1use std::borrow::Borrow;
2use std::collections::hash_map::Entry;
3use std::fs::File;
4use std::io::{Read, Seek, Write};
5use std::path::{Path, PathBuf};
6use std::sync::Arc;
7
8use rustc_attr_data_structures::EncodeCrossCrate;
9use rustc_data_structures::fx::{FxIndexMap, FxIndexSet};
10use rustc_data_structures::memmap::{Mmap, MmapMut};
11use rustc_data_structures::sync::{join, par_for_each_in};
12use rustc_data_structures::temp_dir::MaybeTempDir;
13use rustc_data_structures::thousands::usize_with_underscores;
14use rustc_feature::Features;
15use rustc_hir as hir;
16use rustc_hir::def_id::{CRATE_DEF_ID, CRATE_DEF_INDEX, LOCAL_CRATE, LocalDefId, LocalDefIdSet};
17use rustc_hir::definitions::DefPathData;
18use rustc_hir_pretty::id_to_string;
19use rustc_middle::dep_graph::WorkProductId;
20use rustc_middle::middle::dependency_format::Linkage;
21use rustc_middle::middle::exported_symbols::metadata_symbol_name;
22use rustc_middle::mir::interpret;
23use rustc_middle::query::Providers;
24use rustc_middle::traits::specialization_graph;
25use rustc_middle::ty::codec::TyEncoder;
26use rustc_middle::ty::fast_reject::{self, TreatParams};
27use rustc_middle::ty::{AssocItemContainer, SymbolName};
28use rustc_middle::{bug, span_bug};
29use rustc_serialize::{Decodable, Decoder, Encodable, Encoder, opaque};
30use rustc_session::config::{CrateType, OptLevel, TargetModifier};
31use rustc_span::hygiene::HygieneEncodeContext;
32use rustc_span::{
33 ByteSymbol, ExternalSource, FileName, SourceFile, SpanData, SpanEncoder, StableSourceFileId,
34 Symbol, SyntaxContext, sym,
35};
36use tracing::{debug, instrument, trace};
37
38use crate::errors::{FailCreateFileEncoder, FailWriteFile};
39use crate::rmeta::*;
40
41pub(super) struct EncodeContext<'a, 'tcx> {
42 opaque: opaque::FileEncoder,
43 tcx: TyCtxt<'tcx>,
44 feat: &'tcx rustc_feature::Features,
45 tables: TableBuilders,
46
47 lazy_state: LazyState,
48 span_shorthands: FxHashMap<Span, usize>,
49 type_shorthands: FxHashMap<Ty<'tcx>, usize>,
50 predicate_shorthands: FxHashMap<ty::PredicateKind<'tcx>, usize>,
51
52 interpret_allocs: FxIndexSet<interpret::AllocId>,
53
54 source_file_cache: (Arc<SourceFile>, usize),
58 required_source_files: Option<FxIndexSet<usize>>,
65 is_proc_macro: bool,
66 hygiene_ctxt: &'a HygieneEncodeContext,
67 symbol_index_table: FxHashMap<u32, usize>,
69}
70
71macro_rules! empty_proc_macro {
75 ($self:ident) => {
76 if $self.is_proc_macro {
77 return LazyArray::default();
78 }
79 };
80}
81
82macro_rules! encoder_methods {
83 ($($name:ident($ty:ty);)*) => {
84 $(fn $name(&mut self, value: $ty) {
85 self.opaque.$name(value)
86 })*
87 }
88}
89
90impl<'a, 'tcx> Encoder for EncodeContext<'a, 'tcx> {
91 encoder_methods! {
92 emit_usize(usize);
93 emit_u128(u128);
94 emit_u64(u64);
95 emit_u32(u32);
96 emit_u16(u16);
97 emit_u8(u8);
98
99 emit_isize(isize);
100 emit_i128(i128);
101 emit_i64(i64);
102 emit_i32(i32);
103 emit_i16(i16);
104
105 emit_raw_bytes(&[u8]);
106 }
107}
108
109impl<'a, 'tcx, T> Encodable<EncodeContext<'a, 'tcx>> for LazyValue<T> {
110 fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
111 e.emit_lazy_distance(self.position);
112 }
113}
114
115impl<'a, 'tcx, T> Encodable<EncodeContext<'a, 'tcx>> for LazyArray<T> {
116 fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
117 e.emit_usize(self.num_elems);
118 if self.num_elems > 0 {
119 e.emit_lazy_distance(self.position)
120 }
121 }
122}
123
124impl<'a, 'tcx, I, T> Encodable<EncodeContext<'a, 'tcx>> for LazyTable<I, T> {
125 fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
126 e.emit_usize(self.width);
127 e.emit_usize(self.len);
128 e.emit_lazy_distance(self.position);
129 }
130}
131
132impl<'a, 'tcx> Encodable<EncodeContext<'a, 'tcx>> for ExpnIndex {
133 fn encode(&self, s: &mut EncodeContext<'a, 'tcx>) {
134 s.emit_u32(self.as_u32());
135 }
136}
137
138impl<'a, 'tcx> SpanEncoder for EncodeContext<'a, 'tcx> {
139 fn encode_crate_num(&mut self, crate_num: CrateNum) {
140 if crate_num != LOCAL_CRATE && self.is_proc_macro {
141 panic!("Attempted to encode non-local CrateNum {crate_num:?} for proc-macro crate");
142 }
143 self.emit_u32(crate_num.as_u32());
144 }
145
146 fn encode_def_index(&mut self, def_index: DefIndex) {
147 self.emit_u32(def_index.as_u32());
148 }
149
150 fn encode_def_id(&mut self, def_id: DefId) {
151 def_id.krate.encode(self);
152 def_id.index.encode(self);
153 }
154
155 fn encode_syntax_context(&mut self, syntax_context: SyntaxContext) {
156 rustc_span::hygiene::raw_encode_syntax_context(syntax_context, self.hygiene_ctxt, self);
157 }
158
159 fn encode_expn_id(&mut self, expn_id: ExpnId) {
160 if expn_id.krate == LOCAL_CRATE {
161 self.hygiene_ctxt.schedule_expn_data_for_encoding(expn_id);
166 }
167 expn_id.krate.encode(self);
168 expn_id.local_id.encode(self);
169 }
170
171 fn encode_span(&mut self, span: Span) {
172 match self.span_shorthands.entry(span) {
173 Entry::Occupied(o) => {
174 let last_location = *o.get();
177 let offset = self.opaque.position() - last_location;
180 if offset < last_location {
181 let needed = bytes_needed(offset);
182 SpanTag::indirect(true, needed as u8).encode(self);
183 self.opaque.write_with(|dest| {
184 *dest = offset.to_le_bytes();
185 needed
186 });
187 } else {
188 let needed = bytes_needed(last_location);
189 SpanTag::indirect(false, needed as u8).encode(self);
190 self.opaque.write_with(|dest| {
191 *dest = last_location.to_le_bytes();
192 needed
193 });
194 }
195 }
196 Entry::Vacant(v) => {
197 let position = self.opaque.position();
198 v.insert(position);
199 span.data().encode(self);
201 }
202 }
203 }
204
205 fn encode_symbol(&mut self, sym: Symbol) {
206 self.encode_symbol_or_byte_symbol(sym.as_u32(), |this| this.emit_str(sym.as_str()));
207 }
208
209 fn encode_byte_symbol(&mut self, byte_sym: ByteSymbol) {
210 self.encode_symbol_or_byte_symbol(byte_sym.as_u32(), |this| {
211 this.emit_byte_str(byte_sym.as_byte_str())
212 });
213 }
214}
215
216fn bytes_needed(n: usize) -> usize {
217 (usize::BITS - n.leading_zeros()).div_ceil(u8::BITS) as usize
218}
219
220impl<'a, 'tcx> Encodable<EncodeContext<'a, 'tcx>> for SpanData {
221 fn encode(&self, s: &mut EncodeContext<'a, 'tcx>) {
222 let ctxt = if s.is_proc_macro { SyntaxContext::root() } else { self.ctxt };
254
255 if self.is_dummy() {
256 let tag = SpanTag::new(SpanKind::Partial, ctxt, 0);
257 tag.encode(s);
258 if tag.context().is_none() {
259 ctxt.encode(s);
260 }
261 return;
262 }
263
264 debug_assert!(self.lo <= self.hi);
266
267 if !s.source_file_cache.0.contains(self.lo) {
268 let source_map = s.tcx.sess.source_map();
269 let source_file_index = source_map.lookup_source_file_idx(self.lo);
270 s.source_file_cache =
271 (Arc::clone(&source_map.files()[source_file_index]), source_file_index);
272 }
273 let (ref source_file, source_file_index) = s.source_file_cache;
274 debug_assert!(source_file.contains(self.lo));
275
276 if !source_file.contains(self.hi) {
277 let tag = SpanTag::new(SpanKind::Partial, ctxt, 0);
280 tag.encode(s);
281 if tag.context().is_none() {
282 ctxt.encode(s);
283 }
284 return;
285 }
286
287 let (kind, metadata_index) = if source_file.is_imported() && !s.is_proc_macro {
304 let metadata_index = {
314 match &*source_file.external_src.read() {
316 ExternalSource::Foreign { metadata_index, .. } => *metadata_index,
317 src => panic!("Unexpected external source {src:?}"),
318 }
319 };
320
321 (SpanKind::Foreign, metadata_index)
322 } else {
323 let source_files =
325 s.required_source_files.as_mut().expect("Already encoded SourceMap!");
326 let (metadata_index, _) = source_files.insert_full(source_file_index);
327 let metadata_index: u32 =
328 metadata_index.try_into().expect("cannot export more than U32_MAX files");
329
330 (SpanKind::Local, metadata_index)
331 };
332
333 let lo = self.lo - source_file.start_pos;
336
337 let len = self.hi - self.lo;
340
341 let tag = SpanTag::new(kind, ctxt, len.0 as usize);
342 tag.encode(s);
343 if tag.context().is_none() {
344 ctxt.encode(s);
345 }
346 lo.encode(s);
347 if tag.length().is_none() {
348 len.encode(s);
349 }
350
351 metadata_index.encode(s);
353
354 if kind == SpanKind::Foreign {
355 let cnum = s.source_file_cache.0.cnum;
358 cnum.encode(s);
359 }
360 }
361}
362
363impl<'a, 'tcx> Encodable<EncodeContext<'a, 'tcx>> for [u8] {
364 fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
365 Encoder::emit_usize(e, self.len());
366 e.emit_raw_bytes(self);
367 }
368}
369
370impl<'a, 'tcx> TyEncoder<'tcx> for EncodeContext<'a, 'tcx> {
371 const CLEAR_CROSS_CRATE: bool = true;
372
373 fn position(&self) -> usize {
374 self.opaque.position()
375 }
376
377 fn type_shorthands(&mut self) -> &mut FxHashMap<Ty<'tcx>, usize> {
378 &mut self.type_shorthands
379 }
380
381 fn predicate_shorthands(&mut self) -> &mut FxHashMap<ty::PredicateKind<'tcx>, usize> {
382 &mut self.predicate_shorthands
383 }
384
385 fn encode_alloc_id(&mut self, alloc_id: &rustc_middle::mir::interpret::AllocId) {
386 let (index, _) = self.interpret_allocs.insert_full(*alloc_id);
387
388 index.encode(self);
389 }
390}
391
392macro_rules! record {
395 ($self:ident.$tables:ident.$table:ident[$def_id:expr] <- $value:expr) => {{
396 {
397 let value = $value;
398 let lazy = $self.lazy(value);
399 $self.$tables.$table.set_some($def_id.index, lazy);
400 }
401 }};
402}
403
404macro_rules! record_array {
407 ($self:ident.$tables:ident.$table:ident[$def_id:expr] <- $value:expr) => {{
408 {
409 let value = $value;
410 let lazy = $self.lazy_array(value);
411 $self.$tables.$table.set_some($def_id.index, lazy);
412 }
413 }};
414}
415
416macro_rules! record_defaulted_array {
417 ($self:ident.$tables:ident.$table:ident[$def_id:expr] <- $value:expr) => {{
418 {
419 let value = $value;
