// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. use rustc::dep_graph::DepGraph; use rustc::hir::{self, map as hir_map}; use rustc::hir::lowering::lower_crate; use rustc::ich::Fingerprint; use rustc_data_structures::stable_hasher::StableHasher; use rustc_mir as mir; use rustc::session::{Session, CompileResult, CrateDisambiguator}; use rustc::session::CompileIncomplete; use rustc::session::config::{self, Input, OutputFilenames, OutputType}; use rustc::session::search_paths::PathKind; use rustc::lint; use rustc::middle::{self, stability, reachable}; use rustc::middle::cstore::CrateStore; use rustc::middle::privacy::AccessLevels; use rustc::ty::{self, TyCtxt, Resolutions, GlobalArenas}; use rustc::traits; use rustc::util::common::{ErrorReported, time}; use rustc_allocator as allocator; use rustc_borrowck as borrowck; use rustc_incremental; use rustc_resolve::{MakeGlobMap, Resolver}; use rustc_metadata::creader::CrateLoader; use rustc_metadata::cstore::{self, CStore}; use rustc_trans as trans; use rustc_trans_utils::trans_crate::TransCrate; use rustc_typeck as typeck; use rustc_privacy; use rustc_plugin::registry::Registry; use rustc_plugin as plugin; use rustc_passes::{self, ast_validation, no_asm, loops, consts, static_recursion, hir_stats}; use rustc_const_eval::{self, check_match}; use super::Compilation; use ::DefaultTransCrate; use serialize::json; use std::any::Any; use std::env; use std::ffi::{OsString, OsStr}; use std::fs; use std::io::{self, Write}; use std::iter; use std::path::{Path, PathBuf}; use std::rc::Rc; use std::sync::mpsc; use syntax::{ast, diagnostics, visit}; use syntax::attr; use syntax::ext::base::ExtCtxt; use syntax::fold::Folder; use syntax::parse::{self, PResult}; use syntax::util::node_count::NodeCounter; use syntax; use syntax_ext; use arena::DroplessArena; use derive_registrar; use pretty::ReplaceBodyWithLoop; use profile; pub fn compile_input(sess: &Session, cstore: &CStore, input: &Input, outdir: &Option, output: &Option, addl_plugins: Option>, control: &CompileController) -> CompileResult { use rustc::session::config::CrateType; macro_rules! controller_entry_point { ($point: ident, $tsess: expr, $make_state: expr, $phase_result: expr) => {{ let state = &mut $make_state; let phase_result: &CompileResult = &$phase_result; if phase_result.is_ok() || control.$point.run_callback_on_error { (control.$point.callback)(state); } if control.$point.stop == Compilation::Stop { // FIXME: shouldn't this return Err(CompileIncomplete::Stopped) // if there are no errors? return $tsess.compile_status(); } }} } if cfg!(not(feature="llvm")) { for cty in sess.opts.crate_types.iter() { match *cty { CrateType::CrateTypeRlib | CrateType::CrateTypeDylib | CrateType::CrateTypeExecutable => {}, _ => { sess.parse_sess.span_diagnostic.warn( &format!("LLVM unsupported, so output type {} is not supported", cty) ); }, } } sess.abort_if_errors(); } if sess.profile_queries() { profile::begin(); } // We need nested scopes here, because the intermediate results can keep // large chunks of memory alive and we want to free them as soon as // possible to keep the peak memory usage low let (outputs, trans, dep_graph) = { let krate = match phase_1_parse_input(control, sess, input) { Ok(krate) => krate, Err(mut parse_error) => { parse_error.emit(); return Err(CompileIncomplete::Errored(ErrorReported)); } }; let (krate, registry) = { let mut compile_state = CompileState::state_after_parse(input, sess, outdir, output, krate, &cstore); controller_entry_point!(after_parse, sess, compile_state, Ok(())); (compile_state.krate.unwrap(), compile_state.registry) }; let outputs = build_output_filenames(input, outdir, output, &krate.attrs, sess); let crate_name = ::rustc_trans_utils::link::find_crate_name(Some(sess), &krate.attrs, input); let ExpansionResult { expanded_crate, defs, analysis, resolutions, mut hir_forest } = { phase_2_configure_and_expand( sess, &cstore, krate, registry, &crate_name, addl_plugins, control.make_glob_map, |expanded_crate| { let mut state = CompileState::state_after_expand( input, sess, outdir, output, &cstore, expanded_crate, &crate_name, ); controller_entry_point!