1#![allow(internal_features)]
9#![allow(rustc::untranslatable_diagnostic)] #![cfg_attr(bootstrap, feature(let_chains))]
11#![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
12#![doc(rust_logo)]
13#![feature(decl_macro)]
14#![feature(panic_backtrace_config)]
15#![feature(panic_update_hook)]
16#![feature(result_flattening)]
17#![feature(rustdoc_internals)]
18#![feature(try_blocks)]
19use std::cmp::max;
22use std::collections::{BTreeMap, BTreeSet};
23use std::ffi::OsString;
24use std::fmt::Write as _;
25use std::fs::{self, File};
26use std::io::{self, IsTerminal, Read, Write};
27use std::panic::{self, PanicHookInfo, catch_unwind};
28use std::path::{Path, PathBuf};
29use std::process::{self, Command, Stdio};
30use std::sync::OnceLock;
31use std::sync::atomic::{AtomicBool, Ordering};
32use std::time::Instant;
33use std::{env, str};
34
35use rustc_ast as ast;
36use rustc_codegen_ssa::traits::CodegenBackend;
37use rustc_codegen_ssa::{CodegenErrors, CodegenResults};
38use rustc_data_structures::profiling::{
39 TimePassesFormat, get_resident_set_size, print_time_passes_entry,
40};
41use rustc_errors::emitter::stderr_destination;
42use rustc_errors::registry::Registry;
43use rustc_errors::{ColorConfig, DiagCtxt, ErrCode, FatalError, PResult, markdown};
44use rustc_feature::find_gated_cfg;
45use rustc_index as _;
49use rustc_interface::util::{self, get_codegen_backend};
50use rustc_interface::{Linker, create_and_enter_global_ctxt, interface, passes};
51use rustc_lint::unerased_lint_store;
52use rustc_metadata::creader::MetadataLoader;
53use rustc_metadata::locator;
54use rustc_middle::ty::TyCtxt;
55use rustc_parse::{new_parser_from_file, new_parser_from_source_str, unwrap_or_emit_fatal};
56use rustc_session::config::{
57 CG_OPTIONS, ErrorOutputType, Input, OptionDesc, OutFileName, OutputType, UnstableOptions,
58 Z_OPTIONS, nightly_options, parse_target_triple,
59};
60use rustc_session::getopts::{self, Matches};
61use rustc_session::lint::{Lint, LintId};
62use rustc_session::output::{CRATE_TYPES, collect_crate_types, invalid_output_for_target};
63use rustc_session::{EarlyDiagCtxt, Session, config, filesearch};
64use rustc_span::FileName;
65use rustc_span::def_id::LOCAL_CRATE;
66use rustc_target::json::ToJson;
67use rustc_target::spec::{Target, TargetTuple};
68use tracing::trace;
69
70#[allow(unused_macros)]
71macro do_not_use_print($($t:tt)*) {
72 std::compile_error!(
73 "Don't use `print` or `println` here, use `safe_print` or `safe_println` instead"
74 )
75}
76
77#[allow(unused_macros)]
78macro do_not_use_safe_print($($t:tt)*) {
79 std::compile_error!("Don't use `safe_print` or `safe_println` here, use `println_info` instead")
80}
81
82#[allow(unused_imports)]
86use {do_not_use_print as print, do_not_use_print as println};
87
88pub mod args;
89pub mod pretty;
90#[macro_use]
91mod print;
92mod session_diagnostics;
93
94#[cfg(all(not(miri), unix, any(target_env = "gnu", target_os = "macos")))]
98mod signal_handler;
99
100#[cfg(not(all(not(miri), unix, any(target_env = "gnu", target_os = "macos"))))]
101mod signal_handler {
102 pub(super) fn install() {}
105}
106
107use crate::session_diagnostics::{
108 CantEmitMIR, RLinkEmptyVersionNumber, RLinkEncodingVersionMismatch, RLinkRustcVersionMismatch,
109 RLinkWrongFileType, RlinkCorruptFile, RlinkNotAFile, RlinkUnableToRead, UnstableFeatureUsage,
110};
111
112rustc_fluent_macro::fluent_messages! { "../messages.ftl" }
113
114pub static DEFAULT_LOCALE_RESOURCES: &[&str] = &[
115 crate::DEFAULT_LOCALE_RESOURCE,
117 rustc_ast_lowering::DEFAULT_LOCALE_RESOURCE,
118 rustc_ast_passes::DEFAULT_LOCALE_RESOURCE,
119 rustc_attr_parsing::DEFAULT_LOCALE_RESOURCE,
120 rustc_borrowck::DEFAULT_LOCALE_RESOURCE,
121 rustc_builtin_macros::DEFAULT_LOCALE_RESOURCE,
122 rustc_codegen_ssa::DEFAULT_LOCALE_RESOURCE,
123 rustc_const_eval::DEFAULT_LOCALE_RESOURCE,
124 rustc_errors::DEFAULT_LOCALE_RESOURCE,
125 rustc_expand::DEFAULT_LOCALE_RESOURCE,
126 rustc_hir_analysis::DEFAULT_LOCALE_RESOURCE,
127 rustc_hir_typeck::DEFAULT_LOCALE_RESOURCE,
128 rustc_incremental::DEFAULT_LOCALE_RESOURCE,
129 rustc_infer::DEFAULT_LOCALE_RESOURCE,
130 rustc_interface::DEFAULT_LOCALE_RESOURCE,
131 rustc_lint::DEFAULT_LOCALE_RESOURCE,
132 rustc_metadata::DEFAULT_LOCALE_RESOURCE,
133 rustc_middle::DEFAULT_LOCALE_RESOURCE,
134 rustc_mir_build::DEFAULT_LOCALE_RESOURCE,
135 rustc_mir_dataflow::DEFAULT_LOCALE_RESOURCE,
136 rustc_mir_transform::DEFAULT_LOCALE_RESOURCE,
137 rustc_monomorphize::DEFAULT_LOCALE_RESOURCE,
138 rustc_parse::DEFAULT_LOCALE_RESOURCE,
139 rustc_passes::DEFAULT_LOCALE_RESOURCE,
140 rustc_pattern_analysis::DEFAULT_LOCALE_RESOURCE,
141 rustc_privacy::DEFAULT_LOCALE_RESOURCE,
142 rustc_query_system::DEFAULT_LOCALE_RESOURCE,
143 rustc_resolve::DEFAULT_LOCALE_RESOURCE,
144 rustc_session::DEFAULT_LOCALE_RESOURCE,
145 rustc_trait_selection::DEFAULT_LOCALE_RESOURCE,
146 rustc_ty_utils::DEFAULT_LOCALE_RESOURCE,
147 ];
149
150pub const EXIT_SUCCESS: i32 = 0;
152
153pub const EXIT_FAILURE: i32 = 1;
155
156pub const DEFAULT_BUG_REPORT_URL: &str = "https://github.com/rust-lang/rust/issues/new\
157 ?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md";
158
159pub trait Callbacks {