420 let lazy = $self.lazy_array(value);
421 $self.$tables.$table.set($def_id.index, lazy);
422 }
423 }};
424}
425
426impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
427 fn emit_lazy_distance(&mut self, position: NonZero<usize>) {
428 let pos = position.get();
429 let distance = match self.lazy_state {
430 LazyState::NoNode => bug!("emit_lazy_distance: outside of a metadata node"),
431 LazyState::NodeStart(start) => {
432 let start = start.get();
433 assert!(pos <= start);
434 start - pos
435 }
436 LazyState::Previous(last_pos) => {
437 assert!(
438 last_pos <= position,
439 "make sure that the calls to `lazy*` \
440 are in the same order as the metadata fields",
441 );
442 position.get() - last_pos.get()
443 }
444 };
445 self.lazy_state = LazyState::Previous(NonZero::new(pos).unwrap());
446 self.emit_usize(distance);
447 }
448
449 fn lazy<T: ParameterizedOverTcx, B: Borrow<T::Value<'tcx>>>(&mut self, value: B) -> LazyValue<T>
450 where
451 T::Value<'tcx>: Encodable<EncodeContext<'a, 'tcx>>,
452 {
453 let pos = NonZero::new(self.position()).unwrap();
454
455 assert_eq!(self.lazy_state, LazyState::NoNode);
456 self.lazy_state = LazyState::NodeStart(pos);
457 value.borrow().encode(self);
458 self.lazy_state = LazyState::NoNode;
459
460 assert!(pos.get() <= self.position());
461
462 LazyValue::from_position(pos)
463 }
464
465 fn lazy_array<T: ParameterizedOverTcx, I: IntoIterator<Item = B>, B: Borrow<T::Value<'tcx>>>(
466 &mut self,
467 values: I,
468 ) -> LazyArray<T>
469 where
470 T::Value<'tcx>: Encodable<EncodeContext<'a, 'tcx>>,
471 {
472 let pos = NonZero::new(self.position()).unwrap();
473
474 assert_eq!(self.lazy_state, LazyState::NoNode);
475 self.lazy_state = LazyState::NodeStart(pos);
476 let len = values.into_iter().map(|value| value.borrow().encode(self)).count();
477 self.lazy_state = LazyState::NoNode;
478
479 assert!(pos.get() <= self.position());
480
481 LazyArray::from_position_and_num_elems(pos, len)
482 }
483
484 fn encode_symbol_or_byte_symbol(
485 &mut self,
486 index: u32,
487 emit_str_or_byte_str: impl Fn(&mut Self),
488 ) {
489 if Symbol::is_predefined(index) {
491 self.opaque.emit_u8(SYMBOL_PREDEFINED);
492 self.opaque.emit_u32(index);
493 } else {
494 match self.symbol_index_table.entry(index) {
496 Entry::Vacant(o) => {
497 self.opaque.emit_u8(SYMBOL_STR);
498 let pos = self.opaque.position();
499 o.insert(pos);
500 emit_str_or_byte_str(self);
501 }
502 Entry::Occupied(o) => {
503 let x = *o.get();
504 self.emit_u8(SYMBOL_OFFSET);
505 self.emit_usize(x);
506 }
507 }
508 }
509 }
510
511 fn encode_def_path_table(&mut self) {
512 let table = self.tcx.def_path_table();
513 if self.is_proc_macro {
514 for def_index in std::iter::once(CRATE_DEF_INDEX)
515 .chain(self.tcx.resolutions(()).proc_macros.iter().map(|p| p.local_def_index))
516 {
517 let def_key = self.lazy(table.def_key(def_index));
518 let def_path_hash = table.def_path_hash(def_index);
519 self.tables.def_keys.set_some(def_index, def_key);
520 self.tables.def_path_hashes.set(def_index, def_path_hash.local_hash().as_u64());
521 }
522 } else {
523 for (def_index, def_key, def_path_hash) in table.enumerated_keys_and_path_hashes() {
524 let def_key = self.lazy(def_key);
525 self.tables.def_keys.set_some(def_index, def_key);
526 self.tables.def_path_hashes.set(def_index, def_path_hash.local_hash().as_u64());
527 }
528 }
529 }
530
531 fn encode_def_path_hash_map(&mut self) -> LazyValue<DefPathHashMapRef<'static>> {
532 self.lazy(DefPathHashMapRef::BorrowedFromTcx(self.tcx.def_path_hash_to_def_index_map()))
533 }
534
535 fn encode_source_map(&mut self) -> LazyTable<u32, Option<LazyValue<rustc_span::SourceFile>>> {
536 let source_map = self.tcx.sess.source_map();
537 let all_source_files = source_map.files();
538
539 let required_source_files = self.required_source_files.take().unwrap();
543
544 let working_directory = &self.tcx.sess.opts.working_dir;
545
546 let mut adapted = TableBuilder::default();
547
548 let local_crate_stable_id = self.tcx.stable_crate_id(LOCAL_CRATE);
549
550 for (on_disk_index, &source_file_index) in required_source_files.iter().enumerate() {
555 let source_file = &all_source_files[source_file_index];
556 assert!(!source_file.is_imported() || self.is_proc_macro);
558
559 let mut adapted_source_file = (**source_file).clone();
567
568 match source_file.name {
569 FileName::Real(ref original_file_name) => {
570 let adapted_file_name = source_map
571 .path_mapping()
572 .to_embeddable_absolute_path(original_file_name.clone(), working_directory);
573
574 adapted_source_file.name = FileName::Real(adapted_file_name);
575 }
576 _ => {
577 }
579 };
580
581 if self.is_proc_macro {
588 adapted_source_file.cnum = LOCAL_CRATE;
589 }
590
591 adapted_source_file.stable_id = StableSourceFileId::from_filename_for_export(
595 &adapted_source_file.name,
596 local_crate_stable_id,
597 );
598
599 let on_disk_index: u32 =
600 on_disk_index.try_into().expect("cannot export more than U32_MAX files");
601 adapted.set_some(on_disk_index, self.lazy(adapted_source_file));
602 }
603
604 adapted.encode(&mut self.opaque)
605 }
606
607 fn encode_crate_root(&mut self) -> LazyValue<CrateRoot> {
608 let tcx = self.tcx;
609 let mut stats: Vec<(&'static str, usize)> = Vec::with_capacity(32);
610
611 macro_rules! stat {
612 ($label:literal, $f:expr) => {{
613 let orig_pos = self.position();
614 let res = $f();
615 stats.push(($label, self.position() - orig_pos));
616 res
617 }};
618 }
619
620 stats.push(("preamble", self.position()));
622
623 let (crate_deps, dylib_dependency_formats) =
624 stat!("dep", || (self.encode_crate_deps(), self.encode_dylib_dependency_formats()));
625
626 let lib_features = stat!("lib-features", || self.encode_lib_features());
627
628 let stability_implications =
629 stat!("stability-implications", || self.encode_stability_implications());
630
631 let (lang_items, lang_items_missing) = stat!("lang-items", || {
632 (self.encode_lang_items(), self.encode_lang_items_missing())
633 });
634
635 let stripped_cfg_items = stat!("stripped-cfg-items", || self.encode_stripped_cfg_items());
636
637 let diagnostic_items = stat!("diagnostic-items", || self.encode_diagnostic_items());
638
639 let native_libraries = stat!("native-libs", || self.encode_native_libraries());
640
641 let foreign_modules = stat!("foreign-modules", || self.encode_foreign_modules());
642
643 _ = stat!("def-path-table", || self.encode_def_path_table());
644
645 let traits = stat!("traits", || self.encode_traits());
647
648 let impls = stat!("impls", || self.encode_impls());
650
651 let incoherent_impls = stat!("incoherent-impls", || self.encode_incoherent_impls());
652
653 _ = stat!("mir", || self.encode_mir());
654
655 _ = stat!("def-ids", || self.encode_def_ids());
656
657 let interpret_alloc_index = stat!("interpret-alloc-index", || {
658 let mut interpret_alloc_index = Vec::new();
659 let mut n = 0;
660 trace!("beginning to encode alloc ids");
661 loop {
662 let new_n = self.interpret_allocs.len();
663 if n == new_n {
665 break;
667 }
668 trace!("encoding {} further alloc ids", new_n - n);
669 for idx in n..new_n {
670 let id = self.interpret_allocs[idx];
671 let pos = self.position() as u64;
672 interpret_alloc_index.push(pos);
673 interpret::specialized_encode_alloc_id(self, tcx, id);
674 }
675 n = new_n;
676 }
677 self.lazy_array(interpret_alloc_index)
678 });
679
680 let proc_macro_data = stat!("proc-macro-data", || self.encode_proc_macros());
684
685 let tables = stat!("tables", || self.tables.encode(&mut self.opaque));
686
687 let debugger_visualizers =
688 stat!("debugger-visualizers", || self.encode_debugger_visualizers());
689
690 let exportable_items = stat!("exportable-items", || self.encode_exportable_items());
691
692 let stable_order_of_exportable_impls =
693 stat!("exportable-items", || self.encode_stable_order_of_exportable_impls());
694
695 let (exported_non_generic_symbols, exported_generic_symbols) =
697 stat!("exported-symbols", || {
698 (
699 self.encode_exported_symbols(tcx.exported_non_generic_symbols(LOCAL_CRATE)),
700 self.encode_exported_symbols(tcx.exported_generic_symbols(LOCAL_CRATE)),
701 )
702 });
703
704 let (syntax_contexts, expn_data, expn_hashes) = stat!("hygiene", || self.encode_hygiene());
711
712 let def_path_hash_map = stat!("def-path-hash-map", || self.encode_def_path_hash_map());
713
714 let source_map = stat!("source-map", || self.encode_source_map());
717 let target_modifiers = stat!("target-modifiers", || self.encode_target_modifiers());
718
719 let root = stat!("final", || {
720 let attrs = tcx.hir_krate_attrs();
721 self.lazy(CrateRoot {
722 header: CrateHeader {
723 name: tcx.crate_name(LOCAL_CRATE),
724 triple: tcx.sess.opts.target_triple.clone(),
725 hash: tcx.crate_hash(LOCAL_CRATE),
726 is_proc_macro_crate: proc_macro_data.is_some(),
727 is_stub: false,
728 },
729 extra_filename: tcx.sess.opts.cg.extra_filename.clone(),
730 stable_crate_id: tcx.def_path_hash(LOCAL_CRATE.as_def_id()).stable_crate_id(),
731 required_panic_strategy: tcx.required_panic_strategy(LOCAL_CRATE),
732 panic_in_drop_strategy: tcx.sess.opts.unstable_opts.panic_in_drop,
733 edition: tcx.sess.edition(),
734 has_global_allocator: tcx.has_global_allocator(LOCAL_CRATE),
735 has_alloc_error_handler: tcx.has_alloc_error_handler(LOCAL_CRATE),
736 has_panic_handler: tcx.has_panic_handler(LOCAL_CRATE),
737 has_default_lib_allocator: ast::attr::contains_name(
738 attrs,
739 sym::default_lib_allocator,
740 ),
741 proc_macro_data,
742 debugger_visualizers,
743 compiler_builtins: ast::attr::contains_name(attrs, sym::compiler_builtins),
744 needs_allocator: ast::attr::contains_name(attrs, sym::needs_allocator),
