1285 lines
45 KiB
Rust
1285 lines
45 KiB
Rust
//! 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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#![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
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#![feature(box_syntax)]
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#![cfg_attr(unix, feature(libc))]
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#![feature(nll)]
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#![feature(set_stdio)]
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#![feature(no_debug)]
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#![feature(integer_atomics)]
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#![recursion_limit="256"]
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pub extern crate getopts;
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#[cfg(unix)]
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extern crate libc;
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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 lazy_static;
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pub extern crate rustc_plugin_impl as plugin;
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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_save_analysis::DumpHandler;
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use rustc::session::{config, Session, DiagnosticOutput};
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use rustc::session::config::{Input, PrintRequest, ErrorOutputType, OutputType};
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use rustc::session::config::nightly_options;
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use rustc::session::{early_error, early_warn};
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use rustc::lint::Lint;
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use rustc::lint;
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use rustc::hir::def_id::LOCAL_CRATE;
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use rustc::ty::TyCtxt;
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use rustc::util::common::{set_time_depth, time, print_time_passes_entry, ErrorReported};
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use rustc_metadata::locator;
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use rustc_metadata::cstore::CStore;
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use rustc_codegen_utils::codegen_backend::CodegenBackend;
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use rustc_interface::interface;
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use rustc_interface::util::get_codegen_sysroot;
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use rustc_data_structures::sync::SeqCst;
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use rustc_serialize::json::ToJson;
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use std::borrow::Cow;
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use std::cmp::max;
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use std::default::Default;
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use std::env;
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use std::ffi::OsString;
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use std::io::{self, Read, Write};
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use std::mem;
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use std::panic::{self, catch_unwind};
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use std::path::PathBuf;
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use std::process::{self, Command, Stdio};
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use std::str;
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use std::time::Instant;
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use syntax::ast;
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use syntax::source_map::FileLoader;
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use syntax::feature_gate::{GatedCfg, UnstableFeatures};
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use syntax::parse::{self, PResult};
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use syntax::symbol::sym;
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use syntax_pos::{DUMMY_SP, FileName};
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pub mod pretty;
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mod args;
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/// Exit status code used for successful compilation and help output.
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pub const EXIT_SUCCESS: i32 = 0;
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/// Exit status code used for compilation failures and invalid flags.
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pub const EXIT_FAILURE: i32 = 1;
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const BUG_REPORT_URL: &str = "https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.\
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md#bug-reports";
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const ICE_REPORT_COMPILER_FLAGS: &[&str] = &["Z", "C", "crate-type"];
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const ICE_REPORT_COMPILER_FLAGS_EXCLUDE: &[&str] = &["metadata", "extra-filename"];
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const ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE: &[&str] = &["incremental"];
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pub fn source_name(input: &Input) -> FileName {
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match *input {
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Input::File(ref ifile) => ifile.clone().into(),
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Input::Str { ref name, .. } => name.clone(),
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}
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}
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pub fn abort_on_err<T>(result: Result<T, ErrorReported>, sess: &Session) -> T {
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match result {
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Err(..) => {
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sess.abort_if_errors();
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panic!("error reported but abort_if_errors didn't abort???");
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}
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Ok(x) => x,
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}
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}
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pub trait Callbacks {
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/// Called before creating the compiler instance
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fn config(&mut self, _config: &mut interface::Config) {}
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/// Called after parsing. Return value instructs the compiler whether to
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/// continue the compilation afterwards (defaults to `Compilation::Continue`)
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fn after_parsing(&mut self, _compiler: &interface::Compiler) -> Compilation {
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Compilation::Continue
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}
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/// Called after expansion. Return value instructs the compiler whether to
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/// continue the compilation afterwards (defaults to `Compilation::Continue`)
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fn after_expansion(&mut self, _compiler: &interface::Compiler) -> Compilation {
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Compilation::Continue
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}
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/// Called after analysis. Return value instructs the compiler whether to
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/// continue the compilation afterwards (defaults to `Compilation::Continue`)
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fn after_analysis(&mut self, _compiler: &interface::Compiler) -> Compilation {
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Compilation::Continue
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}
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}
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pub struct DefaultCallbacks;
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impl Callbacks for DefaultCallbacks {}
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#[derive(Default)]
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pub struct TimePassesCallbacks {
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time_passes: bool,
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}
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impl Callbacks for TimePassesCallbacks {
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fn config(&mut self, config: &mut interface::Config) {
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// If a --prints=... option has been given, we don't print the "total"
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// time because it will mess up the --prints output. See #64339.
