1 // Copyright 2012-2013 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 #[link(name = "rustc",
13 uuid = "0ce89b41-2f92-459e-bbc1-8f5fe32f16cf",
14 url = "https://github.com/mozilla/rust/tree/master/src/rustc")];
16 #[comment = "The Rust compiler"];
17 #[license = "MIT/ASL2"];
18 #[crate_type = "lib"];
23 use driver::driver::{host_triple, optgroups, early_error};
24 use driver::driver::{str_input, file_input, build_session_options};
25 use driver::driver::{build_session, build_configuration, parse_pretty};
26 use driver::driver::{pp_mode, pretty_print_input, list_metadata};
27 use driver::driver::{compile_input};
38 use extra::getopts::{groups, opt_present};
41 use syntax::diagnostic;
55 pub mod mem_categorization;
105 // A curious inner module that allows ::std::foo to be available in here for
114 pub use std::to_bytes;
115 pub use std::unstable;
116 pub use extra::serialize;
120 pub fn version(argv0: &str) {
121 let mut vers = ~"unknown version";
122 let env_vers = env!("CFG_VERSION");
123 if env_vers.len() != 0 { vers = env_vers.to_owned(); }
124 printfln!("%s %s", argv0, vers);
125 printfln!("host: %s", host_triple());
128 pub fn usage(argv0: &str) {
129 let message = fmt!("Usage: %s [OPTIONS] INPUT", argv0);
132 -W help Print 'lint' options and default settings
133 -Z help Print internal options for debugging rustc\n",
134 groups::usage(message, optgroups()));
137 pub fn describe_warnings() {
138 use extra::sort::Sort;
140 Available lint options:
141 -W <foo> Warn about <foo>
144 -F <foo> Forbid <foo> (deny, and deny all overrides)
147 let lint_dict = lint::get_lint_dict();
148 let mut lint_dict = lint_dict.consume()
149 .transform(|(k, v)| (v, k))
150 .collect::<~[(lint::LintSpec, &'static str)]>();
154 for &(_, name) in lint_dict.iter() {
155 max_key = num::max(name.len(), max_key);
157 fn padded(max: uint, s: &str) -> ~str {
158 str::from_bytes(vec::from_elem(max - s.len(), ' ' as u8)) + s
160 println("\nAvailable lint checks:\n");
161 printfln!(" %s %7.7s %s",
162 padded(max_key, "name"), "default", "meaning");
163 printfln!(" %s %7.7s %s\n",
164 padded(max_key, "----"), "-------", "-------");
165 for (spec, name) in lint_dict.consume_iter() {
166 let name = name.replace("_", "-");
167 printfln!(" %s %7.7s %s",
168 padded(max_key, name),
169 lint::level_to_str(spec.default),
175 pub fn describe_debug_flags() {
176 println("\nAvailable debug options:\n");
177 let r = session::debugging_opts_map();
178 for tuple in r.iter() {
180 (ref name, ref desc, _) => {
181 printfln!(" -Z %-20s -- %s", *name, *desc);
187 pub fn run_compiler(args: &~[~str], demitter: diagnostic::Emitter) {
188 // Don't display log spew by default. Can override with RUST_LOG.
189 ::std::logging::console_off();
191 let mut args = (*args).clone();
192 let binary = args.shift().to_managed();
194 if args.is_empty() { usage(binary); return; }
197 &match getopts::groups::getopts(args, optgroups()) {
200 early_error(demitter, getopts::fail_str(f));
204 if opt_present(matches, "h") || opt_present(matches, "help") {
209 // Display the available lint options if "-W help" or only "-W" is given.