160 fn config(&mut self, _config: &mut interface::Config) {}
162 fn after_crate_root_parsing(
166 &mut self,
167 _compiler: &interface::Compiler,
168 _krate: &mut ast::Crate,
169 ) -> Compilation {
170 Compilation::Continue
171 }
172 fn after_expansion<'tcx>(
175 &mut self,
176 _compiler: &interface::Compiler,
177 _tcx: TyCtxt<'tcx>,
178 ) -> Compilation {
179 Compilation::Continue
180 }
181 fn after_analysis<'tcx>(
184 &mut self,
185 _compiler: &interface::Compiler,
186 _tcx: TyCtxt<'tcx>,
187 ) -> Compilation {
188 Compilation::Continue
189 }
190}
191
192#[derive(Default)]
193pub struct TimePassesCallbacks {
194 time_passes: Option<TimePassesFormat>,
195}
196
197impl Callbacks for TimePassesCallbacks {
198 #[allow(rustc::bad_opt_access)]
200 fn config(&mut self, config: &mut interface::Config) {
201 self.time_passes = (config.opts.prints.is_empty() && config.opts.unstable_opts.time_passes)
205 .then(|| config.opts.unstable_opts.time_passes_format);
206 config.opts.trimmed_def_paths = true;
207 }
208}
209
210pub fn diagnostics_registry() -> Registry {
211 Registry::new(rustc_errors::codes::DIAGNOSTICS)
212}
213
214pub fn run_compiler(at_args: &[String], callbacks: &mut (dyn Callbacks + Send)) {
216 let mut default_early_dcx = EarlyDiagCtxt::new(ErrorOutputType::default());
217
218 let at_args = at_args.get(1..).unwrap_or_default();
227
228 let args = args::arg_expand_all(&default_early_dcx, at_args);
229
230 let Some(matches) = handle_options(&default_early_dcx, &args) else {
231 return;
232 };
233
234 let sopts = config::build_session_options(&mut default_early_dcx, &matches);
235 let ice_file = ice_path_with_config(Some(&sopts.unstable_opts)).clone();
237
238 if let Some(ref code) = matches.opt_str("explain") {
239 handle_explain(&default_early_dcx, diagnostics_registry(), code, sopts.color);
240 return;
241 }
242
243 let input = make_input(&default_early_dcx, &matches.free);
244 let has_input = input.is_some();
245 let (odir, ofile) = make_output(&matches);
246
247 drop(default_early_dcx);
248
249 let mut config = interface::Config {
250 opts: sopts,
251 crate_cfg: matches.opt_strs("cfg"),
252 crate_check_cfg: matches.opt_strs("check-cfg"),
253 input: input.unwrap_or(Input::File(PathBuf::new())),
254 output_file: ofile,
255 output_dir: odir,
256 ice_file,
257 file_loader: None,
258 locale_resources: DEFAULT_LOCALE_RESOURCES.to_vec(),
259 lint_caps: Default::default(),
260 psess_created: None,
261 hash_untracked_state: None,
262 register_lints: None,
263 override_queries: None,
264 extra_symbols: Vec::new(),
265 make_codegen_backend: None,
266 registry: diagnostics_registry(),
267 using_internal_features: &USING_INTERNAL_FEATURES,
268 expanded_args: args,
269 };
270
271 callbacks.config(&mut config);
272
273 let registered_lints = config.register_lints.is_some();
274
275 interface::run_compiler(config, |compiler| {
276 let sess = &compiler.sess;
277 let codegen_backend = &*compiler.codegen_backend;
278
279 let early_exit = || {
283 sess.dcx().abort_if_errors();
284 };
285
286 if sess.opts.describe_lints {
290 describe_lints(sess, registered_lints);
291 return early_exit();
292 }
293
294 if print_crate_info(codegen_backend, sess, has_input) == Compilation::Stop {
295 return early_exit();
296 }
297
298 if !has_input {
299 #[allow(rustc::diagnostic_outside_of_impl)]
300 sess.dcx().fatal("no input filename given"); }
302
303 if !sess.opts.unstable_opts.ls.is_empty() {
304 list_metadata(sess, &*codegen_backend.metadata_loader());
305 return early_exit();
306 }
307
308 if sess.opts.unstable_opts.link_only {
309 process_rlink(sess, compiler);
310 return early_exit();
311 }
312
313 let mut krate = passes::parse(sess);
316
317 if let Some(pp_mode) = sess.opts.pretty {
319 if pp_mode.needs_ast_map() {
320 create_and_enter_global_ctxt(compiler, krate, |tcx| {
321 tcx.ensure_ok().early_lint_checks(());
322 pretty::print(sess, pp_mode, pretty::PrintExtra::NeedsAstMap { tcx });
323 passes::write_dep_info(tcx);
324 });
325 } else {
326 pretty::print(sess, pp_mode, pretty::PrintExtra::AfterParsing { krate: &krate });
327 }
328 trace!("finished pretty-printing");
329 return early_exit();
330 }
331
332 if callbacks.after_crate_root_parsing(compiler, &mut krate) == Compilation::Stop {
333 return early_exit();
334 }
335
336 if sess.opts.unstable_opts.parse_crate_root_only {
337 return early_exit();
338 }
339
340 let linker = create_and_enter_global_ctxt(compiler, krate, |tcx| {
341 let early_exit = || {
342 sess.dcx().abort_if_errors();
343 None
344 };
345
346 let _ = tcx.resolver_for_lowering();
348
349 if callbacks.after_expansion(compiler, tcx) == Compilation::Stop {
350 return early_exit();
351 }
352
353 passes::write_dep_info(tcx);
354
355 if sess.opts.output_types.contains_key(&OutputType::DepInfo)
356 && sess.opts.output_types.len() == 1
357 {
358 return early_exit();
359 }
360
361 if sess.opts.unstable_opts.no_analysis {
362 return early_exit();
363 }
364
365 tcx.ensure_ok().analysis(());
366
367 if let Some(metrics_dir) = &sess.opts.unstable_opts.metrics_dir {
368 dump_feature_usage_metrics(tcx, metrics_dir);
369 }
370
371 if callbacks.after_analysis(compiler, tcx) == Compilation::Stop {
372 return early_exit();
373 }
374
