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))]
24 #![feature(rustc_diagnostic_macros)]
25 #![feature(slice_sort_by_cached_key)]
26 #![feature(set_stdio)]
27 #![feature(rustc_stack_internals)]
30 #![recursion_limit="256"]
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;
62 extern crate syntax_ext;
63 extern crate syntax_pos;
65 use driver::CompileController;
66 use pretty::{PpMode, UserIdentifiedItem};
68 use rustc_resolve as resolve;
69 use rustc_save_analysis as save;
70 use rustc_save_analysis::DumpHandler;
71 use rustc_data_structures::sync::{self, Lrc};
72 use rustc_data_structures::OnDrop;
73 use rustc::session::{self, config, Session, build_session, CompileResult};
74 use rustc::session::CompileIncomplete;
75 use rustc::session::config::{Input, PrintRequest, ErrorOutputType};
76 use rustc::session::config::nightly_options;
77 use rustc::session::filesearch;
78 use rustc::session::{early_error, early_warn};
79 use rustc::lint::Lint;
81 use rustc::middle::cstore::CrateStore;
82 use rustc_metadata::locator;
83 use rustc_metadata::cstore::CStore;
84 use rustc_metadata::dynamic_lib::DynamicLibrary;
85 use rustc::util::common::{time, ErrorReported};
86 use rustc_codegen_utils::codegen_backend::CodegenBackend;
88 use serialize::json::ToJson;
92 use std::default::Default;
93 use std::env::consts::{DLL_PREFIX, DLL_SUFFIX};
95 use std::ffi::OsString;
96 use std::io::{self, Read, Write};
97 use std::iter::repeat;
100 use std::path::{PathBuf, Path};
101 use std::process::{self, Command, Stdio};
103 use std::sync::atomic::{AtomicBool, ATOMIC_BOOL_INIT, Ordering};
104 use std::sync::{Once, ONCE_INIT};
108 use syntax::codemap::{CodeMap, FileLoader, RealFileLoader};
109 use syntax::feature_gate::{GatedCfg, UnstableFeatures};
110 use syntax::parse::{self, PResult};
111 use syntax_pos::{hygiene, DUMMY_SP, MultiSpan, FileName};
119 mod derive_registrar;
121 pub mod target_features {
123 use syntax::symbol::Symbol;
124 use rustc::session::Session;
125 use rustc_codegen_utils::codegen_backend::CodegenBackend;
127 /// Add `target_feature = "..."` cfgs for a variety of platform
128 /// specific features (SSE, NEON etc.).
130 /// This is performed by checking whether a whitelisted set of
131 /// features is available on the target machine, by querying LLVM.
132 pub fn add_configuration(cfg: &mut ast::CrateConfig,
134 codegen_backend: &CodegenBackend) {
135 let tf = Symbol::intern("target_feature");
137 for feat in codegen_backend.target_features(sess) {
138 cfg.insert((tf, Some(feat)));
141 if sess.crt_static_feature() {
142 cfg.insert((tf, Some(Symbol::intern("crt-static"))));
147 const BUG_REPORT_URL: &'static str = "https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.\
150 const ICE_REPORT_COMPILER_FLAGS: &'static [&'static str] = &[
155 const ICE_REPORT_COMPILER_FLAGS_EXCLUDE: &'static [&'static str] = &[
159 const ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE: &'static [&'static str] = &[
163 pub fn abort_on_err<T>(result: Result<T, CompileIncomplete>, sess: &Session) -> T {
165 Err(CompileIncomplete::Errored(ErrorReported)) => {
166 sess.abort_if_errors();
167 panic!("error reported but abort_if_errors didn't abort???");
169 Err(CompileIncomplete::Stopped) => {
170 sess.fatal("compilation terminated");
176 pub fn run<F>(run_compiler: F) -> isize
177 where F: FnOnce() -> (CompileResult, Option<Session>) + Send + 'static
180 let (result, session) = run_compiler();
181 if let Err(CompileIncomplete::Errored(_)) = result {
184 sess.abort_if_errors();
185 panic!("error reported but abort_if_errors didn't abort???");
189 errors::emitter::EmitterWriter::stderr(errors::ColorConfig::Auto,
