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_ast::attr::AttributeExt;
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::format_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::middle::dependency_format::Linkage;
20use rustc_middle::middle::exported_symbols::metadata_symbol_name;
21use rustc_middle::mir::interpret;
22use rustc_middle::query::Providers;
23use rustc_middle::traits::specialization_graph;
24use rustc_middle::ty::codec::TyEncoder;
25use rustc_middle::ty::fast_reject::{self, TreatParams};
26use rustc_middle::ty::{AssocItemContainer, SymbolName};
27use rustc_middle::{bug, span_bug};
28use rustc_serialize::{Decodable, Decoder, Encodable, Encoder, opaque};
29use rustc_session::config::{CrateType, OptLevel, TargetModifier};
30use rustc_span::hygiene::HygieneEncodeContext;
31use rustc_span::{
32 ExternalSource, FileName, SourceFile, SpanData, SpanEncoder, StableSourceFileId, SyntaxContext,
33 sym,
34};
35use tracing::{debug, instrument, trace};
36
37use crate::errors::{FailCreateFileEncoder, FailWriteFile};
38use crate::rmeta::*;
39
40pub(super) struct EncodeContext<'a, 'tcx> {
41 opaque: opaque::FileEncoder,
42 tcx: TyCtxt<'tcx>,
43 feat: &'tcx rustc_feature::Features,
44 tables: TableBuilders,
45
46 lazy_state: LazyState,
47 span_shorthands: FxHashMap<Span, usize>,
48 type_shorthands: FxHashMap<Ty<'tcx>, usize>,
49 predicate_shorthands: FxHashMap<ty::PredicateKind<'tcx>, usize>,
50
51 interpret_allocs: FxIndexSet<interpret::AllocId>,
52
53 source_file_cache: (Arc<SourceFile>, usize),
57 required_source_files: Option<FxIndexSet<usize>>,
64 is_proc_macro: bool,
65 hygiene_ctxt: &'a HygieneEncodeContext,
66 symbol_table: FxHashMap<Symbol, usize>,
67}
68
69macro_rules! empty_proc_macro {
73 ($self:ident) => {
74 if $self.is_proc_macro {
75 return LazyArray::default();
76 }
77 };
78}
79
80macro_rules! encoder_methods {
81 ($($name:ident($ty:ty);)*) => {
82 $(fn $name(&mut self, value: $ty) {
83 self.opaque.$name(value)
84 })*
85 }
86}
87
88impl<'a, 'tcx> Encoder for EncodeContext<'a, 'tcx> {
89 encoder_methods! {
90 emit_usize(usize);
91 emit_u128(u128);
92 emit_u64(u64);
93 emit_u32(u32);
94 emit_u16(u16);
95 emit_u8(u8);
96
97 emit_isize(isize);
98 emit_i128(i128);
99 emit_i64(i64);
100 emit_i32(i32);
101 emit_i16(i16);
102
103 emit_raw_bytes(&[u8]);
104 }
105}
106
107impl<'a, 'tcx, T> Encodable<EncodeContext<'a, 'tcx>> for LazyValue<T> {
108 fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
109 e.emit_lazy_distance(self.position);
110 }
111}
112
113impl<'a, 'tcx, T> Encodable<EncodeContext<'a, 'tcx>> for LazyArray<T> {
114 fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
115 e.emit_usize(self.num_elems);
116 if self.num_elems > 0 {
117 e.emit_lazy_distance(self.position)
118 }
119 }
120}
121
122impl<'a, 'tcx, I, T> Encodable<EncodeContext<'a, 'tcx>> for LazyTable<I, T> {
123 fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
124 e.emit_usize(self.width);
125 e.emit_usize(self.len);
126 e.emit_lazy_distance(self.position);
127 }
128}
129
130impl<'a, 'tcx> Encodable<EncodeContext<'a, 'tcx>> for ExpnIndex {
131 fn encode(&self, s: &mut EncodeContext<'a, 'tcx>) {
132 s.emit_u32(self.as_u32());
133 }
134}
135
136impl<'a, 'tcx> SpanEncoder for EncodeContext<'a, 'tcx> {
137 fn encode_crate_num(&mut self, crate_num: CrateNum) {
138 if crate_num != LOCAL_CRATE && self.is_proc_macro {
139 panic!("Attempted to encode non-local CrateNum {crate_num:?} for proc-macro crate");
140 }
141 self.emit_u32(crate_num.as_u32());
142 }
143
144 fn encode_def_index(&mut self, def_index: DefIndex) {
145 self.emit_u32(def_index.as_u32());
146 }
147
148 fn encode_def_id(&mut self, def_id: DefId) {
149 def_id.krate.encode(self);
150 def_id.index.encode(self);
151 }
152
153 fn encode_syntax_context(&mut self, syntax_context: SyntaxContext) {
154 rustc_span::hygiene::raw_encode_syntax_context(syntax_context, self.hygiene_ctxt, self);
155 }
156
157 fn encode_expn_id(&mut self, expn_id: ExpnId) {
158 if expn_id.krate == LOCAL_CRATE {
159 self.hygiene_ctxt.schedule_expn_data_for_encoding(expn_id);
164 }
165 expn_id.krate.encode(self);
166 expn_id.local_id.encode(self);
167 }
168
169 fn encode_span(&mut self, span: Span) {
170 match self.span_shorthands.entry(span) {
171 Entry::Occupied(o) => {
172 let last_location = *o.get();
175 let offset = self.opaque.position() - last_location;
178 if offset < last_location {
179 let needed = bytes_needed(offset);
180 SpanTag::indirect(true, needed as u8).encode(self);
181 self.opaque.write_with(|dest| {
182 *dest = offset.to_le_bytes();
183 needed
184 });
185 } else {
