5 //! This API is completely unstable and subject to change.
7 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
9 #![feature(box_syntax)]
10 #![cfg_attr(unix, feature(libc))]
12 #![feature(rustc_diagnostic_macros)]
13 #![feature(slice_sort_by_cached_key)]
14 #![feature(set_stdio)]
16 #![feature(integer_atomics)]
18 #![recursion_limit="256"]
21 pub extern crate getopts;
22 extern crate graphviz;
23 extern crate env_logger;
26 extern crate rustc_rayon as rayon;
28 extern crate rustc_allocator;
29 extern crate rustc_target;
30 extern crate rustc_borrowck;
32 extern crate rustc_data_structures;
33 extern crate rustc_errors as errors;
34 extern crate rustc_passes;
35 extern crate rustc_lint;
36 extern crate rustc_plugin;
37 extern crate rustc_privacy;
38 extern crate rustc_incremental;
39 extern crate rustc_metadata;
40 extern crate rustc_mir;
41 extern crate rustc_resolve;
42 extern crate rustc_save_analysis;
43 extern crate rustc_traits;
44 extern crate rustc_codegen_utils;
45 extern crate rustc_typeck;
46 extern crate scoped_tls;
47 extern crate serialize;
48 extern crate smallvec;
52 extern crate syntax_ext;
53 extern crate syntax_pos;
55 use driver::CompileController;
56 use pretty::{PpMode, UserIdentifiedItem};
58 use rustc_save_analysis as save;
59 use rustc_save_analysis::DumpHandler;
60 use rustc_data_structures::sync::{self, Lrc, Ordering::SeqCst};
61 use rustc_data_structures::OnDrop;
62 use rustc::session::{self, config, Session, build_session, CompileResult};
63 use rustc::session::CompileIncomplete;
64 use rustc::session::config::{Input, PrintRequest, ErrorOutputType};
65 use rustc::session::config::nightly_options;
66 use rustc::session::filesearch;
67 use rustc::session::{early_error, early_warn};
68 use rustc::lint::Lint;
70 use rustc_metadata::locator;
71 use rustc_metadata::cstore::CStore;
72 use rustc_metadata::dynamic_lib::DynamicLibrary;
73 use rustc::util::common::{time, ErrorReported};
74 use rustc_codegen_utils::codegen_backend::CodegenBackend;
76 use serialize::json::ToJson;
81 use std::default::Default;
82 use std::env::consts::{DLL_PREFIX, DLL_SUFFIX};
84 use std::error::Error;
85 use std::ffi::OsString;
86 use std::fmt::{self, Display};
87 use std::io::{self, Read, Write};
90 use std::path::{PathBuf, Path};
91 use std::process::{self, Command, Stdio};
93 use std::sync::atomic::{AtomicBool, Ordering};
94 use std::sync::{Once, ONCE_INIT};
98 use syntax::source_map::{SourceMap, FileLoader, RealFileLoader};
99 use syntax::feature_gate::{GatedCfg, UnstableFeatures};
100 use syntax::parse::{self, PResult};
101 use syntax_pos::{DUMMY_SP, MultiSpan, FileName};
109 mod proc_macro_decls;
111 pub mod target_features {
113 use syntax::symbol::Symbol;
114 use rustc::session::Session;
115 use rustc_codegen_utils::codegen_backend::CodegenBackend;
117 /// Add `target_feature = "..."` cfgs for a variety of platform
118 /// specific features (SSE, NEON etc.).
120 /// This is performed by checking whether a whitelisted set of
121 /// features is available on the target machine, by querying LLVM.
122 pub fn add_configuration(cfg: &mut ast::CrateConfig,
124 codegen_backend: &dyn CodegenBackend) {
125 let tf = Symbol::intern("target_feature");
127 cfg.extend(codegen_backend.target_features(sess).into_iter().map(|feat| (tf, Some(feat))));
129 if sess.crt_static_feature() {
130 cfg.insert((tf, Some(Symbol::intern("crt-static"))));
135 /// Exit status code used for successful compilation and help output.
136 pub const EXIT_SUCCESS: isize = 0;
138 /// Exit status code used for compilation failures and invalid flags.
139 pub const EXIT_FAILURE: isize = 1;
141 const BUG_REPORT_URL: &str = "https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.\
144 const ICE_REPORT_COMPILER_FLAGS: &[&str] = &["Z", "C", "crate-type"];
146 const ICE_REPORT_COMPILER_FLAGS_EXCLUDE: &[&str] = &["metadata", "extra-filename"];
148 const ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE: &[&str] = &["incremental"];
150 pub fn abort_on_err<T>(result: Result<T, CompileIncomplete>, sess: &Session) -> T {
152 Err(CompileIncomplete::Errored(ErrorReported)) => {
153 sess.abort_if_errors();
154 panic!("error reported but abort_if_errors didn't abort???");
156 Err(CompileIncomplete::Stopped) => {
157 sess.fatal("compilation terminated");
163 pub fn run<F>(run_compiler: F) -> isize
164 where F: FnOnce() -> (CompileResult, Option<Session>) + Send + 'static
166 let result = monitor(move || {
167 syntax::with_globals(|| {
168 let (result, session) = run_compiler();
169 if let Err(CompileIncomplete::Errored(_)) = result {
172 sess.abort_if_errors();
173 panic!("error reported but abort_if_errors didn't abort???");
177 errors::emitter::EmitterWriter::stderr(
178 errors::ColorConfig::Auto,
183 let handler = errors::Handler::with_emitter(true, false, Box::new(emitter));
184 handler.emit(&MultiSpan::new(),
185 "aborting due to previous error(s)",
186 errors::Level::Fatal);
187 panic::resume_unwind(Box::new(errors::FatalErrorMarker));
195 Ok(()) => EXIT_SUCCESS,
196 Err(_) => EXIT_FAILURE,
200 fn load_backend_from_dylib(path: &Path) -> fn() -> Box<dyn CodegenBackend> {
201 let lib = DynamicLibrary::open(Some(path)).unwrap_or_else(|err| {
202 let err = format!("couldn't load codegen backend {:?}: {:?}", path, err);
203 early_error(ErrorOutputType::default(), &err);
206 match lib.symbol("__rustc_codegen_backend") {
209 mem::transmute::<*mut u8, _>(f)
212 let err = format!("couldn't load codegen backend as it \
213 doesn't export the `__rustc_codegen_backend` \
215 early_error(ErrorOutputType::default(), &err);
221 pub fn get_codegen_backend(sess: &Session) -> Box<dyn CodegenBackend> {
222 static INIT: Once = ONCE_INIT;
226 static mut LOAD: fn() -> Box<dyn CodegenBackend> = || unreachable!();
