished(module) @@ -1133,6 +1157,7 @@ fn start_executing_work( diag_emitter: shared_emitter.clone(), output_filenames: Arc::clone(tcx.output_filenames(())), module_config: regular_config, + allocator_config, tm_factory: backend.target_machine_factory(tcx.sess, ol, backend_features), msvc_imps_needed: msvc_imps_needed(tcx), is_pe_coff: tcx.sess.target.is_like_windows, @@ -1147,11 +1172,6 @@ fn start_executing_work( invocation_temp: sess.invocation_temp.clone(), }; - let compiled_allocator_module = allocator_module.map(|mut allocator_module| { - B::optimize(&cgcx, tcx.sess.dcx(), &mut allocator_module, &allocator_config); - B::codegen(&cgcx, allocator_module, &allocator_config) - }); - // This is the "main loop" of parallel work happening for parallel codegen. // It's here that we manage parallelism, schedule work, and work with // messages coming from clients. @@ -1331,6 +1351,17 @@ fn start_executing_work( let mut llvm_start_time: Option> = None; + let compiled_allocator_module = allocator_module.and_then(|allocator_module| { + match execute_optimize_work_item(&cgcx, allocator_module) { + WorkItemResult::Finished(compiled_module) => return Some(compiled_module), + WorkItemResult::NeedsFatLto(fat_lto_input) => needs_fat_lto.push(fat_lto_input), + WorkItemResult::NeedsThinLto(name, thin_buffer) => { + needs_thin_lto.push((name, thin_buffer)) + } + } + None + }); + // Run the message loop while there's still anything that needs message // processing. Note that as soon as codegen is aborted we simply want to // wait for all existing work to finish, so many of the conditions here @@ -1693,38 +1724,21 @@ fn spawn_work<'a, B: ExtraBackendMethods>( B::spawn_named_thread(cgcx.time_trace, work.short_description(), move || { let result = std::panic::catch_unwind(AssertUnwindSafe(|| match work { - WorkItem::Optimize(m) => { - let _timer = - cgcx.prof.generic_activity_with_arg("codegen_module_optimize", &*m.name); - execute_optimize_work_item(&cgcx, m) - } - WorkItem::CopyPostLtoArtifacts(m) => { - let _timer = cgcx - .prof - .generic_activity_with_arg("codegen_copy_artifacts_from_incr_cache", &*m.name); - execute_copy_from_cache_work_item(&cgcx, m) - } + WorkItem::Optimize(m) => execute_optimize_work_item(&cgcx, m), + WorkItem::CopyPostLtoArtifacts(m) => execute_copy_from_cache_work_item(&cgcx, m), WorkItem::FatLto { exported_symbols_for_lto, each_linked_rlib_for_lto, needs_fat_lto, import_only_modules, - } => { - let _timer = - cgcx.prof.generic_activity_with_arg("codegen_module_perform_lto", "everything"); - execute_fat_lto_work_item( - &cgcx, - &exported_symbols_for_lto, - &each_linked_rlib_for_lto, - needs_fat_lto, - import_only_modules, - ) - } - WorkItem::ThinLto(m) => { - let _timer = - cgcx.prof.generic_activity_with_arg("codegen_module_perform_lto", m.name()); - execute_thin_lto_work_item(&cgcx, m) - } + } => execute_fat_lto_work_item( + &cgcx, + &exported_symbols_for_lto, + &each_linked_rlib_for_lto, + needs_fat_lto, + import_only_modules, + ), + WorkItem::ThinLto(m) => execute_thin_lto_work_item(&cgcx, m), })); let msg = match result { diff --git a/compiler/rustc_codegen_ssa/src/base.rs b/compiler/rustc_codegen_ssa/src/base.rs index a9a2ae1b3dbc..45b028aa8eff 100644 --- a/compiler/rustc_codegen_ssa/src/base.rs +++ b/compiler/rustc_codegen_ssa/src/base.rs @@ -46,7 +46,9 @@ use crate::meth::load_vtable; use crate::mir::operand::OperandValue; use crate::mir::place::PlaceRef; use crate::traits::*; -use crate::{CachedModuleCodegen, CodegenLintLevels, CrateInfo, ModuleCodegen, errors, meth, mir}; +use crate::{ + CachedModuleCodegen, CodegenLintLevels, CrateInfo, ModuleCodegen, ModuleKind, errors, meth, mir, +}; pub(crate) fn bin_op_to_icmp_predicate(op: BinOp, signed: bool) -> IntPredicate { match (op, signed) { @@ -1124,7 +1126,12 @@ pub fn determine_cgu_reuse<'tcx>(tcx: TyCtxt<'tcx>, cgu: &CodegenUnit<'tcx>) -> // We can re-use either the pre- or the post-thinlto state. If no LTO is // being performed then we can use post-LTO artifacts, otherwise we must // reuse pre-LTO artifacts - match compute_per_cgu_lto_type(&tcx.sess.lto(), &tcx.sess.opts, tcx.crate_types()) { + match compute_per_cgu_lto_type( + &tcx.sess.lto(), + &tcx.sess.opts, + tcx.crate_types(), + ModuleKind::Regular, + ) { ComputedLtoType::No => CguReuse::PostLto, _ => CguReuse::PreLto, } diff --git a/compiler/rustc_codegen_ssa/src/lib.rs b/compiler/rustc_codegen_ssa/src/lib.rs index 5b90ffaa0566..baba8f9ca3e8 100644 --- a/compiler/rustc_codegen_ssa/src/lib.rs +++ b/compiler/rustc_codegen_ssa/src/lib.rs @@ -119,7 +119,8 @@ impl ModuleCodegen { }); CompiledModule { - name: self.name.clone(), + name: self.name, + kind: self.kind, object, dwarf_object, bytecode, @@ -133,6 +134,7 @@ impl ModuleCodegen { #[derive(Debug, Encodable, Decodable)] pub struct CompiledModule { pub name: String, + pub kind: ModuleKind, pub object: Option, pub dwarf_object: Option, pub bytecode: Option, diff --git a/compiler/rustc_codegen_ssa/src/mir/rvalue.rs b/compiler/rustc_codegen_ssa/src/mir/rvalue.rs index 8a67b8d6e5f1..f6f2e3f2a3a3 100644 --- a/compiler/rustc_codegen_ssa/src/mir/rvalue.rs +++ b/compiler/rustc_codegen_ssa/src/mir/rvalue.rs @@ -1,3 +1,4 @@ +use itertools::Itertools as _; use rustc_abi::{self as abi, FIRST_VARIANT}; use rustc_middle::ty::adjustment::PointerCoercion; use rustc_middle::ty::layout::{HasTyCtxt, HasTypingEnv, LayoutOf, TyAndLayout}; @@ -111,14 +112,13 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> { let size = bx.const_usize(dest.layout.size.bytes()); // Use llvm.memset.p0i8.* to initialize all same byte arrays - if let Some(int) = bx.cx().const_to_opt_u128(v, false) { - let bytes = &int.to_le_bytes()[..cg_elem.layout.size.bytes_usize()]; - let first = bytes[0]; - if bytes[1..].iter().all(|&b| b == first) { - let fill = bx.cx().const_u8(first); - bx.memset(start, fill, size, dest.val.align, MemFlags::empty()); - return true; - } + if let Some(int) = bx.cx().const_to_opt_u128(v, false) + && let bytes = &int.to_le_bytes()[..cg_elem.layout.size.bytes_usize()] + && let Ok(&byte) = bytes.iter().all_equal_value() + { + let fill = bx.cx().const_u8(byte); + bx.memset(start, fill, size, dest.val.align, MemFlags::empty()); + return true; } // Use llvm.memset.p0i8.* to initialize byte arrays @@ -130,13 +130,10 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> { false }; - match cg_elem.val { - OperandValue::Immediate(v) => { - if try_init_all_same(bx, v) { - return; - } - } - _ => (), + if let OperandValue::Immediate(v) = cg_elem.val + && try_init_all_same(bx, v) + { + return; } let count = self diff --git a/compiler/rustc_codegen_ssa/src/traits/write.rs b/compiler/rustc_codegen_ssa/src/traits/write.rs index cc7c4e46d7bb..1ac1d7ef2e2e 100644 --- a/compiler/rustc_codegen_ssa/src/traits/write.rs +++ b/compiler/rustc_codegen_ssa/src/traits/write.rs @@ -50,16 +50,12 @@ pub trait WriteBackendMethods: Clone + 'static { module: ModuleCodegen, config: &ModuleConfig, ) -> CompiledModule; - fn prepare_thin( - module: ModuleCodegen, - want_summary: bool, - ) -> (String, Self::ThinBuffer); + fn prepare_thin(module: ModuleCodegen) -> (String, Self::ThinBuffer); fn serialize_module(module: ModuleCodegen) -> (String, Self::ModuleBuffer); } pub trait ThinBufferMethods: Send + Sync { fn data(&self) -> &[u8]; - fn thin_link_data(&self) -> &[u8]; } pub trait ModuleBufferMethods: Send + Sync { diff --git a/compiler/rustc_errors/src/diagnostic.rs b/compiler/rustc_errors/src/diagnostic.rs index 96a4ed3218fb..ae23ef1e2553 100644 --- a/compiler/rustc_errors/src/diagnostic.rs +++ b/compiler/rustc_errors/src/diagnostic.rs @@ -945,11 +945,6 @@ impl<'a, G: EmissionGuarantee> Diag<'a, G> { None, "Span must not be empty and have no suggestion", ); - debug_assert_eq!( - parts.array_windows().find(|[a, b]| a.span.overlaps(b.span)), - None, - "suggestion must not have overlapping parts", - ); self.push_suggestion(CodeSuggestion { substitutions: vec![Substitution { parts }], diff --git a/compiler/rustc_errors/src/emitter.rs b/compiler/rustc_errors/src/emitter.rs index b94370e8e9b4..93b1e6b76152 100644 --- a/compiler/rustc_errors/src/emitter.rs +++ b/compiler/rustc_errors/src/emitter.rs @@ -2354,7 +2354,6 @@ impl HumanEmitter { .sum(); let underline_start = (span_start_pos + start) as isize + offset; let underline_end = (span_start_pos + start + sub_len) as isize + offset; - assert!(underline_start >= 0 && underline_end >= 0); let padding: usize = max_line_num_len + 3; for p in underline_start..underline_end { if let DisplaySuggestion::Underline = show_code_change diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs index a56e0f3fae13..8869799ce90d 100644 --- a/compiler/rustc_errors/src/lib.rs +++ b/compiler/rustc_errors/src/lib.rs @@ -381,6 +381,17 @@ impl CodeSuggestion { // Assumption: all spans are in the same file, and all spans // are disjoint. Sort in ascending order. substitution.parts.sort_by_key(|part| part.span.lo()); + // Verify the assumption that all spans are disjoint + assert_eq!( + substitution.parts.array_windows().find(|[a, b]| a.span.overlaps(b.span)), + None, + "all spans must be disjoint", + ); + + // Account for cases where we are suggesting the same code that's already + // there. This shouldn't happen often, but in some cases for multipart + // suggestions it's much easier to handle it here than in the origin. + substitution.parts.retain(|p| is_different(sm, &p.snippet, p.span)); // Find the bounding span. let lo = substitution.parts.iter().map(|part| part.span.lo()).min()?; @@ -470,16 +481,12 @@ impl CodeSuggestion { _ => 1, }) .sum(); - if !is_different(sm, &part.snippet, part.span) { - // Account for cases where we are suggesting the same code that's already - // there. This shouldn't happen often, but in some cases for multipart - // suggestions it's much easier to handle it here than in the origin. - } else { - line_highlight.push(SubstitutionHighlight { - start: (cur_lo.col.0 as isize + acc) as usize, - end: (cur_lo.col.0 as isize + acc + len) as usize, - }); - } + + line_highlight.push(SubstitutionHighlight { + start: (cur_lo.col.0 as isize + acc) as usize, + end: (cur_lo.col.0 as isize + acc + len) as usize, + }); + buf.push_str(&part.snippet); let cur_hi = sm.lookup_char_pos(part.span.hi()); // Account for the difference between the width of the current code and the diff --git a/compiler/rustc_hir_typeck/src/coercion.rs b/compiler/rustc_hir_typeck/src/coercion.rs index e66601631fcc..b99f811db1a1 100644 --- a/compiler/rustc_hir_typeck/src/coercion.rs +++ b/compiler/rustc_hir_typeck/src/coercion.rs @@ -1897,7 +1897,7 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> { fcx.suggest_semicolon_at_end(cond_expr.span, &mut err); } } - }; + } // If this is due to an explicit `return`, suggest adding a return type. if let Some((fn_id, fn_decl)) = fcx.get_fn_decl(block_or_return_id) diff --git a/compiler/rustc_hir_typeck/src/expr.rs b/compiler/rustc_hir_typeck/src/expr.rs index a652e08905a5..7adbee7ff285 100644 --- a/compiler/rustc_hir_typeck/src/expr.rs +++ b/compiler/rustc_hir_typeck/src/expr.rs @@ -2585,12 +2585,11 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { .filter(|item| item.is_fn() && !item.is_method()) .filter_map(|item| { // Only assoc fns that return `Self` - let fn_sig = self.tcx.fn_sig(item.def_id).skip_binder(); - let ret_ty = fn_sig.output(); - let ret_ty = self.tcx.normalize_erasing_late_bound_regions( - self.typing_env(self.param_env), - ret_ty, - ); + let fn_sig = self + .tcx + .fn_sig(item.def_id) + .instantiate(self.tcx, self.fresh_args_for_item(span, item.def_id)); + let ret_ty = self.tcx.instantiate_bound_regions_with_erased(fn_sig.output()); if !self.can_eq(self.param_env, ret_ty, adt_ty) { return None; } diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs index 5aec50c8b538..94b635c41b4b 100644 --- a/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs +++ b/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs @@ -1912,7 +1912,22 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { hir::StmtKind::Expr(ref expr) => { // Check with expected type of `()`. self.check_expr_has_type_or_error(expr, self.tcx.types.unit, |err| { - if expr.can_have_side_effects() { + if self.is_next_stmt_expr_continuation(stmt.hir_id) + && let hir::ExprKind::Match(..) | hir::ExprKind::If(..) = expr.kind + { + // We have something like `match () { _ => true } && true`. Suggest + // wrapping in parentheses. We find the statement or expression + // following the `match` (`&& true`) and see if it is something that + // can reasonably be interpreted as a binop following an expression. + err.multipart_suggestion( + "parentheses are required to parse this as an expression", + vec![ + (expr.span.shrink_to_lo(), "(".to_string()), + (expr.span.shrink_to_hi(), ")".to_string()), + ], + Applicability::MachineApplicable, + ); + } else if expr.can_have_side_effects() { self.suggest_semicolon_at_end(expr.span, err); } }); diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs index aca3840712e7..84ea2ec0f8a4 100644 --- a/compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs +++ b/compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs @@ -1,3 +1,4 @@ +// ignore-tidy-filelength use core::cmp::min; use core::iter; @@ -766,53 +767,118 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { needs_block: bool, parent_is_closure: bool, ) { - if expected.is_unit() { - // `BlockTailExpression` only relevant if the tail expr would be - // useful on its own. - match expression.kind { - ExprKind::Call(..) - | ExprKind::MethodCall(..) - | ExprKind::Loop(..) - | ExprKind::If(..) - | ExprKind::Match(..) - | ExprKind::Block(..) - if expression.can_have_side_effects() - // If the expression is from an external macro, then do not suggest - // adding a semicolon, because there's nowhere to put it. - // See issue #81943. - && !expression.span.in_external_macro(self.tcx.sess.source_map()) => + if !expected.is_unit() { + return; + } + // `BlockTailExpression` only relevant if the tail expr would be + // useful on its own. + match expression.kind { + ExprKind::Call(..) + | ExprKind::MethodCall(..) + | ExprKind::Loop(..) + | ExprKind::If(..) + | ExprKind::Match(..) + | ExprKind::Block(..) + if expression.can_have_side_effects() + // If the expression is from an external macro, then do not suggest + // adding a semicolon, because there's nowhere to put it. + // See issue #81943. + && !expression.span.in_external_macro(self.tcx.sess.source_map()) => + { + if needs_block { + err.multipart_suggestion( + "consider using a semicolon here", + vec![ + (expression.span.shrink_to_lo(), "{ ".to_owned()), + (expression.span.shrink_to_hi(), "; }".to_owned()), + ], + Applicability::MachineApplicable, + ); + } else if let hir::Node::Block(block) = self.tcx.parent_hir_node(expression.hir_id) + && let hir::Node::Expr(expr) = self.tcx.parent_hir_node(block.hir_id) + && let hir::Node::Expr(if_expr) = self.tcx.parent_hir_node(expr.hir_id) + && let hir::ExprKind::If(_cond, _then, Some(_else)) = if_expr.kind + && let hir::Node::Stmt(stmt) = self.tcx.parent_hir_node(if_expr.hir_id) + && let hir::StmtKind::Expr(_) = stmt.kind + && self.is_next_stmt_expr_continuation(stmt.hir_id) { - if needs_block { - err.multipart_suggestion( - "consider using a semicolon here", - vec![ - (expression.span.shrink_to_lo(), "{ ".to_owned()), - (expression.span.shrink_to_hi(), "; }".to_owned()), - ], - Applicability::MachineApplicable, - ); - } else { - err.span_suggestion( - expression.span.shrink_to_hi(), - "consider using a semicolon here", - ";", - Applicability::MachineApplicable, - ); - } - } - ExprKind::Path(..) | ExprKind::Lit(_) - if parent_is_closure - && !expression.span.in_external_macro(self.tcx.sess.source_map()) => - { - err.span_suggestion_verbose( - expression.span.shrink_to_lo(), - "consider ignoring the value", - "_ = ", + err.multipart_suggestion( + "parentheses are required to parse this as an expression", + vec![ + (stmt.span.shrink_to_lo(), "(".to_string()), + (stmt.span.shrink_to_hi(), ")".to_string()), + ], + Applicability::MachineApplicable, + ); + } else { + err.span_suggestion( + expression.span.shrink_to_hi(), + "consider using a semicolon here", + ";", Applicability::MachineApplicable, ); } - _ => (), } + ExprKind::Path(..) | ExprKind::Lit(_) + if parent_is_closure + && !expression.span.in_external_macro(self.tcx.sess.source_map()) => + { + err.span_suggestion_verbose( + expression.span.shrink_to_lo(), + "consider ignoring the value", + "_ = ", + Applicability::MachineApplicable, + ); + } + _ => { + if let hir::Node::Block(block) = self.tcx.parent_hir_node(expression.hir_id) + && let hir::Node::Expr(expr) = self.tcx.parent_hir_node(block.hir_id) + && let hir::Node::Expr(if_expr) = self.tcx.parent_hir_node(expr.hir_id) + && let hir::ExprKind::If(_cond, _then, Some(_else)) = if_expr.kind + && let hir::Node::Stmt(stmt) = self.tcx.parent_hir_node(if_expr.hir_id) + && let hir::StmtKind::Expr(_) = stmt.kind + && self.is_next_stmt_expr_continuation(stmt.hir_id) + { + // The error is pointing at an arm of an if-expression, and we want to get the + // `Span` of the whole if-expression for the suggestion. This only works for a + // single level of nesting, which is fine. + // We have something like `if true { false } else { true } && true`. Suggest + // wrapping in parentheses. We find the statement or expression following the + // `if` (`&& true`) and see if it is something that can reasonably be + // interpreted as a binop following an expression. + err.multipart_suggestion( + "parentheses are required to parse this as an expression", + vec![ + (stmt.span.shrink_to_lo(), "(".to_string()), + (stmt.span.shrink_to_hi(), ")".to_string()), + ], + Applicability::MachineApplicable, + ); + } + } + } + } + + pub(crate) fn is_next_stmt_expr_continuation(&self, hir_id: HirId) -> bool { + if let hir::Node::Block(b) = self.tcx.parent_hir_node(hir_id) + && let mut stmts = b.stmts.iter().skip_while(|s| s.hir_id != hir_id) + && let Some(_) = stmts.next() // The statement the statement that was passed in + && let Some(next) = match (stmts.next(), b.expr) { // The following statement + (Some(next), _) => match next.kind { + hir::StmtKind::Expr(next) | hir::StmtKind::Semi(next) => Some(next), + _ => None, + }, + (None, Some(next)) => Some(next), + _ => None, + } + && let hir::ExprKind::AddrOf(..) // prev_stmt && next + | hir::ExprKind::Unary(..) // prev_stmt * next + | hir::ExprKind::Err(_) = next.kind + // prev_stmt + next + { + true + } else { + false } } diff --git a/compiler/rustc_index/src/interval.rs b/compiler/rustc_index/src/interval.rs index 0225c5c4f329..dda5253e7c54 100644 --- a/compiler/rustc_index/src/interval.rs +++ b/compiler/rustc_index/src/interval.rs @@ -140,6 +140,30 @@ impl IntervalSet { result } + /// Specialized version of `insert` when we know that the inserted point is *after* any + /// contained. + pub fn append(&mut self, point: I) { + let point = point.index() as u32; + + if let Some((_, last_end)) = self.map.last_mut() { + assert!(*last_end <= point); + if point == *last_end { + // The point is already in the set. + } else if point == *last_end + 1 { + *last_end = point; + } else { + self.map.push((point, point)); + } + } else { + self.map.push((point, point)); + } + + debug_assert!( + self.check_invariants(), + "wrong intervals after append {point:?} to {self:?}" + ); + } + pub fn contains(&self, needle: I) -> bool { let needle = needle.index() as u32; let Some(last) = self.map.partition_point(|r| r.0 <= needle).checked_sub(1) else { @@ -176,6 +200,32 @@ impl IntervalSet { }) } + pub fn disjoint(&self, other: &IntervalSet) -> bool + where + I: Step, + { + let helper = move || { + let mut self_iter = self.iter_intervals(); + let mut other_iter = other.iter_intervals(); + + let mut self_current = self_iter.next()?; + let mut other_current = other_iter.next()?; + + loop { + if self_current.end <= other_current.start { + self_current = self_iter.next()?; + continue; + } + if other_current.end <= self_current.start { + other_current = other_iter.next()?; + continue; + } + return Some(false); + } + }; + helper().unwrap_or(true) + } + pub fn is_empty(&self) -> bool { self.map.is_empty() } @@ -325,6 +375,10 @@ impl SparseIntervalMatrix { self.ensure_row(row).insert(point) } + pub fn append(&mut self, row: R, point: C) { + self.ensure_row(row).append(point) + } + pub fn contains(&self, row: R, point: C) -> bool { self.row(row).is_some_and(|r| r.contains(point)) } diff --git a/compiler/rustc_infer/src/infer/context.rs b/compiler/rustc_infer/src/infer/context.rs index bb9c88500936..8265fccabc96 100644 --- a/compiler/rustc_infer/src/infer/context.rs +++ b/compiler/rustc_infer/src/infer/context.rs @@ -1,4 +1,4 @@ -///! Definition of `InferCtxtLike` from the librarified type layer. +//! Definition of `InferCtxtLike` from the librarified type layer. use rustc_hir::def_id::DefId; use rustc_middle::traits::ObligationCause; use rustc_middle::ty::relate::RelateResult; diff --git a/compiler/rustc_lint/Cargo.toml b/compiler/rustc_lint/Cargo.toml index 7718f16984da..3a50aac50cb3 100644 --- a/compiler/rustc_lint/Cargo.toml +++ b/compiler/rustc_lint/Cargo.toml @@ -5,6 +5,7 @@ edition = "2024" [dependencies] # tidy-alphabetical-start +bitflags = "2.4.1" rustc_abi = { path = "../rustc_abi" } rustc_ast = { path = "../rustc_ast" } rustc_ast_pretty = { path = "../rustc_ast_pretty" } diff --git a/compiler/rustc_lint/src/foreign_modules.rs b/compiler/rustc_lint/src/foreign_modules.rs index 3267e70f1de2..ad73e15e31f3 100644 --- a/compiler/rustc_lint/src/foreign_modules.rs +++ b/compiler/rustc_lint/src/foreign_modules.rs @@ -136,7 +136,6 @@ impl ClashingExternDeclarations { ty::TypingEnv::non_body_analysis(tcx, this_fi.owner_id), existing_decl_ty, this_decl_ty, - types::CItemKind::Declaration, ) { let orig = name_of_extern_decl(tcx, existing_did); @@ -214,10 +213,9 @@ fn structurally_same_type<'tcx>( typing_env: ty::TypingEnv<'tcx>, a: Ty<'tcx>, b: Ty<'tcx>, - ckind: types::CItemKind, ) -> bool { let mut seen_types = UnordSet::default(); - let result = structurally_same_type_impl(&mut seen_types, tcx, typing_env, a, b, ckind); + let result = structurally_same_type_impl(&mut seen_types, tcx, typing_env, a, b); if cfg!(debug_assertions) && result { // Sanity-check: must have same ABI, size and alignment. // `extern` blocks cannot be generic, so we'll always get a layout here. @@ -236,7 +234,6 @@ fn structurally_same_type_impl<'tcx>( typing_env: ty::TypingEnv<'tcx>, a: Ty<'tcx>, b: Ty<'tcx>, - ckind: types::CItemKind, ) -> bool { debug!("structurally_same_type_impl(tcx, a = {:?}, b = {:?})", a, b); @@ -307,7 +304,6 @@ fn structurally_same_type_impl<'tcx>( typing_env, tcx.type_of(a_did).instantiate(tcx, a_gen_args), tcx.type_of(b_did).instantiate(tcx, b_gen_args), - ckind, ) }, ) @@ -315,25 +311,19 @@ fn structurally_same_type_impl<'tcx>( (ty::Array(a_ty, a_len), ty::Array(b_ty, b_len)) => { // For arrays, we also check the length. a_len == b_len - && structurally_same_type_impl( - seen_types, tcx, typing_env, *a_ty, *b_ty, ckind, - ) + && structurally_same_type_impl(seen_types, tcx, typing_env, *a_ty, *b_ty) } (ty::Slice(a_ty), ty::Slice(b_ty)) => { - structurally_same_type_impl(seen_types, tcx, typing_env, *a_ty, *b_ty, ckind) + structurally_same_type_impl(seen_types, tcx, typing_env, *a_ty, *b_ty) } (ty::RawPtr(a_ty, a_mutbl), ty::RawPtr(b_ty, b_mutbl)) => { a_mutbl == b_mutbl - && structurally_same_type_impl( - seen_types, tcx, typing_env, *a_ty, *b_ty, ckind, - ) + && structurally_same_type_impl(seen_types, tcx, typing_env, *a_ty, *b_ty) } (ty::Ref(_a_region, a_ty, a_mut), ty::Ref(_b_region, b_ty, b_mut)) => { // For structural sameness, we don't need the region to be same. a_mut == b_mut - && structurally_same_type_impl( - seen_types, tcx, typing_env, *a_ty, *b_ty, ckind, - ) + && structurally_same_type_impl(seen_types, tcx, typing_env, *a_ty, *b_ty) } (ty::FnDef(..), ty::FnDef(..)) => { let a_poly_sig = a.fn_sig(tcx); @@ -347,7 +337,7 @@ fn structurally_same_type_impl<'tcx>( (a_sig.abi, a_sig.safety, a_sig.c_variadic) == (b_sig.abi, b_sig.safety, b_sig.c_variadic) && a_sig.inputs().iter().eq_by(b_sig.inputs().iter(), |a, b| { - structurally_same_type_impl(seen_types, tcx, typing_env, *a, *b, ckind) + structurally_same_type_impl(seen_types, tcx, typing_env, *a, *b) }) && structurally_same_type_impl( seen_types, @@ -355,7 +345,6 @@ fn structurally_same_type_impl<'tcx>( typing_env, a_sig.output(), b_sig.output(), - ckind, ) } (ty::Tuple(..), ty::Tuple(..)) => { @@ -383,14 +372,14 @@ fn structurally_same_type_impl<'tcx>( // An Adt and a primitive or pointer type. This can be FFI-safe if non-null // enum layout optimisation is being applied. (ty::Adt(..) | ty::Pat(..), _) if is_primitive_or_pointer(b) => { - if let Some(a_inner) = types::repr_nullable_ptr(tcx, typing_env, a, ckind) { + if let Some(a_inner) = types::repr_nullable_ptr(tcx, typing_env, a) { a_inner == b } else { false } } (_, ty::Adt(..) | ty::Pat(..)) if is_primitive_or_pointer(a) => { - if let Some(b_inner) = types::repr_nullable_ptr(tcx, typing_env, b, ckind) { + if let Some(b_inner) = types::repr_nullable_ptr(tcx, typing_env, b) { b_inner == a } else { false diff --git a/compiler/rustc_lint/src/lib.rs b/compiler/rustc_lint/src/lib.rs index bdbac7fc4d13..9bb53fea54a1 100644 --- a/compiler/rustc_lint/src/lib.rs +++ b/compiler/rustc_lint/src/lib.rs @@ -194,8 +194,7 @@ late_lint_methods!( DefaultCouldBeDerived: DefaultCouldBeDerived::default(), DerefIntoDynSupertrait: DerefIntoDynSupertrait, DropForgetUseless: DropForgetUseless, - ImproperCTypesDeclarations: ImproperCTypesDeclarations, - ImproperCTypesDefinitions: ImproperCTypesDefinitions, + ImproperCTypesLint: ImproperCTypesLint, InvalidFromUtf8: InvalidFromUtf8, VariantSizeDifferences: VariantSizeDifferences, PathStatements: PathStatements, diff --git a/compiler/rustc_lint/src/types.rs b/compiler/rustc_lint/src/types.rs index f8a692313f03..a72b802eb5d1 100644 --- a/compiler/rustc_lint/src/types.rs +++ b/compiler/rustc_lint/src/types.rs @@ -1,35 +1,28 @@ use std::iter; -use std::ops::ControlFlow; -use rustc_abi::{BackendRepr, TagEncoding, VariantIdx, Variants, WrappingRange}; -use rustc_data_structures::fx::FxHashSet; -use rustc_errors::DiagMessage; -use rustc_hir::intravisit::VisitorExt; -use rustc_hir::{AmbigArg, Expr, ExprKind, HirId, LangItem}; +use rustc_abi::{BackendRepr, TagEncoding, Variants, WrappingRange}; +use rustc_hir::{Expr, ExprKind, HirId, LangItem}; use rustc_middle::bug; use rustc_middle::ty::layout::{LayoutOf, SizeSkeleton}; -use rustc_middle::ty::{ - self, Adt, AdtKind, GenericArgsRef, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, - TypeVisitableExt, -}; +use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitableExt}; use rustc_session::{declare_lint, declare_lint_pass, impl_lint_pass}; -use rustc_span::def_id::LocalDefId; use rustc_span::{Span, Symbol, sym}; use tracing::debug; use {rustc_ast as ast, rustc_hir as hir}; -mod improper_ctypes; +mod improper_ctypes; // these filed do the implementation for ImproperCTypesDefinitions,ImproperCTypesDeclarations +pub(crate) use improper_ctypes::ImproperCTypesLint; use crate::lints::{ AmbiguousWidePointerComparisons, AmbiguousWidePointerComparisonsAddrMetadataSuggestion, AmbiguousWidePointerComparisonsAddrSuggestion, AmbiguousWidePointerComparisonsCastSuggestion, AmbiguousWidePointerComparisonsExpectSuggestion, AtomicOrderingFence, AtomicOrderingLoad, - AtomicOrderingStore, ImproperCTypes, InvalidAtomicOrderingDiag, InvalidNanComparisons, + AtomicOrderingStore, InvalidAtomicOrderingDiag, InvalidNanComparisons, InvalidNanComparisonsSuggestion, UnpredictableFunctionPointerComparisons, - UnpredictableFunctionPointerComparisonsSuggestion, UnusedComparisons, UsesPowerAlignment, + UnpredictableFunctionPointerComparisonsSuggestion, UnusedComparisons, VariantSizeDifferencesDiag, }; -use crate::{LateContext, LateLintPass, LintContext, fluent_generated as fluent}; +use crate::{LateContext, LateLintPass, LintContext}; mod literal; @@ -690,144 +683,6 @@ impl<'tcx> LateLintPass<'tcx> for TypeLimits { } } -declare_lint! { - /// The `improper_ctypes` lint detects incorrect use of types in foreign - /// modules. - /// - /// ### Example - /// - /// ```rust - /// unsafe extern "C" { - /// static STATIC: String; - /// } - /// ``` - /// - /// {{produces}} - /// - /// ### Explanation - /// - /// The compiler has several checks to verify that types used in `extern` - /// blocks are safe and follow certain rules to ensure proper - /// compatibility with the foreign interfaces. This lint is issued when it - /// detects a probable mistake in a definition. The lint usually should - /// provide a description of the issue, along with possibly a hint on how - /// to resolve it. - IMPROPER_CTYPES, - Warn, - "proper use of libc types in foreign modules" -} - -declare_lint_pass!(ImproperCTypesDeclarations => [IMPROPER_CTYPES]); - -declare_lint! { - /// The `improper_ctypes_definitions` lint detects incorrect use of - /// [`extern` function] definitions. - /// - /// [`extern` function]: https://doc.rust-lang.org/reference/items/functions.html#extern-function-qualifier - /// - /// ### Example - /// - /// ```rust - /// # #![allow(unused)] - /// pub extern "C" fn str_type(p: &str) { } - /// ``` - /// - /// {{produces}} - /// - /// ### Explanation - /// - /// There are many parameter and return types that may be specified in an - /// `extern` function that are not compatible with the given ABI. This - /// lint is an alert that these types should not be used. The lint usually - /// should provide a description of the issue, along with possibly a hint - /// on how to resolve it. - IMPROPER_CTYPES_DEFINITIONS, - Warn, - "proper use of libc types in foreign item definitions" -} - -declare_lint! { - /// The `uses_power_alignment` lint detects specific `repr(C)` - /// aggregates on AIX. - /// In its platform C ABI, AIX uses the "power" (as in PowerPC) alignment - /// rule (detailed in https://www.ibm.com/docs/en/xl-c-and-cpp-aix/16.1?topic=data-using-alignment-modes#alignment), - /// which can also be set for XLC by `#pragma align(power)` or - /// `-qalign=power`. Aggregates with a floating-point type as the - /// recursively first field (as in "at offset 0") modify the layout of - /// *subsequent* fields of the associated structs to use an alignment value - /// where the floating-point type is aligned on a 4-byte boundary. - /// - /// Effectively, subsequent floating-point fields act as-if they are `repr(packed(4))`. This - /// would be unsound to do in a `repr(C)` type without all the restrictions that come with - /// `repr(packed)`. Rust instead chooses a layout that maintains soundness of Rust code, at the - /// expense of incompatibility with C code. - /// - /// ### Example - /// - /// ```rust,ignore (fails on non-powerpc64-ibm-aix) - /// #[repr(C)] - /// pub struct Floats { - /// a: f64, - /// b: u8, - /// c: f64, - /// } - /// ``` - /// - /// This will produce: - /// - /// ```text - /// warning: repr(C) does not follow the power alignment rule. This may affect platform C ABI compatibility for this type - /// --> :5:3 - /// | - /// 5 | c: f64, - /// | ^^^^^^ - /// | - /// = note: `#[warn(uses_power_alignment)]` on by default - /// ``` - /// - /// ### Explanation - /// - /// The power alignment rule specifies that the above struct has the - /// following alignment: - /// - offset_of!(Floats, a) == 0 - /// - offset_of!(Floats, b) == 8 - /// - offset_of!(Floats, c) == 12 - /// - /// However, Rust currently aligns `c` at `offset_of!(Floats, c) == 16`. - /// Using offset 12 would be unsound since `f64` generally must be 8-aligned on this target. - /// Thus, a warning is produced for the above struct. - USES_POWER_ALIGNMENT, - Warn, - "Structs do not follow the power alignment rule under repr(C)" -} - -declare_lint_pass!(ImproperCTypesDefinitions => [IMPROPER_CTYPES_DEFINITIONS, USES_POWER_ALIGNMENT]); - -#[derive(Clone, Copy)] -pub(crate) enum CItemKind { - Declaration, - Definition, -} - -struct ImproperCTypesVisitor<'a, 'tcx> { - cx: &'a LateContext<'tcx>, - mode: CItemKind, -} - -/// Accumulator for recursive ffi type checking -struct CTypesVisitorState<'tcx> { - cache: FxHashSet>, - /// The original type being checked, before we recursed - /// to any other types it contains. - base_ty: Ty<'tcx>, -} - -enum FfiResult<'tcx> { - FfiSafe, - FfiPhantom(Ty<'tcx>), - FfiUnsafe { ty: Ty<'tcx>, reason: DiagMessage, help: Option }, -} - pub(crate) fn nonnull_optimization_guaranteed<'tcx>( tcx: TyCtxt<'tcx>, def: ty::AdtDef<'tcx>, @@ -855,14 +710,13 @@ fn ty_is_known_nonnull<'tcx>( tcx: TyCtxt<'tcx>, typing_env: ty::TypingEnv<'tcx>, ty: Ty<'tcx>, - mode: CItemKind, ) -> bool { let ty = tcx.try_normalize_erasing_regions(typing_env, ty).unwrap_or(ty); match ty.kind() { ty::FnPtr(..) => true, ty::Ref(..) => true, - ty::Adt(def, _) if def.is_box() && matches!(mode, CItemKind::Definition) => true, + ty::Adt(def, _) if def.is_box() => true, ty::Adt(def, args) if def.repr().transparent() && !def.is_union() => { let marked_non_null = nonnull_optimization_guaranteed(tcx, *def); @@ -878,10 +732,10 @@ fn ty_is_known_nonnull<'tcx>( def.variants() .iter() .filter_map(|variant| transparent_newtype_field(tcx, variant)) - .any(|field| ty_is_known_nonnull(tcx, typing_env, field.ty(tcx, args), mode)) + .any(|field| ty_is_known_nonnull(tcx, typing_env, field.ty(tcx, args))) } ty::Pat(base, pat) => { - ty_is_known_nonnull(tcx, typing_env, *base, mode) + ty_is_known_nonnull(tcx, typing_env, *base) || pat_ty_is_known_nonnull(tcx, typing_env, *pat) } _ => false, @@ -992,7 +846,6 @@ pub(crate) fn repr_nullable_ptr<'tcx>( tcx: TyCtxt<'tcx>, typing_env: ty::TypingEnv<'tcx>, ty: Ty<'tcx>, - ckind: CItemKind, ) -> Option> { debug!("is_repr_nullable_ptr(tcx, ty = {:?})", ty); match ty.kind() { @@ -1017,7 +870,7 @@ pub(crate) fn repr_nullable_ptr<'tcx>( _ => return None, }; - if !ty_is_known_nonnull(tcx, typing_env, field_ty, ckind) { + if !ty_is_known_nonnull(tcx, typing_env, field_ty) { return None; } @@ -1076,710 +929,6 @@ fn get_nullable_type_from_pat<'tcx>( } } -impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> { - /// Check if the type is array and emit an unsafe type lint. - fn check_for_array_ty(&mut self, sp: Span, ty: Ty<'tcx>) -> bool { - if let ty::Array(..) = ty.kind() { - self.emit_ffi_unsafe_type_lint( - ty, - sp, - fluent::lint_improper_ctypes_array_reason, - Some(fluent::lint_improper_ctypes_array_help), - ); - true - } else { - false - } - } - - /// Checks if the given field's type is "ffi-safe". - fn check_field_type_for_ffi( - &self, - acc: &mut CTypesVisitorState<'tcx>, - field: &ty::FieldDef, - args: GenericArgsRef<'tcx>, - ) -> FfiResult<'tcx> { - let field_ty = field.ty(self.cx.tcx, args); - let field_ty = self - .cx - .tcx - .try_normalize_erasing_regions(self.cx.typing_env(), field_ty) - .unwrap_or(field_ty); - self.check_type_for_ffi(acc, field_ty) - } - - /// Checks if the given `VariantDef`'s field types are "ffi-safe". - fn check_variant_for_ffi( - &self, - acc: &mut CTypesVisitorState<'tcx>, - ty: Ty<'tcx>, - def: ty::AdtDef<'tcx>, - variant: &ty::VariantDef, - args: GenericArgsRef<'tcx>, - ) -> FfiResult<'tcx> { - use FfiResult::*; - let transparent_with_all_zst_fields = if def.repr().transparent() { - if let Some(field) = transparent_newtype_field(self.cx.tcx, variant) { - // Transparent newtypes have at most one non-ZST field which needs to be checked.. - match self.check_field_type_for_ffi(acc, field, args) { - FfiUnsafe { ty, .. } if ty.is_unit() => (), - r => return r, - } - - false - } else { - // ..or have only ZST fields, which is FFI-unsafe (unless those fields are all - // `PhantomData`). - true - } - } else { - false - }; - - // We can't completely trust `repr(C)` markings, so make sure the fields are actually safe. - let mut all_phantom = !variant.fields.is_empty(); - for field in &variant.fields { - all_phantom &= match self.check_field_type_for_ffi(acc, field, args) { - FfiSafe => false, - // `()` fields are FFI-safe! - FfiUnsafe { ty, .. } if ty.is_unit() => false, - FfiPhantom(..) => true, - r @ FfiUnsafe { .. } => return r, - } - } - - if all_phantom { - FfiPhantom(ty) - } else if transparent_with_all_zst_fields { - FfiUnsafe { ty, reason: fluent::lint_improper_ctypes_struct_zst, help: None } - } else { - FfiSafe - } - } - - /// Checks if the given type is "ffi-safe" (has a stable, well-defined - /// representation which can be exported to C code). - fn check_type_for_ffi( - &self, - acc: &mut CTypesVisitorState<'tcx>, - ty: Ty<'tcx>, - ) -> FfiResult<'tcx> { - use FfiResult::*; - - let tcx = self.cx.tcx; - - // Protect against infinite recursion, for example - // `struct S(*mut S);`. - // FIXME: A recursion limit is necessary as well, for irregular - // recursive types. - if !acc.cache.insert(ty) { - return FfiSafe; - } - - match *ty.kind() { - ty::Adt(def, args) => { - if let Some(boxed) = ty.boxed_ty() - && matches!(self.mode, CItemKind::Definition) - { - if boxed.is_sized(tcx, self.cx.typing_env()) { - return FfiSafe; - } else { - return FfiUnsafe { - ty, - reason: fluent::lint_improper_ctypes_box, - help: None, - }; - } - } - if def.is_phantom_data() { - return FfiPhantom(ty); - } - match def.adt_kind() { - AdtKind::Struct | AdtKind::Union => { - if let Some(sym::cstring_type | sym::cstr_type) = - tcx.get_diagnostic_name(def.did()) - && !acc.base_ty.is_mutable_ptr() - { - return FfiUnsafe { - ty, - reason: fluent::lint_improper_ctypes_cstr_reason, - help: Some(fluent::lint_improper_ctypes_cstr_help), - }; - } - - if !def.repr().c() && !def.repr().transparent() { - return FfiUnsafe { - ty, - reason: if def.is_struct() { - fluent::lint_improper_ctypes_struct_layout_reason - } else { - fluent::lint_improper_ctypes_union_layout_reason - }, - help: if def.is_struct() { - Some(fluent::lint_improper_ctypes_struct_layout_help) - } else { - Some(fluent::lint_improper_ctypes_union_layout_help) - }, - }; - } - - if def.non_enum_variant().field_list_has_applicable_non_exhaustive() { - return FfiUnsafe { - ty, - reason: if def.is_struct() { - fluent::lint_improper_ctypes_struct_non_exhaustive - } else { - fluent::lint_improper_ctypes_union_non_exhaustive - }, - help: None, - }; - } - - if def.non_enum_variant().fields.is_empty() { - return FfiUnsafe { - ty, - reason: if def.is_struct() { - fluent::lint_improper_ctypes_struct_fieldless_reason - } else { - fluent::lint_improper_ctypes_union_fieldless_reason - }, - help: if def.is_struct() { - Some(fluent::lint_improper_ctypes_struct_fieldless_help) - } else { - Some(fluent::lint_improper_ctypes_union_fieldless_help) - }, - }; - } - - self.check_variant_for_ffi(acc, ty, def, def.non_enum_variant(), args) - } - AdtKind::Enum => { - if def.variants().is_empty() { - // Empty enums are okay... although sort of useless. - return FfiSafe; - } - // Check for a repr() attribute to specify the size of the - // discriminant. - if !def.repr().c() && !def.repr().transparent() && def.repr().int.is_none() - { - // Special-case types like `Option` and `Result` - if let Some(ty) = - repr_nullable_ptr(self.cx.tcx, self.cx.typing_env(), ty, self.mode) - { - return self.check_type_for_ffi(acc, ty); - } - - return FfiUnsafe { - ty, - reason: fluent::lint_improper_ctypes_enum_repr_reason, - help: Some(fluent::lint_improper_ctypes_enum_repr_help), - }; - } - - use improper_ctypes::check_non_exhaustive_variant; - - let non_exhaustive = def.variant_list_has_applicable_non_exhaustive(); - // Check the contained variants. - let ret = def.variants().iter().try_for_each(|variant| { - check_non_exhaustive_variant(non_exhaustive, variant) - .map_break(|reason| FfiUnsafe { ty, reason, help: None })?; - - match self.check_variant_for_ffi(acc, ty, def, variant, args) { - FfiSafe => ControlFlow::Continue(()), - r => ControlFlow::Break(r), - } - }); - if let ControlFlow::Break(result) = ret { - return result; - } - - FfiSafe - } - } - } - - ty::Char => FfiUnsafe { - ty, - reason: fluent::lint_improper_ctypes_char_reason, - help: Some(fluent::lint_improper_ctypes_char_help), - }, - - // It's just extra invariants on the type that you need to uphold, - // but only the base type is relevant for being representable in FFI. - ty::Pat(base, ..) => self.check_type_for_ffi(acc, base), - - // Primitive types with a stable representation. - ty::Bool | ty::Int(..) | ty::Uint(..) | ty::Float(..) | ty::Never => FfiSafe, - - ty::Slice(_) => FfiUnsafe { - ty, - reason: fluent::lint_improper_ctypes_slice_reason, - help: Some(fluent::lint_improper_ctypes_slice_help), - }, - - ty::Dynamic(..) => { - FfiUnsafe { ty, reason: fluent::lint_improper_ctypes_dyn, help: None } - } - - ty::Str => FfiUnsafe { - ty, - reason: fluent::lint_improper_ctypes_str_reason, - help: Some(fluent::lint_improper_ctypes_str_help), - }, - - ty::Tuple(..) => FfiUnsafe { - ty, - reason: fluent::lint_improper_ctypes_tuple_reason, - help: Some(fluent::lint_improper_ctypes_tuple_help), - }, - - ty::RawPtr(ty, _) | ty::Ref(_, ty, _) - if { - matches!(self.mode, CItemKind::Definition) - && ty.is_sized(self.cx.tcx, self.cx.typing_env()) - } => - { - FfiSafe - } - - ty::RawPtr(ty, _) - if match ty.kind() { - ty::Tuple(tuple) => tuple.is_empty(), - _ => false, - } => - { - FfiSafe - } - - ty::RawPtr(ty, _) | ty::Ref(_, ty, _) => self.check_type_for_ffi(acc, ty), - - ty::Array(inner_ty, _) => self.check_type_for_ffi(acc, inner_ty), - - ty::FnPtr(sig_tys, hdr) => { - let sig = sig_tys.with(hdr); - if sig.abi().is_rustic_abi() { - return FfiUnsafe { - ty, - reason: fluent::lint_improper_ctypes_fnptr_reason, - help: Some(fluent::lint_improper_ctypes_fnptr_help), - }; - } - - let sig = tcx.instantiate_bound_regions_with_erased(sig); - for arg in sig.inputs() { - match self.check_type_for_ffi(acc, *arg) { - FfiSafe => {} - r => return r, - } - } - - let ret_ty = sig.output(); - if ret_ty.is_unit() { - return FfiSafe; - } - - self.check_type_for_ffi(acc, ret_ty) - } - - ty::Foreign(..) => FfiSafe, - - // While opaque types are checked for earlier, if a projection in a struct field - // normalizes to an opaque type, then it will reach this branch. - ty::Alias(ty::Opaque, ..) => { - FfiUnsafe { ty, reason: fluent::lint_improper_ctypes_opaque, help: None } - } - - // `extern "C" fn` functions can have type parameters, which may or may not be FFI-safe, - // so they are currently ignored for the purposes of this lint. - ty::Param(..) | ty::Alias(ty::Projection | ty::Inherent, ..) - if matches!(self.mode, CItemKind::Definition) => - { - FfiSafe - } - - ty::UnsafeBinder(_) => todo!("FIXME(unsafe_binder)"), - - ty::Param(..) - | ty::Alias(ty::Projection | ty::Inherent | ty::Free, ..) - | ty::Infer(..) - | ty::Bound(..) - | ty::Error(_) - | ty::Closure(..) - | ty::CoroutineClosure(..) - | ty::Coroutine(..) - | ty::CoroutineWitness(..) - | ty::Placeholder(..) - | ty::FnDef(..) => bug!("unexpected type in foreign function: {:?}", ty), - } - } - - fn emit_ffi_unsafe_type_lint( - &mut self, - ty: Ty<'tcx>, - sp: Span, - note: DiagMessage, - help: Option, - ) { - let lint = match self.mode { - CItemKind::Declaration => IMPROPER_CTYPES, - CItemKind::Definition => IMPROPER_CTYPES_DEFINITIONS, - }; - let desc = match self.mode { - CItemKind::Declaration => "block", - CItemKind::Definition => "fn", - }; - let span_note = if let ty::Adt(def, _) = ty.kind() - && let Some(sp) = self.cx.tcx.hir_span_if_local(def.did()) - { - Some(sp) - } else { - None - }; - self.cx.emit_span_lint( - lint, - sp, - ImproperCTypes { ty, desc, label: sp, help, note, span_note }, - ); - } - - fn check_for_opaque_ty(&mut self, sp: Span, ty: Ty<'tcx>) -> bool { - struct ProhibitOpaqueTypes; - impl<'tcx> ty::TypeVisitor> for ProhibitOpaqueTypes { - type Result = ControlFlow>; - - fn visit_ty(&mut self, ty: Ty<'tcx>) -> Self::Result { - if !ty.has_opaque_types() { - return ControlFlow::Continue(()); - } - - if let ty::Alias(ty::Opaque, ..) = ty.kind() { - ControlFlow::Break(ty) - } else { - ty.super_visit_with(self) - } - } - } - - if let Some(ty) = self - .cx - .tcx - .try_normalize_erasing_regions(self.cx.typing_env(), ty) - .unwrap_or(ty) - .visit_with(&mut ProhibitOpaqueTypes) - .break_value() - { - self.emit_ffi_unsafe_type_lint(ty, sp, fluent::lint_improper_ctypes_opaque, None); - true - } else { - false - } - } - - fn check_type_for_ffi_and_report_errors( - &mut self, - sp: Span, - ty: Ty<'tcx>, - is_static: bool, - is_return_type: bool, - ) { - if self.check_for_opaque_ty(sp, ty) { - // We've already emitted an error due to an opaque type. - return; - } - - let ty = self.cx.tcx.try_normalize_erasing_regions(self.cx.typing_env(), ty).unwrap_or(ty); - - // C doesn't really support passing arrays by value - the only way to pass an array by value - // is through a struct. So, first test that the top level isn't an array, and then - // recursively check the types inside. - if !is_static && self.check_for_array_ty(sp, ty) { - return; - } - - // Don't report FFI errors for unit return types. This check exists here, and not in - // the caller (where it would make more sense) so that normalization has definitely - // happened. - if is_return_type && ty.is_unit() { - return; - } - - let mut acc = CTypesVisitorState { cache: FxHashSet::default(), base_ty: ty }; - match self.check_type_for_ffi(&mut acc, ty) { - FfiResult::FfiSafe => {} - FfiResult::FfiPhantom(ty) => { - self.emit_ffi_unsafe_type_lint( - ty, - sp, - fluent::lint_improper_ctypes_only_phantomdata, - None, - ); - } - FfiResult::FfiUnsafe { ty, reason, help } => { - self.emit_ffi_unsafe_type_lint(ty, sp, reason, help); - } - } - } - - /// Check if a function's argument types and result type are "ffi-safe". - /// - /// For a external ABI function, argument types and the result type are walked to find fn-ptr - /// types that have external ABIs, as these still need checked. - fn check_fn(&mut self, def_id: LocalDefId, decl: &'tcx hir::FnDecl<'_>) { - let sig = self.cx.tcx.fn_sig(def_id).instantiate_identity(); - let sig = self.cx.tcx.instantiate_bound_regions_with_erased(sig); - - for (input_ty, input_hir) in iter::zip(sig.inputs(), decl.inputs) { - for (fn_ptr_ty, span) in self.find_fn_ptr_ty_with_external_abi(input_hir, *input_ty) { - self.check_type_for_ffi_and_report_errors(span, fn_ptr_ty, false, false); - } - } - - if let hir::FnRetTy::Return(ret_hir) = decl.output { - for (fn_ptr_ty, span) in self.find_fn_ptr_ty_with_external_abi(ret_hir, sig.output()) { - self.check_type_for_ffi_and_report_errors(span, fn_ptr_ty, false, true); - } - } - } - - /// Check if a function's argument types and result type are "ffi-safe". - fn check_foreign_fn(&mut self, def_id: LocalDefId, decl: &'tcx hir::FnDecl<'_>) { - let sig = self.cx.tcx.fn_sig(def_id).instantiate_identity(); - let sig = self.cx.tcx.instantiate_bound_regions_with_erased(sig); - - for (input_ty, input_hir) in iter::zip(sig.inputs(), decl.inputs) { - self.check_type_for_ffi_and_report_errors(input_hir.span, *input_ty, false, false); - } - - if let hir::FnRetTy::Return(ret_hir) = decl.output { - self.check_type_for_ffi_and_report_errors(ret_hir.span, sig.output(), false, true); - } - } - - fn check_foreign_static(&mut self, id: hir::OwnerId, span: Span) { - let ty = self.cx.tcx.type_of(id).instantiate_identity(); - self.check_type_for_ffi_and_report_errors(span, ty, true, false); - } - - /// Find any fn-ptr types with external ABIs in `ty`. - /// - /// For example, `Option` returns `extern "C" fn()` - fn find_fn_ptr_ty_with_external_abi( - &self, - hir_ty: &hir::Ty<'tcx>, - ty: Ty<'tcx>, - ) -> Vec<(Ty<'tcx>, Span)> { - struct FnPtrFinder<'tcx> { - spans: Vec, - tys: Vec>, - } - - impl<'tcx> hir::intravisit::Visitor<'_> for FnPtrFinder<'tcx> { - fn visit_ty(&mut self, ty: &'_ hir::Ty<'_, AmbigArg>) { - debug!(?ty); - if let hir::TyKind::FnPtr(hir::FnPtrTy { abi, .. }) = ty.kind - && !abi.is_rustic_abi() - { - self.spans.push(ty.span); - } - - hir::intravisit::walk_ty(self, ty) - } - } - - impl<'tcx> ty::TypeVisitor> for FnPtrFinder<'tcx> { - type Result = (); - - fn visit_ty(&mut self, ty: Ty<'tcx>) -> Self::Result { - if let ty::FnPtr(_, hdr) = ty.kind() - && !hdr.abi.is_rustic_abi() - { - self.tys.push(ty); - } - - ty.super_visit_with(self) - } - } - - let mut visitor = FnPtrFinder { spans: Vec::new(), tys: Vec::new() }; - ty.visit_with(&mut visitor); - visitor.visit_ty_unambig(hir_ty); - - iter::zip(visitor.tys.drain(..), visitor.spans.drain(..)).collect() - } -} - -impl<'tcx> LateLintPass<'tcx> for ImproperCTypesDeclarations { - fn check_foreign_item(&mut self, cx: &LateContext<'tcx>, it: &hir::ForeignItem<'tcx>) { - let mut vis = ImproperCTypesVisitor { cx, mode: CItemKind::Declaration }; - let abi = cx.tcx.hir_get_foreign_abi(it.hir_id()); - - match it.kind { - hir::ForeignItemKind::Fn(sig, _, _) => { - if abi.is_rustic_abi() { - vis.check_fn(it.owner_id.def_id, sig.decl) - } else { - vis.check_foreign_fn(it.owner_id.def_id, sig.decl); - } - } - hir::ForeignItemKind::Static(ty, _, _) if !abi.is_rustic_abi() => { - vis.check_foreign_static(it.owner_id, ty.span); - } - hir::ForeignItemKind::Static(..) | hir::ForeignItemKind::Type => (), - } - } -} - -impl ImproperCTypesDefinitions { - fn check_ty_maybe_containing_foreign_fnptr<'tcx>( - &mut self, - cx: &LateContext<'tcx>, - hir_ty: &'tcx hir::Ty<'_>, - ty: Ty<'tcx>, - ) { - let mut vis = ImproperCTypesVisitor { cx, mode: CItemKind::Definition }; - for (fn_ptr_ty, span) in vis.find_fn_ptr_ty_with_external_abi(hir_ty, ty) { - vis.check_type_for_ffi_and_report_errors(span, fn_ptr_ty, true, false); - } - } - - fn check_arg_for_power_alignment<'tcx>( - &mut self, - cx: &LateContext<'tcx>, - ty: Ty<'tcx>, - ) -> bool { - assert!(cx.tcx.sess.target.os == "aix"); - // Structs (under repr(C)) follow the power alignment rule if: - // - the first field of the struct is a floating-point type that - // is greater than 4-bytes, or - // - the first field of the struct is an aggregate whose - // recursively first field is a floating-point type greater than - // 4 bytes. - if ty.is_floating_point() && ty.primitive_size(cx.tcx).bytes() > 4 { - return true; - } else if let Adt(adt_def, _) = ty.kind() - && adt_def.is_struct() - && adt_def.repr().c() - && !adt_def.repr().packed() - && adt_def.repr().align.is_none() - { - let struct_variant = adt_def.variant(VariantIdx::ZERO); - // Within a nested struct, all fields are examined to correctly - // report if any fields after the nested struct within the - // original struct are misaligned. - for struct_field in &struct_variant.fields { - let field_ty = cx.tcx.type_of(struct_field.did).instantiate_identity(); - if self.check_arg_for_power_alignment(cx, field_ty) { - return true; - } - } - } - return false; - } - - fn check_struct_for_power_alignment<'tcx>( - &mut self, - cx: &LateContext<'tcx>, - item: &'tcx hir::Item<'tcx>, - ) { - let adt_def = cx.tcx.adt_def(item.owner_id.to_def_id()); - // repr(C) structs also with packed or aligned representation - // should be ignored. - if adt_def.repr().c() - && !adt_def.repr().packed() - && adt_def.repr().align.is_none() - && cx.tcx.sess.target.os == "aix" - && !adt_def.all_fields().next().is_none() - { - let struct_variant_data = item.expect_struct().2; - for field_def in struct_variant_data.fields().iter().skip(1) { - // Struct fields (after the first field) are checked for the - // power alignment rule, as fields after the first are likely - // to be the fields that are misaligned. - let def_id = field_def.def_id; - let ty = cx.tcx.type_of(def_id).instantiate_identity(); - if self.check_arg_for_power_alignment(cx, ty) { - cx.emit_span_lint(USES_POWER_ALIGNMENT, field_def.span, UsesPowerAlignment); - } - } - } - } -} - -/// `ImproperCTypesDefinitions` checks items outside of foreign items (e.g. stuff that isn't in -/// `extern "C" { }` blocks): -/// -/// - `extern "" fn` definitions are checked in the same way as the -/// `ImproperCtypesDeclarations` visitor checks functions if `` is external (e.g. "C"). -/// - All other items which contain types (e.g. other functions, struct definitions, etc) are -/// checked for extern fn-ptrs with external ABIs. -impl<'tcx> LateLintPass<'tcx> for ImproperCTypesDefinitions { - fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'tcx>) { - match item.kind { - hir::ItemKind::Static(_, _, ty, _) - | hir::ItemKind::Const(_, _, ty, _) - | hir::ItemKind::TyAlias(_, _, ty) => { - self.check_ty_maybe_containing_foreign_fnptr( - cx, - ty, - cx.tcx.type_of(item.owner_id).instantiate_identity(), - ); - } - // See `check_fn`.. - hir::ItemKind::Fn { .. } => {} - // Structs are checked based on if they follow the power alignment - // rule (under repr(C)). - hir::ItemKind::Struct(..) => { - self.check_struct_for_power_alignment(cx, item); - } - // See `check_field_def`.. - hir::ItemKind::Union(..) | hir::ItemKind::Enum(..) => {} - // Doesn't define something that can contain a external type to be checked. - hir::ItemKind::Impl(..) - | hir::ItemKind::TraitAlias(..) - | hir::ItemKind::Trait(..) - | hir::ItemKind::GlobalAsm { .. } - | hir::ItemKind::ForeignMod { .. } - | hir::ItemKind::Mod(..) - | hir::ItemKind::Macro(..) - | hir::ItemKind::Use(..) - | hir::ItemKind::ExternCrate(..) => {} - } - } - - fn check_field_def(&mut self, cx: &LateContext<'tcx>, field: &'tcx hir::FieldDef<'tcx>) { - self.check_ty_maybe_containing_foreign_fnptr( - cx, - field.ty, - cx.tcx.type_of(field.def_id).instantiate_identity(), - ); - } - - fn check_fn( - &mut self, - cx: &LateContext<'tcx>, - kind: hir::intravisit::FnKind<'tcx>, - decl: &'tcx hir::FnDecl<'_>, - _: &'tcx hir::Body<'_>, - _: Span, - id: LocalDefId, - ) { - use hir::intravisit::FnKind; - - let abi = match kind { - FnKind::ItemFn(_, _, header, ..) => header.abi, - FnKind::Method(_, sig, ..) => sig.header.abi, - _ => return, - }; - - let mut vis = ImproperCTypesVisitor { cx, mode: CItemKind::Definition }; - if abi.is_rustic_abi() { - vis.check_fn(id, decl); - } else { - vis.check_foreign_fn(id, decl); - } - } -} - declare_lint_pass!