| use crate::cgu_reuse_tracker::CguReuseTracker; |
| use crate::code_stats::CodeStats; |
| pub use crate::code_stats::{DataTypeKind, FieldInfo, SizeKind, VariantInfo}; |
| use crate::config::{self, CrateType, InstrumentCoverage, OptLevel, OutputType, SwitchWithOptPath}; |
| use crate::errors::{ |
| CannotEnableCrtStaticLinux, CannotMixAndMatchSanitizers, LinkerPluginToWindowsNotSupported, |
| NotCircumventFeature, ProfileSampleUseFileDoesNotExist, ProfileUseFileDoesNotExist, |
| SanitizerCfiEnabled, SanitizerNotSupported, SanitizersNotSupported, SkippingConstChecks, |
| SplitDebugInfoUnstablePlatform, StackProtectorNotSupportedForTarget, |
| TargetRequiresUnwindTables, UnleashedFeatureHelp, UnstableVirtualFunctionElimination, |
| UnsupportedDwarfVersion, |
| }; |
| use crate::parse::{add_feature_diagnostics, ParseSess}; |
| use crate::search_paths::{PathKind, SearchPath}; |
| use crate::{filesearch, lint}; |
| |
| pub use rustc_ast::attr::MarkedAttrs; |
| pub use rustc_ast::Attribute; |
| use rustc_data_structures::flock; |
| use rustc_data_structures::fx::{FxHashMap, FxHashSet}; |
| use rustc_data_structures::jobserver::{self, Client}; |
| use rustc_data_structures::profiling::{duration_to_secs_str, SelfProfiler, SelfProfilerRef}; |
| use rustc_data_structures::sync::{ |
| self, AtomicU64, AtomicUsize, Lock, Lrc, OnceCell, OneThread, Ordering, Ordering::SeqCst, |
| }; |
| use rustc_errors::annotate_snippet_emitter_writer::AnnotateSnippetEmitterWriter; |
| use rustc_errors::emitter::{Emitter, EmitterWriter, HumanReadableErrorType}; |
| use rustc_errors::json::JsonEmitter; |
| use rustc_errors::registry::Registry; |
| use rustc_errors::{ |
| error_code, fallback_fluent_bundle, DiagnosticBuilder, DiagnosticId, DiagnosticMessage, |
| ErrorGuaranteed, FluentBundle, IntoDiagnostic, LazyFallbackBundle, MultiSpan, Noted, |
| }; |
| use rustc_macros::HashStable_Generic; |
| pub use rustc_span::def_id::StableCrateId; |
| use rustc_span::edition::Edition; |
| use rustc_span::source_map::{FileLoader, RealFileLoader, SourceMap, Span}; |
| use rustc_span::{sym, SourceFileHashAlgorithm, Symbol}; |
| use rustc_target::asm::InlineAsmArch; |
| use rustc_target::spec::{CodeModel, PanicStrategy, RelocModel, RelroLevel}; |
| use rustc_target::spec::{ |
| DebuginfoKind, SanitizerSet, SplitDebuginfo, StackProtector, Target, TargetTriple, TlsModel, |
| }; |
| |
| use std::cell::{self, RefCell}; |
| use std::env; |
| use std::fmt; |
| use std::ops::{Div, Mul}; |
| use std::path::{Path, PathBuf}; |
| use std::str::FromStr; |
| use std::sync::Arc; |
| use std::time::Duration; |
| |
| pub struct OptimizationFuel { |
| /// If `-zfuel=crate=n` is specified, initially set to `n`, otherwise `0`. |
| remaining: u64, |
| /// We're rejecting all further optimizations. |
| out_of_fuel: bool, |
| } |
| |
| /// The behavior of the CTFE engine when an error occurs with regards to backtraces. |
| #[derive(Clone, Copy)] |
| pub enum CtfeBacktrace { |
| /// Do nothing special, return the error as usual without a backtrace. |
| Disabled, |
| /// Capture a backtrace at the point the error is created and return it in the error |
| /// (to be printed later if/when the error ever actually gets shown to the user). |
| Capture, |
| /// Capture a backtrace at the point the error is created and immediately print it out. |
| Immediate, |
| } |
| |
| /// New-type wrapper around `usize` for representing limits. Ensures that comparisons against |
| /// limits are consistent throughout the compiler. |
| #[derive(Clone, Copy, Debug, HashStable_Generic)] |
| pub struct Limit(pub usize); |
| |
| impl Limit { |
| /// Create a new limit from a `usize`. |
| pub fn new(value: usize) -> Self { |
| Limit(value) |
| } |
| |
| /// Check that `value` is within the limit. Ensures that the same comparisons are used |
| /// throughout the compiler, as mismatches can cause ICEs, see #72540. |
| #[inline] |
| pub fn value_within_limit(&self, value: usize) -> bool { |
| value <= self.0 |
| } |
| } |
| |
| impl From<usize> for Limit { |
| fn from(value: usize) -> Self { |
| Self::new(value) |
| } |
| } |
| |
| impl fmt::Display for Limit { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| self.0.fmt(f) |
| } |
| } |
| |
| impl Div<usize> for Limit { |
| type Output = Limit; |
| |
| fn div(self, rhs: usize) -> Self::Output { |
| Limit::new(self.0 / rhs) |
| } |
| } |
| |
| impl Mul<usize> for Limit { |
| type Output = Limit; |
| |
| fn mul(self, rhs: usize) -> Self::Output { |
| Limit::new(self.0 * rhs) |
| } |
| } |
| |
| impl rustc_errors::IntoDiagnosticArg for Limit { |
| fn into_diagnostic_arg(self) -> rustc_errors::DiagnosticArgValue<'static> { |
| self.to_string().into_diagnostic_arg() |
| } |
| } |
| |
| #[derive(Clone, Copy, Debug, HashStable_Generic)] |
| pub struct Limits { |
| /// The maximum recursion limit for potentially infinitely recursive |
| /// operations such as auto-dereference and monomorphization. |
| pub recursion_limit: Limit, |
| /// The size at which the `large_assignments` lint starts |
| /// being emitted. |
| pub move_size_limit: Limit, |
| /// The maximum length of types during monomorphization. |
| pub type_length_limit: Limit, |
| /// The maximum blocks a const expression can evaluate. |
| pub const_eval_limit: Limit, |
| } |
| |
| /// Represents the data associated with a compilation |
| /// session for a single crate. |
| pub struct Session { |
| pub target: Target, |
| pub host: Target, |
| pub opts: config::Options, |
| pub host_tlib_path: Lrc<SearchPath>, |
| pub target_tlib_path: Lrc<SearchPath>, |
| pub parse_sess: ParseSess, |
| pub sysroot: PathBuf, |
| /// The name of the root source file of the crate, in the local file system. |
| /// `None` means that there is no source file. |
| pub local_crate_source_file: Option<PathBuf>, |
| |
| crate_types: OnceCell<Vec<CrateType>>, |
| /// The `stable_crate_id` is constructed out of the crate name and all the |
| /// `-C metadata` arguments passed to the compiler. Its value forms a unique |
| /// global identifier for the crate. It is used to allow multiple crates |
| /// with the same name to coexist. See the |
| /// `rustc_codegen_llvm::back::symbol_names` module for more information. |
| pub stable_crate_id: OnceCell<StableCrateId>, |
| |
| features: OnceCell<rustc_feature::Features>, |
| |
| incr_comp_session: OneThread<RefCell<IncrCompSession>>, |
| /// Used for incremental compilation tests. Will only be populated if |
| /// `-Zquery-dep-graph` is specified. |