745 needs_panic_runtime: ast::attr::contains_name(attrs, sym::needs_panic_runtime),
746 no_builtins: ast::attr::contains_name(attrs, sym::no_builtins),
747 panic_runtime: ast::attr::contains_name(attrs, sym::panic_runtime),
748 profiler_runtime: ast::attr::contains_name(attrs, sym::profiler_runtime),
749 symbol_mangling_version: tcx.sess.opts.get_symbol_mangling_version(),
750
751 crate_deps,
752 dylib_dependency_formats,
753 lib_features,
754 stability_implications,
755 lang_items,
756 diagnostic_items,
757 lang_items_missing,
758 stripped_cfg_items,
759 native_libraries,
760 foreign_modules,
761 source_map,
762 target_modifiers,
763 traits,
764 impls,
765 incoherent_impls,
766 exportable_items,
767 stable_order_of_exportable_impls,
768 exported_non_generic_symbols,
769 exported_generic_symbols,
770 interpret_alloc_index,
771 tables,
772 syntax_contexts,
773 expn_data,
774 expn_hashes,
775 def_path_hash_map,
776 specialization_enabled_in: tcx.specialization_enabled_in(LOCAL_CRATE),
777 })
778 });
779
780 let total_bytes = self.position();
781
782 let computed_total_bytes: usize = stats.iter().map(|(_, size)| size).sum();
783 assert_eq!(total_bytes, computed_total_bytes);
784
785 if tcx.sess.opts.unstable_opts.meta_stats {
786 use std::fmt::Write;
787
788 self.opaque.flush();
789
790 let pos_before_rewind = self.opaque.file().stream_position().unwrap();
792 let mut zero_bytes = 0;
793 self.opaque.file().rewind().unwrap();
794 let file = std::io::BufReader::new(self.opaque.file());
795 for e in file.bytes() {
796 if e.unwrap() == 0 {
797 zero_bytes += 1;
798 }
799 }
800 assert_eq!(self.opaque.file().stream_position().unwrap(), pos_before_rewind);
801
802 stats.sort_by_key(|&(_, usize)| usize);
803 stats.reverse(); let prefix = "meta-stats";
806 let perc = |bytes| (bytes * 100) as f64 / total_bytes as f64;
807
808 let section_w = 23;
809 let size_w = 10;
810 let banner_w = 64;
811
812 let mut s = String::new();
818 _ = writeln!(s, "{prefix} {}", "=".repeat(banner_w));
819 _ = writeln!(s, "{prefix} METADATA STATS: {}", tcx.crate_name(LOCAL_CRATE));
820 _ = writeln!(s, "{prefix} {:<section_w$}{:>size_w$}", "Section", "Size");
821 _ = writeln!(s, "{prefix} {}", "-".repeat(banner_w));
822 for (label, size) in stats {
823 _ = writeln!(
824 s,
825 "{prefix} {:<section_w$}{:>size_w$} ({:4.1}%)",
826 label,
827 usize_with_underscores(size),
828 perc(size)
829 );
830 }
831 _ = writeln!(s, "{prefix} {}", "-".repeat(banner_w));
832 _ = writeln!(
833 s,
834 "{prefix} {:<section_w$}{:>size_w$} (of which {:.1}% are zero bytes)",
835 "Total",
836 usize_with_underscores(total_bytes),
837 perc(zero_bytes)
838 );
839 _ = writeln!(s, "{prefix} {}", "=".repeat(banner_w));
840 eprint!("{s}");
841 }
842
843 root
844 }
845}
846
847struct AnalyzeAttrState<'a> {
848 is_exported: bool,
849 is_doc_hidden: bool,
850 features: &'a Features,
851}
852
853#[inline]
863fn analyze_attr(attr: &hir::Attribute, state: &mut AnalyzeAttrState<'_>) -> bool {
864 let mut should_encode = false;
865 if let hir::Attribute::Parsed(p) = attr
866 && p.encode_cross_crate() == EncodeCrossCrate::No
867 {
868 } else if let Some(name) = attr.name()
870 && !rustc_feature::encode_cross_crate(name)
871 {
872 } else if attr.doc_str().is_some() {
874 if state.is_exported {
878 should_encode = true;
879 }
880 } else if attr.has_name(sym::doc) {
881 if let Some(item_list) = attr.meta_item_list() {
884 for item in item_list {
885 if !item.has_name(sym::inline) {
886 should_encode = true;
887 if item.has_name(sym::hidden) {
888 state.is_doc_hidden = true;
889 break;
890 }
891 }
892 }
893 }
894 } else if let &[sym::diagnostic, seg] = &*attr.path() {
895 should_encode = rustc_feature::is_stable_diagnostic_attribute(seg, state.features);
896 } else {
897 should_encode = true;
898 }
899 should_encode
900}
901
902fn should_encode_span(def_kind: DefKind) -> bool {
903 match def_kind {
904 DefKind::Mod
905 | DefKind::Struct
906 | DefKind::Union
907 | DefKind::Enum
908 | DefKind::Variant
909 | DefKind::Trait
910 | DefKind::TyAlias
911 | DefKind::ForeignTy
912 | DefKind::TraitAlias
913 | DefKind::AssocTy
914 | DefKind::TyParam
915 | DefKind::ConstParam
916 | DefKind::LifetimeParam
917 | DefKind::Fn
918 | DefKind::Const
919 | DefKind::Static { .. }
920 | DefKind::Ctor(..)
921 | DefKind::AssocFn
922 | DefKind::AssocConst
923 | DefKind::Macro(_)
924 | DefKind::ExternCrate
925 | DefKind::Use
926 | DefKind::AnonConst
927 | DefKind::InlineConst
928 | DefKind::OpaqueTy
929 | DefKind::Field
930 | DefKind::Impl { .. }
931 | DefKind::Closure
932 | DefKind::SyntheticCoroutineBody => true,
933 DefKind::ForeignMod | DefKind::GlobalAsm => false,
934 }
935}
936
937fn should_encode_attrs(def_kind: DefKind) -> bool {
938 match def_kind {
939 DefKind::Mod
940 | DefKind::Struct
941 | DefKind::Union
942 | DefKind::Enum
943 | DefKind::Variant
944 | DefKind::Trait
945 | DefKind::TyAlias
946 | DefKind::ForeignTy
947 | DefKind::TraitAlias
948 | DefKind::AssocTy
949 | DefKind::Fn
950 | DefKind::Const
951 | DefKind::Static { nested: false, .. }
952 | DefKind::AssocFn
953 | DefKind::AssocConst
954 | DefKind::Macro(_)
955 | DefKind::Field
956 | DefKind::Impl { .. } => true,
957 DefKind::Closure => true,
962 DefKind::SyntheticCoroutineBody => false,
963 DefKind::TyParam
964 | DefKind::ConstParam
965 | DefKind::Ctor(..)
966 | DefKind::ExternCrate
967 | DefKind::Use
968 | DefKind::ForeignMod
969 | DefKind::AnonConst
970 | DefKind::InlineConst
971 | DefKind::OpaqueTy
972 | DefKind::LifetimeParam
973 | DefKind::Static { nested: true, .. }
974 | DefKind::GlobalAsm => false,
975 }
976}
977
978fn should_encode_expn_that_defined(def_kind: DefKind) -> bool {
979 match def_kind {
980 DefKind::Mod
981 | DefKind::Struct
982 | DefKind::Union
983 | DefKind::Enum
984 | DefKind::Variant
985 | DefKind::Trait
986 | DefKind::Impl { .. } => true,
987 DefKind::TyAlias
988 | DefKind::ForeignTy
989 | DefKind::TraitAlias
990 | DefKind::AssocTy
991 | DefKind::TyParam
992 | DefKind::Fn
993 | DefKind::Const
994 | DefKind::ConstParam
995 | DefKind::Static { .. }
996 | DefKind::Ctor(..)
997 | DefKind::AssocFn
998 | DefKind::AssocConst
999 | DefKind::Macro(_)
1000 | DefKind::ExternCrate
1001 | DefKind::Use
1002 | DefKind::ForeignMod
1003 | DefKind::AnonConst
1004 | DefKind::InlineConst
1005 | DefKind::OpaqueTy
1006 | DefKind::Field
1007 | DefKind::LifetimeParam
1008 | DefKind::GlobalAsm
1009 | DefKind::Closure
1010 | DefKind::SyntheticCoroutineBody => false,
1011 }
1012}
1013
1014fn should_encode_visibility(def_kind: DefKind) -> bool {
1015 match def_kind {
1016 DefKind::Mod
1017 | DefKind::Struct
1018 | DefKind::Union
1019 | DefKind::Enum
1020 | DefKind::Variant
1021 | DefKind::Trait
1022 | DefKind::TyAlias
1023 | DefKind::ForeignTy
1024 | DefKind::TraitAlias
1025 | DefKind::AssocTy
1026 | DefKind::Fn
1027 | DefKind::Const
1028 | DefKind::Static { nested: false, .. }
1029 | DefKind::Ctor(..)
1030 | DefKind::AssocFn
1031 | DefKind::AssocConst
1032 | DefKind::Macro(..)
1033 | DefKind::Field => true,
1034 DefKind::Use
1035 | DefKind::ForeignMod
1036 | DefKind::TyParam
1037 | DefKind::ConstParam
1038 | DefKind::LifetimeParam
1039 | DefKind::AnonConst
1040 | DefKind::InlineConst
1041 | DefKind::Static { nested: true, .. }
1042 | DefKind::OpaqueTy
1043 | DefKind::GlobalAsm
1044 | DefKind::Impl { .. }
1045 | DefKind::Closure
1046 | DefKind::ExternCrate
1047 | DefKind::SyntheticCoroutineBody => false,
1048 }
1049}
1050
1051fn should_encode_stability(def_kind: DefKind) -> bool {
1052 match def_kind {
1053 DefKind::Mod
1054 | DefKind::Ctor(..)
1055 | DefKind::Variant
1056 | DefKind::Field
1057 | DefKind::Struct
1058 | DefKind::AssocTy
1059 | DefKind::AssocFn
1060 | DefKind::AssocConst
1061 | DefKind::TyParam
1062 | DefKind::ConstParam
1063 | DefKind::Static { .. }
1064 | DefKind::Const
1065 | DefKind::Fn
1066 | DefKind::ForeignMod
1067 | DefKind::TyAlias
1068 | DefKind::OpaqueTy
1069 | DefKind::Enum
1070 | DefKind::Union
1071 | DefKind::Impl { .. }
1072 | DefKind::Trait
1073 | DefKind::TraitAlias
1074 | DefKind::Macro(..)
1075 | DefKind::ForeignTy => true,
1076 DefKind::Use
1077 | DefKind::LifetimeParam
1078 | DefKind::AnonConst
1079 | DefKind::InlineConst
1080 | DefKind::GlobalAsm
1081 | DefKind::Closure
1082 | DefKind::ExternCrate
1083 | DefKind::SyntheticCoroutineBody => false,
1084 }
1085}
1086
1087fn should_encode_mir(
1108 tcx: TyCtxt<'_>,
1109 reachable_set: &LocalDefIdSet,
1110 def_id: LocalDefId,
1111) -> (bool, bool) {
1112 match tcx.def_kind(def_id) {
1113 DefKind::Ctor(_, _) => {
1115 let mir_opt_base = tcx.sess.opts.output_types.should_codegen()
1116 || tcx.sess.opts.unstable_opts.always_encode_mir;
1117 (true, mir_opt_base)
1118 }
1119 DefKind::AnonConst | DefKind::InlineConst | DefKind::AssocConst | DefKind::Const => {
1121 (true, false)
1122 }
1123 DefKind::Closure if tcx.is_coroutine(def_id.to_def_id()) => (false, true),
1125 DefKind::SyntheticCoroutineBody => (false, true),
1126 DefKind::AssocFn | DefKind::Fn | DefKind::Closure => {
1128 let generics = tcx.generics_of(def_id);
1129 let opt = tcx.sess.opts.unstable_opts.always_encode_mir
1130 || (tcx.sess.opts.output_types.should_codegen()
1131 && reachable_set.contains(&def_id)
1132 && (generics.requires_monomorphization(tcx)
1133 || tcx.cross_crate_inlinable(def_id)));
1134 let is_const_fn = tcx.is_const_fn(def_id.to_def_id())
1136 || tcx.is_const_default_method(def_id.to_def_id());
1137 (is_const_fn, opt)
1138 }
1139 _ => (false, false),
1141 }
1142}
1143
1144fn should_encode_variances<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId, def_kind: DefKind) -> bool {
1145 match def_kind {
1146 DefKind::Struct
1147 | DefKind::Union
1148 | DefKind::Enum
1149 | DefKind::OpaqueTy
1150 | DefKind::Fn
1151 | DefKind::Ctor(..)
