| use crate::interface::{Compiler, Result}; |
| use crate::util; |
| use crate::proc_macro_decls; |
| |
| use log::{info, warn, log_enabled}; |
| use rustc::dep_graph::DepGraph; |
| use rustc::hir; |
| use rustc::hir::lowering::lower_crate; |
| use rustc::hir::def_id::{CrateNum, LOCAL_CRATE}; |
| use rustc::lint; |
| use rustc::middle::{self, reachable, resolve_lifetime, stability}; |
| use rustc::middle::cstore::CrateStore; |
| use rustc::ty::{self, AllArenas, Resolutions, TyCtxt, GlobalCtxt}; |
| use rustc::ty::steal::Steal; |
| use rustc::traits; |
| use rustc::util::common::{time, ErrorReported}; |
| use rustc::session::Session; |
| use rustc::session::config::{self, CrateType, Input, OutputFilenames, OutputType}; |
| use rustc::session::search_paths::PathKind; |
| use rustc_ast_borrowck as borrowck; |
| use rustc_codegen_ssa::back::link::emit_metadata; |
| use rustc_codegen_utils::codegen_backend::CodegenBackend; |
| use rustc_codegen_utils::link::filename_for_metadata; |
| use rustc_data_structures::{box_region_allow_access, declare_box_region_type, parallel}; |
| use rustc_data_structures::sync::{Lrc, ParallelIterator, par_iter}; |
| use rustc_incremental; |
| use rustc_metadata::creader::CrateLoader; |
| use rustc_metadata::cstore::{self, CStore}; |
| use rustc_mir as mir; |
| use rustc_passes::{self, ast_validation, hir_stats, layout_test}; |
| use rustc_plugin as plugin; |
| use rustc_plugin::registry::Registry; |
| use rustc_privacy; |
| use rustc_resolve::{Resolver, ResolverArenas}; |
| use rustc_traits; |
| use rustc_typeck as typeck; |
| use syntax::{self, ast, visit}; |
| use syntax::early_buffered_lints::BufferedEarlyLint; |
| use syntax::ext::base::{NamedSyntaxExtension, ExtCtxt}; |
| use syntax::mut_visit::MutVisitor; |
| use syntax::parse::{self, PResult}; |
| use syntax::util::node_count::NodeCounter; |
| use syntax::symbol::Symbol; |
| use syntax_pos::FileName; |
| use syntax_ext; |
| |
| use rustc_serialize::json; |
| use tempfile::Builder as TempFileBuilder; |
| |
| use std::any::Any; |
| use std::env; |
| use std::ffi::OsString; |
| use std::fs; |
| use std::io::{self, Write}; |
| use std::iter; |
| use std::path::PathBuf; |
| use std::sync::mpsc; |
| use std::cell::RefCell; |
| use std::rc::Rc; |
| |
| pub fn parse<'a>(sess: &'a Session, input: &Input) -> PResult<'a, ast::Crate> { |
| sess.diagnostic() |
| .set_continue_after_error(sess.opts.debugging_opts.continue_parse_after_error); |
| sess.profiler(|p| p.start_activity("parsing")); |
| let krate = time(sess, "parsing", || match *input { |
| Input::File(ref file) => parse::parse_crate_from_file(file, &sess.parse_sess), |
| Input::Str { |
| ref input, |
| ref name, |
| } => parse::parse_crate_from_source_str(name.clone(), input.clone(), &sess.parse_sess), |
| })?; |
| sess.profiler(|p| p.end_activity("parsing")); |
| |
| sess.diagnostic().set_continue_after_error(true); |
| |
| if sess.opts.debugging_opts.ast_json_noexpand { |
| println!("{}", json::as_json(&krate)); |
| } |
| |
| if sess.opts.debugging_opts.input_stats { |
| println!( |
| "Lines of code: {}", |
| sess.source_map().count_lines() |
| ); |
| println!("Pre-expansion node count: {}", count_nodes(&krate)); |
| } |
| |
| if let Some(ref s) = sess.opts.debugging_opts.show_span { |
| syntax::show_span::run(sess.diagnostic(), s, &krate); |
| } |
| |
| if sess.opts.debugging_opts.hir_stats { |
| hir_stats::print_ast_stats(&krate, "PRE EXPANSION AST STATS"); |
| } |
| |
| Ok(krate) |
| } |
| |
| fn count_nodes(krate: &ast::Crate) -> usize { |
| let mut counter = NodeCounter::new(); |
| visit::walk_crate(&mut counter, krate); |
| counter.count |
| } |
| |
| declare_box_region_type!( |
| pub BoxedResolver, |
| for(), |
| (&mut Resolver<'_>) -> (Result<ast::Crate>, ExpansionResult) |
| ); |
| |
| /// Runs the "early phases" of the compiler: initial `cfg` processing, |
