93b642d974
#[plugin] #[no_link] extern crate bleh;
becomes a crate attribute
#![plugin(bleh)]
The feature gate is still required.
It's almost never correct to link a plugin into the resulting library /
executable, because it will bring all of libsyntax and librustc with it.
However if you really want this behavior, you can get it with a separate
`extern crate` item in addition to the `plugin` attribute.
Fixes #21043.
Fixes #20769.
[breaking-change]
690 lines
24 KiB
Rust
690 lines
24 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! The Rust compiler.
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//!
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//! # Note
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//!
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//! This API is completely unstable and subject to change.
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#![crate_name = "rustc_driver"]
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#![unstable(feature = "rustc_private")]
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#![staged_api]
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#![crate_type = "dylib"]
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#![crate_type = "rlib"]
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#![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
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html_favicon_url = "http://www.rust-lang.org/favicon.ico",
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html_root_url = "http://doc.rust-lang.org/nightly/")]
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#![feature(box_syntax)]
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#![feature(collections)]
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#![feature(core)]
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#![feature(env)]
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#![feature(int_uint)]
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#![feature(io)]
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#![feature(libc)]
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#![feature(os)]
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#![feature(path)]
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#![feature(quote)]
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#![feature(rustc_diagnostic_macros)]
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#![feature(rustc_private)]
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#![feature(slicing_syntax, unsafe_destructor)]
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#![feature(staged_api)]
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#![feature(std_misc)]
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#![feature(unicode)]
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extern crate arena;
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extern crate flate;
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extern crate getopts;
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extern crate graphviz;
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extern crate libc;
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extern crate rustc;
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extern crate rustc_back;
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extern crate rustc_borrowck;
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extern crate rustc_privacy;
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extern crate rustc_resolve;
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extern crate rustc_trans;
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extern crate rustc_typeck;
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extern crate serialize;
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extern crate "rustc_llvm" as llvm;
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#[macro_use] extern crate log;
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#[macro_use] extern crate syntax;
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pub use syntax::diagnostic;
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use driver::CompileController;
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use rustc_resolve as resolve;
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use rustc_trans::back::link;
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use rustc_trans::save;
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use rustc::session::{config, Session, build_session};
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use rustc::session::config::{Input, PrintRequest, UnstableFeatures};
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use rustc::lint::Lint;
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use rustc::lint;
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use rustc::metadata;
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use rustc::util::common::time;
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use std::cmp::Ordering::Equal;
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use std::old_io;
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use std::iter::repeat;
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use std::env;
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use std::sync::mpsc::channel;
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use std::thread;
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use rustc::session::early_error;
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use syntax::ast;
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use syntax::parse;
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use syntax::diagnostic::Emitter;
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use syntax::diagnostics;
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#[cfg(test)]
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pub mod test;
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pub mod driver;
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pub mod pretty;
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pub fn run(args: Vec<String>) -> int {
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monitor(move || run_compiler(&args));
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0
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}
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static BUG_REPORT_URL: &'static str =
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"http://doc.rust-lang.org/complement-bugreport.html";
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fn run_compiler(args: &[String]) {
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let matches = match handle_options(args.to_vec()) {
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Some(matches) => matches,
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None => return
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};
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let descriptions = diagnostics_registry();
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match matches.opt_str("explain") {
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Some(ref code) => {
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match descriptions.find_description(&code[]) {
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Some(ref description) => {
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println!("{}", description);
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}
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None => {
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early_error(&format!("no extended information for {}", code)[]);
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}
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}
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return;
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},
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None => ()
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}
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let sopts = config::build_session_options(&matches);
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let odir = matches.opt_str("out-dir").map(|o| Path::new(o));
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let ofile = matches.opt_str("o").map(|o| Path::new(o));
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let (input, input_file_path) = match matches.free.len() {
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0 => {
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if sopts.describe_lints {
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let mut ls = lint::LintStore::new();
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ls.register_builtin(None);
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describe_lints(&ls, false);
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return;
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}
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let sess = build_session(sopts, None, descriptions);
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if print_crate_info(&sess, None, &odir, &ofile) {
