948 lines
36 KiB
Rust
948 lines
36 KiB
Rust
// Copyright 2012-2013 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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use rustc::session::Session;
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use rustc::session::config::{self, Input, OutputFilenames};
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use rustc::session::search_paths::PathKind;
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use rustc::lint;
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use rustc::metadata::creader::CrateReader;
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use rustc::middle::{stability, ty, reachable};
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use rustc::middle::dependency_format;
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use rustc::middle;
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use rustc::plugin::load::Plugins;
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use rustc::plugin::registry::Registry;
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use rustc::plugin;
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use rustc::util::common::time;
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use rustc_borrowck as borrowck;
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use rustc_resolve as resolve;
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use rustc_trans::back::link;
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use rustc_trans::back::write;
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use rustc_trans::trans;
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use rustc_typeck as typeck;
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use rustc_privacy;
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use serialize::json;
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use std::io;
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use std::io::fs;
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use std::os;
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use syntax::ast;
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use syntax::ast_map;
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use syntax::attr;
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use syntax::attr::{AttrMetaMethods};
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use syntax::diagnostics;
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use syntax::parse;
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use syntax::parse::token;
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use syntax;
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pub fn compile_input(sess: Session,
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cfg: ast::CrateConfig,
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input: &Input,
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outdir: &Option<Path>,
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output: &Option<Path>,
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addl_plugins: Option<Vec<String>>,
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control: CompileController) {
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macro_rules! controller_entry_point{($point: ident, $make_state: expr) => ({
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{
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let state = $make_state;
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(control.$point.callback)(state);
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}
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if control.$point.stop {
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return;
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}
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})}
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// We need nested scopes here, because the intermediate results can keep
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// large chunks of memory alive and we want to free them as soon as
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// possible to keep the peak memory usage low
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let (outputs, trans, sess) = {
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let (outputs, expanded_crate, id) = {
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let krate = phase_1_parse_input(&sess, cfg, input);
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controller_entry_point!(after_parse,
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CompileState::state_after_parse(input,
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&sess,
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outdir,
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&krate));
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let outputs = build_output_filenames(input,
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outdir,
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output,
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&krate.attrs[],
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&sess);
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let id = link::find_crate_name(Some(&sess),
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&krate.attrs[],
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input);
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let expanded_crate
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= match phase_2_configure_and_expand(&sess,
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krate,
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&id[],
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addl_plugins) {
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None => return,
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Some(k) => k
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};
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(outputs, expanded_crate, id)
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};
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controller_entry_point!(after_expand,
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CompileState::state_after_expand(input,
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&sess,
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outdir,
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&expanded_crate,
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&id[]));
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let mut forest = ast_map::Forest::new(expanded_crate);
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let ast_map = assign_node_ids_and_map(&sess, &mut forest);
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write_out_deps(&sess, input, &outputs, &id[]);
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controller_entry_point!(after_write_deps,
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CompileState::state_after_write_deps(input,
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&sess,
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outdir,
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&ast_map,
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&id[]));
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let arenas = ty::CtxtArenas::new();
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let analysis = phase_3_run_analysis_passes(sess,
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ast_map,
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&arenas,
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id,
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control.make_glob_map);
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controller_entry_point!(after_analysis,
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CompileState::state_after_analysis(input,
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&analysis.ty_cx.sess,
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outdir,
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analysis.ty_cx.map.krate(),
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&analysis,
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&analysis.ty_cx));
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if log_enabled!(::log::INFO) {
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println!("Pre-trans");
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analysis.ty_cx.print_debug_stats();
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}
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let (tcx, trans) = phase_4_translate_to_llvm(analysis);
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if log_enabled!(::log::INFO) {
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println!("Post-trans");
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tcx.print_debug_stats();
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}
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// Discard interned strings as they are no longer required.
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token::get_ident_interner().clear();
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(outputs, trans, tcx.sess)
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};
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phase_5_run_llvm_passes(&sess, &trans, &outputs);
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controller_entry_point!(after_llvm,
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CompileState::state_after_llvm(input,
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&sess,
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outdir,
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&trans));
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phase_6_link_output(&sess, &trans, &outputs);
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}
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/// The name used for source code that doesn't originate in a file
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/// (e.g. source from stdin or a string)
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pub fn anon_src() -> String {
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"<anon>".to_string()
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}
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pub fn source_name(input: &Input) -> String {
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match *input {
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// FIXME (#9639): This needs to handle non-utf8 paths
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Input::File(ref ifile) => ifile.as_str().unwrap().to_string(),
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Input::Str(_) => anon_src()
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}
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}
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/// CompileController is used to customise compilation, it allows compilation to
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/// be stopped and/or to call arbitrary code at various points in compilation.
