1056 lines
39 KiB
Rust
1056 lines
39 KiB
Rust
// Copyright 2014-2015 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", issue = "27812")]
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#![crate_type = "dylib"]
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#![crate_type = "rlib"]
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#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
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html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
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html_root_url = "https://doc.rust-lang.org/nightly/")]
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#![cfg_attr(not(stage0), deny(warnings))]
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#![feature(box_syntax)]
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#![feature(libc)]
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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(set_stdio)]
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#![feature(staged_api)]
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#![feature(question_mark)]
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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_const_eval;
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extern crate rustc_passes;
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extern crate rustc_lint;
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extern crate rustc_plugin;
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extern crate rustc_privacy;
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extern crate rustc_incremental;
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extern crate rustc_metadata;
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extern crate rustc_mir;
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extern crate rustc_resolve;
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extern crate rustc_save_analysis;
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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]
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extern crate log;
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#[macro_use]
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extern crate syntax;
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extern crate syntax_ext;
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use driver::CompileController;
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use pretty::{PpMode, UserIdentifiedItem};
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use rustc_resolve as resolve;
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use rustc_save_analysis as save;
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use rustc_trans::back::link;
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use rustc::session::{config, Session, build_session, CompileResult};
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use rustc::session::config::{Input, PrintRequest, OutputType, ErrorOutputType};
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use rustc::session::config::{get_unstable_features_setting, nightly_options};
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use rustc::middle::cstore::CrateStore;
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use rustc::lint::Lint;
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use rustc::lint;
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use rustc_metadata::loader;
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use rustc_metadata::cstore::CStore;
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use rustc::util::common::time;
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use std::cmp::max;
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use std::cmp::Ordering::Equal;
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use std::default::Default;
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use std::env;
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use std::io::{self, Read, Write};
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use std::iter::repeat;
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use std::path::PathBuf;
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use std::process;
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use std::rc::Rc;
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use std::str;
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use std::sync::{Arc, Mutex};
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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::{self, PResult};
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use syntax::errors;
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use syntax::errors::emitter::Emitter;
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use syntax::diagnostics;
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use syntax::parse::token;
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use syntax::feature_gate::{GatedCfg, UnstableFeatures};
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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 mod target_features;
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const BUG_REPORT_URL: &'static str = "https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.\
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md#bug-reports";
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#[inline]
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fn abort_msg(err_count: usize) -> String {
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match err_count {
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0 => "aborting with no errors (maybe a bug?)".to_owned(),
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1 => "aborting due to previous error".to_owned(),
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e => format!("aborting due to {} previous errors", e),
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}
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}
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pub fn abort_on_err<T>(result: Result<T, usize>, sess: &Session) -> T {
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match result {
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Err(err_count) => {
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sess.fatal(&abort_msg(err_count));
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}
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Ok(x) => x,
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}
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}
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pub fn run(args: Vec<String>) -> isize {
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monitor(move || {
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let (result, session) = run_compiler(&args, &mut RustcDefaultCalls);
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if let Err(err_count) = result {
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if err_count > 0 {
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match session {
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Some(sess) => sess.fatal(&abort_msg(err_count)),
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None => {
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let mut emitter =
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errors::emitter::BasicEmitter::stderr(errors::ColorConfig::Auto);
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emitter.emit(None, &abort_msg(err_count), None, errors::Level::Fatal);
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exit_on_err();
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}
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}
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}
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}
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});
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0
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}
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// Parse args and run the compiler. This is the primary entry point for rustc.
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// See comments on CompilerCalls below for details about the callbacks argument.