186 let needed = bytes_needed(last_location);
187 SpanTag::indirect(false, needed as u8).encode(self);
188 self.opaque.write_with(|dest| {
189 *dest = last_location.to_le_bytes();
190 needed
191 });
192 }
193 }
194 Entry::Vacant(v) => {
195 let position = self.opaque.position();
196 v.insert(position);
197 span.data().encode(self);
199 }
200 }
201 }
202
203 fn encode_symbol(&mut self, symbol: Symbol) {
204 if symbol.is_predefined() {
206 self.opaque.emit_u8(SYMBOL_PREDEFINED);
207 self.opaque.emit_u32(symbol.as_u32());
208 } else {
209 match self.symbol_table.entry(symbol) {
211 Entry::Vacant(o) => {
212 self.opaque.emit_u8(SYMBOL_STR);
213 let pos = self.opaque.position();
214 o.insert(pos);
215 self.emit_str(symbol.as_str());
216 }
217 Entry::Occupied(o) => {
218 let x = *o.get();
219 self.emit_u8(SYMBOL_OFFSET);
220 self.emit_usize(x);
221 }
222 }
223 }
224 }
225}
226
227fn bytes_needed(n: usize) -> usize {
228 (usize::BITS - n.leading_zeros()).div_ceil(u8::BITS) as usize
229}
230
231impl<'a, 'tcx> Encodable<EncodeContext<'a, 'tcx>> for SpanData {
232 fn encode(&self, s: &mut EncodeContext<'a, 'tcx>) {
233 let ctxt = if s.is_proc_macro { SyntaxContext::root() } else { self.ctxt };
265
266 if self.is_dummy() {
267 let tag = SpanTag::new(SpanKind::Partial, ctxt, 0);
268 tag.encode(s);
269 if tag.context().is_none() {
270 ctxt.encode(s);
271 }
272 return;
273 }
274
275 debug_assert!(self.lo <= self.hi);
277
278 if !s.source_file_cache.0.contains(self.lo) {
279 let source_map = s.tcx.sess.source_map();
280 let source_file_index = source_map.lookup_source_file_idx(self.lo);
281 s.source_file_cache =
282 (Arc::clone(&source_map.files()[source_file_index]), source_file_index);
283 }
284 let (ref source_file, source_file_index) = s.source_file_cache;
285 debug_assert!(source_file.contains(self.lo));
286
287 if !source_file.contains(self.hi) {
288 let tag = SpanTag::new(SpanKind::Partial, ctxt, 0);
291 tag.encode(s);
292 if tag.context().is_none() {
293 ctxt.encode(s);
294 }
295 return;
296 }
297
298 let (kind, metadata_index) = if source_file.is_imported() && !s.is_proc_macro {
315 let metadata_index = {
325 match &*source_file.external_src.read() {
327 ExternalSource::Foreign { metadata_index, .. } => *metadata_index,
328 src => panic!("Unexpected external source {src:?}"),
329 }
330 };
331
332 (SpanKind::Foreign, metadata_index)
333 } else {
334 let source_files =
336 s.required_source_files.as_mut().expect("Already encoded SourceMap!");
337 let (metadata_index, _) = source_files.insert_full(source_file_index);
338 let metadata_index: u32 =
339 metadata_index.try_into().expect("cannot export more than U32_MAX files");
340
341 (SpanKind::Local, metadata_index)
342 };
343
344 let lo = self.lo - source_file.start_pos;
347
348 let len = self.hi - self.lo;
351
352 let tag = SpanTag::new(kind, ctxt, len.0 as usize);
353 tag.encode(s);
354 if tag.context().is_none() {
355 ctxt.encode(s);
356 }
357 lo.encode(s);
358 if tag.length().is_none() {
359 len.encode(s);
360 }
361
362 metadata_index.encode(s);
364
365 if kind == SpanKind::Foreign {
366 let cnum = s.source_file_cache.0.cnum;
369 cnum.encode(s);
370 }
371 }
372}
373
374impl<'a, 'tcx> Encodable<EncodeContext<'a, 'tcx>> for [u8] {
375 fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
376 Encoder::emit_usize(e, self.len());
377 e.emit_raw_bytes(self);
378 }
379}
380
381impl<'a, 'tcx> TyEncoder<'tcx> for EncodeContext<'a, 'tcx> {
382 const CLEAR_CROSS_CRATE: bool = true;
383
384 fn position(&self) -> usize {
385 self.opaque.position()
386 }
387
388 fn type_shorthands(&mut self) -> &mut FxHashMap<Ty<'tcx>, usize> {
389 &mut self.type_shorthands
390 }
391
392 fn predicate_shorthands(&mut self) -> &mut FxHashMap<ty::PredicateKind<'tcx>, usize> {
393 &mut self.predicate_shorthands
394 }
395
396 fn encode_alloc_id(&mut self, alloc_id: &rustc_middle::mir::interpret::AllocId) {
397 let (index, _) = self.interpret_allocs.insert_full(*alloc_id);
398
399 index.encode(self);
400 }
401}
402
403macro_rules! record {
406 ($self:ident.$tables:ident.$table:ident[$def_id:expr] <- $value:expr) => {{
407 {
408 let value = $value;
409 let lazy = $self.lazy(value);
410 $self.$tables.$table.set_some($def_id.index, lazy);
411 }
412 }};
413}
414
415macro_rules! record_array {
418 ($self:ident.$tables:ident.$table:ident[$def_id:expr] <- $value:expr) => {{
419 {
420 let value = $value;
421 let lazy = $self.lazy_array(value);
422 $self.$tables.$table.set_some($def_id.index, lazy);
423 }
424 }};
425}
426
427macro_rules! record_defaulted_array {
428 ($self:ident.$tables:ident.$table:ident[$def_id:expr] <- $value:expr) => {{
429 {
