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 #![deny(bare_trait_objects)]
19 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
20 html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
21 html_root_url = "https://doc.rust-lang.org/nightly/")]
23 #![feature(box_syntax)]
24 #![cfg_attr(unix, feature(libc))]
26 #![feature(rustc_diagnostic_macros)]
27 #![feature(slice_sort_by_cached_key)]
28 #![feature(set_stdio)]
29 #![feature(rustc_stack_internals)]
32 #![recursion_limit="256"]
36 extern crate graphviz;
37 extern crate env_logger;
40 extern crate rustc_rayon as rayon;
42 extern crate rustc_allocator;
43 extern crate rustc_target;
44 extern crate rustc_borrowck;
45 extern crate rustc_data_structures;
46 extern crate rustc_errors as errors;
47 extern crate rustc_passes;
48 extern crate rustc_lint;
49 extern crate rustc_plugin;
50 extern crate rustc_privacy;
51 extern crate rustc_incremental;
52 extern crate rustc_metadata;
53 extern crate rustc_mir;
54 extern crate rustc_resolve;
55 extern crate rustc_save_analysis;
56 extern crate rustc_traits;
57 extern crate rustc_codegen_utils;
58 extern crate rustc_typeck;
59 extern crate scoped_tls;
60 extern crate serialize;
64 extern crate syntax_ext;
65 extern crate syntax_pos;
67 use driver::CompileController;
68 use pretty::{PpMode, UserIdentifiedItem};
70 use rustc_resolve as resolve;
71 use rustc_save_analysis as save;
72 use rustc_save_analysis::DumpHandler;
73 use rustc_data_structures::sync::{self, Lrc};
74 use rustc_data_structures::OnDrop;
75 use rustc::session::{self, config, Session, build_session, CompileResult};
76 use rustc::session::CompileIncomplete;
77 use rustc::session::config::{Input, PrintRequest, ErrorOutputType};
78 use rustc::session::config::nightly_options;
79 use rustc::session::filesearch;
80 use rustc::session::{early_error, early_warn};
81 use rustc::lint::Lint;
83 use rustc::middle::cstore::CrateStore;
84 use rustc_metadata::locator;
85 use rustc_metadata::cstore::CStore;
86 use rustc_metadata::dynamic_lib::DynamicLibrary;
87 use rustc::util::common::{time, ErrorReported};
88 use rustc_codegen_utils::codegen_backend::CodegenBackend;
90 use serialize::json::ToJson;
94 use std::default::Default;
95 use std::env::consts::{DLL_PREFIX, DLL_SUFFIX};
97 use std::ffi::OsString;
98 use std::io::{self, Read, Write};
99 use std::iter::repeat;
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::codemap::{CodeMap, FileLoader, RealFileLoader};
111 use syntax::feature_gate::{GatedCfg, UnstableFeatures};
112 use syntax::parse::{self, PResult};
113 use syntax_pos::{hygiene, DUMMY_SP, MultiSpan, FileName};
121 mod derive_registrar;
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 for feat in codegen_backend.target_features(sess) {
140 cfg.insert((tf, Some(feat)));
143 if sess.crt_static_feature() {
144 cfg.insert((tf, Some(Symbol::intern("crt-static"))));
149 const BUG_REPORT_URL: &'static str = "https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.\
152 const ICE_REPORT_COMPILER_FLAGS: &'static [&'static str] = &[
157 const ICE_REPORT_COMPILER_FLAGS_EXCLUDE: &'static [&'static str] = &[
161 const ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE: &'static [&'static str] = &[
165 pub fn abort_on_err<T>(result: Result<T, CompileIncomplete>, sess: &Session) -> T {
167 Err(CompileIncomplete::Errored(ErrorReported)) => {
168 sess.abort_if_errors();
169 panic!("error reported but abort_if_errors didn't abort???");
171 Err(CompileIncomplete::Stopped) => {
172 sess.fatal("compilation terminated");
178 pub fn run<F>(run_compiler: F) -> isize
179 where F: FnOnce() -> (CompileResult, Option<Session>) + Send + 'static
182 let (result, session) = run_compiler();
183 if let Err(CompileIncomplete::Errored(_)) = result {
186 sess.abort_if_errors();
187 panic!("error reported but abort_if_errors didn't abort???");
191 errors::emitter::EmitterWriter::stderr(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 fn load_backend_from_dylib(path: &Path) -> fn() -> Box<dyn CodegenBackend> {
208 // Note that we're specifically using `open_global_now` here rather than
209 // `open`, namely we want the behavior on Unix of RTLD_GLOBAL and RTLD_NOW,
210 // where NOW means "bind everything right now" because we don't want
211 // surprises later on and RTLD_GLOBAL allows the symbols to be made
212 // available for future dynamic libraries opened. This is currently used by
213 // loading LLVM and then making its symbols available for other dynamic
215 let lib = match DynamicLibrary::open_global_now(path) {
218 let err = format!("couldn't load codegen backend {:?}: {:?}",
221 early_error(ErrorOutputType::default(), &err);
225 match lib.symbol("__rustc_codegen_backend") {
228 mem::transmute::<*mut u8, _>(f)
231 let err = format!("couldn't load codegen backend as it \
232 doesn't export the `__rustc_codegen_backend` \
234 early_error(ErrorOutputType::default(), &err);
240 pub fn get_codegen_backend(sess: &Session) -> Box<dyn CodegenBackend> {
241 static INIT: Once = ONCE_INIT;
245 static mut LOAD: fn() -> Box<dyn CodegenBackend> = || unreachable!();
248 let codegen_name = sess.opts.debugging_opts.codegen_backend.as_ref()
249 .unwrap_or(&sess.target.target.options.codegen_backend);
250 let backend = match &codegen_name[..] {
252 rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::new
254 filename if filename.contains(".") => {
255 load_backend_from_dylib(filename.as_ref())
257 codegen_name => get_codegen_sysroot(codegen_name),
264 let backend = unsafe { LOAD() };
269 fn get_codegen_sysroot(backend_name: &str) -> fn() -> Box<dyn CodegenBackend> {
270 // For now we only allow this function to be called once as it'll dlopen a
271 // few things, which seems to work best if we only do that once. In
272 // general this assertion never trips due to the once guard in `get_codegen_backend`,
273 // but there's a few manual calls to this function in this file we protect
275 static LOADED: AtomicBool = ATOMIC_BOOL_INIT;
276 assert!(!LOADED.fetch_or(true, Ordering::SeqCst),
277 "cannot load the default codegen backend twice");
279 // When we're compiling this library with `--test` it'll run as a binary but
280 // not actually exercise much functionality. As a result most of the logic
281 // here is defunkt (it assumes we're a dynamic library in a sysroot) so
282 // let's just return a dummy creation function which won't be used in
285 return rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::new
288 let target = session::config::host_triple();
289 let mut sysroot_candidates = vec![filesearch::get_or_default_sysroot()];
290 let path = current_dll_path()
291 .and_then(|s| s.canonicalize().ok());
292 if let Some(dll) = path {
293 // use `parent` twice to chop off the file name and then also the
294 // directory containing the dll which should be either `lib` or `bin`.