| pub cgu_reuse_tracker: CguReuseTracker, |
| |
| /// Used by `-Z self-profile`. |
| pub prof: SelfProfilerRef, |
| |
| /// Some measurements that are being gathered during compilation. |
| pub perf_stats: PerfStats, |
| |
| /// Data about code being compiled, gathered during compilation. |
| pub code_stats: CodeStats, |
| |
| /// Tracks fuel info if `-zfuel=crate=n` is specified. |
| optimization_fuel: Lock<OptimizationFuel>, |
| |
| /// Always set to zero and incremented so that we can print fuel expended by a crate. |
| pub print_fuel: AtomicU64, |
| |
| /// Loaded up early on in the initialization of this `Session` to avoid |
| /// false positives about a job server in our environment. |
| pub jobserver: Client, |
| |
| /// Cap lint level specified by a driver specifically. |
| pub driver_lint_caps: FxHashMap<lint::LintId, lint::Level>, |
| |
| /// Tracks the current behavior of the CTFE engine when an error occurs. |
| /// Options range from returning the error without a backtrace to returning an error |
| /// and immediately printing the backtrace to stderr. |
| /// The `Lock` is only used by miri to allow setting `ctfe_backtrace` after analysis when |
| /// `MIRI_BACKTRACE` is set. This makes it only apply to miri's errors and not to all CTFE |
| /// errors. |
| pub ctfe_backtrace: Lock<CtfeBacktrace>, |
| |
| /// This tracks where `-Zunleash-the-miri-inside-of-you` was used to get around a |
| /// const check, optionally with the relevant feature gate. We use this to |
| /// warn about unleashing, but with a single diagnostic instead of dozens that |
| /// drown everything else in noise. |
| miri_unleashed_features: Lock<Vec<(Span, Option<Symbol>)>>, |
| |
| /// Architecture to use for interpreting asm!. |
| pub asm_arch: Option<InlineAsmArch>, |
| |
| /// Set of enabled features for the current target. |
| pub target_features: FxHashSet<Symbol>, |
| |
| /// Set of enabled features for the current target, including unstable ones. |
| pub unstable_target_features: FxHashSet<Symbol>, |
| } |
| |
| pub struct PerfStats { |
| /// The accumulated time spent on computing symbol hashes. |
| pub symbol_hash_time: Lock<Duration>, |
| /// Total number of values canonicalized queries constructed. |
| pub queries_canonicalized: AtomicUsize, |
| /// Number of times this query is invoked. |
| pub normalize_generic_arg_after_erasing_regions: AtomicUsize, |
| /// Number of times this query is invoked. |
| pub normalize_projection_ty: AtomicUsize, |
| } |
| |
| impl Session { |
| pub fn miri_unleashed_feature(&self, span: Span, feature_gate: Option<Symbol>) { |
| self.miri_unleashed_features.lock().push((span, feature_gate)); |
| } |
| |
| fn check_miri_unleashed_features(&self) { |
| let unleashed_features = self.miri_unleashed_features.lock(); |
| if !unleashed_features.is_empty() { |
| let mut must_err = false; |
| // Create a diagnostic pointing at where things got unleashed. |
| self.emit_warning(SkippingConstChecks { |
| unleashed_features: unleashed_features |
| .iter() |
| .map(|(span, gate)| { |
| gate.map(|gate| { |
| must_err = true; |
| UnleashedFeatureHelp::Named { span: *span, gate } |
| }) |
| .unwrap_or(UnleashedFeatureHelp::Unnamed { span: *span }) |
| }) |
| .collect(), |
| }); |
| |
| // If we should err, make sure we did. |
| if must_err && self.has_errors().is_none() { |
| // We have skipped a feature gate, and not run into other errors... reject. |
| self.emit_err(NotCircumventFeature); |
| } |
| } |
| } |
| |
| /// Invoked all the way at the end to finish off diagnostics printing. |
| pub fn finish_diagnostics(&self, registry: &Registry) { |
| self.check_miri_unleashed_features(); |
| self.diagnostic().print_error_count(registry); |
| self.emit_future_breakage(); |
| } |
| |
| fn emit_future_breakage(&self) { |
| if !self.opts.json_future_incompat { |
| return; |
| } |
| |
| let diags = self.diagnostic().take_future_breakage_diagnostics(); |
| if diags.is_empty() { |
| return; |
| } |
| self.parse_sess.span_diagnostic.emit_future_breakage_report(diags); |
| } |
| |
| pub fn local_stable_crate_id(&self) -> StableCrateId { |
| self.stable_crate_id.get().copied().unwrap() |
| } |
| |
| pub fn crate_types(&self) -> &[CrateType] { |
| self.crate_types.get().unwrap().as_slice() |
| } |
| |
| pub fn init_crate_types(&self, crate_types: Vec<CrateType>) { |
| self.crate_types.set(crate_types).expect("`crate_types` was initialized twice") |
| } |
| |
| #[rustc_lint_diagnostics] |
| pub fn struct_span_warn<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| ) -> DiagnosticBuilder<'_, ()> { |
| self.diagnostic().struct_span_warn(sp, msg) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_span_warn_with_expectation<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| id: lint::LintExpectationId, |
| ) -> DiagnosticBuilder<'_, ()> { |
| self.diagnostic().struct_span_warn_with_expectation(sp, msg, id) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_span_warn_with_code<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| code: DiagnosticId, |
| ) -> DiagnosticBuilder<'_, ()> { |
| self.diagnostic().struct_span_warn_with_code(sp, msg, code) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_warn(&self, msg: impl Into<DiagnosticMessage>) -> DiagnosticBuilder<'_, ()> { |
| self.diagnostic().struct_warn(msg) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_warn_with_expectation( |
| &self, |
| msg: impl Into<DiagnosticMessage>, |
| id: lint::LintExpectationId, |
| ) -> DiagnosticBuilder<'_, ()> { |
| self.diagnostic().struct_warn_with_expectation(msg, id) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_span_allow<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| ) -> DiagnosticBuilder<'_, ()> { |
| self.diagnostic().struct_span_allow(sp, msg) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_allow(&self, msg: impl Into<DiagnosticMessage>) -> DiagnosticBuilder<'_, ()> { |
| self.diagnostic().struct_allow(msg) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_expect( |
| &self, |
| msg: impl Into<DiagnosticMessage>, |
| id: lint::LintExpectationId, |
| ) -> DiagnosticBuilder<'_, ()> { |
| self.diagnostic().struct_expect(msg, id) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_span_err<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| ) -> DiagnosticBuilder<'_, ErrorGuaranteed> { |
| self.diagnostic().struct_span_err(sp, msg) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_span_err_with_code<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| code: DiagnosticId, |
