/
driver.rs
1219 lines (1090 loc) · 43.5 KB
/
driver.rs
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// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use back::link;
use back::{arm, x86, x86_64, mips};
use driver::session::{Aggressive, CrateTypeExecutable, FullDebugInfo, NoDebugInfo};
use driver::session::{Session, Session_, No, Less, Default};
use driver::session;
use front;
use lib::llvm::llvm;
use lib::llvm::{ContextRef, ModuleRef};
use metadata::common::LinkMeta;
use metadata::{creader, filesearch};
use metadata::cstore::CStore;
use metadata::creader::Loader;
use metadata;
use middle::{trans, freevars, kind, ty, typeck, lint, astencode, reachable};
use middle;
use util::common::time;
use util::ppaux;
use serialize::{json, Encodable};
use std::cell::{Cell, RefCell};
use std::io;
use std::io::fs;
use std::io::MemReader;
use std::os;
use std::vec;
use std::vec_ng::Vec;
use std::vec_ng;
use collections::{HashMap, HashSet};
use getopts::{optopt, optmulti, optflag, optflagopt};
use getopts;
use syntax::ast;
use syntax::abi;
use syntax::attr;
use syntax::attr::{AttrMetaMethods};
use syntax::codemap;
use syntax::diagnostic;
use syntax::diagnostic::Emitter;
use syntax::ext::base::CrateLoader;
use syntax::parse;
use syntax::parse::token::InternedString;
use syntax::parse::token;
use syntax::print::{pp, pprust};
use syntax;
pub enum PpMode {
PpmNormal,
PpmExpanded,
PpmTyped,
PpmIdentified,
PpmExpandedIdentified
}
/**
* The name used for source code that doesn't originate in a file
* (e.g. source from stdin or a string)
*/
pub fn anon_src() -> ~str {
"<anon>".to_str()
}
pub fn source_name(input: &Input) -> ~str {
match *input {
// FIXME (#9639): This needs to handle non-utf8 paths
FileInput(ref ifile) => ifile.as_str().unwrap().to_str(),
StrInput(_) => anon_src()
}
}
pub fn default_configuration(sess: Session) ->
ast::CrateConfig {
let tos = match sess.targ_cfg.os {
abi::OsWin32 => InternedString::new("win32"),
abi::OsMacos => InternedString::new("macos"),
abi::OsLinux => InternedString::new("linux"),
abi::OsAndroid => InternedString::new("android"),
abi::OsFreebsd => InternedString::new("freebsd"),
};
// ARM is bi-endian, however using NDK seems to default
// to little-endian unless a flag is provided.
let (end,arch,wordsz) = match sess.targ_cfg.arch {
abi::X86 => ("little", "x86", "32"),
abi::X86_64 => ("little", "x86_64", "64"),
abi::Arm => ("little", "arm", "32"),
abi::Mips => ("big", "mips", "32")
};
let fam = match sess.targ_cfg.os {
abi::OsWin32 => InternedString::new("windows"),
_ => InternedString::new("unix")
};
let mk = attr::mk_name_value_item_str;
return vec!(// Target bindings.