430 let value = $value;
431 let lazy = $self.lazy_array(value);
432 $self.$tables.$table.set($def_id.index, lazy);
433 }
434 }};
435}
436
437impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
438 fn emit_lazy_distance(&mut self, position: NonZero<usize>) {
439 let pos = position.get();
440 let distance = match self.lazy_state {
441 LazyState::NoNode => bug!("emit_lazy_distance: outside of a metadata node"),
442 LazyState::NodeStart(start) => {
443 let start = start.get();
444 assert!(pos <= start);
445 start - pos
446 }
447 LazyState::Previous(last_pos) => {
448 assert!(
449 last_pos <= position,
450 "make sure that the calls to `lazy*` \
451 are in the same order as the metadata fields",
452 );
453 position.get() - last_pos.get()
454 }
455 };
456 self.lazy_state = LazyState::Previous(NonZero::new(pos).unwrap());
457 self.emit_usize(distance);
458 }
459
460 fn lazy<T: ParameterizedOverTcx, B: Borrow<T::Value<'tcx>>>(&mut self, value: B) -> LazyValue<T>
461 where
462 T::Value<'tcx>: Encodable<EncodeContext<'a, 'tcx>>,
463 {
464 let pos = NonZero::new(self.position()).unwrap();
465
466 assert_eq!(self.lazy_state, LazyState::NoNode);
467 self.lazy_state = LazyState::NodeStart(pos);
468 value.borrow().encode(self);
469 self.lazy_state = LazyState::NoNode;
470
471 assert!(pos.get() <= self.position());
472
473 LazyValue::from_position(pos)
474 }
475
476 fn lazy_array<T: ParameterizedOverTcx, I: IntoIterator<Item = B>, B: Borrow<T::Value<'tcx>>>(
477 &mut self,
478 values: I,
479 ) -> LazyArray<T>
480 where
481 T::Value<'tcx>: Encodable<EncodeContext<'a, 'tcx>>,
482 {
483 let pos = NonZero::new(self.position()).unwrap();
484
485 assert_eq!(self.lazy_state, LazyState::NoNode);
486 self.lazy_state = LazyState::NodeStart(pos);
487 let len = values.into_iter().map(|value| value.borrow().encode(self)).count();
488 self.lazy_state = LazyState::NoNode;
489
490 assert!(pos.get() <= self.position());
491
492 LazyArray::from_position_and_num_elems(pos, len)
493 }
494
495 fn encode_def_path_table(&mut self) {
496 let table = self.tcx.def_path_table();
497 if self.is_proc_macro {
498 for def_index in std::iter::once(CRATE_DEF_INDEX)
499 .chain(self.tcx.resolutions(()).proc_macros.iter().map(|p| p.local_def_index))
500 {
501 let def_key = self.lazy(table.def_key(def_index));
502 let def_path_hash = table.def_path_hash(def_index);
503 self.tables.def_keys.set_some(def_index, def_key);
504 self.tables.def_path_hashes.set(def_index, def_path_hash.local_hash().as_u64());
505 }
506 } else {
507 for (def_index, def_key, def_path_hash) in table.enumerated_keys_and_path_hashes() {
508 let def_key = self.lazy(def_key);
509 self.tables.def_keys.set_some(def_index, def_key);
510 self.tables.def_path_hashes.set(def_index, def_path_hash.local_hash().as_u64());
511 }
512 }
513 }
514
515 fn encode_def_path_hash_map(&mut self) -> LazyValue<DefPathHashMapRef<'static>> {
516 self.lazy(DefPathHashMapRef::BorrowedFromTcx(self.tcx.def_path_hash_to_def_index_map()))
517 }
518
519 fn encode_source_map(&mut self) -> LazyTable<u32, Option<LazyValue<rustc_span::SourceFile>>> {
520 let source_map = self.tcx.sess.source_map();
521 let all_source_files = source_map.files();
522
523 let required_source_files = self.required_source_files.take().unwrap();
527
528 let working_directory = &self.tcx.sess.opts.working_dir;
529
530 let mut adapted = TableBuilder::default();
531
532 let local_crate_stable_id = self.tcx.stable_crate_id(LOCAL_CRATE);
533
534 for (on_disk_index, &source_file_index) in required_source_files.iter().enumerate() {
539 let source_file = &all_source_files[source_file_index];
540 assert!(!source_file.is_imported() || self.is_proc_macro);
542
543 let mut adapted_source_file = (**source_file).clone();
551
552 match source_file.name {
553 FileName::Real(ref original_file_name) => {
554 let adapted_file_name = source_map
555 .path_mapping()
556 .to_embeddable_absolute_path(original_file_name.clone(), working_directory);
557
558 adapted_source_file.name = FileName::Real(adapted_file_name);
559 }
560 _ => {
561 }
563 };
564
565 if self.is_proc_macro {
572 adapted_source_file.cnum = LOCAL_CRATE;
573 }
574
575 adapted_source_file.stable_id = StableSourceFileId::from_filename_for_export(
579 &adapted_source_file.name,
580 local_crate_stable_id,
581 );
582
583 let on_disk_index: u32 =
584 on_disk_index.try_into().expect("cannot export more than U32_MAX files");
585 adapted.set_some(on_disk_index, self.lazy(adapted_source_file));
586 }
587
588 adapted.encode(&mut self.opaque)
589 }
590
591 fn encode_crate_root(&mut self) -> LazyValue<CrateRoot> {
592 let tcx = self.tcx;