| /// loading compiler plugins (including those from `addl_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. |
| /// |
| /// Returns `None` if we're aborting after handling -W help. |
| pub fn configure_and_expand( |
| sess: Lrc<Session>, |
| cstore: Lrc<CStore>, |
| krate: ast::Crate, |
| crate_name: &str, |
| plugin_info: PluginInfo, |
| ) -> Result<(ast::Crate, BoxedResolver)> { |
| // Currently, we ignore the name resolution data structures for the purposes of dependency |
| // tracking. Instead we will run name resolution and include its output in the hash of each |
| // item, much like we do for macro expansion. In other words, the hash reflects not just |
| // its contents but the results of name resolution on those contents. Hopefully we'll push |
| // this back at some point. |
| let crate_name = crate_name.to_string(); |
| let (result, resolver) = BoxedResolver::new(static move || { |
| let sess = &*sess; |
| let mut crate_loader = CrateLoader::new(sess, &*cstore, &crate_name); |
| let resolver_arenas = Resolver::arenas(); |
| let res = configure_and_expand_inner( |
| sess, |
| &*cstore, |
| krate, |
| &crate_name, |
| &resolver_arenas, |
| &mut crate_loader, |
| plugin_info, |
| ); |
| let mut resolver = match res { |
| Err(v) => { |
| yield BoxedResolver::initial_yield(Err(v)); |
| panic!() |
| } |
| Ok((krate, resolver)) => { |
| yield BoxedResolver::initial_yield(Ok(krate)); |
| resolver |
| } |
| }; |
| box_region_allow_access!(for(), (&mut Resolver<'_>), (&mut resolver)); |
| ExpansionResult::from_owned_resolver(resolver) |
| }); |
| result.map(|k| (k, resolver)) |
| } |
| |
| pub struct ExpansionResult { |
| pub defs: Steal<hir::map::Definitions>, |
| pub resolutions: Steal<Resolutions>, |
| } |
| |
| impl ExpansionResult { |
| fn from_owned_resolver( |
| resolver: Resolver<'_>, |
| ) -> Self { |
| ExpansionResult { |
| defs: Steal::new(resolver.definitions), |
| resolutions: Steal::new(Resolutions { |
| export_map: resolver.export_map, |
| trait_map: resolver.trait_map, |
| glob_map: resolver.glob_map, |
| maybe_unused_trait_imports: resolver.maybe_unused_trait_imports, |
| maybe_unused_extern_crates: resolver.maybe_unused_extern_crates, |
| extern_prelude: resolver.extern_prelude.iter().map(|(ident, entry)| { |
| (ident.name, entry.introduced_by_item) |
| }).collect(), |
| }), |
| } |
| } |
| |
| pub fn from_resolver_ref( |
| resolver: &Resolver<'_>, |
| ) -> Self { |
| ExpansionResult { |
| defs: Steal::new(resolver.definitions.clone()), |
| resolutions: Steal::new(Resolutions { |
| export_map: resolver.export_map.clone(), |
| trait_map: resolver.trait_map.clone(), |
| glob_map: resolver.glob_map.clone(), |
| maybe_unused_trait_imports: resolver.maybe_unused_trait_imports.clone(), |
| maybe_unused_extern_crates: resolver.maybe_unused_extern_crates.clone(), |
| extern_prelude: resolver.extern_prelude.iter().map(|(ident, entry)| { |
| (ident.name, entry.introduced_by_item) |
| }).collect(), |
| }), |
| } |
| } |
| } |
| |
| impl BoxedResolver { |
| pub fn to_expansion_result( |
| resolver: Rc<RefCell<BoxedResolver>>, |
| ) -> ExpansionResult { |
| match Rc::try_unwrap(resolver) { |
| Ok(resolver) => resolver.into_inner().complete(), |
| Err(resolver) => { |
| let resolver = &*resolver; |
| resolver.borrow_mut().access(|resolver| { |
| ExpansionResult::from_resolver_ref(resolver) |
| }) |
| } |
| } |
| } |
| } |
| |
| pub struct PluginInfo { |
| syntax_exts: Vec<NamedSyntaxExtension>, |
| } |
| |
| pub fn register_plugins<'a>( |
| compiler: &Compiler, |
| sess: &'a Session, |
| cstore: &'a CStore, |
| mut krate: ast::Crate, |
| crate_name: &str, |
| ) -> Result<(ast::Crate, PluginInfo)> { |
| krate = time(sess, "attributes injection", || { |
| syntax_ext::cmdline_attrs::inject( |
| krate, &sess.parse_sess, &sess.opts.debugging_opts.crate_attr |
| ) |
| }); |
| |
| let (krate, features) = syntax::config::features( |