1152 | DefKind::AssocFn => true,
1153 DefKind::AssocTy => {
1154 matches!(tcx.opt_rpitit_info(def_id), Some(ty::ImplTraitInTraitData::Trait { .. }))
1156 }
1157 DefKind::Mod
1158 | DefKind::Variant
1159 | DefKind::Field
1160 | DefKind::AssocConst
1161 | DefKind::TyParam
1162 | DefKind::ConstParam
1163 | DefKind::Static { .. }
1164 | DefKind::Const
1165 | DefKind::ForeignMod
1166 | DefKind::Impl { .. }
1167 | DefKind::Trait
1168 | DefKind::TraitAlias
1169 | DefKind::Macro(..)
1170 | DefKind::ForeignTy
1171 | DefKind::Use
1172 | DefKind::LifetimeParam
1173 | DefKind::AnonConst
1174 | DefKind::InlineConst
1175 | DefKind::GlobalAsm
1176 | DefKind::Closure
1177 | DefKind::ExternCrate
1178 | DefKind::SyntheticCoroutineBody => false,
1179 DefKind::TyAlias => tcx.type_alias_is_lazy(def_id),
1180 }
1181}
1182
1183fn should_encode_generics(def_kind: DefKind) -> bool {
1184 match def_kind {
1185 DefKind::Struct
1186 | DefKind::Union
1187 | DefKind::Enum
1188 | DefKind::Variant
1189 | DefKind::Trait
1190 | DefKind::TyAlias
1191 | DefKind::ForeignTy
1192 | DefKind::TraitAlias
1193 | DefKind::AssocTy
1194 | DefKind::Fn
1195 | DefKind::Const
1196 | DefKind::Static { .. }
1197 | DefKind::Ctor(..)
1198 | DefKind::AssocFn
1199 | DefKind::AssocConst
1200 | DefKind::AnonConst
1201 | DefKind::InlineConst
1202 | DefKind::OpaqueTy
1203 | DefKind::Impl { .. }
1204 | DefKind::Field
1205 | DefKind::TyParam
1206 | DefKind::Closure
1207 | DefKind::SyntheticCoroutineBody => true,
1208 DefKind::Mod
1209 | DefKind::ForeignMod
1210 | DefKind::ConstParam
1211 | DefKind::Macro(..)
1212 | DefKind::Use
1213 | DefKind::LifetimeParam
1214 | DefKind::GlobalAsm
1215 | DefKind::ExternCrate => false,
1216 }
1217}
1218
1219fn should_encode_type(tcx: TyCtxt<'_>, def_id: LocalDefId, def_kind: DefKind) -> bool {
1220 match def_kind {
1221 DefKind::Struct
1222 | DefKind::Union
1223 | DefKind::Enum
1224 | DefKind::Variant
1225 | DefKind::Ctor(..)
1226 | DefKind::Field
1227 | DefKind::Fn
1228 | DefKind::Const
1229 | DefKind::Static { nested: false, .. }
1230 | DefKind::TyAlias
1231 | DefKind::ForeignTy
1232 | DefKind::Impl { .. }
1233 | DefKind::AssocFn
1234 | DefKind::AssocConst
1235 | DefKind::Closure
1236 | DefKind::ConstParam
1237 | DefKind::AnonConst
1238 | DefKind::InlineConst
1239 | DefKind::SyntheticCoroutineBody => true,
1240
1241 DefKind::OpaqueTy => {
1242 let origin = tcx.local_opaque_ty_origin(def_id);
1243 if let hir::OpaqueTyOrigin::FnReturn { parent, .. }
1244 | hir::OpaqueTyOrigin::AsyncFn { parent, .. } = origin
1245 && let hir::Node::TraitItem(trait_item) = tcx.hir_node_by_def_id(parent)
1246 && let (_, hir::TraitFn::Required(..)) = trait_item.expect_fn()
1247 {
1248 false
1249 } else {
1250 true
1251 }
1252 }
1253
1254 DefKind::AssocTy => {
1255 let assoc_item = tcx.associated_item(def_id);
1256 match assoc_item.container {
1257 ty::AssocItemContainer::Impl => true,
1258 ty::AssocItemContainer::Trait => assoc_item.defaultness(tcx).has_value(),
1259 }
1260 }
1261 DefKind::TyParam => {
1262 let hir::Node::GenericParam(param) = tcx.hir_node_by_def_id(def_id) else { bug!() };
1263 let hir::GenericParamKind::Type { default, .. } = param.kind else { bug!() };
1264 default.is_some()
1265 }
1266
1267 DefKind::Trait
1268 | DefKind::TraitAlias
1269 | DefKind::Mod
1270 | DefKind::ForeignMod
1271 | DefKind::Macro(..)
1272 | DefKind::Static { nested: true, .. }
1273 | DefKind::Use
1274 | DefKind::LifetimeParam
1275 | DefKind::GlobalAsm
1276 | DefKind::ExternCrate => false,
1277 }
1278}
1279
1280fn should_encode_fn_sig(def_kind: DefKind) -> bool {
1281 match def_kind {
1282 DefKind::Fn | DefKind::AssocFn | DefKind::Ctor(_, CtorKind::Fn) => true,
1283
1284 DefKind::Struct
1285 | DefKind::Union
1286 | DefKind::Enum
1287 | DefKind::Variant
1288 | DefKind::Field
1289 | DefKind::Const
1290 | DefKind::Static { .. }
1291 | DefKind::Ctor(..)
1292 | DefKind::TyAlias
1293 | DefKind::OpaqueTy
1294 | DefKind::ForeignTy
1295 | DefKind::Impl { .. }
1296 | DefKind::AssocConst
1297 | DefKind::Closure
1298 | DefKind::ConstParam
1299 | DefKind::AnonConst
1300 | DefKind::InlineConst
1301 | DefKind::AssocTy
1302 | DefKind::TyParam
1303 | DefKind::Trait
1304 | DefKind::TraitAlias
1305 | DefKind::Mod
1306 | DefKind::ForeignMod
1307 | DefKind::Macro(..)
1308 | DefKind::Use
1309 | DefKind::LifetimeParam
1310 | DefKind::GlobalAsm
1311 | DefKind::ExternCrate
1312 | DefKind::SyntheticCoroutineBody => false,
1313 }
1314}
1315
1316fn should_encode_constness(def_kind: DefKind) -> bool {
1317 match def_kind {
1318 DefKind::Fn | DefKind::AssocFn | DefKind::Closure | DefKind::Ctor(_, CtorKind::Fn) => true,
1319
1320 DefKind::Struct
1321 | DefKind::Union
1322 | DefKind::Enum
1323 | DefKind::Field
1324 | DefKind::Const
1325 | DefKind::AssocConst
1326 | DefKind::AnonConst
1327 | DefKind::Static { .. }
1328 | DefKind::TyAlias
1329 | DefKind::OpaqueTy
1330 | DefKind::Impl { .. }
1331 | DefKind::ForeignTy
1332 | DefKind::ConstParam
1333 | DefKind::InlineConst
1334 | DefKind::AssocTy
1335 | DefKind::TyParam
1336 | DefKind::Trait
1337 | DefKind::TraitAlias
1338 | DefKind::Mod
1339 | DefKind::ForeignMod
1340 | DefKind::Macro(..)
1341 | DefKind::Use
1342 | DefKind::LifetimeParam
1343 | DefKind::GlobalAsm
1344 | DefKind::ExternCrate
1345 | DefKind::Ctor(_, CtorKind::Const)
1346 | DefKind::Variant
1347 | DefKind::SyntheticCoroutineBody => false,
1348 }
1349}
1350
1351fn should_encode_const(def_kind: DefKind) -> bool {
1352 match def_kind {
1353 DefKind::Const | DefKind::AssocConst | DefKind::AnonConst | DefKind::InlineConst => true,
1354
1355 DefKind::Struct
1356 | DefKind::Union
1357 | DefKind::Enum
1358 | DefKind::Variant
1359 | DefKind::Ctor(..)
1360 | DefKind::Field
1361 | DefKind::Fn
1362 | DefKind::Static { .. }
1363 | DefKind::TyAlias
1364 | DefKind::OpaqueTy
1365 | DefKind::ForeignTy
1366 | DefKind::Impl { .. }
1367 | DefKind::AssocFn
1368 | DefKind::Closure
1369 | DefKind::ConstParam
1370 | DefKind::AssocTy
1371 | DefKind::TyParam
1372 | DefKind::Trait
1373 | DefKind::TraitAlias
1374 | DefKind::Mod
1375 | DefKind::ForeignMod
1376 | DefKind::Macro(..)