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/// It also allows for various flags to be set to influence what information gets
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/// colelcted during compilation.
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///
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/// This is a somewhat higher level controller than a Session - the Session
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/// controls what happens in each phase, whereas the CompileController controls
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/// whether a phase is run at all and whether other code (from outside the
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/// the compiler) is run between phases.
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///
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/// Note that if compilation is set to stop and a callback is provided for a
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/// given entry point, the callback is called before compilation is stopped.
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///
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/// Expect more entry points to be added in the future.
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pub struct CompileController<'a> {
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pub after_parse: PhaseController<'a>,
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pub after_expand: PhaseController<'a>,
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pub after_write_deps: PhaseController<'a>,
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pub after_analysis: PhaseController<'a>,
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pub after_llvm: PhaseController<'a>,
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pub make_glob_map: resolve::MakeGlobMap,
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}
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impl<'a> CompileController<'a> {
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pub fn basic() -> CompileController<'a> {
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CompileController {
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after_parse: PhaseController::basic(),
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after_expand: PhaseController::basic(),
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after_write_deps: PhaseController::basic(),
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after_analysis: PhaseController::basic(),
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after_llvm: PhaseController::basic(),
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make_glob_map: resolve::MakeGlobMap::No,
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}
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}
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}
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pub struct PhaseController<'a> {
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pub stop: bool,
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pub callback: Box<Fn(CompileState) -> () + 'a>,
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}
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impl<'a> PhaseController<'a> {
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pub fn basic() -> PhaseController<'a> {
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PhaseController {
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stop: false,
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callback: box |&: _| {},
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}
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}
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}
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/// State that is passed to a callback. What state is available depends on when
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/// during compilation the callback is made. See the various constructor methods
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/// (`state_*`) in the impl to see which data is provided for any given entry point.
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pub struct CompileState<'a, 'ast: 'a, 'tcx: 'a> {
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pub input: &'a Input,
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pub session: &'a Session,
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pub cfg: Option<&'a ast::CrateConfig>,
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pub krate: Option<&'a ast::Crate>,
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pub crate_name: Option<&'a str>,
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pub output_filenames: Option<&'a OutputFilenames>,
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pub out_dir: Option<&'a Path>,
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pub expanded_crate: Option<&'a ast::Crate>,
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pub ast_map: Option<&'a ast_map::Map<'ast>>,
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pub analysis: Option<&'a ty::CrateAnalysis<'tcx>>,
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pub tcx: Option<&'a ty::ctxt<'tcx>>,
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pub trans: Option<&'a trans::CrateTranslation>,
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}
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impl<'a, 'ast, 'tcx> CompileState<'a, 'ast, 'tcx> {
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fn empty(input: &'a Input,
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session: &'a Session,
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out_dir: &'a Option<Path>)
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-> CompileState<'a, 'ast, 'tcx> {
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CompileState {
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input: input,
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session: session,
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out_dir: out_dir.as_ref(),
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cfg: None,
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krate: None,
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crate_name: None,
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output_filenames: None,
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expanded_crate: None,
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ast_map: None,
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analysis: None,
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tcx: None,
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trans: None,
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}
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}
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fn state_after_parse(input: &'a Input,
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session: &'a Session,
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out_dir: &'a Option<Path>,
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krate: &'a ast::Crate)
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-> CompileState<'a, 'ast, 'tcx> {
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CompileState {
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krate: Some(krate),
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.. CompileState::empty(input, session, out_dir)
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}
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}
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fn state_after_expand(input: &'a Input,
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session: &'a Session,
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out_dir: &'a Option<Path>,
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expanded_crate: &'a ast::Crate,
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crate_name: &'a str)
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-> CompileState<'a, 'ast, 'tcx> {
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CompileState {
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crate_name: Some(crate_name),
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expanded_crate: Some(expanded_crate),
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.. CompileState::empty(input, session, out_dir)
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}