193 let handler = errors::Handler::with_emitter(true, false, Box::new(emitter));
194 handler.emit(&MultiSpan::new(),
195 "aborting due to previous error(s)",
196 errors::Level::Fatal);
197 panic::resume_unwind(Box::new(errors::FatalErrorMarker));
205 fn load_backend_from_dylib(path: &Path) -> fn() -> Box<CodegenBackend> {
206 // Note that we're specifically using `open_global_now` here rather than
207 // `open`, namely we want the behavior on Unix of RTLD_GLOBAL and RTLD_NOW,
208 // where NOW means "bind everything right now" because we don't want
209 // surprises later on and RTLD_GLOBAL allows the symbols to be made
210 // available for future dynamic libraries opened. This is currently used by
211 // loading LLVM and then making its symbols available for other dynamic
213 let lib = match DynamicLibrary::open_global_now(path) {
216 let err = format!("couldn't load codegen backend {:?}: {:?}",
219 early_error(ErrorOutputType::default(), &err);
223 match lib.symbol("__rustc_codegen_backend") {
226 mem::transmute::<*mut u8, _>(f)
229 let err = format!("couldn't load codegen backend as it \
230 doesn't export the `__rustc_codegen_backend` \
232 early_error(ErrorOutputType::default(), &err);
238 pub fn get_codegen_backend(sess: &Session) -> Box<CodegenBackend> {
239 static INIT: Once = ONCE_INIT;
243 static mut LOAD: fn() -> Box<CodegenBackend> = || unreachable!();
246 let codegen_name = sess.opts.debugging_opts.codegen_backend.as_ref()
247 .unwrap_or(&sess.target.target.options.codegen_backend);
248 let backend = match &codegen_name[..] {
250 rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::new
252 filename if filename.contains(".") => {
253 load_backend_from_dylib(filename.as_ref())
255 codegen_name => get_codegen_sysroot(codegen_name),
262 let backend = unsafe { LOAD() };
267 fn get_codegen_sysroot(backend_name: &str) -> fn() -> Box<CodegenBackend> {
268 // For now we only allow this function to be called once as it'll dlopen a
269 // few things, which seems to work best if we only do that once. In
270 // general this assertion never trips due to the once guard in `get_codegen_backend`,
271 // but there's a few manual calls to this function in this file we protect
273 static LOADED: AtomicBool = ATOMIC_BOOL_INIT;
274 assert!(!LOADED.fetch_or(true, Ordering::SeqCst),
275 "cannot load the default codegen backend twice");
277 // When we're compiling this library with `--test` it'll run as a binary but
278 // not actually exercise much functionality. As a result most of the logic
279 // here is defunkt (it assumes we're a dynamic library in a sysroot) so
280 // let's just return a dummy creation function which won't be used in
283 return rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::new
286 let target = session::config::host_triple();
287 let mut sysroot_candidates = vec![filesearch::get_or_default_sysroot()];
288 let path = current_dll_path()
289 .and_then(|s| s.canonicalize().ok());
290 if let Some(dll) = path {
291 // use `parent` twice to chop off the file name and then also the
292 // directory containing the dll which should be either `lib` or `bin`.
293 if let Some(path) = dll.parent().and_then(|p| p.parent()) {
294 // The original `path` pointed at the `rustc_driver` crate's dll.
295 // Now that dll should only be in one of two locations. The first is
296 // in the compiler's libdir, for example `$sysroot/lib/*.dll`. The
297 // other is the target's libdir, for example
298 // `$sysroot/lib/rustlib/$target/lib/*.dll`.
300 // We don't know which, so let's assume that if our `path` above
301 // ends in `$target` we *could* be in the target libdir, and always
302 // assume that we may be in the main libdir.