593 let mut stats: Vec<(&'static str, usize)> = Vec::with_capacity(32);
594
595 macro_rules! stat {
596 ($label:literal, $f:expr) => {{
597 let orig_pos = self.position();
598 let res = $f();
599 stats.push(($label, self.position() - orig_pos));
600 res
601 }};
602 }
603
604 stats.push(("preamble", self.position()));
606
607 let (crate_deps, dylib_dependency_formats) =
608 stat!("dep", || (self.encode_crate_deps(), self.encode_dylib_dependency_formats()));
609
610 let lib_features = stat!("lib-features", || self.encode_lib_features());
611
612 let stability_implications =
613 stat!("stability-implications", || self.encode_stability_implications());
614
615 let (lang_items, lang_items_missing) = stat!("lang-items", || {
616 (self.encode_lang_items(), self.encode_lang_items_missing())
617 });
618
619 let stripped_cfg_items = stat!("stripped-cfg-items", || self.encode_stripped_cfg_items());
620
621 let diagnostic_items = stat!("diagnostic-items", || self.encode_diagnostic_items());
622
623 let native_libraries = stat!("native-libs", || self.encode_native_libraries());
624
625 let foreign_modules = stat!("foreign-modules", || self.encode_foreign_modules());
626
627 _ = stat!("def-path-table", || self.encode_def_path_table());
628
629 let traits = stat!("traits", || self.encode_traits());
631
632 let impls = stat!("impls", || self.encode_impls());
634
635 let incoherent_impls = stat!("incoherent-impls", || self.encode_incoherent_impls());
636
637 _ = stat!("mir", || self.encode_mir());
638
639 _ = stat!("def-ids", || self.encode_def_ids());
640
641 let interpret_alloc_index = stat!("interpret-alloc-index", || {
642 let mut interpret_alloc_index = Vec::new();
643 let mut n = 0;
644 trace!("beginning to encode alloc ids");
645 loop {
646 let new_n = self.interpret_allocs.len();
647 if n == new_n {
649 break;
651 }
652 trace!("encoding {} further alloc ids", new_n - n);
653 for idx in n..new_n {
654 let id = self.interpret_allocs[idx];
655 let pos = self.position() as u64;
656 interpret_alloc_index.push(pos);
657 interpret::specialized_encode_alloc_id(self, tcx, id);
658 }
659 n = new_n;
660 }
661 self.lazy_array(interpret_alloc_index)
662 });
663
664 let proc_macro_data = stat!("proc-macro-data", || self.encode_proc_macros());
668
669 let tables = stat!("tables", || self.tables.encode(&mut self.opaque));
670
671 let debugger_visualizers =
672 stat!("debugger-visualizers", || self.encode_debugger_visualizers());
673
674 let exportable_items = stat!("exportable-items", || self.encode_exportable_items());
675
676 let stable_order_of_exportable_impls =
677 stat!("exportable-items", || self.encode_stable_order_of_exportable_impls());
678
679 let exported_symbols = stat!("exported-symbols", || {
681 self.encode_exported_symbols(tcx.exported_symbols(LOCAL_CRATE))
682 });
683
684 let (syntax_contexts, expn_data, expn_hashes) = stat!("hygiene", || self.encode_hygiene());
691
692 let def_path_hash_map = stat!("def-path-hash-map", || self.encode_def_path_hash_map());
693
694 let source_map = stat!("source-map", || self.encode_source_map());
697 let target_modifiers = stat!("target-modifiers", || self.encode_target_modifiers());
698
699 let root = stat!("final", || {
700 let attrs = tcx.hir_krate_attrs();
701 self.lazy(CrateRoot {
702 header: CrateHeader {
703 name: tcx.crate_name(LOCAL_CRATE),
704 triple: tcx.sess.opts.target_triple.clone(),
705 hash: tcx.crate_hash(LOCAL_CRATE),
706 is_proc_macro_crate: proc_macro_data.is_some(),
707 is_stub: false,
708 },
709 extra_filename: tcx.sess.opts.cg.extra_filename.clone(),
710 stable_crate_id: tcx.def_path_hash(LOCAL_CRATE.as_def_id()).stable_crate_id(),
711 required_panic_strategy: tcx.required_panic_strategy(LOCAL_CRATE),
712 panic_in_drop_strategy: tcx.sess.opts.unstable_opts.panic_in_drop,
713 edition: tcx.sess.edition(),
714 has_global_allocator: tcx.has_global_allocator(LOCAL_CRATE),
715 has_alloc_error_handler: tcx.has_alloc_error_handler(LOCAL_CRATE),
716 has_panic_handler: tcx.has_panic_handler(LOCAL_CRATE),
717 has_default_lib_allocator: ast::attr::contains_name(
718 attrs,
719 sym::default_lib_allocator,
720 ),
721 proc_macro_data,
722 debugger_visualizers,
723 compiler_builtins: ast::attr::contains_name(attrs, sym::compiler_builtins),
724 needs_allocator: ast::attr::contains_name(attrs, sym::needs_allocator),
725 needs_panic_runtime: ast::attr::contains_name(attrs, sym::needs_panic_runtime),
726 no_builtins: ast::attr::contains_name(attrs, sym::no_builtins),
727 panic_runtime: ast::attr::contains_name(attrs, sym::panic_runtime),
728 profiler_runtime: ast::attr::contains_name(attrs, sym::profiler_runtime),