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}
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fn state_after_write_deps(input: &'a Input,
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session: &'a Session,
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out_dir: &'a Option<Path>,
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ast_map: &'a ast_map::Map<'ast>,
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crate_name: &'a str)
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-> CompileState<'a, 'ast, 'tcx> {
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CompileState {
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crate_name: Some(crate_name),
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ast_map: Some(ast_map),
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.. CompileState::empty(input, session, out_dir)
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}
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}
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fn state_after_analysis(input: &'a Input,
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session: &'a Session,
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out_dir: &'a Option<Path>,
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krate: &'a ast::Crate,
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analysis: &'a ty::CrateAnalysis<'tcx>,
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tcx: &'a ty::ctxt<'tcx>)
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-> CompileState<'a, 'ast, 'tcx> {
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CompileState {
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analysis: Some(analysis),
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tcx: Some(tcx),
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krate: Some(krate),
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.. CompileState::empty(input, session, out_dir)
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}
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}
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fn state_after_llvm(input: &'a Input,
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session: &'a Session,
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out_dir: &'a Option<Path>,
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trans: &'a trans::CrateTranslation)
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-> CompileState<'a, 'ast, 'tcx> {
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CompileState {
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trans: Some(trans),
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.. CompileState::empty(input, session, out_dir)
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}
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}
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}
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pub fn phase_1_parse_input(sess: &Session, cfg: ast::CrateConfig, input: &Input)
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-> ast::Crate {
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// These may be left in an incoherent state after a previous compile.
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// `clear_tables` and `get_ident_interner().clear()` can be used to free
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// memory, but they do not restore the initial state.
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syntax::ext::mtwt::reset_tables();
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token::reset_ident_interner();
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let krate = time(sess.time_passes(), "parsing", (), |_| {
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match *input {
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Input::File(ref file) => {
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parse::parse_crate_from_file(&(*file), cfg.clone(), &sess.parse_sess)
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}
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Input::Str(ref src) => {
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parse::parse_crate_from_source_str(anon_src().to_string(),
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src.to_string(),
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cfg.clone(),
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&sess.parse_sess)
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}
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}
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});
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if sess.opts.debugging_opts.ast_json_noexpand {
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println!("{}", json::as_json(&krate));
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}
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if let Some(ref s) = sess.opts.show_span {
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syntax::show_span::run(sess.diagnostic(), s.as_slice(), &krate);
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}
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krate
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}
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// For continuing compilation after a parsed crate has been
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// modified
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/// Run the "early phases" of the compiler: initial `cfg` processing,
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/// loading compiler plugins (including those from `addl_plugins`),
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/// syntax expansion, secondary `cfg` expansion, synthesis of a test
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/// harness if one is to be provided and injection of a dependency on the
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/// standard library and prelude.
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///
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/// Returns `None` if we're aborting after handling -W help.
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pub fn phase_2_configure_and_expand(sess: &Session,
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mut krate: ast::Crate,
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crate_name: &str,
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addl_plugins: Option<Vec<String>>)
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-> Option<ast::Crate> {
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let time_passes = sess.time_passes();
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*sess.crate_types.borrow_mut() =
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collect_crate_types(sess, &krate.attrs[]);
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*sess.crate_metadata.borrow_mut() =
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collect_crate_metadata(sess, &krate.attrs[]);
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time(time_passes, "recursion limit", (), |_| {
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middle::recursion_limit::update_recursion_limit(sess, &krate);
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});
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// strip before expansion to allow macros to depend on
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// configuration variables e.g/ in
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//
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// #[macro_use] #[cfg(foo)]
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// mod bar { macro_rules! baz!(() => {{}}) }
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//
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// baz! should not use this definition unless foo is enabled.
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time(time_passes, "gated macro checking", (), |_| {
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let features =
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syntax::feature_gate::check_crate_macros(sess.codemap(),
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&sess.parse_sess.span_diagnostic,
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&krate);
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// these need to be set "early" so that expansion sees `quote` if enabled.
