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pub use self::code_stats::{CodeStats, DataTypeKind, FieldInfo};
pub use self::code_stats::{SizeKind, TypeSizeInfo, VariantInfo};
use dep_graph::DepGraph;
use hir::def_id::{CrateNum, DefIndex};
use hir::svh::Svh;
use lint;
use middle::cstore::CrateStore;
use middle::dependency_format;
use session::search_paths::PathKind;
use session::config::DebugInfoLevel;
use ty::tls;
use util::nodemap::{FxHashMap, FxHashSet};
use util::common::duration_to_secs_str;
use mir::transform as mir_pass;
use syntax::ast::NodeId;
use errors::{self, DiagnosticBuilder};
use errors::emitter::{Emitter, EmitterWriter};
use syntax::json::JsonEmitter;
use syntax::feature_gate;
use syntax::parse;
use syntax::parse::ParseSess;
use syntax::symbol::Symbol;
use syntax::{ast, codemap};
use syntax::feature_gate::AttributeType;
use syntax_pos::{Span, MultiSpan};
use rustc_back::PanicStrategy;
use rustc_back::target::Target;
use rustc_data_structures::flock;
use llvm;
use std::path::{Path, PathBuf};
use std::cell::{self, Cell, RefCell};
use std::collections::HashMap;
use std::env;
use std::ffi::CString;
use std::io::Write;
use std::rc::Rc;
use std::fmt;
use std::time::Duration;
use libc::c_int;
mod code_stats;
pub mod config;
pub mod filesearch;
pub mod search_paths;
pub struct Session {
pub dep_graph: DepGraph,
pub target: config::Config,
pub host: Target,
pub opts: config::Options,
pub cstore: Rc<CrateStore>,
pub parse_sess: ParseSess,
pub entry_fn: RefCell<Option<(NodeId, Span)>>,
pub entry_type: Cell<Option<config::EntryFnType>>,
pub plugin_registrar_fn: Cell<Option<ast::NodeId>>,
pub derive_registrar_fn: Cell<Option<ast::NodeId>>,
pub default_sysroot: Option<PathBuf>,
pub local_crate_source_file: Option<PathBuf>,
pub working_dir: PathBuf,
pub lint_store: RefCell<lint::LintStore>,
pub lints: RefCell<lint::LintTable>,
pub one_time_diagnostics: RefCell<FxHashSet<(lint::LintId, Span, String)>>,
pub plugin_llvm_passes: RefCell<Vec<String>>,
pub mir_passes: RefCell<mir_pass::Passes>,
pub plugin_attributes: RefCell<Vec<(String, AttributeType)>>,
pub crate_types: RefCell<Vec<config::CrateType>>,
pub dependency_formats: RefCell<dependency_format::Dependencies>,
pub crate_disambiguator: RefCell<Symbol>,
pub features: RefCell<feature_gate::Features>,
pub recursion_limit: Cell<usize>,
pub type_length_limit: Cell<usize>,
pub injected_allocator: Cell<Option<CrateNum>>,
pub injected_panic_runtime: Cell<Option<CrateNum>>,
pub imported_macro_spans: RefCell<HashMap<Span, (String, Span)>>,
incr_comp_session: RefCell<IncrCompSession>,
pub perf_stats: PerfStats,
pub code_stats: RefCell<CodeStats>,
next_node_id: Cell<ast::NodeId>,
}
pub struct PerfStats {
pub svh_time: Cell<Duration>,
pub incr_comp_hashes_time: Cell<Duration>,
pub incr_comp_hashes_count: Cell<u64>,
pub incr_comp_bytes_hashed: Cell<u64>,
pub symbol_hash_time: Cell<Duration>,
pub decode_def_path_tables_time: Cell<Duration>,
}
impl Session {
pub fn local_crate_disambiguator(&self) -> Symbol {
*self.crate_disambiguator.borrow()
}
pub fn struct_span_warn<'a, S: Into<MultiSpan>>(&'a self,
sp: S,
msg: &str)
-> DiagnosticBuilder<'a> {
self.diagnostic().struct_span_warn(sp, msg)
}
pub fn struct_span_warn_with_code<'a, S: Into<MultiSpan>>(&'a self,
sp: S,
msg: &str,
code: &str)
-> DiagnosticBuilder<'a> {
self.diagnostic().struct_span_warn_with_code(sp, msg, code)
}
pub fn struct_warn<'a>(&'a self, msg: &str) -> DiagnosticBuilder<'a> {
self.diagnostic().struct_warn(msg)
}
pub fn struct_span_err<'a, S: Into<MultiSpan>>(&'a self,
sp: S,
msg: &str)
-> DiagnosticBuilder<'a> {