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return;
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}
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early_error("no input filename given");
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}
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1 => {
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let ifile = &matches.free[0][];
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if ifile == "-" {
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let contents = old_io::stdin().read_to_end().unwrap();
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let src = String::from_utf8(contents).unwrap();
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(Input::Str(src), None)
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} else {
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(Input::File(Path::new(ifile)), Some(Path::new(ifile)))
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}
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}
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_ => early_error("multiple input filenames provided")
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};
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let mut sopts = sopts;
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sopts.unstable_features = get_unstable_features_setting();
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let mut sess = build_session(sopts, input_file_path, descriptions);
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let cfg = config::build_configuration(&sess);
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if print_crate_info(&sess, Some(&input), &odir, &ofile) {
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return
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}
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let pretty = if sess.opts.debugging_opts.unstable_options {
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matches.opt_default("pretty", "normal").map(|a| {
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// stable pretty-print variants only
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pretty::parse_pretty(&sess, &a, false)
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})
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} else {
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None
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};
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let pretty = if pretty.is_none() &&
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sess.unstable_options() {
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matches.opt_str("xpretty").map(|a| {
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// extended with unstable pretty-print variants
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pretty::parse_pretty(&sess, &a, true)
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})
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} else {
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pretty
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};
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match pretty.into_iter().next() {
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Some((ppm, opt_uii)) => {
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pretty::pretty_print_input(sess, cfg, &input, ppm, opt_uii, ofile);
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return;
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}
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None => {/* continue */ }
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}
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if sess.unstable_options() {
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sess.opts.show_span = matches.opt_str("show-span");
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}
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let r = matches.opt_strs("Z");
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if r.contains(&("ls".to_string())) {
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match input {
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Input::File(ref ifile) => {
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let mut stdout = old_io::stdout();
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list_metadata(&sess, &(*ifile), &mut stdout).unwrap();
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}
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Input::Str(_) => {
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early_error("cannot list metadata for stdin");
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}
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}
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return;
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}
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let plugins = sess.opts.debugging_opts.extra_plugins.clone();
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let control = build_controller(&sess);
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driver::compile_input(sess, cfg, &input, &odir, &ofile, Some(plugins), control);
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}
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fn build_controller<'a>(sess: &Session) -> CompileController<'a> {
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let mut control = CompileController::basic();
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if sess.opts.parse_only ||
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sess.opts.show_span.is_some() ||
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sess.opts.debugging_opts.ast_json_noexpand {
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control.after_parse.stop = true;
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}
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if sess.opts.no_analysis || sess.opts.debugging_opts.ast_json {
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control.after_write_deps.stop = true;
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}
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if sess.opts.no_trans {
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control.after_analysis.stop = true;
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}
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if !sess.opts.output_types.iter().any(|&i| i == config::OutputTypeExe) {
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control.after_llvm.stop = true;
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}
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if sess.opts.debugging_opts.save_analysis {
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control.after_analysis.callback = box |state| {
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time(state.session.time_passes(), "save analysis", state.krate.unwrap(), |krate|
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save::process_crate(state.session,
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krate,
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state.analysis.unwrap(),
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state.out_dir));
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};
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control.make_glob_map = resolve::MakeGlobMap::Yes;
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}
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control
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}
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pub fn get_unstable_features_setting() -> UnstableFeatures {
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// Whether this is a feature-staged build, i.e. on the beta or stable channel
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let disable_unstable_features = option_env!("CFG_DISABLE_UNSTABLE_FEATURES").is_some();
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// The secret key needed to get through the rustc build itself by
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// subverting the unstable features lints
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let bootstrap_secret_key = option_env!("CFG_BOOTSTRAP_KEY");
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// The matching key to the above, only known by the build system
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let bootstrap_provided_key = env::var_string("RUSTC_BOOTSTRAP_KEY").ok();
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match (disable_unstable_features, bootstrap_secret_key, bootstrap_provided_key) {
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(_, Some(ref s), Some(ref p)) if s == p => UnstableFeatures::Cheat,
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(true, _, _) => UnstableFeatures::Disallow,
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(false, _, _) => UnstableFeatures::Default
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}
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}
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/// Returns a version string such as "0.12.0-dev".