229 let codegen_name = sess.opts.debugging_opts.codegen_backend.as_ref()
230 .unwrap_or(&sess.target.target.options.codegen_backend);
231 let backend = match &codegen_name[..] {
233 rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::boxed
235 filename if filename.contains(".") => {
236 load_backend_from_dylib(filename.as_ref())
238 codegen_name => get_codegen_sysroot(codegen_name),
245 let backend = unsafe { LOAD() };
250 fn get_codegen_sysroot(backend_name: &str) -> fn() -> Box<dyn CodegenBackend> {
251 // For now we only allow this function to be called once as it'll dlopen a
252 // few things, which seems to work best if we only do that once. In
253 // general this assertion never trips due to the once guard in `get_codegen_backend`,
254 // but there's a few manual calls to this function in this file we protect
256 static LOADED: AtomicBool = AtomicBool::new(false);
257 assert!(!LOADED.fetch_or(true, Ordering::SeqCst),
258 "cannot load the default codegen backend twice");
260 // When we're compiling this library with `--test` it'll run as a binary but
261 // not actually exercise much functionality. As a result most of the logic
262 // here is defunkt (it assumes we're a dynamic library in a sysroot) so
263 // let's just return a dummy creation function which won't be used in
266 return rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::boxed
269 let target = session::config::host_triple();
270 let mut sysroot_candidates = vec![filesearch::get_or_default_sysroot()];
271 let path = current_dll_path()
272 .and_then(|s| s.canonicalize().ok());
273 if let Some(dll) = path {
274 // use `parent` twice to chop off the file name and then also the
275 // directory containing the dll which should be either `lib` or `bin`.
276 if let Some(path) = dll.parent().and_then(|p| p.parent()) {
277 // The original `path` pointed at the `rustc_driver` crate's dll.
278 // Now that dll should only be in one of two locations. The first is
279 // in the compiler's libdir, for example `$sysroot/lib/*.dll`. The
280 // other is the target's libdir, for example
281 // `$sysroot/lib/rustlib/$target/lib/*.dll`.
283 // We don't know which, so let's assume that if our `path` above
284 // ends in `$target` we *could* be in the target libdir, and always
285 // assume that we may be in the main libdir.
286 sysroot_candidates.push(path.to_owned());
288 if path.ends_with(target) {
289 sysroot_candidates.extend(path.parent() // chop off `$target`
290 .and_then(|p| p.parent()) // chop off `rustlib`
291 .and_then(|p| p.parent()) // chop off `lib`
292 .map(|s| s.to_owned()));
297 let sysroot = sysroot_candidates.iter()
299 let libdir = filesearch::relative_target_lib_path(&sysroot, &target);
300 sysroot.join(libdir).with_file_name(
301 option_env!("CFG_CODEGEN_BACKENDS_DIR").unwrap_or("codegen-backends"))
304 info!("codegen backend candidate: {}", f.display());
308 let sysroot = sysroot.unwrap_or_else(|| {
309 let candidates = sysroot_candidates.iter()
310 .map(|p| p.display().to_string())
313 let err = format!("failed to find a `codegen-backends` folder \
314 in the sysroot candidates:\n* {}", candidates);
315 early_error(ErrorOutputType::default(), &err);
317 info!("probing {} for a codegen backend", sysroot.display());
319 let d = sysroot.read_dir().unwrap_or_else(|e| {
320 let err = format!("failed to load default codegen backend, couldn't \
321 read `{}`: {}", sysroot.display(), e);
322 early_error(ErrorOutputType::default(), &err);
325 let mut file: Option<PathBuf> = None;
327 let expected_name = format!("rustc_codegen_llvm-{}", backend_name);
328 for entry in d.filter_map(|e| e.ok()) {
329 let path = entry.path();
330 let filename = match path.file_name().and_then(|s| s.to_str()) {
334 if !(filename.starts_with(DLL_PREFIX) && filename.ends_with(DLL_SUFFIX)) {
337 let name = &filename[DLL_PREFIX.len() .. filename.len() - DLL_SUFFIX.len()];
338 if name != expected_name {
341 if let Some(ref prev) = file {
342 let err = format!("duplicate codegen backends found\n\
345 ", prev.display(), path.display());
346 early_error(ErrorOutputType::default(), &err);
348 file = Some(path.clone());
352 Some(ref s) => return load_backend_from_dylib(s),
354 let err = format!("failed to load default codegen backend for `{}`, \
355 no appropriate codegen dylib found in `{}`",
356 backend_name, sysroot.display());
357 early_error(ErrorOutputType::default(), &err);
362 fn current_dll_path() -> Option<PathBuf> {
363 use std::ffi::{OsStr, CStr};
364 use std::os::unix::prelude::*;
367 let addr = current_dll_path as usize as *mut _;
368 let mut info = mem::zeroed();
369 if libc::dladdr(addr, &mut info) == 0 {
370 info!("dladdr failed");
373 if info.dli_fname.is_null() {
374 info!("dladdr returned null pointer");
377 let bytes = CStr::from_ptr(info.dli_fname).to_bytes();
378 let os = OsStr::from_bytes(bytes);
379 Some(PathBuf::from(os))
384 fn current_dll_path() -> Option<PathBuf> {
385 use std::ffi::OsString;
386 use std::os::windows::prelude::*;
389 fn GetModuleHandleExW(dwFlags: u32,
391 phModule: *mut usize) -> i32;
392 fn GetModuleFileNameW(hModule: usize,
393 lpFilename: *mut u16,
397 const GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS: u32 = 0x00000004;
401 let r = GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
402 current_dll_path as usize,
405 info!("GetModuleHandleExW failed: {}", io::Error::last_os_error());
408 let mut space = Vec::with_capacity(1024);
409 let r = GetModuleFileNameW(module,
411 space.capacity() as u32);
413 info!("GetModuleFileNameW failed: {}", io::Error::last_os_error());
417 if r >= space.capacity() {
418 info!("our buffer was too small? {}",
419 io::Error::last_os_error());
423 let os = OsString::from_wide(&space);
424 Some(PathBuf::from(os))
429 // Parse args and run the compiler. This is the primary entry point for rustc.
