1 // Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! The Rust compiler.
15 //! This API is completely unstable and subject to change.
17 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
18 html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
19 html_root_url = "https://doc.rust-lang.org/nightly/")]
21 #![feature(box_syntax)]
22 #![cfg_attr(unix, feature(libc))]
25 #![feature(rustc_diagnostic_macros)]
26 #![feature(slice_sort_by_cached_key)]
27 #![feature(set_stdio)]
30 #![recursion_limit="256"]
33 pub extern crate getopts;
34 extern crate graphviz;
35 extern crate env_logger;
38 extern crate rustc_rayon as rayon;
40 extern crate rustc_allocator;
41 extern crate rustc_target;
42 extern crate rustc_borrowck;
43 extern crate rustc_data_structures;
44 extern crate rustc_errors as errors;
45 extern crate rustc_passes;
46 extern crate rustc_lint;
47 extern crate rustc_plugin;
48 extern crate rustc_privacy;
49 extern crate rustc_incremental;
50 extern crate rustc_metadata;
51 extern crate rustc_mir;
52 extern crate rustc_resolve;
53 extern crate rustc_save_analysis;
54 extern crate rustc_traits;
55 extern crate rustc_codegen_utils;
56 extern crate rustc_typeck;
57 extern crate scoped_tls;
58 extern crate serialize;
59 extern crate smallvec;
63 extern crate syntax_ext;
64 extern crate syntax_pos;
66 use driver::CompileController;
67 use pretty::{PpMode, UserIdentifiedItem};
69 use rustc_resolve as resolve;
70 use rustc_save_analysis as save;
71 use rustc_save_analysis::DumpHandler;
72 use rustc_data_structures::sync::{self, Lrc};
73 use rustc_data_structures::OnDrop;
74 use rustc::session::{self, config, Session, build_session, CompileResult};
75 use rustc::session::CompileIncomplete;
76 use rustc::session::config::{Input, PrintRequest, ErrorOutputType};
77 use rustc::session::config::nightly_options;
78 use rustc::session::filesearch;
79 use rustc::session::{early_error, early_warn};
80 use rustc::lint::Lint;
82 use rustc_metadata::locator;
83 use rustc_metadata::cstore::CStore;
84 use rustc_metadata::dynamic_lib::DynamicLibrary;
85 use rustc::util::common::{time, ErrorReported};
86 use rustc_codegen_utils::codegen_backend::CodegenBackend;
88 use serialize::json::ToJson;
93 use std::default::Default;
94 use std::env::consts::{DLL_PREFIX, DLL_SUFFIX};
96 use std::error::Error;
97 use std::ffi::OsString;
98 use std::fmt::{self, Display};
99 use std::io::{self, Read, Write};
102 use std::path::{PathBuf, Path};
103 use std::process::{self, Command, Stdio};
105 use std::sync::atomic::{AtomicBool, ATOMIC_BOOL_INIT, Ordering};
106 use std::sync::{Once, ONCE_INIT};
110 use syntax::source_map::{SourceMap, FileLoader, RealFileLoader};
111 use syntax::feature_gate::{GatedCfg, UnstableFeatures};
112 use syntax::parse::{self, PResult};
113 use syntax_pos::{DUMMY_SP, MultiSpan, FileName};
121 mod proc_macro_decls;
123 pub mod target_features {
125 use syntax::symbol::Symbol;
126 use rustc::session::Session;
127 use rustc_codegen_utils::codegen_backend::CodegenBackend;
129 /// Add `target_feature = "..."` cfgs for a variety of platform
130 /// specific features (SSE, NEON etc.).
132 /// This is performed by checking whether a whitelisted set of
133 /// features is available on the target machine, by querying LLVM.
134 pub fn add_configuration(cfg: &mut ast::CrateConfig,
136 codegen_backend: &dyn CodegenBackend) {
137 let tf = Symbol::intern("target_feature");
139 cfg.extend(codegen_backend.target_features(sess).into_iter().map(|feat| (tf, Some(feat))));
141 if sess.crt_static_feature() {
142 cfg.insert((tf, Some(Symbol::intern("crt-static"))));
147 /// Exit status code used for successful compilation and help output.
148 pub const EXIT_SUCCESS: isize = 0;
150 /// Exit status code used for compilation failures and invalid flags.
151 pub const EXIT_FAILURE: isize = 1;
153 const BUG_REPORT_URL: &str = "https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.\
156 const ICE_REPORT_COMPILER_FLAGS: &[&str] = &["Z", "C", "crate-type"];
158 const ICE_REPORT_COMPILER_FLAGS_EXCLUDE: &[&str] = &["metadata", "extra-filename"];
160 const ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE: &[&str] = &["incremental"];
162 pub fn abort_on_err<T>(result: Result<T, CompileIncomplete>, sess: &Session) -> T {
164 Err(CompileIncomplete::Errored(ErrorReported)) => {
165 sess.abort_if_errors();
166 panic!("error reported but abort_if_errors didn't abort???");
168 Err(CompileIncomplete::Stopped) => {
169 sess.fatal("compilation terminated");
175 pub fn run<F>(run_compiler: F) -> isize
176 where F: FnOnce() -> (CompileResult, Option<Session>) + Send + 'static
178 let result = monitor(move || {
179 syntax::with_globals(|| {
180 let (result, session) = run_compiler();
181 if let Err(CompileIncomplete::Errored(_)) = result {
184 sess.abort_if_errors();
185 panic!("error reported but abort_if_errors didn't abort???");
189 errors::emitter::EmitterWriter::stderr(
190 errors::ColorConfig::Auto,
195 let handler = errors::Handler::with_emitter(true, false, Box::new(emitter));
196 handler.emit(&MultiSpan::new(),
197 "aborting due to previous error(s)",
198 errors::Level::Fatal);
199 panic::resume_unwind(Box::new(errors::FatalErrorMarker));
207 Ok(()) => EXIT_SUCCESS,
208 Err(_) => EXIT_FAILURE,
212 fn load_backend_from_dylib(path: &Path) -> fn() -> Box<dyn CodegenBackend> {
213 let lib = DynamicLibrary::open(Some(path)).unwrap_or_else(|err| {
214 let err = format!("couldn't load codegen backend {:?}: {:?}", path, err);
215 early_error(ErrorOutputType::default(), &err);
218 match lib.symbol("__rustc_codegen_backend") {
221 mem::transmute::<*mut u8, _>(f)
224 let err = format!("couldn't load codegen backend as it \
225 doesn't export the `__rustc_codegen_backend` \
227 early_error(ErrorOutputType::default(), &err);
233 pub fn get_codegen_backend(sess: &Session) -> Box<dyn CodegenBackend> {
234 static INIT: Once = ONCE_INIT;
