5 //! This API is completely unstable and subject to change.
7 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
8 html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
9 html_root_url = "https://doc.rust-lang.org/nightly/")]
11 #![feature(box_syntax)]
12 #![cfg_attr(unix, feature(libc))]
15 #![feature(rustc_diagnostic_macros)]
16 #![feature(slice_sort_by_cached_key)]
17 #![feature(set_stdio)]
20 #![recursion_limit="256"]
23 pub extern crate getopts;
24 extern crate graphviz;
25 extern crate env_logger;
28 extern crate rustc_rayon as rayon;
30 extern crate rustc_allocator;
31 extern crate rustc_target;
32 extern crate rustc_borrowck;
33 extern crate rustc_data_structures;
34 extern crate rustc_errors as errors;
35 extern crate rustc_passes;
36 extern crate rustc_lint;
37 extern crate rustc_plugin;
38 extern crate rustc_privacy;
39 extern crate rustc_incremental;
40 extern crate rustc_metadata;
41 extern crate rustc_mir;
42 extern crate rustc_resolve;
43 extern crate rustc_save_analysis;
44 extern crate rustc_traits;
45 extern crate rustc_codegen_utils;
46 extern crate rustc_typeck;
47 extern crate scoped_tls;
48 extern crate serialize;
49 extern crate smallvec;
53 extern crate syntax_ext;
54 extern crate syntax_pos;
56 use driver::CompileController;
57 use pretty::{PpMode, UserIdentifiedItem};
59 use rustc_resolve as resolve;
60 use rustc_save_analysis as save;
61 use rustc_save_analysis::DumpHandler;
62 use rustc_data_structures::sync::{self, Lrc};
63 use rustc_data_structures::OnDrop;
64 use rustc::session::{self, config, Session, build_session, CompileResult};
65 use rustc::session::CompileIncomplete;
66 use rustc::session::config::{Input, PrintRequest, ErrorOutputType};
67 use rustc::session::config::nightly_options;
68 use rustc::session::filesearch;
69 use rustc::session::{early_error, early_warn};
70 use rustc::lint::Lint;
72 use rustc_metadata::locator;
73 use rustc_metadata::cstore::CStore;
74 use rustc_metadata::dynamic_lib::DynamicLibrary;
75 use rustc::util::common::{time, ErrorReported};
76 use rustc_codegen_utils::codegen_backend::CodegenBackend;
78 use serialize::json::ToJson;
83 use std::default::Default;
84 use std::env::consts::{DLL_PREFIX, DLL_SUFFIX};
86 use std::error::Error;
87 use std::ffi::OsString;
88 use std::fmt::{self, Display};
89 use std::io::{self, Read, Write};
92 use std::path::{PathBuf, Path};
93 use std::process::{self, Command, Stdio};
95 use std::sync::atomic::{AtomicBool, ATOMIC_BOOL_INIT, Ordering};
96 use std::sync::{Once, ONCE_INIT};
100 use syntax::source_map::{SourceMap, FileLoader, RealFileLoader};
101 use syntax::feature_gate::{GatedCfg, UnstableFeatures};
102 use syntax::parse::{self, PResult};
103 use syntax_pos::{DUMMY_SP, MultiSpan, FileName};
111 mod proc_macro_decls;
113 pub mod target_features {
115 use syntax::symbol::Symbol;
116 use rustc::session::Session;
117 use rustc_codegen_utils::codegen_backend::CodegenBackend;
119 /// Add `target_feature = "..."` cfgs for a variety of platform
120 /// specific features (SSE, NEON etc.).
122 /// This is performed by checking whether a whitelisted set of
123 /// features is available on the target machine, by querying LLVM.
124 pub fn add_configuration(cfg: &mut ast::CrateConfig,
126 codegen_backend: &dyn CodegenBackend) {
127 let tf = Symbol::intern("target_feature");
129 cfg.extend(codegen_backend.target_features(sess).into_iter().map(|feat| (tf, Some(feat))));
131 if sess.crt_static_feature() {
132 cfg.insert((tf, Some(Symbol::intern("crt-static"))));
137 /// Exit status code used for successful compilation and help output.
138 pub const EXIT_SUCCESS: isize = 0;
140 /// Exit status code used for compilation failures and invalid flags.
141 pub const EXIT_FAILURE: isize = 1;
143 const BUG_REPORT_URL: &str = "https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.\
146 const ICE_REPORT_COMPILER_FLAGS: &[&str] = &["Z", "C", "crate-type"];
148 const ICE_REPORT_COMPILER_FLAGS_EXCLUDE: &[&str] = &["metadata", "extra-filename"];
150 const ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE: &[&str] = &["incremental"];
152 pub fn abort_on_err<T>(result: Result<T, CompileIncomplete>, sess: &Session) -> T {
154 Err(CompileIncomplete::Errored(ErrorReported)) => {
155 sess.abort_if_errors();
156 panic!("error reported but abort_if_errors didn't abort???");
158 Err(CompileIncomplete::Stopped) => {
159 sess.fatal("compilation terminated");
165 pub fn run<F>(run_compiler: F) -> isize
166 where F: FnOnce() -> (CompileResult, Option<Session>) + Send + 'static
168 let result = monitor(move || {
169 syntax::with_globals(|| {
170 let (result, session) = run_compiler();
171 if let Err(CompileIncomplete::Errored(_)) = result {
174 sess.abort_if_errors();
175 panic!("error reported but abort_if_errors didn't abort???");
179 errors::emitter::EmitterWriter::stderr(
180 errors::ColorConfig::Auto,
185 let handler = errors::Handler::with_emitter(true, false, Box::new(emitter));
186 handler.emit(&MultiSpan::new(),
187 "aborting due to previous error(s)",
188 errors::Level::Fatal);
189 panic::resume_unwind(Box::new(errors::FatalErrorMarker));
197 Ok(()) => EXIT_SUCCESS,
198 Err(_) => EXIT_FAILURE,
202 fn load_backend_from_dylib(path: &Path) -> fn() -> Box<dyn CodegenBackend> {
203 // Note that we're specifically using `open_global_now` here rather than
204 // `open`, namely we want the behavior on Unix of RTLD_GLOBAL and RTLD_NOW,
205 // where NOW means "bind everything right now" because we don't want
206 // surprises later on and RTLD_GLOBAL allows the symbols to be made
207 // available for future dynamic libraries opened. This is currently used by
208 // loading LLVM and then making its symbols available for other dynamic
210 let lib = DynamicLibrary::open_global_now(path).unwrap_or_else(|err| {
211 let err = format!("couldn't load codegen backend {:?}: {:?}", path, err);
212 early_error(ErrorOutputType::default(), &err);
215 match lib.symbol("__rustc_codegen_backend") {
218 mem::transmute::<*mut u8, _>(f)
221 let err = format!("couldn't load codegen backend as it \