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pub fn run_compiler<'a>(args: &[String],
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callbacks: &mut CompilerCalls<'a>)
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-> (CompileResult, Option<Session>) {
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macro_rules! do_or_return {($expr: expr, $sess: expr) => {
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match $expr {
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Compilation::Stop => return (Ok(()), $sess),
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Compilation::Continue => {}
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}
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}}
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let matches = match handle_options(args) {
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Some(matches) => matches,
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None => return (Ok(()), None),
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};
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let sopts = config::build_session_options(&matches);
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if sopts.debugging_opts.debug_llvm {
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unsafe { llvm::LLVMSetDebug(1); }
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}
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let descriptions = diagnostics_registry();
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do_or_return!(callbacks.early_callback(&matches,
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&sopts,
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&descriptions,
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sopts.error_format),
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None);
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let (odir, ofile) = make_output(&matches);
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let (input, input_file_path) = match make_input(&matches.free) {
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Some((input, input_file_path)) => callbacks.some_input(input, input_file_path),
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None => match callbacks.no_input(&matches, &sopts, &odir, &ofile, &descriptions) {
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Some((input, input_file_path)) => (input, input_file_path),
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None => return (Ok(()), None),
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},
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};
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let cstore = Rc::new(CStore::new(token::get_ident_interner()));
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let sess = build_session(sopts, input_file_path, descriptions, cstore.clone());
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rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
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let mut cfg = config::build_configuration(&sess);
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target_features::add_configuration(&mut cfg, &sess);
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do_or_return!(callbacks.late_callback(&matches, &sess, &input, &odir, &ofile), Some(sess));
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// It is somewhat unfortunate that this is hardwired in - this is forced by
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// the fact that pretty_print_input requires the session by value.
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let pretty = callbacks.parse_pretty(&sess, &matches);
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if let Some((ppm, opt_uii)) = pretty {
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pretty::pretty_print_input(sess, &cstore, cfg, &input, ppm, opt_uii, ofile);
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return (Ok(()), None);
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}
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let plugins = sess.opts.debugging_opts.extra_plugins.clone();
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let control = callbacks.build_controller(&sess);
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(driver::compile_input(&sess, &cstore, cfg, &input, &odir, &ofile,
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Some(plugins), &control),
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Some(sess))
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}
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// Extract output directory and file from matches.
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fn make_output(matches: &getopts::Matches) -> (Option<PathBuf>, Option<PathBuf>) {
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let odir = matches.opt_str("out-dir").map(|o| PathBuf::from(&o));
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let ofile = matches.opt_str("o").map(|o| PathBuf::from(&o));
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(odir, ofile)
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}
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// Extract input (string or file and optional path) from matches.
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fn make_input(free_matches: &[String]) -> Option<(Input, Option<PathBuf>)> {
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if free_matches.len() == 1 {
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let ifile = &free_matches[0][..];
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if ifile == "-" {
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let mut src = String::new();
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io::stdin().read_to_string(&mut src).unwrap();
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Some((Input::Str { name: driver::anon_src(), input: src },
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None))
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} else {
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Some((Input::File(PathBuf::from(ifile)),
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Some(PathBuf::from(ifile))))
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}
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} else {
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None
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}
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}
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// Whether to stop or continue compilation.
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#[derive(Copy, Clone, Debug, Eq, PartialEq)]
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pub enum Compilation {
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Stop,
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Continue,
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}
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impl Compilation {
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pub fn and_then<F: FnOnce() -> Compilation>(self, next: F) -> Compilation {
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match self {
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Compilation::Stop => Compilation::Stop,
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Compilation::Continue => next(),
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}
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}
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}
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// A trait for customising the compilation process. Offers a number of hooks for
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// executing custom code or customising input.
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pub trait CompilerCalls<'a> {
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// Hook for a callback early in the process of handling arguments. This will
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// be called straight after options have been parsed but before anything
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// else (e.g., selecting input and output).
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fn early_callback(&mut self,
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_: &getopts::Matches,
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_: &config::Options,
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_: &diagnostics::registry::Registry,
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_: ErrorOutputType)
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-> Compilation {
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Compilation::Continue
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}
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// Hook for a callback late in the process of handling arguments. This will
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// be called just before actual compilation starts (and before build_controller
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// is called), after all arguments etc. have been completely handled.
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fn late_callback(&mut self,
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_: &getopts::Matches,
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_: &Session,
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_: &Input,
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_: &Option<PathBuf>,
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_: &Option<PathBuf>)
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-> Compilation {
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Compilation::Continue
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}
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// Called after we extract the input from the arguments. Gives the implementer
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// an opportunity to change the inputs or to add some custom input handling.
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// The default behaviour is to simply pass through the inputs.
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fn some_input(&mut self,
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input: Input,
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input_path: Option<PathBuf>)
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-> (Input, Option<PathBuf>) {
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(input, input_path)
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}
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// Called after we extract the input from the arguments if there is no valid
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// input. Gives the implementer an opportunity to supply alternate input (by
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// returning a Some value) or to add custom behaviour for this error such as
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// emitting error messages. Returning None will cause compilation to stop
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// at this point.