| ) -> DiagnosticBuilder<'_, ErrorGuaranteed> { |
| self.diagnostic().struct_span_err_with_code(sp, msg, code) |
| } |
| // FIXME: This method should be removed (every error should have an associated error code). |
| #[rustc_lint_diagnostics] |
| pub fn struct_err( |
| &self, |
| msg: impl Into<DiagnosticMessage>, |
| ) -> DiagnosticBuilder<'_, ErrorGuaranteed> { |
| self.parse_sess.struct_err(msg) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_err_with_code( |
| &self, |
| msg: impl Into<DiagnosticMessage>, |
| code: DiagnosticId, |
| ) -> DiagnosticBuilder<'_, ErrorGuaranteed> { |
| self.diagnostic().struct_err_with_code(msg, code) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_warn_with_code( |
| &self, |
| msg: impl Into<DiagnosticMessage>, |
| code: DiagnosticId, |
| ) -> DiagnosticBuilder<'_, ()> { |
| self.diagnostic().struct_warn_with_code(msg, code) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_span_fatal<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| ) -> DiagnosticBuilder<'_, !> { |
| self.diagnostic().struct_span_fatal(sp, msg) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_span_fatal_with_code<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| code: DiagnosticId, |
| ) -> DiagnosticBuilder<'_, !> { |
| self.diagnostic().struct_span_fatal_with_code(sp, msg, code) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn struct_fatal(&self, msg: impl Into<DiagnosticMessage>) -> DiagnosticBuilder<'_, !> { |
| self.diagnostic().struct_fatal(msg) |
| } |
| |
| #[rustc_lint_diagnostics] |
| pub fn span_fatal<S: Into<MultiSpan>>(&self, sp: S, msg: impl Into<DiagnosticMessage>) -> ! { |
| self.diagnostic().span_fatal(sp, msg) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn span_fatal_with_code<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| code: DiagnosticId, |
| ) -> ! { |
| self.diagnostic().span_fatal_with_code(sp, msg, code) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn fatal(&self, msg: impl Into<DiagnosticMessage>) -> ! { |
| self.diagnostic().fatal(msg).raise() |
| } |
| #[rustc_lint_diagnostics] |
| pub fn span_err_or_warn<S: Into<MultiSpan>>( |
| &self, |
| is_warning: bool, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| ) { |
| if is_warning { |
| self.span_warn(sp, msg); |
| } else { |
| self.span_err(sp, msg); |
| } |
| } |
| #[rustc_lint_diagnostics] |
| pub fn span_err<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| ) -> ErrorGuaranteed { |
| self.diagnostic().span_err(sp, msg) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn span_err_with_code<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| code: DiagnosticId, |
| ) { |
| self.diagnostic().span_err_with_code(sp, msg, code) |
| } |
| #[rustc_lint_diagnostics] |
| pub fn err(&self, msg: impl Into<DiagnosticMessage>) -> ErrorGuaranteed { |
| self.diagnostic().err(msg) |
| } |
| pub fn create_err<'a>( |
| &'a self, |
| err: impl IntoDiagnostic<'a>, |
| ) -> DiagnosticBuilder<'a, ErrorGuaranteed> { |
| self.parse_sess.create_err(err) |
| } |
| pub fn create_feature_err<'a>( |
| &'a self, |
| err: impl IntoDiagnostic<'a>, |
| feature: Symbol, |
| ) -> DiagnosticBuilder<'a, ErrorGuaranteed> { |
| let mut err = self.parse_sess.create_err(err); |
| if err.code.is_none() { |
| err.code = std::option::Option::Some(error_code!(E0658)); |
| } |
| add_feature_diagnostics(&mut err, &self.parse_sess, feature); |
| err |
| } |
| pub fn emit_err<'a>(&'a self, err: impl IntoDiagnostic<'a>) -> ErrorGuaranteed { |
| self.parse_sess.emit_err(err) |
| } |
| pub fn create_warning<'a>( |
| &'a self, |
| err: impl IntoDiagnostic<'a, ()>, |
| ) -> DiagnosticBuilder<'a, ()> { |
| self.parse_sess.create_warning(err) |
| } |
| pub fn emit_warning<'a>(&'a self, warning: impl IntoDiagnostic<'a, ()>) { |
| self.parse_sess.emit_warning(warning) |
| } |
| pub fn create_note<'a>( |
| &'a self, |
| note: impl IntoDiagnostic<'a, Noted>, |
| ) -> DiagnosticBuilder<'a, Noted> { |
| self.parse_sess.create_note(note) |
| } |
| pub fn emit_note<'a>(&'a self, note: impl IntoDiagnostic<'a, Noted>) -> Noted { |
| self.parse_sess.emit_note(note) |
| } |
| pub fn create_fatal<'a>( |
| &'a self, |
| fatal: impl IntoDiagnostic<'a, !>, |
| ) -> DiagnosticBuilder<'a, !> { |
| self.parse_sess.create_fatal(fatal) |
| } |
| pub fn emit_fatal<'a>(&'a self, fatal: impl IntoDiagnostic<'a, !>) -> ! { |
| self.parse_sess.emit_fatal(fatal) |
| } |
| #[inline] |
| pub fn err_count(&self) -> usize { |
| self.diagnostic().err_count() |
| } |
| pub fn has_errors(&self) -> Option<ErrorGuaranteed> { |
| self.diagnostic().has_errors() |
| } |
| pub fn has_errors_or_delayed_span_bugs(&self) -> bool { |
| self.diagnostic().has_errors_or_delayed_span_bugs() |
| } |
| pub fn abort_if_errors(&self) { |
| self.diagnostic().abort_if_errors(); |
| } |
| pub fn compile_status(&self) -> Result<(), ErrorGuaranteed> { |
| if let Some(reported) = self.diagnostic().has_errors_or_lint_errors() { |
| let _ = self.diagnostic().emit_stashed_diagnostics(); |
| Err(reported) |
| } else { |
| Ok(()) |
| } |
| } |
| // FIXME(matthewjasper) Remove this method, it should never be needed. |
| pub fn track_errors<F, T>(&self, f: F) -> Result<T, ErrorGuaranteed> |
| where |
| F: FnOnce() -> T, |
| { |
| let old_count = self.err_count(); |
| let result = f(); |
| if self.err_count() == old_count { |
| Ok(result) |
| } else { |
| Err(ErrorGuaranteed::unchecked_claim_error_was_emitted()) |
| } |
| } |
| #[allow(rustc::untranslatable_diagnostic)] |
| #[allow(rustc::diagnostic_outside_of_impl)] |
| pub fn span_warn<S: Into<MultiSpan>>(&self, sp: S, msg: impl Into<DiagnosticMessage>) { |
| self.diagnostic().span_warn(sp, msg) |
| } |
| #[allow(rustc::untranslatable_diagnostic)] |
| #[allow(rustc::diagnostic_outside_of_impl)] |
| pub fn span_warn_with_code<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| code: DiagnosticId, |
| ) { |
| self.diagnostic().span_warn_with_code(sp, msg, code) |
| } |
| pub fn warn(&self, msg: impl Into<DiagnosticMessage>) { |
| self.diagnostic().warn(msg) |
| } |
| /// Delay a span_bug() call until abort_if_errors() |
| #[track_caller] |
| pub fn delay_span_bug<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| ) -> ErrorGuaranteed { |
| self.diagnostic().delay_span_bug(sp, msg) |
| } |
| |
| /// Used for code paths of expensive computations that should only take place when |