222 doesn't export the `__rustc_codegen_backend` \
224 early_error(ErrorOutputType::default(), &err);
230 pub fn get_codegen_backend(sess: &Session) -> Box<dyn CodegenBackend> {
231 static INIT: Once = ONCE_INIT;
235 static mut LOAD: fn() -> Box<dyn CodegenBackend> = || unreachable!();
238 let codegen_name = sess.opts.debugging_opts.codegen_backend.as_ref()
239 .unwrap_or(&sess.target.target.options.codegen_backend);
240 let backend = match &codegen_name[..] {
242 rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::boxed
244 filename if filename.contains(".") => {
245 load_backend_from_dylib(filename.as_ref())
247 codegen_name => get_codegen_sysroot(codegen_name),
254 let backend = unsafe { LOAD() };
259 fn get_codegen_sysroot(backend_name: &str) -> fn() -> Box<dyn CodegenBackend> {
260 // For now we only allow this function to be called once as it'll dlopen a
261 // few things, which seems to work best if we only do that once. In
262 // general this assertion never trips due to the once guard in `get_codegen_backend`,
263 // but there's a few manual calls to this function in this file we protect
265 static LOADED: AtomicBool = ATOMIC_BOOL_INIT;
266 assert!(!LOADED.fetch_or(true, Ordering::SeqCst),
267 "cannot load the default codegen backend twice");
269 // When we're compiling this library with `--test` it'll run as a binary but
270 // not actually exercise much functionality. As a result most of the logic
271 // here is defunkt (it assumes we're a dynamic library in a sysroot) so
272 // let's just return a dummy creation function which won't be used in
275 return rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::boxed
278 let target = session::config::host_triple();
279 let mut sysroot_candidates = vec![filesearch::get_or_default_sysroot()];
280 let path = current_dll_path()
281 .and_then(|s| s.canonicalize().ok());
282 if let Some(dll) = path {
283 // use `parent` twice to chop off the file name and then also the
284 // directory containing the dll which should be either `lib` or `bin`.
285 if let Some(path) = dll.parent().and_then(|p| p.parent()) {
286 // The original `path` pointed at the `rustc_driver` crate's dll.
287 // Now that dll should only be in one of two locations. The first is
288 // in the compiler's libdir, for example `$sysroot/lib/*.dll`. The
289 // other is the target's libdir, for example
290 // `$sysroot/lib/rustlib/$target/lib/*.dll`.
292 // We don't know which, so let's assume that if our `path` above
293 // ends in `$target` we *could* be in the target libdir, and always
294 // assume that we may be in the main libdir.
295 sysroot_candidates.push(path.to_owned());
297 if path.ends_with(target) {
298 sysroot_candidates.extend(path.parent() // chop off `$target`
299 .and_then(|p| p.parent()) // chop off `rustlib`
300 .and_then(|p| p.parent()) // chop off `lib`
301 .map(|s| s.to_owned()));
306 let sysroot = sysroot_candidates.iter()
308 let libdir = filesearch::relative_target_lib_path(&sysroot, &target);
309 sysroot.join(libdir).with_file_name(
310 option_env!("CFG_CODEGEN_BACKENDS_DIR").unwrap_or("codegen-backends"))
313 info!("codegen backend candidate: {}", f.display());
317 let sysroot = sysroot.unwrap_or_else(|| {
318 let candidates = sysroot_candidates.iter()
319 .map(|p| p.display().to_string())
322 let err = format!("failed to find a `codegen-backends` folder \
323 in the sysroot candidates:\n* {}", candidates);
324 early_error(ErrorOutputType::default(), &err);
326 info!("probing {} for a codegen backend", sysroot.display());
328 let d = sysroot.read_dir().unwrap_or_else(|e| {
329 let err = format!("failed to load default codegen backend, couldn't \
330 read `{}`: {}", sysroot.display(), e);
331 early_error(ErrorOutputType::default(), &err);
334 let mut file: Option<PathBuf> = None;
336 let expected_name = format!("rustc_codegen_llvm-{}", backend_name);
337 for entry in d.filter_map(|e| e.ok()) {
338 let path = entry.path();
339 let filename = match path.file_name().and_then(|s| s.to_str()) {
343 if !(filename.starts_with(DLL_PREFIX) && filename.ends_with(DLL_SUFFIX)) {
346 let name = &filename[DLL_PREFIX.len() .. filename.len() - DLL_SUFFIX.len()];
347 if name != expected_name {
350 if let Some(ref prev) = file {
351 let err = format!("duplicate codegen backends found\n\
354 ", prev.display(), path.display());
355 early_error(ErrorOutputType::default(), &err);
357 file = Some(path.clone());
361 Some(ref s) => return load_backend_from_dylib(s),
363 let err = format!("failed to load default codegen backend for `{}`, \
364 no appropriate codegen dylib found in `{}`",
365 backend_name, sysroot.display());
366 early_error(ErrorOutputType::default(), &err);
371 fn current_dll_path() -> Option<PathBuf> {
372 use std::ffi::{OsStr, CStr};
373 use std::os::unix::prelude::*;
376 let addr = current_dll_path as usize as *mut _;
377 let mut info = mem::zeroed();
378 if libc::dladdr(addr, &mut info) == 0 {
379 info!("dladdr failed");
382 if info.dli_fname.is_null() {
383 info!("dladdr returned null pointer");
386 let bytes = CStr::from_ptr(info.dli_fname).to_bytes();
387 let os = OsStr::from_bytes(bytes);
388 Some(PathBuf::from(os))
393 fn current_dll_path() -> Option<PathBuf> {
394 use std::ffi::OsString;
395 use std::os::windows::prelude::*;
398 fn GetModuleHandleExW(dwFlags: u32,
400 phModule: *mut usize) -> i32;
401 fn GetModuleFileNameW(hModule: usize,
402 lpFilename: *mut u16,
406 const GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS: u32 = 0x00000004;
410 let r = GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
411 current_dll_path as usize,
414 info!("GetModuleHandleExW failed: {}", io::Error::last_os_error());
417 let mut space = Vec::with_capacity(1024);
418 let r = GetModuleFileNameW(module,
420 space.capacity() as u32);
422 info!("GetModuleFileNameW failed: {}", io::Error::last_os_error());
426 if r >= space.capacity() {
427 info!("our buffer was too small? {}",
428 io::Error::last_os_error());
432 let os = OsString::from_wide(&space);
433 Some(PathBuf::from(os))
438 // Parse args and run the compiler. This is the primary entry point for rustc.
