2 pub use crate::passes::BoxedResolver;
5 use rustc::session::early_error;
6 use rustc::session::config::{self, Input, ErrorOutputType};
7 use rustc::session::{DiagnosticOutput, Session};
8 use rustc::util::common::ErrorReported;
9 use rustc_codegen_utils::codegen_backend::CodegenBackend;
10 use rustc_data_structures::OnDrop;
11 use rustc_data_structures::sync::Lrc;
12 use rustc_data_structures::fx::{FxHashSet, FxHashMap};
13 use rustc_errors::registry::Registry;
14 use rustc_parse::new_parser_from_source_str;
16 use std::path::PathBuf;
18 use std::sync::{Arc, Mutex};
19 use syntax::ast::{self, MetaItemKind};
21 use syntax::source_map::{FileName, FileLoader, SourceMap};
22 use syntax::sess::ParseSess;
23 use syntax_pos::edition;
25 pub type Result<T> = result::Result<T, ErrorReported>;
27 /// Represents a compiler session.
28 /// Can be used to run `rustc_interface` queries.
29 /// Created by passing `Config` to `run_compiler`.
31 pub(crate) sess: Lrc<Session>,
32 codegen_backend: Lrc<Box<dyn CodegenBackend>>,
33 source_map: Lrc<SourceMap>,
34 pub(crate) input: Input,
35 pub(crate) input_path: Option<PathBuf>,
36 pub(crate) output_dir: Option<PathBuf>,
37 pub(crate) output_file: Option<PathBuf>,
38 pub(crate) crate_name: Option<String>,
39 pub(crate) register_lints: Option<Box<dyn Fn(&Session, &mut lint::LintStore) + Send + Sync>>,
40 pub(crate) override_queries:
41 Option<fn(&Session, &mut ty::query::Providers<'_>, &mut ty::query::Providers<'_>)>,
45 pub fn session(&self) -> &Lrc<Session> {
48 pub fn codegen_backend(&self) -> &Lrc<Box<dyn CodegenBackend>> {
51 pub fn source_map(&self) -> &Lrc<SourceMap> {
54 pub fn input(&self) -> &Input {
57 pub fn output_dir(&self) -> &Option<PathBuf> {
60 pub fn output_file(&self) -> &Option<PathBuf> {
65 /// Converts strings provided as `--cfg [cfgspec]` into a `crate_cfg`.
66 pub fn parse_cfgspecs(cfgspecs: Vec<String>) -> FxHashSet<(String, Option<String>)> {
67 syntax::with_default_globals(move || {
68 let cfg = cfgspecs.into_iter().map(|s| {
69 let sess = ParseSess::with_silent_emitter();
70 let filename = FileName::cfg_spec_source_code(&s);
71 let mut parser = new_parser_from_source_str(&sess, filename, s.to_string());
73 macro_rules! error {($reason: expr) => {
74 early_error(ErrorOutputType::default(),
75 &format!(concat!("invalid `--cfg` argument: `{}` (", $reason, ")"), s));
78 match &mut parser.parse_meta_item() {
79 Ok(meta_item) if parser.token == token::Eof => {
80 if meta_item.path.segments.len() != 1 {
81 error!("argument key must be an identifier");
83 match &meta_item.kind {
84 MetaItemKind::List(..) => {
85 error!(r#"expected `key` or `key="value"`"#);
87 MetaItemKind::NameValue(lit) if !lit.kind.is_str() => {
88 error!("argument value must be a string");
90 MetaItemKind::NameValue(..) | MetaItemKind::Word => {
91 let ident = meta_item.ident().expect("multi-segment cfg key");
92 return (ident.name, meta_item.value_str());
97 Err(err) => err.cancel(),
100 error!(r#"expected `key` or `key="value"`"#);
101 }).collect::<ast::CrateConfig>();
102 cfg.into_iter().map(|(a, b)| {
103 (a.to_string(), b.map(|b| b.to_string()))
108 /// The compiler configuration
110 /// Command line options
111 pub opts: config::Options,
113 /// cfg! configuration in addition to the default ones
114 pub crate_cfg: FxHashSet<(String, Option<String>)>,
117 pub input_path: Option<PathBuf>,
118 pub output_dir: Option<PathBuf>,
119 pub output_file: Option<PathBuf>,
120 pub file_loader: Option<Box<dyn FileLoader + Send + Sync>>,
121 pub diagnostic_output: DiagnosticOutput,
123 /// Set to capture stderr output during compiler execution
124 pub stderr: Option<Arc<Mutex<Vec<u8>>>>,
126 pub crate_name: Option<String>,
127 pub lint_caps: FxHashMap<lint::LintId, lint::Level>,
129 /// This is a callback from the driver that is called when we're registering lints;
130 /// it is called during plugin registration when we have the LintStore in a non-shared state.
132 /// Note that if you find a Some here you probably want to call that function in the new
133 /// function being registered.
134 pub register_lints: Option<Box<dyn Fn(&Session, &mut lint::LintStore) + Send + Sync>>,
136 /// This is a callback from the driver that is called just after we have populated
137 /// the list of queries.
139 /// The second parameter is local providers and the third parameter is external providers.
140 pub override_queries:
141 Option<fn(&Session, &mut ty::query::Providers<'_>, &mut ty::query::Providers<'_>)>,
143 /// Registry of diagnostics codes.
144 pub registry: Registry,
147 pub fn run_compiler_in_existing_thread_pool<R>(
149 f: impl FnOnce(&Compiler) -> R,
151 let registry = &config.registry;
152 let (sess, codegen_backend, source_map) = util::create_session(
155 config.diagnostic_output,
157 config.input_path.clone(),
162 let compiler = Compiler {
167 input_path: config.input_path,
168 output_dir: config.output_dir,
169 output_file: config.output_file,
170 crate_name: config.crate_name,
171 register_lints: config.register_lints,
172 override_queries: config.override_queries,
175 let _sess_abort_error = OnDrop(|| {
176 compiler.sess.diagnostic().print_error_count(registry);
182 pub fn run_compiler<R: Send>(mut config: Config, f: impl FnOnce(&Compiler) -> R + Send) -> R {
183 let stderr = config.stderr.take();
184 util::spawn_thread_pool(
186 config.opts.debugging_opts.threads,
188 || run_compiler_in_existing_thread_pool(config, f),
192 pub fn default_thread_pool<R: Send>(edition: edition::Edition, f: impl FnOnce() -> R + Send) -> R {
193 // the 1 here is duplicating code in config.opts.debugging_opts.threads
194 // which also defaults to 1; it ultimately doesn't matter as the default
195 // isn't threaded, and just ignores this parameter
196 util::spawn_thread_pool(edition, 1, &None, f)