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 // Note that the linkage here should be all that we need, on Linux we're not
67 // prefixing the symbols here so this should naturally override our default
68 // allocator. On OSX it should override via the zone allocator. We shouldn't
69 // enable this by default on other platforms, so other platforms aren't handled
71 #[cfg(feature = "jemalloc-sys")]
72 extern crate jemalloc_sys;
74 use driver::CompileController;
75 use pretty::{PpMode, UserIdentifiedItem};
77 use rustc_resolve as resolve;
78 use rustc_save_analysis as save;
79 use rustc_save_analysis::DumpHandler;
80 use rustc_data_structures::sync::{self, Lrc};
81 use rustc_data_structures::OnDrop;
82 use rustc::session::{self, config, Session, build_session, CompileResult};
83 use rustc::session::CompileIncomplete;
84 use rustc::session::config::{Input, PrintRequest, ErrorOutputType};
85 use rustc::session::config::nightly_options;
86 use rustc::session::filesearch;
87 use rustc::session::{early_error, early_warn};
88 use rustc::lint::Lint;
90 use rustc_metadata::locator;
91 use rustc_metadata::cstore::CStore;
92 use rustc_metadata::dynamic_lib::DynamicLibrary;
93 use rustc::util::common::{time, ErrorReported};
94 use rustc_codegen_utils::codegen_backend::CodegenBackend;
96 use serialize::json::ToJson;
101 use std::default::Default;
102 use std::env::consts::{DLL_PREFIX, DLL_SUFFIX};
104 use std::error::Error;
105 use std::ffi::OsString;
106 use std::fmt::{self, Display};
107 use std::io::{self, Read, Write};
110 use std::path::{PathBuf, Path};
111 use std::process::{self, Command, Stdio};
113 use std::sync::atomic::{AtomicBool, ATOMIC_BOOL_INIT, Ordering};
114 use std::sync::{Once, ONCE_INIT};
118 use syntax::source_map::{SourceMap, FileLoader, RealFileLoader};
119 use syntax::feature_gate::{GatedCfg, UnstableFeatures};
120 use syntax::parse::{self, PResult};
121 use syntax_pos::{DUMMY_SP, MultiSpan, FileName};
129 mod proc_macro_decls;
131 pub mod target_features {
133 use syntax::symbol::Symbol;
134 use rustc::session::Session;
135 use rustc_codegen_utils::codegen_backend::CodegenBackend;
137 /// Add `target_feature = "..."` cfgs for a variety of platform
138 /// specific features (SSE, NEON etc.).
140 /// This is performed by checking whether a whitelisted set of
141 /// features is available on the target machine, by querying LLVM.
142 pub fn add_configuration(cfg: &mut ast::CrateConfig,
144 codegen_backend: &dyn CodegenBackend) {
145 let tf = Symbol::intern("target_feature");
147 cfg.extend(codegen_backend.target_features(sess).into_iter().map(|feat| (tf, Some(feat))));
149 if sess.crt_static_feature() {
150 cfg.insert((tf, Some(Symbol::intern("crt-static"))));
155 /// Exit status code used for successful compilation and help output.
156 pub const EXIT_SUCCESS: isize = 0;
158 /// Exit status code used for compilation failures and invalid flags.
159 pub const EXIT_FAILURE: isize = 1;
161 const BUG_REPORT_URL: &str = "https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.\
164 const ICE_REPORT_COMPILER_FLAGS: &[&str] = &["Z", "C", "crate-type"];
166 const ICE_REPORT_COMPILER_FLAGS_EXCLUDE: &[&str] = &["metadata", "extra-filename"];
168 const ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE: &[&str] = &["incremental"];
170 pub fn abort_on_err<T>(result: Result<T, CompileIncomplete>, sess: &Session) -> T {
172 Err(CompileIncomplete::Errored(ErrorReported)) => {
173 sess.abort_if_errors();
174 panic!("error reported but abort_if_errors didn't abort???");
176 Err(CompileIncomplete::Stopped) => {
177 sess.fatal("compilation terminated");
183 pub fn run<F>(run_compiler: F) -> isize
184 where F: FnOnce() -> (CompileResult, Option<Session>) + Send + 'static
186 let result = monitor(move || {
187 syntax::with_globals(|| {
188 let (result, session) = run_compiler();
189 if let Err(CompileIncomplete::Errored(_)) = result {
192 sess.abort_if_errors();
193 panic!("error reported but abort_if_errors didn't abort???");
197 errors::emitter::EmitterWriter::stderr(
198 errors::ColorConfig::Auto,
203 let handler = errors::Handler::with_emitter(true, false, Box::new(emitter));
204 handler.emit(&MultiSpan::new(),
205 "aborting due to previous error(s)",
206 errors::Level::Fatal);
207 panic::resume_unwind(Box::new(errors::FatalErrorMarker));
215 Ok(()) => EXIT_SUCCESS,
216 Err(_) => EXIT_FAILURE,
220 fn load_backend_from_dylib(path: &Path) -> fn() -> Box<dyn CodegenBackend> {
221 // Note that we're specifically using `open_global_now` here rather than
222 // `open`, namely we want the behavior on Unix of RTLD_GLOBAL and RTLD_NOW,
223 // where NOW means "bind everything right now" because we don't want
224 // surprises later on and RTLD_GLOBAL allows the symbols to be made
225 // available for future dynamic libraries opened. This is currently used by
226 // loading LLVM and then making its symbols available for other dynamic
228 let lib = DynamicLibrary::open_global_now(path).unwrap_or_else(|err| {
229 let err = format!("couldn't load codegen backend {:?}: {:?}", path, err);
230 early_error(ErrorOutputType::default(), &err);
233 match lib.symbol("__rustc_codegen_backend") {
236 mem::transmute::<*mut u8, _>(f)
239 let err = format!("couldn't load codegen backend as it \
240 doesn't export the `__rustc_codegen_backend` \
242 early_error(ErrorOutputType::default(), &err);
248 pub fn get_codegen_backend(sess: &Session) -> Box<dyn CodegenBackend> {
249 static INIT: Once = ONCE_INIT;
253 static mut LOAD: fn() -> Box<dyn CodegenBackend> = || unreachable!();
256 let codegen_name = sess.opts.debugging_opts.codegen_backend.as_ref()
257 .unwrap_or(&sess.target.target.options.codegen_backend);
258 let backend = match &codegen_name[..] {
260 rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::boxed
262 filename if filename.contains(".") => {
263 load_backend_from_dylib(filename.as_ref())
265 codegen_name => get_codegen_sysroot(codegen_name),
272 let backend = unsafe { LOAD() };
277 fn get_codegen_sysroot(backend_name: &str) -> fn() -> Box<dyn CodegenBackend> {
278 // For now we only allow this function to be called once as it'll dlopen a
279 // few things, which seems to work best if we only do that once. In
280 // general this assertion never trips due to the once guard in `get_codegen_backend`,
281 // but there's a few manual calls to this function in this file we protect
283 static LOADED: AtomicBool = ATOMIC_BOOL_INIT;
284 assert!(!LOADED.fetch_or(true, Ordering::SeqCst),
285 "cannot load the default codegen backend twice");
287 // When we're compiling this library with `--test` it'll run as a binary but
288 // not actually exercise much functionality. As a result most of the logic
289 // here is defunkt (it assumes we're a dynamic library in a sysroot) so
290 // let's just return a dummy creation function which won't be used in
293 return rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::boxed
296 let target = session::config::host_triple();
297 let mut sysroot_candidates = vec![filesearch::get_or_default_sysroot()];
298 let path = current_dll_path()
299 .and_then(|s| s.canonicalize().ok());
300 if let Some(dll) = path {
301 // use `parent` twice to chop off the file name and then also the
302 // directory containing the dll which should be either `lib` or `bin`.