439 // See comments on CompilerCalls below for details about the callbacks argument.
440 // The FileLoader provides a way to load files from sources other than the file system.
441 pub fn run_compiler<'a>(args: &[String],
442 callbacks: Box<dyn CompilerCalls<'a> + sync::Send + 'a>,
443 file_loader: Option<Box<dyn FileLoader + Send + Sync + 'static>>,
444 emitter_dest: Option<Box<dyn Write + Send>>)
445 -> (CompileResult, Option<Session>)
447 let matches = match handle_options(args) {
448 Some(matches) => matches,
449 None => return (Ok(()), None),
452 let (sopts, cfg) = config::build_session_options_and_crate_config(&matches);
454 driver::spawn_thread_pool(sopts, |sopts| {
455 run_compiler_with_pool(matches, sopts, cfg, callbacks, file_loader, emitter_dest)
459 fn run_compiler_with_pool<'a>(
460 matches: getopts::Matches,
461 sopts: config::Options,
462 cfg: ast::CrateConfig,
463 mut callbacks: Box<dyn CompilerCalls<'a> + sync::Send + 'a>,
464 file_loader: Option<Box<dyn FileLoader + Send + Sync + 'static>>,
465 emitter_dest: Option<Box<dyn Write + Send>>
466 ) -> (CompileResult, Option<Session>) {
467 macro_rules! do_or_return {($expr: expr, $sess: expr) => {
469 Compilation::Stop => return (Ok(()), $sess),
470 Compilation::Continue => {}
474 let descriptions = diagnostics_registry();
476 do_or_return!(callbacks.early_callback(&matches,
483 let (odir, ofile) = make_output(&matches);
484 let (input, input_file_path, input_err) = match make_input(&matches.free) {
485 Some((input, input_file_path, input_err)) => {
486 let (input, input_file_path) = callbacks.some_input(input, input_file_path);
487 (input, input_file_path, input_err)
489 None => match callbacks.no_input(&matches, &sopts, &cfg, &odir, &ofile, &descriptions) {
490 Some((input, input_file_path)) => (input, input_file_path, None),
491 None => return (Ok(()), None),
495 let loader = file_loader.unwrap_or(box RealFileLoader);
496 let source_map = Lrc::new(SourceMap::with_file_loader(loader, sopts.file_path_mapping()));
497 let mut sess = session::build_session_with_source_map(
498 sopts, input_file_path.clone(), descriptions, source_map, emitter_dest,
501 if let Some(err) = input_err {
502 // Immediately stop compilation if there was an issue reading
503 // the input (for example if the input stream is not UTF-8).
504 sess.err(&err.to_string());
505 return (Err(CompileIncomplete::Stopped), Some(sess));
508 let codegen_backend = get_codegen_backend(&sess);
510 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
512 let mut cfg = config::build_configuration(&sess, cfg);
513 target_features::add_configuration(&mut cfg, &sess, &*codegen_backend);
514 sess.parse_sess.config = cfg;
517 let plugins = sess.opts.debugging_opts.extra_plugins.clone();
519 let cstore = CStore::new(codegen_backend.metadata_loader());
521 do_or_return!(callbacks.late_callback(&*codegen_backend,
527 &ofile), Some(sess));
529 let _sess_abort_error = OnDrop(|| sess.diagnostic().print_error_count());
531 let control = callbacks.build_controller(&sess, &matches);
533 driver::compile_input(codegen_backend,
548 pub fn set_sigpipe_handler() {
550 // Set the SIGPIPE signal handler, so that an EPIPE
551 // will cause rustc to terminate, as expected.
552 assert_ne!(libc::signal(libc::SIGPIPE, libc::SIG_DFL), libc::SIG_ERR);
557 pub fn set_sigpipe_handler() {}
559 // Extract output directory and file from matches.
560 fn make_output(matches: &getopts::Matches) -> (Option<PathBuf>, Option<PathBuf>) {
561 let odir = matches.opt_str("out-dir").map(|o| PathBuf::from(&o));
562 let ofile = matches.opt_str("o").map(|o| PathBuf::from(&o));
566 // Extract input (string or file and optional path) from matches.
567 fn make_input(free_matches: &[String]) -> Option<(Input, Option<PathBuf>, Option<io::Error>)> {
568 if free_matches.len() == 1 {
569 let ifile = &free_matches[0];
571 let mut src = String::new();
572 let err = if io::stdin().read_to_string(&mut src).is_err() {
573 Some(io::Error::new(io::ErrorKind::InvalidData,
574 "couldn't read from stdin, as it did not contain valid UTF-8"))
578 Some((Input::Str { name: FileName::anon_source_code(&src), input: src },
581 Some((Input::File(PathBuf::from(ifile)),
582 Some(PathBuf::from(ifile)), None))
589 fn parse_pretty(sess: &Session,
590 matches: &getopts::Matches)
591 -> Option<(PpMode, Option<UserIdentifiedItem>)> {
592 let pretty = if sess.opts.debugging_opts.unstable_options {
593 matches.opt_default("pretty", "normal").map(|a| {
594 // stable pretty-print variants only
595 pretty::parse_pretty(sess, &a, false)
601 if pretty.is_none() {
602 sess.opts.debugging_opts.unpretty.as_ref().map(|a| {
603 // extended with unstable pretty-print variants
604 pretty::parse_pretty(sess, &a, true)
611 // Whether to stop or continue compilation.
612 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
613 pub enum Compilation {
619 pub fn and_then<F: FnOnce() -> Compilation>(self, next: F) -> Compilation {
621 Compilation::Stop => Compilation::Stop,
622 Compilation::Continue => next(),
627 /// A trait for customizing the compilation process. Offers a number of hooks for
628 /// executing custom code or customizing input.