295 if let Some(path) = dll.parent().and_then(|p| p.parent()) {
296 // The original `path` pointed at the `rustc_driver` crate's dll.
297 // Now that dll should only be in one of two locations. The first is
298 // in the compiler's libdir, for example `$sysroot/lib/*.dll`. The
299 // other is the target's libdir, for example
300 // `$sysroot/lib/rustlib/$target/lib/*.dll`.
302 // We don't know which, so let's assume that if our `path` above
303 // ends in `$target` we *could* be in the target libdir, and always
304 // assume that we may be in the main libdir.
305 sysroot_candidates.push(path.to_owned());
307 if path.ends_with(target) {
308 sysroot_candidates.extend(path.parent() // chop off `$target`
309 .and_then(|p| p.parent()) // chop off `rustlib`
310 .and_then(|p| p.parent()) // chop off `lib`
311 .map(|s| s.to_owned()));
316 let sysroot = sysroot_candidates.iter()
318 let libdir = filesearch::relative_target_lib_path(&sysroot, &target);
320 .with_file_name(option_env!("CFG_CODEGEN_BACKENDS_DIR")
321 .unwrap_or("codegen-backends"))
324 info!("codegen backend candidate: {}", f.display());
328 let sysroot = match sysroot {
331 let candidates = sysroot_candidates.iter()
332 .map(|p| p.display().to_string())
335 let err = format!("failed to find a `codegen-backends` folder \
336 in the sysroot candidates:\n* {}", candidates);
337 early_error(ErrorOutputType::default(), &err);
340 info!("probing {} for a codegen backend", sysroot.display());
342 let d = match sysroot.read_dir() {
345 let err = format!("failed to load default codegen backend, couldn't \
346 read `{}`: {}", sysroot.display(), e);
347 early_error(ErrorOutputType::default(), &err);
351 let mut file: Option<PathBuf> = None;
353 let expected_name = format!("rustc_codegen_llvm-{}", backend_name);
354 for entry in d.filter_map(|e| e.ok()) {
355 let path = entry.path();
356 let filename = match path.file_name().and_then(|s| s.to_str()) {
360 if !(filename.starts_with(DLL_PREFIX) && filename.ends_with(DLL_SUFFIX)) {
363 let name = &filename[DLL_PREFIX.len() .. filename.len() - DLL_SUFFIX.len()];
364 if name != expected_name {
367 if let Some(ref prev) = file {
368 let err = format!("duplicate codegen backends found\n\
371 ", prev.display(), path.display());
372 early_error(ErrorOutputType::default(), &err);
374 file = Some(path.clone());
378 Some(ref s) => return load_backend_from_dylib(s),
380 let err = format!("failed to load default codegen backend for `{}`, \
381 no appropriate codegen dylib found in `{}`",
382 backend_name, sysroot.display());
383 early_error(ErrorOutputType::default(), &err);
388 fn current_dll_path() -> Option<PathBuf> {
389 use std::ffi::{OsStr, CStr};
390 use std::os::unix::prelude::*;
393 let addr = current_dll_path as usize as *mut _;
394 let mut info = mem::zeroed();
395 if libc::dladdr(addr, &mut info) == 0 {
396 info!("dladdr failed");
399 if info.dli_fname.is_null() {
400 info!("dladdr returned null pointer");
403 let bytes = CStr::from_ptr(info.dli_fname).to_bytes();
404 let os = OsStr::from_bytes(bytes);
405 Some(PathBuf::from(os))
410 fn current_dll_path() -> Option<PathBuf> {
411 use std::ffi::OsString;
412 use std::os::windows::prelude::*;
415 fn GetModuleHandleExW(dwFlags: u32,
417 phModule: *mut usize) -> i32;
418 fn GetModuleFileNameW(hModule: usize,
419 lpFilename: *mut u16,
423 const GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS: u32 = 0x00000004;
427 let r = GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
428 current_dll_path as usize,
431 info!("GetModuleHandleExW failed: {}", io::Error::last_os_error());
434 let mut space = Vec::with_capacity(1024);
435 let r = GetModuleFileNameW(module,
437 space.capacity() as u32);
439 info!("GetModuleFileNameW failed: {}", io::Error::last_os_error());
443 if r >= space.capacity() {
444 info!("our buffer was too small? {}",
445 io::Error::last_os_error());
449 let os = OsString::from_wide(&space);
450 Some(PathBuf::from(os))
455 // Parse args and run the compiler. This is the primary entry point for rustc.
456 // See comments on CompilerCalls below for details about the callbacks argument.
457 // The FileLoader provides a way to load files from sources other than the file system.