303 if let Some(path) = dll.parent().and_then(|p| p.parent()) {
304 // The original `path` pointed at the `rustc_driver` crate's dll.
305 // Now that dll should only be in one of two locations. The first is
306 // in the compiler's libdir, for example `$sysroot/lib/*.dll`. The
307 // other is the target's libdir, for example
308 // `$sysroot/lib/rustlib/$target/lib/*.dll`.
310 // We don't know which, so let's assume that if our `path` above
311 // ends in `$target` we *could* be in the target libdir, and always
312 // assume that we may be in the main libdir.
313 sysroot_candidates.push(path.to_owned());
315 if path.ends_with(target) {
316 sysroot_candidates.extend(path.parent() // chop off `$target`
317 .and_then(|p| p.parent()) // chop off `rustlib`
318 .and_then(|p| p.parent()) // chop off `lib`
319 .map(|s| s.to_owned()));
324 let sysroot = sysroot_candidates.iter()
326 let libdir = filesearch::relative_target_lib_path(&sysroot, &target);
327 sysroot.join(libdir).with_file_name(
328 option_env!("CFG_CODEGEN_BACKENDS_DIR").unwrap_or("codegen-backends"))
331 info!("codegen backend candidate: {}", f.display());
335 let sysroot = sysroot.unwrap_or_else(|| {
336 let candidates = sysroot_candidates.iter()
337 .map(|p| p.display().to_string())
340 let err = format!("failed to find a `codegen-backends` folder \
341 in the sysroot candidates:\n* {}", candidates);
342 early_error(ErrorOutputType::default(), &err);
344 info!("probing {} for a codegen backend", sysroot.display());
346 let d = sysroot.read_dir().unwrap_or_else(|e| {
347 let err = format!("failed to load default codegen backend, couldn't \
348 read `{}`: {}", sysroot.display(), e);
349 early_error(ErrorOutputType::default(), &err);
352 let mut file: Option<PathBuf> = None;
354 let expected_name = format!("rustc_codegen_llvm-{}", backend_name);
355 for entry in d.filter_map(|e| e.ok()) {
356 let path = entry.path();
357 let filename = match path.file_name().and_then(|s| s.to_str()) {
361 if !(filename.starts_with(DLL_PREFIX) && filename.ends_with(DLL_SUFFIX)) {
364 let name = &filename[DLL_PREFIX.len() .. filename.len() - DLL_SUFFIX.len()];
365 if name != expected_name {
368 if let Some(ref prev) = file {
369 let err = format!("duplicate codegen backends found\n\
372 ", prev.display(), path.display());
373 early_error(ErrorOutputType::default(), &err);
375 file = Some(path.clone());
379 Some(ref s) => return load_backend_from_dylib(s),
381 let err = format!("failed to load default codegen backend for `{}`, \
382 no appropriate codegen dylib found in `{}`",
383 backend_name, sysroot.display());
384 early_error(ErrorOutputType::default(), &err);
389 fn current_dll_path() -> Option<PathBuf> {
390 use std::ffi::{OsStr, CStr};
391 use std::os::unix::prelude::*;
394 let addr = current_dll_path as usize as *mut _;
395 let mut info = mem::zeroed();
396 if libc::dladdr(addr, &mut info) == 0 {
397 info!("dladdr failed");
400 if info.dli_fname.is_null() {
401 info!("dladdr returned null pointer");
404 let bytes = CStr::from_ptr(info.dli_fname).to_bytes();
405 let os = OsStr::from_bytes(bytes);
406 Some(PathBuf::from(os))
411 fn current_dll_path() -> Option<PathBuf> {
412 use std::ffi::OsString;
413 use std::os::windows::prelude::*;
416 fn GetModuleHandleExW(dwFlags: u32,
418 phModule: *mut usize) -> i32;
419 fn GetModuleFileNameW(hModule: usize,
420 lpFilename: *mut u16,
424 const GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS: u32 = 0x00000004;
428 let r = GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
429 current_dll_path as usize,
432 info!("GetModuleHandleExW failed: {}", io::Error::last_os_error());
435 let mut space = Vec::with_capacity(1024);
436 let r = GetModuleFileNameW(module,
438 space.capacity() as u32);
440 info!("GetModuleFileNameW failed: {}", io::Error::last_os_error());
444 if r >= space.capacity() {
445 info!("our buffer was too small? {}",
446 io::Error::last_os_error());
450 let os = OsString::from_wide(&space);
451 Some(PathBuf::from(os))
456 // Parse args and run the compiler. This is the primary entry point for rustc.
457 // See comments on CompilerCalls below for details about the callbacks argument.
