| // 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 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| use rustc::hir; |
| use rustc::hir::{map as hir_map, FreevarMap, TraitMap}; |
| use rustc::hir::def::DefMap; |
| use rustc::hir::lowering::lower_crate; |
| use rustc_mir as mir; |
| use rustc::mir::mir_map::MirMap; |
| use rustc::session::{Session, CompileResult, compile_result_from_err_count}; |
| use rustc::session::config::{self, Input, OutputFilenames, OutputType}; |
| use rustc::session::search_paths::PathKind; |
| use rustc::lint; |
| use rustc::middle::{self, dependency_format, stability, reachable}; |
| use rustc::middle::privacy::AccessLevels; |
| use rustc::ty::{self, TyCtxt}; |
| use rustc::util::common::time; |
| use rustc::util::nodemap::NodeSet; |
| use rustc_back::sha2::{Sha256, Digest}; |
| use rustc_borrowck as borrowck; |
| use rustc_incremental; |
| use rustc_resolve::{MakeGlobMap, Resolver}; |
| use rustc_metadata::macro_import; |
| use rustc_metadata::creader::read_local_crates; |
| use rustc_metadata::cstore::CStore; |
| use rustc_trans::back::{link, write}; |
| use rustc_trans as trans; |
| use rustc_typeck as typeck; |
| use rustc_privacy; |
| use rustc_plugin::registry::Registry; |
| use rustc_plugin as plugin; |
| use rustc_passes::{ast_validation, no_asm, loops, consts, rvalues, static_recursion}; |
| use rustc_const_eval::check_match; |
| use super::Compilation; |
| |
| use serialize::json; |
| |
| use std::collections::HashMap; |
| use std::env; |
| use std::ffi::{OsString, OsStr}; |
| use std::fs; |
| use std::io::{self, Write}; |
| use std::path::{Path, PathBuf}; |
| use syntax::{ast, diagnostics, visit}; |
| use syntax::attr::{self, AttrMetaMethods}; |
| use syntax::parse::{self, PResult, token}; |
| use syntax::util::node_count::NodeCounter; |
| use syntax; |
| use syntax_ext; |
| |
| #[derive(Clone)] |
| pub struct Resolutions { |
| pub def_map: DefMap, |
| pub freevars: FreevarMap, |
| pub trait_map: TraitMap, |
| pub maybe_unused_trait_imports: NodeSet, |
| } |
| |
| pub fn compile_input(sess: &Session, |
| cstore: &CStore, |
| cfg: ast::CrateConfig, |
| input: &Input, |
| outdir: &Option<PathBuf>, |
| output: &Option<PathBuf>, |
| addl_plugins: Option<Vec<String>>, |
| control: &CompileController) -> CompileResult { |
| 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.$point.stop == Compilation::Stop { |
| return compile_result_from_err_count($tsess.err_count()); |
| } |
| }} |
| } |
| |
| // 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, crate_name) = { |
| let krate = match phase_1_parse_input(sess, cfg, input) { |
| Ok(krate) => krate, |
| Err(mut parse_error) => { |
| parse_error.emit(); |
| return Err(1); |
| } |
| }; |
| |
| let krate = { |
| 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() |
| }; |
| |
| let outputs = build_output_filenames(input, outdir, output, &krate.attrs, sess); |
| let crate_name = 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, &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); |
| |
| let arenas = ty::CtxtArenas::new(); |
| |
| // Construct the HIR map |
| let hir_map = time(sess.time_passes(), |
| "indexing hir", |
| || hir_map::map_crate(&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, |
| &arenas, |
| &cstore, |
| &hir_map, |
| &analysis, |
| &resolutions, |
| &expanded_crate, |
| &hir_map.krate(), |
| &crate_name), |
| Ok(())); |
| } |
| |
| time(sess.time_passes(), "attribute checking", || { |
| hir::check_attr::check_crate(sess, &expanded_crate); |
| }); |
| |
| let opt_crate = if keep_ast(sess) { |
| Some(&expanded_crate) |