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self.time_passes =
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config.opts.prints.is_empty() &&
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(config.opts.debugging_opts.time_passes || config.opts.debugging_opts.time);
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}
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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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// The FileLoader provides a way to load files from sources other than the file system.
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pub fn run_compiler(
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at_args: &[String],
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callbacks: &mut (dyn Callbacks + Send),
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file_loader: Option<Box<dyn FileLoader + Send + Sync>>,
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emitter: Option<Box<dyn Write + Send>>
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) -> interface::Result<()> {
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let mut args = Vec::new();
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for arg in at_args {
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match args::arg_expand(arg.clone()) {
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Ok(arg) => args.extend(arg),
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Err(err) => early_error(ErrorOutputType::default(),
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&format!("Failed to load argument file: {}", err)),
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}
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}
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let diagnostic_output = emitter.map(|emitter| DiagnosticOutput::Raw(emitter))
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.unwrap_or(DiagnosticOutput::Default);
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let matches = match handle_options(&args) {
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Some(matches) => matches,
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None => return Ok(()),
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};
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let (sopts, cfg) = config::build_session_options_and_crate_config(&matches);
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let mut dummy_config = |sopts, cfg, diagnostic_output| {
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let mut config = interface::Config {
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opts: sopts,
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crate_cfg: cfg,
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input: Input::File(PathBuf::new()),
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input_path: None,
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output_file: None,
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output_dir: None,
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file_loader: None,
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diagnostic_output,
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stderr: None,
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crate_name: None,
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lint_caps: Default::default(),
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};
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callbacks.config(&mut config);
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config
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};
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if let Some(ref code) = matches.opt_str("explain") {
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handle_explain(code, sopts.error_format);
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return Ok(());
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}
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let (odir, ofile) = make_output(&matches);
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let (input, input_file_path, input_err) = match make_input(&matches.free) {
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Some(v) => v,
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None => {
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match matches.free.len() {
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0 => {
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let config = dummy_config(sopts, cfg, diagnostic_output);
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interface::run_compiler(config, |compiler| {
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let sopts = &compiler.session().opts;
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if sopts.describe_lints {
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describe_lints(
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compiler.session(),
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&*compiler.session().lint_store.borrow(),
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false
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);
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return;
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}
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let should_stop = RustcDefaultCalls::print_crate_info(
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&***compiler.codegen_backend(),
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compiler.session(),
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None,
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&odir,
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&ofile
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);
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if should_stop == Compilation::Stop {
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return;
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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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return Ok(());
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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, &format!(
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"multiple input filenames provided (first two filenames are `{}` and `{}`)",
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matches.free[0],
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matches.free[1],
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)),
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}
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}
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};
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if let Some(err) = input_err {
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// Immediately stop compilation if there was an issue reading
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// the input (for example if the input stream is not UTF-8).
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interface::run_compiler(dummy_config(sopts, cfg, diagnostic_output), |compiler| {
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compiler.session().err(&err.to_string());
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});
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return Err(ErrorReported);
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}
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let mut config = interface::Config {
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opts: sopts,
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crate_cfg: cfg,
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input,
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input_path: input_file_path,
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output_file: ofile,
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output_dir: odir,
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file_loader,
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diagnostic_output,
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stderr: None,
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crate_name: None,
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lint_caps: Default::default(),
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};
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callbacks.config(&mut config);
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interface::run_compiler(config, |compiler| {
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let sess = compiler.session();
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let should_stop = RustcDefaultCalls::print_crate_info(
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&***compiler.codegen_backend(),
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sess,
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Some(compiler.input()),
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compiler.output_dir(),
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compiler.output_file(),
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).and_then(|| RustcDefaultCalls::list_metadata(
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sess,
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compiler.cstore(),
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&matches,
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compiler.input()
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));
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if should_stop == Compilation::Stop {
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return sess.compile_status();
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}
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let pretty_info = parse_pretty(sess, &matches);
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compiler.parse()?;
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if let Some((ppm, opt_uii)) = pretty_info {
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if ppm.needs_ast_map(&opt_uii) {
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pretty::visit_crate(sess, &mut compiler.parse()?.peek_mut(), ppm);
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compiler.global_ctxt()?.peek_mut().enter(|tcx| {
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let expanded_crate = compiler.expansion()?.take().0;
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pretty::print_after_hir_lowering(
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tcx,
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compiler.input(),
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&expanded_crate,
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ppm,
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opt_uii.clone(),
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compiler.output_file().as_ref().map(|p| &**p),
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);
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Ok(())
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})?;
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} else {
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let mut krate = compiler.parse()?.take();
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pretty::visit_crate(sess, &mut krate, ppm);
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pretty::print_after_parsing(
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sess,
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&compiler.input(),
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&krate,
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ppm,
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compiler.output_file().as_ref().map(|p| &**p),
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);
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}
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return sess.compile_status();
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}
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if callbacks.after_parsing(compiler) == Compilation::Stop {
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return sess.compile_status();
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}
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if sess.opts.debugging_opts.parse_only ||
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sess.opts.debugging_opts.show_span.is_some() ||
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sess.opts.debugging_opts.ast_json_noexpand {
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return sess.compile_status();
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}
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compiler.register_plugins()?;
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// Lint plugins are registered; now we can process command line flags.