303 sysroot_candidates.push(path.to_owned());
305 if path.ends_with(target) {
306 sysroot_candidates.extend(path.parent() // chop off `$target`
307 .and_then(|p| p.parent()) // chop off `rustlib`
308 .and_then(|p| p.parent()) // chop off `lib`
309 .map(|s| s.to_owned()));
314 let sysroot = sysroot_candidates.iter()
316 let libdir = filesearch::relative_target_lib_path(&sysroot, &target);
318 .with_file_name(option_env!("CFG_CODEGEN_BACKENDS_DIR")
319 .unwrap_or("codegen-backends"))
322 info!("codegen backend candidate: {}", f.display());
326 let sysroot = match sysroot {
329 let candidates = sysroot_candidates.iter()
330 .map(|p| p.display().to_string())
333 let err = format!("failed to find a `codegen-backends` folder \
334 in the sysroot candidates:\n* {}", candidates);
335 early_error(ErrorOutputType::default(), &err);
338 info!("probing {} for a codegen backend", sysroot.display());
340 let d = match sysroot.read_dir() {
343 let err = format!("failed to load default codegen backend, couldn't \
344 read `{}`: {}", sysroot.display(), e);
345 early_error(ErrorOutputType::default(), &err);
349 let mut file: Option<PathBuf> = None;
351 let expected_name = format!("rustc_codegen_llvm-{}", backend_name);
352 for entry in d.filter_map(|e| e.ok()) {
353 let path = entry.path();
354 let filename = match path.file_name().and_then(|s| s.to_str()) {
358 if !(filename.starts_with(DLL_PREFIX) && filename.ends_with(DLL_SUFFIX)) {
361 let name = &filename[DLL_PREFIX.len() .. filename.len() - DLL_SUFFIX.len()];
362 if name != expected_name {
365 if let Some(ref prev) = file {
366 let err = format!("duplicate codegen backends found\n\
369 ", prev.display(), path.display());
370 early_error(ErrorOutputType::default(), &err);
372 file = Some(path.clone());
376 Some(ref s) => return load_backend_from_dylib(s),
378 let err = format!("failed to load default codegen backend for `{}`, \
379 no appropriate codegen dylib found in `{}`",
380 backend_name, sysroot.display());
381 early_error(ErrorOutputType::default(), &err);
386 fn current_dll_path() -> Option<PathBuf> {
387 use std::ffi::{OsStr, CStr};
388 use std::os::unix::prelude::*;
391 let addr = current_dll_path as usize as *mut _;
392 let mut info = mem::zeroed();
393 if libc::dladdr(addr, &mut info) == 0 {
394 info!("dladdr failed");
397 if info.dli_fname.is_null() {
398 info!("dladdr returned null pointer");
401 let bytes = CStr::from_ptr(info.dli_fname).to_bytes();
402 let os = OsStr::from_bytes(bytes);
403 Some(PathBuf::from(os))
408 fn current_dll_path() -> Option<PathBuf> {
409 use std::ffi::OsString;
410 use std::os::windows::prelude::*;
413 fn GetModuleHandleExW(dwFlags: u32,
415 phModule: *mut usize) -> i32;
416 fn GetModuleFileNameW(hModule: usize,
417 lpFilename: *mut u16,
421 const GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS: u32 = 0x00000004;
425 let r = GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
426 current_dll_path as usize,
429 info!("GetModuleHandleExW failed: {}", io::Error::last_os_error());
432 let mut space = Vec::with_capacity(1024);
433 let r = GetModuleFileNameW(module,
435 space.capacity() as u32);
437 info!("GetModuleFileNameW failed: {}", io::Error::last_os_error());
441 if r >= space.capacity() {
442 info!("our buffer was too small? {}",
443 io::Error::last_os_error());
447 let os = OsString::from_wide(&space);
448 Some(PathBuf::from(os))
453 // Parse args and run the compiler. This is the primary entry point for rustc.
454 // See comments on CompilerCalls below for details about the callbacks argument.
455 // The FileLoader provides a way to load files from sources other than the file system.
456 pub fn run_compiler<'a>(args: &[String],
457 callbacks: Box<CompilerCalls<'a> + sync::Send + 'a>,
458 file_loader: Option<Box<FileLoader + Send + Sync + 'static>>,
459 emitter_dest: Option<Box<Write + Send>>)
460 -> (CompileResult, Option<Session>)
462 syntax::with_globals(|| {
463 let matches = match handle_options(args) {
464 Some(matches) => matches,
465 None => return (Ok(()), None),
468 let (sopts, cfg) = config::build_session_options_and_crate_config(&matches);
469 hygiene::set_default_edition(sopts.edition);
471 driver::spawn_thread_pool(sopts, |sopts| {
472 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<CompilerCalls<'a> + sync::Send + 'a>,
482 file_loader: Option<Box<FileLoader + Send + Sync + 'static>>,
483 emitter_dest: Option<Box<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 codemap = Lrc::new(CodeMap::with_file_loader(loader, sopts.file_path_mapping()));