238 static mut LOAD: fn() -> Box<dyn CodegenBackend> = || unreachable!();
241 let codegen_name = sess.opts.debugging_opts.codegen_backend.as_ref()
242 .unwrap_or(&sess.target.target.options.codegen_backend);
243 let backend = match &codegen_name[..] {
245 rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::boxed
247 filename if filename.contains(".") => {
248 load_backend_from_dylib(filename.as_ref())
250 codegen_name => get_codegen_sysroot(codegen_name),
257 let backend = unsafe { LOAD() };
262 fn get_codegen_sysroot(backend_name: &str) -> fn() -> Box<dyn CodegenBackend> {
263 // For now we only allow this function to be called once as it'll dlopen a
264 // few things, which seems to work best if we only do that once. In
265 // general this assertion never trips due to the once guard in `get_codegen_backend`,
266 // but there's a few manual calls to this function in this file we protect
268 static LOADED: AtomicBool = ATOMIC_BOOL_INIT;
269 assert!(!LOADED.fetch_or(true, Ordering::SeqCst),
270 "cannot load the default codegen backend twice");
272 // When we're compiling this library with `--test` it'll run as a binary but
273 // not actually exercise much functionality. As a result most of the logic
274 // here is defunkt (it assumes we're a dynamic library in a sysroot) so
275 // let's just return a dummy creation function which won't be used in
278 return rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::boxed
281 let target = session::config::host_triple();
282 let mut sysroot_candidates = vec![filesearch::get_or_default_sysroot()];
283 let path = current_dll_path()
284 .and_then(|s| s.canonicalize().ok());
285 if let Some(dll) = path {
286 // use `parent` twice to chop off the file name and then also the
287 // directory containing the dll which should be either `lib` or `bin`.
288 if let Some(path) = dll.parent().and_then(|p| p.parent()) {
289 // The original `path` pointed at the `rustc_driver` crate's dll.
290 // Now that dll should only be in one of two locations. The first is
291 // in the compiler's libdir, for example `$sysroot/lib/*.dll`. The
292 // other is the target's libdir, for example
293 // `$sysroot/lib/rustlib/$target/lib/*.dll`.
295 // We don't know which, so let's assume that if our `path` above
296 // ends in `$target` we *could* be in the target libdir, and always
297 // assume that we may be in the main libdir.
298 sysroot_candidates.push(path.to_owned());
300 if path.ends_with(target) {
301 sysroot_candidates.extend(path.parent() // chop off `$target`
302 .and_then(|p| p.parent()) // chop off `rustlib`
303 .and_then(|p| p.parent()) // chop off `lib`
304 .map(|s| s.to_owned()));
309 let sysroot = sysroot_candidates.iter()
311 let libdir = filesearch::relative_target_lib_path(&sysroot, &target);
312 sysroot.join(libdir).with_file_name(
313 option_env!("CFG_CODEGEN_BACKENDS_DIR").unwrap_or("codegen-backends"))
316 info!("codegen backend candidate: {}", f.display());
320 let sysroot = sysroot.unwrap_or_else(|| {
321 let candidates = sysroot_candidates.iter()
322 .map(|p| p.display().to_string())
325 let err = format!("failed to find a `codegen-backends` folder \
326 in the sysroot candidates:\n* {}", candidates);
327 early_error(ErrorOutputType::default(), &err);
329 info!("probing {} for a codegen backend", sysroot.display());
331 let d = sysroot.read_dir().unwrap_or_else(|e| {
332 let err = format!("failed to load default codegen backend, couldn't \
333 read `{}`: {}", sysroot.display(), e);
334 early_error(ErrorOutputType::default(), &err);
337 let mut file: Option<PathBuf> = None;
339 let expected_name = format!("rustc_codegen_llvm-{}", backend_name);
340 for entry in d.filter_map(|e| e.ok()) {
341 let path = entry.path();
342 let filename = match path.file_name().and_then(|s| s.to_str()) {
346 if !(filename.starts_with(DLL_PREFIX) && filename.ends_with(DLL_SUFFIX)) {
349 let name = &filename[DLL_PREFIX.len() .. filename.len() - DLL_SUFFIX.len()];
350 if name != expected_name {
353 if let Some(ref prev) = file {
354 let err = format!("duplicate codegen backends found\n\
357 ", prev.display(), path.display());
358 early_error(ErrorOutputType::default(), &err);
360 file = Some(path.clone());
364 Some(ref s) => return load_backend_from_dylib(s),
366 let err = format!("failed to load default codegen backend for `{}`, \
367 no appropriate codegen dylib found in `{}`",
368 backend_name, sysroot.display());
369 early_error(ErrorOutputType::default(), &err);
374 fn current_dll_path() -> Option<PathBuf> {
375 use std::ffi::{OsStr, CStr};
376 use std::os::unix::prelude::*;
379 let addr = current_dll_path as usize as *mut _;
380 let mut info = mem::zeroed();
381 if libc::dladdr(addr, &mut info) == 0 {
382 info!("dladdr failed");
385 if info.dli_fname.is_null() {
386 info!("dladdr returned null pointer");
389 let bytes = CStr::from_ptr(info.dli_fname).to_bytes();
390 let os = OsStr::from_bytes(bytes);
391 Some(PathBuf::from(os))
396 fn current_dll_path() -> Option<PathBuf> {
397 use std::ffi::OsString;
398 use std::os::windows::prelude::*;
401 fn GetModuleHandleExW(dwFlags: u32,
403 phModule: *mut usize) -> i32;
404 fn GetModuleFileNameW(hModule: usize,
405 lpFilename: *mut u16,
409 const GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS: u32 = 0x00000004;
413 let r = GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
414 current_dll_path as usize,
417 info!("GetModuleHandleExW failed: {}", io::Error::last_os_error());
420 let mut space = Vec::with_capacity(1024);
421 let r = GetModuleFileNameW(module,
423 space.capacity() as u32);
425 info!("GetModuleFileNameW failed: {}", io::Error::last_os_error());
429 if r >= space.capacity() {
430 info!("our buffer was too small? {}",
431 io::Error::last_os_error());
435 let os = OsString::from_wide(&space);
436 Some(PathBuf::from(os))
441 // Parse args and run the compiler. This is the primary entry point for rustc.