458 pub fn run_compiler<'a>(args: &[String],
459 callbacks: Box<dyn CompilerCalls<'a> + sync::Send + 'a>,
460 file_loader: Option<Box<dyn FileLoader + Send + Sync + 'static>>,
461 emitter_dest: Option<Box<dyn Write + Send>>)
462 -> (CompileResult, Option<Session>)
464 syntax::with_globals(|| {
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);
471 hygiene::set_default_edition(sopts.edition);
473 driver::spawn_thread_pool(sopts, |sopts| {
474 run_compiler_with_pool(matches, sopts, cfg, callbacks, file_loader, emitter_dest)
479 fn run_compiler_with_pool<'a>(
480 matches: getopts::Matches,
481 sopts: config::Options,
482 cfg: ast::CrateConfig,
483 mut callbacks: Box<dyn CompilerCalls<'a> + sync::Send + 'a>,
484 file_loader: Option<Box<dyn FileLoader + Send + Sync + 'static>>,
485 emitter_dest: Option<Box<dyn Write + Send>>
486 ) -> (CompileResult, Option<Session>) {
487 macro_rules! do_or_return {($expr: expr, $sess: expr) => {
489 Compilation::Stop => return (Ok(()), $sess),
490 Compilation::Continue => {}
494 let descriptions = diagnostics_registry();
496 do_or_return!(callbacks.early_callback(&matches,
503 let (odir, ofile) = make_output(&matches);
504 let (input, input_file_path, input_err) = match make_input(&matches.free) {
505 Some((input, input_file_path, input_err)) => {
506 let (input, input_file_path) = callbacks.some_input(input, input_file_path);
507 (input, input_file_path, input_err)
509 None => match callbacks.no_input(&matches, &sopts, &cfg, &odir, &ofile, &descriptions) {
510 Some((input, input_file_path)) => (input, input_file_path, None),
511 None => return (Ok(()), None),
515 let loader = file_loader.unwrap_or(box RealFileLoader);
516 let codemap = Lrc::new(CodeMap::with_file_loader(loader, sopts.file_path_mapping()));
517 let mut sess = session::build_session_with_codemap(
518 sopts, input_file_path.clone(), descriptions, codemap, emitter_dest,
521 if let Some(err) = input_err {
522 // Immediately stop compilation if there was an issue reading
523 // the input (for example if the input stream is not UTF-8).
524 sess.err(&format!("{}", err));
525 return (Err(CompileIncomplete::Stopped), Some(sess));
528 let codegen_backend = get_codegen_backend(&sess);
530 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
532 let mut cfg = config::build_configuration(&sess, cfg);
533 target_features::add_configuration(&mut cfg, &sess, &*codegen_backend);
534 sess.parse_sess.config = cfg;
537 let plugins = sess.opts.debugging_opts.extra_plugins.clone();
539 let cstore = CStore::new(codegen_backend.metadata_loader());
541 do_or_return!(callbacks.late_callback(&*codegen_backend,
547 &ofile), Some(sess));
549 let _sess_abort_error = OnDrop(|| sess.diagnostic().print_error_count());
551 let control = callbacks.build_controller(&sess, &matches);
553 driver::compile_input(codegen_backend,
568 pub fn set_sigpipe_handler() {
570 // Set the SIGPIPE signal handler, so that an EPIPE
571 // will cause rustc to terminate, as expected.
572 assert!(libc::signal(libc::SIGPIPE, libc::SIG_DFL) != libc::SIG_ERR);
577 pub fn set_sigpipe_handler() {}
579 // Extract output directory and file from matches.
580 fn make_output(matches: &getopts::Matches) -> (Option<PathBuf>, Option<PathBuf>) {
581 let odir = matches.opt_str("out-dir").map(|o| PathBuf::from(&o));
582 let ofile = matches.opt_str("o").map(|o| PathBuf::from(&o));
586 // Extract input (string or file and optional path) from matches.
587 fn make_input(free_matches: &[String]) -> Option<(Input, Option<PathBuf>, Option<io::Error>)> {
588 if free_matches.len() == 1 {
589 let ifile = &free_matches[0];
591 let mut src = String::new();
592 let err = if io::stdin().read_to_string(&mut src).is_err() {
593 Some(io::Error::new(io::ErrorKind::InvalidData,
594 "couldn't read from stdin, as it did not contain valid UTF-8"))
598 Some((Input::Str { name: FileName::Anon, input: src },
601 Some((Input::File(PathBuf::from(ifile)),
602 Some(PathBuf::from(ifile)), None))
609 fn parse_pretty(sess: &Session,
610 matches: &getopts::Matches)
611 -> Option<(PpMode, Option<UserIdentifiedItem>)> {
612 let pretty = if sess.opts.debugging_opts.unstable_options {
613 matches.opt_default("pretty", "normal").map(|a| {
614 // stable pretty-print variants only
615 pretty::parse_pretty(sess, &a, false)
621 if pretty.is_none() {
622 sess.opts.debugging_opts.unpretty.as_ref().map(|a| {
623 // extended with unstable pretty-print variants
624 pretty::parse_pretty(sess, &a, true)
631 // Whether to stop or continue compilation.
632 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
633 pub enum Compilation {
639 pub fn and_then<F: FnOnce() -> Compilation>(self, next: F) -> Compilation {
641 Compilation::Stop => Compilation::Stop,
642 Compilation::Continue => next(),
647 /// A trait for customising the compilation process. Offers a number of hooks for
648 /// executing custom code or customising input.
649 pub trait CompilerCalls<'a> {
650 /// Hook for a callback early in the process of handling arguments. This will
651 /// be called straight after options have been parsed but before anything
652 /// else (e.g., selecting input and output).
653 fn early_callback(&mut self,
654 _: &getopts::Matches,
656 _: &ast::CrateConfig,
657 _: &errors::registry::Registry,
660 Compilation::Continue
663 /// Hook for a callback late in the process of handling arguments. This will
664 /// be called just before actual compilation starts (and before build_controller
665 /// is called), after all arguments etc. have been completely handled.
666 fn late_callback(&mut self,
667 _: &dyn CodegenBackend,
668 _: &getopts::Matches,
675 Compilation::Continue
678 /// Called after we extract the input from the arguments. Gives the implementer
679 /// an opportunity to change the inputs or to add some custom input handling.
680 /// The default behaviour is to simply pass through the inputs.
681 fn some_input(&mut self,
683 input_path: Option<PathBuf>)
684 -> (Input, Option<PathBuf>) {
688 /// Called after we extract the input from the arguments if there is no valid
689 /// input. Gives the implementer an opportunity to supply alternate input (by
690 /// returning a Some value) or to add custom behaviour for this error such as
691 /// emitting error messages. Returning None will cause compilation to stop
693 fn no_input(&mut self,
694 _: &getopts::Matches,
696 _: &ast::CrateConfig,
699 _: &errors::registry::Registry)
700 -> Option<(Input, Option<PathBuf>)> {
704 // Create a CompilController struct for controlling the behaviour of
710 ) -> CompileController<'a>;
713 /// CompilerCalls instance for a regular rustc build.