(VariantSizeDifferences => [VARIANT_SIZE_DIFFERENCES]); impl<'tcx> LateLintPass<'tcx> for VariantSizeDifferences { diff --git a/compiler/rustc_lint/src/types/improper_ctypes.rs b/compiler/rustc_lint/src/types/improper_ctypes.rs index 13afa540afcf..7ca57b0094ee 100644 --- a/compiler/rustc_lint/src/types/improper_ctypes.rs +++ b/compiler/rustc_lint/src/types/improper_ctypes.rs @@ -1,10 +1,141 @@ +use std::iter; use std::ops::ControlFlow; +use bitflags::bitflags; +use rustc_abi::VariantIdx; +use rustc_data_structures::fx::FxHashSet; use rustc_errors::DiagMessage; use rustc_hir::def::CtorKind; -use rustc_middle::ty; +use rustc_hir::intravisit::VisitorExt; +use rustc_hir::{self as hir, AmbigArg}; +use rustc_middle::bug; +use rustc_middle::ty::{ + self, Adt, AdtDef, AdtKind, GenericArgsRef, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, + TypeVisitableExt, +}; +use rustc_session::{declare_lint, declare_lint_pass}; +use rustc_span::def_id::LocalDefId; +use rustc_span::{Span, sym}; +use tracing::debug; -use crate::fluent_generated as fluent; +use super::repr_nullable_ptr; +use crate::lints::{ImproperCTypes, UsesPowerAlignment}; +use crate::{LateContext, LateLintPass, LintContext, fluent_generated as fluent}; + +declare_lint! { + /// The `improper_ctypes` lint detects incorrect use of types in foreign + /// modules. + /// + /// ### Example + /// + /// ```rust + /// unsafe extern "C" { + /// static STATIC: String; + /// } + /// ``` + /// + /// {{produces}} + /// + /// ### Explanation + /// + /// The compiler has several checks to verify that types used in `extern` + /// blocks are safe and follow certain rules to ensure proper + /// compatibility with the foreign interfaces. This lint is issued when it + /// detects a probable mistake in a definition. The lint usually should + /// provide a description of the issue, along with possibly a hint on how + /// to resolve it. + IMPROPER_CTYPES, + Warn, + "proper use of libc types in foreign modules" +} + +declare_lint! { + /// The `improper_ctypes_definitions` lint detects incorrect use of + /// [`extern` function] definitions. + /// + /// [`extern` function]: https://doc.rust-lang.org/reference/items/functions.html#extern-function-qualifier + /// + /// ### Example + /// + /// ```rust + /// # #![allow(unused)] + /// pub extern "C" fn str_type(p: &str) { } + /// ``` + /// + /// {{produces}} + /// + /// ### Explanation + /// + /// There are many parameter and return types that may be specified in an + /// `extern` function that are not compatible with the given ABI. This + /// lint is an alert that these types should not be used. The lint usually + /// should provide a description of the issue, along with possibly a hint + /// on how to resolve it. + IMPROPER_CTYPES_DEFINITIONS, + Warn, + "proper use of libc types in foreign item definitions" +} + +declare_lint! { + /// The `uses_power_alignment` lint detects specific `repr(C)` + /// aggregates on AIX. + /// In its platform C ABI, AIX uses the "power" (as in PowerPC) alignment + /// rule (detailed in https://www.ibm.com/docs/en/xl-c-and-cpp-aix/16.1?topic=data-using-alignment-modes#alignment), + /// which can also be set for XLC by `#pragma align(power)` or + /// `-qalign=power`. Aggregates with a floating-point type as the + /// recursively first field (as in "at offset 0") modify the layout of + /// *subsequent* fields of the associated structs to use an alignment value + /// where the floating-point type is aligned on a 4-byte boundary. + /// + /// Effectively, subsequent floating-point fields act as-if they are `repr(packed(4))`. This + /// would be unsound to do in a `repr(C)` type without all the restrictions that come with + /// `repr(packed)`. Rust instead chooses a layout that maintains soundness of Rust code, at the + /// expense of incompatibility with C code. + /// + /// ### Example + /// + /// ```rust,ignore (fails on non-powerpc64-ibm-aix) + /// #[repr(C)] + /// pub struct Floats { + /// a: f64, + /// b: u8, + /// c: f64, + /// } + /// ``` + /// + /// This will produce: + /// + /// ```text + /// warning: repr(C) does not follow the power alignment rule. This may affect platform C ABI compatibility for this type + /// --> :5:3 + /// | + /// 5 | c: f64, + /// | ^^^^^^ + /// | + /// = note: `#[warn(uses_power_alignment)]` on by default + /// ``` + /// + /// ### Explanation + /// + /// The power alignment rule specifies that the above struct has the + /// following alignment: + /// - offset_of!(Floats, a) == 0 + /// - offset_of!(Floats, b) == 8 + /// - offset_of!(Floats, c) == 12 + /// + /// However, Rust currently aligns `c` at `offset_of!(Floats, c) == 16`. + /// Using offset 12 would be unsound since `f64` generally must be 8-aligned on this target. + /// Thus, a warning is produced for the above struct. + USES_POWER_ALIGNMENT, + Warn, + "Structs do not follow the power alignment rule under repr(C)" +} + +declare_lint_pass!(ImproperCTypesLint => [ + IMPROPER_CTYPES, + IMPROPER_CTYPES_DEFINITIONS, + USES_POWER_ALIGNMENT +]); /// Check a variant of a non-exhaustive enum for improper ctypes /// @@ -41,3 +172,884 @@ fn variant_has_complex_ctor(variant: &ty::VariantDef) -> bool { // CtorKind::Const means a "unit" ctor !matches!(variant.ctor_kind(), Some(CtorKind::Const)) } + +/// Per-struct-field function that checks if a struct definition follows +/// the Power alignment Rule (see the `check_struct_for_power_alignment` function). +fn check_arg_for_power_alignment<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> bool { + let tcx = cx.tcx; + assert!(tcx.sess.target.os == "aix"); + // Structs (under repr(C)) follow the power alignment rule if: + // - the first field of the struct is a floating-point type that + // is greater than 4-bytes, or + // - the first field of the struct is an aggregate whose + // recursively first field is a floating-point type greater than + // 4 bytes. + if ty.is_floating_point() && ty.primitive_size(tcx).bytes() > 4 { + return true; + } else if let Adt(adt_def, _) = ty.kind() + && adt_def.is_struct() + && adt_def.repr().c() + && !adt_def.repr().packed() + && adt_def.repr().align.is_none() + { + let struct_variant = adt_def.variant(VariantIdx::ZERO); + // Within a nested struct, all fields are examined to correctly + // report if any fields after the nested struct within the + // original struct are misaligned. + for struct_field in &struct_variant.fields { + let field_ty = tcx.type_of(struct_field.did).instantiate_identity(); + if check_arg_for_power_alignment(cx, field_ty) { + return true; + } + } + } + return false; +} + +/// Check a struct definition for respect of the Power alignment Rule (as in PowerPC), +/// which should be respected in the "aix" target OS. +/// To do so, we must follow one of the two following conditions: +/// - The first field of the struct must be floating-point type that +/// is greater than 4-bytes. +/// - The first field of the struct must be an aggregate whose +/// recursively first field is a floating-point type greater than +/// 4 bytes. +fn check_struct_for_power_alignment<'tcx>( + cx: &LateContext<'tcx>, + item: &'tcx hir::Item<'tcx>, + adt_def: AdtDef<'tcx>, +) { + let tcx = cx.tcx; + // repr(C) structs also with packed or aligned representation + // should be ignored. + if adt_def.repr().c() + && !adt_def.repr().packed() + && adt_def.repr().align.is_none() + && tcx.sess.target.os == "aix" + && !adt_def.all_fields().next().is_none() + { + let struct_variant_data = item.expect_struct().2; + for field_def in struct_variant_data.fields().iter().skip(1) { + // Struct fields (after the first field) are checked for the + // power alignment rule, as fields after the first are likely + // to be the fields that are misaligned. + let def_id = field_def.def_id; + let ty = tcx.type_of(def_id).instantiate_identity(); + if check_arg_for_power_alignment(cx, ty) { + cx.emit_span_lint(USES_POWER_ALIGNMENT, field_def.span, UsesPowerAlignment); + } + } + } +} + +#[derive(Clone, Copy)] +enum CItemKind { + Declaration, + Definition, +} + +enum FfiResult<'tcx> { + FfiSafe, + FfiPhantom(Ty<'tcx>), + FfiUnsafe { ty: Ty<'tcx>, reason: DiagMessage, help: Option }, +} + +/// The result when a type has been checked but perhaps not completely. `None` indicates that +/// FFI safety/unsafety has not yet been determined, `Some(res)` indicates that the safety/unsafety +/// in the `FfiResult` is final. +type PartialFfiResult<'tcx> = Option>; + +bitflags! { + #[derive(Clone, Copy, Debug, PartialEq, Eq)] + struct VisitorState: u8 { + /// For use in (externally-linked) static variables. + const STATIC = 0b000001; + /// For use in functions in general. + const FUNC = 0b000010; + /// For variables in function returns (implicitly: not for static variables). + const FN_RETURN = 0b000100; + /// For variables in functions/variables which are defined in rust. + const DEFINED = 0b001000; + /// For times where we are only defining the type of something + /// (struct/enum/union definitions, FnPtrs). + const THEORETICAL = 0b010000; + } +} + +impl VisitorState { + // The values that can be set. + const STATIC_TY: Self = Self::STATIC; + const ARGUMENT_TY_IN_DEFINITION: Self = + Self::from_bits(Self::FUNC.bits() | Self::DEFINED.bits()).unwrap(); + const RETURN_TY_IN_DEFINITION: Self = + Self::from_bits(Self::FUNC.bits() | Self::FN_RETURN.bits() | Self::DEFINED.bits()).unwrap(); + const ARGUMENT_TY_IN_DECLARATION: Self = Self::FUNC; + const RETURN_TY_IN_DECLARATION: Self = + Self::from_bits(Self::FUNC.bits() | Self::FN_RETURN.bits()).unwrap(); + const ARGUMENT_TY_IN_FNPTR: Self = + Self::from_bits(Self::FUNC.bits() | Self::THEORETICAL.bits()).unwrap(); + const RETURN_TY_IN_FNPTR: Self = + Self::from_bits(Self::FUNC.bits() | Self::THEORETICAL.bits() | Self::FN_RETURN.bits()) + .unwrap(); + + /// Get the proper visitor state for a given function's arguments. + fn argument_from_fnmode(fn_mode: CItemKind) -> Self { + match fn_mode { + CItemKind::Definition => VisitorState::ARGUMENT_TY_IN_DEFINITION, + CItemKind::Declaration => VisitorState::ARGUMENT_TY_IN_DECLARATION, + } + } + + /// Get the proper visitor state for a given function's return type. + fn return_from_fnmode(fn_mode: CItemKind) -> Self { + match fn_mode { + CItemKind::Definition => VisitorState::RETURN_TY_IN_DEFINITION, + CItemKind::Declaration => VisitorState::RETURN_TY_IN_DECLARATION, + } + } + + /// Whether the type is used in a function. + fn is_in_function(self) -> bool { + let ret = self.contains(Self::FUNC); + if ret { + debug_assert!(!self.contains(Self::STATIC)); + } + ret + } + /// Whether the type is used (directly or not) in a function, in return position. + fn is_in_function_return(self) -> bool { + let ret = self.contains(Self::FN_RETURN); + if ret { + debug_assert!(self.is_in_function()); + } + ret + } + /// Whether the type is used (directly or not) in a defined function. + /// In other words, whether or not we allow non-FFI-safe types behind a C pointer, + /// to be treated as an opaque type on the other side of the FFI boundary. + fn is_in_defined_function(self) -> bool { + self.contains(Self::DEFINED) && self.is_in_function() + } + + /// Whether the type is used (directly or not) in a function pointer type. + /// Here, we also allow non-FFI-safe types behind a C pointer, + /// to be treated as an opaque type on the other side of the FFI boundary. + fn is_in_fnptr(self) -> bool { + self.contains(Self::THEORETICAL) && self.is_in_function() + } + + /// Whether we can expect type parameters and co in a given type. + fn can_expect_ty_params(self) -> bool { + // rust-defined functions, as well as FnPtrs + self.contains(Self::THEORETICAL) || self.is_in_defined_function() + } +} + +/// Visitor used to recursively traverse MIR types and evaluate FFI-safety. +/// It uses ``check_*`` methods as entrypoints to be called elsewhere, +/// and ``visit_*`` methods to recurse. +struct ImproperCTypesVisitor<'a, 'tcx> { + cx: &'a LateContext<'tcx>, + /// To prevent problems with recursive types, + /// add a types-in-check cache. + cache: FxHashSet>, + /// The original type being checked, before we recursed + /// to any other types it contains. + base_ty: Ty<'tcx>, + base_fn_mode: CItemKind, +} + +impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> { + fn new(cx: &'a LateContext<'tcx>, base_ty: Ty<'tcx>, base_fn_mode: CItemKind) -> Self { + Self { cx, base_ty, base_fn_mode, cache: FxHashSet::default() } + } + + /// Checks if the given field's type is "ffi-safe". + fn check_field_type_for_ffi( + &mut self, + state: VisitorState, + field: &ty::FieldDef, + args: GenericArgsRef<'tcx>, + ) -> FfiResult<'tcx> { + let field_ty = field.ty(self.cx.tcx, args); + let field_ty = self + .cx + .tcx + .try_normalize_erasing_regions(self.cx.typing_env(), field_ty) + .unwrap_or(field_ty); + self.visit_type(state, field_ty) + } + + /// Checks if the given `VariantDef`'s field types are "ffi-safe". + fn check_variant_for_ffi( + &mut self, + state: VisitorState, + ty: Ty<'tcx>, + def: ty::AdtDef<'tcx>, + variant: &ty::VariantDef, + args: GenericArgsRef<'tcx>, + ) -> FfiResult<'tcx> { + use FfiResult::*; + let transparent_with_all_zst_fields = if def.repr().transparent() { + if let Some(field) = super::transparent_newtype_field(self.cx.tcx, variant) { + // Transparent newtypes have at most one non-ZST field which needs to be checked.. + match self.check_field_type_for_ffi(state, field, args) { + FfiUnsafe { ty, .. } if ty.is_unit() => (), + r => return r, + } + + false + } else { + // ..or have only ZST fields, which is FFI-unsafe (unless those fields are all + // `PhantomData`). + true + } + } else { + false + }; + + // We can't completely trust `repr(C)` markings, so make sure the fields are actually safe. + let mut all_phantom = !variant.fields.is_empty(); + for field in &variant.fields { + all_phantom &= match self.check_field_type_for_ffi(state, field, args) { + FfiSafe => false, + // `()` fields are FFI-safe! + FfiUnsafe { ty, .. } if ty.is_unit() => false, + FfiPhantom(..) => true, + r @ FfiUnsafe { .. } => return r, + } + } + + if all_phantom { + FfiPhantom(ty) + } else if transparent_with_all_zst_fields { + FfiUnsafe { ty, reason: fluent::lint_improper_ctypes_struct_zst, help: None } + } else { + FfiSafe + } + } + + /// Checks if the given type is "ffi-safe" (has a stable, well-defined + /// representation which can be exported to C code). + fn visit_type(&mut self, state: VisitorState, ty: Ty<'tcx>) -> FfiResult<'tcx> { + use FfiResult::*; + + let tcx = self.cx.tcx; + + // Protect against infinite recursion, for example + // `struct S(*mut S);`. + // FIXME: A recursion limit is necessary as well, for irregular + // recursive types. + if !self.cache.insert(ty) { + return FfiSafe; + } + + match *ty.kind() { + ty::Adt(def, args) => { + if let Some(boxed) = ty.boxed_ty() + && ( + // FIXME(ctypes): this logic is broken, but it still fits the current tests + state.is_in_defined_function() + || (state.is_in_fnptr() + && matches!(self.base_fn_mode, CItemKind::Definition)) + ) + { + if boxed.is_sized(tcx, self.cx.typing_env()) { + return FfiSafe; + } else { + return FfiUnsafe { + ty, + reason: fluent::lint_improper_ctypes_box, + help: None, + }; + } + } + if def.is_phantom_data() { + return FfiPhantom(ty); + } + match def.adt_kind() { + AdtKind::Struct | AdtKind::Union => { + if let Some(sym::cstring_type | sym::cstr_type) = + tcx.get_diagnostic_name(def.did()) + && !self.base_ty.is_mutable_ptr() + { + return FfiUnsafe { + ty, + reason: fluent::lint_improper_ctypes_cstr_reason, + help: Some(fluent::lint_improper_ctypes_cstr_help), + }; + } + + if !def.repr().c() && !def.repr().transparent() { + return FfiUnsafe { + ty, + reason: if def.is_struct() { + fluent::lint_improper_ctypes_struct_layout_reason + } else { + fluent::lint_improper_ctypes_union_layout_reason + }, + help: if def.is_struct() { + Some(fluent::lint_improper_ctypes_struct_layout_help) + } else { + Some(fluent::lint_improper_ctypes_union_layout_help) + }, + }; + } + + if def.non_enum_variant().field_list_has_applicable_non_exhaustive() { + return FfiUnsafe { + ty, + reason: if def.is_struct() { + fluent::lint_improper_ctypes_struct_non_exhaustive + } else { + fluent::lint_improper_ctypes_union_non_exhaustive + }, + help: None, + }; + } + + if def.non_enum_variant().fields.is_empty() { + return FfiUnsafe { + ty, + reason: if def.is_struct() { + fluent::lint_improper_ctypes_struct_fieldless_reason + } else { + fluent::lint_improper_ctypes_union_fieldless_reason + }, + help: if def.is_struct() { + Some(fluent::lint_improper_ctypes_struct_fieldless_help) + } else { + Some(fluent::lint_improper_ctypes_union_fieldless_help) + }, + }; + } + + self.check_variant_for_ffi(state, ty, def, def.non_enum_variant(), args) + } + AdtKind::Enum => { + if def.variants().is_empty() { + // Empty enums are okay... although sort of useless. + return FfiSafe; + } + // Check for a repr() attribute to specify the size of the + // discriminant. + if !def.repr().c() && !def.repr().transparent() && def.repr().int.is_none() + { + // Special-case types like `Option` and `Result` + if let Some(ty) = + repr_nullable_ptr(self.cx.tcx, self.cx.typing_env(), ty) + { + return self.visit_type(state, ty); + } + + return FfiUnsafe { + ty, + reason: fluent::lint_improper_ctypes_enum_repr_reason, + help: Some(fluent::lint_improper_ctypes_enum_repr_help), + }; + } + + let non_exhaustive = def.variant_list_has_applicable_non_exhaustive(); + // Check the contained variants. + let ret = def.variants().iter().try_for_each(|variant| { + check_non_exhaustive_variant(non_exhaustive, variant) + .map_break(|reason| FfiUnsafe { ty, reason, help: None })?; + + match self.check_variant_for_ffi(state, ty, def, variant, args) { + FfiSafe => ControlFlow::Continue(()), + r => ControlFlow::Break(r), + } + }); + if let ControlFlow::Break(result) = ret { + return result; + } + + FfiSafe + } + } + } + + ty::Char => FfiUnsafe { + ty, + reason: fluent::lint_improper_ctypes_char_reason, + help: Some(fluent::lint_improper_ctypes_char_help), + }, + + // It's just extra invariants on the type that you need to uphold, + // but only the base type is relevant for being representable in FFI. + ty::Pat(base, ..) => self.visit_type(state, base), + + // Primitive types with a stable representation. + ty::Bool | ty::Int(..) | ty::Uint(..) | ty::Float(..) | ty::Never => FfiSafe, + + ty::Slice(_) => FfiUnsafe { + ty, + reason: fluent::lint_improper_ctypes_slice_reason, + help: Some(fluent::lint_improper_ctypes_slice_help), + }, + + ty::Dynamic(..) => { + FfiUnsafe { ty, reason: fluent::lint_improper_ctypes_dyn, help: None } + } + + ty::Str => FfiUnsafe { + ty, + reason: fluent::lint_improper_ctypes_str_reason, + help: Some(fluent::lint_improper_ctypes_str_help), + }, + + ty::Tuple(..) => FfiUnsafe { + ty, + reason: fluent::lint_improper_ctypes_tuple_reason, + help: Some(fluent::lint_improper_ctypes_tuple_help), + }, + + ty::RawPtr(ty, _) | ty::Ref(_, ty, _) + if { + (state.is_in_defined_function() || state.is_in_fnptr()) + && ty.is_sized(self.cx.tcx, self.cx.typing_env()) + } => + { + FfiSafe + } + + ty::RawPtr(ty, _) + if match ty.kind() { + ty::Tuple(tuple) => tuple.is_empty(), + _ => false, + } => + { + FfiSafe + } + + ty::RawPtr(ty, _) | ty::Ref(_, ty, _) => self.visit_type(state, ty), + + ty::Array(inner_ty, _) => self.visit_type(state, inner_ty), + + ty::FnPtr(sig_tys, hdr) => { + let sig = sig_tys.with(hdr); + if sig.abi().is_rustic_abi() { + return FfiUnsafe { + ty, + reason: fluent::lint_improper_ctypes_fnptr_reason, + help: Some(fluent::lint_improper_ctypes_fnptr_help), + }; + } + + let sig = tcx.instantiate_bound_regions_with_erased(sig); + for arg in sig.inputs() { + match self.visit_type(VisitorState::ARGUMENT_TY_IN_FNPTR, *arg) { + FfiSafe => {} + r => return r, + } + } + + let ret_ty = sig.output(); + if ret_ty.is_unit() { + return FfiSafe; + } + + self.visit_type(VisitorState::RETURN_TY_IN_FNPTR, ret_ty) + } + + ty::Foreign(..) => FfiSafe, + + // While opaque types are checked for earlier, if a projection in a struct field + // normalizes to an opaque type, then it will reach this branch. + ty::Alias(ty::Opaque, ..) => { + FfiUnsafe { ty, reason: fluent::lint_improper_ctypes_opaque, help: None } + } + + // `extern "C" fn` functions can have type parameters, which may or may not be FFI-safe, + // so they are currently ignored for the purposes of this lint. + ty::Param(..) | ty::Alias(ty::Projection | ty::Inherent, ..) + if state.can_expect_ty_params() => + { + FfiSafe + } + + ty::UnsafeBinder(_) => todo!("FIXME(unsafe_binder)"), + + ty::Param(..) + | ty::Alias(ty::Projection | ty::Inherent | ty::Free, ..) + | ty::Infer(..) + | ty::Bound(..) + | ty::Error(_) + | ty::Closure(..) + | ty::CoroutineClosure(..) + | ty::Coroutine(..) + | ty::CoroutineWitness(..) + | ty::Placeholder(..) + | ty::FnDef(..) => bug!("unexpected type in foreign function: {:?}", ty), + } + } + + fn visit_for_opaque_ty(&mut self, ty: Ty<'tcx>) -> PartialFfiResult<'tcx> { + struct ProhibitOpaqueTypes; + impl<'tcx> ty::TypeVisitor> for ProhibitOpaqueTypes { + type Result = ControlFlow>; + + fn visit_ty(&mut self, ty: Ty<'tcx>) -> Self::Result { + if !ty.has_opaque_types() { + return ControlFlow::Continue(()); + } + + if let ty::Alias(ty::Opaque, ..) = ty.kind() { + ControlFlow::Break(ty) + } else { + ty.super_visit_with(self) + } + } + } + + if let Some(ty) = self + .cx + .tcx + .try_normalize_erasing_regions(self.cx.typing_env(), ty) + .unwrap_or(ty) + .visit_with(&mut ProhibitOpaqueTypes) + .break_value() + { + Some(FfiResult::FfiUnsafe { + ty, + reason: fluent::lint_improper_ctypes_opaque, + help: None, + }) + } else { + None + } + } + + /// Check if the type is array and emit an unsafe type lint. + fn check_for_array_ty(&mut self, ty: Ty<'tcx>) -> PartialFfiResult<'tcx> { + if let ty::Array(..) = ty.kind() { + Some(FfiResult::FfiUnsafe { + ty, + reason: fluent::lint_improper_ctypes_array_reason, + help: Some(fluent::lint_improper_ctypes_array_help), + }) + } else { + None + } + } + + /// Determine the FFI-safety of a single (MIR) type, given the context of how it is used. + fn check_type(&mut self, state: VisitorState, ty: Ty<'tcx>) -> FfiResult<'tcx> { + if let Some(res) = self.visit_for_opaque_ty(ty) { + return res; + } + + let ty = self.cx.tcx.try_normalize_erasing_regions(self.cx.typing_env(), ty).unwrap_or(ty); + + // C doesn't really support passing arrays by value - the only way to pass an array by value + // is through a struct. So, first test that the top level isn't an array, and then + // recursively check the types inside. + if state.is_in_function() { + if let Some(res) = self.check_for_array_ty(ty) { + return res; + } + } + + // Don't report FFI errors for unit return types. This check exists here, and not in + // the caller (where it would make more sense) so that normalization has definitely + // happened. + if state.is_in_function_return() && ty.is_unit() { + return FfiResult::FfiSafe; + } + + self.visit_type(state, ty) + } +} + +impl<'tcx> ImproperCTypesLint { + /// Find any fn-ptr types with external ABIs in `ty`, and FFI-checks them. + /// For example, `Option` FFI-checks `extern "C" fn()`. + fn check_type_for_external_abi_fnptr( + &mut self, + cx: &LateContext<'tcx>, + state: VisitorState, + hir_ty: &hir::Ty<'tcx>, + ty: Ty<'tcx>, + fn_mode: CItemKind, + ) { + struct FnPtrFinder<'tcx> { + spans: Vec, + tys: Vec>, + } + + impl<'tcx> hir::intravisit::Visitor<'_> for FnPtrFinder<'tcx> { + fn visit_ty(&mut self, ty: &'_ hir::Ty<'_, AmbigArg>) { + debug!(?ty); + if let hir::TyKind::FnPtr(hir::FnPtrTy { abi, .. }) = ty.kind + && !abi.is_rustic_abi() + { + self.spans.push(ty.span); + } + + hir::intravisit::walk_ty(self, ty) + } + } + + impl<'tcx> ty::TypeVisitor> for FnPtrFinder<'tcx> { + type Result = (); + + fn visit_ty(&mut self, ty: Ty<'tcx>) -> Self::Result { + if let ty::FnPtr(_, hdr) = ty.kind() + && !hdr.abi.is_rustic_abi() + { + self.tys.push(ty); + } + + ty.super_visit_with(self) + } + } + + let mut visitor = FnPtrFinder { spans: Vec::new(), tys: Vec::new() }; + ty.visit_with(&mut visitor); + visitor.visit_ty_unambig(hir_ty); + + let all_types = iter::zip(visitor.tys.drain(..), visitor.spans.drain(..)); + for (fn_ptr_ty, span) in all_types { + let mut visitor = ImproperCTypesVisitor::new(cx, fn_ptr_ty, fn_mode); + // FIXME(ctypes): make a check_for_fnptr + let ffi_res = visitor.check_type(state, fn_ptr_ty); + + self.process_ffi_result(cx, span, ffi_res, fn_mode); + } + } + + /// Regardless of a function's need to be "ffi-safe", look for fn-ptr argument/return types + /// that need to be checked for ffi-safety. + fn check_fn_for_external_abi_fnptr( + &mut self, + cx: &LateContext<'tcx>, + fn_mode: CItemKind, + def_id: LocalDefId, + decl: &'tcx hir::FnDecl<'_>, + ) { + let sig = cx.tcx.fn_sig(def_id).instantiate_identity(); + let sig = cx.tcx.instantiate_bound_regions_with_erased(sig); + + for (input_ty, input_hir) in iter::zip(sig.inputs(), decl.inputs) { + let state = VisitorState::argument_from_fnmode(fn_mode); + self.check_type_for_external_abi_fnptr(cx, state, input_hir, *input_ty, fn_mode); + } + + if let hir::FnRetTy::Return(ret_hir) = decl.output { + let state = VisitorState::return_from_fnmode(fn_mode); + self.check_type_for_external_abi_fnptr(cx, state, ret_hir, sig.output(), fn_mode); + } + } + + /// For a local definition of a #[repr(C)] struct/enum/union, check that it is indeed FFI-safe. + fn check_reprc_adt( + &mut self, + cx: &LateContext<'tcx>, + item: &'tcx hir::Item<'tcx>, + adt_def: AdtDef<'tcx>, + ) { + debug_assert!( + adt_def.repr().c() && !adt_def.repr().packed() && adt_def.repr().align.is_none() + ); + + // FIXME(ctypes): this following call is awkward. + // is there a way to perform its logic in MIR space rather than HIR space? + // (so that its logic can be absorbed into visitor.visit_struct_or_union) + check_struct_for_power_alignment(cx, item, adt_def); + } + + fn check_foreign_static(&mut self, cx: &LateContext<'tcx>, id: hir::OwnerId, span: Span) { + let ty = cx.tcx.type_of(id).instantiate_identity(); + let mut visitor = ImproperCTypesVisitor::new(cx, ty, CItemKind::Declaration); + let ffi_res = visitor.check_type(VisitorState::STATIC_TY, ty); + self.process_ffi_result(cx, span, ffi_res, CItemKind::Declaration); + } + + /// Check if a function's argument types and result type are "ffi-safe". + fn check_foreign_fn( + &mut self, + cx: &LateContext<'tcx>, + fn_mode: CItemKind, + def_id: LocalDefId, + decl: &'tcx hir::FnDecl<'_>, + ) { + let sig = cx.tcx.fn_sig(def_id).instantiate_identity(); + let sig = cx.tcx.instantiate_bound_regions_with_erased(sig); + + for (input_ty, input_hir) in iter::zip(sig.inputs(), decl.inputs) { + let state = VisitorState::argument_from_fnmode(fn_mode); + let mut visitor = ImproperCTypesVisitor::new(cx, *input_ty, fn_mode); + let ffi_res = visitor.check_type(state, *input_ty); + self.process_ffi_result(cx, input_hir.span, ffi_res, fn_mode); + } + + if let hir::FnRetTy::Return(ret_hir) = decl.output { + let state = VisitorState::return_from_fnmode(fn_mode); + let mut visitor = ImproperCTypesVisitor::new(cx, sig.output(), fn_mode); + let ffi_res = visitor.check_type(state, sig.output()); + self.process_ffi_result(cx, ret_hir.span, ffi_res, fn_mode); + } + } + + fn process_ffi_result( + &self, + cx: &LateContext<'tcx>, + sp: Span, + res: FfiResult<'tcx>, + fn_mode: CItemKind, + ) { + match res { + FfiResult::FfiSafe => {} + FfiResult::FfiPhantom(ty) => { + self.emit_ffi_unsafe_type_lint( + cx, + ty, + sp, + fluent::lint_improper_ctypes_only_phantomdata, + None, + fn_mode, + ); + } + FfiResult::FfiUnsafe { ty, reason, help } => { + self.emit_ffi_unsafe_type_lint(cx, ty, sp, reason, help, fn_mode); + } + } + } + + fn emit_ffi_unsafe_type_lint( + &self, + cx: &LateContext<'tcx>, + ty: Ty<'tcx>, + sp: Span, + note: DiagMessage, + help: Option, + fn_mode: CItemKind, + ) { + let lint = match fn_mode { + CItemKind::Declaration => IMPROPER_CTYPES, + CItemKind::Definition => IMPROPER_CTYPES_DEFINITIONS, + }; + let desc = match fn_mode { + CItemKind::Declaration => "block", + CItemKind::Definition => "fn", + }; + let span_note = if let ty::Adt(def, _) = ty.kind() + && let Some(sp) = cx.tcx.hir_span_if_local(def.did()) + { + Some(sp) + } else { + None + }; + cx.emit_span_lint(lint, sp, ImproperCTypes { ty, desc, label: sp, help, note, span_note }); + } +} + +/// `ImproperCTypesDefinitions` checks items outside of foreign items (e.g. stuff that isn't in +/// `extern "C" { }` blocks): +/// +/// - `extern "" fn` definitions are checked in the same way as the +/// `ImproperCtypesDeclarations` visitor checks functions if `` is external (e.g. "C"). +/// - All other items which contain types (e.g. other functions, struct definitions, etc) are +/// checked for extern fn-ptrs with external ABIs. +impl<'tcx> LateLintPass<'tcx> for ImproperCTypesLint { + fn check_foreign_item(&mut self, cx: &LateContext<'tcx>, it: &hir::ForeignItem<'tcx>) { + let abi = cx.tcx.hir_get_foreign_abi(it.hir_id()); + + match it.kind { + hir::ForeignItemKind::Fn(sig, _, _) => { + // fnptrs are a special case, they always need to be treated as + // "the element rendered unsafe" because their unsafety doesn't affect + // their surroundings, and their type is often declared inline + if !abi.is_rustic_abi() { + self.check_foreign_fn(cx, CItemKind::Declaration, it.owner_id.def_id, sig.decl); + } else { + self.check_fn_for_external_abi_fnptr( + cx, + CItemKind::Declaration, + it.owner_id.def_id, + sig.decl, + ); + } + } + hir::ForeignItemKind::Static(ty, _, _) if !abi.is_rustic_abi() => { + self.check_foreign_static(cx, it.owner_id, ty.span); + } + hir::ForeignItemKind::Static(..) | hir::ForeignItemKind::Type => (), + } + } + + fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'tcx>) { + match item.kind { + hir::ItemKind::Static(_, _, ty, _) + | hir::ItemKind::Const(_, _, ty, _) + | hir::ItemKind::TyAlias(_, _, ty) => { + self.check_type_for_external_abi_fnptr( + cx, + VisitorState::STATIC_TY, + ty, + cx.tcx.type_of(item.owner_id).instantiate_identity(), + CItemKind::Definition, + ); + } + // See `check_fn` for declarations, `check_foreign_items` for definitions in extern blocks + hir::ItemKind::Fn { .. } => {} + hir::ItemKind::Struct(..) | hir::ItemKind::Union(..) | hir::ItemKind::Enum(..) => { + // looking for extern FnPtr:s is delegated to `check_field_def`. + let adt_def: AdtDef<'tcx> = cx.tcx.adt_def(item.owner_id.to_def_id()); + + if adt_def.repr().c() && !adt_def.repr().packed() && adt_def.repr().align.is_none() + { + self.check_reprc_adt(cx, item, adt_def); + } + } + + // Doesn't define something that can contain a external type to be checked. + hir::ItemKind::Impl(..) + | hir::ItemKind::TraitAlias(..) + | hir::ItemKind::Trait(..) + | hir::ItemKind::GlobalAsm { .. } + | hir::ItemKind::ForeignMod { .. } + | hir::ItemKind::Mod(..) + | hir::ItemKind::Macro(..) + | hir::ItemKind::Use(..) + | hir::ItemKind::ExternCrate(..) => {} + } + } + + fn check_field_def(&mut self, cx: &LateContext<'tcx>, field: &'tcx hir::FieldDef<'tcx>) { + self.check_type_for_external_abi_fnptr( + cx, + VisitorState::STATIC_TY, + field.ty, + cx.tcx.type_of(field.def_id).instantiate_identity(), + CItemKind::Definition, + ); + } + + fn check_fn( + &mut self, + cx: &LateContext<'tcx>, + kind: hir::intravisit::FnKind<'tcx>, + decl: &'tcx hir::FnDecl<'_>, + _: &'tcx hir::Body<'_>, + _: Span, + id: LocalDefId, + ) { + use hir::intravisit::FnKind; + + let abi = match kind { + FnKind::ItemFn(_, _, header, ..) => header.abi, + FnKind::Method(_, sig, ..) => sig.header.abi, + _ => return, + }; + + // fnptrs are a special case, they always need to be treated as + // "the element rendered unsafe" because their unsafety doesn't affect + // their surroundings, and their type is often declared inline + if !abi.is_rustic_abi() { + self.check_foreign_fn(cx, CItemKind::Definition, id, decl); + } else { + self.check_fn_for_external_abi_fnptr(cx, CItemKind::Definition, id, decl); + } + } +} diff --git a/compiler/rustc_llvm/build.rs b/compiler/rustc_llvm/build.rs index d01f79dcade0..225ab8c846d8 100644 --- a/compiler/rustc_llvm/build.rs +++ b/compiler/rustc_llvm/build.rs @@ -174,10 +174,10 @@ fn main() { // Prevent critical warnings when we're compiling from rust-lang/rust CI, // except on MSVC, as the compiler throws warnings that are only reported - // for this platform. See https://github.com/rust-lang/rust/pull/145031#issuecomment-3162677202 - // FIXME(llvm22): It looks like the specific problem code has been removed - // in https://github.com/llvm/llvm-project/commit/e8fc808bf8e78a3c80d1f8e293a92677b92366dd, - // retry msvc once we bump our LLVM version. + // for this platform. See https://github.com/rust-lang/rust/pull/145031#issuecomment-3162677202. + // Moreover, LLVM generally guarantees warning-freedom only when building with Clang, as other + // compilers have too many false positives. This is typically the case for MSVC, which throws + // many false-positive warnings. We keep it excluded, for these reasons. if std::env::var_os("CI").is_some() && !target.contains("msvc") { cfg.warnings_into_errors(true); } diff --git a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp index dd4923258149..3bb1533c2fe2 100644 --- a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp +++ b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp @@ -1568,12 +1568,11 @@ extern "C" bool LLVMRustPrepareThinLTOImport(const LLVMRustThinLTOData *Data, return true; } -extern "C" LLVMRustThinLTOBuffer * -LLVMRustThinLTOBufferCreate(LLVMModuleRef M, bool is_thin, bool emit_summary) { +extern "C" LLVMRustThinLTOBuffer *LLVMRustThinLTOBufferCreate(LLVMModuleRef M, + bool is_thin) { auto Ret = std::make_unique(); { auto OS = raw_string_ostream(Ret->data); - auto ThinLinkOS = raw_string_ostream(Ret->thin_link_data); { if (is_thin) { PassBuilder PB; @@ -1587,11 +1586,7 @@ LLVMRustThinLTOBufferCreate(LLVMModuleRef M, bool is_thin, bool emit_summary) { PB.registerLoopAnalyses(LAM); PB.crossRegisterProxies(LAM, FAM, CGAM, MAM); ModulePassManager MPM; - // We only pass ThinLinkOS to be filled in if we want the summary, - // because otherwise LLVM does extra work and may double-emit some - // errors or warnings. - MPM.addPass( - ThinLTOBitcodeWriterPass(OS, emit_summary ? &ThinLinkOS : nullptr)); + MPM.addPass(ThinLTOBitcodeWriterPass(OS, nullptr)); MPM.run(*unwrap(M), MAM); } else { WriteBitcodeToFile(*unwrap(M), OS); diff --git a/compiler/rustc_log/Cargo.toml b/compiler/rustc_log/Cargo.toml index c673d51a1d45..2332ff9b323b 100644 --- a/compiler/rustc_log/Cargo.toml +++ b/compiler/rustc_log/Cargo.toml @@ -5,8 +5,8 @@ edition = "2024" [dependencies] # tidy-alphabetical-start -tracing = "0.1.28" -tracing-core = "=0.1.30" # FIXME(Nilstrieb) tracing has a deadlock: https://github.com/tokio-rs/tracing/issues/2635 +# tracing > 0.1.37 have huge binary size / instructions regression +tracing = "=0.1.37" tracing-subscriber = { version = "0.3.3", default-features = false, features = ["fmt", "env-filter", "smallvec", "parking_lot", "ansi"] } tracing-tree = "0.3.1" # tidy-alphabetical-end diff --git a/compiler/rustc_log/src/lib.rs b/compiler/rustc_log/src/lib.rs index df648bbd4895..26475eec1c10 100644 --- a/compiler/rustc_log/src/lib.rs +++ b/compiler/rustc_log/src/lib.rs @@ -38,7 +38,7 @@ use std::fmt::{self, Display}; use std::io::{self, IsTerminal}; use tracing::dispatcher::SetGlobalDefaultError; -use tracing_core::{Event, Subscriber}; +use tracing::{Event, Subscriber}; use tracing_subscriber::filter::{Directive, EnvFilter, LevelFilter}; use tracing_subscriber::fmt::FmtContext; use tracing_subscriber::fmt::format::{self, FormatEvent, FormatFields}; diff --git a/compiler/rustc_middle/src/mir/consts.rs b/compiler/rustc_middle/src/mir/consts.rs index 164433aede26..5764a9c84eea 100644 --- a/compiler/rustc_middle/src/mir/consts.rs +++ b/compiler/rustc_middle/src/mir/consts.rs @@ -579,7 +579,7 @@ impl<'tcx> Display for Const<'tcx> { } /////////////////////////////////////////////////////////////////////////// -/// Const-related utilities +// Const-related utilities impl<'tcx> TyCtxt<'tcx> { pub fn span_as_caller_location(self, span: Span) -> ConstValue { diff --git a/compiler/rustc_middle/src/mir/statement.rs b/compiler/rustc_middle/src/mir/statement.rs index 6e52bc775ef7..ec2a8e86077d 100644 --- a/compiler/rustc_middle/src/mir/statement.rs +++ b/compiler/rustc_middle/src/mir/statement.rs @@ -408,14 +408,14 @@ impl<'tcx> Place<'tcx> { self.as_ref().project_deeper(more_projections, tcx) } - pub fn ty_from( + pub fn ty_from( local: Local, projection: &[PlaceElem<'tcx>], local_decls: &D, tcx: TyCtxt<'tcx>, ) -> PlaceTy<'tcx> where - D: HasLocalDecls<'tcx>, + D: ?Sized + HasLocalDecls<'tcx>, { PlaceTy::from_ty(local_decls.local_decls()[local].ty).multi_projection_ty(tcx, projection) } @@ -529,9 +529,9 @@ impl<'tcx> PlaceRef<'tcx> { Place { local: self.local, projection: tcx.mk_place_elems(new_projections) } } - pub fn ty(&self, local_decls: &D, tcx: TyCtxt<'tcx>) -> PlaceTy<'tcx> + pub fn ty(&self, local_decls: &D, tcx: TyCtxt<'tcx>) -> PlaceTy<'tcx> where - D: HasLocalDecls<'tcx>, + D: ?Sized + HasLocalDecls<'tcx>, { Place::ty_from(self.local, self.projection, local_decls, tcx) } @@ -630,9 +630,9 @@ impl<'tcx> Operand<'tcx> { if let ty::FnDef(def_id, args) = *const_ty.kind() { Some((def_id, args)) } else { None } } - pub fn ty(&self, local_decls: &D, tcx: TyCtxt<'tcx>) -> Ty<'tcx> + pub fn ty(&self, local_decls: &D, tcx: TyCtxt<'tcx>) -> Ty<'tcx> where - D: HasLocalDecls<'tcx>, + D: ?Sized + HasLocalDecls<'tcx>, { match self { &Operand::Copy(ref l) | &Operand::Move(ref l) => l.ty(local_decls, tcx).ty, @@ -640,9 +640,9 @@ impl<'tcx> Operand<'tcx> { } } - pub fn span(&self, local_decls: &D) -> Span + pub fn span(&self, local_decls: &D) -> Span where - D: HasLocalDecls<'tcx>, + D: ?Sized + HasLocalDecls<'tcx>, { match self { &Operand::Copy(ref l) | &Operand::Move(ref l) => { @@ -674,7 +674,7 @@ impl<'tcx> ConstOperand<'tcx> { } /////////////////////////////////////////////////////////////////////////// -/// Rvalues +// Rvalues pub enum RvalueInitializationState { Shallow, @@ -721,9 +721,9 @@ impl<'tcx> Rvalue<'tcx> { } } - pub fn ty(&self, local_decls: &D, tcx: TyCtxt<'tcx>) -> Ty<'tcx> + pub fn ty(&self, local_decls: &D, tcx: TyCtxt<'tcx>) -> Ty<'tcx> where - D: HasLocalDecls<'tcx>, + D: ?Sized + HasLocalDecls<'tcx>, { match *self { Rvalue::Use(ref operand) => operand.ty(local_decls, tcx), diff --git a/compiler/rustc_middle/src/mir/visit.rs b/compiler/rustc_middle/src/mir/visit.rs index 904d78d69b61..b498b7b8912c 100644 --- a/compiler/rustc_middle/src/mir/visit.rs +++ b/compiler/rustc_middle/src/mir/visit.rs @@ -1415,6 +1415,24 @@ impl PlaceContext { ) } + /// Returns `true` if this place context may be used to know the address of the given place. + #[inline] + pub fn may_observe_address(self) -> bool { + matches!( + self, + PlaceContext::NonMutatingUse( + NonMutatingUseContext::SharedBorrow + | NonMutatingUseContext::RawBorrow + | NonMutatingUseContext::FakeBorrow + ) | PlaceContext::MutatingUse( + MutatingUseContext::Drop + | MutatingUseContext::Borrow + | MutatingUseContext::RawBorrow + | MutatingUseContext::AsmOutput + ) + ) + } + /// Returns `true` if this place context represents a storage live or storage dead marker. #[inline] pub fn is_storage_marker(self) -> bool { diff --git a/compiler/rustc_middle/src/ty/codec.rs b/compiler/rustc_middle/src/ty/codec.rs index 95759d1f31a7..3f37595d0eef 100644 --- a/compiler/rustc_middle/src/ty/codec.rs +++ b/compiler/rustc_middle/src/ty/codec.rs @@ -216,10 +216,7 @@ impl<'tcx, E: TyEncoder<'tcx>> Encodable for ty::ParamEnv<'tcx> { #[inline] fn decode_arena_allocable<'tcx, D: TyDecoder<'tcx>, T: ArenaAllocatable<'tcx> + Decodable>( decoder: &mut D, -) -> &'tcx T -where - D: TyDecoder<'tcx>, -{ +) -> &'tcx T { decoder.interner().arena.alloc(Decodable::decode(decoder)) } @@ -230,10 +227,7 @@ fn decode_arena_allocable_slice< T: ArenaAllocatable<'tcx> + Decodable, >( decoder: &mut D, -) -> &'tcx [T] -where - D: TyDecoder<'tcx>, -{ +) -> &'tcx [T] { decoder.interner().arena.alloc_from_iter( as Decodable>::decode(decoder)) } diff --git a/compiler/rustc_mir_dataflow/src/impls/liveness.rs b/compiler/rustc_mir_dataflow/src/impls/liveness.rs index 6ec1b03a34e6..5eba474a60c7 100644 --- a/compiler/rustc_mir_dataflow/src/impls/liveness.rs +++ b/compiler/rustc_mir_dataflow/src/impls/liveness.rs @@ -92,7 +92,7 @@ impl<'tcx> Visitor<'tcx> for TransferFunction<'_> { } match DefUse::for_place(*place, context) { - Some(DefUse::Def) => { + DefUse::Def => { if let PlaceContext::MutatingUse( MutatingUseContext::Call | MutatingUseContext::AsmOutput, ) = context @@ -105,8 +105,8 @@ impl<'tcx> Visitor<'tcx> for TransferFunction<'_> { self.0.kill(place.local); } } - Some(DefUse::Use) => self.0.gen_(place.local), - None => {} + DefUse::Use => self.0.gen_(place.local), + DefUse::PartialWrite | DefUse::NonUse => {} } self.visit_projection(place.as_ref(), context, location); @@ -131,23 +131,29 @@ impl<'tcx> Visitor<'tcx> for YieldResumeEffect<'_> { } #[derive(Eq, PartialEq, Clone)] -enum DefUse { +pub enum DefUse { + /// Full write to the local. Def, + /// Read of any part of the local. Use, + /// Partial write to the local. + PartialWrite, + /// Non-use, like debuginfo. + NonUse, } impl DefUse { fn apply(state: &mut DenseBitSet, place: Place<'_>, context: PlaceContext) { match DefUse::for_place(place, context) { - Some(DefUse::Def) => state.kill(place.local), - Some(DefUse::Use) => state.gen_(place.local), - None => {} + DefUse::Def => state.kill(place.local), + DefUse::Use => state.gen_(place.local), + DefUse::PartialWrite | DefUse::NonUse => {} } } - fn for_place(place: Place<'_>, context: PlaceContext) -> Option { + pub fn for_place(place: Place<'_>, context: PlaceContext) -> DefUse { match context { - PlaceContext::NonUse(_) => None, + PlaceContext::NonUse(_) => DefUse::NonUse, PlaceContext::MutatingUse( MutatingUseContext::Call @@ -156,21 +162,20 @@ impl DefUse { | MutatingUseContext::Store | MutatingUseContext::Deinit, ) => { + // Treat derefs as a use of the base local. `*p = 4` is not a def of `p` but a use. if place.is_indirect() { - // Treat derefs as a use of the base local. `*p = 4` is not a def of `p` but a - // use. - Some(DefUse::Use) + DefUse::Use } else if place.projection.is_empty() { - Some(DefUse::Def) + DefUse::Def } else { - None + DefUse::PartialWrite } } // Setting the discriminant is not a use because it does no reading, but it is also not // a def because it does not overwrite the whole place PlaceContext::MutatingUse(MutatingUseContext::SetDiscriminant) => { - place.is_indirect().then_some(DefUse::Use) + if place.is_indirect() { DefUse::Use } else { DefUse::PartialWrite } } // All other contexts are uses... @@ -188,7 +193,7 @@ impl DefUse { | NonMutatingUseContext::PlaceMention | NonMutatingUseContext::FakeBorrow | NonMutatingUseContext::SharedBorrow, - ) => Some(DefUse::Use), + ) => DefUse::Use, PlaceContext::MutatingUse(MutatingUseContext::Projection) | PlaceContext::NonMutatingUse(NonMutatingUseContext::Projection) => { diff --git a/compiler/rustc_mir_dataflow/src/impls/mod.rs b/compiler/rustc_mir_dataflow/src/impls/mod.rs index 3f29b819a6d1..6d573e1c00e1 100644 --- a/compiler/rustc_mir_dataflow/src/impls/mod.rs +++ b/compiler/rustc_mir_dataflow/src/impls/mod.rs @@ -9,7 +9,8 @@ pub use self::initialized::{ MaybeUninitializedPlaces, MaybeUninitializedPlacesDomain, }; pub use self::liveness::{ - MaybeLiveLocals, MaybeTransitiveLiveLocals, TransferFunction as LivenessTransferFunction, + DefUse, MaybeLiveLocals, MaybeTransitiveLiveLocals, + TransferFunction as LivenessTransferFunction, }; pub use self::storage_liveness::{ MaybeRequiresStorage, MaybeStorageDead, MaybeStorageLive, always_storage_live_locals, diff --git a/compiler/rustc_mir_dataflow/src/points.rs b/compiler/rustc_mir_dataflow/src/points.rs index 70d1a34b5fb1..e3d1e04a319b 100644 --- a/compiler/rustc_mir_dataflow/src/points.rs +++ b/compiler/rustc_mir_dataflow/src/points.rs @@ -1,9 +1,5 @@ -use rustc_index::bit_set::DenseBitSet; -use rustc_index::interval::SparseIntervalMatrix; use rustc_index::{Idx, IndexVec}; -use rustc_middle::mir::{self, BasicBlock, Body, Location}; - -use crate::framework::{Analysis, Results, ResultsVisitor, visit_results}; +use rustc_middle::mir::{BasicBlock, Body, Location}; /// Maps between a `Location` and a `PointIndex` (and vice versa). pub struct DenseLocationMap { @@ -93,65 +89,3 @@ rustc_index::newtype_index! { #[debug_format = "PointIndex({})"] pub struct PointIndex {} } - -/// Add points depending on the result of the given dataflow analysis. -pub fn save_as_intervals<'tcx, N, A>( - elements: &DenseLocationMap, - body: &mir::Body<'tcx>, - mut analysis: A, - results: Results, -) -> SparseIntervalMatrix -where - N: Idx, - A: Analysis<'tcx, Domain = DenseBitSet>, -{ - let values = SparseIntervalMatrix::new(elements.num_points()); - let mut visitor = Visitor { elements, values }; - visit_results( - body, - body.basic_blocks.reverse_postorder().iter().copied(), - &mut analysis, - &results, - &mut visitor, - ); - visitor.values -} - -struct Visitor<'a, N: Idx> { - elements: &'a DenseLocationMap, - values: SparseIntervalMatrix, -} - -impl<'tcx, A, N> ResultsVisitor<'tcx, A> for Visitor<'_, N> -where - A: Analysis<'tcx, Domain = DenseBitSet>, - N: Idx, -{ - fn visit_after_primary_statement_effect<'mir>( - &mut self, - _analysis: &mut A, - state: &A::Domain, - _statement: &'mir mir::Statement<'tcx>, - location: Location, - ) { - let point = self.elements.point_from_location(location); - // Use internal iterator manually as it is much more efficient. - state.iter().for_each(|node| { - self.values.insert(node, point); - }); - } - - fn visit_after_primary_terminator_effect<'mir>( - &mut self, - _analysis: &mut A, - state: &A::Domain, - _terminator: &'mir mir::Terminator<'tcx>, - location: Location, - ) { - let point = self.elements.point_from_location(location); - // Use internal iterator manually as it is much more efficient. - state.iter().for_each(|node| { - self.values.insert(node, point); - }); - } -} diff --git a/compiler/rustc_mir_dataflow/src/value_analysis.rs b/compiler/rustc_mir_dataflow/src/value_analysis.rs index 005e79731307..9a00831dc012 100644 --- a/compiler/rustc_mir_dataflow/src/value_analysis.rs +++ b/compiler/rustc_mir_dataflow/src/value_analysis.rs @@ -6,7 +6,7 @@ use rustc_data_structures::fx::{FxHashMap, FxIndexSet, StdEntry}; use rustc_data_structures::stack::ensure_sufficient_stack; use rustc_index::IndexVec; use rustc_index::bit_set::DenseBitSet; -use rustc_middle::mir::visit::{MutatingUseContext, PlaceContext, Visitor}; +use rustc_middle::mir::visit::{PlaceContext, Visitor}; use rustc_middle::mir::*; use rustc_middle::ty::{self, Ty, TyCtxt}; use tracing::debug; @@ -917,12 +917,7 @@ pub fn excluded_locals(body: &Body<'_>) -> DenseBitSet { impl<'tcx> Visitor<'tcx> for Collector { fn visit_place(&mut self, place: &Place<'tcx>, context: PlaceContext, _location: Location) { - if (context.is_borrow() - || context.is_address_of() - || context.is_drop() - || context == PlaceContext::MutatingUse(MutatingUseContext::AsmOutput)) - && !place.is_indirect() - { + if context.may_observe_address() && !place.is_indirect() { // A pointer to a place could be used to access other places with the same local, // hence we have to exclude the local completely. self.result.insert(place.local); diff --git a/compiler/rustc_mir_transform/src/coverage/expansion.rs b/compiler/rustc_mir_transform/src/coverage/expansion.rs index 91e0528f52f9..851bbaeed48e 100644 --- a/compiler/rustc_mir_transform/src/coverage/expansion.rs +++ b/compiler/rustc_mir_transform/src/coverage/expansion.rs @@ -82,7 +82,7 @@ impl ExpnNode { Self { expn_id, - expn_kind: expn_data.kind.clone(), + expn_kind: expn_data.kind, call_site, call_site_expn_id, diff --git a/compiler/rustc_mir_transform/src/cross_crate_inline.rs b/compiler/rustc_mir_transform/src/cross_crate_inline.rs index b186c2bd7758..df98c07f5495 100644 --- a/compiler/rustc_mir_transform/src/cross_crate_inline.rs +++ b/compiler/rustc_mir_transform/src/cross_crate_inline.rs @@ -135,7 +135,16 @@ impl<'tcx> Visitor<'tcx> for CostChecker<'_, 'tcx> { } } } - TerminatorKind::Call { unwind, .. } => { + TerminatorKind::Call { ref func, unwind, .. } => { + // We track calls because they make our function not a leaf (and in theory, the + // number of calls indicates how likely this function is to perturb other CGUs). + // But intrinsics don't have a body that gets assigned to a CGU, so they are + // ignored. + if let Some((fn_def_id, _)) = func.const_fn_def() + && self.tcx.has_attr(fn_def_id, sym::rustc_intrinsic) + { + return; + } self.calls += 1; if let UnwindAction::Cleanup(_) = unwind { self.landing_pads += 1; diff --git a/compiler/rustc_mir_transform/src/dest_prop.rs b/compiler/rustc_mir_transform/src/dest_prop.rs index cf7425251e8e..9ba2d274691d 100644 --- a/compiler/rustc_mir_transform/src/dest_prop.rs +++ b/compiler/rustc_mir_transform/src/dest_prop.rs @@ -59,6 +59,12 @@ //! The first two conditions are simple structural requirements on the `Assign` statements that can //! be trivially checked. The third requirement however is more difficult and costly to check. //! +//! ## Current implementation +//! +//! The current implementation relies on live range computation to check for conflicts. We only +//! allow to merge locals that have disjoint live ranges. The live range are defined with +//! half-statement granularity, so as to make all writes be live for at least a half statement. +//! //! ## Future Improvements //! //! There are a number of ways in which this pass could be improved in the future: @@ -117,9 +123,8 @@ //! - Layout optimizations for coroutines have been added to improve code generation for //! async/await, which are very similar in spirit to what this optimization does. //! -//! Also, rustc now has a simple NRVO pass (see `nrvo.rs`), which handles a subset of the cases that -//! this destination propagation pass handles, proving that similar optimizations can be performed -//! on MIR. +//! [The next approach][attempt 4] computes a conflict matrix between locals by forbidding merging +//! locals with competing writes or with one write while the other is live. //! //! ## Pre/Post Optimization //! @@ -130,20 +135,18 @@ //! [attempt 1]: https://github.com/rust-lang/rust/pull/47954 //! [attempt 2]: https://github.com/rust-lang/rust/pull/71003 //! [attempt 3]: https://github.com/rust-lang/rust/pull/72632 +//! [attempt 4]: https://github.com/rust-lang/rust/pull/96451 -use rustc_data_structures::fx::{FxIndexMap, IndexEntry, IndexOccupiedEntry}; +use rustc_data_structures::union_find::UnionFind; use rustc_index::bit_set::DenseBitSet; use rustc_index::interval::SparseIntervalMatrix; -use rustc_middle::bug; +use rustc_index::{IndexVec, newtype_index}; use rustc_middle::mir::visit::{MutVisitor, PlaceContext, Visitor}; -use rustc_middle::mir::{ - Body, HasLocalDecls, InlineAsmOperand, Local, LocalKind, Location, MirDumper, Operand, - PassWhere, Place, Rvalue, Statement, StatementKind, TerminatorKind, traversal, -}; +use rustc_middle::mir::*; use rustc_middle::ty::TyCtxt; -use rustc_mir_dataflow::Analysis; -use rustc_mir_dataflow::impls::MaybeLiveLocals; -use rustc_mir_dataflow::points::{DenseLocationMap, PointIndex, save_as_intervals}; +use rustc_mir_dataflow::impls::{DefUse, MaybeLiveLocals}; +use rustc_mir_dataflow::points::DenseLocationMap; +use rustc_mir_dataflow::{Analysis, Results}; use tracing::{debug, trace}; pub(super) struct DestinationPropagation; @@ -161,84 +164,81 @@ impl<'tcx> crate::MirPass<'tcx> for DestinationPropagation { sess.mir_opt_level() >= 3 } + #[tracing::instrument(level = "trace", skip(self, tcx, body))] fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) { let def_id = body.source.def_id(); - let mut candidates = Candidates::default(); - let mut write_info = WriteInfo::default(); - trace!