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if sess.opts.describe_lints {
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describe_lints(&sess, &sess.lint_store.borrow(), true);
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return sess.compile_status();
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}
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compiler.expansion()?;
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if callbacks.after_expansion(compiler) == Compilation::Stop {
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return sess.compile_status();
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}
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compiler.prepare_outputs()?;
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if sess.opts.output_types.contains_key(&OutputType::DepInfo)
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&& sess.opts.output_types.len() == 1
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{
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return sess.compile_status();
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}
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compiler.global_ctxt()?;
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if sess.opts.debugging_opts.no_analysis ||
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sess.opts.debugging_opts.ast_json {
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return sess.compile_status();
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}
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if sess.opts.debugging_opts.save_analysis {
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let expanded_crate = &compiler.expansion()?.peek().0;
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let crate_name = compiler.crate_name()?.peek().clone();
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compiler.global_ctxt()?.peek_mut().enter(|tcx| {
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let result = tcx.analysis(LOCAL_CRATE);
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time(sess, "save analysis", || {
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save::process_crate(
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tcx,
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&expanded_crate,
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&crate_name,
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&compiler.input(),
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None,
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DumpHandler::new(compiler.output_dir().as_ref().map(|p| &**p), &crate_name)
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)
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});
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result
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// AST will be dropped *after* the `after_analysis` callback
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// (needed by the RLS)
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})?;
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} else {
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// Drop AST after creating GlobalCtxt to free memory
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mem::drop(compiler.expansion()?.take());
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}
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compiler.global_ctxt()?.peek_mut().enter(|tcx| tcx.analysis(LOCAL_CRATE))?;
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if callbacks.after_analysis(compiler) == Compilation::Stop {
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return sess.compile_status();
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}
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if sess.opts.debugging_opts.save_analysis {
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mem::drop(compiler.expansion()?.take());
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}
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compiler.ongoing_codegen()?;
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// Drop GlobalCtxt after starting codegen to free memory
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mem::drop(compiler.global_ctxt()?.take());
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if sess.opts.debugging_opts.print_type_sizes {
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sess.code_stats.borrow().print_type_sizes();
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}
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compiler.link()?;
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if sess.opts.debugging_opts.perf_stats {
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sess.print_perf_stats();
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}
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if sess.print_fuel_crate.is_some() {
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eprintln!("Fuel used by {}: {}",
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sess.print_fuel_crate.as_ref().unwrap(),
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sess.print_fuel.load(SeqCst));
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}
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Ok(())
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})
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}
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#[cfg(unix)]
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pub fn set_sigpipe_handler() {
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unsafe {
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// Set the SIGPIPE signal handler, so that an EPIPE
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// will cause rustc to terminate, as expected.
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assert_ne!(libc::signal(libc::SIGPIPE, libc::SIG_DFL), libc::SIG_ERR);
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}
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}
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#[cfg(windows)]
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pub fn set_sigpipe_handler() {}
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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>, Option<io::Error>)> {
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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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let err = if io::stdin().read_to_string(&mut src).is_err() {
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Some(io::Error::new(io::ErrorKind::InvalidData,
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"couldn't read from stdin, as it did not contain valid UTF-8"))
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} else {
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None
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};
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if let Ok(path) = env::var("UNSTABLE_RUSTDOC_TEST_PATH") {
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let line = env::var("UNSTABLE_RUSTDOC_TEST_LINE").