714 #[derive(Copy, Clone)]
715 pub struct RustcDefaultCalls;
717 // FIXME remove these and use winapi 0.3 instead
718 // Duplicates: bootstrap/compile.rs, librustc_errors/emitter.rs
720 fn stdout_isatty() -> bool {
721 unsafe { libc::isatty(libc::STDOUT_FILENO) != 0 }
725 fn stdout_isatty() -> bool {
728 type HANDLE = *mut u8;
729 type LPDWORD = *mut u32;
730 const STD_OUTPUT_HANDLE: DWORD = -11i32 as DWORD;
732 fn GetStdHandle(which: DWORD) -> HANDLE;
733 fn GetConsoleMode(hConsoleHandle: HANDLE, lpMode: LPDWORD) -> BOOL;
736 let handle = GetStdHandle(STD_OUTPUT_HANDLE);
738 GetConsoleMode(handle, &mut out) != 0
742 fn handle_explain(code: &str,
743 descriptions: &errors::registry::Registry,
744 output: ErrorOutputType) {
745 let normalised = if code.starts_with("E") {
748 format!("E{0:0>4}", code)
750 match descriptions.find_description(&normalised) {
751 Some(ref description) => {
752 let mut is_in_code_block = false;
753 let mut text = String::new();
755 // Slice off the leading newline and print.
756 for line in description[1..].lines() {
757 let indent_level = line.find(|c: char| !c.is_whitespace())
758 .unwrap_or_else(|| line.len());
759 let dedented_line = &line[indent_level..];
760 if dedented_line.starts_with("```") {
761 is_in_code_block = !is_in_code_block;
762 text.push_str(&line[..(indent_level+3)]);
763 } else if is_in_code_block && dedented_line.starts_with("# ") {
772 show_content_with_pager(&text);
778 early_error(output, &format!("no extended information for {}", code));
783 fn show_content_with_pager(content: &String) {
784 let pager_name = env::var_os("PAGER").unwrap_or_else(|| if cfg!(windows) {
785 OsString::from("more.com")
787 OsString::from("less")
790 let mut fallback_to_println = false;
792 match Command::new(pager_name).stdin(Stdio::piped()).spawn() {
794 if let Some(pipe) = pager.stdin.as_mut() {
795 if pipe.write_all(content.as_bytes()).is_err() {
796 fallback_to_println = true;
800 if pager.wait().is_err() {
801 fallback_to_println = true;
805 fallback_to_println = true;
809 // If pager fails for whatever reason, we should still print the content
810 // to standard output
811 if fallback_to_println {
812 print!("{}", content);
816 impl<'a> CompilerCalls<'a> for RustcDefaultCalls {
817 fn early_callback(&mut self,
818 matches: &getopts::Matches,
820 _: &ast::CrateConfig,
821 descriptions: &errors::registry::Registry,
822 output: ErrorOutputType)
824 if let Some(ref code) = matches.opt_str("explain") {
825 handle_explain(code, descriptions, output);
826 return Compilation::Stop;
829 Compilation::Continue
832 fn no_input(&mut self,
833 matches: &getopts::Matches,
834 sopts: &config::Options,
835 cfg: &ast::CrateConfig,
836 odir: &Option<PathBuf>,
837 ofile: &Option<PathBuf>,
838 descriptions: &errors::registry::Registry)
839 -> Option<(Input, Option<PathBuf>)> {
840 match matches.free.len() {
842 let mut sess = build_session(sopts.clone(),
844 descriptions.clone());
845 if sopts.describe_lints {
846 let mut ls = lint::LintStore::new();
847 rustc_lint::register_builtins(&mut ls, Some(&sess));
848 describe_lints(&sess, &ls, false);
851 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
852 let mut cfg = config::build_configuration(&sess, cfg.clone());
853 let codegen_backend = get_codegen_backend(&sess);
854 target_features::add_configuration(&mut cfg, &sess, &*codegen_backend);
855 sess.parse_sess.config = cfg;
856 let should_stop = RustcDefaultCalls::print_crate_info(
864 if should_stop == Compilation::Stop {
867 early_error(sopts.error_format, "no input filename given");
869 1 => panic!("make_input should have provided valid inputs"),
870 _ => early_error(sopts.error_format, "multiple input filenames provided"),
874 fn late_callback(&mut self,
875 codegen_backend: &dyn CodegenBackend,
876 matches: &getopts::Matches,
878 cstore: &dyn CrateStore,
880 odir: &Option<PathBuf>,
881 ofile: &Option<PathBuf>)
883 RustcDefaultCalls::print_crate_info(codegen_backend, sess, Some(input), odir, ofile)
884 .and_then(|| RustcDefaultCalls::list_metadata(sess, cstore, matches, input))
887 fn build_controller(self: Box<Self>,
889 matches: &getopts::Matches)
890 -> CompileController<'a> {
891 let mut control = CompileController::basic();
893 control.keep_ast = sess.opts.debugging_opts.keep_ast;
894 control.continue_parse_after_error = sess.opts.debugging_opts.continue_parse_after_error;
896 if let Some((ppm, opt_uii)) = parse_pretty(sess, matches) {
897 if ppm.needs_ast_map(&opt_uii) {
898 control.after_hir_lowering.stop = Compilation::Stop;
900 control.after_parse.callback = box move |state| {
901 state.krate = Some(pretty::fold_crate(state.session,
902 state.krate.take().unwrap(),
905 control.after_hir_lowering.callback = box move |state| {
906 pretty::print_after_hir_lowering(state.session,
907 state.cstore.unwrap(),
908 state.hir_map.unwrap(),
909 state.analysis.unwrap(),
910 state.resolutions.unwrap(),
912 &state.expanded_crate.take().unwrap(),
913 state.crate_name.unwrap(),
915 state.arenas.unwrap(),
916 state.output_filenames.unwrap(),
921 control.after_parse.stop = Compilation::Stop;
923 control.after_parse.callback = box move |state| {
924 let krate = pretty::fold_crate(state.session, state.krate.take().unwrap(), ppm);