515 let mut sess = session::build_session_with_codemap(
516 sopts, input_file_path.clone(), descriptions, codemap, 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(&format!("{}", err));
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!(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, 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 customising the compilation process. Offers a number of hooks for
646 /// executing custom code or customising 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,
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: &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.arenas.unwrap(),
914 state.output_filenames.unwrap(),
919 control.after_parse.stop = Compilation::Stop;
921 control.after_parse.callback = box move |state| {
922 let krate = pretty::fold_crate(state.session, state.krate.take().unwrap(), ppm);
923 pretty::print_after_parsing(state.session,
934 if sess.opts.debugging_opts.parse_only ||
935 sess.opts.debugging_opts.show_span.is_some() ||
936 sess.opts.debugging_opts.ast_json_noexpand {
937 control.after_parse.stop = Compilation::Stop;
940 if sess.opts.debugging_opts.no_analysis ||
941 sess.opts.debugging_opts.ast_json {
942 control.after_hir_lowering.stop = Compilation::Stop;
945 if sess.opts.debugging_opts.save_analysis {
946 enable_save_analysis(&mut control);
949 if sess.print_fuel_crate.is_some() {
950 let old_callback = control.compilation_done.callback;
951 control.compilation_done.callback = box move |state| {
953 let sess = state.session;
954 println!("Fuel used by {}: {}",
955 sess.print_fuel_crate.as_ref().unwrap(),
956 sess.print_fuel.get());
963 pub fn enable_save_analysis(control: &mut CompileController) {
964 control.keep_ast = true;
965 control.after_analysis.callback = box |state| {
966 time(state.session, "save analysis", || {
967 save::process_crate(state.tcx.unwrap(),
968 state.expanded_crate.unwrap(),
969 state.analysis.unwrap(),
970 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.contains(&("ls".to_string())) {
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 return Compilation::Continue;
1010 fn print_crate_info(codegen_backend: &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 = match input {
1047 Some(input) => input,
1048 None => early_error(ErrorOutputType::default(), "no input file provided"),
1050 let attrs = attrs.as_ref().unwrap();
1051 let t_outputs = driver::build_output_filenames(input, odir, ofile, attrs, sess);
1052 let id = rustc_codegen_utils::link::find_crate_name(Some(sess), attrs, input);
1053 if *req == PrintRequest::CrateName {
1057 let crate_types = driver::collect_crate_types(sess, attrs);
1058 for &style in &crate_types {
1059 let fname = rustc_codegen_utils::link::filename_for_input(
1068 .to_string_lossy());
1072 let allow_unstable_cfg = UnstableFeatures::from_environment()
1073 .is_nightly_build();
1075 let mut cfgs = Vec::new();
1076 for &(name, ref value) in sess.parse_sess.config.iter() {
1077 let gated_cfg = GatedCfg::gate(&ast::MetaItem {
1078 ident: ast::Path::from_ident(ast::Ident::with_empty_ctxt(name)),
1079 node: ast::MetaItemKind::Word,
1083 // Note that crt-static is a specially recognized cfg
1084 // directive that's printed out here as part of
1085 // rust-lang/rust#37406, but in general the
1086 // `target_feature` cfg is gated under
1087 // rust-lang/rust#29717. For now this is just
1088 // specifically allowing the crt-static cfg and that's
1089 // it, this is intended to get into Cargo and then go
1090 // through to build scripts.
1091 let value = value.as_ref().map(|s| s.as_str());
1092 let value = value.as_ref().map(|s| s.as_ref());
1093 if name != "target_feature" || value != Some("crt-static") {
1094 if !allow_unstable_cfg && gated_cfg.is_some() {
1099 cfgs.push(if let Some(value) = value {
1100 format!("{}=\"{}\"", name, value)
1108 println!("{}", cfg);
1111 RelocationModels | CodeModels | TlsModels | TargetCPUs | TargetFeatures => {
1112 codegen_backend.print(*req, sess);
1114 // Any output here interferes with Cargo's parsing of other printed output
1115 PrintRequest::NativeStaticLibs => {}
1118 return Compilation::Stop;
1122 /// Returns a version string such as "0.12.0-dev".
1123 fn release_str() -> Option<&'static str> {
1124 option_env!("CFG_RELEASE")
1127 /// Returns the full SHA1 hash of HEAD of the Git repo from which rustc was built.
1128 fn commit_hash_str() -> Option<&'static str> {
1129 option_env!("CFG_VER_HASH")
1132 /// Returns the "commit date" of HEAD of the Git repo from which rustc was built as a static string.