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expect("when UNSTABLE_RUSTDOC_TEST_PATH is set \
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UNSTABLE_RUSTDOC_TEST_LINE also needs to be set");
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let line = isize::from_str_radix(&line, 10).
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expect("UNSTABLE_RUSTDOC_TEST_LINE needs to be an number");
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let file_name = FileName::doc_test_source_code(PathBuf::from(path), line);
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return Some((Input::Str { name: file_name, input: src }, None, err));
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}
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Some((Input::Str { name: FileName::anon_source_code(&src), input: src },
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None, err))
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} else {
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Some((Input::File(PathBuf::from(ifile)),
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Some(PathBuf::from(ifile)), None))
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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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|
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fn parse_pretty(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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|
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if pretty.is_none() {
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sess.opts.debugging_opts.unpretty.as_ref().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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|
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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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|
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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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|
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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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|
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// FIXME remove these and use winapi 0.3 instead
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// Duplicates: bootstrap/compile.rs, librustc_errors/emitter.rs
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#[cfg(unix)]
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fn stdout_isatty() -> bool {
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unsafe { libc::isatty(libc::STDOUT_FILENO) != 0 }
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}
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|
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#[cfg(windows)]
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fn stdout_isatty() -> bool {
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type DWORD = u32;
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type BOOL = i32;
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type HANDLE = *mut u8;
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type LPDWORD = *mut u32;
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const STD_OUTPUT_HANDLE: DWORD = -11i32 as DWORD;
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extern "system" {
|
|
fn GetStdHandle(which: DWORD) -> HANDLE;
|
|
fn GetConsoleMode(hConsoleHandle: HANDLE, lpMode: LPDWORD) -> BOOL;
|
|
}
|
|
unsafe {
|
|
let handle = GetStdHandle(STD_OUTPUT_HANDLE);
|
|
let mut out = 0;
|
|
GetConsoleMode(handle, &mut out) != 0
|
|
}
|
|
}
|
|
|
|
fn handle_explain(code: &str,
|
|
output: ErrorOutputType) {
|
|
let descriptions = rustc_interface::util::diagnostics_registry();
|
|
let normalised = if code.starts_with("E") {
|
|
code.to_string()
|
|
} else {
|
|
format!("E{0:0>4}", code)
|
|
};
|
|
match descriptions.find_description(&normalised) {
|
|
Some(ref description) => {
|
|
let mut is_in_code_block = false;
|
|
let mut text = String::new();
|
|
|
|
// Slice off the leading newline and print.
|
|
for line in description[1..].lines() {
|
|
let indent_level = line.find(|c: char| !c.is_whitespace())
|
|
.unwrap_or_else(|| line.len());
|
|
let dedented_line = &line[indent_level..];
|