925 pretty::print_after_parsing(state.session,
936 if sess.opts.debugging_opts.parse_only ||
937 sess.opts.debugging_opts.show_span.is_some() ||
938 sess.opts.debugging_opts.ast_json_noexpand {
939 control.after_parse.stop = Compilation::Stop;
942 if sess.opts.debugging_opts.no_analysis ||
943 sess.opts.debugging_opts.ast_json {
944 control.after_hir_lowering.stop = Compilation::Stop;
947 if sess.opts.debugging_opts.save_analysis {
948 enable_save_analysis(&mut control);
951 if sess.print_fuel_crate.is_some() {
952 let old_callback = control.compilation_done.callback;
953 control.compilation_done.callback = box move |state| {
955 let sess = state.session;
956 println!("Fuel used by {}: {}",
957 sess.print_fuel_crate.as_ref().unwrap(),
958 sess.print_fuel.get());
965 pub fn enable_save_analysis(control: &mut CompileController) {
966 control.keep_ast = true;
967 control.after_analysis.callback = box |state| {
968 time(state.session, "save analysis", || {
969 save::process_crate(state.tcx.unwrap(),
970 state.expanded_crate.unwrap(),
971 state.analysis.unwrap(),
972 state.crate_name.unwrap(),
974 DumpHandler::new(state.out_dir,
975 state.crate_name.unwrap()))
978 control.after_analysis.run_callback_on_error = true;
979 control.make_glob_map = resolve::MakeGlobMap::Yes;
982 impl RustcDefaultCalls {
983 pub fn list_metadata(sess: &Session,
984 cstore: &dyn CrateStore,
985 matches: &getopts::Matches,
988 let r = matches.opt_strs("Z");
989 if r.contains(&("ls".to_string())) {
991 &Input::File(ref ifile) => {
992 let path = &(*ifile);
993 let mut v = Vec::new();
994 locator::list_file_metadata(&sess.target.target,
996 cstore.metadata_loader(),
999 println!("{}", String::from_utf8(v).unwrap());
1001 &Input::Str { .. } => {
1002 early_error(ErrorOutputType::default(), "cannot list metadata for stdin");
1005 return Compilation::Stop;
1008 return Compilation::Continue;
1012 fn print_crate_info(codegen_backend: &dyn CodegenBackend,
1014 input: Option<&Input>,
1015 odir: &Option<PathBuf>,
1016 ofile: &Option<PathBuf>)
1018 use rustc::session::config::PrintRequest::*;
1019 // PrintRequest::NativeStaticLibs is special - printed during linking
1020 // (empty iterator returns true)
1021 if sess.opts.prints.iter().all(|&p| p==PrintRequest::NativeStaticLibs) {
1022 return Compilation::Continue;
1025 let attrs = match input {
1028 let result = parse_crate_attrs(sess, input);
1030 Ok(attrs) => Some(attrs),
1031 Err(mut parse_error) => {
1033 return Compilation::Stop;
1038 for req in &sess.opts.prints {
1041 let mut targets = rustc_target::spec::get_targets().collect::<Vec<String>>();
1043 println!("{}", targets.join("\n"));
1045 Sysroot => println!("{}", sess.sysroot().display()),
1046 TargetSpec => println!("{}", sess.target.target.to_json().pretty()),
1047 FileNames | CrateName => {
1048 let input = match input {
1049 Some(input) => input,
1050 None => early_error(ErrorOutputType::default(), "no input file provided"),
1052 let attrs = attrs.as_ref().unwrap();
1053 let t_outputs = driver::build_output_filenames(input, odir, ofile, attrs, sess);
1054 let id = rustc_codegen_utils::link::find_crate_name(Some(sess), attrs, input);
1055 if *req == PrintRequest::CrateName {
1059 let crate_types = driver::collect_crate_types(sess, attrs);
1060 for &style in &crate_types {
1061 let fname = rustc_codegen_utils::link::filename_for_input(
1070 .to_string_lossy());
1074 let allow_unstable_cfg = UnstableFeatures::from_environment()
1075 .is_nightly_build();
1077 let mut cfgs = Vec::new();
1078 for &(name, ref value) in sess.parse_sess.config.iter() {
1079 let gated_cfg = GatedCfg::gate(&ast::MetaItem {
1080 ident: ast::Path::from_ident(ast::Ident::with_empty_ctxt(name)),
1081 node: ast::MetaItemKind::Word,
1085 // Note that crt-static is a specially recognized cfg
1086 // directive that's printed out here as part of
1087 // rust-lang/rust#37406, but in general the
1088 // `target_feature` cfg is gated under
1089 // rust-lang/rust#29717. For now this is just
1090 // specifically allowing the crt-static cfg and that's
1091 // it, this is intended to get into Cargo and then go
1092 // through to build scripts.
1093 let value = value.as_ref().map(|s| s.as_str());
1094 let value = value.as_ref().map(|s| s.as_ref());
1095 if name != "target_feature" || value != Some("crt-static") {
1096 if !allow_unstable_cfg && gated_cfg.is_some() {
1101 cfgs.push(if let Some(value) = value {
1102 format!("{}=\"{}\"", name, value)
1110 println!("{}", cfg);
1113 RelocationModels | CodeModels | TlsModels | TargetCPUs | TargetFeatures => {
1114 codegen_backend.print(*req, sess);
1116 // Any output here interferes with Cargo's parsing of other printed output
1117 PrintRequest::NativeStaticLibs => {}
1120 return Compilation::Stop;
1124 /// Returns a version string such as "0.12.0-dev".
1125 fn release_str() -> Option<&'static str> {
1126 option_env!("CFG_RELEASE")
1129 /// Returns the full SHA1 hash of HEAD of the Git repo from which rustc was built.
1130 fn commit_hash_str() -> Option<&'static str> {
1131 option_env!("CFG_VER_HASH")
1134 /// Returns the "commit date" of HEAD of the Git repo from which rustc was built as a static string.
