1#![allow(internal_features)]
9#![allow(rustc::untranslatable_diagnostic)] #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
11#![doc(rust_logo)]
12#![feature(decl_macro)]
13#![feature(panic_backtrace_config)]
14#![feature(panic_update_hook)]
15#![feature(rustdoc_internals)]
16#![feature(try_blocks)]
17use std::cmp::max;
20use std::collections::{BTreeMap, BTreeSet};
21use std::ffi::OsString;
22use std::fmt::Write as _;
23use std::fs::{self, File};
24use std::io::{self, IsTerminal, Read, Write};
25use std::panic::{self, PanicHookInfo, catch_unwind};
26use std::path::{Path, PathBuf};
27use std::process::{self, Command, Stdio};
28use std::sync::OnceLock;
29use std::sync::atomic::{AtomicBool, Ordering};
30use std::time::Instant;
31use std::{env, str};
32
33use rustc_ast as ast;
34use rustc_codegen_ssa::traits::CodegenBackend;
35use rustc_codegen_ssa::{CodegenErrors, CodegenResults};
36use rustc_data_structures::profiling::{
37 TimePassesFormat, get_resident_set_size, print_time_passes_entry,
38};
39use rustc_errors::emitter::stderr_destination;
40use rustc_errors::registry::Registry;
41use rustc_errors::translation::Translator;
42use rustc_errors::{ColorConfig, DiagCtxt, ErrCode, FatalError, PResult, markdown};
43use rustc_feature::find_gated_cfg;
44use rustc_index as _;
48use rustc_interface::util::{self, get_codegen_backend};
49use rustc_interface::{Linker, create_and_enter_global_ctxt, interface, passes};
50use rustc_lint::unerased_lint_store;
51use rustc_metadata::creader::MetadataLoader;
52use rustc_metadata::locator;
53use rustc_middle::ty::TyCtxt;
54use rustc_parse::lexer::StripTokens;
55use rustc_parse::{new_parser_from_file, new_parser_from_source_str, unwrap_or_emit_fatal};
56use rustc_session::config::{
57 CG_OPTIONS, CrateType, ErrorOutputType, Input, OptionDesc, OutFileName, OutputType, Sysroot,
58 UnstableOptions, 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};
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 fn default_translator() -> Translator {
115 Translator::with_fallback_bundle(DEFAULT_LOCALE_RESOURCES.to_vec(), false)
116}
117
118pub static DEFAULT_LOCALE_RESOURCES: &[&str] = &[
119 crate::DEFAULT_LOCALE_RESOURCE,
121 rustc_ast_lowering::DEFAULT_LOCALE_RESOURCE,
122 rustc_ast_passes::DEFAULT_LOCALE_RESOURCE,
123 rustc_attr_parsing::DEFAULT_LOCALE_RESOURCE,
124 rustc_borrowck::DEFAULT_LOCALE_RESOURCE,
125 rustc_builtin_macros::DEFAULT_LOCALE_RESOURCE,
126 rustc_codegen_ssa::DEFAULT_LOCALE_RESOURCE,
127 rustc_const_eval::DEFAULT_LOCALE_RESOURCE,
128 rustc_errors::DEFAULT_LOCALE_RESOURCE,
129 rustc_expand::DEFAULT_LOCALE_RESOURCE,
130 rustc_hir_analysis::DEFAULT_LOCALE_RESOURCE,
131 rustc_hir_typeck::DEFAULT_LOCALE_RESOURCE,
132 rustc_incremental::DEFAULT_LOCALE_RESOURCE,
133 rustc_infer::DEFAULT_LOCALE_RESOURCE,
134 rustc_interface::DEFAULT_LOCALE_RESOURCE,
135 rustc_lint::DEFAULT_LOCALE_RESOURCE,
136 rustc_metadata::DEFAULT_LOCALE_RESOURCE,
137 rustc_middle::DEFAULT_LOCALE_RESOURCE,
138 rustc_mir_build::DEFAULT_LOCALE_RESOURCE,
139 rustc_mir_dataflow::DEFAULT_LOCALE_RESOURCE,
140 rustc_mir_transform::DEFAULT_LOCALE_RESOURCE,
141 rustc_monomorphize::DEFAULT_LOCALE_RESOURCE,
142 rustc_parse::DEFAULT_LOCALE_RESOURCE,
143 rustc_passes::DEFAULT_LOCALE_RESOURCE,
144 rustc_pattern_analysis::DEFAULT_LOCALE_RESOURCE,
145 rustc_privacy::DEFAULT_LOCALE_RESOURCE,
146 rustc_query_system::DEFAULT_LOCALE_RESOURCE,
147 rustc_resolve::DEFAULT_LOCALE_RESOURCE,
148 rustc_session::DEFAULT_LOCALE_RESOURCE,
149 rustc_trait_selection::DEFAULT_LOCALE_RESOURCE,
150 rustc_ty_utils::DEFAULT_LOCALE_RESOURCE,
151 ];
153
154pub const EXIT_SUCCESS: i32 = 0;
156
157pub const EXIT_FAILURE: i32 = 1;
159
160pub const DEFAULT_BUG_REPORT_URL: &str = "https://github.com/rust-lang/rust/issues/new\
161 ?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md";
162
163pub trait Callbacks {
164 fn config(&mut self, _config: &mut interface::Config) {}
166 fn after_crate_root_parsing(
170 &mut self,
171 _compiler: &interface::Compiler,
172 _krate: &mut ast::Crate,
173 ) -> Compilation {
174 Compilation::Continue
175 }
176 fn after_expansion<'tcx>(
179 &mut self,
180 _compiler: &interface::Compiler,
181 _tcx: TyCtxt<'tcx>,
182 ) -> Compilation {
183 Compilation::Continue
184 }
185 fn after_analysis<'tcx>(
188 &mut self,
189 _compiler: &interface::Compiler,
190 _tcx: TyCtxt<'tcx>,
191 ) -> Compilation {
192 Compilation::Continue
193 }
194}
195
196#[derive(Default)]
197pub struct TimePassesCallbacks {
198 time_passes: Option<TimePassesFormat>,
199}
200
201impl Callbacks for TimePassesCallbacks {
202 #[allow(rustc::bad_opt_access)]
204 fn config(&mut self, config: &mut interface::Config) {
205 self.time_passes = (config.opts.prints.is_empty() && config.opts.unstable_opts.time_passes)
209 .then_some(config.opts.unstable_opts.time_passes_format);
210 config.opts.trimmed_def_paths = true;
211 }
212}
213
214pub fn diagnostics_registry() -> Registry {
215 Registry::new(rustc_errors::codes::DIAGNOSTICS)
216}
217
218pub fn run_compiler(at_args: &[String], callbacks: &mut (dyn Callbacks + Send)) {
220 let mut default_early_dcx = EarlyDiagCtxt::new(ErrorOutputType::default());
221
222 let at_args = at_args.get(1..).unwrap_or_default();
231
232 let args = args::arg_expand_all(&default_early_dcx, at_args);
233
234 let Some(matches) = handle_options(&default_early_dcx, &args) else {
235 return;
236 };
237
238 let sopts = config::build_session_options(&mut default_early_dcx, &matches);
239 let ice_file = ice_path_with_config(Some(&sopts.unstable_opts)).clone();
241
242 if let Some(ref code) = matches.opt_str("explain") {
243 handle_explain(&default_early_dcx, diagnostics_registry(), code, sopts.color);
244 return;