self.diagnostic().struct_span_err(sp, msg)
}
pub fn struct_span_err_with_code<'a, S: Into<MultiSpan>>(&'a self,
sp: S,
msg: &str,
code: &str)
-> DiagnosticBuilder<'a> {
self.diagnostic().struct_span_err_with_code(sp, msg, code)
}
pub fn struct_err<'a>(&'a self, msg: &str) -> DiagnosticBuilder<'a> {
self.diagnostic().struct_err(msg)
}
pub fn struct_span_fatal<'a, S: Into<MultiSpan>>(&'a self,
sp: S,
msg: &str)
-> DiagnosticBuilder<'a> {
self.diagnostic().struct_span_fatal(sp, msg)
}
pub fn struct_span_fatal_with_code<'a, S: Into<MultiSpan>>(&'a self,
sp: S,
msg: &str,
code: &str)
-> DiagnosticBuilder<'a> {
self.diagnostic().struct_span_fatal_with_code(sp, msg, code)
}
pub fn struct_fatal<'a>(&'a self, msg: &str) -> DiagnosticBuilder<'a> {
self.diagnostic().struct_fatal(msg)
}
pub fn span_fatal<S: Into<MultiSpan>>(&self, sp: S, msg: &str) -> ! {
panic!(self.diagnostic().span_fatal(sp, msg))
}
pub fn span_fatal_with_code<S: Into<MultiSpan>>(&self, sp: S, msg: &str, code: &str) -> ! {
panic!(self.diagnostic().span_fatal_with_code(sp, msg, code))
}
pub fn fatal(&self, msg: &str) -> ! {
panic!(self.diagnostic().fatal(msg))
}
pub fn span_err_or_warn<S: Into<MultiSpan>>(&self, is_warning: bool, sp: S, msg: &str) {
if is_warning {
self.span_warn(sp, msg);
} else {
self.span_err(sp, msg);
}
}
pub fn span_err<S: Into<MultiSpan>>(&self, sp: S, msg: &str) {
self.diagnostic().span_err(sp, msg)
}
pub fn span_err_with_code<S: Into<MultiSpan>>(&self, sp: S, msg: &str, code: &str) {
self.diagnostic().span_err_with_code(sp, &msg, code)
}
pub fn err(&self, msg: &str) {
self.diagnostic().err(msg)
}
pub fn err_count(&self) -> usize {
self.diagnostic().err_count()
}
pub fn has_errors(&self) -> bool {
self.diagnostic().has_errors()
}
pub fn abort_if_errors(&self) {
self.diagnostic().abort_if_errors();
}
pub fn track_errors<F, T>(&self, f: F) -> Result<T, usize>
where F: FnOnce() -> T
{
let old_count = self.err_count();
let result = f();
let errors = self.err_count() - old_count;
if errors == 0 {
Ok(result)
} else {
Err(errors)
}
}
pub fn span_warn<S: Into<MultiSpan>>(&self, sp: S, msg: &str) {
self.diagnostic().span_warn(sp, msg)
}
pub fn span_warn_with_code<S: Into<MultiSpan>>(&self, sp: S, msg: &str, code: &str) {
self.diagnostic().span_warn_with_code(sp, msg, code)
}
pub fn warn(&self, msg: &str) {
self.diagnostic().warn(msg)
}
pub fn opt_span_warn<S: Into<MultiSpan>>(&self, opt_sp: Option<S>, msg: &str) {
match opt_sp {
Some(sp) => self.span_warn(sp, msg),
None => self.warn(msg),
}
}
pub fn delay_span_bug<S: Into<MultiSpan>>(&self, sp: S, msg: &str) {
self.diagnostic().delay_span_bug(sp, msg)
}
pub fn note_without_error(&self, msg: &str) {
self.diagnostic().note_without_error(msg)
}
pub fn span_note_without_error<S: Into<MultiSpan>>(&self, sp: S, msg: &str) {
self.diagnostic().span_note_without_error(sp, msg)
}
pub fn span_unimpl<S: Into<MultiSpan>>(&self, sp: S, msg: &str) -> ! {
self.diagnostic().span_unimpl(sp, msg)
}
pub fn unimpl(&self, msg: &str) -> ! {
self.diagnostic().unimpl(msg)
}
pub fn add_lint<S: Into<MultiSpan>>(&self,
lint: &'static lint::Lint,
id: ast::NodeId,
sp: S,
msg: String)
{
self.lints.borrow_mut().add_lint(lint, id, sp, msg);
}
pub fn add_lint_diagnostic<M>(&self,
lint: &'static lint::Lint,
id: ast::NodeId,
msg: M)
where M: lint::IntoEarlyLint,
{
self.lints.borrow_mut().add_lint_diagnostic(lint, id, msg);
}
pub fn reserve_node_ids(&self, count: usize) -> ast::NodeId {
let id = self.next_node_id.get();
match id.as_usize().checked_add(count) {
Some(next) => {
self.next_node_id.set(ast::NodeId::new(next));
}
None => bug!("Input too large, ran out of node ids!")