1377 | DefKind::Use
1378 | DefKind::LifetimeParam
1379 | DefKind::GlobalAsm
1380 | DefKind::ExternCrate
1381 | DefKind::SyntheticCoroutineBody => false,
1382 }
1383}
1384
1385fn should_encode_fn_impl_trait_in_trait<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> bool {
1386 if let Some(assoc_item) = tcx.opt_associated_item(def_id)
1387 && assoc_item.container == ty::AssocItemContainer::Trait
1388 && assoc_item.is_fn()
1389 {
1390 true
1391 } else {
1392 false
1393 }
1394}
1395
1396impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
1397 fn encode_attrs(&mut self, def_id: LocalDefId) {
1398 let tcx = self.tcx;
1399 let mut state = AnalyzeAttrState {
1400 is_exported: tcx.effective_visibilities(()).is_exported(def_id),
1401 is_doc_hidden: false,
1402 features: &tcx.features(),
1403 };
1404 let attr_iter = tcx
1405 .hir_attrs(tcx.local_def_id_to_hir_id(def_id))
1406 .iter()
1407 .filter(|attr| analyze_attr(*attr, &mut state));
1408
1409 record_array!(self.tables.attributes[def_id.to_def_id()] <- attr_iter);
1410
1411 let mut attr_flags = AttrFlags::empty();
1412 if state.is_doc_hidden {
1413 attr_flags |= AttrFlags::IS_DOC_HIDDEN;
1414 }
1415 self.tables.attr_flags.set(def_id.local_def_index, attr_flags);
1416 }
1417
1418 fn encode_def_ids(&mut self) {
1419 self.encode_info_for_mod(CRATE_DEF_ID);
1420
1421 if self.is_proc_macro {
1424 return;
1425 }
1426
1427 let tcx = self.tcx;
1428
1429 for local_id in tcx.iter_local_def_id() {
1430 let def_id = local_id.to_def_id();
1431 let def_kind = tcx.def_kind(local_id);
1432 self.tables.def_kind.set_some(def_id.index, def_kind);
1433
1434 if def_kind == DefKind::AnonConst
1439 && match tcx.hir_node_by_def_id(local_id) {
1440 hir::Node::ConstArg(hir::ConstArg { kind, .. }) => match kind {
1441 hir::ConstArgKind::Path(..) | hir::ConstArgKind::Infer(..) => true,
1443 hir::ConstArgKind::Anon(..) => false,
1444 },
1445 _ => false,
1446 }
1447 {
1448 continue;
1449 }
1450
1451 if def_kind == DefKind::Field
1452 && let hir::Node::Field(field) = tcx.hir_node_by_def_id(local_id)
1453 && let Some(anon) = field.default
1454 {
1455 record!(self.tables.default_fields[def_id] <- anon.def_id.to_def_id());
1456 }
1457
1458 if should_encode_span(def_kind) {
1459 let def_span = tcx.def_span(local_id);
1460 record!(self.tables.def_span[def_id] <- def_span);
1461 }
1462 if should_encode_attrs(def_kind) {
1463 self.encode_attrs(local_id);
1464 }
1465 if should_encode_expn_that_defined(def_kind) {
1466 record!(self.tables.expn_that_defined[def_id] <- self.tcx.expn_that_defined(def_id));
1467 }
1468 if should_encode_span(def_kind)
1469 && let Some(ident_span) = tcx.def_ident_span(def_id)
1470 {
1471 record!(self.tables.def_ident_span[def_id] <- ident_span);
1472 }
1473 if def_kind.has_codegen_attrs() {
1474 record!(self.tables.codegen_fn_attrs[def_id] <- self.tcx.codegen_fn_attrs(def_id));
1475 }
1476 if should_encode_visibility(def_kind) {
1477 let vis =
1478 self.tcx.local_visibility(local_id).map_id(|def_id| def_id.local_def_index);
1479 record!(self.tables.visibility[def_id] <- vis);
1480 }
1481 if should_encode_stability(def_kind) {
1482 self.encode_stability(def_id);
1483 self.encode_const_stability(def_id);
1484 self.encode_default_body_stability(def_id);
1485 self.encode_deprecation(def_id);
1486 }
1487 if should_encode_variances(tcx, def_id, def_kind) {
1488 let v = self.tcx.variances_of(def_id);
1489 record_array!(self.tables.variances_of[def_id] <- v);
1490 }
1491 if should_encode_fn_sig(def_kind) {
1492 record!(self.tables.fn_sig[def_id] <- tcx.fn_sig(def_id));
1493 }
1494 if should_encode_generics(def_kind) {
1495 let g = tcx.generics_of(def_id);
1496 record!(self.tables.generics_of[def_id] <- g);
1497 record!(self.tables.explicit_predicates_of[def_id] <- self.tcx.explicit_predicates_of(def_id));
1498 let inferred_outlives = self.tcx.inferred_outlives_of(def_id);
1499 record_defaulted_array!(self.tables.inferred_outlives_of[def_id] <- inferred_outlives);
1500
1501 for param in &g.own_params {
1502 if let ty::GenericParamDefKind::Const { has_default: true, .. } = param.kind {
1503 let default = self.tcx.const_param_default(param.def_id);
1504 record!(self.tables.const_param_default[param.def_id] <- default);
1505 }
1506 }
1507 }
1508 if tcx.is_conditionally_const(def_id) {
1509 record!(self.tables.const_conditions[def_id] <- self.tcx.const_conditions(def_id));
1510 }
1511 if should_encode_type(tcx, local_id, def_kind) {
1512 record!(self.tables.type_of[def_id] <- self.tcx.type_of(def_id));
1513 }
1514 if should_encode_constness(def_kind) {
1515 self.tables.constness.set_some(def_id.index, self.tcx.constness(def_id));
1516 }
1517 if let DefKind::Fn | DefKind::AssocFn = def_kind {
1518 self.tables.asyncness.set_some(def_id.index, tcx.asyncness(def_id));
1519 record_array!(self.tables.fn_arg_idents[def_id] <- tcx.fn_arg_idents(def_id));
1520 }
1521 if let Some(name) = tcx.intrinsic(def_id) {
1522 record!(self.tables.intrinsic[def_id] <- name);
1523 }
1524 if let DefKind::TyParam = def_kind {
1525 let default = self.tcx.object_lifetime_default(def_id);
1526 record!(self.tables.object_lifetime_default[def_id] <- default);
1527 }
1528 if let DefKind::Trait = def_kind {
1529 record!(self.tables.trait_def[def_id] <- self.tcx.trait_def(def_id));
1530 record_defaulted_array!(self.tables.explicit_super_predicates_of[def_id] <-
1531 self.tcx.explicit_super_predicates_of(def_id).skip_binder());
1532 record_defaulted_array!(self.tables.explicit_implied_predicates_of[def_id] <-
1533 self.tcx.explicit_implied_predicates_of(def_id).skip_binder());
1534 let module_children = self.tcx.module_children_local(local_id);
1535 record_array!(self.tables.module_children_non_reexports[def_id] <-
1536 module_children.iter().map(|child| child.res.def_id().index));
1537 if self.tcx.is_const_trait(def_id) {
1538 record_defaulted_array!(self.tables.explicit_implied_const_bounds[def_id]
1539 <- self.tcx.explicit_implied_const_bounds(def_id).skip_binder());
1540 }
1541 }
1542 if let DefKind::TraitAlias = def_kind {
1543 record!(self.tables.trait_def[def_id] <- self.tcx.trait_def(def_id));
1544 record_defaulted_array!(self.tables.explicit_super_predicates_of[def_id] <-
1545 self.tcx.explicit_super_predicates_of(def_id).skip_binder());
1546 record_defaulted_array!(self.tables.explicit_implied_predicates_of[def_id] <-
1547 self.tcx.explicit_implied_predicates_of(def_id).skip_binder());
1548 }
1549 if let DefKind::Trait | DefKind::Impl { .. } = def_kind {
1550 let associated_item_def_ids = self.tcx.associated_item_def_ids(def_id);
1551 record_array!(self.tables.associated_item_or_field_def_ids[def_id] <-
1552 associated_item_def_ids.iter().map(|&def_id| {
1553 assert!(def_id.is_local());
1554 def_id.index
1555 })
1556 );
1557 for &def_id in associated_item_def_ids {
1558 self.encode_info_for_assoc_item(def_id);
1559 }
1560 }
1561 if let DefKind::Closure | DefKind::SyntheticCoroutineBody = def_kind
1562 && let Some(coroutine_kind) = self.tcx.coroutine_kind(def_id)
1563 {
1564 self.tables.coroutine_kind.set(def_id.index, Some(coroutine_kind))
1565 }
1566 if def_kind == DefKind::Closure
1567 && tcx.type_of(def_id).skip_binder().is_coroutine_closure()
1568 {
1569 let coroutine_for_closure = self.tcx.coroutine_for_closure(def_id);
1570 self.tables
1571 .coroutine_for_closure
1572 .set_some(def_id.index, coroutine_for_closure.into());
1573
1574 if tcx.needs_coroutine_by_move_body_def_id(coroutine_for_closure) {
1576 self.tables.coroutine_by_move_body_def_id.set_some(
1577 coroutine_for_closure.index,
1578 self.tcx.coroutine_by_move_body_def_id(coroutine_for_closure).into(),
1579 );
1580 }
1581 }
1582 if let DefKind::Static { .. } = def_kind {
1583 if !self.tcx.is_foreign_item(def_id) {
1584 let data = self.tcx.eval_static_initializer(def_id).unwrap();
1585 record!(self.tables.eval_static_initializer[def_id] <- data);
1586 }
1587 }
1588 if let DefKind::Enum | DefKind::Struct | DefKind::Union = def_kind {
1589 self.encode_info_for_adt(local_id);
1590 }
1591 if let DefKind::Mod = def_kind {
1592 self.encode_info_for_mod(local_id);
1593 }
1594 if let DefKind::Macro(_) = def_kind {
1595 self.encode_info_for_macro(local_id);
1596 }
1597 if let DefKind::TyAlias = def_kind {
1598 self.tables
1599 .type_alias_is_lazy
1600 .set(def_id.index, self.tcx.type_alias_is_lazy(def_id));
1601 }
1602 if let DefKind::OpaqueTy = def_kind {
1603 self.encode_explicit_item_bounds(def_id);
1604 self.encode_explicit_item_self_bounds(def_id);
1605 record!(self.tables.opaque_ty_origin[def_id] <- self.tcx.opaque_ty_origin(def_id));
1606 self.encode_precise_capturing_args(def_id);
1607 if tcx.is_conditionally_const(def_id) {
1608 record_defaulted_array!(self.tables.explicit_implied_const_bounds[def_id]
1609 <- tcx.explicit_implied_const_bounds(def_id).skip_binder());
1610 }
1611 }
1612 if let DefKind::AnonConst = def_kind {
1613 record!(self.tables.anon_const_kind[def_id] <- self.tcx.anon_const_kind(def_id));
1614 }
1615 if tcx.impl_method_has_trait_impl_trait_tys(def_id)
1616 && let Ok(table) = self.tcx.collect_return_position_impl_trait_in_trait_tys(def_id)
1617 {
1618 record!(self.tables.trait_impl_trait_tys[def_id] <- table);
1619 }
1620 if should_encode_fn_impl_trait_in_trait(tcx, def_id) {
1621 let table = tcx.associated_types_for_impl_traits_in_associated_fn(def_id);
1622 record_defaulted_array!(self.tables.associated_types_for_impl_traits_in_associated_fn[def_id] <- table);
1623 }
1624 }
1625
1626 for (def_id, impls) in &tcx.crate_inherent_impls(()).0.inherent_impls {
1627 record_defaulted_array!(self.tables.inherent_impls[def_id.to_def_id()] <- impls.iter().map(|def_id| {
1628 assert!(def_id.is_local());
1629 def_id.index
1630 }));
1631 }
1632
1633 for (def_id, res_map) in &tcx.resolutions(()).doc_link_resolutions {
1634 record!(self.tables.doc_link_resolutions[def_id.to_def_id()] <- res_map);
1635 }
1636
1637 for (def_id, traits) in &tcx.resolutions(()).doc_link_traits_in_scope {
1638 record_array!(self.tables.doc_link_traits_in_scope[def_id.to_def_id()] <- traits);