| krate, |
| &sess.parse_sess, |
| sess.edition(), |
| &sess.opts.debugging_opts.allow_features, |
| ); |
| // 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.crate_types.set(crate_types); |
| |
| let disambiguator = util::compute_crate_disambiguator(sess); |
| sess.crate_disambiguator.set(disambiguator); |
| rustc_incremental::prepare_session_directory(sess, &crate_name, disambiguator); |
| |
| if sess.opts.incremental.is_some() { |
| time(sess, "garbage collect incremental cache directory", || { |
| if let Err(e) = rustc_incremental::garbage_collect_session_directories(sess) { |
| warn!( |
| "Error while trying to garbage collect incremental \ |
| compilation cache directory: {}", |
| e |
| ); |
| } |
| }); |
| } |
| |
| // If necessary, compute the dependency graph (in the background). |
| compiler.dep_graph_future().ok(); |
| |
| time(sess, "recursion limit", || { |
| middle::recursion_limit::update_limits(sess, &krate); |
| }); |
| |
| let registrars = time(sess, "plugin loading", || { |
| plugin::load::load_plugins( |
| sess, |
| &cstore, |
| &krate, |
| crate_name, |
| Some(sess.opts.debugging_opts.extra_plugins.clone()), |
| ) |
| }); |
| |
| let mut registry = Registry::new(sess, krate.span); |
| |
| time(sess, "plugin registration", || { |
| for registrar in registrars { |
| registry.args_hidden = Some(registrar.args); |
| (registrar.fun)(&mut registry); |
| } |
| }); |
| |
| let Registry { |
| syntax_exts, |
| early_lint_passes, |
| late_lint_passes, |
| lint_groups, |
| llvm_passes, |
| attributes, |
| .. |
| } = registry; |
| |
| let mut ls = sess.lint_store.borrow_mut(); |
| for pass in early_lint_passes { |
| ls.register_early_pass(Some(sess), true, false, pass); |
| } |
| for pass in late_lint_passes { |
| ls.register_late_pass(Some(sess), true, false, false, pass); |
| } |
| |
| for (name, (to, deprecated_name)) in lint_groups { |
| ls.register_group(Some(sess), true, name, deprecated_name, to); |
| } |
| |
| *sess.plugin_llvm_passes.borrow_mut() = llvm_passes; |
| *sess.plugin_attributes.borrow_mut() = attributes; |
| |
| Ok((krate, PluginInfo { syntax_exts })) |
| } |
| |
| fn configure_and_expand_inner<'a>( |
| sess: &'a Session, |
| cstore: &'a CStore, |
| mut krate: ast::Crate, |
| crate_name: &str, |
| resolver_arenas: &'a ResolverArenas<'a>, |
| crate_loader: &'a mut CrateLoader<'a>, |
| plugin_info: PluginInfo, |
| ) -> Result<(ast::Crate, Resolver<'a>)> { |
| time(sess, "pre ast expansion lint checks", || { |
| lint::check_ast_crate( |
| sess, |
| &krate, |
| true, |
| rustc_lint::BuiltinCombinedPreExpansionLintPass::new()); |
| }); |
| |
| let mut resolver = Resolver::new( |
| sess, |
| cstore, |
| &krate, |
| crate_name, |
| crate_loader, |
| &resolver_arenas, |
| ); |
| syntax_ext::register_builtin_macros(&mut resolver, sess.edition()); |
| |
| krate = time(sess, "crate injection", || { |
| let alt_std_name = sess.opts.alt_std_name.as_ref().map(|s| Symbol::intern(s)); |
| let (krate, name) = syntax_ext::standard_library_imports::inject( |
| krate, |
| &mut resolver, |
| &sess.parse_sess, |
| alt_std_name, |
| ); |
| if let Some(name) = name { |
| sess.parse_sess.injected_crate_name.set(name); |
| } |
| krate |
| }); |
| |
| syntax_ext::plugin_macro_defs::inject( |
| &mut krate, &mut resolver, plugin_info.syntax_exts, sess.edition() |
| ); |
| |
| // Expand all macros |
| sess.profiler(|p| p.start_activity("macro expansion")); |
| krate = time(sess, "expansion", || { |
| // 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 cfg = syntax::ext::expand::ExpansionConfig { |
| features: Some(&features), |
| recursion_limit: *sess.recursion_limit.get(), |
| trace_mac: sess.opts.debugging_opts.trace_macros, |
| should_test: sess.opts.test, |
| ..syntax::ext::expand::ExpansionConfig::default(crate_name.to_string()) |
| }; |
| |