629 pub trait CompilerCalls<'a> {
630 /// Hook for a callback early in the process of handling arguments. This will
631 /// be called straight after options have been parsed but before anything
632 /// else (e.g., selecting input and output).
633 fn early_callback(&mut self,
634 _: &getopts::Matches,
636 _: &ast::CrateConfig,
637 _: &errors::registry::Registry,
640 Compilation::Continue
643 /// Hook for a callback late in the process of handling arguments. This will
644 /// be called just before actual compilation starts (and before build_controller
645 /// is called), after all arguments etc. have been completely handled.
646 fn late_callback(&mut self,
647 _: &dyn CodegenBackend,
648 _: &getopts::Matches,
655 Compilation::Continue
658 /// Called after we extract the input from the arguments. Gives the implementer
659 /// an opportunity to change the inputs or to add some custom input handling.
660 /// The default behaviour is to simply pass through the inputs.
661 fn some_input(&mut self,
663 input_path: Option<PathBuf>)
664 -> (Input, Option<PathBuf>) {
668 /// Called after we extract the input from the arguments if there is no valid
669 /// input. Gives the implementer an opportunity to supply alternate input (by
670 /// returning a Some value) or to add custom behaviour for this error such as
671 /// emitting error messages. Returning None will cause compilation to stop
673 fn no_input(&mut self,
674 _: &getopts::Matches,
676 _: &ast::CrateConfig,
679 _: &errors::registry::Registry)
680 -> Option<(Input, Option<PathBuf>)> {
684 // Create a CompilController struct for controlling the behaviour of
690 ) -> CompileController<'a>;
693 /// CompilerCalls instance for a regular rustc build.
694 #[derive(Copy, Clone)]
695 pub struct RustcDefaultCalls;
697 // FIXME remove these and use winapi 0.3 instead
698 // Duplicates: bootstrap/compile.rs, librustc_errors/emitter.rs
700 fn stdout_isatty() -> bool {
701 unsafe { libc::isatty(libc::STDOUT_FILENO) != 0 }
705 fn stdout_isatty() -> bool {
708 type HANDLE = *mut u8;
709 type LPDWORD = *mut u32;
710 const STD_OUTPUT_HANDLE: DWORD = -11i32 as DWORD;
712 fn GetStdHandle(which: DWORD) -> HANDLE;
713 fn GetConsoleMode(hConsoleHandle: HANDLE, lpMode: LPDWORD) -> BOOL;
716 let handle = GetStdHandle(STD_OUTPUT_HANDLE);
718 GetConsoleMode(handle, &mut out) != 0
722 fn handle_explain(code: &str,
723 descriptions: &errors::registry::Registry,
724 output: ErrorOutputType) {
725 let normalised = if code.starts_with("E") {
728 format!("E{0:0>4}", code)
730 match descriptions.find_description(&normalised) {
731 Some(ref description) => {
732 let mut is_in_code_block = false;
733 let mut text = String::new();
735 // Slice off the leading newline and print.
736 for line in description[1..].lines() {
737 let indent_level = line.find(|c: char| !c.is_whitespace())
738 .unwrap_or_else(|| line.len());
739 let dedented_line = &line[indent_level..];
740 if dedented_line.starts_with("```") {
741 is_in_code_block = !is_in_code_block;
742 text.push_str(&line[..(indent_level+3)]);
743 } else if is_in_code_block && dedented_line.starts_with("# ") {
752 show_content_with_pager(&text);
758 early_error(output, &format!("no extended information for {}", code));
763 fn show_content_with_pager(content: &String) {
764 let pager_name = env::var_os("PAGER").unwrap_or_else(|| if cfg!(windows) {
765 OsString::from("more.com")
767 OsString::from("less")
770 let mut fallback_to_println = false;
772 match Command::new(pager_name).stdin(Stdio::piped()).spawn() {
774 if let Some(pipe) = pager.stdin.as_mut() {
775 if pipe.write_all(content.as_bytes()).is_err() {
776 fallback_to_println = true;
780 if pager.wait().is_err() {
781 fallback_to_println = true;
785 fallback_to_println = true;
789 // If pager fails for whatever reason, we should still print the content
790 // to standard output
791 if fallback_to_println {
792 print!("{}", content);
796 impl<'a> CompilerCalls<'a> for RustcDefaultCalls {
797 fn early_callback(&mut self,
798 matches: &getopts::Matches,
800 _: &ast::CrateConfig,
801 descriptions: &errors::registry::Registry,
802 output: ErrorOutputType)
804 if let Some(ref code) = matches.opt_str("explain") {
805 handle_explain(code, descriptions, output);
806 return Compilation::Stop;
809 Compilation::Continue
812 fn no_input(&mut self,
813 matches: &getopts::Matches,
814 sopts: &config::Options,
815 cfg: &ast::CrateConfig,
816 odir: &Option<PathBuf>,
817 ofile: &Option<PathBuf>,
818 descriptions: &errors::registry::Registry)
819 -> Option<(Input, Option<PathBuf>)> {
820 match matches.free.len() {
822 let mut sess = build_session(sopts.clone(),
824 descriptions.clone());
825 if sopts.describe_lints {
826 let mut ls = lint::LintStore::new();
827 rustc_lint::register_builtins(&mut ls, Some(&sess));
828 describe_lints(&sess, &ls, false);
831 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
832 let mut cfg = config::build_configuration(&sess, cfg.clone());
833 let codegen_backend = get_codegen_backend(&sess);
834 target_features::add_configuration(&mut cfg, &sess, &*codegen_backend);
835 sess.parse_sess.config = cfg;
836 let should_stop = RustcDefaultCalls::print_crate_info(
844 if should_stop == Compilation::Stop {
847 early_error(sopts.error_format, "no input filename given");
849 1 => panic!("make_input should have provided valid inputs"),
850 _ => early_error(sopts.error_format, "multiple input filenames provided"),
854 fn late_callback(&mut self,
855 codegen_backend: &dyn CodegenBackend,