245 }
246
247 let input = make_input(&default_early_dcx, &matches.free);
248 let has_input = input.is_some();
249 let (odir, ofile) = make_output(&matches);
250
251 drop(default_early_dcx);
252
253 let mut config = interface::Config {
254 opts: sopts,
255 crate_cfg: matches.opt_strs("cfg"),
256 crate_check_cfg: matches.opt_strs("check-cfg"),
257 input: input.unwrap_or(Input::File(PathBuf::new())),
258 output_file: ofile,
259 output_dir: odir,
260 ice_file,
261 file_loader: None,
262 locale_resources: DEFAULT_LOCALE_RESOURCES.to_vec(),
263 lint_caps: Default::default(),
264 psess_created: None,
265 hash_untracked_state: None,
266 register_lints: None,
267 override_queries: None,
268 extra_symbols: Vec::new(),
269 make_codegen_backend: None,
270 registry: diagnostics_registry(),
271 using_internal_features: &USING_INTERNAL_FEATURES,
272 };
273
274 callbacks.config(&mut config);
275
276 let registered_lints = config.register_lints.is_some();
277
278 interface::run_compiler(config, |compiler| {
279 let sess = &compiler.sess;
280 let codegen_backend = &*compiler.codegen_backend;
281
282 let early_exit = || {
286 sess.dcx().abort_if_errors();
287 };
288
289 if sess.opts.describe_lints {
293 describe_lints(sess, registered_lints);
294 return early_exit();
295 }
296
297 if print_crate_info(codegen_backend, sess, has_input) == Compilation::Stop {
298 return early_exit();
299 }
300
301 if !has_input {
302 #[allow(rustc::diagnostic_outside_of_impl)]
303 sess.dcx().fatal("no input filename given"); }
305
306 if !sess.opts.unstable_opts.ls.is_empty() {
307 list_metadata(sess, &*codegen_backend.metadata_loader());
308 return early_exit();
309 }
310
311 if sess.opts.unstable_opts.link_only {
312 process_rlink(sess, compiler);
313 return early_exit();
314 }
315
316 let mut krate = passes::parse(sess);
319
320 if let Some(pp_mode) = sess.opts.pretty {
322 if pp_mode.needs_ast_map() {
323 create_and_enter_global_ctxt(compiler, krate, |tcx| {
324 tcx.ensure_ok().early_lint_checks(());
325 pretty::print(sess, pp_mode, pretty::PrintExtra::NeedsAstMap { tcx });
326 passes::write_dep_info(tcx);
327 });
328 } else {
329 pretty::print(sess, pp_mode, pretty::PrintExtra::AfterParsing { krate: &krate });
330 }
331 trace!("finished pretty-printing");
332 return early_exit();
333 }
334
335 if callbacks.after_crate_root_parsing(compiler, &mut krate) == Compilation::Stop {
336 return early_exit();
337 }
338
339 if sess.opts.unstable_opts.parse_crate_root_only {
340 return early_exit();
341 }
342
343 let linker = create_and_enter_global_ctxt(compiler, krate, |tcx| {
344 let early_exit = || {
345 sess.dcx().abort_if_errors();
346 None
347 };
348
349 let _ = tcx.resolver_for_lowering();
351
352 if callbacks.after_expansion(compiler, tcx) == Compilation::Stop {
353 return early_exit();
354 }
355
356 passes::write_dep_info(tcx);
357
358 passes::write_interface(tcx);
359
360 if sess.opts.output_types.contains_key(&OutputType::DepInfo)
361 && sess.opts.output_types.len() == 1
362 {
363 return early_exit();
364 }
365
366 if sess.opts.unstable_opts.no_analysis {
367 return early_exit();
368 }
369
370 tcx.ensure_ok().analysis(());
371
372 if let Some(metrics_dir) = &sess.opts.unstable_opts.metrics_dir {
373 dump_feature_usage_metrics(tcx, metrics_dir);
374 }
375
376 if callbacks.after_analysis(compiler, tcx) == Compilation::Stop {
377 return early_exit();
378 }
379
380 if tcx.sess.opts.output_types.contains_key(&OutputType::Mir) {
381 if let Err(error) = rustc_mir_transform::dump_mir::emit_mir(tcx) {
382 tcx.dcx().emit_fatal(CantEmitMIR { error });
383 }
384 }
385
386 Some(Linker::codegen_and_build_linker(tcx, &*compiler.codegen_backend))
387 });
388
389 if let Some(linker) = linker {
392 linker.link(sess, codegen_backend);
393 }
394 })
395}
396
397fn dump_feature_usage_metrics(tcxt: TyCtxt<'_>, metrics_dir: &Path) {
398 let hash = tcxt.crate_hash(LOCAL_CRATE);
399 let crate_name = tcxt.crate_name(LOCAL_CRATE);
400 let metrics_file_name = format!("unstable_feature_usage_metrics-{crate_name}-{hash}.json");
401 let metrics_path = metrics_dir.join(metrics_file_name);
402 if let Err(error) = tcxt.features().dump_feature_usage_metrics(metrics_path) {
403 tcxt.dcx().emit_err(UnstableFeatureUsage { error });
407 }
408}
409
410fn make_output(matches: &getopts::Matches) -> (Option<PathBuf>, Option<OutFileName>) {
412 let odir = matches.opt_str("out-dir").map(|o| PathBuf::from(&o));
413 let ofile = matches.opt_str("o").map(|o| match o.as_str() {
414 "-" => OutFileName::Stdout,
415 path => OutFileName::Real(PathBuf::from(path)),
416 });
417 (odir, ofile)
418}
419
420fn make_input(early_dcx: &EarlyDiagCtxt, free_matches: &[String]) -> Option<Input> {
423 match free_matches {
424 [] => None, [ifile] if ifile == "-" => {
426 let mut input = String::new();
428 if io::stdin().read_to_string(&mut input).is_err() {
429 early_dcx
432 .early_fatal("couldn't read from stdin, as it did not contain valid UTF-8");
433 }
434
435 let name = match env::var("UNSTABLE_RUSTDOC_TEST_PATH") {
436 Ok(path) => {
437 let line = env::var("UNSTABLE_RUSTDOC_TEST_LINE").expect(
438 "when UNSTABLE_RUSTDOC_TEST_PATH is set \
439 UNSTABLE_RUSTDOC_TEST_LINE also needs to be set",
440 );
441 let line = line
442 .parse::<isize>()
443 .expect("UNSTABLE_RUSTDOC_TEST_LINE needs to be a number");
444 FileName::doc_test_source_code(PathBuf::from(path), line)
445 }
446 Err(_) => FileName::anon_source_code(&input),
447 };
448
449 Some(Input::Str { name, input })
450 }
451 [ifile] => Some(Input::File(PathBuf::from(ifile))),
452 [ifile1, ifile2, ..] => early_dcx.early_fatal(format!(
453 "multiple input filenames provided (first two filenames are `{}` and `{}`)",
454 ifile1, ifile2