729 symbol_mangling_version: tcx.sess.opts.get_symbol_mangling_version(),
730
731 crate_deps,
732 dylib_dependency_formats,
733 lib_features,
734 stability_implications,
735 lang_items,
736 diagnostic_items,
737 lang_items_missing,
738 stripped_cfg_items,
739 native_libraries,
740 foreign_modules,
741 source_map,
742 target_modifiers,
743 traits,
744 impls,
745 incoherent_impls,
746 exportable_items,
747 stable_order_of_exportable_impls,
748 exported_symbols,
749 interpret_alloc_index,
750 tables,
751 syntax_contexts,
752 expn_data,
753 expn_hashes,
754 def_path_hash_map,
755 specialization_enabled_in: tcx.specialization_enabled_in(LOCAL_CRATE),
756 })
757 });
758
759 let total_bytes = self.position();
760
761 let computed_total_bytes: usize = stats.iter().map(|(_, size)| size).sum();
762 assert_eq!(total_bytes, computed_total_bytes);
763
764 if tcx.sess.opts.unstable_opts.meta_stats {
765 self.opaque.flush();
766
767 let pos_before_rewind = self.opaque.file().stream_position().unwrap();
769 let mut zero_bytes = 0;
770 self.opaque.file().rewind().unwrap();
771 let file = std::io::BufReader::new(self.opaque.file());
772 for e in file.bytes() {
773 if e.unwrap() == 0 {
774 zero_bytes += 1;
775 }
776 }
777 assert_eq!(self.opaque.file().stream_position().unwrap(), pos_before_rewind);
778
779 stats.sort_by_key(|&(_, usize)| usize);
780
781 let prefix = "meta-stats";
782 let perc = |bytes| (bytes * 100) as f64 / total_bytes as f64;
783
784 eprintln!("{prefix} METADATA STATS");
785 eprintln!("{} {:<23}{:>10}", prefix, "Section", "Size");
786 eprintln!("{prefix} ----------------------------------------------------------------");
787 for (label, size) in stats {
788 eprintln!(
789 "{} {:<23}{:>10} ({:4.1}%)",
790 prefix,
791 label,
792 format_with_underscores(size),
793 perc(size)
794 );
795 }
796 eprintln!("{prefix} ----------------------------------------------------------------");
797 eprintln!(
798 "{} {:<23}{:>10} (of which {:.1}% are zero bytes)",
799 prefix,
800 "Total",
801 format_with_underscores(total_bytes),
802 perc(zero_bytes)
803 );
804 eprintln!("{prefix}");
805 }
806
807 root
808 }
809}
810
811struct AnalyzeAttrState<'a> {
812 is_exported: bool,
813 is_doc_hidden: bool,
814 features: &'a Features,
815}
816
817#[inline]
827fn analyze_attr(attr: &impl AttributeExt, state: &mut AnalyzeAttrState<'_>) -> bool {
828 let mut should_encode = false;
829 if let Some(name) = attr.name()
830 && !rustc_feature::encode_cross_crate(name)
831 {
832 } else if attr.doc_str().is_some() {
834 if state.is_exported {
838 should_encode = true;
839 }
840 } else if attr.has_name(sym::doc) {
841 if let Some(item_list) = attr.meta_item_list() {
844 for item in item_list {
845 if !item.has_name(sym::inline) {
846 should_encode = true;
847 if item.has_name(sym::hidden) {
848 state.is_doc_hidden = true;
849 break;
850 }
851 }
852 }
853 }
854 } else if let &[sym::diagnostic, seg] = &*attr.path() {
855 should_encode = rustc_feature::is_stable_diagnostic_attribute(seg, state.features);
856 } else {
857 should_encode = true;
858 }
859 should_encode
860}
861
862fn should_encode_span(def_kind: DefKind) -> bool {
863 match def_kind {
864 DefKind::Mod
865 | DefKind::Struct
866 | DefKind::Union
867 | DefKind::Enum
868 | DefKind::Variant
869 | DefKind::Trait
870 | DefKind::TyAlias
871 | DefKind::ForeignTy
872 | DefKind::TraitAlias
873 | DefKind::AssocTy
874 | DefKind::TyParam
875 | DefKind::ConstParam
876 | DefKind::LifetimeParam
877 | DefKind::Fn
878 | DefKind::Const
879 | DefKind::Static { .. }
880 | DefKind::Ctor(..)
881 | DefKind::AssocFn
882 | DefKind::AssocConst
883 | DefKind::Macro(_)
884 | DefKind::ExternCrate
885 | DefKind::Use
886 | DefKind::AnonConst
887 | DefKind::InlineConst
888 | DefKind::OpaqueTy
889 | DefKind::Field
890 | DefKind::Impl { .. }
891 | DefKind::Closure
892 | DefKind::SyntheticCoroutineBody => true,
893 DefKind::ForeignMod | DefKind::GlobalAsm => false,
894 }
895}
896
897fn should_encode_attrs(def_kind: DefKind) -> bool {
898 match def_kind {
899 DefKind::Mod
900 | DefKind::Struct
901 | DefKind::Union
902 | DefKind::Enum
903 | DefKind::Variant
904 | DefKind::Trait
905 | DefKind::TyAlias
906 | DefKind::ForeignTy
907 | DefKind::TraitAlias
908 | DefKind::AssocTy
909 | DefKind::Fn
910 | DefKind::Const
911 | DefKind::Static { nested: false, .. }
912 | DefKind::AssocFn
913 | DefKind::AssocConst
914 | DefKind::Macro(_)
915 | DefKind::Field
916 | DefKind::Impl { .. } => true,
917 DefKind::Closure => true,
922 DefKind::SyntheticCoroutineBody => false,
923 DefKind::TyParam
924 | DefKind::ConstParam
925 | DefKind::Ctor(..)