| /// warnings or errors are emitted. If no messages are emitted ("good path"), then |
| /// it's likely a bug. |
| pub fn delay_good_path_bug(&self, msg: impl Into<DiagnosticMessage>) { |
| if self.opts.unstable_opts.print_type_sizes |
| || self.opts.unstable_opts.query_dep_graph |
| || self.opts.unstable_opts.dump_mir.is_some() |
| || self.opts.unstable_opts.unpretty.is_some() |
| || self.opts.output_types.contains_key(&OutputType::Mir) |
| || std::env::var_os("RUSTC_LOG").is_some() |
| { |
| return; |
| } |
| |
| self.diagnostic().delay_good_path_bug(msg) |
| } |
| |
| pub fn note_without_error(&self, msg: impl Into<DiagnosticMessage>) { |
| self.diagnostic().note_without_error(msg) |
| } |
| pub fn span_note_without_error<S: Into<MultiSpan>>( |
| &self, |
| sp: S, |
| msg: impl Into<DiagnosticMessage>, |
| ) { |
| self.diagnostic().span_note_without_error(sp, msg) |
| } |
| #[allow(rustc::untranslatable_diagnostic)] |
| #[allow(rustc::diagnostic_outside_of_impl)] |
| pub fn struct_note_without_error( |
| &self, |
| msg: impl Into<DiagnosticMessage>, |
| ) -> DiagnosticBuilder<'_, ()> { |
| self.diagnostic().struct_note_without_error(msg) |
| } |
| |
| #[inline] |
| pub fn diagnostic(&self) -> &rustc_errors::Handler { |
| &self.parse_sess.span_diagnostic |
| } |
| |
| #[inline] |
| pub fn source_map(&self) -> &SourceMap { |
| self.parse_sess.source_map() |
| } |
| |
| /// Returns `true` if internal lints should be added to the lint store - i.e. if |
| /// `-Zunstable-options` is provided and this isn't rustdoc (internal lints can trigger errors |
| /// to be emitted under rustdoc). |
| pub fn enable_internal_lints(&self) -> bool { |
| self.unstable_options() && !self.opts.actually_rustdoc |
| } |
| |
| pub fn instrument_coverage(&self) -> bool { |
| self.opts.cg.instrument_coverage() != InstrumentCoverage::Off |
| } |
| |
| pub fn instrument_coverage_except_unused_generics(&self) -> bool { |
| self.opts.cg.instrument_coverage() == InstrumentCoverage::ExceptUnusedGenerics |
| } |
| |
| pub fn instrument_coverage_except_unused_functions(&self) -> bool { |
| self.opts.cg.instrument_coverage() == InstrumentCoverage::ExceptUnusedFunctions |
| } |
| |
| /// Gets the features enabled for the current compilation session. |
| /// DO NOT USE THIS METHOD if there is a TyCtxt available, as it circumvents |
| /// dependency tracking. Use tcx.features() instead. |
| #[inline] |
| pub fn features_untracked(&self) -> &rustc_feature::Features { |
| self.features.get().unwrap() |
| } |
| |
| pub fn init_features(&self, features: rustc_feature::Features) { |
| match self.features.set(features) { |
| Ok(()) => {} |
| Err(_) => panic!("`features` was initialized twice"), |
| } |
| } |
| |
| pub fn is_sanitizer_cfi_enabled(&self) -> bool { |
| self.opts.unstable_opts.sanitizer.contains(SanitizerSet::CFI) |
| } |
| |
| /// Check whether this compile session and crate type use static crt. |
| pub fn crt_static(&self, crate_type: Option<CrateType>) -> bool { |
| if !self.target.crt_static_respected { |
| // If the target does not opt in to crt-static support, use its default. |
| return self.target.crt_static_default; |
| } |
| |
| 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"); |
| |
| // JUSTIFICATION: necessary use of crate_types directly (see FIXME below) |
| #[allow(rustc::bad_opt_access)] |
| if found_positive || found_negative { |
| found_positive |
| } else if crate_type == Some(CrateType::ProcMacro) |
| || crate_type == None && self.opts.crate_types.contains(&CrateType::ProcMacro) |
| { |
| // FIXME: When crate_type is not available, |
| // we use compiler options to determine the crate_type. |
| // We can't check `#![crate_type = "proc-macro"]` here. |
| false |
| } else { |
| self.target.crt_static_default |
| } |
| } |
| |
| pub fn is_wasi_reactor(&self) -> bool { |
| self.target.options.os == "wasi" |
| && matches!( |
| self.opts.unstable_opts.wasi_exec_model, |
| Some(config::WasiExecModel::Reactor) |
| ) |
| } |
| |
| /// Returns `true` if the target can use the current split debuginfo configuration. |
| pub fn target_can_use_split_dwarf(&self) -> bool { |
| self.target.debuginfo_kind == DebuginfoKind::Dwarf |
| } |
| |
| pub fn generate_proc_macro_decls_symbol(&self, stable_crate_id: StableCrateId) -> String { |
| format!("__rustc_proc_macro_decls_{:08x}__", stable_crate_id.to_u64()) |
| } |
| |
| pub fn target_filesearch(&self, kind: PathKind) -> filesearch::FileSearch<'_> { |
| filesearch::FileSearch::new( |
| &self.sysroot, |
| self.opts.target_triple.triple(), |
| &self.opts.search_paths, |
| &self.target_tlib_path, |
| kind, |
| ) |
| } |
| pub fn host_filesearch(&self, kind: PathKind) -> filesearch::FileSearch<'_> { |
| filesearch::FileSearch::new( |
| &self.sysroot, |
| config::host_triple(), |
| &self.opts.search_paths, |
| &self.host_tlib_path, |
| kind, |
| ) |
| } |
| |
| /// Returns a list of directories where target-specific tool binaries are located. |
| pub fn get_tools_search_paths(&self, self_contained: bool) -> Vec<PathBuf> { |
| let rustlib_path = rustc_target::target_rustlib_path(&self.sysroot, &config::host_triple()); |
| let p = PathBuf::from_iter([ |
| Path::new(&self.sysroot), |
| Path::new(&rustlib_path), |
| Path::new("bin"), |
| ]); |
| if self_contained { vec![p.clone(), p.join("self-contained")] } else { vec![p] } |
| } |
| |
| 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 { |
| panic!("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 { |
| panic!("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(), |
| IncrCompSession::InvalidBecauseOfErrors { .. } => return, |
| _ => panic!("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 => panic!( |
| "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>> { |
| self.opts.incremental.as_ref().map(|_| self.incr_comp_session_dir()) |
| } |
| |
| pub fn print_perf_stats(&self) { |
| eprintln!( |
| "Total time spent computing symbol hashes: {}", |
| duration_to_secs_str(*self.perf_stats.symbol_hash_time.lock()) |
| ); |
| eprintln!( |
| "Total queries canonicalized: {}", |
| self.perf_stats.queries_canonicalized.load(Ordering::Relaxed) |
| ); |
| eprintln!( |
| "normalize_generic_arg_after_erasing_regions: {}", |
| self.perf_stats.normalize_generic_arg_after_erasing_regions.load(Ordering::Relaxed) |
| ); |
| eprintln!( |
| "normalize_projection_ty: {}", |
| self.perf_stats.normalize_projection_ty.load(Ordering::Relaxed) |
| ); |
| } |
| |
| /// 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; |