455 )),
456 }
457}
458
459#[derive(Copy, Clone, Debug, Eq, PartialEq)]
461pub enum Compilation {
462 Stop,
463 Continue,
464}
465
466fn handle_explain(early_dcx: &EarlyDiagCtxt, registry: Registry, code: &str, color: ColorConfig) {
467 let upper_cased_code = code.to_ascii_uppercase();
469 if let Ok(code) = upper_cased_code.strip_prefix('E').unwrap_or(&upper_cased_code).parse::<u32>()
470 && code <= ErrCode::MAX_AS_U32
471 && let Ok(description) = registry.try_find_description(ErrCode::from_u32(code))
472 {
473 let mut is_in_code_block = false;
474 let mut text = String::new();
475 for line in description.lines() {
477 let indent_level = line.find(|c: char| !c.is_whitespace()).unwrap_or(line.len());
478 let dedented_line = &line[indent_level..];
479 if dedented_line.starts_with("```") {
480 is_in_code_block = !is_in_code_block;
481 text.push_str(&line[..(indent_level + 3)]);
482 } else if is_in_code_block && dedented_line.starts_with("# ") {
483 continue;
484 } else {
485 text.push_str(line);
486 }
487 text.push('\n');
488 }
489 if io::stdout().is_terminal() {
490 show_md_content_with_pager(&text, color);
491 } else {
492 safe_print!("{text}");
493 }
494 } else {
495 early_dcx.early_fatal(format!("{code} is not a valid error code"));
496 }
497}
498
499fn show_md_content_with_pager(content: &str, color: ColorConfig) {
504 let pager_name = env::var_os("PAGER").unwrap_or_else(|| {
505 if cfg!(windows) { OsString::from("more.com") } else { OsString::from("less") }
506 });
507
508 let mut cmd = Command::new(&pager_name);
509 if pager_name == "less" {
510 cmd.arg("-R"); }
512
513 let pretty_on_pager = match color {
514 ColorConfig::Auto => {
515 ["less", "bat", "batcat", "delta"].iter().any(|v| *v == pager_name)
517 }
518 ColorConfig::Always => true,
519 ColorConfig::Never => false,
520 };
521
522 let mut pretty_data = {
524 let mdstream = markdown::MdStream::parse_str(content);
525 let bufwtr = markdown::create_stdout_bufwtr();
526 let mut mdbuf = Vec::new();
527 if mdstream.write_anstream_buf(&mut mdbuf).is_ok() { Some((bufwtr, mdbuf)) } else { None }
528 };
529
530 let pager_res: Option<()> = try {
532 let mut pager = cmd.stdin(Stdio::piped()).spawn().ok()?;
533
534 let pager_stdin = pager.stdin.as_mut()?;
535 if pretty_on_pager && let Some((_, mdbuf)) = &pretty_data {
536 pager_stdin.write_all(mdbuf.as_slice()).ok()?;
537 } else {
538 pager_stdin.write_all(content.as_bytes()).ok()?;
539 };
540
541 pager.wait().ok()?;
542 };
543 if pager_res.is_some() {
544 return;
545 }
546
547 if let Some((bufwtr, mdbuf)) = &mut pretty_data
549 && bufwtr.write_all(&mdbuf).is_ok()
550 {
551 return;
552 }
553
554 safe_print!("{content}");
556}
557
558fn process_rlink(sess: &Session, compiler: &interface::Compiler) {
559 assert!(sess.opts.unstable_opts.link_only);
560 let dcx = sess.dcx();
561 if let Input::File(file) = &sess.io.input {
562 let rlink_data = fs::read(file).unwrap_or_else(|err| {
563 dcx.emit_fatal(RlinkUnableToRead { err });
564 });
565 let (codegen_results, metadata, outputs) =
566 match CodegenResults::deserialize_rlink(sess, rlink_data) {
567 Ok((codegen, metadata, outputs)) => (codegen, metadata, outputs),
568 Err(err) => {
569 match err {
570 CodegenErrors::WrongFileType => dcx.emit_fatal(RLinkWrongFileType),
571 CodegenErrors::EmptyVersionNumber => {
572 dcx.emit_fatal(RLinkEmptyVersionNumber)
573 }
574 CodegenErrors::EncodingVersionMismatch { version_array, rlink_version } => {
575 dcx.emit_fatal(RLinkEncodingVersionMismatch {
576 version_array,
577 rlink_version,
578 })
579 }
580 CodegenErrors::RustcVersionMismatch { rustc_version } => {
581 dcx.emit_fatal(RLinkRustcVersionMismatch {
582 rustc_version,
583 current_version: sess.cfg_version,
584 })
585 }
586 CodegenErrors::CorruptFile => {
587 dcx.emit_fatal(RlinkCorruptFile { file });
588 }
589 };
590 }
591 };
592 compiler.codegen_backend.link(sess, codegen_results, metadata, &outputs);
593 } else {
594 dcx.emit_fatal(RlinkNotAFile {});
595 }
596}
597
598fn list_metadata(sess: &Session, metadata_loader: &dyn MetadataLoader) {
599 match sess.io.input {
600 Input::File(ref path) => {
601 let mut v = Vec::new();
602 locator::list_file_metadata(
603 &sess.target,
604 path,
605 metadata_loader,
606 &mut v,
607 &sess.opts.unstable_opts.ls,
608 sess.cfg_version,
609 )
610 .unwrap();
611 safe_println!("{}", String::from_utf8(v).unwrap());
612 }
613 Input::Str { .. } => {
614 #[allow(rustc::diagnostic_outside_of_impl)]
615 sess.dcx().fatal("cannot list metadata for stdin");
616 }
617 }
618}
619
620fn print_crate_info(
621 codegen_backend: &dyn CodegenBackend,
622 sess: &Session,
623 parse_attrs: bool,
624) -> Compilation {
625 use rustc_session::config::PrintKind::*;
626 #[allow(unused_imports)]
630 use {do_not_use_safe_print as safe_print, do_not_use_safe_print as safe_println};
631
632 if sess.opts.prints.iter().all(|p| p.kind == NativeStaticLibs || p.kind == LinkArgs) {
635 return Compilation::Continue;
636 }
637
638 let attrs = if parse_attrs {
639 let result = parse_crate_attrs(sess);
640 match result {
641 Ok(attrs) => Some(attrs),
642 Err(parse_error) => {
643 parse_error.emit();
644 return Compilation::Stop;
645 }
646 }
647 } else {
648 None
649 };
650
651 for req in &sess.opts.prints {
652 let mut crate_info = String::new();
653 macro println_info($($arg:tt)*) {
654 crate_info.write_fmt(format_args!("{}\n", format_args!($($arg)*))).unwrap()
655 }
656
657 match req.kind {
658 TargetList => {
659 let mut targets = rustc_target::spec::TARGETS.to_vec();
660 targets.sort_unstable();
661 println_info!("{}", targets.join("\n"));
662 }
663 HostTuple => println_info!("{}", rustc_session::config::host_tuple()),
664 Sysroot => println_info!("{}", sess.opts.sysroot.path().display()),