430 // See comments on CompilerCalls below for details about the callbacks argument.
431 // The FileLoader provides a way to load files from sources other than the file system.
432 pub fn run_compiler<'a>(args: &[String],
433 callbacks: Box<dyn CompilerCalls<'a> + sync::Send + 'a>,
434 file_loader: Option<Box<dyn FileLoader + Send + Sync + 'static>>,
435 emitter_dest: Option<Box<dyn Write + Send>>)
436 -> (CompileResult, Option<Session>)
438 let matches = match handle_options(args) {
439 Some(matches) => matches,
440 None => return (Ok(()), None),
443 let (sopts, cfg) = config::build_session_options_and_crate_config(&matches);
445 driver::spawn_thread_pool(sopts, |sopts| {
446 run_compiler_with_pool(matches, sopts, cfg, callbacks, file_loader, emitter_dest)
450 fn run_compiler_with_pool<'a>(
451 matches: getopts::Matches,
452 sopts: config::Options,
453 cfg: ast::CrateConfig,
454 mut callbacks: Box<dyn CompilerCalls<'a> + sync::Send + 'a>,
455 file_loader: Option<Box<dyn FileLoader + Send + Sync + 'static>>,
456 emitter_dest: Option<Box<dyn Write + Send>>
457 ) -> (CompileResult, Option<Session>) {
458 macro_rules! do_or_return {($expr: expr, $sess: expr) => {
460 Compilation::Stop => return (Ok(()), $sess),
461 Compilation::Continue => {}
465 let descriptions = diagnostics_registry();
467 do_or_return!(callbacks.early_callback(&matches,
474 let (odir, ofile) = make_output(&matches);
475 let (input, input_file_path, input_err) = match make_input(&matches.free) {
476 Some((input, input_file_path, input_err)) => {
477 let (input, input_file_path) = callbacks.some_input(input, input_file_path);
478 (input, input_file_path, input_err)
480 None => match callbacks.no_input(&matches, &sopts, &cfg, &odir, &ofile, &descriptions) {
481 Some((input, input_file_path)) => (input, input_file_path, None),
482 None => return (Ok(()), None),
486 let loader = file_loader.unwrap_or(box RealFileLoader);
487 let source_map = Lrc::new(SourceMap::with_file_loader(loader, sopts.file_path_mapping()));
488 let mut sess = session::build_session_with_source_map(
489 sopts, input_file_path.clone(), descriptions, source_map, emitter_dest,
492 if let Some(err) = input_err {
493 // Immediately stop compilation if there was an issue reading
494 // the input (for example if the input stream is not UTF-8).
495 sess.err(&err.to_string());
496 return (Err(CompileIncomplete::Stopped), Some(sess));
499 let codegen_backend = get_codegen_backend(&sess);
501 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
503 let mut cfg = config::build_configuration(&sess, cfg);
504 target_features::add_configuration(&mut cfg, &sess, &*codegen_backend);
505 sess.parse_sess.config = cfg;
508 let plugins = sess.opts.debugging_opts.extra_plugins.clone();
510 let cstore = CStore::new(codegen_backend.metadata_loader());
512 do_or_return!(callbacks.late_callback(&*codegen_backend,
518 &ofile), Some(sess));
520 let _sess_abort_error = OnDrop(|| sess.diagnostic().print_error_count());
522 let control = callbacks.build_controller(&sess, &matches);
524 driver::compile_input(codegen_backend,
539 pub fn set_sigpipe_handler() {
541 // Set the SIGPIPE signal handler, so that an EPIPE
542 // will cause rustc to terminate, as expected.
543 assert_ne!(libc::signal(libc::SIGPIPE, libc::SIG_DFL), libc::SIG_ERR);
548 pub fn set_sigpipe_handler() {}
550 // Extract output directory and file from matches.
551 fn make_output(matches: &getopts::Matches) -> (Option<PathBuf>, Option<PathBuf>) {
552 let odir = matches.opt_str("out-dir").map(|o| PathBuf::from(&o));
553 let ofile = matches.opt_str("o").map(|o| PathBuf::from(&o));
557 // Extract input (string or file and optional path) from matches.
558 fn make_input(free_matches: &[String]) -> Option<(Input, Option<PathBuf>, Option<io::Error>)> {
559 if free_matches.len() == 1 {
560 let ifile = &free_matches[0];
562 let mut src = String::new();
563 let err = if io::stdin().read_to_string(&mut src).is_err() {
564 Some(io::Error::new(io::ErrorKind::InvalidData,
565 "couldn't read from stdin, as it did not contain valid UTF-8"))
569 Some((Input::Str { name: FileName::anon_source_code(&src), input: src },
572 Some((Input::File(PathBuf::from(ifile)),
573 Some(PathBuf::from(ifile)), None))
580 fn parse_pretty(sess: &Session,
581 matches: &getopts::Matches)
582 -> Option<(PpMode, Option<UserIdentifiedItem>)> {
583 let pretty = if sess.opts.debugging_opts.unstable_options {
584 matches.opt_default("pretty", "normal").map(|a| {
585 // stable pretty-print variants only
586 pretty::parse_pretty(sess, &a, false)
592 if pretty.is_none() {
593 sess.opts.debugging_opts.unpretty.as_ref().map(|a| {
594 // extended with unstable pretty-print variants
595 pretty::parse_pretty(sess, &a, true)
602 // Whether to stop or continue compilation.
603 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
604 pub enum Compilation {
610 pub fn and_then<F: FnOnce() -> Compilation>(self, next: F) -> Compilation {
612 Compilation::Stop => Compilation::Stop,
613 Compilation::Continue => next(),
618 /// A trait for customizing the compilation process. Offers a number of hooks for
619 /// executing custom code or customizing input.
620 pub trait CompilerCalls<'a> {
621 /// Hook for a callback early in the process of handling arguments. This will
622 /// be called straight after options have been parsed but before anything
623 /// else (e.g., selecting input and output).
