use crate::errors; use crate::interface::{Compiler, Result}; use crate::proc_macro_decls; use crate::util; use ast::CRATE_NODE_ID; use rustc_ast::{self as ast, visit}; use rustc_borrowck as mir_borrowck; use rustc_codegen_ssa::traits::CodegenBackend; use rustc_data_structures::parallel; use rustc_data_structures::steal::Steal; use rustc_data_structures::sync::{Lrc, OnceCell, WorkerLocal}; use rustc_errors::PResult; use rustc_expand::base::{ExtCtxt, LintStoreExpand, ResolverExpand}; use rustc_hir::def_id::{StableCrateId, LOCAL_CRATE}; use rustc_lint::{unerased_lint_store, BufferedEarlyLint, EarlyCheckNode, LintStore}; use rustc_metadata::creader::CStore; use rustc_middle::arena::Arena; use rustc_middle::dep_graph::DepGraph; use rustc_middle::ty::query::{ExternProviders, Providers}; use rustc_middle::ty::{self, GlobalCtxt, RegisteredTools, TyCtxt}; use rustc_mir_build as mir_build; use rustc_parse::{parse_crate_from_file, parse_crate_from_source_str, validate_attr}; use rustc_passes::{self, hir_stats, layout_test}; use rustc_plugin_impl as plugin; use rustc_query_impl::{OnDiskCache, Queries as TcxQueries}; use rustc_resolve::Resolver; use rustc_session::config::{CrateType, Input, OutputFilenames, OutputType}; use rustc_session::cstore::{CrateStoreDyn, MetadataLoader, Untracked}; use rustc_session::output::filename_for_input; use rustc_session::search_paths::PathKind; use rustc_session::{Limit, Session}; use rustc_span::symbol::{sym, Symbol}; use rustc_span::FileName; use rustc_target::spec::PanicStrategy; use rustc_trait_selection::traits; use std::any::Any; use std::ffi::OsString; use std::io::{self, BufWriter, Write}; use std::path::{Path, PathBuf}; use std::sync::{Arc, LazyLock}; use std::{env, fs, iter}; pub fn parse<'a>(sess: &'a Session) -> PResult<'a, ast::Crate> { let krate = sess.time("parse_crate", || match &sess.io.input { Input::File(file) => parse_crate_from_file(file, &sess.parse_sess), Input::Str { input, name } => { parse_crate_from_source_str(name.clone(), input.clone(), &sess.parse_sess) } })?; if sess.opts.unstable_opts.input_stats { eprintln!("Lines of code: {}", sess.source_map().count_lines()); eprintln!("Pre-expansion node count: {}", count_nodes(&krate)); } if let Some(ref s) = sess.opts.unstable_opts.show_span { rustc_ast_passes::show_span::run(sess.diagnostic(), s, &krate); } if sess.opts.unstable_opts.hir_stats { hir_stats::print_ast_stats(&krate, "PRE EXPANSION AST STATS", "ast-stats-1"); } Ok(krate) } fn count_nodes(krate: &ast::Crate) -> usize { let mut counter = rustc_ast_passes::node_count::NodeCounter::new(); visit::walk_crate(&mut counter, krate); counter.count } pub fn register_plugins<'a>( sess: &'a Session, metadata_loader: &'a dyn MetadataLoader, register_lints: impl Fn(&Session, &mut LintStore), mut krate: ast::Crate, crate_name: Symbol, ) -> Result<(ast::Crate, LintStore)> { krate = sess.time("attributes_injection", || { rustc_builtin_macros::cmdline_attrs::inject( krate, &sess.parse_sess, &sess.opts.unstable_opts.crate_attr, ) }); let (krate, features) = rustc_expand::config::features(sess, krate, CRATE_NODE_ID); // these need to be set "early" so that expansion sees `quote` if enabled. sess.init_features(features); let crate_types = util::collect_crate_types(sess, &krate.attrs); sess.init_crate_types(crate_types); let stable_crate_id = StableCrateId::new( crate_name, sess.crate_types().contains(&CrateType::Executable), sess.opts.cg.metadata.clone(), ); sess.stable_crate_id.set(stable_crate_id).expect("not yet initialized"); rustc_incremental::prepare_session_directory(sess, crate_name, stable_crate_id)?; if sess.opts.incremental.is_some() { sess.time("incr_comp_garbage_collect_session_directories", || { if let Err(e) = rustc_incremental::garbage_collect_session_directories(sess) { warn!