442 // See comments on CompilerCalls below for details about the callbacks argument.
443 // The FileLoader provides a way to load files from sources other than the file system.
444 pub fn run_compiler<'a>(args: &[String],
445 callbacks: Box<dyn CompilerCalls<'a> + sync::Send + 'a>,
446 file_loader: Option<Box<dyn FileLoader + Send + Sync + 'static>>,
447 emitter_dest: Option<Box<dyn Write + Send>>)
448 -> (CompileResult, Option<Session>)
450 let matches = match handle_options(args) {
451 Some(matches) => matches,
452 None => return (Ok(()), None),
455 let (sopts, cfg) = config::build_session_options_and_crate_config(&matches);
457 driver::spawn_thread_pool(sopts, |sopts| {
458 run_compiler_with_pool(matches, sopts, cfg, callbacks, file_loader, emitter_dest)
462 fn run_compiler_with_pool<'a>(
463 matches: getopts::Matches,
464 sopts: config::Options,
465 cfg: ast::CrateConfig,
466 mut callbacks: Box<dyn CompilerCalls<'a> + sync::Send + 'a>,
467 file_loader: Option<Box<dyn FileLoader + Send + Sync + 'static>>,
468 emitter_dest: Option<Box<dyn Write + Send>>
469 ) -> (CompileResult, Option<Session>) {
470 macro_rules! do_or_return {($expr: expr, $sess: expr) => {
472 Compilation::Stop => return (Ok(()), $sess),
473 Compilation::Continue => {}
477 let descriptions = diagnostics_registry();
479 do_or_return!(callbacks.early_callback(&matches,
486 let (odir, ofile) = make_output(&matches);
487 let (input, input_file_path, input_err) = match make_input(&matches.free) {
488 Some((input, input_file_path, input_err)) => {
489 let (input, input_file_path) = callbacks.some_input(input, input_file_path);
490 (input, input_file_path, input_err)
492 None => match callbacks.no_input(&matches, &sopts, &cfg, &odir, &ofile, &descriptions) {
493 Some((input, input_file_path)) => (input, input_file_path, None),
494 None => return (Ok(()), None),
498 let loader = file_loader.unwrap_or(box RealFileLoader);
499 let source_map = Lrc::new(SourceMap::with_file_loader(loader, sopts.file_path_mapping()));
500 let mut sess = session::build_session_with_source_map(
501 sopts, input_file_path.clone(), descriptions, source_map, emitter_dest,
504 if let Some(err) = input_err {
505 // Immediately stop compilation if there was an issue reading
506 // the input (for example if the input stream is not UTF-8).
507 sess.err(&err.to_string());
508 return (Err(CompileIncomplete::Stopped), Some(sess));
511 let codegen_backend = get_codegen_backend(&sess);
513 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
515 let mut cfg = config::build_configuration(&sess, cfg);
516 target_features::add_configuration(&mut cfg, &sess, &*codegen_backend);
517 sess.parse_sess.config = cfg;
520 let plugins = sess.opts.debugging_opts.extra_plugins.clone();
522 let cstore = CStore::new(codegen_backend.metadata_loader());
524 do_or_return!(callbacks.late_callback(&*codegen_backend,
530 &ofile), Some(sess));
532 let _sess_abort_error = OnDrop(|| sess.diagnostic().print_error_count());
534 let control = callbacks.build_controller(&sess, &matches);
536 driver::compile_input(codegen_backend,
551 pub fn set_sigpipe_handler() {
553 // Set the SIGPIPE signal handler, so that an EPIPE
554 // will cause rustc to terminate, as expected.
555 assert_ne!(libc::signal(libc::SIGPIPE, libc::SIG_DFL), libc::SIG_ERR);
560 pub fn set_sigpipe_handler() {}
562 // Extract output directory and file from matches.
563 fn make_output(matches: &getopts::Matches) -> (Option<PathBuf>, Option<PathBuf>) {
564 let odir = matches.opt_str("out-dir").map(|o| PathBuf::from(&o));
565 let ofile = matches.opt_str("o").map(|o| PathBuf::from(&o));
569 // Extract input (string or file and optional path) from matches.
570 fn make_input(free_matches: &[String]) -> Option<(Input, Option<PathBuf>, Option<io::Error>)> {
571 if free_matches.len() == 1 {
572 let ifile = &free_matches[0];
574 let mut src = String::new();
575 let err = if io::stdin().read_to_string(&mut src).is_err() {
576 Some(io::Error::new(io::ErrorKind::InvalidData,
577 "couldn't read from stdin, as it did not contain valid UTF-8"))
581 Some((Input::Str { name: FileName::anon_source_code(&src), input: src },
584 Some((Input::File(PathBuf::from(ifile)),
585 Some(PathBuf::from(ifile)), None))
592 fn parse_pretty(sess: &Session,
593 matches: &getopts::Matches)
594 -> Option<(PpMode, Option<UserIdentifiedItem>)> {
595 let pretty = if sess.opts.debugging_opts.unstable_options {
596 matches.opt_default("pretty", "normal").map(|a| {
597 // stable pretty-print variants only
598 pretty::parse_pretty(sess, &a, false)
604 if pretty.is_none() {
605 sess.opts.debugging_opts.unpretty.as_ref().map(|a| {
606 // extended with unstable pretty-print variants
607 pretty::parse_pretty(sess, &a, true)
614 // Whether to stop or continue compilation.
615 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
616 pub enum Compilation {
622 pub fn and_then<F: FnOnce() -> Compilation>(self, next: F) -> Compilation {
624 Compilation::Stop => Compilation::Stop,
625 Compilation::Continue => next(),
630 /// A trait for customizing the compilation process. Offers a number of hooks for
631 /// executing custom code or customizing input.
632 pub trait CompilerCalls<'a> {
633 /// Hook for a callback early in the process of handling arguments. This will
634 /// be called straight after options have been parsed but before anything
635 /// else (e.g., selecting input and output).