665 TargetLibdir => println_info!("{}", sess.target_tlib_path.dir.display()),
666 TargetSpecJson => {
667 println_info!("{}", serde_json::to_string_pretty(&sess.target.to_json()).unwrap());
668 }
669 TargetSpecJsonSchema => {
670 let schema = rustc_target::spec::json_schema();
671 println_info!("{}", serde_json::to_string_pretty(&schema).unwrap());
672 }
673 AllTargetSpecsJson => {
674 let mut targets = BTreeMap::new();
675 for name in rustc_target::spec::TARGETS {
676 let triple = TargetTuple::from_tuple(name);
677 let target = Target::expect_builtin(&triple);
678 targets.insert(name, target.to_json());
679 }
680 println_info!("{}", serde_json::to_string_pretty(&targets).unwrap());
681 }
682 FileNames => {
683 let Some(attrs) = attrs.as_ref() else {
684 return Compilation::Continue;
686 };
687 let t_outputs = rustc_interface::util::build_output_filenames(attrs, sess);
688 let crate_name = passes::get_crate_name(sess, attrs);
689 let crate_types = collect_crate_types(sess, attrs);
690 for &style in &crate_types {
691 let fname = rustc_session::output::filename_for_input(
692 sess, style, crate_name, &t_outputs,
693 );
694 println_info!("{}", fname.as_path().file_name().unwrap().to_string_lossy());
695 }
696 }
697 CrateName => {
698 let Some(attrs) = attrs.as_ref() else {
699 return Compilation::Continue;
701 };
702 println_info!("{}", passes::get_crate_name(sess, attrs));
703 }
704 CrateRootLintLevels => {
705 let Some(attrs) = attrs.as_ref() else {
706 return Compilation::Continue;
708 };
709 let crate_name = passes::get_crate_name(sess, attrs);
710 let lint_store = crate::unerased_lint_store(sess);
711 let registered_tools = rustc_resolve::registered_tools_ast(sess.dcx(), attrs);
712 let features = rustc_expand::config::features(sess, attrs, crate_name);
713 let lint_levels = rustc_lint::LintLevelsBuilder::crate_root(
714 sess,
715 &features,
716 true,
717 lint_store,
718 ®istered_tools,
719 attrs,
720 );
721 for lint in lint_store.get_lints() {
722 if let Some(feature_symbol) = lint.feature_gate
723 && !features.enabled(feature_symbol)
724 {
725 continue;
727 }
728 let level = lint_levels.lint_level(lint).level;
729 println_info!("{}={}", lint.name_lower(), level.as_str());
730 }
731 }
732 Cfg => {
733 let mut cfgs = sess
734 .psess
735 .config
736 .iter()
737 .filter_map(|&(name, value)| {
738 if !sess.is_nightly_build()
740 && find_gated_cfg(|cfg_sym| cfg_sym == name).is_some()
741 {
742 return None;
743 }
744
745 if let Some(value) = value {
746 Some(format!("{name}=\"{value}\""))
747 } else {
748 Some(name.to_string())
749 }
750 })
751 .collect::<Vec<String>>();
752
753 cfgs.sort();
754 for cfg in cfgs {
755 println_info!("{cfg}");
756 }
757 }
758 CheckCfg => {
759 let mut check_cfgs: Vec<String> = Vec::with_capacity(410);
760
761 #[allow(rustc::potential_query_instability)]
763 for (name, expected_values) in &sess.psess.check_config.expecteds {
764 use crate::config::ExpectedValues;
765 match expected_values {
766 ExpectedValues::Any => check_cfgs.push(format!("{name}=any()")),
767 ExpectedValues::Some(values) => {
768 if !values.is_empty() {
769 check_cfgs.extend(values.iter().map(|value| {
770 if let Some(value) = value {
771 format!("{name}=\"{value}\"")
772 } else {
773 name.to_string()
774 }
775 }))
776 } else {
777 check_cfgs.push(format!("{name}="))
778 }
779 }
780 }
781 }
782
783 check_cfgs.sort_unstable();
784 if !sess.psess.check_config.exhaustive_names {
785 if !sess.psess.check_config.exhaustive_values {
786 println_info!("any()=any()");
787 } else {
788 println_info!("any()");
789 }
790 }
791 for check_cfg in check_cfgs {
792 println_info!("{check_cfg}");
793 }
794 }
795 CallingConventions => {
796 let calling_conventions = rustc_abi::all_names();
797 println_info!("{}", calling_conventions.join("\n"));
798 }
799 RelocationModels
800 | CodeModels
801 | TlsModels
802 | TargetCPUs
803 | StackProtectorStrategies
804 | TargetFeatures => {
805 codegen_backend.print(req, &mut crate_info, sess);
806 }
807 NativeStaticLibs => {}
809 LinkArgs => {}
810 SplitDebuginfo => {
811 use rustc_target::spec::SplitDebuginfo::{Off, Packed, Unpacked};
812
813 for split in &[Off, Packed, Unpacked] {
814 if sess.target.options.supported_split_debuginfo.contains(split) {
815 println_info!("{split}");
816 }
817 }
818 }
819 DeploymentTarget => {
820 if sess.target.is_like_darwin {
821 println_info!(
822 "{}={}",
823 rustc_target::spec::apple::deployment_target_env_var(&sess.target.os),
824 sess.apple_deployment_target().fmt_pretty(),
825 )
826 } else {
827 #[allow(rustc::diagnostic_outside_of_impl)]
828 sess.dcx().fatal("only Apple targets currently support deployment version info")
829 }
830 }
831 SupportedCrateTypes => {
832 let supported_crate_types = CRATE_TYPES
833 .iter()
834 .filter(|(_, crate_type)| !invalid_output_for_target(sess, *crate_type))
835 .filter(|(_, crate_type)| *crate_type != CrateType::Sdylib)
836 .map(|(crate_type_sym, _)| *crate_type_sym)
837 .collect::<BTreeSet<_>>();
838 for supported_crate_type in supported_crate_types {
839 println_info!("{}", supported_crate_type.as_str());
840 }
841 }
842 }
843
844 req.out.overwrite(&crate_info, sess);
845 }
846 Compilation::Stop
847}
848
849pub macro version($early_dcx: expr, $binary: literal, $matches: expr) {
853 fn unw(x: Option<&str>) -> &str {
854 x.unwrap_or("unknown")
855 }
856 $crate::version_at_macro_invocation(
857 $early_dcx,
858 $binary,
859 $matches,
860 unw(option_env!("CFG_VERSION")),
861 unw(option_env!("CFG_VER_HASH")),
862 unw(option_env!("CFG_VER_DATE")),
863 unw(option_env!("CFG_RELEASE")),
864 )
865}
866
867#[doc(hidden)] pub fn version_at_macro_invocation(
869 early_dcx: &EarlyDiagCtxt,
