blob: 31151e10a5a55c9d2b8be45aaf6e097047ae20db [file] [log] [blame]
// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! The Rust compiler.
//!
//! # Note
//!
//! This API is completely unstable and subject to change.
#![crate_name = "rustc_driver"]
#![unstable(feature = "rustc_private", issue = "27812")]
#![crate_type = "dylib"]
#![crate_type = "rlib"]
#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
html_root_url = "https://doc.rust-lang.org/nightly/")]
#![feature(box_syntax)]
#![feature(libc)]
#![feature(quote)]
#![feature(rustc_diagnostic_macros)]
#![feature(rustc_private)]
#![feature(set_stdio)]
#![feature(staged_api)]
extern crate arena;
extern crate flate;
extern crate getopts;
extern crate graphviz;
extern crate libc;
extern crate rustc;
extern crate rustc_back;
extern crate rustc_borrowck;
extern crate rustc_passes;
extern crate rustc_front;
extern crate rustc_lint;
extern crate rustc_plugin;
extern crate rustc_privacy;
extern crate rustc_metadata;
extern crate rustc_mir;
extern crate rustc_resolve;
extern crate rustc_trans;
extern crate rustc_typeck;
extern crate serialize;
extern crate rustc_llvm as llvm;
#[macro_use]
extern crate log;
#[macro_use]
extern crate syntax;
extern crate syntax_ext;
use driver::CompileController;
use pretty::{PpMode, UserIdentifiedItem};
use rustc_resolve as resolve;
use rustc_trans::back::link;
use rustc_trans::save;
use rustc::session::{config, Session, build_session};
use rustc::session::config::{Input, PrintRequest, OutputType, ErrorOutputType};
use rustc::middle::cstore::CrateStore;
use rustc::lint::Lint;
use rustc::lint;
use rustc_metadata::loader;
use rustc_metadata::cstore::CStore;
use rustc::util::common::time;
use std::cmp::max;
use std::cmp::Ordering::Equal;
use std::default::Default;
use std::env;
use std::io::{self, Read, Write};
use std::iter::repeat;
use std::path::PathBuf;
use std::process;
use std::rc::Rc;
use std::str;
use std::sync::{Arc, Mutex};
use std::thread;
use rustc::session::early_error;
use syntax::ast;
use syntax::parse;
use syntax::errors;
use syntax::errors::emitter::Emitter;
use syntax::diagnostics;
use syntax::parse::token;
#[cfg(test)]
pub mod test;
pub mod driver;
pub mod pretty;
pub mod target_features;
const BUG_REPORT_URL: &'static str = "https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.\
md#bug-reports";
pub fn run(args: Vec<String>) -> isize {
monitor(move || run_compiler(&args, &mut RustcDefaultCalls));
0
}
// Parse args and run the compiler. This is the primary entry point for rustc.
// See comments on CompilerCalls below for details about the callbacks argument.
pub fn run_compiler<'a>(args: &[String], callbacks: &mut CompilerCalls<'a>) {
macro_rules! do_or_return {($expr: expr) => {
match $expr {
Compilation::Stop => return,
Compilation::Continue => {}
}
}}
let matches = match handle_options(args.to_vec()) {
Some(matches) => matches,
None => return,
};
let sopts = config::build_session_options(&matches);
let descriptions = diagnostics_registry();
do_or_return!(callbacks.early_callback(&matches, &descriptions, sopts.error_format));
let (odir, ofile) = make_output(&matches);
let (input, input_file_path) = match make_input(&matches.free) {
Some((input, input_file_path)) => callbacks.some_input(input, input_file_path),
None => match callbacks.no_input(&matches, &sopts, &odir, &ofile, &descriptions) {
Some((input, input_file_path)) => (input, input_file_path),
None => return,
},
};
let cstore = Rc::new(CStore::new(token::get_ident_interner()));
let sess = build_session(sopts, input_file_path, descriptions,
cstore.clone());
rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
let mut cfg = config::build_configuration(&sess);
target_features::add_configuration(&mut cfg, &sess);
do_or_return!(callbacks.late_callback(&matches, &sess, &input, &odir, &ofile));
// It is somewhat unfortunate that this is hardwired in - this is forced by
// the fact that pretty_print_input requires the session by value.