624 fn early_callback(&mut self,
625 _: &getopts::Matches,
627 _: &ast::CrateConfig,
628 _: &errors::registry::Registry,
631 Compilation::Continue
634 /// Hook for a callback late in the process of handling arguments. This will
635 /// be called just before actual compilation starts (and before build_controller
636 /// is called), after all arguments etc. have been completely handled.
637 fn late_callback(&mut self,
638 _: &dyn CodegenBackend,
639 _: &getopts::Matches,
646 Compilation::Continue
649 /// Called after we extract the input from the arguments. Gives the implementer
650 /// an opportunity to change the inputs or to add some custom input handling.
651 /// The default behaviour is to simply pass through the inputs.
652 fn some_input(&mut self,
654 input_path: Option<PathBuf>)
655 -> (Input, Option<PathBuf>) {
659 /// Called after we extract the input from the arguments if there is no valid
660 /// input. Gives the implementer an opportunity to supply alternate input (by
661 /// returning a Some value) or to add custom behaviour for this error such as
662 /// emitting error messages. Returning None will cause compilation to stop
664 fn no_input(&mut self,
665 _: &getopts::Matches,
667 _: &ast::CrateConfig,
670 _: &errors::registry::Registry)
671 -> Option<(Input, Option<PathBuf>)> {
675 // Create a CompilController struct for controlling the behaviour of
681 ) -> CompileController<'a>;
684 /// CompilerCalls instance for a regular rustc build.
685 #[derive(Copy, Clone)]
686 pub struct RustcDefaultCalls;
688 // FIXME remove these and use winapi 0.3 instead
689 // Duplicates: bootstrap/compile.rs, librustc_errors/emitter.rs
691 fn stdout_isatty() -> bool {
692 unsafe { libc::isatty(libc::STDOUT_FILENO) != 0 }
696 fn stdout_isatty() -> bool {
699 type HANDLE = *mut u8;
700 type LPDWORD = *mut u32;
701 const STD_OUTPUT_HANDLE: DWORD = -11i32 as DWORD;
703 fn GetStdHandle(which: DWORD) -> HANDLE;
704 fn GetConsoleMode(hConsoleHandle: HANDLE, lpMode: LPDWORD) -> BOOL;
707 let handle = GetStdHandle(STD_OUTPUT_HANDLE);
709 GetConsoleMode(handle, &mut out) != 0
713 fn handle_explain(code: &str,
714 descriptions: &errors::registry::Registry,
715 output: ErrorOutputType) {
716 let normalised = if code.starts_with("E") {
719 format!("E{0:0>4}", code)
721 match descriptions.find_description(&normalised) {
722 Some(ref description) => {
723 let mut is_in_code_block = false;
724 let mut text = String::new();
726 // Slice off the leading newline and print.
727 for line in description[1..].lines() {
728 let indent_level = line.find(|c: char| !c.is_whitespace())
729 .unwrap_or_else(|| line.len());
730 let dedented_line = &line[indent_level..];
731 if dedented_line.starts_with("```") {
732 is_in_code_block = !is_in_code_block;
733 text.push_str(&line[..(indent_level+3)]);
734 } else if is_in_code_block && dedented_line.starts_with("# ") {
743 show_content_with_pager(&text);
749 early_error(output, &format!("no extended information for {}", code));
754 fn show_content_with_pager(content: &String) {
755 let pager_name = env::var_os("PAGER").unwrap_or_else(|| if cfg!(windows) {
756 OsString::from("more.com")
758 OsString::from("less")
761 let mut fallback_to_println = false;
763 match Command::new(pager_name).stdin(Stdio::piped()).spawn() {
765 if let Some(pipe) = pager.stdin.as_mut() {
766 if pipe.write_all(content.as_bytes()).is_err() {
767 fallback_to_println = true;
771 if pager.wait().is_err() {
772 fallback_to_println = true;
776 fallback_to_println = true;
780 // If pager fails for whatever reason, we should still print the content
781 // to standard output
782 if fallback_to_println {
783 print!("{}", content);
787 impl<'a> CompilerCalls<'a> for RustcDefaultCalls {
788 fn early_callback(&mut self,
789 matches: &getopts::Matches,
791 _: &ast::CrateConfig,
792 descriptions: &errors::registry::Registry,
793 output: ErrorOutputType)
795 if let Some(ref code) = matches.opt_str("explain") {
796 handle_explain(code, descriptions, output);
797 return Compilation::Stop;
800 Compilation::Continue
803 fn no_input(&mut self,
804 matches: &getopts::Matches,
805 sopts: &config::Options,
806 cfg: &ast::CrateConfig,
807 odir: &Option<PathBuf>,
808 ofile: &Option<PathBuf>,
809 descriptions: &errors::registry::Registry)
810 -> Option<(Input, Option<PathBuf>)> {
811 match matches.free.len() {
813 let mut sess = build_session(sopts.clone(),
815 descriptions.clone());
816 if sopts.describe_lints {
817 let mut ls = lint::LintStore::new();
818 rustc_lint::register_builtins(&mut ls, Some(&sess));
819 describe_lints(&sess, &ls, false);
822 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
823 let mut cfg = config::build_configuration(&sess, cfg.clone());
824 let codegen_backend = get_codegen_backend(&sess);
825 target_features::add_configuration(&mut cfg, &sess, &*codegen_backend);
826 sess.parse_sess.config = cfg;
827 let should_stop = RustcDefaultCalls::print_crate_info(
835 if should_stop == Compilation::Stop {
838 early_error(sopts.error_format, "no input filename given");
840 1 => panic!("make_input should have provided valid inputs"),
845 "multiple input filenames provided (first two filenames are `{}` and `{}`)",
853 fn late_callback(&mut self,
854 codegen_backend: &dyn CodegenBackend,
855 matches: &getopts::Matches,
859 odir: &Option<PathBuf>,
860 ofile: &Option<PathBuf>)
862 RustcDefaultCalls::print_crate_info(codegen_backend, sess, Some(input), odir, ofile)
863 .and_then(|| RustcDefaultCalls::list_metadata(sess, cstore, matches, input))
866 fn build_controller(self: Box<Self>,
868 matches: &getopts::Matches)
869 -> CompileController<'a> {
870 let mut control = CompileController::basic();
872 control.keep_ast = sess.opts.debugging_opts.keep_ast;