( "Error while trying to garbage collect incremental \ compilation cache directory: {}", e ); } }); } let mut lint_store = rustc_lint::new_lint_store(sess.enable_internal_lints()); register_lints(sess, &mut lint_store); let registrars = sess.time("plugin_loading", || plugin::load::load_plugins(sess, metadata_loader, &krate)); sess.time("plugin_registration", || { let mut registry = plugin::Registry { lint_store: &mut lint_store }; for registrar in registrars { registrar(&mut registry); } }); Ok((krate, lint_store)) } fn pre_expansion_lint<'a>( sess: &Session, lint_store: &LintStore, registered_tools: &RegisteredTools, check_node: impl EarlyCheckNode<'a>, node_name: Symbol, ) { sess.prof.generic_activity_with_arg("pre_AST_expansion_lint_checks", node_name.as_str()).run( || { rustc_lint::check_ast_node( sess, true, lint_store, registered_tools, None, rustc_lint::BuiltinCombinedPreExpansionLintPass::new(), check_node, ); }, ); } // Cannot implement directly for `LintStore` due to trait coherence. struct LintStoreExpandImpl<'a>(&'a LintStore); impl LintStoreExpand for LintStoreExpandImpl<'_> { fn pre_expansion_lint( &self, sess: &Session, registered_tools: &RegisteredTools, node_id: ast::NodeId, attrs: &[ast::Attribute], items: &[rustc_ast::ptr::P], name: Symbol, ) { pre_expansion_lint(sess, self.0, registered_tools, (node_id, attrs, items), name); } } /// Runs the "early phases" of the compiler: initial `cfg` processing, loading compiler plugins, /// syntax expansion, secondary `cfg` expansion, synthesis of a test /// harness if one is to be provided, injection of a dependency on the /// standard library and prelude, and name resolution. #[instrument(level = "trace", skip(krate, resolver))] fn configure_and_expand(mut krate: ast::Crate, resolver: &mut Resolver<'_, '_>) -> ast::Crate { let tcx = resolver.tcx(); let sess = tcx.sess; let lint_store = unerased_lint_store(tcx); let crate_name = tcx.crate_name(LOCAL_CRATE); pre_expansion_lint(sess, lint_store, resolver.registered_tools(), &krate, crate_name); rustc_builtin_macros::register_builtin_macros(resolver); krate = sess.time("crate_injection", || { rustc_builtin_macros::standard_library_imports::inject(krate, resolver, sess) }); util::check_attr_crate_type(sess, &krate.attrs, &mut resolver.lint_buffer()); // Expand all macros krate = sess.time("macro_expand_crate", || { // Windows dlls do not have rpaths, so they don't know how to find their // dependencies. It's up to us to tell the system where to find all the // dependent dlls. Note that this uses cfg!(windows) as opposed to // targ_cfg because syntax extensions are always loaded for the host // compiler, not for the target. // // This is somewhat of an inherently racy operation, however, as // multiple threads calling this function could possibly continue // extending PATH far beyond what it should. To solve this for now we // just don't add any new elements to PATH which are already there // within PATH. This is basically a targeted fix at #17360 for rustdoc // which runs rustc in parallel but has been seen (#33844) to cause // problems with PATH becoming too long. let mut old_path = OsString::new(); if cfg!(windows) { old_path = env::var_os("PATH").unwrap_or(old_path); let mut new_path = sess.host_filesearch(PathKind::All).search_path_dirs(); for path in env::split_paths(&old_path) { if !new_path.contains(&path) { new_path.push(path); } } env::set_var( "PATH", &env::join_paths( new_path.iter().filter(|p| env::join_paths(iter::once(p)).is_ok()), ) .unwrap(), ); } // Create the config for macro expansion let features = sess.features_untracked(); let recursion_limit = get_recursion_limit(&krate.attrs, sess); let cfg = rustc_expand::expand::ExpansionConfig { features: Some(features), recursion_limit, trace_mac: sess.opts.unstable_opts.trace_macros, should_test: sess.opts.test, span_debug: sess.opts.unstable_opts.span_debug, proc_macro_backtrace: sess.opts.unstable_opts.proc_macro_backtrace, ..rustc_expand::expand::ExpansionConfig::default(crate_name.to_string()) }; let lint_store = LintStoreExpandImpl(lint_store); let mut ecx = ExtCtxt::new(sess, cfg, resolver, Some(&lint_store)); // Expand macros now! let krate = sess.time("expand_crate", || ecx.monotonic_expander().expand_crate(krate)); // The rest is error reporting sess.parse_sess.buffered_lints.with_lock(|buffered_lints: &mut Vec| { buffered_lints.append(&mut ecx.buffered_early_lint); }); sess.time("check_unused_macros", || { ecx.check_unused_macros(); }); // If we hit a recursion limit, exit early to avoid later passes getting overwhelmed // with a large AST if ecx.reduced_recursion_limit.is_some() { sess.abort_if_errors(); unreachable!(); } if cfg!(windows) { env::set_var("PATH", &old_path); } krate }); sess.time("maybe_building_test_harness", || { rustc_builtin_macros::test_harness::inject(sess, resolver, &mut krate) }); let has_proc_macro_decls = sess.time("AST_validation", || { rustc_ast_passes::ast_validation::check_crate(sess, &krate, resolver.lint_buffer()) }); let crate_types = sess.crate_types(); let is_executable_crate = crate_types.contains(&CrateType::Executable); let is_proc_macro_crate = crate_types.contains(&CrateType::ProcMacro); if crate_types.len() > 1 { if is_executable_crate { sess.emit_err(errors::MixedBinCrate); } if is_proc_macro_crate { sess.emit_err(errors::MixedProcMacroCrate); } } if is_proc_macro_crate && sess.panic_strategy() == PanicStrategy::Abort { sess.emit_warning(errors::ProcMacroCratePanicAbort); } krate = sess.time("maybe_create_a_macro_crate", || { let is_test_crate = sess.opts.test; rustc_builtin_macros::proc_macro_harness::inject( sess, resolver, krate, is_proc_macro_crate, has_proc_macro_decls, is_test_crate, sess.diagnostic(), ) }); // Done with macro expansion! if sess.opts.unstable_opts.input_stats { eprintln!("Post-expansion node count: {}", count_nodes(&krate)); } if sess.opts.unstable_opts.hir_stats { hir_stats::print_ast_stats(&krate, "POST EXPANSION AST STATS", "ast-stats-2"); } resolver.resolve_crate(&krate); // Needs to go *after* expansion to be able to check the results of macro expansion. sess.time("complete_gated_feature_checking", || { rustc_ast_passes::feature_gate::check_crate(&krate, sess); }); // Add all buffered lints from the `ParseSess` to the `Session`. sess.parse_sess.buffered_lints.with_lock(|buffered_lints| { info!("{} parse sess buffered_lints", buffered_lints.len()); for early_lint in buffered_lints.drain(..) { resolver.lint_buffer().add_early_lint(early_lint); } }); // Gate identifiers containing invalid Unicode codepoints that were recovered during lexing. sess.parse_sess.bad_unicode_identifiers.with_lock(|identifiers| { let mut identifiers: Vec<_> = identifiers.drain().collect(); identifiers.sort_by_key(|&(key, _)| key); for (ident, mut spans) in identifiers.into_iter() { spans.sort(); if ident == sym::ferris { let first_span = spans[0]; sess.emit_err(errors::FerrisIdentifier { spans, first_span }); } else { sess.emit_err(errors::EmojiIdentifier { spans, ident }); } } }); sess.time("early_lint_checks", || { let lint_buffer = Some(std::mem::take(resolver.lint_buffer())); rustc_lint::check_ast_node( sess, false, lint_store, resolver.registered_tools(), lint_buffer, rustc_lint::BuiltinCombinedEarlyLintPass::new(), &krate, ) }); krate } // Returns all the paths that correspond to generated files. fn generated_output_paths( sess: &Session, outputs: &OutputFilenames, exact_name: bool, crate_name: Symbol, ) -> Vec { let mut out_filenames = Vec::new(); for output_type in sess.opts.output_types.keys() { let file = outputs.path(*output_type); match *output_type { // If the filename has been overridden using `-o`, it will not be modified // by appending `.rlib`, `.exe`, etc., so