let pretty = callbacks.parse_pretty(&sess, &matches);
match pretty {
Some((ppm, opt_uii)) => {
pretty::pretty_print_input(sess, &cstore, cfg, &input, ppm, opt_uii, ofile);
return;
}
None => {
// continue
}
}
let plugins = sess.opts.debugging_opts.extra_plugins.clone();
let control = callbacks.build_controller(&sess);
driver::compile_input(sess, &cstore, cfg, &input, &odir, &ofile,
Some(plugins), control);
}
// Extract output directory and file from matches.
fn make_output(matches: &getopts::Matches) -> (Option<PathBuf>, Option<PathBuf>) {
let odir = matches.opt_str("out-dir").map(|o| PathBuf::from(&o));
let ofile = matches.opt_str("o").map(|o| PathBuf::from(&o));
(odir, ofile)
}
// Extract input (string or file and optional path) from matches.
fn make_input(free_matches: &[String]) -> Option<(Input, Option<PathBuf>)> {
if free_matches.len() == 1 {
let ifile = &free_matches[0][..];
if ifile == "-" {
let mut src = String::new();
io::stdin().read_to_string(&mut src).unwrap();
Some((Input::Str(src), None))
} else {
Some((Input::File(PathBuf::from(ifile)),
Some(PathBuf::from(ifile))))
}
} else {
None
}
}
// Whether to stop or continue compilation.
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub enum Compilation {
Stop,
Continue,
}
impl Compilation {
pub fn and_then<F: FnOnce() -> Compilation>(self, next: F) -> Compilation {
match self {
Compilation::Stop => Compilation::Stop,
Compilation::Continue => next(),
}
}
}
// A trait for customising the compilation process. Offers a number of hooks for
// executing custom code or customising input.
pub trait CompilerCalls<'a> {
// Hook for a callback early in the process of handling arguments. This will
// be called straight after options have been parsed but before anything
// else (e.g., selecting input and output).
fn early_callback(&mut self,
_: &getopts::Matches,
_: &diagnostics::registry::Registry,
_: ErrorOutputType)
-> Compilation {
Compilation::Continue
}
// Hook for a callback late in the process of handling arguments. This will
// be called just before actual compilation starts (and before build_controller
// is called), after all arguments etc. have been completely handled.
fn late_callback(&mut self,
_: &getopts::Matches,
_: &Session,
_: &Input,
_: &Option<PathBuf>,
_: &Option<PathBuf>)
-> Compilation {
Compilation::Continue
}
// Called after we extract the input from the arguments. Gives the implementer
// an opportunity to change the inputs or to add some custom input handling.
// The default behaviour is to simply pass through the inputs.
fn some_input(&mut self,
input: Input,
input_path: Option<PathBuf>)
-> (Input, Option<PathBuf>) {
(input, input_path)
}
// Called after we extract the input from the arguments if there is no valid
// input. Gives the implementer an opportunity to supply alternate input (by
// returning a Some value) or to add custom behaviour for this error such as
// emitting error messages. Returning None will cause compilation to stop
// at this point.
fn no_input(&mut self,
_: &getopts::Matches,
_: &config::Options,
_: &Option<PathBuf>,
_: &Option<PathBuf>,
_: &diagnostics::registry::Registry)
-> Option<(Input, Option<PathBuf>)> {
None
}
// Parse pretty printing information from the arguments. The implementer can
// choose to ignore this (the default will return None) which will skip pretty
// printing. If you do want to pretty print, it is recommended to use the
// implementation of this method from RustcDefaultCalls.