375 if tcx.sess.opts.output_types.contains_key(&OutputType::Mir) {
376 if let Err(error) = rustc_mir_transform::dump_mir::emit_mir(tcx) {
377 tcx.dcx().emit_fatal(CantEmitMIR { error });
378 }
379 }
380
381 Some(Linker::codegen_and_build_linker(tcx, &*compiler.codegen_backend))
382 });
383
384 if let Some(linker) = linker {
387 linker.link(sess, codegen_backend);
388 }
389 })
390}
391
392fn dump_feature_usage_metrics(tcxt: TyCtxt<'_>, metrics_dir: &Path) {
393 let hash = tcxt.crate_hash(LOCAL_CRATE);
394 let crate_name = tcxt.crate_name(LOCAL_CRATE);
395 let metrics_file_name = format!("unstable_feature_usage_metrics-{crate_name}-{hash}.json");
396 let metrics_path = metrics_dir.join(metrics_file_name);
397 if let Err(error) = tcxt.features().dump_feature_usage_metrics(metrics_path) {
398 tcxt.dcx().emit_err(UnstableFeatureUsage { error });
402 }
403}
404
405fn make_output(matches: &getopts::Matches) -> (Option<PathBuf>, Option<OutFileName>) {
407 let odir = matches.opt_str("out-dir").map(|o| PathBuf::from(&o));
408 let ofile = matches.opt_str("o").map(|o| match o.as_str() {
409 "-" => OutFileName::Stdout,
410 path => OutFileName::Real(PathBuf::from(path)),
411 });
412 (odir, ofile)
413}
414
415fn make_input(early_dcx: &EarlyDiagCtxt, free_matches: &[String]) -> Option<Input> {
418 match free_matches {
419 [] => None, [ifile] if ifile == "-" => {
421 let mut input = String::new();
423 if io::stdin().read_to_string(&mut input).is_err() {
424 early_dcx
427 .early_fatal("couldn't read from stdin, as it did not contain valid UTF-8");
428 }
429
430 let name = match env::var("UNSTABLE_RUSTDOC_TEST_PATH") {
431 Ok(path) => {
432 let line = env::var("UNSTABLE_RUSTDOC_TEST_LINE").expect(
433 "when UNSTABLE_RUSTDOC_TEST_PATH is set \
434 UNSTABLE_RUSTDOC_TEST_LINE also needs to be set",
435 );
436 let line = isize::from_str_radix(&line, 10)
437 .expect("UNSTABLE_RUSTDOC_TEST_LINE needs to be an number");
438 FileName::doc_test_source_code(PathBuf::from(path), line)
439 }
440 Err(_) => FileName::anon_source_code(&input),
441 };
442
443 Some(Input::Str { name, input })
444 }
445 [ifile] => Some(Input::File(PathBuf::from(ifile))),
446 [ifile1, ifile2, ..] => early_dcx.early_fatal(format!(
447 "multiple input filenames provided (first two filenames are `{}` and `{}`)",
448 ifile1, ifile2
449 )),
450 }
451}
452
453#[derive(Copy, Clone, Debug, Eq, PartialEq)]
455pub enum Compilation {
456 Stop,
457 Continue,
458}
459
460fn handle_explain(early_dcx: &EarlyDiagCtxt, registry: Registry, code: &str, color: ColorConfig) {
461 let upper_cased_code = code.to_ascii_uppercase();
463 if let Ok(code) = upper_cased_code.strip_prefix('E').unwrap_or(&upper_cased_code).parse::<u32>()
464 && let Ok(description) = registry.try_find_description(ErrCode::from_u32(code))
465 {
466 let mut is_in_code_block = false;
467 let mut text = String::new();
468 for line in description.lines() {
470 let indent_level =
471 line.find(|c: char| !c.is_whitespace()).unwrap_or_else(|| line.len());
472 let dedented_line = &line[indent_level..];
473 if dedented_line.starts_with("```") {
474 is_in_code_block = !is_in_code_block;
475 text.push_str(&line[..(indent_level + 3)]);
476 } else if is_in_code_block && dedented_line.starts_with("# ") {
477 continue;
478 } else {
479 text.push_str(line);
480 }
481 text.push('\n');
482 }
483 if io::stdout().is_terminal() {
484 show_md_content_with_pager(&text, color);
485 } else {
486 safe_print!("{text}");
487 }
488 } else {
489 early_dcx.early_fatal(format!("{code} is not a valid error code"));
490 }
491}
492
493fn show_md_content_with_pager(content: &str, color: ColorConfig) {
498 let pager_name = env::var_os("PAGER").unwrap_or_else(|| {
499 if cfg!(windows) { OsString::from("more.com") } else { OsString::from("less") }
500 });
501
502 let mut cmd = Command::new(&pager_name);
503 if pager_name == "less" {
504 cmd.arg("-R"); }
506
507 let pretty_on_pager = match color {
508 ColorConfig::Auto => {
509 ["less", "bat", "batcat", "delta"].iter().any(|v| *v == pager_name)
511 }
512 ColorConfig::Always => true,
513 ColorConfig::Never => false,
514 };
515
516 let pretty_data = {
518 let mdstream = markdown::MdStream::parse_str(content);
519 let bufwtr = markdown::create_stdout_bufwtr();
520 let mut mdbuf = bufwtr.buffer();
521 if mdstream.write_termcolor_buf(&mut mdbuf).is_ok() { Some((bufwtr, mdbuf)) } else { None }
522 };
523
524 let pager_res: Option<()> = try {
526 let mut pager = cmd.stdin(Stdio::piped()).spawn().ok()?;
527
528 let pager_stdin = pager.stdin.as_mut()?;
529 if pretty_on_pager && let Some((_, mdbuf)) = &pretty_data {
530 pager_stdin.write_all(mdbuf.as_slice()).ok()?;
531 } else {
532 pager_stdin.write_all(content.as_bytes()).ok()?;
533 };
534
535 pager.wait().ok()?;
536 };
537 if pager_res.is_some() {
538 return;
539 }
540
541 if let Some((bufwtr, mdbuf)) = &pretty_data
543 && bufwtr.print(&mdbuf).is_ok()
544 {
545 return;
546 }
547
548 safe_print!("{content}");
550}
551
552fn process_rlink(sess: &Session, compiler: &interface::Compiler) {
553 assert!(sess.opts.unstable_opts.link_only);
554 let dcx = sess.dcx();
555 if let Input::File(file) = &sess.io.input {
556 let rlink_data = fs::read(file).unwrap_or_else(|err| {