1135 fn commit_date_str() -> Option<&'static str> {
1136 option_env!("CFG_VER_DATE")
1139 /// Prints version information
1140 pub fn version(binary: &str, matches: &getopts::Matches) {
1141 let verbose = matches.opt_present("verbose");
1145 option_env!("CFG_VERSION").unwrap_or("unknown version"));
1147 fn unw(x: Option<&str>) -> &str {
1148 x.unwrap_or("unknown")
1150 println!("binary: {}", binary);
1151 println!("commit-hash: {}", unw(commit_hash_str()));
1152 println!("commit-date: {}", unw(commit_date_str()));
1153 println!("host: {}", config::host_triple());
1154 println!("release: {}", unw(release_str()));
1155 get_codegen_sysroot("llvm")().print_version();
1159 fn usage(verbose: bool, include_unstable_options: bool) {
1160 let groups = if verbose {
1161 config::rustc_optgroups()
1163 config::rustc_short_optgroups()
1165 let mut options = getopts::Options::new();
1166 for option in groups.iter().filter(|x| include_unstable_options || x.is_stable()) {
1167 (option.apply)(&mut options);
1169 let message = format!("Usage: rustc [OPTIONS] INPUT");
1170 let nightly_help = if nightly_options::is_nightly_build() {
1171 "\n -Z help Print internal options for debugging rustc"
1175 let verbose_help = if verbose {
1178 "\n --help -v Print the full set of options rustc accepts"
1180 println!("{}\nAdditional help:
1181 -C help Print codegen options
1183 Print 'lint' options and default settings{}{}\n",
1184 options.usage(&message),
1189 fn print_wall_help() {
1191 The flag `-Wall` does not exist in `rustc`. Most useful lints are enabled by
1192 default. Use `rustc -W help` to see all available lints. It's more common to put
1193 warning settings in the crate root using `#![warn(LINT_NAME)]` instead of using
1194 the command line flag directly.
1198 fn describe_lints(sess: &Session, lint_store: &lint::LintStore, loaded_plugins: bool) {
1200 Available lint options:
1201 -W <foo> Warn about <foo>
1205 -F <foo> Forbid <foo> \
1206 (deny <foo> and all attempts to override)
1210 fn sort_lints(sess: &Session, lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
1211 let mut lints: Vec<_> = lints.into_iter().map(|(x, _)| x).collect();
1212 // The sort doesn't case-fold but it's doubtful we care.
1213 lints.sort_by_cached_key(|x: &&Lint| (x.default_level(sess), x.name));
1217 fn sort_lint_groups(lints: Vec<(&'static str, Vec<lint::LintId>, bool)>)
1218 -> Vec<(&'static str, Vec<lint::LintId>)> {
1219 let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
1220 lints.sort_by(|&(x, _): &(&'static str, Vec<lint::LintId>),
1221 &(y, _): &(&'static str, Vec<lint::LintId>)| {
1227 let (plugin, builtin): (Vec<_>, _) = lint_store.get_lints()
1230 .partition(|&(_, p)| p);
1231 let plugin = sort_lints(sess, plugin);
1232 let builtin = sort_lints(sess, builtin);
1234 let (plugin_groups, builtin_groups): (Vec<_>, _) = lint_store.get_lint_groups()
1237 .partition(|&(.., p)| p);
1238 let plugin_groups = sort_lint_groups(plugin_groups);
1239 let builtin_groups = sort_lint_groups(builtin_groups);
1241 let max_name_len = plugin.iter()
1243 .map(|&s| s.name.chars().count())
1246 let padded = |x: &str| {
1247 let mut s = repeat(" ")
1248 .take(max_name_len - x.chars().count())
1249 .collect::<String>();
1254 println!("Lint checks provided by rustc:\n");
1255 println!(" {} {:7.7} {}", padded("name"), "default", "meaning");
1256 println!(" {} {:7.7} {}", padded("----"), "-------", "-------");
1258 let print_lints = |lints: Vec<&Lint>| {
1260 let name = lint.name_lower().replace("_", "-");
1261 println!(" {} {:7.7} {}",
1263 lint.default_level.as_str(),
1269 print_lints(builtin);
1273 let max_name_len = max("warnings".len(),
1274 plugin_groups.iter()
1275 .chain(&builtin_groups)
1276 .map(|&(s, _)| s.chars().count())
1280 let padded = |x: &str| {
1281 let mut s = repeat(" ")
1282 .take(max_name_len - x.chars().count())
1283 .collect::<String>();
1288 println!("Lint groups provided by rustc:\n");
1289 println!(" {} {}", padded("name"), "sub-lints");
1290 println!(" {} {}", padded("----"), "---------");
1291 println!(" {} {}", padded("warnings"), "all lints that are set to issue warnings");
1293 let print_lint_groups = |lints: Vec<(&'static str, Vec<lint::LintId>)>| {
1294 for (name, to) in lints {
1295 let name = name.to_lowercase().replace("_", "-");
1296 let desc = to.into_iter()
1297 .map(|x| x.to_string().replace("_", "-"))
1298 .collect::<Vec<String>>()
1300 println!(" {} {}", padded(&name), desc);
1305 print_lint_groups(builtin_groups);
1307 match (loaded_plugins, plugin.len(), plugin_groups.len()) {
1308 (false, 0, _) | (false, _, 0) => {
1309 println!("Compiler plugins can provide additional lints and lint groups. To see a \
1310 listing of these, re-run `rustc -W help` with a crate filename.");
1312 (false, ..) => panic!("didn't load lint plugins but got them anyway!"),
1313 (true, 0, 0) => println!("This crate does not load any lint plugins or lint groups."),
1316 println!("Lint checks provided by plugins loaded by this crate:\n");
1317 print_lints(plugin);
1320 println!("Lint groups provided by plugins loaded by this crate:\n");
1321 print_lint_groups(plugin_groups);
1327 fn describe_debug_flags() {
1328 println!("\nAvailable debug options:\n");
1329 print_flag_list("-Z", config::DB_OPTIONS);
1332 fn describe_codegen_flags() {
1333 println!("\nAvailable codegen options:\n");
1334 print_flag_list("-C", config::CG_OPTIONS);
1337 fn print_flag_list<T>(cmdline_opt: &str,
1338 flag_list: &[(&'static str, T, Option<&'static str>, &'static str)]) {
1339 let max_len = flag_list.iter()
1340 .map(|&(name, _, opt_type_desc, _)| {
1341 let extra_len = match opt_type_desc {
1345 name.chars().count() + extra_len
1350 for &(name, _, opt_type_desc, desc) in flag_list {
1351 let (width, extra) = match opt_type_desc {
1352 Some(..) => (max_len - 4, "=val"),
1353 None => (max_len, ""),
1355 println!(" {} {:>width$}{} -- {}",
1357 name.replace("_", "-"),
1364 /// Process command line options. Emits messages as appropriate. If compilation
1365 /// should continue, returns a getopts::Matches object parsed from args,
1366 /// otherwise returns None.