1133 fn commit_date_str() -> Option<&'static str> {
1134 option_env!("CFG_VER_DATE")
1137 /// Prints version information
1138 pub fn version(binary: &str, matches: &getopts::Matches) {
1139 let verbose = matches.opt_present("verbose");
1143 option_env!("CFG_VERSION").unwrap_or("unknown version"));
1145 fn unw(x: Option<&str>) -> &str {
1146 x.unwrap_or("unknown")
1148 println!("binary: {}", binary);
1149 println!("commit-hash: {}", unw(commit_hash_str()));
1150 println!("commit-date: {}", unw(commit_date_str()));
1151 println!("host: {}", config::host_triple());
1152 println!("release: {}", unw(release_str()));
1153 get_codegen_sysroot("llvm")().print_version();
1157 fn usage(verbose: bool, include_unstable_options: bool) {
1158 let groups = if verbose {
1159 config::rustc_optgroups()
1161 config::rustc_short_optgroups()
1163 let mut options = getopts::Options::new();
1164 for option in groups.iter().filter(|x| include_unstable_options || x.is_stable()) {
1165 (option.apply)(&mut options);
1167 let message = format!("Usage: rustc [OPTIONS] INPUT");
1168 let nightly_help = if nightly_options::is_nightly_build() {
1169 "\n -Z help Print internal options for debugging rustc"
1173 let verbose_help = if verbose {
1176 "\n --help -v Print the full set of options rustc accepts"
1178 println!("{}\nAdditional help:
1179 -C help Print codegen options
1181 Print 'lint' options and default settings{}{}\n",
1182 options.usage(&message),
1187 fn print_wall_help() {
1189 The flag `-Wall` does not exist in `rustc`. Most useful lints are enabled by
1190 default. Use `rustc -W help` to see all available lints. It's more common to put
1191 warning settings in the crate root using `#![warn(LINT_NAME)]` instead of using
1192 the command line flag directly.
1196 fn describe_lints(sess: &Session, lint_store: &lint::LintStore, loaded_plugins: bool) {
1198 Available lint options:
1199 -W <foo> Warn about <foo>
1203 -F <foo> Forbid <foo> \
1204 (deny <foo> and all attempts to override)
1208 fn sort_lints(sess: &Session, lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
1209 let mut lints: Vec<_> = lints.into_iter().map(|(x, _)| x).collect();
1210 // The sort doesn't case-fold but it's doubtful we care.
1211 lints.sort_by_cached_key(|x: &&Lint| (x.default_level(sess), x.name));
1215 fn sort_lint_groups(lints: Vec<(&'static str, Vec<lint::LintId>, bool)>)
1216 -> Vec<(&'static str, Vec<lint::LintId>)> {
1217 let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
1218 lints.sort_by(|&(x, _): &(&'static str, Vec<lint::LintId>),
1219 &(y, _): &(&'static str, Vec<lint::LintId>)| {
1225 let (plugin, builtin): (Vec<_>, _) = lint_store.get_lints()
1228 .partition(|&(_, p)| p);
1229 let plugin = sort_lints(sess, plugin);
1230 let builtin = sort_lints(sess, builtin);
1232 let (plugin_groups, builtin_groups): (Vec<_>, _) = lint_store.get_lint_groups()
1235 .partition(|&(.., p)| p);
1236 let plugin_groups = sort_lint_groups(plugin_groups);
1237 let builtin_groups = sort_lint_groups(builtin_groups);
1239 let max_name_len = plugin.iter()
1241 .map(|&s| s.name.chars().count())
1244 let padded = |x: &str| {
1245 let mut s = repeat(" ")
1246 .take(max_name_len - x.chars().count())
1247 .collect::<String>();
1252 println!("Lint checks provided by rustc:\n");
1253 println!(" {} {:7.7} {}", padded("name"), "default", "meaning");
1254 println!(" {} {:7.7} {}", padded("----"), "-------", "-------");
1256 let print_lints = |lints: Vec<&Lint>| {
1258 let name = lint.name_lower().replace("_", "-");
1259 println!(" {} {:7.7} {}",
1261 lint.default_level.as_str(),
1267 print_lints(builtin);
1271 let max_name_len = max("warnings".len(),
1272 plugin_groups.iter()
1273 .chain(&builtin_groups)
1274 .map(|&(s, _)| s.chars().count())
1278 let padded = |x: &str| {
1279 let mut s = repeat(" ")
1280 .take(max_name_len - x.chars().count())
1281 .collect::<String>();
1286 println!("Lint groups provided by rustc:\n");
1287 println!(" {} {}", padded("name"), "sub-lints");
1288 println!(" {} {}", padded("----"), "---------");
1289 println!(" {} {}", padded("warnings"), "all lints that are set to issue warnings");
1291 let print_lint_groups = |lints: Vec<(&'static str, Vec<lint::LintId>)>| {
1292 for (name, to) in lints {
1293 let name = name.to_lowercase().replace("_", "-");
1294 let desc = to.into_iter()
1295 .map(|x| x.to_string().replace("_", "-"))
1296 .collect::<Vec<String>>()
1298 println!(" {} {}", padded(&name), desc);
1303 print_lint_groups(builtin_groups);
1305 match (loaded_plugins, plugin.len(), plugin_groups.len()) {
1306 (false, 0, _) | (false, _, 0) => {
1307 println!("Compiler plugins can provide additional lints and lint groups. To see a \