attr::mk_word_item(fam.clone()),
mk(InternedString::new("target_os"), tos),
mk(InternedString::new("target_family"), fam),
mk(InternedString::new("target_arch"), InternedString::new(arch)),
mk(InternedString::new("target_endian"), InternedString::new(end)),
mk(InternedString::new("target_word_size"),
InternedString::new(wordsz))
);
}
pub fn append_configuration(cfg: &mut ast::CrateConfig,
name: InternedString) {
if !cfg.iter().any(|mi| mi.name() == name) {
cfg.push(attr::mk_word_item(name))
}
}
pub fn build_configuration(sess: Session) -> ast::CrateConfig {
// Combine the configuration requested by the session (command line) with
// some default and generated configuration items
let default_cfg = default_configuration(sess);
let mut user_cfg = sess.opts.cfg.clone();
// If the user wants a test runner, then add the test cfg
if sess.opts.test {
append_configuration(&mut user_cfg, InternedString::new("test"))
}
// If the user requested GC, then add the GC cfg
append_configuration(&mut user_cfg, if sess.opts.gc {
InternedString::new("gc")
} else {
InternedString::new("nogc")
});
return vec_ng::append(user_cfg.move_iter().collect(),
default_cfg.as_slice());
}
// Convert strings provided as --cfg [cfgspec] into a crate_cfg
fn parse_cfgspecs(cfgspecs: ~[~str])
-> ast::CrateConfig {
cfgspecs.move_iter().map(|s| {
let sess = parse::new_parse_sess();
parse::parse_meta_from_source_str("cfgspec".to_str(),
s,
Vec::new(),
sess)
}).collect::<ast::CrateConfig>()
}
pub enum Input {
/// Load source from file
FileInput(Path),
/// The string is the source
StrInput(~str)
}
pub fn phase_1_parse_input(sess: Session, cfg: ast::CrateConfig, input: &Input)
-> ast::Crate {
let krate = time(sess.time_passes(), "parsing", (), |_| {
match *input {
FileInput(ref file) => {
parse::parse_crate_from_file(&(*file), cfg.clone(), sess.parse_sess)
}
StrInput(ref src) => {
parse::parse_crate_from_source_str(anon_src(),
(*src).clone(),
cfg.clone(),
sess.parse_sess)
}
}
});
if sess.opts.debugging_opts & session::AST_JSON_NOEXPAND != 0 {
let mut stdout = io::stdout();
let mut json = json::PrettyEncoder::new(&mut stdout);
krate.encode(&mut json);
}
krate
}
// For continuing compilation after a parsed crate has been
// modified
/// Run the "early phases" of the compiler: initial `cfg` processing,
/// syntax expansion, secondary `cfg` expansion, synthesis of a test
/// harness if one is to be provided and injection of a dependency on the
/// standard library and prelude.
pub fn phase_2_configure_and_expand(sess: Session,
loader: &mut CrateLoader,
mut krate: ast::Crate)
-> (ast::Crate, syntax::ast_map::Map) {
let time_passes = sess.time_passes();
sess.building_library.set(session::building_library(sess.opts, &krate));
sess.crate_types.set(session::collect_crate_types(&sess,
krate.attrs
.as_slice()));
time(time_passes, "gated feature checking", (), |_|
front::feature_gate::check_crate(sess, &krate));
krate = time(time_passes, "crate injection", krate, |krate|
front::std_inject::maybe_inject_crates_ref(sess, krate));
// strip before expansion to allow macros to depend on
// configuration variables e.g/ in
//
// #[macro_escape] #[cfg(foo)]
// mod bar { macro_rules! baz!(() => {{}}) }
//
// baz! should not use this definition unless foo is enabled.
krate = time(time_passes, "configuration 1", krate, |krate|
front::config::strip_unconfigured_items(krate));
krate = time(time_passes, "expansion", krate, |krate| {
syntax::ext::expand::expand_crate(sess.parse_sess,
loader,
krate)
});
// dump the syntax-time crates
sess.cstore.reset();
// strip again, in case expansion added anything with a #[cfg].
krate = time(time_passes, "configuration 2", krate, |krate|
front::config::strip_unconfigured_items(krate));
krate = time(time_passes, "maybe building test harness", krate, |krate|
front::test::modify_for_testing(sess, krate));
krate = time(time_passes, "prelude injection", krate, |krate|
front::std_inject::maybe_inject_prelude(sess, krate));
let (krate, map) = time(time_passes, "assinging node ids and indexing ast", krate, |krate|
front::assign_node_ids_and_map::assign_node_ids_and_map(sess, krate));
if sess.opts.debugging_opts & session::AST_JSON != 0 {
let mut stdout = io::stdout();
let mut json = json::PrettyEncoder::new(&mut stdout);
