1001 lines
40 KiB
Rust
1001 lines
40 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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pub use self::code_stats::{CodeStats, DataTypeKind, FieldInfo};
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pub use self::code_stats::{SizeKind, TypeSizeInfo, VariantInfo};
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use hir::def_id::{CrateNum, DefIndex};
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use ich::Fingerprint;
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use lint;
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use middle::allocator::AllocatorKind;
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use middle::dependency_format;
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use session::search_paths::PathKind;
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use session::config::DebugInfoLevel;
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use ty::tls;
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use util::nodemap::{FxHashMap, FxHashSet};
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use util::common::{duration_to_secs_str, ErrorReported};
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use syntax::ast::NodeId;
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use errors::{self, DiagnosticBuilder, DiagnosticId};
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use errors::emitter::{Emitter, EmitterWriter};
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use syntax::json::JsonEmitter;
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use syntax::feature_gate;
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use syntax::parse;
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use syntax::parse::ParseSess;
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use syntax::{ast, codemap};
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use syntax::feature_gate::AttributeType;
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use syntax_pos::{Span, MultiSpan};
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use rustc_back::{LinkerFlavor, PanicStrategy};
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use rustc_back::target::Target;
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use rustc_data_structures::flock;
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use jobserver::Client;
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use std::cell::{self, Cell, RefCell};
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use std::collections::HashMap;
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use std::env;
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use std::fmt;
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use std::io::Write;
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use std::path::{Path, PathBuf};
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use std::rc::Rc;
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use std::sync::{Once, ONCE_INIT};
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use std::time::Duration;
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mod code_stats;
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pub mod config;
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pub mod filesearch;
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pub mod search_paths;
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/// Represents the data associated with a compilation
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/// session for a single crate.
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pub struct Session {
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pub target: config::Config,
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pub host: Target,
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pub opts: config::Options,
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pub parse_sess: ParseSess,
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/// For a library crate, this is always none
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pub entry_fn: RefCell<Option<(NodeId, Span)>>,
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pub entry_type: Cell<Option<config::EntryFnType>>,
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pub plugin_registrar_fn: Cell<Option<ast::NodeId>>,
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pub derive_registrar_fn: Cell<Option<ast::NodeId>>,
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pub default_sysroot: Option<PathBuf>,
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/// The name of the root source file of the crate, in the local file system.
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/// `None` means that there is no source file.
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pub local_crate_source_file: Option<String>,
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/// The directory the compiler has been executed in plus a flag indicating
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/// if the value stored here has been affected by path remapping.
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pub working_dir: (String, bool),
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pub lint_store: RefCell<lint::LintStore>,
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pub buffered_lints: RefCell<Option<lint::LintBuffer>>,
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/// Set of (DiagnosticId, Option<Span>, message) tuples tracking
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/// (sub)diagnostics that have been set once, but should not be set again,
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/// in order to avoid redundantly verbose output (Issue #24690, #44953).
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pub one_time_diagnostics: RefCell<FxHashSet<(DiagnosticMessageId, Option<Span>, String)>>,
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pub plugin_llvm_passes: RefCell<Vec<String>>,
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pub plugin_attributes: RefCell<Vec<(String, AttributeType)>>,
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pub crate_types: RefCell<Vec<config::CrateType>>,
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pub dependency_formats: RefCell<dependency_format::Dependencies>,
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/// The crate_disambiguator is constructed out of all the `-C metadata`
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/// arguments passed to the compiler. Its value together with the crate-name
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/// forms a unique global identifier for the crate. It is used to allow
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/// multiple crates with the same name to coexist. See the
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/// trans::back::symbol_names module for more information.
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pub crate_disambiguator: RefCell<Option<CrateDisambiguator>>,
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pub features: RefCell<feature_gate::Features>,
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/// The maximum recursion limit for potentially infinitely recursive
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/// operations such as auto-dereference and monomorphization.
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pub recursion_limit: Cell<usize>,
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/// The maximum length of types during monomorphization.
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pub type_length_limit: Cell<usize>,
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/// The metadata::creader module may inject an allocator/panic_runtime
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/// dependency if it didn't already find one, and this tracks what was
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/// injected.
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pub injected_allocator: Cell<Option<CrateNum>>,
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pub allocator_kind: Cell<Option<AllocatorKind>>,
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pub injected_panic_runtime: Cell<Option<CrateNum>>,
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/// Map from imported macro spans (which consist of
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/// the localized span for the macro body) to the
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/// macro name and definition span in the source crate.