1308 listing of these, re-run `rustc -W help` with a crate filename.");
1310 (false, ..) => panic!("didn't load lint plugins but got them anyway!"),
1311 (true, 0, 0) => println!("This crate does not load any lint plugins or lint groups."),
1314 println!("Lint checks provided by plugins loaded by this crate:\n");
1315 print_lints(plugin);
1318 println!("Lint groups provided by plugins loaded by this crate:\n");
1319 print_lint_groups(plugin_groups);
1325 fn describe_debug_flags() {
1326 println!("\nAvailable debug options:\n");
1327 print_flag_list("-Z", config::DB_OPTIONS);
1330 fn describe_codegen_flags() {
1331 println!("\nAvailable codegen options:\n");
1332 print_flag_list("-C", config::CG_OPTIONS);
1335 fn print_flag_list<T>(cmdline_opt: &str,
1336 flag_list: &[(&'static str, T, Option<&'static str>, &'static str)]) {
1337 let max_len = flag_list.iter()
1338 .map(|&(name, _, opt_type_desc, _)| {
1339 let extra_len = match opt_type_desc {
1343 name.chars().count() + extra_len
1348 for &(name, _, opt_type_desc, desc) in flag_list {
1349 let (width, extra) = match opt_type_desc {
1350 Some(..) => (max_len - 4, "=val"),
1351 None => (max_len, ""),
1353 println!(" {} {:>width$}{} -- {}",
1355 name.replace("_", "-"),
1362 /// Process command line options. Emits messages as appropriate. If compilation
1363 /// should continue, returns a getopts::Matches object parsed from args,
1364 /// otherwise returns None.
1366 /// The compiler's handling of options is a little complicated as it ties into
1367 /// our stability story, and it's even *more* complicated by historical
1368 /// accidents. The current intention of each compiler option is to have one of
1371 /// 1. An option is stable and can be used everywhere.
1372 /// 2. An option is unstable, but was historically allowed on the stable
1374 /// 3. An option is unstable, and can only be used on nightly.
1376 /// Like unstable library and language features, however, unstable options have
1377 /// always required a form of "opt in" to indicate that you're using them. This
1378 /// provides the easy ability to scan a code base to check to see if anything
1379 /// unstable is being used. Currently, this "opt in" is the `-Z` "zed" flag.
1381 /// All options behind `-Z` are considered unstable by default. Other top-level
1382 /// options can also be considered unstable, and they were unlocked through the
1383 /// `-Z unstable-options` flag. Note that `-Z` remains to be the root of
1384 /// instability in both cases, though.
1386 /// So with all that in mind, the comments below have some more detail about the
1387 /// contortions done here to get things to work out correctly.
1388 pub fn handle_options(args: &[String]) -> Option<getopts::Matches> {
1389 // Throw away the first argument, the name of the binary
1390 let args = &args[1..];
1392 if args.is_empty() {
1393 // user did not write `-v` nor `-Z unstable-options`, so do not
1394 // include that extra information.
1395 usage(false, false);
1399 // Parse with *all* options defined in the compiler, we don't worry about
1400 // option stability here we just want to parse as much as possible.
1401 let mut options = getopts::Options::new();
1402 for option in config::rustc_optgroups() {
1403 (option.apply)(&mut options);
1405 let matches = match options.parse(args) {
1407 Err(f) => early_error(ErrorOutputType::default(), &f.to_string()),
1410 // For all options we just parsed, we check a few aspects:
1412 // * If the option is stable, we're all good
1413 // * If the option wasn't passed, we're all good
1414 // * If `-Z unstable-options` wasn't passed (and we're not a -Z option
1415 // ourselves), then we require the `-Z unstable-options` flag to unlock
1416 // this option that was passed.
1417 // * If we're a nightly compiler, then unstable options are now unlocked, so
1418 // we're good to go.
1419 // * Otherwise, if we're a truly unstable option then we generate an error
1420 // (unstable option being used on stable)
1421 // * If we're a historically stable-but-should-be-unstable option then we
1422 // emit a warning that we're going to turn this into an error soon.
1423 nightly_options::check_nightly_options(&matches, &config::rustc_optgroups());
1425 if matches.opt_present("h") || matches.opt_present("help") {
1426 // Only show unstable options in --help if we *really* accept unstable
1427 // options, which catches the case where we got `-Z unstable-options` on
1428 // the stable channel of Rust which was accidentally allowed
1430 usage(matches.opt_present("verbose"),
1431 nightly_options::is_unstable_enabled(&matches));
1435 // Handle the special case of -Wall.