458 // The FileLoader provides a way to load files from sources other than the file system.
459 pub fn run_compiler<'a>(args: &[String],
460 callbacks: Box<dyn CompilerCalls<'a> + sync::Send + 'a>,
461 file_loader: Option<Box<dyn FileLoader + Send + Sync + 'static>>,
462 emitter_dest: Option<Box<dyn Write + Send>>)
463 -> (CompileResult, Option<Session>)
465 let matches = match handle_options(args) {
466 Some(matches) => matches,
467 None => return (Ok(()), None),
470 let (sopts, cfg) = config::build_session_options_and_crate_config(&matches);
472 driver::spawn_thread_pool(sopts, |sopts| {
473 run_compiler_with_pool(matches, sopts, cfg, callbacks, file_loader, emitter_dest)
477 fn run_compiler_with_pool<'a>(
478 matches: getopts::Matches,
479 sopts: config::Options,
480 cfg: ast::CrateConfig,
481 mut callbacks: Box<dyn CompilerCalls<'a> + sync::Send + 'a>,
482 file_loader: Option<Box<dyn FileLoader + Send + Sync + 'static>>,
483 emitter_dest: Option<Box<dyn Write + Send>>
484 ) -> (CompileResult, Option<Session>) {
485 macro_rules! do_or_return {($expr: expr, $sess: expr) => {
487 Compilation::Stop => return (Ok(()), $sess),
488 Compilation::Continue => {}
492 let descriptions = diagnostics_registry();
494 do_or_return!(callbacks.early_callback(&matches,
501 let (odir, ofile) = make_output(&matches);
502 let (input, input_file_path, input_err) = match make_input(&matches.free) {
503 Some((input, input_file_path, input_err)) => {
504 let (input, input_file_path) = callbacks.some_input(input, input_file_path);
505 (input, input_file_path, input_err)
507 None => match callbacks.no_input(&matches, &sopts, &cfg, &odir, &ofile, &descriptions) {
508 Some((input, input_file_path)) => (input, input_file_path, None),
509 None => return (Ok(()), None),
513 let loader = file_loader.unwrap_or(box RealFileLoader);
514 let source_map = Lrc::new(SourceMap::with_file_loader(loader, sopts.file_path_mapping()));
515 let mut sess = session::build_session_with_source_map(
516 sopts, input_file_path.clone(), descriptions, source_map, emitter_dest,
519 if let Some(err) = input_err {
520 // Immediately stop compilation if there was an issue reading
521 // the input (for example if the input stream is not UTF-8).
522 sess.err(&err.to_string());
523 return (Err(CompileIncomplete::Stopped), Some(sess));
526 let codegen_backend = get_codegen_backend(&sess);
528 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
530 let mut cfg = config::build_configuration(&sess, cfg);
531 target_features::add_configuration(&mut cfg, &sess, &*codegen_backend);
532 sess.parse_sess.config = cfg;
535 let plugins = sess.opts.debugging_opts.extra_plugins.clone();
537 let cstore = CStore::new(codegen_backend.metadata_loader());
539 do_or_return!(callbacks.late_callback(&*codegen_backend,
545 &ofile), Some(sess));
547 let _sess_abort_error = OnDrop(|| sess.diagnostic().print_error_count());
549 let control = callbacks.build_controller(&sess, &matches);
551 driver::compile_input(codegen_backend,
566 pub fn set_sigpipe_handler() {
568 // Set the SIGPIPE signal handler, so that an EPIPE
569 // will cause rustc to terminate, as expected.
570 assert_ne!(libc::signal(libc::SIGPIPE, libc::SIG_DFL), libc::SIG_ERR);
575 pub fn set_sigpipe_handler() {}
577 // Extract output directory and file from matches.
578 fn make_output(matches: &getopts::Matches) -> (Option<PathBuf>, Option<PathBuf>) {
579 let odir = matches.opt_str("out-dir").map(|o| PathBuf::from(&o));
580 let ofile = matches.opt_str("o").map(|o| PathBuf::from(&o));
584 // Extract input (string or file and optional path) from matches.
585 fn make_input(free_matches: &[String]) -> Option<(Input, Option<PathBuf>, Option<io::Error>)> {
586 if free_matches.len() == 1 {
587 let ifile = &free_matches[0];
589 let mut src = String::new();
590 let err = if io::stdin().read_to_string(&mut src).is_err() {
591 Some(io::Error::new(io::ErrorKind::InvalidData,
592 "couldn't read from stdin, as it did not contain valid UTF-8"))
596 Some((Input::Str { name: FileName::anon_source_code(&src), input: src },
599 Some((Input::File(PathBuf::from(ifile)),
600 Some(PathBuf::from(ifile)), None))
607 fn parse_pretty(sess: &Session,
608 matches: &getopts::Matches)
609 -> Option<(PpMode, Option<UserIdentifiedItem>)> {
610 let pretty = if sess.opts.debugging_opts.unstable_options {
611 matches.opt_default("pretty", "normal").map(|a| {
612 // stable pretty-print variants only
613 pretty::parse_pretty(sess, &a, false)
619 if pretty.is_none() {
620 sess.opts.debugging_opts.unpretty.as_ref().map(|a| {
621 // extended with unstable pretty-print variants
622 pretty::parse_pretty(sess, &a, true)
629 // Whether to stop or continue compilation.
630 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
631 pub enum Compilation {
637 pub fn and_then<F: FnOnce() -> Compilation>(self, next: F) -> Compilation {
639 Compilation::Stop => Compilation::Stop,
640 Compilation::Continue => next(),
645 /// A trait for customizing the compilation process. Offers a number of hooks for
646 /// executing custom code or customizing input.
647 pub trait CompilerCalls<'a> {
648 /// Hook for a callback early in the process of handling arguments. This will
649 /// be called straight after options have been parsed but before anything
650 /// else (e.g., selecting input and output).
651 fn early_callback(&mut self,
652 _: &getopts::Matches,
654 _: &ast::CrateConfig,
655 _: &errors::registry::Registry,
658 Compilation::Continue
661 /// Hook for a callback late in the process of handling arguments. This will
662 /// be called just before actual compilation starts (and before build_controller
663 /// is called), after all arguments etc. have been completely handled.