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fn no_input(&mut self,
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_: &getopts::Matches,
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_: &config::Options,
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_: &Option<PathBuf>,
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_: &Option<PathBuf>,
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_: &diagnostics::registry::Registry)
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-> Option<(Input, Option<PathBuf>)> {
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None
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}
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// Parse pretty printing information from the arguments. The implementer can
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// choose to ignore this (the default will return None) which will skip pretty
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// printing. If you do want to pretty print, it is recommended to use the
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// implementation of this method from RustcDefaultCalls.
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// FIXME, this is a terrible bit of API. Parsing of pretty printing stuff
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// should be done as part of the framework and the implementor should customise
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// handling of it. However, that is not possible atm because pretty printing
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// essentially goes off and takes another path through the compiler which
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// means the session is either moved or not depending on what parse_pretty
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// returns (we could fix this by cloning, but it's another hack). The proper
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// solution is to handle pretty printing as if it were a compiler extension,
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// extending CompileController to make this work (see for example the treatment
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// of save-analysis in RustcDefaultCalls::build_controller).
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fn parse_pretty(&mut self,
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_sess: &Session,
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_matches: &getopts::Matches)
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-> Option<(PpMode, Option<UserIdentifiedItem>)> {
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None
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}
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// Create a CompilController struct for controlling the behaviour of
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// compilation.
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fn build_controller(&mut self, &Session) -> CompileController<'a>;
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}
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// CompilerCalls instance for a regular rustc build.
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#[derive(Copy, Clone)]
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pub struct RustcDefaultCalls;
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fn handle_explain(code: &str,
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descriptions: &diagnostics::registry::Registry,
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output: ErrorOutputType) {
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let normalised = if code.starts_with("E") {
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code.to_string()
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} else {
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format!("E{0:0>4}", code)
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};
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match descriptions.find_description(&normalised) {
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Some(ref description) => {
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// Slice off the leading newline and print.
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print!("{}", &description[1..]);
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}
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None => {
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early_error(output, &format!("no extended information for {}", code));
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}
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}
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}
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fn check_cfg(sopts: &config::Options,
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output: ErrorOutputType) {
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let mut emitter: Box<Emitter> = match output {
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config::ErrorOutputType::HumanReadable(color_config) => {
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Box::new(errors::emitter::BasicEmitter::stderr(color_config))
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}
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config::ErrorOutputType::Json => Box::new(errors::json::JsonEmitter::basic()),
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};
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let mut saw_invalid_predicate = false;
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for item in sopts.cfg.iter() {
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match item.node {
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ast::MetaItemKind::List(ref pred, _) => {
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saw_invalid_predicate = true;
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emitter.emit(None,
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&format!("invalid predicate in --cfg command line argument: `{}`",
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pred),
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None,
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errors::Level::Fatal);
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}
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_ => {},
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}
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}
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if saw_invalid_predicate {
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panic!(errors::FatalError);
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}
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}
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impl<'a> CompilerCalls<'a> for RustcDefaultCalls {
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fn early_callback(&mut self,
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matches: &getopts::Matches,
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sopts: &config::Options,
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descriptions: &diagnostics::registry::Registry,
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output: ErrorOutputType)
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-> Compilation {
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if let Some(ref code) = matches.opt_str("explain") {
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handle_explain(code, descriptions, output);
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return Compilation::Stop;
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}
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check_cfg(sopts, output);
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Compilation::Continue
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}
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fn no_input(&mut self,
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matches: &getopts::Matches,
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sopts: &config::Options,
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odir: &Option<PathBuf>,
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ofile: &Option<PathBuf>,