557 dcx.emit_fatal(RlinkUnableToRead { err });
558 });
559 let (codegen_results, outputs) = match CodegenResults::deserialize_rlink(sess, rlink_data) {
560 Ok((codegen, outputs)) => (codegen, outputs),
561 Err(err) => {
562 match err {
563 CodegenErrors::WrongFileType => dcx.emit_fatal(RLinkWrongFileType),
564 CodegenErrors::EmptyVersionNumber => dcx.emit_fatal(RLinkEmptyVersionNumber),
565 CodegenErrors::EncodingVersionMismatch { version_array, rlink_version } => dcx
566 .emit_fatal(RLinkEncodingVersionMismatch { version_array, rlink_version }),
567 CodegenErrors::RustcVersionMismatch { rustc_version } => {
568 dcx.emit_fatal(RLinkRustcVersionMismatch {
569 rustc_version,
570 current_version: sess.cfg_version,
571 })
572 }
573 CodegenErrors::CorruptFile => {
574 dcx.emit_fatal(RlinkCorruptFile { file });
575 }
576 };
577 }
578 };
579 compiler.codegen_backend.link(sess, codegen_results, &outputs);
580 } else {
581 dcx.emit_fatal(RlinkNotAFile {});
582 }
583}
584
585fn list_metadata(sess: &Session, metadata_loader: &dyn MetadataLoader) {
586 match sess.io.input {
587 Input::File(ref ifile) => {
588 let path = &(*ifile);
589 let mut v = Vec::new();
590 locator::list_file_metadata(
591 &sess.target,
592 path,
593 metadata_loader,
594 &mut v,
595 &sess.opts.unstable_opts.ls,
596 sess.cfg_version,
597 )
598 .unwrap();
599 safe_println!("{}", String::from_utf8(v).unwrap());
600 }
601 Input::Str { .. } => {
602 #[allow(rustc::diagnostic_outside_of_impl)]
603 sess.dcx().fatal("cannot list metadata for stdin");
604 }
605 }
606}
607
608fn print_crate_info(
609 codegen_backend: &dyn CodegenBackend,
610 sess: &Session,
611 parse_attrs: bool,
612) -> Compilation {
613 use rustc_session::config::PrintKind::*;
614 #[allow(unused_imports)]
618 use {do_not_use_safe_print as safe_print, do_not_use_safe_print as safe_println};
619
620 if sess.opts.prints.iter().all(|p| p.kind == NativeStaticLibs || p.kind == LinkArgs) {
623 return Compilation::Continue;
624 }
625
626 let attrs = if parse_attrs {
627 let result = parse_crate_attrs(sess);
628 match result {
629 Ok(attrs) => Some(attrs),
630 Err(parse_error) => {
631 parse_error.emit();
632 return Compilation::Stop;
633 }
634 }
635 } else {
636 None
637 };
638
639 for req in &sess.opts.prints {
640 let mut crate_info = String::new();
641 macro println_info($($arg:tt)*) {
642 crate_info.write_fmt(format_args!("{}\n", format_args!($($arg)*))).unwrap()
643 }
644
645 match req.kind {
646 TargetList => {
647 let mut targets = rustc_target::spec::TARGETS.to_vec();
648 targets.sort_unstable();
649 println_info!("{}", targets.join("\n"));
650 }
651 HostTuple => println_info!("{}", rustc_session::config::host_tuple()),
652 Sysroot => println_info!("{}", sess.sysroot.display()),
653 TargetLibdir => println_info!("{}", sess.target_tlib_path.dir.display()),
654 TargetSpecJson => {
655 println_info!("{}", serde_json::to_string_pretty(&sess.target.to_json()).unwrap());
656 }
657 AllTargetSpecsJson => {
658 let mut targets = BTreeMap::new();
659 for name in rustc_target::spec::TARGETS {
660 let triple = TargetTuple::from_tuple(name);
661 let target = Target::expect_builtin(&triple);
662 targets.insert(name, target.to_json());
663 }
664 println_info!("{}", serde_json::to_string_pretty(&targets).unwrap());
665 }
666 FileNames => {
667 let Some(attrs) = attrs.as_ref() else {
668 return Compilation::Continue;
670 };
671 let t_outputs = rustc_interface::util::build_output_filenames(attrs, sess);
672 let crate_name = passes::get_crate_name(sess, attrs);
673 let crate_types = collect_crate_types(sess, attrs);
674 for &style in &crate_types {
675 let fname = rustc_session::output::filename_for_input(
676 sess, style, crate_name, &t_outputs,
677 );
678 println_info!("{}", fname.as_path().file_name().unwrap().to_string_lossy());
679 }
680 }
681 CrateName => {
682 let Some(attrs) = attrs.as_ref() else {
683 return Compilation::Continue;
685 };
686 println_info!("{}", passes::get_crate_name(sess, attrs));
687 }
688 CrateRootLintLevels => {
689 let Some(attrs) = attrs.as_ref() else {
690 return Compilation::Continue;
692 };
693 let crate_name = passes::get_crate_name(sess, attrs);
694 let lint_store = crate::unerased_lint_store(sess);
695 let registered_tools = rustc_resolve::registered_tools_ast(sess.dcx(), attrs);
696 let features = rustc_expand::config::features(sess, attrs, crate_name);
697 let lint_levels = rustc_lint::LintLevelsBuilder::crate_root(
698 sess,
699 &features,
700 true,
701 lint_store,
702 ®istered_tools,
703 attrs,
704 );
705 for lint in lint_store.get_lints() {
706 if let Some(feature_symbol) = lint.feature_gate
707 && !features.enabled(feature_symbol)
708 {
709 continue;
711 }
712 let level = lint_levels.lint_level(lint).level;
713 println_info!("{}={}", lint.name_lower(), level.as_str());
714 }
715 }
716 Cfg => {
717 let mut cfgs = sess
718 .psess
719 .config
720 .iter()
721 .filter_map(|&(name, value)| {
722 if !sess.is_nightly_build()
724 && find_gated_cfg(|cfg_sym| cfg_sym == name).is_some()
725 {
726 return None;
727 }
728
729 if let Some(value) = value {
730 Some(format!("{name}=\"{value}\""))
731 } else {
732 Some(name.to_string())
733 }
734 })
735 .collect::<Vec<String>>();