}
id
}
pub fn next_node_id(&self) -> NodeId {
self.reserve_node_ids(1)
}
pub fn diagnostic<'a>(&'a self) -> &'a errors::Handler {
&self.parse_sess.span_diagnostic
}
pub fn diag_span_note_once<'a, 'b>(&'a self,
diag_builder: &'b mut DiagnosticBuilder<'a>,
lint: &'static lint::Lint, span: Span, message: &str) {
match self.opts.error_format {
config::ErrorOutputType::Json => {
diag_builder.span_note(span, &message);
},
_ => {
let lint_id = lint::LintId::of(lint);
let id_span_message = (lint_id, span, message.to_owned());
let fresh = self.one_time_diagnostics.borrow_mut().insert(id_span_message);
if fresh {
diag_builder.span_note(span, &message);
}
}
}
}
pub fn codemap<'a>(&'a self) -> &'a codemap::CodeMap {
self.parse_sess.codemap()
}
pub fn verbose(&self) -> bool { self.opts.debugging_opts.verbose }
pub fn time_passes(&self) -> bool { self.opts.debugging_opts.time_passes }
pub fn count_llvm_insns(&self) -> bool {
self.opts.debugging_opts.count_llvm_insns
}
pub fn time_llvm_passes(&self) -> bool {
self.opts.debugging_opts.time_llvm_passes
}
pub fn trans_stats(&self) -> bool { self.opts.debugging_opts.trans_stats }
pub fn meta_stats(&self) -> bool { self.opts.debugging_opts.meta_stats }
pub fn asm_comments(&self) -> bool { self.opts.debugging_opts.asm_comments }
pub fn no_verify(&self) -> bool { self.opts.debugging_opts.no_verify }
pub fn borrowck_stats(&self) -> bool { self.opts.debugging_opts.borrowck_stats }
pub fn print_llvm_passes(&self) -> bool {
self.opts.debugging_opts.print_llvm_passes
}
pub fn lto(&self) -> bool {
self.opts.cg.lto
}
pub fn panic_strategy(&self) -> PanicStrategy {
self.opts.cg.panic.unwrap_or(self.target.target.options.panic_strategy)
}
pub fn no_landing_pads(&self) -> bool {
self.opts.debugging_opts.no_landing_pads || self.panic_strategy() == PanicStrategy::Abort
}
pub fn unstable_options(&self) -> bool {
self.opts.debugging_opts.unstable_options
}
pub fn nonzeroing_move_hints(&self) -> bool {
self.opts.debugging_opts.enable_nonzeroing_move_hints
}
pub fn overflow_checks(&self) -> bool {
self.opts.cg.overflow_checks
.or(self.opts.debugging_opts.force_overflow_checks)
.unwrap_or(self.opts.debug_assertions)
}
pub fn must_not_eliminate_frame_pointers(&self) -> bool {
self.opts.debuginfo != DebugInfoLevel::NoDebugInfo ||
!self.target.target.options.eliminate_frame_pointer
}
pub fn generate_plugin_registrar_symbol(&self, svh: &Svh, index: DefIndex)
-> String {
format!("__rustc_plugin_registrar__{}_{}", svh, index.as_usize())
}
pub fn generate_derive_registrar_symbol(&self,
svh: &Svh,
index: DefIndex) -> String {
format!("__rustc_derive_registrar__{}_{}", svh, index.as_usize())
}
pub fn sysroot<'a>(&'a self) -> &'a Path {
match self.opts.maybe_sysroot {
Some (ref sysroot) => sysroot,
None => self.default_sysroot.as_ref()
.expect("missing sysroot and default_sysroot in Session")
}
}
pub fn target_filesearch(&self, kind: PathKind) -> filesearch::FileSearch {
filesearch::FileSearch::new(self.sysroot(),
&self.opts.target_triple,
&self.opts.search_paths,
kind)
}
pub fn host_filesearch(&self, kind: PathKind) -> filesearch::FileSearch {
filesearch::FileSearch::new(
self.sysroot(),
config::host_triple(),
&self.opts.search_paths,