870 binary: &str,
871 matches: &getopts::Matches,
872 version: &str,
873 commit_hash: &str,
874 commit_date: &str,
875 release: &str,
876) {
877 let verbose = matches.opt_present("verbose");
878
879 let mut version = version;
880 let mut release = release;
881 let tmp;
882 if let Ok(force_version) = std::env::var("RUSTC_OVERRIDE_VERSION_STRING") {
883 tmp = force_version;
884 version = &tmp;
885 release = &tmp;
886 }
887
888 safe_println!("{binary} {version}");
889
890 if verbose {
891 safe_println!("binary: {binary}");
892 safe_println!("commit-hash: {commit_hash}");
893 safe_println!("commit-date: {commit_date}");
894 safe_println!("host: {}", config::host_tuple());
895 safe_println!("release: {release}");
896
897 get_backend_from_raw_matches(early_dcx, matches).print_version();
898 }
899}
900
901fn usage(verbose: bool, include_unstable_options: bool, nightly_build: bool) {
902 let mut options = getopts::Options::new();
903 for option in config::rustc_optgroups()
904 .iter()
905 .filter(|x| verbose || !x.is_verbose_help_only)
906 .filter(|x| include_unstable_options || x.is_stable())
907 {
908 option.apply(&mut options);
909 }
910 let message = "Usage: rustc [OPTIONS] INPUT";
911 let nightly_help = if nightly_build {
912 "\n -Z help Print unstable compiler options"
913 } else {
914 ""
915 };
916 let verbose_help = if verbose {
917 ""
918 } else {
919 "\n --help -v Print the full set of options rustc accepts"
920 };
921 let at_path = if verbose {
922 " @path Read newline separated options from `path`\n"
923 } else {
924 ""
925 };
926 safe_println!(
927 "{options}{at_path}\nAdditional help:
928 -C help Print codegen options
929 -W help \
930 Print 'lint' options and default settings{nightly}{verbose}\n",
931 options = options.usage(message),
932 at_path = at_path,
933 nightly = nightly_help,
934 verbose = verbose_help
935 );
936}
937
938fn print_wall_help() {
939 safe_println!(
940 "
941The flag `-Wall` does not exist in `rustc`. Most useful lints are enabled by
942default. Use `rustc -W help` to see all available lints. It's more common to put
943warning settings in the crate root using `#![warn(LINT_NAME)]` instead of using
944the command line flag directly.
945"
946 );
947}
948
949pub fn describe_lints(sess: &Session, registered_lints: bool) {
951 safe_println!(
952 "
953Available lint options:
954 -W <foo> Warn about <foo>
955 -A <foo> Allow <foo>
956 -D <foo> Deny <foo>
957 -F <foo> Forbid <foo> (deny <foo> and all attempts to override)
958
959"
960 );
961
962 fn sort_lints(sess: &Session, mut lints: Vec<&'static Lint>) -> Vec<&'static Lint> {
963 lints.sort_by_cached_key(|x: &&Lint| (x.default_level(sess.edition()), x.name));
965 lints
966 }
967
968 fn sort_lint_groups(
969 lints: Vec<(&'static str, Vec<LintId>, bool)>,
970 ) -> Vec<(&'static str, Vec<LintId>)> {
971 let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
972 lints.sort_by_key(|l| l.0);
973 lints
974 }
975
976 let lint_store = unerased_lint_store(sess);
977 let (loaded, builtin): (Vec<_>, _) =
978 lint_store.get_lints().iter().cloned().partition(|&lint| lint.is_externally_loaded);
979 let loaded = sort_lints(sess, loaded);
980 let builtin = sort_lints(sess, builtin);
981
982 let (loaded_groups, builtin_groups): (Vec<_>, _) =
983 lint_store.get_lint_groups().partition(|&(.., p)| p);
984 let loaded_groups = sort_lint_groups(loaded_groups);
985 let builtin_groups = sort_lint_groups(builtin_groups);
986
987 let max_name_len =
988 loaded.iter().chain(&builtin).map(|&s| s.name.chars().count()).max().unwrap_or(0);
989 let padded = |x: &str| {
990 let mut s = " ".repeat(max_name_len - x.chars().count());
991 s.push_str(x);
992 s
993 };
994
995 safe_println!("Lint checks provided by rustc:\n");
996
997 let print_lints = |lints: Vec<&Lint>| {
998 safe_println!(" {} {:7.7} {}", padded("name"), "default", "meaning");
999 safe_println!(" {} {:7.7} {}", padded("----"), "-------", "-------");
1000 for lint in lints {
1001 let name = lint.name_lower().replace('_', "-");
1002 safe_println!(
1003 " {} {:7.7} {}",
1004 padded(&name),
1005 lint.default_level(sess.edition()).as_str(),
1006 lint.desc
1007 );
1008 }
1009 safe_println!("\n");
1010 };
1011
1012 print_lints(builtin);
1013
1014 let max_name_len = max(
1015 "warnings".len(),
1016 loaded_groups
1017 .iter()
1018 .chain(&builtin_groups)
1019 .map(|&(s, _)| s.chars().count())
1020 .max()
1021 .unwrap_or(0),
1022 );
1023
1024 let padded = |x: &str| {
1025 let mut s = " ".repeat(max_name_len - x.chars().count());
1026 s.push_str(x);
1027 s
1028 };
1029
1030 safe_println!("Lint groups provided by rustc:\n");
1031
1032 let print_lint_groups = |lints: Vec<(&'static str, Vec<LintId>)>, all_warnings| {
1033 safe_println!(" {} sub-lints", padded("name"));
1034 safe_println!(" {} ---------", padded("----"));
1035
1036 if all_warnings {
1037 safe_println!(" {} all lints that are set to issue warnings", padded("warnings"));
1038 }
1039
1040 for (name, to) in lints {
1041 let name = name.to_lowercase().replace('_', "-");
1042 let desc = to
1043 .into_iter()
1044 .map(|x| x.to_string().replace('_', "-"))
1045 .collect::<Vec<String>>()
1046 .join(", ");
1047 safe_println!(" {} {}", padded(&name), desc);
1048 }
1049 safe_println!("\n");
1050 };
1051
1052 print_lint_groups(builtin_groups, true);
1053
1054 match (registered_lints, loaded.len(), loaded_groups.len()) {
1055 (false, 0, _) | (false, _, 0) => {
1056 safe_println!("Lint tools like Clippy can load additional lints and lint groups.");
1057 }
1058 (false, ..) => panic!("didn't load additional lints but got them anyway!"),
1059 (true, 0, 0) => {
1060 safe_println!("This crate does not load any additional lints or lint groups.")