1639 }
1640 }
1641
1642 #[instrument(level = "trace", skip(self))]
1643 fn encode_info_for_adt(&mut self, local_def_id: LocalDefId) {
1644 let def_id = local_def_id.to_def_id();
1645 let tcx = self.tcx;
1646 let adt_def = tcx.adt_def(def_id);
1647 record!(self.tables.repr_options[def_id] <- adt_def.repr());
1648
1649 let params_in_repr = self.tcx.params_in_repr(def_id);
1650 record!(self.tables.params_in_repr[def_id] <- params_in_repr);
1651
1652 if adt_def.is_enum() {
1653 let module_children = tcx.module_children_local(local_def_id);
1654 record_array!(self.tables.module_children_non_reexports[def_id] <-
1655 module_children.iter().map(|child| child.res.def_id().index));
1656 } else {
1657 debug_assert_eq!(adt_def.variants().len(), 1);
1659 debug_assert_eq!(adt_def.non_enum_variant().def_id, def_id);
1660 }
1662
1663 for (idx, variant) in adt_def.variants().iter_enumerated() {
1664 let data = VariantData {
1665 discr: variant.discr,
1666 idx,
1667 ctor: variant.ctor.map(|(kind, def_id)| (kind, def_id.index)),
1668 is_non_exhaustive: variant.is_field_list_non_exhaustive(),
1669 };
1670 record!(self.tables.variant_data[variant.def_id] <- data);
1671
1672 record_array!(self.tables.associated_item_or_field_def_ids[variant.def_id] <- variant.fields.iter().map(|f| {
1673 assert!(f.did.is_local());
1674 f.did.index
1675 }));
1676
1677 for field in &variant.fields {
1678 self.tables.safety.set_some(field.did.index, field.safety);
1679 }
1680
1681 if let Some((CtorKind::Fn, ctor_def_id)) = variant.ctor {
1682 let fn_sig = tcx.fn_sig(ctor_def_id);
1683 record!(self.tables.fn_sig[variant.def_id] <- fn_sig);
1685 }
1686 }
1687
1688 if let Some(destructor) = tcx.adt_destructor(local_def_id) {
1689 record!(self.tables.adt_destructor[def_id] <- destructor);
1690 }
1691
1692 if let Some(destructor) = tcx.adt_async_destructor(local_def_id) {
1693 record!(self.tables.adt_async_destructor[def_id] <- destructor);
1694 }
1695 }
1696
1697 #[instrument(level = "debug", skip(self))]
1698 fn encode_info_for_mod(&mut self, local_def_id: LocalDefId) {
1699 let tcx = self.tcx;
1700 let def_id = local_def_id.to_def_id();
1701
1702 if self.is_proc_macro {
1708 record!(self.tables.expn_that_defined[def_id] <- tcx.expn_that_defined(local_def_id));
1710 } else {
1711 let module_children = tcx.module_children_local(local_def_id);
1712
1713 record_array!(self.tables.module_children_non_reexports[def_id] <-
1714 module_children.iter().filter(|child| child.reexport_chain.is_empty())
1715 .map(|child| child.res.def_id().index));
1716
1717 record_defaulted_array!(self.tables.module_children_reexports[def_id] <-
1718 module_children.iter().filter(|child| !child.reexport_chain.is_empty()));
1719 }
1720 }
1721
1722 fn encode_explicit_item_bounds(&mut self, def_id: DefId) {
1723 debug!("EncodeContext::encode_explicit_item_bounds({:?})", def_id);
1724 let bounds = self.tcx.explicit_item_bounds(def_id).skip_binder();
1725 record_defaulted_array!(self.tables.explicit_item_bounds[def_id] <- bounds);
1726 }
1727
1728 fn encode_explicit_item_self_bounds(&mut self, def_id: DefId) {
1729 debug!("EncodeContext::encode_explicit_item_self_bounds({:?})", def_id);
1730 let bounds = self.tcx.explicit_item_self_bounds(def_id).skip_binder();
1731 record_defaulted_array!(self.tables.explicit_item_self_bounds[def_id] <- bounds);
1732 }
1733
1734 #[instrument(level = "debug", skip(self))]
1735 fn encode_info_for_assoc_item(&mut self, def_id: DefId) {
1736 let tcx = self.tcx;
1737 let item = tcx.associated_item(def_id);
1738
1739 self.tables.defaultness.set_some(def_id.index, item.defaultness(tcx));
1740 self.tables.assoc_container.set_some(def_id.index, item.container);
1741
1742 match item.container {
1743 AssocItemContainer::Trait => {
1744 if item.is_type() {
1745 self.encode_explicit_item_bounds(def_id);
1746 self.encode_explicit_item_self_bounds(def_id);
1747 if tcx.is_conditionally_const(def_id) {
1748 record_defaulted_array!(self.tables.explicit_implied_const_bounds[def_id]
1749 <- self.tcx.explicit_implied_const_bounds(def_id).skip_binder());
1750 }
1751 }
1752 }
1753 AssocItemContainer::Impl => {
1754 if let Some(trait_item_def_id) = item.trait_item_def_id {
1755 self.tables.trait_item_def_id.set_some(def_id.index, trait_item_def_id.into());
1756 }
1757 }
1758 }
1759 if let ty::AssocKind::Type { data: ty::AssocTypeData::Rpitit(rpitit_info) } = item.kind {
1760 record!(self.tables.opt_rpitit_info[def_id] <- rpitit_info);
1761 if matches!(rpitit_info, ty::ImplTraitInTraitData::Trait { .. }) {
1762 record_array!(
1763 self.tables.assumed_wf_types_for_rpitit[def_id]
1764 <- self.tcx.assumed_wf_types_for_rpitit(def_id)
1765 );
1766 self.encode_precise_capturing_args(def_id);
1767 }
1768 }
1769 }
1770
1771 fn encode_precise_capturing_args(&mut self, def_id: DefId) {
1772 let Some(precise_capturing_args) = self.tcx.rendered_precise_capturing_args(def_id) else {
1773 return;
1774 };
1775
1776 record_array!(self.tables.rendered_precise_capturing_args[def_id] <- precise_capturing_args);
1777 }
1778
1779 fn encode_mir(&mut self) {
1780 if self.is_proc_macro {
1781 return;
1782 }
1783
1784 let tcx = self.tcx;
1785 let reachable_set = tcx.reachable_set(());
1786
1787 let keys_and_jobs = tcx.mir_keys(()).iter().filter_map(|&def_id| {
1788 let (encode_const, encode_opt) = should_encode_mir(tcx, reachable_set, def_id);
1789 if encode_const || encode_opt { Some((def_id, encode_const, encode_opt)) } else { None }
1790 });
1791 for (def_id, encode_const, encode_opt) in keys_and_jobs {
1792 debug_assert!(encode_const || encode_opt);
1793
1794 debug!("EntryBuilder::encode_mir({:?})", def_id);
1795 if encode_opt {
1796 record!(self.tables.optimized_mir[def_id.to_def_id()] <- tcx.optimized_mir(def_id));
1797 self.tables
1798 .cross_crate_inlinable
1799 .set(def_id.to_def_id().index, self.tcx.cross_crate_inlinable(def_id));
1800 record!(self.tables.closure_saved_names_of_captured_variables[def_id.to_def_id()]
1801 <- tcx.closure_saved_names_of_captured_variables(def_id));
1802
1803 if self.tcx.is_coroutine(def_id.to_def_id())
1804 && let Some(witnesses) = tcx.mir_coroutine_witnesses(def_id)
1805 {
1806 record!(self.tables.mir_coroutine_witnesses[def_id.to_def_id()] <- witnesses);
1807 }
1808 }
1809 if encode_const {
1810 record!(self.tables.mir_for_ctfe[def_id.to_def_id()] <- tcx.mir_for_ctfe(def_id));
1811
1812 let abstract_const = tcx.thir_abstract_const(def_id);
1814 if let Ok(Some(abstract_const)) = abstract_const {
1815 record!(self.tables.thir_abstract_const[def_id.to_def_id()] <- abstract_const);
1816 }
1817
1818 if should_encode_const(tcx.def_kind(def_id)) {
1819 let qualifs = tcx.mir_const_qualif(def_id);
1820 record!(self.tables.mir_const_qualif[def_id.to_def_id()] <- qualifs);
1821 let body = tcx.hir_maybe_body_owned_by(def_id);
1822 if let Some(body) = body {
1823 let const_data = rendered_const(self.tcx, &body, def_id);
1824 record!(self.tables.rendered_const[def_id.to_def_id()] <- const_data);
1825 }
1826 }
1827 }
1828 record!(self.tables.promoted_mir[def_id.to_def_id()] <- tcx.promoted_mir(def_id));
1829
1830 if self.tcx.is_coroutine(def_id.to_def_id())
1831 && let Some(witnesses) = tcx.mir_coroutine_witnesses(def_id)
1832 {
1833 record!(self.tables.mir_coroutine_witnesses[def_id.to_def_id()] <- witnesses);
1834 }
1835 }
1836
1837 if tcx.sess.opts.output_types.should_codegen()
1841 && tcx.sess.opts.optimize != OptLevel::No
1842 && tcx.sess.opts.incremental.is_none()
1843 {
1844 for &local_def_id in tcx.mir_keys(()) {
1845 if let DefKind::AssocFn | DefKind::Fn = tcx.def_kind(local_def_id) {
1846 record_array!(self.tables.deduced_param_attrs[local_def_id.to_def_id()] <-
1847 self.tcx.deduced_param_attrs(local_def_id.to_def_id()));
1848 }
1849 }
1850 }
1851 }
1852
1853 #[instrument(level = "debug", skip(self))]
1854 fn encode_stability(&mut self, def_id: DefId) {
1855 if self.feat.staged_api() || self.tcx.sess.opts.unstable_opts.force_unstable_if_unmarked {
1858 if let Some(stab) = self.tcx.lookup_stability(def_id) {
1859 record!(self.tables.lookup_stability[def_id] <- stab)
1860 }
1861 }
1862 }
1863
1864 #[instrument(level = "debug", skip(self))]
1865 fn encode_const_stability(&mut self, def_id: DefId) {
1866 if self.feat.staged_api() || self.tcx.sess.opts.unstable_opts.force_unstable_if_unmarked {
1869 if let Some(stab) = self.tcx.lookup_const_stability(def_id) {
1870 record!(self.tables.lookup_const_stability[def_id] <- stab)
1871 }
1872 }
1873 }
1874
1875 #[instrument(level = "debug", skip(self))]
1876 fn encode_default_body_stability(&mut self, def_id: DefId) {
1877 if self.feat.staged_api() || self.tcx.sess.opts.unstable_opts.force_unstable_if_unmarked {
1880 if let Some(stab) = self.tcx.lookup_default_body_stability(def_id) {
1881 record!(self.tables.lookup_default_body_stability[def_id] <- stab)
1882 }
1883 }
1884 }
1885
1886 #[instrument(level = "debug", skip(self))]
1887 fn encode_deprecation(&mut self, def_id: DefId) {
1888 if let Some(depr) = self.tcx.lookup_deprecation(def_id) {
1889 record!(self.tables.lookup_deprecation_entry[def_id] <- depr);
1890 }
1891 }
1892
1893 #[instrument(level = "debug", skip(self))]
1894 fn encode_info_for_macro(&mut self, def_id: LocalDefId) {
1895 let tcx = self.tcx;
1896
1897 let (_, macro_def, _) = tcx.hir_expect_item(def_id).expect_macro();
1898 self.tables.is_macro_rules.set(def_id.local_def_index, macro_def.macro_rules);
1899 record!(self.tables.macro_definition[def_id.to_def_id()] <- &*macro_def.body);
1900 }
1901
1902 fn encode_native_libraries(&mut self) -> LazyArray<NativeLib> {
1903 empty_proc_macro!(self);
1904 let used_libraries = self.tcx.native_libraries(LOCAL_CRATE);
1905 self.lazy_array(used_libraries.iter())
1906 }
1907
1908 fn encode_foreign_modules(&mut self) -> LazyArray<ForeignModule> {
1909 empty_proc_macro!(self);
1910 let foreign_modules = self.tcx.foreign_modules(LOCAL_CRATE);
1911 self.lazy_array(foreign_modules.iter().map(|(_, m)| m).cloned())
1912 }
1913
1914 fn encode_hygiene(&mut self) -> (SyntaxContextTable, ExpnDataTable, ExpnHashTable) {