664 fn late_callback(&mut self,
665 _: &dyn CodegenBackend,
666 _: &getopts::Matches,
673 Compilation::Continue
676 /// Called after we extract the input from the arguments. Gives the implementer
677 /// an opportunity to change the inputs or to add some custom input handling.
678 /// The default behaviour is to simply pass through the inputs.
679 fn some_input(&mut self,
681 input_path: Option<PathBuf>)
682 -> (Input, Option<PathBuf>) {
686 /// Called after we extract the input from the arguments if there is no valid
687 /// input. Gives the implementer an opportunity to supply alternate input (by
688 /// returning a Some value) or to add custom behaviour for this error such as
689 /// emitting error messages. Returning None will cause compilation to stop
691 fn no_input(&mut self,
692 _: &getopts::Matches,
694 _: &ast::CrateConfig,
697 _: &errors::registry::Registry)
698 -> Option<(Input, Option<PathBuf>)> {
702 // Create a CompilController struct for controlling the behaviour of
708 ) -> CompileController<'a>;
711 /// CompilerCalls instance for a regular rustc build.
712 #[derive(Copy, Clone)]
713 pub struct RustcDefaultCalls;
715 // FIXME remove these and use winapi 0.3 instead
716 // Duplicates: bootstrap/compile.rs, librustc_errors/emitter.rs
718 fn stdout_isatty() -> bool {
719 unsafe { libc::isatty(libc::STDOUT_FILENO) != 0 }
723 fn stdout_isatty() -> bool {
726 type HANDLE = *mut u8;
727 type LPDWORD = *mut u32;
728 const STD_OUTPUT_HANDLE: DWORD = -11i32 as DWORD;
730 fn GetStdHandle(which: DWORD) -> HANDLE;
731 fn GetConsoleMode(hConsoleHandle: HANDLE, lpMode: LPDWORD) -> BOOL;
734 let handle = GetStdHandle(STD_OUTPUT_HANDLE);
736 GetConsoleMode(handle, &mut out) != 0
740 fn handle_explain(code: &str,
741 descriptions: &errors::registry::Registry,
742 output: ErrorOutputType) {
743 let normalised = if code.starts_with("E") {
746 format!("E{0:0>4}", code)
748 match descriptions.find_description(&normalised) {
749 Some(ref description) => {
750 let mut is_in_code_block = false;
751 let mut text = String::new();
753 // Slice off the leading newline and print.
754 for line in description[1..].lines() {
755 let indent_level = line.find(|c: char| !c.is_whitespace())
756 .unwrap_or_else(|| line.len());
757 let dedented_line = &line[indent_level..];
758 if dedented_line.starts_with("```") {
759 is_in_code_block = !is_in_code_block;
760 text.push_str(&line[..(indent_level+3)]);
761 } else if is_in_code_block && dedented_line.starts_with("# ") {
770 show_content_with_pager(&text);
776 early_error(output, &format!("no extended information for {}", code));
781 fn show_content_with_pager(content: &String) {
782 let pager_name = env::var_os("PAGER").unwrap_or_else(|| if cfg!(windows) {
783 OsString::from("more.com")
785 OsString::from("less")
788 let mut fallback_to_println = false;
790 match Command::new(pager_name).stdin(Stdio::piped()).spawn() {
792 if let Some(pipe) = pager.stdin.as_mut() {
793 if pipe.write_all(content.as_bytes()).is_err() {
794 fallback_to_println = true;
798 if pager.wait().is_err() {
799 fallback_to_println = true;
803 fallback_to_println = true;
807 // If pager fails for whatever reason, we should still print the content
808 // to standard output
809 if fallback_to_println {
810 print!("{}", content);
814 impl<'a> CompilerCalls<'a> for RustcDefaultCalls {
815 fn early_callback(&mut self,
816 matches: &getopts::Matches,
818 _: &ast::CrateConfig,
819 descriptions: &errors::registry::Registry,
820 output: ErrorOutputType)
822 if let Some(ref code) = matches.opt_str("explain") {
823 handle_explain(code, descriptions, output);
824 return Compilation::Stop;
827 Compilation::Continue
830 fn no_input(&mut self,
831 matches: &getopts::Matches,
832 sopts: &config::Options,
833 cfg: &ast::CrateConfig,
834 odir: &Option<PathBuf>,
835 ofile: &Option<PathBuf>,
836 descriptions: &errors::registry::Registry)
837 -> Option<(Input, Option<PathBuf>)> {
838 match matches.free.len() {
840 let mut sess = build_session(sopts.clone(),
842 descriptions.clone());
843 if sopts.describe_lints {
844 let mut ls = lint::LintStore::new();
845 rustc_lint::register_builtins(&mut ls, Some(&sess));
846 describe_lints(&sess, &ls, false);
849 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
850 let mut cfg = config::build_configuration(&sess, cfg.clone());
851 let codegen_backend = get_codegen_backend(&sess);
852 target_features::add_configuration(&mut cfg, &sess, &*codegen_backend);
853 sess.parse_sess.config = cfg;
854 let should_stop = RustcDefaultCalls::print_crate_info(
862 if should_stop == Compilation::Stop {
865 early_error(sopts.error_format, "no input filename given");
867 1 => panic!("make_input should have provided valid inputs"),
868 _ => early_error(sopts.error_format, "multiple input filenames provided"),
872 fn late_callback(&mut self,
873 codegen_backend: &dyn CodegenBackend,
874 matches: &getopts::Matches,
878 odir: &Option<PathBuf>,
879 ofile: &Option<PathBuf>)
881 RustcDefaultCalls::print_crate_info(codegen_backend, sess, Some(input), odir, ofile)
882 .and_then(|| RustcDefaultCalls::list_metadata(sess, cstore, matches, input))
885 fn build_controller(self: Box<Self>,
887 matches: &getopts::Matches)
888 -> CompileController<'a> {
889 let mut control = CompileController::basic();
891 control.keep_ast = sess.opts.debugging_opts.keep_ast;
892 control.continue_parse_after_error = sess.opts.debugging_opts.continue_parse_after_error;
894 if let Some((ppm, opt_uii)) = parse_pretty(sess, matches) {
895 if ppm.needs_ast_map(&opt_uii) {