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pub imported_macro_spans: RefCell<HashMap<Span, (String, Span)>>,
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incr_comp_session: RefCell<IncrCompSession>,
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/// Some measurements that are being gathered during compilation.
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pub perf_stats: PerfStats,
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/// Data about code being compiled, gathered during compilation.
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pub code_stats: RefCell<CodeStats>,
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next_node_id: Cell<ast::NodeId>,
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/// If -zfuel=crate=n is specified, Some(crate).
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optimization_fuel_crate: Option<String>,
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/// If -zfuel=crate=n is specified, initially set to n. Otherwise 0.
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optimization_fuel_limit: Cell<u64>,
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/// We're rejecting all further optimizations.
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out_of_fuel: Cell<bool>,
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// The next two are public because the driver needs to read them.
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/// If -zprint-fuel=crate, Some(crate).
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pub print_fuel_crate: Option<String>,
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/// Always set to zero and incremented so that we can print fuel expended by a crate.
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pub print_fuel: Cell<u64>,
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/// Loaded up early on in the initialization of this `Session` to avoid
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/// false positives about a job server in our environment.
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pub jobserver_from_env: Option<Client>,
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/// Metadata about the allocators for the current crate being compiled
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pub has_global_allocator: Cell<bool>,
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}
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pub struct PerfStats {
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/// The accumulated time needed for computing the SVH of the crate
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pub svh_time: Cell<Duration>,
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/// The accumulated time spent on computing incr. comp. hashes
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pub incr_comp_hashes_time: Cell<Duration>,
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/// The number of incr. comp. hash computations performed
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pub incr_comp_hashes_count: Cell<u64>,
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/// The number of bytes hashed when computing ICH values
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pub incr_comp_bytes_hashed: Cell<u64>,
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/// The accumulated time spent on computing symbol hashes
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pub symbol_hash_time: Cell<Duration>,
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/// The accumulated time spent decoding def path tables from metadata
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pub decode_def_path_tables_time: Cell<Duration>,
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}
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/// Enum to support dispatch of one-time diagnostics (in Session.diag_once)
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enum DiagnosticBuilderMethod {
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Note,
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SpanNote,
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// add more variants as needed to support one-time diagnostics
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}
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/// Diagnostic message ID—used by `Session.one_time_diagnostics` to avoid
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/// emitting the same message more than once
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#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
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pub enum DiagnosticMessageId {
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ErrorId(u16), // EXXXX error code as integer
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LintId(lint::LintId),
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StabilityId(u32) // issue number
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}
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impl Session {
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pub fn local_crate_disambiguator(&self) -> CrateDisambiguator {
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match *self.crate_disambiguator.borrow() {
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Some(value) => value,
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None => bug!("accessing disambiguator before initialization"),
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}
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}
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pub fn struct_span_warn<'a, S: Into<MultiSpan>>(&'a self,
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sp: S,
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msg: &str)
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-> DiagnosticBuilder<'a> {
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self.diagnostic().struct_span_warn(sp, msg)
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}
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pub fn struct_span_warn_with_code<'a, S: Into<MultiSpan>>(&'a self,
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sp: S,
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msg: &str,
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code: DiagnosticId)
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-> DiagnosticBuilder<'a> {
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self.diagnostic().struct_span_warn_with_code(sp, msg, code)
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}
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pub fn struct_warn<'a>(&'a self, msg: &str) -> DiagnosticBuilder<'a> {
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self.diagnostic().struct_warn(msg)
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}
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pub fn struct_span_err<'a, S: Into<MultiSpan>>(&'a self,
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sp: S,
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msg: &str)
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-> DiagnosticBuilder<'a> {
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self.diagnostic().struct_span_err(sp, msg)
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}
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pub fn struct_span_err_with_code<'a, S: Into<MultiSpan>>(&'a self,
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sp: S,
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msg: &str,
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code: DiagnosticId)
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-> DiagnosticBuilder<'a> {
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self.diagnostic().struct_span_err_with_code(sp, msg, code)
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}
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// FIXME: This method should be removed (every error should have an associated error code).