636 fn early_callback(&mut self,
637 _: &getopts::Matches,
639 _: &ast::CrateConfig,
640 _: &errors::registry::Registry,
643 Compilation::Continue
646 /// Hook for a callback late in the process of handling arguments. This will
647 /// be called just before actual compilation starts (and before build_controller
648 /// is called), after all arguments etc. have been completely handled.
649 fn late_callback(&mut self,
650 _: &dyn CodegenBackend,
651 _: &getopts::Matches,
658 Compilation::Continue
661 /// Called after we extract the input from the arguments. Gives the implementer
662 /// an opportunity to change the inputs or to add some custom input handling.
663 /// The default behaviour is to simply pass through the inputs.
664 fn some_input(&mut self,
666 input_path: Option<PathBuf>)
667 -> (Input, Option<PathBuf>) {
671 /// Called after we extract the input from the arguments if there is no valid
672 /// input. Gives the implementer an opportunity to supply alternate input (by
673 /// returning a Some value) or to add custom behaviour for this error such as
674 /// emitting error messages. Returning None will cause compilation to stop
676 fn no_input(&mut self,
677 _: &getopts::Matches,
679 _: &ast::CrateConfig,
682 _: &errors::registry::Registry)
683 -> Option<(Input, Option<PathBuf>)> {
687 // Create a CompilController struct for controlling the behaviour of
693 ) -> CompileController<'a>;
696 /// CompilerCalls instance for a regular rustc build.
697 #[derive(Copy, Clone)]
698 pub struct RustcDefaultCalls;
700 // FIXME remove these and use winapi 0.3 instead
701 // Duplicates: bootstrap/compile.rs, librustc_errors/emitter.rs
703 fn stdout_isatty() -> bool {
704 unsafe { libc::isatty(libc::STDOUT_FILENO) != 0 }
708 fn stdout_isatty() -> bool {
711 type HANDLE = *mut u8;
712 type LPDWORD = *mut u32;
713 const STD_OUTPUT_HANDLE: DWORD = -11i32 as DWORD;
715 fn GetStdHandle(which: DWORD) -> HANDLE;
716 fn GetConsoleMode(hConsoleHandle: HANDLE, lpMode: LPDWORD) -> BOOL;
719 let handle = GetStdHandle(STD_OUTPUT_HANDLE);
721 GetConsoleMode(handle, &mut out) != 0
725 fn handle_explain(code: &str,
726 descriptions: &errors::registry::Registry,
727 output: ErrorOutputType) {
728 let normalised = if code.starts_with("E") {
731 format!("E{0:0>4}", code)
733 match descriptions.find_description(&normalised) {
734 Some(ref description) => {
735 let mut is_in_code_block = false;
736 let mut text = String::new();
738 // Slice off the leading newline and print.
739 for line in description[1..].lines() {
740 let indent_level = line.find(|c: char| !c.is_whitespace())
741 .unwrap_or_else(|| line.len());
742 let dedented_line = &line[indent_level..];
743 if dedented_line.starts_with("```") {
744 is_in_code_block = !is_in_code_block;
745 text.push_str(&line[..(indent_level+3)]);
746 } else if is_in_code_block && dedented_line.starts_with("# ") {
755 show_content_with_pager(&text);
761 early_error(output, &format!("no extended information for {}", code));
766 fn show_content_with_pager(content: &String) {
767 let pager_name = env::var_os("PAGER").unwrap_or_else(|| if cfg!(windows) {
768 OsString::from("more.com")
770 OsString::from("less")
773 let mut fallback_to_println = false;
775 match Command::new(pager_name).stdin(Stdio::piped()).spawn() {
777 if let Some(pipe) = pager.stdin.as_mut() {
778 if pipe.write_all(content.as_bytes()).is_err() {
779 fallback_to_println = true;
783 if pager.wait().is_err() {
784 fallback_to_println = true;
788 fallback_to_println = true;
792 // If pager fails for whatever reason, we should still print the content
793 // to standard output
794 if fallback_to_println {
795 print!("{}", content);
799 impl<'a> CompilerCalls<'a> for RustcDefaultCalls {
800 fn early_callback(&mut self,
801 matches: &getopts::Matches,
803 _: &ast::CrateConfig,
804 descriptions: &errors::registry::Registry,
805 output: ErrorOutputType)
807 if let Some(ref code) = matches.opt_str("explain") {
808 handle_explain(code, descriptions, output);
809 return Compilation::Stop;
812 Compilation::Continue
815 fn no_input(&mut self,
816 matches: &getopts::Matches,
817 sopts: &config::Options,
818 cfg: &ast::CrateConfig,
819 odir: &Option<PathBuf>,
820 ofile: &Option<PathBuf>,
821 descriptions: &errors::registry::Registry)
822 -> Option<(Input, Option<PathBuf>)> {
823 match matches.free.len() {
825 let mut sess = build_session(sopts.clone(),
827 descriptions.clone());
828 if sopts.describe_lints {
829 let mut ls = lint::LintStore::new();
830 rustc_lint::register_builtins(&mut ls, Some(&sess));
831 describe_lints(&sess, &ls, false);
834 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
835 let mut cfg = config::build_configuration(&sess, cfg.clone());
836 let codegen_backend = get_codegen_backend(&sess);
837 target_features::add_configuration(&mut cfg, &sess, &*codegen_backend);
838 sess.parse_sess.config = cfg;
839 let should_stop = RustcDefaultCalls::print_crate_info(
847 if should_stop == Compilation::Stop {
850 early_error(sopts.error_format, "no input filename given");
852 1 => panic!("make_input should have provided valid inputs"),
853 _ => early_error(sopts.error_format, "multiple input filenames provided"),
857 fn late_callback(&mut self,
858 codegen_backend: &dyn CodegenBackend,
859 matches: &getopts::Matches,
863 odir: &Option<PathBuf>,
864 ofile: &Option<PathBuf>)
866 RustcDefaultCalls::print_crate_info(codegen_backend, sess, Some(input), odir, ofile)
867 .and_then(|| RustcDefaultCalls::list_metadata(sess, cstore, matches, input))
870 fn build_controller(self: Box<Self>,
872 matches: &getopts::Matches)
873 -> CompileController<'a> {
874 let mut control = CompileController::basic();
876 control.keep_ast = sess.opts.debugging_opts.keep_ast;