| let mut ecx = ExtCtxt::new(&sess.parse_sess, cfg, &mut resolver); |
| |
| // Expand macros now! |
| let krate = time(sess, "expand crate", || { |
| ecx.monotonic_expander().expand_crate(krate) |
| }); |
| |
| // The rest is error reporting |
| |
| time(sess, "check unused macros", || { |
| ecx.check_unused_macros(); |
| }); |
| |
| let mut missing_fragment_specifiers: Vec<_> = ecx.parse_sess |
| .missing_fragment_specifiers |
| .borrow() |
| .iter() |
| .cloned() |
| .collect(); |
| missing_fragment_specifiers.sort(); |
| |
| for span in missing_fragment_specifiers { |
| let lint = lint::builtin::MISSING_FRAGMENT_SPECIFIER; |
| let msg = "missing fragment specifier"; |
| sess.buffer_lint(lint, ast::CRATE_NODE_ID, span, msg); |
| } |
| if cfg!(windows) { |
| env::set_var("PATH", &old_path); |
| } |
| krate |
| }); |
| sess.profiler(|p| p.end_activity("macro expansion")); |
| |
| time(sess, "maybe building test harness", || { |
| syntax_ext::test_harness::inject( |
| &sess.parse_sess, |
| &mut resolver, |
| sess.opts.test, |
| &mut krate, |
| sess.diagnostic(), |
| &sess.features_untracked(), |
| ) |
| }); |
| |
| // If we're actually rustdoc then there's no need to actually compile |
| // anything, so switch everything to just looping |
| if sess.opts.actually_rustdoc { |
| util::ReplaceBodyWithLoop::new(sess).visit_crate(&mut krate); |
| } |
| |
| let has_proc_macro_decls = time(sess, "AST validation", || { |
| ast_validation::check_crate(sess, &krate) |
| }); |
| |
| |
| let crate_types = sess.crate_types.borrow(); |
| let is_proc_macro_crate = crate_types.contains(&config::CrateType::ProcMacro); |
| |
| // For backwards compatibility, we don't try to run proc macro injection |
| // if rustdoc is run on a proc macro crate without '--crate-type proc-macro' being |
| // specified. This should only affect users who manually invoke 'rustdoc', as |
| // 'cargo doc' will automatically pass the proper '--crate-type' flags. |
| // However, we do emit a warning, to let such users know that they should |
| // start passing '--crate-type proc-macro' |
| if has_proc_macro_decls && sess.opts.actually_rustdoc && !is_proc_macro_crate { |
| let mut msg = sess.diagnostic().struct_warn(&"Trying to document proc macro crate \ |
| without passing '--crate-type proc-macro to rustdoc"); |
| |
| msg.warn("The generated documentation may be incorrect"); |
| msg.emit() |
| } else { |
| krate = time(sess, "maybe creating a macro crate", || { |
| let num_crate_types = crate_types.len(); |
| let is_test_crate = sess.opts.test; |
| syntax_ext::proc_macro_harness::inject( |
| &sess.parse_sess, |
| &mut resolver, |
| krate, |
| is_proc_macro_crate, |
| has_proc_macro_decls, |
| is_test_crate, |
| num_crate_types, |
| sess.diagnostic(), |
| ) |
| }); |
| } |
| |
| // Done with macro expansion! |
| |
| if sess.opts.debugging_opts.input_stats { |
| println!("Post-expansion node count: {}", count_nodes(&krate)); |
| } |
| |
| if sess.opts.debugging_opts.hir_stats { |
| hir_stats::print_ast_stats(&krate, "POST EXPANSION AST STATS"); |
| } |
| |
| if sess.opts.debugging_opts.ast_json { |
| println!("{}", json::as_json(&krate)); |
| } |
| |
| time(sess, "name resolution", || { |
| resolver.resolve_crate(&krate); |
| }); |
| |
| // Needs to go *after* expansion to be able to check the results of macro expansion. |
| time(sess, "complete gated feature checking", || { |
| syntax::feature_gate::check_crate( |
| &krate, |
| &sess.parse_sess, |
| &sess.features_untracked(), |
| sess.opts.unstable_features, |
| ); |
| }); |
| |
| // 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 BufferedEarlyLint{id, span, msg, lint_id} in buffered_lints.drain(..) { |
| let lint = lint::Lint::from_parser_lint_id(lint_id); |
| sess.buffer_lint(lint, id, span, &msg); |
| } |
| }); |
| |
| Ok((krate, resolver)) |
| } |
| |
| pub fn lower_to_hir( |
| sess: &Session, |
| cstore: &CStore, |