kind)
}
pub fn init_incr_comp_session(&self,
session_dir: PathBuf,
lock_file: flock::Lock) {
let mut incr_comp_session = self.incr_comp_session.borrow_mut();
if let IncrCompSession::NotInitialized = *incr_comp_session { } else {
bug!("Trying to initialize IncrCompSession `{:?}`", *incr_comp_session)
}
*incr_comp_session = IncrCompSession::Active {
session_directory: session_dir,
lock_file: lock_file,
};
}
pub fn finalize_incr_comp_session(&self, new_directory_path: PathBuf) {
let mut incr_comp_session = self.incr_comp_session.borrow_mut();
if let IncrCompSession::Active { .. } = *incr_comp_session { } else {
bug!("Trying to finalize IncrCompSession `{:?}`", *incr_comp_session)
}
*incr_comp_session = IncrCompSession::Finalized {
session_directory: new_directory_path,
};
}
pub fn mark_incr_comp_session_as_invalid(&self) {
let mut incr_comp_session = self.incr_comp_session.borrow_mut();
let session_directory = match *incr_comp_session {
IncrCompSession::Active { ref session_directory, .. } => {
session_directory.clone()
}
_ => bug!("Trying to invalidate IncrCompSession `{:?}`",
*incr_comp_session),
};
*incr_comp_session = IncrCompSession::InvalidBecauseOfErrors {
session_directory: session_directory
};
}
pub fn incr_comp_session_dir(&self) -> cell::Ref<PathBuf> {
let incr_comp_session = self.incr_comp_session.borrow();
cell::Ref::map(incr_comp_session, |incr_comp_session| {
match *incr_comp_session {
IncrCompSession::NotInitialized => {
bug!("Trying to get session directory from IncrCompSession `{:?}`",
*incr_comp_session)
}
IncrCompSession::Active { ref session_directory, .. } |
IncrCompSession::Finalized { ref session_directory } |
IncrCompSession::InvalidBecauseOfErrors { ref session_directory } => {
session_directory
}
}
})
}
pub fn incr_comp_session_dir_opt(&self) -> Option<cell::Ref<PathBuf>> {
if self.opts.incremental.is_some() {
Some(self.incr_comp_session_dir())
} else {
None
}
}
pub fn print_perf_stats(&self) {
println!("Total time spent computing SVHs: {}",
duration_to_secs_str(self.perf_stats.svh_time.get()));
println!("Total time spent computing incr. comp. hashes: {}",
duration_to_secs_str(self.perf_stats.incr_comp_hashes_time.get()));
println!("Total number of incr. comp. hashes computed: {}",
self.perf_stats.incr_comp_hashes_count.get());
println!("Total number of bytes hashed for incr. comp.: {}",
self.perf_stats.incr_comp_bytes_hashed.get());
println!("Average bytes hashed per incr. comp. HIR node: {}",
self.perf_stats.incr_comp_bytes_hashed.get() /
self.perf_stats.incr_comp_hashes_count.get());
println!("Total time spent computing symbol hashes: {}",
duration_to_secs_str(self.perf_stats.symbol_hash_time.get()));
println!("Total time spent decoding DefPath tables: {}",
duration_to_secs_str(self.perf_stats.decode_def_path_tables_time.get()));
}
}
pub fn build_session(sopts: config::Options,
dep_graph: &DepGraph,
local_crate_source_file: Option<PathBuf>,
registry: errors::registry::Registry,
cstore: Rc<CrateStore>)
-> Session {
build_session_with_codemap(sopts,
dep_graph,
local_crate_source_file,
registry,
cstore,
Rc::new(codemap::CodeMap::new()),
None)
}
pub fn build_session_with_codemap(sopts: config::Options,
dep_graph: &DepGraph,