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*sess.features.borrow_mut() = features;
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sess.abort_if_errors();
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});
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krate = time(time_passes, "configuration 1", krate, |krate|
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syntax::config::strip_unconfigured_items(sess.diagnostic(), krate));
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krate = time(time_passes, "crate injection", krate, |krate|
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syntax::std_inject::maybe_inject_crates_ref(krate,
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sess.opts.alt_std_name.clone()));
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let mut addl_plugins = Some(addl_plugins);
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let Plugins { macros, registrars }
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= time(time_passes, "plugin loading", (), |_|
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plugin::load::load_plugins(sess, &krate, addl_plugins.take().unwrap()));
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let mut registry = Registry::new(sess, &krate);
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time(time_passes, "plugin registration", registrars, |registrars| {
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if sess.features.borrow().rustc_diagnostic_macros {
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registry.register_macro("__diagnostic_used",
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diagnostics::plugin::expand_diagnostic_used);
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registry.register_macro("__register_diagnostic",
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diagnostics::plugin::expand_register_diagnostic);
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registry.register_macro("__build_diagnostic_array",
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diagnostics::plugin::expand_build_diagnostic_array);
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}
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for registrar in registrars.into_iter() {
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registry.args_hidden = Some(registrar.args);
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(registrar.fun)(&mut registry);
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}
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});
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let Registry { syntax_exts, lint_passes, lint_groups, .. } = registry;
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{
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let mut ls = sess.lint_store.borrow_mut();
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for pass in lint_passes.into_iter() {
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ls.register_pass(Some(sess), true, pass);
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}
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for (name, to) in lint_groups.into_iter() {
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ls.register_group(Some(sess), true, name, to);
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}
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}
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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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super::describe_lints(&*sess.lint_store.borrow(), true);
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return None;
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}
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sess.lint_store.borrow_mut().process_command_line(sess);
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// Abort if there are errors from lint processing or a plugin registrar.
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sess.abort_if_errors();
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krate = time(time_passes, "expansion", (krate, macros, syntax_exts),
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|(krate, macros, syntax_exts)| {
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// Windows dlls do not have rpaths, so they don't know how to find their
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// dependencies. It's up to us to tell the system where to find all the
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// dependent dlls. Note that this uses cfg!(windows) as opposed to
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// targ_cfg because syntax extensions are always loaded for the host
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// compiler, not for the target.
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let mut _old_path = String::new();
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if cfg!(windows) {
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_old_path = os::getenv("PATH").unwrap_or(_old_path);
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let mut new_path = sess.host_filesearch(PathKind::All).get_dylib_search_paths();
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new_path.extend(os::split_paths(&_old_path[]).into_iter());
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os::setenv("PATH", os::join_paths(&new_path[]).unwrap());
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}
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let cfg = syntax::ext::expand::ExpansionConfig {
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crate_name: crate_name.to_string(),
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enable_quotes: sess.features.borrow().quote,
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recursion_limit: sess.recursion_limit.get(),
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};
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let ret = syntax::ext::expand::expand_crate(&sess.parse_sess,
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cfg,
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macros,
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syntax_exts,
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krate);
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if cfg!(windows) {
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os::setenv("PATH", _old_path);
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}
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ret
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}
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);
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// Needs to go *after* expansion to be able to check the results of macro expansion.
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time(time_passes, "complete gated feature checking", (), |_| {
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let features =
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syntax::feature_gate::check_crate(sess.codemap(),
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&sess.parse_sess.span_diagnostic,
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&krate);
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*sess.features.borrow_mut() = features;
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sess.abort_if_errors();
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});
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|
|
// JBC: make CFG processing part of expansion to avoid this problem:
|
|
|
|
// strip again, in case expansion added anything with a #[cfg].
|
|
krate = time(time_passes, "configuration 2", krate, |krate|
|
|
syntax::config::strip_unconfigured_items(sess.diagnostic(), krate));
|
|
|
|
krate = time(time_passes, "maybe building test harness", krate, |krate|
|
|
syntax::test::modify_for_testing(&sess.parse_sess,
|
|
&sess.opts.cfg,
|
|
krate,
|
|
sess.diagnostic()));
|
|
|
|
krate = time(time_passes, "prelude injection", krate, |krate|
|
|
syntax::std_inject::maybe_inject_prelude(krate));
|
|
|
|
time(time_passes, "checking that all macro invocations are gone", &krate, |krate|
|
|
syntax::ext::expand::check_for_macros(&sess.parse_sess, krate));
|
|
|
|
Some(krate)
|
|
}
|
|
|
|
pub fn assign_node_ids_and_map<'ast>(sess: &Session,
|
|
forest: &'ast mut ast_map::Forest)
|
|
-> ast_map::Map<'ast> {
|
|
struct NodeIdAssigner<'a> {
|
|
sess: &'a Session
|
|
}
|
|
|
|
impl<'a> ast_map::FoldOps for NodeIdAssigner<'a> {
|
|
fn new_id(&self, old_id: ast::NodeId) -> ast::NodeId {
|
|
assert_eq!(old_id, ast::DUMMY_NODE_ID);
|
|
self.sess.next_node_id()
|
|
}
|
|
}
|
|
|
|
let map = time(sess.time_passes(), "assigning node ids and indexing ast", forest, |forest|
|
|
ast_map::map_crate(forest, NodeIdAssigner { sess: sess }));
|
|
|
|
if sess.opts.debugging_opts.ast_json {
|
|
println!("{}", json::as_json(map.krate()));
|
|
}
|
|
|
|
map
|
|
}
|
|
|
|
/// Run the resolution, typechecking, region checking and other
|
|
/// miscellaneous analysis passes on the crate. Return various
|
|
/// structures carrying the results of the analysis.