1368 /// The compiler's handling of options is a little complicated as it ties into
1369 /// our stability story, and it's even *more* complicated by historical
1370 /// accidents. The current intention of each compiler option is to have one of
1373 /// 1. An option is stable and can be used everywhere.
1374 /// 2. An option is unstable, but was historically allowed on the stable
1376 /// 3. An option is unstable, and can only be used on nightly.
1378 /// Like unstable library and language features, however, unstable options have
1379 /// always required a form of "opt in" to indicate that you're using them. This
1380 /// provides the easy ability to scan a code base to check to see if anything
1381 /// unstable is being used. Currently, this "opt in" is the `-Z` "zed" flag.
1383 /// All options behind `-Z` are considered unstable by default. Other top-level
1384 /// options can also be considered unstable, and they were unlocked through the
1385 /// `-Z unstable-options` flag. Note that `-Z` remains to be the root of
1386 /// instability in both cases, though.
1388 /// So with all that in mind, the comments below have some more detail about the
1389 /// contortions done here to get things to work out correctly.
1390 pub fn handle_options(args: &[String]) -> Option<getopts::Matches> {
1391 // Throw away the first argument, the name of the binary
1392 let args = &args[1..];
1394 if args.is_empty() {
1395 // user did not write `-v` nor `-Z unstable-options`, so do not
1396 // include that extra information.
1397 usage(false, false);
1401 // Parse with *all* options defined in the compiler, we don't worry about
1402 // option stability here we just want to parse as much as possible.
1403 let mut options = getopts::Options::new();
1404 for option in config::rustc_optgroups() {
1405 (option.apply)(&mut options);
1407 let matches = match options.parse(args) {
1409 Err(f) => early_error(ErrorOutputType::default(), &f.to_string()),
1412 // For all options we just parsed, we check a few aspects:
1414 // * If the option is stable, we're all good
1415 // * If the option wasn't passed, we're all good
1416 // * If `-Z unstable-options` wasn't passed (and we're not a -Z option
1417 // ourselves), then we require the `-Z unstable-options` flag to unlock
1418 // this option that was passed.
1419 // * If we're a nightly compiler, then unstable options are now unlocked, so
1420 // we're good to go.
1421 // * Otherwise, if we're a truly unstable option then we generate an error
1422 // (unstable option being used on stable)
1423 // * If we're a historically stable-but-should-be-unstable option then we
1424 // emit a warning that we're going to turn this into an error soon.
1425 nightly_options::check_nightly_options(&matches, &config::rustc_optgroups());
1427 if matches.opt_present("h") || matches.opt_present("help") {
1428 // Only show unstable options in --help if we *really* accept unstable
1429 // options, which catches the case where we got `-Z unstable-options` on
1430 // the stable channel of Rust which was accidentally allowed
1432 usage(matches.opt_present("verbose"),
1433 nightly_options::is_unstable_enabled(&matches));
1437 // Handle the special case of -Wall.
1438 let wall = matches.opt_strs("W");
1439 if wall.iter().any(|x| *x == "all") {
1444 // Don't handle -W help here, because we might first load plugins.
1445 let r = matches.opt_strs("Z");
1446 if r.iter().any(|x| *x == "help") {
1447 describe_debug_flags();
1451 let cg_flags = matches.opt_strs("C");
1452 if cg_flags.iter().any(|x| *x == "help") {
1453 describe_codegen_flags();
1457 if cg_flags.iter().any(|x| *x == "no-stack-check") {
1458 early_warn(ErrorOutputType::default(),
1459 "the --no-stack-check flag is deprecated and does nothing");
1462 if cg_flags.contains(&"passes=list".to_string()) {
1463 get_codegen_sysroot("llvm")().print_passes();
1467 if matches.opt_present("version") {
1468 version("rustc", &matches);
1475 fn parse_crate_attrs<'a>(sess: &'a Session, input: &Input) -> PResult<'a, Vec<ast::Attribute>> {
1477 Input::File(ref ifile) => {
1478 parse::parse_crate_attrs_from_file(ifile, &sess.parse_sess)
1480 Input::Str { ref name, ref input } => {
1481 parse::parse_crate_attrs_from_source_str(name.clone(),
1488 /// Runs `f` in a suitable thread for running `rustc`; returns a
1489 /// `Result` with either the return value of `f` or -- if a panic
1490 /// occurs -- the panic value.
1491 pub fn in_rustc_thread<F, R>(f: F) -> Result<R, Box<dyn Any + Send>>
1492 where F: FnOnce() -> R + Send + 'static,
1495 // Temporarily have stack size set to 16MB to deal with nom-using crates failing
1496 const STACK_SIZE: usize = 16 * 1024 * 1024; // 16MB
1498 #[cfg(all(unix,not(target_os = "haiku")))]
1499 let spawn_thread = unsafe {
1500 // Fetch the current resource limits
1501 let mut rlim = libc::rlimit {
1505 if libc::getrlimit(libc::RLIMIT_STACK, &mut rlim) != 0 {
1506 let err = io::Error::last_os_error();
1507 error!("in_rustc_thread: error calling getrlimit: {}", err);
1509 } else if rlim.rlim_max < STACK_SIZE as libc::rlim_t {
1512 std::rt::deinit_stack_guard();
1513 rlim.rlim_cur = STACK_SIZE as libc::rlim_t;
1514 if libc::setrlimit(libc::RLIMIT_STACK, &mut rlim) != 0 {
1515 let err = io::Error::last_os_error();
1516 error!("in_rustc_thread: error calling setrlimit: {}", err);
1517 std::rt::update_stack_guard();
1520 std::rt::update_stack_guard();
1526 // We set the stack size at link time. See src/rustc/rustc.rs.