we can skip this transformation. OutputType::Exe if !exact_name => { for crate_type in sess.crate_types().iter() { let p = filename_for_input(sess, *crate_type, crate_name, outputs); out_filenames.push(p); } } OutputType::DepInfo if sess.opts.unstable_opts.dep_info_omit_d_target => { // Don't add the dep-info output when omitting it from dep-info targets } _ => { out_filenames.push(file); } } } out_filenames } // Runs `f` on every output file path and returns the first non-None result, or None if `f` // returns None for every file path. fn check_output(output_paths: &[PathBuf], f: F) -> Option where F: Fn(&PathBuf) -> Option, { for output_path in output_paths { if let Some(result) = f(output_path) { return Some(result); } } None } fn output_contains_path(output_paths: &[PathBuf], input_path: &Path) -> bool { let input_path = input_path.canonicalize().ok(); if input_path.is_none() { return false; } let check = |output_path: &PathBuf| { if output_path.canonicalize().ok() == input_path { Some(()) } else { None } }; check_output(output_paths, check).is_some() } fn output_conflicts_with_dir(output_paths: &[PathBuf]) -> Option { let check = |output_path: &PathBuf| output_path.is_dir().then(|| output_path.clone()); check_output(output_paths, check) } fn escape_dep_filename(filename: &str) -> String { // Apparently clang and gcc *only* escape spaces: // https://llvm.org/klaus/clang/commit/9d50634cfc268ecc9a7250226dd5ca0e945240d4 filename.replace(' ', "\\ ") } // Makefile comments only need escaping newlines and `\`. // The result can be unescaped by anything that can unescape `escape_default` and friends. fn escape_dep_env(symbol: Symbol) -> String { let s = symbol.as_str(); let mut escaped = String::with_capacity(s.len()); for c in s.chars() { match c { '\n' => escaped.push_str(r"\n"), '\r' => escaped.push_str(r"\r"), '\\' => escaped.push_str(r"\\"), _ => escaped.push(c), } } escaped } fn write_out_deps( sess: &Session, cstore: &CrateStoreDyn, outputs: &OutputFilenames, out_filenames: &[PathBuf], ) { // Write out dependency rules to the dep-info file if requested if !sess.opts.output_types.contains_key(&OutputType::DepInfo) { return; } let deps_filename = outputs.path(OutputType::DepInfo); let result: io::Result<()> = try { // Build a list of files used to compile the output and // write Makefile-compatible dependency rules let mut files: Vec = sess .source_map() .files() .iter() .filter(|fmap| fmap.is_real_file()) .filter(|fmap| !fmap.is_imported()) .map(|fmap| escape_dep_filename(&fmap.name.prefer_local().to_string())) .collect(); // Account for explicitly marked-to-track files // (e.g. accessed in proc macros). let file_depinfo = sess.parse_sess.file_depinfo.borrow(); let normalize_path = |path: PathBuf| { let file = FileName::from(path); escape_dep_filename(&file.prefer_local().to_string()) }; let extra_tracked_files = file_depinfo.iter().map(|path_sym| normalize_path(PathBuf::from(path_sym.as_str()))); files.extend(extra_tracked_files); // We also need to track used PGO profile files if let Some(ref profile_instr) = sess.opts.cg.profile_use { files.push(normalize_path(profile_instr.as_path().to_path_buf())); } if let Some(ref profile_sample) = sess.opts.unstable_opts.profile_sample_use { files.push(normalize_path(profile_sample.as_path().to_path_buf())); } if sess.binary_dep_depinfo() { if let Some(ref backend) = sess.opts.unstable_opts.codegen_backend { if backend.contains('.') { // If the backend name contain a `.`, it is the path to an external dynamic // library. If not, it is not a path. files.push(backend.to_string()); } } let cstore = cstore.as_any().downcast_ref::().unwrap(); for cnum in cstore.crates_untracked() { let source = cstore.crate_source_untracked(cnum); if let Some((path, _)) = &source.dylib { files.push(escape_dep_filename(&path.display().to_string())); } if let Some((path, _)) = &source.rlib { files.push(escape_dep_filename(&path.display().to_string())); } if let Some((path, _)) = &source.rmeta { files.push(escape_dep_filename(&path.display().to_string())); } } } let mut file = BufWriter::new(fs::File::create(&deps_filename)?); for path in out_filenames { writeln!