1436 let wall = matches.opt_strs("W");
1437 if wall.iter().any(|x| *x == "all") {
1442 // Don't handle -W help here, because we might first load plugins.
1443 let r = matches.opt_strs("Z");
1444 if r.iter().any(|x| *x == "help") {
1445 describe_debug_flags();
1449 let cg_flags = matches.opt_strs("C");
1450 if cg_flags.iter().any(|x| *x == "help") {
1451 describe_codegen_flags();
1455 if cg_flags.iter().any(|x| *x == "no-stack-check") {
1456 early_warn(ErrorOutputType::default(),
1457 "the --no-stack-check flag is deprecated and does nothing");
1460 if cg_flags.contains(&"passes=list".to_string()) {
1461 get_codegen_sysroot("llvm")().print_passes();
1465 if matches.opt_present("version") {
1466 version("rustc", &matches);
1473 fn parse_crate_attrs<'a>(sess: &'a Session, input: &Input) -> PResult<'a, Vec<ast::Attribute>> {
1475 Input::File(ref ifile) => {
1476 parse::parse_crate_attrs_from_file(ifile, &sess.parse_sess)
1478 Input::Str { ref name, ref input } => {
1479 parse::parse_crate_attrs_from_source_str(name.clone(),
1486 /// Runs `f` in a suitable thread for running `rustc`; returns a
1487 /// `Result` with either the return value of `f` or -- if a panic
1488 /// occurs -- the panic value.
1489 pub fn in_rustc_thread<F, R>(f: F) -> Result<R, Box<Any + Send>>
1490 where F: FnOnce() -> R + Send + 'static,
1493 // Temporarily have stack size set to 16MB to deal with nom-using crates failing
1494 const STACK_SIZE: usize = 16 * 1024 * 1024; // 16MB
1496 #[cfg(all(unix,not(target_os = "haiku")))]
1497 let spawn_thread = unsafe {
1498 // Fetch the current resource limits
1499 let mut rlim = libc::rlimit {
1503 if libc::getrlimit(libc::RLIMIT_STACK, &mut rlim) != 0 {
1504 let err = io::Error::last_os_error();
1505 error!("in_rustc_thread: error calling getrlimit: {}", err);
1507 } else if rlim.rlim_max < STACK_SIZE as libc::rlim_t {
1510 std::rt::deinit_stack_guard();
1511 rlim.rlim_cur = STACK_SIZE as libc::rlim_t;
1512 if libc::setrlimit(libc::RLIMIT_STACK, &mut rlim) != 0 {
1513 let err = io::Error::last_os_error();
1514 error!("in_rustc_thread: error calling setrlimit: {}", err);
1515 std::rt::update_stack_guard();
1518 std::rt::update_stack_guard();
1524 // We set the stack size at link time. See src/rustc/rustc.rs.
1526 let spawn_thread = false;
1528 #[cfg(target_os = "haiku")]
1529 let spawn_thread = unsafe {
1530 // Haiku does not have setrlimit implemented for the stack size.
1531 // By default it does have the 16 MB stack limit, but we check this in
1532 // case the minimum STACK_SIZE changes or Haiku's defaults change.
1533 let mut rlim = libc::rlimit {
1537 if libc::getrlimit(libc::RLIMIT_STACK, &mut rlim) != 0 {
1538 let err = io::Error::last_os_error();
1539 error!("in_rustc_thread: error calling getrlimit: {}", err);
1541 } else if rlim.rlim_cur >= STACK_SIZE {
1548 #[cfg(not(any(windows,unix)))]
1549 let spawn_thread = true;
1551 // The or condition is added from backward compatibility.
1552 if spawn_thread || env::var_os("RUST_MIN_STACK").is_some() {
1553 let mut cfg = thread::Builder::new().name("rustc".to_string());
1555 // FIXME: Hacks on hacks. If the env is trying to override the stack size
1556 // then *don't* set it explicitly.
1557 if env::var_os("RUST_MIN_STACK").is_none() {
1558 cfg = cfg.stack_size(STACK_SIZE);
1561 let thread = cfg.spawn(f);
1562 thread.unwrap().join()
1564 let f = panic::AssertUnwindSafe(f);
1565 panic::catch_unwind(f)
1569 /// Get a list of extra command-line flags provided by the user, as strings.
1571 /// This function is used during ICEs to show more information useful for
1572 /// debugging, since some ICEs only happens with non-default compiler flags
1573 /// (and the users don't always report them).