736
737 cfgs.sort();
738 for cfg in cfgs {
739 println_info!("{cfg}");
740 }
741 }
742 CheckCfg => {
743 let mut check_cfgs: Vec<String> = Vec::with_capacity(410);
744
745 #[allow(rustc::potential_query_instability)]
747 for (name, expected_values) in &sess.psess.check_config.expecteds {
748 use crate::config::ExpectedValues;
749 match expected_values {
750 ExpectedValues::Any => check_cfgs.push(format!("{name}=any()")),
751 ExpectedValues::Some(values) => {
752 if !values.is_empty() {
753 check_cfgs.extend(values.iter().map(|value| {
754 if let Some(value) = value {
755 format!("{name}=\"{value}\"")
756 } else {
757 name.to_string()
758 }
759 }))
760 } else {
761 check_cfgs.push(format!("{name}="))
762 }
763 }
764 }
765 }
766
767 check_cfgs.sort_unstable();
768 if !sess.psess.check_config.exhaustive_names {
769 if !sess.psess.check_config.exhaustive_values {
770 println_info!("any()=any()");
771 } else {
772 println_info!("any()");
773 }
774 }
775 for check_cfg in check_cfgs {
776 println_info!("{check_cfg}");
777 }
778 }
779 CallingConventions => {
780 let calling_conventions = rustc_abi::all_names();
781 println_info!("{}", calling_conventions.join("\n"));
782 }
783 RelocationModels
784 | CodeModels
785 | TlsModels
786 | TargetCPUs
787 | StackProtectorStrategies
788 | TargetFeatures => {
789 codegen_backend.print(req, &mut crate_info, sess);
790 }
791 NativeStaticLibs => {}
793 LinkArgs => {}
794 SplitDebuginfo => {
795 use rustc_target::spec::SplitDebuginfo::{Off, Packed, Unpacked};
796
797 for split in &[Off, Packed, Unpacked] {
798 if sess.target.options.supported_split_debuginfo.contains(split) {
799 println_info!("{split}");
800 }
801 }
802 }
803 DeploymentTarget => {
804 if sess.target.is_like_darwin {
805 println_info!(
806 "{}={}",
807 rustc_target::spec::apple::deployment_target_env_var(&sess.target.os),
808 sess.apple_deployment_target().fmt_pretty(),
809 )
810 } else {
811 #[allow(rustc::diagnostic_outside_of_impl)]
812 sess.dcx().fatal("only Apple targets currently support deployment version info")
813 }
814 }
815 SupportedCrateTypes => {
816 let supported_crate_types = CRATE_TYPES
817 .iter()
818 .filter(|(_, crate_type)| !invalid_output_for_target(&sess, *crate_type))
819 .map(|(crate_type_sym, _)| *crate_type_sym)
820 .collect::<BTreeSet<_>>();
821 for supported_crate_type in supported_crate_types {
822 println_info!("{}", supported_crate_type.as_str());
823 }
824 }
825 }
826
827 req.out.overwrite(&crate_info, sess);
828 }
829 Compilation::Stop
830}
831
832pub macro version($early_dcx: expr, $binary: literal, $matches: expr) {
836 fn unw(x: Option<&str>) -> &str {
837 x.unwrap_or("unknown")
838 }
839 $crate::version_at_macro_invocation(
840 $early_dcx,
841 $binary,
842 $matches,
843 unw(option_env!("CFG_VERSION")),
844 unw(option_env!("CFG_VER_HASH")),
845 unw(option_env!("CFG_VER_DATE")),
846 unw(option_env!("CFG_RELEASE")),
847 )
848}
849
850#[doc(hidden)] pub fn version_at_macro_invocation(
852 early_dcx: &EarlyDiagCtxt,
853 binary: &str,
854 matches: &getopts::Matches,
855 version: &str,
856 commit_hash: &str,
857 commit_date: &str,
858 release: &str,
859) {
860 let verbose = matches.opt_present("verbose");
861
862 let mut version = version;
863 let mut release = release;
864 let tmp;
865 if let Ok(force_version) = std::env::var("RUSTC_OVERRIDE_VERSION_STRING") {
866 tmp = force_version;
867 version = &tmp;
868 release = &tmp;
869 }
870
871 safe_println!("{binary} {version}");
872
873 if verbose {
874 safe_println!("binary: {binary}");
875 safe_println!("commit-hash: {commit_hash}");
876 safe_println!("commit-date: {commit_date}");
877 safe_println!("host: {}", config::host_tuple());
878 safe_println!("release: {release}");
879
880 get_backend_from_raw_matches(early_dcx, matches).print_version();
881 }
882}
883
884fn usage(verbose: bool, include_unstable_options: bool, nightly_build: bool) {
885 let mut options = getopts::Options::new();
886 for option in config::rustc_optgroups()
887 .iter()
888 .filter(|x| verbose || !x.is_verbose_help_only)
889 .filter(|x| include_unstable_options || x.is_stable())
890 {
891 option.apply(&mut options);
892 }
893 let message = "Usage: rustc [OPTIONS] INPUT";
894 let nightly_help = if nightly_build {
895 "\n -Z help Print unstable compiler options"
896 } else {
897 ""
898 };
899 let verbose_help = if verbose {
900 ""
901 } else {
902 "\n --help -v Print the full set of options rustc accepts"
903 };
904 let at_path = if verbose {
905 " @path Read newline separated options from `path`\n"
906 } else {
907 ""
908 };
909 safe_println!(
910 "{options}{at_path}\nAdditional help:
911 -C help Print codegen options
912 -W help \
913 Print 'lint' options and default settings{nightly}{verbose}\n",
914 options = options.usage(message),
915 at_path = at_path,
916 nightly = nightly_help,
917 verbose = verbose_help
918 );
919}
920
921fn print_wall_help() {
922 safe_println!(
923 "
924The flag `-Wall` does not exist in `rustc`. Most useful lints are enabled by
925default. Use `rustc -W help` to see all available lints. It's more common to put
926warning settings in the crate root using `#![warn(LINT_NAME)]` instead of using
927the command line flag directly.