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pub fn struct_err<'a>(&'a self, msg: &str) -> DiagnosticBuilder<'a> {
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self.diagnostic().struct_err(msg)
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}
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pub fn struct_err_with_code<'a>(
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&'a self,
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msg: &str,
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code: DiagnosticId,
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) -> DiagnosticBuilder<'a> {
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self.diagnostic().struct_err_with_code(msg, code)
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}
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pub fn struct_span_fatal<'a, S: Into<MultiSpan>>(&'a self,
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sp: S,
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msg: &str)
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-> DiagnosticBuilder<'a> {
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self.diagnostic().struct_span_fatal(sp, msg)
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}
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pub fn struct_span_fatal_with_code<'a, S: Into<MultiSpan>>(&'a self,
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sp: S,
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msg: &str,
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code: DiagnosticId)
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-> DiagnosticBuilder<'a> {
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self.diagnostic().struct_span_fatal_with_code(sp, msg, code)
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}
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pub fn struct_fatal<'a>(&'a self, msg: &str) -> DiagnosticBuilder<'a> {
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self.diagnostic().struct_fatal(msg)
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}
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pub fn span_fatal<S: Into<MultiSpan>>(&self, sp: S, msg: &str) -> ! {
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panic!(self.diagnostic().span_fatal(sp, msg))
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}
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pub fn span_fatal_with_code<S: Into<MultiSpan>>(
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&self,
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sp: S,
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msg: &str,
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code: DiagnosticId,
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) -> ! {
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panic!(self.diagnostic().span_fatal_with_code(sp, msg, code))
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}
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pub fn fatal(&self, msg: &str) -> ! {
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panic!(self.diagnostic().fatal(msg))
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}
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pub fn span_err_or_warn<S: Into<MultiSpan>>(&self, is_warning: bool, sp: S, msg: &str) {
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if is_warning {
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self.span_warn(sp, msg);
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} else {
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self.span_err(sp, msg);
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}
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}
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pub fn span_err<S: Into<MultiSpan>>(&self, sp: S, msg: &str) {
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self.diagnostic().span_err(sp, msg)
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}
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pub fn span_err_with_code<S: Into<MultiSpan>>(&self, sp: S, msg: &str, code: DiagnosticId) {
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self.diagnostic().span_err_with_code(sp, &msg, code)
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}
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pub fn err(&self, msg: &str) {
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self.diagnostic().err(msg)
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}
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pub fn err_count(&self) -> usize {
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self.diagnostic().err_count()
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}
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pub fn has_errors(&self) -> bool {
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self.diagnostic().has_errors()
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}
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pub fn abort_if_errors(&self) {
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self.diagnostic().abort_if_errors();
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}
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pub fn compile_status(&self) -> Result<(), CompileIncomplete> {
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compile_result_from_err_count(self.err_count())
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}
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pub fn track_errors<F, T>(&self, f: F) -> Result<T, ErrorReported>
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where F: FnOnce() -> T
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{
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let old_count = self.err_count();
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let result = f();
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let errors = self.err_count() - old_count;
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if errors == 0 {
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Ok(result)
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} else {
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Err(ErrorReported)
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}
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}
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pub fn span_warn<S: Into<MultiSpan>>(&self, sp: S, msg: &str) {
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self.diagnostic().span_warn(sp, msg)
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}
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pub fn span_warn_with_code<S: Into<MultiSpan>>(&self, sp: S, msg: &str, code: DiagnosticId) {
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self.diagnostic().span_warn_with_code(sp, msg, code)
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}
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pub fn warn(&self, msg: &str) {
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self.diagnostic().warn(msg)
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}
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pub fn opt_span_warn<S: Into<MultiSpan>>(&self, opt_sp: Option<S>, msg: &str) {
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match opt_sp {
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Some(sp) => self.span_warn(sp, msg),
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None => self.warn(msg),
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}
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}
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/// Delay a span_bug() call until abort_if_errors()
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pub fn delay_span_bug<S: Into<MultiSpan>>(&self, sp: S, msg: &str) {
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self.diagnostic().delay_span_bug(sp, msg)
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}
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pub fn note_without_error(&self, msg: &str) {
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self.diagnostic().note_without_error(msg)
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}
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pub fn span_note_without_error<S: Into<MultiSpan>>(&self, sp: S, msg: &str) {
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self.diagnostic().span_note_without_error(sp, msg)
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}
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pub fn span_unimpl<S: Into<MultiSpan>>(&self, sp: S, msg: &str) -> ! {
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self.diagnostic().span_unimpl(sp, msg)
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}
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pub fn unimpl(&self, msg: &str) -> ! {
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self.diagnostic().unimpl(msg)
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}
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pub fn buffer_lint<S: Into<MultiSpan>>(&self,
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lint: &'static lint::Lint,
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id: ast::NodeId,
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sp: S,
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msg: &str) {
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match *self.buffered_lints.borrow_mut() {
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Some(ref mut buffer) => buffer.add_lint(lint, id, sp.into(), msg),
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None => bug!("can't buffer lints after HIR lowering"),
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}
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}
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pub fn reserve_node_ids(&self, count: usize) -> ast::NodeId {
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let id = self.next_node_id.get();
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match id.as_usize().checked_add(count) {
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Some(next) => {
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self.next_node_id.set(ast::NodeId::new(next));
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}
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None => bug!("Input too large, ran out of node ids!")