| if let Some((ref c, _)) = self.opts.unstable_opts.fuel { |
| if c == crate_name { |
| assert_eq!(self.threads(), 1); |
| let mut fuel = self.optimization_fuel.lock(); |
| ret = fuel.remaining != 0; |
| if fuel.remaining == 0 && !fuel.out_of_fuel { |
| if self.diagnostic().can_emit_warnings() { |
| // We only call `msg` in case we can actually emit warnings. |
| // Otherwise, this could cause a `delay_good_path_bug` to |
| // trigger (issue #79546). |
| self.warn(&format!("optimization-fuel-exhausted: {}", msg())); |
| } |
| fuel.out_of_fuel = true; |
| } else if fuel.remaining > 0 { |
| fuel.remaining -= 1; |
| } |
| } |
| } |
| if let Some(ref c) = self.opts.unstable_opts.print_fuel { |
| if c == crate_name { |
| assert_eq!(self.threads(), 1); |
| self.print_fuel.fetch_add(1, SeqCst); |
| } |
| } |
| ret |
| } |
| |
| pub fn rust_2015(&self) -> bool { |
| self.edition() == Edition::Edition2015 |
| } |
| |
| /// Are we allowed to use features from the Rust 2018 edition? |
| pub fn rust_2018(&self) -> bool { |
| self.edition() >= Edition::Edition2018 |
| } |
| |
| /// Are we allowed to use features from the Rust 2021 edition? |
| pub fn rust_2021(&self) -> bool { |
| self.edition() >= Edition::Edition2021 |
| } |
| |
| /// Are we allowed to use features from the Rust 2024 edition? |
| pub fn rust_2024(&self) -> bool { |
| self.edition() >= Edition::Edition2024 |
| } |
| |
| /// Returns `true` if we cannot skip the PLT for shared library calls. |
| pub fn needs_plt(&self) -> bool { |
| // Check if the current target usually needs PLT to be enabled. |
| // The user can use the command line flag to override it. |
| let needs_plt = self.target.needs_plt; |
| |
| let dbg_opts = &self.opts.unstable_opts; |
| |
| let relro_level = dbg_opts.relro_level.unwrap_or(self.target.relro_level); |
| |
| // Only enable this optimization by default if full relro is also enabled. |
| // In this case, lazy binding was already unavailable, so nothing is lost. |
| // This also ensures `-Wl,-z,now` is supported by the linker. |
| let full_relro = RelroLevel::Full == relro_level; |
| |
| // If user didn't explicitly forced us to use / skip the PLT, |
| // then try to skip it where possible. |
| dbg_opts.plt.unwrap_or(needs_plt || !full_relro) |
| } |
| |
| /// Checks if LLVM lifetime markers should be emitted. |
| pub fn emit_lifetime_markers(&self) -> bool { |
| self.opts.optimize != config::OptLevel::No |
| // AddressSanitizer uses lifetimes to detect use after scope bugs. |
| // MemorySanitizer uses lifetimes to detect use of uninitialized stack variables. |
| // HWAddressSanitizer will use lifetimes to detect use after scope bugs in the future. |
| || self.opts.unstable_opts.sanitizer.intersects(SanitizerSet::ADDRESS | SanitizerSet::MEMORY | SanitizerSet::HWADDRESS) |
| } |
| |
| pub fn is_proc_macro_attr(&self, attr: &Attribute) -> bool { |
| [sym::proc_macro, sym::proc_macro_attribute, sym::proc_macro_derive] |
| .iter() |
| .any(|kind| attr.has_name(*kind)) |
| } |
| |
| pub fn contains_name(&self, attrs: &[Attribute], name: Symbol) -> bool { |
| attrs.iter().any(|item| item.has_name(name)) |
| } |
| |
| pub fn find_by_name<'a>( |
| &'a self, |
| attrs: &'a [Attribute], |
| name: Symbol, |
| ) -> Option<&'a Attribute> { |
| attrs.iter().find(|attr| attr.has_name(name)) |
| } |
| |
| pub fn filter_by_name<'a>( |
| &'a self, |
| attrs: &'a [Attribute], |
| name: Symbol, |
| ) -> impl Iterator<Item = &'a Attribute> { |
| attrs.iter().filter(move |attr| attr.has_name(name)) |
| } |
| |
| pub fn first_attr_value_str_by_name( |
| &self, |
| attrs: &[Attribute], |
| name: Symbol, |
| ) -> Option<Symbol> { |
| attrs.iter().find(|at| at.has_name(name)).and_then(|at| at.value_str()) |
| } |
| } |
| |
| // JUSTIFICATION: defn of the suggested wrapper fns |
| #[allow(rustc::bad_opt_access)] |
| impl Session { |
| pub fn verbose(&self) -> bool { |
| self.opts.unstable_opts.verbose |
| } |
| |
| pub fn instrument_mcount(&self) -> bool { |
| self.opts.unstable_opts.instrument_mcount |
| } |
| |
| pub fn time_passes(&self) -> bool { |
| self.opts.unstable_opts.time_passes |
| } |
| |
| pub fn time_llvm_passes(&self) -> bool { |
| self.opts.unstable_opts.time_llvm_passes |
| } |
| |
| pub fn meta_stats(&self) -> bool { |
| self.opts.unstable_opts.meta_stats |
| } |
| |
| pub fn asm_comments(&self) -> bool { |
| self.opts.unstable_opts.asm_comments |
| } |
| |
| pub fn verify_llvm_ir(&self) -> bool { |
| self.opts.unstable_opts.verify_llvm_ir || option_env!("RUSTC_VERIFY_LLVM_IR").is_some() |
| } |
| |
| pub fn print_llvm_passes(&self) -> bool { |
| self.opts.unstable_opts.print_llvm_passes |
| } |
| |
| pub fn binary_dep_depinfo(&self) -> bool { |
| self.opts.unstable_opts.binary_dep_depinfo |
| } |
| |
| pub fn mir_opt_level(&self) -> usize { |
| self.opts |
| .unstable_opts |
| .mir_opt_level |
| .unwrap_or_else(|| if self.opts.optimize != OptLevel::No { 2 } else { 1 }) |
| } |
| |
| /// Calculates the flavor of LTO to use for this compilation. |
| pub fn lto(&self) -> config::Lto { |
| // If our target has codegen requirements ignore the command line |
| if self.target.requires_lto { |
| return config::Lto::Fat; |
| } |
| |
| // If the user specified something, return that. If they only said `-C |
| // lto` and we've for whatever reason forced off ThinLTO via the CLI, |
| // then ensure we can't use a ThinLTO. |
| match self.opts.cg.lto { |
| config::LtoCli::Unspecified => { |
| // The compiler was invoked without the `-Clto` flag. Fall |
| // through to the default handling |
| } |
| config::LtoCli::No => { |
| // The user explicitly opted out of any kind of LTO |
| return config::Lto::No; |
| } |
| config::LtoCli::Yes | config::LtoCli::Fat | config::LtoCli::NoParam => { |
| // All of these mean fat LTO |
| return config::Lto::Fat; |
| } |
| config::LtoCli::Thin => { |
| return if self.opts.cli_forced_thinlto_off { |
| config::Lto::Fat |
| } else { |
| config::Lto::Thin |
| }; |
| } |
| } |
| |
| // Ok at this point the target doesn't require anything and the user |
| // hasn't asked for anything. Our next decision is whether or not |
| // we enable "auto" ThinLTO where we use multiple codegen units and |
| // then do ThinLTO over those codegen units. The logic below will |
| // either return `No` or `ThinLocal`. |
| |
| // If processing command line options determined that we're incompatible |
| // with ThinLTO (e.g., `-C lto --emit llvm-ir`) then return that option. |
| if self.opts.cli_forced_thinlto_off { |