856 matches: &getopts::Matches,
860 odir: &Option<PathBuf>,
861 ofile: &Option<PathBuf>)
863 RustcDefaultCalls::print_crate_info(codegen_backend, sess, Some(input), odir, ofile)
864 .and_then(|| RustcDefaultCalls::list_metadata(sess, cstore, matches, input))
867 fn build_controller(self: Box<Self>,
869 matches: &getopts::Matches)
870 -> CompileController<'a> {
871 let mut control = CompileController::basic();
873 control.keep_ast = sess.opts.debugging_opts.keep_ast;
874 control.continue_parse_after_error = sess.opts.debugging_opts.continue_parse_after_error;
876 if let Some((ppm, opt_uii)) = parse_pretty(sess, matches) {
877 if ppm.needs_ast_map(&opt_uii) {
878 control.after_hir_lowering.stop = Compilation::Stop;
880 control.after_parse.callback = box move |state| {
881 state.krate = Some(pretty::fold_crate(state.session,
882 state.krate.take().unwrap(),
885 control.after_hir_lowering.callback = box move |state| {
886 pretty::print_after_hir_lowering(state.session,
887 state.cstore.unwrap(),
888 state.hir_map.unwrap(),
889 state.analysis.unwrap(),
890 state.resolutions.unwrap(),
892 &state.expanded_crate.take().unwrap(),
893 state.crate_name.unwrap(),
895 state.output_filenames.unwrap(),
900 control.after_parse.stop = Compilation::Stop;
902 control.after_parse.callback = box move |state| {
903 let krate = pretty::fold_crate(state.session, state.krate.take().unwrap(), ppm);
904 pretty::print_after_parsing(state.session,
915 if sess.opts.debugging_opts.parse_only ||
916 sess.opts.debugging_opts.show_span.is_some() ||
917 sess.opts.debugging_opts.ast_json_noexpand {
918 control.after_parse.stop = Compilation::Stop;
921 if sess.opts.debugging_opts.no_analysis ||
922 sess.opts.debugging_opts.ast_json {
923 control.after_hir_lowering.stop = Compilation::Stop;
926 if sess.opts.debugging_opts.save_analysis {
927 enable_save_analysis(&mut control);
930 if sess.print_fuel_crate.is_some() {
931 let old_callback = control.compilation_done.callback;
932 control.compilation_done.callback = box move |state| {
934 let sess = state.session;
935 eprintln!("Fuel used by {}: {}",
936 sess.print_fuel_crate.as_ref().unwrap(),
937 sess.print_fuel.get());
944 pub fn enable_save_analysis(control: &mut CompileController) {
945 control.keep_ast = true;
946 control.after_analysis.callback = box |state| {
947 time(state.session, "save analysis", || {
948 save::process_crate(state.tcx.unwrap(),
949 state.expanded_crate.unwrap(),
950 state.analysis.unwrap(),
951 state.crate_name.unwrap(),
954 DumpHandler::new(state.out_dir,
955 state.crate_name.unwrap()))
958 control.after_analysis.run_callback_on_error = true;
959 control.make_glob_map = resolve::MakeGlobMap::Yes;
962 impl RustcDefaultCalls {
963 pub fn list_metadata(sess: &Session,
965 matches: &getopts::Matches,
968 let r = matches.opt_strs("Z");
969 if r.iter().any(|s| *s == "ls") {
971 &Input::File(ref ifile) => {
972 let path = &(*ifile);
973 let mut v = Vec::new();
974 locator::list_file_metadata(&sess.target.target,
976 &*cstore.metadata_loader,
979 println!("{}", String::from_utf8(v).unwrap());
981 &Input::Str { .. } => {
982 early_error(ErrorOutputType::default(), "cannot list metadata for stdin");
985 return Compilation::Stop;
988 Compilation::Continue
992 fn print_crate_info(codegen_backend: &dyn CodegenBackend,
994 input: Option<&Input>,
995 odir: &Option<PathBuf>,
996 ofile: &Option<PathBuf>)
998 use rustc::session::config::PrintRequest::*;
999 // PrintRequest::NativeStaticLibs is special - printed during linking
1000 // (empty iterator returns true)
1001 if sess.opts.prints.iter().all(|&p| p == PrintRequest::NativeStaticLibs) {
1002 return Compilation::Continue;
1005 let attrs = match input {
1008 let result = parse_crate_attrs(sess, input);
1010 Ok(attrs) => Some(attrs),
1011 Err(mut parse_error) => {
1013 return Compilation::Stop;
1018 for req in &sess.opts.prints {
1021 let mut targets = rustc_target::spec::get_targets().collect::<Vec<String>>();
1023 println!("{}", targets.join("\n"));
1025 Sysroot => println!("{}", sess.sysroot.display()),
1026 TargetSpec => println!("{}", sess.target.target.to_json().pretty()),
1027 FileNames | CrateName => {
1028 let input = input.unwrap_or_else(||
1029 early_error(ErrorOutputType::default(), "no input file provided"));
1030 let attrs = attrs.as_ref().unwrap();
1031 let t_outputs = driver::build_output_filenames(input, odir, ofile, attrs, sess);
1032 let id = rustc_codegen_utils::link::find_crate_name(Some(sess), attrs, input);
1033 if *req == PrintRequest::CrateName {
1037 let crate_types = driver::collect_crate_types(sess, attrs);
1038 for &style in &crate_types {
1039 let fname = rustc_codegen_utils::link::filename_for_input(
1045 println!("{}", fname.file_name().unwrap().to_string_lossy());
1049 let allow_unstable_cfg = UnstableFeatures::from_environment()
1050 .is_nightly_build();
1052 let mut cfgs = sess.parse_sess.config.iter().filter_map(|&(name, ref value)| {
1053 let gated_cfg = GatedCfg::gate(&ast::MetaItem {
1054 ident: ast::Path::from_ident(ast::Ident::with_empty_ctxt(name)),
1055 node: ast::MetaItemKind::Word,
1059 // Note that crt-static is a specially recognized cfg
1060 // directive that's printed out here as part of
1061 // rust-lang/rust#37406, but in general the
1062 // `target_feature` cfg is gated under
1063 // rust-lang/rust#29717. For now this is just
1064 // specifically allowing the crt-static cfg and that's
1065 // it, this is intended to get into Cargo and then go
1066 // through to build scripts.