(func = ?tcx.def_path_str(def_id)); + trace!(?def_id); let borrowed = rustc_mir_dataflow::impls::borrowed_locals(body); - let live = MaybeLiveLocals.iterate_to_fixpoint(tcx, body, Some("MaybeLiveLocals-DestProp")); - let points = DenseLocationMap::new(body); - let mut live = save_as_intervals(&points, body, live.analysis, live.results); - - // In order to avoid having to collect data for every single pair of locals in the body, we - // do not allow doing more than one merge for places that are derived from the same local at - // once. To avoid missed opportunities, we instead iterate to a fixed point - we'll refer to - // each of these iterations as a "round." - // - // Reaching a fixed point could in theory take up to `min(l, s)` rounds - however, we do not - // expect to see MIR like that. To verify this, a test was run against `[rust-lang/regex]` - - // the average MIR body saw 1.32 full iterations of this loop. The most that was hit were 30 - // for a single function. Only 80/2801 (2.9%) of functions saw at least 5. - // - // [rust-lang/regex]: - // https://github.com/rust-lang/regex/tree/b5372864e2df6a2f5e543a556a62197f50ca3650 - let mut round_count = 0; - loop { - // PERF: Can we do something smarter than recalculating the candidates and liveness - // results? - candidates.reset_and_find(body, &borrowed); - trace!(?candidates); - dest_prop_mir_dump(tcx, body, &points, &live, round_count); - - FilterInformation::filter_liveness( - &mut candidates, - &points, - &live, - &mut write_info, - body, - ); - - // Because we only filter once per round, it is unsound to use a local for more than - // one merge operation within a single round of optimizations. We store here which ones - // we have already used. - let mut merged_locals: DenseBitSet = - DenseBitSet::new_empty(body.local_decls.len()); - - // This is the set of merges we will apply this round. It is a subset of the candidates. - let mut merges = FxIndexMap::default(); - - for (src, candidates) in candidates.c.iter() { - if merged_locals.contains(*src) { - continue; - } - let Some(dest) = candidates.iter().find(|dest| !merged_locals.contains(**dest)) - else { - continue; - }; - - // Replace `src` by `dest` everywhere. - merges.insert(*src, *dest); - merged_locals.insert(*src); - merged_locals.insert(*dest); - - // Update liveness information based on the merge we just performed. - // Every location where `src` was live, `dest` will be live. - live.union_rows(*src, *dest); - } - trace!(merging = ?merges); - - if merges.is_empty() { - break; - } - round_count += 1; - - apply_merges(body, tcx, merges, merged_locals); + let candidates = Candidates::find(body, &borrowed); + trace!(?candidates); + if candidates.c.is_empty() { + return; } - trace!(round_count); + let live = MaybeLiveLocals.iterate_to_fixpoint(tcx, body, Some("MaybeLiveLocals-DestProp")); + + let points = DenseLocationMap::new(body); + let mut relevant = RelevantLocals::compute(&candidates, body.local_decls.len()); + let mut live = save_as_intervals(&points, body, &relevant, live.results); + + dest_prop_mir_dump(tcx, body, &points, &live, &relevant); + + let mut merged_locals = DenseBitSet::new_empty(body.local_decls.len()); + + for (src, dst) in candidates.c.into_iter() { + trace!(?src, ?dst); + + let Some(mut src) = relevant.find(src) else { continue }; + let Some(mut dst) = relevant.find(dst) else { continue }; + if src == dst { + continue; + } + + let Some(src_live_ranges) = live.row(src) else { continue }; + let Some(dst_live_ranges) = live.row(dst) else { continue }; + trace!(?src, ?src_live_ranges); + trace!(?dst, ?dst_live_ranges); + + if src_live_ranges.disjoint(dst_live_ranges) { + // We want to replace `src` by `dst`. + let mut orig_src = relevant.original[src]; + let mut orig_dst = relevant.original[dst]; + + // The return place and function arguments are required and cannot be renamed. + // This check cannot be made during candidate collection, as we may want to + // unify the same non-required local with several required locals. + match (is_local_required(orig_src, body), is_local_required(orig_dst, body)) { + // Renaming `src` is ok. + (false, _) => {} + // Renaming `src` is wrong, but renaming `dst` is ok. + (true, false) => { + std::mem::swap(&mut src, &mut dst); + std::mem::swap(&mut orig_src, &mut orig_dst); + } + // Neither local can be renamed, so skip this case. + (true, true) => continue, + } + + trace!(?src, ?dst, "merge"); + merged_locals.insert(orig_src); + merged_locals.insert(orig_dst); + + // Replace `src` by `dst`. + let head = relevant.union(src, dst); + live.union_rows(/* read */ src, /* write */ head); + live.union_rows(/* read */ dst, /* write */ head); + } + } + trace!(?merged_locals); + trace!(?relevant.renames); + + if merged_locals.is_empty() { + return; + } + + apply_merges(body, tcx, relevant, merged_locals); } fn is_required(&self) -> bool { @@ -246,30 +246,6 @@ impl<'tcx> crate::MirPass<'tcx> for DestinationPropagation { } } -#[derive(Debug, Default)] -struct Candidates { - /// The set of candidates we are considering in this optimization. - /// - /// We will always merge the key into at most one of its values. - /// - /// Whether a place ends up in the key or the value does not correspond to whether it appears as - /// the lhs or rhs of any assignment. As a matter of fact, the places in here might never appear - /// in an assignment at all. This happens because if we see an assignment like this: - /// - /// ```ignore (syntax-highlighting-only) - /// _1.0 = _2.0 - /// ``` - /// - /// We will still report that we would like to merge `_1` and `_2` in an attempt to allow us to - /// remove that assignment. - c: FxIndexMap>, - - /// A reverse index of the `c` set; if the `c` set contains `a => Place { local: b, proj }`, - /// then this contains `b => a`. - // PERF: Possibly these should be `SmallVec`s? - reverse: FxIndexMap>, -} - ////////////////////////////////////////////////////////// // Merging // @@ -278,16 +254,16 @@ struct Candidates { fn apply_merges<'tcx>( body: &mut Body<'tcx>, tcx: TyCtxt<'tcx>, - merges: FxIndexMap, + relevant: RelevantLocals, merged_locals: DenseBitSet, ) { - let mut merger = Merger { tcx, merges, merged_locals }; + let mut merger = Merger { tcx, relevant, merged_locals }; merger.visit_body_preserves_cfg(body); } struct Merger<'tcx> { tcx: TyCtxt<'tcx>, - merges: FxIndexMap, + relevant: RelevantLocals, merged_locals: DenseBitSet, } @@ -297,8 +273,8 @@ impl<'tcx> MutVisitor<'tcx> for Merger<'tcx> { } fn visit_local(&mut self, local: &mut Local, _: PlaceContext, _location: Location) { - if let Some(dest) = self.merges.get(local) { - *local = *dest; + if let Some(relevant) = self.relevant.find(*local) { + *local = self.relevant.original[relevant]; } } @@ -336,17 +312,75 @@ impl<'tcx> MutVisitor<'tcx> for Merger<'tcx> { } ////////////////////////////////////////////////////////// -// Liveness filtering +// Relevant locals // -// This section enforces bullet point 2 +// Small utility to reduce size of the conflict matrix by only considering locals that appear in +// the candidates -struct FilterInformation<'a, 'tcx> { - body: &'a Body<'tcx>, - points: &'a DenseLocationMap, - live: &'a SparseIntervalMatrix, - candidates: &'a mut Candidates, - write_info: &'a mut WriteInfo, - at: Location, +newtype_index! { + /// Represent a subset of locals which appear in candidates. + struct RelevantLocal {} +} + +#[derive(Debug)] +struct RelevantLocals { + original: IndexVec, + shrink: IndexVec>, + renames: UnionFind, +} + +impl RelevantLocals { + #[tracing::instrument(level = "trace", skip(candidates, num_locals), ret)] + fn compute(candidates: &Candidates, num_locals: usize) -> RelevantLocals { + let mut original = IndexVec::with_capacity(candidates.c.len()); + let mut shrink = IndexVec::from_elem_n(None, num_locals); + + // Mark a local as relevant and record it into the maps. + let mut declare = |local| { + shrink.get_or_insert_with(local, || original.push(local)); + }; + + for &(src, dest) in candidates.c.iter() { + declare(src); + declare(dest) + } + + let renames = UnionFind::new(original.len()); + RelevantLocals { original, shrink, renames } + } + + fn find(&mut self, src: Local) -> Option { + let src = self.shrink[src]?; + let src = self.renames.find(src); + Some(src) + } + + fn union(&mut self, lhs: RelevantLocal, rhs: RelevantLocal) -> RelevantLocal { + let head = self.renames.unify(lhs, rhs); + // We need to ensure we keep the original local of the RHS, as it may be a required local. + self.original[head] = self.original[rhs]; + head + } +} + +///////////////////////////////////////////////////// +// Candidate accumulation + +#[derive(Debug, Default)] +struct Candidates { + /// The set of candidates we are considering in this optimization. + /// + /// Whether a place ends up in the key or the value does not correspond to whether it appears as + /// the lhs or rhs of any assignment. As a matter of fact, the places in here might never appear + /// in an assignment at all. This happens because if we see an assignment like this: + /// + /// ```ignore (syntax-highlighting-only) + /// _1.0 = _2.0 + /// ``` + /// + /// We will still report that we would like to merge `_1` and `_2` in an attempt to allow us to + /// remove that assignment. + c: Vec<(Local, Local)>, } // We first implement some utility functions which we will expose removing candidates according to @@ -356,394 +390,17 @@ impl Candidates { /// Collects the candidates for merging. /// /// This is responsible for enforcing the first and third bullet point. - fn reset_and_find<'tcx>(&mut self, body: &Body<'tcx>, borrowed: &DenseBitSet) { - self.c.clear(); - self.reverse.clear(); - let mut visitor = FindAssignments { body, candidates: &mut self.c, borrowed }; + fn find(body: &Body<'_>, borrowed: &DenseBitSet) -> Candidates { + let mut visitor = FindAssignments { body, candidates: Default::default(), borrowed }; visitor.visit_body(body); - // Deduplicate candidates. - for (_, cands) in self.c.iter_mut() { - cands.sort(); - cands.dedup(); - } - // Generate the reverse map. - for (src, cands) in self.c.iter() { - for dest in cands.iter().copied() { - self.reverse.entry(dest).or_default().push(*src); - } - } + + Candidates { c: visitor.candidates } } - - /// Just `Vec::retain`, but the condition is inverted and we add debugging output - fn vec_filter_candidates( - src: Local, - v: &mut Vec, - mut f: impl FnMut(Local) -> CandidateFilter, - at: Location, - ) { - v.retain(|dest| { - let remove = f(*dest); - if remove == CandidateFilter::Remove { - trace!("eliminating {:?} => {:?} due to conflict at {:?}", src, dest, at); - } - remove == CandidateFilter::Keep - }); - } - - /// `vec_filter_candidates` but for an `Entry` - fn entry_filter_candidates( - mut entry: IndexOccupiedEntry<'_, Local, Vec>, - p: Local, - f: impl FnMut(Local) -> CandidateFilter, - at: Location, - ) { - let candidates = entry.get_mut(); - Self::vec_filter_candidates(p, candidates, f, at); - if candidates.len() == 0 { - // FIXME(#120456) - is `swap_remove` correct? - entry.swap_remove(); - } - } - - /// For all candidates `(p, q)` or `(q, p)` removes the candidate if `f(q)` says to do so - fn filter_candidates_by( - &mut self, - p: Local, - mut f: impl FnMut(Local) -> CandidateFilter, - at: Location, - ) { - // Cover the cases where `p` appears as a `src` - if let IndexEntry::Occupied(entry) = self.c.entry(p) { - Self::entry_filter_candidates(entry, p, &mut f, at); - } - // And the cases where `p` appears as a `dest` - let Some(srcs) = self.reverse.get_mut(&p) else { - return; - }; - // We use `retain` here to remove the elements from the reverse set if we've removed the - // matching candidate in the forward set. - srcs.retain(|src| { - if f(*src) == CandidateFilter::Keep { - return true; - } - let IndexEntry::Occupied(entry) = self.c.entry(*src) else { - return false; - }; - Self::entry_filter_candidates( - entry, - *src, - |dest| { - if dest == p { CandidateFilter::Remove } else { CandidateFilter::Keep } - }, - at, - ); - false - }); - } -} - -#[derive(Copy, Clone, PartialEq, Eq)] -enum CandidateFilter { - Keep, - Remove, -} - -impl<'a, 'tcx> FilterInformation<'a, 'tcx> { - /// Filters the set of candidates to remove those that conflict. - /// - /// The steps we take are exactly those that are outlined at the top of the file. For each - /// statement/terminator, we collect the set of locals that are written to in that - /// statement/terminator, and then we remove all pairs of candidates that contain one such local - /// and another one that is live. - /// - /// We need to be careful about the ordering of operations within each statement/terminator - /// here. Many statements might write and read from more than one place, and we need to consider - /// them all. The strategy for doing this is as follows: We first gather all the places that are - /// written to within the statement/terminator via `WriteInfo`. Then, we use the liveness - /// analysis from *before* the statement/terminator (in the control flow sense) to eliminate - /// candidates - this is because we want to conservatively treat a pair of locals that is both - /// read and written in the statement/terminator to be conflicting, and the liveness analysis - /// before the statement/terminator will correctly report locals that are read in the - /// statement/terminator to be live. We are additionally conservative by treating all written to - /// locals as also being read from. - fn filter_liveness( - candidates: &mut Candidates, - points: &DenseLocationMap, - live: &SparseIntervalMatrix, - write_info: &mut WriteInfo, - body: &Body<'tcx>, - ) { - let mut this = FilterInformation { - body, - points, - live, - candidates, - // We don't actually store anything at this scope, we just keep things here to be able - // to reuse the allocation. - write_info, - // Doesn't matter what we put here, will be overwritten before being used - at: Location::START, - }; - this.internal_filter_liveness(); - } - - fn internal_filter_liveness(&mut self) { - for (block, data) in traversal::preorder(self.body) { - self.at = Location { block, statement_index: data.statements.len() }; - self.write_info.for_terminator(&data.terminator().kind); - self.apply_conflicts(); - - for (i, statement) in data.statements.iter().enumerate().rev() { - self.at = Location { block, statement_index: i }; - self.write_info.for_statement(&statement.kind, self.body); - self.apply_conflicts(); - } - } - } - - fn apply_conflicts(&mut self) { - let writes = &self.write_info.writes; - for p in writes { - let other_skip = self.write_info.skip_pair.and_then(|(a, b)| { - if a == *p { - Some(b) - } else if b == *p { - Some(a) - } else { - None - } - }); - let at = self.points.point_from_location(self.at); - self.candidates.filter_candidates_by( - *p, - |q| { - if Some(q) == other_skip { - return CandidateFilter::Keep; - } - // It is possible that a local may be live for less than the - // duration of a statement This happens in the case of function - // calls or inline asm. Because of this, we also mark locals as - // conflicting when both of them are written to in the same - // statement. - if self.live.contains(q, at) || writes.contains(&q) { - CandidateFilter::Remove - } else { - CandidateFilter::Keep - } - }, - self.at, - ); - } - } -} - -/// Describes where a statement/terminator writes to -#[derive(Default, Debug)] -struct WriteInfo { - writes: Vec, - /// If this pair of locals is a candidate pair, completely skip processing it during this - /// statement. All other candidates are unaffected. - skip_pair: Option<(Local, Local)>, -} - -impl WriteInfo { - fn for_statement<'tcx>(&mut self, statement: &StatementKind<'tcx>, body: &Body<'tcx>) { - self.reset(); - match statement { - StatementKind::Assign(box (lhs, rhs)) => { - self.add_place(*lhs); - match rhs { - Rvalue::Use(op) => { - self.add_operand(op); - self.consider_skipping_for_assign_use(*lhs, op, body); - } - Rvalue::Repeat(op, _) => { - self.add_operand(op); - } - Rvalue::Cast(_, op, _) - | Rvalue::UnaryOp(_, op) - | Rvalue::ShallowInitBox(op, _) => { - self.add_operand(op); - } - Rvalue::BinaryOp(_, ops) => { - for op in [&ops.0, &ops.1] { - self.add_operand(op); - } - } - Rvalue::Aggregate(_, ops) => { - for op in ops { - self.add_operand(op); - } - } - Rvalue::WrapUnsafeBinder(op, _) => { - self.add_operand(op); - } - Rvalue::ThreadLocalRef(_) - | Rvalue::NullaryOp(_, _) - | Rvalue::Ref(_, _, _) - | Rvalue::RawPtr(_, _) - | Rvalue::Len(_) - | Rvalue::Discriminant(_) - | Rvalue::CopyForDeref(_) => {} - } - } - // Retags are technically also reads, but reporting them as a write suffices - StatementKind::SetDiscriminant { place, .. } - | StatementKind::Deinit(place) - | StatementKind::Retag(_, place) => { - self.add_place(**place); - } - StatementKind::Intrinsic(_) - | StatementKind::ConstEvalCounter - | StatementKind::Nop - | StatementKind::Coverage(_) - | StatementKind::StorageLive(_) - | StatementKind::StorageDead(_) - | StatementKind::BackwardIncompatibleDropHint { .. } - | StatementKind::PlaceMention(_) => {} - StatementKind::FakeRead(_) | StatementKind::AscribeUserType(_, _) => { - bug!("{:?} not found in this MIR phase", statement) - } - } - } - - fn consider_skipping_for_assign_use<'tcx>( - &mut self, - lhs: Place<'tcx>, - rhs: &Operand<'tcx>, - body: &Body<'tcx>, - ) { - let Some(rhs) = rhs.place() else { return }; - if let Some(pair) = places_to_candidate_pair(lhs, rhs, body) { - self.skip_pair = Some(pair); - } - } - - fn for_terminator<'tcx>(&mut self, terminator: &TerminatorKind<'tcx>) { - self.reset(); - match terminator { - TerminatorKind::SwitchInt { discr: op, .. } - | TerminatorKind::Assert { cond: op, .. } => { - self.add_operand(op); - } - TerminatorKind::Call { destination, func, args, .. } => { - self.add_place(*destination); - self.add_operand(func); - for arg in args { - self.add_operand(&arg.node); - } - } - TerminatorKind::TailCall { func, args, .. } => { - self.add_operand(func); - for arg in args { - self.add_operand(&arg.node); - } - } - TerminatorKind::InlineAsm { operands, .. } => { - for asm_operand in operands { - match asm_operand { - InlineAsmOperand::In { value, .. } => { - self.add_operand(value); - } - InlineAsmOperand::Out { place, .. } => { - if let Some(place) = place { - self.add_place(*place); - } - } - // Note that the `late` field in `InOut` is about whether the registers used - // for these things overlap, and is of absolutely no interest to us. - InlineAsmOperand::InOut { in_value, out_place, .. } => { - if let Some(place) = out_place { - self.add_place(*place); - } - self.add_operand(in_value); - } - InlineAsmOperand::Const { .. } - | InlineAsmOperand::SymFn { .. } - | InlineAsmOperand::SymStatic { .. } - | InlineAsmOperand::Label { .. } => {} - } - } - } - TerminatorKind::Goto { .. } - | TerminatorKind::UnwindResume - | TerminatorKind::UnwindTerminate(_) - | TerminatorKind::Return - | TerminatorKind::Unreachable { .. } => (), - TerminatorKind::Drop { .. } => { - // `Drop`s create a `&mut` and so are not considered - } - TerminatorKind::Yield { .. } - | TerminatorKind::CoroutineDrop - | TerminatorKind::FalseEdge { .. } - | TerminatorKind::FalseUnwind { .. } => { - bug!("{:?} not found in this MIR phase", terminator) - } - } - } - - fn add_place(&mut self, place: Place<'_>) { - self.writes.push(place.local); - } - - fn add_operand<'tcx>(&mut self, op: &Operand<'tcx>) { - match op { - // FIXME(JakobDegen): In a previous version, the `Move` case was incorrectly treated as - // being a read only. This was unsound, however we cannot add a regression test because - // it is not possible to set this off with current MIR. Once we have that ability, a - // regression test should be added. - Operand::Move(p) => self.add_place(*p), - Operand::Copy(_) | Operand::Constant(_) => (), - } - } - - fn reset(&mut self) { - self.writes.clear(); - self.skip_pair = None; - } -} - -///////////////////////////////////////////////////// -// Candidate accumulation - -/// If the pair of places is being considered for merging, returns the candidate which would be -/// merged in order to accomplish this. -/// -/// The contract here is in one direction - there is a guarantee that merging the locals that are -/// outputted by this function would result in an assignment between the inputs becoming a -/// self-assignment. However, there is no guarantee that the returned pair is actually suitable for -/// merging - candidate collection must still check this independently. -/// -/// This output is unique for each unordered pair of input places. -fn places_to_candidate_pair<'tcx>( - a: Place<'tcx>, - b: Place<'tcx>, - body: &Body<'tcx>, -) -> Option<(Local, Local)> { - let (mut a, mut b) = if a.projection.len() == 0 && b.projection.len() == 0 { - (a.local, b.local) - } else { - return None; - }; - - // By sorting, we make sure we're input order independent - if a > b { - std::mem::swap(&mut a, &mut b); - } - - // We could now return `(a, b)`, but then we miss some candidates in the case where `a` can't be - // used as a `src`. - if is_local_required(a, body) { - std::mem::swap(&mut a, &mut b); - } - // We could check `is_local_required` again here, but there's no need - after all, we make no - // promise that the candidate pair is actually valid - Some((a, b)) } struct FindAssignments<'a, 'tcx> { body: &'a Body<'tcx>, - candidates: &'a mut FxIndexMap>, + candidates: Vec<(Local, Local)>, borrowed: &'a DenseBitSet, } @@ -753,11 +410,9 @@ impl<'tcx> Visitor<'tcx> for FindAssignments<'_, 'tcx> { lhs, Rvalue::CopyForDeref(rhs) | Rvalue::Use(Operand::Copy(rhs) | Operand::Move(rhs)), )) = &statement.kind + && let Some(src) = lhs.as_local() + && let Some(dest) = rhs.as_local() { - let Some((src, dest)) = places_to_candidate_pair(*lhs, *rhs, self.body) else { - return; - }; - // As described at the top of the file, we do not go near things that have // their address taken. if self.borrowed.contains(src) || self.borrowed.contains(dest) { @@ -774,13 +429,8 @@ impl<'tcx> Visitor<'tcx> for FindAssignments<'_, 'tcx> { return; } - // Also, we need to make sure that MIR actually allows the `src` to be removed - if is_local_required(src, self.body) { - return; - } - // We may insert duplicates here, but that's fine - self.candidates.entry(src).or_default().push(dest); + self.candidates.push((src, dest)); } } } @@ -803,22 +453,162 @@ fn dest_prop_mir_dump<'tcx>( tcx: TyCtxt<'tcx>, body: &Body<'tcx>, points: &DenseLocationMap, - live: &SparseIntervalMatrix, - round: usize, + live: &SparseIntervalMatrix, + relevant: &RelevantLocals, ) { let locals_live_at = |location| { - let location = points.point_from_location(location); - live.rows().filter(|&r| live.contains(r, location)).collect::>() + live.rows() + .filter(|&r| live.contains(r, location)) + .map(|rl| relevant.original[rl]) + .collect::>() }; if let Some(dumper) = MirDumper::new(tcx, "DestinationPropagation-dataflow", body) { let extra_data = &|pass_where, w: &mut dyn std::io::Write| { if let PassWhere::BeforeLocation(loc) = pass_where { - writeln!(w, " // live: {:?}", locals_live_at(loc))?; + let location = TwoStepIndex::new(points, loc, Effect::Before); + let live = locals_live_at(location); + writeln!(w, " // before: {:?} => {:?}", location, live)?; + } + if let PassWhere::AfterLocation(loc) = pass_where { + let location = TwoStepIndex::new(points, loc, Effect::After); + let live = locals_live_at(location); + writeln!(w, " // after: {:?} => {:?}", location, live)?; } Ok(()) }; - dumper.set_disambiguator(&round).set_extra_data(extra_data).dump_mir(body) + dumper.set_extra_data(extra_data).dump_mir(body) } } + +#[derive(Copy, Clone, Debug)] +enum Effect { + Before, + After, +} + +rustc_index::newtype_index! { + /// A reversed `PointIndex` but with the lower bit encoding early/late inside the statement. + /// The reversed order allows to use the more efficient `IntervalSet::append` method while we + /// iterate on the statements in reverse order. + #[orderable] + #[debug_format = "TwoStepIndex({})"] + struct TwoStepIndex {} +} + +impl TwoStepIndex { + fn new(elements: &DenseLocationMap, location: Location, effect: Effect) -> TwoStepIndex { + let point = elements.point_from_location(location); + let effect = match effect { + Effect::Before => 0, + Effect::After => 1, + }; + let max_index = 2 * elements.num_points() as u32 - 1; + let index = 2 * point.as_u32() + (effect as u32); + // Reverse the indexing to use more efficient `IntervalSet::append`. + TwoStepIndex::from_u32(max_index - index) + } +} + +struct VisitPlacesWith(F); + +impl<'tcx, F> Visitor<'tcx> for VisitPlacesWith +where + F: FnMut(Place<'tcx>, PlaceContext), +{ + fn visit_local(&mut self, local: Local, ctxt: PlaceContext, _: Location) { + (self.0)(local.into(), ctxt); + } + + fn visit_place(&mut self, place: &Place<'tcx>, ctxt: PlaceContext, location: Location) { + (self.0)(*place, ctxt); + self.visit_projection(place.as_ref(), ctxt, location); + } +} + +/// Add points depending on the result of the given dataflow analysis. +fn save_as_intervals<'tcx>( + elements: &DenseLocationMap, + body: &Body<'tcx>, + relevant: &RelevantLocals, + results: Results>, +) -> SparseIntervalMatrix { + let mut values = SparseIntervalMatrix::new(2 * elements.num_points()); + let mut state = MaybeLiveLocals.bottom_value(body); + let reachable_blocks = traversal::reachable_as_bitset(body); + + let two_step_loc = |location, effect| TwoStepIndex::new(elements, location, effect); + let append_at = + |values: &mut SparseIntervalMatrix<_, _>, state: &DenseBitSet, twostep| { + for (relevant, &original) in relevant.original.iter_enumerated() { + if state.contains(original) { + values.append(relevant, twostep); + } + } + }; + + // Iterate blocks in decreasing order, to visit locations in decreasing order. This + // allows to use the more efficient `append` method to interval sets. + for block in body.basic_blocks.indices().rev() { + if !reachable_blocks.contains(block) { + continue; + } + + state.clone_from(&results[block]); + + let block_data = &body.basic_blocks[block]; + let loc = Location { block, statement_index: block_data.statements.len() }; + + let term = block_data.terminator(); + let mut twostep = two_step_loc(loc, Effect::After); + append_at(&mut values, &state, twostep); + // Ensure we have a non-zero live range even for dead stores. This is done by marking all + // the written-to locals as live in the second half of the statement. + // We also ensure that operands read by terminators conflict with writes by that terminator. + // For instance a function call may read args after having written to the destination. + VisitPlacesWith(|place, ctxt| match DefUse::for_place(place, ctxt) { + DefUse::Def | DefUse::Use | DefUse::PartialWrite => { + if let Some(relevant) = relevant.shrink[place.local] { + values.insert(relevant, twostep); + } + } + DefUse::NonUse => {} + }) + .visit_terminator(term, loc); + + twostep = TwoStepIndex::from_u32(twostep.as_u32() + 1); + debug_assert_eq!(twostep, two_step_loc(loc, Effect::Before)); + MaybeLiveLocals.apply_early_terminator_effect(&mut state, term, loc); + MaybeLiveLocals.apply_primary_terminator_effect(&mut state, term, loc); + append_at(&mut values, &state, twostep); + + for (statement_index, stmt) in block_data.statements.iter().enumerate().rev() { + let loc = Location { block, statement_index }; + twostep = TwoStepIndex::from_u32(twostep.as_u32() + 1); + debug_assert_eq!(twostep, two_step_loc(loc, Effect::After)); + append_at(&mut values, &state, twostep); + // Ensure we have a non-zero live range even for dead stores. This is done by marking + // all the written-to locals as live in the second half of the statement. + VisitPlacesWith(|place, ctxt| match DefUse::for_place(place, ctxt) { + DefUse::Def | DefUse::PartialWrite => { + if let Some(relevant) = relevant.shrink[place.local] { + values.insert(relevant, twostep); + } + } + DefUse::Use | DefUse::NonUse => {} + }) + .visit_statement(stmt, loc); + + twostep = TwoStepIndex::from_u32(twostep.as_u32() + 1); + debug_assert_eq!(twostep, two_step_loc(loc, Effect::Before)); + MaybeLiveLocals.apply_early_statement_effect(&mut state, stmt, loc); + MaybeLiveLocals.apply_primary_statement_effect(&mut state, stmt, loc); + // ... but reads from operands are marked as live here so they do not conflict with + // the all the writes we manually marked as live in the second half of the statement. + append_at(&mut values, &state, twostep); + } + } + + values +} diff --git a/compiler/rustc_mir_transform/src/gvn.rs b/compiler/rustc_mir_transform/src/gvn.rs index 5a13394543b4..f867c130efb9 100644 --- a/compiler/rustc_mir_transform/src/gvn.rs +++ b/compiler/rustc_mir_transform/src/gvn.rs @@ -87,6 +87,7 @@ use std::borrow::Cow; use either::Either; +use itertools::Itertools as _; use rustc_abi::{self as abi, BackendRepr, FIRST_VARIANT, FieldIdx, Primitive, Size, VariantIdx}; use rustc_const_eval::const_eval::DummyMachine; use rustc_const_eval::interpret::{ @@ -895,18 +896,13 @@ impl<'body, 'tcx> VnState<'body, 'tcx> { fn simplify_aggregate_to_copy( &mut self, - lhs: &Place<'tcx>, - rvalue: &mut Rvalue<'tcx>, - location: Location, - fields: &[VnIndex], + ty: Ty<'tcx>, variant_index: VariantIdx, + fields: &[VnIndex], ) -> Option { - let Some(&first_field) = fields.first() else { - return None; - }; - let Value::Projection(copy_from_value, _) = *self.get(first_field) else { - return None; - }; + let Some(&first_field) = fields.first() else { return None }; + let Value::Projection(copy_from_value, _) = *self.get(first_field) else { return None }; + // All fields must correspond one-to-one and come from the same aggregate value. if fields.iter().enumerate().any(|(index, &v)| { if let Value::Projection(pointer, ProjectionElem::Field(from_index, _)) = *self.get(v) @@ -933,21 +929,8 @@ impl<'body, 'tcx> VnState<'body, 'tcx> { } } - // Allow introducing places with non-constant offsets, as those are still better than - // reconstructing an aggregate. - if self.ty(copy_from_local_value) == rvalue.ty(self.local_decls, self.tcx) - && let Some(place) = self.try_as_place(copy_from_local_value, location, true) - { - // Avoid creating `*a = copy (*b)`, as they might be aliases resulting in overlapping assignments. - // FIXME: This also avoids any kind of projection, not just derefs. We can add allowed projections. - if lhs.as_local().is_some() { - self.reused_locals.insert(place.local); - *rvalue = Rvalue::Use(Operand::Copy(place)); - } - return Some(copy_from_local_value); - } - - None + // Both must be variants of the same type. + if self.ty(copy_from_local_value) == ty { Some(copy_from_local_value) } else { None } } fn simplify_aggregate( @@ -1023,20 +1006,27 @@ impl<'body, 'tcx> VnState<'body, 'tcx> { } }; - if ty.is_array() && fields.len() > 4 { - let first = fields[0]; - if fields.iter().all(|&v| v == first) { - let len = ty::Const::from_target_usize(self.tcx, fields.len().try_into().unwrap()); - if let Some(op) = self.try_as_operand(first, location) { - *rvalue = Rvalue::Repeat(op, len); - } - return Some(self.insert(ty, Value::Repeat(first, len))); + if ty.is_array() + && fields.len() > 4 + && let Ok(&first) = fields.iter().all_equal_value() + { + let len = ty::Const::from_target_usize(self.tcx, fields.len().try_into().unwrap()); + if let Some(op) = self.try_as_operand(first, location) { + *rvalue = Rvalue::Repeat(op, len); } + return Some(self.insert(ty, Value::Repeat(first, len))); } - if let Some(value) = - self.simplify_aggregate_to_copy(lhs, rvalue, location, &fields, variant_index) - { + if let Some(value) = self.simplify_aggregate_to_copy(ty, variant_index, &fields) { + // Allow introducing places with non-constant offsets, as those are still better than + // reconstructing an aggregate. But avoid creating `*a = copy (*b)`, as they might be + // aliases resulting in overlapping assignments. + let allow_complex_projection = + lhs.projection[..].iter().all(PlaceElem::is_stable_offset); + if let Some(place) = self.try_as_place(value, location, allow_complex_projection) { + self.reused_locals.insert(place.local); + *rvalue = Rvalue::Use(Operand::Copy(place)); + } return Some(value); } diff --git a/compiler/rustc_mir_transform/src/lint_tail_expr_drop_order.rs b/compiler/rustc_mir_transform/src/lint_tail_expr_drop_order.rs index 794984d2f3ed..61c9bbe31239 100644 --- a/compiler/rustc_mir_transform/src/lint_tail_expr_drop_order.rs +++ b/compiler/rustc_mir_transform/src/lint_tail_expr_drop_order.rs @@ -2,6 +2,7 @@ use std::cell::RefCell; use std::collections::hash_map; use std::rc::Rc; +use itertools::Itertools as _; use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexMap}; use rustc_data_structures::unord::{UnordMap, UnordSet}; use rustc_errors::Subdiagnostic; @@ -339,9 +340,9 @@ pub(crate) fn run_lint<'tcx>(tcx: TyCtxt<'tcx>, def_id: LocalDefId, body: &Body< // Suppose that all BIDs point into the same local, // we can remove the this local from the observed drops, // so that we can focus our diagnosis more on the others. - if candidates.iter().all(|&(_, place)| candidates[0].1.local == place.local) { + if let Ok(local) = candidates.iter().map(|&(_, place)| place.local).all_equal_value() { for path_idx in all_locals_dropped.iter() { - if move_data.move_paths[path_idx].place.local == candidates[0].1.local { + if move_data.move_paths[path_idx].place.local == local { to_exclude.insert(path_idx); } } diff --git a/compiler/rustc_mir_transform/src/simplify.rs b/compiler/rustc_mir_transform/src/simplify.rs index 468ef742dfb7..75917d23883b 100644 --- a/compiler/rustc_mir_transform/src/simplify.rs +++ b/compiler/rustc_mir_transform/src/simplify.rs @@ -34,6 +34,7 @@ //! The normal logic that a program with UB can be changed to do anything does not apply to //! pre-"runtime" MIR! +use itertools::Itertools as _; use rustc_index::{Idx, IndexSlice, IndexVec}; use rustc_middle::mir::visit::{MutVisitor, MutatingUseContext, PlaceContext, Visitor}; use rustc_middle::mir::*; @@ -288,20 +289,13 @@ impl<'a, 'tcx> CfgSimplifier<'a, 'tcx> { return false; }; - let first_succ = { - if let Some(first_succ) = terminator.successors().next() { - if terminator.successors().all(|s| s == first_succ) { - let count = terminator.successors().count(); - self.pred_count[first_succ] -= (count - 1) as u32; - first_succ - } else { - return false; - } - } else { - return false; - } + let Ok(first_succ) = terminator.successors().all_equal_value() else { + return false; }; + let count = terminator.successors().count(); + self.pred_count[first_succ] -= (count - 1) as u32; + debug!("simplifying branch {:?}", terminator); terminator.kind = TerminatorKind::Goto { target: first_succ }; true diff --git a/compiler/rustc_mir_transform/src/ssa.rs b/compiler/rustc_mir_transform/src/ssa.rs index cd9a7f4a39df..73c249a3c8cd 100644 --- a/compiler/rustc_mir_transform/src/ssa.rs +++ b/compiler/rustc_mir_transform/src/ssa.rs @@ -225,6 +225,9 @@ impl SsaVisitor<'_, '_> { impl<'tcx> Visitor<'tcx> for SsaVisitor<'_, 'tcx> { fn visit_local(&mut self, local: Local, ctxt: PlaceContext, loc: Location) { + if ctxt.may_observe_address() { + self.borrowed_locals.insert(local); + } match ctxt { PlaceContext::MutatingUse(MutatingUseContext::Projection) | PlaceContext::NonMutatingUse(NonMutatingUseContext::Projection) => bug!(), @@ -237,7 +240,6 @@ impl<'tcx> Visitor<'tcx> for SsaVisitor<'_, 'tcx> { PlaceContext::NonMutatingUse( NonMutatingUseContext::SharedBorrow | NonMutatingUseContext::FakeBorrow, ) => { - self.borrowed_locals.insert(local); self.check_dominates(local, loc); self.direct_uses[local] += 1; } diff --git a/compiler/rustc_parse/src/lexer/mod.rs b/compiler/rustc_parse/src/lexer/mod.rs index e3bd6a9a3270..f5f081efc495 100644 --- a/compiler/rustc_parse/src/lexer/mod.rs +++ b/compiler/rustc_parse/src/lexer/mod.rs @@ -44,19 +44,44 @@ pub(crate) struct UnmatchedDelim { pub candidate_span: Option, } +/// Which tokens should be stripped before lexing the tokens. +pub(crate) enum StripTokens { + /// Strip both shebang and frontmatter. + ShebangAndFrontmatter, + /// Strip the shebang but not frontmatter. + /// + /// That means that char sequences looking like frontmatter are simply + /// interpreted as regular Rust lexemes. + Shebang, + /// Strip nothing. + /// + /// In other words, char sequences looking like a shebang or frontmatter + /// are simply interpreted as regular Rust lexemes. + Nothing, +} + pub(crate) fn lex_token_trees<'psess, 'src>( psess: &'psess ParseSess, mut src: &'src str, mut start_pos: BytePos, override_span: Option, - frontmatter_allowed: FrontmatterAllowed, + strip_tokens: StripTokens, ) -> Result>> { - // Skip `#!`, if present. - if let Some(shebang_len) = rustc_lexer::strip_shebang(src) { - src = &src[shebang_len..]; - start_pos = start_pos + BytePos::from_usize(shebang_len); + match strip_tokens { + StripTokens::Shebang | StripTokens::ShebangAndFrontmatter => { + if let Some(shebang_len) = rustc_lexer::strip_shebang(src) { + src = &src[shebang_len..]; + start_pos = start_pos + BytePos::from_usize(shebang_len); + } + } + StripTokens::Nothing => {} } + let frontmatter_allowed = match strip_tokens { + StripTokens::ShebangAndFrontmatter => FrontmatterAllowed::Yes, + StripTokens::Shebang | StripTokens::Nothing => FrontmatterAllowed::No, + }; + let cursor = Cursor::new(src, frontmatter_allowed); let mut lexer = Lexer { psess, diff --git a/compiler/rustc_parse/src/lib.rs b/compiler/rustc_parse/src/lib.rs index b790966acfd9..d8792d7af4c3 100644 --- a/compiler/rustc_parse/src/lib.rs +++ b/compiler/rustc_parse/src/lib.rs @@ -21,7 +21,6 @@ use rustc_ast::tokenstream::{DelimSpan, TokenStream}; use rustc_ast::{AttrItem, Attribute, MetaItemInner, token}; use rustc_ast_pretty::pprust; use rustc_errors::{Diag, EmissionGuarantee, FatalError, PResult, pluralize}; -use rustc_lexer::FrontmatterAllowed; use rustc_session::parse::ParseSess; use rustc_span::source_map::SourceMap; use rustc_span::{FileName, SourceFile, Span}; @@ -34,6 +33,8 @@ pub mod parser; use parser::Parser; use rustc_ast::token::Delimiter; +use crate::lexer::StripTokens; + pub mod lexer; mod errors; @@ -62,10 +63,10 @@ pub fn new_parser_from_source_str( source: String, ) -> Result, Vec>> { let source_file = psess.source_map().new_source_file(name, source); - new_parser_from_source_file(psess, source_file, FrontmatterAllowed::Yes) + new_parser_from_source_file(psess, source_file, StripTokens::ShebangAndFrontmatter) } -/// Creates a new parser from a simple (no frontmatter) source string. +/// Creates a new parser from a simple (no shebang, no frontmatter) source string. /// /// On failure, the errors must be consumed via `unwrap_or_emit_fatal`, `emit`, `cancel`, /// etc., otherwise a panic will occur when they are dropped. @@ -75,7 +76,7 @@ pub fn new_parser_from_simple_source_str( source: String, ) -> Result, Vec>> { let source_file = psess.source_map().new_source_file(name, source); - new_parser_from_source_file(psess, source_file, FrontmatterAllowed::No) + new_parser_from_source_file(psess, source_file, StripTokens::Nothing) } /// Creates a new parser from a filename. On failure, the errors must be consumed via @@ -109,7 +110,7 @@ pub fn new_parser_from_file<'a>( } err.emit(); }); - new_parser_from_source_file(psess, source_file, FrontmatterAllowed::Yes) + new_parser_from_source_file(psess, source_file, StripTokens::ShebangAndFrontmatter) } pub fn utf8_error( @@ -160,10 +161,10 @@ pub fn utf8_error( fn new_parser_from_source_file( psess: &ParseSess, source_file: Arc, - frontmatter_allowed: FrontmatterAllowed, + strip_tokens: StripTokens, ) -> Result, Vec>> { let end_pos = source_file.end_position(); - let stream = source_file_to_stream(psess, source_file, None, frontmatter_allowed)?; + let stream = source_file_to_stream(psess, source_file, None, strip_tokens)?; let mut parser = Parser::new(psess, stream, None); if parser.token == token::Eof { parser.token.span = Span::new(end_pos, end_pos, parser.token.span.ctxt(), None); @@ -179,8 +180,8 @@ pub fn source_str_to_stream( ) -> Result>> { let source_file = psess.source_map().new_source_file(name, source); // used mainly for `proc_macro` and the likes, not for our parsing purposes, so don't parse - // frontmatters as frontmatters. - source_file_to_stream(psess, source_file, override_span, FrontmatterAllowed::No) + // frontmatters as frontmatters, but for compatibility reason still strip the shebang + source_file_to_stream(psess, source_file, override_span, StripTokens::Shebang) } /// Given a source file, produces a sequence of token trees. Returns any buffered errors from @@ -189,7 +190,7 @@ fn source_file_to_stream<'psess>( psess: &'psess ParseSess, source_file: Arc, override_span: Option, - frontmatter_allowed: FrontmatterAllowed, + strip_tokens: StripTokens, ) -> Result>> { let src = source_file.src.as_ref().unwrap_or_else(|| { psess.dcx().bug(format!( @@ -198,13 +199,7 @@ fn source_file_to_stream<'psess>( )); }); - lexer::lex_token_trees( - psess, - src.as_str(), - source_file.start_pos, - override_span, - frontmatter_allowed, - ) + lexer::lex_token_trees(psess, src.as_str(), source_file.start_pos, override_span, strip_tokens) } /// Runs the given subparser `f` on the tokens of the given `attr`'s item. diff --git a/compiler/rustc_parse/src/parser/expr.rs b/compiler/rustc_parse/src/parser/expr.rs index 9b09cbba7afc..4c02547357ef 100644 --- a/compiler/rustc_parse/src/parser/expr.rs +++ b/compiler/rustc_parse/src/parser/expr.rs @@ -2742,7 +2742,7 @@ impl<'a> Parser<'a> { /// The specified `edition` in `let_chains_policy` should be that of the whole `if` construct, /// i.e. the same span we use to later decide whether the drop behaviour should be that of /// edition `..=2021` or that of `2024..`. - // Public because it is used in rustfmt forks such as https://github.com/tucant/rustfmt/blob/30c83df9e1db10007bdd16dafce8a86b404329b2/src/parse/macros/html.rs#L57 for custom if expressions. + // Public to use it for custom `if` expressions in rustfmt forks like https://github.com/tucant/rustfmt pub fn parse_expr_cond( &mut self, let_chains_policy: LetChainsPolicy, diff --git a/compiler/rustc_parse/src/parser/mod.rs b/compiler/rustc_parse/src/parser/mod.rs index 15598f32429e..3bbca622975c 100644 --- a/compiler/rustc_parse/src/parser/mod.rs +++ b/compiler/rustc_parse/src/parser/mod.rs @@ -22,6 +22,8 @@ use std::{fmt, mem, slice}; use attr_wrapper::{AttrWrapper, UsePreAttrPos}; pub use diagnostics::AttemptLocalParseRecovery; pub(crate) use expr::ForbiddenLetReason; +// Public to use it for custom `if` expressions in rustfmt forks like https://github.com/tucant/rustfmt +pub use expr::LetChainsPolicy; pub(crate) use item::{FnContext, FnParseMode}; pub use pat::{CommaRecoveryMode, RecoverColon, RecoverComma}; pub use path::PathStyle; diff --git a/compiler/rustc_query_impl/src/lib.rs b/compiler/rustc_query_impl/src/lib.rs index 306d4dbc4b48..e499e08c82b9 100644 --- a/compiler/rustc_query_impl/src/lib.rs +++ b/compiler/rustc_query_impl/src/lib.rs @@ -58,7 +58,7 @@ impl<'tcx, C: QueryCache, const ANON: bool, const DEPTH_LIMIT: bool, const FEEDA for DynamicConfig<'tcx, C, ANON, DEPTH_LIMIT, FEEDABLE> { fn clone(&self) -> Self { - DynamicConfig { dynamic: self.dynamic } + *self } } diff --git a/compiler/rustc_resolve/src/diagnostics.rs b/compiler/rustc_resolve/src/diagnostics.rs index abbacc70b3e6..689e713ef46d 100644 --- a/compiler/rustc_resolve/src/diagnostics.rs +++ b/compiler/rustc_resolve/src/diagnostics.rs @@ -1,3 +1,4 @@ +use itertools::Itertools as _; use rustc_ast::visit::{self, Visitor}; use rustc_ast::{ self as ast, CRATE_NODE_ID, Crate, ItemKind, ModKind, NodeId, Path, join_path_idents, @@ -1986,7 +1987,7 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> { let extern_prelude_ambiguity = || { self.extern_prelude.get(&Macros20NormalizedIdent::new(ident)).is_some_and(|entry| { entry.item_binding.map(|(b, _)| b) == Some(b1) - && entry.flag_binding.as_ref().and_then(|pb| pb.get().binding()) == Some(b2) + && entry.flag_binding.as_ref().and_then(|pb| pb.get().0.binding()) == Some(b2) }) }; let (b1, b2, misc1, misc2, swapped) = if b2.span.is_dummy() && !b1.span.is_dummy() { @@ -3469,16 +3470,11 @@ fn show_candidates( err.note(note.to_string()); } } else { - let (_, descr_first, _, _, _) = &inaccessible_path_strings[0]; - let descr = if inaccessible_path_strings + let descr = inaccessible_path_strings .iter() - .skip(1) - .all(|(_, descr, _, _, _)| descr == descr_first) - { - descr_first - } else { - "item" - }; + .map(|&(_, descr, _, _, _)| descr) + .all_equal_value() + .unwrap_or("item"); let plural_descr = if descr.ends_with('s') { format!("{descr}es") } else { format!("{descr}s") }; diff --git a/compiler/rustc_resolve/src/late/diagnostics.rs b/compiler/rustc_resolve/src/late/diagnostics.rs index 80b2095d8ccf..9e3c09388366 100644 --- a/compiler/rustc_resolve/src/late/diagnostics.rs +++ b/compiler/rustc_resolve/src/late/diagnostics.rs @@ -3099,7 +3099,7 @@ impl<'ast, 'ra, 'tcx> LateResolutionVisitor<'_, 'ast, 'ra, 'tcx> { |err, _, span, message, suggestion, span_suggs| { err.multipart_suggestion_verbose( message, - std::iter::once((span, suggestion)).chain(span_suggs.clone()).collect(), + std::iter::once((span, suggestion)).chain(span_suggs).collect(), Applicability::MaybeIncorrect, ); true diff --git a/compiler/rustc_resolve/src/lib.rs b/compiler/rustc_resolve/src/lib.rs index 0dea6ae33273..8b185ce7ef29 100644 --- a/compiler/rustc_resolve/src/lib.rs +++ b/compiler/rustc_resolve/src/lib.rs @@ -1031,7 +1031,7 @@ struct ExternPreludeEntry<'ra> { /// `flag_binding` is `None`, or when `extern crate` introducing `item_binding` used renaming. item_binding: Option<(NameBinding<'ra>, /* introduced by item */ bool)>, /// Binding from an `--extern` flag, lazily populated on first use. - flag_binding: Option>>, + flag_binding: Option, /* finalized */ bool)>>, } impl ExternPreludeEntry<'_> { @@ -1042,7 +1042,7 @@ impl ExternPreludeEntry<'_> { fn flag() -> Self { ExternPreludeEntry { item_binding: None, - flag_binding: Some(Cell::new(PendingBinding::Pending)), + flag_binding: Some(Cell::new((PendingBinding::Pending, false))), } } } @@ -2245,14 +2245,16 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> { fn extern_prelude_get_flag(&self, ident: Ident, finalize: bool) -> Option> { let entry = self.extern_prelude.get(&Macros20NormalizedIdent::new(ident)); entry.and_then(|entry| entry.flag_binding.as_ref()).and_then(|flag_binding| { - let binding = match flag_binding.get() { + let (pending_binding, finalized) = flag_binding.get(); + let binding = match pending_binding { PendingBinding::Ready(binding) => { - if finalize { + if finalize && !finalized { self.cstore_mut().process_path_extern(self.tcx, ident.name, ident.span); } binding } PendingBinding::Pending => { + debug_assert!(!finalized); let crate_id = if finalize { self.cstore_mut().process_path_extern(self.tcx, ident.name, ident.span) } else { @@ -2264,7 +2266,7 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> { }) } }; - flag_binding.set(PendingBinding::Ready(binding)); + flag_binding.set((PendingBinding::Ready(binding), finalize || finalized)); binding.or_else(|| finalize.then_some(self.dummy_binding)) }) } diff --git a/compiler/rustc_span/src/analyze_source_file.rs b/compiler/rustc_span/src/analyze_source_file.rs index bb2cda77dfff..c32593a6d95a 100644 --- a/compiler/rustc_span/src/analyze_source_file.rs +++ b/compiler/rustc_span/src/analyze_source_file.rs @@ -81,8 +81,8 @@ cfg_select! { // use `loadu`, which supports unaligned loading. let chunk = unsafe { _mm_loadu_si128(chunk.as_ptr() as *const __m128i) }; - // For each character in the chunk, see if its byte value is < 0, - // which indicates that it's part of a UTF-8 char. + // For character in the chunk, see if its byte value is < 0, which + // indicates that it's part of a UTF-8 char. let multibyte_test = _mm_cmplt_epi8(chunk, _mm_set1_epi8(0)); // Create a bit mask from the comparison results. let multibyte_mask = _mm_movemask_epi8(multibyte_test); @@ -132,111 +132,8 @@ cfg_select! { } } } - target_arch = "loongarch64" => { - fn analyze_source_file_dispatch( - src: &str, - lines: &mut Vec, - multi_byte_chars: &mut Vec, - ) { - use std::arch::is_loongarch_feature_detected; - - if is_loongarch_feature_detected!("lsx") { - unsafe { - analyze_source_file_lsx(src, lines, multi_byte_chars); - } - } else { - analyze_source_file_generic( - src, - src.len(), - RelativeBytePos::from_u32(0), - lines, - multi_byte_chars, - ); - } - } - - /// Checks 16 byte chunks of text at a time. If the chunk contains - /// something other than printable ASCII characters and newlines, the - /// function falls back to the generic implementation. Otherwise it uses - /// LSX intrinsics to quickly find all newlines. - #[target_feature(enable = "lsx")] - unsafe fn analyze_source_file_lsx( - src: &str, - lines: &mut Vec, - multi_byte_chars: &mut Vec, - ) { - use std::arch::loongarch64::*; - - const CHUNK_SIZE: usize = 16; - - let (chunks, tail) = src.as_bytes().as_chunks::(); - - // This variable keeps track of where we should start decoding a - // chunk. If a multi-byte character spans across chunk boundaries, - // we need to skip that part in the next chunk because we already - // handled it. - let mut intra_chunk_offset = 0; - - for (chunk_index, chunk) in chunks.iter().enumerate() { - // All LSX memory instructions support unaligned access, so using - // vld is fine. - let chunk = unsafe { lsx_vld::<0>(chunk.as_ptr() as *const i8) }; - - // For each character in the chunk, see if its byte value is < 0, - // which indicates that it's part of a UTF-8 char. - let multibyte_mask = lsx_vmskltz_b(chunk); - // Create a bit mask from the comparison results. - let multibyte_mask = lsx_vpickve2gr_w::<0>(multibyte_mask); - - // If the bit mask is all zero, we only have ASCII chars here: - if multibyte_mask == 0 { - assert!