| return config::Lto::No; |
| } |
| |
| // If `-Z thinlto` specified process that, but note that this is mostly |
| // a deprecated option now that `-C lto=thin` exists. |
| if let Some(enabled) = self.opts.unstable_opts.thinlto { |
| if enabled { |
| return config::Lto::ThinLocal; |
| } else { |
| return config::Lto::No; |
| } |
| } |
| |
| // If there's only one codegen unit and LTO isn't enabled then there's |
| // no need for ThinLTO so just return false. |
| if self.codegen_units() == 1 { |
| return config::Lto::No; |
| } |
| |
| // Now we're in "defaults" territory. By default we enable ThinLTO for |
| // optimized compiles (anything greater than O0). |
| match self.opts.optimize { |
| config::OptLevel::No => config::Lto::No, |
| _ => config::Lto::ThinLocal, |
| } |
| } |
| |
| /// Returns the panic strategy for this compile session. If the user explicitly selected one |
| /// using '-C panic', use that, otherwise use the panic strategy defined by the target. |
| pub fn panic_strategy(&self) -> PanicStrategy { |
| self.opts.cg.panic.unwrap_or(self.target.panic_strategy) |
| } |
| |
| pub fn fewer_names(&self) -> bool { |
| if let Some(fewer_names) = self.opts.unstable_opts.fewer_names { |
| fewer_names |
| } else { |
| let more_names = self.opts.output_types.contains_key(&OutputType::LlvmAssembly) |
| || self.opts.output_types.contains_key(&OutputType::Bitcode) |
| // AddressSanitizer and MemorySanitizer use alloca name when reporting an issue. |
| || self.opts.unstable_opts.sanitizer.intersects(SanitizerSet::ADDRESS | SanitizerSet::MEMORY); |
| !more_names |
| } |
| } |
| |
| pub fn unstable_options(&self) -> bool { |
| self.opts.unstable_opts.unstable_options |
| } |
| |
| pub fn is_nightly_build(&self) -> bool { |
| self.opts.unstable_features.is_nightly_build() |
| } |
| |
| pub fn overflow_checks(&self) -> bool { |
| self.opts.cg.overflow_checks.unwrap_or(self.opts.debug_assertions) |
| } |
| |
| pub fn relocation_model(&self) -> RelocModel { |
| self.opts.cg.relocation_model.unwrap_or(self.target.relocation_model) |
| } |
| |
| pub fn code_model(&self) -> Option<CodeModel> { |
| self.opts.cg.code_model.or(self.target.code_model) |
| } |
| |
| pub fn tls_model(&self) -> TlsModel { |
| self.opts.unstable_opts.tls_model.unwrap_or(self.target.tls_model) |
| } |
| |
| pub fn split_debuginfo(&self) -> SplitDebuginfo { |
| self.opts.cg.split_debuginfo.unwrap_or(self.target.split_debuginfo) |
| } |
| |
| pub fn stack_protector(&self) -> StackProtector { |
| if self.target.options.supports_stack_protector { |
| self.opts.unstable_opts.stack_protector |
| } else { |
| StackProtector::None |
| } |
| } |
| |
| pub fn must_emit_unwind_tables(&self) -> bool { |
| // This is used to control the emission of the `uwtable` attribute on |
| // LLVM functions. |
| // |
| // Unwind tables are needed when compiling with `-C panic=unwind`, but |
| // LLVM won't omit unwind tables unless the function is also marked as |
| // `nounwind`, so users are allowed to disable `uwtable` emission. |
| // Historically rustc always emits `uwtable` attributes by default, so |
| // even they can be disabled, they're still emitted by default. |
| // |
| // On some targets (including windows), however, exceptions include |
| // other events such as illegal instructions, segfaults, etc. This means |
| // that on Windows we end up still needing unwind tables even if the `-C |
| // panic=abort` flag is passed. |
| // |
| // You can also find more info on why Windows needs unwind tables in: |
| // https://bugzilla.mozilla.org/show_bug.cgi?id=1302078 |
| // |
| // If a target requires unwind tables, then they must be emitted. |
| // Otherwise, we can defer to the `-C force-unwind-tables=<yes/no>` |
| // value, if it is provided, or disable them, if not. |
| self.target.requires_uwtable |
| || self.opts.cg.force_unwind_tables.unwrap_or( |
| self.panic_strategy() == PanicStrategy::Unwind || self.target.default_uwtable, |
| ) |
| } |
| |
| /// Returns the number of query threads that should be used for this |
| /// compilation |
| pub fn threads(&self) -> usize { |
| self.opts.unstable_opts.threads |
| } |
| |
| /// 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.default_codegen_units { |
| return n as usize; |
| } |
| |
| // If incremental compilation is turned on, we default to a high number |
| // codegen units in order to reduce the "collateral damage" small |
| // changes cause. |
| if self.opts.incremental.is_some() { |
| return 256; |
| } |
| |
| // Why is 16 codegen units the default all the time? |
| // |
| // The main reason for enabling multiple codegen units by default is to |
| // leverage the ability for the codegen backend to do codegen and |
| // optimization in parallel. This allows us, especially for large crates, to |
| // make good use of all available resources on the machine once we've |
| // hit that stage of compilation. Large crates especially then often |
| // take a long time in codegen/optimization and this helps us amortize that |
| // cost. |
| // |
| // Note that a 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 a 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 |
| // |
| // Note that the main cost of codegen units is that it prevents LLVM |
| // from inlining across codegen units. Users in general don't have a lot |
| // of control over how codegen units are split up so it's our job in the |
| // compiler to ensure that undue performance isn't lost when using |
| // codegen units (aka we can't require everyone to slap `#[inline]` on |
| // everything). |
| // |
| // If we're compiling at `-O0` then the number doesn't really matter too |
| // much because performance doesn't matter and inlining is ok to lose. |
| // In debug mode we just want to try to guarantee that no cpu is stuck |
| // doing work that could otherwise be farmed to others. |
| // |
| // In release mode, however (O1 and above) performance does indeed |
| // matter! To recover the loss in performance due to inlining we'll be |
| // enabling ThinLTO by default (the function for which is just below). |
| // This will ensure that we recover any inlining wins we otherwise lost |
| // through codegen unit partitioning. |
| // |
| // --- |
| // |
| // Ok that's a lot of words but the basic tl;dr; is that we want a high |
| // number here -- but not too high. Additionally we're "safe" to have it |
| // always at the same number at all optimization levels. |
| // |