1061 }
1062 (true, l, g) => {
1063 if l > 0 {
1064 safe_println!("Lint checks loaded by this crate:\n");
1065 print_lints(loaded);
1066 }
1067 if g > 0 {
1068 safe_println!("Lint groups loaded by this crate:\n");
1069 print_lint_groups(loaded_groups, false);
1070 }
1071 }
1072 }
1073}
1074
1075pub fn describe_flag_categories(early_dcx: &EarlyDiagCtxt, matches: &Matches) -> bool {
1079 let wall = matches.opt_strs("W");
1081 if wall.iter().any(|x| *x == "all") {
1082 print_wall_help();
1083 return true;
1084 }
1085
1086 let debug_flags = matches.opt_strs("Z");
1088 if debug_flags.iter().any(|x| *x == "help") {
1089 describe_debug_flags();
1090 return true;
1091 }
1092
1093 let cg_flags = matches.opt_strs("C");
1094 if cg_flags.iter().any(|x| *x == "help") {
1095 describe_codegen_flags();
1096 return true;
1097 }
1098
1099 if cg_flags.iter().any(|x| *x == "passes=list") {
1100 get_backend_from_raw_matches(early_dcx, matches).print_passes();
1101 return true;
1102 }
1103
1104 false
1105}
1106
1107fn get_backend_from_raw_matches(
1114 early_dcx: &EarlyDiagCtxt,
1115 matches: &Matches,
1116) -> Box<dyn CodegenBackend> {
1117 let debug_flags = matches.opt_strs("Z");
1118 let backend_name = debug_flags
1119 .iter()
1120 .find_map(|x| x.strip_prefix("codegen-backend=").or(x.strip_prefix("codegen_backend=")));
1121 let target = parse_target_triple(early_dcx, matches);
1122 let sysroot = Sysroot::new(matches.opt_str("sysroot").map(PathBuf::from));
1123 let target = config::build_target_config(early_dcx, &target, sysroot.path());
1124
1125 get_codegen_backend(early_dcx, &sysroot, backend_name, &target)
1126}
1127
1128fn describe_debug_flags() {
1129 safe_println!("\nAvailable options:\n");
1130 print_flag_list("-Z", config::Z_OPTIONS);
1131}
1132
1133fn describe_codegen_flags() {
1134 safe_println!("\nAvailable codegen options:\n");
1135 print_flag_list("-C", config::CG_OPTIONS);
1136}
1137
1138fn print_flag_list<T>(cmdline_opt: &str, flag_list: &[OptionDesc<T>]) {
1139 let max_len =
1140 flag_list.iter().map(|opt_desc| opt_desc.name().chars().count()).max().unwrap_or(0);
1141
1142 for opt_desc in flag_list {
1143 safe_println!(
1144 " {} {:>width$}=val -- {}",
1145 cmdline_opt,
1146 opt_desc.name().replace('_', "-"),
1147 opt_desc.desc(),
1148 width = max_len
1149 );
1150 }
1151}
1152
1153pub fn handle_options(early_dcx: &EarlyDiagCtxt, args: &[String]) -> Option<getopts::Matches> {
1181 let mut options = getopts::Options::new();
1184 let optgroups = config::rustc_optgroups();
1185 for option in &optgroups {
1186 option.apply(&mut options);
1187 }
1188 let matches = options.parse(args).unwrap_or_else(|e| {
1189 let msg: Option<String> = match e {
1190 getopts::Fail::UnrecognizedOption(ref opt) => CG_OPTIONS
1191 .iter()
1192 .map(|opt_desc| ('C', opt_desc.name()))
1193 .chain(Z_OPTIONS.iter().map(|opt_desc| ('Z', opt_desc.name())))
1194 .find(|&(_, name)| *opt == name.replace('_', "-"))
1195 .map(|(flag, _)| format!("{e}. Did you mean `-{flag} {opt}`?")),
1196 getopts::Fail::ArgumentMissing(ref opt) => {
1197 optgroups.iter().find(|option| option.name == opt).map(|option| {
1198 let mut options = getopts::Options::new();
1200 option.apply(&mut options);
1201 options.usage_with_format(|it| {
1204 it.fold(format!("{e}\nUsage:"), |a, b| a + "\n" + &b)
1205 })
1206 })
1207 }
1208 _ => None,
1209 };
1210 early_dcx.early_fatal(msg.unwrap_or_else(|| e.to_string()));
1211 });
1212
1213 nightly_options::check_nightly_options(early_dcx, &matches, &config::rustc_optgroups());
1225
1226 if args.is_empty() || matches.opt_present("h") || matches.opt_present("help") {
1227 let unstable_enabled = nightly_options::is_unstable_enabled(&matches);
1229 let nightly_build = nightly_options::match_is_nightly_build(&matches);
1230 usage(matches.opt_present("verbose"), unstable_enabled, nightly_build);
1231 return None;
1232 }
1233
1234 if describe_flag_categories(early_dcx, &matches) {
1235 return None;
1236 }
1237
1238 if matches.opt_present("version") {
1239 version!(early_dcx, "rustc", &matches);
1240 return None;
1241 }
1242
1243 warn_on_confusing_output_filename_flag(early_dcx, &matches, args);
1244
1245 Some(matches)
1246}
1247
1248fn warn_on_confusing_output_filename_flag(
1252 early_dcx: &EarlyDiagCtxt,
1253 matches: &getopts::Matches,
1254 args: &[String],
1255) {
1256 fn eq_ignore_separators(s1: &str, s2: &str) -> bool {
1257 let s1 = s1.replace('-', "_");
1258 let s2 = s2.replace('-', "_");
1259 s1 == s2
1260 }
1261
1262 if let Some(name) = matches.opt_str("o")
1263 && let Some(suspect) = args.iter().find(|arg| arg.starts_with("-o") && *arg != "-o")
1264 {
1265 let filename = suspect.strip_prefix("-").unwrap_or(suspect);
1266 let optgroups = config::rustc_optgroups();
1267 let fake_args = ["optimize", "o0", "o1", "o2", "o3", "ofast", "og", "os", "oz"];