|
|
pub fn phase_3_run_analysis_passes<'tcx>(sess: Session,
|
|
ast_map: ast_map::Map<'tcx>,
|
|
arenas: &'tcx ty::CtxtArenas<'tcx>,
|
|
name: String,
|
|
make_glob_map: resolve::MakeGlobMap)
|
|
-> ty::CrateAnalysis<'tcx> {
|
|
let time_passes = sess.time_passes();
|
|
let krate = ast_map.krate();
|
|
|
|
time(time_passes, "external crate/lib resolution", (), |_|
|
|
CrateReader::new(&sess).read_crates(krate));
|
|
|
|
let lang_items = time(time_passes, "language item collection", (), |_|
|
|
middle::lang_items::collect_language_items(krate, &sess));
|
|
|
|
let resolve::CrateMap {
|
|
def_map,
|
|
freevars,
|
|
capture_mode_map,
|
|
export_map,
|
|
trait_map,
|
|
external_exports,
|
|
last_private_map,
|
|
glob_map,
|
|
} =
|
|
time(time_passes, "resolution", (),
|
|
|_| resolve::resolve_crate(&sess,
|
|
&ast_map,
|
|
&lang_items,
|
|
krate,
|
|
make_glob_map));
|
|
|
|
// Discard MTWT tables that aren't required past resolution.
|
|
syntax::ext::mtwt::clear_tables();
|
|
|
|
let named_region_map = time(time_passes, "lifetime resolution", (),
|
|
|_| middle::resolve_lifetime::krate(&sess, krate, &def_map));
|
|
|
|
time(time_passes, "looking for entry point", (),
|
|
|_| middle::entry::find_entry_point(&sess, &ast_map));
|
|
|
|
sess.plugin_registrar_fn.set(
|
|
time(time_passes, "looking for plugin registrar", (), |_|
|
|
plugin::build::find_plugin_registrar(
|
|
sess.diagnostic(), krate)));
|
|
|
|
let region_map = time(time_passes, "region resolution", (), |_|
|
|
middle::region::resolve_crate(&sess, krate));
|
|
|
|
time(time_passes, "loop checking", (), |_|
|
|
middle::check_loop::check_crate(&sess, krate));
|
|
|
|
let stability_index = time(time_passes, "stability index", (), |_|
|
|
stability::Index::build(&sess, krate));
|
|
|
|
time(time_passes, "static item recursion checking", (), |_|
|
|
middle::check_static_recursion::check_crate(&sess, krate, &def_map, &ast_map));
|
|
|
|
let ty_cx = ty::mk_ctxt(sess,
|
|
arenas,
|
|
def_map,
|
|
named_region_map,
|
|
ast_map,
|
|
freevars,
|
|
capture_mode_map,
|
|
region_map,
|
|
lang_items,
|
|
stability_index);
|
|
|
|
// passes are timed inside typeck
|
|
typeck::check_crate(&ty_cx, trait_map);
|
|
|
|
time(time_passes, "check static items", (), |_|
|
|
middle::check_static::check_crate(&ty_cx));
|
|
|
|
// These next two const passes can probably be merged
|
|
time(time_passes, "const marking", (), |_|
|
|
middle::const_eval::process_crate(&ty_cx));
|
|
|
|
time(time_passes, "const checking", (), |_|
|
|
middle::check_const::check_crate(&ty_cx));
|
|
|
|
let maps = (external_exports, last_private_map);
|
|
let (exported_items, public_items) =
|
|
time(time_passes, "privacy checking", maps, |(a, b)|
|
|
rustc_privacy::check_crate(&ty_cx, &export_map, a, b));
|
|
|
|
time(time_passes, "intrinsic checking", (), |_|
|
|
middle::intrinsicck::check_crate(&ty_cx));
|
|
|
|
time(time_passes, "effect checking", (), |_|
|
|
middle::effect::check_crate(&ty_cx));
|
|
|
|
time(time_passes, "match checking", (), |_|
|
|
middle::check_match::check_crate(&ty_cx));
|
|
|
|
time(time_passes, "liveness checking", (), |_|
|
|
middle::liveness::check_crate(&ty_cx));
|
|
|
|
time(time_passes, "borrow checking", (), |_|
|
|
borrowck::check_crate(&ty_cx));
|
|
|
|
time(time_passes, "rvalue checking", (), |_|
|
|
middle::check_rvalues::check_crate(&ty_cx, krate));
|
|
|
|
// Avoid overwhelming user with errors if type checking failed.