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descriptions: &diagnostics::registry::Registry)
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-> Option<(Input, Option<PathBuf>)> {
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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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rustc_lint::register_builtins(&mut ls, None);
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describe_lints(&ls, false);
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return None;
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}
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let cstore = Rc::new(CStore::new(token::get_ident_interner()));
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let sess = build_session(sopts.clone(), None, descriptions.clone(),
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cstore.clone());
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rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
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let should_stop = RustcDefaultCalls::print_crate_info(&sess, None, odir, ofile);
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if should_stop == Compilation::Stop {
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return None;
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}
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early_error(sopts.error_format, "no input filename given");
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}
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1 => panic!("make_input should have provided valid inputs"),
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_ => early_error(sopts.error_format, "multiple input filenames provided"),
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}
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None
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}
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fn parse_pretty(&mut self,
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sess: &Session,
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matches: &getopts::Matches)
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-> Option<(PpMode, Option<UserIdentifiedItem>)> {
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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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if pretty.is_none() && sess.unstable_options() {
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matches.opt_str("unpretty").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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}
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fn late_callback(&mut self,
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matches: &getopts::Matches,
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sess: &Session,
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input: &Input,
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odir: &Option<PathBuf>,
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ofile: &Option<PathBuf>)
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-> Compilation {
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RustcDefaultCalls::print_crate_info(sess, Some(input), odir, ofile)
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.and_then(|| RustcDefaultCalls::list_metadata(sess, matches, input))
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}
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fn build_controller(&mut self, sess: &Session) -> CompileController<'a> {
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let mut control = CompileController::basic();
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if sess.opts.parse_only || sess.opts.debugging_opts.show_span.is_some() ||
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sess.opts.debugging_opts.ast_json_noexpand {
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control.after_parse.stop = Compilation::Stop;
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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 = Compilation::Stop;
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}
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if sess.opts.no_trans {
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control.after_analysis.stop = Compilation::Stop;
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}
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if !sess.opts.output_types.keys().any(|&i| i == OutputType::Exe) {
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control.after_llvm.stop = Compilation::Stop;
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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", || {
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save::process_crate(state.tcx.unwrap(),
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state.lcx.unwrap(),
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state.krate.unwrap(),
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state.analysis.unwrap(),
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state.crate_name.unwrap(),
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state.out_dir)
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});
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};
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control.after_analysis.run_callback_on_error = true;
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control.make_glob_map = resolve::MakeGlobMap::Yes;
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}
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control
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}
|
|
}
|
|
|
|
impl RustcDefaultCalls {
|
|
pub fn list_metadata(sess: &Session, matches: &getopts::Matches, input: &Input) -> Compilation {
|
|
let r = matches.opt_strs("Z");
|
|
if r.contains(&("ls".to_string())) {
|
|
match input {
|
|
&Input::File(ref ifile) => {
|
|
let path = &(*ifile);
|
|
let mut v = Vec::new();
|
|
loader::list_file_metadata(&sess.target.target, path, &mut v)
|
|
.unwrap();
|
|
println!("{}", String::from_utf8(v).unwrap());
|
|
}
|
|
&Input::Str { .. } => {
|
|
early_error(ErrorOutputType::default(), "cannot list metadata for stdin");
|
|
}
|
|
}
|
|
return Compilation::Stop;
|
|
}
|
|
|
|
return Compilation::Continue;
|
|
}
|
|
|
|
|
|
fn print_crate_info(sess: &Session,
|
|
input: Option<&Input>,
|
|
odir: &Option<PathBuf>,
|
|
ofile: &Option<PathBuf>)
|
|
-> Compilation {
|
|
if sess.opts.prints.is_empty() {
|
|
return Compilation::Continue;
|
|
}
|
|
|
|
let attrs = match input {
|
|
None => None,
|
|
Some(input) => {
|
|
let result = parse_crate_attrs(sess, input);
|
|
match result {
|
|
Ok(attrs) => Some(attrs),
|
|
Err(mut parse_error) => {
|
|
parse_error.emit();
|
|
return Compilation::Stop;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
for req in &sess.opts.prints {
|
|
match *req {
|
|
PrintRequest::TargetList => {
|
|
let mut targets = rustc_back::target::TARGETS.to_vec();
|
|
targets.sort();
|
|
println!("{}", targets.join("\n"));
|
|
},
|
|
PrintRequest::Sysroot => println!("{}", sess.sysroot().display()),
|
|
PrintRequest::FileNames |
|
|
PrintRequest::CrateName => {
|
|
let input = match input {
|
|
Some(input) => input,
|
|
None => early_error(ErrorOutputType::default(), "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);
|
|
for &style in &crate_types {
|
|
let fname = link::filename_for_input(sess, style, &id, &t_outputs);
|
|
println!("{}",
|
|
fname.file_name()
|
|
.unwrap()
|
|
.to_string_lossy());
|
|
}
|
|
}
|
|
PrintRequest::Cfg => {
|
|
let mut cfg = config::build_configuration(&sess);
|
|
target_features::add_configuration(&mut cfg, &sess);
|
|
|
|
let allow_unstable_cfg = match get_unstable_features_setting() {
|
|
UnstableFeatures::Disallow => false,
|
|
_ => true,
|
|
};
|
|
|
|
for cfg in cfg {
|
|
if !allow_unstable_cfg && GatedCfg::gate(&*cfg).is_some() {
|
|
continue;
|
|
}
|
|
match cfg.node {
|
|
ast::MetaItemKind::Word(ref word) => println!("{}", word),
|
|
ast::MetaItemKind::NameValue(ref name, ref value) => {
|
|
println!("{}=\"{}\"", name, match value.node {
|
|
ast::LitKind::Str(ref s, _) => s,
|
|
_ => continue,
|
|
});
|
|
}
|
|
// Right now there are not and should not be any
|
|
// MetaItemKind::List items in the configuration returned by
|
|
// `build_configuration`.