896 control.after_hir_lowering.stop = Compilation::Stop;
898 control.after_parse.callback = box move |state| {
899 state.krate = Some(pretty::fold_crate(state.session,
900 state.krate.take().unwrap(),
903 control.after_hir_lowering.callback = box move |state| {
904 pretty::print_after_hir_lowering(state.session,
905 state.cstore.unwrap(),
906 state.hir_map.unwrap(),
907 state.analysis.unwrap(),
908 state.resolutions.unwrap(),
910 &state.expanded_crate.take().unwrap(),
911 state.crate_name.unwrap(),
913 state.output_filenames.unwrap(),
918 control.after_parse.stop = Compilation::Stop;
920 control.after_parse.callback = box move |state| {
921 let krate = pretty::fold_crate(state.session, state.krate.take().unwrap(), ppm);
922 pretty::print_after_parsing(state.session,
933 if sess.opts.debugging_opts.parse_only ||
934 sess.opts.debugging_opts.show_span.is_some() ||
935 sess.opts.debugging_opts.ast_json_noexpand {
936 control.after_parse.stop = Compilation::Stop;
939 if sess.opts.debugging_opts.no_analysis ||
940 sess.opts.debugging_opts.ast_json {
941 control.after_hir_lowering.stop = Compilation::Stop;
944 if sess.opts.debugging_opts.save_analysis {
945 enable_save_analysis(&mut control);
948 if sess.print_fuel_crate.is_some() {
949 let old_callback = control.compilation_done.callback;
950 control.compilation_done.callback = box move |state| {
952 let sess = state.session;
953 eprintln!("Fuel used by {}: {}",
954 sess.print_fuel_crate.as_ref().unwrap(),
955 sess.print_fuel.get());
962 pub fn enable_save_analysis(control: &mut CompileController) {
963 control.keep_ast = true;
964 control.after_analysis.callback = box |state| {
965 time(state.session, "save analysis", || {
966 save::process_crate(state.tcx.unwrap(),
967 state.expanded_crate.unwrap(),
968 state.analysis.unwrap(),
969 state.crate_name.unwrap(),
972 DumpHandler::new(state.out_dir,
973 state.crate_name.unwrap()))
976 control.after_analysis.run_callback_on_error = true;
977 control.make_glob_map = resolve::MakeGlobMap::Yes;
980 impl RustcDefaultCalls {
981 pub fn list_metadata(sess: &Session,
983 matches: &getopts::Matches,
986 let r = matches.opt_strs("Z");
987 if r.iter().any(|s| *s == "ls") {
989 &Input::File(ref ifile) => {
990 let path = &(*ifile);
991 let mut v = Vec::new();
992 locator::list_file_metadata(&sess.target.target,
994 &*cstore.metadata_loader,
997 println!("{}", String::from_utf8(v).unwrap());
999 &Input::Str { .. } => {
1000 early_error(ErrorOutputType::default(), "cannot list metadata for stdin");
1003 return Compilation::Stop;
1006 Compilation::Continue
1010 fn print_crate_info(codegen_backend: &dyn CodegenBackend,
1012 input: Option<&Input>,
1013 odir: &Option<PathBuf>,
1014 ofile: &Option<PathBuf>)
1016 use rustc::session::config::PrintRequest::*;
1017 // PrintRequest::NativeStaticLibs is special - printed during linking
1018 // (empty iterator returns true)
1019 if sess.opts.prints.iter().all(|&p| p == PrintRequest::NativeStaticLibs) {
1020 return Compilation::Continue;
1023 let attrs = match input {
1026 let result = parse_crate_attrs(sess, input);
1028 Ok(attrs) => Some(attrs),
1029 Err(mut parse_error) => {
1031 return Compilation::Stop;
1036 for req in &sess.opts.prints {
1039 let mut targets = rustc_target::spec::get_targets().collect::<Vec<String>>();
1041 println!("{}", targets.join("\n"));
1043 Sysroot => println!("{}", sess.sysroot.display()),
1044 TargetSpec => println!("{}", sess.target.target.to_json().pretty()),
1045 FileNames | CrateName => {
1046 let input = input.unwrap_or_else(||
1047 early_error(ErrorOutputType::default(), "no input file provided"));
1048 let attrs = attrs.as_ref().unwrap();
1049 let t_outputs = driver::build_output_filenames(input, odir, ofile, attrs, sess);
1050 let id = rustc_codegen_utils::link::find_crate_name(Some(sess), attrs, input);
1051 if *req == PrintRequest::CrateName {
1055 let crate_types = driver::collect_crate_types(sess, attrs);
1056 for &style in &crate_types {
1057 let fname = rustc_codegen_utils::link::filename_for_input(
1063 println!("{}", fname.file_name().unwrap().to_string_lossy());
1067 let allow_unstable_cfg = UnstableFeatures::from_environment()
1068 .is_nightly_build();
1070 let mut cfgs = sess.parse_sess.config.iter().filter_map(|&(name, ref value)| {
1071 let gated_cfg = GatedCfg::gate(&ast::MetaItem {
1072 ident: ast::Path::from_ident(ast::Ident::with_empty_ctxt(name)),
1073 node: ast::MetaItemKind::Word,
1077 // Note that crt-static is a specially recognized cfg
1078 // directive that's printed out here as part of
1079 // rust-lang/rust#37406, but in general the
1080 // `target_feature` cfg is gated under
1081 // rust-lang/rust#29717. For now this is just
1082 // specifically allowing the crt-static cfg and that's
1083 // it, this is intended to get into Cargo and then go
1084 // through to build scripts.
1085 let value = value.as_ref().map(|s| s.as_str());
1086 let value = value.as_ref().map(|s| s.as_ref());
1087 if name != "target_feature" || value != Some("crt-static") {
1088 if !allow_unstable_cfg && gated_cfg.is_some() {
1093 if let Some(value) = value {
1094 Some(format!("{}=\"{}\"", name, value))
1096 Some(name.to_string())
1098 }).collect::<Vec<String>>();
1102 println!("{}", cfg);
1105 RelocationModels | CodeModels | TlsModels | TargetCPUs | TargetFeatures => {
1106 codegen_backend.print(*req, sess);
1108 // Any output here interferes with Cargo's parsing of other printed output
1109 PrintRequest::NativeStaticLibs => {}
1112 return Compilation::Stop;
1116 /// Returns a version string such as "0.12.0-dev".