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}
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id
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}
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pub fn next_node_id(&self) -> NodeId {
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self.reserve_node_ids(1)
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}
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pub fn diagnostic<'a>(&'a self) -> &'a errors::Handler {
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&self.parse_sess.span_diagnostic
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}
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/// Analogous to calling methods on the given `DiagnosticBuilder`, but
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/// deduplicates on lint ID, span (if any), and message for this `Session`
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/// if we're not outputting in JSON mode.
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fn diag_once<'a, 'b>(&'a self,
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diag_builder: &'b mut DiagnosticBuilder<'a>,
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method: DiagnosticBuilderMethod,
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lint: &'static lint::Lint, message: &str, span: Option<Span>) {
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let mut do_method = || {
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match method {
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DiagnosticBuilderMethod::Note => {
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diag_builder.note(message);
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},
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DiagnosticBuilderMethod::SpanNote => {
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diag_builder.span_note(span.expect("span_note expects a span"), message);
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}
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}
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};
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match self.opts.error_format {
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// when outputting JSON for tool consumption, the tool might want
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// the duplicates
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config::ErrorOutputType::Json(_) => {
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do_method()
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},
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_ => {
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let lint_id = DiagnosticMessageId::LintId(lint::LintId::of(lint));
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let id_span_message = (lint_id, span, message.to_owned());
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let fresh = self.one_time_diagnostics.borrow_mut().insert(id_span_message);
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if fresh {
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do_method()
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}
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}
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}
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}
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pub fn diag_span_note_once<'a, 'b>(&'a self,
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diag_builder: &'b mut DiagnosticBuilder<'a>,
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lint: &'static lint::Lint, span: Span, message: &str) {
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self.diag_once(diag_builder, DiagnosticBuilderMethod::SpanNote, lint, message, Some(span));
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}
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pub fn diag_note_once<'a, 'b>(&'a self,
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diag_builder: &'b mut DiagnosticBuilder<'a>,
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lint: &'static lint::Lint, message: &str) {
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self.diag_once(diag_builder, DiagnosticBuilderMethod::Note, lint, message, None);
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}
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pub fn codemap<'a>(&'a self) -> &'a codemap::CodeMap {
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self.parse_sess.codemap()
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}
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pub fn verbose(&self) -> bool { self.opts.debugging_opts.verbose }
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pub fn time_passes(&self) -> bool { self.opts.debugging_opts.time_passes }
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pub fn profile_queries(&self) -> bool {
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self.opts.debugging_opts.profile_queries ||
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self.opts.debugging_opts.profile_queries_and_keys
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}
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pub fn profile_queries_and_keys(&self) -> bool {
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self.opts.debugging_opts.profile_queries_and_keys
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}
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pub fn count_llvm_insns(&self) -> bool {
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self.opts.debugging_opts.count_llvm_insns
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}
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pub fn time_llvm_passes(&self) -> bool {
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self.opts.debugging_opts.time_llvm_passes
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}
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pub fn trans_stats(&self) -> bool { self.opts.debugging_opts.trans_stats }
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pub fn meta_stats(&self) -> bool { self.opts.debugging_opts.meta_stats }
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pub fn asm_comments(&self) -> bool { self.opts.debugging_opts.asm_comments }
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pub fn no_verify(&self) -> bool { self.opts.debugging_opts.no_verify }
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pub fn borrowck_stats(&self) -> bool { self.opts.debugging_opts.borrowck_stats }
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pub fn print_llvm_passes(&self) -> bool {
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self.opts.debugging_opts.print_llvm_passes
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}
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pub fn emit_end_regions(&self) -> bool {
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self.opts.debugging_opts.emit_end_regions ||
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(self.opts.debugging_opts.mir_emit_validate > 0) ||
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self.opts.debugging_opts.borrowck_mir
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}
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pub fn lto(&self) -> bool {
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self.opts.cg.lto
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}
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/// Returns the panic strategy for this compile session. If the user explicitly selected one
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/// using '-C panic', use that, otherwise use the panic strategy defined by the target.