|
|
ast::MetaItemKind::List(..) => {
|
|
panic!("MetaItemKind::List encountered in default cfg")
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return Compilation::Stop;
|
|
}
|
|
}
|
|
|
|
/// Returns a version string such as "0.12.0-dev".
|
|
pub fn release_str() -> Option<&'static str> {
|
|
option_env!("CFG_RELEASE")
|
|
}
|
|
|
|
/// Returns the full SHA1 hash of HEAD of the Git repo from which rustc was built.
|
|
pub fn commit_hash_str() -> Option<&'static str> {
|
|
option_env!("CFG_VER_HASH")
|
|
}
|
|
|
|
/// Returns the "commit date" of HEAD of the Git repo from which rustc was built as a static string.
|
|
pub fn commit_date_str() -> Option<&'static str> {
|
|
option_env!("CFG_VER_DATE")
|
|
}
|
|
|
|
/// Prints version information
|
|
pub fn version(binary: &str, matches: &getopts::Matches) {
|
|
let verbose = matches.opt_present("verbose");
|
|
|
|
println!("{} {}",
|
|
binary,
|
|
option_env!("CFG_VERSION").unwrap_or("unknown version"));
|
|
if verbose {
|
|
fn unw(x: Option<&str>) -> &str {
|
|
x.unwrap_or("unknown")
|
|
}
|
|
println!("binary: {}", binary);
|
|
println!("commit-hash: {}", unw(commit_hash_str()));
|
|
println!("commit-date: {}", unw(commit_date_str()));
|
|
println!("host: {}", config::host_triple());
|
|
println!("release: {}", unw(release_str()));
|
|
}
|
|
}
|
|
|
|
fn usage(verbose: bool, include_unstable_options: bool) {
|
|
let groups = if verbose {
|
|
config::rustc_optgroups()
|
|
} else {
|
|
config::rustc_short_optgroups()
|
|
};
|
|
let groups: Vec<_> = groups.into_iter()
|
|
.filter(|x| include_unstable_options || x.is_stable())
|
|
.map(|x| x.opt_group)
|
|
.collect();
|
|
let message = format!("Usage: rustc [OPTIONS] INPUT");
|
|
let extra_help = if verbose {
|
|
""
|
|
} else {
|
|
"\n --help -v Print the full set of options rustc accepts"
|
|
};
|
|
println!("{}\nAdditional help:
|
|
-C help Print codegen options
|
|
-W help \
|
|
Print 'lint' options and default settings
|
|
-Z help Print internal \
|
|
options for debugging rustc{}\n",
|
|
getopts::usage(&message, &groups),
|
|
extra_help);
|
|
}
|
|
|
|
fn describe_lints(lint_store: &lint::LintStore, loaded_plugins: bool) {
|
|
println!("
|
|
Available lint options:
|
|
-W <foo> Warn about <foo>
|
|
-A <foo> \
|
|
Allow <foo>
|
|
-D <foo> Deny <foo>
|
|
-F <foo> Forbid <foo> \
|
|
(deny, and deny all overrides)
|
|
|
|
");
|
|
|
|
fn sort_lints(lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
|
|
let mut lints: Vec<_> = lints.into_iter().map(|(x, _)| x).collect();
|
|
lints.sort_by(|x: &&Lint, y: &&Lint| {
|
|
match x.default_level.cmp(&y.default_level) {
|
|
// The sort doesn't case-fold but it's doubtful we care.