(intra_chunk_offset == 0); - - // Check for newlines in the chunk - let newlines_test = lsx_vseqi_b::<{b'\n' as i32}>(chunk); - let newlines_mask = lsx_vmskltz_b(newlines_test); - let mut newlines_mask = lsx_vpickve2gr_w::<0>(newlines_mask); - - let output_offset = RelativeBytePos::from_usize(chunk_index * CHUNK_SIZE + 1); - - while newlines_mask != 0 { - let index = newlines_mask.trailing_zeros(); - - lines.push(RelativeBytePos(index) + output_offset); - - // Clear the bit, so we can find the next one. - newlines_mask &= newlines_mask - 1; - } - } else { - // The slow path. - // There are multibyte chars in here, fallback to generic decoding. - let scan_start = chunk_index * CHUNK_SIZE + intra_chunk_offset; - intra_chunk_offset = analyze_source_file_generic( - &src[scan_start..], - CHUNK_SIZE - intra_chunk_offset, - RelativeBytePos::from_usize(scan_start), - lines, - multi_byte_chars, - ); - } - } - - // There might still be a tail left to analyze - let tail_start = src.len() - tail.len() + intra_chunk_offset; - if tail_start < src.len() { - analyze_source_file_generic( - &src[tail_start..], - src.len() - tail_start, - RelativeBytePos::from_usize(tail_start), - lines, - multi_byte_chars, - ); - } - } - } _ => { - // The target (or compiler version) does not support vector instructions - // our specialized implementations need (x86 SSE2, loongarch64 LSX)... + // The target (or compiler version) does not support SSE2 ... fn analyze_source_file_dispatch( src: &str, lines: &mut Vec, diff --git a/compiler/rustc_span/src/lib.rs b/compiler/rustc_span/src/lib.rs index 8907c5e4c4ae..ae6755f07642 100644 --- a/compiler/rustc_span/src/lib.rs +++ b/compiler/rustc_span/src/lib.rs @@ -18,7 +18,6 @@ // tidy-alphabetical-start #![allow(internal_features)] #![cfg_attr(bootstrap, feature(round_char_boundary))] -#![cfg_attr(target_arch = "loongarch64", feature(stdarch_loongarch))] #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")] #![doc(rust_logo)] #![feature(array_windows)] diff --git a/compiler/rustc_symbol_mangling/src/v0.rs b/compiler/rustc_symbol_mangling/src/v0.rs index 0cbd48ba08c4..0655c2d5e814 100644 --- a/compiler/rustc_symbol_mangling/src/v0.rs +++ b/compiler/rustc_symbol_mangling/src/v0.rs @@ -82,9 +82,13 @@ pub(super) fn mangle<'tcx>( } pub fn mangle_internal_symbol<'tcx>(tcx: TyCtxt<'tcx>, item_name: &str) -> String { - if item_name == "rust_eh_personality" { + match item_name { // rust_eh_personality must not be renamed as LLVM hard-codes the name - return "rust_eh_personality".to_owned(); + "rust_eh_personality" => return item_name.to_owned(), + // Apple availability symbols need to not be mangled to be usable by + // C/Objective-C code. + "__isPlatformVersionAtLeast" | "__isOSVersionAtLeast" => return item_name.to_owned(), + _ => {} } let prefix = "_R"; diff --git a/compiler/rustc_target/src/callconv/loongarch.rs b/compiler/rustc_target/src/callconv/loongarch.rs index d567ad401bb1..9213d73e24ea 100644 --- a/compiler/rustc_target/src/callconv/loongarch.rs +++ b/compiler/rustc_target/src/callconv/loongarch.rs @@ -8,16 +8,16 @@ use crate::spec::HasTargetSpec; #[derive(Copy, Clone)] enum RegPassKind { - Float(Reg), - Integer(Reg), + Float { offset_from_start: Size, ty: Reg }, + Integer { offset_from_start: Size, ty: Reg }, Unknown, } #[derive(Copy, Clone)] enum FloatConv { - FloatPair(Reg, Reg), + FloatPair { first_ty: Reg, second_ty_offset_from_start: Size, second_ty: Reg }, Float(Reg), - MixedPair(Reg, Reg), + MixedPair { first_ty: Reg, second_ty_offset_from_start: Size, second_ty: Reg }, } #[derive(Copy, Clone)] @@ -37,6 +37,7 @@ fn should_use_fp_conv_helper<'a, Ty, C>( flen: u64, field1_kind: &mut RegPassKind, field2_kind: &mut RegPassKind, + offset_from_start: Size, ) -> Result<(), CannotUseFpConv> where Ty: TyAbiInterface<'a, C> + Copy, @@ -49,16 +50,16 @@ where } match (*field1_kind, *field2_kind) { (RegPassKind::Unknown, _) => { - *field1_kind = RegPassKind::Integer(Reg { - kind: RegKind::Integer, - size: arg_layout.size, - }); + *field1_kind = RegPassKind::Integer { + offset_from_start, + ty: Reg { kind: RegKind::Integer, size: arg_layout.size }, + }; } - (RegPassKind::Float(_), RegPassKind::Unknown) => { - *field2_kind = RegPassKind::Integer(Reg { - kind: RegKind::Integer, - size: arg_layout.size, - }); + (RegPassKind::Float { .. }, RegPassKind::Unknown) => { + *field2_kind = RegPassKind::Integer { + offset_from_start, + ty: Reg { kind: RegKind::Integer, size: arg_layout.size }, + }; } _ => return Err(CannotUseFpConv), } @@ -69,12 +70,16 @@ where } match (*field1_kind, *field2_kind) { (RegPassKind::Unknown, _) => { - *field1_kind = - RegPassKind::Float(Reg { kind: RegKind::Float, size: arg_layout.size }); + *field1_kind = RegPassKind::Float { + offset_from_start, + ty: Reg { kind: RegKind::Float, size: arg_layout.size }, + }; } (_, RegPassKind::Unknown) => { - *field2_kind = - RegPassKind::Float(Reg { kind: RegKind::Float, size: arg_layout.size }); + *field2_kind = RegPassKind::Float { + offset_from_start, + ty: Reg { kind: RegKind::Float, size: arg_layout.size }, + }; } _ => return Err(CannotUseFpConv), } @@ -96,13 +101,14 @@ where flen, field1_kind, field2_kind, + offset_from_start, ); } return Err(CannotUseFpConv); } } FieldsShape::Array { count, .. } => { - for _ in 0..count { + for i in 0..count { let elem_layout = arg_layout.field(cx, 0); should_use_fp_conv_helper( cx, @@ -111,6 +117,7 @@ where flen, field1_kind, field2_kind, + offset_from_start + elem_layout.size * i, )?; } } @@ -121,7 +128,15 @@ where } for i in arg_layout.fields.index_by_increasing_offset() { let field = arg_layout.field(cx, i); - should_use_fp_conv_helper(cx, &field, xlen, flen, field1_kind, field2_kind)?; + should_use_fp_conv_helper( + cx, + &field, + xlen, + flen, + field1_kind, + field2_kind, + offset_from_start + arg_layout.fields.offset(i), + )?; } } }, @@ -140,14 +155,52 @@ where { let mut field1_kind = RegPassKind::Unknown; let mut field2_kind = RegPassKind::Unknown; - if should_use_fp_conv_helper(cx, arg, xlen, flen, &mut field1_kind, &mut field2_kind).is_err() { + if should_use_fp_conv_helper( + cx, + arg, + xlen, + flen, + &mut field1_kind, + &mut field2_kind, + Size::ZERO, + ) + .is_err() + { return None; } match (field1_kind, field2_kind) { - (RegPassKind::Integer(l), RegPassKind::Float(r)) => Some(FloatConv::MixedPair(l, r)), - (RegPassKind::Float(l), RegPassKind::Integer(r)) => Some(FloatConv::MixedPair(l, r)), - (RegPassKind::Float(l), RegPassKind::Float(r)) => Some(FloatConv::FloatPair(l, r)), - (RegPassKind::Float(f), RegPassKind::Unknown) => Some(FloatConv::Float(f)), + ( + RegPassKind::Integer { offset_from_start, .. } + | RegPassKind::Float { offset_from_start, .. }, + _, + ) if offset_from_start != Size::ZERO => { + panic!("type {:?} has a first field with non-zero offset {offset_from_start:?}", arg.ty) + } + ( + RegPassKind::Integer { ty: first_ty, .. }, + RegPassKind::Float { offset_from_start, ty: second_ty }, + ) => Some(FloatConv::MixedPair { + first_ty, + second_ty_offset_from_start: offset_from_start, + second_ty, + }), + ( + RegPassKind::Float { ty: first_ty, .. }, + RegPassKind::Integer { offset_from_start, ty: second_ty }, + ) => Some(FloatConv::MixedPair { + first_ty, + second_ty_offset_from_start: offset_from_start, + second_ty, + }), + ( + RegPassKind::Float { ty: first_ty, .. }, + RegPassKind::Float { offset_from_start, ty: second_ty }, + ) => Some(FloatConv::FloatPair { + first_ty, + second_ty_offset_from_start: offset_from_start, + second_ty, + }), + (RegPassKind::Float { ty, .. }, RegPassKind::Unknown) => Some(FloatConv::Float(ty)), _ => None, } } @@ -165,11 +218,19 @@ where FloatConv::Float(f) => { arg.cast_to(f); } - FloatConv::FloatPair(l, r) => { - arg.cast_to(CastTarget::pair(l, r)); + FloatConv::FloatPair { first_ty, second_ty_offset_from_start, second_ty } => { + arg.cast_to(CastTarget::offset_pair( + first_ty, + second_ty_offset_from_start, + second_ty, + )); } - FloatConv::MixedPair(l, r) => { - arg.cast_to(CastTarget::pair(l, r)); + FloatConv::MixedPair { first_ty, second_ty_offset_from_start, second_ty } => { + arg.cast_to(CastTarget::offset_pair( + first_ty, + second_ty_offset_from_start, + second_ty, + )); } } return false; @@ -233,15 +294,27 @@ fn classify_arg<'a, Ty, C>( arg.cast_to(f); return; } - Some(FloatConv::FloatPair(l, r)) if *avail_fprs >= 2 => { + Some(FloatConv::FloatPair { first_ty, second_ty_offset_from_start, second_ty }) + if *avail_fprs >= 2 => + { *avail_fprs -= 2; - arg.cast_to(CastTarget::pair(l, r)); + arg.cast_to(CastTarget::offset_pair( + first_ty, + second_ty_offset_from_start, + second_ty, + )); return; } - Some(FloatConv::MixedPair(l, r)) if *avail_fprs >= 1 && *avail_gprs >= 1 => { + Some(FloatConv::MixedPair { first_ty, second_ty_offset_from_start, second_ty }) + if *avail_fprs >= 1 && *avail_gprs >= 1 => + { *avail_gprs -= 1; *avail_fprs -= 1; - arg.cast_to(CastTarget::pair(l, r)); + arg.cast_to(CastTarget::offset_pair( + first_ty, + second_ty_offset_from_start, + second_ty, + )); return; } _ => (), diff --git a/compiler/rustc_trait_selection/src/error_reporting/infer/mod.rs b/compiler/rustc_trait_selection/src/error_reporting/infer/mod.rs index 9447612d026b..812e20e43382 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/infer/mod.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/infer/mod.rs @@ -318,7 +318,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { let (expected, found) = if expected_str == found_str { (join_path_syms(&expected_abs), join_path_syms(&found_abs)) } else { - (expected_str.clone(), found_str.clone()) + (expected_str, found_str) }; // We've displayed "expected `a::b`, found `a::b`". We add context to diff --git a/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs b/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs index 40a27c9aebe2..f6dbbeb51cab 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/traits/suggestions.rs @@ -32,8 +32,8 @@ use rustc_middle::ty::print::{ }; use rustc_middle::ty::{ self, AdtKind, GenericArgs, InferTy, IsSuggestable, Ty, TyCtxt, TypeFoldable, TypeFolder, - TypeSuperFoldable, TypeVisitableExt, TypeckResults, Upcast, suggest_arbitrary_trait_bound, - suggest_constraining_type_param, + TypeSuperFoldable, TypeSuperVisitable, TypeVisitableExt, TypeVisitor, TypeckResults, Upcast, + suggest_arbitrary_trait_bound, suggest_constraining_type_param, }; use rustc_middle::{bug, span_bug}; use rustc_span::def_id::LocalDefId; @@ -263,6 +263,9 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { _ => (false, None), }; + let mut finder = ParamFinder { .. }; + finder.visit_binder(&trait_pred); + // FIXME: Add check for trait bound that is already present, particularly `?Sized` so we // don't suggest `T: Sized + ?Sized`. loop { @@ -411,6 +414,26 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { } } + hir::Node::TraitItem(hir::TraitItem { + generics, + kind: hir::TraitItemKind::Fn(..), + .. + }) + | hir::Node::ImplItem(hir::ImplItem { + generics, + trait_item_def_id: None, + kind: hir::ImplItemKind::Fn(..), + .. + }) if finder.can_suggest_bound(generics) => { + // Missing generic type parameter bound. + suggest_arbitrary_trait_bound( + self.tcx, + generics, + err, + trait_pred, + associated_ty, + ); + } hir::Node::Item(hir::Item { kind: hir::ItemKind::Struct(_, generics, _) @@ -423,7 +446,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { | hir::ItemKind::Const(_, generics, _, _) | hir::ItemKind::TraitAlias(_, generics, _), .. - }) if !param_ty => { + }) if finder.can_suggest_bound(generics) => { // Missing generic type parameter bound. if suggest_arbitrary_trait_bound( self.tcx, @@ -5068,8 +5091,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { // Suggesting `T: ?Sized` is only valid in an ADT if `T` is only used in a // borrow. `struct S<'a, T: ?Sized>(&'a T);` is valid, `struct S(T);` // is not. Look for invalid "bare" parameter uses, and suggest using indirection. - let mut visitor = - FindTypeParam { param: param.name.ident().name, invalid_spans: vec![], nested: false }; + let mut visitor = FindTypeParam { param: param.name.ident().name, .. }; visitor.visit_item(item); if visitor.invalid_spans.is_empty() { return false; @@ -5228,7 +5250,7 @@ fn hint_missing_borrow<'tcx>( /// Used to suggest replacing associated types with an explicit type in `where` clauses. #[derive(Debug)] pub struct SelfVisitor<'v> { - pub paths: Vec<&'v hir::Ty<'v>>, + pub paths: Vec<&'v hir::Ty<'v>> = Vec::new(), pub name: Option, } @@ -5599,7 +5621,7 @@ fn point_at_assoc_type_restriction( ); // Search for the associated type `Self::{name}`, get // its type and suggest replacing the bound with it. - let mut visitor = SelfVisitor { paths: vec![], name: Some(name) }; + let mut visitor = SelfVisitor { name: Some(name), .. }; visitor.visit_trait_ref(trait_ref); for path in visitor.paths { err.span_suggestion_verbose( @@ -5610,7 +5632,7 @@ fn point_at_assoc_type_restriction( ); } } else { - let mut visitor = SelfVisitor { paths: vec![], name: None }; + let mut visitor = SelfVisitor { name: None, .. }; visitor.visit_trait_ref(trait_ref); let span: MultiSpan = visitor.paths.iter().map(|p| p.span).collect::>().into(); @@ -5640,8 +5662,8 @@ fn get_deref_type_and_refs(mut ty: Ty<'_>) -> (Ty<'_>, Vec) { /// `param: ?Sized` would be a valid constraint. struct FindTypeParam { param: rustc_span::Symbol, - invalid_spans: Vec, - nested: bool, + invalid_spans: Vec = Vec::new(), + nested: bool = false, } impl<'v> Visitor<'v> for FindTypeParam { @@ -5679,3 +5701,38 @@ impl<'v> Visitor<'v> for FindTypeParam { } } } + +/// Look for type parameters in predicates. We use this to identify whether a bound is suitable in +/// on a given item. +struct ParamFinder { + params: Vec = Vec::new(), +} + +impl<'tcx> TypeVisitor> for ParamFinder { + fn visit_ty(&mut self, t: Ty<'tcx>) -> Self::Result { + match t.kind() { + ty::Param(p) => self.params.push(p.name), + _ => {} + } + t.super_visit_with(self) + } +} + +impl ParamFinder { + /// Whether the `hir::Generics` of the current item can suggest the evaluated bound because its + /// references to type parameters are present in the generics. + fn can_suggest_bound(&self, generics: &hir::Generics<'_>) -> bool { + if self.params.is_empty() { + // There are no references to type parameters at all, so suggesting the bound + // would be reasonable. + return true; + } + generics.params.iter().any(|p| match p.name { + hir::ParamName::Plain(p_name) => { + // All of the parameters in the bound can be referenced in the current item. + self.params.iter().any(|p| *p == p_name.name || *p == kw::SelfUpper) + } + _ => true, + }) + } +} diff --git a/compiler/rustc_trait_selection/src/lib.rs b/compiler/rustc_trait_selection/src/lib.rs index e2b22f7bab74..fc0cf8f140a7 100644 --- a/compiler/rustc_trait_selection/src/lib.rs +++ b/compiler/rustc_trait_selection/src/lib.rs @@ -19,6 +19,7 @@ #![feature(assert_matches)] #![feature(associated_type_defaults)] #![feature(box_patterns)] +#![feature(default_field_values)] #![feature(if_let_guard)] #![feature(iter_intersperse)] #![feature(iterator_try_reduce)] diff --git a/library/Cargo.lock b/library/Cargo.lock index c16bb3eafbda..e601137e0057 100644 --- a/library/Cargo.lock +++ b/library/Cargo.lock @@ -328,7 +328,7 @@ dependencies = [ "std_detect", "unwind", "wasi 0.11.1+wasi-snapshot-preview1", - "wasi 0.14.3+wasi-0.2.4", + "wasi 0.14.4+wasi-0.2.4", "windows-targets 0.0.0", ] @@ -402,9 +402,9 @@ dependencies = [ [[package]] name = "wasi" -version = "0.14.3+wasi-0.2.4" +version = "0.14.4+wasi-0.2.4" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "6a51ae83037bdd272a9e28ce236db8c07016dd0d50c27038b3f407533c030c95" +checksum = "88a5f4a424faf49c3c2c344f166f0662341d470ea185e939657aaff130f0ec4a" dependencies = [ "rustc-std-workspace-alloc", "rustc-std-workspace-core", diff --git a/library/core/src/borrow.rs b/library/core/src/borrow.rs index 6ce7e4656b99..78ba69fec142 100644 --- a/library/core/src/borrow.rs +++ b/library/core/src/borrow.rs @@ -154,9 +154,8 @@ /// [`String`]: ../../std/string/struct.String.html #[stable(feature = "rust1", since = "1.0.0")] #[rustc_diagnostic_item = "Borrow"] -#[const_trait] #[rustc_const_unstable(feature = "const_convert", issue = "143773")] -pub trait Borrow { +pub const trait Borrow { /// Immutably borrows from an owned value. /// /// # Examples @@ -187,9 +186,8 @@ pub trait Borrow { /// for more information on borrowing as another type. #[stable(feature = "rust1", since = "1.0.0")] #[rustc_diagnostic_item = "BorrowMut"] -#[const_trait] #[rustc_const_unstable(feature = "const_convert", issue = "143773")] -pub trait BorrowMut: Borrow { +pub const trait BorrowMut: Borrow { /// Mutably borrows from an owned value. /// /// # Examples diff --git a/library/core/src/clone.rs b/library/core/src/clone.rs index 0add77b2bc89..7f2a40f753fa 100644 --- a/library/core/src/clone.rs +++ b/library/core/src/clone.rs @@ -191,8 +191,7 @@ mod uninit; #[rustc_diagnostic_item = "Clone"] #[rustc_trivial_field_reads] #[rustc_const_unstable(feature = "const_clone", issue = "142757")] -#[const_trait] -pub trait Clone: Sized { +pub const trait Clone: Sized { /// Returns a duplicate of the value. /// /// Note that what "duplicate" means varies by type: diff --git a/library/core/src/cmp.rs b/library/core/src/cmp.rs index ab018fa26750..0812322f3fbb 100644 --- a/library/core/src/cmp.rs +++ b/library/core/src/cmp.rs @@ -247,9 +247,8 @@ use crate::ops::ControlFlow; append_const_msg )] #[rustc_diagnostic_item = "PartialEq"] -#[const_trait] #[rustc_const_unstable(feature = "const_cmp", issue = "143800")] -pub trait PartialEq: PointeeSized { +pub const trait PartialEq: PointeeSized { /// Tests for `self` and `other` values to be equal, and is used by `==`. #[must_use] #[stable(feature = "rust1", since = "1.0.0")] diff --git a/library/core/src/cmp/bytewise.rs b/library/core/src/cmp/bytewise.rs index a06a6e8b69a2..2265fa7a3531 100644 --- a/library/core/src/cmp/bytewise.rs +++ b/library/core/src/cmp/bytewise.rs @@ -17,7 +17,7 @@ use crate::num::NonZero; /// - Neither `Self` nor `Rhs` have provenance, so integer comparisons are correct. /// - `>::{eq,ne}` are equivalent to comparing the bytes. #[rustc_specialization_trait] -#[const_trait] +#[const_trait] // FIXME(const_trait_impl): Migrate to `const unsafe trait` once #146122 is fixed. pub(crate) unsafe trait BytewiseEq: [const] PartialEq + Sized { diff --git a/library/core/src/convert/mod.rs b/library/core/src/convert/mod.rs index add21b491ad0..a3cfd85974a4 100644 --- a/library/core/src/convert/mod.rs +++ b/library/core/src/convert/mod.rs @@ -216,9 +216,8 @@ pub const fn identity(x: T) -> T { /// ``` #[stable(feature = "rust1", since = "1.0.0")] #[rustc_diagnostic_item = "AsRef"] -#[const_trait] #[rustc_const_unstable(feature = "const_convert", issue = "143773")] -pub trait AsRef: PointeeSized { +pub const trait AsRef: PointeeSized { /// Converts this type into a shared reference of the (usually inferred) input type. #[stable(feature = "rust1", since = "1.0.0")] fn as_ref(&self) -> &T; @@ -369,9 +368,8 @@ pub trait AsRef: PointeeSized { /// `&mut Vec`, for example, is the better choice (callers need to pass the correct type then). #[stable(feature = "rust1", since = "1.0.0")] #[rustc_diagnostic_item = "AsMut"] -#[const_trait] #[rustc_const_unstable(feature = "const_convert", issue = "143773")] -pub trait AsMut: PointeeSized { +pub const trait AsMut: PointeeSized { /// Converts this type into a mutable reference of the (usually inferred) input type. #[stable(feature = "rust1", since = "1.0.0")] fn as_mut(&mut self) -> &mut T; @@ -450,8 +448,7 @@ pub trait AsMut: PointeeSized { #[stable(feature = "rust1", since = "1.0.0")] #[doc(search_unbox)] #[rustc_const_unstable(feature = "const_convert", issue = "143773")] -#[const_trait] -pub trait Into: Sized { +pub const trait Into: Sized { /// Converts this type into the (usually inferred) input type. #[must_use] #[stable(feature = "rust1", since = "1.0.0")] @@ -587,8 +584,7 @@ pub trait Into: Sized { ))] #[doc(search_unbox)] #[rustc_const_unstable(feature = "const_convert", issue = "143773")] -#[const_trait] -pub trait From: Sized { +pub const trait From: Sized { /// Converts to this type from the input type. #[rustc_diagnostic_item = "from_fn"] #[must_use] @@ -616,8 +612,7 @@ pub trait From: Sized { #[rustc_diagnostic_item = "TryInto"] #[stable(feature = "try_from", since = "1.34.0")] #[rustc_const_unstable(feature = "const_convert", issue = "143773")] -#[const_trait] -pub trait TryInto: Sized { +pub const trait TryInto: Sized { /// The type returned in the event of a conversion error. #[stable(feature = "try_from", since = "1.34.0")] type Error; @@ -696,8 +691,7 @@ pub trait TryInto: Sized { #[rustc_diagnostic_item = "TryFrom"] #[stable(feature = "try_from", since = "1.34.0")] #[rustc_const_unstable(feature = "const_convert", issue = "143773")] -#[const_trait] -pub trait TryFrom: Sized { +pub const trait TryFrom: Sized { /// The type returned in the event of a conversion error. #[stable(feature = "try_from", since = "1.34.0")] type Error; diff --git a/library/core/src/default.rs b/library/core/src/default.rs index 897267968aac..cc9289307c1d 100644 --- a/library/core/src/default.rs +++ b/library/core/src/default.rs @@ -103,9 +103,8 @@ use crate::ascii::Char as AsciiChar; /// ``` #[rustc_diagnostic_item = "Default"] #[stable(feature = "rust1", since = "1.0.0")] -#[const_trait] #[rustc_const_unstable(feature = "const_default", issue = "143894")] -pub trait Default: Sized { +pub const trait Default: Sized { /// Returns the "default value" for a type. /// /// Default values are often some kind of initial value, identity value, or anything else that diff --git a/library/core/src/fmt/num.rs b/library/core/src/fmt/num.rs index 605ba42c541f..253a7b7587e4 100644 --- a/library/core/src/fmt/num.rs +++ b/library/core/src/fmt/num.rs @@ -3,7 +3,7 @@ use crate::fmt::NumBuffer; use crate::mem::MaybeUninit; use crate::num::fmt as numfmt; -use crate::{fmt, ptr, slice, str}; +use crate::{fmt, str}; /// Formatting of integers with a non-decimal radix. macro_rules! radix_integer { @@ -96,8 +96,8 @@ macro_rules! impl_Debug { }; } -// 2 digit decimal look up table -static DEC_DIGITS_LUT: &[u8; 200] = b"\ +// The string of all two-digit numbers in range 00..99 is used as a lookup table. +static DECIMAL_PAIRS: &[u8; 200] = b"\ 0001020304050607080910111213141516171819\ 2021222324252627282930313233343536373839\ 4041424344454647484950515253545556575859\ @@ -123,6 +123,9 @@ macro_rules! impl_Display { $( const _: () = { + assert!($Signed::MIN < 0, "need signed"); + assert!($Unsigned::MIN == 0, "need unsigned"); + assert!($Signed::BITS == $Unsigned::BITS, "need counterparts"); assert!($Signed::BITS <= $T::BITS, "need lossless conversion"); assert!($Unsigned::BITS <= $T::BITS, "need lossless conversion"); }; @@ -207,10 +210,10 @@ macro_rules! impl_Display { remain /= scale; let pair1 = (quad / 100) as usize; let pair2 = (quad % 100) as usize; - buf[offset + 0].write(DEC_DIGITS_LUT[pair1 * 2 + 0]); - buf[offset + 1].write(DEC_DIGITS_LUT[pair1 * 2 + 1]); - buf[offset + 2].write(DEC_DIGITS_LUT[pair2 * 2 + 0]); - buf[offset + 3].write(DEC_DIGITS_LUT[pair2 * 2 + 1]); + buf[offset + 0].write(DECIMAL_PAIRS[pair1 * 2 + 0]); + buf[offset + 1].write(DECIMAL_PAIRS[pair1 * 2 + 1]); + buf[offset + 2].write(DECIMAL_PAIRS[pair2 * 2 + 0]); + buf[offset + 3].write(DECIMAL_PAIRS[pair2 * 2 + 1]); } // Format per two digits from the lookup table. @@ -225,8 +228,8 @@ macro_rules! impl_Display { let pair = (remain % 100) as usize; remain /= 100; - buf[offset + 0].write(DEC_DIGITS_LUT[pair * 2 + 0]); - buf[offset + 1].write(DEC_DIGITS_LUT[pair * 2 + 1]); + buf[offset + 0].write(DECIMAL_PAIRS[pair * 2 + 0]); + buf[offset + 1].write(DECIMAL_PAIRS[pair * 2 + 1]); } // Format the last remaining digit, if any. @@ -242,7 +245,7 @@ macro_rules! impl_Display { // Either the compiler sees that remain < 10, or it prevents // a boundary check up next. let last = (remain & 15) as usize; - buf[offset].write(DEC_DIGITS_LUT[last * 2 + 1]); + buf[offset].write(DECIMAL_PAIRS[last * 2 + 1]); // not used: remain = 0; } @@ -335,7 +338,6 @@ macro_rules! impl_Display { } } - )* #[cfg(feature = "optimize_for_size")] @@ -374,178 +376,213 @@ macro_rules! impl_Display { macro_rules! impl_Exp { ($($Signed:ident, $Unsigned:ident),* ; as $T:ident into $fmt_fn:ident) => { + const _: () = assert!($T::MIN == 0, "need unsigned"); + fn $fmt_fn( - mut n: $T, + f: &mut fmt::Formatter<'_>, + n: $T, is_nonnegative: bool, - upper: bool, - f: &mut fmt::Formatter<'_> + letter_e: u8 ) -> fmt::Result { - let (mut n, mut exponent, trailing_zeros, added_precision) = { - let mut exponent = 0; - // count and remove trailing decimal zeroes - while n % 10 == 0 && n >= 10 { - n /= 10; - exponent += 1; - } - let (added_precision, subtracted_precision) = match f.precision() { - Some(fmt_prec) => { - // number of decimal digits minus 1 - let mut tmp = n; - let mut prec = 0; - while tmp >= 10 { - tmp /= 10; - prec += 1; - } - (fmt_prec.saturating_sub(prec), prec.saturating_sub(fmt_prec)) + debug_assert!(letter_e.is_ascii_alphabetic(), "single-byte character"); + + // Print the integer as a coefficient in range (-10, 10). + let mut exp = n.checked_ilog10().unwrap_or(0) as usize; + debug_assert!(n / (10 as $T).pow(exp as u32) < 10); + + // Precisison is counted as the number of digits in the fraction. + let mut coef_prec = exp; + // Keep the digits as an integer (paired with its coef_prec count). + let mut coef = n; + + // A Formatter may set the precision to a fixed number of decimals. + let more_prec = match f.precision() { + None => { + // Omit any and all trailing zeroes. + while coef_prec != 0 && coef % 10 == 0 { + coef /= 10; + coef_prec -= 1; } - None => (0, 0) - }; - for _ in 1..subtracted_precision { - n /= 10; - exponent += 1; - } - if subtracted_precision != 0 { - let rem = n % 10; - n /= 10; - exponent += 1; - // round up last digit, round to even on a tie - if rem > 5 || (rem == 5 && (n % 2 != 0 || subtracted_precision > 1 )) { - n += 1; - // if the digit is rounded to the next power - // instead adjust the exponent - if n.ilog10() > (n - 1).ilog10() { - n /= 10; - exponent += 1; - } + 0 + }, + + Some(fmt_prec) if fmt_prec >= coef_prec => { + // Count the number of additional zeroes needed. + fmt_prec - coef_prec + }, + + Some(fmt_prec) => { + // Count the number of digits to drop. + let less_prec = coef_prec - fmt_prec; + assert!(less_prec > 0); + // Scale down the coefficient/precision pair. For example, + // coef 123456 gets coef_prec 5 (to make 1.23456). To format + // the number with 2 decimals, i.e., fmt_prec 2, coef should + // be scaled by 10⁵⁻²=1000 to get coef 123 with coef_prec 2. + + // SAFETY: Any precision less than coef_prec will cause a + // power of ten below the coef value. + let scale = unsafe { + (10 as $T).checked_pow(less_prec as u32).unwrap_unchecked() + }; + let floor = coef / scale; + // Round half to even conform documentation. + let over = coef % scale; + let half = scale / 2; + let round_up = if over < half { + 0 + } else if over > half { + 1 + } else { + floor & 1 // round odd up to even + }; + // Adding one to a scale down of at least 10 won't overflow. + coef = floor + round_up; + coef_prec = fmt_prec; + + // The round_up may have caused the coefficient to reach 10 + // (which is not permitted). For example, anything in range + // [9.95, 10) becomes 10.0 when adjusted to precision 1. + if round_up != 0 && coef.checked_ilog10().unwrap_or(0) as usize > coef_prec { + debug_assert_eq!(coef, (10 as $T).pow(coef_prec as u32 + 1)); + coef /= 10; // drop one trailing zero + exp += 1; // one power of ten higher } - } - (n, exponent, exponent, added_precision) + 0 + }, }; - // Since `curr` always decreases by the number of digits copied, this means - // that `curr >= 0`. - let mut buf = [MaybeUninit::::uninit(); 40]; - let mut curr = buf.len(); //index for buf - let buf_ptr = MaybeUninit::slice_as_mut_ptr(&mut buf); - let lut_ptr = DEC_DIGITS_LUT.as_ptr(); + // Allocate a text buffer with lazy initialization. + const MAX_DEC_N: usize = $T::MAX.ilog10() as usize + 1; + const MAX_COEF_LEN: usize = MAX_DEC_N + ".".len(); + const MAX_TEXT_LEN: usize = MAX_COEF_LEN + "e99".len(); + let mut buf = [MaybeUninit::::uninit(); MAX_TEXT_LEN]; - // decode 2 chars at a time - while n >= 100 { - let d1 = ((n % 100) as usize) << 1; - curr -= 2; - // SAFETY: `d1 <= 198`, so we can copy from `lut_ptr[d1..d1 + 2]` since - // `DEC_DIGITS_LUT` has a length of 200. - unsafe { - ptr::copy_nonoverlapping(lut_ptr.add(d1), buf_ptr.add(curr), 2); - } - n /= 100; - exponent += 2; - } - // n is <= 99, so at most 2 chars long - let mut n = n as isize; // possibly reduce 64bit math - // decode second-to-last character - if n >= 10 { - curr -= 1; - // SAFETY: Safe since `40 > curr >= 0` (see comment) - unsafe { - *buf_ptr.add(curr) = (n as u8 % 10_u8) + b'0'; - } - n /= 10; - exponent += 1; - } - // add decimal point iff >1 mantissa digit will be printed - if exponent != trailing_zeros || added_precision != 0 { - curr -= 1; - // SAFETY: Safe since `40 > curr >= 0` - unsafe { - *buf_ptr.add(curr) = b'.'; - } - } - - // SAFETY: Safe since `40 > curr >= 0` - let buf_slice = unsafe { - // decode last character - curr -= 1; - *buf_ptr.add(curr) = (n as u8) + b'0'; - - let len = buf.len() - curr as usize; - slice::from_raw_parts(buf_ptr.add(curr), len) - }; - - // stores 'e' (or 'E') and the up to 2-digit exponent - let mut exp_buf = [MaybeUninit::::uninit(); 3]; - let exp_ptr = MaybeUninit::slice_as_mut_ptr(&mut exp_buf); - // SAFETY: In either case, `exp_buf` is written within bounds and `exp_ptr[..len]` - // is contained within `exp_buf` since `len <= 3`. - let exp_slice = unsafe { - *exp_ptr.add(0) = if upper { b'E' } else { b'e' }; - let len = if exponent < 10 { - *exp_ptr.add(1) = (exponent as u8) + b'0'; - 2 - } else { - let off = exponent << 1; - ptr::copy_nonoverlapping(lut_ptr.add(off), exp_ptr.add(1), 2); - 3 - }; - slice::from_raw_parts(exp_ptr, len) - }; - - let parts = &[ - numfmt::Part::Copy(buf_slice), - numfmt::Part::Zero(added_precision), - numfmt::Part::Copy(exp_slice), - ]; - let sign = if !is_nonnegative { - "-" - } else if f.sign_plus() { - "+" + // Encode the coefficient in buf[..coef_len]. + let (lead_dec, coef_len) = if coef_prec == 0 && more_prec == 0 { + (coef, 1_usize) // single digit; no fraction } else { - "" + buf[1].write(b'.'); + let fraction_range = 2..(2 + coef_prec); + + // Consume the least-significant decimals from a working copy. + let mut remain = coef; + #[cfg(feature = "optimize_for_size")] { + for i in fraction_range.clone().rev() { + let digit = (remain % 10) as usize; + remain /= 10; + buf[i].write(b'0' + digit as u8); + } + } + #[cfg(not(feature = "optimize_for_size"))] { + // Write digits per two at a time with a lookup table. + for i in fraction_range.clone().skip(1).rev().step_by(2) { + let pair = (remain % 100) as usize; + remain /= 100; + buf[i - 1].write(DECIMAL_PAIRS[pair * 2 + 0]); + buf[i - 0].write(DECIMAL_PAIRS[pair * 2 + 1]); + } + // An odd number of digits leave one digit remaining. + if coef_prec & 1 != 0 { + let digit = (remain % 10) as usize; + remain /= 10; + buf[fraction_range.start].write(b'0' + digit as u8); + } + } + + (remain, fraction_range.end) }; - let formatted = numfmt::Formatted { sign, parts }; - // SAFETY: `buf_slice` and `exp_slice` contain only ASCII characters. - unsafe { f.pad_formatted_parts(&formatted) } + debug_assert!(lead_dec < 10); + debug_assert!(lead_dec != 0 || coef == 0, "significant digits only"); + buf[0].write(b'0' + lead_dec as u8); + + // SAFETY: The number of decimals is limited, captured by MAX. + unsafe { core::hint::assert_unchecked(coef_len <= MAX_COEF_LEN) } + // Encode the scale factor in buf[coef_len..text_len]. + buf[coef_len].write(letter_e); + let text_len: usize = match exp { + ..10 => { + buf[coef_len + 1].write(b'0' + exp as u8); + coef_len + 2 + }, + 10..100 => { + #[cfg(feature = "optimize_for_size")] { + buf[coef_len + 1].write(b'0' + (exp / 10) as u8); + buf[coef_len + 2].write(b'0' + (exp % 10) as u8); + } + #[cfg(not(feature = "optimize_for_size"))] { + buf[coef_len + 1].write(DECIMAL_PAIRS[exp * 2 + 0]); + buf[coef_len + 2].write(DECIMAL_PAIRS[exp * 2 + 1]); + } + coef_len + 3 + }, + _ => { + const { assert!($T::MAX.ilog10() < 100) }; + // SAFETY: A `u256::MAX` would get exponent 77. + unsafe { core::hint::unreachable_unchecked() } + } + }; + // SAFETY: All bytes up until text_len have been set. + let text = unsafe { buf[..text_len].assume_init_ref() }; + + if more_prec == 0 { + // SAFETY: Text is set with ASCII exclusively: either a decimal, + // or a LETTER_E, or a dot. ASCII implies valid UTF-8. + let as_str = unsafe { str::from_utf8_unchecked(text) }; + f.pad_integral(is_nonnegative, "", as_str) + } else { + let parts = &[ + numfmt::Part::Copy(&text[..coef_len]), + numfmt::Part::Zero(more_prec), + numfmt::Part::Copy(&text[coef_len..]), + ]; + let sign = if !is_nonnegative { + "-" + } else if f.sign_plus() { + "+" + } else { + "" + }; + // SAFETY: Text is set with ASCII exclusively: either a decimal, + // or a LETTER_E, or a dot. ASCII implies valid UTF-8. + unsafe { f.pad_formatted_parts(&numfmt::Formatted { sign, parts }) } + } } $( - #[stable(feature = "integer_exp_format", since = "1.42.0")] - impl fmt::LowerExp for $Signed { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - let is_nonnegative = *self >= 0; - let n = if is_nonnegative { - *self as $T - } else { - self.unsigned_abs() as $T - }; - $fmt_fn(n, is_nonnegative, false, f) - } + const _: () = { + assert!($Signed::MIN < 0, "need signed"); + assert!($Unsigned::MIN == 0, "need unsigned"); + assert!($Signed::BITS == $Unsigned::BITS, "need counterparts"); + assert!($Signed::BITS <= $T::BITS, "need lossless conversion"); + assert!($Unsigned::BITS <= $T::BITS, "need lossless conversion"); + }; + #[stable(feature = "integer_exp_format", since = "1.42.0")] + impl fmt::LowerExp for $Signed { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + $fmt_fn(f, self.unsigned_abs() as $T, *self >= 0, b'e') } - #[stable(feature = "integer_exp_format", since = "1.42.0")] - impl fmt::LowerExp for $Unsigned { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - $fmt_fn(*self as $T, true, false, f) - } - })* + } + #[stable(feature = "integer_exp_format", since = "1.42.0")] + impl fmt::LowerExp for $Unsigned { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + $fmt_fn(f, *self as $T, true, b'e') + } + } + #[stable(feature = "integer_exp_format", since = "1.42.0")] + impl fmt::UpperExp for $Signed { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + $fmt_fn(f, self.unsigned_abs() as $T, *self >= 0, b'E') + } + } + #[stable(feature = "integer_exp_format", since = "1.42.0")] + impl fmt::UpperExp for $Unsigned { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + $fmt_fn(f, *self as $T, true, b'E') + } + } + )* - $( - #[stable(feature = "integer_exp_format", since = "1.42.0")] - impl fmt::UpperExp for $Signed { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - let is_nonnegative = *self >= 0; - let n = if is_nonnegative { - *self as $T - } else { - self.unsigned_abs() as $T - }; - $fmt_fn(n, is_nonnegative, true, f) - } - } - #[stable(feature = "integer_exp_format", since = "1.42.0")] - impl fmt::UpperExp for $Unsigned { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - $fmt_fn(*self as $T, true, true, f) - } - })* }; } @@ -658,10 +695,10 @@ impl u128 { remain /= 1_00_00; let pair1 = (quad / 100) as usize; let pair2 = (quad % 100) as usize; - buf[offset + 0].write(DEC_DIGITS_LUT[pair1 * 2 + 0]); - buf[offset + 1].write(DEC_DIGITS_LUT[pair1 * 2 + 1]); - buf[offset + 2].write(DEC_DIGITS_LUT[pair2 * 2 + 0]); - buf[offset + 3].write(DEC_DIGITS_LUT[pair2 * 2 + 1]); + buf[offset + 0].write(DECIMAL_PAIRS[pair1 * 2 + 0]); + buf[offset + 1].write(DECIMAL_PAIRS[pair1 * 2 + 1]); + buf[offset + 2].write(DECIMAL_PAIRS[pair2 * 2 + 0]); + buf[offset + 3].write(DECIMAL_PAIRS[pair2 * 2 + 1]); } // Format per two digits from the lookup table. @@ -676,8 +713,8 @@ impl u128 { let pair = (remain % 100) as usize; remain /= 100; - buf[offset + 0].write(DEC_DIGITS_LUT[pair * 2 + 0]); - buf[offset + 1].write(DEC_DIGITS_LUT[pair * 2 + 1]); + buf[offset + 0].write(DECIMAL_PAIRS[pair * 2 + 0]); + buf[offset + 1].write(DECIMAL_PAIRS[pair * 2 + 1]); } // Format the last remaining digit, if any. @@ -693,7 +730,7 @@ impl u128 { // Either the compiler sees that remain < 10, or it prevents // a boundary check up next. let last = (remain & 15) as usize; - buf[offset].write(DEC_DIGITS_LUT[last * 2 + 1]); + buf[offset].write(DECIMAL_PAIRS[last * 2 + 1]); // not used: remain = 0; } offset @@ -792,10 +829,10 @@ fn enc_16lsd(buf: &mut [MaybeUninit], n: u64) { remain /= 1_00_00; let pair1 = (quad / 100) as usize; let pair2 = (quad % 100) as usize; - buf[quad_index * 4 + OFFSET + 0].write(DEC_DIGITS_LUT[pair1 * 2 + 0]); - buf[quad_index * 4 + OFFSET + 1].write(DEC_DIGITS_LUT[pair1 * 2 + 1]); - buf[quad_index * 4 + OFFSET + 2].write(DEC_DIGITS_LUT[pair2 * 2 + 0]); - buf[quad_index * 4 + OFFSET + 3].write(DEC_DIGITS_LUT[pair2 * 2 + 1]); + buf[quad_index * 4 + OFFSET + 0].write(DECIMAL_PAIRS[pair1 * 2 + 0]); + buf[quad_index * 4 + OFFSET + 1].write(DECIMAL_PAIRS[pair1 * 2 + 1]); + buf[quad_index * 4 + OFFSET + 2].write(DECIMAL_PAIRS[pair2 * 2 + 0]); + buf[quad_index * 4 + OFFSET + 3].write(DECIMAL_PAIRS[pair2 * 2 + 1]); } } diff --git a/library/core/src/intrinsics/fallback.rs b/library/core/src/intrinsics/fallback.rs index 96928325328a..932537f2581f 100644 --- a/library/core/src/intrinsics/fallback.rs +++ b/library/core/src/intrinsics/fallback.rs @@ -7,9 +7,8 @@ )] #![allow(missing_docs)] -#[const_trait] #[rustc_const_unstable(feature = "core_intrinsics_fallbacks", issue = "none")] -pub trait CarryingMulAdd: Copy + 'static { +pub const trait CarryingMulAdd: Copy + 'static { type Unsigned: Copy + 'static; fn carrying_mul_add( self, @@ -111,9 +110,8 @@ impl const CarryingMulAdd for i128 { } } -#[const_trait] #[rustc_const_unstable(feature = "core_intrinsics_fallbacks", issue = "none")] -pub trait DisjointBitOr: Copy + 'static { +pub const trait DisjointBitOr: Copy + 'static { /// See [`super::disjoint_bitor`]; we just need the trait indirection to handle /// different types since calling intrinsics with generics doesn't work. unsafe fn disjoint_bitor(self, other: Self) -> Self; @@ -149,9 +147,8 @@ impl_disjoint_bitor! { i8, i16, i32, i64, i128, isize, } -#[const_trait] #[rustc_const_unstable(feature = "core_intrinsics_fallbacks", issue = "none")] -pub trait FunnelShift: Copy + 'static { +pub const trait FunnelShift: Copy + 'static { /// See [`super::unchecked_funnel_shl`]; we just need the trait indirection to handle /// different types since calling intrinsics with generics doesn't work. unsafe fn unchecked_funnel_shl(self, rhs: Self, shift: u32) -> Self; diff --git a/library/core/src/marker.rs b/library/core/src/marker.rs index 73aad27afef6..d03d7a43469a 100644 --- a/library/core/src/marker.rs +++ b/library/core/src/marker.rs @@ -1057,8 +1057,7 @@ marker_impls! { #[rustc_on_unimplemented(message = "can't drop `{Self}`", append_const_msg)] #[rustc_deny_explicit_impl] #[rustc_do_not_implement_via_object] -#[const_trait] -pub trait Destruct {} +pub const trait Destruct {} /// A marker for tuple types. /// diff --git a/library/core/src/num/f128.rs b/library/core/src/num/f128.rs index 4282b1af9f20..66c892aadd08 100644 --- a/library/core/src/num/f128.rs +++ b/library/core/src/num/f128.rs @@ -832,7 +832,6 @@ impl f128 { #[unstable(feature = "f128", issue = "116909")] #[rustc_const_unstable(feature = "f128", issue = "116909")] pub const fn midpoint(self, other: f128) -> f128 { - const LO: f128 = f128::MIN_POSITIVE * 2.; const HI: f128 = f128::MAX / 2.; let (a, b) = (self, other); @@ -842,14 +841,7 @@ impl f128 { if abs_a <= HI && abs_b <= HI { // Overflow is impossible (a + b) / 2. - } else if abs_a < LO { - // Not safe to halve `a` (would underflow) - a + (b / 2.) - } else if abs_b < LO { - // Not safe to halve `b` (would underflow) - (a / 2.) + b } else { - // Safe to halve `a` and `b` (a / 2.) + (b / 2.) } } diff --git a/library/core/src/num/f16.rs b/library/core/src/num/f16.rs index 23a8661c14b7..81220065e72a 100644 --- a/library/core/src/num/f16.rs +++ b/library/core/src/num/f16.rs @@ -820,7 +820,6 @@ impl f16 { #[unstable(feature = "f16", issue = "116909")] #[rustc_const_unstable(feature = "f16", issue = "116909")] pub const fn midpoint(self, other: f16) -> f16 { - const LO: f16 = f16::MIN_POSITIVE * 2.; const HI: f16 = f16::MAX / 2.; let (a, b) = (self, other); @@ -830,14 +829,7 @@ impl f16 { if abs_a <= HI && abs_b <= HI { // Overflow is impossible (a + b) / 2. - } else if abs_a < LO { - // Not safe to halve `a` (would underflow) - a + (b / 2.) - } else if abs_b < LO { - // Not safe to halve `b` (would underflow) - (a / 2.) + b } else { - // Safe to halve `a` and `b` (a / 2.) + (b / 2.) } } diff --git a/library/core/src/num/f32.rs b/library/core/src/num/f32.rs index da08bfc59505..cefcf1d1fe2f 100644 --- a/library/core/src/num/f32.rs +++ b/library/core/src/num/f32.rs @@ -1025,7 +1025,6 @@ impl f32 { ((self as f64 + other as f64) / 2.0) as f32 } _ => { - const LO: f32 = f32::MIN_POSITIVE * 2.; const HI: f32 = f32::MAX / 2.; let (a, b) = (self, other); @@ -1035,14 +1034,7 @@ impl f32 { if abs_a <= HI && abs_b <= HI { // Overflow is impossible (a + b) / 2. - } else if abs_a < LO { - // Not safe to halve `a` (would underflow) - a + (b / 2.) - } else if abs_b < LO { - // Not safe to halve `b` (would underflow) - (a / 2.) + b } else { - // Safe to halve `a` and `b` (a / 2.) + (b / 2.) } } @@ -1954,8 +1946,8 @@ pub mod math { /// let abs_difference_x = (f32::math::abs_sub(x, 1.0) - 2.0).abs(); /// let abs_difference_y = (f32::math::abs_sub(y, 1.0) - 0.0).abs(); /// - /// assert!(abs_difference_x <= f32::EPSILON); - /// assert!(abs_difference_y <= f32::EPSILON); + /// assert!(abs_difference_x <= 1e-6); + /// assert!(abs_difference_y <= 1e-6); /// ``` /// /// _This standalone function is for testing only. @@ -2000,7 +1992,7 @@ pub mod math { /// // x^(1/3) - 2 == 0 /// let abs_difference = (f32::math::cbrt(x) - 2.0).abs(); /// - /// assert!(abs_difference <= f32::EPSILON); + /// assert!(abs_difference <= 1e-6); /// ``` /// /// _This standalone function is for testing only. diff --git a/library/core/src/num/f64.rs b/library/core/src/num/f64.rs index dc0977cb1474..9dd1141e7033 100644 --- a/library/core/src/num/f64.rs +++ b/library/core/src/num/f64.rs @@ -1026,7 +1026,6 @@ impl f64 { #[stable(feature = "num_midpoint", since = "1.85.0")] #[rustc_const_stable(feature = "num_midpoint", since = "1.85.0")] pub const fn midpoint(self, other: f64) -> f64 { - const LO: f64 = f64::MIN_POSITIVE * 2.; const HI: f64 = f64::MAX / 2.; let (a, b) = (self, other); @@ -1036,14 +1035,7 @@ impl f64 { if abs_a <= HI && abs_b <= HI { // Overflow is impossible (a + b) / 2. - } else if abs_a < LO { - // Not safe to halve `a` (would underflow) - a + (b / 2.) - } else if abs_b < LO { - // Not safe to halve `b` (would underflow) - (a / 2.) + b } else { - // Safe to halve `a` and `b` (a / 2.) + (b / 2.) } } diff --git a/library/core/src/num/int_macros.rs b/library/core/src/num/int_macros.rs index db70fb65d444..64a3dd3e8bc5 100644 --- a/library/core/src/num/int_macros.rs +++ b/library/core/src/num/int_macros.rs @@ -1413,6 +1413,66 @@ macro_rules! int_impl { } } + /// Exact shift left. Computes `self << rhs` as long as it can be reversed losslessly. + /// + /// Returns `None` if any bits that would be shifted out differ from the resulting sign bit + /// or if `rhs` >= + #[doc = concat!("`", stringify!($SelfT), "::BITS`.")] + /// Otherwise, returns `Some(self << rhs)`. + /// + /// # Examples + /// + /// ``` + /// #![feature(exact_bitshifts)] + /// + #[doc = concat!("assert_eq!(0x1", stringify!($SelfT), ".exact_shl(4), Some(0x10));")] + #[doc = concat!("assert_eq!(0x1", stringify!($SelfT), ".exact_shl(", stringify!($SelfT), "::BITS - 2), Some(1 << ", stringify!($SelfT), "::BITS - 2));")] + #[doc = concat!("assert_eq!(0x1", stringify!($SelfT), ".exact_shl(", stringify!($SelfT), "::BITS - 1), None);")] + #[doc = concat!("assert_eq!((-0x2", stringify!($SelfT), ").exact_shl(", stringify!($SelfT), "::BITS - 2), Some(-0x2 << ", stringify!($SelfT), "::BITS - 2));")] + #[doc = concat!("assert_eq!((-0x2", stringify!($SelfT), ").exact_shl(", stringify!($SelfT), "::BITS - 1), None);")] + /// ``` + #[unstable(feature = "exact_bitshifts", issue = "144336")] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const fn exact_shl(self, rhs: u32) -> Option<$SelfT> { + if rhs < self.leading_zeros() || rhs < self.leading_ones() { + // SAFETY: rhs is checked above + Some(unsafe { self.unchecked_shl(rhs) }) + } else { + None + } + } + + /// Unchecked exact shift left. Computes `self << rhs`, assuming the operation can be + /// losslessly reversed and `rhs` cannot be larger than + #[doc = concat!("`", stringify!($SelfT), "::BITS`.")] + /// + /// # Safety + /// + /// This results in undefined behavior when `rhs >= self.leading_zeros() && rhs >= + /// self.leading_ones()` i.e. when + #[doc = concat!("[`", stringify!($SelfT), "::exact_shl`]")] + /// would return `None`. + #[unstable(feature = "exact_bitshifts", issue = "144336")] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const unsafe fn unchecked_exact_shl(self, rhs: u32) -> $SelfT { + assert_unsafe_precondition!( + check_language_ub, + concat!(stringify!($SelfT), "::unchecked_exact_shl cannot shift out non-zero bits"), + ( + zeros: u32 = self.leading_zeros(), + ones: u32 = self.leading_ones(), + rhs: u32 = rhs, + ) => rhs < zeros || rhs < ones, + ); + + // SAFETY: this is guaranteed to be safe by the caller + unsafe { self.unchecked_shl(rhs) } + } + /// Checked shift right. Computes `self >> rhs`, returning `None` if `rhs` is /// larger than or equal to the number of bits in `self`. /// @@ -1534,6 +1594,63 @@ macro_rules! int_impl { } } + /// Exact shift right. Computes `self >> rhs` as long as it can be reversed losslessly. + /// + /// Returns `None` if any non-zero bits would be shifted out or if `rhs` >= + #[doc = concat!("`", stringify!($SelfT), "::BITS`.")] + /// Otherwise, returns `Some(self >> rhs)`. + /// + /// # Examples + /// + /// ``` + /// #![feature(exact_bitshifts)] + /// + #[doc = concat!("assert_eq!(0x10", stringify!($SelfT), ".exact_shr(4), Some(0x1));")] + #[doc = concat!("assert_eq!(0x10", stringify!($SelfT), ".exact_shr(5), None);")] + /// ``` + #[unstable(feature = "exact_bitshifts", issue = "144336")] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const fn exact_shr(self, rhs: u32) -> Option<$SelfT> { + if rhs <= self.trailing_zeros() && rhs < <$SelfT>::BITS { + // SAFETY: rhs is checked above + Some(unsafe { self.unchecked_shr(rhs) }) + } else { + None + } + } + + /// Unchecked exact shift right. Computes `self >> rhs`, assuming the operation can be + /// losslessly reversed and `rhs` cannot be larger than + #[doc = concat!("`", stringify!($SelfT), "::BITS`.")] + /// + /// # Safety + /// + /// This results in undefined behavior when `rhs > self.trailing_zeros() || rhs >= + #[doc = concat!(stringify!($SelfT), "::BITS`")] + /// i.e. when + #[doc = concat!("[`", stringify!($SelfT), "::exact_shr`]")] + /// would return `None`. + #[unstable(feature = "exact_bitshifts", issue = "144336")] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const unsafe fn unchecked_exact_shr(self, rhs: u32) -> $SelfT { + assert_unsafe_precondition!( + check_language_ub, + concat!(stringify!($SelfT), "::unchecked_exact_shr cannot shift out non-zero bits"), + ( + zeros: u32 = self.trailing_zeros(), + bits: u32 = <$SelfT>::BITS, + rhs: u32 = rhs, + ) => rhs <= zeros && rhs < bits, + ); + + // SAFETY: this is guaranteed to be safe by the caller + unsafe { self.unchecked_shr(rhs) } + } + /// Checked absolute value. Computes `self.abs()`, returning `None` if /// `self == MIN`. /// diff --git a/library/core/src/num/uint_macros.rs b/library/core/src/num/uint_macros.rs index 0ce9c259c40e..bf72ec831970 100644 --- a/library/core/src/num/uint_macros.rs +++ b/library/core/src/num/uint_macros.rs @@ -1821,6 +1821,63 @@ macro_rules! uint_impl { } } + /// Exact shift left. Computes `self << rhs` as long as it can be reversed losslessly. + /// + /// Returns `None` if any non-zero bits would be shifted out or if `rhs` >= + #[doc = concat!("`", stringify!($SelfT), "::BITS`.")] + /// Otherwise, returns `Some(self << rhs)`. + /// + /// # Examples + /// + /// ``` + /// #![feature(exact_bitshifts)] + /// + #[doc = concat!("assert_eq!(0x1", stringify!($SelfT), ".exact_shl(4), Some(0x10));")] + #[doc = concat!("assert_eq!(0x1", stringify!($SelfT), ".exact_shl(129), None);")] + /// ``` + #[unstable(feature = "exact_bitshifts", issue = "144336")] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const fn exact_shl(self, rhs: u32) -> Option<$SelfT> { + if rhs <= self.leading_zeros() && rhs < <$SelfT>::BITS { + // SAFETY: rhs is checked above + Some(unsafe { self.unchecked_shl(rhs) }) + } else { + None + } + } + + /// Unchecked exact shift left. Computes `self << rhs`, assuming the operation can be + /// losslessly reversed `rhs` cannot be larger than + #[doc = concat!("`", stringify!($SelfT), "::BITS`.")] + /// + /// # Safety + /// + /// This results in undefined behavior when `rhs > self.leading_zeros() || rhs >= + #[doc = concat!(stringify!($SelfT), "::BITS`")] + /// i.e. when + #[doc = concat!("[`", stringify!($SelfT), "::exact_shl`]")] + /// would return `None`. + #[unstable(feature = "exact_bitshifts", issue = "144336")] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const unsafe fn unchecked_exact_shl(self, rhs: u32) -> $SelfT { + assert_unsafe_precondition!( + check_language_ub, + concat!(stringify!($SelfT), "::exact_shl_unchecked cannot shift out non-zero bits"), + ( + zeros: u32 = self.leading_zeros(), + bits: u32 = <$SelfT>::BITS, + rhs: u32 = rhs, + ) => rhs <= zeros && rhs < bits, + ); + + // SAFETY: this is guaranteed to be safe by the caller + unsafe { self.unchecked_shl(rhs) } + } + /// Checked shift right. Computes `self >> rhs`, returning `None` /// if `rhs` is larger than or equal to the number of bits in `self`. /// @@ -1936,6 +1993,63 @@ macro_rules! uint_impl { } } + /// Exact shift right. Computes `self >> rhs` as long as it can be reversed losslessly. + /// + /// Returns `None` if any non-zero bits would be shifted out or if `rhs` >= + #[doc = concat!("`", stringify!($SelfT), "::BITS`.")] + /// Otherwise, returns `Some(self >> rhs)`. + /// + /// # Examples + /// + /// ``` + /// #![feature(exact_bitshifts)] + /// + #[doc = concat!("assert_eq!(0x10", stringify!($SelfT), ".exact_shr(4), Some(0x1));")] + #[doc = concat!("assert_eq!(0x10", stringify!($SelfT), ".exact_shr(5), None);")] + /// ``` + #[unstable(feature = "exact_bitshifts", issue = "144336")] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const fn exact_shr(self, rhs: u32) -> Option<$SelfT> { + if rhs <= self.trailing_zeros() && rhs < <$SelfT>::BITS { + // SAFETY: rhs is checked above + Some(unsafe { self.unchecked_shr(rhs) }) + } else { + None + } + } + + /// Unchecked exact shift right. Computes `self >> rhs`, assuming the operation can be + /// losslessly reversed and `rhs` cannot be larger than + #[doc = concat!("`", stringify!($SelfT), "::BITS`.")] + /// + /// # Safety + /// + /// This results in undefined behavior when `rhs > self.trailing_zeros() || rhs >= + #[doc = concat!(stringify!($SelfT), "::BITS`")] + /// i.e. when + #[doc = concat!("[`", stringify!($SelfT), "::exact_shr`]")] + /// would return `None`. + #[unstable(feature = "exact_bitshifts", issue = "144336")] + #[must_use = "this returns the result of the operation, \ + without modifying the original"] + #[inline] + pub const unsafe fn unchecked_exact_shr(self, rhs: u32) -> $SelfT { + assert_unsafe_precondition!( + check_language_ub, + concat!(stringify!