210 let lint_flags = vec::append(getopts::opt_strs(matches, "W"),
211 getopts::opt_strs(matches, "warn"));
213 let show_lint_options = lint_flags.iter().any(|x| x == &~"help") ||
214 (opt_present(matches, "W") && lint_flags.is_empty());
216 if show_lint_options {
221 let r = getopts::opt_strs(matches, "Z");
222 if r.iter().any(|x| x == &~"help") {
223 describe_debug_flags();
227 if getopts::opt_maybe_str(matches, "passes") == Some(~"list") {
228 back::passes::list_passes();
232 if opt_present(matches, "v") || opt_present(matches, "version") {
236 let input = match matches.free.len() {
237 0u => early_error(demitter, ~"no input filename given"),
239 let ifile = matches.free[0].as_slice();
241 let src = str::from_bytes(io::stdin().read_whole_stream());
242 str_input(src.to_managed())
244 file_input(Path(ifile))
247 _ => early_error(demitter, ~"multiple input filenames provided")
250 let sopts = build_session_options(binary, matches, demitter);
251 let sess = build_session(sopts, demitter);
252 let odir = getopts::opt_maybe_str(matches, "out-dir").map_move(|o| Path(o));
253 let ofile = getopts::opt_maybe_str(matches, "o").map_move(|o| Path(o));
254 let cfg = build_configuration(sess, binary, &input);
255 let pretty = do getopts::opt_default(matches, "pretty", "normal").map_move |a| {
256 parse_pretty(sess, a)
259 Some::<pp_mode>(ppm) => {
260 pretty_print_input(sess, cfg, &input, ppm);
263 None::<pp_mode> => {/* continue */ }
265 let ls = opt_present(matches, "ls");
268 file_input(ref ifile) => {
269 list_metadata(sess, &(*ifile), io::stdout());
272 early_error(demitter, ~"can not list metadata for stdin");
278 compile_input(sess, cfg, &input, &odir, &ofile);
282 pub enum monitor_msg {
288 This is a sanity check that any failure of the compiler is performed
289 through the diagnostic module and reported properly - we shouldn't be calling
290 plain-old-fail on any execution path that might be taken. Since we have
291 console logging off by default, hitting a plain fail statement would make the
292 compiler silently exit, which would be terrible.
294 This method wraps the compiler in a subtask and injects a function into the
295 diagnostic emitter which records when we hit a fatal error. If the task
296 fails without recording a fatal error then we've encountered a compiler
297 bug and need to present an error.
299 pub fn monitor(f: ~fn(diagnostic::Emitter)) {
302 // XXX: This is a hack for newsched since it doesn't support split stacks.
303 // rustc needs a lot of stack!
304 static STACK_SIZE: uint = 4000000;
306 let (p, ch) = stream();
307 let ch = SharedChan::new(ch);
308 let ch_capture = ch.clone();
309 let mut task_builder = task::task();
310 task_builder.supervised();
311 task_builder.opts.stack_size = Some(STACK_SIZE);
312 match do task_builder.try {
313 let ch = ch_capture.clone();
314 let ch_capture = ch.clone();
315 // The 'diagnostics emitter'. Every error, warning, etc. should
316 // go through this function.
317 let demitter: @fn(Option<(@codemap::CodeMap, codemap::span)>,
321 if lvl == diagnostic::fatal {
322 ch_capture.send(fatal);
324 diagnostic::emit(cmsp, msg, lvl);
328 ch: SharedChan<monitor_msg>,
331 impl Drop for finally {
332 fn drop(&self) { self.ch.send(done); }
335 let _finally = finally { ch: ch };
339 // Due reasons explain in #7732, if there was a jit execution context it
340 // must be consumed and passed along to our parent task.
341 back::link::jit::consume_engine()
343 result::Ok(_) => { /* fallthrough */ }
345 // Task failed without emitting a fatal diagnostic
346 if p.recv() == done {
349 diagnostic::ice_msg("unexpected failure"),
353 ~"the compiler hit an unexpected failure path. \
355 ~"try running with RUST_LOG=rustc=1,::rt::backtrace \
356 to get further details and report the results \
357 to github.com/mozilla/rust/issues"
359 for note in xs.iter() {
360 diagnostic::emit(None, *note, diagnostic::note)
363 // Fail so the process returns a failure code
370 let args = os::args();
371 do monitor |demitter| {
372 run_compiler(&args, demitter);