928"
929 );
930}
931
932pub fn describe_lints(sess: &Session, registered_lints: bool) {
934 safe_println!(
935 "
936Available lint options:
937 -W <foo> Warn about <foo>
938 -A <foo> Allow <foo>
939 -D <foo> Deny <foo>
940 -F <foo> Forbid <foo> (deny <foo> and all attempts to override)
941
942"
943 );
944
945 fn sort_lints(sess: &Session, mut lints: Vec<&'static Lint>) -> Vec<&'static Lint> {
946 lints.sort_by_cached_key(|x: &&Lint| (x.default_level(sess.edition()), x.name));
948 lints
949 }
950
951 fn sort_lint_groups(
952 lints: Vec<(&'static str, Vec<LintId>, bool)>,
953 ) -> Vec<(&'static str, Vec<LintId>)> {
954 let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
955 lints.sort_by_key(|l| l.0);
956 lints
957 }
958
959 let lint_store = unerased_lint_store(sess);
960 let (loaded, builtin): (Vec<_>, _) =
961 lint_store.get_lints().iter().cloned().partition(|&lint| lint.is_externally_loaded);
962 let loaded = sort_lints(sess, loaded);
963 let builtin = sort_lints(sess, builtin);
964
965 let (loaded_groups, builtin_groups): (Vec<_>, _) =
966 lint_store.get_lint_groups().partition(|&(.., p)| p);
967 let loaded_groups = sort_lint_groups(loaded_groups);
968 let builtin_groups = sort_lint_groups(builtin_groups);
969
970 let max_name_len =
971 loaded.iter().chain(&builtin).map(|&s| s.name.chars().count()).max().unwrap_or(0);
972 let padded = |x: &str| {
973 let mut s = " ".repeat(max_name_len - x.chars().count());
974 s.push_str(x);
975 s
976 };
977
978 safe_println!("Lint checks provided by rustc:\n");
979
980 let print_lints = |lints: Vec<&Lint>| {
981 safe_println!(" {} {:7.7} {}", padded("name"), "default", "meaning");
982 safe_println!(" {} {:7.7} {}", padded("----"), "-------", "-------");
983 for lint in lints {
984 let name = lint.name_lower().replace('_', "-");
985 safe_println!(
986 " {} {:7.7} {}",
987 padded(&name),
988 lint.default_level(sess.edition()).as_str(),
989 lint.desc
990 );
991 }
992 safe_println!("\n");
993 };
994
995 print_lints(builtin);
996
997 let max_name_len = max(
998 "warnings".len(),
999 loaded_groups
1000 .iter()
1001 .chain(&builtin_groups)
1002 .map(|&(s, _)| s.chars().count())
1003 .max()
1004 .unwrap_or(0),
1005 );
1006
1007 let padded = |x: &str| {
1008 let mut s = " ".repeat(max_name_len - x.chars().count());
1009 s.push_str(x);
1010 s
1011 };
1012
1013 safe_println!("Lint groups provided by rustc:\n");
1014
1015 let print_lint_groups = |lints: Vec<(&'static str, Vec<LintId>)>, all_warnings| {
1016 safe_println!(" {} sub-lints", padded("name"));
1017 safe_println!(" {} ---------", padded("----"));
1018
1019 if all_warnings {
1020 safe_println!(" {} all lints that are set to issue warnings", padded("warnings"));
1021 }
1022
1023 for (name, to) in lints {
1024 let name = name.to_lowercase().replace('_', "-");
1025 let desc = to
1026 .into_iter()
1027 .map(|x| x.to_string().replace('_', "-"))
1028 .collect::<Vec<String>>()
1029 .join(", ");
1030 safe_println!(" {} {}", padded(&name), desc);
1031 }
1032 safe_println!("\n");
1033 };
1034
1035 print_lint_groups(builtin_groups, true);
1036
1037 match (registered_lints, loaded.len(), loaded_groups.len()) {
1038 (false, 0, _) | (false, _, 0) => {
1039 safe_println!("Lint tools like Clippy can load additional lints and lint groups.");
1040 }
1041 (false, ..) => panic!("didn't load additional lints but got them anyway!"),
1042 (true, 0, 0) => {
1043 safe_println!("This crate does not load any additional lints or lint groups.")
1044 }
1045 (true, l, g) => {
1046 if l > 0 {
1047 safe_println!("Lint checks loaded by this crate:\n");
1048 print_lints(loaded);
1049 }
1050 if g > 0 {
1051 safe_println!("Lint groups loaded by this crate:\n");
1052 print_lint_groups(loaded_groups, false);
1053 }
1054 }
1055 }
1056}
1057
1058pub fn describe_flag_categories(early_dcx: &EarlyDiagCtxt, matches: &Matches) -> bool {
1062 let wall = matches.opt_strs("W");
1064 if wall.iter().any(|x| *x == "all") {
1065 print_wall_help();
1066 return true;
1067 }
1068
1069 let debug_flags = matches.opt_strs("Z");
1071 if debug_flags.iter().any(|x| *x == "help") {
1072 describe_debug_flags();
1073 return true;
1074 }
1075
1076 let cg_flags = matches.opt_strs("C");
1077 if cg_flags.iter().any(|x| *x == "help") {
1078 describe_codegen_flags();
1079 return true;
1080 }
1081
1082 if cg_flags.iter().any(|x| *x == "passes=list") {
1083 get_backend_from_raw_matches(early_dcx, matches).print_passes();
1084 return true;
1085 }
1086
1087 false
1088}
1089
1090fn get_backend_from_raw_matches(
1097 early_dcx: &EarlyDiagCtxt,
1098 matches: &Matches,
1099) -> Box<dyn CodegenBackend> {
1100 let debug_flags = matches.opt_strs("Z");
1101 let backend_name = debug_flags.iter().find_map(|x| x.strip_prefix("codegen-backend="));
1102 let target = parse_target_triple(early_dcx, matches);
1103 let sysroot = filesearch::materialize_sysroot(matches.opt_str("sysroot").map(PathBuf::from));
1104 let target = config::build_target_config(early_dcx, &target, &sysroot);
1105
1106 get_codegen_backend(early_dcx, &sysroot, backend_name, &target)
1107}
1108
1109fn describe_debug_flags() {
1110 safe_println!("\nAvailable options:\n");
1111 print_flag_list("-Z", config::Z_OPTIONS);
1112}
1113
1114fn describe_codegen_flags() {
1115 safe_println!("\nAvailable codegen options:\n");
1116 print_flag_list("-C", config::CG_OPTIONS);
1117}