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pub fn panic_strategy(&self) -> PanicStrategy {
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self.opts.cg.panic.unwrap_or(self.target.target.options.panic_strategy)
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}
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pub fn linker_flavor(&self) -> LinkerFlavor {
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self.opts.debugging_opts.linker_flavor.unwrap_or(self.target.target.linker_flavor)
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}
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pub fn no_landing_pads(&self) -> bool {
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self.opts.debugging_opts.no_landing_pads || self.panic_strategy() == PanicStrategy::Abort
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}
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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 crt_static(&self) -> bool {
|
|
// If the target does not opt in to crt-static support, use its default.
|
|
if self.target.target.options.crt_static_respected {
|
|
self.crt_static_feature()
|
|
} else {
|
|
self.target.target.options.crt_static_default
|
|
}
|
|
}
|
|
|
|
pub fn crt_static_feature(&self) -> bool {
|
|
let requested_features = self.opts.cg.target_feature.split(',');
|
|
let found_negative = requested_features.clone().any(|r| r == "-crt-static");
|
|
let found_positive = requested_features.clone().any(|r| r == "+crt-static");
|
|
|
|
// If the target we're compiling for requests a static crt by default,
|
|
// then see if the `-crt-static` feature was passed to disable that.
|
|
// Otherwise if we don't have a static crt by default then see if the
|
|
// `+crt-static` feature was passed.
|
|
if self.target.target.options.crt_static_default {
|
|
!found_negative
|
|
} else {
|
|
found_positive
|
|
}
|
|
}
|
|
|
|
pub fn must_not_eliminate_frame_pointers(&self) -> bool {
|
|
self.opts.debuginfo != DebugInfoLevel::NoDebugInfo ||
|
|
!self.target.target.options.eliminate_frame_pointer
|
|
}
|
|
|
|
/// Returns the symbol name for the registrar function,
|
|
/// given the crate Svh and the function DefIndex.
|
|
pub fn generate_plugin_registrar_symbol(&self, disambiguator: CrateDisambiguator,
|
|
index: DefIndex)
|
|
-> String {
|
|
format!("__rustc_plugin_registrar__{}_{}", disambiguator.to_fingerprint().to_hex(),
|
|
index.as_usize())
|
|
}
|
|
|
|
pub fn generate_derive_registrar_symbol(&self, disambiguator: CrateDisambiguator,
|
|
index: DefIndex)
|
|
-> String {
|
|
format!("__rustc_derive_registrar__{}_{}", disambiguator.to_fingerprint().to_hex(),
|
|
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 set_incr_session_load_dep_graph(&self, load: bool) {
|
|
let mut incr_comp_session = self.incr_comp_session.borrow_mut();
|
|
|
|
match *incr_comp_session {
|
|
IncrCompSession::Active { ref mut load_dep_graph, .. } => {
|
|
*load_dep_graph = load;
|
|
}
|
|
_ => {}
|
|
}
|
|
}
|
|
|
|
pub fn incr_session_load_dep_graph(&self) -> bool {
|
|
let incr_comp_session = self.incr_comp_session.borrow();
|
|
match *incr_comp_session {
|
|
IncrCompSession::Active { load_dep_graph, .. } => load_dep_graph,
|
|
_ => false,
|
|
}
|
|
}
|
|
|
|
pub fn init_incr_comp_session(&self,
|
|
session_dir: PathBuf,
|
|
lock_file: flock::Lock,
|
|
load_dep_graph: bool) {
|
|
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,
|
|
load_dep_graph,
|
|
};
|
|
}
|
|
|
|
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)
|
|
}
|
|
|
|
// Note: This will also drop the lock file, thus unlocking the directory
|
|
*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),
|
|
};
|
|
|
|
// Note: This will also drop the lock file, thus unlocking the directory
|
|
*incr_comp_session = IncrCompSession::InvalidBecauseOfErrors {
|
|
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()));
|
|
}
|
|
|
|
/// We want to know if we're allowed to do an optimization for crate foo from -z fuel=foo=n.
|
|
/// This expends fuel if applicable, and records fuel if applicable.