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pub fn release_str() -> Option<&'static str> {
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option_env!("CFG_RELEASE")
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}
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/// Returns the full SHA1 hash of HEAD of the Git repo from which rustc was built.
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pub fn commit_hash_str() -> Option<&'static str> {
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option_env!("CFG_VER_HASH")
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}
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/// Returns the "commit date" of HEAD of the Git repo from which rustc was built as a static string.
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pub fn commit_date_str() -> Option<&'static str> {
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option_env!("CFG_VER_DATE")
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}
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/// Prints version information and returns None on success or an error
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/// message on panic.
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pub fn version(binary: &str, matches: &getopts::Matches) {
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let verbose = matches.opt_present("verbose");
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println!("{} {}", binary, option_env!("CFG_VERSION").unwrap_or("unknown version"));
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if verbose {
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fn unw(x: Option<&str>) -> &str { x.unwrap_or("unknown") }
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println!("binary: {}", binary);
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println!("commit-hash: {}", unw(commit_hash_str()));
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println!("commit-date: {}", unw(commit_date_str()));
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println!("host: {}", config::host_triple());
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println!("release: {}", unw(release_str()));
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}
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}
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fn usage(verbose: bool, include_unstable_options: bool) {
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let groups = if verbose {
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config::rustc_optgroups()
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} else {
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config::rustc_short_optgroups()
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};
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let groups : Vec<_> = groups.into_iter()
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.filter(|x| include_unstable_options || x.is_stable())
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.map(|x|x.opt_group)
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.collect();
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let message = format!("Usage: rustc [OPTIONS] INPUT");
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let extra_help = if verbose {
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""
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} else {
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"\n --help -v Print the full set of options rustc accepts"
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};
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println!("{}\n\
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Additional help:
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-C help Print codegen options
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-W help Print 'lint' options and default settings
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-Z help Print internal options for debugging rustc{}\n",
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getopts::usage(&message, &groups),
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extra_help);
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}
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fn describe_lints(lint_store: &lint::LintStore, loaded_plugins: bool) {
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println!("
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Available lint options:
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-W <foo> Warn about <foo>
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-A <foo> Allow <foo>
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-D <foo> Deny <foo>
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-F <foo> Forbid <foo> (deny, and deny all overrides)
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");
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fn sort_lints(lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
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let mut lints: Vec<_> = lints.into_iter().map(|(x, _)| x).collect();
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lints.sort_by(|x: &&Lint, y: &&Lint| {
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match x.default_level.cmp(&y.default_level) {
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// The sort doesn't case-fold but it's doubtful we care.