873 control.continue_parse_after_error = sess.opts.debugging_opts.continue_parse_after_error;
875 if let Some((ppm, opt_uii)) = parse_pretty(sess, matches) {
876 if ppm.needs_ast_map(&opt_uii) {
877 control.after_hir_lowering.stop = Compilation::Stop;
879 control.after_parse.callback = box move |state| {
880 let mut krate = state.krate.take().unwrap();
881 pretty::visit_crate(state.session, &mut krate, ppm);
882 state.krate = Some(krate);
884 control.after_hir_lowering.callback = box move |state| {
885 pretty::print_after_hir_lowering(state.session,
886 state.cstore.unwrap(),
887 state.hir_map.unwrap(),
888 state.resolutions.unwrap(),
890 &state.expanded_crate.take().unwrap(),
891 state.crate_name.unwrap(),
893 state.output_filenames.unwrap(),
898 control.after_parse.stop = Compilation::Stop;
900 control.after_parse.callback = box move |state| {
901 let mut krate = state.krate.take().unwrap();
902 pretty::visit_crate(state.session, &mut krate, ppm);
903 pretty::print_after_parsing(state.session,
914 if sess.opts.debugging_opts.parse_only ||
915 sess.opts.debugging_opts.show_span.is_some() ||
916 sess.opts.debugging_opts.ast_json_noexpand {
917 control.after_parse.stop = Compilation::Stop;
920 if sess.opts.debugging_opts.no_analysis ||
921 sess.opts.debugging_opts.ast_json {
922 control.after_hir_lowering.stop = Compilation::Stop;
925 if sess.opts.debugging_opts.save_analysis {
926 enable_save_analysis(&mut control);
929 if sess.print_fuel_crate.is_some() {
930 let old_callback = control.compilation_done.callback;
931 control.compilation_done.callback = box move |state| {
933 let sess = state.session;
934 eprintln!("Fuel used by {}: {}",
935 sess.print_fuel_crate.as_ref().unwrap(),
936 sess.print_fuel.load(SeqCst));
943 pub fn enable_save_analysis(control: &mut CompileController) {
944 control.keep_ast = true;
945 control.after_analysis.callback = box |state| {
946 time(state.session, "save analysis", || {
947 save::process_crate(state.tcx.unwrap(),
948 state.expanded_crate.unwrap(),
949 state.crate_name.unwrap(),
952 DumpHandler::new(state.out_dir,
953 state.crate_name.unwrap()))
956 control.after_analysis.run_callback_on_error = true;
959 impl RustcDefaultCalls {
960 pub fn list_metadata(sess: &Session,
962 matches: &getopts::Matches,
965 let r = matches.opt_strs("Z");
966 if r.iter().any(|s| *s == "ls") {
968 &Input::File(ref ifile) => {
969 let path = &(*ifile);
970 let mut v = Vec::new();
971 locator::list_file_metadata(&sess.target.target,
973 &*cstore.metadata_loader,
976 println!("{}", String::from_utf8(v).unwrap());
978 &Input::Str { .. } => {
979 early_error(ErrorOutputType::default(), "cannot list metadata for stdin");
982 return Compilation::Stop;
985 Compilation::Continue
989 fn print_crate_info(codegen_backend: &dyn CodegenBackend,
991 input: Option<&Input>,
992 odir: &Option<PathBuf>,
993 ofile: &Option<PathBuf>)
995 use rustc::session::config::PrintRequest::*;
996 // PrintRequest::NativeStaticLibs is special - printed during linking
997 // (empty iterator returns true)
998 if sess.opts.prints.iter().all(|&p| p == PrintRequest::NativeStaticLibs) {
999 return Compilation::Continue;
1002 let attrs = match input {
1005 let result = parse_crate_attrs(sess, input);
1007 Ok(attrs) => Some(attrs),
1008 Err(mut parse_error) => {
1010 return Compilation::Stop;
1015 for req in &sess.opts.prints {
1018 let mut targets = rustc_target::spec::get_targets().collect::<Vec<String>>();
1020 println!("{}", targets.join("\n"));
1022 Sysroot => println!("{}", sess.sysroot.display()),
1023 TargetSpec => println!("{}", sess.target.target.to_json().pretty()),
1024 FileNames | CrateName => {
1025 let input = input.unwrap_or_else(||
1026 early_error(ErrorOutputType::default(), "no input file provided"));
1027 let attrs = attrs.as_ref().unwrap();
1028 let t_outputs = driver::build_output_filenames(input, odir, ofile, attrs, sess);
1029 let id = rustc_codegen_utils::link::find_crate_name(Some(sess), attrs, input);
1030 if *req == PrintRequest::CrateName {
1034 let crate_types = driver::collect_crate_types(sess, attrs);
1035 for &style in &crate_types {
1036 let fname = rustc_codegen_utils::link::filename_for_input(
1042 println!("{}", fname.file_name().unwrap().to_string_lossy());
1046 let allow_unstable_cfg = UnstableFeatures::from_environment()
1047 .is_nightly_build();
1049 let mut cfgs = sess.parse_sess.config.iter().filter_map(|&(name, ref value)| {
1050 let gated_cfg = GatedCfg::gate(&ast::MetaItem {
1051 ident: ast::Path::from_ident(ast::Ident::with_empty_ctxt(name)),
1052 node: ast::MetaItemKind::Word,
1056 // Note that crt-static is a specially recognized cfg
1057 // directive that's printed out here as part of
1058 // rust-lang/rust#37406, but in general the
1059 // `target_feature` cfg is gated under
1060 // rust-lang/rust#29717. For now this is just
1061 // specifically allowing the crt-static cfg and that's
1062 // it, this is intended to get into Cargo and then go
1063 // through to build scripts.
1064 let value = value.as_ref().map(|s| s.as_str());
1065 let value = value.as_ref().map(|s| s.as_ref());
1066 if name != "target_feature" || value != Some("crt-static") {
1067 if !allow_unstable_cfg && gated_cfg.is_some() {
1072 if let Some(value) = value {
1073 Some(format!("{}=\"{}\"", name, value))
1075 Some(name.to_string())
1077 }).collect::<Vec<String>>();
1081 println!("{}", cfg);
1084 RelocationModels | CodeModels | TlsModels | TargetCPUs | TargetFeatures => {
1085 codegen_backend.print(*req, sess);
1087 // Any output here interferes with Cargo's parsing of other printed output
1088 PrintRequest::NativeStaticLibs => {}
1091 return Compilation::Stop;
1095 /// Returns a version string such as "0.12.0-dev".