|
|
pub fn consider_optimizing<T: Fn() -> String>(&self, crate_name: &str, msg: T) -> bool {
|
|
let mut ret = true;
|
|
match self.optimization_fuel_crate {
|
|
Some(ref c) if c == crate_name => {
|
|
let fuel = self.optimization_fuel_limit.get();
|
|
ret = fuel != 0;
|
|
if fuel == 0 && !self.out_of_fuel.get() {
|
|
println!("optimization-fuel-exhausted: {}", msg());
|
|
self.out_of_fuel.set(true);
|
|
} else if fuel > 0 {
|
|
self.optimization_fuel_limit.set(fuel-1);
|
|
}
|
|
}
|
|
_ => {}
|
|
}
|
|
match self.print_fuel_crate {
|
|
Some(ref c) if c == crate_name=> {
|
|
self.print_fuel.set(self.print_fuel.get()+1);
|
|
},
|
|
_ => {}
|
|
}
|
|
ret
|
|
}
|
|
|
|
/// Returns the number of codegen units that should be used for this
|
|
/// compilation
|
|
pub fn codegen_units(&self) -> usize {
|
|
if let Some(n) = self.opts.cli_forced_codegen_units {
|
|
return n
|
|
}
|
|
if let Some(n) = self.target.target.options.default_codegen_units {
|
|
return n as usize
|
|
}
|
|
|
|
match self.opts.optimize {
|
|
// If we're compiling at `-O0` then default to 16 codegen units.
|
|
// The number here shouldn't matter too too much as debug mode
|
|
// builds don't rely on performance at all, meaning that lost
|
|
// opportunities for inlining through multiple codegen units is
|
|
// a non-issue.
|
|
//
|
|
// Note that the high number here doesn't mean that we'll be
|
|
// spawning a large number of threads in parallel. The backend
|
|
// of rustc contains global rate limiting through the
|
|
// `jobserver` crate so we'll never overload the system with too
|
|
// much work, but rather we'll only be optimizing when we're
|
|
// otherwise cooperating with other instances of rustc.
|
|
//
|
|
// Rather the high number here means that we should be able to
|
|
// keep a lot of idle cpus busy. By ensuring that no codegen
|
|
// unit takes *too* long to build we'll be guaranteed that all
|
|
// cpus will finish pretty closely to one another and we should
|
|
// make relatively optimal use of system resources
|
|
config::OptLevel::No => 16,
|
|
|
|
// All other optimization levels default use one codegen unit,
|
|
// the historical default in Rust for a Long Time.
|
|
_ => 1,
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn build_session(sopts: config::Options,
|
|
local_crate_source_file: Option<PathBuf>,
|
|
registry: errors::registry::Registry)
|
|
-> Session {
|
|
let file_path_mapping = sopts.file_path_mapping();
|
|
|
|
build_session_with_codemap(sopts,
|
|
local_crate_source_file,
|
|
registry,
|
|
Rc::new(codemap::CodeMap::new(file_path_mapping)),
|
|
None)
|
|
}
|
|
|
|
pub fn build_session_with_codemap(sopts: config::Options,
|
|
local_crate_source_file: Option<PathBuf>,
|
|
registry: errors::registry::Registry,
|
|
codemap: Rc<codemap::CodeMap>,
|
|
emitter_dest: Option<Box<Write + Send>>)
|
|
-> Session {
|
|
// FIXME: This is not general enough to make the warning lint completely override
|
|
// normal diagnostic warnings, since the warning lint can also be denied and changed
|
|
// later via the source code.