($SelfT), "::exact_shr_unchecked cannot shift out non-zero bits"), + ( + zeros: u32 = self.trailing_zeros(), + bits: u32 = <$SelfT>::BITS, + rhs: u32 = rhs, + ) => rhs <= zeros && rhs < bits, + ); + + // SAFETY: this is guaranteed to be safe by the caller + unsafe { self.unchecked_shr(rhs) } + } + /// Checked exponentiation. Computes `self.pow(exp)`, returning `None` if /// overflow occurred. /// diff --git a/library/core/src/ops/arith.rs b/library/core/src/ops/arith.rs index 16c719b0c394..6c6479c99845 100644 --- a/library/core/src/ops/arith.rs +++ b/library/core/src/ops/arith.rs @@ -74,8 +74,7 @@ append_const_msg )] #[doc(alias = "+")] -#[const_trait] -pub trait Add { +pub const trait Add { /// The resulting type after applying the `+` operator. #[stable(feature = "rust1", since = "1.0.0")] type Output; @@ -188,8 +187,7 @@ add_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f16 f32 f64 f128 append_const_msg )] #[doc(alias = "-")] -#[const_trait] -pub trait Sub { +pub const trait Sub { /// The resulting type after applying the `-` operator. #[stable(feature = "rust1", since = "1.0.0")] type Output; @@ -323,8 +321,7 @@ sub_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f16 f32 f64 f128 label = "no implementation for `{Self} * {Rhs}`" )] #[doc(alias = "*")] -#[const_trait] -pub trait Mul { +pub const trait Mul { /// The resulting type after applying the `*` operator. #[stable(feature = "rust1", since = "1.0.0")] type Output; @@ -462,8 +459,7 @@ mul_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f16 f32 f64 f128 label = "no implementation for `{Self} / {Rhs}`" )] #[doc(alias = "/")] -#[const_trait] -pub trait Div { +pub const trait Div { /// The resulting type after applying the `/` operator. #[stable(feature = "rust1", since = "1.0.0")] type Output; @@ -572,8 +568,7 @@ div_impl_float! { f16 f32 f64 f128 } label = "no implementation for `{Self} % {Rhs}`" )] #[doc(alias = "%")] -#[const_trait] -pub trait Rem { +pub const trait Rem { /// The resulting type after applying the `%` operator. #[stable(feature = "rust1", since = "1.0.0")] type Output; @@ -694,8 +689,7 @@ rem_impl_float! { f16 f32 f64 f128 } #[stable(feature = "rust1", since = "1.0.0")] #[rustc_const_unstable(feature = "const_ops", issue = "143802")] #[doc(alias = "-")] -#[const_trait] -pub trait Neg { +pub const trait Neg { /// The resulting type after applying the `-` operator. #[stable(feature = "rust1", since = "1.0.0")] type Output; @@ -772,8 +766,7 @@ neg_impl! { isize i8 i16 i32 i64 i128 f16 f32 f64 f128 } )] #[doc(alias = "+")] #[doc(alias = "+=")] -#[const_trait] -pub trait AddAssign { +pub const trait AddAssign { /// Performs the `+=` operation. /// /// # Example @@ -844,8 +837,7 @@ add_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f16 f32 f )] #[doc(alias = "-")] #[doc(alias = "-=")] -#[const_trait] -pub trait SubAssign { +pub const trait SubAssign { /// Performs the `-=` operation. /// /// # Example @@ -907,8 +899,7 @@ sub_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f16 f32 f )] #[doc(alias = "*")] #[doc(alias = "*=")] -#[const_trait] -pub trait MulAssign { +pub const trait MulAssign { /// Performs the `*=` operation. /// /// # Example @@ -970,8 +961,7 @@ mul_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f16 f32 f )] #[doc(alias = "/")] #[doc(alias = "/=")] -#[const_trait] -pub trait DivAssign { +pub const trait DivAssign { /// Performs the `/=` operation. /// /// # Example @@ -1036,8 +1026,7 @@ div_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f16 f32 f )] #[doc(alias = "%")] #[doc(alias = "%=")] -#[const_trait] -pub trait RemAssign { +pub const trait RemAssign { /// Performs the `%=` operation. /// /// # Example diff --git a/library/core/src/ops/bit.rs b/library/core/src/ops/bit.rs index 001967282190..0cd61b073738 100644 --- a/library/core/src/ops/bit.rs +++ b/library/core/src/ops/bit.rs @@ -32,8 +32,7 @@ #[stable(feature = "rust1", since = "1.0.0")] #[rustc_const_unstable(feature = "const_ops", issue = "143802")] #[doc(alias = "!")] -#[const_trait] -pub trait Not { +pub const trait Not { /// The resulting type after applying the `!` operator. #[stable(feature = "rust1", since = "1.0.0")] type Output; @@ -148,8 +147,7 @@ impl const Not for ! { message = "no implementation for `{Self} & {Rhs}`", label = "no implementation for `{Self} & {Rhs}`" )] -#[const_trait] -pub trait BitAnd { +pub const trait BitAnd { /// The resulting type after applying the `&` operator. #[stable(feature = "rust1", since = "1.0.0")] type Output; @@ -253,8 +251,7 @@ bitand_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 } message = "no implementation for `{Self} | {Rhs}`", label = "no implementation for `{Self} | {Rhs}`" )] -#[const_trait] -pub trait BitOr { +pub const trait BitOr { /// The resulting type after applying the `|` operator. #[stable(feature = "rust1", since = "1.0.0")] type Output; @@ -358,8 +355,7 @@ bitor_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 } message = "no implementation for `{Self} ^ {Rhs}`", label = "no implementation for `{Self} ^ {Rhs}`" )] -#[const_trait] -pub trait BitXor { +pub const trait BitXor { /// The resulting type after applying the `^` operator. #[stable(feature = "rust1", since = "1.0.0")] type Output; @@ -462,8 +458,7 @@ bitxor_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 } message = "no implementation for `{Self} << {Rhs}`", label = "no implementation for `{Self} << {Rhs}`" )] -#[const_trait] -pub trait Shl { +pub const trait Shl { /// The resulting type after applying the `<<` operator. #[stable(feature = "rust1", since = "1.0.0")] type Output; @@ -585,8 +580,7 @@ shl_impl_all! { u8 u16 u32 u64 u128 usize i8 i16 i32 i64 i128 isize } message = "no implementation for `{Self} >> {Rhs}`", label = "no implementation for `{Self} >> {Rhs}`" )] -#[const_trait] -pub trait Shr { +pub const trait Shr { /// The resulting type after applying the `>>` operator. #[stable(feature = "rust1", since = "1.0.0")] type Output; @@ -717,8 +711,7 @@ shr_impl_all! { u8 u16 u32 u64 u128 usize i8 i16 i32 i64 i128 isize } message = "no implementation for `{Self} &= {Rhs}`", label = "no implementation for `{Self} &= {Rhs}`" )] -#[const_trait] -pub trait BitAndAssign { +pub const trait BitAndAssign { /// Performs the `&=` operation. /// /// # Examples @@ -793,8 +786,7 @@ bitand_assign_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 } message = "no implementation for `{Self} |= {Rhs}`", label = "no implementation for `{Self} |= {Rhs}`" )] -#[const_trait] -pub trait BitOrAssign { +pub const trait BitOrAssign { /// Performs the `|=` operation. /// /// # Examples @@ -869,8 +861,7 @@ bitor_assign_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 } message = "no implementation for `{Self} ^= {Rhs}`", label = "no implementation for `{Self} ^= {Rhs}`" )] -#[const_trait] -pub trait BitXorAssign { +pub const trait BitXorAssign { /// Performs the `^=` operation. /// /// # Examples @@ -943,8 +934,7 @@ bitxor_assign_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 } message = "no implementation for `{Self} <<= {Rhs}`", label = "no implementation for `{Self} <<= {Rhs}`" )] -#[const_trait] -pub trait ShlAssign { +pub const trait ShlAssign { /// Performs the `<<=` operation. /// /// # Examples @@ -1030,8 +1020,7 @@ shl_assign_impl_all! { u8 u16 u32 u64 u128 usize i8 i16 i32 i64 i128 isize } message = "no implementation for `{Self} >>= {Rhs}`", label = "no implementation for `{Self} >>= {Rhs}`" )] -#[const_trait] -pub trait ShrAssign { +pub const trait ShrAssign { /// Performs the `>>=` operation. /// /// # Examples diff --git a/library/core/src/ops/deref.rs b/library/core/src/ops/deref.rs index 877b83d3a611..305861ea7b69 100644 --- a/library/core/src/ops/deref.rs +++ b/library/core/src/ops/deref.rs @@ -135,9 +135,8 @@ use crate::marker::PointeeSized; #[doc(alias = "&*")] #[stable(feature = "rust1", since = "1.0.0")] #[rustc_diagnostic_item = "Deref"] -#[const_trait] #[rustc_const_unstable(feature = "const_convert", issue = "143773")] -pub trait Deref: PointeeSized { +pub const trait Deref: PointeeSized { /// The resulting type after dereferencing. #[stable(feature = "rust1", since = "1.0.0")] #[rustc_diagnostic_item = "deref_target"] @@ -267,9 +266,8 @@ impl const Deref for &mut T { #[lang = "deref_mut"] #[doc(alias = "*")] #[stable(feature = "rust1", since = "1.0.0")] -#[const_trait] #[rustc_const_unstable(feature = "const_convert", issue = "143773")] -pub trait DerefMut: [const] Deref + PointeeSized { +pub const trait DerefMut: [const] Deref + PointeeSized { /// Mutably dereferences the value. #[stable(feature = "rust1", since = "1.0.0")] #[rustc_diagnostic_item = "deref_mut_method"] diff --git a/library/core/src/ops/drop.rs b/library/core/src/ops/drop.rs index bbef70232071..7125bf54701b 100644 --- a/library/core/src/ops/drop.rs +++ b/library/core/src/ops/drop.rs @@ -203,9 +203,8 @@ /// [nomicon]: ../../nomicon/phantom-data.html#an-exception-the-special-case-of-the-standard-library-and-its-unstable-may_dangle #[lang = "drop"] #[stable(feature = "rust1", since = "1.0.0")] -#[const_trait] #[rustc_const_unstable(feature = "const_destruct", issue = "133214")] -pub trait Drop { +pub const trait Drop { /// Executes the destructor for this type. /// /// This method is called implicitly when the value goes out of scope, diff --git a/library/core/src/ops/function.rs b/library/core/src/ops/function.rs index ad46e52a475d..479368ba8f80 100644 --- a/library/core/src/ops/function.rs +++ b/library/core/src/ops/function.rs @@ -72,9 +72,8 @@ use crate::marker::Tuple; )] #[fundamental] // so that regex can rely that `&str: !FnMut` #[must_use = "closures are lazy and do nothing unless called"] -#[const_trait] #[rustc_const_unstable(feature = "const_trait_impl", issue = "143874")] -pub trait Fn: FnMut { +pub const trait Fn: FnMut { /// Performs the call operation. #[unstable(feature = "fn_traits", issue = "29625")] extern "rust-call" fn call(&self, args: Args) -> Self::Output; @@ -160,9 +159,8 @@ pub trait Fn: FnMut { )] #[fundamental] // so that regex can rely that `&str: !FnMut` #[must_use = "closures are lazy and do nothing unless called"] -#[const_trait] #[rustc_const_unstable(feature = "const_trait_impl", issue = "143874")] -pub trait FnMut: FnOnce { +pub const trait FnMut: FnOnce { /// Performs the call operation. #[unstable(feature = "fn_traits", issue = "29625")] extern "rust-call" fn call_mut(&mut self, args: Args) -> Self::Output; @@ -240,9 +238,8 @@ pub trait FnMut: FnOnce { )] #[fundamental] // so that regex can rely that `&str: !FnMut` #[must_use = "closures are lazy and do nothing unless called"] -#[const_trait] #[rustc_const_unstable(feature = "const_trait_impl", issue = "143874")] -pub trait FnOnce { +pub const trait FnOnce { /// The returned type after the call operator is used. #[lang = "fn_once_output"] #[stable(feature = "fn_once_output", since = "1.12.0")] diff --git a/library/core/src/ops/index.rs b/library/core/src/ops/index.rs index 1aed2fb4742e..2c62a3930c28 100644 --- a/library/core/src/ops/index.rs +++ b/library/core/src/ops/index.rs @@ -55,9 +55,8 @@ #[doc(alias = "]")] #[doc(alias = "[")] #[doc(alias = "[]")] -#[const_trait] #[rustc_const_unstable(feature = "const_index", issue = "143775")] -pub trait Index { +pub const trait Index { /// The returned type after indexing. #[stable(feature = "rust1", since = "1.0.0")] #[rustc_diagnostic_item = "IndexOutput"] @@ -168,8 +167,7 @@ see chapter in The Book : [const] Index { +pub const trait IndexMut: [const] Index { /// Performs the mutable indexing (`container[index]`) operation. /// /// # Panics diff --git a/library/core/src/ops/try_trait.rs b/library/core/src/ops/try_trait.rs index 76bf438878f0..e1f2ebcf4c28 100644 --- a/library/core/src/ops/try_trait.rs +++ b/library/core/src/ops/try_trait.rs @@ -128,9 +128,8 @@ use crate::ops::ControlFlow; )] #[doc(alias = "?")] #[lang = "Try"] -#[const_trait] #[rustc_const_unstable(feature = "const_try", issue = "74935")] -pub trait Try: [const] FromResidual { +pub const trait Try: [const] FromResidual { /// The type of the value produced by `?` when *not* short-circuiting. #[unstable(feature = "try_trait_v2", issue = "84277", old_name = "try_trait")] type Output; @@ -306,9 +305,8 @@ pub trait Try: [const] FromResidual { )] #[rustc_diagnostic_item = "FromResidual"] #[unstable(feature = "try_trait_v2", issue = "84277", old_name = "try_trait")] -#[const_trait] #[rustc_const_unstable(feature = "const_try", issue = "74935")] -pub trait FromResidual::Residual> { +pub const trait FromResidual::Residual> { /// Constructs the type from a compatible `Residual` type. /// /// This should be implemented consistently with the `branch` method such @@ -361,9 +359,8 @@ where /// and in the other direction, /// ` as Residual>::TryType = Result`. #[unstable(feature = "try_trait_v2_residual", issue = "91285")] -#[const_trait] #[rustc_const_unstable(feature = "const_try", issue = "74935")] -pub trait Residual { +pub const trait Residual { /// The "return" type of this meta-function. #[unstable(feature = "try_trait_v2_residual", issue = "91285")] type TryType: Try; diff --git a/library/core/src/option.rs b/library/core/src/option.rs index 2a57536500ad..198636c67d0b 100644 --- a/library/core/src/option.rs +++ b/library/core/src/option.rs @@ -1640,7 +1640,7 @@ impl Option { pub const fn or_else(self, f: F) -> Option where F: [const] FnOnce() -> Option + [const] Destruct, - //FIXME(const_hack): this `T: ~const Destruct` is unnecessary, but even precise live drops can't tell + //FIXME(const_hack): this `T: [const] Destruct` is unnecessary, but even precise live drops can't tell // no value of type `T` gets dropped here T: [const] Destruct, { @@ -2185,7 +2185,7 @@ const fn expect_failed(msg: &str) -> ! { #[rustc_const_unstable(feature = "const_clone", issue = "142757")] impl const Clone for Option where - // FIXME(const_hack): the T: ~const Destruct should be inferred from the Self: ~const Destruct in clone_from. + // FIXME(const_hack): the T: [const] Destruct should be inferred from the Self: [const] Destruct in clone_from. // See https://github.com/rust-lang/rust/issues/144207 T: [const] Clone + [const] Destruct, { diff --git a/library/core/src/pat.rs b/library/core/src/pat.rs index 91d015b1bc53..a13eea3fb585 100644 --- a/library/core/src/pat.rs +++ b/library/core/src/pat.rs @@ -18,12 +18,11 @@ macro_rules! pattern_type { /// used right now to simplify ast lowering of pattern type ranges. #[unstable(feature = "pattern_type_range_trait", issue = "123646")] #[rustc_const_unstable(feature = "pattern_type_range_trait", issue = "123646")] -#[const_trait] #[diagnostic::on_unimplemented( message = "`{Self}` is not a valid base type for range patterns", label = "only integer types and `char` are supported" )] -pub trait RangePattern { +pub const trait RangePattern { /// Trait version of the inherent `MIN` assoc const. #[lang = "RangeMin"] const MIN: Self; diff --git a/library/core/src/slice/cmp.rs b/library/core/src/slice/cmp.rs index 68bd12aa7bf2..0d8013069840 100644 --- a/library/core/src/slice/cmp.rs +++ b/library/core/src/slice/cmp.rs @@ -95,9 +95,8 @@ impl PartialOrd for [T] { #[doc(hidden)] // intermediate trait for specialization of slice's PartialEq -#[const_trait] #[rustc_const_unstable(feature = "const_cmp", issue = "143800")] -trait SlicePartialEq { +const trait SlicePartialEq { fn equal(&self, other: &[B]) -> bool; fn not_equal(&self, other: &[B]) -> bool { diff --git a/library/core/src/slice/index.rs b/library/core/src/slice/index.rs index 98091e9fe83f..8e1bc0bae70a 100644 --- a/library/core/src/slice/index.rs +++ b/library/core/src/slice/index.rs @@ -151,7 +151,7 @@ mod private_slice_index { message = "the type `{T}` cannot be indexed by `{Self}`", label = "slice indices are of type `usize` or ranges of `usize`" )] -#[const_trait] +#[const_trait] // FIXME(const_trait_impl): Migrate to `const unsafe trait` once #146122 is fixed. #[rustc_const_unstable(feature = "const_index", issue = "143775")] pub unsafe trait SliceIndex: private_slice_index::Sealed { /// The output type returned by methods. diff --git a/library/core/src/str/traits.rs b/library/core/src/str/traits.rs index 971c8e829c64..4f228edf78e4 100644 --- a/library/core/src/str/traits.rs +++ b/library/core/src/str/traits.rs @@ -825,9 +825,8 @@ unsafe impl const SliceIndex for ops::RangeToInclusive { /// assert!(Point::from_str("(1 2)").is_err()); /// ``` #[stable(feature = "rust1", since = "1.0.0")] -#[const_trait] #[rustc_const_unstable(feature = "const_convert", issue = "143773")] -pub trait FromStr: Sized { +pub const trait FromStr: Sized { /// The associated error which can be returned from parsing. #[stable(feature = "rust1", since = "1.0.0")] type Err; diff --git a/library/core/src/unicode/unicode_data.rs b/library/core/src/unicode/unicode_data.rs index f78983bc3395..0bf2f948e85b 100644 --- a/library/core/src/unicode/unicode_data.rs +++ b/library/core/src/unicode/unicode_data.rs @@ -1,4 +1,4 @@ -///! This file is generated by `./x run src/tools/unicode-table-generator`; do not edit manually! +//! This file is generated by `./x run src/tools/unicode-table-generator`; do not edit manually! // Alphabetic : 1727 bytes, 142759 codepoints in 757 ranges (U+000041 - U+0323B0) using skiplist // Case_Ignorable : 1053 bytes, 2749 codepoints in 452 ranges (U+000027 - U+0E01F0) using skiplist // Cased : 407 bytes, 4578 codepoints in 159 ranges (U+000041 - U+01F18A) using skiplist diff --git a/library/coretests/benches/fmt.rs b/library/coretests/benches/fmt.rs index f45b921b9393..17549ab0f1c2 100644 --- a/library/coretests/benches/fmt.rs +++ b/library/coretests/benches/fmt.rs @@ -342,3 +342,27 @@ fn write_i128_hex(bh: &mut Bencher) { black_box(&mut buf).clear(); }); } + +#[bench] +fn write_i64_exp(bh: &mut Bencher) { + let mut buf = String::with_capacity(1024); + bh.iter(|| { + write!(black_box(&mut buf), "{:e}", black_box(0_i64)).unwrap(); + write!(black_box(&mut buf), "{:e}", black_box(100_i64)).unwrap(); + write!(black_box(&mut buf), "{:e}", black_box(-100_i64)).unwrap(); + write!(black_box(&mut buf), "{:e}", black_box(1_i64 << 32)).unwrap(); + black_box(&mut buf).clear(); + }); +} + +#[bench] +fn write_i128_exp(bh: &mut Bencher) { + let mut buf = String::with_capacity(1024); + bh.iter(|| { + write!(black_box(&mut buf), "{:e}", black_box(0_i128)).unwrap(); + write!(black_box(&mut buf), "{:e}", black_box(100_i128)).unwrap(); + write!(black_box(&mut buf), "{:e}", black_box(-100_i128)).unwrap(); + write!(black_box(&mut buf), "{:e}", black_box(1_i128 << 64)).unwrap(); + black_box(&mut buf).clear(); + }); +} diff --git a/library/coretests/tests/floats/f128.rs b/library/coretests/tests/floats/f128.rs index c173d7f0ae01..4267fef50f83 100644 --- a/library/coretests/tests/floats/f128.rs +++ b/library/coretests/tests/floats/f128.rs @@ -1,7 +1,9 @@ // FIXME(f16_f128): only tested on platforms that have symbols and aren't buggy #![cfg(target_has_reliable_f128)] -use super::{assert_approx_eq, assert_biteq}; +#[cfg(any(miri, target_has_reliable_f128_math))] +use super::assert_approx_eq; +use super::assert_biteq; // Note these tolerances make sense around zero, but not for more extreme exponents. @@ -74,25 +76,6 @@ fn test_float_bits_conv() { assert_eq!(f128::from_bits(masked_nan2).to_bits(), masked_nan2); } -#[test] -fn test_algebraic() { - let a: f128 = 123.0; - let b: f128 = 456.0; - - // Check that individual operations match their primitive counterparts. - // - // This is a check of current implementations and does NOT imply any form of - // guarantee about future behavior. The compiler reserves the right to make - // these operations inexact matches in the future. - let eps = if cfg!(miri) { 1e-6 } else { 0.0 }; - - assert_approx_eq!(a.algebraic_add(b), a + b, eps); - assert_approx_eq!(a.algebraic_sub(b), a - b, eps); - assert_approx_eq!(a.algebraic_mul(b), a * b, eps); - assert_approx_eq!(a.algebraic_div(b), a / b, eps); - assert_approx_eq!(a.algebraic_rem(b), a % b, eps); -} - #[test] fn test_from() { assert_biteq!(f128::from(false), 0.0); diff --git a/library/coretests/tests/floats/f16.rs b/library/coretests/tests/floats/f16.rs index c12de7221baa..d2818a6d7689 100644 --- a/library/coretests/tests/floats/f16.rs +++ b/library/coretests/tests/floats/f16.rs @@ -73,27 +73,6 @@ fn test_float_bits_conv() { assert_eq!(f16::from_bits(masked_nan2).to_bits(), masked_nan2); } -#[test] -fn test_algebraic() { - let a: f16 = 123.0; - let b: f16 = 456.0; - - // Check that individual operations match their primitive counterparts. - // - // This is a check of current implementations and does NOT imply any form of - // guarantee about future behavior. The compiler reserves the right to make - // these operations inexact matches in the future. - let eps_add = if cfg!(miri) { 1e1 } else { 0.0 }; - let eps_mul = if cfg!(miri) { 1e3 } else { 0.0 }; - let eps_div = if cfg!(miri) { 1e0 } else { 0.0 }; - - assert_approx_eq!(a.algebraic_add(b), a + b, eps_add); - assert_approx_eq!(a.algebraic_sub(b), a - b, eps_add); - assert_approx_eq!(a.algebraic_mul(b), a * b, eps_mul); - assert_approx_eq!(a.algebraic_div(b), a / b, eps_div); - assert_approx_eq!(a.algebraic_rem(b), a % b, eps_div); -} - #[test] fn test_from() { assert_biteq!(f16::from(false), 0.0); diff --git a/library/coretests/tests/floats/f32.rs b/library/coretests/tests/floats/f32.rs index b79295f470de..7b25f354da42 100644 --- a/library/coretests/tests/floats/f32.rs +++ b/library/coretests/tests/floats/f32.rs @@ -1,6 +1,6 @@ use core::f32; -use super::{assert_approx_eq, assert_biteq}; +use super::assert_biteq; /// First pattern over the mantissa const NAN_MASK1: u32 = 0x002a_aaaa; @@ -47,24 +47,3 @@ fn test_float_bits_conv() { assert_eq!(f32::from_bits(masked_nan1).to_bits(), masked_nan1); assert_eq!(f32::from_bits(masked_nan2).to_bits(), masked_nan2); } - -#[test] -fn test_algebraic() { - let a: f32 = 123.0; - let b: f32 = 456.0; - - // Check that individual operations match their primitive counterparts. - // - // This is a check of current implementations and does NOT imply any form of - // guarantee about future behavior. The compiler reserves the right to make - // these operations inexact matches in the future. - let eps_add = if cfg!(miri) { 1e-3 } else { 0.0 }; - let eps_mul = if cfg!(miri) { 1e-1 } else { 0.0 }; - let eps_div = if cfg!(miri) { 1e-4 } else { 0.0 }; - - assert_approx_eq!(a.algebraic_add(b), a + b, eps_add); - assert_approx_eq!(a.algebraic_sub(b), a - b, eps_add); - assert_approx_eq!(a.algebraic_mul(b), a * b, eps_mul); - assert_approx_eq!(a.algebraic_div(b), a / b, eps_div); - assert_approx_eq!(a.algebraic_rem(b), a % b, eps_div); -} diff --git a/library/coretests/tests/floats/f64.rs b/library/coretests/tests/floats/f64.rs index a25405863286..099d85627a34 100644 --- a/library/coretests/tests/floats/f64.rs +++ b/library/coretests/tests/floats/f64.rs @@ -1,6 +1,6 @@ use core::f64; -use super::{assert_approx_eq, assert_biteq}; +use super::assert_biteq; /// First pattern over the mantissa const NAN_MASK1: u64 = 0x000a_aaaa_aaaa_aaaa; @@ -46,22 +46,3 @@ fn test_float_bits_conv() { assert_eq!(f64::from_bits(masked_nan1).to_bits(), masked_nan1); assert_eq!(f64::from_bits(masked_nan2).to_bits(), masked_nan2); } - -#[test] -fn test_algebraic() { - let a: f64 = 123.0; - let b: f64 = 456.0; - - // Check that individual operations match their primitive counterparts. - // - // This is a check of current implementations and does NOT imply any form of - // guarantee about future behavior. The compiler reserves the right to make - // these operations inexact matches in the future. - let eps = if cfg!(miri) { 1e-6 } else { 0.0 }; - - assert_approx_eq!(a.algebraic_add(b), a + b, eps); - assert_approx_eq!(a.algebraic_sub(b), a - b, eps); - assert_approx_eq!(a.algebraic_mul(b), a * b, eps); - assert_approx_eq!(a.algebraic_div(b), a / b, eps); - assert_approx_eq!(a.algebraic_rem(b), a % b, eps); -} diff --git a/library/coretests/tests/floats/mod.rs b/library/coretests/tests/floats/mod.rs index 5f59cb9cce37..c0439845a4a4 100644 --- a/library/coretests/tests/floats/mod.rs +++ b/library/coretests/tests/floats/mod.rs @@ -27,6 +27,9 @@ trait TestableFloat: Sized { const NAN_MASK1: Self::Int; /// Second pattern over the mantissa const NAN_MASK2: Self::Int; + const EPS_ADD: Self; + const EPS_MUL: Self; + const EPS_DIV: Self; } impl TestableFloat for f16 { @@ -44,6 +47,9 @@ impl TestableFloat for f16 { const MAX_DOWN: Self = Self::from_bits(0x7bfe); const NAN_MASK1: Self::Int = 0x02aa; const NAN_MASK2: Self::Int = 0x0155; + const EPS_ADD: Self = if cfg!(miri) { 1e1 } else { 0.0 }; + const EPS_MUL: Self = if cfg!(miri) { 1e3 } else { 0.0 }; + const EPS_DIV: Self = if cfg!(miri) { 1e0 } else { 0.0 }; } impl TestableFloat for f32 { @@ -63,6 +69,9 @@ impl TestableFloat for f32 { const MAX_DOWN: Self = Self::from_bits(0x7f7f_fffe); const NAN_MASK1: Self::Int = 0x002a_aaaa; const NAN_MASK2: Self::Int = 0x0055_5555; + const EPS_ADD: Self = if cfg!(miri) { 1e-3 } else { 0.0 }; + const EPS_MUL: Self = if cfg!(miri) { 1e-1 } else { 0.0 }; + const EPS_DIV: Self = if cfg!(miri) { 1e-4 } else { 0.0 }; } impl TestableFloat for f64 { @@ -78,6 +87,9 @@ impl TestableFloat for f64 { const MAX_DOWN: Self = Self::from_bits(0x7fef_ffff_ffff_fffe); const NAN_MASK1: Self::Int = 0x000a_aaaa_aaaa_aaaa; const NAN_MASK2: Self::Int = 0x0005_5555_5555_5555; + const EPS_ADD: Self = if cfg!(miri) { 1e-6 } else { 0.0 }; + const EPS_MUL: Self = if cfg!(miri) { 1e-6 } else { 0.0 }; + const EPS_DIV: Self = if cfg!(miri) { 1e-6 } else { 0.0 }; } impl TestableFloat for f128 { @@ -93,6 +105,9 @@ impl TestableFloat for f128 { const MAX_DOWN: Self = Self::from_bits(0x7ffefffffffffffffffffffffffffffe); const NAN_MASK1: Self::Int = 0x0000aaaaaaaaaaaaaaaaaaaaaaaaaaaa; const NAN_MASK2: Self::Int = 0x00005555555555555555555555555555; + const EPS_ADD: Self = if cfg!(miri) { 1e-6 } else { 0.0 }; + const EPS_MUL: Self = if cfg!(miri) { 1e-6 } else { 0.0 }; + const EPS_DIV: Self = if cfg!(miri) { 1e-6 } else { 0.0 }; } /// Determine the tolerance for values of the argument type. @@ -1440,3 +1455,27 @@ float_test! { assert_biteq!(neg_inf.to_radians(), neg_inf); } } + +float_test! { + name: to_algebraic, + attrs: { + f16: #[cfg(target_has_reliable_f16)], + f128: #[cfg(target_has_reliable_f128)], + }, + test { + let a: Float = 123.0; + let b: Float = 456.0; + + // Check that individual operations match their primitive counterparts. + // + // This is a check of current implementations and does NOT imply any form of + // guarantee about future behavior. The compiler reserves the right to make + // these operations inexact matches in the future. + + assert_approx_eq!(a.algebraic_add(b), a + b, Float::EPS_ADD); + assert_approx_eq!(a.algebraic_sub(b), a - b, Float::EPS_ADD); + assert_approx_eq!(a.algebraic_mul(b), a * b, Float::EPS_MUL); + assert_approx_eq!(a.algebraic_div(b), a / b, Float::EPS_DIV); + assert_approx_eq!(a.algebraic_rem(b), a % b, Float::EPS_DIV); + } +} diff --git a/library/std/Cargo.toml b/library/std/Cargo.toml index 8b78fe53a397..d28a7f0b4602 100644 --- a/library/std/Cargo.toml +++ b/library/std/Cargo.toml @@ -81,7 +81,7 @@ wasi = { version = "0.11.0", features = [ ], default-features = false } [target.'cfg(all(target_os = "wasi", target_env = "p2"))'.dependencies] -wasip2 = { version = '0.14.3', features = [ +wasip2 = { version = '0.14.4', features = [ 'rustc-dep-of-std', ], default-features = false, package = 'wasi' } diff --git a/library/std/src/fs/tests.rs b/library/std/src/fs/tests.rs index f4431cedd180..f8dfb0d63340 100644 --- a/library/std/src/fs/tests.rs +++ b/library/std/src/fs/tests.rs @@ -226,6 +226,7 @@ fn file_test_io_seek_and_write() { target_os = "freebsd", target_os = "linux", target_os = "netbsd", + target_os = "solaris", target_vendor = "apple", ))] fn file_lock_multiple_shared() { @@ -249,6 +250,7 @@ fn file_lock_multiple_shared() { target_os = "freebsd", target_os = "linux", target_os = "netbsd", + target_os = "solaris", target_vendor = "apple", ))] fn file_lock_blocking() { @@ -273,6 +275,7 @@ fn file_lock_blocking() { target_os = "freebsd", target_os = "linux", target_os = "netbsd", + target_os = "solaris", target_vendor = "apple", ))] fn file_lock_drop() { @@ -294,6 +297,7 @@ fn file_lock_drop() { target_os = "freebsd", target_os = "linux", target_os = "netbsd", + target_os = "solaris", target_vendor = "apple", ))] fn file_lock_dup() { diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs index 99b380c47936..97db0d6ab751 100644 --- a/library/std/src/lib.rs +++ b/library/std/src/lib.rs @@ -354,6 +354,7 @@ #![feature(hasher_prefixfree_extras)] #![feature(hashmap_internals)] #![feature(hint_must_use)] +#![feature(int_from_ascii)] #![feature(ip)] #![feature(lazy_get)] #![feature(maybe_uninit_slice)] @@ -369,6 +370,7 @@ #![feature(slice_internals)] #![feature(slice_ptr_get)] #![feature(slice_range)] +#![feature(slice_split_once)] #![feature(std_internals)] #![feature(str_internals)] #![feature(sync_unsafe_cell)] diff --git a/library/std/src/num/f128.rs b/library/std/src/num/f128.rs index 64e604e35f75..b83692390b6b 100644 --- a/library/std/src/num/f128.rs +++ b/library/std/src/num/f128.rs @@ -467,10 +467,10 @@ impl f128 { /// # #[cfg(not(miri))] /// # #[cfg(target_has_reliable_f128_math)] { /// - /// let f = std::f128::consts::FRAC_PI_2; + /// let f = std::f128::consts::FRAC_PI_4; /// /// // asin(sin(pi/2)) - /// let abs_difference = (f.sin().asin() - std::f128::consts::FRAC_PI_2).abs(); + /// let abs_difference = (f.sin().asin() - f).abs(); /// /// assert!(abs_difference <= f128::EPSILON); /// # } @@ -912,10 +912,10 @@ impl f128 { /// # #[cfg(not(miri))] /// # #[cfg(target_has_reliable_f128_math)] { /// - /// let e = std::f128::consts::E; - /// let f = e.tanh().atanh(); + /// let x = std::f128::consts::FRAC_PI_6; + /// let f = x.tanh().atanh(); /// - /// let abs_difference = (f - e).abs(); + /// let abs_difference = (f - x).abs(); /// /// assert!(abs_difference <= 1e-5); /// # } diff --git a/library/std/src/num/f16.rs b/library/std/src/num/f16.rs index 7bdefb05858e..5599528717cb 100644 --- a/library/std/src/num/f16.rs +++ b/library/std/src/num/f16.rs @@ -432,10 +432,10 @@ impl f16 { /// # #[cfg(not(miri))] /// # #[cfg(target_has_reliable_f16_math)] { /// - /// let f = std::f16::consts::FRAC_PI_2; + /// let f = std::f16::consts::FRAC_PI_4; /// /// // asin(sin(pi/2)) - /// let abs_difference = (f.sin().asin() - std::f16::consts::FRAC_PI_2).abs(); + /// let abs_difference = (f.sin().asin() - f).abs(); /// /// assert!(abs_difference <= f16::EPSILON); /// # } @@ -877,10 +877,10 @@ impl f16 { /// # #[cfg(not(miri))] /// # #[cfg(target_has_reliable_f16_math)] { /// - /// let e = std::f16::consts::E; - /// let f = e.tanh().atanh(); + /// let x = std::f16::consts::FRAC_PI_6; + /// let f = x.tanh().atanh(); /// - /// let abs_difference = (f - e).abs(); + /// let abs_difference = (f - x).abs(); /// /// assert!(abs_difference <= 0.01); /// # } diff --git a/library/std/src/num/f32.rs b/library/std/src/num/f32.rs index 5dee68ad909e..0247080a8d6b 100644 --- a/library/std/src/num/f32.rs +++ b/library/std/src/num/f32.rs @@ -582,8 +582,8 @@ impl f32 { /// let abs_difference_x = (x.abs_sub(1.0) - 2.0).abs(); /// let abs_difference_y = (y.abs_sub(1.0) - 0.0).abs(); /// - /// assert!(abs_difference_x <= f32::EPSILON); - /// assert!(abs_difference_y <= f32::EPSILON); + /// assert!(abs_difference_x <= 1e-6); + /// assert!(abs_difference_y <= 1e-6); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] @@ -621,7 +621,7 @@ impl f32 { /// // x^(1/3) - 2 == 0 /// let abs_difference = (x.cbrt() - 2.0).abs(); /// - /// assert!(abs_difference <= f32::EPSILON); + /// assert!(abs_difference <= 1e-6); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] @@ -652,7 +652,7 @@ impl f32 { /// // sqrt(x^2 + y^2) /// let abs_difference = (x.hypot(y) - (x.powi(2) + y.powi(2)).sqrt()).abs(); /// - /// assert!(abs_difference <= 1e-6); + /// assert!(abs_difference <= 1e-5); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] @@ -725,7 +725,7 @@ impl f32 { /// let x = std::f32::consts::FRAC_PI_4; /// let abs_difference = (x.tan() - 1.0).abs(); /// - /// assert!(abs_difference <= f32::EPSILON); + /// assert!(abs_difference <= 1e-6); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] @@ -749,12 +749,12 @@ impl f32 { /// # Examples /// /// ``` - /// let f = std::f32::consts::FRAC_PI_2; + /// let f = std::f32::consts::FRAC_PI_4; /// /// // asin(sin(pi/2)) - /// let abs_difference = (f.sin().asin() - std::f32::consts::FRAC_PI_2).abs(); + /// let abs_difference = (f.sin().asin() - f).abs(); /// - /// assert!(abs_difference <= 1e-3); + /// assert!(abs_difference <= 1e-6); /// ``` #[doc(alias = "arcsin")] #[rustc_allow_incoherent_impl] @@ -813,7 +813,7 @@ impl f32 { /// // atan(tan(1)) /// let abs_difference = (f.tan().atan() - 1.0).abs(); /// - /// assert!(abs_difference <= f32::EPSILON); + /// assert!(abs_difference <= 1e-6); /// ``` #[doc(alias = "arctan")] #[rustc_allow_incoherent_impl] @@ -854,8 +854,8 @@ impl f32 { /// let abs_difference_1 = (y1.atan2(x1) - (-std::f32::consts::FRAC_PI_4)).abs(); /// let abs_difference_2 = (y2.atan2(x2) - (3.0 * std::f32::consts::FRAC_PI_4)).abs(); /// - /// assert!(abs_difference_1 <= f32::EPSILON); - /// assert!(abs_difference_2 <= f32::EPSILON); + /// assert!(abs_difference_1 <= 1e-5); + /// assert!(abs_difference_2 <= 1e-5); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] @@ -884,8 +884,8 @@ impl f32 { /// let abs_difference_0 = (f.0 - x.sin()).abs(); /// let abs_difference_1 = (f.1 - x.cos()).abs(); /// - /// assert!(abs_difference_0 <= 1e-6); - /// assert!(abs_difference_1 <= 1e-6); + /// assert!(abs_difference_0 <= 1e-4); + /// assert!(abs_difference_1 <= 1e-4); /// ``` #[doc(alias = "sincos")] #[rustc_allow_incoherent_impl] @@ -982,7 +982,7 @@ impl f32 { /// let g = ((e * e) - 1.0) / (2.0 * e); /// let abs_difference = (f - g).abs(); /// - /// assert!(abs_difference <= f32::EPSILON); + /// assert!(abs_difference <= 1e-6); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] @@ -1012,7 +1012,7 @@ impl f32 { /// let abs_difference = (f - g).abs(); /// /// // Same result - /// assert!(abs_difference <= f32::EPSILON); + /// assert!(abs_difference <= 1e-6); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] @@ -1042,7 +1042,7 @@ impl f32 { /// let g = (1.0 - e.powi(-2)) / (1.0 + e.powi(-2)); /// let abs_difference = (f - g).abs(); /// - /// assert!(abs_difference <= f32::EPSILON); + /// assert!(abs_difference <= 1e-6); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] @@ -1067,7 +1067,7 @@ impl f32 { /// /// let abs_difference = (f - x).abs(); /// - /// assert!(abs_difference <= 1e-7); + /// assert!(abs_difference <= 1e-6); /// ``` #[doc(alias = "arcsinh")] #[rustc_allow_incoherent_impl] @@ -1120,10 +1120,10 @@ impl f32 { /// # Examples /// /// ``` - /// let e = std::f32::consts::E; - /// let f = e.tanh().atanh(); + /// let x = std::f32::consts::FRAC_PI_6; + /// let f = x.tanh().atanh(); /// - /// let abs_difference = (f - e).abs(); + /// let abs_difference = (f - x).abs(); /// /// assert!(abs_difference <= 1e-5); /// ``` @@ -1153,7 +1153,7 @@ impl f32 { /// /// let abs_difference = (x.gamma() - 24.0).abs(); /// - /// assert!(abs_difference <= f32::EPSILON); + /// assert!(abs_difference <= 1e-5); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] @@ -1248,7 +1248,7 @@ impl f32 { /// let one = x.erf() + x.erfc(); /// let abs_difference = (one - 1.0).abs(); /// - /// assert!(abs_difference <= f32::EPSILON); + /// assert!(abs_difference <= 1e-6); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] diff --git a/library/std/src/num/f64.rs b/library/std/src/num/f64.rs index 3ec80f68bdb2..1cfd3909d967 100644 --- a/library/std/src/num/f64.rs +++ b/library/std/src/num/f64.rs @@ -749,12 +749,12 @@ impl f64 { /// # Examples /// /// ``` - /// let f = std::f64::consts::FRAC_PI_2; + /// let f = std::f64::consts::FRAC_PI_4; /// /// // asin(sin(pi/2)) - /// let abs_difference = (f.sin().asin() - std::f64::consts::FRAC_PI_2).abs(); + /// let abs_difference = (f.sin().asin() - f).abs(); /// - /// assert!(abs_difference < 1e-7); + /// assert!(abs_difference < 1e-14); /// ``` #[doc(alias = "arcsin")] #[rustc_allow_incoherent_impl] @@ -1120,10 +1120,10 @@ impl f64 { /// # Examples /// /// ``` - /// let e = std::f64::consts::E; - /// let f = e.tanh().atanh(); + /// let x = std::f64::consts::FRAC_PI_6; + /// let f = x.tanh().atanh(); /// - /// let abs_difference = (f - e).abs(); + /// let abs_difference = (f - x).abs(); /// /// assert!(abs_difference < 1.0e-10); /// ``` @@ -1153,7 +1153,7 @@ impl f64 { /// /// let abs_difference = (x.gamma() - 24.0).abs(); /// - /// assert!(abs_difference <= f64::EPSILON); + /// assert!(abs_difference <= 1e-10); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] @@ -1248,7 +1248,7 @@ impl f64 { /// let one = x.erf() + x.erfc(); /// let abs_difference = (one - 1.0).abs(); /// - /// assert!(abs_difference <= f64::EPSILON); + /// assert!(abs_difference <= 1e-10); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] diff --git a/library/std/src/os/cygwin/mod.rs b/library/std/src/os/cygwin/mod.rs index 7f6d6a645c85..a295a07caacf 100644 --- a/library/std/src/os/cygwin/mod.rs +++ b/library/std/src/os/cygwin/mod.rs @@ -1,4 +1,5 @@ //! Cygwin-specific definitions #![stable(feature = "raw_ext", since = "1.1.0")] pub mod fs; +pub mod net; pub(crate) mod raw; diff --git a/library/std/src/os/cygwin/net.rs b/library/std/src/os/cygwin/net.rs new file mode 100644 index 000000000000..0cccddb85d06 --- /dev/null +++ b/library/std/src/os/cygwin/net.rs @@ -0,0 +1,17 @@ +//! Cygwin-specific networking functionality. +//! +//! There are some limitations of Unix domain sockets on Cygwin: +//! * The syscalls `accept` and `connect` need +//! [handshake](https://inbox.sourceware.org/cygwin/Z_UERXFI1g-1v3p2@calimero.vinschen.de/T/#t). +//! * Cannot bind to abstract addr. +//! * Unbounded unix socket has an abstract local addr. +//! * Doesn't support recvmsg with control data. + +#![stable(feature = "unix_socket_abstract", since = "1.70.0")] + +#[stable(feature = "unix_socket_abstract", since = "1.70.0")] +pub use crate::os::net::linux_ext::addr::SocketAddrExt; +#[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] +pub use crate::os::net::linux_ext::socket::UnixSocketExt; +#[stable(feature = "tcp_quickack", since = "1.89.0")] +pub use crate::os::net::linux_ext::tcp::TcpStreamExt; diff --git a/library/std/src/os/mod.rs b/library/std/src/os/mod.rs index ab7734a79526..96d9bfae8ca3 100644 --- a/library/std/src/os/mod.rs +++ b/library/std/src/os/mod.rs @@ -185,5 +185,5 @@ pub mod xous; #[cfg(any(unix, target_os = "hermit", target_os = "trusty", target_os = "wasi", doc))] pub mod fd; -#[cfg(any(target_os = "linux", target_os = "android", doc))] +#[cfg(any(target_os = "linux", target_os = "android", target_os = "cygwin", doc))] mod net; diff --git a/library/std/src/os/net/linux_ext/mod.rs b/library/std/src/os/net/linux_ext/mod.rs index 3c9afe35479d..f3f3fdd258cd 100644 --- a/library/std/src/os/net/linux_ext/mod.rs +++ b/library/std/src/os/net/linux_ext/mod.rs @@ -1,6 +1,6 @@ -//! Linux and Android-specific networking functionality. +//! Linux, Android and Cygwin-specific networking functionality. -#![doc(cfg(any(target_os = "linux", target_os = "android")))] +#![doc(cfg(any(target_os = "linux", target_os = "android", target_os = "cygwin")))] #[stable(feature = "unix_socket_abstract", since = "1.70.0")] pub(crate) mod addr; diff --git a/library/std/src/os/net/mod.rs b/library/std/src/os/net/mod.rs index b7046dd7c598..47e69b3a260d 100644 --- a/library/std/src/os/net/mod.rs +++ b/library/std/src/os/net/mod.rs @@ -9,5 +9,5 @@ all(target_vendor = "fortanix", target_env = "sgx") ) )))] -#[cfg(any(target_os = "linux", target_os = "android", doc))] +#[cfg(any(target_os = "linux", target_os = "android", target_os = "cygwin", doc))] pub(super) mod linux_ext; diff --git a/library/std/src/os/unix/net/addr.rs b/library/std/src/os/unix/net/addr.rs index fd6fe72dd248..25b95014e08b 100644 --- a/library/std/src/os/unix/net/addr.rs +++ b/library/std/src/os/unix/net/addr.rs @@ -1,6 +1,6 @@ use crate::bstr::ByteStr; use crate::ffi::OsStr; -#[cfg(any(doc, target_os = "android", target_os = "linux"))] +#[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] use crate::os::net::linux_ext; use crate::os::unix::ffi::OsStrExt; use crate::path::Path; @@ -241,7 +241,7 @@ impl SocketAddr { // macOS seems to return a len of 16 and a zeroed sun_path for unnamed addresses if len == 0 - || (cfg!(not(any(target_os = "linux", target_os = "android"))) + || (cfg!(not(any(target_os = "linux", target_os = "android", target_os = "cygwin"))) && self.addr.sun_path[0] == 0) { AddressKind::Unnamed @@ -256,8 +256,8 @@ impl SocketAddr { #[stable(feature = "unix_socket_abstract", since = "1.70.0")] impl Sealed for SocketAddr {} -#[doc(cfg(any(target_os = "android", target_os = "linux")))] -#[cfg(any(doc, target_os = "android", target_os = "linux"))] +#[doc(cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin")))] +#[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] #[stable(feature = "unix_socket_abstract", since = "1.70.0")] impl linux_ext::addr::SocketAddrExt for SocketAddr { fn as_abstract_name(&self) -> Option<&[u8]> { diff --git a/library/std/src/os/unix/net/ancillary.rs b/library/std/src/os/unix/net/ancillary.rs index 36967fc3f98b..d0984bdfb99d 100644 --- a/library/std/src/os/unix/net/ancillary.rs +++ b/library/std/src/os/unix/net/ancillary.rs @@ -16,7 +16,8 @@ use crate::sys::net::Socket; not(target_os = "linux"), not(target_os = "android"), not(target_os = "netbsd"), - not(target_os = "freebsd") + not(target_os = "freebsd"), + not(target_os = "cygwin"), ))] #[allow(non_camel_case_types)] mod libc { @@ -195,14 +196,15 @@ impl<'a, T> Iterator for AncillaryDataIter<'a, T> { not(target_os = "android"), not(target_os = "linux"), not(target_os = "netbsd"), - not(target_os = "freebsd") + not(target_os = "freebsd"), + not(target_os = "cygwin"), ))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] #[derive(Clone)] pub struct SocketCred(()); /// Unix credential. -#[cfg(any(target_os = "android", target_os = "linux",))] +#[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] #[derive(Clone)] pub struct SocketCred(libc::ucred); @@ -217,8 +219,8 @@ pub struct SocketCred(libc::sockcred); #[derive(Clone)] pub struct SocketCred(libc::sockcred2); -#[doc(cfg(any(target_os = "android", target_os = "linux")))] -#[cfg(any(target_os = "android", target_os = "linux"))] +#[doc(cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin")))] +#[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] impl SocketCred { /// Creates a Unix credential struct. /// @@ -407,7 +409,8 @@ impl<'a> Iterator for ScmRights<'a> { not(target_os = "android"), not(target_os = "linux"), not(target_os = "netbsd"), - not(target_os = "freebsd") + not(target_os = "freebsd"), + not(target_os = "cygwin"), ))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] pub struct ScmCredentials<'a>(AncillaryDataIter<'a, ()>); @@ -415,7 +418,7 @@ pub struct ScmCredentials<'a>(AncillaryDataIter<'a, ()>); /// This control message contains unix credentials. /// /// The level is equal to `SOL_SOCKET` and the type is equal to `SCM_CREDENTIALS` or `SCM_CREDS`. -#[cfg(any(target_os = "android", target_os = "linux",))] +#[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] pub struct ScmCredentials<'a>(AncillaryDataIter<'a, libc::ucred>); @@ -432,7 +435,8 @@ pub struct ScmCredentials<'a>(AncillaryDataIter<'a, libc::sockcred>); target_os = "android", target_os = "linux", target_os = "netbsd", - target_os = "freebsd" + target_os = "freebsd", + target_os = "cygwin", ))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] impl<'a> Iterator for ScmCredentials<'a> { @@ -460,7 +464,8 @@ pub enum AncillaryData<'a> { target_os = "android", target_os = "linux", target_os = "netbsd", - target_os = "freebsd" + target_os = "freebsd", + target_os = "cygwin", ))] ScmCredentials(ScmCredentials<'a>), } @@ -489,7 +494,8 @@ impl<'a> AncillaryData<'a> { target_os = "android", target_os = "linux", target_os = "netbsd", - target_os = "freebsd" + target_os = "freebsd", + target_os = "cygwin", ))] unsafe fn as_credentials(data: &'a [u8]) -> Self { let ancillary_data_iter = AncillaryDataIter::new(data); @@ -507,7 +513,7 @@ impl<'a> AncillaryData<'a> { match (*cmsg).cmsg_level { libc::SOL_SOCKET => match (*cmsg).cmsg_type { libc::SCM_RIGHTS => Ok(AncillaryData::as_rights(data)), - #[cfg(any(target_os = "android", target_os = "linux",))] + #[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] libc::SCM_CREDENTIALS => Ok(AncillaryData::as_credentials(data)), #[cfg(target_os = "freebsd")] libc::SCM_CREDS2 => Ok(AncillaryData::as_credentials(data)), @@ -729,7 +735,8 @@ impl<'a> SocketAncillary<'a> { target_os = "android", target_os = "linux", target_os = "netbsd", - target_os = "freebsd" + target_os = "freebsd", + target_os = "cygwin", ))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] pub fn add_creds(&mut self, creds: &[SocketCred]) -> bool { diff --git a/library/std/src/os/unix/net/datagram.rs b/library/std/src/os/unix/net/datagram.rs index 7735637c8405..469bfbb0d837 100644 --- a/library/std/src/os/unix/net/datagram.rs +++ b/library/std/src/os/unix/net/datagram.rs @@ -14,9 +14,9 @@ use libc::MSG_NOSIGNAL; use super::{SocketAddr, sockaddr_un}; -#[cfg(any(doc, target_os = "android", target_os = "linux"))] +#[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] use super::{SocketAncillary, recv_vectored_with_ancillary_from, send_vectored_with_ancillary_to}; -#[cfg(any(doc, target_os = "android", target_os = "linux"))] +#[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] use crate::io::{IoSlice, IoSliceMut}; use crate::net::Shutdown; use crate::os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, OwnedFd, RawFd}; @@ -397,8 +397,14 @@ impl UnixDatagram { /// /// # Examples /// - #[cfg_attr(any(target_os = "android", target_os = "linux"), doc = "```no_run")] - #[cfg_attr(not(any(target_os = "android", target_os = "linux")), doc = "```ignore")] + #[cfg_attr( + any(target_os = "android", target_os = "linux", target_os = "cygwin"), + doc = "```no_run" + )] + #[cfg_attr( + not(any(target_os = "android", target_os = "linux", target_os = "cygwin")), + doc = "```ignore" + )] /// #![feature(unix_socket_ancillary_data)] /// use std::os::unix::net::{UnixDatagram, SocketAncillary, AncillaryData}; /// use std::io::IoSliceMut; @@ -428,7 +434,7 @@ impl UnixDatagram { /// Ok(()) /// } /// ``` - #[cfg(any(doc, target_os = "android", target_os = "linux"))] + #[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] pub fn recv_vectored_with_ancillary_from( &self, @@ -447,8 +453,14 @@ impl UnixDatagram { /// /// # Examples /// - #[cfg_attr(any(target_os = "android", target_os = "linux"), doc = "```no_run")] - #[cfg_attr(not(any(target_os = "android", target_os = "linux")), doc = "```ignore")] + #[cfg_attr( + any(target_os = "android", target_os = "linux", target_os = "cygwin"), + doc = "```no_run" + )] + #[cfg_attr( + not(any(target_os = "android", target_os = "linux", target_os = "cygwin")), + doc = "```ignore" + )] /// #![feature(unix_socket_ancillary_data)] /// use std::os::unix::net::{UnixDatagram, SocketAncillary, AncillaryData}; /// use std::io::IoSliceMut; @@ -478,7 +490,7 @@ impl UnixDatagram { /// Ok(()) /// } /// ``` - #[cfg(any(doc, target_os = "android", target_os = "linux"))] + #[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] pub fn recv_vectored_with_ancillary( &self, @@ -588,8 +600,14 @@ impl UnixDatagram { /// /// # Examples /// - #[cfg_attr(any(target_os = "android", target_os = "linux"), doc = "```no_run")] - #[cfg_attr(not(any(target_os = "android", target_os = "linux")), doc = "```ignore")] + #[cfg_attr( + any(target_os = "android", target_os = "linux", target_os = "cygwin"), + doc = "```no_run" + )] + #[cfg_attr( + not(any(target_os = "android", target_os = "linux", target_os = "cygwin")), + doc = "```ignore" + )] /// #![feature(unix_socket_ancillary_data)] /// use std::os::unix::net::{UnixDatagram, SocketAncillary}; /// use std::io::IoSlice; @@ -613,7 +631,7 @@ impl UnixDatagram { /// Ok(()) /// } /// ``` - #[cfg(any(doc, target_os = "android", target_os = "linux"))] + #[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] pub fn send_vectored_with_ancillary_to>( &self, @@ -630,8 +648,14 @@ impl UnixDatagram { /// /// # Examples /// - #[cfg_attr(any(target_os = "android", target_os = "linux"), doc = "```no_run")] - #[cfg_attr(not(any(target_os = "android", target_os = "linux")), doc = "```ignore")] + #[cfg_attr( + any(target_os = "android", target_os = "linux", target_os = "cygwin"), + doc = "```no_run" + )] + #[cfg_attr( + not(any(target_os = "android", target_os = "linux", target_os = "cygwin")), + doc = "```ignore" + )] /// #![feature(unix_socket_ancillary_data)] /// use std::os::unix::net::{UnixDatagram, SocketAncillary}; /// use std::io::IoSlice; @@ -655,7 +679,7 @@ impl UnixDatagram { /// Ok(()) /// } /// ``` - #[cfg(any(doc, target_os = "android", target_os = "linux"))] + #[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] pub fn send_vectored_with_ancillary( &self, diff --git a/library/std/src/os/unix/net/mod.rs b/library/std/src/os/unix/net/mod.rs index 6cd62303a532..94523d7d1e45 100644 --- a/library/std/src/os/unix/net/mod.rs +++ b/library/std/src/os/unix/net/mod.rs @@ -4,8 +4,8 @@ #![stable(feature = "unix_socket", since = "1.10.0")] mod addr; -#[doc(cfg(any(target_os = "android", target_os = "linux")))] -#[cfg(any(doc, target_os = "android", target_os = "linux"))] +#[doc(cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin")))] +#[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] mod ancillary; mod datagram; mod listener; @@ -27,7 +27,7 @@ mod ucred; #[stable(feature = "unix_socket", since = "1.10.0")] pub use self::addr::*; -#[cfg(any(doc, target_os = "android", target_os = "linux"))] +#[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] pub use self::ancillary::*; #[stable(feature = "unix_socket", since = "1.10.0")] diff --git a/library/std/src/os/unix/net/stream.rs b/library/std/src/os/unix/net/stream.rs index 768fa77a5f8c..ea4171a7d287 100644 --- a/library/std/src/os/unix/net/stream.rs +++ b/library/std/src/os/unix/net/stream.rs @@ -16,7 +16,7 @@ cfg_select! { } use super::{SocketAddr, sockaddr_un}; -#[cfg(any(doc, target_os = "android", target_os = "linux"))] +#[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] use super::{SocketAncillary, recv_vectored_with_ancillary_from, send_vectored_with_ancillary_to}; #[cfg(any( target_os = "android", @@ -508,8 +508,14 @@ impl UnixStream { /// /// # Examples /// - #[cfg_attr(any(target_os = "android", target_os = "linux"), doc = "```no_run")] - #[cfg_attr(not(any(target_os = "android", target_os = "linux")), doc = "```ignore")] + #[cfg_attr( + any(target_os = "android", target_os = "linux", target_os = "cygwin"), + doc = "```no_run" + )] + #[cfg_attr( + not(any(target_os = "android", target_os = "linux", target_os = "cygwin")), + doc = "```ignore" + )] /// #![feature(unix_socket_ancillary_data)] /// use std::os::unix::net::{UnixStream, SocketAncillary, AncillaryData}; /// use std::io::IoSliceMut; @@ -539,7 +545,7 @@ impl UnixStream { /// Ok(()) /// } /// ``` - #[cfg(any(doc, target_os = "android", target_os = "linux"))] + #[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] pub fn recv_vectored_with_ancillary( &self, @@ -557,8 +563,14 @@ impl UnixStream { /// /// # Examples /// - #[cfg_attr(any(target_os = "android", target_os = "linux"), doc = "```no_run")] - #[cfg_attr(not(any(target_os = "android", target_os = "linux")), doc = "```ignore")] + #[cfg_attr( + any(target_os = "android", target_os = "linux", target_os = "cygwin"), + doc = "```no_run" + )] + #[cfg_attr( + not(any(target_os = "android", target_os = "linux", target_os = "cygwin")), + doc = "```ignore" + )] /// #![feature(unix_socket_ancillary_data)] /// use std::os::unix::net::{UnixStream, SocketAncillary}; /// use std::io::IoSlice; @@ -582,7 +594,7 @@ impl UnixStream { /// Ok(()) /// } /// ``` - #[cfg(any(doc, target_os = "android", target_os = "linux"))] + #[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "cygwin"))] #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")] pub fn send_vectored_with_ancillary( &self, diff --git a/library/std/src/os/unix/net/tests.rs b/library/std/src/os/unix/net/tests.rs index 9a88687b1df0..4666b5e3c6c1 100644 --- a/library/std/src/os/unix/net/tests.rs +++ b/library/std/src/os/unix/net/tests.rs @@ -3,6 +3,8 @@ use crate::io::prelude::*; use crate::io::{self, ErrorKind, IoSlice, IoSliceMut}; #[cfg(target_os = "android")] use crate::os::android::net::{SocketAddrExt, UnixSocketExt}; +#[cfg(target_os = "cygwin")] +use crate::os::cygwin::net::{SocketAddrExt, UnixSocketExt}; #[cfg(target_os = "linux")] use crate::os::linux::net::{SocketAddrExt, UnixSocketExt}; #[cfg(any(target_os = "android", target_os = "linux"))] @@ -170,6 +172,7 @@ fn long_path() { #[test] #[cfg(not(target_os = "nto"))] #[cfg_attr(target_os = "android", ignore)] // Android SELinux rules prevent creating Unix sockets +#[cfg_attr(target_os = "cygwin", ignore)] // Cygwin connect needs handshake fn timeouts() { let dir = tmpdir(); let socket_path = dir.path().join("sock"); @@ -198,6 +201,7 @@ fn timeouts() { #[test] #[cfg_attr(target_os = "android", ignore)] // Android SELinux rules prevent creating Unix sockets +#[cfg_attr(target_os = "cygwin", ignore)] // Cygwin connect needs handshake fn test_read_timeout() { let dir = tmpdir(); let socket_path = dir.path().join("sock"); @@ -218,6 +222,7 @@ fn test_read_timeout() { #[test] #[cfg_attr(target_os = "android", ignore)] // Android SELinux rules prevent creating Unix sockets +#[cfg_attr(target_os = "cygwin", ignore)] // Cygwin connect needs handshake fn test_read_with_timeout() { let dir = tmpdir(); let socket_path = dir.path().join("sock"); @@ -246,6 +251,7 @@ fn test_read_with_timeout() { // when passed zero Durations #[test] #[cfg_attr(target_os = "android", ignore)] // Android SELinux rules prevent creating Unix sockets +#[cfg_attr(target_os = "cygwin", ignore)] // Cygwin connect needs handshake fn test_unix_stream_timeout_zero_duration() { let dir = tmpdir(); let socket_path = dir.path().join("sock"); @@ -283,6 +289,7 @@ fn test_unix_datagram() { #[test] #[cfg_attr(target_os = "android", ignore)] // Android SELinux rules prevent creating Unix sockets +#[cfg_attr(target_os = "cygwin", ignore)] // Cygwin autobinds an address fn test_unnamed_unix_datagram() { let dir = tmpdir(); let path1 = dir.path().join("sock1"); @@ -326,6 +333,7 @@ fn test_unix_datagram_connect_to_recv_addr() { #[test] #[cfg_attr(target_os = "android", ignore)] // Android SELinux rules prevent creating Unix sockets +#[cfg_attr(target_os = "cygwin", ignore)] // Cygwin autobinds an address fn test_connect_unix_datagram() { let dir = tmpdir(); let path1 = dir.path().join("sock1"); @@ -425,8 +433,9 @@ fn abstract_namespace_not_allowed_connect() { assert!