1117 fn release_str() -> Option<&'static str> {
1118 option_env!("CFG_RELEASE")
1121 /// Returns the full SHA1 hash of HEAD of the Git repo from which rustc was built.
1122 fn commit_hash_str() -> Option<&'static str> {
1123 option_env!("CFG_VER_HASH")
1126 /// Returns the "commit date" of HEAD of the Git repo from which rustc was built as a static string.
1127 fn commit_date_str() -> Option<&'static str> {
1128 option_env!("CFG_VER_DATE")
1131 /// Prints version information
1132 pub fn version(binary: &str, matches: &getopts::Matches) {
1133 let verbose = matches.opt_present("verbose");
1135 println!("{} {}", binary, option_env!("CFG_VERSION").unwrap_or("unknown version"));
1138 fn unw(x: Option<&str>) -> &str {
1139 x.unwrap_or("unknown")
1141 println!("binary: {}", binary);
1142 println!("commit-hash: {}", unw(commit_hash_str()));
1143 println!("commit-date: {}", unw(commit_date_str()));
1144 println!("host: {}", config::host_triple());
1145 println!("release: {}", unw(release_str()));
1146 get_codegen_sysroot("llvm")().print_version();
1150 fn usage(verbose: bool, include_unstable_options: bool) {
1151 let groups = if verbose {
1152 config::rustc_optgroups()
1154 config::rustc_short_optgroups()
1156 let mut options = getopts::Options::new();
1157 for option in groups.iter().filter(|x| include_unstable_options || x.is_stable()) {
1158 (option.apply)(&mut options);
1160 let message = "Usage: rustc [OPTIONS] INPUT";
1161 let nightly_help = if nightly_options::is_nightly_build() {
1162 "\n -Z help Print internal options for debugging rustc"
1166 let verbose_help = if verbose {
1169 "\n --help -v Print the full set of options rustc accepts"
1171 println!("{}\nAdditional help:
1172 -C help Print codegen options
1174 Print 'lint' options and default settings{}{}\n",
1175 options.usage(message),
1180 fn print_wall_help() {
1182 The flag `-Wall` does not exist in `rustc`. Most useful lints are enabled by
1183 default. Use `rustc -W help` to see all available lints. It's more common to put
1184 warning settings in the crate root using `#![warn(LINT_NAME)]` instead of using
1185 the command line flag directly.
1189 fn describe_lints(sess: &Session, lint_store: &lint::LintStore, loaded_plugins: bool) {
1191 Available lint options:
1192 -W <foo> Warn about <foo>
1196 -F <foo> Forbid <foo> \
1197 (deny <foo> and all attempts to override)
1201 fn sort_lints(sess: &Session, lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
1202 let mut lints: Vec<_> = lints.into_iter().map(|(x, _)| x).collect();
1203 // The sort doesn't case-fold but it's doubtful we care.
1204 lints.sort_by_cached_key(|x: &&Lint| (x.default_level(sess), x.name));
1208 fn sort_lint_groups(lints: Vec<(&'static str, Vec<lint::LintId>, bool)>)
1209 -> Vec<(&'static str, Vec<lint::LintId>)> {
1210 let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
1211 lints.sort_by_key(|l| l.0);
1215 let (plugin, builtin): (Vec<_>, _) = lint_store.get_lints()
1218 .partition(|&(_, p)| p);
1219 let plugin = sort_lints(sess, plugin);
1220 let builtin = sort_lints(sess, builtin);
1222 let (plugin_groups, builtin_groups): (Vec<_>, _) = lint_store.get_lint_groups()
1225 .partition(|&(.., p)| p);
1226 let plugin_groups = sort_lint_groups(plugin_groups);
1227 let builtin_groups = sort_lint_groups(builtin_groups);
1229 let max_name_len = plugin.iter()
1231 .map(|&s| s.name.chars().count())
1234 let padded = |x: &str| {
1235 let mut s = " ".repeat(max_name_len - x.chars().count());
1240 println!("Lint checks provided by rustc:\n");
1241 println!(" {} {:7.7} {}", padded("name"), "default", "meaning");
1242 println!(" {} {:7.7} {}", padded("----"), "-------", "-------");
1244 let print_lints = |lints: Vec<&Lint>| {
1246 let name = lint.name_lower().replace("_", "-");
1247 println!(" {} {:7.7} {}",
1249 lint.default_level.as_str(),
1255 print_lints(builtin);
1257 let max_name_len = max("warnings".len(),
1258 plugin_groups.iter()
1259 .chain(&builtin_groups)
1260 .map(|&(s, _)| s.chars().count())
1264 let padded = |x: &str| {
1265 let mut s = " ".repeat(max_name_len - x.chars().count());
1270 println!("Lint groups provided by rustc:\n");
1271 println!(" {} {}", padded("name"), "sub-lints");
1272 println!(" {} {}", padded("----"), "---------");
1273 println!(" {} {}", padded("warnings"), "all lints that are set to issue warnings");
1275 let print_lint_groups = |lints: Vec<(&'static str, Vec<lint::LintId>)>| {
1276 for (name, to) in lints {
1277 let name = name.to_lowercase().replace("_", "-");
1278 let desc = to.into_iter()
1279 .map(|x| x.to_string().replace("_", "-"))
1280 .collect::<Vec<String>>()
1282 println!(" {} {}", padded(&name), desc);
1287 print_lint_groups(builtin_groups);
1289 match (loaded_plugins, plugin.len(), plugin_groups.len()) {
1290 (false, 0, _) | (false, _, 0) => {
1291 println!("Compiler plugins can provide additional lints and lint groups. To see a \
1292 listing of these, re-run `rustc -W help` with a crate filename.");
1294 (false, ..) => panic!("didn't load lint plugins but got them anyway!"),
1295 (true, 0, 0) => println!("This crate does not load any lint plugins or lint groups."),
1298 println!("Lint checks provided by plugins loaded by this crate:\n");
1299 print_lints(plugin);
1302 println!("Lint groups provided by plugins loaded by this crate:\n");
1303 print_lint_groups(plugin_groups);
1309 fn describe_debug_flags() {
1310 println!("\nAvailable debug options:\n");
1311 print_flag_list("-Z", config::DB_OPTIONS);
1314 fn describe_codegen_flags() {
1315 println!("\nAvailable codegen options:\n");
1316 print_flag_list("-C", config::CG_OPTIONS);
1319 fn print_flag_list<T>(cmdline_opt: &str,
1320 flag_list: &[(&'static str, T, Option<&'static str>, &'static str)]) {
1321 let max_len = flag_list.iter()
1322 .map(|&(name, _, opt_type_desc, _)| {
1323 let extra_len = match opt_type_desc {
1327 name.chars().count() + extra_len
1332 for &(name, _, opt_type_desc, desc) in flag_list {
1333 let (width, extra) = match opt_type_desc {
1334 Some(..) => (max_len - 4, "=val"),
1335 None => (max_len, ""),
1337 println!(" {} {:>width$}{} -- {}",
1339 name.replace("_", "-"),
1346 /// Process command line options. Emits messages as appropriate. If compilation
1347 /// should continue, returns a getopts::Matches object parsed from args,
1348 /// otherwise returns None.