1118
1119fn print_flag_list<T>(cmdline_opt: &str, flag_list: &[OptionDesc<T>]) {
1120 let max_len =
1121 flag_list.iter().map(|opt_desc| opt_desc.name().chars().count()).max().unwrap_or(0);
1122
1123 for opt_desc in flag_list {
1124 safe_println!(
1125 " {} {:>width$}=val -- {}",
1126 cmdline_opt,
1127 opt_desc.name().replace('_', "-"),
1128 opt_desc.desc(),
1129 width = max_len
1130 );
1131 }
1132}
1133
1134pub fn handle_options(early_dcx: &EarlyDiagCtxt, args: &[String]) -> Option<getopts::Matches> {
1162 let mut options = getopts::Options::new();
1165 let optgroups = config::rustc_optgroups();
1166 for option in &optgroups {
1167 option.apply(&mut options);
1168 }
1169 let matches = options.parse(args).unwrap_or_else(|e| {
1170 let msg: Option<String> = match e {
1171 getopts::Fail::UnrecognizedOption(ref opt) => CG_OPTIONS
1172 .iter()
1173 .map(|opt_desc| ('C', opt_desc.name()))
1174 .chain(Z_OPTIONS.iter().map(|opt_desc| ('Z', opt_desc.name())))
1175 .find(|&(_, name)| *opt == name.replace('_', "-"))
1176 .map(|(flag, _)| format!("{e}. Did you mean `-{flag} {opt}`?")),
1177 getopts::Fail::ArgumentMissing(ref opt) => {
1178 optgroups.iter().find(|option| option.name == opt).map(|option| {
1179 let mut options = getopts::Options::new();
1181 option.apply(&mut options);
1182 options.usage_with_format(|it| {
1185 it.fold(format!("{e}\nUsage:"), |a, b| a + "\n" + &b)
1186 })
1187 })
1188 }
1189 _ => None,
1190 };
1191 early_dcx.early_fatal(msg.unwrap_or_else(|| e.to_string()));
1192 });
1193
1194 nightly_options::check_nightly_options(early_dcx, &matches, &config::rustc_optgroups());
1206
1207 if args.is_empty() || matches.opt_present("h") || matches.opt_present("help") {
1208 let unstable_enabled = nightly_options::is_unstable_enabled(&matches);
1210 let nightly_build = nightly_options::match_is_nightly_build(&matches);
1211 usage(matches.opt_present("verbose"), unstable_enabled, nightly_build);
1212 return None;
1213 }
1214
1215 if describe_flag_categories(early_dcx, &matches) {
1216 return None;
1217 }
1218
1219 if matches.opt_present("version") {
1220 version!(early_dcx, "rustc", &matches);
1221 return None;
1222 }
1223
1224 Some(matches)
1225}
1226
1227fn parse_crate_attrs<'a>(sess: &'a Session) -> PResult<'a, ast::AttrVec> {
1228 let mut parser = unwrap_or_emit_fatal(match &sess.io.input {
1229 Input::File(file) => new_parser_from_file(&sess.psess, file, None),
1230 Input::Str { name, input } => {
1231 new_parser_from_source_str(&sess.psess, name.clone(), input.clone())
1232 }
1233 });
1234 parser.parse_inner_attributes()
1235}
1236
1237pub fn catch_fatal_errors<F: FnOnce() -> R, R>(f: F) -> Result<R, FatalError> {
1243 catch_unwind(panic::AssertUnwindSafe(f)).map_err(|value| {
1244 if value.is::<rustc_errors::FatalErrorMarker>() {
1245 FatalError
1246 } else {
1247 panic::resume_unwind(value);
1248 }
1249 })
1250}
1251
1252pub fn catch_with_exit_code(f: impl FnOnce()) -> i32 {
1255 match catch_fatal_errors(f) {
1256 Ok(()) => EXIT_SUCCESS,
1257 _ => EXIT_FAILURE,
1258 }
1259}
1260
1261static ICE_PATH: OnceLock<Option<PathBuf>> = OnceLock::new();
1262
1263fn ice_path() -> &'static Option<PathBuf> {
1271 ice_path_with_config(None)
1272}
1273
1274fn ice_path_with_config(config: Option<&UnstableOptions>) -> &'static Option<PathBuf> {
1275 if ICE_PATH.get().is_some() && config.is_some() && cfg!(debug_assertions) {
1276 tracing::warn!(
1277 "ICE_PATH has already been initialized -- files may be emitted at unintended paths"
1278 )
1279 }
1280
1281 ICE_PATH.get_or_init(|| {
1282 if !rustc_feature::UnstableFeatures::from_environment(None).is_nightly_build() {
1283 return None;
1284 }
1285 let mut path = match std::env::var_os("RUSTC_ICE") {
1286 Some(s) => {
1287 if s == "0" {
1288 return None;
1290 }
1291 if let Some(unstable_opts) = config && unstable_opts.metrics_dir.is_some() {
1292 tracing::warn!("ignoring -Zerror-metrics in favor of RUSTC_ICE for destination of ICE report files");
1293 }
1294 PathBuf::from(s)
1295 }
1296 None => config
1297 .and_then(|unstable_opts| unstable_opts.metrics_dir.to_owned())
1298 .or_else(|| std::env::current_dir().ok())
1299 .unwrap_or_default(),
1300 };
1301 let file_now = jiff::Zoned::now().strftime("%Y-%m-%dT%H_%M_%S");
1303 let pid = std::process::id();
1304 path.push(format!("rustc-ice-{file_now}-{pid}.txt"));
1305 Some(path)
1306 })
1307}
1308
1309pub static USING_INTERNAL_FEATURES: AtomicBool = AtomicBool::new(false);
1310
1311pub fn install_ice_hook(bug_report_url: &'static str, extra_info: fn(&DiagCtxt)) {
1323 if env::var_os("RUST_BACKTRACE").is_none() {
1330 let ui_testing = std::env::args().any(|arg| arg == "-Zui-testing");
1332 if env!("CFG_RELEASE_CHANNEL") == "dev" && !ui_testing {
1333 panic::set_backtrace_style(panic::BacktraceStyle::Short);
1334 } else {
1335 panic::set_backtrace_style(panic::BacktraceStyle::Full);
1336 }
1337 }
1338
1339 panic::update_hook(Box::new(
1340 move |default_hook: &(dyn Fn(&PanicHookInfo<'_>) + Send + Sync + 'static),
1341 info: &PanicHookInfo<'_>| {
1342 let _guard = io::stderr().lock();
1344 #[cfg(windows)]
1347 if let Some(msg) = info.payload().downcast_ref::<String>() {
1348 if msg.starts_with("failed printing to stdout: ") && msg.ends_with("(os error 232)")
1349 {
1350 let early_dcx = EarlyDiagCtxt::new(ErrorOutputType::default());
