445 lines
14 KiB
Rust
445 lines
14 KiB
Rust
// Copyright 2012 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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pub use syntax::diagnostic;
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use back::link;
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use driver::driver::{Input, FileInput, StrInput};
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use driver::session::{Session, build_session};
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use lint::Lint;
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use lint;
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use metadata;
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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::str;
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use std::task::TaskBuilder;
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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 getopts;
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pub mod driver;
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pub mod session;
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pub mod config;
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pub fn main_args(args: &[String]) -> int {
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let owned_args = args.to_owned();
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monitor(proc() run_compiler(owned_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(Vec::from_slice(args)) {
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Some(matches) => matches,
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None => return
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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);
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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.get(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 = str::from_utf8(contents.as_slice()).unwrap()
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.to_string();
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(StrInput(src), None)
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} else {
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(FileInput(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);
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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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parse_pretty(&sess, a.as_slice())
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});
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match pretty {
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Some::<PpMode>(ppm) => {
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driver::pretty_print_input(sess, cfg, &input, ppm, ofile);
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return;
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}
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None::<PpMode> => {/* 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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FileInput(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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StrInput(_) => {
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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);
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}
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pub fn version(command: &str) {
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let vers = match option_env!("CFG_VERSION") {
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Some(vers) => vers,
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None => "unknown version"
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};
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println!("{} {}", command, vers);
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println!("host: {}", driver::host_triple());
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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) {
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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.move_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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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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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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// FIXME (#7043): We should use the width in character cells rather than
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// the number of codepoints.
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let max_name_len = builtin.iter()
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.map(|&s| s.name.char_len())
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.max().unwrap_or(0);
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let padded = |x: &str| {
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" ".repeat(max_name_len - x.char_len()).append(x)
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};
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println!("Lint checks provided by rustc:\n");
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println!(" {} {:7.7s} {}", padded("name"), "default", "meaning");
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println!(" {} {:7.7s} {}", padded("----"), "-------", "-------");
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let print_lints = |lints: Vec<&Lint>| {
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for lint in lints.move_iter() {
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let name = lint.name.replace("_", "-");
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println!(" {} {:7.7s} {}",
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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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// Describe lint plugins here once they exist.
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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 {:>20s} -- {}", *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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let mut cg = config::basic_codegen_options();
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for &(name, parser, desc) in config::CG_OPTIONS.iter() {
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// we invoke the parser function on `None` to see if this option needs
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// an argument or not.
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let (width, extra) = if parser(&mut cg, None) {
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(25, "")
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} else {
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(21, "=val")
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};
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println!(" -C {:>width$s}{} -- {}", 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.shift().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_str().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.as_slice() == "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.as_slice() == "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 { ::lib::llvm::llvm::LLVMRustPrintPasses(); }
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return None;
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}
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if matches.opt_present("v") || matches.opt_present("version") {
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version("rustc");
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return None;
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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_id, 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_id || 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_id(attrs.as_slice(),
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t_outputs.out_filestem.as_slice());
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if crate_id {
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println!("{}", id.to_str());
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}
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if crate_name {
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println!("{}", id.name);
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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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for &style in crate_types.iter() {
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let fname = link::filename_for_input(sess, style, &id,
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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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pub enum PpMode {
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PpmNormal,
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PpmExpanded,
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PpmTyped,
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PpmIdentified,
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PpmExpandedIdentified,
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PpmFlowGraph(ast::NodeId),
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}
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pub fn parse_pretty(sess: &Session, name: &str) -> PpMode {
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let mut split = name.splitn('=', 1);
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let first = split.next().unwrap();
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let opt_second = split.next();
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match (opt_second, first) {
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(None, "normal") => PpmNormal,
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(None, "expanded") => PpmExpanded,
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(None, "typed") => PpmTyped,
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(None, "expanded,identified") => PpmExpandedIdentified,
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(None, "identified") => PpmIdentified,
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(arg, "flowgraph") => {
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match arg.and_then(from_str) {
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Some(id) => PpmFlowGraph(id),
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None => {
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sess.fatal(format!("`pretty flowgraph=<nodeid>` needs \
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an integer <nodeid>; got {}",
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arg.unwrap_or("nothing")).as_slice())
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}
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}
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}
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_ => {
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sess.fatal(format!(
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"argument to `pretty` must be one of `normal`, \
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`expanded`, `flowgraph=<nodeid>`, `typed`, `identified`, \
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or `expanded,identified`; got {}", name).as_slice());
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}
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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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FileInput(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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StrInput(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.move_iter().collect()
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}
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pub fn early_error(msg: &str) -> ! {
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let mut emitter = diagnostic::EmitterWriter::stderr(diagnostic::Auto);
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emitter.emit(None, msg, diagnostic::Fatal);
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fail!(diagnostic::FatalError);
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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.targ_cfg.os, path, out)
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}
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/// Run a procedure which will detect failures 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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fn monitor(f: proc():Send) {
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// FIXME: This is a hack for newsched since it doesn't support split stacks.
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// rustc needs a lot of stack! When optimizations are disabled, it needs
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// even *more* stack than usual as well.
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#[cfg(rtopt)]
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static STACK_SIZE: uint = 6000000; // 6MB
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#[cfg(not(rtopt))]
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static STACK_SIZE: uint = 20000000; // 20MB
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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 failed 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);
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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 failure",
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diagnostic::Bug);
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}
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let xs = [
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"the compiler hit an unexpected failure path. this is a bug.".to_string(),
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format!("we would appreciate a bug report: {}",
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BUG_REPORT_URL),
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"run with `RUST_BACKTRACE=1` for a backtrace".to_string(),
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];
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for note in xs.iter() {
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emitter.emit(None, note.as_slice(), diagnostic::Note)
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}
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match r.read_to_str() {
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Ok(s) => println!("{}", s),
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Err(e) => {
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emitter.emit(None,
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format!("failed to read internal \
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stderr: {}",
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e).as_slice(),
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diagnostic::Error)
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}
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}
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}
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// Fail so the process returns a failure code, but don't pollute the
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// output with some unnecessary failure messages, we've already
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// printed everything that we needed to.
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io::stdio::set_stderr(box io::util::NullWriter);
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fail!();
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}
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}
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}
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