|
|
Equal => x.name.cmp(y.name),
|
|
r => r,
|
|
}
|
|
});
|
|
lints
|
|
}
|
|
|
|
fn sort_lint_groups(lints: Vec<(&'static str, Vec<lint::LintId>, bool)>)
|
|
-> Vec<(&'static str, Vec<lint::LintId>)> {
|
|
let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
|
|
lints.sort_by(|&(x, _): &(&'static str, Vec<lint::LintId>),
|
|
&(y, _): &(&'static str, Vec<lint::LintId>)| {
|
|
x.cmp(y)
|
|
});
|
|
lints
|
|
}
|
|
|
|
let (plugin, builtin): (Vec<_>, _) = lint_store.get_lints()
|
|
.iter()
|
|
.cloned()
|
|
.partition(|&(_, p)| p);
|
|
let plugin = sort_lints(plugin);
|
|
let builtin = sort_lints(builtin);
|
|
|
|
let (plugin_groups, builtin_groups): (Vec<_>, _) = lint_store.get_lint_groups()
|
|
.iter()
|
|
.cloned()
|
|
.partition(|&(_, _, p)| p);
|
|
let plugin_groups = sort_lint_groups(plugin_groups);
|
|
let builtin_groups = sort_lint_groups(builtin_groups);
|
|
|
|
let max_name_len = plugin.iter()
|
|
.chain(&builtin)
|
|
.map(|&s| s.name.chars().count())
|
|
.max()
|
|
.unwrap_or(0);
|
|
let padded = |x: &str| {
|
|
let mut s = repeat(" ")
|
|
.take(max_name_len - x.chars().count())
|
|
.collect::<String>();
|
|
s.push_str(x);
|
|
s
|
|
};
|
|
|
|
println!("Lint checks provided by rustc:\n");
|
|
println!(" {} {:7.7} {}", padded("name"), "default", "meaning");
|
|
println!(" {} {:7.7} {}", padded("----"), "-------", "-------");
|
|
|
|
let print_lints = |lints: Vec<&Lint>| {
|
|
for lint in lints {
|
|
let name = lint.name_lower().replace("_", "-");
|
|
println!(" {} {:7.7} {}",
|
|
padded(&name[..]),
|
|
lint.default_level.as_str(),
|
|
lint.desc);
|
|
}
|
|
println!("\n");
|
|
};
|
|
|
|
print_lints(builtin);
|
|
|
|
|
|
|
|
let max_name_len = max("warnings".len(),
|
|
plugin_groups.iter()
|
|
.chain(&builtin_groups)
|
|
.map(|&(s, _)| s.chars().count())
|
|
.max()
|
|
.unwrap_or(0));
|
|
|
|
let padded = |x: &str| {
|
|
let mut s = repeat(" ")
|
|
.take(max_name_len - x.chars().count())
|
|
.collect::<String>();
|
|
s.push_str(x);
|
|
s
|
|
};
|
|
|
|
println!("Lint groups provided by rustc:\n");
|
|
println!(" {} {}", padded("name"), "sub-lints");
|
|
println!(" {} {}", padded("----"), "---------");
|
|
println!(" {} {}", padded("warnings"), "all built-in lints");
|
|
|
|
let print_lint_groups = |lints: Vec<(&'static str, Vec<lint::LintId>)>| {
|
|
for (name, to) in lints {
|
|
let name = name.to_lowercase().replace("_", "-");
|
|
let desc = to.into_iter()
|
|
.map(|x| x.as_str().replace("_", "-"))
|
|
.collect::<Vec<String>>()
|
|
.join(", ");
|
|
println!(" {} {}", padded(&name[..]), desc);
|
|
}
|
|
println!("\n");
|
|
};
|
|
|
|
print_lint_groups(builtin_groups);
|
|
|
|
match (loaded_plugins, plugin.len(), plugin_groups.len()) {
|
|
(false, 0, _) | (false, _, 0) => {
|
|
println!("Compiler plugins can provide additional lints and lint groups. To see a \
|
|
listing of these, re-run `rustc -W help` with a crate filename.");
|
|
}
|
|
(false, _, _) => panic!("didn't load lint plugins but got them anyway!"),
|
|
(true, 0, 0) => println!("This crate does not load any lint plugins or lint groups."),
|
|
(true, l, g) => {
|
|
if l > 0 {
|
|
println!("Lint checks provided by plugins loaded by this crate:\n");
|
|
print_lints(plugin);
|
|
}
|
|
if g > 0 {
|
|
println!("Lint groups provided by plugins loaded by this crate:\n");
|
|
print_lint_groups(plugin_groups);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn describe_debug_flags() {
|
|
println!("\nAvailable debug options:\n");
|
|
print_flag_list("-Z", config::DB_OPTIONS);
|
|
}
|
|
|
|
fn describe_codegen_flags() {
|
|
println!("\nAvailable codegen options:\n");
|
|
print_flag_list("-C", config::CG_OPTIONS);
|
|
}
|
|
|
|
fn print_flag_list<T>(cmdline_opt: &str,
|
|
flag_list: &[(&'static str, T, Option<&'static str>, &'static str)]) {
|
|
let max_len = flag_list.iter()
|
|
.map(|&(name, _, opt_type_desc, _)| {
|
|