1915 let mut syntax_contexts: TableBuilder<_, _> = Default::default();
1916 let mut expn_data_table: TableBuilder<_, _> = Default::default();
1917 let mut expn_hash_table: TableBuilder<_, _> = Default::default();
1918
1919 self.hygiene_ctxt.encode(
1920 &mut (&mut *self, &mut syntax_contexts, &mut expn_data_table, &mut expn_hash_table),
1921 |(this, syntax_contexts, _, _), index, ctxt_data| {
1922 syntax_contexts.set_some(index, this.lazy(ctxt_data));
1923 },
1924 |(this, _, expn_data_table, expn_hash_table), index, expn_data, hash| {
1925 if let Some(index) = index.as_local() {
1926 expn_data_table.set_some(index.as_raw(), this.lazy(expn_data));
1927 expn_hash_table.set_some(index.as_raw(), this.lazy(hash));
1928 }
1929 },
1930 );
1931
1932 (
1933 syntax_contexts.encode(&mut self.opaque),
1934 expn_data_table.encode(&mut self.opaque),
1935 expn_hash_table.encode(&mut self.opaque),
1936 )
1937 }
1938
1939 fn encode_proc_macros(&mut self) -> Option<ProcMacroData> {
1940 let is_proc_macro = self.tcx.crate_types().contains(&CrateType::ProcMacro);
1941 if is_proc_macro {
1942 let tcx = self.tcx;
1943 let proc_macro_decls_static = tcx.proc_macro_decls_static(()).unwrap().local_def_index;
1944 let stability = tcx.lookup_stability(CRATE_DEF_ID);
1945 let macros =
1946 self.lazy_array(tcx.resolutions(()).proc_macros.iter().map(|p| p.local_def_index));
1947 for (i, span) in self.tcx.sess.psess.proc_macro_quoted_spans() {
1948 let span = self.lazy(span);
1949 self.tables.proc_macro_quoted_spans.set_some(i, span);
1950 }
1951
1952 self.tables.def_kind.set_some(LOCAL_CRATE.as_def_id().index, DefKind::Mod);
1953 record!(self.tables.def_span[LOCAL_CRATE.as_def_id()] <- tcx.def_span(LOCAL_CRATE.as_def_id()));
1954 self.encode_attrs(LOCAL_CRATE.as_def_id().expect_local());
1955 let vis = tcx.local_visibility(CRATE_DEF_ID).map_id(|def_id| def_id.local_def_index);
1956 record!(self.tables.visibility[LOCAL_CRATE.as_def_id()] <- vis);
1957 if let Some(stability) = stability {
1958 record!(self.tables.lookup_stability[LOCAL_CRATE.as_def_id()] <- stability);
1959 }
1960 self.encode_deprecation(LOCAL_CRATE.as_def_id());
1961 if let Some(res_map) = tcx.resolutions(()).doc_link_resolutions.get(&CRATE_DEF_ID) {
1962 record!(self.tables.doc_link_resolutions[LOCAL_CRATE.as_def_id()] <- res_map);
1963 }
1964 if let Some(traits) = tcx.resolutions(()).doc_link_traits_in_scope.get(&CRATE_DEF_ID) {
1965 record_array!(self.tables.doc_link_traits_in_scope[LOCAL_CRATE.as_def_id()] <- traits);
1966 }
1967
1968 for &proc_macro in &tcx.resolutions(()).proc_macros {
1972 let id = proc_macro;
1973 let proc_macro = tcx.local_def_id_to_hir_id(proc_macro);
1974 let mut name = tcx.hir_name(proc_macro);
1975 let span = tcx.hir_span(proc_macro);
1976 let attrs = tcx.hir_attrs(proc_macro);
1979 let macro_kind = if ast::attr::contains_name(attrs, sym::proc_macro) {
1980 MacroKind::Bang
1981 } else if ast::attr::contains_name(attrs, sym::proc_macro_attribute) {
1982 MacroKind::Attr
1983 } else if let Some(attr) = ast::attr::find_by_name(attrs, sym::proc_macro_derive) {
1984 name = attr.meta_item_list().unwrap()[0]
1986 .meta_item()
1987 .unwrap()
1988 .ident()
1989 .unwrap()
1990 .name;
1991 MacroKind::Derive
1992 } else {
1993 bug!("Unknown proc-macro type for item {:?}", id);
1994 };
1995
1996 let mut def_key = self.tcx.hir_def_key(id);
1997 def_key.disambiguated_data.data = DefPathData::MacroNs(name);
1998
1999 let def_id = id.to_def_id();
2000 self.tables.def_kind.set_some(def_id.index, DefKind::Macro(macro_kind));
2001 self.tables.proc_macro.set_some(def_id.index, macro_kind);
2002 self.encode_attrs(id);
2003 record!(self.tables.def_keys[def_id] <- def_key);
2004 record!(self.tables.def_ident_span[def_id] <- span);
2005 record!(self.tables.def_span[def_id] <- span);
2006 record!(self.tables.visibility[def_id] <- ty::Visibility::Public);
2007 if let Some(stability) = stability {
2008 record!(self.tables.lookup_stability[def_id] <- stability);
2009 }
2010 }
2011
2012 Some(ProcMacroData { proc_macro_decls_static, stability, macros })
2013 } else {
2014 None
2015 }
2016 }
2017
2018 fn encode_debugger_visualizers(&mut self) -> LazyArray<DebuggerVisualizerFile> {
2019 empty_proc_macro!(self);
2020 self.lazy_array(
2021 self.tcx
2022 .debugger_visualizers(LOCAL_CRATE)
2023 .iter()
2024 .map(DebuggerVisualizerFile::path_erased),
2029 )
2030 }
2031
2032 fn encode_crate_deps(&mut self) -> LazyArray<CrateDep> {
2033 empty_proc_macro!(self);
2034
2035 let deps = self
2036 .tcx
2037 .crates(())
2038 .iter()
2039 .map(|&cnum| {
2040 let dep = CrateDep {
2041 name: self.tcx.crate_name(cnum),
2042 hash: self.tcx.crate_hash(cnum),
2043 host_hash: self.tcx.crate_host_hash(cnum),
2044 kind: self.tcx.dep_kind(cnum),
2045 extra_filename: self.tcx.extra_filename(cnum).clone(),
2046 is_private: self.tcx.is_private_dep(cnum),
2047 };
2048 (cnum, dep)
2049 })
2050 .collect::<Vec<_>>();
2051
2052 {
2053 let mut expected_cnum = 1;
2055 for &(n, _) in &deps {
2056 assert_eq!(n, CrateNum::new(expected_cnum));
2057 expected_cnum += 1;
2058 }
2059 }
2060
2061 self.lazy_array(deps.iter().map(|(_, dep)| dep))
2066 }
2067
2068 fn encode_target_modifiers(&mut self) -> LazyArray<TargetModifier> {
2069 empty_proc_macro!(self);
2070 let tcx = self.tcx;
2071 self.lazy_array(tcx.sess.opts.gather_target_modifiers())
2072 }
2073
2074 fn encode_lib_features(&mut self) -> LazyArray<(Symbol, FeatureStability)> {
2075 empty_proc_macro!(self);
2076 let tcx = self.tcx;
2077 let lib_features = tcx.lib_features(LOCAL_CRATE);
2078 self.lazy_array(lib_features.to_sorted_vec())
2079 }
2080
2081 fn encode_stability_implications(&mut self) -> LazyArray<(Symbol, Symbol)> {
2082 empty_proc_macro!(self);
2083 let tcx = self.tcx;
2084 let implications = tcx.stability_implications(LOCAL_CRATE);
2085 let sorted = implications.to_sorted_stable_ord();
2086 self.lazy_array(sorted.into_iter().map(|(k, v)| (*k, *v)))
2087 }
2088
2089 fn encode_diagnostic_items(&mut self) -> LazyArray<(Symbol, DefIndex)> {
2090 empty_proc_macro!(self);
2091 let tcx = self.tcx;
2092 let diagnostic_items = &tcx.diagnostic_items(LOCAL_CRATE).name_to_id;
2093 self.lazy_array(diagnostic_items.iter().map(|(&name, def_id)| (name, def_id.index)))
2094 }
2095
2096 fn encode_lang_items(&mut self) -> LazyArray<(DefIndex, LangItem)> {
2097 empty_proc_macro!(self);
2098 let lang_items = self.tcx.lang_items().iter();
2099 self.lazy_array(lang_items.filter_map(|(lang_item, def_id)| {
2100 def_id.as_local().map(|id| (id.local_def_index, lang_item))
2101 }))
2102 }
2103
2104 fn encode_lang_items_missing(&mut self) -> LazyArray<LangItem> {
2105 empty_proc_macro!(self);
2106 let tcx = self.tcx;
2107 self.lazy_array(&tcx.lang_items().missing)
2108 }
2109
2110 fn encode_stripped_cfg_items(&mut self) -> LazyArray<StrippedCfgItem<DefIndex>> {
2111 self.lazy_array(
2112 self.tcx
2113 .stripped_cfg_items(LOCAL_CRATE)
2114 .into_iter()
2115 .map(|item| item.clone().map_mod_id(|def_id| def_id.index)),
2116 )
2117 }
2118
2119 fn encode_traits(&mut self) -> LazyArray<DefIndex> {
2120 empty_proc_macro!(self);
2121 self.lazy_array(self.tcx.traits(LOCAL_CRATE).iter().map(|def_id| def_id.index))
2122 }
2123
2124 #[instrument(level = "debug", skip(self))]
2126 fn encode_impls(&mut self) -> LazyArray<TraitImpls> {
2127 empty_proc_macro!(self);
2128 let tcx = self.tcx;
2129 let mut trait_impls: FxIndexMap<DefId, Vec<(DefIndex, Option<SimplifiedType>)>> =
2130 FxIndexMap::default();
2131
2132 for id in tcx.hir_free_items() {
2133 let DefKind::Impl { of_trait } = tcx.def_kind(id.owner_id) else {
2134 continue;
2135 };
2136 let def_id = id.owner_id.to_def_id();
2137
2138 self.tables.defaultness.set_some(def_id.index, tcx.defaultness(def_id));
2139
2140 if of_trait && let Some(header) = tcx.impl_trait_header(def_id) {
2141 record!(self.tables.impl_trait_header[def_id] <- header);
2142
2143 let trait_ref = header.trait_ref.instantiate_identity();
2144 let simplified_self_ty = fast_reject::simplify_type(
2145 self.tcx,
2146 trait_ref.self_ty(),
2147 TreatParams::InstantiateWithInfer,
2148 );
2149 trait_impls
2150 .entry(trait_ref.def_id)
2151 .or_default()
2152 .push((id.owner_id.def_id.local_def_index, simplified_self_ty));
2153
2154 let trait_def = tcx.trait_def(trait_ref.def_id);
2155 if let Ok(mut an) = trait_def.ancestors(tcx, def_id) {
2156 if let Some(specialization_graph::Node::Impl(parent)) = an.nth(1) {
2157 self.tables.impl_parent.set_some(def_id.index, parent.into());
2158 }
2159 }
2160
2161 if tcx.is_lang_item(trait_ref.def_id, LangItem::CoerceUnsized) {
2164 let coerce_unsized_info = tcx.coerce_unsized_info(def_id).unwrap();
2165 record!(self.tables.coerce_unsized_info[def_id] <- coerce_unsized_info);
2166 }
2167 }
2168 }
2169
2170 let trait_impls: Vec<_> = trait_impls
2171 .into_iter()
2172 .map(|(trait_def_id, impls)| TraitImpls {
2173 trait_id: (trait_def_id.krate.as_u32(), trait_def_id.index),
2174 impls: self.lazy_array(&impls),
2175 })
2176 .collect();
2177
2178 self.lazy_array(&trait_impls)
2179 }
2180
2181 #[instrument(level = "debug", skip(self))]
2182 fn encode_incoherent_impls(&mut self) -> LazyArray<IncoherentImpls> {
2183 empty_proc_macro!(self);
2184 let tcx = self.tcx;
2185
2186 let all_impls: Vec<_> = tcx
2187 .crate_inherent_impls(())
2188 .0
2189 .incoherent_impls
2190 .iter()
2191 .map(|(&simp, impls)| IncoherentImpls {
2192 self_ty: simp,
2193 impls: self.lazy_array(impls.iter().map(|def_id| def_id.local_def_index)),
2194 })
2195 .collect();
2196
2197 self.lazy_array(&all_impls)
2198 }
2199
2200 fn encode_exportable_items(&mut self) -> LazyArray<DefIndex> {
2201 empty_proc_macro!(self);
2202 self.lazy_array(self.tcx.exportable_items(LOCAL_CRATE).iter().map(|def_id| def_id.index))
2203 }
2204
2205 fn encode_stable_order_of_exportable_impls(&mut self) -> LazyArray<(DefIndex, usize)> {
2206 empty_proc_macro!(self);
2207 let stable_order_of_exportable_impls =
2208 self.tcx.stable_order_of_exportable_impls(LOCAL_CRATE);
2209 self.lazy_array(