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Equal => x.name.cmp(y.name),
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r => r,
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}
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});
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lints
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}
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fn sort_lint_groups(lints: Vec<(&'static str, Vec<lint::LintId>, bool)>)
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-> Vec<(&'static str, Vec<lint::LintId>)> {
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let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
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lints.sort_by(|&(x, _): &(&'static str, Vec<lint::LintId>),
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&(y, _): &(&'static str, Vec<lint::LintId>)| {
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x.cmp(y)
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});
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lints
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}
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let (plugin, builtin): (Vec<_>, _) = lint_store.get_lints()
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.iter().cloned().partition(|&(_, p)| p);
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let plugin = sort_lints(plugin);
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let builtin = sort_lints(builtin);
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let (plugin_groups, builtin_groups): (Vec<_>, _) = lint_store.get_lint_groups()
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.iter().cloned().partition(|&(_, _, p)| p);
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let plugin_groups = sort_lint_groups(plugin_groups);
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let builtin_groups = sort_lint_groups(builtin_groups);
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let max_name_len = plugin.iter().chain(builtin.iter())
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.map(|&s| s.name.width(true))
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.max().unwrap_or(0);
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let padded = |x: &str| {
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let mut s = repeat(" ").take(max_name_len - x.chars().count())
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.collect::<String>();
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s.push_str(x);
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s
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};
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println!("Lint checks provided by rustc:\n");
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println!(" {} {:7.7} {}", padded("name"), "default", "meaning");
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println!(" {} {:7.7} {}", padded("----"), "-------", "-------");
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let print_lints = |lints: Vec<&Lint>| {
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for lint in lints {
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let name = lint.name_lower().replace("_", "-");
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println!(" {} {:7.7} {}",
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padded(&name[]), lint.default_level.as_str(), lint.desc);
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}
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println!("\n");
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};
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print_lints(builtin);
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let max_name_len = plugin_groups.iter().chain(builtin_groups.iter())
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.map(|&(s, _)| s.width(true))
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.max().unwrap_or(0);
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let padded = |x: &str| {
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let mut s = repeat(" ").take(max_name_len - x.chars().count())
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.collect::<String>();
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s.push_str(x);
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s
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};
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println!("Lint groups provided by rustc:\n");
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println!(" {} {}", padded("name"), "sub-lints");
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println!(" {} {}", padded("----"), "---------");
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let print_lint_groups = |lints: Vec<(&'static str, Vec<lint::LintId>)>| {
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for (name, to) in lints {
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let name = name.chars().map(|x| x.to_lowercase())
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.collect::<String>().replace("_", "-");
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let desc = to.into_iter().map(|x| x.as_str().replace("_", "-"))
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.collect::<Vec<String>>().connect(", ");
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println!(" {} {}",
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padded(&name[]), desc);
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}
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println!("\n");
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};
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print_lint_groups(builtin_groups);
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match (loaded_plugins, plugin.len(), plugin_groups.len()) {
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(false, 0, _) | (false, _, 0) => {
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println!("Compiler plugins can provide additional lints and lint groups. To see a \
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listing of these, re-run `rustc -W help` with a crate filename.");
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}
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(false, _, _) => panic!("didn't load lint plugins but got them anyway!"),
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(true, 0, 0) => println!("This crate does not load any lint plugins or lint groups."),
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(true, l, g) => {
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if l > 0 {
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println!("Lint checks provided by plugins loaded by this crate:\n");
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print_lints(plugin);
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}
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if g > 0 {
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println!("Lint groups provided by plugins loaded by this crate:\n");
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print_lint_groups(plugin_groups);
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}
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}
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}
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}
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fn describe_debug_flags() {
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println!("\nAvailable debug options:\n");
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for &(name, _, opt_type_desc, desc) in config::DB_OPTIONS {
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let (width, extra) = match opt_type_desc {
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Some(..) => (21, "=val"),
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None => (25, "")
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};
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println!(" -Z {:>width$}{} -- {}", name.replace("_", "-"),
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extra, desc, width=width);
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}
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}
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fn describe_codegen_flags() {
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println!("\nAvailable codegen options:\n");
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for &(name, _, opt_type_desc, desc) in config::CG_OPTIONS {
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let (width, extra) = match opt_type_desc {
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Some(..) => (21, "=val"),
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None => (25, "")
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};
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println!(" -C {:>width$}{} -- {}", name.replace("_", "-"),
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extra, desc, width=width);
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}
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}
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/// Process command line options. Emits messages as appropriate. If compilation
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/// should continue, returns a getopts::Matches object parsed from args, otherwise
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/// returns None.
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pub fn handle_options(mut args: Vec<String>) -> Option<getopts::Matches> {
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// Throw away the first argument, the name of the binary
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let _binary = args.remove(0);
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if args.is_empty() {
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// user did not write `-v` nor `-Z unstable-options`, so do not
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// include that extra information.
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usage(false, false);
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return None;
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}
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|
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let matches =
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match getopts::getopts(&args[], &config::optgroups()[]) {
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Ok(m) => m,
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Err(f_stable_attempt) => {
|
|
// redo option parsing, including unstable options this time,
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|
// in anticipation that the mishandled option was one of the
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// unstable ones.