let extra_len = match opt_type_desc {
|
|
Some(..) => 4,
|
|
None => 0,
|
|
};
|
|
name.chars().count() + extra_len
|
|
})
|
|
.max()
|
|
.unwrap_or(0);
|
|
|
|
for &(name, _, opt_type_desc, desc) in flag_list {
|
|
let (width, extra) = match opt_type_desc {
|
|
Some(..) => (max_len - 4, "=val"),
|
|
None => (max_len, ""),
|
|
};
|
|
println!(" {} {:>width$}{} -- {}",
|
|
cmdline_opt,
|
|
name.replace("_", "-"),
|
|
extra,
|
|
desc,
|
|
width = width);
|
|
}
|
|
}
|
|
|
|
/// Process command line options. Emits messages as appropriate. If compilation
|
|
/// should continue, returns a getopts::Matches object parsed from args,
|
|
/// otherwise returns None.
|
|
///
|
|
/// The compiler's handling of options is a little complication as it ties into
|
|
/// our stability story, and it's even *more* complicated by historical
|
|
/// accidents. The current intention of each compiler option is to have one of
|
|
/// three modes:
|
|
///
|
|
/// 1. An option is stable and can be used everywhere.
|
|
/// 2. An option is unstable, but was historically allowed on the stable
|
|
/// channel.
|
|
/// 3. An option is unstable, and can only be used on nightly.
|
|
///
|
|
/// Like unstable library and language features, however, unstable options have
|
|
/// always required a form of "opt in" to indicate that you're using them. This
|
|
/// provides the easy ability to scan a code base to check to see if anything
|
|
/// unstable is being used. Currently, this "opt in" is the `-Z` "zed" flag.
|
|
///
|
|
/// All options behind `-Z` are considered unstable by default. Other top-level
|
|
/// options can also be considered unstable, and they were unlocked through the
|
|
/// `-Z unstable-options` flag. Note that `-Z` remains to be the root of
|
|
/// instability in both cases, though.
|
|
///
|
|
/// So with all that in mind, the comments below have some more detail about the
|
|
/// contortions done here to get things to work out correctly.
|
|
pub fn handle_options(args: &[String]) -> Option<getopts::Matches> {
|
|
// Throw away the first argument, the name of the binary
|
|
let args = &args[1..];
|
|
|
|
if args.is_empty() {
|
|
// user did not write `-v` nor `-Z unstable-options`, so do not
|
|
// include that extra information.
|
|
usage(false, false);
|
|
return None;
|
|
}
|
|
|
|
// Parse with *all* options defined in the compiler, we don't worry about
|
|
// option stability here we just want to parse as much as possible.
|
|
let all_groups: Vec<getopts::OptGroup> = config::rustc_optgroups()
|
|
.into_iter()
|
|
.map(|x| x.opt_group)
|
|
.collect();
|
|
let matches = match getopts::getopts(&args[..], &all_groups) {
|
|
Ok(m) => m,
|
|
Err(f) => early_error(ErrorOutputType::default(), &f.to_string()),
|
|
};
|
|
|
|
// For all options we just parsed, we check a few aspects:
|
|
//
|
|
// * If the option is stable, we're all good
|
|
// * If the option wasn't passed, we're all good
|
|
// * If `-Z unstable-options` wasn't passed (and we're not a -Z option
|
|
// ourselves), then we require the `-Z unstable-options` flag to unlock
|
|
// this option that was passed.
|
|
// * If we're a nightly compiler, then unstable options are now unlocked, so
|
|
// we're good to go.
|
|
// * Otherwise, if we're a truly unstable option then we generate an error
|
|
// (unstable option being used on stable)
|
|
// * If we're a historically stable-but-should-be-unstable option then we
|
|
// emit a warning that we're going to turn this into an error soon.
|
|
nightly_options::check_nightly_options(&matches, &config::rustc_optgroups());
|
|
|
|
if matches.opt_present("h") || matches.opt_present("help") {
|
|
// Only show unstable options in --help if we *really* accept unstable
|
|
// options, which catches the case where we got `-Z unstable-options` on
|
|
// the stable channel of Rust which was accidentally allowed
|
|
// historically.