// FIXME, this is a terrible bit of API. Parsing of pretty printing stuff
// should be done as part of the framework and the implementor should customise
// handling of it. However, that is not possible atm because pretty printing
// essentially goes off and takes another path through the compiler which
// means the session is either moved or not depending on what parse_pretty
// returns (we could fix this by cloning, but it's another hack). The proper
// solution is to handle pretty printing as if it were a compiler extension,
// extending CompileController to make this work (see for example the treatment
// of save-analysis in RustcDefaultCalls::build_controller).
fn parse_pretty(&mut self,
_sess: &Session,
_matches: &getopts::Matches)
-> Option<(PpMode, Option<UserIdentifiedItem>)> {
None
}
// Create a CompilController struct for controlling the behaviour of
// compilation.
fn build_controller(&mut self, &Session) -> CompileController<'a>;
}
// CompilerCalls instance for a regular rustc build.
#[derive(Copy, Clone)]
pub struct RustcDefaultCalls;
impl<'a> CompilerCalls<'a> for RustcDefaultCalls {
fn early_callback(&mut self,
matches: &getopts::Matches,
descriptions: &diagnostics::registry::Registry,
output: ErrorOutputType)
-> Compilation {
match matches.opt_str("explain") {
Some(ref code) => {
let normalised = if !code.starts_with("E") {
format!("E{0:0>4}", code)
} else {
code.to_string()
};
match descriptions.find_description(&normalised) {
Some(ref description) => {
// Slice off the leading newline and print.
print!("{}", &description[1..]);
}
None => {
early_error(output, &format!("no extended information for {}", code));
}
}
return Compilation::Stop;
}
None => (),
}
return Compilation::Continue;
}
fn no_input(&mut self,
matches: &getopts::Matches,
sopts: &config::Options,
odir: &Option<PathBuf>,
ofile: &Option<PathBuf>,
descriptions: &diagnostics::registry::Registry)
-> Option<(Input, Option<PathBuf>)> {
match matches.free.len() {
0 => {
if sopts.describe_lints {
let mut ls = lint::LintStore::new();
rustc_lint::register_builtins(&mut ls, None);
describe_lints(&ls, false);
return None;
}
let cstore = Rc::new(CStore::new(token::get_ident_interner()));
let sess = build_session(sopts.clone(), None, descriptions.clone(),
cstore.clone());
rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
let should_stop = RustcDefaultCalls::print_crate_info(&sess, None, odir, ofile);
if should_stop == Compilation::Stop {
return None;
}
early_error(sopts.error_format, "no input filename given");
}
1 => panic!("make_input should have provided valid inputs"),
_ => early_error(sopts.error_format, "multiple input filenames provided"),
}
None
}
fn parse_pretty(&mut self,
sess: &Session,
matches: &getopts::Matches)
-> Option<(PpMode, Option<UserIdentifiedItem>)> {
let pretty = if sess.opts.debugging_opts.unstable_options {
matches.opt_default("pretty", "normal").map(|a| {
// stable pretty-print variants only
pretty::parse_pretty(sess, &a, false)
})
} else {
None
};
if pretty.is_none() && sess.unstable_options() {
matches.opt_str("unpretty").map(|a| {
// extended with unstable pretty-print variants
pretty::parse_pretty(sess, &a, true)
})
} else {
pretty
}
}
fn late_callback(&mut self,
matches: &getopts::Matches,
sess: &Session,
input: &Input,
odir: &Option<PathBuf>,
ofile: &Option<PathBuf>)
-> Compilation {
RustcDefaultCalls::print_crate_info(sess, Some(input), odir, ofile)
.and_then(|| RustcDefaultCalls::list_metadata(sess, matches, input))
}
fn build_controller(&mut self, sess: &Session) -> CompileController<'a> {
let mut control = CompileController::basic();
if sess.opts.parse_only || sess.opts.debugging_opts.show_span.is_some() ||
sess.opts.debugging_opts.ast_json_noexpand {
control.after_parse.stop = Compilation::Stop;
}
if sess.opts.no_analysis || sess.opts.debugging_opts.ast_json {
control.after_write_deps.stop = Compilation::Stop;
}
if sess.opts.no_trans {
control.after_analysis.stop = Compilation::Stop;
}
if !sess.opts.output_types.keys().any(|&i| i == OutputType::Exe) {
control.after_llvm.stop = Compilation::Stop;
}
if sess.opts.debugging_opts.save_analysis {
control.after_analysis.callback = box |state| {
time(state.session.time_passes(), "save analysis", || {
save::process_crate(state.tcx.unwrap(),
state.lcx.unwrap(),
state.krate.unwrap(),
state.analysis.unwrap(),
state.crate_name.unwrap(),
state.out_dir)
});
};
control.make_glob_map = resolve::MakeGlobMap::Yes;
}
control
}
}
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 = input.map(|input| parse_crate_attrs(sess, input));
for req in &sess.opts.prints {
match *req {
PrintRequest::Sysroot => println!("{}", sess.sysroot().display()),
PrintRequest::FileNames |
PrintRequest::CrateName => {
let input = match input {
Some(input) => input,
None => early_error(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);
let metadata = driver::collect_crate_metadata(sess, attrs);
*sess.crate_metadata.borrow_mut() = metadata;
for &style in &crate_types {
let fname = link::filename_for_input(sess, style, &id, &t_outputs);
println!("{}",
fname.file_name()
.unwrap()
.to_string_lossy());
}
}
}
}
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.