926 | DefKind::ExternCrate
927 | DefKind::Use
928 | DefKind::ForeignMod
929 | DefKind::AnonConst
930 | DefKind::InlineConst
931 | DefKind::OpaqueTy
932 | DefKind::LifetimeParam
933 | DefKind::Static { nested: true, .. }
934 | DefKind::GlobalAsm => false,
935 }
936}
937
938fn should_encode_expn_that_defined(def_kind: DefKind) -> bool {
939 match def_kind {
940 DefKind::Mod
941 | DefKind::Struct
942 | DefKind::Union
943 | DefKind::Enum
944 | DefKind::Variant
945 | DefKind::Trait
946 | DefKind::Impl { .. } => true,
947 DefKind::TyAlias
948 | DefKind::ForeignTy
949 | DefKind::TraitAlias
950 | DefKind::AssocTy
951 | DefKind::TyParam
952 | DefKind::Fn
953 | DefKind::Const
954 | DefKind::ConstParam
955 | DefKind::Static { .. }
956 | DefKind::Ctor(..)
957 | DefKind::AssocFn
958 | DefKind::AssocConst
959 | DefKind::Macro(_)
960 | DefKind::ExternCrate
961 | DefKind::Use
962 | DefKind::ForeignMod
963 | DefKind::AnonConst
964 | DefKind::InlineConst
965 | DefKind::OpaqueTy
966 | DefKind::Field
967 | DefKind::LifetimeParam
968 | DefKind::GlobalAsm
969 | DefKind::Closure
970 | DefKind::SyntheticCoroutineBody => false,
971 }
972}
973
974fn should_encode_visibility(def_kind: DefKind) -> bool {
975 match def_kind {
976 DefKind::Mod
977 | DefKind::Struct
978 | DefKind::Union
979 | DefKind::Enum
980 | DefKind::Variant
981 | DefKind::Trait
982 | DefKind::TyAlias
983 | DefKind::ForeignTy
984 | DefKind::TraitAlias
985 | DefKind::AssocTy
986 | DefKind::Fn
987 | DefKind::Const
988 | DefKind::Static { nested: false, .. }
989 | DefKind::Ctor(..)
990 | DefKind::AssocFn
991 | DefKind::AssocConst
992 | DefKind::Macro(..)
993 | DefKind::Field => true,
994 DefKind::Use
995 | DefKind::ForeignMod
996 | DefKind::TyParam
997 | DefKind::ConstParam
998 | DefKind::LifetimeParam
999 | DefKind::AnonConst
1000 | DefKind::InlineConst
1001 | DefKind::Static { nested: true, .. }
1002 | DefKind::OpaqueTy
1003 | DefKind::GlobalAsm
1004 | DefKind::Impl { .. }
1005 | DefKind::Closure
1006 | DefKind::ExternCrate
1007 | DefKind::SyntheticCoroutineBody => false,
1008 }
1009}
1010
1011fn should_encode_stability(def_kind: DefKind) -> bool {
1012 match def_kind {
1013 DefKind::Mod
1014 | DefKind::Ctor(..)
1015 | DefKind::Variant
1016 | DefKind::Field
1017 | DefKind::Struct
1018 | DefKind::AssocTy
1019 | DefKind::AssocFn
1020 | DefKind::AssocConst
1021 | DefKind::TyParam
1022 | DefKind::ConstParam
1023 | DefKind::Static { .. }
1024 | DefKind::Const
1025 | DefKind::Fn
1026 | DefKind::ForeignMod
1027 | DefKind::TyAlias
1028 | DefKind::OpaqueTy
1029 | DefKind::Enum
1030 | DefKind::Union
1031 | DefKind::Impl { .. }
1032 | DefKind::Trait
1033 | DefKind::TraitAlias
1034 | DefKind::Macro(..)
1035 | DefKind::ForeignTy => true,
1036 DefKind::Use
1037 | DefKind::LifetimeParam
1038 | DefKind::AnonConst
1039 | DefKind::InlineConst
1040 | DefKind::GlobalAsm
1041 | DefKind::Closure
1042 | DefKind::ExternCrate
1043 | DefKind::SyntheticCoroutineBody => false,
1044 }
1045}
1046
1047fn should_encode_mir(
1068 tcx: TyCtxt<'_>,
1069 reachable_set: &LocalDefIdSet,
1070 def_id: LocalDefId,
1071) -> (bool, bool) {
1072 match tcx.def_kind(def_id) {
1073 DefKind::Ctor(_, _) => {
1075 let mir_opt_base = tcx.sess.opts.output_types.should_codegen()
1076 || tcx.sess.opts.unstable_opts.always_encode_mir;
1077 (true, mir_opt_base)
1078 }
1079 DefKind::AnonConst | DefKind::InlineConst | DefKind::AssocConst | DefKind::Const => {
1081 (true, false)
1082 }
1083 DefKind::Closure if tcx.is_coroutine(def_id.to_def_id()) => (false, true),
1085 DefKind::SyntheticCoroutineBody => (false, true),
1086 DefKind::AssocFn | DefKind::Fn | DefKind::Closure => {
1088 let generics = tcx.generics_of(def_id);
1089 let opt = tcx.sess.opts.unstable_opts.always_encode_mir
1090 || (tcx.sess.opts.output_types.should_codegen()
1091 && reachable_set.contains(&def_id)
1092 && (generics.requires_monomorphization(tcx)
1093 || tcx.cross_crate_inlinable(def_id)));
1094 let is_const_fn = tcx.is_const_fn(def_id.to_def_id())
1096 || tcx.is_const_default_method(def_id.to_def_id());
1097 (is_const_fn, opt)
1098 }
1099 _ => (false, false),
1101 }
1102}
1103
1104fn should_encode_variances<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId, def_kind: DefKind) -> bool {
1105 match def_kind {
1106 DefKind::Struct
1107 | DefKind::Union
1108 | DefKind::Enum
1109 | DefKind::OpaqueTy
1110 | DefKind::Fn
1111 | DefKind::Ctor(..)