1574 fn extra_compiler_flags() -> Option<(Vec<String>, bool)> {
1575 let mut args = Vec::new();
1576 for arg in env::args_os() {
1577 args.push(arg.to_string_lossy().to_string());
1580 // Avoid printing help because of empty args. This can suggest the compiler
1581 // itself is not the program root (consider RLS).
1586 let matches = if let Some(matches) = handle_options(&args) {
1592 let mut result = Vec::new();
1593 let mut excluded_cargo_defaults = false;
1594 for flag in ICE_REPORT_COMPILER_FLAGS {
1595 let prefix = if flag.len() == 1 { "-" } else { "--" };
1597 for content in &matches.opt_strs(flag) {
1598 // Split always returns the first element
1599 let name = if let Some(first) = content.split('=').next() {
1605 let content = if ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE.contains(&name) {
1611 if !ICE_REPORT_COMPILER_FLAGS_EXCLUDE.contains(&name) {
1612 result.push(format!("{}{} {}", prefix, flag, content));
1614 excluded_cargo_defaults = true;
1619 if result.len() > 0 {
1620 Some((result, excluded_cargo_defaults))
1626 /// Run a procedure which will detect panics in the compiler and print nicer
1627 /// error messages rather than just failing the test.
1629 /// The diagnostic emitter yielded to the procedure should be used for reporting
1630 /// errors of the compiler.
1631 pub fn monitor<F: FnOnce() + Send + 'static>(f: F) {
1632 let result = in_rustc_thread(move || {
1636 if let Err(value) = result {
1637 // Thread panicked without emitting a fatal diagnostic
1638 if !value.is::<errors::FatalErrorMarker>() {
1643 Box::new(errors::emitter::EmitterWriter::stderr(errors::ColorConfig::Auto,
1647 let handler = errors::Handler::with_emitter(true, false, emitter);
1649 // a .span_bug or .bug call has already printed what
1650 // it wants to print.
1651 if !value.is::<errors::ExplicitBug>() {
1652 handler.emit(&MultiSpan::new(),
1654 errors::Level::Bug);
1658 "the compiler unexpectedly panicked. this is a bug.".to_string(),
1659 format!("we would appreciate a bug report: {}", BUG_REPORT_URL),
1660 format!("rustc {} running on {}",
1661 option_env!("CFG_VERSION").unwrap_or("unknown_version"),
1662 config::host_triple()),
1665 if let Some((flags, excluded_cargo_defaults)) = extra_compiler_flags() {
1666 xs.push(format!("compiler flags: {}", flags.join(" ")));
1668 if excluded_cargo_defaults {
1669 xs.push("some of the compiler flags provided by cargo are hidden".to_string());
1674 handler.emit(&MultiSpan::new(),
1676 errors::Level::Note);
1680 panic::resume_unwind(Box::new(errors::FatalErrorMarker));
1684 pub fn diagnostics_registry() -> errors::registry::Registry {
1685 use errors::registry::Registry;
1687 let mut all_errors = Vec::new();
1688 all_errors.extend_from_slice(&rustc::DIAGNOSTICS);
1689 all_errors.extend_from_slice(&rustc_typeck::DIAGNOSTICS);
1690 all_errors.extend_from_slice(&rustc_resolve::DIAGNOSTICS);
1691 all_errors.extend_from_slice(&rustc_privacy::DIAGNOSTICS);
1692 // FIXME: need to figure out a way to get these back in here
1693 // all_errors.extend_from_slice(get_codegen_backend(sess).diagnostics());
1694 all_errors.extend_from_slice(&rustc_codegen_utils::DIAGNOSTICS);
1695 all_errors.extend_from_slice(&rustc_metadata::DIAGNOSTICS);
1696 all_errors.extend_from_slice(&rustc_passes::DIAGNOSTICS);
1697 all_errors.extend_from_slice(&rustc_plugin::DIAGNOSTICS);
1698 all_errors.extend_from_slice(&rustc_mir::DIAGNOSTICS);
1699 all_errors.extend_from_slice(&syntax::DIAGNOSTICS);
1701 Registry::new(&all_errors)
1704 /// This allows tools to enable rust logging without having to magically match rustc's
1705 /// log crate version
1706 pub fn init_rustc_env_logger() {
1711 init_rustc_env_logger();
1712 let result = run(|| {
1713 let args = env::args_os().enumerate()
1714 .map(|(i, arg)| arg.into_string().unwrap_or_else(|arg| {
1715 early_error(ErrorOutputType::default(),
1716 &format!("Argument {} is not valid Unicode: {:?}", i, arg))
1718 .collect::<Vec<_>>();
1720 Box::new(RustcDefaultCalls),
1724 process::exit(result as i32);