| } else { |
| drop(expanded_crate); |
| None |
| }; |
| |
| phase_3_run_analysis_passes(sess, |
| hir_map, |
| analysis, |
| resolutions, |
| &arenas, |
| &crate_name, |
| |tcx, mir_map, analysis, 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.map.krate(), |
| &analysis, |
| mir_map.as_ref(), |
| tcx, |
| &crate_name); |
| (control.after_analysis.callback)(&mut state); |
| |
| if control.after_analysis.stop == Compilation::Stop { |
| return result.and_then(|_| Err(0usize)); |
| } |
| } |
| |
| result?; |
| |
| if log_enabled!(::log::INFO) { |
| println!("Pre-trans"); |
| tcx.print_debug_stats(); |
| } |
| let trans = phase_4_translate_to_llvm(tcx, |
| mir_map.unwrap(), |
| analysis); |
| |
| if log_enabled!(::log::INFO) { |
| println!("Post-trans"); |
| tcx.print_debug_stats(); |
| } |
| |
| // Discard interned strings as they are no longer required. |
| token::clear_ident_interner(); |
| |
| Ok((outputs, trans, crate_name.clone())) |
| })?? |
| }; |
| |
| let phase5_result = phase_5_run_llvm_passes(sess, &crate_name, &trans, &outputs); |
| |
| controller_entry_point!(after_llvm, |
| sess, |
| CompileState::state_after_llvm(input, sess, outdir, output, &trans), |
| phase5_result); |
| phase5_result?; |
| |
| write::cleanup_llvm(&trans); |
| |
| phase_6_link_output(sess, &trans, &outputs); |
| |
| 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 |
| } |
| |
| fn keep_ast(sess: &Session) -> bool { |
| sess.opts.debugging_opts.keep_ast || |
| sess.opts.debugging_opts.save_analysis || |
| sess.opts.debugging_opts.save_analysis_csv |
| } |
| |
| /// 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 { |
| "<anon>".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 customise 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 |
| /// 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>, |
| |
| pub make_glob_map: MakeGlobMap, |
| } |
| |
| 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, |
| } |
| } |
| } |
| |
| 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<Fn(&mut CompileState) + 'a>, |
| } |
| |
| 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, 'b, 'ast: 'a, 'tcx: 'b> where 'ast: 'tcx { |
| pub input: &'a Input, |
| pub session: &'ast Session, |
| pub krate: Option<ast::Crate>, |
| pub cstore: Option<&'a 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 arenas: Option<&'ast ty::CtxtArenas<'ast>>, |
| pub expanded_crate: Option<&'a ast::Crate>, |
| pub hir_crate: Option<&'a hir::Crate>, |
| pub ast_map: Option<&'a hir_map::Map<'ast>>, |
| pub resolutions: Option<&'a Resolutions>, |
| pub mir_map: Option<&'b MirMap<'tcx>>, |
| pub analysis: Option<&'a ty::CrateAnalysis<'a>>, |
| pub tcx: Option<TyCtxt<'b, 'tcx, 'tcx>>, |
| pub trans: Option<&'a trans::CrateTranslation>, |
| } |
| |
| impl<'a, 'b, 'ast, 'tcx> CompileState<'a, 'b, 'ast, 'tcx> { |
| fn empty(input: &'a Input, |
| session: &'ast Session, |
| out_dir: &'a Option<PathBuf>) |
| -> CompileState<'a, 'b, 'ast, 'tcx> { |
| CompileState { |
| input: input, |
| session: session, |
| out_dir: out_dir.as_ref().map(|s| &**s), |
| out_file: None, |
| arenas: None, |
| krate: None, |
| cstore: None, |
| crate_name: None, |
| output_filenames: None, |
| expanded_crate: None, |
| hir_crate: None, |
| ast_map: None, |
| resolutions: None, |
| analysis: None, |
| mir_map: None, |
| tcx: None, |
| trans: None, |
| } |
| } |
| |
| fn state_after_parse(input: &'a Input, |
| session: &'ast Session, |
| out_dir: &'a Option<PathBuf>, |
| out_file: &'a Option<PathBuf>, |
| krate: ast::Crate, |
| cstore: &'a CStore) |
| -> CompileState<'a, 'b, 'ast, 'tcx> { |