krate.encode(&mut json);
}
(krate, map)
}
pub struct CrateAnalysis {
exp_map2: middle::resolve::ExportMap2,
exported_items: middle::privacy::ExportedItems,
public_items: middle::privacy::PublicItems,
ty_cx: ty::ctxt,
maps: astencode::Maps,
reachable: @RefCell<HashSet<ast::NodeId>>
}
/// 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(sess: Session,
krate: &ast::Crate,
ast_map: syntax::ast_map::Map) -> CrateAnalysis {
let time_passes = sess.time_passes();
time(time_passes, "external crate/lib resolution", (), |_|
creader::read_crates(sess, krate,
session::sess_os_to_meta_os(sess.targ_cfg.os),
token::get_ident_interner()));
let lang_items = time(time_passes, "language item collection", (), |_|
middle::lang_items::collect_language_items(krate, sess));
let middle::resolve::CrateMap {
def_map: def_map,
exp_map2: exp_map2,
trait_map: trait_map,
external_exports: external_exports,
last_private_map: last_private_map
} =
time(time_passes, "resolution", (), |_|
middle::resolve::resolve_crate(sess, lang_items, krate));
let named_region_map = time(time_passes, "lifetime resolution", (),
|_| middle::resolve_lifetime::krate(sess, krate));
time(time_passes, "looking for entry point", (),
|_| middle::entry::find_entry_point(sess, krate, &ast_map));
sess.macro_registrar_fn.with_mut(|r| *r =
time(time_passes, "looking for macro registrar", (), |_|
syntax::ext::registrar::find_macro_registrar(
sess.span_diagnostic, krate)));
let freevars = time(time_passes, "freevar finding", (), |_|
freevars::annotate_freevars(def_map, krate));
let region_map = time(time_passes, "region resolution", (), |_|
middle::region::resolve_crate(sess, krate));
let ty_cx = ty::mk_ctxt(sess, def_map, named_region_map, ast_map,
freevars, region_map, lang_items);
// passes are timed inside typeck
let (method_map, vtable_map) = typeck::check_crate(ty_cx, trait_map, krate);
time(time_passes, "check static items", (), |_|
middle::check_static::check_crate(ty_cx, krate));
// These next two const passes can probably be merged
time(time_passes, "const marking", (), |_|
middle::const_eval::process_crate(krate, ty_cx));
time(time_passes, "const checking", (), |_|
middle::check_const::check_crate(sess, krate, def_map,
method_map, ty_cx));
let maps = (external_exports, last_private_map);
let (exported_items, public_items) =
time(time_passes, "privacy checking", maps, |(a, b)|
middle::privacy::check_crate(ty_cx, &method_map, &exp_map2,
a, b, krate));
time(time_passes, "effect checking", (), |_|
middle::effect::check_crate(ty_cx, method_map, krate));
time(time_passes, "loop checking", (), |_|
middle::check_loop::check_crate(ty_cx, krate));
let middle::moves::MoveMaps {moves_map, moved_variables_set,
capture_map} =
time(time_passes, "compute moves", (), |_|
middle::moves::compute_moves(ty_cx, method_map, krate));
time(time_passes, "match checking", (), |_|
middle::check_match::check_crate(ty_cx, method_map,
moves_map, krate));
time(time_passes, "liveness checking", (), |_|
middle::liveness::check_crate(ty_cx, method_map,
capture_map, krate));
let root_map =
time(time_passes, "borrow checking", (), |_|
middle::borrowck::check_crate(ty_cx, method_map,
moves_map, moved_variables_set,
capture_map, krate));
time(time_passes, "kind checking", (), |_|
kind::check_crate(ty_cx, method_map, krate));
let reachable_map =
time(time_passes, "reachability checking", (), |_|
reachable::find_reachable(ty_cx, method_map, &exported_items));
{
let reachable_map = reachable_map.borrow();
time(time_passes, "death checking", (), |_| {
middle::dead::check_crate(ty_cx,
method_map,
&exported_items,
reachable_map.get(),
krate)
});
}
time(time_passes, "lint checking", (), |_|
lint::check_crate(ty_cx, method_map, &exported_items, krate));
CrateAnalysis {
exp_map2: exp_map2,
ty_cx: ty_cx,
exported_items: exported_items,
public_items: public_items,
maps: astencode::Maps {
root_map: root_map,
method_map: method_map,
vtable_map: vtable_map,
capture_map: capture_map
},
reachable: reachable_map
}
}
pub struct CrateTranslation {
context: ContextRef,
module: ModuleRef,
metadata_module: ModuleRef,
link: LinkMeta,
metadata: ~[u8],
reachable: ~[~str],
}
/// Run the translation phase to LLVM, after which the AST and analysis can
/// be discarded.