(after_expand, sess, state, Ok(())); Ok(()) } )? }; write_out_deps(sess, &outputs, &crate_name); if sess.opts.output_types.contains_key(&OutputType::DepInfo) && sess.opts.output_types.keys().count() == 1 { return Ok(()) } let arena = DroplessArena::new(); let arenas = GlobalArenas::new(); // Construct the HIR map let hir_map = time(sess.time_passes(), "indexing hir", || hir_map::map_crate(sess, cstore, &mut hir_forest, &defs)); { let _ignore = hir_map.dep_graph.in_ignore(); controller_entry_point!(after_hir_lowering, sess, CompileState::state_after_hir_lowering(input, sess, outdir, output, &arena, &arenas, &cstore, &hir_map, &analysis, &resolutions, &expanded_crate, &hir_map.krate(), &outputs, &crate_name), Ok(())); } time(sess.time_passes(), "attribute checking", || { hir::check_attr::check_crate(sess, &expanded_crate); }); let opt_crate = if control.keep_ast { Some(&expanded_crate) } else { drop(expanded_crate); None }; phase_3_run_analysis_passes(control, sess, cstore, hir_map, analysis, resolutions, &arena, &arenas, &crate_name, &outputs, |tcx, analysis, rx, result| { { // Eventually, we will want to track plugins. let _ignore = tcx.dep_graph.in_ignore(); let mut state = CompileState::state_after_analysis(input, sess, outdir, output, opt_crate, tcx.hir.krate(), &analysis, tcx, &crate_name); (control.after_analysis.callback)(&mut state); if control.after_analysis.stop == Compilation::Stop { return result.and_then(|_| Err(CompileIncomplete::Stopped)); } } result?; if log_enabled!(::log::LogLevel::Info) { println!("Pre-trans"); tcx.print_debug_stats(); } let trans = phase_4_translate_to_llvm::(tcx, rx); if log_enabled!(::log::LogLevel::Info) { println!("Post-trans"); 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) { sess.err(&format!("could not emit MIR: {}", e)); sess.abort_if_errors(); } } Ok((outputs.clone(), trans, tcx.dep_graph.clone())) })?? }; if sess.opts.debugging_opts.print_type_sizes { sess.code_stats.borrow().print_type_sizes(); } let (phase5_result, trans) = phase_5_run_llvm_passes::(sess, &dep_graph, trans); controller_entry_point!(after_llvm, sess, CompileState::state_after_llvm(input, sess, outdir, output, &trans), phase5_result); phase5_result?; // Run the linker on any artifacts that resulted from the LLVM run. // This should produce either a finished executable or library. time(sess.time_passes(), "linking", || { DefaultTransCrate::link_binary(sess, &trans, &outputs) }); // Now that we won't touch anything in the incremental compilation directory // any more, we can finalize it (which involves renaming it) #[cfg(feature="llvm")] rustc_incremental::finalize_session_directory(sess, trans.link.crate_hash); if sess.opts.debugging_opts.perf_stats { sess.print_perf_stats(); } controller_entry_point!( compilation_done, sess, CompileState::state_when_compilation_done(input, sess, outdir, output), Ok(()) ); Ok(()) } fn keep_hygiene_data(sess: &Session) -> bool { sess.opts.debugging_opts.keep_hygiene_data } /// The name used for source code that doesn't originate in a file /// (e.g. source from stdin or a string) pub fn anon_src() -> String { "".to_string() } pub fn source_name(input: &Input) -> String { match *input { // FIXME (#9639): This needs to handle non-utf8 paths Input::File(ref ifile) => ifile.to_str().unwrap().to_string(), Input::Str { ref name, .. } => name.clone(), } } /// CompileController is used to customize compilation, it allows compilation to /// be stopped and/or to call arbitrary code at various points in compilation. /// It also allows for various flags to be set to influence what information gets /// collected during compilation. /// /// This is a somewhat higher level controller than a Session - the Session /// controls what happens in each phase, whereas the CompileController controls /// whether a phase is run at all and whether other code (from outside the /// compiler) is run between phases. /// /// Note that if compilation is set to stop and a callback is provided for a /// given entry point, the callback is called before compilation is