1528 let spawn_thread = false;
1530 #[cfg(target_os = "haiku")]
1531 let spawn_thread = unsafe {
1532 // Haiku does not have setrlimit implemented for the stack size.
1533 // By default it does have the 16 MB stack limit, but we check this in
1534 // case the minimum STACK_SIZE changes or Haiku's defaults change.
1535 let mut rlim = libc::rlimit {
1539 if libc::getrlimit(libc::RLIMIT_STACK, &mut rlim) != 0 {
1540 let err = io::Error::last_os_error();
1541 error!("in_rustc_thread: error calling getrlimit: {}", err);
1543 } else if rlim.rlim_cur >= STACK_SIZE {
1550 #[cfg(not(any(windows,unix)))]
1551 let spawn_thread = true;
1553 // The or condition is added from backward compatibility.
1554 if spawn_thread || env::var_os("RUST_MIN_STACK").is_some() {
1555 let mut cfg = thread::Builder::new().name("rustc".to_string());
1557 // FIXME: Hacks on hacks. If the env is trying to override the stack size
1558 // then *don't* set it explicitly.
1559 if env::var_os("RUST_MIN_STACK").is_none() {
1560 cfg = cfg.stack_size(STACK_SIZE);
1563 let thread = cfg.spawn(f);
1564 thread.unwrap().join()
1566 let f = panic::AssertUnwindSafe(f);
1567 panic::catch_unwind(f)
1571 /// Get a list of extra command-line flags provided by the user, as strings.
1573 /// This function is used during ICEs to show more information useful for
1574 /// debugging, since some ICEs only happens with non-default compiler flags
1575 /// (and the users don't always report them).
1576 fn extra_compiler_flags() -> Option<(Vec<String>, bool)> {
1577 let mut args = Vec::new();
1578 for arg in env::args_os() {
1579 args.push(arg.to_string_lossy().to_string());
1582 // Avoid printing help because of empty args. This can suggest the compiler
1583 // itself is not the program root (consider RLS).
1588 let matches = if let Some(matches) = handle_options(&args) {
1594 let mut result = Vec::new();
1595 let mut excluded_cargo_defaults = false;
1596 for flag in ICE_REPORT_COMPILER_FLAGS {
1597 let prefix = if flag.len() == 1 { "-" } else { "--" };
1599 for content in &matches.opt_strs(flag) {
1600 // Split always returns the first element
1601 let name = if let Some(first) = content.split('=').next() {
1607 let content = if ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE.contains(&name) {
1613 if !ICE_REPORT_COMPILER_FLAGS_EXCLUDE.contains(&name) {
1614 result.push(format!("{}{} {}", prefix, flag, content));
1616 excluded_cargo_defaults = true;
1621 if result.len() > 0 {
1622 Some((result, excluded_cargo_defaults))
1628 /// Run a procedure which will detect panics in the compiler and print nicer
1629 /// error messages rather than just failing the test.
1631 /// The diagnostic emitter yielded to the procedure should be used for reporting
1632 /// errors of the compiler.
1633 pub fn monitor<F: FnOnce() + Send + 'static>(f: F) {
1634 let result = in_rustc_thread(move || {
1638 if let Err(value) = result {
1639 // Thread panicked without emitting a fatal diagnostic
1640 if !value.is::<errors::FatalErrorMarker>() {
1645 Box::new(errors::emitter::EmitterWriter::stderr(errors::ColorConfig::Auto,
1649 let handler = errors::Handler::with_emitter(true, false, emitter);
1651 // a .span_bug or .bug call has already printed what
1652 // it wants to print.
1653 if !value.is::<errors::ExplicitBug>() {
1654 handler.emit(&MultiSpan::new(),
1656 errors::Level::Bug);
1660 "the compiler unexpectedly panicked. this is a bug.".to_string(),
1661 format!("we would appreciate a bug report: {}", BUG_REPORT_URL),
1662 format!("rustc {} running on {}",
1663 option_env!("CFG_VERSION").unwrap_or("unknown_version"),
1664 config::host_triple()),
1667 if let Some((flags, excluded_cargo_defaults)) = extra_compiler_flags() {
1668 xs.push(format!("compiler flags: {}", flags.join(" ")));
1670 if excluded_cargo_defaults {
1671 xs.push("some of the compiler flags provided by cargo are hidden".to_string());
1676 handler.emit(&MultiSpan::new(),
1678 errors::Level::Note);
1682 panic::resume_unwind(Box::new(errors::FatalErrorMarker));
1686 pub fn diagnostics_registry() -> errors::registry::Registry {
1687 use errors::registry::Registry;
1689 let mut all_errors = Vec::new();
1690 all_errors.extend_from_slice(&rustc::DIAGNOSTICS);
1691 all_errors.extend_from_slice(&rustc_typeck::DIAGNOSTICS);
1692 all_errors.extend_from_slice(&rustc_resolve::DIAGNOSTICS);
1693 all_errors.extend_from_slice(&rustc_privacy::DIAGNOSTICS);
1694 // FIXME: need to figure out a way to get these back in here
1695 // all_errors.extend_from_slice(get_codegen_backend(sess).diagnostics());
1696 all_errors.extend_from_slice(&rustc_codegen_utils::DIAGNOSTICS);
1697 all_errors.extend_from_slice(&rustc_metadata::DIAGNOSTICS);
1698 all_errors.extend_from_slice(&rustc_passes::DIAGNOSTICS);
1699 all_errors.extend_from_slice(&rustc_plugin::DIAGNOSTICS);
1700 all_errors.extend_from_slice(&rustc_mir::DIAGNOSTICS);
1701 all_errors.extend_from_slice(&syntax::DIAGNOSTICS);
1703 Registry::new(&all_errors)
1706 /// This allows tools to enable rust logging without having to magically match rustc's
1707 /// log crate version
1708 pub fn init_rustc_env_logger() {
1713 init_rustc_env_logger();
1714 let result = run(|| {
1715 let args = env::args_os().enumerate()
1716 .map(|(i, arg)| arg.into_string().unwrap_or_else(|arg| {
1717 early_error(ErrorOutputType::default(),
1718 &format!("Argument {} is not valid Unicode: {:?}", i, arg))
1720 .collect::<Vec<_>>();
1722 Box::new(RustcDefaultCalls),
1726 process::exit(result as i32);