(file, "{}: {}\n", path.display(), files.join(" "))?; } // Emit a fake target for each input file to the compilation. This // prevents `make` from spitting out an error if a file is later // deleted. For more info see #28735 for path in files { writeln!(file, "{path}:")?; } // Emit special comments with information about accessed environment variables. let env_depinfo = sess.parse_sess.env_depinfo.borrow(); if !env_depinfo.is_empty() { let mut envs: Vec<_> = env_depinfo .iter() .map(|(k, v)| (escape_dep_env(*k), v.map(escape_dep_env))) .collect(); envs.sort_unstable(); writeln!(file)?; for (k, v) in envs { write!(file, "# env-dep:{k}")?; if let Some(v) = v { write!(file, "={v}")?; } writeln!(file)?; } } }; match result { Ok(_) => { if sess.opts.json_artifact_notifications { sess.parse_sess .span_diagnostic .emit_artifact_notification(&deps_filename, "dep-info"); } } Err(error) => { sess.emit_fatal(errors::ErrorWritingDependencies { path: &deps_filename, error }); } } } fn resolver_for_lowering<'tcx>( tcx: TyCtxt<'tcx>, (): (), ) -> &'tcx Steal<(ty::ResolverAstLowering, Lrc)> { let arenas = Resolver::arenas(); let krate = tcx.crate_for_resolver(()).steal(); let mut resolver = Resolver::new(tcx, &krate, &arenas); let krate = configure_and_expand(krate, &mut resolver); // Make sure we don't mutate the cstore from here on. tcx.untracked().cstore.leak(); let ty::ResolverOutputs { global_ctxt: untracked_resolutions, ast_lowering: untracked_resolver_for_lowering, } = resolver.into_outputs(); let feed = tcx.feed_unit_query(); feed.resolutions(tcx.arena.alloc(untracked_resolutions)); tcx.arena.alloc(Steal::new((untracked_resolver_for_lowering, Lrc::new(krate)))) } fn output_filenames(tcx: TyCtxt<'_>, (): ()) -> Arc { let sess = tcx.sess; let _timer = sess.timer("prepare_outputs"); let (_, krate) = &*tcx.resolver_for_lowering(()).borrow(); let crate_name = tcx.crate_name(LOCAL_CRATE); // FIXME: rustdoc passes &[] instead of &krate.attrs here let outputs = util::build_output_filenames(&krate.attrs, sess); let output_paths = generated_output_paths(sess, &outputs, sess.io.output_file.is_some(), crate_name); // Ensure the source file isn't accidentally overwritten during compilation. if let Some(ref input_path) = sess.io.input.opt_path() { if sess.opts.will_create_output_file() { if output_contains_path(&output_paths, input_path) { sess.emit_fatal(errors::InputFileWouldBeOverWritten { path: input_path }); } if let Some(ref dir_path) = output_conflicts_with_dir(&output_paths) { sess.emit_fatal(errors::GeneratedFileConflictsWithDirectory { input_path, dir_path, }); } } } if let Some(ref dir) = sess.io.temps_dir { if fs::create_dir_all(dir).is_err() { sess.emit_fatal(errors::TempsDirError); } } write_out_deps(sess, &*tcx.cstore_untracked(), &outputs, &output_paths); let only_dep_info = sess.opts.output_types.contains_key(&OutputType::DepInfo) && sess.opts.output_types.len() == 1; if !only_dep_info { if let Some(ref dir) = sess.io.output_dir { if fs::create_dir_all(dir).is_err() { sess.emit_fatal(errors::OutDirError); } } } outputs.into() } pub static DEFAULT_QUERY_PROVIDERS: LazyLock = LazyLock::new(|| { let providers = &mut Providers::default(); providers.analysis = analysis; providers.hir_crate = rustc_ast_lowering::lower_to_hir; providers.output_filenames = output_filenames; providers.resolver_for_lowering = resolver_for_lowering; proc_macro_decls::provide(providers); rustc_const_eval::provide(providers); rustc_middle::hir::provide(providers); mir_borrowck::provide(providers); mir_build::provide(providers); rustc_mir_transform::provide(providers); rustc_monomorphize::provide(providers); rustc_privacy::provide(providers); rustc_hir_analysis::provide(providers); rustc_hir_typeck::provide(providers); ty::provide(providers); traits::provide(providers); rustc_passes::provide(providers); rustc_traits::provide(providers); rustc_ty_utils::provide(providers); rustc_metadata::provide(providers); rustc_lint::provide(providers); rustc_symbol_mangling::provide(providers); rustc_codegen_ssa::provide(providers); *providers }); pub static DEFAULT_EXTERN_QUERY_PROVIDERS: LazyLock = LazyLock::new(|| { let mut extern_providers = ExternProviders::default(); rustc_metadata::provide_extern(&mut extern_providers); rustc_codegen_ssa::provide_extern(&mut extern_providers); extern_providers }); pub fn create_global_ctxt<'tcx>( compiler: &'tcx Compiler, lint_store: Lrc, dep_graph: DepGraph, untracked: Untracked, queries: &'tcx OnceCell>, gcx_cell: &'tcx OnceCell>, arena: &'tcx WorkerLocal>, hir_arena: &'tcx WorkerLocal>, ) -> &'tcx GlobalCtxt<'tcx> { // We're constructing the HIR here; we don't care what we will // read, since we haven't even constructed the *input* to // incr. comp. yet. dep_graph.assert_ignored(); let sess = &compiler.session(); let query_result_on_disk_cache = rustc_incremental::load_query_result_cache(sess); let codegen_backend = compiler.codegen_backend(); let mut local_providers = *DEFAULT_QUERY_PROVIDERS; codegen_backend.provide(&mut local_providers); let mut extern_providers = *DEFAULT_EXTERN_QUERY_PROVIDERS; codegen_backend.provide_extern(&mut extern_providers); if let Some(callback) = compiler.override_queries { callback(sess, &mut local_providers, &mut extern_providers); } let queries = queries.get_or_init(|| { TcxQueries::new(local_providers, extern_providers, query_result_on_disk_cache) }); sess.time("setup_global_ctxt", || { gcx_cell.get_or_init(move || { TyCtxt::create_global_ctxt( sess, lint_store, arena, hir_arena, untracked, dep_graph, queries.on_disk_cache.as_ref().map(OnDiskCache::as_dyn), queries.as_dyn(), rustc_query_impl::query_callbacks(arena), ) }) }) } /// Runs the resolution, type-checking, region checking and other /// miscellaneous analysis passes on the crate. fn analysis(tcx: TyCtxt<'_>, (): ()) -> Result<()> { rustc_passes::hir_id_validator::check_crate(tcx); let sess = tcx.sess; let mut entry_point = None; sess.time("misc_checking_1", || { parallel!( { entry_point = sess.time("looking_for_entry_point", || tcx.entry_fn(())); sess.time("looking_for_derive_registrar", || { tcx.ensure().proc_macro_decls_static(()) }); CStore::from_tcx(tcx).report_unused_deps(tcx); }, { tcx.hir().par_for_each_module(|module| { tcx.ensure().check_mod_loops(module); tcx.ensure().check_mod_attrs(module); tcx.ensure().check_mod_naked_functions(module); tcx.ensure().check_mod_unstable_api_usage(module); tcx.ensure().check_mod_const_bodies(module); }); }, { sess.time("unused_lib_feature_checking", || { rustc_passes::stability::check_unused_or_stable_features(tcx) }); }, { // We force these queries to run, // since they might not otherwise get called. // This marks the corresponding crate-level attributes // as used, and ensures that their values are valid. tcx.ensure().limits(()); tcx.ensure().stability_index(()); } ); }); // passes are timed inside typeck rustc_hir_analysis::check_crate(tcx)?; sess.time("misc_checking_2", || { parallel!