|
|
usage(matches.opt_present("verbose"),
|
|
nightly_options::is_unstable_enabled(&matches));
|
|
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 parse_crate_attrs<'a>(sess: &'a Session, input: &Input) -> PResult<'a, Vec<ast::Attribute>> {
|
|
match *input {
|
|
Input::File(ref ifile) => {
|
|
parse::parse_crate_attrs_from_file(ifile, Vec::new(), &sess.parse_sess)
|
|
}
|
|
Input::Str { ref name, ref input } => {
|
|
parse::parse_crate_attrs_from_source_str(name.clone(),
|
|
input.clone(),
|
|
Vec::new(),
|
|
&sess.parse_sess)
|
|
}
|
|
}
|
|
}
|
|
|
|
/// 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 + 'static>(f: F) {
|
|
const STACK_SIZE: usize = 8 * 1024 * 1024; // 8MB
|
|
|
|
struct Sink(Arc<Mutex<Vec<u8>>>);
|
|
impl Write for Sink {
|
|
fn write(&mut self, data: &[u8]) -> io::Result<usize> {
|
|
Write::write(&mut *self.0.lock().unwrap(), data)
|
|
}
|
|
fn flush(&mut self) -> io::Result<()> {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
let data = Arc::new(Mutex::new(Vec::new()));
|
|
let err = Sink(data.clone());
|
|
|
|
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_os("RUST_MIN_STACK").is_none() {
|
|
cfg = cfg.stack_size(STACK_SIZE);
|
|
}
|
|
|
|
let thread = cfg.spawn(move || {
|
|
io::set_panic(box err);
|
|
f()
|
|
});
|
|
|
|
if let Err(value) = thread.unwrap().join() {
|
|
// Thread panicked without emitting a fatal diagnostic
|
|
if !value.is::<errors::FatalError>() {
|
|
let mut emitter = errors::emitter::BasicEmitter::stderr(errors::ColorConfig::Auto);
|
|
|
|
// a .span_bug or .bug call has already printed what
|
|
// it wants to print.
|
|
if !value.is::<errors::ExplicitBug>() {
|
|
emitter.emit(None, "unexpected panic", None, errors::Level::Bug);
|
|
}
|
|
|
|
let xs = ["the compiler unexpectedly panicked. this is a bug.".to_string(),
|
|
format!("we would appreciate a bug report: {}", BUG_REPORT_URL)];
|
|
for note in &xs {
|
|
emitter.emit(None, ¬e[..], None, errors::Level::Note)
|
|
}
|
|
if match env::var_os("RUST_BACKTRACE") {
|
|
Some(val) => &val != "0",
|
|
None => false,
|
|
} {
|
|
emitter.emit(None,
|
|
"run with `RUST_BACKTRACE=1` for a backtrace",
|
|
None,
|
|
errors::Level::Note);
|
|
}
|
|
|
|
println!("{}", str::from_utf8(&data.lock().unwrap()).unwrap());
|
|
}
|
|
|
|
exit_on_err();
|
|
}
|
|
}
|
|
|
|
fn exit_on_err() -> ! {
|
|
// 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::set_panic(box io::sink());
|
|
panic!();
|
|
}
|
|
|
|
pub fn diagnostics_registry() -> diagnostics::registry::Registry {
|
|
use syntax::diagnostics::registry::Registry;
|
|
|
|
let mut all_errors = Vec::new();
|
|
all_errors.extend_from_slice(&rustc::DIAGNOSTICS);
|
|
all_errors.extend_from_slice(&rustc_typeck::DIAGNOSTICS);
|
|
all_errors.extend_from_slice(&rustc_borrowck::DIAGNOSTICS);
|
|
all_errors.extend_from_slice(&rustc_resolve::DIAGNOSTICS);
|
|
all_errors.extend_from_slice(&rustc_privacy::DIAGNOSTICS);
|
|
all_errors.extend_from_slice(&rustc_trans::DIAGNOSTICS);
|
|
all_errors.extend_from_slice(&rustc_const_eval::DIAGNOSTICS);
|
|
|
|
Registry::new(&all_errors)
|
|
}
|
|
|
|
pub fn main() {
|
|
let result = run(env::args().collect());
|
|
process::exit(result as i32);
|
|
}
|