1268
1269 if optgroups.iter().any(|option| eq_ignore_separators(option.long_name(), filename))
1276 || config::CG_OPTIONS.iter().any(|option| eq_ignore_separators(option.name(), filename))
1277 || fake_args.iter().any(|arg| eq_ignore_separators(arg, filename))
1278 {
1279 early_dcx.early_warn(
1280 "option `-o` has no space between flag name and value, which can be confusing",
1281 );
1282 early_dcx.early_note(format!(
1283 "output filename `-o {name}` is applied instead of a flag named `o{name}`"
1284 ));
1285 early_dcx.early_help(format!(
1286 "insert a space between `-o` and `{name}` if this is intentional: `-o {name}`"
1287 ));
1288 }
1289 }
1290}
1291
1292fn parse_crate_attrs<'a>(sess: &'a Session) -> PResult<'a, ast::AttrVec> {
1293 let mut parser = unwrap_or_emit_fatal(match &sess.io.input {
1294 Input::File(file) => {
1295 new_parser_from_file(&sess.psess, file, StripTokens::ShebangAndFrontmatter, None)
1296 }
1297 Input::Str { name, input } => new_parser_from_source_str(
1298 &sess.psess,
1299 name.clone(),
1300 input.clone(),
1301 StripTokens::ShebangAndFrontmatter,
1302 ),
1303 });
1304 parser.parse_inner_attributes()
1305}
1306
1307pub fn catch_fatal_errors<F: FnOnce() -> R, R>(f: F) -> Result<R, FatalError> {
1313 catch_unwind(panic::AssertUnwindSafe(f)).map_err(|value| {
1314 if value.is::<rustc_errors::FatalErrorMarker>() {
1315 FatalError
1316 } else {
1317 panic::resume_unwind(value);
1318 }
1319 })
1320}
1321
1322pub fn catch_with_exit_code(f: impl FnOnce()) -> i32 {
1325 match catch_fatal_errors(f) {
1326 Ok(()) => EXIT_SUCCESS,
1327 _ => EXIT_FAILURE,
1328 }
1329}
1330
1331static ICE_PATH: OnceLock<Option<PathBuf>> = OnceLock::new();
1332
1333fn ice_path() -> &'static Option<PathBuf> {
1341 ice_path_with_config(None)
1342}
1343
1344fn ice_path_with_config(config: Option<&UnstableOptions>) -> &'static Option<PathBuf> {
1345 if ICE_PATH.get().is_some() && config.is_some() && cfg!(debug_assertions) {
1346 tracing::warn!(
1347 "ICE_PATH has already been initialized -- files may be emitted at unintended paths"
1348 )
1349 }
1350
1351 ICE_PATH.get_or_init(|| {
1352 if !rustc_feature::UnstableFeatures::from_environment(None).is_nightly_build() {
1353 return None;
1354 }
1355 let mut path = match std::env::var_os("RUSTC_ICE") {
1356 Some(s) => {
1357 if s == "0" {
1358 return None;
1360 }
1361 if let Some(unstable_opts) = config && unstable_opts.metrics_dir.is_some() {
1362 tracing::warn!("ignoring -Zerror-metrics in favor of RUSTC_ICE for destination of ICE report files");
1363 }
1364 PathBuf::from(s)
1365 }
1366 None => config
1367 .and_then(|unstable_opts| unstable_opts.metrics_dir.to_owned())
1368 .or_else(|| std::env::current_dir().ok())
1369 .unwrap_or_default(),
1370 };
1371 let file_now = jiff::Zoned::now().strftime("%Y-%m-%dT%H_%M_%S");
1373 let pid = std::process::id();
1374 path.push(format!("rustc-ice-{file_now}-{pid}.txt"));
1375 Some(path)
1376 })
1377}
1378
1379pub static USING_INTERNAL_FEATURES: AtomicBool = AtomicBool::new(false);
1380
1381pub fn install_ice_hook(bug_report_url: &'static str, extra_info: fn(&DiagCtxt)) {
1393 if env::var_os("RUST_BACKTRACE").is_none() {
1400 let ui_testing = std::env::args().any(|arg| arg == "-Zui-testing");
1402 if env!("CFG_RELEASE_CHANNEL") == "dev" && !ui_testing {
1403 panic::set_backtrace_style(panic::BacktraceStyle::Short);
1404 } else {
1405 panic::set_backtrace_style(panic::BacktraceStyle::Full);
1406 }
1407 }
1408
1409 panic::update_hook(Box::new(
1410 move |default_hook: &(dyn Fn(&PanicHookInfo<'_>) + Send + Sync + 'static),
1411 info: &PanicHookInfo<'_>| {
1412 let _guard = io::stderr().lock();
1414 #[cfg(windows)]
1417 if let Some(msg) = info.payload().downcast_ref::<String>() {
1418 if msg.starts_with("failed printing to stdout: ") && msg.ends_with("(os error 232)")
1419 {
1420 let early_dcx = EarlyDiagCtxt::new(ErrorOutputType::default());
1422 let _ = early_dcx.early_err(msg.clone());
1423 return;
1424 }
1425 };
1426
1427 if !info.payload().is::<rustc_errors::DelayedBugPanic>() {
1430 default_hook(info);
1431 eprintln!();
1433
1434 if let Some(ice_path) = ice_path()
1435 && let Ok(mut out) = File::options().create(true).append(true).open(ice_path)
1436 {
1437 let location = info.location().unwrap();
1439 let msg = match info.payload().downcast_ref::<&'static str>() {
1440 Some(s) => *s,
1441 None => match info.payload().downcast_ref::<String>() {
1442 Some(s) => &s[..],
1443 None => "Box<dyn Any>",
1444 },
1445 };
1446 let thread = std::thread::current();
1447 let name = thread.name().unwrap_or("<unnamed>");
1448 let _ = write!(
1449 &mut out,
1450 "thread '{name}' panicked at {location}:\n\
1451 {msg}\n\
1452 stack backtrace:\n\
1453 {:#}",
1454 std::backtrace::Backtrace::force_capture()