| resolver: &mut Resolver<'_>, |
| dep_graph: &DepGraph, |
| krate: &ast::Crate, |
| ) -> Result<hir::map::Forest> { |
| // Lower ast -> hir |
| let hir_forest = time(sess, "lowering ast -> hir", || { |
| let hir_crate = lower_crate(sess, cstore, &dep_graph, &krate, resolver); |
| |
| if sess.opts.debugging_opts.hir_stats { |
| hir_stats::print_hir_stats(&hir_crate); |
| } |
| |
| hir::map::Forest::new(hir_crate, &dep_graph) |
| }); |
| |
| time(sess, "early lint checks", || { |
| lint::check_ast_crate(sess, &krate, false, rustc_lint::BuiltinCombinedEarlyLintPass::new()) |
| }); |
| |
| // Discard hygiene data, which isn't required after lowering to HIR. |
| if !sess.opts.debugging_opts.keep_hygiene_data { |
| syntax::ext::hygiene::clear_syntax_context_map(); |
| } |
| |
| Ok(hir_forest) |
| } |
| |
| // Returns all the paths that correspond to generated files. |
| fn generated_output_paths( |
| sess: &Session, |
| outputs: &OutputFilenames, |
| exact_name: bool, |
| crate_name: &str, |
| ) -> Vec<PathBuf> { |
| 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.borrow().iter() { |
| let p = ::rustc_codegen_utils::link::filename_for_input( |
| sess, |
| *crate_type, |
| crate_name, |
| outputs, |
| ); |
| out_filenames.push(p); |
| }, |
| OutputType::DepInfo if sess.opts.debugging_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<F, T>(output_paths: &[PathBuf], f: F) -> Option<T> |
| where |
| F: Fn(&PathBuf) -> Option<T>, |
| { |
| 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: &PathBuf) -> 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<PathBuf> { |
| let check = |output_path: &PathBuf| { |
| if output_path.is_dir() { |
| Some(output_path.clone()) |
| } else { |
| None |
| } |
| }; |
| check_output(output_paths, check) |
| } |
| |
| fn escape_dep_filename(filename: &FileName) -> String { |
| // Apparently clang and gcc *only* escape spaces: |
| // http://llvm.org/klaus/clang/commit/9d50634cfc268ecc9a7250226dd5ca0e945240d4 |
| filename.to_string().replace(" ", "\\ ") |
| } |
| |
| fn write_out_deps(compiler: &Compiler, outputs: &OutputFilenames, out_filenames: &[PathBuf]) { |
| let sess = &compiler.sess; |
| // 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<()> { |
| // Build a list of files used to compile the output and |
| // write Makefile-compatible dependency rules |
| let mut files: Vec<String> = sess.source_map() |
| .files() |
| .iter() |
| .filter(|fmap| fmap.is_real_file()) |
| .filter(|fmap| !fmap.is_imported()) |
| .map(|fmap| escape_dep_filename(&fmap.unmapped_path.as_ref().unwrap_or(&fmap.name))) |
| .collect(); |
| |
| if sess.binary_dep_depinfo() { |
| for cnum in compiler.cstore.crates_untracked() { |
| let metadata = compiler.cstore.crate_data_as_rc_any(cnum); |
| let metadata = metadata.downcast_ref::<cstore::CrateMetadata>().unwrap(); |
| if let Some((path, _)) = &metadata.source.dylib { |
| files.push(escape_dep_filename(&FileName::Real(path.clone()))); |
| } |
| if let Some((path, _)) = &metadata.source.rlib { |
| files.push(escape_dep_filename(&FileName::Real(path.clone()))); |
| } |
| if let Some((path, _)) = &metadata.source.rmeta { |
| files.push(escape_dep_filename(&FileName::Real(path.clone()))); |
| } |
| } |
| } |
| |
| let mut file = 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)?; |
| } |
| Ok(()) |
| })(); |
| |
| match result { |
| Ok(_) => { |
| if sess.opts.json_artifact_notifications { |
| sess.parse_sess.span_diagnostic |
| .emit_artifact_notification(&deps_filename, "dep-info"); |
| } |
| }, |
| Err(e) => { |
| sess.fatal(&format!( |
| "error writing dependencies to `{}`: {}", |
| deps_filename.display(), |
| e |
| )) |
| } |
| } |
| } |
| |
| pub fn prepare_outputs( |
| sess: &Session, |
| compiler: &Compiler, |
| krate: &ast::Crate, |
| crate_name: &str |
| ) -> Result<OutputFilenames> { |
| // FIXME: rustdoc passes &[] instead of &krate.attrs here |