|
|
let warnings_allow = sopts.lint_opts
|
|
.iter()
|
|
.filter(|&&(ref key, _)| *key == "warnings")
|
|
.map(|&(_, ref level)| *level == lint::Allow)
|
|
.last()
|
|
.unwrap_or(false);
|
|
let cap_lints_allow = sopts.lint_cap.map_or(false, |cap| cap == lint::Allow);
|
|
|
|
let can_print_warnings = !(warnings_allow || cap_lints_allow);
|
|
|
|
let treat_err_as_bug = sopts.debugging_opts.treat_err_as_bug;
|
|
|
|
let macro_backtrace = sopts.debugging_opts.macro_backtrace;
|
|
|
|
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()), false))
|
|
}
|
|
(config::ErrorOutputType::HumanReadable(_), Some(dst)) => {
|
|
Box::new(EmitterWriter::new(dst, Some(codemap.clone()), false))
|
|
}
|
|
(config::ErrorOutputType::Json(pretty), None) => {
|
|
Box::new(JsonEmitter::stderr(Some(registry), codemap.clone(), pretty))
|
|
}
|
|
(config::ErrorOutputType::Json(pretty), Some(dst)) => {
|
|
Box::new(JsonEmitter::new(dst, Some(registry), codemap.clone(), pretty))
|
|
}
|
|
(config::ErrorOutputType::Short(color_config), None) => {
|
|
Box::new(EmitterWriter::stderr(color_config, Some(codemap.clone()), true))
|
|
}
|
|
(config::ErrorOutputType::Short(_), Some(dst)) => {
|
|
Box::new(EmitterWriter::new(dst, Some(codemap.clone()), true))
|
|
}
|
|
};
|
|
|
|
let diagnostic_handler =
|
|
errors::Handler::with_emitter(can_print_warnings,
|
|
treat_err_as_bug,
|
|
macro_backtrace,
|
|
emitter);
|
|
|
|
build_session_(sopts,
|
|
local_crate_source_file,
|
|
diagnostic_handler,
|
|
codemap)
|
|
}
|
|
|
|
pub fn build_session_(sopts: config::Options,
|
|
local_crate_source_file: Option<PathBuf>,
|
|
span_diagnostic: errors::Handler,
|
|
codemap: Rc<codemap::CodeMap>)
|
|
-> 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 file_path_mapping = sopts.file_path_mapping();
|
|
|
|
let local_crate_source_file = local_crate_source_file.map(|path| {
|
|
file_path_mapping.map_prefix(path.to_string_lossy().into_owned()).0
|
|
});
|
|
|
|
let optimization_fuel_crate = sopts.debugging_opts.fuel.as_ref().map(|i| i.0.clone());
|
|
let optimization_fuel_limit = Cell::new(sopts.debugging_opts.fuel.as_ref()
|
|
.map(|i| i.1).unwrap_or(0));
|
|
let print_fuel_crate = sopts.debugging_opts.print_fuel.clone();
|
|
let print_fuel = Cell::new(0);
|
|
|
|
let working_dir = match env::current_dir() {
|
|
Ok(dir) => dir.to_string_lossy().into_owned(),
|
|
Err(e) => {
|
|
panic!(p_s.span_diagnostic.fatal(&format!("Current directory is invalid: {}", e)))
|
|
}
|
|
};
|
|
let working_dir = file_path_mapping.map_prefix(working_dir);
|
|
|
|
let sess = Session {
|
|
target: target_cfg,
|
|
host,
|
|
opts: sopts,
|
|
parse_sess: p_s,
|
|
// For a library crate, this is always none
|
|
entry_fn: RefCell::new(None),
|
|
entry_type: Cell::new(None),
|
|
plugin_registrar_fn: Cell::new(None),
|
|
derive_registrar_fn: Cell::new(None),
|
|
default_sysroot,
|
|
local_crate_source_file,
|
|
working_dir,
|
|
lint_store: RefCell::new(lint::LintStore::new()),
|
|
buffered_lints: RefCell::new(Some(lint::LintBuffer::new())),
|
|
one_time_diagnostics: RefCell::new(FxHashSet()),
|
|
plugin_llvm_passes: RefCell::new(Vec::new()),
|
|
plugin_attributes: RefCell::new(Vec::new()),
|
|
crate_types: RefCell::new(Vec::new()),
|
|
dependency_formats: RefCell::new(FxHashMap()),
|
|
crate_disambiguator: RefCell::new(None),
|
|
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),
|
|
allocator_kind: 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()),
|
|
optimization_fuel_crate,
|
|
optimization_fuel_limit,
|
|
print_fuel_crate,
|
|
print_fuel,
|
|
out_of_fuel: Cell::new(false),
|
|
// Note that this is unsafe because it may misinterpret file descriptors
|
|
// on Unix as jobserver file descriptors. We hopefully execute this near
|
|
// the beginning of the process though to ensure we don't get false
|
|
// positives, or in other words we try to execute this before we open
|
|
// any file descriptors ourselves.
|
|
//
|
|
// Also note that we stick this in a global because there could be
|
|
// multiple `Session` instances in this process, and the jobserver is
|
|
// per-process.