| CompileState { |
| 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: &'ast Session, |
| out_dir: &'a Option<PathBuf>, |
| out_file: &'a Option<PathBuf>, |
| cstore: &'a CStore, |
| expanded_crate: &'a ast::Crate, |
| crate_name: &'a str) |
| -> CompileState<'a, 'b, 'ast, 'tcx> { |
| 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: &'ast Session, |
| out_dir: &'a Option<PathBuf>, |
| out_file: &'a Option<PathBuf>, |
| arenas: &'ast ty::CtxtArenas<'ast>, |
| cstore: &'a CStore, |
| hir_map: &'a hir_map::Map<'ast>, |
| analysis: &'a ty::CrateAnalysis, |
| resolutions: &'a Resolutions, |
| krate: &'a ast::Crate, |
| hir_crate: &'a hir::Crate, |
| crate_name: &'a str) |
| -> CompileState<'a, 'b, 'ast, 'tcx> { |
| CompileState { |
| crate_name: Some(crate_name), |
| arenas: Some(arenas), |
| cstore: Some(cstore), |
| ast_map: Some(hir_map), |
| analysis: Some(analysis), |
| resolutions: Some(resolutions), |
| expanded_crate: Some(krate), |
| hir_crate: Some(hir_crate), |
| out_file: out_file.as_ref().map(|s| &**s), |
| ..CompileState::empty(input, session, out_dir) |
| } |
| } |
| |
| fn state_after_analysis(input: &'a Input, |
| session: &'ast Session, |
| out_dir: &'a Option<PathBuf>, |
| out_file: &'a Option<PathBuf>, |
| krate: Option<&'a ast::Crate>, |
| hir_crate: &'a hir::Crate, |
| analysis: &'a ty::CrateAnalysis<'a>, |
| mir_map: Option<&'b MirMap<'tcx>>, |
| tcx: TyCtxt<'b, 'tcx, 'tcx>, |
| crate_name: &'a str) |
| -> CompileState<'a, 'b, 'ast, 'tcx> { |
| CompileState { |
| analysis: Some(analysis), |
| mir_map: mir_map, |
| 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: &'ast Session, |
| out_dir: &'a Option<PathBuf>, |
| out_file: &'a Option<PathBuf>, |
| trans: &'a trans::CrateTranslation) |
| -> CompileState<'a, 'b, 'ast, 'tcx> { |
| 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: &'ast Session, |
| out_dir: &'a Option<PathBuf>, |
| out_file: &'a Option<PathBuf>) |
| -> CompileState<'a, 'b, 'ast, 'tcx> { |
| CompileState { |
| out_file: out_file.as_ref().map(|s| &**s), |
| ..CompileState::empty(input, session, out_dir) |
| } |
| } |
| } |
| |
| pub fn phase_1_parse_input<'a>(sess: &'a Session, |
| cfg: ast::CrateConfig, |
| input: &Input) |
| -> PResult<'a, ast::Crate> { |
| let continue_after_error = sess.opts.continue_parse_after_error; |
| sess.diagnostic().set_continue_after_error(continue_after_error); |
| |
| let krate = time(sess.time_passes(), "parsing", || { |
| match *input { |
| Input::File(ref file) => { |
| parse::parse_crate_from_file(file, cfg.clone(), &sess.parse_sess) |
| } |
| Input::Str { ref input, ref name } => { |
| parse::parse_crate_from_source_str(name.clone(), |
| input.clone(), |
| cfg.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); |
| } |
| |
| 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<'a> { |
| pub expanded_crate: ast::Crate, |
| pub defs: hir_map::Definitions, |
| pub analysis: ty::CrateAnalysis<'a>, |
| 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<'a, F>(sess: &Session, |
| cstore: &CStore, |
| mut krate: ast::Crate, |
| crate_name: &'a str, |
| addl_plugins: Option<Vec<String>>, |
| make_glob_map: MakeGlobMap, |
| after_expand: F) |
| -> Result<ExpansionResult<'a>, usize> |
| where F: FnOnce(&ast::Crate) -> CompileResult, |
| { |
| let time_passes = sess.time_passes(); |
| |
| // strip before anything else because crate metadata may use #[cfg_attr] |
| // and so macros can depend on configuration variables, such as |
| // |
| // #[macro_use] #[cfg(foo)] |
| // mod bar { macro_rules! baz!(() => {{}}) } |
| // |
| // baz! should not use this definition unless foo is enabled. |