1112 | DefKind::AssocFn => true,
1113 DefKind::AssocTy => {
1114 matches!(tcx.opt_rpitit_info(def_id), Some(ty::ImplTraitInTraitData::Trait { .. }))
1116 }
1117 DefKind::Mod
1118 | DefKind::Variant
1119 | DefKind::Field
1120 | DefKind::AssocConst
1121 | DefKind::TyParam
1122 | DefKind::ConstParam
1123 | DefKind::Static { .. }
1124 | DefKind::Const
1125 | DefKind::ForeignMod
1126 | DefKind::Impl { .. }
1127 | DefKind::Trait
1128 | DefKind::TraitAlias
1129 | DefKind::Macro(..)
1130 | DefKind::ForeignTy
1131 | DefKind::Use
1132 | DefKind::LifetimeParam
1133 | DefKind::AnonConst
1134 | DefKind::InlineConst
1135 | DefKind::GlobalAsm
1136 | DefKind::Closure
1137 | DefKind::ExternCrate
1138 | DefKind::SyntheticCoroutineBody => false,
1139 DefKind::TyAlias => tcx.type_alias_is_lazy(def_id),
1140 }
1141}
1142
1143fn should_encode_generics(def_kind: DefKind) -> bool {
1144 match def_kind {
1145 DefKind::Struct
1146 | DefKind::Union
1147 | DefKind::Enum
1148 | DefKind::Variant
1149 | DefKind::Trait
1150 | DefKind::TyAlias
1151 | DefKind::ForeignTy
1152 | DefKind::TraitAlias
1153 | DefKind::AssocTy
1154 | DefKind::Fn
1155 | DefKind::Const
1156 | DefKind::Static { .. }
1157 | DefKind::Ctor(..)
1158 | DefKind::AssocFn
1159 | DefKind::AssocConst
1160 | DefKind::AnonConst
1161 | DefKind::InlineConst
1162 | DefKind::OpaqueTy
1163 | DefKind::Impl { .. }
1164 | DefKind::Field
1165 | DefKind::TyParam
1166 | DefKind::Closure
1167 | DefKind::SyntheticCoroutineBody => true,
1168 DefKind::Mod
1169 | DefKind::ForeignMod
1170 | DefKind::ConstParam
1171 | DefKind::Macro(..)
1172 | DefKind::Use
1173 | DefKind::LifetimeParam
1174 | DefKind::GlobalAsm
1175 | DefKind::ExternCrate => false,
1176 }
1177}
1178
1179fn should_encode_type(tcx: TyCtxt<'_>, def_id: LocalDefId, def_kind: DefKind) -> bool {
1180 match def_kind {
1181 DefKind::Struct
1182 | DefKind::Union
1183 | DefKind::Enum
1184 | DefKind::Variant
1185 | DefKind::Ctor(..)
1186 | DefKind::Field
1187 | DefKind::Fn
1188 | DefKind::Const
1189 | DefKind::Static { nested: false, .. }
1190 | DefKind::TyAlias
1191 | DefKind::ForeignTy
1192 | DefKind::Impl { .. }
1193 | DefKind::AssocFn
1194 | DefKind::AssocConst
1195 | DefKind::Closure
1196 | DefKind::ConstParam
1197 | DefKind::AnonConst
1198 | DefKind::InlineConst
1199 | DefKind::SyntheticCoroutineBody => true,
1200
1201 DefKind::OpaqueTy => {
1202 let origin = tcx.local_opaque_ty_origin(def_id);
1203 if let hir::OpaqueTyOrigin::FnReturn { parent, .. }
1204 | hir::OpaqueTyOrigin::AsyncFn { parent, .. } = origin
1205 && let hir::Node::TraitItem(trait_item) = tcx.hir_node_by_def_id(parent)
1206 && let (_, hir::TraitFn::Required(..)) = trait_item.expect_fn()
1207 {
1208 false
1209 } else {
1210 true
1211 }
1212 }
1213
1214 DefKind::AssocTy => {
1215 let assoc_item = tcx.associated_item(def_id);
1216 match assoc_item.container {
1217 ty::AssocItemContainer::Impl => true,
1218 ty::AssocItemContainer::Trait => assoc_item.defaultness(tcx).has_value(),
1219 }
1220 }
1221 DefKind::TyParam => {
1222 let hir::Node::GenericParam(param) = tcx.hir_node_by_def_id(def_id) else { bug!() };
1223 let hir::GenericParamKind::Type { default, .. } = param.kind else { bug!() };
1224 default.is_some()
1225 }
1226
1227 DefKind::Trait
1228 | DefKind::TraitAlias
1229 | DefKind::Mod
1230 | DefKind::ForeignMod
1231 | DefKind::Macro(..)
1232 | DefKind::Static { nested: true, .. }
1233 | DefKind::Use
1234 | DefKind::LifetimeParam
1235 | DefKind::GlobalAsm
1236 | DefKind::ExternCrate => false,
1237 }
1238}
1239
1240fn should_encode_fn_sig(def_kind: DefKind) -> bool {
1241 match def_kind {
1242 DefKind::Fn | DefKind::AssocFn | DefKind::Ctor(_, CtorKind::Fn) => true,
1243
1244 DefKind::Struct
1245 | DefKind::Union
1246 | DefKind::Enum
1247 | DefKind::Variant
1248 | DefKind::Field
1249 | DefKind::Const
1250 | DefKind::Static { .. }
1251 | DefKind::Ctor(..)