( { sess.time("match_checking", || { tcx.hir().par_body_owners(|def_id| tcx.ensure().check_match(def_id.to_def_id())) }); }, { sess.time("liveness_checking", || { tcx.hir().par_body_owners(|def_id| { // this must run before MIR dump, because // "not all control paths return a value" is reported here. // // maybe move the check to a MIR pass? tcx.ensure().check_liveness(def_id.to_def_id()); }); }); } ); }); sess.time("MIR_borrow_checking", || { tcx.hir().par_body_owners(|def_id| tcx.ensure().mir_borrowck(def_id)); }); sess.time("MIR_effect_checking", || { for def_id in tcx.hir().body_owners() { tcx.ensure().thir_check_unsafety(def_id); if !tcx.sess.opts.unstable_opts.thir_unsafeck { rustc_mir_transform::check_unsafety::check_unsafety(tcx, def_id); } tcx.ensure().has_ffi_unwind_calls(def_id); if tcx.hir().body_const_context(def_id).is_some() { tcx.ensure() .mir_drops_elaborated_and_const_checked(ty::WithOptConstParam::unknown(def_id)); } } }); if tcx.sess.opts.unstable_opts.drop_tracking_mir { tcx.hir().par_body_owners(|def_id| { if let rustc_hir::def::DefKind::Generator = tcx.def_kind(def_id) { tcx.ensure().mir_generator_witnesses(def_id); tcx.ensure().check_generator_obligations(def_id); } }); } sess.time("layout_testing", || layout_test::test_layout(tcx)); // Avoid overwhelming user with errors if borrow checking failed. // I'm not sure how helpful this is, to be honest, but it avoids a // lot of annoying errors in the ui tests (basically, // lint warnings and so on -- kindck used to do this abort, but // kindck is gone now). -nmatsakis if let Some(reported) = sess.has_errors() { return Err(reported); } sess.time("misc_checking_3", || { parallel!( { tcx.ensure().effective_visibilities(()); parallel!( { tcx.ensure().check_private_in_public(()); }, { tcx.hir() .par_for_each_module(|module| tcx.ensure().check_mod_deathness(module)); }, { sess.time("lint_checking", || { rustc_lint::check_crate(tcx, || { rustc_lint::BuiltinCombinedLateLintPass::new() }); }); } ); }, { sess.time("privacy_checking_modules", || { tcx.hir().par_for_each_module(|module| { tcx.ensure().check_mod_privacy(module); }); }); } ); // This check has to be run after all lints are done processing. We don't // define a lint filter, as all lint checks should have finished at this point. sess.time("check_lint_expectations", || tcx.check_expectations(None)); }); Ok(()) } /// Runs the codegen backend, after which the AST and analysis can /// be discarded. pub fn start_codegen<'tcx>( codegen_backend: &dyn CodegenBackend, tcx: TyCtxt<'tcx>, ) -> Box { info!("Pre-codegen\n{:?}", tcx.debug_stats()); let (metadata, need_metadata_module) = rustc_metadata::fs::encode_and_write_metadata(tcx); let codegen = tcx.sess.time("codegen_crate", move || { codegen_backend.codegen_crate(tcx, metadata, need_metadata_module) }); // Don't run these test assertions when not doing codegen. Compiletest tries to build // build-fail tests in check mode first and expects it to not give an error in that case. if tcx.sess.opts.output_types.should_codegen() { rustc_incremental::assert_module_sources::assert_module_sources(tcx); rustc_symbol_mangling::test::report_symbol_names(tcx); } info!("Post-codegen\n{:?}", tcx.debug_stats()); if tcx.sess.opts.output_types.contains_key(&OutputType::Mir) { if let Err(error) = rustc_mir_transform::dump_mir::emit_mir(tcx) { tcx.sess.emit_err(errors::CantEmitMIR { error }); tcx.sess.abort_if_errors(); } } codegen } fn get_recursion_limit(krate_attrs: &[ast::Attribute], sess: &Session) -> Limit { if let Some(attr) = krate_attrs .iter() .find(|attr| attr.has_name(sym::recursion_limit) && attr.value_str().is_none()) { // This is here mainly to check for using a macro, such as // #![recursion_limit = foo!()]. That is not supported since that // would require expanding this while in the middle of expansion, // which needs to know the limit before expanding. Otherwise, // validation would normally be caught in AstValidator (via // `check_builtin_attribute`), but by the time that runs the macro // is expanded, and it doesn't give an error. validate_attr::emit_fatal_malformed_builtin_attribute( &sess.parse_sess, attr, sym::recursion_limit, ); } rustc_middle::middle::limits::get_recursion_limit(krate_attrs, sess) }