1350 /// The compiler's handling of options is a little complicated as it ties into
1351 /// our stability story, and it's even *more* complicated by historical
1352 /// accidents. The current intention of each compiler option is to have one of
1355 /// 1. An option is stable and can be used everywhere.
1356 /// 2. An option is unstable, but was historically allowed on the stable
1358 /// 3. An option is unstable, and can only be used on nightly.
1360 /// Like unstable library and language features, however, unstable options have
1361 /// always required a form of "opt in" to indicate that you're using them. This
1362 /// provides the easy ability to scan a code base to check to see if anything
1363 /// unstable is being used. Currently, this "opt in" is the `-Z` "zed" flag.
1365 /// All options behind `-Z` are considered unstable by default. Other top-level
1366 /// options can also be considered unstable, and they were unlocked through the
1367 /// `-Z unstable-options` flag. Note that `-Z` remains to be the root of
1368 /// instability in both cases, though.
1370 /// So with all that in mind, the comments below have some more detail about the
1371 /// contortions done here to get things to work out correctly.
1372 pub fn handle_options(args: &[String]) -> Option<getopts::Matches> {
1373 // Throw away the first argument, the name of the binary
1374 let args = &args[1..];
1376 if args.is_empty() {
1377 // user did not write `-v` nor `-Z unstable-options`, so do not
1378 // include that extra information.
1379 usage(false, false);
1383 // Parse with *all* options defined in the compiler, we don't worry about
1384 // option stability here we just want to parse as much as possible.
1385 let mut options = getopts::Options::new();
1386 for option in config::rustc_optgroups() {
1387 (option.apply)(&mut options);
1389 let matches = options.parse(args).unwrap_or_else(|f|
1390 early_error(ErrorOutputType::default(), &f.to_string()));
1392 // For all options we just parsed, we check a few aspects:
1394 // * If the option is stable, we're all good
1395 // * If the option wasn't passed, we're all good
1396 // * If `-Z unstable-options` wasn't passed (and we're not a -Z option
1397 // ourselves), then we require the `-Z unstable-options` flag to unlock
1398 // this option that was passed.
1399 // * If we're a nightly compiler, then unstable options are now unlocked, so
1400 // we're good to go.
1401 // * Otherwise, if we're a truly unstable option then we generate an error
1402 // (unstable option being used on stable)
1403 // * If we're a historically stable-but-should-be-unstable option then we
1404 // emit a warning that we're going to turn this into an error soon.
1405 nightly_options::check_nightly_options(&matches, &config::rustc_optgroups());
1407 if matches.opt_present("h") || matches.opt_present("help") {
1408 // Only show unstable options in --help if we *really* accept unstable
1409 // options, which catches the case where we got `-Z unstable-options` on
1410 // the stable channel of Rust which was accidentally allowed
1412 usage(matches.opt_present("verbose"),
1413 nightly_options::is_unstable_enabled(&matches));
1417 // Handle the special case of -Wall.
1418 let wall = matches.opt_strs("W");
1419 if wall.iter().any(|x| *x == "all") {
1424 // Don't handle -W help here, because we might first load plugins.
1425 let r = matches.opt_strs("Z");
1426 if r.iter().any(|x| *x == "help") {
1427 describe_debug_flags();
1431 let cg_flags = matches.opt_strs("C");
1433 if cg_flags.iter().any(|x| *x == "help") {
1434 describe_codegen_flags();
1438 if cg_flags.iter().any(|x| *x == "no-stack-check") {
1439 early_warn(ErrorOutputType::default(),
1440 "the --no-stack-check flag is deprecated and does nothing");
1443 if cg_flags.iter().any(|x| *x == "passes=list") {
1444 get_codegen_sysroot("llvm")().print_passes();
1448 if matches.opt_present("version") {
1449 version("rustc", &matches);
1456 fn parse_crate_attrs<'a>(sess: &'a Session, input: &Input) -> PResult<'a, Vec<ast::Attribute>> {
1458 Input::File(ref ifile) => {
1459 parse::parse_crate_attrs_from_file(ifile, &sess.parse_sess)
1461 Input::Str { ref name, ref input } => {
1462 parse::parse_crate_attrs_from_source_str(name.clone(),
1469 // Temporarily have stack size set to 32MB to deal with various crates with long method
1470 // chains or deep syntax trees.
1471 // FIXME(oli-obk): get https://github.com/rust-lang/rust/pull/55617 the finish line
1472 const STACK_SIZE: usize = 32 * 1024 * 1024; // 32MB
1474 /// Runs `f` in a suitable thread for running `rustc`; returns a `Result` with either the return
1475 /// value of `f` or -- if a panic occurs -- the panic value.
1477 /// This version applies the given name to the thread. This is used by rustdoc to ensure consistent
1478 /// doctest output across platforms and executions.
1479 pub fn in_named_rustc_thread<F, R>(name: String, f: F) -> Result<R, Box<dyn Any + Send>>
1480 where F: FnOnce() -> R + Send + 'static,
1483 // We need a thread for soundness of thread local storage in rustc. For debugging purposes
1484 // we allow an escape hatch where everything runs on the main thread.