2210 stable_order_of_exportable_impls.iter().map(|(def_id, idx)| (def_id.index, *idx)),
2211 )
2212 }
2213
2214 fn encode_exported_symbols(
2221 &mut self,
2222 exported_symbols: &[(ExportedSymbol<'tcx>, SymbolExportInfo)],
2223 ) -> LazyArray<(ExportedSymbol<'static>, SymbolExportInfo)> {
2224 empty_proc_macro!(self);
2225 let metadata_symbol_name = SymbolName::new(self.tcx, &metadata_symbol_name(self.tcx));
2228
2229 self.lazy_array(
2230 exported_symbols
2231 .iter()
2232 .filter(|&(exported_symbol, _)| match *exported_symbol {
2233 ExportedSymbol::NoDefId(symbol_name) => symbol_name != metadata_symbol_name,
2234 _ => true,
2235 })
2236 .cloned(),
2237 )
2238 }
2239
2240 fn encode_dylib_dependency_formats(&mut self) -> LazyArray<Option<LinkagePreference>> {
2241 empty_proc_macro!(self);
2242 let formats = self.tcx.dependency_formats(());
2243 if let Some(arr) = formats.get(&CrateType::Dylib) {
2244 return self.lazy_array(arr.iter().skip(1 ).map(
2245 |slot| match *slot {
2246 Linkage::NotLinked | Linkage::IncludedFromDylib => None,
2247
2248 Linkage::Dynamic => Some(LinkagePreference::RequireDynamic),
2249 Linkage::Static => Some(LinkagePreference::RequireStatic),
2250 },
2251 ));
2252 }
2253 LazyArray::default()
2254 }
2255}
2256
2257fn prefetch_mir(tcx: TyCtxt<'_>) {
2260 if !tcx.sess.opts.output_types.should_codegen() {
2261 return;
2263 }
2264
2265 let reachable_set = tcx.reachable_set(());
2266 par_for_each_in(tcx.mir_keys(()), |&&def_id| {
2267 let (encode_const, encode_opt) = should_encode_mir(tcx, reachable_set, def_id);
2268
2269 if encode_const {
2270 tcx.ensure_done().mir_for_ctfe(def_id);
2271 }
2272 if encode_opt {
2273 tcx.ensure_done().optimized_mir(def_id);
2274 }
2275 if encode_opt || encode_const {
2276 tcx.ensure_done().promoted_mir(def_id);
2277 }
2278 })
2279}
2280
2281pub struct EncodedMetadata {
2305 full_metadata: Option<Mmap>,
2308 stub_metadata: Option<Vec<u8>>,
2311 path: Option<Box<Path>>,
2313 _temp_dir: Option<MaybeTempDir>,
2316}
2317
2318impl EncodedMetadata {
2319 #[inline]
2320 pub fn from_path(
2321 path: PathBuf,
2322 stub_path: Option<PathBuf>,
2323 temp_dir: Option<MaybeTempDir>,
2324 ) -> std::io::Result<Self> {
2325 let file = std::fs::File::open(&path)?;
2326 let file_metadata = file.metadata()?;
2327 if file_metadata.len() == 0 {
2328 return Ok(Self {
2329 full_metadata: None,
2330 stub_metadata: None,
2331 path: None,
2332 _temp_dir: None,
2333 });
2334 }
2335 let full_mmap = unsafe { Some(Mmap::map(file)?) };
2336
2337 let stub =
2338 if let Some(stub_path) = stub_path { Some(std::fs::read(stub_path)?) } else { None };
2339
2340 Ok(Self {
2341 full_metadata: full_mmap,
2342 stub_metadata: stub,
2343 path: Some(path.into()),
2344 _temp_dir: temp_dir,
2345 })
2346 }
2347
2348 #[inline]
2349 pub fn full(&self) -> &[u8] {
2350 &self.full_metadata.as_deref().unwrap_or_default()
2351 }
2352
2353 #[inline]
2354 pub fn stub_or_full(&self) -> &[u8] {
2355 self.stub_metadata.as_deref().unwrap_or(self.full())
2356 }
2357
2358 #[inline]
2359 pub fn path(&self) -> Option<&Path> {
2360 self.path.as_deref()
2361 }
2362}
2363
2364impl<S: Encoder> Encodable<S> for EncodedMetadata {
2365 fn encode(&self, s: &mut S) {
2366 self.stub_metadata.encode(s);
2367
2368 let slice = self.full();
2369 slice.encode(s)
2370 }
2371}
2372
2373impl<D: Decoder> Decodable<D> for EncodedMetadata {
2374 fn decode(d: &mut D) -> Self {
2375 let stub = <Option<Vec<u8>>>::decode(d);
2376
2377 let len = d.read_usize();
2378 let full_metadata = if len > 0 {
2379 let mut mmap = MmapMut::map_anon(len).unwrap();
2380 mmap.copy_from_slice(d.read_raw_bytes(len));
2381 Some(mmap.make_read_only().unwrap())
2382 } else {
2383 None
2384 };
2385
2386 Self { full_metadata, stub_metadata: stub, path: None, _temp_dir: None }
2387 }
2388}
2389
2390#[instrument(level = "trace", skip(tcx))]
2391pub fn encode_metadata(tcx: TyCtxt<'_>, path: &Path, ref_path: Option<&Path>) {
2392 tcx.dep_graph.assert_ignored();
2395
2396 if let Some(ref_path) = ref_path {
2398 let _prof_timer = tcx.prof.verbose_generic_activity("generate_crate_metadata_stub");
2399
2400 with_encode_metadata_header(tcx, ref_path, |ecx| {
2401 let header: LazyValue<CrateHeader> = ecx.lazy(CrateHeader {
2402 name: tcx.crate_name(LOCAL_CRATE),
2403 triple: tcx.sess.opts.target_triple.clone(),
2404 hash: tcx.crate_hash(LOCAL_CRATE),
2405 is_proc_macro_crate: false,
2406 is_stub: true,
2407 });
2408 header.position.get()
2409 })
2410 }
2411
2412 let _prof_timer = tcx.prof.verbose_generic_activity("generate_crate_metadata");
2413
2414 let dep_node = tcx.metadata_dep_node();
2415
2416 if tcx.dep_graph.is_fully_enabled()
2418 && let work_product_id = WorkProductId::from_cgu_name("metadata")
2419 && let Some(work_product) = tcx.dep_graph.previous_work_product(&work_product_id)
2420 && tcx.try_mark_green(&dep_node)
2421 {
2422 let saved_path = &work_product.saved_files["rmeta"];
2423 let incr_comp_session_dir = tcx.sess.incr_comp_session_dir_opt().unwrap();
2424 let source_file = rustc_incremental::in_incr_comp_dir(&incr_comp_session_dir, saved_path);
2425 debug!("copying preexisting metadata from {source_file:?} to {path:?}");
2426 match rustc_fs_util::link_or_copy(&source_file, path) {
2427 Ok(_) => {}
2428 Err(err) => tcx.dcx().emit_fatal(FailCreateFileEncoder { err }),
2429 };
2430 return;
2431 };
2432
2433 if tcx.sess.threads() != 1 {
2434 join(
2438 || prefetch_mir(tcx),
2439 || {
2440 let _ = tcx.exported_non_generic_symbols(LOCAL_CRATE);
2441 let _ = tcx.exported_generic_symbols(LOCAL_CRATE);
2442 },
2443 );
2444 }
2445
2446 tcx.dep_graph.with_task(
2449 dep_node,
2450 tcx,
2451 path,
2452 |tcx, path| {
2453 with_encode_metadata_header(tcx, path, |ecx| {
2454 let root = ecx.encode_crate_root();
2457
2458 ecx.opaque.flush();
2460 tcx.prof.artifact_size(
2462 "crate_metadata",
2463 "crate_metadata",
2464 ecx.opaque.file().metadata().unwrap().len(),
2465 );
2466
2467 root.position.get()
2468 })
2469 },
2470 None,
2471 );
2472}
2473
2474fn with_encode_metadata_header(
2475 tcx: TyCtxt<'_>,
2476 path: &Path,
2477 f: impl FnOnce(&mut EncodeContext<'_, '_>) -> usize,
2478) {
2479 let mut encoder = opaque::FileEncoder::new(path)
2480 .unwrap_or_else(|err| tcx.dcx().emit_fatal(FailCreateFileEncoder { err }));
2481 encoder.emit_raw_bytes(METADATA_HEADER);
2482
2483 encoder.emit_raw_bytes(&0u64.to_le_bytes());
2485
2486 let source_map_files = tcx.sess.source_map().files();
2487 let source_file_cache = (Arc::clone(&source_map_files[0]), 0);
2488 let required_source_files = Some(FxIndexSet::default());
2489 drop(source_map_files);
2490
2491 let hygiene_ctxt = HygieneEncodeContext::default();
2492
2493 let mut ecx = EncodeContext {
2494 opaque: encoder,
2495 tcx,
2496 feat: tcx.features(),
2497 tables: Default::default(),
2498 lazy_state: LazyState::NoNode,
2499 span_shorthands: Default::default(),
2500 type_shorthands: Default::default(),
2501 predicate_shorthands: Default::default(),
2502 source_file_cache,
2503 interpret_allocs: Default::default(),
2504 required_source_files,
2505 is_proc_macro: tcx.crate_types().contains(&CrateType::ProcMacro),
2506 hygiene_ctxt: &hygiene_ctxt,
2507 symbol_index_table: Default::default(),
2508 };
2509
2510 rustc_version(tcx.sess.cfg_version).encode(&mut ecx);
2512
2513 let root_position = f(&mut ecx);
2514
2515 if let Err((path, err)) = ecx.opaque.finish() {
2519 tcx.dcx().emit_fatal(FailWriteFile { path: &path, err });
2520 }
2521
2522 let file = ecx.opaque.file();
2523 if let Err(err) = encode_root_position(file, root_position) {
2524 tcx.dcx().emit_fatal(FailWriteFile { path: ecx.opaque.path(), err });
2525 }
2526}
2527
2528fn encode_root_position(mut file: &File, pos: usize) -> Result<(), std::io::Error> {
2529 let pos_before_seek = file.stream_position().unwrap();
2531
2532 let header = METADATA_HEADER.len();
2534 file.seek(std::io::SeekFrom::Start(header as u64))?;
2535 file.write_all(&pos.to_le_bytes())?;
2536
2537 file.seek(std::io::SeekFrom::Start(pos_before_seek))?;
2539 Ok(())
2540}
2541
2542pub(crate) fn provide(providers: &mut Providers) {
2543 *providers = Providers {
2544 doc_link_resolutions: |tcx, def_id| {
2545 tcx.resolutions(())
2546 .doc_link_resolutions
2547 .get(&def_id)
2548 .unwrap_or_else(|| span_bug!(tcx.def_span(def_id), "no resolutions for a doc link"))
2549 },
2550 doc_link_traits_in_scope: |tcx, def_id| {
2551 tcx.resolutions(()).doc_link_traits_in_scope.get(&def_id).unwrap_or_else(|| {
2552 span_bug!(tcx.def_span(def_id), "no traits in scope for a doc link")
2553 })
2554 },
2555
2556 ..*providers
2557 }
2558}
2559
2560pub fn rendered_const<'tcx>(tcx: TyCtxt<'tcx>, body: &hir::Body<'_>, def_id: LocalDefId) -> String {
2588 let value = body.value;
2589
2590 #[derive(PartialEq, Eq)]
2591 enum Classification {
2592 Literal,
2593 Simple,
2594 Complex,
2595 }
2596
2597 use Classification::*;
2598
2599 fn classify(expr: &hir::Expr<'_>) -> Classification {
2600 match &expr.kind {
2601 hir::ExprKind::Unary(hir::UnOp::Neg, expr) => {
2602 if matches!(expr.kind, hir::ExprKind::Lit(_)) { Literal } else { Complex }
2603 }
2604 hir::ExprKind::Lit(_) => Literal,
2605 hir::ExprKind::Tup([]) => Simple,
2606 hir::ExprKind::Block(hir::Block { stmts: [], expr: Some(expr), .. }, _) => {
2607 if classify(expr) == Complex { Complex } else { Simple }
2608 }
2609 hir::ExprKind::Path(hir::QPath::Resolved(_, hir::Path { segments, .. })) => {
2614 if segments.iter().all(|segment| segment.args.is_none()) { Simple } else { Complex }
2615 }
2616 hir::ExprKind::Path(hir::QPath::TypeRelative(..)) => Simple,
2619 hir::ExprKind::Path(hir::QPath::LangItem(..)) => Simple,
2621 _ => Complex,
2622 }
2623 }
2624
2625 match classify(value) {
2626 Literal
2636 if !value.span.from_expansion()
2637 && let Ok(snippet) = tcx.sess.source_map().span_to_snippet(value.span) =>
2638 {
2639 snippet
2640 }
2641
2642 Literal | Simple => id_to_string(&tcx, body.id().hir_id),
2645
2646 Complex => {
2650 if tcx.def_kind(def_id) == DefKind::AnonConst {
2651 "{ _ }".to_owned()
2652 } else {
2653 "_".to_owned()
2654 }
2655 }
2656 }
2657}