|
if dedented_line.starts_with("```") {
|
|
is_in_code_block = !is_in_code_block;
|
|
text.push_str(&line[..(indent_level+3)]);
|
|
} else if is_in_code_block && dedented_line.starts_with("# ") {
|
|
continue;
|
|
} else {
|
|
text.push_str(line);
|
|
}
|
|
text.push('\n');
|
|
}
|
|
|
|
if stdout_isatty() {
|
|
show_content_with_pager(&text);
|
|
} else {
|
|
print!("{}", text);
|
|
}
|
|
}
|
|
None => {
|
|
early_error(output, &format!("no extended information for {}", code));
|
|
}
|
|
}
|
|
}
|
|
|
|
fn show_content_with_pager(content: &String) {
|
|
let pager_name = env::var_os("PAGER").unwrap_or_else(|| if cfg!(windows) {
|
|
OsString::from("more.com")
|
|
} else {
|
|
OsString::from("less")
|
|
});
|
|
|
|
let mut fallback_to_println = false;
|
|
|
|
match Command::new(pager_name).stdin(Stdio::piped()).spawn() {
|
|
Ok(mut pager) => {
|
|
if let Some(pipe) = pager.stdin.as_mut() {
|
|
if pipe.write_all(content.as_bytes()).is_err() {
|
|
fallback_to_println = true;
|
|
}
|
|
}
|
|
|
|
if pager.wait().is_err() {
|
|
fallback_to_println = true;
|
|
}
|
|
}
|
|
Err(_) => {
|
|
fallback_to_println = true;
|
|
}
|
|
}
|
|
|
|
// If pager fails for whatever reason, we should still print the content
|
|
// to standard output
|
|
if fallback_to_println {
|
|
print!("{}", content);
|
|
}
|
|
}
|
|
|
|
impl RustcDefaultCalls {
|
|
pub fn list_metadata(sess: &Session,
|
|
cstore: &CStore,
|
|
matches: &getopts::Matches,
|
|
input: &Input)
|
|
-> Compilation {
|
|
let r = matches.opt_strs("Z");
|
|
if r.iter().any(|s| *s == "ls") {
|
|
match input {
|
|
&Input::File(ref ifile) => {
|
|
let path = &(*ifile);
|
|
let mut v = Vec::new();
|
|
locator::list_file_metadata(&sess.target.target,
|
|
path,
|
|
&*cstore.metadata_loader,
|
|
&mut v)
|
|
.unwrap();
|
|
println!("{}", String::from_utf8(v).unwrap());
|
|
}
|
|
&Input::Str { .. } => {
|
|
early_error(ErrorOutputType::default(), "cannot list metadata for stdin");
|
|
}
|
|
}
|
|
return Compilation::Stop;
|
|
}
|
|
|
|
Compilation::Continue
|
|
}
|
|
|
|
|
|
fn print_crate_info(codegen_backend: &dyn CodegenBackend,
|
|
sess: &Session,
|
|
input: Option<&Input>,
|
|
odir: &Option<PathBuf>,
|
|
ofile: &Option<PathBuf>)
|
|
-> Compilation {
|
|
use rustc::session::config::PrintRequest::*;
|
|
// PrintRequest::NativeStaticLibs is special - printed during linking
|
|
// (empty iterator returns true)
|
|
if sess.opts.prints.iter().all(|&p| p == PrintRequest::NativeStaticLibs) {
|
|
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 {
|
|
TargetList => {
|
|
let mut targets = rustc_target::spec::get_targets().collect::<Vec<String>>();
|
|
targets.sort();
|
|
println!("{}", targets.join("\n"));
|
|
},
|
|
Sysroot => println!("{}", sess.sysroot.display()),
|
|
TargetSpec => println!("{}", sess.target.target.to_json().pretty()),
|
|
FileNames | CrateName => {
|
|
let input = input.unwrap_or_else(||
|
|
early_error(ErrorOutputType::default(), "no input file provided"));
|
|
let attrs = attrs.as_ref().unwrap();
|
|
let t_outputs = rustc_interface::util::build_output_filenames(
|
|
input,
|
|
odir,
|
|
ofile,
|
|
attrs,
|
|
sess
|
|
);
|
|
let id = rustc_codegen_utils::link::find_crate_name(Some(sess), attrs, input);
|
|
if *req == PrintRequest::CrateName {
|
|
println!("{}", id);
|
|
continue;
|
|
}
|
|
let crate_types = rustc_interface::util::collect_crate_types(sess, attrs);
|
|
for &style in &crate_types {
|
|
let fname = rustc_codegen_utils::link::filename_for_input(
|
|
sess,
|
|
style,
|
|
&id,
|
|
&t_outputs
|
|
);
|
|
println!("{}", fname.file_name().unwrap().to_string_lossy());
|
|
}
|
|
}
|
|
Cfg => {
|
|
let allow_unstable_cfg = UnstableFeatures::from_environment()
|
|
.is_nightly_build();
|
|
|
|
let mut cfgs = sess.parse_sess.config.iter().filter_map(|&(name, ref value)| {
|
|
let gated_cfg = GatedCfg::gate(&ast::MetaItem {
|
|
path: ast::Path::from_ident(ast::Ident::with_dummy_span(name)),
|
|
node: ast::MetaItemKind::Word,
|
|
span: DUMMY_SP,
|
|
});
|
|
|
|
// Note that crt-static is a specially recognized cfg
|
|
// directive that's printed out here as part of
|
|
// rust-lang/rust#37406, but in general the
|
|
// `target_feature` cfg is gated under
|
|
// rust-lang/rust#29717. For now this is just
|
|
// specifically allowing the crt-static cfg and that's
|
|
// it, this is intended to get into Cargo and then go
|
|
// through to build scripts.