pub fn phase_4_translate_to_llvm(sess: Session,
krate: ast::Crate,
analysis: &CrateAnalysis,
outputs: &OutputFilenames) -> CrateTranslation {
time(sess.time_passes(), "translation", krate, |krate|
trans::base::trans_crate(sess, krate, analysis, outputs))
}
/// 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: &CrateTranslation,
outputs: &OutputFilenames) {
if sess.opts.cg.no_integrated_as {
let output_type = link::OutputTypeAssembly;
time(sess.time_passes(), "LLVM passes", (), |_|
link::write::run_passes(sess, trans, [output_type], outputs));
link::write::run_assembler(sess, outputs);
// Remove assembly source, unless --save-temps was specified
if !sess.opts.cg.save_temps {
fs::unlink(&outputs.temp_path(link::OutputTypeAssembly)).unwrap();
}
} else {
time(sess.time_passes(), "LLVM passes", (), |_|
link::write::run_passes(sess,
trans,
sess.opts.output_types,
outputs));
}
}
/// 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: &CrateTranslation,
outputs: &OutputFilenames) {
time(sess.time_passes(), "linking", (), |_|
link::link_binary(sess,
trans,
outputs,
&trans.link.crateid));
}
pub fn stop_after_phase_3(sess: Session) -> bool {
if sess.opts.no_trans {
debug!("invoked with --no-trans, returning early from compile_input");
return true;
}
return false;
}
pub fn stop_after_phase_1(sess: Session) -> bool {
if sess.opts.parse_only {
debug!("invoked with --parse-only, returning early from compile_input");
return true;
}
return sess.opts.debugging_opts & session::AST_JSON_NOEXPAND != 0;
}
pub fn stop_after_phase_2(sess: Session) -> bool {
if sess.opts.no_analysis {
debug!("invoked with --no-analysis, returning early from compile_input");
return true;
}
return sess.opts.debugging_opts & session::AST_JSON != 0;
}
pub fn stop_after_phase_5(sess: Session) -> bool {
if !sess.opts.output_types.iter().any(|&i| i == link::OutputTypeExe) {
debug!("not building executable, returning early from compile_input");
return true;
}
return false;
}
fn write_out_deps(sess: Session,
input: &Input,
outputs: &OutputFilenames,
krate: &ast::Crate) -> io::IoResult<()> {
let id = link::find_crate_id(krate.attrs.as_slice(), outputs);
let mut out_filenames = ~[];
for output_type in sess.opts.output_types.iter() {
let file = outputs.path(*output_type);
match *output_type {
link::OutputTypeExe => {
let crate_types = sess.crate_types.borrow();
for output in crate_types.get().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 {
FileInput(..) => outputs.with_extension("d"),
StrInput(..) => {
sess.warn("can not write --dep-info without a filename \
when compiling stdin.");
return Ok(());
},
},
_ => return Ok(()),
};
// Build a list of files used to compile the output and
// write Makefile-compatible dependency rules
let files: ~[~str] = {
let files = sess.codemap.files.borrow();
files.get()
.iter()
.filter_map(|fmap| {
if fmap.is_real_file() {
Some(fmap.name.clone())
} else {
None
}
})
.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(())
}
pub fn compile_input(sess: Session, cfg: ast::CrateConfig, input: &Input,
outdir: &Option<Path>, output: &Option<Path>) {
// We need nested scopes here, because the intermediate results can keep
// large chunks of memory alive and we want to free them as soon as
// possible to keep the peak memory usage low
let (outputs, trans) = {
let (expanded_crate, ast_map) = {
let krate = phase_1_parse_input(sess, cfg, input);
if sess.show_span() {
front::show_span::run(sess, &krate);
return;
}
if stop_after_phase_1(sess) { return; }
let loader = &mut Loader::new(sess);
phase_2_configure_and_expand(sess, loader, krate)
};
let outputs = build_output_filenames(input,
outdir,
output,
expanded_crate.attrs.as_slice(),
sess);
write_out_deps(sess, input, &outputs, &expanded_crate).unwrap();
if stop_after_phase_2(sess) { return; }
let analysis = phase_3_run_analysis_passes(sess, &expanded_crate, ast_map);
if stop_after_phase_3(sess) { return; }
let trans = phase_4_translate_to_llvm(sess, expanded_crate,
&analysis, &outputs);
(outputs, trans)
};
phase_5_run_llvm_passes(sess, &trans, &outputs);
if stop_after_phase_5(sess) { return; }
phase_6_link_output(sess, &trans, &outputs);
}
struct IdentifiedAnnotation;
impl pprust::PpAnn for IdentifiedAnnotation {
fn pre(&self, node: pprust::AnnNode) -> io::IoResult<()> {
match node {
pprust::NodeExpr(s, _) => pprust::popen(s),