(UnixStream::connect("\0asdf").is_err()); } -#[cfg(any(target_os = "android", target_os = "linux"))] +#[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] #[test] +#[cfg_attr(target_os = "cygwin", ignore)] // Cygwin cannot bind to abstract addr fn test_abstract_stream_connect() { let msg1 = b"hello"; let msg2 = b"world"; @@ -456,8 +465,9 @@ fn test_abstract_stream_connect() { thread.join().unwrap(); } -#[cfg(any(target_os = "android", target_os = "linux"))] +#[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] #[test] +#[cfg_attr(target_os = "cygwin", ignore)] // Cygwin cannot bind to abstract addr fn test_abstract_stream_iter() { let addr = or_panic!(SocketAddr::from_abstract_name(b"hidden")); let listener = or_panic!(UnixListener::bind_addr(&addr)); @@ -478,8 +488,9 @@ fn test_abstract_stream_iter() { thread.join().unwrap(); } -#[cfg(any(target_os = "android", target_os = "linux"))] +#[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] #[test] +#[cfg_attr(target_os = "cygwin", ignore)] // Cygwin cannot bind to abstract addr fn test_abstract_datagram_bind_send_to_addr() { let addr1 = or_panic!(SocketAddr::from_abstract_name(b"ns1")); let sock1 = or_panic!(UnixDatagram::bind_addr(&addr1)); @@ -499,8 +510,9 @@ fn test_abstract_datagram_bind_send_to_addr() { assert_eq!(addr.as_abstract_name().unwrap(), b"ns1"); } -#[cfg(any(target_os = "android", target_os = "linux"))] +#[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] #[test] +#[cfg_attr(target_os = "cygwin", ignore)] // Cygwin cannot bind to abstract addr fn test_abstract_datagram_connect_addr() { let addr1 = or_panic!(SocketAddr::from_abstract_name(b"ns3")); let bsock1 = or_panic!(UnixDatagram::bind_addr(&addr1)); @@ -524,7 +536,7 @@ fn test_abstract_datagram_connect_addr() { or_panic!(bsock2.recv_from(&mut buf)); } -#[cfg(any(target_os = "android", target_os = "linux"))] +#[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] #[test] fn test_abstract_name_too_long() { match SocketAddr::from_abstract_name( @@ -538,7 +550,7 @@ fn test_abstract_name_too_long() { } } -#[cfg(any(target_os = "android", target_os = "linux"))] +#[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] #[test] fn test_abstract_no_pathname_and_not_unnamed() { let name = b"local"; @@ -669,9 +681,10 @@ fn test_send_vectored_fds_unix_stream() { } } -#[cfg(any(target_os = "android", target_os = "linux"))] +#[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] #[test] #[cfg_attr(target_os = "android", ignore)] // Android SELinux rules prevent creating Unix sockets +#[cfg_attr(target_os = "cygwin", ignore)] // Cygwin recvmsg doesn't support Unix sockets fn test_send_vectored_with_ancillary_to_unix_datagram() { fn getpid() -> libc::pid_t { unsafe { libc::getpid() } diff --git a/library/std/src/sys/fs/unix.rs b/library/std/src/sys/fs/unix.rs index 3b525406223c..dfd6ce56a768 100644 --- a/library/std/src/sys/fs/unix.rs +++ b/library/std/src/sys/fs/unix.rs @@ -1293,6 +1293,15 @@ impl File { return Ok(()); } + #[cfg(target_os = "solaris")] + pub fn lock(&self) -> io::Result<()> { + let mut flock: libc::flock = unsafe { mem::zeroed() }; + flock.l_type = libc::F_WRLCK as libc::c_short; + flock.l_whence = libc::SEEK_SET as libc::c_short; + cvt(unsafe { libc::fcntl(self.as_raw_fd(), libc::F_SETLKW, &flock) })?; + Ok(()) + } + #[cfg(not(any( target_os = "freebsd", target_os = "fuchsia", @@ -1300,6 +1309,7 @@ impl File { target_os = "netbsd", target_os = "openbsd", target_os = "cygwin", + target_os = "solaris", target_vendor = "apple", )))] pub fn lock(&self) -> io::Result<()> { @@ -1320,6 +1330,15 @@ impl File { return Ok(()); } + #[cfg(target_os = "solaris")] + pub fn lock_shared(&self) -> io::Result<()> { + let mut flock: libc::flock = unsafe { mem::zeroed() }; + flock.l_type = libc::F_RDLCK as libc::c_short; + flock.l_whence = libc::SEEK_SET as libc::c_short; + cvt(unsafe { libc::fcntl(self.as_raw_fd(), libc::F_SETLKW, &flock) })?; + Ok(()) + } + #[cfg(not(any( target_os = "freebsd", target_os = "fuchsia", @@ -1327,6 +1346,7 @@ impl File { target_os = "netbsd", target_os = "openbsd", target_os = "cygwin", + target_os = "solaris", target_vendor = "apple", )))] pub fn lock_shared(&self) -> io::Result<()> { @@ -1355,6 +1375,23 @@ impl File { } } + #[cfg(target_os = "solaris")] + pub fn try_lock(&self) -> Result<(), TryLockError> { + let mut flock: libc::flock = unsafe { mem::zeroed() }; + flock.l_type = libc::F_WRLCK as libc::c_short; + flock.l_whence = libc::SEEK_SET as libc::c_short; + let result = cvt(unsafe { libc::fcntl(self.as_raw_fd(), libc::F_SETLK, &flock) }); + if let Err(err) = result { + if err.kind() == io::ErrorKind::WouldBlock { + Err(TryLockError::WouldBlock) + } else { + Err(TryLockError::Error(err)) + } + } else { + Ok(()) + } + } + #[cfg(not(any( target_os = "freebsd", target_os = "fuchsia", @@ -1362,6 +1399,7 @@ impl File { target_os = "netbsd", target_os = "openbsd", target_os = "cygwin", + target_os = "solaris", target_vendor = "apple", )))] pub fn try_lock(&self) -> Result<(), TryLockError> { @@ -1393,6 +1431,23 @@ impl File { } } + #[cfg(target_os = "solaris")] + pub fn try_lock_shared(&self) -> Result<(), TryLockError> { + let mut flock: libc::flock = unsafe { mem::zeroed() }; + flock.l_type = libc::F_RDLCK as libc::c_short; + flock.l_whence = libc::SEEK_SET as libc::c_short; + let result = cvt(unsafe { libc::fcntl(self.as_raw_fd(), libc::F_SETLK, &flock) }); + if let Err(err) = result { + if err.kind() == io::ErrorKind::WouldBlock { + Err(TryLockError::WouldBlock) + } else { + Err(TryLockError::Error(err)) + } + } else { + Ok(()) + } + } + #[cfg(not(any( target_os = "freebsd", target_os = "fuchsia", @@ -1400,6 +1455,7 @@ impl File { target_os = "netbsd", target_os = "openbsd", target_os = "cygwin", + target_os = "solaris", target_vendor = "apple", )))] pub fn try_lock_shared(&self) -> Result<(), TryLockError> { @@ -1423,6 +1479,15 @@ impl File { return Ok(()); } + #[cfg(target_os = "solaris")] + pub fn unlock(&self) -> io::Result<()> { + let mut flock: libc::flock = unsafe { mem::zeroed() }; + flock.l_type = libc::F_UNLCK as libc::c_short; + flock.l_whence = libc::SEEK_SET as libc::c_short; + cvt(unsafe { libc::fcntl(self.as_raw_fd(), libc::F_SETLKW, &flock) })?; + Ok(()) + } + #[cfg(not(any( target_os = "freebsd", target_os = "fuchsia", @@ -1430,6 +1495,7 @@ impl File { target_os = "netbsd", target_os = "openbsd", target_os = "cygwin", + target_os = "solaris", target_vendor = "apple", )))] pub fn unlock(&self) -> io::Result<()> { diff --git a/library/std/src/sys/mod.rs b/library/std/src/sys/mod.rs index 6324c1a232af..8c1150155806 100644 --- a/library/std/src/sys/mod.rs +++ b/library/std/src/sys/mod.rs @@ -26,6 +26,7 @@ pub mod io; pub mod net; pub mod os_str; pub mod path; +pub mod platform_version; pub mod process; pub mod random; pub mod stdio; diff --git a/library/std/src/sys/net/connection/socket/unix.rs b/library/std/src/sys/net/connection/socket/unix.rs index 8b5970d1494e..8216f8d2fd58 100644 --- a/library/std/src/sys/net/connection/socket/unix.rs +++ b/library/std/src/sys/net/connection/socket/unix.rs @@ -361,7 +361,7 @@ impl Socket { self.recv_from_with_flags(buf, 0) } - #[cfg(any(target_os = "android", target_os = "linux"))] + #[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] pub fn recv_msg(&self, msg: &mut libc::msghdr) -> io::Result { let n = cvt(unsafe { libc::recvmsg(self.as_raw_fd(), msg, libc::MSG_CMSG_CLOEXEC) })?; Ok(n as usize) @@ -384,7 +384,7 @@ impl Socket { self.0.is_write_vectored() } - #[cfg(any(target_os = "android", target_os = "linux"))] + #[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] pub fn send_msg(&self, msg: &mut libc::msghdr) -> io::Result { let n = cvt(unsafe { libc::sendmsg(self.as_raw_fd(), msg, 0) })?; Ok(n as usize) @@ -472,12 +472,12 @@ impl Socket { Ok(raw != 0) } - #[cfg(any(target_os = "android", target_os = "linux",))] + #[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] pub fn set_quickack(&self, quickack: bool) -> io::Result<()> { setsockopt(self, libc::IPPROTO_TCP, libc::TCP_QUICKACK, quickack as c_int) } - #[cfg(any(target_os = "android", target_os = "linux",))] + #[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] pub fn quickack(&self) -> io::Result { let raw: c_int = getsockopt(self, libc::IPPROTO_TCP, libc::TCP_QUICKACK)?; Ok(raw != 0) @@ -541,12 +541,12 @@ impl Socket { Ok(raw != 0) } - #[cfg(any(target_os = "android", target_os = "linux",))] + #[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] pub fn set_passcred(&self, passcred: bool) -> io::Result<()> { setsockopt(self, libc::SOL_SOCKET, libc::SO_PASSCRED, passcred as libc::c_int) } - #[cfg(any(target_os = "android", target_os = "linux",))] + #[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))] pub fn passcred(&self) -> io::Result { let passcred: libc::c_int = getsockopt(self, libc::SOL_SOCKET, libc::SO_PASSCRED)?; Ok(passcred != 0) diff --git a/library/std/src/sys/platform_version/darwin/core_foundation.rs b/library/std/src/sys/platform_version/darwin/core_foundation.rs new file mode 100644 index 000000000000..1e0d15fcf661 --- /dev/null +++ b/library/std/src/sys/platform_version/darwin/core_foundation.rs @@ -0,0 +1,180 @@ +//! Minimal utilities for interfacing with a dynamically loaded CoreFoundation. +#![allow(non_snake_case, non_upper_case_globals)] +use super::root_relative; +use crate::ffi::{CStr, c_char, c_void}; +use crate::ptr::null_mut; +use crate::sys::common::small_c_string::run_path_with_cstr; + +// MacTypes.h +pub(super) type Boolean = u8; +// CoreFoundation/CFBase.h +pub(super) type CFTypeID = usize; +pub(super) type CFOptionFlags = usize; +pub(super) type CFIndex = isize; +pub(super) type CFTypeRef = *mut c_void; +pub(super) type CFAllocatorRef = CFTypeRef; +pub(super) const kCFAllocatorDefault: CFAllocatorRef = null_mut(); +// CoreFoundation/CFError.h +pub(super) type CFErrorRef = CFTypeRef; +// CoreFoundation/CFData.h +pub(super) type CFDataRef = CFTypeRef; +// CoreFoundation/CFPropertyList.h +pub(super) const kCFPropertyListImmutable: CFOptionFlags = 0; +pub(super) type CFPropertyListFormat = CFIndex; +pub(super) type CFPropertyListRef = CFTypeRef; +// CoreFoundation/CFString.h +pub(super) type CFStringRef = CFTypeRef; +pub(super) type CFStringEncoding = u32; +pub(super) const kCFStringEncodingUTF8: CFStringEncoding = 0x08000100; +// CoreFoundation/CFDictionary.h +pub(super) type CFDictionaryRef = CFTypeRef; + +/// An open handle to the dynamically loaded CoreFoundation framework. +/// +/// This is `dlopen`ed, and later `dlclose`d. This is done to try to avoid +/// "leaking" the CoreFoundation symbols to the rest of the user's binary if +/// they decided to not link CoreFoundation themselves. +/// +/// It is also faster to look up symbols directly via this handle than with +/// `RTLD_DEFAULT`. +pub(super) struct CFHandle(*mut c_void); + +macro_rules! dlsym_fn { + ( + unsafe fn $name:ident($($param:ident: $param_ty:ty),* $(,)?) $(-> $ret:ty)?; + ) => { + pub(super) unsafe fn $name(&self, $($param: $param_ty),*) $(-> $ret)? { + let ptr = unsafe { + libc::dlsym( + self.0, + concat!(stringify!($name), '\0').as_bytes().as_ptr().cast(), + ) + }; + if ptr.is_null() { + let err = unsafe { CStr::from_ptr(libc::dlerror()) }; + panic!("could not find function {}: {err:?}", stringify!($name)); + } + + // SAFETY: Just checked that the symbol isn't NULL, and macro invoker verifies that + // the signature is correct. + let fnptr = unsafe { + crate::mem::transmute::< + *mut c_void, + unsafe extern "C" fn($($param_ty),*) $(-> $ret)?, + >(ptr) + }; + + // SAFETY: Upheld by caller. + unsafe { fnptr($($param),*) } + } + }; +} + +impl CFHandle { + /// Link to the CoreFoundation dylib, and look up symbols from that. + pub(super) fn new() -> Self { + // We explicitly use non-versioned path here, to allow this to work on older iOS devices. + let cf_path = + root_relative("/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation"); + + let handle = run_path_with_cstr(&cf_path, &|path| unsafe { + Ok(libc::dlopen(path.as_ptr(), libc::RTLD_LAZY | libc::RTLD_LOCAL)) + }) + .expect("failed allocating string"); + + if handle.is_null() { + let err = unsafe { CStr::from_ptr(libc::dlerror()) }; + panic!("could not open CoreFoundation.framework: {err:?}"); + } + + Self(handle) + } + + pub(super) fn kCFAllocatorNull(&self) -> CFAllocatorRef { + // Available: in all CF versions. + let static_ptr = unsafe { libc::dlsym(self.0, c"kCFAllocatorNull".as_ptr()) }; + if static_ptr.is_null() { + let err = unsafe { CStr::from_ptr(libc::dlerror()) }; + panic!("could not find kCFAllocatorNull: {err:?}"); + } + unsafe { *static_ptr.cast() } + } + + // CoreFoundation/CFBase.h + dlsym_fn!( + // Available: in all CF versions. + unsafe fn CFRelease(cf: CFTypeRef); + ); + dlsym_fn!( + // Available: in all CF versions. + unsafe fn CFGetTypeID(cf: CFTypeRef) -> CFTypeID; + ); + + // CoreFoundation/CFData.h + dlsym_fn!( + // Available: in all CF versions. + unsafe fn CFDataCreateWithBytesNoCopy( + allocator: CFAllocatorRef, + bytes: *const u8, + length: CFIndex, + bytes_deallocator: CFAllocatorRef, + ) -> CFDataRef; + ); + + // CoreFoundation/CFPropertyList.h + dlsym_fn!( + // Available: since macOS 10.6. + unsafe fn CFPropertyListCreateWithData( + allocator: CFAllocatorRef, + data: CFDataRef, + options: CFOptionFlags, + format: *mut CFPropertyListFormat, + error: *mut CFErrorRef, + ) -> CFPropertyListRef; + ); + + // CoreFoundation/CFString.h + dlsym_fn!( + // Available: in all CF versions. + unsafe fn CFStringGetTypeID() -> CFTypeID; + ); + dlsym_fn!( + // Available: in all CF versions. + unsafe fn CFStringCreateWithCStringNoCopy( + alloc: CFAllocatorRef, + c_str: *const c_char, + encoding: CFStringEncoding, + contents_deallocator: CFAllocatorRef, + ) -> CFStringRef; + ); + dlsym_fn!( + // Available: in all CF versions. + unsafe fn CFStringGetCString( + the_string: CFStringRef, + buffer: *mut c_char, + buffer_size: CFIndex, + encoding: CFStringEncoding, + ) -> Boolean; + ); + + // CoreFoundation/CFDictionary.h + dlsym_fn!( + // Available: in all CF versions. + unsafe fn CFDictionaryGetTypeID() -> CFTypeID; + ); + dlsym_fn!( + // Available: in all CF versions. + unsafe fn CFDictionaryGetValue( + the_dict: CFDictionaryRef, + key: *const c_void, + ) -> *const c_void; + ); +} + +impl Drop for CFHandle { + fn drop(&mut self) { + // Ignore errors when closing. This is also what `libloading` does: + // https://docs.rs/libloading/0.8.6/src/libloading/os/unix/mod.rs.html#374 + let _ = unsafe { libc::dlclose(self.0) }; + } +} diff --git a/library/std/src/sys/platform_version/darwin/mod.rs b/library/std/src/sys/platform_version/darwin/mod.rs new file mode 100644 index 000000000000..06b97fcdef4f --- /dev/null +++ b/library/std/src/sys/platform_version/darwin/mod.rs @@ -0,0 +1,351 @@ +use self::core_foundation::{ + CFDictionaryRef, CFHandle, CFIndex, CFStringRef, CFTypeRef, kCFAllocatorDefault, + kCFPropertyListImmutable, kCFStringEncodingUTF8, +}; +use crate::borrow::Cow; +use crate::bstr::ByteStr; +use crate::ffi::{CStr, c_char}; +use crate::num::{NonZero, ParseIntError}; +use crate::path::{Path, PathBuf}; +use crate::ptr::null_mut; +use crate::sync::atomic::{AtomicU32, Ordering}; +use crate::{env, fs}; + +mod core_foundation; +mod public_extern; +#[cfg(test)] +mod tests; + +/// The version of the operating system. +/// +/// We use a packed u32 here to allow for fast comparisons and to match Mach-O's `LC_BUILD_VERSION`. +type OSVersion = u32; + +/// Combine parts of a version into an [`OSVersion`]. +/// +/// The size of the parts are inherently limited by Mach-O's `LC_BUILD_VERSION`. +#[inline] +const fn pack_os_version(major: u16, minor: u8, patch: u8) -> OSVersion { + let (major, minor, patch) = (major as u32, minor as u32, patch as u32); + (major << 16) | (minor << 8) | patch +} + +/// [`pack_os_version`], but takes `i32` and saturates. +/// +/// Instead of using e.g. `major as u16`, which truncates. +#[inline] +fn pack_i32_os_version(major: i32, minor: i32, patch: i32) -> OSVersion { + let major: u16 = major.try_into().unwrap_or(u16::MAX); + let minor: u8 = minor.try_into().unwrap_or(u8::MAX); + let patch: u8 = patch.try_into().unwrap_or(u8::MAX); + pack_os_version(major, minor, patch) +} + +/// Get the current OS version, packed according to [`pack_os_version`]. +/// +/// # Semantics +/// +/// The reported version on macOS might be 10.16 if the SDK version of the binary is less than 11.0. +/// This is a workaround that Apple implemented to handle applications that assumed that macOS +/// versions would always start with "10", see: +/// +/// +/// It _is_ possible to get the real version regardless of the SDK version of the binary, this is +/// what Zig does: +/// +/// +/// We choose to not do that, and instead follow Apple's behaviour here, and return 10.16 when +/// compiled with an older SDK; the user should instead upgrade their tooling. +/// +/// NOTE: `rustc` currently doesn't set the right SDK version when linking with ld64, so this will +/// have the wrong behaviour with `-Clinker=ld` on x86_64. But that's a `rustc` bug: +/// +#[inline] +fn current_version() -> OSVersion { + // Cache the lookup for performance. + // + // 0.0.0 is never going to be a valid version ("vtool" reports "n/a" on 0 versions), so we use + // that as our sentinel value. + static CURRENT_VERSION: AtomicU32 = AtomicU32::new(0); + + // We use relaxed atomics instead of e.g. a `Once`, it doesn't matter if multiple threads end up + // racing to read or write the version, `lookup_version` should be idempotent and always return + // the same value. + // + // `compiler-rt` uses `dispatch_once`, but that's overkill for the reasons above. + let version = CURRENT_VERSION.load(Ordering::Relaxed); + if version == 0 { + let version = lookup_version().get(); + CURRENT_VERSION.store(version, Ordering::Relaxed); + version + } else { + version + } +} + +/// Look up the os version. +/// +/// # Aborts +/// +/// Aborts if reading or parsing the version fails (or if the system was out of memory). +/// +/// We deliberately choose to abort, as having this silently return an invalid OS version would be +/// impossible for a user to debug. +// The lookup is costly and should be on the cold path because of the cache in `current_version`. +#[cold] +// Micro-optimization: We use `extern "C"` to abort on panic, allowing `current_version` (inlined) +// to be free of unwind handling. Aborting is required for `__isPlatformVersionAtLeast` anyhow. +extern "C" fn lookup_version() -> NonZero { + // Try to read from `sysctl` first (faster), but if that fails, fall back to reading the + // property list (this is roughly what `_availability_version_check` does internally). + let version = version_from_sysctl().unwrap_or_else(version_from_plist); + + // Use `NonZero` to try to make it clearer to the optimizer that this will never return 0. + NonZero::new(version).expect("version cannot be 0.0.0") +} + +/// Read the version from `kern.osproductversion` or `kern.iossupportversion`. +/// +/// This is faster than `version_from_plist`, since it doesn't need to invoke `dlsym`. +fn version_from_sysctl() -> Option { + // This won't work in the simulator, as `kern.osproductversion` returns the host macOS version, + // and `kern.iossupportversion` returns the host macOS' iOSSupportVersion (while you can run + // simulators with many different iOS versions). + if cfg!(target_abi = "sim") { + // Fall back to `version_from_plist` on these targets. + return None; + } + + let sysctl_version = |name: &CStr| { + let mut buf: [u8; 32] = [0; 32]; + let mut size = buf.len(); + let ptr = buf.as_mut_ptr().cast(); + let ret = unsafe { libc::sysctlbyname(name.as_ptr(), ptr, &mut size, null_mut(), 0) }; + if ret != 0 { + // This sysctl is not available. + return None; + } + let buf = &buf[..(size - 1)]; + + if buf.is_empty() { + // The buffer may be empty when using `kern.iossupportversion` on an actual iOS device, + // or on visionOS when running under "Designed for iPad". + // + // In that case, fall back to `kern.osproductversion`. + return None; + } + + Some(parse_os_version(buf).unwrap_or_else(|err| { + panic!("failed parsing version from sysctl ({}): {err}", ByteStr::new(buf)) + })) + }; + + // When `target_os = "ios"`, we may be in many different states: + // - Native iOS device. + // - iOS Simulator. + // - Mac Catalyst. + // - Mac + "Designed for iPad". + // - Native visionOS device + "Designed for iPad". + // - visionOS simulator + "Designed for iPad". + // + // Of these, only native, Mac Catalyst and simulators can be differentiated at compile-time + // (with `target_abi = ""`, `target_abi = "macabi"` and `target_abi = "sim"` respectively). + // + // That is, "Designed for iPad" will act as iOS at compile-time, but the `ProductVersion` will + // still be the host macOS or visionOS version. + // + // Furthermore, we can't even reliably differentiate between these at runtime, since + // `dyld_get_active_platform` isn't publicly available. + // + // Fortunately, we won't need to know any of that; we can simply attempt to get the + // `iOSSupportVersion` (which may be set on native iOS too, but then it will be set to the host + // iOS version), and if that fails, fall back to the `ProductVersion`. + if cfg!(target_os = "ios") { + // https://github.com/apple-oss-distributions/xnu/blob/xnu-11215.81.4/bsd/kern/kern_sysctl.c#L2077-L2100 + if let Some(ios_support_version) = sysctl_version(c"kern.iossupportversion") { + return Some(ios_support_version); + } + + // On Mac Catalyst, if we failed looking up `iOSSupportVersion`, we don't want to + // accidentally fall back to `ProductVersion`. + if cfg!(target_abi = "macabi") { + return None; + } + } + + // Introduced in macOS 10.13.4. + // https://github.com/apple-oss-distributions/xnu/blob/xnu-11215.81.4/bsd/kern/kern_sysctl.c#L2015-L2051 + sysctl_version(c"kern.osproductversion") +} + +/// Look up the current OS version(s) from `/System/Library/CoreServices/SystemVersion.plist`. +/// +/// More specifically, from the `ProductVersion` and `iOSSupportVersion` keys, and from +/// `$IPHONE_SIMULATOR_ROOT/System/Library/CoreServices/SystemVersion.plist` on the simulator. +/// +/// This file was introduced in macOS 10.3, which is well below the minimum supported version by +/// `rustc`, which is (at the time of writing) macOS 10.12. +/// +/// # Implementation +/// +/// We do roughly the same thing in here as `compiler-rt`, and dynamically look up CoreFoundation +/// utilities for parsing PLists (to avoid having to re-implement that in here, as pulling in a full +/// PList parser into `std` seems costly). +/// +/// If this is found to be undesirable, we _could_ possibly hack it by parsing the PList manually +/// (it seems to use the plain-text "xml1" encoding/format in all versions), but that seems brittle. +fn version_from_plist() -> OSVersion { + // Read `SystemVersion.plist`. Always present on Apple platforms, reading it cannot fail. + let path = root_relative("/System/Library/CoreServices/SystemVersion.plist"); + let plist_buffer = fs::read(&path).unwrap_or_else(|e| panic!("failed reading {path:?}: {e}")); + let cf_handle = CFHandle::new(); + parse_version_from_plist(&cf_handle, &plist_buffer) +} + +/// Parse OS version from the given PList. +/// +/// Split out from [`version_from_plist`] to allow for testing. +fn parse_version_from_plist(cf_handle: &CFHandle, plist_buffer: &[u8]) -> OSVersion { + let plist_data = unsafe { + cf_handle.CFDataCreateWithBytesNoCopy( + kCFAllocatorDefault, + plist_buffer.as_ptr(), + plist_buffer.len() as CFIndex, + cf_handle.kCFAllocatorNull(), + ) + }; + assert!(!plist_data.is_null(), "failed creating CFData"); + let _plist_data_release = Deferred(|| unsafe { cf_handle.CFRelease(plist_data) }); + + let plist = unsafe { + cf_handle.CFPropertyListCreateWithData( + kCFAllocatorDefault, + plist_data, + kCFPropertyListImmutable, + null_mut(), // Don't care about the format of the PList. + null_mut(), // Don't care about the error data. + ) + }; + assert!(!plist.is_null(), "failed reading PList in SystemVersion.plist"); + let _plist_release = Deferred(|| unsafe { cf_handle.CFRelease(plist) }); + + assert_eq!( + unsafe { cf_handle.CFGetTypeID(plist) }, + unsafe { cf_handle.CFDictionaryGetTypeID() }, + "SystemVersion.plist did not contain a dictionary at the top level" + ); + let plist: CFDictionaryRef = plist.cast(); + + // Same logic as in `version_from_sysctl`. + if cfg!(target_os = "ios") { + if let Some(ios_support_version) = + unsafe { string_version_key(cf_handle, plist, c"iOSSupportVersion") } + { + return ios_support_version; + } + + // Force Mac Catalyst to use iOSSupportVersion (do not fall back to ProductVersion). + if cfg!(target_abi = "macabi") { + panic!("expected iOSSupportVersion in SystemVersion.plist"); + } + } + + // On all other platforms, we can find the OS version by simply looking at `ProductVersion`. + unsafe { string_version_key(cf_handle, plist, c"ProductVersion") } + .expect("expected ProductVersion in SystemVersion.plist") +} + +/// Look up a string key in a CFDictionary, and convert it to an [`OSVersion`]. +unsafe fn string_version_key( + cf_handle: &CFHandle, + plist: CFDictionaryRef, + lookup_key: &CStr, +) -> Option { + let cf_lookup_key = unsafe { + cf_handle.CFStringCreateWithCStringNoCopy( + kCFAllocatorDefault, + lookup_key.as_ptr(), + kCFStringEncodingUTF8, + cf_handle.kCFAllocatorNull(), + ) + }; + assert!(!cf_lookup_key.is_null(), "failed creating CFString"); + let _lookup_key_release = Deferred(|| unsafe { cf_handle.CFRelease(cf_lookup_key) }); + + let value: CFTypeRef = + unsafe { cf_handle.CFDictionaryGetValue(plist, cf_lookup_key) }.cast_mut(); + // `CFDictionaryGetValue` is a "getter", so we should not release, + // the value is held alive internally by the CFDictionary, see: + // https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/MemoryMgmt/Articles/mmPractical.html#//apple_ref/doc/uid/TP40004447-SW12 + if value.is_null() { + return None; + } + + assert_eq!( + unsafe { cf_handle.CFGetTypeID(value) }, + unsafe { cf_handle.CFStringGetTypeID() }, + "key in SystemVersion.plist must be a string" + ); + let value: CFStringRef = value.cast(); + + let mut version_str = [0u8; 32]; + let ret = unsafe { + cf_handle.CFStringGetCString( + value, + version_str.as_mut_ptr().cast::(), + version_str.len() as CFIndex, + kCFStringEncodingUTF8, + ) + }; + assert_ne!(ret, 0, "failed getting string from CFString"); + + let version_str = + CStr::from_bytes_until_nul(&version_str).expect("failed converting CFString to CStr"); + + Some(parse_os_version(version_str.to_bytes()).unwrap_or_else(|err| { + panic!( + "failed parsing version from PList ({}): {err}", + ByteStr::new(version_str.to_bytes()) + ) + })) +} + +/// Parse an OS version from a bytestring like b"10.1" or b"14.3.7". +fn parse_os_version(version: &[u8]) -> Result { + if let Some((major, minor)) = version.split_once(|&b| b == b'.') { + let major = u16::from_ascii(major)?; + if let Some((minor, patch)) = minor.split_once(|&b| b == b'.') { + let minor = u8::from_ascii(minor)?; + let patch = u8::from_ascii(patch)?; + Ok(pack_os_version(major, minor, patch)) + } else { + let minor = u8::from_ascii(minor)?; + Ok(pack_os_version(major, minor, 0)) + } + } else { + let major = u16::from_ascii(version)?; + Ok(pack_os_version(major, 0, 0)) + } +} + +/// Get a path relative to the root directory in which all files for the current env are located. +fn root_relative(path: &str) -> Cow<'_, Path> { + if cfg!(target_abi = "sim") { + let mut root = PathBuf::from(env::var_os("IPHONE_SIMULATOR_ROOT").expect( + "environment variable `IPHONE_SIMULATOR_ROOT` must be set when executing under simulator", + )); + // Convert absolute path to relative path, to make the `.push` work as expected. + root.push(Path::new(path).strip_prefix("/").unwrap()); + root.into() + } else { + Path::new(path).into() + } +} + +struct Deferred(F); + +impl Drop for Deferred { + fn drop(&mut self) { + (self.0)(); + } +} diff --git a/library/std/src/sys/platform_version/darwin/public_extern.rs b/library/std/src/sys/platform_version/darwin/public_extern.rs new file mode 100644 index 000000000000..967cdb4920fd --- /dev/null +++ b/library/std/src/sys/platform_version/darwin/public_extern.rs @@ -0,0 +1,151 @@ +//! # Runtime version checking ABI for other compilers. +//! +//! The symbols in this file are useful for us to expose to allow linking code written in the +//! following languages when using their version checking functionality: +//! - Clang's `__builtin_available` macro. +//! - Objective-C's `@available`. +//! - Swift's `#available`, +//! +//! Without Rust exposing these symbols, the user would encounter a linker error when linking to +//! C/Objective-C/Swift libraries using these features. +//! +//! The presence of these symbols is mostly considered a quality-of-implementation detail, and +//! should not be relied upon to be available. The intended effect is that linking with code built +//! with Clang's `__builtin_available` (or similar) will continue to work. For example, we may +//! decide to remove `__isOSVersionAtLeast` if support for Clang 11 (Xcode 11) is dropped. +//! +//! ## Background +//! +//! The original discussion of this feature can be found at: +//! - +//! - +//! - +//! +//! And the upstream implementation of these can be found in `compiler-rt`: +//! +//! +//! Ideally, these symbols should probably have been a part of Apple's `libSystem.dylib`, both +//! because their implementation is quite complex, using allocation, environment variables, file +//! access and dynamic library loading (and emitting all of this into every binary). +//! +//! The reason why Apple chose to not do that originally is lost to the sands of time, but a good +//! reason would be that implementing it as part of `compiler-rt` allowed them to back-deploy this +//! to older OSes immediately. +//! +//! In Rust's case, while we may provide a feature similar to `@available` in the future, we will +//! probably do so as a macro exposed by `std` (and not as a compiler builtin). So implementing this +//! in `std` makes sense, since then we can implement it using `std` utilities, and we can avoid +//! having `compiler-builtins` depend on `libSystem.dylib`. +//! +//! This does mean that users that attempt to link C/Objective-C/Swift code _and_ use `#![no_std]` +//! in all their crates may get a linker error because these symbols are missing. Using `no_std` is +//! quite uncommon on Apple systems though, so it's probably fine to not support this use-case. +//! +//! The workaround would be to link `libclang_rt.osx.a` or otherwise use Clang's `compiler-rt`. +//! +//! See also discussion in . +//! +//! ## Implementation details +//! +//! NOTE: Since macOS 10.15, `libSystem.dylib` _has_ actually provided the undocumented +//! `_availability_version_check` via `libxpc` for doing the version lookup (zippered, which is why +//! it requires a platform parameter to differentiate between macOS and Mac Catalyst), though its +//! usage may be a bit dangerous, see: +//! - +//! - +//! +//! Besides, we'd need to implement the version lookup via PList to support older versions anyhow, +//! so we might as well use that everywhere (since it can also be optimized more after inlining). + +#![allow(non_snake_case)] + +use super::{current_version, pack_i32_os_version}; + +/// Whether the current platform's OS version is higher than or equal to the given version. +/// +/// The first argument is the _base_ Mach-O platform (i.e. `PLATFORM_MACOS`, `PLATFORM_IOS`, etc., +/// but not `PLATFORM_IOSSIMULATOR` or `PLATFORM_MACCATALYST`) of the invoking binary. +/// +/// Arguments are specified statically by Clang. Inlining with LTO should allow the versions to be +/// combined into a single `u32`, which should make comparisons faster, and should make the +/// `BASE_TARGET_PLATFORM` check a no-op. +// +// SAFETY: The signature is the same as what Clang expects, and we export weakly to allow linking +// both this and `libclang_rt.*.a`, similar to how `compiler-builtins` does it: +// https://github.com/rust-lang/compiler-builtins/blob/0.1.113/src/macros.rs#L494 +// +// NOTE: This symbol has a workaround in the compiler's symbol mangling to avoid mangling it, while +// still not exposing it from non-cdylib (like `#[no_mangle]` would). +#[rustc_std_internal_symbol] +// extern "C" is correct, Clang assumes the function cannot unwind: +// https://github.com/llvm/llvm-project/blob/llvmorg-20.1.0/clang/lib/CodeGen/CGObjC.cpp#L3980 +// +// If an error happens in this, we instead abort the process. +pub(super) extern "C" fn __isPlatformVersionAtLeast( + platform: i32, + major: i32, + minor: i32, + subminor: i32, +) -> i32 { + let version = pack_i32_os_version(major, minor, subminor); + + // Mac Catalyst is a technology that allows macOS to run in a different "mode" that closely + // resembles iOS (and has iOS libraries like UIKit available). + // + // (Apple has added a "Designed for iPad" mode later on that allows running iOS apps + // natively, but we don't need to think too much about those, since they link to + // iOS-specific system binaries as well). + // + // To support Mac Catalyst, Apple added the concept of a "zippered" binary, which is a single + // binary that can be run on both macOS and Mac Catalyst (has two `LC_BUILD_VERSION` Mach-O + // commands, one set to `PLATFORM_MACOS` and one to `PLATFORM_MACCATALYST`). + // + // Most system libraries are zippered, which allows re-use across macOS and Mac Catalyst. + // This includes the `libclang_rt.osx.a` shipped with Xcode! This means that `compiler-rt` + // can't statically know whether it's compiled for macOS or Mac Catalyst, and thus this new + // API (which replaces `__isOSVersionAtLeast`) is needed. + // + // In short: + // normal binary calls normal compiler-rt --> `__isOSVersionAtLeast` was enough + // normal binary calls zippered compiler-rt --> `__isPlatformVersionAtLeast` required + // zippered binary calls zippered compiler-rt --> `__isPlatformOrVariantPlatformVersionAtLeast` called + + // FIXME(madsmtm): `rustc` doesn't support zippered binaries yet, see rust-lang/rust#131216. + // But once it does, we need the pre-compiled `std` shipped with rustup to be zippered, and thus + // we also need to handle the `platform` difference here: + // + // if cfg!(target_os = "macos") && platform == 2 /* PLATFORM_IOS */ && cfg!(zippered) { + // return (version.to_u32() <= current_ios_version()) as i32; + // } + // + // `__isPlatformOrVariantPlatformVersionAtLeast` would also need to be implemented. + + // The base Mach-O platform for the current target. + const BASE_TARGET_PLATFORM: i32 = if cfg!(target_os = "macos") { + 1 // PLATFORM_MACOS + } else if cfg!(target_os = "ios") { + 2 // PLATFORM_IOS + } else if cfg!(target_os = "tvos") { + 3 // PLATFORM_TVOS + } else if cfg!(target_os = "watchos") { + 4 // PLATFORM_WATCHOS + } else if cfg!(target_os = "visionos") { + 11 // PLATFORM_VISIONOS + } else { + 0 // PLATFORM_UNKNOWN + }; + debug_assert_eq!( + platform, BASE_TARGET_PLATFORM, + "invalid platform provided to __isPlatformVersionAtLeast", + ); + + (version <= current_version()) as i32 +} + +/// Old entry point for availability. Used when compiling with older Clang versions. +// SAFETY: Same as for `__isPlatformVersionAtLeast`. +#[rustc_std_internal_symbol] +pub(super) extern "C" fn __isOSVersionAtLeast(major: i32, minor: i32, subminor: i32) -> i32 { + let version = pack_i32_os_version(major, minor, subminor); + (version <= current_version()) as i32 +} diff --git a/library/std/src/sys/platform_version/darwin/tests.rs b/library/std/src/sys/platform_version/darwin/tests.rs new file mode 100644 index 000000000000..76dc4482c983 --- /dev/null +++ b/library/std/src/sys/platform_version/darwin/tests.rs @@ -0,0 +1,379 @@ +use super::public_extern::*; +use super::*; +use crate::process::Command; + +#[test] +fn test_general_available() { + // Lowest version always available. + assert_eq!(__isOSVersionAtLeast(0, 0, 0), 1); + // This high version never available. + assert_eq!(__isOSVersionAtLeast(9999, 99, 99), 0); +} + +#[test] +fn test_saturating() { + // Higher version than supported by OSVersion -> make sure we saturate. + assert_eq!(__isOSVersionAtLeast(0x10000, 0, 0), 0); +} + +#[test] +#[cfg_attr(not(target_os = "macos"), ignore = "`sw_vers` is only available on host macOS")] +fn compare_against_sw_vers() { + let sw_vers = Command::new("sw_vers").arg("-productVersion").output().unwrap().stdout; + let sw_vers = String::from_utf8(sw_vers).unwrap(); + let mut sw_vers = sw_vers.trim().split('.'); + + let major: i32 = sw_vers.next().unwrap().parse().unwrap(); + let minor: i32 = sw_vers.next().unwrap_or("0").parse().unwrap(); + let subminor: i32 = sw_vers.next().unwrap_or("0").parse().unwrap(); + assert_eq!(sw_vers.count(), 0); + + // Current version is available + assert_eq!(__isOSVersionAtLeast(major, minor, subminor), 1); + + // One lower is available + assert_eq!(__isOSVersionAtLeast(major, minor, subminor.saturating_sub(1)), 1); + assert_eq!(__isOSVersionAtLeast(major, minor.saturating_sub(1), subminor), 1); + assert_eq!(__isOSVersionAtLeast(major.saturating_sub(1), minor, subminor), 1); + + // One higher isn't available + assert_eq!(__isOSVersionAtLeast(major, minor, subminor + 1), 0); + assert_eq!(__isOSVersionAtLeast(major, minor + 1, subminor), 0); + assert_eq!(__isOSVersionAtLeast(major + 1, minor, subminor), 0); + + // Test directly against the lookup + assert_eq!(lookup_version().get(), pack_os_version(major as _, minor as _, subminor as _)); +} + +#[test] +fn sysctl_same_as_in_plist() { + if let Some(version) = version_from_sysctl() { + assert_eq!(version, version_from_plist()); + } +} + +#[test] +fn lookup_idempotent() { + let version = lookup_version(); + for _ in 0..10 { + assert_eq!(version, lookup_version()); + } +} + +/// Test parsing a bunch of different PLists found in the wild, to ensure that +/// if we decide to parse it without CoreFoundation in the future, that it +/// would continue to work, even on older platforms. +#[test] +fn parse_plist() { + #[track_caller] + fn check( + (major, minor, patch): (u16, u8, u8), + ios_version: Option<(u16, u8, u8)>, + plist: &str, + ) { + let expected = if cfg!(target_os = "ios") { + if let Some((ios_major, ios_minor, ios_patch)) = ios_version { + pack_os_version(ios_major, ios_minor, ios_patch) + } else if cfg!(target_abi = "macabi") { + // Skip checking iOS version on Mac Catalyst. + return; + } else { + // iOS version will be parsed from ProductVersion + pack_os_version(major, minor, patch) + } + } else { + pack_os_version(major, minor, patch) + }; + let cf_handle = CFHandle::new(); + assert_eq!(expected, parse_version_from_plist(&cf_handle, plist.as_bytes())); + } + + // macOS 10.3.0 + let plist = r#" + + + + ProductBuildVersion + 7B85 + ProductCopyright + Apple Computer, Inc. 1983-2003 + ProductName + Mac OS X + ProductUserVisibleVersion + 10.3 + ProductVersion + 10.3 + + + "#; + check((10, 3, 0), None, plist); + + // macOS 10.7.5 + let plist = r#" + + + + ProductBuildVersion + 11G63 + ProductCopyright + 1983-2012 Apple Inc. + ProductName + Mac OS X + ProductUserVisibleVersion + 10.7.5 + ProductVersion + 10.7.5 + + + "#; + check((10, 7, 5), None, plist); + + // macOS 14.7.4 + let plist = r#" + + + + BuildID + 6A558D8A-E2EA-11EF-A1D3-6222CAA672A8 + ProductBuildVersion + 23H420 + ProductCopyright + 1983-2025 Apple Inc. + ProductName + macOS + ProductUserVisibleVersion + 14.7.4 + ProductVersion + 14.7.4 + iOSSupportVersion + 17.7 + + + "#; + check((14, 7, 4), Some((17, 7, 0)), plist); + + // SystemVersionCompat.plist on macOS 14.7.4 + let plist = r#" + + + + BuildID + 6A558D8A-E2EA-11EF-A1D3-6222CAA672A8 + ProductBuildVersion + 23H420 + ProductCopyright + 1983-2025 Apple Inc. + ProductName + Mac OS X + ProductUserVisibleVersion + 10.16 + ProductVersion + 10.16 + iOSSupportVersion + 17.7 + + + "#; + check((10, 16, 0), Some((17, 7, 0)), plist); + + // macOS 15.4 Beta 24E5238a + let plist = r#" + + + + BuildID + 67A50F62-00DA-11F0-BDB6-F99BB8310D2A + ProductBuildVersion + 24E5238a + ProductCopyright + 1983-2025 Apple Inc. + ProductName + macOS + ProductUserVisibleVersion + 15.4 + ProductVersion + 15.4 + iOSSupportVersion + 18.4 + + + "#; + check((15, 4, 0), Some((18, 4, 0)), plist); + + // iOS Simulator 17.5 + let plist = r#" + + + + BuildID + 210B8A2C-09C3-11EF-9DB8-273A64AEFA1C + ProductBuildVersion + 21F79 + ProductCopyright + 1983-2024 Apple Inc. + ProductName + iPhone OS + ProductVersion + 17.5 + + + "#; + check((17, 5, 0), None, plist); + + // visionOS Simulator 2.3 + let plist = r#" + + + + BuildID + 57CEFDE6-D079-11EF-837C-8B8C7961D0AC + ProductBuildVersion + 22N895 + ProductCopyright + 1983-2025 Apple Inc. + ProductName + xrOS + ProductVersion + 2.3 + SystemImageID + D332C7F1-08DF-4DD9-8122-94EF39A1FB92 + iOSSupportVersion + 18.3 + + + "#; + check((2, 3, 0), Some((18, 3, 0)), plist); + + // tvOS Simulator 18.2 + let plist = r#" + + + + BuildID + 617587B0-B059-11EF-BE70-4380EDE44645 + ProductBuildVersion + 22K154 + ProductCopyright + 1983-2024 Apple Inc. + ProductName + Apple TVOS + ProductVersion + 18.2 + SystemImageID + 8BB5A425-33F0-4821-9F93-40E7ED92F4E0 + + + "#; + check((18, 2, 0), None, plist); + + // watchOS Simulator 11.2 + let plist = r#" + + + + BuildID + BAAE2D54-B122-11EF-BF78-C6C6836B724A + ProductBuildVersion + 22S99 + ProductCopyright + 1983-2024 Apple Inc. + ProductName + Watch OS + ProductVersion + 11.2 + SystemImageID + 79F773E2-2041-43B4-98EE-FAE52402AE95 + + + "#; + check((11, 2, 0), None, plist); + + // iOS 9.3.6 + let plist = r#" + + + + ProductBuildVersion + 13G37 + ProductCopyright + 1983-2019 Apple Inc. + ProductName + iPhone OS + ProductVersion + 9.3.6 + + + "#; + check((9, 3, 6), None, plist); +} + +#[test] +#[should_panic = "SystemVersion.plist did not contain a dictionary at the top level"] +fn invalid_plist() { + let cf_handle = CFHandle::new(); + let _ = parse_version_from_plist(&cf_handle, b"INVALID"); +} + +#[test] +#[cfg_attr( + target_abi = "macabi", + should_panic = "expected iOSSupportVersion in SystemVersion.plist" +)] +#[cfg_attr( + not(target_abi = "macabi"), + should_panic = "expected ProductVersion in SystemVersion.plist" +)] +fn empty_plist() { + let plist = r#" + + + + + + "#; + let cf_handle = CFHandle::new(); + let _ = parse_version_from_plist(&cf_handle, plist.as_bytes()); +} + +#[test] +fn parse_version() { + #[track_caller] + fn check(major: u16, minor: u8, patch: u8, version: &str) { + assert_eq!( + pack_os_version(major, minor, patch), + parse_os_version(version.as_bytes()).unwrap() + ) + } + + check(0, 0, 0, "0"); + check(0, 0, 0, "0.0.0"); + check(1, 0, 0, "1"); + check(1, 2, 0, "1.2"); + check(1, 2, 3, "1.2.3"); + check(9999, 99, 99, "9999.99.99"); + + // Check leading zeroes + check(10, 0, 0, "010"); + check(10, 20, 0, "010.020"); + check(10, 20, 30, "010.020.030"); + check(10000, 100, 100, "000010000.00100.00100"); + + // Too many parts + assert!(parse_os_version(b"1.2.3.4").is_err()); + + // Empty + assert!(parse_os_version(b"").is_err()); + + // Invalid digit + assert!(parse_os_version(b"A.B").is_err()); + + // Missing digits + assert!(parse_os_version(b".").is_err()); + assert!(parse_os_version(b".1").is_err()); + assert!(parse_os_version(b"1.").is_err()); + + // Too large + assert!(parse_os_version(b"100000").is_err()); + assert!(parse_os_version(b"1.1000").is_err()); + assert!(parse_os_version(b"1.1.1000").is_err()); +} diff --git a/library/std/src/sys/platform_version/mod.rs b/library/std/src/sys/platform_version/mod.rs new file mode 100644 index 000000000000..88896c97ea3a --- /dev/null +++ b/library/std/src/sys/platform_version/mod.rs @@ -0,0 +1,13 @@ +//! Runtime lookup of operating system / platform version. +//! +//! Related to [RFC 3750](https://github.com/rust-lang/rfcs/pull/3750), which +//! does version detection at compile-time. +//! +//! See also the `os_info` crate. + +#[cfg(target_vendor = "apple")] +mod darwin; + +// In the future, we could expand this module with: +// - `RtlGetVersion` on Windows. +// - `__system_property_get` on Android. diff --git a/library/std/tests/floats/f32.rs b/library/std/tests/floats/f32.rs index c61a8ec4d209..c29d803b25e4 100644 --- a/library/std/tests/floats/f32.rs +++ b/library/std/tests/floats/f32.rs @@ -79,8 +79,8 @@ fn test_log() { let nan: f32 = f32::NAN; let inf: f32 = f32::INFINITY; let neg_inf: f32 = f32::NEG_INFINITY; - assert_approx_eq!(10.0f32.log(10.0), 1.0, APPROX_DELTA); - assert_approx_eq!(2.3f32.log(3.5), 0.664858, APPROX_DELTA); + assert_approx_eq!(10.0f32.log(10.0), 1.0); + assert_approx_eq!(2.3f32.log(3.5), 0.664858); assert_approx_eq!(1.0f32.exp().log(1.0f32.exp()), 1.0, APPROX_DELTA); assert!(1.0f32.log(1.0).is_nan()); assert!(1.0f32.log(-13.9).is_nan()); @@ -140,10 +140,10 @@ fn test_asinh() { assert_approx_eq!(2.0f32.asinh(), 1.443635475178810342493276740273105f32); assert_approx_eq!((-2.0f32).asinh(), -1.443635475178810342493276740273105f32); // regression test for the catastrophic cancellation fixed in 72486 - assert_approx_eq!((-3000.0f32).asinh(), -8.699514775987968673236893537700647f32); + assert_approx_eq!((-3000.0f32).asinh(), -8.699514775987968673236893537700647f32, APPROX_DELTA); // test for low accuracy from issue 104548 - assert_approx_eq!(60.0f32, 60.0f32.sinh().asinh()); + assert_approx_eq!(60.0f32, 60.0f32.sinh().asinh(), APPROX_DELTA); // mul needed for approximate comparison to be meaningful assert_approx_eq!(1.0f32, 1e-15f32.sinh().asinh() * 1e15f32); } @@ -196,8 +196,8 @@ fn test_gamma() { assert_approx_eq!(1.0f32.gamma(), 1.0f32); assert_approx_eq!(2.0f32.gamma(), 1.0f32); assert_approx_eq!(3.0f32.gamma(), 2.0f32); - assert_approx_eq!(4.0f32.gamma(), 6.0f32); - assert_approx_eq!(5.0f32.gamma(), 24.0f32); + assert_approx_eq!(4.0f32.gamma(), 6.0f32, APPROX_DELTA); + assert_approx_eq!(5.0f32.gamma(), 24.0f32, APPROX_DELTA); assert_approx_eq!(0.5f32.gamma(), consts::PI.sqrt()); assert_approx_eq!((-0.5f32).gamma(), -2.0 * consts::PI.sqrt()); assert_eq!(0.0f32.gamma(), f32::INFINITY); @@ -218,7 +218,7 @@ fn test_ln_gamma() { assert_eq!(2.0f32.ln_gamma().1, 1); assert_approx_eq!(3.0f32.ln_gamma().0, 2.0f32.ln()); assert_eq!(3.0f32.ln_gamma().1, 1); - assert_approx_eq!((-0.5f32).ln_gamma().0, (2.0 * consts::PI.sqrt()).ln()); + assert_approx_eq!((-0.5f32).ln_gamma().0, (2.0 * consts::PI.sqrt()).ln(), APPROX_DELTA); assert_eq!