1067 let value = value.as_ref().map(|s| s.as_str());
1068 let value = value.as_ref().map(|s| s.as_ref());
1069 if name != "target_feature" || value != Some("crt-static") {
1070 if !allow_unstable_cfg && gated_cfg.is_some() {
1075 if let Some(value) = value {
1076 Some(format!("{}=\"{}\"", name, value))
1078 Some(name.to_string())
1080 }).collect::<Vec<String>>();
1084 println!("{}", cfg);
1087 RelocationModels | CodeModels | TlsModels | TargetCPUs | TargetFeatures => {
1088 codegen_backend.print(*req, sess);
1090 // Any output here interferes with Cargo's parsing of other printed output
1091 PrintRequest::NativeStaticLibs => {}
1094 return Compilation::Stop;
1098 /// Returns a version string such as "0.12.0-dev".
1099 fn release_str() -> Option<&'static str> {
1100 option_env!("CFG_RELEASE")
1103 /// Returns the full SHA1 hash of HEAD of the Git repo from which rustc was built.
1104 fn commit_hash_str() -> Option<&'static str> {
1105 option_env!("CFG_VER_HASH")
1108 /// Returns the "commit date" of HEAD of the Git repo from which rustc was built as a static string.
1109 fn commit_date_str() -> Option<&'static str> {
1110 option_env!("CFG_VER_DATE")
1113 /// Prints version information
1114 pub fn version(binary: &str, matches: &getopts::Matches) {
1115 let verbose = matches.opt_present("verbose");
1117 println!("{} {}", binary, option_env!("CFG_VERSION").unwrap_or("unknown version"));
1120 fn unw(x: Option<&str>) -> &str {
1121 x.unwrap_or("unknown")
1123 println!("binary: {}", binary);
1124 println!("commit-hash: {}", unw(commit_hash_str()));
1125 println!("commit-date: {}", unw(commit_date_str()));
1126 println!("host: {}", config::host_triple());
1127 println!("release: {}", unw(release_str()));
1128 get_codegen_sysroot("llvm")().print_version();
1132 fn usage(verbose: bool, include_unstable_options: bool) {
1133 let groups = if verbose {
1134 config::rustc_optgroups()
1136 config::rustc_short_optgroups()
1138 let mut options = getopts::Options::new();
1139 for option in groups.iter().filter(|x| include_unstable_options || x.is_stable()) {
1140 (option.apply)(&mut options);
1142 let message = "Usage: rustc [OPTIONS] INPUT";
1143 let nightly_help = if nightly_options::is_nightly_build() {
1144 "\n -Z help Print internal options for debugging rustc"
1148 let verbose_help = if verbose {
1151 "\n --help -v Print the full set of options rustc accepts"
1153 println!("{}\nAdditional help:
1154 -C help Print codegen options
1156 Print 'lint' options and default settings{}{}\n",
1157 options.usage(message),
1162 fn print_wall_help() {
1164 The flag `-Wall` does not exist in `rustc`. Most useful lints are enabled by
1165 default. Use `rustc -W help` to see all available lints. It's more common to put
1166 warning settings in the crate root using `#![warn(LINT_NAME)]` instead of using
1167 the command line flag directly.
1171 fn describe_lints(sess: &Session, lint_store: &lint::LintStore, loaded_plugins: bool) {
1173 Available lint options:
1174 -W <foo> Warn about <foo>
1178 -F <foo> Forbid <foo> \
1179 (deny <foo> and all attempts to override)
1183 fn sort_lints(sess: &Session, lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
1184 let mut lints: Vec<_> = lints.into_iter().map(|(x, _)| x).collect();
1185 // The sort doesn't case-fold but it's doubtful we care.
1186 lints.sort_by_cached_key(|x: &&Lint| (x.default_level(sess), x.name));
1190 fn sort_lint_groups(lints: Vec<(&'static str, Vec<lint::LintId>, bool)>)
1191 -> Vec<(&'static str, Vec<lint::LintId>)> {
1192 let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
1193 lints.sort_by_key(|l| l.0);
1197 let (plugin, builtin): (Vec<_>, _) = lint_store.get_lints()
1200 .partition(|&(_, p)| p);
1201 let plugin = sort_lints(sess, plugin);
1202 let builtin = sort_lints(sess, builtin);
1204 let (plugin_groups, builtin_groups): (Vec<_>, _) = lint_store.get_lint_groups()
1207 .partition(|&(.., p)| p);
1208 let plugin_groups = sort_lint_groups(plugin_groups);
1209 let builtin_groups = sort_lint_groups(builtin_groups);
1211 let max_name_len = plugin.iter()
1213 .map(|&s| s.name.chars().count())
1216 let padded = |x: &str| {
1217 let mut s = " ".repeat(max_name_len - x.chars().count());
1222 println!("Lint checks provided by rustc:\n");
1223 println!(" {} {:7.7} {}", padded("name"), "default", "meaning");
1224 println!(" {} {:7.7} {}", padded("----"), "-------", "-------");
1226 let print_lints = |lints: Vec<&Lint>| {
1228 let name = lint.name_lower().replace("_", "-");
1229 println!(" {} {:7.7} {}",
1231 lint.default_level.as_str(),
1237 print_lints(builtin);
1239 let max_name_len = max("warnings".len(),
1240 plugin_groups.iter()
1241 .chain(&builtin_groups)
1242 .map(|&(s, _)| s.chars().count())
1246 let padded = |x: &str| {
1247 let mut s = " ".repeat(max_name_len - x.chars().count());
1252 println!("Lint groups provided by rustc:\n");
1253 println!(" {} {}", padded("name"), "sub-lints");
1254 println!(" {} {}", padded("----"), "---------");
1255 println!(" {} {}", padded("warnings"), "all lints that are set to issue warnings");
1257 let print_lint_groups = |lints: Vec<(&'static str, Vec<lint::LintId>)>| {
1258 for (name, to) in lints {
1259 let name = name.to_lowercase().replace("_", "-");
1260 let desc = to.into_iter()
1261 .map(|x| x.to_string().replace("_", "-"))
1262 .collect::<Vec<String>>()
1264 println!(" {} {}", padded(&name), desc);
1269 print_lint_groups(builtin_groups);
1271 match (loaded_plugins, plugin.len(), plugin_groups.len()) {
1272 (false, 0, _) | (false, _, 0) => {
1273 println!("Compiler plugins can provide additional lints and lint groups. To see a \
1274 listing of these, re-run `rustc -W help` with a crate filename.");
1276 (false, ..) => panic!("didn't load lint plugins but got them anyway!"),
1277 (true, 0, 0) => println!("This crate does not load any lint plugins or lint groups."),
1280 println!("Lint checks provided by plugins loaded by this crate:\n");
1281 print_lints(plugin);
1284 println!("Lint groups provided by plugins loaded by this crate:\n");
1285 print_lint_groups(plugin_groups);
1291 fn describe_debug_flags() {
1292 println!("\nAvailable debug options:\n");
1293 print_flag_list("-Z", config::DB_OPTIONS);
1296 fn describe_codegen_flags() {
1297 println!("\nAvailable codegen options:\n");
1298 print_flag_list("-C", config::CG_OPTIONS);
1301 fn print_flag_list<T>(cmdline_opt: &str,
1302 flag_list: &[(&'static str, T, Option<&'static str>, &'static str)]) {
1303 let max_len = flag_list.iter()
1304 .map(|&(name, _, opt_type_desc, _)| {
1305 let extra_len = match opt_type_desc {
1309 name.chars().count() + extra_len
1314 for &(name, _, opt_type_desc, desc) in flag_list {
1315 let (width, extra) = match opt_type_desc {
1316 Some(..) => (max_len - 4, "=val"),
1317 None => (max_len, ""),
1319 println!(" {} {:>width$}{} -- {}",
1321 name.replace("_", "-"),
1328 /// Process command line options. Emits messages as appropriate. If compilation
1329 /// should continue, returns a getopts::Matches object parsed from args,
1330 /// otherwise returns None.
