846 lines
33 KiB
Rust
846 lines
33 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 dep_graph::DepGraph;
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use hir::def_id::{CrateNum, DefIndex};
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use hir::svh::Svh;
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use lint;
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use middle::cstore::CrateStore;
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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;
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use mir::transform as mir_pass;
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use syntax::ast::NodeId;
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use errors::{self, DiagnosticBuilder};
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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::symbol::Symbol;
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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 llvm;
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use std::path::{Path, PathBuf};
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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::ffi::CString;
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use std::io::Write;
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use std::rc::Rc;
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use std::fmt;
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use std::time::Duration;
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use libc::c_int;
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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 dep_graph: DepGraph,
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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 cstore: Rc<CrateStore>,
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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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// The path is always expected to be absolute. `None` means that there is no
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// source file.
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pub local_crate_source_file: Option<PathBuf>,
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pub working_dir: PathBuf,
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pub lint_store: RefCell<lint::LintStore>,
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pub lints: RefCell<lint::LintTable>,
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/// Set of (LintId, span, message) tuples tracking lint (sub)diagnostics
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/// that have been set once, but should not be set again, in order to avoid
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/// redundantly verbose output (Issue #24690).
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pub one_time_diagnostics: RefCell<FxHashSet<(lint::LintId, Span, String)>>,
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pub plugin_llvm_passes: RefCell<Vec<String>>,
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pub mir_passes: RefCell<mir_pass::Passes>,
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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<Symbol>,
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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 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 defintion 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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}
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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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impl Session {
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pub fn local_crate_disambiguator(&self) -> Symbol {
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*self.crate_disambiguator.borrow()
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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: &str)
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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: &str)
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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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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_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: &str)
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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>>(&self, sp: S, msg: &str, code: &str) -> ! {
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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: &str) {
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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 track_errors<F, T>(&self, f: F) -> Result<T, usize>
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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(errors)
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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: &str) {
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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 add_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: String)
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{
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self.lints.borrow_mut().add_lint(lint, id, sp, msg);
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}
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pub fn add_lint_diagnostic<M>(&self,
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lint: &'static lint::Lint,
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id: ast::NodeId,
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msg: M)
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where M: lint::IntoEarlyLint,
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{
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self.lints.borrow_mut().add_lint_diagnostic(lint, id, msg);
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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 `.span_note` on the given DiagnosticBuilder, but
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/// deduplicates on lint ID, span, and message for this `Session` if we're
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/// not outputting in JSON mode.
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//
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// FIXME: if the need arises for one-time diagnostics other than
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// `span_note`, we almost certainly want to generalize this
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// "check/insert-into the one-time diagnostics map, then set message if
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// it's not already there" code to accomodate all of them
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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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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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diag_builder.span_note(span, &message);
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},
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_ => {
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let lint_id = 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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diag_builder.span_note(span, &message);
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}
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}
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}
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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 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 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 {
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self.opts.debugging_opts.unstable_options
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}
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pub fn nonzeroing_move_hints(&self) -> bool {
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self.opts.debugging_opts.enable_nonzeroing_move_hints
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}
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pub fn overflow_checks(&self) -> bool {
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self.opts.cg.overflow_checks
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.or(self.opts.debugging_opts.force_overflow_checks)
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.unwrap_or(self.opts.debug_assertions)
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}
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pub fn must_not_eliminate_frame_pointers(&self) -> bool {
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self.opts.debuginfo != DebugInfoLevel::NoDebugInfo ||
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!self.target.target.options.eliminate_frame_pointer
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}
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/// Returns the symbol name for the registrar function,
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/// given the crate Svh and the function DefIndex.
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pub fn generate_plugin_registrar_symbol(&self, svh: &Svh, index: DefIndex)
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-> String {
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format!("__rustc_plugin_registrar__{}_{}", svh, index.as_usize())
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}
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pub fn generate_derive_registrar_symbol(&self,
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svh: &Svh,
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index: DefIndex) -> String {
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format!("__rustc_derive_registrar__{}_{}", svh, index.as_usize())
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}
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pub fn sysroot<'a>(&'a self) -> &'a Path {
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match self.opts.maybe_sysroot {
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Some (ref sysroot) => sysroot,
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None => self.default_sysroot.as_ref()
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.expect("missing sysroot and default_sysroot in Session")
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}
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}
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pub fn target_filesearch(&self, kind: PathKind) -> filesearch::FileSearch {
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filesearch::FileSearch::new(self.sysroot(),
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&self.opts.target_triple,
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&self.opts.search_paths,
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kind)
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}
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pub fn host_filesearch(&self, kind: PathKind) -> filesearch::FileSearch {
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filesearch::FileSearch::new(
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self.sysroot(),
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config::host_triple(),
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&self.opts.search_paths,
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kind)
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}
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pub fn init_incr_comp_session(&self,
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session_dir: PathBuf,
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lock_file: flock::Lock) {
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let mut incr_comp_session = self.incr_comp_session.borrow_mut();
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if let IncrCompSession::NotInitialized = *incr_comp_session { } else {
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bug!("Trying to initialize IncrCompSession `{:?}`", *incr_comp_session)
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}
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*incr_comp_session = IncrCompSession::Active {
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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)
|
|
}
|
|
|
|
// 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: 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
|
|
}
|
|
}
|
|
|
|
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 {
|
|
// 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 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())
|
|
};
|
|
|
|
// Make the path absolute, if necessary
|
|
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 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 sess = Session {
|
|
dep_graph: dep_graph.clone(),
|
|
target: target_cfg,
|
|
host: host,
|
|
opts: sopts,
|
|
cstore: cstore,
|
|
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: 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()),
|
|
optimization_fuel_crate: optimization_fuel_crate,
|
|
optimization_fuel_limit: optimization_fuel_limit,
|
|
print_fuel_crate: print_fuel_crate,
|
|
print_fuel: print_fuel,
|
|
out_of_fuel: Cell::new(false),
|
|
};
|
|
|
|
init_llvm(&sess);
|
|
|
|
sess
|
|
}
|
|
|
|
/// 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,
|
|
},
|
|
// 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,
|
|
}
|
|
}
|
|
|
|
fn init_llvm(sess: &Session) {
|
|
unsafe {
|
|
// Before we touch LLVM, make sure that multithreading is enabled.
|
|
use std::sync::Once;
|
|
static INIT: Once = Once::new();
|
|
static mut POISONED: bool = false;
|
|
INIT.call_once(|| {
|
|
if llvm::LLVMStartMultithreaded() != 1 {
|
|
// use an extra bool to make sure that all future usage of LLVM
|
|
// cannot proceed despite the Once not running more than once.
|
|
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"); // fake program name
|
|
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);
|
|
}
|
|
|
|
// Err(0) means compilation was stopped, but no errors were found.
|
|
// This would be better as a dedicated enum, but using try! is so convenient.
|
|
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) -> ! {
|
|
// this wrapper mostly exists so I don't have to write a fully
|
|
// qualified path of None::<Span> inside the bug!() macro defintion
|
|
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!();
|
|
}
|