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let all_groups : Vec<getopts::OptGroup>
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= config::rustc_optgroups().into_iter().map(|x|x.opt_group).collect();
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match getopts::getopts(&args, &all_groups) {
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|
Ok(m_unstable) => {
|
|
let r = m_unstable.opt_strs("Z");
|
|
let include_unstable_options = r.iter().any(|x| *x == "unstable-options");
|
|
if include_unstable_options {
|
|
m_unstable
|
|
} else {
|
|
early_error(&f_stable_attempt.to_string());
|
|
}
|
|
}
|
|
Err(_) => {
|
|
// ignore the error from the unstable attempt; just
|
|
// pass the error we got from the first try.
|
|
early_error(&f_stable_attempt.to_string());
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
let r = matches.opt_strs("Z");
|
|
let include_unstable_options = r.iter().any(|x| *x == "unstable-options");
|
|
|
|
if matches.opt_present("h") || matches.opt_present("help") {
|
|
usage(matches.opt_present("verbose"), include_unstable_options);
|
|
return None;
|
|
}
|
|
|
|
// Don't handle -W help here, because we might first load plugins.
|
|
|
|
let r = matches.opt_strs("Z");
|
|
if r.iter().any(|x| *x == "help") {
|
|
describe_debug_flags();
|
|
return None;
|
|
}
|
|
|
|
let cg_flags = matches.opt_strs("C");
|
|
if cg_flags.iter().any(|x| *x == "help") {
|
|
describe_codegen_flags();
|
|
return None;
|
|
}
|
|
|
|
if cg_flags.contains(&"passes=list".to_string()) {
|
|
unsafe { ::llvm::LLVMRustPrintPasses(); }
|
|
return None;
|
|
}
|
|
|
|
if matches.opt_present("version") {
|
|
version("rustc", &matches);
|
|
return None;
|
|
}
|
|
|
|
Some(matches)
|
|
}
|
|
|
|
fn print_crate_info(sess: &Session,
|
|
input: Option<&Input>,
|
|
odir: &Option<Path>,
|
|
ofile: &Option<Path>)
|
|
-> bool {
|
|
if sess.opts.prints.len() == 0 { return false }
|
|
|
|
let attrs = input.map(|input| parse_crate_attrs(sess, input));
|
|
for req in &sess.opts.prints {
|
|
match *req {
|
|
PrintRequest::Sysroot => println!("{}", sess.sysroot().display()),
|
|
PrintRequest::FileNames |
|
|
PrintRequest::CrateName => {
|
|
let input = match input {
|
|
Some(input) => input,
|
|
None => early_error("no input file provided"),
|
|
};
|
|
let attrs = attrs.as_ref().unwrap();
|
|
let t_outputs = driver::build_output_filenames(input,
|
|
odir,
|
|
ofile,
|
|
attrs,
|
|
sess);
|
|
let id = link::find_crate_name(Some(sess), attrs,
|
|
input);
|
|
if *req == PrintRequest::CrateName {
|
|
println!("{}", id);
|
|
continue
|
|
}
|
|
let crate_types = driver::collect_crate_types(sess, attrs);
|
|
let metadata = driver::collect_crate_metadata(sess, attrs);
|
|
*sess.crate_metadata.borrow_mut() = metadata;
|
|
for &style in &crate_types {
|
|
let fname = link::filename_for_input(sess, style,
|
|
&id,
|
|
&t_outputs.with_extension(""));
|
|
println!("{}", fname.filename_display());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
fn parse_crate_attrs(sess: &Session, input: &Input) ->
|
|
Vec<ast::Attribute> {
|
|
let result = match *input {
|
|
Input::File(ref ifile) => {
|
|
parse::parse_crate_attrs_from_file(ifile,
|
|
Vec::new(),
|
|
&sess.parse_sess)
|
|
}
|
|
Input::Str(ref src) => {
|
|
parse::parse_crate_attrs_from_source_str(
|
|
driver::anon_src().to_string(),
|
|
src.to_string(),
|
|
Vec::new(),
|
|
&sess.parse_sess)
|
|
}
|
|
};
|
|
result.into_iter().collect()
|
|
}
|
|
|
|
pub fn list_metadata(sess: &Session, path: &Path,
|
|
out: &mut old_io::Writer) -> old_io::IoResult<()> {
|
|
metadata::loader::list_file_metadata(sess.target.target.options.is_like_osx, path, out)
|
|
}
|
|
|
|
/// Run a procedure which will detect panics in the compiler and print nicer
|
|
/// error messages rather than just failing the test.