1485 if env::var_os("RUSTC_UNSTABLE_NO_MAIN_THREAD").is_none() {
1486 let mut cfg = thread::Builder::new().name(name);
1488 // If the env is trying to override the stack size then *don't* set it explicitly.
1489 // The libstd thread impl will fetch the `RUST_MIN_STACK` env var itself.
1490 if env::var_os("RUST_MIN_STACK").is_none() {
1491 cfg = cfg.stack_size(STACK_SIZE);
1494 let thread = cfg.spawn(f);
1495 thread.unwrap().join()
1497 let f = panic::AssertUnwindSafe(f);
1498 panic::catch_unwind(f)
1502 /// Runs `f` in a suitable thread for running `rustc`; returns a
1503 /// `Result` with either the return value of `f` or -- if a panic
1504 /// occurs -- the panic value.
1505 pub fn in_rustc_thread<F, R>(f: F) -> Result<R, Box<dyn Any + Send>>
1506 where F: FnOnce() -> R + Send + 'static,
1509 in_named_rustc_thread("rustc".to_string(), f)
1512 /// Get a list of extra command-line flags provided by the user, as strings.
1514 /// This function is used during ICEs to show more information useful for
1515 /// debugging, since some ICEs only happens with non-default compiler flags
1516 /// (and the users don't always report them).
1517 fn extra_compiler_flags() -> Option<(Vec<String>, bool)> {
1518 let args = env::args_os().map(|arg| arg.to_string_lossy().to_string()).collect::<Vec<_>>();
1520 // Avoid printing help because of empty args. This can suggest the compiler
1521 // itself is not the program root (consider RLS).
1526 let matches = if let Some(matches) = handle_options(&args) {
1532 let mut result = Vec::new();
1533 let mut excluded_cargo_defaults = false;
1534 for flag in ICE_REPORT_COMPILER_FLAGS {
1535 let prefix = if flag.len() == 1 { "-" } else { "--" };
1537 for content in &matches.opt_strs(flag) {
1538 // Split always returns the first element
1539 let name = if let Some(first) = content.split('=').next() {
1545 let content = if ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE.contains(&name) {
1551 if !ICE_REPORT_COMPILER_FLAGS_EXCLUDE.contains(&name) {
1552 result.push(format!("{}{} {}", prefix, flag, content));
1554 excluded_cargo_defaults = true;
1559 if !result.is_empty() {
1560 Some((result, excluded_cargo_defaults))
1567 pub struct CompilationFailure;
1569 impl Error for CompilationFailure {}
1571 impl Display for CompilationFailure {
1572 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
1573 write!(f, "compilation had errors")
1577 /// Run a procedure which will detect panics in the compiler and print nicer
1578 /// error messages rather than just failing the test.
1580 /// The diagnostic emitter yielded to the procedure should be used for reporting
1581 /// errors of the compiler.
1582 pub fn monitor<F: FnOnce() + Send + 'static>(f: F) -> Result<(), CompilationFailure> {
1583 in_rustc_thread(move || {
1585 }).map_err(|value| {
1586 if value.is::<errors::FatalErrorMarker>() {
1589 // Thread panicked without emitting a fatal diagnostic
1593 Box::new(errors::emitter::EmitterWriter::stderr(errors::ColorConfig::Auto,
1597 let handler = errors::Handler::with_emitter(true, false, emitter);
1599 // a .span_bug or .bug call has already printed what
1600 // it wants to print.
1601 if !value.is::<errors::ExplicitBug>() {
1602 handler.emit(&MultiSpan::new(),
1604 errors::Level::Bug);
1607 let mut xs: Vec<Cow<'static, str>> = vec![
1608 "the compiler unexpectedly panicked. this is a bug.".into(),
1609 format!("we would appreciate a bug report: {}", BUG_REPORT_URL).into(),
1610 format!("rustc {} running on {}",
1611 option_env!("CFG_VERSION").unwrap_or("unknown_version"),
1612 config::host_triple()).into(),
1615 if let Some((flags, excluded_cargo_defaults)) = extra_compiler_flags() {
1616 xs.push(format!("compiler flags: {}", flags.join(" ")).into());
1618 if excluded_cargo_defaults {
1619 xs.push("some of the compiler flags provided by cargo are hidden".into());
1624 handler.emit(&MultiSpan::new(),
1626 errors::Level::Note);
1629 panic::resume_unwind(Box::new(errors::FatalErrorMarker));
1634 pub fn diagnostics_registry() -> errors::registry::Registry {
1635 use errors::registry::Registry;
1637 let mut all_errors = Vec::new();
1638 all_errors.extend_from_slice(&rustc::DIAGNOSTICS);
1639 all_errors.extend_from_slice(&rustc_typeck::DIAGNOSTICS);
1640 all_errors.extend_from_slice(&rustc_resolve::DIAGNOSTICS);
1641 all_errors.extend_from_slice(&rustc_privacy::DIAGNOSTICS);
1642 // FIXME: need to figure out a way to get these back in here
1643 // all_errors.extend_from_slice(get_codegen_backend(sess).diagnostics());
1644 all_errors.extend_from_slice(&rustc_metadata::DIAGNOSTICS);
1645 all_errors.extend_from_slice(&rustc_passes::DIAGNOSTICS);
1646 all_errors.extend_from_slice(&rustc_plugin::DIAGNOSTICS);
1647 all_errors.extend_from_slice(&rustc_mir::DIAGNOSTICS);
1648 all_errors.extend_from_slice(&syntax::DIAGNOSTICS);
1650 Registry::new(&all_errors)
1653 /// This allows tools to enable rust logging without having to magically match rustc's
1654 /// log crate version
1655 pub fn init_rustc_env_logger() {
1660 init_rustc_env_logger();
1661 let result = run(|| {
1662 let args = env::args_os().enumerate()
1663 .map(|(i, arg)| arg.into_string().unwrap_or_else(|arg| {
1664 early_error(ErrorOutputType::default(),
1665 &format!("Argument {} is not valid Unicode: {:?}", i, arg))
1667 .collect::<Vec<_>>();
1669 Box::new(RustcDefaultCalls),
1673 process::exit(result as i32);