| let outputs = util::build_output_filenames( |
| &compiler.input, |
| &compiler.output_dir, |
| &compiler.output_file, |
| &krate.attrs, |
| sess |
| ); |
| |
| let output_paths = generated_output_paths( |
| sess, |
| &outputs, |
| compiler.output_file.is_some(), |
| &crate_name, |
| ); |
| |
| // Ensure the source file isn't accidentally overwritten during compilation. |
| if let Some(ref input_path) = compiler.input_path { |
| if sess.opts.will_create_output_file() { |
| if output_contains_path(&output_paths, input_path) { |
| sess.err(&format!( |
| "the input file \"{}\" would be overwritten by the generated \ |
| executable", |
| input_path.display() |
| )); |
| return Err(ErrorReported); |
| } |
| if let Some(dir_path) = output_conflicts_with_dir(&output_paths) { |
| sess.err(&format!( |
| "the generated executable for the input file \"{}\" conflicts with the \ |
| existing directory \"{}\"", |
| input_path.display(), |
| dir_path.display() |
| )); |
| return Err(ErrorReported); |
| } |
| } |
| } |
| |
| write_out_deps(compiler, &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) = compiler.output_dir { |
| if fs::create_dir_all(dir).is_err() { |
| sess.err("failed to find or create the directory specified by --out-dir"); |
| return Err(ErrorReported); |
| } |
| } |
| } |
| |
| Ok(outputs) |
| } |
| |
| pub fn default_provide(providers: &mut ty::query::Providers<'_>) { |
| providers.analysis = analysis; |
| proc_macro_decls::provide(providers); |
| plugin::build::provide(providers); |
| hir::provide(providers); |
| borrowck::provide(providers); |
| mir::provide(providers); |
| reachable::provide(providers); |
| resolve_lifetime::provide(providers); |
| rustc_privacy::provide(providers); |
| typeck::provide(providers); |
| ty::provide(providers); |
| traits::provide(providers); |
| stability::provide(providers); |
| middle::intrinsicck::provide(providers); |
| middle::liveness::provide(providers); |
| reachable::provide(providers); |
| rustc_passes::provide(providers); |
| rustc_traits::provide(providers); |
| middle::region::provide(providers); |
| middle::entry::provide(providers); |
| cstore::provide(providers); |
| lint::provide(providers); |
| rustc_lint::provide(providers); |
| } |
| |
| pub fn default_provide_extern(providers: &mut ty::query::Providers<'_>) { |
| cstore::provide_extern(providers); |
| } |
| |
| declare_box_region_type!( |
| pub BoxedGlobalCtxt, |
| for('tcx), |
| (&'tcx GlobalCtxt<'tcx>) -> ((), ()) |
| ); |
| |
| impl BoxedGlobalCtxt { |
| pub fn enter<F, R>(&mut self, f: F) -> R |
| where |
| F: for<'tcx> FnOnce(TyCtxt<'tcx>) -> R, |
| { |
| self.access(|gcx| ty::tls::enter_global(gcx, |tcx| f(tcx))) |
| } |
| } |
| |
| pub fn create_global_ctxt( |
| compiler: &Compiler, |
| mut hir_forest: hir::map::Forest, |
| defs: hir::map::Definitions, |
| resolutions: Resolutions, |
| outputs: OutputFilenames, |
| tx: mpsc::Sender<Box<dyn Any + Send>>, |
| crate_name: &str, |
| ) -> BoxedGlobalCtxt { |
| let sess = compiler.session().clone(); |
| let cstore = compiler.cstore.clone(); |
| let codegen_backend = compiler.codegen_backend().clone(); |
| let crate_name = crate_name.to_string(); |
| |
| let ((), result) = BoxedGlobalCtxt::new(static move || { |
| let sess = &*sess; |
| let cstore = &*cstore; |
| |
| let global_ctxt: Option<GlobalCtxt<'_>>; |
| let arenas = AllArenas::new(); |
| |
| // Construct the HIR map |
| let hir_map = time(sess, "indexing hir", || { |
| hir::map::map_crate(sess, cstore, &mut hir_forest, &defs) |
| }); |
| |
| let query_result_on_disk_cache = time(sess, "load query result cache", || { |
| rustc_incremental::load_query_result_cache(sess) |
| }); |
| |
| let mut local_providers = ty::query::Providers::default(); |
| default_provide(&mut local_providers); |
| codegen_backend.provide(&mut local_providers); |
| |
| let mut extern_providers = local_providers; |