1352 let _ = early_dcx.early_err(msg.clone());
1353 return;
1354 }
1355 };
1356
1357 if !info.payload().is::<rustc_errors::DelayedBugPanic>() {
1360 default_hook(info);
1361 eprintln!();
1363
1364 if let Some(ice_path) = ice_path()
1365 && let Ok(mut out) = File::options().create(true).append(true).open(&ice_path)
1366 {
1367 let location = info.location().unwrap();
1369 let msg = match info.payload().downcast_ref::<&'static str>() {
1370 Some(s) => *s,
1371 None => match info.payload().downcast_ref::<String>() {
1372 Some(s) => &s[..],
1373 None => "Box<dyn Any>",
1374 },
1375 };
1376 let thread = std::thread::current();
1377 let name = thread.name().unwrap_or("<unnamed>");
1378 let _ = write!(
1379 &mut out,
1380 "thread '{name}' panicked at {location}:\n\
1381 {msg}\n\
1382 stack backtrace:\n\
1383 {:#}",
1384 std::backtrace::Backtrace::force_capture()
1385 );
1386 }
1387 }
1388
1389 report_ice(info, bug_report_url, extra_info, &USING_INTERNAL_FEATURES);
1391 },
1392 ));
1393}
1394
1395fn report_ice(
1402 info: &panic::PanicHookInfo<'_>,
1403 bug_report_url: &str,
1404 extra_info: fn(&DiagCtxt),
1405 using_internal_features: &AtomicBool,
1406) {
1407 let fallback_bundle =
1408 rustc_errors::fallback_fluent_bundle(crate::DEFAULT_LOCALE_RESOURCES.to_vec(), false);
1409 let emitter = Box::new(rustc_errors::emitter::HumanEmitter::new(
1410 stderr_destination(rustc_errors::ColorConfig::Auto),
1411 fallback_bundle,
1412 ));
1413 let dcx = rustc_errors::DiagCtxt::new(emitter);
1414 let dcx = dcx.handle();
1415
1416 if !info.payload().is::<rustc_errors::ExplicitBug>()
1419 && !info.payload().is::<rustc_errors::DelayedBugPanic>()
1420 {
1421 dcx.emit_err(session_diagnostics::Ice);
1422 }
1423
1424 if using_internal_features.load(std::sync::atomic::Ordering::Relaxed) {
1425 dcx.emit_note(session_diagnostics::IceBugReportInternalFeature);
1426 } else {
1427 dcx.emit_note(session_diagnostics::IceBugReport { bug_report_url });
1428
1429 if rustc_feature::UnstableFeatures::from_environment(None).is_nightly_build() {
1431 dcx.emit_note(session_diagnostics::UpdateNightlyNote);
1432 }
1433 }
1434
1435 let version = util::version_str!().unwrap_or("unknown_version");
1436 let tuple = config::host_tuple();
1437
1438 static FIRST_PANIC: AtomicBool = AtomicBool::new(true);
1439
1440 let file = if let Some(path) = ice_path() {
1441 match crate::fs::File::options().create(true).append(true).open(&path) {
1443 Ok(mut file) => {
1444 dcx.emit_note(session_diagnostics::IcePath { path: path.clone() });
1445 if FIRST_PANIC.swap(false, Ordering::SeqCst) {
1446 let _ = write!(file, "\n\nrustc version: {version}\nplatform: {tuple}");
1447 }
1448 Some(file)
1449 }
1450 Err(err) => {
1451 dcx.emit_warn(session_diagnostics::IcePathError {
1453 path: path.clone(),
1454 error: err.to_string(),
1455 env_var: std::env::var_os("RUSTC_ICE")
1456 .map(PathBuf::from)
1457 .map(|env_var| session_diagnostics::IcePathErrorEnv { env_var }),
1458 });
1459 dcx.emit_note(session_diagnostics::IceVersion { version, triple: tuple });
1460 None
1461 }
1462 }
1463 } else {
1464 dcx.emit_note(session_diagnostics::IceVersion { version, triple: tuple });
1465 None
1466 };
1467
1468 if let Some((flags, excluded_cargo_defaults)) = rustc_session::utils::extra_compiler_flags() {
1469 dcx.emit_note(session_diagnostics::IceFlags { flags: flags.join(" ") });
1470 if excluded_cargo_defaults {
1471 dcx.emit_note(session_diagnostics::IceExcludeCargoDefaults);
1472 }
1473 }
1474
1475 let backtrace = env::var_os("RUST_BACKTRACE").is_some_and(|x| &x != "0");
1477
1478 let limit_frames = if backtrace { None } else { Some(2) };
1479
1480 interface::try_print_query_stack(dcx, limit_frames, file);
1481
1482 extra_info(&dcx);
1485
1486 #[cfg(windows)]
1487 if env::var("RUSTC_BREAK_ON_ICE").is_ok() {
1488 unsafe { windows::Win32::System::Diagnostics::Debug::DebugBreak() };
1490 }
1491}
1492
1493pub fn init_rustc_env_logger(early_dcx: &EarlyDiagCtxt) {
1496 init_logger(early_dcx, rustc_log::LoggerConfig::from_env("RUSTC_LOG"));
1497}
1498
1499pub fn init_logger(early_dcx: &EarlyDiagCtxt, cfg: rustc_log::LoggerConfig) {
1503 if let Err(error) = rustc_log::init_logger(cfg) {
1504 early_dcx.early_fatal(error.to_string());
1505 }
1506}
1507
1508pub fn install_ctrlc_handler() {
1511 #[cfg(all(not(miri), not(target_family = "wasm")))]
1512 ctrlc::set_handler(move || {
1513 rustc_const_eval::CTRL_C_RECEIVED.store(true, Ordering::Relaxed);
1518 std::thread::sleep(std::time::Duration::from_millis(100));
1519 std::process::exit(1);
1520 })
1521 .expect("Unable to install ctrlc handler");
1522}
1523
1524pub fn main() -> ! {
1525 let start_time = Instant::now();
1526 let start_rss = get_resident_set_size();
1527
1528 let early_dcx = EarlyDiagCtxt::new(ErrorOutputType::default());
1529
1530 init_rustc_env_logger(&early_dcx);
1531 signal_handler::install();
1532 let mut callbacks = TimePassesCallbacks::default();
1533 install_ice_hook(DEFAULT_BUG_REPORT_URL, |_| ());
1534 install_ctrlc_handler();
1535
1536 let exit_code =
1537 catch_with_exit_code(|| run_compiler(&args::raw_args(&early_dcx), &mut callbacks));
1538
1539 if let Some(format) = callbacks.time_passes {
1540 let end_rss = get_resident_set_size();
1541 print_time_passes_entry("total", start_time.elapsed(), start_rss, end_rss, format);
1542 }
1543
1544 process::exit(exit_code)
1545}