|
|
///
|
|
/// The diagnostic emitter yielded to the procedure should be used for reporting
|
|
/// errors of the compiler.
|
|
pub fn monitor<F:FnOnce()+Send>(f: F) {
|
|
static STACK_SIZE: uint = 8 * 1024 * 1024; // 8MB
|
|
|
|
let (tx, rx) = channel();
|
|
let w = old_io::ChanWriter::new(tx);
|
|
let mut r = old_io::ChanReader::new(rx);
|
|
|
|
let mut cfg = thread::Builder::new().name("rustc".to_string());
|
|
|
|
// FIXME: Hacks on hacks. If the env is trying to override the stack size
|
|
// then *don't* set it explicitly.
|
|
if env::var("RUST_MIN_STACK").is_none() {
|
|
cfg = cfg.stack_size(STACK_SIZE);
|
|
}
|
|
|
|
match cfg.scoped(move || { std::old_io::stdio::set_stderr(box w); f() }).join() {
|
|
Ok(()) => { /* fallthrough */ }
|
|
Err(value) => {
|
|
// Thread panicked without emitting a fatal diagnostic
|
|
if !value.is::<diagnostic::FatalError>() {
|
|
let mut emitter = diagnostic::EmitterWriter::stderr(diagnostic::Auto, None);
|
|
|
|
// a .span_bug or .bug call has already printed what
|
|
// it wants to print.
|
|
if !value.is::<diagnostic::ExplicitBug>() {
|
|
emitter.emit(
|
|
None,
|
|
"unexpected panic",
|
|
None,
|
|
diagnostic::Bug);
|
|
}
|
|
|
|
let xs = [
|
|
"the compiler unexpectedly panicked. this is a bug.".to_string(),
|
|
format!("we would appreciate a bug report: {}",
|
|
BUG_REPORT_URL),
|
|
"run with `RUST_BACKTRACE=1` for a backtrace".to_string(),
|
|
];
|
|
for note in &xs {
|
|
emitter.emit(None, ¬e[], None, diagnostic::Note)
|
|
}
|
|
|
|
match r.read_to_string() {
|
|
Ok(s) => println!("{}", s),
|
|
Err(e) => {
|
|
emitter.emit(None,
|
|
&format!("failed to read internal \
|
|
stderr: {}", e)[],
|
|
None,
|
|
diagnostic::Error)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Panic so the process returns a failure code, but don't pollute the
|
|
// output with some unnecessary panic messages, we've already
|
|
// printed everything that we needed to.
|
|
old_io::stdio::set_stderr(box old_io::util::NullWriter);
|
|
panic!();
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn diagnostics_registry() -> diagnostics::registry::Registry {
|
|
use syntax::diagnostics::registry::Registry;
|
|
|
|
let all_errors = Vec::new() +
|
|
rustc::diagnostics::DIAGNOSTICS.as_slice() +
|
|
rustc_typeck::diagnostics::DIAGNOSTICS.as_slice() +
|
|
rustc_resolve::diagnostics::DIAGNOSTICS.as_slice();
|
|
|
|
Registry::new(&*all_errors)
|
|
}
|
|
|
|
pub fn main() {
|
|
let args = env::args().map(|s| s.into_string().unwrap());
|
|
let result = run(args.collect());
|
|
std::env::set_exit_status(result as i32);
|
|
}
|
|
|