|
|
let value = value.as_ref().map(|s| s.as_str());
|
|
let value = value.as_ref().map(|s| s.as_ref());
|
|
if name != sym::target_feature || value != Some("crt-static") {
|
|
if !allow_unstable_cfg && gated_cfg.is_some() {
|
|
return None
|
|
}
|
|
}
|
|
|
|
if let Some(value) = value {
|
|
Some(format!("{}=\"{}\"", name, value))
|
|
} else {
|
|
Some(name.to_string())
|
|
}
|
|
}).collect::<Vec<String>>();
|
|
|
|
cfgs.sort();
|
|
for cfg in cfgs {
|
|
println!("{}", cfg);
|
|
}
|
|
}
|
|
RelocationModels | CodeModels | TlsModels | TargetCPUs | TargetFeatures => {
|
|
codegen_backend.print(*req, sess);
|
|
}
|
|
// Any output here interferes with Cargo's parsing of other printed output
|
|
PrintRequest::NativeStaticLibs => {}
|
|
}
|
|
}
|
|
return Compilation::Stop;
|
|
}
|
|
}
|
|
|
|
/// Returns a version string such as "0.12.0-dev".
|
|
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.
|
|
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.
|
|
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()));
|
|
get_codegen_sysroot("llvm")().print_version();
|
|
}
|
|
}
|
|
|
|
fn usage(verbose: bool, include_unstable_options: bool) {
|
|
let groups = if verbose {
|
|
config::rustc_optgroups()
|
|
} else {
|
|
config::rustc_short_optgroups()
|
|
};
|
|
let mut options = getopts::Options::new();
|
|
for option in groups.iter().filter(|x| include_unstable_options || x.is_stable()) {
|
|
(option.apply)(&mut options);
|
|
}
|
|
let message = "Usage: rustc [OPTIONS] INPUT";
|
|
let nightly_help = if nightly_options::is_nightly_build() {
|
|
"\n -Z help Print unstable compiler options"
|
|
} else {
|
|
""
|
|
};
|
|
let verbose_help = if verbose {
|
|
""
|
|
} else {
|
|
"\n --help -v Print the full set of options rustc accepts"
|
|
};
|
|
let at_path = if verbose && nightly_options::is_nightly_build() {
|
|
" @path Read newline separated options from `path`\n"
|
|
} else {
|
|
""
|
|
};
|
|
println!("{options}{at_path}\nAdditional help:
|
|
-C help Print codegen options
|
|
-W help \
|
|
Print 'lint' options and default settings{nightly}{verbose}\n",
|
|
options = options.usage(message),
|
|
at_path = at_path,
|
|
nightly = nightly_help,
|
|
verbose = verbose_help);
|
|
}
|
|
|
|
fn print_wall_help() {
|
|
println!("
|
|
The flag `-Wall` does not exist in `rustc`. Most useful lints are enabled by
|
|
default. Use `rustc -W help` to see all available lints. It's more common to put
|
|
warning settings in the crate root using `#![warn(LINT_NAME)]` instead of using
|
|
the command line flag directly.
|
|
");
|
|
}
|
|
|
|
fn describe_lints(sess: &Session, 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 <foo> and all attempts to override)
|
|
|
|
");
|
|
|
|
fn sort_lints(sess: &Session, lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
|
|
let mut lints: Vec<_> = lints.into_iter().map(|(x, _)| x).collect();
|
|
// The sort doesn't case-fold but it's doubtful we care.
|
|
lints.sort_by_cached_key(|x: &&Lint| (x.default_level(sess), x.name));
|
|
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_key(|l| l.0);
|
|
lints
|
|
}
|
|
|
|
let (plugin, builtin): (Vec<_>, _) = lint_store.get_lints()
|
|
.iter()
|
|
.cloned()
|
|
.partition(|&(_, p)| p);
|
|
let plugin = sort_lints(sess, plugin);
|
|
let builtin = sort_lints(sess, 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(max_name_len - x.chars().count());
|
|
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(max_name_len - x.chars().count());
|
|
s.push_str(x);
|
|
s
|
|
};
|
|
|
|
println!("Lint groups provided by rustc:\n");
|
|
println!(" {} {}", padded("name"), "sub-lints");
|
|
println!(" {} {}", padded("----"), "---------");
|
|
println!(" {} {}", padded("warnings"), "all lints that are set to issue warnings");
|
|
|
|
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.to_string().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 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 complicated as it ties into
|
|
/// our stability story. The current intention of each compiler option is to
|
|
/// have one of two modes:
|
|
///
|
|
/// 1. An option is stable and can be used everywhere.