| // As a result 16 was chosen here! Mostly because it was a power of 2 |
| // and most benchmarks agreed it was roughly a local optimum. Not very |
| // scientific. |
| 16 |
| } |
| |
| pub fn teach(&self, code: &DiagnosticId) -> bool { |
| self.opts.unstable_opts.teach && self.diagnostic().must_teach(code) |
| } |
| |
| pub fn edition(&self) -> Edition { |
| self.opts.edition |
| } |
| |
| pub fn link_dead_code(&self) -> bool { |
| self.opts.cg.link_dead_code.unwrap_or(false) |
| } |
| } |
| |
| // JUSTIFICATION: part of session construction |
| #[allow(rustc::bad_opt_access)] |
| fn default_emitter( |
| sopts: &config::Options, |
| registry: rustc_errors::registry::Registry, |
| source_map: Lrc<SourceMap>, |
| bundle: Option<Lrc<FluentBundle>>, |
| fallback_bundle: LazyFallbackBundle, |
| ) -> Box<dyn Emitter + sync::Send> { |
| let macro_backtrace = sopts.unstable_opts.macro_backtrace; |
| match sopts.error_format { |
| config::ErrorOutputType::HumanReadable(kind) => { |
| let (short, color_config) = kind.unzip(); |
| |
| if let HumanReadableErrorType::AnnotateSnippet(_) = kind { |
| let emitter = AnnotateSnippetEmitterWriter::new( |
| Some(source_map), |
| bundle, |
| fallback_bundle, |
| short, |
| macro_backtrace, |
| ); |
| Box::new(emitter.ui_testing(sopts.unstable_opts.ui_testing)) |
| } else { |
| let emitter = EmitterWriter::stderr( |
| color_config, |
| Some(source_map), |
| bundle, |
| fallback_bundle, |
| short, |
| sopts.unstable_opts.teach, |
| sopts.diagnostic_width, |
| macro_backtrace, |
| ); |
| Box::new(emitter.ui_testing(sopts.unstable_opts.ui_testing)) |
| } |
| } |
| config::ErrorOutputType::Json { pretty, json_rendered } => Box::new( |
| JsonEmitter::stderr( |
| Some(registry), |
| source_map, |
| bundle, |
| fallback_bundle, |
| pretty, |
| json_rendered, |
| sopts.diagnostic_width, |
| macro_backtrace, |
| ) |
| .ui_testing(sopts.unstable_opts.ui_testing), |
| ), |
| } |
| } |
| |
| // JUSTIFICATION: literally session construction |
| #[allow(rustc::bad_opt_access)] |
| pub fn build_session( |
| sopts: config::Options, |
| local_crate_source_file: Option<PathBuf>, |
| bundle: Option<Lrc<rustc_errors::FluentBundle>>, |
| registry: rustc_errors::registry::Registry, |
| driver_lint_caps: FxHashMap<lint::LintId, lint::Level>, |
| file_loader: Option<Box<dyn FileLoader + Send + Sync + 'static>>, |
| target_override: Option<Target>, |
| ) -> 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() |
| .rfind(|&&(ref key, _)| *key == "warnings") |
| .map_or(false, |&(_, level)| level == lint::Allow); |
| let cap_lints_allow = sopts.lint_cap.map_or(false, |cap| cap == lint::Allow); |
| let can_emit_warnings = !(warnings_allow || cap_lints_allow); |
| |
| let sysroot = match &sopts.maybe_sysroot { |
| Some(sysroot) => sysroot.clone(), |
| None => filesearch::get_or_default_sysroot(), |
| }; |
| |
| let target_cfg = config::build_target_config(&sopts, target_override, &sysroot); |
| let host_triple = TargetTriple::from_triple(config::host_triple()); |
| let (host, target_warnings) = Target::search(&host_triple, &sysroot).unwrap_or_else(|e| { |
| early_error(sopts.error_format, &format!("Error loading host specification: {e}")) |
| }); |
| for warning in target_warnings.warning_messages() { |
| early_warn(sopts.error_format, &warning) |
| } |
| |
| let loader = file_loader.unwrap_or_else(|| Box::new(RealFileLoader)); |
| let hash_kind = sopts.unstable_opts.src_hash_algorithm.unwrap_or_else(|| { |
| if target_cfg.is_like_msvc { |
| SourceFileHashAlgorithm::Sha1 |
| } else { |
| SourceFileHashAlgorithm::Md5 |
| } |
| }); |
| let source_map = Lrc::new(SourceMap::with_file_loader_and_hash_kind( |
| loader, |
| sopts.file_path_mapping(), |
| hash_kind, |
| )); |
| |
| let fallback_bundle = fallback_fluent_bundle( |
| rustc_errors::DEFAULT_LOCALE_RESOURCES, |
| sopts.unstable_opts.translate_directionality_markers, |
| ); |
| let emitter = default_emitter(&sopts, registry, source_map.clone(), bundle, fallback_bundle); |
| |
| let span_diagnostic = rustc_errors::Handler::with_emitter_and_flags( |
| emitter, |
| sopts.unstable_opts.diagnostic_handler_flags(can_emit_warnings), |
| ); |
| |
| let self_profiler = if let SwitchWithOptPath::Enabled(ref d) = sopts.unstable_opts.self_profile |
| { |
| let directory = |
| if let Some(ref directory) = d { directory } else { std::path::Path::new(".") }; |
| |
| let profiler = SelfProfiler::new( |
| directory, |
| sopts.crate_name.as_deref(), |
| sopts.unstable_opts.self_profile_events.as_ref().map(|xs| &xs[..]), |
| &sopts.unstable_opts.self_profile_counter, |
| ); |
| match profiler { |
| Ok(profiler) => Some(Arc::new(profiler)), |
| Err(e) => { |
| early_warn(sopts.error_format, &format!("failed to create profiler: {e}")); |
| None |
| } |
| } |
| } else { |
| None |
| }; |
| |
| let mut parse_sess = ParseSess::with_span_handler(span_diagnostic, source_map); |
| parse_sess.assume_incomplete_release = sopts.unstable_opts.assume_incomplete_release; |
| |
| let host_triple = config::host_triple(); |
| let target_triple = sopts.target_triple.triple(); |
| let host_tlib_path = Lrc::new(SearchPath::from_sysroot_and_triple(&sysroot, host_triple)); |
| let target_tlib_path = if host_triple == target_triple { |
| // Use the same `SearchPath` if host and target triple are identical to avoid unnecessary |
| // rescanning of the target lib path and an unnecessary allocation. |
| host_tlib_path.clone() |
| } else { |
| Lrc::new(SearchPath::from_sysroot_and_triple(&sysroot, target_triple)) |
| }; |
| |
| 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).0); |
| |
| let optimization_fuel = Lock::new(OptimizationFuel { |
| remaining: sopts.unstable_opts.fuel.as_ref().map_or(0, |i| i.1), |
| out_of_fuel: false, |
| }); |
| let print_fuel = AtomicU64::new(0); |
| |
| let cgu_reuse_tracker = if sopts.unstable_opts.query_dep_graph { |
| CguReuseTracker::new() |
| } else { |
| CguReuseTracker::new_disabled() |
| }; |
| |
| let prof = SelfProfilerRef::new(self_profiler, sopts.unstable_opts.time_passes); |
| |
| let ctfe_backtrace = Lock::new(match env::var("RUSTC_CTFE_BACKTRACE") { |
| Ok(ref val) if val == "immediate" => CtfeBacktrace::Immediate, |
| Ok(ref val) if val != "0" => CtfeBacktrace::Capture, |
| _ => CtfeBacktrace::Disabled, |
| }); |
| |
| let asm_arch = |
| if target_cfg.allow_asm { InlineAsmArch::from_str(&target_cfg.arch).ok() } else { None }; |
| |
| let sess = Session { |
| target: target_cfg, |
| host, |
| opts: sopts, |