1332 /// The compiler's handling of options is a little complicated as it ties into
1333 /// our stability story, and it's even *more* complicated by historical
1334 /// accidents. The current intention of each compiler option is to have one of
1337 /// 1. An option is stable and can be used everywhere.
1338 /// 2. An option is unstable, but was historically allowed on the stable
1340 /// 3. An option is unstable, and can only be used on nightly.
1342 /// Like unstable library and language features, however, unstable options have
1343 /// always required a form of "opt in" to indicate that you're using them. This
1344 /// provides the easy ability to scan a code base to check to see if anything
1345 /// unstable is being used. Currently, this "opt in" is the `-Z` "zed" flag.
1347 /// All options behind `-Z` are considered unstable by default. Other top-level
1348 /// options can also be considered unstable, and they were unlocked through the
1349 /// `-Z unstable-options` flag. Note that `-Z` remains to be the root of
1350 /// instability in both cases, though.
1352 /// So with all that in mind, the comments below have some more detail about the
1353 /// contortions done here to get things to work out correctly.
1354 pub fn handle_options(args: &[String]) -> Option<getopts::Matches> {
1355 // Throw away the first argument, the name of the binary
1356 let args = &args[1..];
1358 if args.is_empty() {
1359 // user did not write `-v` nor `-Z unstable-options`, so do not
1360 // include that extra information.
1361 usage(false, false);
1365 // Parse with *all* options defined in the compiler, we don't worry about
1366 // option stability here we just want to parse as much as possible.
1367 let mut options = getopts::Options::new();
1368 for option in config::rustc_optgroups() {
1369 (option.apply)(&mut options);
1371 let matches = options.parse(args).unwrap_or_else(|f|
1372 early_error(ErrorOutputType::default(), &f.to_string()));
1374 // For all options we just parsed, we check a few aspects:
1376 // * If the option is stable, we're all good
1377 // * If the option wasn't passed, we're all good
1378 // * If `-Z unstable-options` wasn't passed (and we're not a -Z option
1379 // ourselves), then we require the `-Z unstable-options` flag to unlock
1380 // this option that was passed.
1381 // * If we're a nightly compiler, then unstable options are now unlocked, so
1382 // we're good to go.
1383 // * Otherwise, if we're a truly unstable option then we generate an error
1384 // (unstable option being used on stable)
1385 // * If we're a historically stable-but-should-be-unstable option then we
1386 // emit a warning that we're going to turn this into an error soon.
1387 nightly_options::check_nightly_options(&matches, &config::rustc_optgroups());
1389 if matches.opt_present("h") || matches.opt_present("help") {
1390 // Only show unstable options in --help if we *really* accept unstable
1391 // options, which catches the case where we got `-Z unstable-options` on
1392 // the stable channel of Rust which was accidentally allowed
1394 usage(matches.opt_present("verbose"),
1395 nightly_options::is_unstable_enabled(&matches));
1399 // Handle the special case of -Wall.
1400 let wall = matches.opt_strs("W");
1401 if wall.iter().any(|x| *x == "all") {
1406 // Don't handle -W help here, because we might first load plugins.
1407 let r = matches.opt_strs("Z");
1408 if r.iter().any(|x| *x == "help") {
1409 describe_debug_flags();
1413 let cg_flags = matches.opt_strs("C");
1415 if cg_flags.iter().any(|x| *x == "help") {
1416 describe_codegen_flags();
1420 if cg_flags.iter().any(|x| *x == "no-stack-check") {
1421 early_warn(ErrorOutputType::default(),
1422 "the --no-stack-check flag is deprecated and does nothing");
1425 if cg_flags.iter().any(|x| *x == "passes=list") {
1426 get_codegen_sysroot("llvm")().print_passes();
1430 if matches.opt_present("version") {
1431 version("rustc", &matches);
1438 fn parse_crate_attrs<'a>(sess: &'a Session, input: &Input) -> PResult<'a, Vec<ast::Attribute>> {
1440 Input::File(ref ifile) => {
1441 parse::parse_crate_attrs_from_file(ifile, &sess.parse_sess)
1443 Input::Str { ref name, ref input } => {
1444 parse::parse_crate_attrs_from_source_str(name.clone(),
1451 // Temporarily have stack size set to 32MB to deal with various crates with long method
1452 // chains or deep syntax trees.
1453 // FIXME(oli-obk): get https://github.com/rust-lang/rust/pull/55617 the finish line
1454 const STACK_SIZE: usize = 32 * 1024 * 1024; // 32MB
1456 /// Runs `f` in a suitable thread for running `rustc`; returns a `Result` with either the return
1457 /// value of `f` or -- if a panic occurs -- the panic value.
1459 /// This version applies the given name to the thread. This is used by rustdoc to ensure consistent
1460 /// doctest output across platforms and executions.