((-0.5f32).ln_gamma().1, -1); } diff --git a/library/std_detect/src/detect/os/linux/aarch64.rs b/library/std_detect/src/detect/os/linux/aarch64.rs index 87a9d6ebb887..b733b8a9eb23 100644 --- a/library/std_detect/src/detect/os/linux/aarch64.rs +++ b/library/std_detect/src/detect/os/linux/aarch64.rs @@ -140,7 +140,7 @@ struct AtHwcap { impl From for AtHwcap { /// Reads AtHwcap from the auxiliary vector. fn from(auxv: auxvec::AuxVec) -> Self { - AtHwcap { + let mut cap = AtHwcap { fp: bit::test(auxv.hwcap, 0), asimd: bit::test(auxv.hwcap, 1), // evtstrm: bit::test(auxv.hwcap, 2), @@ -207,39 +207,50 @@ impl From for AtHwcap { // smef32f32: bit::test(auxv.hwcap2, 29), smefa64: bit::test(auxv.hwcap2, 30), wfxt: bit::test(auxv.hwcap2, 31), - // ebf16: bit::test(auxv.hwcap2, 32), - // sveebf16: bit::test(auxv.hwcap2, 33), - cssc: bit::test(auxv.hwcap2, 34), - // rprfm: bit::test(auxv.hwcap2, 35), - sve2p1: bit::test(auxv.hwcap2, 36), - sme2: bit::test(auxv.hwcap2, 37), - sme2p1: bit::test(auxv.hwcap2, 38), - // smei16i32: bit::test(auxv.hwcap2, 39), - // smebi32i32: bit::test(auxv.hwcap2, 40), - smeb16b16: bit::test(auxv.hwcap2, 41), - smef16f16: bit::test(auxv.hwcap2, 42), - mops: bit::test(auxv.hwcap2, 43), - hbc: bit::test(auxv.hwcap2, 44), - sveb16b16: bit::test(auxv.hwcap2, 45), - lrcpc3: bit::test(auxv.hwcap2, 46), - lse128: bit::test(auxv.hwcap2, 47), - fpmr: bit::test(auxv.hwcap2, 48), - lut: bit::test(auxv.hwcap2, 49), - faminmax: bit::test(auxv.hwcap2, 50), - f8cvt: bit::test(auxv.hwcap2, 51), - f8fma: bit::test(auxv.hwcap2, 52), - f8dp4: bit::test(auxv.hwcap2, 53), - f8dp2: bit::test(auxv.hwcap2, 54), - f8e4m3: bit::test(auxv.hwcap2, 55), - f8e5m2: bit::test(auxv.hwcap2, 56), - smelutv2: bit::test(auxv.hwcap2, 57), - smef8f16: bit::test(auxv.hwcap2, 58), - smef8f32: bit::test(auxv.hwcap2, 59), - smesf8fma: bit::test(auxv.hwcap2, 60), - smesf8dp4: bit::test(auxv.hwcap2, 61), - smesf8dp2: bit::test(auxv.hwcap2, 62), - // pauthlr: bit::test(auxv.hwcap2, ??), + ..Default::default() + }; + + // Hardware capabilities from bits 32 to 63 should only + // be tested on LP64 targets with 64 bits `usize`. + // On ILP32 targets like `aarch64-unknown-linux-gnu_ilp32`, + // these hardware capabilities will default to `false`. + // https://github.com/rust-lang/rust/issues/146230 + #[cfg(target_pointer_width = "64")] + { + // cap.ebf16: bit::test(auxv.hwcap2, 32); + // cap.sveebf16: bit::test(auxv.hwcap2, 33); + cap.cssc = bit::test(auxv.hwcap2, 34); + // cap.rprfm: bit::test(auxv.hwcap2, 35); + cap.sve2p1 = bit::test(auxv.hwcap2, 36); + cap.sme2 = bit::test(auxv.hwcap2, 37); + cap.sme2p1 = bit::test(auxv.hwcap2, 38); + // cap.smei16i32 = bit::test(auxv.hwcap2, 39); + // cap.smebi32i32 = bit::test(auxv.hwcap2, 40); + cap.smeb16b16 = bit::test(auxv.hwcap2, 41); + cap.smef16f16 = bit::test(auxv.hwcap2, 42); + cap.mops = bit::test(auxv.hwcap2, 43); + cap.hbc = bit::test(auxv.hwcap2, 44); + cap.sveb16b16 = bit::test(auxv.hwcap2, 45); + cap.lrcpc3 = bit::test(auxv.hwcap2, 46); + cap.lse128 = bit::test(auxv.hwcap2, 47); + cap.fpmr = bit::test(auxv.hwcap2, 48); + cap.lut = bit::test(auxv.hwcap2, 49); + cap.faminmax = bit::test(auxv.hwcap2, 50); + cap.f8cvt = bit::test(auxv.hwcap2, 51); + cap.f8fma = bit::test(auxv.hwcap2, 52); + cap.f8dp4 = bit::test(auxv.hwcap2, 53); + cap.f8dp2 = bit::test(auxv.hwcap2, 54); + cap.f8e4m3 = bit::test(auxv.hwcap2, 55); + cap.f8e5m2 = bit::test(auxv.hwcap2, 56); + cap.smelutv2 = bit::test(auxv.hwcap2, 57); + cap.smef8f16 = bit::test(auxv.hwcap2, 58); + cap.smef8f32 = bit::test(auxv.hwcap2, 59); + cap.smesf8fma = bit::test(auxv.hwcap2, 60); + cap.smesf8dp4 = bit::test(auxv.hwcap2, 61); + cap.smesf8dp2 = bit::test(auxv.hwcap2, 62); + // cap.pauthlr = bit::test(auxv.hwcap2, ??); } + cap } } diff --git a/package-lock.json b/package-lock.json index 44e8b65c28d9..def0cfa86a58 100644 --- a/package-lock.json +++ b/package-lock.json @@ -5,7 +5,7 @@ "packages": { "": { "dependencies": { - "browser-ui-test": "^0.21.3", + "browser-ui-test": "^0.22.0", "es-check": "^6.2.1", "eslint": "^8.57.1", "eslint-js": "github:eslint/js", @@ -37,8 +37,6 @@ }, "node_modules/@caporal/core": { "version": "2.0.7", - "resolved": "https://registry.npmjs.org/@caporal/core/-/core-2.0.7.tgz", - "integrity": "sha512-OvKBEidoXUGT28RP3USXFdLgiR5kGCHfRXR1uBQznyxBHaWjGcpH+G1chRqyIVT82pQoJiauOZRIGlrpyAbRYQ==", "license": "MIT", "dependencies": { "@types/glob": "^7.1.1", @@ -61,8 +59,6 @@ }, "node_modules/@colors/colors": { "version": "1.6.0", - "resolved": "https://registry.npmjs.org/@colors/colors/-/colors-1.6.0.tgz", - "integrity": "sha512-Ir+AOibqzrIsL6ajt3Rz3LskB7OiMVHqltZmspbW/TJuTVuyOMirVqAkjfY6JISiLHgyNqicAC8AyHHGzNd/dA==", "license": "MIT", "engines": { "node": ">=0.1.90" @@ -70,8 +66,6 @@ }, "node_modules/@dabh/diagnostics": { "version": "2.0.3", - "resolved": "https://registry.npmjs.org/@dabh/diagnostics/-/diagnostics-2.0.3.tgz", - "integrity": "sha512-hrlQOIi7hAfzsMqlGSFyVucrx38O+j6wiGOf//H2ecvIEqYN4ADBSS2iLMh5UFyDunCNniUIPk/q3riFv45xRA==", "license": "MIT", "dependencies": { "colorspace": "1.1.x", @@ -81,8 +75,6 @@ }, "node_modules/@eslint-community/eslint-utils": { "version": "4.7.0", - 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"resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz", - "integrity": "sha512-XleUoc9uwGXqjWwXaUTZAmzMcFZ5858QA2vvx1Ur5xIcixXIP+8LnFDgRplU30us6teqdlskFfu+ae4K79Ooew==", "license": "MIT", "dependencies": { "prelude-ls": "^1.2.1" @@ -2939,8 +2546,6 @@ }, "node_modules/type-fest": { "version": "0.20.2", - "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.20.2.tgz", - "integrity": "sha512-Ne+eE4r0/iWnpAxD852z3A+N0Bt5RN//NjJwRd2VFHEmrywxf5vsZlh4R6lixl6B+wz/8d+maTSAkN1FIkI3LQ==", "license": "(MIT OR CC0-1.0)", "engines": { "node": ">=10" @@ -2951,8 +2556,6 @@ }, "node_modules/typescript": { "version": "5.8.3", - "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.3.tgz", - "integrity": "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==", "license": "Apache-2.0", "bin": { "tsc": "bin/tsc", @@ -2974,8 +2577,6 @@ }, "node_modules/untildify": { "version": "3.0.3", - "resolved": "https://registry.npmjs.org/untildify/-/untildify-3.0.3.tgz", - "integrity": "sha512-iSk/J8efr8uPT/Z4eSUywnqyrQU7DSdMfdqK4iWEaUVVmcP5JcnpRqmVMwcwcnmI1ATFNgC5V90u09tBynNFKA==", "license": "MIT", "engines": { "node": ">=4" @@ -2983,8 +2584,6 @@ }, "node_modules/uri-js": { "version": "4.4.1", - "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz", - "integrity": "sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg==", "license": "BSD-2-Clause", "dependencies": { "punycode": "^2.1.0" @@ -2998,14 +2597,10 @@ }, "node_modules/util-deprecate": { "version": "1.0.2", - "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz", - "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==", "license": "MIT" }, "node_modules/which": { "version": "2.0.2", - "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz", - "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==", "license": "ISC", "dependencies": { "isexe": "^2.0.0" @@ -3019,8 +2614,6 @@ }, "node_modules/winston": { "version": "3.17.0", - "resolved": "https://registry.npmjs.org/winston/-/winston-3.17.0.tgz", - "integrity": "sha512-DLiFIXYC5fMPxaRg832S6F5mJYvePtmO5G9v9IgUFPhXm9/GkXarH/TUrBAVzhTCzAj9anE/+GjrgXp/54nOgw==", "license": "MIT", "dependencies": { "@colors/colors": "^1.6.0", @@ -3041,8 +2634,6 @@ }, "node_modules/winston-transport": { "version": "4.9.0", - "resolved": "https://registry.npmjs.org/winston-transport/-/winston-transport-4.9.0.tgz", - "integrity": "sha512-8drMJ4rkgaPo1Me4zD/3WLfI/zPdA9o2IipKODunnGDcuqbHwjsbB79ylv04LCGGzU0xQ6vTznOMpQGaLhhm6A==", "license": "MIT", "dependencies": { "logform": "^2.7.0", @@ -3055,8 +2646,6 @@ }, "node_modules/word-wrap": { "version": "1.2.5", - "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz", - "integrity": "sha512-BN22B5eaMMI9UMtjrGd5g5eCYPpCPDUy0FJXbYsaT5zYxjFOckS53SQDE3pWkVoWpHXVb3BrYcEN4Twa55B5cA==", "license": "MIT", "engines": { "node": ">=0.10.0" @@ -3064,8 +2653,6 @@ }, "node_modules/wrap-ansi": { "version": "6.2.0", - "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz", - "integrity": "sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==", "license": "MIT", "dependencies": { "ansi-styles": "^4.0.0", @@ -3078,14 +2665,10 @@ }, "node_modules/wrap-ansi/node_modules/emoji-regex": { "version": "8.0.0", - "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz", - "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==", "license": "MIT" }, "node_modules/wrap-ansi/node_modules/is-fullwidth-code-point": { "version": "3.0.0", - "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz", - "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==", "license": "MIT", "engines": { "node": ">=8" @@ -3093,8 +2676,6 @@ }, "node_modules/wrap-ansi/node_modules/string-width": { "version": "4.2.3", - "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz", - "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==", "license": "MIT", "dependencies": { "emoji-regex": "^8.0.0", @@ -3107,8 +2688,6 @@ }, "node_modules/wrappy": { "version": "1.0.2", - "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz", - "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==", "license": "ISC" }, "node_modules/ws": { @@ -3209,8 +2788,6 @@ }, "node_modules/yocto-queue": { "version": "0.1.0", - "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz", - "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==", "license": "MIT", "engines": { "node": ">=10" diff --git a/package.json b/package.json index 04f4c501d1fb..976d63036341 100644 --- a/package.json +++ b/package.json @@ -1,6 +1,6 @@ { "dependencies": { - "browser-ui-test": "^0.21.3", + "browser-ui-test": "^0.22.0", "es-check": "^6.2.1", "eslint": "^8.57.1", "eslint-js": "github:eslint/js", diff --git a/src/bootstrap/mk/Makefile.in b/src/bootstrap/mk/Makefile.in index 82c05092dfa5..03caa764ccf4 100644 --- a/src/bootstrap/mk/Makefile.in +++ b/src/bootstrap/mk/Makefile.in @@ -76,7 +76,7 @@ check-aux: library/std \ $(BOOTSTRAP_ARGS) \ -- \ - --skip fs:: --skip net:: --skip process:: --skip sys::fd:: --skip sys::pal:: + --skip fs:: --skip net:: --skip process:: --skip sys:: # Also test some very target-specific modules on other targets # (making sure to cover an i686 target as well). $(Q)MIRIFLAGS="-Zmiri-disable-isolation" BOOTSTRAP_SKIP_TARGET_SANITY=1 \ diff --git a/src/bootstrap/src/core/build_steps/check.rs b/src/bootstrap/src/core/build_steps/check.rs index 49d12b64da51..043457f64e57 100644 --- a/src/bootstrap/src/core/build_steps/check.rs +++ b/src/bootstrap/src/core/build_steps/check.rs @@ -839,3 +839,9 @@ tool_check_step!(Linkchecker { mode: |_builder| Mode::ToolBootstrap, default: false }); + +tool_check_step!(BumpStage0 { + path: "src/tools/bump-stage0", + mode: |_builder| Mode::ToolBootstrap, + default: false +}); diff --git a/src/bootstrap/src/core/build_steps/doc.rs b/src/bootstrap/src/core/build_steps/doc.rs index eb198a0051ab..7865b6856593 100644 --- a/src/bootstrap/src/core/build_steps/doc.rs +++ b/src/bootstrap/src/core/build_steps/doc.rs @@ -575,6 +575,31 @@ impl Step for SharedAssets { FileType::Regular, ); + builder.copy_link( + &builder + .src + .join("src") + .join("librustdoc") + .join("html") + .join("static") + .join("images") + .join("favicon.svg"), + &out.join("favicon.svg"), + FileType::Regular, + ); + builder.copy_link( + &builder + .src + .join("src") + .join("librustdoc") + .join("html") + .join("static") + .join("images") + .join("favicon-32x32.png"), + &out.join("favicon-32x32.png"), + FileType::Regular, + ); + SharedAssetsPaths { version_info } } } @@ -965,9 +990,11 @@ macro_rules! tool_doc { ( $tool: ident, $path: literal, - $(rustc_private_tool = $rustc_private_tool:literal, )? - $(is_library = $is_library:expr,)? - $(crates = $crates:expr)? + mode = $mode:expr + $(, is_library = $is_library:expr )? + $(, crates = $crates:expr )? + // Subset of nightly features that are allowed to be used when documenting + $(, allow_features: $allow_features:expr )? ) => { #[derive(Debug, Clone, Hash, PartialEq, Eq)] pub struct $tool { @@ -988,20 +1015,29 @@ macro_rules! tool_doc { fn make_run(run: RunConfig<'_>) { let target = run.target; - let (build_compiler, mode) = if true $(&& $rustc_private_tool)? { - // Rustdoc needs the rustc sysroot available to build. - let compilers = RustcPrivateCompilers::new(run.builder, run.builder.top_stage, target); + let build_compiler = match $mode { + Mode::ToolRustcPrivate => { + // Rustdoc needs the rustc sysroot available to build. + let compilers = RustcPrivateCompilers::new(run.builder, run.builder.top_stage, target); - // Build rustc docs so that we generate relative links. - run.builder.ensure(Rustc::from_build_compiler(run.builder, compilers.build_compiler(), target)); - - (compilers.build_compiler(), Mode::ToolRustcPrivate) - } else { - // bootstrap/host tools have to be documented with the stage 0 compiler - (prepare_doc_compiler(run.builder, run.builder.host_target, 1), Mode::ToolBootstrap) + // Build rustc docs so that we generate relative links. + run.builder.ensure(Rustc::from_build_compiler(run.builder, compilers.build_compiler(), target)); + compilers.build_compiler() + } + Mode::ToolBootstrap => { + // bootstrap/host tools should be documented with the stage 0 compiler + prepare_doc_compiler(run.builder, run.builder.host_target, 1) + } + Mode::ToolTarget => { + // target tools should be documented with the in-tree compiler + prepare_doc_compiler(run.builder, run.builder.host_target, run.builder.top_stage) + } + _ => { + panic!("Unexpected tool mode for documenting: {:?}", $mode); + } }; - run.builder.ensure($tool { build_compiler, mode, target }); + run.builder.ensure($tool { build_compiler, mode: $mode, target }); } /// Generates documentation for a tool. @@ -1032,6 +1068,15 @@ macro_rules! tool_doc { source_type, &[], ); + let allow_features = { + let mut _value = ""; + $( _value = $allow_features; )? + _value + }; + + if !allow_features.is_empty() { + cargo.allow_features(allow_features); + } cargo.arg("-Zskip-rustdoc-fingerprint"); // Only include compiler crates, no dependencies of those, such as `libc`. @@ -1087,18 +1132,33 @@ macro_rules! tool_doc { tool_doc!( BuildHelper, "src/build_helper", - rustc_private_tool = false, + mode = Mode::ToolBootstrap, is_library = true, crates = ["build_helper"] ); -tool_doc!(Rustdoc, "src/tools/rustdoc", crates = ["rustdoc", "rustdoc-json-types"]); -tool_doc!(Rustfmt, "src/tools/rustfmt", crates = ["rustfmt-nightly", "rustfmt-config_proc_macro"]); -tool_doc!(Clippy, "src/tools/clippy", crates = ["clippy_config", "clippy_utils"]); -tool_doc!(Miri, "src/tools/miri", crates = ["miri"]); +tool_doc!( + Rustdoc, + "src/tools/rustdoc", + mode = Mode::ToolRustcPrivate, + crates = ["rustdoc", "rustdoc-json-types"] +); +tool_doc!( + Rustfmt, + "src/tools/rustfmt", + mode = Mode::ToolRustcPrivate, + crates = ["rustfmt-nightly", "rustfmt-config_proc_macro"] +); +tool_doc!( + Clippy, + "src/tools/clippy", + mode = Mode::ToolRustcPrivate, + crates = ["clippy_config", "clippy_utils"] +); +tool_doc!(Miri, "src/tools/miri", mode = Mode::ToolRustcPrivate, crates = ["miri"]); tool_doc!( Cargo, "src/tools/cargo", - rustc_private_tool = false, + mode = Mode::ToolTarget, crates = [ "cargo", "cargo-credential", @@ -1110,27 +1170,30 @@ tool_doc!( "crates-io", "mdman", "rustfix", - ] + ], + // Required because of the im-rc dependency of Cargo, which automatically opts into the + // "specialization" feature in its build script when it detects a nightly toolchain. + allow_features: "specialization" ); -tool_doc!(Tidy, "src/tools/tidy", rustc_private_tool = false, crates = ["tidy"]); +tool_doc!(Tidy, "src/tools/tidy", mode = Mode::ToolBootstrap, crates = ["tidy"]); tool_doc!( Bootstrap, "src/bootstrap", - rustc_private_tool = false, + mode = Mode::ToolBootstrap, is_library = true, crates = ["bootstrap"] ); tool_doc!( RunMakeSupport, "src/tools/run-make-support", - rustc_private_tool = false, + mode = Mode::ToolBootstrap, is_library = true, crates = ["run_make_support"] ); tool_doc!( Compiletest, "src/tools/compiletest", - rustc_private_tool = false, + mode = Mode::ToolBootstrap, is_library = true, crates = ["compiletest"] ); diff --git a/src/bootstrap/src/core/build_steps/test.rs b/src/bootstrap/src/core/build_steps/test.rs index cb81d738666a..4f839bdf7b83 100644 --- a/src/bootstrap/src/core/build_steps/test.rs +++ b/src/bootstrap/src/core/build_steps/test.rs @@ -1522,6 +1522,12 @@ test!(Pretty { }); test!(RunMake { path: "tests/run-make", mode: "run-make", suite: "run-make", default: true }); +test!(RunMakeCargo { + path: "tests/run-make-cargo", + mode: "run-make", + suite: "run-make-cargo", + default: true +}); test!(AssemblyLlvm { path: "tests/assembly-llvm", @@ -1773,7 +1779,7 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the target, }); } - if suite == "run-make" { + if mode == "run-make" { builder.tool_exe(Tool::RunMakeSupport); } @@ -1816,25 +1822,41 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the let is_rustdoc = suite == "rustdoc-ui" || suite == "rustdoc-js"; + // There are (potentially) 2 `cargo`s to consider: + // + // - A "bootstrap" cargo, which is the same cargo used to build bootstrap itself, and is + // used to build the `run-make` test recipes and the `run-make-support` test library. All + // of these may not use unstable rustc/cargo features. + // - An in-tree cargo, which should be considered as under test. The `run-make-cargo` test + // suite is intended to support the use case of testing the "toolchain" (that is, at the + // minimum the interaction between in-tree cargo + rustc) together. + // + // For build time and iteration purposes, we partition `run-make` tests which needs an + // in-tree cargo (a smaller subset) versus `run-make` tests that do not into two test + // suites, `run-make` and `run-make-cargo`. That way, contributors who do not need to run + // the `run-make` tests that need in-tree cargo do not need to spend time building in-tree + // cargo. if mode == "run-make" { - let cargo_path = if test_compiler.stage == 0 { - // If we're using `--stage 0`, we should provide the bootstrap cargo. - builder.initial_cargo.clone() - } else { - builder - .ensure(tool::Cargo::from_build_compiler( - builder.compiler(test_compiler.stage - 1, test_compiler.host), - test_compiler.host, - )) - .tool_path - }; - - cmd.arg("--cargo-path").arg(cargo_path); - // We need to pass the compiler that was used to compile run-make-support, // because we have to use the same compiler to compile rmake.rs recipes. let stage0_rustc_path = builder.compiler(0, test_compiler.host); cmd.arg("--stage0-rustc-path").arg(builder.rustc(stage0_rustc_path)); + + if suite == "run-make-cargo" { + let cargo_path = if test_compiler.stage == 0 { + // If we're using `--stage 0`, we should provide the bootstrap cargo. + builder.initial_cargo.clone() + } else { + builder + .ensure(tool::Cargo::from_build_compiler( + builder.compiler(test_compiler.stage - 1, test_compiler.host), + test_compiler.host, + )) + .tool_path + }; + + cmd.arg("--cargo-path").arg(cargo_path); + } } // Avoid depending on rustdoc when we don't need it. diff --git a/src/bootstrap/src/core/build_steps/tool.rs b/src/bootstrap/src/core/build_steps/tool.rs index c5308034fe30..6870bf3eddcd 100644 --- a/src/bootstrap/src/core/build_steps/tool.rs +++ b/src/bootstrap/src/core/build_steps/tool.rs @@ -121,9 +121,11 @@ impl Step for ToolBuild { cargo.env("RUSTC_WRAPPER", ccache); } - // Rustc tools (miri, clippy, cargo, rustfmt, rust-analyzer) + // RustcPrivate tools (miri, clippy, rustfmt, rust-analyzer) and cargo // could use the additional optimizations. - if self.mode == Mode::ToolRustcPrivate && is_lto_stage(&self.build_compiler) { + if is_lto_stage(&self.build_compiler) + && (self.mode == Mode::ToolRustcPrivate || self.path == "src/tools/cargo") + { let lto = match builder.config.rust_lto { RustcLto::Off => Some("off"), RustcLto::Thin => Some("thin"), diff --git a/src/bootstrap/src/core/builder/cargo.rs b/src/bootstrap/src/core/builder/cargo.rs index cca0c803e63b..924bb4adb42d 100644 --- a/src/bootstrap/src/core/builder/cargo.rs +++ b/src/bootstrap/src/core/builder/cargo.rs @@ -533,7 +533,7 @@ impl Builder<'_> { if cmd_kind == Kind::Doc { let my_out = match mode { // This is the intended out directory for compiler documentation. - Mode::Rustc | Mode::ToolRustcPrivate | Mode::ToolBootstrap => { + Mode::Rustc | Mode::ToolRustcPrivate | Mode::ToolBootstrap | Mode::ToolTarget => { self.compiler_doc_out(target) } Mode::Std => { diff --git a/src/bootstrap/src/core/builder/mod.rs b/src/bootstrap/src/core/builder/mod.rs index 627085df812c..75c8ee365284 100644 --- a/src/bootstrap/src/core/builder/mod.rs +++ b/src/bootstrap/src/core/builder/mod.rs @@ -444,6 +444,7 @@ const PATH_REMAP: &[(&str, &[&str])] = &[ "tests/mir-opt", "tests/pretty", "tests/run-make", + "tests/run-make-cargo", "tests/rustdoc", "tests/rustdoc-gui", "tests/rustdoc-js", @@ -1061,6 +1062,7 @@ impl<'a> Builder<'a> { check::FeaturesStatusDump, check::CoverageDump, check::Linkchecker, + check::BumpStage0, // This has special staging logic, it may run on stage 1 while others run on stage 0. // It takes quite some time to build stage 1, so put this at the end. // @@ -1127,8 +1129,8 @@ impl<'a> Builder<'a> { test::RustInstaller, test::TestFloatParse, test::CollectLicenseMetadata, - // Run run-make last, since these won't pass without make on Windows test::RunMake, + test::RunMakeCargo, ), Kind::Miri => describe!(test::Crate), Kind::Bench => describe!(test::Crate, test::CrateLibrustc), diff --git a/src/bootstrap/src/core/builder/tests.rs b/src/bootstrap/src/core/builder/tests.rs index 9e8c13eb4dec..89a0ab7711ee 100644 --- a/src/bootstrap/src/core/builder/tests.rs +++ b/src/bootstrap/src/core/builder/tests.rs @@ -1130,6 +1130,59 @@ mod snapshot { ); } + #[test] + fn dist_compiler_docs() { + let ctx = TestCtx::new(); + insta::assert_snapshot!( + ctx.config("dist") + .path("rustc-docs") + .args(&["--set", "build.compiler-docs=true"]) + .render_steps(), @r" + [build] rustc 0 -> UnstableBookGen 1 + [build] rustc 0 -> Rustbook 1 + [doc] unstable-book (book) + [build] llvm + [build] rustc 0 -> rustc 1 + [build] rustc 1 -> std 1 + [doc] book (book) + [doc] book/first-edition (book) + [doc] book/second-edition (book) + [doc] book/2018-edition (book) + [build] rustdoc 1 + [doc] rustc 1 -> standalone 2 + [doc] rustc 1 -> std 1 crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,rustc-std-workspace-core,std,std_detect,sysroot,test,unwind] + [doc] rustc 1 -> rustc 2 + [build] rustc 1 -> rustc 2 + [doc] rustc 1 -> Rustdoc 2 + [doc] rustc 1 -> Rustfmt 2 + [build] rustc 1 -> error-index 2 + [doc] rustc 1 -> error-index 2 + [doc] nomicon (book) + [doc] rustc 1 -> reference (book) 2 + [doc] rustdoc (book) + [doc] rust-by-example (book) + [build] rustc 0 -> LintDocs 1 + [doc] rustc (book) + [doc] rustc 1 -> Cargo 2 + [doc] cargo (book) + [doc] rustc 1 -> Clippy 2 + [doc] clippy (book) + [doc] rustc 1 -> Miri 2 + [doc] embedded-book (book) + [doc] edition-guide (book) + [doc] style-guide (book) + [build] rustdoc 0 + [doc] rustc 0 -> Tidy 1 + [doc] rustc 0 -> Bootstrap 1 + [doc] rustc 1 -> releases 2 + [doc] rustc 0 -> RunMakeSupport 1 + [doc] rustc 0 -> BuildHelper 1 + [doc] rustc 0 -> Compiletest 1 + [build] rustc 0 -> RustInstaller 1 + " + ); + } + #[test] fn dist_extended() { let ctx = TestCtx::new(); @@ -2099,8 +2152,9 @@ mod snapshot { [build] rustc 0 -> HtmlChecker 1 [test] html-check [build] rustc 0 -> RunMakeSupport 1 - [build] rustc 0 -> cargo 1 [test] compiletest-run-make 1 + [build] rustc 0 -> cargo 1 + [test] compiletest-run-make-cargo 1 "); } @@ -2118,7 +2172,6 @@ mod snapshot { [test] compiletest-ui 1 [test] compiletest-ui-fulldeps 1 [build] rustc 0 -> RunMakeSupport 1 - [build] rustc 0 -> cargo 1 [build] rustdoc 1 [test] compiletest-run-make 1 [test] compiletest-rustdoc 1 @@ -2147,7 +2200,6 @@ mod snapshot { [build] rustc 2 -> rustc 3 [test] compiletest-ui-fulldeps 2 [build] rustc 0 -> RunMakeSupport 1 - [build] rustc 1 -> cargo 2 [build] rustdoc 2 [test] compiletest-run-make 2 [test] compiletest-rustdoc 2 @@ -2181,7 +2233,6 @@ mod snapshot { [build] rustc 2 -> rustc 3 [test] compiletest-ui-fulldeps 2 [build] rustc 0 -> RunMakeSupport 1 - [build] rustc 1 -> cargo 2 [build] rustdoc 2 [test] compiletest-run-make 2 [test] compiletest-rustdoc 2 @@ -2276,8 +2327,9 @@ mod snapshot { [build] rustc 0 -> HtmlChecker 1 [test] html-check [build] rustc 0 -> RunMakeSupport 1 - [build] rustc 1 -> cargo 2 [test] compiletest-run-make 2 + [build] rustc 1 -> cargo 2 + [test] compiletest-run-make-cargo 2 "); } @@ -2411,6 +2463,43 @@ mod snapshot { "); } + // Differential snapshots for `./x test run-make` run `./x test run-make-cargo`: only + // `run-make-cargo` should build an in-tree cargo, running `./x test run-make` should not. + #[test] + fn test_run_make_no_cargo() { + let ctx = TestCtx::new(); + insta::assert_snapshot!( + ctx.config("test") + .path("run-make") + .render_steps(), @r" + [build] llvm + [build] rustc 0 -> rustc 1 + [build] rustc 0 -> RunMakeSupport 1 + [build] rustc 1 -> std 1 + [build] rustc 0 -> Compiletest 1 + [build] rustdoc 1 + [test] compiletest-run-make 1 + "); + } + + #[test] + fn test_run_make_cargo_builds_cargo() { + let ctx = TestCtx::new(); + insta::assert_snapshot!( + ctx.config("test") + .path("run-make-cargo") + .render_steps(), @r" + [build] llvm + [build] rustc 0 -> rustc 1 + [build] rustc 0 -> RunMakeSupport 1 + [build] rustc 1 -> std 1 + [build] rustc 0 -> Compiletest 1 + [build] rustc 0 -> cargo 1 + [build] rustdoc 1 + [test] compiletest-run-make-cargo 1 + "); + } + #[test] fn doc_all() { let ctx = TestCtx::new(); @@ -2462,6 +2551,33 @@ mod snapshot { "); } + #[test] + fn doc_cargo_stage_1() { + let ctx = TestCtx::new(); + insta::assert_snapshot!( + ctx.config("doc") + .path("cargo") + .render_steps(), @r" + [build] rustdoc 0 + [doc] rustc 0 -> Cargo 1 + "); + } + #[test] + fn doc_cargo_stage_2() { + let ctx = TestCtx::new(); + insta::assert_snapshot!( + ctx.config("doc") + .path("cargo") + .stage(2) + .render_steps(), @r" + [build] llvm + [build] rustc 0 -> rustc 1 + [build] rustc 1 -> std 1 + [build] rustdoc 1 + [doc] rustc 1 -> Cargo 2 + "); + } + #[test] fn doc_core() { let ctx = TestCtx::new(); diff --git a/src/ci/docker/host-aarch64/aarch64-gnu-debug/Dockerfile b/src/ci/docker/host-aarch64/aarch64-gnu-debug/Dockerfile index cf030f6830e5..71de8f917fa2 100644 --- a/src/ci/docker/host-aarch64/aarch64-gnu-debug/Dockerfile +++ b/src/ci/docker/host-aarch64/aarch64-gnu-debug/Dockerfile @@ -54,4 +54,4 @@ ENV RUST_CONFIGURE_ARGS \ ENV SCRIPT \ python3 ../x.py --stage 2 build && \ - python3 ../x.py --stage 2 test tests/run-make + python3 ../x.py --stage 2 test tests/run-make tests/run-make-cargo diff --git a/src/ci/docker/host-x86_64/dist-various-1/Dockerfile b/src/ci/docker/host-x86_64/dist-various-1/Dockerfile index 4d5980027cac..e59012ff6afa 100644 --- a/src/ci/docker/host-x86_64/dist-various-1/Dockerfile +++ b/src/ci/docker/host-x86_64/dist-various-1/Dockerfile @@ -158,7 +158,7 @@ ENV RUST_CONFIGURE_ARGS \ --disable-docs ENV SCRIPT \ - python3 ../x.py --stage 2 test --host='' --target $RUN_MAKE_TARGETS tests/run-make && \ + python3 ../x.py --stage 2 test --host='' --target $RUN_MAKE_TARGETS tests/run-make tests/run-make-cargo && \ python3 ../x.py dist --host='' --target $TARGETS # sccache diff --git a/src/ci/docker/host-x86_64/pr-check-2/Dockerfile b/src/ci/docker/host-x86_64/pr-check-2/Dockerfile index 8073b8efb46f..d6470e4deb8d 100644 --- a/src/ci/docker/host-x86_64/pr-check-2/Dockerfile +++ b/src/ci/docker/host-x86_64/pr-check-2/Dockerfile @@ -28,6 +28,7 @@ RUN sh /scripts/sccache.sh ENV SCRIPT \ python3 ../x.py check && \ + python3 ../x.py check src/tools/bump-stage0 && \ python3 ../x.py clippy ci --stage 2 && \ python3 ../x.py test --stage 1 core alloc std test proc_macro && \ python3 ../x.py test --stage 1 src/tools/compiletest && \ diff --git a/src/ci/docker/host-x86_64/test-various/Dockerfile b/src/ci/docker/host-x86_64/test-various/Dockerfile index 6ff529c9e718..e1c882d5b085 100644 --- a/src/ci/docker/host-x86_64/test-various/Dockerfile +++ b/src/ci/docker/host-x86_64/test-various/Dockerfile @@ -60,9 +60,10 @@ RUN curl -L https://github.com/bytecodealliance/wasmtime/releases/download/v19.0 tar -xJ ENV PATH "$PATH:/wasmtime-v19.0.0-x86_64-linux" -ENV WASM_WASIP_TARGET=wasm32-wasip1 +ENV WASM_WASIP_TARGET=wasm32-wasip1 ENV WASM_WASIP_SCRIPT python3 /checkout/x.py --stage 2 test --host='' --target $WASM_WASIP_TARGET \ tests/run-make \ + tests/run-make-cargo \ tests/ui \ tests/mir-opt \ tests/codegen-units \ @@ -73,6 +74,7 @@ ENV WASM_WASIP_SCRIPT python3 /checkout/x.py --stage 2 test --host='' --target $ ENV NVPTX_TARGETS=nvptx64-nvidia-cuda ENV NVPTX_SCRIPT python3 /checkout/x.py --stage 2 test --host='' --target $NVPTX_TARGETS \ tests/run-make \ + tests/run-make-cargo \ tests/assembly-llvm ENV MUSL_TARGETS=x86_64-unknown-linux-musl \ @@ -88,8 +90,8 @@ ENV UEFI_TARGETS=aarch64-unknown-uefi,i686-unknown-uefi,x86_64-unknown-uefi \ CC_x86_64_unknown_uefi=clang-11 \ CXX_x86_64_unknown_uefi=clang++-11 ENV UEFI_SCRIPT python3 /checkout/x.py --stage 2 build --host='' --target $UEFI_TARGETS && \ - python3 /checkout/x.py --stage 2 test tests/run-make/uefi-qemu/rmake.rs --target aarch64-unknown-uefi && \ - python3 /checkout/x.py --stage 2 test tests/run-make/uefi-qemu/rmake.rs --target i686-unknown-uefi && \ - python3 /checkout/x.py --stage 2 test tests/run-make/uefi-qemu/rmake.rs --target x86_64-unknown-uefi + python3 /checkout/x.py --stage 2 test tests/run-make-cargo/uefi-qemu/rmake.rs --target aarch64-unknown-uefi && \ + python3 /checkout/x.py --stage 2 test tests/run-make-cargo/uefi-qemu/rmake.rs --target i686-unknown-uefi && \ + python3 /checkout/x.py --stage 2 test tests/run-make-cargo/uefi-qemu/rmake.rs --target x86_64-unknown-uefi ENV SCRIPT $WASM_WASIP_SCRIPT && $NVPTX_SCRIPT && $MUSL_SCRIPT && $UEFI_SCRIPT diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-debug/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-debug/Dockerfile index 5052d86f0ac7..7e6a59aaf898 100644 --- a/src/ci/docker/host-x86_64/x86_64-gnu-debug/Dockerfile +++ b/src/ci/docker/host-x86_64/x86_64-gnu-debug/Dockerfile @@ -56,4 +56,4 @@ ENV RUST_CONFIGURE_ARGS \ ENV SCRIPT \ python3 ../x.py --stage 2 build && \ python3 ../x.py --stage 2 test tests/ui && \ - python3 ../x.py --stage 2 test tests/run-make + python3 ../x.py --stage 2 test tests/run-make tests/run-make-cargo diff --git a/src/doc/favicon.inc b/src/doc/favicon.inc index 9c330685209b..f09498cc0958 100644 --- a/src/doc/favicon.inc +++ b/src/doc/favicon.inc @@ -1 +1,2 @@ - + + diff --git a/src/doc/redirect.inc b/src/doc/redirect.inc index 2fb44be01451..1b7d3744b1fd 100644 --- a/src/doc/redirect.inc +++ b/src/doc/redirect.inc @@ -1,2 +1,3 @@ - + + diff --git a/src/doc/rustc-dev-guide/src/tests/adding.md b/src/doc/rustc-dev-guide/src/tests/adding.md index e5c26bef11d0..46b8a1e4cf4b 100644 --- a/src/doc/rustc-dev-guide/src/tests/adding.md +++ b/src/doc/rustc-dev-guide/src/tests/adding.md @@ -29,6 +29,8 @@ guidelines: suites. - Need to inspect the resulting binary in some way? Or if all the other test suites are too limited for your purposes? Then use `run-make`. + - Use `run-make-cargo` if you need to exercise in-tree `cargo` in conjunction + with in-tree `rustc`. - Check out the [compiletest] chapter for more specialized test suites. After deciding on which kind of test to add, see [best diff --git a/src/doc/rustc-dev-guide/src/tests/best-practices.md b/src/doc/rustc-dev-guide/src/tests/best-practices.md index be00207e3fb9..efc626035b79 100644 --- a/src/doc/rustc-dev-guide/src/tests/best-practices.md +++ b/src/doc/rustc-dev-guide/src/tests/best-practices.md @@ -83,10 +83,10 @@ related tests. - E.g. for an implementation of RFC 2093 specifically, we can group a collection of tests under `tests/ui/rfc-2093-infer-outlives/`. For the directory name, include what the RFC is about. -- For the [`run-make`] test suite, each `rmake.rs` must be contained within an - immediate subdirectory under `tests/run-make/`. Further nesting is not - presently supported. Avoid including issue number in the directory name too, - include that info in a comment inside `rmake.rs`. +- For the [`run-make`]/`run-make-support` test suites, each `rmake.rs` must + be contained within an immediate subdirectory under `tests/run-make/` or + `tests/run-make-cargo/` respectively. Further nesting is not presently + supported. Avoid using _only_ an issue number for the test name as well. ## Test descriptions diff --git a/src/doc/rustc-dev-guide/src/tests/compiletest.md b/src/doc/rustc-dev-guide/src/tests/compiletest.md index 4980ed845d6d..a4a729935fa4 100644 --- a/src/doc/rustc-dev-guide/src/tests/compiletest.md +++ b/src/doc/rustc-dev-guide/src/tests/compiletest.md @@ -397,13 +397,19 @@ your test, causing separate files to be generated for 32bit and 64bit systems. ### `run-make` tests -The tests in [`tests/run-make`] are general-purpose tests using Rust *recipes*, -which are small programs (`rmake.rs`) allowing arbitrary Rust code such as -`rustc` invocations, and is supported by a [`run_make_support`] library. Using -Rust recipes provide the ultimate in flexibility. +The tests in [`tests/run-make`] and [`tests/run-make-cargo`] are general-purpose +tests using Rust *recipes*, which are small programs (`rmake.rs`) allowing +arbitrary Rust code such as `rustc` invocations, and is supported by a +[`run_make_support`] library. Using Rust recipes provide the ultimate in +flexibility. `run-make` tests should be used if no other test suites better suit your needs. +The `run-make-cargo` test suite additionally builds an in-tree `cargo` to support +use cases that require testing in-tree `cargo` in conjunction with in-tree `rustc`. +The `run-make` test suite does not have access to in-tree `cargo` (so it can be the +faster-to-iterate test suite). + #### Using Rust recipes Each test should be in a separate directory with a `rmake.rs` Rust program, @@ -476,6 +482,7 @@ Then add a corresponding entry to `"rust-analyzer.linkedProjects"` ``` [`tests/run-make`]: https://github.com/rust-lang/rust/tree/master/tests/run-make +[`tests/run-make-cargo`]: https://github.com/rust-lang/rust/tree/master/tests/run-make-cargo [`run_make_support`]: https://github.com/rust-lang/rust/tree/master/src/tools/run-make-support ### Coverage tests diff --git a/src/doc/rustc-dev-guide/src/tests/directives.md b/src/doc/rustc-dev-guide/src/tests/directives.md index fbbeb7e97d3b..4ff6b7cb10f0 100644 --- a/src/doc/rustc-dev-guide/src/tests/directives.md +++ b/src/doc/rustc-dev-guide/src/tests/directives.md @@ -52,14 +52,14 @@ not be exhaustive. Directives can generally be found by browsing the See [Building auxiliary crates](compiletest.html#building-auxiliary-crates) -| Directive | Explanation | Supported test suites | Possible values | -|-----------------------|-------------------------------------------------------------------------------------------------------|-----------------------|-----------------------------------------------| -| `aux-bin` | Build a aux binary, made available in `auxiliary/bin` relative to test directory | All except `run-make` | Path to auxiliary `.rs` file | -| `aux-build` | Build a separate crate from the named source file | All except `run-make` | Path to auxiliary `.rs` file | -| `aux-crate` | Like `aux-build` but makes available as extern prelude | All except `run-make` | `=` | -| `aux-codegen-backend` | Similar to `aux-build` but pass the compiled dylib to `-Zcodegen-backend` when building the main file | `ui-fulldeps` | Path to codegen backend file | -| `proc-macro` | Similar to `aux-build`, but for aux forces host and don't use `-Cprefer-dynamic`[^pm]. | All except `run-make` | Path to auxiliary proc-macro `.rs` file | -| `build-aux-docs` | Build docs for auxiliaries as well. Note that this only works with `aux-build`, not `aux-crate`. | All except `run-make` | N/A | +| Directive | Explanation | Supported test suites | Possible values | +|-----------------------|-------------------------------------------------------------------------------------------------------|----------------------------------------|-----------------------------------------------| +| `aux-bin` | Build a aux binary, made available in `auxiliary/bin` relative to test directory | All except `run-make`/`run-make-cargo` | Path to auxiliary `.rs` file | +| `aux-build` | Build a separate crate from the named source file | All except `run-make`/`run-make-cargo` | Path to auxiliary `.rs` file | +| `aux-crate` | Like `aux-build` but makes available as extern prelude | All except `run-make`/`run-make-cargo` | `=` | +| `aux-codegen-backend` | Similar to `aux-build` but pass the compiled dylib to `-Zcodegen-backend` when building the main file | `ui-fulldeps` | Path to codegen backend file | +| `proc-macro` | Similar to `aux-build`, but for aux forces host and don't use `-Cprefer-dynamic`[^pm]. | All except `run-make`/`run-make-cargo` | Path to auxiliary proc-macro `.rs` file | +| `build-aux-docs` | Build docs for auxiliaries as well. Note that this only works with `aux-build`, not `aux-crate`. | All except `run-make`/`run-make-cargo` | N/A | [^pm]: please see the [Auxiliary proc-macro section](compiletest.html#auxiliary-proc-macro) in the compiletest chapter for specifics. @@ -243,18 +243,18 @@ ignoring debuggers. ### Affecting how tests are built -| Directive | Explanation | Supported test suites | Possible values | -|---------------------|----------------------------------------------------------------------------------------------|---------------------------|--------------------------------------------------------------------------------------------| -| `compile-flags` | Flags passed to `rustc` when building the test or aux file | All except for `run-make` | Any valid `rustc` flags, e.g. `-Awarnings -Dfoo`. Cannot be `-Cincremental` or `--edition` | -| `edition` | The edition used to build the test | All except for `run-make` | Any valid `--edition` value | -| `rustc-env` | Env var to set when running `rustc` | All except for `run-make` | `=` | -| `unset-rustc-env` | Env var to unset when running `rustc` | All except for `run-make` | Any env var name | -| `incremental` | Proper incremental support for tests outside of incremental test suite | `ui`, `crashes` | N/A | -| `no-prefer-dynamic` | Don't use `-C prefer-dynamic`, don't build as a dylib via a `--crate-type=dylib` preset flag | `ui`, `crashes` | N/A | +| Directive | Explanation | Supported test suites | Possible values | +|---------------------|----------------------------------------------------------------------------------------------|--------------------------------------------|--------------------------------------------------------------------------------------------| +| `compile-flags` | Flags passed to `rustc` when building the test or aux file | All except for `run-make`/`run-make-cargo` | Any valid `rustc` flags, e.g. `-Awarnings -Dfoo`. Cannot be `-Cincremental` or `--edition` | +| `edition` | The edition used to build the test | All except for `run-make`/`run-make-cargo` | Any valid `--edition` value | +| `rustc-env` | Env var to set when running `rustc` | All except for `run-make`/`run-make-cargo` | `=` | +| `unset-rustc-env` | Env var to unset when running `rustc` | All except for `run-make`/`run-make-cargo` | Any env var name | +| `incremental` | Proper incremental support for tests outside of incremental test suite | `ui`, `crashes` | N/A | +| `no-prefer-dynamic` | Don't use `-C prefer-dynamic`, don't build as a dylib via a `--crate-type=dylib` preset flag | `ui`, `crashes` | N/A |
-Tests (outside of `run-make`) that want to use incremental tests not in the +Tests (outside of `run-make`/`run-make-cargo`) that want to use incremental tests not in the incremental test-suite must not pass `-C incremental` via `compile-flags`, and must instead use the `//@ incremental` directive. @@ -264,9 +264,9 @@ Consider writing the test as a proper incremental test instead. ### Rustdoc -| Directive | Explanation | Supported test suites | Possible values | -|-------------|--------------------------------------------------------------|------------------------------------------|---------------------------| -| `doc-flags` | Flags passed to `rustdoc` when building the test or aux file | `rustdoc`, `rustdoc-js`, `rustdoc-json` | Any valid `rustdoc` flags | +| Directive | Explanation | Supported test suites | Possible values | +|-------------|--------------------------------------------------------------|-----------------------------------------|---------------------------| +| `doc-flags` | Flags passed to `rustdoc` when building the test or aux file | `rustdoc`, `rustdoc-js`, `rustdoc-json` | Any valid `rustdoc` flags | $DIR/invalid-rlib.rs:7:7 - | -LL | use ::foo; - | ^^^ - | - = note: failed to mmap file 'auxiliary/libfoo.rlib' - = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` - -error: aborting due to 2 previous errors +error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0786`. diff --git a/tests/ui/impl-trait/non-defining-uses/ice-issue-146191.current.stderr b/tests/ui/impl-trait/non-defining-uses/ice-issue-146191.current.stderr new file mode 100644 index 000000000000..ccbe2d3593c6 --- /dev/null +++ b/tests/ui/impl-trait/non-defining-uses/ice-issue-146191.current.stderr @@ -0,0 +1,29 @@ +error[E0277]: the trait bound `(): ReturnsSend` is not satisfied + --> $DIR/ice-issue-146191.rs:6:52 + | +LL | fn create_complex_future() -> impl Future { + | ^^^^^^^^^^^^^^^^ the trait `ReturnsSend` is not implemented for `()` + | +help: this trait has no implementations, consider adding one + --> $DIR/ice-issue-146191.rs:14:1 + | +LL | trait ReturnsSend {} + | ^^^^^^^^^^^^^^^^^ +note: required by a bound in an opaque type + --> $DIR/ice-issue-146191.rs:6:57 + | +LL | fn create_complex_future() -> impl Future { + | ^^^^^^^^^^^ + +error[E0733]: recursion in an async block requires boxing + --> $DIR/ice-issue-146191.rs:8:5 + | +LL | async { create_complex_future().await } + | ^^^^^ ----------------------------- recursive call here + | + = note: a recursive `async fn` call must introduce indirection such as `Box::pin` to avoid an infinitely sized future + +error: aborting due to 2 previous errors + +Some errors have detailed explanations: E0277, E0733. +For more information about an error, try `rustc --explain E0277`. diff --git a/tests/ui/impl-trait/non-defining-uses/ice-issue-146191.next.stderr b/tests/ui/impl-trait/non-defining-uses/ice-issue-146191.next.stderr new file mode 100644 index 000000000000..e8b551c65fc0 --- /dev/null +++ b/tests/ui/impl-trait/non-defining-uses/ice-issue-146191.next.stderr @@ -0,0 +1,17 @@ +error[E0282]: type annotations needed + --> $DIR/ice-issue-146191.rs:8:5 + | +LL | async { create_complex_future().await } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type + +error[E0282]: type annotations needed + --> $DIR/ice-issue-146191.rs:8:5 + | +LL | async { create_complex_future().await } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type + | + = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` + +error: aborting due to 2 previous errors + +For more information about this error, try `rustc --explain E0282`. diff --git a/tests/ui/impl-trait/non-defining-uses/ice-issue-146191.rs b/tests/ui/impl-trait/non-defining-uses/ice-issue-146191.rs new file mode 100644 index 000000000000..356f7d01eb9b --- /dev/null +++ b/tests/ui/impl-trait/non-defining-uses/ice-issue-146191.rs @@ -0,0 +1,15 @@ +//@ edition: 2024 +//@ revisions: current next +//@[next] compile-flags: -Znext-solver +//@ ignore-compare-mode-next-solver (explicit revisions) + +fn create_complex_future() -> impl Future { + //[current]~^ ERROR the trait bound `(): ReturnsSend` is not satisfied + async { create_complex_future().await } + //[current]~^ ERROR recursion in an async block requires + //[next]~^^ ERROR type annotations needed + //[next]~| ERROR type annotations needed +} + +trait ReturnsSend {} +fn main() {} diff --git a/tests/ui/lint/improper_ctypes/allow-phantomdata-in-ffi.rs b/tests/ui/lint/improper-ctypes/allow-phantomdata-in-ffi.rs similarity index 100% rename from tests/ui/lint/improper_ctypes/allow-phantomdata-in-ffi.rs rename to tests/ui/lint/improper-ctypes/allow-phantomdata-in-ffi.rs diff --git a/tests/ui/lint/lint-ctypes-113436-1.rs b/tests/ui/lint/improper-ctypes/lint-113436-1.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-113436-1.rs rename to tests/ui/lint/improper-ctypes/lint-113436-1.rs diff --git a/tests/ui/lint/lint-ctypes-113436-1.stderr b/tests/ui/lint/improper-ctypes/lint-113436-1.stderr similarity index 82% rename from tests/ui/lint/lint-ctypes-113436-1.stderr rename to tests/ui/lint/improper-ctypes/lint-113436-1.stderr index 7b63043f0575..f01dc3b6e0d1 100644 --- a/tests/ui/lint/lint-ctypes-113436-1.stderr +++ b/tests/ui/lint/improper-ctypes/lint-113436-1.stderr @@ -1,5 +1,5 @@ error: `extern` fn uses type `NotSafe`, which is not FFI-safe - --> $DIR/lint-ctypes-113436-1.rs:22:22 + --> $DIR/lint-113436-1.rs:22:22 | LL | extern "C" fn bar(x: Bar) -> Bar { | ^^^ not FFI-safe @@ -7,18 +7,18 @@ LL | extern "C" fn bar(x: Bar) -> Bar { = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct = note: this struct has unspecified layout note: the type is defined here - --> $DIR/lint-ctypes-113436-1.rs:13:1 + --> $DIR/lint-113436-1.rs:13:1 | LL | struct NotSafe(u32); | ^^^^^^^^^^^^^^ note: the lint level is defined here - --> $DIR/lint-ctypes-113436-1.rs:1:9 + --> $DIR/lint-113436-1.rs:1:9 | LL | #![deny(improper_ctypes_definitions)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: `extern` fn uses type `NotSafe`, which is not FFI-safe - --> $DIR/lint-ctypes-113436-1.rs:22:30 + --> $DIR/lint-113436-1.rs:22:30 | LL | extern "C" fn bar(x: Bar) -> Bar { | ^^^ not FFI-safe @@ -26,7 +26,7 @@ LL | extern "C" fn bar(x: Bar) -> Bar { = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct = note: this struct has unspecified layout note: the type is defined here - --> $DIR/lint-ctypes-113436-1.rs:13:1 + --> $DIR/lint-113436-1.rs:13:1 | LL | struct NotSafe(u32); | ^^^^^^^^^^^^^^ diff --git a/tests/ui/lint/lint-ctypes-73249-2.rs b/tests/ui/lint/improper-ctypes/lint-73249-2.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-73249-2.rs rename to tests/ui/lint/improper-ctypes/lint-73249-2.rs diff --git a/tests/ui/lint/lint-ctypes-73249-2.stderr b/tests/ui/lint/improper-ctypes/lint-73249-2.stderr similarity index 81% rename from tests/ui/lint/lint-ctypes-73249-2.stderr rename to tests/ui/lint/improper-ctypes/lint-73249-2.stderr index 2d0dfe94f097..d6c1cec2bd6c 100644 --- a/tests/ui/lint/lint-ctypes-73249-2.stderr +++ b/tests/ui/lint/improper-ctypes/lint-73249-2.stderr @@ -1,12 +1,12 @@ error: `extern` block uses type `Qux`, which is not FFI-safe - --> $DIR/lint-ctypes-73249-2.rs:27:21 + --> $DIR/lint-73249-2.rs:27:21 | LL | fn lint_me() -> A<()>; | ^^^^^ not FFI-safe | = note: opaque types have no C equivalent note: the lint level is defined here - --> $DIR/lint-ctypes-73249-2.rs:2:9 + --> $DIR/lint-73249-2.rs:2:9 | LL | #![deny(improper_ctypes)] | ^^^^^^^^^^^^^^^ diff --git a/tests/ui/lint/lint-ctypes-73249-3.rs b/tests/ui/lint/improper-ctypes/lint-73249-3.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-73249-3.rs rename to tests/ui/lint/improper-ctypes/lint-73249-3.rs diff --git a/tests/ui/lint/lint-ctypes-73249-3.stderr b/tests/ui/lint/improper-ctypes/lint-73249-3.stderr similarity index 81% rename from tests/ui/lint/lint-ctypes-73249-3.stderr rename to tests/ui/lint/improper-ctypes/lint-73249-3.stderr index e1a313a29065..ebc9eb5eb827 100644 --- a/tests/ui/lint/lint-ctypes-73249-3.stderr +++ b/tests/ui/lint/improper-ctypes/lint-73249-3.stderr @@ -1,12 +1,12 @@ error: `extern` block uses type `Qux`, which is not FFI-safe - --> $DIR/lint-ctypes-73249-3.rs:21:25 + --> $DIR/lint-73249-3.rs:21:25 | LL | pub fn lint_me() -> A; | ^ not FFI-safe | = note: opaque types have no C equivalent note: the lint level is defined here - --> $DIR/lint-ctypes-73249-3.rs:2:9 + --> $DIR/lint-73249-3.rs:2:9 | LL | #![deny(improper_ctypes)] | ^^^^^^^^^^^^^^^ diff --git a/tests/ui/lint/lint-ctypes-73249-5.rs b/tests/ui/lint/improper-ctypes/lint-73249-5.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-73249-5.rs rename to tests/ui/lint/improper-ctypes/lint-73249-5.rs diff --git a/tests/ui/lint/lint-ctypes-73249-5.stderr b/tests/ui/lint/improper-ctypes/lint-73249-5.stderr similarity index 81% rename from tests/ui/lint/lint-ctypes-73249-5.stderr rename to tests/ui/lint/improper-ctypes/lint-73249-5.stderr index c4fa955de05e..484927f57fea 100644 --- a/tests/ui/lint/lint-ctypes-73249-5.stderr +++ b/tests/ui/lint/improper-ctypes/lint-73249-5.stderr @@ -1,12 +1,12 @@ error: `extern` block uses type `Qux`, which is not FFI-safe - --> $DIR/lint-ctypes-73249-5.rs:21:25 + --> $DIR/lint-73249-5.rs:21:25 | LL | pub fn lint_me() -> A; | ^ not FFI-safe | = note: opaque types have no C equivalent note: the lint level is defined here - --> $DIR/lint-ctypes-73249-5.rs:2:9 + --> $DIR/lint-73249-5.rs:2:9 | LL | #![deny(improper_ctypes)] | ^^^^^^^^^^^^^^^ diff --git a/tests/ui/lint/lint-ctypes-73251-1.rs b/tests/ui/lint/improper-ctypes/lint-73251-1.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-73251-1.rs rename to tests/ui/lint/improper-ctypes/lint-73251-1.rs diff --git a/tests/ui/lint/lint-ctypes-73251-1.stderr b/tests/ui/lint/improper-ctypes/lint-73251-1.stderr similarity index 82% rename from tests/ui/lint/lint-ctypes-73251-1.stderr rename to tests/ui/lint/improper-ctypes/lint-73251-1.stderr index 675a9de51cd0..749722f0e220 100644 --- a/tests/ui/lint/lint-ctypes-73251-1.stderr +++ b/tests/ui/lint/improper-ctypes/lint-73251-1.stderr @@ -1,12 +1,12 @@ error: `extern` block uses type `Qux`, which is not FFI-safe - --> $DIR/lint-ctypes-73251-1.rs:24:21 + --> $DIR/lint-73251-1.rs:24:21 | LL | fn lint_me() -> ::Assoc; | ^^^^^^^^^^^^^^^^^^^ not FFI-safe | = note: opaque types have no C equivalent note: the lint level is defined here - --> $DIR/lint-ctypes-73251-1.rs:2:9 + --> $DIR/lint-73251-1.rs:2:9 | LL | #![deny(improper_ctypes)] | ^^^^^^^^^^^^^^^ diff --git a/tests/ui/lint/lint-ctypes-73251-2.rs b/tests/ui/lint/improper-ctypes/lint-73251-2.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-73251-2.rs rename to tests/ui/lint/improper-ctypes/lint-73251-2.rs diff --git a/tests/ui/lint/lint-ctypes-73251-2.stderr b/tests/ui/lint/improper-ctypes/lint-73251-2.stderr similarity index 82% rename from tests/ui/lint/lint-ctypes-73251-2.stderr rename to tests/ui/lint/improper-ctypes/lint-73251-2.stderr index 634950b29ed4..3770b7d789f6 100644 --- a/tests/ui/lint/lint-ctypes-73251-2.stderr +++ b/tests/ui/lint/improper-ctypes/lint-73251-2.stderr @@ -1,12 +1,12 @@ error: `extern` block uses type `AliasA`, which is not FFI-safe - --> $DIR/lint-ctypes-73251-2.rs:38:21 + --> $DIR/lint-73251-2.rs:38:21 | LL | fn lint_me() -> ::Assoc; | ^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe | = note: opaque types have no C equivalent note: the lint level is defined here - --> $DIR/lint-ctypes-73251-2.rs:2:9 + --> $DIR/lint-73251-2.rs:2:9 | LL | #![deny(improper_ctypes)] | ^^^^^^^^^^^^^^^ diff --git a/tests/ui/lint/lint-ctypes-94223.rs b/tests/ui/lint/improper-ctypes/lint-94223.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-94223.rs rename to tests/ui/lint/improper-ctypes/lint-94223.rs diff --git a/tests/ui/lint/lint-ctypes-94223.stderr b/tests/ui/lint/improper-ctypes/lint-94223.stderr similarity index 86% rename from tests/ui/lint/lint-ctypes-94223.stderr rename to tests/ui/lint/improper-ctypes/lint-94223.stderr index bd127cf60044..008debf8f010 100644 --- a/tests/ui/lint/lint-ctypes-94223.stderr +++ b/tests/ui/lint/improper-ctypes/lint-94223.stderr @@ -1,5 +1,5 @@ error: `extern` fn uses type `[u8]`, which is not FFI-safe - --> $DIR/lint-ctypes-94223.rs:4:15 + --> $DIR/lint-94223.rs:4:15 | LL | pub fn bad(f: extern "C" fn([u8])) {} | ^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -7,13 +7,13 @@ LL | pub fn bad(f: extern "C" fn([u8])) {} = help: consider using a raw pointer instead = note: slices have no C equivalent note: the lint level is defined here - --> $DIR/lint-ctypes-94223.rs:2:9 + --> $DIR/lint-94223.rs:2:9 | LL | #![deny(improper_ctypes_definitions)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: `extern` fn uses type `[u8]`, which is not FFI-safe - --> $DIR/lint-ctypes-94223.rs:7:28 + --> $DIR/lint-94223.rs:7:28 | LL | pub fn bad_twice(f: Result) {} | ^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -22,7 +22,7 @@ LL | pub fn bad_twice(f: Result) {} = note: slices have no C equivalent error: `extern` fn uses type `[u8]`, which is not FFI-safe - --> $DIR/lint-ctypes-94223.rs:7:49 + --> $DIR/lint-94223.rs:7:49 | LL | pub fn bad_twice(f: Result) {} | ^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -31,7 +31,7 @@ LL | pub fn bad_twice(f: Result) {} = note: slices have no C equivalent error: `extern` fn uses type `[u8]`, which is not FFI-safe - --> $DIR/lint-ctypes-94223.rs:11:18 + --> $DIR/lint-94223.rs:11:18 | LL | struct BadStruct(extern "C" fn([u8])); | ^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -40,7 +40,7 @@ LL | struct BadStruct(extern "C" fn([u8])); = note: slices have no C equivalent error: `extern` fn uses type `[u8]`, which is not FFI-safe - --> $DIR/lint-ctypes-94223.rs:15:7 + --> $DIR/lint-94223.rs:15:7 | LL | A(extern "C" fn([u8])), | ^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -49,7 +49,7 @@ LL | A(extern "C" fn([u8])), = note: slices have no C equivalent error: `extern` fn uses type `[u8]`, which is not FFI-safe - --> $DIR/lint-ctypes-94223.rs:20:7 + --> $DIR/lint-94223.rs:20:7 | LL | A(extern "C" fn([u8])), | ^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -58,7 +58,7 @@ LL | A(extern "C" fn([u8])), = note: slices have no C equivalent error: `extern` fn uses type `[u8]`, which is not FFI-safe - --> $DIR/lint-ctypes-94223.rs:24:12 + --> $DIR/lint-94223.rs:24:12 | LL | type Foo = extern "C" fn([u8]); | ^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -67,7 +67,7 @@ LL | type Foo = extern "C" fn([u8]); = note: slices have no C equivalent error: `extern` fn uses type `Option<&::FooType>`, which is not FFI-safe - --> $DIR/lint-ctypes-94223.rs:31:20 + --> $DIR/lint-94223.rs:31:20 | LL | pub type Foo2 = extern "C" fn(Option<&::FooType>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -76,7 +76,7 @@ LL | pub type Foo2 = extern "C" fn(Option<&::FooType>); = note: enum has no representation hint error: `extern` fn uses type `FfiUnsafe`, which is not FFI-safe - --> $DIR/lint-ctypes-94223.rs:41:17 + --> $DIR/lint-94223.rs:41:17 | LL | pub static BAD: extern "C" fn(FfiUnsafe) = f; | ^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -84,13 +84,13 @@ LL | pub static BAD: extern "C" fn(FfiUnsafe) = f; = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct = note: this struct has unspecified layout note: the type is defined here - --> $DIR/lint-ctypes-94223.rs:34:1 + --> $DIR/lint-94223.rs:34:1 | LL | pub struct FfiUnsafe; | ^^^^^^^^^^^^^^^^^^^^ error: `extern` fn uses type `FfiUnsafe`, which is not FFI-safe - --> $DIR/lint-ctypes-94223.rs:44:30 + --> $DIR/lint-94223.rs:44:30 | LL | pub static BAD_TWICE: Result = Ok(f); | ^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -98,13 +98,13 @@ LL | pub static BAD_TWICE: Result $DIR/lint-ctypes-94223.rs:34:1 + --> $DIR/lint-94223.rs:34:1 | LL | pub struct FfiUnsafe; | ^^^^^^^^^^^^^^^^^^^^ error: `extern` fn uses type `FfiUnsafe`, which is not FFI-safe - --> $DIR/lint-ctypes-94223.rs:44:56 + --> $DIR/lint-94223.rs:44:56 | LL | pub static BAD_TWICE: Result = Ok(f); | ^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -112,13 +112,13 @@ LL | pub static BAD_TWICE: Result $DIR/lint-ctypes-94223.rs:34:1 + --> $DIR/lint-94223.rs:34:1 | LL | pub struct FfiUnsafe; | ^^^^^^^^^^^^^^^^^^^^ error: `extern` fn uses type `FfiUnsafe`, which is not FFI-safe - --> $DIR/lint-ctypes-94223.rs:48:22 + --> $DIR/lint-94223.rs:48:22 | LL | pub const BAD_CONST: extern "C" fn(FfiUnsafe) = f; | ^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -126,7 +126,7 @@ LL | pub const BAD_CONST: extern "C" fn(FfiUnsafe) = f; = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct = note: this struct has unspecified layout note: the type is defined here - --> $DIR/lint-ctypes-94223.rs:34:1 + --> $DIR/lint-94223.rs:34:1 | LL | pub struct FfiUnsafe; | ^^^^^^^^^^^^^^^^^^^^ diff --git a/tests/ui/lint/lint-ctypes-cstr.rs b/tests/ui/lint/improper-ctypes/lint-cstr.