_ => Ok(())
}
}
fn post(&self, node: pprust::AnnNode) -> io::IoResult<()> {
match node {
pprust::NodeItem(s, item) => {
try!(pp::space(&mut s.s));
try!(pprust::synth_comment(s, item.id.to_str()));
}
pprust::NodeBlock(s, blk) => {
try!(pp::space(&mut s.s));
try!(pprust::synth_comment(s, ~"block " + blk.id.to_str()));
}
pprust::NodeExpr(s, expr) => {
try!(pp::space(&mut s.s));
try!(pprust::synth_comment(s, expr.id.to_str()));
try!(pprust::pclose(s));
}
pprust::NodePat(s, pat) => {
try!(pp::space(&mut s.s));
try!(pprust::synth_comment(s, ~"pat " + pat.id.to_str()));
}
}
Ok(())
}
}
struct TypedAnnotation {
analysis: CrateAnalysis,
}
impl pprust::PpAnn for TypedAnnotation {
fn pre(&self, node: pprust::AnnNode) -> io::IoResult<()> {
match node {
pprust::NodeExpr(s, _) => pprust::popen(s),
_ => Ok(())
}
}
fn post(&self, node: pprust::AnnNode) -> io::IoResult<()> {
let tcx = self.analysis.ty_cx;
match node {
pprust::NodeExpr(s, expr) => {
try!(pp::space(&mut s.s));
try!(pp::word(&mut s.s, "as"));
try!(pp::space(&mut s.s));
try!(pp::word(&mut s.s,
ppaux::ty_to_str(tcx, ty::expr_ty(tcx, expr))));
try!(pprust::pclose(s));
}
_ => ()
}
Ok(())
}
}
pub fn pretty_print_input(sess: Session,
cfg: ast::CrateConfig,
input: &Input,
ppm: PpMode) {
let krate = phase_1_parse_input(sess, cfg, input);
let (krate, ast_map, is_expanded) = match ppm {
PpmExpanded | PpmExpandedIdentified | PpmTyped => {
let loader = &mut Loader::new(sess);
let (krate, ast_map) = phase_2_configure_and_expand(sess, loader, krate);
(krate, Some(ast_map), true)
}
_ => (krate, None, false)
};
let annotation = match ppm {
PpmIdentified | PpmExpandedIdentified => {
~IdentifiedAnnotation as ~pprust::PpAnn
}
PpmTyped => {
let ast_map = ast_map.expect("--pretty=typed missing ast_map");
let analysis = phase_3_run_analysis_passes(sess, &krate, ast_map);
~TypedAnnotation {
analysis: analysis
} as ~pprust::PpAnn:
}
_ => ~pprust::NoAnn as ~pprust::PpAnn:,
};
let src = &sess.codemap.get_filemap(source_name(input)).src;
let mut rdr = MemReader::new(src.as_bytes().to_owned());
let stdout = io::stdout();
pprust::print_crate(sess.codemap,
sess.span_diagnostic,
&krate,
source_name(input),
&mut rdr,
~stdout as ~io::Writer,
annotation,
is_expanded).unwrap();
}
pub fn get_os(triple: &str) -> Option<abi::Os> {
for &(name, os) in os_names.iter() {
if triple.contains(name) { return Some(os) }
}
None
}
static os_names : &'static [(&'static str, abi::Os)] = &'static [
("mingw32", abi::OsWin32),
("win32", abi::OsWin32),
("darwin", abi::OsMacos),
("android", abi::OsAndroid),
("linux", abi::OsLinux),
("freebsd", abi::OsFreebsd)];
pub fn get_arch(triple: &str) -> Option<abi::Architecture> {
for &(arch, abi) in architecture_abis.iter() {
if triple.contains(arch) { return Some(abi) }
}
None
}
static architecture_abis : &'static [(&'static str, abi::Architecture)] = &'static [
("i386", abi::X86),
("i486", abi::X86),
("i586", abi::X86),
("i686", abi::X86),
("i786", abi::X86),
("x86_64", abi::X86_64),
("arm", abi::Arm),
("xscale", abi::Arm),
("thumb", abi::Arm),
("mips", abi::Mips)];
pub fn build_target_config(sopts: @session::Options)
-> @session::Config {
let os = match get_os(sopts.target_triple) {
Some(os) => os,
None => early_error("unknown operating system")
};
let arch = match get_arch(sopts.target_triple) {
Some(arch) => arch,
None => early_error("unknown architecture: " + sopts.target_triple)
};
let (int_type, uint_type) = match arch {
abi::X86 => (ast::TyI32, ast::TyU32),
abi::X86_64 => (ast::TyI64, ast::TyU64),
abi::Arm => (ast::TyI32, ast::TyU32),
abi::Mips => (ast::TyI32, ast::TyU32)
};
let target_triple = sopts.target_triple.clone();
let target_strs = match arch {
abi::X86 => x86::get_target_strs(target_triple, os),
abi::X86_64 => x86_64::get_target_strs(target_triple, os),
abi::Arm => arm::get_target_strs(target_triple, os),
abi::Mips => mips::get_target_strs(target_triple, os)
};
let target_cfg = @session::Config {
os: os,
arch: arch,
target_strs: target_strs,
int_type: int_type,
uint_type: uint_type,
};
return target_cfg;
}
pub fn host_triple() -> ~str {
// Get the host triple out of the build environment. This ensures that our
// idea of the host triple is the same as for the set of libraries we've
// actually built. We can't just take LLVM's host triple because they
// normalize all ix86 architectures to i386.