| default_provide_extern(&mut extern_providers); |
| codegen_backend.provide_extern(&mut extern_providers); |
| |
| let gcx = TyCtxt::create_global_ctxt( |
| sess, |
| cstore, |
| local_providers, |
| extern_providers, |
| &arenas, |
| resolutions, |
| hir_map, |
| query_result_on_disk_cache, |
| &crate_name, |
| tx, |
| &outputs |
| ); |
| |
| global_ctxt = Some(gcx); |
| let gcx = global_ctxt.as_ref().unwrap(); |
| |
| ty::tls::enter_global(gcx, |tcx| { |
| // Do some initialization of the DepGraph that can only be done with the |
| // tcx available. |
| time(tcx.sess, "dep graph tcx init", || rustc_incremental::dep_graph_tcx_init(tcx)); |
| }); |
| |
| yield BoxedGlobalCtxt::initial_yield(()); |
| box_region_allow_access!(for('tcx), (&'tcx GlobalCtxt<'tcx>), (gcx)); |
| |
| if sess.opts.debugging_opts.query_stats { |
| gcx.queries.print_stats(); |
| } |
| }); |
| |
| result |
| } |
| |
| /// Runs the resolution, type-checking, region checking and other |
| /// miscellaneous analysis passes on the crate. |
| fn analysis(tcx: TyCtxt<'_>, cnum: CrateNum) -> Result<()> { |
| assert_eq!(cnum, LOCAL_CRATE); |
| |
| let sess = tcx.sess; |
| let mut entry_point = None; |
| |
| time(sess, "misc checking 1", || { |
| parallel!({ |
| entry_point = time(sess, "looking for entry point", || { |
| middle::entry::find_entry_point(tcx) |
| }); |
| |
| time(sess, "looking for plugin registrar", || { |
| plugin::build::find_plugin_registrar(tcx) |
| }); |
| |
| time(sess, "looking for derive registrar", || { |
| proc_macro_decls::find(tcx) |
| }); |
| }, { |
| par_iter(&tcx.hir().krate().modules).for_each(|(&module, _)| { |
| tcx.ensure().check_mod_loops(tcx.hir().local_def_id_from_node_id(module)); |
| tcx.ensure().check_mod_attrs(tcx.hir().local_def_id_from_node_id(module)); |
| tcx.ensure().check_mod_unstable_api_usage( |
| tcx.hir().local_def_id_from_node_id(module)); |
| }); |
| }); |
| }); |
| |
| // passes are timed inside typeck |
| typeck::check_crate(tcx)?; |
| |
| time(sess, "misc checking 2", || { |
| parallel!({ |
| time(sess, "rvalue promotion + match checking", || { |
| tcx.par_body_owners(|def_id| { |
| tcx.ensure().const_is_rvalue_promotable_to_static(def_id); |
| tcx.ensure().check_match(def_id); |
| }); |
| }); |
| }, { |
| time(sess, "liveness checking + intrinsic checking", || { |
| par_iter(&tcx.hir().krate().modules).for_each(|(&module, _)| { |
| // 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_mod_liveness(tcx.hir().local_def_id_from_node_id(module)); |
| |
| tcx.ensure().check_mod_intrinsics(tcx.hir().local_def_id_from_node_id(module)); |
| }); |
| }); |
| }); |
| }); |
| |
| time(sess, "borrow checking", || { |
| if tcx.use_ast_borrowck() { |
| borrowck::check_crate(tcx); |
| } |
| }); |
| |
| time(sess, "MIR borrow checking", || { |
| tcx.par_body_owners(|def_id| tcx.ensure().mir_borrowck(def_id)); |
| }); |
| |
| time(sess, "dumping chalk-like clauses", || { |
| rustc_traits::lowering::dump_program_clauses(tcx); |
| }); |
| |
| time(sess, "MIR effect checking", || { |
| for def_id in tcx.body_owners() { |
| mir::transform::check_unsafety::check_unsafety(tcx, def_id) |
| } |
| }); |
| |
| time(sess, "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 compile-fail tests (basically, |
| // lint warnings and so on -- kindck used to do this abort, but |
| // kindck is gone now). -nmatsakis |
| if sess.has_errors() { |
| return Err(ErrorReported); |
| } |
| |
| time(sess, "misc checking 3", || { |
| parallel!({ |
| time(sess, "privacy access levels", || { |
| tcx.ensure().privacy_access_levels(LOCAL_CRATE); |
| }); |
| parallel!({ |
| time(sess, "private in public", || { |
| tcx.ensure().check_private_in_public(LOCAL_CRATE); |
| }); |
| }, { |
| time(sess, "death checking", || middle::dead::check_crate(tcx)); |
| }, { |
| time(sess, "unused lib feature checking", || { |