stopped. /// /// Expect more entry points to be added in the future. pub struct CompileController<'a> { pub after_parse: PhaseController<'a>, pub after_expand: PhaseController<'a>, pub after_hir_lowering: PhaseController<'a>, pub after_analysis: PhaseController<'a>, pub after_llvm: PhaseController<'a>, pub compilation_done: PhaseController<'a>, // FIXME we probably want to group the below options together and offer a // better API, rather than this ad-hoc approach. pub make_glob_map: MakeGlobMap, // Whether the compiler should keep the ast beyond parsing. pub keep_ast: bool, // -Zcontinue-parse-after-error pub continue_parse_after_error: bool, /// Allows overriding default rustc query providers, /// after `default_provide` has installed them. pub provide: Box, /// Same as `provide`, but only for non-local crates, /// applied after `default_provide_extern`. pub provide_extern: Box, } impl<'a> CompileController<'a> { pub fn basic() -> CompileController<'a> { CompileController { after_parse: PhaseController::basic(), after_expand: PhaseController::basic(), after_hir_lowering: PhaseController::basic(), after_analysis: PhaseController::basic(), after_llvm: PhaseController::basic(), compilation_done: PhaseController::basic(), make_glob_map: MakeGlobMap::No, keep_ast: false, continue_parse_after_error: false, provide: box |_| {}, provide_extern: box |_| {}, } } } pub struct PhaseController<'a> { pub stop: Compilation, // If true then the compiler will try to run the callback even if the phase // ends with an error. Note that this is not always possible. pub run_callback_on_error: bool, pub callback: Box, } impl<'a> PhaseController<'a> { pub fn basic() -> PhaseController<'a> { PhaseController { stop: Compilation::Continue, run_callback_on_error: false, callback: box |_| {}, } } } /// State that is passed to a callback. What state is available depends on when /// during compilation the callback is made. See the various constructor methods /// (`state_*`) in the impl to see which data is provided for any given entry point. pub struct CompileState<'a, 'tcx: 'a> { pub input: &'a Input, pub session: &'tcx Session, pub krate: Option, pub registry: Option>, pub cstore: Option<&'tcx CStore>, pub crate_name: Option<&'a str>, pub output_filenames: Option<&'a OutputFilenames>, pub out_dir: Option<&'a Path>, pub out_file: Option<&'a Path>, pub arena: Option<&'tcx DroplessArena>, pub arenas: Option<&'tcx GlobalArenas<'tcx>>, pub expanded_crate: Option<&'a ast::Crate>, pub hir_crate: Option<&'a hir::Crate>, pub hir_map: Option<&'a hir_map::Map<'tcx>>, pub resolutions: Option<&'a Resolutions>, pub analysis: Option<&'a ty::CrateAnalysis>, pub tcx: Option>, pub trans: Option<&'a trans::CrateTranslation>, } impl<'a, 'tcx> CompileState<'a, 'tcx> { fn empty(input: &'a Input, session: &'tcx Session, out_dir: &'a Option) -> Self { CompileState { input, session, out_dir: out_dir.as_ref().map(|s| &**s), out_file: None, arena: None, arenas: None, krate: None, registry: None, cstore: None, crate_name: None, output_filenames: None, expanded_crate: None, hir_crate: None, hir_map: None, resolutions: None, analysis: None, tcx: None, trans: None, } } fn state_after_parse(input: &'a Input, session: &'tcx Session, out_dir: &'a Option, out_file: &'a Option, krate: ast::Crate, cstore: &'tcx CStore) -> Self { CompileState { // Initialize the registry before moving `krate` registry: Some(Registry::new(&session, krate.span)), krate: Some(krate), cstore: Some(cstore), out_file: out_file.as_ref().map(|s| &**s), ..CompileState::empty(input, session, out_dir) } } fn state_after_expand(input: &'a Input, session: &'tcx Session, out_dir: &'a Option, out_file: &'a Option, cstore: &'tcx CStore, expanded_crate: &'a ast::Crate, crate_name: &'a str) -> Self { CompileState { crate_name: Some(crate_name), cstore: Some(cstore), expanded_crate: Some(expanded_crate), out_file: out_file.as_ref().map(|s| &**s), ..CompileState::empty(input, session, out_dir) } } fn state_after_hir_lowering(input: &'a Input, session: &'tcx Session, out_dir: &'a Option, out_file: &'a Option, arena: &'tcx DroplessArena, arenas: &'tcx GlobalArenas<'tcx>, cstore: &'tcx CStore, hir_map: &'a hir_map::Map<'tcx>, analysis: &'a ty::CrateAnalysis, resolutions: &'a Resolutions, krate: &'a ast::Crate, hir_crate: &'a hir::Crate, output_filenames: &'a OutputFilenames, crate_name: &'a str) -> Self { CompileState { crate_name: Some(crate_name), arena: Some(arena), arenas: Some(arenas), cstore: Some(cstore), hir_map: Some(hir_map), analysis: Some(analysis), resolutions: Some(resolutions), expanded_crate: Some(krate), hir_crate: Some(hir_crate), output_filenames: Some(output_filenames), out_file: out_file.as_ref().map(|s| &**s), ..CompileState::empty(input, session, out_dir) } } fn state_after_analysis(input: &'a Input, session: &'tcx Session, out_dir: &'a Option, out_file: &'a Option, krate: Option<&'a ast::Crate>, hir_crate: &'a hir::Crate, analysis: &'a ty::CrateAnalysis, tcx: TyCtxt<'a, 'tcx, 'tcx>, crate_name: &'a str) -> Self { CompileState { analysis: Some(analysis), tcx: Some(tcx), expanded_crate: krate, hir_crate: Some(hir_crate), crate_name: Some(crate_name), out_file: out_file.as_ref().map(|s| &**s), ..CompileState::empty(input, session, out_dir) } } fn state_after_llvm(input: &'a Input, session: &'tcx Session, out_dir: &'a Option, out_file: &'a Option, trans: &'a trans::CrateTranslation) -> Self { CompileState { trans: Some(trans), out_file: out_file.as_ref().map(|s| &**s), ..CompileState::empty(input, session, out_dir) } } fn state_when_compilation_done(input: &'a Input, session: &'tcx Session, out_dir: &'a Option, out_file: &'a Option) -> Self { CompileState { out_file: out_file.as_ref().map(|s| &**s), ..CompileState::empty(input, session, out_dir) } } } pub fn phase_1_parse_input<'a>(control: &CompileController, sess: &'a Session, input: &Input) -> PResult<'a, ast::Crate> { sess.diagnostic().set_continue_after_error(control.continue_parse_after_error); if sess.profile_queries() { profile::begin(); } let krate = time(sess.time_passes(), "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.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.codemap().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 } // For continuing compilation after a parsed crate has been // modified pub struct ExpansionResult { pub expanded_crate: ast::Crate, pub defs: hir_map::Definitions, pub analysis: ty::CrateAnalysis, pub resolutions: Resolutions, pub hir_forest: hir_map::Forest, } /// Run 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 phase_2_configure_and_expand(sess: &Session, cstore: &CStore, krate: ast::Crate, registry: Option, crate_name: &str, addl_plugins: Option>, make_glob_map: MakeGlobMap, after_expand: F) -> Result where F: FnOnce(&ast::Crate) -> CompileResult, { let time_passes = sess.time_passes(); let (mut krate, features) = syntax::config::features(krate, &sess.parse_sess, sess.opts.test); // these need to be set "early" so that expansion sees `quote` if enabled. *sess.features.borrow_mut() = features; *sess.crate_types.borrow_mut() = collect_crate_types(sess, &krate.attrs); let disambiguator = compute_crate_disambiguator(sess); *sess.crate_disambiguator.borrow_mut() = Some(disambiguator); rustc_incremental::prepare_session_directory( sess, &crate_name, disambiguator, ); let dep_graph = if sess.opts.build_dep_graph() { let prev_dep_graph = time(time_passes, "load prev dep-graph", || { rustc_incremental::load_dep_graph(sess) }); DepGraph::new(prev_dep_graph) } else { DepGraph::new_disabled() }; time(time_passes, "recursion limit", || { middle::recursion_limit::update_limits(sess, &krate); }); krate = time(time_passes, "crate injection", || { let alt_std_name = sess.opts.alt_std_name.clone(); syntax::std_inject::maybe_inject_crates_ref(krate, alt_std_name) }); let mut addl_plugins = Some(addl_plugins); let registrars = time(time_passes, "plugin loading", || { plugin::load::load_plugins(sess, &cstore, &krate, crate_name, addl_plugins.take().unwrap()) }); let mut registry = registry.unwrap_or(Registry::new(sess, krate.span)); time(time_passes, "plugin registration", || { if sess.features.borrow().rustc_diagnostic_macros { registry.register_macro("__diagnostic_used", diagnostics::plugin::expand_diagnostic_used); registry.register_macro("__register_diagnostic", diagnostics::plugin::expand_register_diagnostic); registry.register_macro("__build_diagnostic_array", diagnostics::plugin::expand_build_diagnostic_array); } for registrar in registrars { registry.args_hidden = Some(registrar.args); (registrar.fun)(&mut registry); } }); let whitelisted_legacy_custom_derives = registry.take_whitelisted_custom_derives(); let Registry { syntax_exts, early_lint_passes, late_lint_passes, lint_groups, llvm_passes, attributes, .. } = registry; sess.track_errors(|| { let mut ls = sess.lint_store.borrow_mut(); for pass in early_lint_passes { ls.register_early_pass(Some(sess), true, pass); } for pass in late_lint_passes { ls.register_late_pass(Some(sess), true, pass); } for (name, to) in lint_groups { ls.register_group(Some(sess), true, name, to); } *sess.plugin_llvm_passes.borrow_mut() = llvm_passes; *sess.plugin_attributes.borrow_mut() = attributes.clone(); })?; // Lint plugins are registered; now we can process command line flags. if sess.opts.describe_lints { super::describe_lints(&sess.lint_store.borrow(), true); return Err(CompileIncomplete::Stopped); } // 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 mut crate_loader = CrateLoader::new(sess, &cstore, crate_name); let resolver_arenas = Resolver::arenas(); let mut resolver = Resolver::new(sess, cstore, &krate, crate_name, make_glob_map, &mut crate_loader, &resolver_arenas); resolver.whitelisted_legacy_custom_derives = whitelisted_legacy_custom_derives; syntax_ext::register_builtins(&mut resolver, syntax_exts, sess.features.borrow().quote); krate = time(time_passes, "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) .get_dylib_search_paths(); 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()); } let features = sess.features.borrow(); 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); let err_count = ecx.parse_sess.span_diagnostic.err_count(); let krate = ecx.monotonic_expander().expand_crate(krate); 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 ecx.parse_sess.span_diagnostic.err_count() - ecx.resolve_err_count > err_count { ecx.parse_sess.span_diagnostic.abort_if_errors(); } if cfg!(windows) { env::set_var("PATH", &old_path); } krate }); krate = time(time_passes, "maybe building test harness", || { syntax::test::modify_for_testing(&sess.parse_sess, &mut resolver, sess.opts.test, krate, sess.diagnostic()) }); // 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 { krate = ReplaceBodyWithLoop::new(sess).fold_crate(krate); } // If we're in rustdoc we're always compiling as an rlib, but that'll trip a // bunch of checks in the `modify` function below. For now just skip this // step entirely if we're rustdoc as it's not too useful anyway. if !sess.opts.actually_rustdoc { krate = time(time_passes, "maybe creating a macro crate", || { let crate_types = sess.crate_types.borrow(); let num_crate_types = crate_types.len(); let is_proc_macro_crate = crate_types.contains(&config::CrateTypeProcMacro); let is_test_crate = sess.opts.test; syntax_ext::proc_macro_registrar::modify(&sess.parse_sess, &mut resolver, krate, is_proc_macro_crate, is_test_crate, num_crate_types, sess.diagnostic()) }); } krate = time(time_passes, "creating allocators", || { allocator::expand::modify(&sess.parse_sess, &mut resolver, krate, sess.diagnostic()) }); after_expand(&krate)?; 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(time_passes, "checking for inline asm in case the target doesn't support it", || no_asm::check_crate(sess, &krate)); time(time_passes, "AST validation", || ast_validation::check_crate(sess, &krate)); time(time_passes, "name resolution", || -> CompileResult { resolver.resolve_crate(&krate); Ok(()) })?; if resolver.found_unresolved_macro { sess.parse_sess.span_diagnostic.abort_if_errors(); } // Needs to go *after* expansion to be able to check the results of macro expansion. time(time_passes, "complete gated feature checking", || { sess.track_errors(|| { syntax::feature_gate::check_crate(&krate, &sess.parse_sess, &sess.features.borrow(), &attributes, sess.opts.unstable_features); }) })?; // Lower