1461 pub fn in_named_rustc_thread<F, R>(name: String, f: F) -> Result<R, Box<dyn Any + Send>>
1462 where F: FnOnce() -> R + Send + 'static,
1465 // We need a thread for soundness of thread local storage in rustc. For debugging purposes
1466 // we allow an escape hatch where everything runs on the main thread.
1467 if env::var_os("RUSTC_UNSTABLE_NO_MAIN_THREAD").is_none() {
1468 let mut cfg = thread::Builder::new().name(name);
1470 // If the env is trying to override the stack size then *don't* set it explicitly.
1471 // The libstd thread impl will fetch the `RUST_MIN_STACK` env var itself.
1472 if env::var_os("RUST_MIN_STACK").is_none() {
1473 cfg = cfg.stack_size(STACK_SIZE);
1476 let thread = cfg.spawn(f);
1477 thread.unwrap().join()
1479 let f = panic::AssertUnwindSafe(f);
1480 panic::catch_unwind(f)
1484 /// Runs `f` in a suitable thread for running `rustc`; returns a
1485 /// `Result` with either the return value of `f` or -- if a panic
1486 /// occurs -- the panic value.
1487 pub fn in_rustc_thread<F, R>(f: F) -> Result<R, Box<dyn Any + Send>>
1488 where F: FnOnce() -> R + Send + 'static,
1491 in_named_rustc_thread("rustc".to_string(), f)
1494 /// Get a list of extra command-line flags provided by the user, as strings.
1496 /// This function is used during ICEs to show more information useful for
1497 /// debugging, since some ICEs only happens with non-default compiler flags
1498 /// (and the users don't always report them).
1499 fn extra_compiler_flags() -> Option<(Vec<String>, bool)> {
1500 let args = env::args_os().map(|arg| arg.to_string_lossy().to_string()).collect::<Vec<_>>();
1502 // Avoid printing help because of empty args. This can suggest the compiler
1503 // itself is not the program root (consider RLS).
1508 let matches = if let Some(matches) = handle_options(&args) {
1514 let mut result = Vec::new();
1515 let mut excluded_cargo_defaults = false;
1516 for flag in ICE_REPORT_COMPILER_FLAGS {
1517 let prefix = if flag.len() == 1 { "-" } else { "--" };
1519 for content in &matches.opt_strs(flag) {
1520 // Split always returns the first element
1521 let name = if let Some(first) = content.split('=').next() {
1527 let content = if ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE.contains(&name) {
1533 if !ICE_REPORT_COMPILER_FLAGS_EXCLUDE.contains(&name) {
1534 result.push(format!("{}{} {}", prefix, flag, content));
1536 excluded_cargo_defaults = true;
1541 if !result.is_empty() {
1542 Some((result, excluded_cargo_defaults))
1549 pub struct CompilationFailure;
1551 impl Error for CompilationFailure {}
1553 impl Display for CompilationFailure {
1554 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
1555 write!(f, "compilation had errors")
1559 /// Run a procedure which will detect panics in the compiler and print nicer
1560 /// error messages rather than just failing the test.
1562 /// The diagnostic emitter yielded to the procedure should be used for reporting
1563 /// errors of the compiler.
1564 pub fn monitor<F: FnOnce() + Send + 'static>(f: F) -> Result<(), CompilationFailure> {
1565 in_rustc_thread(move || {
1567 }).map_err(|value| {
1568 if value.is::<errors::FatalErrorMarker>() {
1571 // Thread panicked without emitting a fatal diagnostic
1575 Box::new(errors::emitter::EmitterWriter::stderr(errors::ColorConfig::Auto,
1579 let handler = errors::Handler::with_emitter(true, false, emitter);
1581 // a .span_bug or .bug call has already printed what
1582 // it wants to print.
1583 if !value.is::<errors::ExplicitBug>() {
1584 handler.emit(&MultiSpan::new(),
1586 errors::Level::Bug);
1589 let mut xs: Vec<Cow<'static, str>> = vec![
1590 "the compiler unexpectedly panicked. this is a bug.".into(),
1591 format!("we would appreciate a bug report: {}", BUG_REPORT_URL).into(),
1592 format!("rustc {} running on {}",
1593 option_env!("CFG_VERSION").unwrap_or("unknown_version"),
1594 config::host_triple()).into(),
1597 if let Some((flags, excluded_cargo_defaults)) = extra_compiler_flags() {
1598 xs.push(format!("compiler flags: {}", flags.join(" ")).into());
1600 if excluded_cargo_defaults {
1601 xs.push("some of the compiler flags provided by cargo are hidden".into());
1606 handler.emit(&MultiSpan::new(),
1608 errors::Level::Note);
1611 panic::resume_unwind(Box::new(errors::FatalErrorMarker));
1616 pub fn diagnostics_registry() -> errors::registry::Registry {
1617 use errors::registry::Registry;
1619 let mut all_errors = Vec::new();
1620 all_errors.extend_from_slice(&rustc::DIAGNOSTICS);
1621 all_errors.extend_from_slice(&rustc_typeck::DIAGNOSTICS);
1622 all_errors.extend_from_slice(&rustc_resolve::DIAGNOSTICS);
1623 all_errors.extend_from_slice(&rustc_privacy::DIAGNOSTICS);
1624 // FIXME: need to figure out a way to get these back in here
1625 // all_errors.extend_from_slice(get_codegen_backend(sess).diagnostics());
1626 all_errors.extend_from_slice(&rustc_metadata::DIAGNOSTICS);
1627 all_errors.extend_from_slice(&rustc_passes::DIAGNOSTICS);
1628 all_errors.extend_from_slice(&rustc_plugin::DIAGNOSTICS);
1629 all_errors.extend_from_slice(&rustc_mir::DIAGNOSTICS);
1630 all_errors.extend_from_slice(&syntax::DIAGNOSTICS);
1632 Registry::new(&all_errors)
1635 /// This allows tools to enable rust logging without having to magically match rustc's
1636 /// log crate version
1637 pub fn init_rustc_env_logger() {
1642 init_rustc_env_logger();
1643 let result = run(|| {
1644 let args = env::args_os().enumerate()
1645 .map(|(i, arg)| arg.into_string().unwrap_or_else(|arg| {
1646 early_error(ErrorOutputType::default(),
1647 &format!("Argument {} is not valid Unicode: {:?}", i, arg))
1649 .collect::<Vec<_>>();
1651 Box::new(RustcDefaultCalls),
1655 process::exit(result as i32);