| |
| krate = time(time_passes, "configuration", || { |
| let (krate, features) = |
| syntax::config::strip_unconfigured_items(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; |
| krate |
| }); |
| |
| *sess.crate_types.borrow_mut() = collect_crate_types(sess, &krate.attrs); |
| *sess.crate_disambiguator.borrow_mut() = |
| token::intern(&compute_crate_disambiguator(sess)).as_str(); |
| |
| time(time_passes, "recursion limit", || { |
| middle::recursion_limit::update_recursion_limit(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(&sess.parse_sess, 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::new(sess, &krate); |
| |
| 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 Registry { syntax_exts, early_lint_passes, late_lint_passes, lint_groups, |
| llvm_passes, attributes, mir_passes, .. } = 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.mir_passes.borrow_mut().extend(mir_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(0); |
| } |
| sess.track_errors(|| sess.lint_store.borrow_mut().process_command_line(sess))?; |
| |
| 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).unwrap()); |
| } |
| let features = sess.features.borrow(); |
| let cfg = syntax::ext::expand::ExpansionConfig { |
| crate_name: crate_name.to_string(), |
| features: Some(&features), |
| recursion_limit: sess.recursion_limit.get(), |
| trace_mac: sess.opts.debugging_opts.trace_macros, |
| should_test: sess.opts.test, |
| }; |
| let mut loader = macro_import::MacroLoader::new(sess, &cstore, crate_name); |
| let mut ecx = syntax::ext::base::ExtCtxt::new(&sess.parse_sess, |
| krate.config.clone(), |
| cfg, |
| &mut loader); |
| syntax_ext::register_builtins(&mut ecx.syntax_env); |
| let (ret, macro_names) = syntax::ext::expand::expand_crate(ecx, |
| syntax_exts, |
| krate); |
| if cfg!(windows) { |
| env::set_var("PATH", &old_path); |
| } |
| *sess.available_macros.borrow_mut() = macro_names; |
| ret |
| }); |
| |
| krate = time(time_passes, "maybe building test harness", || { |
| syntax::test::modify_for_testing(&sess.parse_sess, |
| sess.opts.test, |
| krate, |
| sess.diagnostic()) |
| }); |
| |
| let resolver_arenas = Resolver::arenas(); |
| let mut resolver = Resolver::new(sess, make_glob_map, &resolver_arenas); |
| |
| let krate = time(sess.time_passes(), "assigning node ids", || resolver.assign_node_ids(krate)); |
| |
| if sess.opts.debugging_opts.input_stats { |
| println!("Post-expansion node count: {}", count_nodes(&krate)); |
| } |
| |
| 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)); |
| |
| // 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); |
| }) |
| })?; |
| |
| // Collect defintions for def ids. |
| time(sess.time_passes(), "collecting defs", || resolver.definitions.collect(&krate)); |
| |
| time(sess.time_passes(), "external crate/lib resolution", || { |
| let defs = &resolver.definitions; |
| read_local_crates(sess, &cstore, defs, &krate, crate_name, &sess.dep_graph) |
| }); |
| |
| time(sess.time_passes(), |
| "early lint checks", |
| || lint::check_ast_crate(sess, &krate)); |
| |
| time(sess.time_passes(), |
| "AST validation", |
| || ast_validation::check_crate(sess, &krate)); |
| |
| time(sess.time_passes(), "name resolution", || -> CompileResult { |
| // 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 _ignore = sess.dep_graph.in_ignore(); |
| resolver.build_reduced_graph(&krate); |
| resolver.resolve_imports(); |
| |
| // Since import resolution will eventually happen in expansion, |
| // don't perform `after_expand` until after import resolution. |
| after_expand(&krate)?; |
| |