local_crate_source_file: Option<PathBuf>,
registry: errors::registry::Registry,
cstore: Rc<CrateStore>,
codemap: Rc<codemap::CodeMap>,
emitter_dest: Option<Box<Write + Send>>)
-> Session {
let can_print_warnings = sopts.lint_opts
.iter()
.filter(|&&(ref key, _)| *key == "warnings")
.map(|&(_, ref level)| *level != lint::Allow)
.last()
.unwrap_or(true);
let treat_err_as_bug = sopts.debugging_opts.treat_err_as_bug;
let emitter: Box<Emitter> = match (sopts.error_format, emitter_dest) {
(config::ErrorOutputType::HumanReadable(color_config), None) => {
Box::new(EmitterWriter::stderr(color_config,
Some(codemap.clone())))
}
(config::ErrorOutputType::HumanReadable(_), Some(dst)) => {
Box::new(EmitterWriter::new(dst,
Some(codemap.clone())))
}
(config::ErrorOutputType::Json, None) => {
Box::new(JsonEmitter::stderr(Some(registry), codemap.clone()))
}
(config::ErrorOutputType::Json, Some(dst)) => {
Box::new(JsonEmitter::new(dst, Some(registry), codemap.clone()))
}
};
let diagnostic_handler =
errors::Handler::with_emitter(can_print_warnings,
treat_err_as_bug,
emitter);
build_session_(sopts,
dep_graph,
local_crate_source_file,
diagnostic_handler,
codemap,
cstore)
}
pub fn build_session_(sopts: config::Options,
dep_graph: &DepGraph,
local_crate_source_file: Option<PathBuf>,
span_diagnostic: errors::Handler,
codemap: Rc<codemap::CodeMap>,
cstore: Rc<CrateStore>)
-> Session {
let host = match Target::search(config::host_triple()) {
Ok(t) => t,
Err(e) => {
panic!(span_diagnostic.fatal(&format!("Error loading host specification: {}", e)));
}
};
let target_cfg = config::build_target_config(&sopts, &span_diagnostic);
let p_s = parse::ParseSess::with_span_handler(span_diagnostic, codemap);
let default_sysroot = match sopts.maybe_sysroot {
Some(_) => None,
None => Some(filesearch::get_or_default_sysroot())
};
let local_crate_source_file = local_crate_source_file.map(|path|
if path.is_absolute() {
path.clone()
} else {
env::current_dir().unwrap().join(&path)
}
);
let sess = Session {
dep_graph: dep_graph.clone(),
target: target_cfg,
host: host,
opts: sopts,
cstore: cstore,
parse_sess: p_s,
entry_fn: RefCell::new(None),
entry_type: Cell::new(None),
plugin_registrar_fn: Cell::new(None),
derive_registrar_fn: Cell::new(None),
default_sysroot: default_sysroot,
local_crate_source_file: local_crate_source_file,
working_dir: env::current_dir().unwrap(),
lint_store: RefCell::new(lint::LintStore::new()),
lints: RefCell::new(lint::LintTable::new()),
one_time_diagnostics: RefCell::new(FxHashSet()),
plugin_llvm_passes: RefCell::new(Vec::new()),
mir_passes: RefCell::new(mir_pass::Passes::new()),
plugin_attributes: RefCell::new(Vec::new()),
crate_types: RefCell::new(Vec::new()),
dependency_formats: RefCell::new(FxHashMap()),
crate_disambiguator: RefCell::new(Symbol::intern("")),
features: RefCell::new(feature_gate::Features::new()),
recursion_limit: Cell::new(64),
type_length_limit: Cell::new(1048576),
next_node_id: Cell::new(NodeId::new(1)),
injected_allocator: Cell::new(None),
injected_panic_runtime: Cell::new(None),
imported_macro_spans: RefCell::new(HashMap::new()),
incr_comp_session: RefCell::new(IncrCompSession::NotInitialized),
perf_stats: PerfStats {