|
|
// I'm not sure how helpful this is, to be honest, but it avoids a
|
|
// lot of annoying errors in the compile-fail tests (basically,
|
|
// lint warnings and so on -- kindck used to do this abort, but
|
|
// kindck is gone now). -nmatsakis
|
|
ty_cx.sess.abort_if_errors();
|
|
|
|
let reachable_map =
|
|
time(time_passes, "reachability checking", (), |_|
|
|
reachable::find_reachable(&ty_cx, &exported_items));
|
|
|
|
time(time_passes, "death checking", (), |_| {
|
|
middle::dead::check_crate(&ty_cx,
|
|
&exported_items,
|
|
&reachable_map)
|
|
});
|
|
|
|
let ref lib_features_used =
|
|
time(time_passes, "stability checking", (), |_|
|
|
stability::check_unstable_api_usage(&ty_cx));
|
|
|
|
time(time_passes, "unused feature checking", (), |_|
|
|
stability::check_unused_features(
|
|
&ty_cx.sess, lib_features_used));
|
|
|
|
time(time_passes, "lint checking", (), |_|
|
|
lint::check_crate(&ty_cx, &exported_items));
|
|
|
|
// The above three passes generate errors w/o aborting
|
|
ty_cx.sess.abort_if_errors();
|
|
|
|
ty::CrateAnalysis {
|
|
export_map: export_map,
|
|
ty_cx: ty_cx,
|
|
exported_items: exported_items,
|
|
public_items: public_items,
|
|
reachable: reachable_map,
|
|
name: name,
|
|
glob_map: glob_map,
|
|
}
|
|
}
|
|
|
|
/// Run the translation phase to LLVM, after which the AST and analysis can
|
|
/// be discarded.
|
|
pub fn phase_4_translate_to_llvm<'tcx>(analysis: ty::CrateAnalysis<'tcx>)
|
|
-> (ty::ctxt<'tcx>, trans::CrateTranslation) {
|
|
let time_passes = analysis.ty_cx.sess.time_passes();
|
|
|
|
time(time_passes, "resolving dependency formats", (), |_|
|
|
dependency_format::calculate(&analysis.ty_cx));
|
|
|
|
// Option dance to work around the lack of stack once closures.
|
|
time(time_passes, "translation", analysis, |analysis|
|
|
trans::trans_crate(analysis))
|
|
}
|
|
|
|
/// Run LLVM itself, producing a bitcode file, assembly file or object file
|
|
/// as a side effect.
|
|
pub fn phase_5_run_llvm_passes(sess: &Session,
|
|
trans: &trans::CrateTranslation,
|
|
outputs: &OutputFilenames) {
|
|
if sess.opts.cg.no_integrated_as {
|
|
let output_type = config::OutputTypeAssembly;
|
|
|
|
time(sess.time_passes(), "LLVM passes", (), |_|
|
|
write::run_passes(sess, trans, &[output_type], outputs));
|
|
|
|
write::run_assembler(sess, outputs);
|
|
|
|
// Remove assembly source, unless --save-temps was specified
|
|
if !sess.opts.cg.save_temps {
|
|
fs::unlink(&outputs.temp_path(config::OutputTypeAssembly)).unwrap();
|
|
}
|
|
} else {
|
|
time(sess.time_passes(), "LLVM passes", (), |_|
|
|
write::run_passes(sess,
|
|
trans,
|
|
&sess.opts.output_types[],
|
|
outputs));
|
|
}
|
|
|
|
sess.abort_if_errors();
|
|
}
|
|
|
|
/// Run the linker on any artifacts that resulted from the LLVM run.