//
// Instead of grabbing the host triple (for the current host), we grab (at
// compile time) the target triple that this rustc is built with and
// calling that (at runtime) the host triple.
(env!("CFG_COMPILER")).to_owned()
}
pub fn build_session_options(matches: &getopts::Matches)
-> @session::Options {
let crate_types = matches.opt_strs("crate-type").flat_map(|s| {
s.split(',').map(|part| {
match part {
"lib" => session::default_lib_output(),
"rlib" => session::CrateTypeRlib,
"staticlib" => session::CrateTypeStaticlib,
"dylib" => session::CrateTypeDylib,
"bin" => session::CrateTypeExecutable,
_ => early_error(format!("unknown crate type: `{}`", part))
}
}).collect()
});
let parse_only = matches.opt_present("parse-only");
let no_trans = matches.opt_present("no-trans");
let no_analysis = matches.opt_present("no-analysis");
let lint_levels = [lint::allow, lint::warn,
lint::deny, lint::forbid];
let mut lint_opts = ~[];
let lint_dict = lint::get_lint_dict();
for level in lint_levels.iter() {
let level_name = lint::level_to_str(*level);
let level_short = level_name.slice_chars(0, 1);
let level_short = level_short.to_ascii().to_upper().into_str();
let flags = vec::append(matches.opt_strs(level_short),
matches.opt_strs(level_name));
for lint_name in flags.iter() {
let lint_name = lint_name.replace("-", "_");
match lint_dict.find_equiv(&lint_name) {
None => {
early_error(format!("unknown {} flag: {}",
level_name, lint_name));
}
Some(lint) => {
lint_opts.push((lint.lint, *level));
}
}
}
}
let mut debugging_opts = 0;
let debug_flags = matches.opt_strs("Z");
let debug_map = session::debugging_opts_map();
for debug_flag in debug_flags.iter() {
let mut this_bit = 0;
for tuple in debug_map.iter() {
let (name, bit) = match *tuple { (ref a, _, b) => (a, b) };
if *name == *debug_flag { this_bit = bit; break; }
}
if this_bit == 0 {
early_error(format!("unknown debug flag: {}", *debug_flag))
}
debugging_opts |= this_bit;
}
if debugging_opts & session::DEBUG_LLVM != 0 {
unsafe { llvm::LLVMSetDebug(1); }
}
let mut output_types = if parse_only || no_trans {
~[]
} else {
matches.opt_strs("emit").flat_map(|s| {
s.split(',').map(|part| {
match part.as_slice() {
"asm" => link::OutputTypeAssembly,
"ir" => link::OutputTypeLlvmAssembly,
"bc" => link::OutputTypeBitcode,
"obj" => link::OutputTypeObject,
"link" => link::OutputTypeExe,
_ => early_error(format!("unknown emission type: `{}`", part))
}
}).collect()
})
};
output_types.sort();
output_types.dedup();
if output_types.len() == 0 {
output_types.push(link::OutputTypeExe);
}
let sysroot_opt = matches.opt_str("sysroot").map(|m| @Path::new(m));
let target = matches.opt_str("target").unwrap_or(host_triple());
let opt_level = {
if (debugging_opts & session::NO_OPT) != 0 {
No
} else if matches.opt_present("O") {
if matches.opt_present("opt-level") {
early_error("-O and --opt-level both provided");
}
Default
} else if matches.opt_present("opt-level") {
match matches.opt_str("opt-level").unwrap() {
~"0" => No,
~"1" => Less,
~"2" => Default,
~"3" => Aggressive,
_ => {
early_error("optimization level needs to be between 0-3")
}
}
} else { No }
};
let gc = debugging_opts & session::GC != 0;
let debuginfo = if matches.opt_present("g") || matches.opt_present("debuginfo") {
FullDebugInfo
} else {
NoDebugInfo
};
let addl_lib_search_paths = matches.opt_strs("L").map(|s| {
Path::new(s.as_slice())