877 control.continue_parse_after_error = sess.opts.debugging_opts.continue_parse_after_error;
879 if let Some((ppm, opt_uii)) = parse_pretty(sess, matches) {
880 if ppm.needs_ast_map(&opt_uii) {
881 control.after_hir_lowering.stop = Compilation::Stop;
883 control.after_parse.callback = box move |state| {
884 state.krate = Some(pretty::fold_crate(state.session,
885 state.krate.take().unwrap(),
888 control.after_hir_lowering.callback = box move |state| {
889 pretty::print_after_hir_lowering(state.session,
890 state.cstore.unwrap(),
891 state.hir_map.unwrap(),
892 state.analysis.unwrap(),
893 state.resolutions.unwrap(),
895 &state.expanded_crate.take().unwrap(),
896 state.crate_name.unwrap(),
898 state.output_filenames.unwrap(),
903 control.after_parse.stop = Compilation::Stop;
905 control.after_parse.callback = box move |state| {
906 let krate = pretty::fold_crate(state.session, state.krate.take().unwrap(), ppm);
907 pretty::print_after_parsing(state.session,
918 if sess.opts.debugging_opts.parse_only ||
919 sess.opts.debugging_opts.show_span.is_some() ||
920 sess.opts.debugging_opts.ast_json_noexpand {
921 control.after_parse.stop = Compilation::Stop;
924 if sess.opts.debugging_opts.no_analysis ||
925 sess.opts.debugging_opts.ast_json {
926 control.after_hir_lowering.stop = Compilation::Stop;
929 if sess.opts.debugging_opts.save_analysis {
930 enable_save_analysis(&mut control);
933 if sess.print_fuel_crate.is_some() {
934 let old_callback = control.compilation_done.callback;
935 control.compilation_done.callback = box move |state| {
937 let sess = state.session;
938 eprintln!("Fuel used by {}: {}",
939 sess.print_fuel_crate.as_ref().unwrap(),
940 sess.print_fuel.get());
947 pub fn enable_save_analysis(control: &mut CompileController) {
948 control.keep_ast = true;
949 control.after_analysis.callback = box |state| {
950 time(state.session, "save analysis", || {
951 save::process_crate(state.tcx.unwrap(),
952 state.expanded_crate.unwrap(),
953 state.analysis.unwrap(),
954 state.crate_name.unwrap(),
957 DumpHandler::new(state.out_dir,
958 state.crate_name.unwrap()))
961 control.after_analysis.run_callback_on_error = true;
962 control.make_glob_map = resolve::MakeGlobMap::Yes;
965 impl RustcDefaultCalls {
966 pub fn list_metadata(sess: &Session,
968 matches: &getopts::Matches,
971 let r = matches.opt_strs("Z");
972 if r.iter().any(|s| *s == "ls") {
974 &Input::File(ref ifile) => {
975 let path = &(*ifile);
976 let mut v = Vec::new();
977 locator::list_file_metadata(&sess.target.target,
979 &*cstore.metadata_loader,
982 println!("{}", String::from_utf8(v).unwrap());
984 &Input::Str { .. } => {
985 early_error(ErrorOutputType::default(), "cannot list metadata for stdin");
988 return Compilation::Stop;
991 Compilation::Continue
995 fn print_crate_info(codegen_backend: &dyn CodegenBackend,
997 input: Option<&Input>,
998 odir: &Option<PathBuf>,
999 ofile: &Option<PathBuf>)
1001 use rustc::session::config::PrintRequest::*;
1002 // PrintRequest::NativeStaticLibs is special - printed during linking
1003 // (empty iterator returns true)
1004 if sess.opts.prints.iter().all(|&p| p == PrintRequest::NativeStaticLibs) {
1005 return Compilation::Continue;
1008 let attrs = match input {
1011 let result = parse_crate_attrs(sess, input);
1013 Ok(attrs) => Some(attrs),
1014 Err(mut parse_error) => {
1016 return Compilation::Stop;
1021 for req in &sess.opts.prints {
1024 let mut targets = rustc_target::spec::get_targets().collect::<Vec<String>>();
1026 println!("{}", targets.join("\n"));
1028 Sysroot => println!("{}", sess.sysroot.display()),
1029 TargetSpec => println!("{}", sess.target.target.to_json().pretty()),
1030 FileNames | CrateName => {
1031 let input = input.unwrap_or_else(||
1032 early_error(ErrorOutputType::default(), "no input file provided"));
1033 let attrs = attrs.as_ref().unwrap();
1034 let t_outputs = driver::build_output_filenames(input, odir, ofile, attrs, sess);
1035 let id = rustc_codegen_utils::link::find_crate_name(Some(sess), attrs, input);
1036 if *req == PrintRequest::CrateName {
1040 let crate_types = driver::collect_crate_types(sess, attrs);
1041 for &style in &crate_types {
1042 let fname = rustc_codegen_utils::link::filename_for_input(
1048 println!("{}", fname.file_name().unwrap().to_string_lossy());
1052 let allow_unstable_cfg = UnstableFeatures::from_environment()
1053 .is_nightly_build();
1055 let mut cfgs = sess.parse_sess.config.iter().filter_map(|&(name, ref value)| {
1056 let gated_cfg = GatedCfg::gate(&ast::MetaItem {
1057 ident: ast::Path::from_ident(ast::Ident::with_empty_ctxt(name)),
1058 node: ast::MetaItemKind::Word,
1062 // Note that crt-static is a specially recognized cfg
1063 // directive that's printed out here as part of
1064 // rust-lang/rust#37406, but in general the
1065 // `target_feature` cfg is gated under
1066 // rust-lang/rust#29717. For now this is just
1067 // specifically allowing the crt-static cfg and that's
1068 // it, this is intended to get into Cargo and then go
1069 // through to build scripts.
1070 let value = value.as_ref().map(|s| s.as_str());
1071 let value = value.as_ref().map(|s| s.as_ref());
1072 if name != "target_feature" || value != Some("crt-static") {
1073 if !allow_unstable_cfg && gated_cfg.is_some() {
1078 if let Some(value) = value {
1079 Some(format!("{}=\"{}\"", name, value))
1081 Some(name.to_string())
1083 }).collect::<Vec<String>>();
1087 println!("{}", cfg);
1090 RelocationModels | CodeModels | TlsModels | TargetCPUs | TargetFeatures => {
1091 codegen_backend.print(*req, sess);
1093 // Any output here interferes with Cargo's parsing of other printed output
1094 PrintRequest::NativeStaticLibs => {}
1097 return Compilation::Stop;
1101 /// Returns a version string such as "0.12.0-dev".