1455 );
1456 }
1457 }
1458
1459 report_ice(info, bug_report_url, extra_info, &USING_INTERNAL_FEATURES);
1461 },
1462 ));
1463}
1464
1465fn report_ice(
1472 info: &panic::PanicHookInfo<'_>,
1473 bug_report_url: &str,
1474 extra_info: fn(&DiagCtxt),
1475 using_internal_features: &AtomicBool,
1476) {
1477 let translator = default_translator();
1478 let emitter = Box::new(rustc_errors::emitter::HumanEmitter::new(
1479 stderr_destination(rustc_errors::ColorConfig::Auto),
1480 translator,
1481 ));
1482 let dcx = rustc_errors::DiagCtxt::new(emitter);
1483 let dcx = dcx.handle();
1484
1485 if !info.payload().is::<rustc_errors::ExplicitBug>()
1488 && !info.payload().is::<rustc_errors::DelayedBugPanic>()
1489 {
1490 dcx.emit_err(session_diagnostics::Ice);
1491 }
1492
1493 if using_internal_features.load(std::sync::atomic::Ordering::Relaxed) {
1494 dcx.emit_note(session_diagnostics::IceBugReportInternalFeature);
1495 } else {
1496 dcx.emit_note(session_diagnostics::IceBugReport { bug_report_url });
1497
1498 if rustc_feature::UnstableFeatures::from_environment(None).is_nightly_build() {
1500 dcx.emit_note(session_diagnostics::UpdateNightlyNote);
1501 }
1502 }
1503
1504 let version = util::version_str!().unwrap_or("unknown_version");
1505 let tuple = config::host_tuple();
1506
1507 static FIRST_PANIC: AtomicBool = AtomicBool::new(true);
1508
1509 let file = if let Some(path) = ice_path() {
1510 match crate::fs::File::options().create(true).append(true).open(path) {
1512 Ok(mut file) => {
1513 dcx.emit_note(session_diagnostics::IcePath { path: path.clone() });
1514 if FIRST_PANIC.swap(false, Ordering::SeqCst) {
1515 let _ = write!(file, "\n\nrustc version: {version}\nplatform: {tuple}");
1516 }
1517 Some(file)
1518 }
1519 Err(err) => {
1520 dcx.emit_warn(session_diagnostics::IcePathError {
1522 path: path.clone(),
1523 error: err.to_string(),
1524 env_var: std::env::var_os("RUSTC_ICE")
1525 .map(PathBuf::from)
1526 .map(|env_var| session_diagnostics::IcePathErrorEnv { env_var }),
1527 });
1528 dcx.emit_note(session_diagnostics::IceVersion { version, triple: tuple });
1529 None
1530 }
1531 }
1532 } else {
1533 dcx.emit_note(session_diagnostics::IceVersion { version, triple: tuple });
1534 None
1535 };
1536
1537 if let Some((flags, excluded_cargo_defaults)) = rustc_session::utils::extra_compiler_flags() {
1538 dcx.emit_note(session_diagnostics::IceFlags { flags: flags.join(" ") });
1539 if excluded_cargo_defaults {
1540 dcx.emit_note(session_diagnostics::IceExcludeCargoDefaults);
1541 }
1542 }
1543
1544 let backtrace = env::var_os("RUST_BACKTRACE").is_some_and(|x| &x != "0");
1546
1547 let limit_frames = if backtrace { None } else { Some(2) };
1548
1549 interface::try_print_query_stack(dcx, limit_frames, file);
1550
1551 extra_info(&dcx);
1554
1555 #[cfg(windows)]
1556 if env::var("RUSTC_BREAK_ON_ICE").is_ok() {
1557 unsafe { windows::Win32::System::Diagnostics::Debug::DebugBreak() };
1559 }
1560}
1561
1562pub fn init_rustc_env_logger(early_dcx: &EarlyDiagCtxt) {
1565 init_logger(early_dcx, rustc_log::LoggerConfig::from_env("RUSTC_LOG"));
1566}
1567
1568pub fn init_logger(early_dcx: &EarlyDiagCtxt, cfg: rustc_log::LoggerConfig) {
1572 if let Err(error) = rustc_log::init_logger(cfg) {
1573 early_dcx.early_fatal(error.to_string());
1574 }
1575}
1576
1577pub fn init_logger_with_additional_layer<F, T>(
1583 early_dcx: &EarlyDiagCtxt,
1584 cfg: rustc_log::LoggerConfig,
1585 build_subscriber: F,
1586) where
1587 F: FnOnce() -> T,
1588 T: rustc_log::BuildSubscriberRet,
1589{
1590 if let Err(error) = rustc_log::init_logger_with_additional_layer(cfg, build_subscriber) {
1591 early_dcx.early_fatal(error.to_string());
1592 }
1593}
1594
1595pub fn install_ctrlc_handler() {
1598 #[cfg(all(not(miri), not(target_family = "wasm")))]
1599 ctrlc::set_handler(move || {
1600 rustc_const_eval::CTRL_C_RECEIVED.store(true, Ordering::Relaxed);
1605 std::thread::sleep(std::time::Duration::from_millis(100));
1606 std::process::exit(1);
1607 })
1608 .expect("Unable to install ctrlc handler");
1609}
1610
1611pub fn main() -> ! {
1612 let start_time = Instant::now();
1613 let start_rss = get_resident_set_size();
1614
1615 let early_dcx = EarlyDiagCtxt::new(ErrorOutputType::default());
1616
1617 init_rustc_env_logger(&early_dcx);
1618 signal_handler::install();
1619 let mut callbacks = TimePassesCallbacks::default();
1620 install_ice_hook(DEFAULT_BUG_REPORT_URL, |_| ());
1621 install_ctrlc_handler();
1622
1623 let exit_code =
1624 catch_with_exit_code(|| run_compiler(&args::raw_args(&early_dcx), &mut callbacks));
1625
1626 if let Some(format) = callbacks.time_passes {
1627 let end_rss = get_resident_set_size();
1628 print_time_passes_entry("total", start_time.elapsed(), start_rss, end_rss, format);
1629 }
1630
1631 process::exit(exit_code)
1632}