}).move_iter().collect();
let cfg = parse_cfgspecs(matches.opt_strs("cfg"));
let test = matches.opt_present("test");
let write_dependency_info = (matches.opt_present("dep-info"),
matches.opt_str("dep-info").map(|p| Path::new(p)));
let print_metas = (matches.opt_present("crate-id"),
matches.opt_present("crate-name"),
matches.opt_present("crate-file-name"));
let cg = build_codegen_options(matches);
let sopts = @session::Options {
crate_types: crate_types,
gc: gc,
optimize: opt_level,
debuginfo: debuginfo,
lint_opts: lint_opts,
output_types: output_types,
addl_lib_search_paths: @RefCell::new(addl_lib_search_paths),
maybe_sysroot: sysroot_opt,
target_triple: target,
cfg: cfg,
test: test,
parse_only: parse_only,
no_trans: no_trans,
no_analysis: no_analysis,
debugging_opts: debugging_opts,
write_dependency_info: write_dependency_info,
print_metas: print_metas,
cg: cg,
};
return sopts;
}
pub fn build_codegen_options(matches: &getopts::Matches)
-> session::CodegenOptions
{
let mut cg = session::basic_codegen_options();
for option in matches.opt_strs("C").move_iter() {
let mut iter = option.splitn('=', 1);
let key = iter.next().unwrap();
let value = iter.next();
let option_to_lookup = key.replace("-", "_");
let mut found = false;
for &(candidate, setter, _) in session::CG_OPTIONS.iter() {
if option_to_lookup.as_slice() != candidate { continue }
if !setter(&mut cg, value) {
match value {
Some(..) => early_error(format!("codegen option `{}` takes \
no value", key)),
None => early_error(format!("codegen option `{0}` requires \
a value (-C {0}=<value>)",
key))
}
}
found = true;
break;
}
if !found {
early_error(format!("unknown codegen option: `{}`", key));
}
}
return cg;
}
pub fn build_session(sopts: @session::Options,
local_crate_source_file: Option<Path>)
-> Session {
let codemap = @codemap::CodeMap::new();
let diagnostic_handler =
diagnostic::default_handler();
let span_diagnostic_handler =
diagnostic::mk_span_handler(diagnostic_handler, codemap);
build_session_(sopts, local_crate_source_file, codemap, span_diagnostic_handler)
}
pub fn build_session_(sopts: @session::Options,
local_crate_source_file: Option<Path>,
codemap: @codemap::CodeMap,
span_diagnostic_handler: @diagnostic::SpanHandler)
-> Session {
let target_cfg = build_target_config(sopts);
let p_s = parse::new_parse_sess_special_handler(span_diagnostic_handler, codemap);
let cstore = @CStore::new(token::get_ident_interner());
let filesearch = @filesearch::FileSearch::new(
&sopts.maybe_sysroot,
sopts.target_triple,
sopts.addl_lib_search_paths);
// Make the path absolute, if necessary
let local_crate_source_file = local_crate_source_file.map(|path|
if path.is_absolute() {
path.clone()
} else {
os::getcwd().join(path.clone())
}
);
@Session_ {
targ_cfg: target_cfg,
opts: sopts,
cstore: cstore,
parse_sess: p_s,
codemap: codemap,
// For a library crate, this is always none
entry_fn: RefCell::new(None),
entry_type: Cell::new(None),
macro_registrar_fn: RefCell::new(None),
span_diagnostic: span_diagnostic_handler,
filesearch: filesearch,
building_library: Cell::new(false),
local_crate_source_file: local_crate_source_file,
working_dir: os::getcwd(),
lints: RefCell::new(HashMap::new()),
node_id: Cell::new(1),
crate_types: @RefCell::new(~[]),
features: front::feature_gate::Features::new()
}
}
pub fn parse_pretty(sess: Session, name: &str) -> PpMode {
match name {
&"normal" => PpmNormal,