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-cstr.rs rename to tests/ui/lint/improper-ctypes/lint-cstr.rs diff --git a/tests/ui/lint/lint-ctypes-cstr.stderr b/tests/ui/lint/improper-ctypes/lint-cstr.stderr similarity index 88% rename from tests/ui/lint/lint-ctypes-cstr.stderr rename to tests/ui/lint/improper-ctypes/lint-cstr.stderr index 8957758d5773..da2630658431 100644 --- a/tests/ui/lint/lint-ctypes-cstr.stderr +++ b/tests/ui/lint/improper-ctypes/lint-cstr.stderr @@ -1,5 +1,5 @@ error: `extern` block uses type `CStr`, which is not FFI-safe - --> $DIR/lint-ctypes-cstr.rs:7:21 + --> $DIR/lint-cstr.rs:7:21 | LL | fn take_cstr(s: CStr); | ^^^^ not FFI-safe @@ -7,13 +7,13 @@ LL | fn take_cstr(s: CStr); = help: consider passing a `*const std::ffi::c_char` instead, and use `CStr::as_ptr()` = note: `CStr`/`CString` do not have a guaranteed layout note: the lint level is defined here - --> $DIR/lint-ctypes-cstr.rs:2:9 + --> $DIR/lint-cstr.rs:2:9 | LL | #![deny(improper_ctypes, improper_ctypes_definitions)] | ^^^^^^^^^^^^^^^ error: `extern` block uses type `CStr`, which is not FFI-safe - --> $DIR/lint-ctypes-cstr.rs:10:25 + --> $DIR/lint-cstr.rs:10:25 | LL | fn take_cstr_ref(s: &CStr); | ^^^^^ not FFI-safe @@ -22,7 +22,7 @@ LL | fn take_cstr_ref(s: &CStr); = note: `CStr`/`CString` do not have a guaranteed layout error: `extern` block uses type `CString`, which is not FFI-safe - --> $DIR/lint-ctypes-cstr.rs:13:24 + --> $DIR/lint-cstr.rs:13:24 | LL | fn take_cstring(s: CString); | ^^^^^^^ not FFI-safe @@ -31,7 +31,7 @@ LL | fn take_cstring(s: CString); = note: `CStr`/`CString` do not have a guaranteed layout error: `extern` block uses type `CString`, which is not FFI-safe - --> $DIR/lint-ctypes-cstr.rs:16:28 + --> $DIR/lint-cstr.rs:16:28 | LL | fn take_cstring_ref(s: &CString); | ^^^^^^^^ not FFI-safe @@ -40,7 +40,7 @@ LL | fn take_cstring_ref(s: &CString); = note: `CStr`/`CString` do not have a guaranteed layout error: `extern` block uses type `CString`, which is not FFI-safe - --> $DIR/lint-ctypes-cstr.rs:20:43 + --> $DIR/lint-cstr.rs:20:43 | LL | fn no_special_help_for_mut_cstring(s: *mut CString); | ^^^^^^^^^^^^ not FFI-safe @@ -49,7 +49,7 @@ LL | fn no_special_help_for_mut_cstring(s: *mut CString); = note: this struct has unspecified layout error: `extern` block uses type `CString`, which is not FFI-safe - --> $DIR/lint-ctypes-cstr.rs:24:47 + --> $DIR/lint-cstr.rs:24:47 | LL | fn no_special_help_for_mut_cstring_ref(s: &mut CString); | ^^^^^^^^^^^^ not FFI-safe @@ -58,7 +58,7 @@ LL | fn no_special_help_for_mut_cstring_ref(s: &mut CString); = note: this struct has unspecified layout error: `extern` fn uses type `CStr`, which is not FFI-safe - --> $DIR/lint-ctypes-cstr.rs:29:37 + --> $DIR/lint-cstr.rs:29:37 | LL | extern "C" fn rust_take_cstr_ref(s: &CStr) {} | ^^^^^ not FFI-safe @@ -66,13 +66,13 @@ LL | extern "C" fn rust_take_cstr_ref(s: &CStr) {} = help: consider passing a `*const std::ffi::c_char` instead, and use `CStr::as_ptr()` = note: `CStr`/`CString` do not have a guaranteed layout note: the lint level is defined here - --> $DIR/lint-ctypes-cstr.rs:2:26 + --> $DIR/lint-cstr.rs:2:26 | LL | #![deny(improper_ctypes, improper_ctypes_definitions)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: `extern` fn uses type `CString`, which is not FFI-safe - --> $DIR/lint-ctypes-cstr.rs:32:36 + --> $DIR/lint-cstr.rs:32:36 | LL | extern "C" fn rust_take_cstring(s: CString) {} | ^^^^^^^ not FFI-safe diff --git a/tests/ui/lint/lint-ctypes.rs b/tests/ui/lint/improper-ctypes/lint-ctypes.rs similarity index 98% rename from tests/ui/lint/lint-ctypes.rs rename to tests/ui/lint/improper-ctypes/lint-ctypes.rs index 47586c826ab8..7dc06079fa32 100644 --- a/tests/ui/lint/lint-ctypes.rs +++ b/tests/ui/lint/improper-ctypes/lint-ctypes.rs @@ -52,7 +52,6 @@ extern "C" { pub fn str_type(p: &str); //~ ERROR: uses type `str` pub fn box_type(p: Box); //~ ERROR uses type `Box` pub fn opt_box_type(p: Option>); - //~^ ERROR uses type `Option>` pub fn char_type(p: char); //~ ERROR uses type `char` pub fn trait_type(p: &dyn Bar); //~ ERROR uses type `dyn Bar` pub fn tuple_type(p: (i32, i32)); //~ ERROR uses type `(i32, i32)` diff --git a/tests/ui/lint/lint-ctypes.stderr b/tests/ui/lint/improper-ctypes/lint-ctypes.stderr similarity index 88% rename from tests/ui/lint/lint-ctypes.stderr rename to tests/ui/lint/improper-ctypes/lint-ctypes.stderr index 3fb36647d4f1..6f8b951c53d7 100644 --- a/tests/ui/lint/lint-ctypes.stderr +++ b/tests/ui/lint/improper-ctypes/lint-ctypes.stderr @@ -67,17 +67,8 @@ LL | pub fn box_type(p: Box); = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct = note: this struct has unspecified layout -error: `extern` block uses type `Option>`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:54:28 - | -LL | pub fn opt_box_type(p: Option>); - | ^^^^^^^^^^^^^^^^ not FFI-safe - | - = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum - = note: enum has no representation hint - error: `extern` block uses type `char`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:56:25 + --> $DIR/lint-ctypes.rs:55:25 | LL | pub fn char_type(p: char); | ^^^^ not FFI-safe @@ -86,7 +77,7 @@ LL | pub fn char_type(p: char); = note: the `char` type has no C equivalent error: `extern` block uses type `dyn Bar`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:57:26 + --> $DIR/lint-ctypes.rs:56:26 | LL | pub fn trait_type(p: &dyn Bar); | ^^^^^^^^ not FFI-safe @@ -94,7 +85,7 @@ LL | pub fn trait_type(p: &dyn Bar); = note: trait objects have no C equivalent error: `extern` block uses type `(i32, i32)`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:58:26 + --> $DIR/lint-ctypes.rs:57:26 | LL | pub fn tuple_type(p: (i32, i32)); | ^^^^^^^^^^ not FFI-safe @@ -103,7 +94,7 @@ LL | pub fn tuple_type(p: (i32, i32)); = note: tuples have unspecified layout error: `extern` block uses type `(i32, i32)`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:59:27 + --> $DIR/lint-ctypes.rs:58:27 | LL | pub fn tuple_type2(p: I32Pair); | ^^^^^^^ not FFI-safe @@ -112,7 +103,7 @@ LL | pub fn tuple_type2(p: I32Pair); = note: tuples have unspecified layout error: `extern` block uses type `ZeroSize`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:60:25 + --> $DIR/lint-ctypes.rs:59:25 | LL | pub fn zero_size(p: ZeroSize); | ^^^^^^^^ not FFI-safe @@ -126,7 +117,7 @@ LL | pub struct ZeroSize; | ^^^^^^^^^^^^^^^^^^^ error: `extern` block uses type `ZeroSizeWithPhantomData`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:61:33 + --> $DIR/lint-ctypes.rs:60:33 | LL | pub fn zero_size_phantom(p: ZeroSizeWithPhantomData); | ^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -139,7 +130,7 @@ LL | pub struct ZeroSizeWithPhantomData(::std::marker::PhantomData); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: `extern` block uses type `PhantomData`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:64:12 + --> $DIR/lint-ctypes.rs:63:12 | LL | -> ::std::marker::PhantomData; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -147,7 +138,7 @@ LL | -> ::std::marker::PhantomData; = note: composed only of `PhantomData` error: `extern` block uses type `fn()`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:65:23 + --> $DIR/lint-ctypes.rs:64:23 | LL | pub fn fn_type(p: RustFn); | ^^^^^^ not FFI-safe @@ -156,7 +147,7 @@ LL | pub fn fn_type(p: RustFn); = note: this function pointer has Rust-specific calling convention error: `extern` block uses type `fn()`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:66:24 + --> $DIR/lint-ctypes.rs:65:24 | LL | pub fn fn_type2(p: fn()); | ^^^^ not FFI-safe @@ -165,7 +156,7 @@ LL | pub fn fn_type2(p: fn()); = note: this function pointer has Rust-specific calling convention error: `extern` block uses type `Box`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:67:28 + --> $DIR/lint-ctypes.rs:66:28 | LL | pub fn fn_contained(p: RustBadRet); | ^^^^^^^^^^ not FFI-safe @@ -174,7 +165,7 @@ LL | pub fn fn_contained(p: RustBadRet); = note: this struct has unspecified layout error: `extern` block uses type `str`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:68:31 + --> $DIR/lint-ctypes.rs:67:31 | LL | pub fn transparent_str(p: TransparentStr); | ^^^^^^^^^^^^^^ not FFI-safe @@ -183,7 +174,7 @@ LL | pub fn transparent_str(p: TransparentStr); = note: string slices have no C equivalent error: `extern` block uses type `Box`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:69:30 + --> $DIR/lint-ctypes.rs:68:30 | LL | pub fn transparent_fn(p: TransparentBadFn); | ^^^^^^^^^^^^^^^^ not FFI-safe @@ -192,7 +183,7 @@ LL | pub fn transparent_fn(p: TransparentBadFn); = note: this struct has unspecified layout error: `extern` block uses type `[u8; 8]`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:70:27 + --> $DIR/lint-ctypes.rs:69:27 | LL | pub fn raw_array(arr: [u8; 8]); | ^^^^^^^ not FFI-safe @@ -201,7 +192,7 @@ LL | pub fn raw_array(arr: [u8; 8]); = note: passing raw arrays by value is not FFI-safe error: `extern` block uses type `Option>`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:72:26 + --> $DIR/lint-ctypes.rs:71:26 | LL | pub fn no_niche_a(a: Option>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -210,7 +201,7 @@ LL | pub fn no_niche_a(a: Option>); = note: enum has no representation hint error: `extern` block uses type `Option>`, which is not FFI-safe - --> $DIR/lint-ctypes.rs:74:26 + --> $DIR/lint-ctypes.rs:73:26 | LL | pub fn no_niche_b(b: Option>); | ^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -218,5 +209,5 @@ LL | pub fn no_niche_b(b: Option>); = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum = note: enum has no representation hint -error: aborting due to 22 previous errors +error: aborting due to 21 previous errors diff --git a/tests/ui/lint/lint-ctypes-enum.rs b/tests/ui/lint/improper-ctypes/lint-enum.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-enum.rs rename to tests/ui/lint/improper-ctypes/lint-enum.rs diff --git a/tests/ui/lint/lint-ctypes-enum.stderr b/tests/ui/lint/improper-ctypes/lint-enum.stderr similarity index 90% rename from tests/ui/lint/lint-ctypes-enum.stderr rename to tests/ui/lint/improper-ctypes/lint-enum.stderr index 40d22723309f..35d1dcb87fd8 100644 --- a/tests/ui/lint/lint-ctypes-enum.stderr +++ b/tests/ui/lint/improper-ctypes/lint-enum.stderr @@ -1,5 +1,5 @@ error: `extern` block uses type `U`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:82:14 + --> $DIR/lint-enum.rs:82:14 | LL | fn uf(x: U); | ^ not FFI-safe @@ -7,18 +7,18 @@ LL | fn uf(x: U); = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum = note: enum has no representation hint note: the type is defined here - --> $DIR/lint-ctypes-enum.rs:9:1 + --> $DIR/lint-enum.rs:9:1 | LL | enum U { | ^^^^^^ note: the lint level is defined here - --> $DIR/lint-ctypes-enum.rs:2:9 + --> $DIR/lint-enum.rs:2:9 | LL | #![deny(improper_ctypes)] | ^^^^^^^^^^^^^^^ error: `extern` block uses type `B`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:83:14 + --> $DIR/lint-enum.rs:83:14 | LL | fn bf(x: B); | ^ not FFI-safe @@ -26,13 +26,13 @@ LL | fn bf(x: B); = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum = note: enum has no representation hint note: the type is defined here - --> $DIR/lint-ctypes-enum.rs:12:1 + --> $DIR/lint-enum.rs:12:1 | LL | enum B { | ^^^^^^ error: `extern` block uses type `T`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:84:14 + --> $DIR/lint-enum.rs:84:14 | LL | fn tf(x: T); | ^ not FFI-safe @@ -40,13 +40,13 @@ LL | fn tf(x: T); = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum = note: enum has no representation hint note: the type is defined here - --> $DIR/lint-ctypes-enum.rs:16:1 + --> $DIR/lint-enum.rs:16:1 | LL | enum T { | ^^^^^^ error: `extern` block uses type `Option>>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:108:36 + --> $DIR/lint-enum.rs:108:36 | LL | fn option_transparent_union(x: Option>>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -55,7 +55,7 @@ LL | fn option_transparent_union(x: Option = note: enum has no representation hint error: `extern` block uses type `Option>>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:110:28 + --> $DIR/lint-enum.rs:110:28 | LL | fn option_repr_rust(x: Option>>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -64,7 +64,7 @@ LL | fn option_repr_rust(x: Option>>); = note: enum has no representation hint error: `extern` block uses type `Option`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:111:21 + --> $DIR/lint-enum.rs:111:21 | LL | fn option_u8(x: Option); | ^^^^^^^^^^ not FFI-safe @@ -73,7 +73,7 @@ LL | fn option_u8(x: Option); = note: enum has no representation hint error: `extern` block uses type `Result>, ()>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:131:38 + --> $DIR/lint-enum.rs:131:38 | LL | fn result_transparent_union_t(x: Result>, ()>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -82,7 +82,7 @@ LL | fn result_transparent_union_t(x: Result>, ()>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:133:30 + --> $DIR/lint-enum.rs:133:30 | LL | fn result_repr_rust_t(x: Result>, ()>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -91,7 +91,7 @@ LL | fn result_repr_rust_t(x: Result>, ()>); = note: enum has no representation hint error: `extern` block uses type `Result, U>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:137:51 + --> $DIR/lint-enum.rs:137:51 | LL | fn result_1zst_exhaustive_single_variant_t(x: Result, U>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -100,7 +100,7 @@ LL | fn result_1zst_exhaustive_single_variant_t(x: Result, = note: enum has no representation hint error: `extern` block uses type `Result, B>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:139:53 + --> $DIR/lint-enum.rs:139:53 | LL | fn result_1zst_exhaustive_multiple_variant_t(x: Result, B>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -109,7 +109,7 @@ LL | fn result_1zst_exhaustive_multiple_variant_t(x: Result = note: enum has no representation hint error: `extern` block uses type `Result, NonExhaustive>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:141:51 + --> $DIR/lint-enum.rs:141:51 | LL | fn result_1zst_non_exhaustive_no_variant_t(x: Result, NonExhaustive>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -118,7 +118,7 @@ LL | fn result_1zst_non_exhaustive_no_variant_t(x: Result, = note: enum has no representation hint error: `extern` block uses type `Result, Field>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:144:49 + --> $DIR/lint-enum.rs:144:49 | LL | fn result_1zst_exhaustive_single_field_t(x: Result, Field>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -127,7 +127,7 @@ LL | fn result_1zst_exhaustive_single_field_t(x: Result, Fi = note: enum has no representation hint error: `extern` block uses type `Result>, ()>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:146:30 + --> $DIR/lint-enum.rs:146:30 | LL | fn result_cascading_t(x: Result>, ()>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -136,7 +136,7 @@ LL | fn result_cascading_t(x: Result>, ()>); = note: enum has no representation hint error: `extern` block uses type `Result<(), TransparentUnion>>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:167:38 + --> $DIR/lint-enum.rs:167:38 | LL | fn result_transparent_union_e(x: Result<(), TransparentUnion>>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -145,7 +145,7 @@ LL | fn result_transparent_union_e(x: Result<(), TransparentUnion>>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:169:30 + --> $DIR/lint-enum.rs:169:30 | LL | fn result_repr_rust_e(x: Result<(), Rust>>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -154,7 +154,7 @@ LL | fn result_repr_rust_e(x: Result<(), Rust>>); = note: enum has no representation hint error: `extern` block uses type `Result>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:173:51 + --> $DIR/lint-enum.rs:173:51 | LL | fn result_1zst_exhaustive_single_variant_e(x: Result>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -163,7 +163,7 @@ LL | fn result_1zst_exhaustive_single_variant_e(x: Result>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:175:53 + --> $DIR/lint-enum.rs:175:53 | LL | fn result_1zst_exhaustive_multiple_variant_e(x: Result>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -172,7 +172,7 @@ LL | fn result_1zst_exhaustive_multiple_variant_e(x: Result>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:177:51 + --> $DIR/lint-enum.rs:177:51 | LL | fn result_1zst_non_exhaustive_no_variant_e(x: Result>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -181,7 +181,7 @@ LL | fn result_1zst_non_exhaustive_no_variant_e(x: Result>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:180:49 + --> $DIR/lint-enum.rs:180:49 | LL | fn result_1zst_exhaustive_single_field_e(x: Result>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -190,7 +190,7 @@ LL | fn result_1zst_exhaustive_single_field_e(x: Result>>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:182:30 + --> $DIR/lint-enum.rs:182:30 | LL | fn result_cascading_e(x: Result<(), Result<(), num::NonZero>>); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -199,7 +199,7 @@ LL | fn result_cascading_e(x: Result<(), Result<(), num::NonZero>>); = note: enum has no representation hint error: `extern` block uses type `Result<(), ()>`, which is not FFI-safe - --> $DIR/lint-ctypes-enum.rs:184:27 + --> $DIR/lint-enum.rs:184:27 | LL | fn result_unit_t_e(x: Result<(), ()>); | ^^^^^^^^^^^^^^ not FFI-safe diff --git a/tests/ui/lint/lint-ctypes-fn.rs b/tests/ui/lint/improper-ctypes/lint-fn.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-fn.rs rename to tests/ui/lint/improper-ctypes/lint-fn.rs diff --git a/tests/ui/lint/lint-ctypes-fn.stderr b/tests/ui/lint/improper-ctypes/lint-fn.stderr similarity index 88% rename from tests/ui/lint/lint-ctypes-fn.stderr rename to tests/ui/lint/improper-ctypes/lint-fn.stderr index a19c04a63b56..34e3bd021b92 100644 --- a/tests/ui/lint/lint-ctypes-fn.stderr +++ b/tests/ui/lint/improper-ctypes/lint-fn.stderr @@ -1,5 +1,5 @@ error: `extern` fn uses type `[u32]`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:70:33 + --> $DIR/lint-fn.rs:70:33 | LL | pub extern "C" fn slice_type(p: &[u32]) { } | ^^^^^^ not FFI-safe @@ -7,13 +7,13 @@ LL | pub extern "C" fn slice_type(p: &[u32]) { } = help: consider using a raw pointer instead = note: slices have no C equivalent note: the lint level is defined here - --> $DIR/lint-ctypes-fn.rs:2:9 + --> $DIR/lint-fn.rs:2:9 | LL | #![deny(improper_ctypes_definitions)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: `extern` fn uses type `str`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:73:31 + --> $DIR/lint-fn.rs:73:31 | LL | pub extern "C" fn str_type(p: &str) { } | ^^^^ not FFI-safe @@ -22,7 +22,7 @@ LL | pub extern "C" fn str_type(p: &str) { } = note: string slices have no C equivalent error: `extern` fn uses type `Box<[u8]>`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:80:34 + --> $DIR/lint-fn.rs:80:34 | LL | pub extern "C" fn boxed_slice(p: Box<[u8]>) { } | ^^^^^^^^^ not FFI-safe @@ -30,7 +30,7 @@ LL | pub extern "C" fn boxed_slice(p: Box<[u8]>) { } = note: box cannot be represented as a single pointer error: `extern` fn uses type `Box`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:83:35 + --> $DIR/lint-fn.rs:83:35 | LL | pub extern "C" fn boxed_string(p: Box) { } | ^^^^^^^^ not FFI-safe @@ -38,7 +38,7 @@ LL | pub extern "C" fn boxed_string(p: Box) { } = note: box cannot be represented as a single pointer error: `extern` fn uses type `Box`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:86:34 + --> $DIR/lint-fn.rs:86:34 | LL | pub extern "C" fn boxed_trait(p: Box) { } | ^^^^^^^^^^^^^^ not FFI-safe @@ -46,7 +46,7 @@ LL | pub extern "C" fn boxed_trait(p: Box) { } = note: box cannot be represented as a single pointer error: `extern` fn uses type `char`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:89:32 + --> $DIR/lint-fn.rs:89:32 | LL | pub extern "C" fn char_type(p: char) { } | ^^^^ not FFI-safe @@ -55,7 +55,7 @@ LL | pub extern "C" fn char_type(p: char) { } = note: the `char` type has no C equivalent error: `extern` fn uses type `(i32, i32)`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:92:33 + --> $DIR/lint-fn.rs:92:33 | LL | pub extern "C" fn tuple_type(p: (i32, i32)) { } | ^^^^^^^^^^ not FFI-safe @@ -64,7 +64,7 @@ LL | pub extern "C" fn tuple_type(p: (i32, i32)) { } = note: tuples have unspecified layout error: `extern` fn uses type `(i32, i32)`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:95:34 + --> $DIR/lint-fn.rs:95:34 | LL | pub extern "C" fn tuple_type2(p: I32Pair) { } | ^^^^^^^ not FFI-safe @@ -73,7 +73,7 @@ LL | pub extern "C" fn tuple_type2(p: I32Pair) { } = note: tuples have unspecified layout error: `extern` fn uses type `ZeroSize`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:98:32 + --> $DIR/lint-fn.rs:98:32 | LL | pub extern "C" fn zero_size(p: ZeroSize) { } | ^^^^^^^^ not FFI-safe @@ -81,26 +81,26 @@ LL | pub extern "C" fn zero_size(p: ZeroSize) { } = help: consider adding a member to this struct = note: this struct has no fields note: the type is defined here - --> $DIR/lint-ctypes-fn.rs:25:1 + --> $DIR/lint-fn.rs:25:1 | LL | pub struct ZeroSize; | ^^^^^^^^^^^^^^^^^^^ error: `extern` fn uses type `ZeroSizeWithPhantomData`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:101:40 + --> $DIR/lint-fn.rs:101:40 | LL | pub extern "C" fn zero_size_phantom(p: ZeroSizeWithPhantomData) { } | ^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe | = note: composed only of `PhantomData` note: the type is defined here - --> $DIR/lint-ctypes-fn.rs:60:1 + --> $DIR/lint-fn.rs:60:1 | LL | pub struct ZeroSizeWithPhantomData(PhantomData); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: `extern` fn uses type `PhantomData`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:104:51 + --> $DIR/lint-fn.rs:104:51 | LL | pub extern "C" fn zero_size_phantom_toplevel() -> PhantomData { | ^^^^^^^^^^^^^^^^^ not FFI-safe @@ -108,7 +108,7 @@ LL | pub extern "C" fn zero_size_phantom_toplevel() -> PhantomData { = note: composed only of `PhantomData` error: `extern` fn uses type `fn()`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:109:30 + --> $DIR/lint-fn.rs:109:30 | LL | pub extern "C" fn fn_type(p: RustFn) { } | ^^^^^^ not FFI-safe @@ -117,7 +117,7 @@ LL | pub extern "C" fn fn_type(p: RustFn) { } = note: this function pointer has Rust-specific calling convention error: `extern` fn uses type `fn()`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:112:31 + --> $DIR/lint-fn.rs:112:31 | LL | pub extern "C" fn fn_type2(p: fn()) { } | ^^^^ not FFI-safe @@ -126,7 +126,7 @@ LL | pub extern "C" fn fn_type2(p: fn()) { } = note: this function pointer has Rust-specific calling convention error: `extern` fn uses type `str`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:117:38 + --> $DIR/lint-fn.rs:117:38 | LL | pub extern "C" fn transparent_str(p: TransparentStr) { } | ^^^^^^^^^^^^^^ not FFI-safe @@ -135,7 +135,7 @@ LL | pub extern "C" fn transparent_str(p: TransparentStr) { } = note: string slices have no C equivalent error: `extern` fn uses type `PhantomData`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:169:43 + --> $DIR/lint-fn.rs:169:43 | LL | pub extern "C" fn unused_generic2() -> PhantomData { | ^^^^^^^^^^^^^^^^^ not FFI-safe @@ -143,7 +143,7 @@ LL | pub extern "C" fn unused_generic2() -> PhantomData { = note: composed only of `PhantomData` error: `extern` fn uses type `Vec`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:182:39 + --> $DIR/lint-fn.rs:182:39 | LL | pub extern "C" fn used_generic4(x: Vec) { } | ^^^^^^ not FFI-safe @@ -152,7 +152,7 @@ LL | pub extern "C" fn used_generic4(x: Vec) { } = note: this struct has unspecified layout error: `extern` fn uses type `Vec`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:185:41 + --> $DIR/lint-fn.rs:185:41 | LL | pub extern "C" fn used_generic5() -> Vec { | ^^^^^^ not FFI-safe diff --git a/tests/ui/lint/lint-ctypes-non-recursion-limit.rs b/tests/ui/lint/improper-ctypes/lint-non-recursion-limit.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-non-recursion-limit.rs rename to tests/ui/lint/improper-ctypes/lint-non-recursion-limit.rs diff --git a/tests/ui/lint/lint-ctypes-option-nonnull-unsized.rs b/tests/ui/lint/improper-ctypes/lint-option-nonnull-unsized.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-option-nonnull-unsized.rs rename to tests/ui/lint/improper-ctypes/lint-option-nonnull-unsized.rs diff --git a/tests/ui/lint/lint-ctypes-option-nonnull-unsized.stderr b/tests/ui/lint/improper-ctypes/lint-option-nonnull-unsized.stderr similarity index 83% rename from tests/ui/lint/lint-ctypes-option-nonnull-unsized.stderr rename to tests/ui/lint/improper-ctypes/lint-option-nonnull-unsized.stderr index 746304694167..b17fb6bd6145 100644 --- a/tests/ui/lint/lint-ctypes-option-nonnull-unsized.stderr +++ b/tests/ui/lint/improper-ctypes/lint-option-nonnull-unsized.stderr @@ -1,5 +1,5 @@ error: `extern` fn uses type `Option<&T>`, which is not FFI-safe - --> $DIR/lint-ctypes-option-nonnull-unsized.rs:3:45 + --> $DIR/lint-option-nonnull-unsized.rs:3:45 | LL | extern "C" fn foo() -> Option<&'static T> { | ^^^^^^^^^^^^^^^^^^ not FFI-safe @@ -7,7 +7,7 @@ LL | extern "C" fn foo() -> Option<&'static T> { = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum = note: enum has no representation hint note: the lint level is defined here - --> $DIR/lint-ctypes-option-nonnull-unsized.rs:1:9 + --> $DIR/lint-option-nonnull-unsized.rs:1:9 | LL | #![deny(improper_ctypes_definitions)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ diff --git a/tests/ui/lint/lint-ctypes-113436.rs b/tests/ui/lint/improper-ctypes/mustpass-113436.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-113436.rs rename to tests/ui/lint/improper-ctypes/mustpass-113436.rs diff --git a/tests/ui/lint/lint-ctypes-113900.rs b/tests/ui/lint/improper-ctypes/mustpass-113900.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-113900.rs rename to tests/ui/lint/improper-ctypes/mustpass-113900.rs diff --git a/tests/ui/lint/improper_ctypes_definitions_ice_134060.rs b/tests/ui/lint/improper-ctypes/mustpass-134060.rs similarity index 100% rename from tests/ui/lint/improper_ctypes_definitions_ice_134060.rs rename to tests/ui/lint/improper-ctypes/mustpass-134060.rs diff --git a/tests/ui/lint/improper_ctypes_definitions_ice_134060.stderr b/tests/ui/lint/improper-ctypes/mustpass-134060.stderr similarity index 85% rename from tests/ui/lint/improper_ctypes_definitions_ice_134060.stderr rename to tests/ui/lint/improper-ctypes/mustpass-134060.stderr index f6ac9a92cd5f..791b2f737098 100644 --- a/tests/ui/lint/improper_ctypes_definitions_ice_134060.stderr +++ b/tests/ui/lint/improper-ctypes/mustpass-134060.stderr @@ -1,5 +1,5 @@ warning: `extern` fn uses type `()`, which is not FFI-safe - --> $DIR/improper_ctypes_definitions_ice_134060.rs:11:34 + --> $DIR/mustpass-134060.rs:11:34 | LL | extern "C" fn foo_(&self, _: ()) -> i64 { | ^^ not FFI-safe diff --git a/tests/ui/lint/lint-ctypes-66202.rs b/tests/ui/lint/improper-ctypes/mustpass-66202.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-66202.rs rename to tests/ui/lint/improper-ctypes/mustpass-66202.rs diff --git a/tests/ui/lint/lint-ctypes-73249-1.rs b/tests/ui/lint/improper-ctypes/mustpass-73249-1.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-73249-1.rs rename to tests/ui/lint/improper-ctypes/mustpass-73249-1.rs diff --git a/tests/ui/lint/lint-ctypes-73249-4.rs b/tests/ui/lint/improper-ctypes/mustpass-73249-4.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-73249-4.rs rename to tests/ui/lint/improper-ctypes/mustpass-73249-4.rs diff --git a/tests/ui/lint/lint-ctypes-73249.rs b/tests/ui/lint/improper-ctypes/mustpass-73249.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-73249.rs rename to tests/ui/lint/improper-ctypes/mustpass-73249.rs diff --git a/tests/ui/lint/lint-ctypes-73251.rs b/tests/ui/lint/improper-ctypes/mustpass-73251.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-73251.rs rename to tests/ui/lint/improper-ctypes/mustpass-73251.rs diff --git a/tests/ui/lint/lint-ctypes-73747.rs b/tests/ui/lint/improper-ctypes/mustpass-73747.rs similarity index 100% rename from tests/ui/lint/lint-ctypes-73747.rs rename to tests/ui/lint/improper-ctypes/mustpass-73747.rs diff --git a/tests/ui/lint/improper_ctypes/repr-rust-is-undefined.rs b/tests/ui/lint/improper-ctypes/repr-rust-is-undefined.rs similarity index 100% rename from tests/ui/lint/improper_ctypes/repr-rust-is-undefined.rs rename to tests/ui/lint/improper-ctypes/repr-rust-is-undefined.rs diff --git a/tests/ui/lint/improper_ctypes/repr-rust-is-undefined.stderr b/tests/ui/lint/improper-ctypes/repr-rust-is-undefined.stderr similarity index 100% rename from tests/ui/lint/improper_ctypes/repr-rust-is-undefined.stderr rename to tests/ui/lint/improper-ctypes/repr-rust-is-undefined.stderr diff --git a/tests/ui/lto/lto-global-allocator.rs b/tests/ui/lto/lto-global-allocator.rs new file mode 100644 index 000000000000..03f11709c901 --- /dev/null +++ b/tests/ui/lto/lto-global-allocator.rs @@ -0,0 +1,19 @@ +//@ compile-flags: --crate-type cdylib -C lto +//@ build-pass +//@ no-prefer-dynamic +//@ needs-crate-type: cdylib + +use std::alloc::{GlobalAlloc, Layout}; + +struct MyAllocator; + +unsafe impl GlobalAlloc for MyAllocator { + unsafe fn alloc(&self, _layout: Layout) -> *mut u8 { + todo!() + } + + unsafe fn dealloc(&self, _ptr: *mut u8, _layout: Layout) {} +} + +#[global_allocator] +static GLOBAL: MyAllocator = MyAllocator; diff --git a/tests/ui/parser/expr-as-stmt-2.rs b/tests/ui/parser/expr-as-stmt-2.rs index 3a18bdc3b730..4b1f62d8056d 100644 --- a/tests/ui/parser/expr-as-stmt-2.rs +++ b/tests/ui/parser/expr-as-stmt-2.rs @@ -7,4 +7,25 @@ fn foo(a: Option, b: Option) -> bool { if let Some(y) = a { true } else { false } } -fn main() {} +fn bar() -> bool { + false +} + +fn main() { + if true { true } else { false } && true; + //~^ ERROR mismatched types + //~| ERROR mismatched types + if true { true } else { false } && if true { true } else { false }; + //~^ ERROR mismatched types + //~| ERROR mismatched types + if true { true } else { false } if true { true } else { false }; + //~^ ERROR mismatched types + //~| ERROR mismatched types + if true { bar() } else { bar() } && if true { bar() } else { bar() }; + //~^ ERROR mismatched types + //~| ERROR mismatched types + if true { bar() } else { bar() } if true { bar() } else { bar() }; + //~^ ERROR mismatched types + //~| ERROR mismatched types + let _ = if true { true } else { false } && true; // ok +} diff --git a/tests/ui/parser/expr-as-stmt-2.stderr b/tests/ui/parser/expr-as-stmt-2.stderr index 2b6314c38ceb..f9838ee0299c 100644 --- a/tests/ui/parser/expr-as-stmt-2.stderr +++ b/tests/ui/parser/expr-as-stmt-2.stderr @@ -7,6 +7,10 @@ LL | if let Some(x) = a { true } else { false } | | expected `()`, found `bool` | expected this to be `()` | +help: parentheses are required to parse this as an expression + | +LL | (if let Some(x) = a { true } else { false }) + | + + help: you might have meant to return this value | LL | if let Some(x) = a { return true; } else { false } @@ -21,6 +25,10 @@ LL | if let Some(x) = a { true } else { false } | | expected `()`, found `bool` | expected this to be `()` | +help: parentheses are required to parse this as an expression + | +LL | (if let Some(x) = a { true } else { false }) + | + + help: you might have meant to return this value | LL | if let Some(x) = a { true } else { return false; } @@ -41,6 +49,152 @@ help: parentheses are required to parse this as an expression LL | (if let Some(x) = a { true } else { false }) | + + -error: aborting due to 3 previous errors +error[E0308]: mismatched types + --> $DIR/expr-as-stmt-2.rs:15:15 + | +LL | if true { true } else { false } && true; + | ----------^^^^----------------- + | | | + | | expected `()`, found `bool` + | expected this to be `()` + | +help: parentheses are required to parse this as an expression + | +LL | (if true { true } else { false }) && true; + | + + + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt-2.rs:15:29 + | +LL | if true { true } else { false } && true; + | ------------------------^^^^^-- + | | | + | | expected `()`, found `bool` + | expected this to be `()` + | +help: parentheses are required to parse this as an expression + | +LL | (if true { true } else { false }) && true; + | + + + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt-2.rs:18:15 + | +LL | if true { true } else { false } && if true { true } else { false }; + | ----------^^^^----------------- + | | | + | | expected `()`, found `bool` + | expected this to be `()` + | +help: parentheses are required to parse this as an expression + | +LL | (if true { true } else { false }) && if true { true } else { false }; + | + + + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt-2.rs:18:29 + | +LL | if true { true } else { false } && if true { true } else { false }; + | ------------------------^^^^^-- + | | | + | | expected `()`, found `bool` + | expected this to be `()` + | +help: parentheses are required to parse this as an expression + | +LL | (if true { true } else { false }) && if true { true } else { false }; + | + + + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt-2.rs:21:15 + | +LL | if true { true } else { false } if true { true } else { false }; + | ----------^^^^----------------- + | | | + | | expected `()`, found `bool` + | expected this to be `()` + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt-2.rs:21:29 + | +LL | if true { true } else { false } if true { true } else { false }; + | ------------------------^^^^^-- + | | | + | | expected `()`, found `bool` + | expected this to be `()` + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt-2.rs:24:15 + | +LL | if true { bar() } else { bar() } && if true { bar() } else { bar() }; + | ----------^^^^^----------------- + | | | + | | expected `()`, found `bool` + | expected this to be `()` + | +help: parentheses are required to parse this as an expression + | +LL | (if true { bar() } else { bar() }) && if true { bar() } else { bar() }; + | + + +help: consider using a semicolon here + | +LL | if true { bar() } else { bar() }; && if true { bar() } else { bar() }; + | + + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt-2.rs:24:30 + | +LL | if true { bar() } else { bar() } && if true { bar() } else { bar() }; + | -------------------------^^^^^-- + | | | + | | expected `()`, found `bool` + | expected this to be `()` + | +help: parentheses are required to parse this as an expression + | +LL | (if true { bar() } else { bar() }) && if true { bar() } else { bar() }; + | + + +help: consider using a semicolon here + | +LL | if true { bar() } else { bar() }; && if true { bar() } else { bar() }; + | + + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt-2.rs:27:15 + | +LL | if true { bar() } else { bar() } if true { bar() } else { bar() }; + | ----------^^^^^----------------- + | | | + | | expected `()`, found `bool` + | expected this to be `()` + | +help: consider using a semicolon here + | +LL | if true { bar(); } else { bar() } if true { bar() } else { bar() }; + | + +help: consider using a semicolon here + | +LL | if true { bar() } else { bar() }; if true { bar() } else { bar() }; + | + + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt-2.rs:27:30 + | +LL | if true { bar() } else { bar() } if true { bar() } else { bar() }; + | -------------------------^^^^^-- + | | | + | | expected `()`, found `bool` + | expected this to be `()` + | +help: consider using a semicolon here + | +LL | if true { bar() } else { bar(); } if true { bar() } else { bar() }; + | + +help: consider using a semicolon here + | +LL | if true { bar() } else { bar() }; if true { bar() } else { bar() }; + | + + +error: aborting due to 13 previous errors For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/parser/expr-as-stmt.fixed b/tests/ui/parser/expr-as-stmt.fixed index 0a4d62a4a0c8..bfae55047ed1 100644 --- a/tests/ui/parser/expr-as-stmt.fixed +++ b/tests/ui/parser/expr-as-stmt.fixed @@ -66,7 +66,7 @@ fn asteroids() -> impl FnOnce() -> bool { // https://github.com/rust-lang/rust/issues/105179 fn r#match() -> i32 { - (match () { () => 1 }) + match () { () => 1 } //~ ERROR expected expression, found `+` + ((match () { () => 1 })) + match () { () => 1 } //~ ERROR expected expression, found `+` //~^ ERROR mismatched types } @@ -76,4 +76,13 @@ fn r#unsafe() -> i32 { //~^ ERROR mismatched types } +// https://github.com/rust-lang/rust/issues/88727 +fn matches() -> bool { + (match () { _ => true }) && match () { _ => true }; //~ ERROR mismatched types + (match () { _ => true }) && match () { _ => true }; //~ ERROR mismatched types + //~^ ERROR expected `;`, found keyword `match` + (match () { _ => true }) && true; //~ ERROR mismatched types + ((match () { _ => true })) && true //~ ERROR mismatched types + //~^ ERROR mismatched types +} fn main() {} diff --git a/tests/ui/parser/expr-as-stmt.rs b/tests/ui/parser/expr-as-stmt.rs index 99c85e65baa5..94917432cb03 100644 --- a/tests/ui/parser/expr-as-stmt.rs +++ b/tests/ui/parser/expr-as-stmt.rs @@ -76,4 +76,13 @@ fn r#unsafe() -> i32 { //~^ ERROR mismatched types } +// https://github.com/rust-lang/rust/issues/88727 +fn matches() -> bool { + match () { _ => true } && match () { _ => true }; //~ ERROR mismatched types + match () { _ => true } && match () { _ => true } //~ ERROR mismatched types + //~^ ERROR expected `;`, found keyword `match` + match () { _ => true } && true; //~ ERROR mismatched types + match () { _ => true } && true //~ ERROR mismatched types + //~^ ERROR mismatched types +} fn main() {} diff --git a/tests/ui/parser/expr-as-stmt.stderr b/tests/ui/parser/expr-as-stmt.stderr index 577c3455a718..4681129babab 100644 --- a/tests/ui/parser/expr-as-stmt.stderr +++ b/tests/ui/parser/expr-as-stmt.stderr @@ -77,6 +77,15 @@ help: parentheses are required to parse this as an expression LL | (unsafe { 1 }) + unsafe { 1 } | + + +error: expected `;`, found keyword `match` + --> $DIR/expr-as-stmt.rs:82:53 + | +LL | match () { _ => true } && match () { _ => true } + | ^ help: add `;` here +LL | +LL | match () { _ => true } && true; + | ----- unexpected token + error[E0308]: mismatched types --> $DIR/expr-as-stmt.rs:64:7 | @@ -227,9 +236,12 @@ error[E0308]: mismatched types --> $DIR/expr-as-stmt.rs:69:5 | LL | match () { () => 1 } + match () { () => 1 } - | ^^^^^^^^^^^^^^^^^^^^- help: consider using a semicolon here - | | - | expected `()`, found integer + | ^^^^^^^^^^^^^^^^^^^^ expected `()`, found integer + | +help: parentheses are required to parse this as an expression + | +LL | (match () { () => 1 }) + match () { () => 1 } + | + + error[E0308]: mismatched types --> $DIR/expr-as-stmt.rs:75:14 @@ -242,7 +254,65 @@ help: you might have meant to return this value LL | unsafe { return 1; } + unsafe { 1 } | ++++++ + -error: aborting due to 22 previous errors +error[E0308]: mismatched types + --> $DIR/expr-as-stmt.rs:81:5 + | +LL | match () { _ => true } && match () { _ => true }; + | ^^^^^^^^^^^^^^^^^^^^^^ expected `()`, found `bool` + | +help: parentheses are required to parse this as an expression + | +LL | (match () { _ => true }) && match () { _ => true }; + | + + + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt.rs:82:5 + | +LL | match () { _ => true } && match () { _ => true } + | ^^^^^^^^^^^^^^^^^^^^^^ expected `()`, found `bool` + | +help: parentheses are required to parse this as an expression + | +LL | (match () { _ => true }) && match () { _ => true } + | + + + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt.rs:84:5 + | +LL | match () { _ => true } && true; + | ^^^^^^^^^^^^^^^^^^^^^^ expected `()`, found `bool` + | +help: parentheses are required to parse this as an expression + | +LL | (match () { _ => true }) && true; + | + + + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt.rs:85:5 + | +LL | match () { _ => true } && true + | ^^^^^^^^^^^^^^^^^^^^^^ expected `()`, found `bool` + | +help: parentheses are required to parse this as an expression + | +LL | (match () { _ => true }) && true + | + + + +error[E0308]: mismatched types + --> $DIR/expr-as-stmt.rs:85:28 + | +LL | fn matches() -> bool { + | ---- expected `bool` because of return type +... +LL | match () { _ => true } && true + | ^^^^^^^ expected `bool`, found `&&bool` + | +help: parentheses are required to parse this as an expression + | +LL | (match () { _ => true }) && true + | + + + +error: aborting due to 28 previous errors Some errors have detailed explanations: E0308, E0600, E0614. For more information about an error, try `rustc --explain E0308`. diff --git a/tests/ui/privacy/suggest-box-new.rs b/tests/ui/privacy/suggest-box-new.rs index 7125285fc776..ff585387020e 100644 --- a/tests/ui/privacy/suggest-box-new.rs +++ b/tests/ui/privacy/suggest-box-new.rs @@ -16,4 +16,7 @@ fn main() { let _ = std::collections::HashMap {}; //~^ ERROR cannot construct `HashMap<_, _, _>` with struct literal syntax due to private fields let _ = Box {}; //~ ERROR cannot construct `Box<_, _>` with struct literal syntax due to private fields + + // test that we properly instantiate the parameter of `Box::::new` with an inference variable + let _ = Box:: {}; //~ ERROR cannot construct `Box` with struct literal syntax due to private fields } diff --git a/tests/ui/privacy/suggest-box-new.stderr b/tests/ui/privacy/suggest-box-new.stderr index 2b48e9046bf0..37b2989dcc14 100644 --- a/tests/ui/privacy/suggest-box-new.stderr +++ b/tests/ui/privacy/suggest-box-new.stderr @@ -118,13 +118,41 @@ LL + let _ = Box::new_zeroed(); LL - let _ = Box {}; LL + let _ = Box::new_in(_, _); | - = and 12 other candidates + = and 13 other candidates help: consider using the `Default` trait | LL - let _ = Box {}; LL + let _ = ::default(); | -error: aborting due to 4 previous errors +error: cannot construct `Box` with struct literal syntax due to private fields + --> $DIR/suggest-box-new.rs:21:13 + | +LL | let _ = Box:: {}; + | ^^^^^^^^^^ + | + = note: private fields `0` and `1` that were not provided +help: you might have meant to use an associated function to build this type + | +LL - let _ = Box:: {}; +LL + let _ = Box::::new(_); + | +LL - let _ = Box:: {}; +LL + let _ = Box::::new_in(_, _); + | +LL - let _ = Box:: {}; +LL + let _ = Box::::into_inner(_); + | +LL - let _ = Box:: {}; +LL + let _ = Box::::write(_, _); + | + = and 4 other candidates +help: consider using the `Default` trait + | +LL - let _ = Box:: {}; +LL + let _ = as std::default::Default>::default(); + | + +error: aborting due to 5 previous errors For more information about this error, try `rustc --explain E0423`. diff --git a/tests/ui/privacy/suggest-new-projection-ice.rs b/tests/ui/privacy/suggest-new-projection-ice.rs new file mode 100644 index 000000000000..41ac27508e8a --- /dev/null +++ b/tests/ui/privacy/suggest-new-projection-ice.rs @@ -0,0 +1,19 @@ +//! Regression test for . +//! Ensure that we don't ICE when an associated function returns an associated type. + +mod m { + pub trait Project { + type Assoc; + } + pub struct Foo { + _priv: (), + } + impl Foo { + fn new() -> T::Assoc { + todo!() + } + } +} +fn main() { + let _ = m::Foo {}; //~ ERROR: cannot construct `Foo` +} diff --git a/tests/ui/privacy/suggest-new-projection-ice.stderr b/tests/ui/privacy/suggest-new-projection-ice.stderr new file mode 100644 index 000000000000..4700772096b9 --- /dev/null +++ b/tests/ui/privacy/suggest-new-projection-ice.stderr @@ -0,0 +1,10 @@ +error: cannot construct `Foo` with struct literal syntax due to private fields + --> $DIR/suggest-new-projection-ice.rs:18:13 + | +LL | let _ = m::Foo {}; + | ^^^^^^ + | + = note: private field `_priv` that was not provided + +error: aborting due to 1 previous error + diff --git a/tests/ui/suggestions/multi-suggestion.ascii.stderr b/tests/ui/suggestions/multi-suggestion.ascii.stderr index 1744162e6cec..9c8867a17711 100644 --- a/tests/ui/suggestions/multi-suggestion.ascii.stderr +++ b/tests/ui/suggestions/multi-suggestion.ascii.stderr @@ -118,7 +118,7 @@ LL + let _ = Box::new_zeroed(); LL - let _ = Box {}; LL + let _ = Box::new_in(_, _); | - = and 12 other candidates + = and 13 other candidates help: consider using the `Default` trait | LL - let _ = Box {}; diff --git a/tests/ui/suggestions/multi-suggestion.unicode.stderr b/tests/ui/suggestions/multi-suggestion.unicode.stderr index 4835c263f190..4fdab51493e2 100644 --- a/tests/ui/suggestions/multi-suggestion.unicode.stderr +++ b/tests/ui/suggestions/multi-suggestion.unicode.stderr @@ -118,7 +118,7 @@ LL + let _ = Box::new_zeroed(); LL - let _ = Box {}; LL + let _ = Box::new_in(_, _); │ - ╰ and 12 other candidates + ╰ and 13 other candidates help: consider using the `Default` trait ╭╴ LL - let _ = Box {}; diff --git a/tests/ui/traits/bound/suggest-complex-bound-on-method.fixed b/tests/ui/traits/bound/suggest-complex-bound-on-method.fixed new file mode 100644 index 000000000000..719835af0a9f --- /dev/null +++ b/tests/ui/traits/bound/suggest-complex-bound-on-method.fixed @@ -0,0 +1,23 @@ +//@ run-rustfix +#![allow(dead_code)] +struct Application; +// https://github.com/rust-lang/rust/issues/144734 +trait Trait { + type Error: std::error::Error; + + fn run(&self) -> Result<(), Self::Error>; +} + +#[derive(Debug)] +enum ApplicationError { + Quit, +} + +impl Application { + fn thing(&self, t: T) -> Result<(), ApplicationError> where ApplicationError: From<::Error> { + t.run()?; //~ ERROR E0277 + Ok(()) + } +} + +fn main() {} diff --git a/tests/ui/traits/bound/suggest-complex-bound-on-method.rs b/tests/ui/traits/bound/suggest-complex-bound-on-method.rs new file mode 100644 index 000000000000..39cec571242d --- /dev/null +++ b/tests/ui/traits/bound/suggest-complex-bound-on-method.rs @@ -0,0 +1,23 @@ +//@ run-rustfix +#![allow(dead_code)] +struct Application; +// https://github.com/rust-lang/rust/issues/144734 +trait Trait { + type Error: std::error::Error; + + fn run(&self) -> Result<(), Self::Error>; +} + +#[derive(Debug)] +enum ApplicationError { + Quit, +} + +impl Application { + fn thing(&self, t: T) -> Result<(), ApplicationError> { + t.run()?; //~ ERROR E0277 + Ok(()) + } +} + +fn main() {} diff --git a/tests/ui/traits/bound/suggest-complex-bound-on-method.stderr b/tests/ui/traits/bound/suggest-complex-bound-on-method.stderr new file mode 100644 index 000000000000..ac45f0495411 --- /dev/null +++ b/tests/ui/traits/bound/suggest-complex-bound-on-method.stderr @@ -0,0 +1,22 @@ +error[E0277]: `?` couldn't convert the error to `ApplicationError` + --> $DIR/suggest-complex-bound-on-method.rs:18:16 + | +LL | t.run()?; + | -----^ the trait `From<::Error>` is not implemented for `ApplicationError` + | | + | this can't be annotated with `?` because it has type `Result<_, ::Error>` + | +note: `ApplicationError` needs to implement `From<::Error>` + --> $DIR/suggest-complex-bound-on-method.rs:12:1 + | +LL | enum ApplicationError { + | ^^^^^^^^^^^^^^^^^^^^^ + = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait +help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement + | +LL | fn thing(&self, t: T) -> Result<(), ApplicationError> where ApplicationError: From<::Error> { + | +++++++++++++++++++++++++++++++++++++++++++++++++ + +error: aborting due to 1 previous error + +For more information about this error, try `rustc --explain E0277`. diff --git a/tests/ui/traits/const-traits/constructor-const-fn.rs b/tests/ui/traits/const-traits/constructor-const-fn.rs index 4a7bf531df23..af40ad94d1c0 100644 --- a/tests/ui/traits/const-traits/constructor-const-fn.rs +++ b/tests/ui/traits/const-traits/constructor-const-fn.rs @@ -1,7 +1,7 @@ //@ check-pass //@ compile-flags: -Znext-solver #![feature(const_trait_impl)] -const fn impls_fn Foo>(_: &F) {} +const fn impls_fn Foo>(_: &F) {} struct Foo(u32); diff --git a/tests/ui/traits/const-traits/reservation-impl-ice.rs b/tests/ui/traits/const-traits/reservation-impl-ice.rs index 7fefb4ec5439..3fbfe8c950da 100644 --- a/tests/ui/traits/const-traits/reservation-impl-ice.rs +++ b/tests/ui/traits/const-traits/reservation-impl-ice.rs @@ -1,7 +1,7 @@ //@ compile-flags: -Znext-solver #![feature(const_convert, never_type, const_trait_impl)] -const fn impls_from>() {} +const fn impls_from>() {} const fn foo() { // This previously ICE'd when encountering the reservation impl diff --git a/tests/ui/traits/const-traits/reservation-impl-ice.stderr b/tests/ui/traits/const-traits/reservation-impl-ice.stderr index a3fdcbac69e3..d30c014d63f1 100644 --- a/tests/ui/traits/const-traits/reservation-impl-ice.stderr +++ b/tests/ui/traits/const-traits/reservation-impl-ice.stderr @@ -17,8 +17,8 @@ LL | impls_from::<()>(); note: required by a bound in `impls_from` --> $DIR/reservation-impl-ice.rs:4:24 | -LL | const fn impls_from>() {} - | ^^^^^^^^^^^^^^ required by this bound in `impls_from` +LL | const fn impls_from>() {} + | ^^^^^^^^^^^^^^^ required by this bound in `impls_from` error: aborting due to 1 previous error diff --git a/triagebot.toml b/triagebot.toml index b957c6465e60..bf9bfee4306d 100644 --- a/triagebot.toml +++ b/triagebot.toml @@ -235,7 +235,6 @@ trigger_files = [ "src/etc/htmldocck.py", "src/tools/jsondocck", "src/tools/jsondoclint", - "src/tools/rustdoc-gui", "src/tools/rustdoc-js", "src/tools/rustdoc-themes", @@ -336,6 +335,7 @@ trigger_files = [ "tests/mir-opt", "tests/pretty", "tests/run-make", + "tests/run-make-cargo", "tests/ui", "tests/ui-fulldeps", ] @@ -380,6 +380,7 @@ trigger_files = [ [autolabel."O-apple"] trigger_files = [ "library/std/src/os/darwin", + "library/std/src/sys/platform_version/darwin", "library/std/src/sys/sync/thread_parking/darwin.rs", "compiler/rustc_target/src/spec/base/apple", ] @@ -592,6 +593,7 @@ trigger_files = [ [autolabel."A-run-make"] trigger_files = [ "tests/run-make", + "tests/run-make-cargo", "src/tools/run-make-support" ] @@ -1542,6 +1544,7 @@ dep-bumps = [ "/src/rustdoc-json-types" = ["rustdoc"] "/src/stage0" = ["bootstrap"] "/tests/run-make" = ["@jieyouxu"] +"/tests/run-make-cargo" = ["@jieyouxu"] "/tests/rustdoc" = ["rustdoc"] "/tests/rustdoc-gui" = ["rustdoc"] "/tests/rustdoc-js-std" = ["rustdoc"]