1096 fn release_str() -> Option<&'static str> {
1097 option_env!("CFG_RELEASE")
1100 /// Returns the full SHA1 hash of HEAD of the Git repo from which rustc was built.
1101 fn commit_hash_str() -> Option<&'static str> {
1102 option_env!("CFG_VER_HASH")
1105 /// Returns the "commit date" of HEAD of the Git repo from which rustc was built as a static string.
1106 fn commit_date_str() -> Option<&'static str> {
1107 option_env!("CFG_VER_DATE")
1110 /// Prints version information
1111 pub fn version(binary: &str, matches: &getopts::Matches) {
1112 let verbose = matches.opt_present("verbose");
1114 println!("{} {}", binary, option_env!("CFG_VERSION").unwrap_or("unknown version"));
1117 fn unw(x: Option<&str>) -> &str {
1118 x.unwrap_or("unknown")
1120 println!("binary: {}", binary);
1121 println!("commit-hash: {}", unw(commit_hash_str()));
1122 println!("commit-date: {}", unw(commit_date_str()));
1123 println!("host: {}", config::host_triple());
1124 println!("release: {}", unw(release_str()));
1125 get_codegen_sysroot("llvm")().print_version();
1129 fn usage(verbose: bool, include_unstable_options: bool) {
1130 let groups = if verbose {
1131 config::rustc_optgroups()
1133 config::rustc_short_optgroups()
1135 let mut options = getopts::Options::new();
1136 for option in groups.iter().filter(|x| include_unstable_options || x.is_stable()) {
1137 (option.apply)(&mut options);
1139 let message = "Usage: rustc [OPTIONS] INPUT";
1140 let nightly_help = if nightly_options::is_nightly_build() {
1141 "\n -Z help Print internal options for debugging rustc"
1145 let verbose_help = if verbose {
1148 "\n --help -v Print the full set of options rustc accepts"
1150 println!("{}\nAdditional help:
1151 -C help Print codegen options
1153 Print 'lint' options and default settings{}{}\n",
1154 options.usage(message),
1159 fn print_wall_help() {
1161 The flag `-Wall` does not exist in `rustc`. Most useful lints are enabled by
1162 default. Use `rustc -W help` to see all available lints. It's more common to put
1163 warning settings in the crate root using `#![warn(LINT_NAME)]` instead of using
1164 the command line flag directly.
1168 fn describe_lints(sess: &Session, lint_store: &lint::LintStore, loaded_plugins: bool) {
1170 Available lint options:
1171 -W <foo> Warn about <foo>
1175 -F <foo> Forbid <foo> \
1176 (deny <foo> and all attempts to override)
1180 fn sort_lints(sess: &Session, lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
1181 let mut lints: Vec<_> = lints.into_iter().map(|(x, _)| x).collect();
1182 // The sort doesn't case-fold but it's doubtful we care.
1183 lints.sort_by_cached_key(|x: &&Lint| (x.default_level(sess), x.name));
1187 fn sort_lint_groups(lints: Vec<(&'static str, Vec<lint::LintId>, bool)>)
1188 -> Vec<(&'static str, Vec<lint::LintId>)> {
1189 let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
1190 lints.sort_by_key(|l| l.0);
1194 let (plugin, builtin): (Vec<_>, _) = lint_store.get_lints()
1197 .partition(|&(_, p)| p);
1198 let plugin = sort_lints(sess, plugin);
1199 let builtin = sort_lints(sess, builtin);
1201 let (plugin_groups, builtin_groups): (Vec<_>, _) = lint_store.get_lint_groups()
1204 .partition(|&(.., p)| p);
1205 let plugin_groups = sort_lint_groups(plugin_groups);
1206 let builtin_groups = sort_lint_groups(builtin_groups);
1208 let max_name_len = plugin.iter()
1210 .map(|&s| s.name.chars().count())
1213 let padded = |x: &str| {
1214 let mut s = " ".repeat(max_name_len - x.chars().count());
1219 println!("Lint checks provided by rustc:\n");
1220 println!(" {} {:7.7} {}", padded("name"), "default", "meaning");
1221 println!(" {} {:7.7} {}", padded("----"), "-------", "-------");
1223 let print_lints = |lints: Vec<&Lint>| {
1225 let name = lint.name_lower().replace("_", "-");
1226 println!(" {} {:7.7} {}",
1228 lint.default_level.as_str(),
1234 print_lints(builtin);
1236 let max_name_len = max("warnings".len(),
1237 plugin_groups.iter()
1238 .chain(&builtin_groups)
1239 .map(|&(s, _)| s.chars().count())
1243 let padded = |x: &str| {
1244 let mut s = " ".repeat(max_name_len - x.chars().count());
1249 println!("Lint groups provided by rustc:\n");
1250 println!(" {} {}", padded("name"), "sub-lints");
1251 println!(" {} {}", padded("----"), "---------");
1252 println!(" {} {}", padded("warnings"), "all lints that are set to issue warnings");
1254 let print_lint_groups = |lints: Vec<(&'static str, Vec<lint::LintId>)>| {
1255 for (name, to) in lints {
1256 let name = name.to_lowercase().replace("_", "-");
1257 let desc = to.into_iter()
1258 .map(|x| x.to_string().replace("_", "-"))
1259 .collect::<Vec<String>>()
1261 println!(" {} {}", padded(&name), desc);
1266 print_lint_groups(builtin_groups);
1268 match (loaded_plugins, plugin.len(), plugin_groups.len()) {
1269 (false, 0, _) | (false, _, 0) => {
1270 println!("Compiler plugins can provide additional lints and lint groups. To see a \
1271 listing of these, re-run `rustc -W help` with a crate filename.");
1273 (false, ..) => panic!("didn't load lint plugins but got them anyway!"),
1274 (true, 0, 0) => println!("This crate does not load any lint plugins or lint groups."),
1277 println!("Lint checks provided by plugins loaded by this crate:\n");
1278 print_lints(plugin);
1281 println!("Lint groups provided by plugins loaded by this crate:\n");
1282 print_lint_groups(plugin_groups);
1288 fn describe_debug_flags() {
1289 println!("\nAvailable debug options:\n");
1290 print_flag_list("-Z", config::DB_OPTIONS);
1293 fn describe_codegen_flags() {
1294 println!("\nAvailable codegen options:\n");
1295 print_flag_list("-C", config::CG_OPTIONS);
1298 fn print_flag_list<T>(cmdline_opt: &str,
1299 flag_list: &[(&'static str, T, Option<&'static str>, &'static str)]) {
1300 let max_len = flag_list.iter()
1301 .map(|&(name, _, opt_type_desc, _)| {
1302 let extra_len = match opt_type_desc {
1306 name.chars().count() + extra_len
1311 for &(name, _, opt_type_desc, desc) in flag_list {
1312 let (width, extra) = match opt_type_desc {
1313 Some(..) => (max_len - 4, "=val"),
1314 None => (max_len, ""),
1316 println!(" {} {:>width$}{} -- {}",
1318 name.replace("_", "-"),
1325 /// Process command line options. Emits messages as appropriate. If compilation
1326 /// should continue, returns a getopts::Matches object parsed from args,
1327 /// otherwise returns None.