|
|
jobserver_from_env: unsafe {
|
|
static mut GLOBAL_JOBSERVER: *mut Option<Client> = 0 as *mut _;
|
|
static INIT: Once = ONCE_INIT;
|
|
INIT.call_once(|| {
|
|
GLOBAL_JOBSERVER = Box::into_raw(Box::new(Client::from_env()));
|
|
});
|
|
(*GLOBAL_JOBSERVER).clone()
|
|
},
|
|
has_global_allocator: Cell::new(false),
|
|
};
|
|
|
|
sess
|
|
}
|
|
|
|
/// Hash value constructed out of all the `-C metadata` arguments passed to the
|
|
/// compiler. Together with the crate-name forms a unique global identifier for
|
|
/// the crate.
|
|
#[derive(Eq, PartialEq, Ord, PartialOrd, Hash, Debug, Clone, Copy, RustcEncodable, RustcDecodable)]
|
|
pub struct CrateDisambiguator(Fingerprint);
|
|
|
|
impl CrateDisambiguator {
|
|
pub fn to_fingerprint(self) -> Fingerprint {
|
|
self.0
|
|
}
|
|
}
|
|
|
|
impl From<Fingerprint> for CrateDisambiguator {
|
|
fn from(fingerprint: Fingerprint) -> CrateDisambiguator {
|
|
CrateDisambiguator(fingerprint)
|
|
}
|
|
}
|
|
|
|
impl_stable_hash_for!(tuple_struct CrateDisambiguator { fingerprint });
|
|
|
|
/// Holds data on the current incremental compilation session, if there is one.
|
|
#[derive(Debug)]
|
|
pub enum IncrCompSession {
|
|
/// This is the state the session will be in until the incr. comp. dir is
|
|
/// needed.
|
|
NotInitialized,
|
|
/// This is the state during which the session directory is private and can
|
|
/// be modified.
|
|
Active {
|
|
session_directory: PathBuf,
|
|
lock_file: flock::Lock,
|
|
load_dep_graph: bool,
|
|
},
|
|
/// This is the state after the session directory has been finalized. In this
|
|
/// state, the contents of the directory must not be modified any more.
|
|
Finalized {
|
|
session_directory: PathBuf,
|
|
},
|
|
/// This is an error state that is reached when some compilation error has
|
|
/// occurred. It indicates that the contents of the session directory must
|
|
/// not be used, since they might be invalid.
|
|
InvalidBecauseOfErrors {
|
|
session_directory: PathBuf,
|
|
}
|
|
}
|
|
|
|
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, false))
|
|
}
|
|
config::ErrorOutputType::Json(pretty) => Box::new(JsonEmitter::basic(pretty)),
|
|
config::ErrorOutputType::Short(color_config) => {
|
|
Box::new(EmitterWriter::stderr(color_config, None, true))
|
|
}
|
|
};
|
|
let handler = errors::Handler::with_emitter(true, false, 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, false))
|
|
}
|
|
config::ErrorOutputType::Json(pretty) => Box::new(JsonEmitter::basic(pretty)),
|
|
config::ErrorOutputType::Short(color_config) => {
|
|
Box::new(EmitterWriter::stderr(color_config, None, true))
|
|
}
|
|
};
|
|
let handler = errors::Handler::with_emitter(true, false, false, emitter);
|
|
handler.emit(&MultiSpan::new(), msg, errors::Level::Warning);
|
|
}
|
|
|
|
#[derive(Copy, Clone, Debug)]
|
|
pub enum CompileIncomplete {
|
|
Stopped,
|
|
Errored(ErrorReported)
|
|
}
|
|
impl From<ErrorReported> for CompileIncomplete {
|
|
fn from(err: ErrorReported) -> CompileIncomplete {
|
|
CompileIncomplete::Errored(err)
|
|
}
|
|
}
|
|
pub type CompileResult = Result<(), CompileIncomplete>;
|
|
|
|
pub fn compile_result_from_err_count(err_count: usize) -> CompileResult {
|
|
if err_count == 0 {
|
|
Ok(())
|
|
} else {
|
|
Err(CompileIncomplete::Errored(ErrorReported))
|
|
}
|
|
}
|
|
|
|
#[cold]
|
|
#[inline(never)]
|
|
pub fn bug_fmt(file: &'static str, line: u32, args: fmt::Arguments) -> ! {
|
|
// this wrapper mostly exists so I don't have to write a fully
|
|
// qualified path of None::<Span> inside the bug!() macro definition
|
|
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!();
|
|
}
|