pub fn handle_options(mut args: Vec<String>) -> Option<getopts::Matches> {
// Throw away the first argument, the name of the binary
let _binary = args.remove(0);
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;
}
fn allows_unstable_options(matches: &getopts::Matches) -> bool {
let r = matches.opt_strs("Z");
r.iter().any(|x| *x == "unstable-options")
}
fn parse_all_options(args: &Vec<String>) -> getopts::Matches {
let all_groups: Vec<getopts::OptGroup> = config::rustc_optgroups()
.into_iter()
.map(|x| x.opt_group)
.collect();
match getopts::getopts(&args[..], &all_groups) {
Ok(m) => {
if !allows_unstable_options(&m) {
// If -Z unstable-options was not specified, verify that
// no unstable options were present.
for opt in config::rustc_optgroups().into_iter().filter(|x| !x.is_stable()) {
let opt_name = if !opt.opt_group.long_name.is_empty() {
&opt.opt_group.long_name
} else {
&opt.opt_group.short_name
};
if m.opt_present(opt_name) {
early_error(ErrorOutputType::default(),
&format!("use of unstable option '{}' requires -Z \
unstable-options",
opt_name));
}
}
}
m
}
Err(f) => early_error(ErrorOutputType::default(), &f.to_string()),
}
}
// As a speed optimization, first try to parse the command-line using just
// the stable options.
let matches = match getopts::getopts(&args[..], &config::optgroups()) {
Ok(ref m) if allows_unstable_options(m) => {
// If -Z unstable-options was specified, redo parsing with the
// unstable options to ensure that unstable options are defined
// in the returned getopts::Matches.
parse_all_options(&args)
}
Ok(m) => m,
Err(_) => {
// redo option parsing, including unstable options this time,
// in anticipation that the mishandled option was one of the
// unstable ones.
parse_all_options(&args)
}
};
if matches.opt_present("h") || matches.opt_present("help") {
usage(matches.opt_present("verbose"),
allows_unstable_options(&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(sess: &Session, input: &Input) -> Vec<ast::Attribute> {
let result = match *input {
Input::File(ref ifile) => {
parse::parse_crate_attrs_from_file(ifile, Vec::new(), &sess.parse_sess)
}
Input::Str(ref src) => {
parse::parse_crate_attrs_from_source_str(driver::anon_src().to_string(),
src.to_string(),
Vec::new(),
&sess.parse_sess)
}
};
result.into_iter().collect()
}
/// 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);
}
match cfg.spawn(move || {
io::set_panic(box err);
f()
})
.unwrap()
.join() {
Ok(()) => {
// fallthrough
}
Err(value) => {
// 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, &note[..], None, errors::Level::Note)
}
if let None = env::var_os("RUST_BACKTRACE") {
emitter.emit(None,
"run with `RUST_BACKTRACE=1` for a backtrace",
None,
errors::Level::Note);
}
println!("{}", str::from_utf8(&data.lock().unwrap()).unwrap());
}
// 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);
Registry::new(&*all_errors)
}
pub fn main() {
let result = run(env::args().collect());
process::exit(result as i32);
}