| resolver.resolve_crate(&krate); |
| Ok(()) |
| })?; |
| |
| // Lower ast -> hir. |
| let hir_forest = time(sess.time_passes(), "lowering ast -> hir", || { |
| hir_map::Forest::new(lower_crate(sess, &krate, &mut resolver), &sess.dep_graph) |
| }); |
| |
| // Discard hygiene data, which isn't required past lowering to HIR. |
| if !keep_hygiene_data(sess) { |
| syntax::ext::hygiene::reset_hygiene_data(); |
| } |
| |
| Ok(ExpansionResult { |
| expanded_crate: krate, |
| defs: resolver.definitions, |
| analysis: ty::CrateAnalysis { |
| export_map: resolver.export_map, |
| access_levels: AccessLevels::default(), |
| reachable: NodeSet(), |
| name: crate_name, |
| glob_map: if resolver.make_glob_map { Some(resolver.glob_map) } else { None }, |
| }, |
| resolutions: Resolutions { |
| def_map: resolver.def_map, |
| freevars: resolver.freevars, |
| trait_map: resolver.trait_map, |
| maybe_unused_trait_imports: resolver.maybe_unused_trait_imports, |
| }, |
| hir_forest: hir_forest |
| }) |
| } |
| |
| /// 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>(sess: &'tcx Session, |
| hir_map: hir_map::Map<'tcx>, |
| mut analysis: ty::CrateAnalysis, |
| resolutions: Resolutions, |
| arenas: &'tcx ty::CtxtArenas<'tcx>, |
| name: &str, |
| f: F) |
| -> Result<R, usize> |
| where F: for<'a> FnOnce(TyCtxt<'a, 'tcx, 'tcx>, |
| Option<MirMap<'tcx>>, |
| ty::CrateAnalysis, |
| CompileResult) -> R |
| { |
| macro_rules! try_with_f { |
| ($e: expr, ($t: expr, $m: expr, $a: expr)) => { |
| match $e { |
| Ok(x) => x, |
| Err(x) => { |
| f($t, $m, $a, Err(x)); |
| return Err(x); |
| } |
| } |
| } |
| } |
| |
| let time_passes = sess.time_passes(); |
| |
| let lang_items = time(time_passes, "language item collection", || { |
| sess.track_errors(|| { |
| middle::lang_items::collect_language_items(&sess, &hir_map) |
| }) |
| })?; |
| |
| let named_region_map = time(time_passes, |
| "lifetime resolution", |
| || middle::resolve_lifetime::krate(sess, |
| &hir_map, |
| &resolutions.def_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) |
| })); |
| |
| let region_map = time(time_passes, |
| "region resolution", |
| || middle::region::resolve_crate(sess, &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, &resolutions.def_map, &hir_map))?; |
| |
| let index = stability::Index::new(&hir_map); |
| |
| let trait_map = resolutions.trait_map; |
| TyCtxt::create_and_enter(sess, |
| arenas, |
| resolutions.def_map, |
| named_region_map, |
| hir_map, |
| resolutions.freevars, |
| resolutions.maybe_unused_trait_imports, |
| region_map, |
| lang_items, |
| index, |
| name, |
| |tcx| { |
| time(time_passes, |
| "load_dep_graph", |
| || rustc_incremental::load_dep_graph(tcx)); |
| |
| // passes are timed inside typeck |
| try_with_f!(typeck::check_crate(tcx, trait_map), (tcx, None, analysis)); |
| |
| time(time_passes, |
| "const checking", |
| || consts::check_crate(tcx)); |
| |
| analysis.access_levels = |
| time(time_passes, "privacy checking", || { |
| rustc_privacy::check_crate(tcx, &analysis.export_map) |
| }); |
| |
| // Do not move this check past lint |
| time(time_passes, "stability index", || { |
| tcx.stability.borrow_mut().build(tcx, &analysis.access_levels) |
| }); |
| |
| time(time_passes, |
| "intrinsic checking", |
| || middle::intrinsicck::check_crate(tcx)); |
| |
| time(time_passes, |
| "effect checking", |
| || middle::effect::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, |
| "rvalue checking", |
| || rvalues::check_crate(tcx)); |
| |
| let mut mir_map = |
| time(time_passes, |
| "MIR dump", |
| || mir::mir_map::build_mir_for_crate(tcx)); |
| |