| host_tlib_path, |
| target_tlib_path, |
| parse_sess, |
| sysroot, |
| local_crate_source_file, |
| crate_types: OnceCell::new(), |
| stable_crate_id: OnceCell::new(), |
| features: OnceCell::new(), |
| incr_comp_session: OneThread::new(RefCell::new(IncrCompSession::NotInitialized)), |
| cgu_reuse_tracker, |
| prof, |
| perf_stats: PerfStats { |
| symbol_hash_time: Lock::new(Duration::from_secs(0)), |
| queries_canonicalized: AtomicUsize::new(0), |
| normalize_generic_arg_after_erasing_regions: AtomicUsize::new(0), |
| normalize_projection_ty: AtomicUsize::new(0), |
| }, |
| code_stats: Default::default(), |
| optimization_fuel, |
| print_fuel, |
| jobserver: jobserver::client(), |
| driver_lint_caps, |
| ctfe_backtrace, |
| miri_unleashed_features: Lock::new(Default::default()), |
| asm_arch, |
| target_features: FxHashSet::default(), |
| unstable_target_features: FxHashSet::default(), |
| }; |
| |
| validate_commandline_args_with_session_available(&sess); |
| |
| sess |
| } |
| |
| /// Validate command line arguments with a `Session`. |
| /// |
| /// If it is useful to have a Session available already for validating a commandline argument, you |
| /// can do so here. |
| // JUSTIFICATION: needs to access args to validate them |
| #[allow(rustc::bad_opt_access)] |
| fn validate_commandline_args_with_session_available(sess: &Session) { |
| // Since we don't know if code in an rlib will be linked to statically or |
| // dynamically downstream, rustc generates `__imp_` symbols that help linkers |
| // on Windows deal with this lack of knowledge (#27438). Unfortunately, |
| // these manually generated symbols confuse LLD when it tries to merge |
| // bitcode during ThinLTO. Therefore we disallow dynamic linking on Windows |
| // when compiling for LLD ThinLTO. This way we can validly just not generate |
| // the `dllimport` attributes and `__imp_` symbols in that case. |
| if sess.opts.cg.linker_plugin_lto.enabled() |
| && sess.opts.cg.prefer_dynamic |
| && sess.target.is_like_windows |
| { |
| sess.emit_err(LinkerPluginToWindowsNotSupported); |
| } |
| |
| // Make sure that any given profiling data actually exists so LLVM can't |
| // decide to silently skip PGO. |
| if let Some(ref path) = sess.opts.cg.profile_use { |
| if !path.exists() { |
| sess.emit_err(ProfileUseFileDoesNotExist { path }); |
| } |
| } |
| |
| // Do the same for sample profile data. |
| if let Some(ref path) = sess.opts.unstable_opts.profile_sample_use { |
| if !path.exists() { |
| sess.emit_err(ProfileSampleUseFileDoesNotExist { path }); |
| } |
| } |
| |
| // Unwind tables cannot be disabled if the target requires them. |
| if let Some(include_uwtables) = sess.opts.cg.force_unwind_tables { |
| if sess.target.requires_uwtable && !include_uwtables { |
| sess.emit_err(TargetRequiresUnwindTables); |
| } |
| } |
| |
| // Sanitizers can only be used on platforms that we know have working sanitizer codegen. |
| let supported_sanitizers = sess.target.options.supported_sanitizers; |
| let unsupported_sanitizers = sess.opts.unstable_opts.sanitizer - supported_sanitizers; |
| match unsupported_sanitizers.into_iter().count() { |
| 0 => {} |
| 1 => { |
| sess.emit_err(SanitizerNotSupported { us: unsupported_sanitizers.to_string() }); |
| } |
| _ => { |
| sess.emit_err(SanitizersNotSupported { us: unsupported_sanitizers.to_string() }); |
| } |
| } |
| // Cannot mix and match sanitizers. |
| let mut sanitizer_iter = sess.opts.unstable_opts.sanitizer.into_iter(); |
| if let (Some(first), Some(second)) = (sanitizer_iter.next(), sanitizer_iter.next()) { |
| sess.emit_err(CannotMixAndMatchSanitizers { |
| first: first.to_string(), |
| second: second.to_string(), |
| }); |
| } |
| |
| // Cannot enable crt-static with sanitizers on Linux |
| if sess.crt_static(None) && !sess.opts.unstable_opts.sanitizer.is_empty() { |
| sess.emit_err(CannotEnableCrtStaticLinux); |
| } |
| |
| // LLVM CFI and VFE both require LTO. |
| if sess.lto() != config::Lto::Fat { |
| if sess.is_sanitizer_cfi_enabled() { |
| sess.emit_err(SanitizerCfiEnabled); |
| } |
| if sess.opts.unstable_opts.virtual_function_elimination { |
| sess.emit_err(UnstableVirtualFunctionElimination); |
| } |
| } |
| |
| if sess.opts.unstable_opts.stack_protector != StackProtector::None { |
| if !sess.target.options.supports_stack_protector { |
| sess.emit_warning(StackProtectorNotSupportedForTarget { |
| stack_protector: sess.opts.unstable_opts.stack_protector, |
| target_triple: &sess.opts.target_triple, |
| }); |
| } |
| } |
| |
| if let Some(dwarf_version) = sess.opts.unstable_opts.dwarf_version { |
| if dwarf_version > 5 { |
| sess.emit_err(UnsupportedDwarfVersion { dwarf_version }); |
| } |
| } |
| |
| if !sess.target.options.supported_split_debuginfo.contains(&sess.split_debuginfo()) |
| && !sess.opts.unstable_opts.unstable_options |
| { |
| sess.emit_err(SplitDebugInfoUnstablePlatform { debuginfo: sess.split_debuginfo() }); |
| } |
| } |
| |
| /// 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 }, |
| } |
| |
| fn early_error_handler(output: config::ErrorOutputType) -> rustc_errors::Handler { |
| let fallback_bundle = fallback_fluent_bundle(rustc_errors::DEFAULT_LOCALE_RESOURCES, false); |
| let emitter: Box<dyn Emitter + sync::Send> = match output { |
| config::ErrorOutputType::HumanReadable(kind) => { |
| let (short, color_config) = kind.unzip(); |
| Box::new(EmitterWriter::stderr( |
| color_config, |
| None, |
| None, |
| fallback_bundle, |
| short, |
| false, |
| None, |
| false, |
| )) |
| } |
| config::ErrorOutputType::Json { pretty, json_rendered } => { |
| Box::new(JsonEmitter::basic(pretty, json_rendered, None, fallback_bundle, None, false)) |
| } |
| }; |
| rustc_errors::Handler::with_emitter(true, None, emitter) |
| } |
| |
| #[allow(rustc::untranslatable_diagnostic)] |
| #[allow(rustc::diagnostic_outside_of_impl)] |
| pub fn early_error_no_abort(output: config::ErrorOutputType, msg: &str) -> ErrorGuaranteed { |
| early_error_handler(output).struct_err(msg).emit() |
| } |
| |
| #[allow(rustc::untranslatable_diagnostic)] |
| #[allow(rustc::diagnostic_outside_of_impl)] |
| pub fn early_error(output: config::ErrorOutputType, msg: &str) -> ! { |
| early_error_handler(output).struct_fatal(msg).emit() |
| } |
| |
| #[allow(rustc::untranslatable_diagnostic)] |
| #[allow(rustc::diagnostic_outside_of_impl)] |
| pub fn early_warn(output: config::ErrorOutputType, msg: &str) { |
| early_error_handler(output).struct_warn(msg).emit() |
| } |