|
|
/// This should produce either a finished executable or library.
|
|
pub fn phase_6_link_output(sess: &Session,
|
|
trans: &trans::CrateTranslation,
|
|
outputs: &OutputFilenames) {
|
|
let old_path = os::getenv("PATH").unwrap_or_else(||String::new());
|
|
let mut new_path = sess.host_filesearch(PathKind::All).get_tools_search_paths();
|
|
new_path.extend(os::split_paths(&old_path[]).into_iter());
|
|
os::setenv("PATH", os::join_paths(&new_path[]).unwrap());
|
|
|
|
time(sess.time_passes(), "linking", (), |_|
|
|
link::link_binary(sess,
|
|
trans,
|
|
outputs,
|
|
&trans.link.crate_name[]));
|
|
|
|
os::setenv("PATH", old_path);
|
|
}
|
|
|
|
fn escape_dep_filename(filename: &str) -> String {
|
|
// Apparently clang and gcc *only* escape spaces:
|
|
// http://llvm.org/klaus/clang/commit/9d50634cfc268ecc9a7250226dd5ca0e945240d4
|
|
filename.replace(" ", "\\ ")
|
|
}
|
|
|
|
fn write_out_deps(sess: &Session,
|
|
input: &Input,
|
|
outputs: &OutputFilenames,
|
|
id: &str) {
|
|
|
|
let mut out_filenames = Vec::new();
|
|
for output_type in sess.opts.output_types.iter() {
|
|
let file = outputs.path(*output_type);
|
|
match *output_type {
|
|
config::OutputTypeExe => {
|
|
for output in sess.crate_types.borrow().iter() {
|
|
let p = link::filename_for_input(sess, *output,
|
|
id, &file);
|
|
out_filenames.push(p);
|
|
}
|
|
}
|
|
_ => { out_filenames.push(file); }
|
|
}
|
|
}
|
|
|
|
// Write out dependency rules to the dep-info file if requested with
|
|
// --dep-info
|
|
let deps_filename = match sess.opts.write_dependency_info {
|
|
// Use filename from --dep-file argument if given
|
|
(true, Some(ref filename)) => filename.clone(),
|
|
// Use default filename: crate source filename with extension replaced
|
|
// by ".d"
|
|
(true, None) => match *input {
|
|
Input::File(..) => outputs.with_extension("d"),
|
|
Input::Str(..) => {
|
|
sess.warn("can not write --dep-info without a filename \
|
|
when compiling stdin.");
|
|
return
|
|
},
|
|
},
|
|
_ => return,
|
|
};
|
|
|
|
let result = (|&:| -> io::IoResult<()> {
|
|
// Build a list of files used to compile the output and
|
|
// write Makefile-compatible dependency rules
|
|
let files: Vec<String> = sess.codemap().files.borrow()
|
|
.iter().filter(|fmap| fmap.is_real_file())
|
|
.map(|fmap| escape_dep_filename(&fmap.name[]))
|
|
.collect();
|
|
let mut file = try!(io::File::create(&deps_filename));
|
|
for path in out_filenames.iter() {
|
|
try!(write!(&mut file as &mut Writer,
|
|
"{}: {}\n\n", path.display(), files.connect(" ")));
|
|
}
|
|
Ok(())
|
|
})();
|
|
|
|
match result {
|
|
Ok(()) => {}
|
|
Err(e) => {
|
|
sess.fatal(&format!("error writing dependencies to `{}`: {}",
|
|
deps_filename.display(), e)[]);
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn collect_crate_types(session: &Session,
|
|
attrs: &[ast::Attribute]) -> Vec<config::CrateType> {
|
|
// Unconditionally collect crate types from attributes to make them used
|
|
let attr_types: Vec<config::CrateType> = attrs.iter().filter_map(|a| {
|
|
if a.check_name("crate_type") {
|
|
match a.value_str() {
|
|
Some(ref n) if *n == "rlib" => {
|
|
Some(config::CrateTypeRlib)
|
|
}
|
|
Some(ref n) if *n == "dylib" => {