1329 /// The compiler's handling of options is a little complicated as it ties into
1330 /// our stability story, and it's even *more* complicated by historical
1331 /// accidents. The current intention of each compiler option is to have one of
1334 /// 1. An option is stable and can be used everywhere.
1335 /// 2. An option is unstable, but was historically allowed on the stable
1337 /// 3. An option is unstable, and can only be used on nightly.
1339 /// Like unstable library and language features, however, unstable options have
1340 /// always required a form of "opt in" to indicate that you're using them. This
1341 /// provides the easy ability to scan a code base to check to see if anything
1342 /// unstable is being used. Currently, this "opt in" is the `-Z` "zed" flag.
1344 /// All options behind `-Z` are considered unstable by default. Other top-level
1345 /// options can also be considered unstable, and they were unlocked through the
1346 /// `-Z unstable-options` flag. Note that `-Z` remains to be the root of
1347 /// instability in both cases, though.
1349 /// So with all that in mind, the comments below have some more detail about the
1350 /// contortions done here to get things to work out correctly.
1351 pub fn handle_options(args: &[String]) -> Option<getopts::Matches> {
1352 // Throw away the first argument, the name of the binary
1353 let args = &args[1..];
1355 if args.is_empty() {
1356 // user did not write `-v` nor `-Z unstable-options`, so do not
1357 // include that extra information.
1358 usage(false, false);
1362 // Parse with *all* options defined in the compiler, we don't worry about
1363 // option stability here we just want to parse as much as possible.
1364 let mut options = getopts::Options::new();
1365 for option in config::rustc_optgroups() {
1366 (option.apply)(&mut options);
1368 let matches = options.parse(args).unwrap_or_else(|f|
1369 early_error(ErrorOutputType::default(), &f.to_string()));
1371 // For all options we just parsed, we check a few aspects:
1373 // * If the option is stable, we're all good
1374 // * If the option wasn't passed, we're all good
1375 // * If `-Z unstable-options` wasn't passed (and we're not a -Z option
1376 // ourselves), then we require the `-Z unstable-options` flag to unlock
1377 // this option that was passed.
1378 // * If we're a nightly compiler, then unstable options are now unlocked, so
1379 // we're good to go.
1380 // * Otherwise, if we're a truly unstable option then we generate an error
1381 // (unstable option being used on stable)
1382 // * If we're a historically stable-but-should-be-unstable option then we
1383 // emit a warning that we're going to turn this into an error soon.
1384 nightly_options::check_nightly_options(&matches, &config::rustc_optgroups());
1386 if matches.opt_present("h") || matches.opt_present("help") {
1387 // Only show unstable options in --help if we *really* accept unstable
1388 // options, which catches the case where we got `-Z unstable-options` on
1389 // the stable channel of Rust which was accidentally allowed
1391 usage(matches.opt_present("verbose"),
1392 nightly_options::is_unstable_enabled(&matches));
1396 // Handle the special case of -Wall.
1397 let wall = matches.opt_strs("W");
1398 if wall.iter().any(|x| *x == "all") {
1403 // Don't handle -W help here, because we might first load plugins.
1404 let r = matches.opt_strs("Z");
1405 if r.iter().any(|x| *x == "help") {
1406 describe_debug_flags();
1410 let cg_flags = matches.opt_strs("C");
1412 if cg_flags.iter().any(|x| *x == "help") {
1413 describe_codegen_flags();
1417 if cg_flags.iter().any(|x| *x == "no-stack-check") {
1418 early_warn(ErrorOutputType::default(),
1419 "the --no-stack-check flag is deprecated and does nothing");
1422 if cg_flags.iter().any(|x| *x == "passes=list") {
1423 get_codegen_sysroot("llvm")().print_passes();
1427 if matches.opt_present("version") {
1428 version("rustc", &matches);
1435 fn parse_crate_attrs<'a>(sess: &'a Session, input: &Input) -> PResult<'a, Vec<ast::Attribute>> {
1437 Input::File(ref ifile) => {
1438 parse::parse_crate_attrs_from_file(ifile, &sess.parse_sess)
1440 Input::Str { ref name, ref input } => {
1441 parse::parse_crate_attrs_from_source_str(name.clone(),
1448 // Temporarily have stack size set to 32MB to deal with various crates with long method
1449 // chains or deep syntax trees.
1450 // FIXME(oli-obk): get https://github.com/rust-lang/rust/pull/55617 the finish line
1451 const STACK_SIZE: usize = 32 * 1024 * 1024; // 32MB
1453 /// Runs `f` in a suitable thread for running `rustc`; returns a `Result` with either the return
1454 /// value of `f` or -- if a panic occurs -- the panic value.
1456 /// This version applies the given name to the thread. This is used by rustdoc to ensure consistent
1457 /// doctest output across platforms and executions.
1458 pub fn in_named_rustc_thread<F, R>(name: String, f: F) -> Result<R, Box<dyn Any + Send>>
1459 where F: FnOnce() -> R + Send + 'static,
1462 // We need a thread for soundness of thread local storage in rustc. For debugging purposes
1463 // we allow an escape hatch where everything runs on the main thread.