ast -> hir. let hir_forest = time(time_passes, "lowering ast -> hir", || { let hir_crate = lower_crate(sess, cstore, &dep_graph, &krate, &mut resolver); if sess.opts.debugging_opts.hir_stats { hir_stats::print_hir_stats(&hir_crate); } hir_map::Forest::new(hir_crate, &dep_graph) }); time(time_passes, "early lint checks", || lint::check_ast_crate(sess, &krate)); // Discard hygiene data, which isn't required after lowering to HIR. if !keep_hygiene_data(sess) { syntax::ext::hygiene::clear_markings(); } Ok(ExpansionResult { expanded_crate: krate, defs: resolver.definitions, analysis: ty::CrateAnalysis { access_levels: Rc::new(AccessLevels::default()), name: crate_name.to_string(), glob_map: if resolver.make_glob_map { Some(resolver.glob_map) } else { None }, }, resolutions: Resolutions { freevars: resolver.freevars, export_map: resolver.export_map, trait_map: resolver.trait_map, maybe_unused_trait_imports: resolver.maybe_unused_trait_imports, maybe_unused_extern_crates: resolver.maybe_unused_extern_crates, }, hir_forest, }) } pub fn default_provide(providers: &mut ty::maps::Providers) { borrowck::provide(providers); mir::provide(providers); reachable::provide(providers); rustc_privacy::provide(providers); DefaultTransCrate::provide(providers); typeck::provide(providers); ty::provide(providers); traits::provide(providers); reachable::provide(providers); rustc_const_eval::provide(providers); rustc_passes::provide(providers); middle::region::provide(providers); cstore::provide(providers); lint::provide(providers); } pub fn default_provide_extern(providers: &mut ty::maps::Providers) { cstore::provide_extern(providers); DefaultTransCrate::provide_extern(providers); } /// Run the resolution, typechecking, region checking and other /// miscellaneous analysis passes on the crate. Return various /// structures carrying the results of the analysis. pub fn phase_3_run_analysis_passes<'tcx, F, R>(control: &CompileController, sess: &'tcx Session, cstore: &'tcx CrateStore, hir_map: hir_map::Map<'tcx>, mut analysis: ty::CrateAnalysis, resolutions: Resolutions, arena: &'tcx DroplessArena, arenas: &'tcx GlobalArenas<'tcx>, name: &str, output_filenames: &OutputFilenames, f: F) -> Result where F: for<'a> FnOnce(TyCtxt<'a, 'tcx, 'tcx>, ty::CrateAnalysis, mpsc::Receiver>, CompileResult) -> R { macro_rules! try_with_f { ($e: expr, ($($t:tt)*)) => { match $e { Ok(x) => x, Err(x) => { f($($t)*, Err(x)); return Err(x); } } } } let time_passes = sess.time_passes(); let query_result_on_disk_cache = time(time_passes, "load query result cache", || rustc_incremental::load_query_result_cache(sess)); let named_region_map = time(time_passes, "lifetime resolution", || middle::resolve_lifetime::krate(sess, cstore, &hir_map))?; time(time_passes, "looking for entry point", || middle::entry::find_entry_point(sess, &hir_map)); sess.plugin_registrar_fn.set(time(time_passes, "looking for plugin registrar", || { plugin::build::find_plugin_registrar(sess.diagnostic(), &hir_map) })); sess.derive_registrar_fn.set(derive_registrar::find(&hir_map)); time(time_passes, "loop checking", || loops::check_crate(sess, &hir_map)); time(time_passes, "static item recursion checking", || static_recursion::check_crate(sess, &hir_map))?; let mut local_providers = ty::maps::Providers::default(); default_provide(&mut local_providers); (control.provide)(&mut local_providers); let mut extern_providers = local_providers; default_provide_extern(&mut extern_providers); (control.provide_extern)(&mut extern_providers); let (tx, rx) = mpsc::channel(); TyCtxt::create_and_enter(sess, cstore, local_providers, extern_providers, arenas, arena, resolutions, named_region_map, hir_map, query_result_on_disk_cache, name, tx, output_filenames, |tcx| { // Do some initialization of the DepGraph that can only be done with the // tcx available. rustc_incremental::dep_graph_tcx_init(tcx); time(time_passes, "stability checking", || stability::check_unstable_api_usage(tcx)); // passes are timed inside typeck try_with_f!