svh_time: Cell::new(Duration::from_secs(0)),
incr_comp_hashes_time: Cell::new(Duration::from_secs(0)),
incr_comp_hashes_count: Cell::new(0),
incr_comp_bytes_hashed: Cell::new(0),
symbol_hash_time: Cell::new(Duration::from_secs(0)),
decode_def_path_tables_time: Cell::new(Duration::from_secs(0)),
},
code_stats: RefCell::new(CodeStats::new()),
};
init_llvm(&sess);
sess
}
#[derive(Debug)]
pub enum IncrCompSession {
NotInitialized,
Active {
session_directory: PathBuf,
lock_file: flock::Lock,
},
Finalized {
session_directory: PathBuf,
},
InvalidBecauseOfErrors {
session_directory: PathBuf,
}
}
fn init_llvm(sess: &Session) {
unsafe {
use std::sync::Once;
static INIT: Once = Once::new();
static mut POISONED: bool = false;
INIT.call_once(|| {
if llvm::LLVMStartMultithreaded() != 1 {
POISONED = true;
}
configure_llvm(sess);
});
if POISONED {
bug!("couldn't enable multi-threaded LLVM");
}
}
}
unsafe fn configure_llvm(sess: &Session) {
let mut llvm_c_strs = Vec::new();
let mut llvm_args = Vec::new();
{
let mut add = |arg: &str| {
let s = CString::new(arg).unwrap();
llvm_args.push(s.as_ptr());
llvm_c_strs.push(s);
};
add("rustc");
if sess.time_llvm_passes() { add("-time-passes"); }
if sess.print_llvm_passes() { add("-debug-pass=Structure"); }
for arg in &sess.opts.cg.llvm_args {
add(&(*arg));
}
}
llvm::LLVMInitializePasses();
llvm::initialize_available_targets();
llvm::LLVMRustSetLLVMOptions(llvm_args.len() as c_int,
llvm_args.as_ptr());
}
pub fn early_error(output: config::ErrorOutputType, msg: &str) -> ! {
let emitter: Box<Emitter> = match output {
config::ErrorOutputType::HumanReadable(color_config) => {
Box::new(EmitterWriter::stderr(color_config,
None))
}
config::ErrorOutputType::Json => Box::new(JsonEmitter::basic()),
};
let handler = errors::Handler::with_emitter(true, false, emitter);
handler.emit(&MultiSpan::new(), msg, errors::Level::Fatal);
panic!(errors::FatalError);
}
pub fn early_warn(output: config::ErrorOutputType, msg: &str) {
let emitter: Box<Emitter> = match output {
config::ErrorOutputType::HumanReadable(color_config) => {
Box::new(EmitterWriter::stderr(color_config,
None))
}
config::ErrorOutputType::Json => Box::new(JsonEmitter::basic()),
};
let handler = errors::Handler::with_emitter(true, false, emitter);
handler.emit(&MultiSpan::new(), msg, errors::Level::Warning);
}
pub type CompileResult = Result<(), usize>;
pub fn compile_result_from_err_count(err_count: usize) -> CompileResult {
if err_count == 0 {
Ok(())
} else {
Err(err_count)
}
}
#[cold]
#[inline(never)]
pub fn bug_fmt(file: &'static str, line: u32, args: fmt::Arguments) -> ! {
opt_span_bug_fmt(file, line, None::<Span>, args);
}
#[cold]
#[inline(never)]
pub fn span_bug_fmt<S: Into<MultiSpan>>(file: &'static str,
line: u32,
span: S,
args: fmt::Arguments) -> ! {
opt_span_bug_fmt(file, line, Some(span), args);
}
fn opt_span_bug_fmt<S: Into<MultiSpan>>(file: &'static str,
line: u32,
span: Option<S>,
args: fmt::Arguments) -> ! {
tls::with_opt(move |tcx| {
let msg = format!("{}:{}: {}", file, line, args);
match (tcx, span) {
(Some(tcx), Some(span)) => tcx.sess.diagnostic().span_bug(span, &msg),
(Some(tcx), None) => tcx.sess.diagnostic().bug(&msg),
(None, _) => panic!(msg)
}
});
unreachable!();
}