| stability::check_unused_or_stable_features(tcx) |
| }); |
| }, { |
| time(sess, "lint checking", || { |
| lint::check_crate(tcx, || rustc_lint::BuiltinCombinedLateLintPass::new()); |
| }); |
| }); |
| }, { |
| time(sess, "privacy checking modules", || { |
| par_iter(&tcx.hir().krate().modules).for_each(|(&module, _)| { |
| tcx.ensure().check_mod_privacy(tcx.hir().local_def_id_from_node_id(module)); |
| }); |
| }); |
| }); |
| }); |
| |
| Ok(()) |
| } |
| |
| fn encode_and_write_metadata( |
| tcx: TyCtxt<'_>, |
| outputs: &OutputFilenames, |
| ) -> (middle::cstore::EncodedMetadata, bool) { |
| #[derive(PartialEq, Eq, PartialOrd, Ord)] |
| enum MetadataKind { |
| None, |
| Uncompressed, |
| Compressed |
| } |
| |
| let metadata_kind = tcx.sess.crate_types.borrow().iter().map(|ty| { |
| match *ty { |
| CrateType::Executable | |
| CrateType::Staticlib | |
| CrateType::Cdylib => MetadataKind::None, |
| |
| CrateType::Rlib => MetadataKind::Uncompressed, |
| |
| CrateType::Dylib | |
| CrateType::ProcMacro => MetadataKind::Compressed, |
| } |
| }).max().unwrap_or(MetadataKind::None); |
| |
| let metadata = match metadata_kind { |
| MetadataKind::None => middle::cstore::EncodedMetadata::new(), |
| MetadataKind::Uncompressed | |
| MetadataKind::Compressed => tcx.encode_metadata(), |
| }; |
| |
| let need_metadata_file = tcx.sess.opts.output_types.contains_key(&OutputType::Metadata); |
| if need_metadata_file { |
| let crate_name = &tcx.crate_name(LOCAL_CRATE).as_str(); |
| let out_filename = filename_for_metadata(tcx.sess, crate_name, outputs); |
| // To avoid races with another rustc process scanning the output directory, |
| // we need to write the file somewhere else and atomically move it to its |
| // final destination, with an `fs::rename` call. In order for the rename to |
| // always succeed, the temporary file needs to be on the same filesystem, |
| // which is why we create it inside the output directory specifically. |
| let metadata_tmpdir = TempFileBuilder::new() |
| .prefix("rmeta") |
| .tempdir_in(out_filename.parent().unwrap()) |
| .unwrap_or_else(|err| { |
| tcx.sess.fatal(&format!("couldn't create a temp dir: {}", err)) |
| }); |
| let metadata_filename = emit_metadata(tcx.sess, &metadata, &metadata_tmpdir); |
| if let Err(e) = fs::rename(&metadata_filename, &out_filename) { |
| tcx.sess.fatal(&format!("failed to write {}: {}", out_filename.display(), e)); |
| } |
| if tcx.sess.opts.json_artifact_notifications { |
| tcx.sess.parse_sess.span_diagnostic |
| .emit_artifact_notification(&out_filename, "metadata"); |
| } |
| } |
| |
| let need_metadata_module = metadata_kind == MetadataKind::Compressed; |
| |
| (metadata, need_metadata_module) |
| } |
| |
| /// 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>, |
| rx: mpsc::Receiver<Box<dyn Any + Send>>, |
| outputs: &OutputFilenames, |
| ) -> Box<dyn Any> { |
| if log_enabled!(::log::Level::Info) { |
| println!("Pre-codegen"); |
| tcx.print_debug_stats(); |
| } |
| |
| time(tcx.sess, "resolving dependency formats", || { |
| middle::dependency_format::calculate(tcx) |
| }); |
| |
| let (metadata, need_metadata_module) = time(tcx.sess, "metadata encoding and writing", || { |
| encode_and_write_metadata(tcx, outputs) |
| }); |
| |
| tcx.sess.profiler(|p| p.start_activity("codegen crate")); |
| let codegen = time(tcx.sess, "codegen", move || { |
| codegen_backend.codegen_crate(tcx, metadata, need_metadata_module, rx) |
| }); |
| tcx.sess.profiler(|p| p.end_activity("codegen crate")); |
| |
| if log_enabled!(::log::Level::Info) { |
| println!("Post-codegen"); |
| tcx.print_debug_stats(); |
| } |
| |
| if tcx.sess.opts.output_types.contains_key(&OutputType::Mir) { |
| if let Err(e) = mir::transform::dump_mir::emit_mir(tcx, outputs) { |
| tcx.sess.err(&format!("could not emit MIR: {}", e)); |
| tcx.sess.abort_if_errors(); |
| } |
| } |
| |
| codegen |
| } |