1102 fn release_str() -> Option<&'static str> {
1103 option_env!("CFG_RELEASE")
1106 /// Returns the full SHA1 hash of HEAD of the Git repo from which rustc was built.
1107 fn commit_hash_str() -> Option<&'static str> {
1108 option_env!("CFG_VER_HASH")
1111 /// Returns the "commit date" of HEAD of the Git repo from which rustc was built as a static string.
1112 fn commit_date_str() -> Option<&'static str> {
1113 option_env!("CFG_VER_DATE")
1116 /// Prints version information
1117 pub fn version(binary: &str, matches: &getopts::Matches) {
1118 let verbose = matches.opt_present("verbose");
1120 println!("{} {}", binary, option_env!("CFG_VERSION").unwrap_or("unknown version"));
1123 fn unw(x: Option<&str>) -> &str {
1124 x.unwrap_or("unknown")
1126 println!("binary: {}", binary);
1127 println!("commit-hash: {}", unw(commit_hash_str()));
1128 println!("commit-date: {}", unw(commit_date_str()));
1129 println!("host: {}", config::host_triple());
1130 println!("release: {}", unw(release_str()));
1131 get_codegen_sysroot("llvm")().print_version();
1135 fn usage(verbose: bool, include_unstable_options: bool) {
1136 let groups = if verbose {
1137 config::rustc_optgroups()
1139 config::rustc_short_optgroups()
1141 let mut options = getopts::Options::new();
1142 for option in groups.iter().filter(|x| include_unstable_options || x.is_stable()) {
1143 (option.apply)(&mut options);
1145 let message = "Usage: rustc [OPTIONS] INPUT";
1146 let nightly_help = if nightly_options::is_nightly_build() {
1147 "\n -Z help Print internal options for debugging rustc"
1151 let verbose_help = if verbose {
1154 "\n --help -v Print the full set of options rustc accepts"
1156 println!("{}\nAdditional help:
1157 -C help Print codegen options
1159 Print 'lint' options and default settings{}{}\n",
1160 options.usage(message),
1165 fn print_wall_help() {
1167 The flag `-Wall` does not exist in `rustc`. Most useful lints are enabled by
1168 default. Use `rustc -W help` to see all available lints. It's more common to put
1169 warning settings in the crate root using `#![warn(LINT_NAME)]` instead of using
1170 the command line flag directly.
1174 fn describe_lints(sess: &Session, lint_store: &lint::LintStore, loaded_plugins: bool) {
1176 Available lint options:
1177 -W <foo> Warn about <foo>
1181 -F <foo> Forbid <foo> \
1182 (deny <foo> and all attempts to override)
1186 fn sort_lints(sess: &Session, lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
1187 let mut lints: Vec<_> = lints.into_iter().map(|(x, _)| x).collect();
1188 // The sort doesn't case-fold but it's doubtful we care.
1189 lints.sort_by_cached_key(|x: &&Lint| (x.default_level(sess), x.name));
1193 fn sort_lint_groups(lints: Vec<(&'static str, Vec<lint::LintId>, bool)>)
1194 -> Vec<(&'static str, Vec<lint::LintId>)> {
1195 let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
1196 lints.sort_by_key(|l| l.0);
1200 let (plugin, builtin): (Vec<_>, _) = lint_store.get_lints()
1203 .partition(|&(_, p)| p);
1204 let plugin = sort_lints(sess, plugin);
1205 let builtin = sort_lints(sess, builtin);
1207 let (plugin_groups, builtin_groups): (Vec<_>, _) = lint_store.get_lint_groups()
1210 .partition(|&(.., p)| p);
1211 let plugin_groups = sort_lint_groups(plugin_groups);
1212 let builtin_groups = sort_lint_groups(builtin_groups);
1214 let max_name_len = plugin.iter()
1216 .map(|&s| s.name.chars().count())
1219 let padded = |x: &str| {
1220 let mut s = " ".repeat(max_name_len - x.chars().count());
1225 println!("Lint checks provided by rustc:\n");
1226 println!(" {} {:7.7} {}", padded("name"), "default", "meaning");
1227 println!(" {} {:7.7} {}", padded("----"), "-------", "-------");
1229 let print_lints = |lints: Vec<&Lint>| {
1231 let name = lint.name_lower().replace("_", "-");
1232 println!(" {} {:7.7} {}",
1234 lint.default_level.as_str(),
1240 print_lints(builtin);
1242 let max_name_len = max("warnings".len(),
1243 plugin_groups.iter()
1244 .chain(&builtin_groups)
1245 .map(|&(s, _)| s.chars().count())
1249 let padded = |x: &str| {
1250 let mut s = " ".repeat(max_name_len - x.chars().count());
1255 println!("Lint groups provided by rustc:\n");
1256 println!(" {} {}", padded("name"), "sub-lints");
1257 println!(" {} {}", padded("----"), "---------");
1258 println!(" {} {}", padded("warnings"), "all lints that are set to issue warnings");
1260 let print_lint_groups = |lints: Vec<(&'static str, Vec<lint::LintId>)>| {
1261 for (name, to) in lints {
1262 let name = name.to_lowercase().replace("_", "-");
1263 let desc = to.into_iter()
1264 .map(|x| x.to_string().replace("_", "-"))
1265 .collect::<Vec<String>>()
1267 println!(" {} {}", padded(&name), desc);
1272 print_lint_groups(builtin_groups);
1274 match (loaded_plugins, plugin.len(), plugin_groups.len()) {
1275 (false, 0, _) | (false, _, 0) => {
1276 println!("Compiler plugins can provide additional lints and lint groups. To see a \
1277 listing of these, re-run `rustc -W help` with a crate filename.");
1279 (false, ..) => panic!("didn't load lint plugins but got them anyway!"),
1280 (true, 0, 0) => println!("This crate does not load any lint plugins or lint groups."),
1283 println!("Lint checks provided by plugins loaded by this crate:\n");
1284 print_lints(plugin);
1287 println!("Lint groups provided by plugins loaded by this crate:\n");
1288 print_lint_groups(plugin_groups);
1294 fn describe_debug_flags() {
1295 println!("\nAvailable debug options:\n");
1296 print_flag_list("-Z", config::DB_OPTIONS);
1299 fn describe_codegen_flags() {
1300 println!("\nAvailable codegen options:\n");
1301 print_flag_list("-C", config::CG_OPTIONS);
1304 fn print_flag_list<T>(cmdline_opt: &str,
1305 flag_list: &[(&'static str, T, Option<&'static str>, &'static str)]) {
1306 let max_len = flag_list.iter()
1307 .map(|&(name, _, opt_type_desc, _)| {
1308 let extra_len = match opt_type_desc {
1312 name.chars().count() + extra_len
1317 for &(name, _, opt_type_desc, desc) in flag_list {
1318 let (width, extra) = match opt_type_desc {
1319 Some(..) => (max_len - 4, "=val"),
1320 None => (max_len, ""),
1322 println!(" {} {:>width$}{} -- {}",
1324 name.replace("_", "-"),
1331 /// Process command line options. Emits messages as appropriate. If compilation
1332 /// should continue, returns a getopts::Matches object parsed from args,
1333 /// otherwise returns None.