1464 if env::var_os("RUSTC_UNSTABLE_NO_MAIN_THREAD").is_none() {
1465 let mut cfg = thread::Builder::new().name(name);
1467 // If the env is trying to override the stack size then *don't* set it explicitly.
1468 // The libstd thread impl will fetch the `RUST_MIN_STACK` env var itself.
1469 if env::var_os("RUST_MIN_STACK").is_none() {
1470 cfg = cfg.stack_size(STACK_SIZE);
1473 let thread = cfg.spawn(f);
1474 thread.unwrap().join()
1476 let f = panic::AssertUnwindSafe(f);
1477 panic::catch_unwind(f)
1481 /// Runs `f` in a suitable thread for running `rustc`; returns a
1482 /// `Result` with either the return value of `f` or -- if a panic
1483 /// occurs -- the panic value.
1484 pub fn in_rustc_thread<F, R>(f: F) -> Result<R, Box<dyn Any + Send>>
1485 where F: FnOnce() -> R + Send + 'static,
1488 in_named_rustc_thread("rustc".to_string(), f)
1491 /// Get a list of extra command-line flags provided by the user, as strings.
1493 /// This function is used during ICEs to show more information useful for
1494 /// debugging, since some ICEs only happens with non-default compiler flags
1495 /// (and the users don't always report them).
1496 fn extra_compiler_flags() -> Option<(Vec<String>, bool)> {
1497 let args = env::args_os().map(|arg| arg.to_string_lossy().to_string()).collect::<Vec<_>>();
1499 // Avoid printing help because of empty args. This can suggest the compiler
1500 // itself is not the program root (consider RLS).
1505 let matches = if let Some(matches) = handle_options(&args) {
1511 let mut result = Vec::new();
1512 let mut excluded_cargo_defaults = false;
1513 for flag in ICE_REPORT_COMPILER_FLAGS {
1514 let prefix = if flag.len() == 1 { "-" } else { "--" };
1516 for content in &matches.opt_strs(flag) {
1517 // Split always returns the first element
1518 let name = if let Some(first) = content.split('=').next() {
1524 let content = if ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE.contains(&name) {
1530 if !ICE_REPORT_COMPILER_FLAGS_EXCLUDE.contains(&name) {
1531 result.push(format!("{}{} {}", prefix, flag, content));
1533 excluded_cargo_defaults = true;
1538 if !result.is_empty() {
1539 Some((result, excluded_cargo_defaults))
1546 pub struct CompilationFailure;
1548 impl Error for CompilationFailure {}
1550 impl Display for CompilationFailure {
1551 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
1552 write!(f, "compilation had errors")
1556 /// Run a procedure which will detect panics in the compiler and print nicer
1557 /// error messages rather than just failing the test.
1559 /// The diagnostic emitter yielded to the procedure should be used for reporting
1560 /// errors of the compiler.
1561 pub fn monitor<F: FnOnce() + Send + 'static>(f: F) -> Result<(), CompilationFailure> {
1562 in_rustc_thread(move || {
1564 }).map_err(|value| {
1565 if value.is::<errors::FatalErrorMarker>() {
1568 // Thread panicked without emitting a fatal diagnostic
1572 Box::new(errors::emitter::EmitterWriter::stderr(errors::ColorConfig::Auto,
1576 let handler = errors::Handler::with_emitter(true, false, emitter);
1578 // a .span_bug or .bug call has already printed what
1579 // it wants to print.
1580 if !value.is::<errors::ExplicitBug>() {
1581 handler.emit(&MultiSpan::new(),
1583 errors::Level::Bug);
1586 let mut xs: Vec<Cow<'static, str>> = vec![
1587 "the compiler unexpectedly panicked. this is a bug.".into(),
1588 format!("we would appreciate a bug report: {}", BUG_REPORT_URL).into(),
1589 format!("rustc {} running on {}",
1590 option_env!("CFG_VERSION").unwrap_or("unknown_version"),
1591 config::host_triple()).into(),
1594 if let Some((flags, excluded_cargo_defaults)) = extra_compiler_flags() {
1595 xs.push(format!("compiler flags: {}", flags.join(" ")).into());
1597 if excluded_cargo_defaults {
1598 xs.push("some of the compiler flags provided by cargo are hidden".into());
1603 handler.emit(&MultiSpan::new(),
1605 errors::Level::Note);
1608 panic::resume_unwind(Box::new(errors::FatalErrorMarker));
1613 pub fn diagnostics_registry() -> errors::registry::Registry {
1614 use errors::registry::Registry;
1616 let mut all_errors = Vec::new();
1617 all_errors.extend_from_slice(&rustc::DIAGNOSTICS);
1618 all_errors.extend_from_slice(&rustc_typeck::DIAGNOSTICS);
1619 all_errors.extend_from_slice(&rustc_resolve::DIAGNOSTICS);
1620 all_errors.extend_from_slice(&rustc_privacy::DIAGNOSTICS);
1621 // FIXME: need to figure out a way to get these back in here
1622 // all_errors.extend_from_slice(get_codegen_backend(sess).diagnostics());
1623 all_errors.extend_from_slice(&rustc_metadata::DIAGNOSTICS);
1624 all_errors.extend_from_slice(&rustc_passes::DIAGNOSTICS);
1625 all_errors.extend_from_slice(&rustc_plugin::DIAGNOSTICS);
1626 all_errors.extend_from_slice(&rustc_mir::DIAGNOSTICS);
1627 all_errors.extend_from_slice(&syntax::DIAGNOSTICS);
1629 Registry::new(&all_errors)
1632 /// This allows tools to enable rust logging without having to magically match rustc's
1633 /// log crate version
1634 pub fn init_rustc_env_logger() {
1639 init_rustc_env_logger();
1640 let result = run(|| {
1641 let args = env::args_os().enumerate()
1642 .map(|(i, arg)| arg.into_string().unwrap_or_else(|arg| {
1643 early_error(ErrorOutputType::default(),
1644 &format!("Argument {} is not valid Unicode: {:?}", i, arg))
1646 .collect::<Vec<_>>();
1648 Box::new(RustcDefaultCalls),
1652 process::exit(result as i32);