| time(time_passes, "MIR passes", || { |
| let mut passes = sess.mir_passes.borrow_mut(); |
| // Push all the built-in passes. |
| passes.push_hook(box mir::transform::dump_mir::DumpMir); |
| passes.push_pass(box mir::transform::simplify_cfg::SimplifyCfg::new("initial")); |
| passes.push_pass(box mir::transform::qualify_consts::QualifyAndPromoteConstants); |
| passes.push_pass(box mir::transform::type_check::TypeckMir); |
| passes.push_pass( |
| box mir::transform::simplify_branches::SimplifyBranches::new("initial")); |
| passes.push_pass(box mir::transform::simplify_cfg::SimplifyCfg::new("qualify-consts")); |
| // And run everything. |
| passes.run_passes(tcx, &mut mir_map); |
| }); |
| |
| time(time_passes, |
| "borrow checking", |
| || borrowck::check_crate(tcx, &mir_map)); |
| |
| // 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, Some(mir_map), analysis, Err(sess.err_count()))); |
| } |
| |
| analysis.reachable = |
| time(time_passes, |
| "reachability checking", |
| || reachable::find_reachable(tcx, &analysis.access_levels)); |
| |
| time(time_passes, "death checking", || { |
| middle::dead::check_crate(tcx, &analysis.access_levels); |
| }); |
| |
| let ref lib_features_used = |
| time(time_passes, |
| "stability checking", |
| || stability::check_unstable_api_usage(tcx)); |
| |
| time(time_passes, "unused lib feature checking", || { |
| stability::check_unused_or_stable_features(&tcx.sess, |
| lib_features_used) |
| }); |
| |
| time(time_passes, |
| "lint checking", |
| || lint::check_crate(tcx, &analysis.access_levels)); |
| |
| // The above three passes generate errors w/o aborting |
| if sess.err_count() > 0 { |
| return Ok(f(tcx, Some(mir_map), analysis, Err(sess.err_count()))); |
| } |
| |
| Ok(f(tcx, Some(mir_map), analysis, Ok(()))) |
| }) |
| } |
| |
| /// Run the translation phase to LLVM, after which the AST and analysis can |
| pub fn phase_4_translate_to_llvm<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, |
| mut mir_map: MirMap<'tcx>, |
| analysis: ty::CrateAnalysis) |
| -> trans::CrateTranslation { |
| let time_passes = tcx.sess.time_passes(); |
| |
| time(time_passes, |
| "resolving dependency formats", |
| || dependency_format::calculate(&tcx.sess)); |
| |
| // Run the passes that transform the MIR into a more suitable for translation |
| // to LLVM code. |
| time(time_passes, "Prepare MIR codegen passes", || { |
| let mut passes = ::rustc::mir::transform::Passes::new(); |
| passes.push_hook(box mir::transform::dump_mir::DumpMir); |
| passes.push_pass(box mir::transform::no_landing_pads::NoLandingPads); |
| passes.push_pass(box mir::transform::simplify_cfg::SimplifyCfg::new("no-landing-pads")); |
| |
| passes.push_pass(box mir::transform::erase_regions::EraseRegions); |
| |
| passes.push_pass(box mir::transform::add_call_guards::AddCallGuards); |
| passes.push_pass(box borrowck::ElaborateDrops); |
| passes.push_pass(box mir::transform::no_landing_pads::NoLandingPads); |
| passes.push_pass(box mir::transform::simplify_cfg::SimplifyCfg::new("elaborate-drops")); |
| |
| passes.push_pass(box mir::transform::deaggregator::Deaggregator); |
| |
| passes.push_pass(box mir::transform::add_call_guards::AddCallGuards); |
| passes.push_pass(box mir::transform::dump_mir::Marker("PreTrans")); |
| |
| passes.run_passes(tcx, &mut mir_map); |
| }); |
| |
| let translation = |
| time(time_passes, |
| "translation", |
| move || trans::trans_crate(tcx, &mir_map, analysis)); |
| |
| time(time_passes, |
| "assert dep graph", |
| move || rustc_incremental::assert_dep_graph(tcx)); |
| |
| time(time_passes, |
| "serialize dep graph", |