1335 /// The compiler's handling of options is a little complicated as it ties into
1336 /// our stability story, and it's even *more* complicated by historical
1337 /// accidents. The current intention of each compiler option is to have one of
1340 /// 1. An option is stable and can be used everywhere.
1341 /// 2. An option is unstable, but was historically allowed on the stable
1343 /// 3. An option is unstable, and can only be used on nightly.
1345 /// Like unstable library and language features, however, unstable options have
1346 /// always required a form of "opt in" to indicate that you're using them. This
1347 /// provides the easy ability to scan a code base to check to see if anything
1348 /// unstable is being used. Currently, this "opt in" is the `-Z` "zed" flag.
1350 /// All options behind `-Z` are considered unstable by default. Other top-level
1351 /// options can also be considered unstable, and they were unlocked through the
1352 /// `-Z unstable-options` flag. Note that `-Z` remains to be the root of
1353 /// instability in both cases, though.
1355 /// So with all that in mind, the comments below have some more detail about the
1356 /// contortions done here to get things to work out correctly.
1357 pub fn handle_options(args: &[String]) -> Option<getopts::Matches> {
1358 // Throw away the first argument, the name of the binary
1359 let args = &args[1..];
1361 if args.is_empty() {
1362 // user did not write `-v` nor `-Z unstable-options`, so do not
1363 // include that extra information.
1364 usage(false, false);
1368 // Parse with *all* options defined in the compiler, we don't worry about
1369 // option stability here we just want to parse as much as possible.
1370 let mut options = getopts::Options::new();
1371 for option in config::rustc_optgroups() {
1372 (option.apply)(&mut options);
1374 let matches = options.parse(args).unwrap_or_else(|f|
1375 early_error(ErrorOutputType::default(), &f.to_string()));
1377 // For all options we just parsed, we check a few aspects:
1379 // * If the option is stable, we're all good
1380 // * If the option wasn't passed, we're all good
1381 // * If `-Z unstable-options` wasn't passed (and we're not a -Z option
1382 // ourselves), then we require the `-Z unstable-options` flag to unlock
1383 // this option that was passed.
1384 // * If we're a nightly compiler, then unstable options are now unlocked, so
1385 // we're good to go.
1386 // * Otherwise, if we're a truly unstable option then we generate an error
1387 // (unstable option being used on stable)
1388 // * If we're a historically stable-but-should-be-unstable option then we
1389 // emit a warning that we're going to turn this into an error soon.
1390 nightly_options::check_nightly_options(&matches, &config::rustc_optgroups());
1392 if matches.opt_present("h") || matches.opt_present("help") {
1393 // Only show unstable options in --help if we *really* accept unstable
1394 // options, which catches the case where we got `-Z unstable-options` on
1395 // the stable channel of Rust which was accidentally allowed
1397 usage(matches.opt_present("verbose"),
1398 nightly_options::is_unstable_enabled(&matches));
1402 // Handle the special case of -Wall.
1403 let wall = matches.opt_strs("W");
1404 if wall.iter().any(|x| *x == "all") {
1409 // Don't handle -W help here, because we might first load plugins.
1410 let r = matches.opt_strs("Z");
1411 if r.iter().any(|x| *x == "help") {
1412 describe_debug_flags();
1416 let cg_flags = matches.opt_strs("C");
1418 if cg_flags.iter().any(|x| *x == "help") {
1419 describe_codegen_flags();
1423 if cg_flags.iter().any(|x| *x == "no-stack-check") {
1424 early_warn(ErrorOutputType::default(),
1425 "the --no-stack-check flag is deprecated and does nothing");
1428 if cg_flags.iter().any(|x| *x == "passes=list") {
1429 get_codegen_sysroot("llvm")().print_passes();
1433 if matches.opt_present("version") {
1434 version("rustc", &matches);
1441 fn parse_crate_attrs<'a>(sess: &'a Session, input: &Input) -> PResult<'a, Vec<ast::Attribute>> {
1443 Input::File(ref ifile) => {
1444 parse::parse_crate_attrs_from_file(ifile, &sess.parse_sess)
1446 Input::Str { ref name, ref input } => {
1447 parse::parse_crate_attrs_from_source_str(name.clone(),
1454 // Temporarily have stack size set to 32MB to deal with various crates with long method
1455 // chains or deep syntax trees.
1456 // FIXME(oli-obk): get https://github.com/rust-lang/rust/pull/55617 the finish line
1457 const STACK_SIZE: usize = 32 * 1024 * 1024; // 32MB
1459 /// Runs `f` in a suitable thread for running `rustc`; returns a `Result` with either the return
1460 /// value of `f` or -- if a panic occurs -- the panic value.
1462 /// This version applies the given name to the thread. This is used by rustdoc to ensure consistent
1463 /// doctest output across platforms and executions.
1464 pub fn in_named_rustc_thread<F, R>(name: String, f: F) -> Result<R, Box<dyn Any + Send>>
1465 where F: FnOnce() -> R + Send + 'static,
1468 // We need a thread for soundness of thread local storage in rustc. For debugging purposes
1469 // we allow an escape hatch where everything runs on the main thread.