(typeck::check_crate(tcx), (tcx, analysis, rx)); time(time_passes, "const checking", || consts::check_crate(tcx)); analysis.access_levels = time(time_passes, "privacy checking", || rustc_privacy::check_crate(tcx)); time(time_passes, "intrinsic checking", || middle::intrinsicck::check_crate(tcx)); time(time_passes, "match checking", || check_match::check_crate(tcx)); // 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? time(time_passes, "liveness checking", || middle::liveness::check_crate(tcx)); time(time_passes, "borrow checking", || borrowck::check_crate(tcx)); time(time_passes, "MIR borrow checking", || for def_id in tcx.body_owners() { tcx.mir_borrowck(def_id); }); time(time_passes, "MIR effect checking", || for def_id in tcx.body_owners() { mir::transform::check_unsafety::check_unsafety(tcx, def_id) }); // Avoid overwhelming user with errors if type 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.err_count() > 0 { return Ok(f(tcx, analysis, rx, sess.compile_status())); } time(time_passes, "death checking", || middle::dead::check_crate(tcx)); time(time_passes, "unused lib feature checking", || { stability::check_unused_or_stable_features(tcx) }); time(time_passes, "lint checking", || lint::check_crate(tcx)); return Ok(f(tcx, analysis, rx, tcx.sess.compile_status())); }) } /// Run the translation phase to LLVM, after which the AST and analysis can /// be discarded. pub fn phase_4_translate_to_llvm<'a, 'tcx, Trans: TransCrate>(tcx: TyCtxt<'a, 'tcx, 'tcx>, rx: mpsc::Receiver>) -> ::OngoingCrateTranslation { let time_passes = tcx.sess.time_passes(); time(time_passes, "resolving dependency formats", || ::rustc::middle::dependency_format::calculate(tcx)); let translation = time(time_passes, "translation", move || { Trans::trans_crate(tcx, rx) }); if tcx.sess.profile_queries() { profile::dump("profile_queries".to_string()) } translation } /// Run LLVM itself, producing a bitcode file, assembly file or object file /// as a side effect. pub fn phase_5_run_llvm_passes(sess: &Session, dep_graph: &DepGraph, trans: ::OngoingCrateTranslation) -> (CompileResult, ::TranslatedCrate) { let trans = Trans::join_trans(trans, sess, dep_graph); if sess.opts.debugging_opts.incremental_info { Trans::dump_incremental_data(&trans); } time(sess.time_passes(), "serialize work products", move || rustc_incremental::save_work_products(sess, dep_graph)); (sess.compile_status(), trans) } fn escape_dep_filename(filename: &str) -> String { // Apparently clang and gcc *only* escape spaces: // http://llvm.org/klaus/clang/commit/9d50634cfc268ecc9a7250226dd5ca0e945240d4 filename.replace(" ", "\\ ") } fn write_out_deps(sess: &Session, outputs: &OutputFilenames, crate_name: &str) { let mut out_filenames = Vec::new(); for output_type in sess.opts.output_types.keys() { let file = outputs.path(*output_type); match *output_type { OutputType::Exe => { for output in sess.crate_types.borrow().iter() { let p = ::rustc_trans_utils::link::filename_for_input( sess, *output, crate_name, outputs ); out_filenames.push(p); } } _ => { out_filenames.push(file); } } } // 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 files: Vec = sess.codemap() .files() .iter() .filter(|fmap| fmap.is_real_file()) .filter(|fmap| !fmap.is_imported()) .map(|fmap| escape_dep_filename(&fmap.name)) .collect(); let mut file = fs::File::create(&deps_filename)?; for path in &out_filenames { write!(file, "{}: {}\n\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(()) => {} Err(e) => { sess.fatal(&format!("error writing dependencies to `{}`: {}", deps_filename.display(), e)); } } } pub fn collect_crate_types(session: &Session, attrs: &[ast::Attribute]) -> Vec { // Unconditionally collect crate types from attributes to make them used let attr_types: Vec = attrs.iter() .filter_map(|a| { if a.check_name("crate_type") { match a.value_str() { Some(ref n) if *n == "rlib" => { Some(config::CrateTypeRlib) } Some(ref n) if *n == "dylib" => { Some(config::CrateTypeDylib) } Some(ref n) if *n == "cdylib" => { Some(config::CrateTypeCdylib) } Some(ref n) if *n == "lib" => { Some(config::default_lib_output()) } Some(ref n) if *n == "staticlib" => { Some(config::CrateTypeStaticlib) } Some(ref n) if *n == "proc-macro" => { Some(config::CrateTypeProcMacro) } Some(ref n) if *n == "bin" => Some(config::CrateTypeExecutable), Some(_) => { session.buffer_lint(lint::builtin::UNKNOWN_CRATE_TYPES, ast::CRATE_NODE_ID, a.span, "invalid `crate_type` value"); None } _ => { session.struct_span_err(a.span, "`crate_type` requires a value") .note("for example: `#![crate_type=\"lib\"]`") .emit(); None } } } else { None } }) .collect(); // If we're generating a test executable, then ignore all other output // styles at all other locations if session.opts.test { return vec![config::CrateTypeExecutable]; } // Only check command line flags if present. If no types are specified by // command line, then reuse the empty `base` Vec to hold the types that // will be found in crate attributes. let mut base = session.opts.crate_types.clone(); if base.is_empty() { base.extend(attr_types); if base.is_empty() { base.push(::rustc_trans_utils::link::default_output_for_target(session)); } base.sort(); base.dedup(); } base.into_iter() .filter(|crate_type| { let res = !::rustc_trans_utils::link::invalid_output_for_target(session, *crate_type); if !res { session.warn(&format!("dropping unsupported crate type `{}` for target `{}`", *crate_type, session.opts.target_triple)); } res }) .collect() } pub fn compute_crate_disambiguator(session: &Session) -> CrateDisambiguator { use std::hash::Hasher; // The crate_disambiguator is a 128 bit hash. The disambiguator is fed // into various other hashes quite a bit (symbol hashes, incr. comp. hashes, // debuginfo type IDs, etc), so we don't want it to be too wide. 128 bits // should still be safe enough to avoid collisions in practice. let mut hasher = StableHasher::::new(); let mut metadata = session.opts.cg.metadata.clone(); // We don't want the crate_disambiguator to dependent on the order // -C metadata arguments, so sort them: metadata.sort(); // Every distinct -C metadata value is only incorporated once: metadata.dedup(); hasher.write(b"metadata"); for s in &metadata { // Also incorporate the length of a metadata string, so that we generate // different values for `-Cmetadata=ab -Cmetadata=c` and // `-Cmetadata=a -Cmetadata=bc` hasher.write_usize(s.len()); hasher.write(s.as_bytes()); } // Also incorporate crate type, so that we don't get symbol conflicts when // linking against a library of the same name, if this is an executable. let is_exe = session.crate_types.borrow().contains(&config::CrateTypeExecutable); hasher.write(if is_exe { b"exe" } else { b"lib" }); CrateDisambiguator::from(hasher.finish()) } pub fn build_output_filenames(input: &Input, odir: &Option, ofile: &Option, attrs: &[ast::Attribute], sess: &Session) -> OutputFilenames { match *ofile { None => { // "-" as input file will cause the parser to read from stdin so we // have to make up a name // We want to toss everything after the final '.' let dirpath = match *odir { Some(ref d) => d.clone(), None => PathBuf::new(), }; // If a crate name is present, we use it as the link name let stem = sess.opts .crate_name .clone() .or_else(|| attr::find_crate_name(attrs).map(|n| n.to_string())) .unwrap_or(input.filestem()); OutputFilenames { out_directory: dirpath, out_filestem: stem, single_output_file: None, extra: sess.opts.cg.extra_filename.clone(), outputs: sess.opts.output_types.clone(), } } Some(ref out_file) => { let unnamed_output_types = sess.opts .output_types .values() .filter(|a| a.is_none()) .count(); let ofile = if unnamed_output_types > 1 { sess.warn("due to multiple output types requested, the explicitly specified \ output file name will be adapted for each output type"); None } else { Some(out_file.clone()) }; if *odir != None { sess.warn("ignoring --out-dir flag due to -o flag."); } let cur_dir = Path::new(""); OutputFilenames { out_directory: out_file.parent().unwrap_or(cur_dir).to_path_buf(), out_filestem: out_file.file_stem() .unwrap_or(OsStr::new("")) .to_str() .unwrap() .to_string(), single_output_file: ofile, extra: sess.opts.cg.extra_filename.clone(), outputs: sess.opts.output_types.clone(), } } } }