| move || rustc_incremental::save_dep_graph(tcx)); |
| |
| 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, |
| crate_name: &str, |
| trans: &trans::CrateTranslation, |
| outputs: &OutputFilenames) -> CompileResult { |
| if sess.opts.cg.no_integrated_as { |
| let mut map = HashMap::new(); |
| map.insert(OutputType::Assembly, None); |
| time(sess.time_passes(), |
| "LLVM passes", |
| || write::run_passes(sess, trans, &map, outputs)); |
| |
| write::run_assembler(sess, outputs); |
| |
| // Remove assembly source, unless --save-temps was specified |
| if !sess.opts.cg.save_temps { |
| fs::remove_file(&outputs.temp_path(OutputType::Assembly, None)).unwrap(); |
| } |
| } else { |
| time(sess.time_passes(), |
| "LLVM passes", |
| || write::run_passes(sess, trans, &sess.opts.output_types, outputs)); |
| } |
| |
| time(sess.time_passes(), |
| "serialize work products", |
| move || rustc_incremental::save_work_products(sess, crate_name)); |
| |
| if sess.err_count() > 0 { |
| Err(sess.err_count()) |
| } else { |
| Ok(()) |
| } |
| } |
| |
| /// Run the linker on any artifacts that resulted from the LLVM run. |
| /// This should produce either a finished executable or library. |
| pub fn phase_6_link_output(sess: &Session, |
| trans: &trans::CrateTranslation, |
| outputs: &OutputFilenames) { |
| time(sess.time_passes(), |
| "linking", |
| || link::link_binary(sess, trans, outputs, &trans.link.crate_name)); |
| } |
| |
| 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 = 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<String> = sess.codemap() |
| .files |
| .borrow() |
| .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<config::CrateType> { |
| // Unconditionally collect crate types from attributes to make them used |
| let attr_types: Vec<config::CrateType> = |
| 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 == "bin" => Some(config::CrateTypeExecutable), |
| Some(_) => { |
| session.add_lint(lint::builtin::UNKNOWN_CRATE_TYPES, |
| ast::CRATE_NODE_ID, |
| a.span, |
| "invalid `crate_type` value".to_string()); |
| 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(link::default_output_for_target(session)); |
| } |
| base.sort(); |
| base.dedup(); |
| } |
| |
| base.into_iter() |
| .filter(|crate_type| { |
| let res = !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) -> String { |
| let mut hasher = Sha256::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.input_str("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.input_str(&format!("{}", s.len())[..]); |
| hasher.input_str(&s[..]); |
| } |
| |
| let mut hash = hasher.result_str(); |
| |
| // If this is an executable, add a special suffix, so that we don't get |
| // symbol conflicts when linking against a library of the same name. |
| if session.crate_types.borrow().contains(&config::CrateTypeExecutable) { |
| hash.push_str("-exe"); |
| } |
| |
| hash |
| } |
| |
| pub fn build_output_filenames(input: &Input, |
| odir: &Option<PathBuf>, |
| ofile: &Option<PathBuf>, |
| 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("ignoring specified output filename because multiple outputs were \ |
| requested"); |
| 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(), |
| } |
| } |
| } |
| } |
| |
| // For use by the `rusti` project (https://github.com/murarth/rusti). |
| pub fn reset_thread_local_state() { |
| // These may be left in an incoherent state after a previous compile. |
| syntax::ext::hygiene::reset_hygiene_data(); |
| // `clear_ident_interner` can be used to free memory, but it does not restore the initial state. |
| token::reset_ident_interner(); |
| } |