1470 if env::var_os("RUSTC_UNSTABLE_NO_MAIN_THREAD").is_none() {
1471 let mut cfg = thread::Builder::new().name(name);
1473 // If the env is trying to override the stack size then *don't* set it explicitly.
1474 // The libstd thread impl will fetch the `RUST_MIN_STACK` env var itself.
1475 if env::var_os("RUST_MIN_STACK").is_none() {
1476 cfg = cfg.stack_size(STACK_SIZE);
1479 let thread = cfg.spawn(f);
1480 thread.unwrap().join()
1482 let f = panic::AssertUnwindSafe(f);
1483 panic::catch_unwind(f)
1487 /// Runs `f` in a suitable thread for running `rustc`; returns a
1488 /// `Result` with either the return value of `f` or -- if a panic
1489 /// occurs -- the panic value.
1490 pub fn in_rustc_thread<F, R>(f: F) -> Result<R, Box<dyn Any + Send>>
1491 where F: FnOnce() -> R + Send + 'static,
1494 in_named_rustc_thread("rustc".to_string(), f)
1497 /// Get a list of extra command-line flags provided by the user, as strings.
1499 /// This function is used during ICEs to show more information useful for
1500 /// debugging, since some ICEs only happens with non-default compiler flags
1501 /// (and the users don't always report them).
1502 fn extra_compiler_flags() -> Option<(Vec<String>, bool)> {
1503 let args = env::args_os().map(|arg| arg.to_string_lossy().to_string()).collect::<Vec<_>>();
1505 // Avoid printing help because of empty args. This can suggest the compiler
1506 // itself is not the program root (consider RLS).
1511 let matches = if let Some(matches) = handle_options(&args) {
1517 let mut result = Vec::new();
1518 let mut excluded_cargo_defaults = false;
1519 for flag in ICE_REPORT_COMPILER_FLAGS {
1520 let prefix = if flag.len() == 1 { "-" } else { "--" };
1522 for content in &matches.opt_strs(flag) {
1523 // Split always returns the first element
1524 let name = if let Some(first) = content.split('=').next() {
1530 let content = if ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE.contains(&name) {
1536 if !ICE_REPORT_COMPILER_FLAGS_EXCLUDE.contains(&name) {
1537 result.push(format!("{}{} {}", prefix, flag, content));
1539 excluded_cargo_defaults = true;
1544 if !result.is_empty() {
1545 Some((result, excluded_cargo_defaults))
1552 pub struct CompilationFailure;
1554 impl Error for CompilationFailure {}
1556 impl Display for CompilationFailure {
1557 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
1558 write!(f, "compilation had errors")
1562 /// Run a procedure which will detect panics in the compiler and print nicer
1563 /// error messages rather than just failing the test.
1565 /// The diagnostic emitter yielded to the procedure should be used for reporting
1566 /// errors of the compiler.
1567 pub fn monitor<F: FnOnce() + Send + 'static>(f: F) -> Result<(), CompilationFailure> {
1568 in_rustc_thread(move || {
1570 }).map_err(|value| {
1571 if value.is::<errors::FatalErrorMarker>() {
1574 // Thread panicked without emitting a fatal diagnostic
1578 Box::new(errors::emitter::EmitterWriter::stderr(errors::ColorConfig::Auto,
1582 let handler = errors::Handler::with_emitter(true, false, emitter);
1584 // a .span_bug or .bug call has already printed what
1585 // it wants to print.
1586 if !value.is::<errors::ExplicitBug>() {
1587 handler.emit(&MultiSpan::new(),
1589 errors::Level::Bug);
1592 let mut xs: Vec<Cow<'static, str>> = vec![
1593 "the compiler unexpectedly panicked. this is a bug.".into(),
1594 format!("we would appreciate a bug report: {}", BUG_REPORT_URL).into(),
1595 format!("rustc {} running on {}",
1596 option_env!("CFG_VERSION").unwrap_or("unknown_version"),
1597 config::host_triple()).into(),
1600 if let Some((flags, excluded_cargo_defaults)) = extra_compiler_flags() {
1601 xs.push(format!("compiler flags: {}", flags.join(" ")).into());
1603 if excluded_cargo_defaults {
1604 xs.push("some of the compiler flags provided by cargo are hidden".into());
1609 handler.emit(&MultiSpan::new(),
1611 errors::Level::Note);
1614 panic::resume_unwind(Box::new(errors::FatalErrorMarker));
1619 pub fn diagnostics_registry() -> errors::registry::Registry {
1620 use errors::registry::Registry;
1622 let mut all_errors = Vec::new();
1623 all_errors.extend_from_slice(&rustc::DIAGNOSTICS);
1624 all_errors.extend_from_slice(&rustc_typeck::DIAGNOSTICS);
1625 all_errors.extend_from_slice(&rustc_resolve::DIAGNOSTICS);
1626 all_errors.extend_from_slice(&rustc_privacy::DIAGNOSTICS);
1627 // FIXME: need to figure out a way to get these back in here
1628 // all_errors.extend_from_slice(get_codegen_backend(sess).diagnostics());
1629 all_errors.extend_from_slice(&rustc_metadata::DIAGNOSTICS);
1630 all_errors.extend_from_slice(&rustc_passes::DIAGNOSTICS);
1631 all_errors.extend_from_slice(&rustc_plugin::DIAGNOSTICS);
1632 all_errors.extend_from_slice(&rustc_mir::DIAGNOSTICS);
1633 all_errors.extend_from_slice(&syntax::DIAGNOSTICS);
1635 Registry::new(&all_errors)
1638 /// This allows tools to enable rust logging without having to magically match rustc's
1639 /// log crate version
1640 pub fn init_rustc_env_logger() {
1645 init_rustc_env_logger();
1646 let result = run(|| {
1647 let args = env::args_os().enumerate()
1648 .map(|(i, arg)| arg.into_string().unwrap_or_else(|arg| {
1649 early_error(ErrorOutputType::default(),
1650 &format!("Argument {} is not valid Unicode: {:?}", i, arg))
1652 .collect::<Vec<_>>();
1654 Box::new(RustcDefaultCalls),
1658 process::exit(result as i32);