544 lines
18 KiB
Rust
544 lines
18 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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#![experimental]
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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(default_type_params, globs, import_shadowing, macro_rules, phase, quote)]
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#![feature(slicing_syntax, unsafe_destructor)]
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#![feature(rustc_diagnostic_macros)]
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#![feature(unboxed_closures)]
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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_trans;
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extern crate rustc_typeck;
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#[phase(plugin, link)] extern crate log;
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#[phase(plugin, link)] extern crate syntax;
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extern crate serialize;
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extern crate "rustc_llvm" as llvm;
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pub use syntax::diagnostic;
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use rustc_trans::back::link;
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use rustc::session::{config, Session, build_session};
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use rustc::session::config::Input;
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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::DIAGNOSTICS;
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use std::any::AnyRefExt;
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use std::io;
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use std::os;
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use std::task::TaskBuilder;
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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(proc() run_compiler(args.as_slice()));
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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::Registry::new(&DIAGNOSTICS);
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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.as_slice()) {
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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).as_slice());
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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 (input, input_file_path) = match matches.free.len() {
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0u => {
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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 sess.debugging_opt(config::PRINT_SYSROOT) {
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println!("{}", sess.sysroot().display());
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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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1u => {
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let ifile = matches.free[0].as_slice();
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if ifile == "-" {
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let contents = 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 sess = build_session(sopts, input_file_path, descriptions);
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let cfg = config::build_configuration(&sess);
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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 pretty = matches.opt_default("pretty", "normal").map(|a| {
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pretty::parse_pretty(&sess, a.as_slice())
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});
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match pretty {
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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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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 = 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("can not 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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if print_crate_info(&sess, &input, &odir, &ofile) {
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return;
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}
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driver::compile_input(sess, cfg, &input, &odir, &ofile, None);
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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) -> Option<String> {
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let verbose = match matches.opt_str("version").as_ref().map(|s| s.as_slice()) {
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None => false,
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Some("verbose") => true,
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Some(s) => return Some(format!("Unrecognized argument: {}", s))
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};
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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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None
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}
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fn usage() {
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let message = format!("Usage: rustc [OPTIONS] INPUT");
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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.as_slice(),
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config::optgroups().as_slice()));
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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) = lint_store.get_lints().partitioned(|&(_, 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) = lint_store.get_lint_groups().partitioned(|&(_, _, 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(max_name_len - x.char_len());
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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.into_iter() {
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let name = lint.name_lower().replace("_", "-");
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println!(" {} {:7.7} {}",
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padded(name.as_slice()), 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(max_name_len - x.char_len());
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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.into_iter() {
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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.as_slice()), 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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let r = config::debugging_opts_map();
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for tuple in r.iter() {
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match *tuple {
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(ref name, ref desc, _) => {
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println!(" -Z {:>20} -- {}", *name, *desc);
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}
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}
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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.iter() {
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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).unwrap();
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if args.is_empty() {
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usage();
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return None;
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}
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let matches =
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match getopts::getopts(args.as_slice(), config::optgroups().as_slice()) {
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Ok(m) => m,
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Err(f) => {
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early_error(f.to_string().as_slice());
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}
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};
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if matches.opt_present("h") || matches.opt_present("help") {
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usage();
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return None;
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}
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// Don't handle -W help here, because we might first load plugins.
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let r = matches.opt_strs("Z");
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if r.iter().any(|x| *x == "help") {
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describe_debug_flags();
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return None;
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}
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let cg_flags = matches.opt_strs("C");
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if cg_flags.iter().any(|x| *x == "help") {
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describe_codegen_flags();
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return None;
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}
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if cg_flags.contains(&"passes=list".to_string()) {
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unsafe { ::llvm::LLVMRustPrintPasses(); }
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return None;
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}
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if matches.opt_present("version") {
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match version("rustc", &matches) {
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Some(err) => early_error(err.as_slice()),
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None => return None
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}
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}
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Some(matches)
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}
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fn print_crate_info(sess: &Session,
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input: &Input,
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odir: &Option<Path>,
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ofile: &Option<Path>)
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-> bool {
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let (crate_name, crate_file_name) = sess.opts.print_metas;
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// these nasty nested conditions are to avoid doing extra work
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if crate_name || crate_file_name {
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let attrs = parse_crate_attrs(sess, input);
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let t_outputs = driver::build_output_filenames(input,
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odir,
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ofile,
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attrs.as_slice(),
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sess);
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let id = link::find_crate_name(Some(sess), attrs.as_slice(), input);
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if crate_name {
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println!("{}", id);
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}
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if crate_file_name {
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let crate_types = driver::collect_crate_types(sess, attrs.as_slice());
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let metadata = driver::collect_crate_metadata(sess, attrs.as_slice());
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*sess.crate_metadata.borrow_mut() = metadata;
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for &style in crate_types.iter() {
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let fname = link::filename_for_input(sess, style, id.as_slice(),
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&t_outputs.with_extension(""));
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println!("{}", fname.filename_display());
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}
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}
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true
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} else {
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false
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}
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}
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fn parse_crate_attrs(sess: &Session, input: &Input) ->
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Vec<ast::Attribute> {
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let result = match *input {
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Input::File(ref ifile) => {
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parse::parse_crate_attrs_from_file(ifile,
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Vec::new(),
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&sess.parse_sess)
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}
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Input::Str(ref src) => {
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parse::parse_crate_attrs_from_source_str(
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driver::anon_src().to_string(),
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src.to_string(),
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Vec::new(),
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&sess.parse_sess)
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}
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};
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result.into_iter().collect()
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}
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pub fn list_metadata(sess: &Session, path: &Path,
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out: &mut io::Writer) -> io::IoResult<()> {
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metadata::loader::list_file_metadata(sess.target.target.options.is_like_osx, path, out)
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}
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/// Run a procedure which will detect panics in the compiler and print nicer
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/// error messages rather than just failing the test.
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///
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/// The diagnostic emitter yielded to the procedure should be used for reporting
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/// errors of the compiler.
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pub fn monitor(f: proc():Send) {
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static STACK_SIZE: uint = 32000000; // 32MB
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let (tx, rx) = channel();
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let w = io::ChanWriter::new(tx);
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let mut r = io::ChanReader::new(rx);
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let mut task = TaskBuilder::new().named("rustc").stderr(box w);
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// FIXME: Hacks on hacks. If the env is trying to override the stack size
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// then *don't* set it explicitly.
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if os::getenv("RUST_MIN_STACK").is_none() {
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task = task.stack_size(STACK_SIZE);
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}
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match task.try(f) {
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Ok(()) => { /* fallthrough */ }
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Err(value) => {
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// Task panicked without emitting a fatal diagnostic
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if !value.is::<diagnostic::FatalError>() {
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let mut emitter = diagnostic::EmitterWriter::stderr(diagnostic::Auto, None);
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|
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// a .span_bug or .bug call has already printed what
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// it wants to print.
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if !value.is::<diagnostic::ExplicitBug>() {
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emitter.emit(
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None,
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|
"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.iter() {
|
|
emitter.emit(None, note.as_slice(), None, diagnostic::Note)
|
|
}
|
|
|
|
match r.read_to_string() {
|
|
Ok(s) => println!("{}", s),
|
|
Err(e) => {
|
|
emitter.emit(None,
|
|
format!("failed to read internal \
|
|
stderr: {}",
|
|
e).as_slice(),
|
|
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.
|
|
io::stdio::set_stderr(box io::util::NullWriter);
|
|
panic!();
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn main() {
|
|
let args = std::os::args();
|
|
let result = run(args);
|
|
std::os::set_exit_status(result);
|
|
}
|
|
|