|
|
/// 2. 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 mut options = getopts::Options::new();
|
|
for option in config::rustc_optgroups() {
|
|
(option.apply)(&mut options);
|
|
}
|
|
let matches = options.parse(args).unwrap_or_else(|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 an unstable option then we generate an error
|
|
// (unstable option being used on stable)
|
|
nightly_options::check_nightly_options(&matches, &config::rustc_optgroups());
|
|
|
|
// Late check to see if @file was used without unstable options enabled
|
|
if crate::args::used_unstable_argsfile() && !nightly_options::is_unstable_enabled(&matches) {
|
|
early_error(ErrorOutputType::default(),
|
|
"@path is unstable - use -Z unstable-options to enable its use");
|
|
}
|
|
|
|
if matches.opt_present("h") || matches.opt_present("help") {
|
|
// Only show unstable options in --help if we accept unstable options.
|
|
usage(matches.opt_present("verbose"), nightly_options::is_unstable_enabled(&matches));
|
|
return None;
|
|
}
|
|
|
|
// Handle the special case of -Wall.
|
|
let wall = matches.opt_strs("W");
|
|
if wall.iter().any(|x| *x == "all") {
|
|
print_wall_help();
|
|
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.iter().any(|x| *x == "no-stack-check") {
|
|
early_warn(ErrorOutputType::default(),
|
|
"the --no-stack-check flag is deprecated and does nothing");
|
|
}
|
|
|
|
if cg_flags.iter().any(|x| *x == "passes=list") {
|
|
get_codegen_sysroot("llvm")().print_passes();
|
|
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, &sess.parse_sess)
|
|
}
|
|
Input::Str { ref name, ref input } => {
|
|
parse::parse_crate_attrs_from_source_str(name.clone(),
|
|
input.clone(),
|
|
&sess.parse_sess)
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Gets a list of extra command-line flags provided by the user, as strings.
|
|
///
|
|
/// This function is used during ICEs to show more information useful for
|
|
/// debugging, since some ICEs only happens with non-default compiler flags
|
|
/// (and the users don't always report them).
|
|
fn extra_compiler_flags() -> Option<(Vec<String>, bool)> {
|
|
let args = env::args_os().map(|arg| arg.to_string_lossy().to_string()).collect::<Vec<_>>();
|
|
|
|
// Avoid printing help because of empty args. This can suggest the compiler
|
|
// itself is not the program root (consider RLS).
|
|
if args.len() < 2 {
|
|
return None;
|
|
}
|
|
|
|
let matches = if let Some(matches) = handle_options(&args) {
|
|
matches
|
|
} else {
|
|
return None;
|
|
};
|
|
|
|
let mut result = Vec::new();
|
|
let mut excluded_cargo_defaults = false;
|
|
for flag in ICE_REPORT_COMPILER_FLAGS {
|
|
let prefix = if flag.len() == 1 { "-" } else { "--" };
|
|
|
|
for content in &matches.opt_strs(flag) {
|
|
// Split always returns the first element
|
|
let name = if let Some(first) = content.split('=').next() {
|
|
first
|
|
} else {
|
|
&content
|
|
};
|
|
|
|
let content = if ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE.contains(&name) {
|
|
name
|
|
} else {
|
|
content
|
|
};
|
|
|
|
if !ICE_REPORT_COMPILER_FLAGS_EXCLUDE.contains(&name) {
|
|
result.push(format!("{}{} {}", prefix, flag, content));
|
|
} else {
|
|
excluded_cargo_defaults = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if !result.is_empty() {
|
|
Some((result, excluded_cargo_defaults))
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
|
|
/// Runs a closure and catches unwinds triggered by fatal errors.
|
|
///
|
|
/// The compiler currently unwinds with a special sentinel value to abort
|
|
/// compilation on fatal errors. This function catches that sentinel and turns
|
|
/// the panic into a `Result` instead.
|
|
pub fn catch_fatal_errors<F: FnOnce() -> R, R>(f: F) -> Result<R, ErrorReported> {
|
|
catch_unwind(panic::AssertUnwindSafe(f)).map_err(|value| {
|
|
if value.is::<errors::FatalErrorMarker>() {
|
|
ErrorReported
|
|
} else {
|
|
panic::resume_unwind(value);
|
|
}
|
|
})
|
|
}
|
|
|
|
lazy_static! {
|
|
static ref DEFAULT_HOOK: Box<dyn Fn(&panic::PanicInfo<'_>) + Sync + Send + 'static> = {
|
|
let hook = panic::take_hook();
|
|
panic::set_hook(Box::new(|info| report_ice(info, BUG_REPORT_URL)));
|
|
hook
|
|
};
|
|
}
|
|
|
|
/// Prints the ICE message, including backtrace and query stack.