|
|
Some(config::CrateTypeDylib)
|
|
}
|
|
Some(ref n) if *n == "lib" => {
|
|
Some(config::default_lib_output())
|
|
}
|
|
Some(ref n) if *n == "staticlib" => {
|
|
Some(config::CrateTypeStaticlib)
|
|
}
|
|
Some(ref n) if *n == "bin" => Some(config::CrateTypeExecutable),
|
|
Some(_) => {
|
|
session.add_lint(lint::builtin::UNKNOWN_CRATE_TYPES,
|
|
ast::CRATE_NODE_ID,
|
|
a.span,
|
|
"invalid `crate_type` \
|
|
value".to_string());
|
|
None
|
|
}
|
|
_ => {
|
|
session.add_lint(lint::builtin::UNKNOWN_CRATE_TYPES,
|
|
ast::CRATE_NODE_ID,
|
|
a.span,
|
|
"`crate_type` requires a \
|
|
value".to_string());
|
|
None
|
|
}
|
|
}
|
|
} else {
|
|
None
|
|
}
|
|
}).collect();
|
|
|
|
// If we're generating a test executable, then ignore all other output
|
|
// styles at all other locations
|
|
if session.opts.test {
|
|
return vec!(config::CrateTypeExecutable)
|
|
}
|
|
|
|
// Only check command line flags if present. If no types are specified by
|
|
// command line, then reuse the empty `base` Vec to hold the types that
|
|
// will be found in crate attributes.
|
|
let mut base = session.opts.crate_types.clone();
|
|
if base.len() == 0 {
|
|
base.extend(attr_types.into_iter());
|
|
if base.len() == 0 {
|
|
base.push(link::default_output_for_target(session));
|
|
}
|
|
base.sort();
|
|
base.dedup();
|
|
}
|
|
|
|
base.into_iter().filter(|crate_type| {
|
|
let res = !link::invalid_output_for_target(session, *crate_type);
|
|
|
|
if !res {
|
|
session.warn(&format!("dropping unsupported crate type `{:?}` \
|
|
for target `{}`",
|
|
*crate_type, session.opts.target_triple)[]);
|
|
}
|
|
|
|
res
|
|
}).collect()
|
|
}
|
|
|
|
pub fn collect_crate_metadata(session: &Session,
|
|
_attrs: &[ast::Attribute]) -> Vec<String> {
|
|
session.opts.cg.metadata.clone()
|
|
}
|
|
|
|
pub fn build_output_filenames(input: &Input,
|
|
odir: &Option<Path>,
|
|
ofile: &Option<Path>,
|
|
attrs: &[ast::Attribute],
|
|
sess: &Session)
|
|
-> OutputFilenames {
|
|
match *ofile {
|
|
None => {
|
|
// "-" as input file will cause the parser to read from stdin so we
|
|
// have to make up a name
|
|
// We want to toss everything after the final '.'
|
|
let dirpath = match *odir {
|
|
Some(ref d) => d.clone(),
|
|
None => Path::new(".")
|
|
};
|
|
|
|
// If a crate name is present, we use it as the link name
|
|
let stem = sess.opts.crate_name.clone().or_else(|| {
|
|
attr::find_crate_name(attrs).map(|n| n.get().to_string())
|
|
}).unwrap_or(input.filestem());
|
|
|
|
OutputFilenames {
|
|
out_directory: dirpath,
|
|
out_filestem: stem,
|
|
single_output_file: None,
|
|
extra: sess.opts.cg.extra_filename.clone(),
|
|
}
|
|
}
|
|
|
|
Some(ref out_file) => {
|
|
let ofile = if sess.opts.output_types.len() > 1 {
|
|
sess.warn("ignoring specified output filename because multiple \
|
|
outputs were requested");
|
|
None
|
|
} else {
|
|
Some(out_file.clone())
|
|
};
|
|
if *odir != None {
|
|
sess.warn("ignoring --out-dir flag due to -o flag.");
|
|
}
|
|
OutputFilenames {
|
|
out_directory: out_file.dir_path(),
|
|
out_filestem: out_file.filestem_str().unwrap().to_string(),
|
|
single_output_file: ofile,
|
|
extra: sess.opts.cg.extra_filename.clone(),
|
|
}
|
|
}
|
|
}
|
|
}
|