|
|
///
|
|
/// The message will point the user at `bug_report_url` to report the ICE.
|
|
///
|
|
/// When `install_ice_hook` is called, this function will be called as the panic
|
|
/// hook.
|
|
pub fn report_ice(info: &panic::PanicInfo<'_>, bug_report_url: &str) {
|
|
// Invoke the default handler, which prints the actual panic message and optionally a backtrace
|
|
(*DEFAULT_HOOK)(info);
|
|
|
|
// Separate the output with an empty line
|
|
eprintln!();
|
|
|
|
let emitter = Box::new(errors::emitter::EmitterWriter::stderr(
|
|
errors::ColorConfig::Auto,
|
|
None,
|
|
false,
|
|
false,
|
|
None,
|
|
false,
|
|
));
|
|
let handler = errors::Handler::with_emitter(true, None, emitter);
|
|
|
|
// a .span_bug or .bug call has already printed what
|
|
// it wants to print.
|
|
if !info.payload().is::<errors::ExplicitBug>() {
|
|
let d = errors::Diagnostic::new(errors::Level::Bug, "unexpected panic");
|
|
handler.emit_diagnostic(&d);
|
|
handler.abort_if_errors_and_should_abort();
|
|
}
|
|
|
|
let mut xs: Vec<Cow<'static, str>> = vec![
|
|
"the compiler unexpectedly panicked. this is a bug.".into(),
|
|
format!("we would appreciate a bug report: {}", bug_report_url).into(),
|
|
format!("rustc {} running on {}",
|
|
option_env!("CFG_VERSION").unwrap_or("unknown_version"),
|
|
config::host_triple()).into(),
|
|
];
|
|
|
|
if let Some((flags, excluded_cargo_defaults)) = extra_compiler_flags() {
|
|
xs.push(format!("compiler flags: {}", flags.join(" ")).into());
|
|
|
|
if excluded_cargo_defaults {
|
|
xs.push("some of the compiler flags provided by cargo are hidden".into());
|
|
}
|
|
}
|
|
|
|
for note in &xs {
|
|
handler.note_without_error(¬e);
|
|
}
|
|
|
|
// If backtraces are enabled, also print the query stack
|
|
let backtrace = env::var_os("RUST_BACKTRACE").map(|x| &x != "0").unwrap_or(false);
|
|
|
|
if backtrace {
|
|
TyCtxt::try_print_query_stack();
|
|
}
|
|
|
|
#[cfg(windows)]
|
|
unsafe {
|
|
if env::var("RUSTC_BREAK_ON_ICE").is_ok() {
|
|
extern "system" {
|
|
fn DebugBreak();
|
|
}
|
|
// Trigger a debugger if we crashed during bootstrap
|
|
DebugBreak();
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Installs a panic hook that will print the ICE message on unexpected panics.
|
|
///
|
|
/// A custom rustc driver can skip calling this to set up a custom ICE hook.
|
|
pub fn install_ice_hook() {
|
|
lazy_static::initialize(&DEFAULT_HOOK);
|
|
}
|
|
|
|
/// This allows tools to enable rust logging without having to magically match rustc's
|
|
/// log crate version
|
|
pub fn init_rustc_env_logger() {
|
|
env_logger::init_from_env("RUSTC_LOG");
|
|
}
|
|
|
|
pub fn main() {
|
|
let start = Instant::now();
|
|
init_rustc_env_logger();
|
|
let mut callbacks = TimePassesCallbacks::default();
|
|
install_ice_hook();
|
|
let result = catch_fatal_errors(|| {
|
|
let args = env::args_os().enumerate()
|
|
.map(|(i, arg)| arg.into_string().unwrap_or_else(|arg| {
|
|
early_error(ErrorOutputType::default(),
|
|
&format!("Argument {} is not valid Unicode: {:?}", i, arg))
|
|
}))
|
|
.collect::<Vec<_>>();
|
|
run_compiler(&args, &mut callbacks, None, None)
|
|
}).and_then(|result| result);
|
|
let exit_code = match result {
|
|
Ok(_) => EXIT_SUCCESS,
|
|
Err(_) => EXIT_FAILURE,
|
|
};
|
|
// The extra `\t` is necessary to align this label with the others.
|
|
set_time_depth(0);
|
|
print_time_passes_entry(callbacks.time_passes, "\ttotal", start.elapsed());
|
|
process::exit(exit_code);
|
|
}
|