1252 | DefKind::TyAlias
1253 | DefKind::OpaqueTy
1254 | DefKind::ForeignTy
1255 | DefKind::Impl { .. }
1256 | DefKind::AssocConst
1257 | DefKind::Closure
1258 | DefKind::ConstParam
1259 | DefKind::AnonConst
1260 | DefKind::InlineConst
1261 | DefKind::AssocTy
1262 | DefKind::TyParam
1263 | DefKind::Trait
1264 | DefKind::TraitAlias
1265 | DefKind::Mod
1266 | DefKind::ForeignMod
1267 | DefKind::Macro(..)
1268 | DefKind::Use
1269 | DefKind::LifetimeParam
1270 | DefKind::GlobalAsm
1271 | DefKind::ExternCrate
1272 | DefKind::SyntheticCoroutineBody => false,
1273 }
1274}
1275
1276fn should_encode_constness(def_kind: DefKind) -> bool {
1277 match def_kind {
1278 DefKind::Fn | DefKind::AssocFn | DefKind::Closure | DefKind::Ctor(_, CtorKind::Fn) => true,
1279
1280 DefKind::Struct
1281 | DefKind::Union
1282 | DefKind::Enum
1283 | DefKind::Field
1284 | DefKind::Const
1285 | DefKind::AssocConst
1286 | DefKind::AnonConst
1287 | DefKind::Static { .. }
1288 | DefKind::TyAlias
1289 | DefKind::OpaqueTy
1290 | DefKind::Impl { .. }
1291 | DefKind::ForeignTy
1292 | DefKind::ConstParam
1293 | DefKind::InlineConst
1294 | DefKind::AssocTy
1295 | DefKind::TyParam
1296 | DefKind::Trait
1297 | DefKind::TraitAlias
1298 | DefKind::Mod
1299 | DefKind::ForeignMod
1300 | DefKind::Macro(..)
1301 | DefKind::Use
1302 | DefKind::LifetimeParam
1303 | DefKind::GlobalAsm
1304 | DefKind::ExternCrate
1305 | DefKind::Ctor(_, CtorKind::Const)
1306 | DefKind::Variant
1307 | DefKind::SyntheticCoroutineBody => false,
1308 }
1309}
1310
1311fn should_encode_const(def_kind: DefKind) -> bool {
1312 match def_kind {
1313 DefKind::Const | DefKind::AssocConst | DefKind::AnonConst | DefKind::InlineConst => true,
1314
1315 DefKind::Struct
1316 | DefKind::Union
1317 | DefKind::Enum
1318 | DefKind::Variant
1319 | DefKind::Ctor(..)
1320 | DefKind::Field
1321 | DefKind::Fn
1322 | DefKind::Static { .. }
1323 | DefKind::TyAlias
1324 | DefKind::OpaqueTy
1325 | DefKind::ForeignTy
1326 | DefKind::Impl { .. }
1327 | DefKind::AssocFn
1328 | DefKind::Closure
1329 | DefKind::ConstParam
1330 | DefKind::AssocTy
1331 | DefKind::TyParam
1332 | DefKind::Trait
1333 | DefKind::TraitAlias
1334 | DefKind::Mod
1335 | DefKind::ForeignMod
1336 | DefKind::Macro(..)
1337 | DefKind::Use
1338 | DefKind::LifetimeParam
1339 | DefKind::GlobalAsm
1340 | DefKind::ExternCrate
1341 | DefKind::SyntheticCoroutineBody => false,
1342 }
1343}
1344
1345fn should_encode_fn_impl_trait_in_trait<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> bool {
1346 if let Some(assoc_item) = tcx.opt_associated_item(def_id)
1347 && assoc_item.container == ty::AssocItemContainer::Trait
1348 && assoc_item.is_fn()
1349 {
1350 true
1351 } else {
1352 false
1353 }
1354}
1355
1356impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
1357 fn encode_attrs(&mut self, def_id: LocalDefId) {
1358 let tcx = self.tcx;
1359 let mut state = AnalyzeAttrState {
1360 is_exported: tcx.effective_visibilities(()).is_exported(def_id),
1361 is_doc_hidden: false,
1362 features: &tcx.features(),
1363 };
1364 let attr_iter = tcx
1365 .hir_attrs(tcx.local_def_id_to_hir_id(def_id))
1366 .iter()
1367 .filter(|attr| analyze_attr(*attr, &mut state));
1368
1369 record_array!(self.tables.attributes[def_id.to_def_id()] <- attr_iter);
1370
1371 let mut attr_flags = AttrFlags::empty();
1372 if state.is_doc_hidden {
1373 attr_flags |= AttrFlags::IS_DOC_HIDDEN;
1374 }
1375 self.tables.attr_flags.set(def_id.local_def_index, attr_flags);
1376 }
1377
1378 fn encode_def_ids(&mut self) {
1379 self.encode_info_for_mod(CRATE_DEF_ID);
1380
1381 if self.is_proc_macro {
1384 return;
1385 }
1386
1387 let tcx = self.tcx;
1388
1389 for local_id in tcx.iter_local_def_id() {
1390 let def_id = local_id.to_def_id();
1391 let def_kind = tcx.def_kind(local_id);
1392 self.tables.def_kind.set_some(def_id.index, def_kind);
1393
1394 if def_kind == DefKind::AnonConst
1399 && match tcx.hir_node_by_def_id(local_id) {
1400 hir::Node::ConstArg(hir::ConstArg { kind, .. }) => match kind {
1401 hir::ConstArgKind::Path(..) | hir::ConstArgKind::Infer(..) => true,
1403 hir::ConstArgKind::Anon(..) => false,
1404 },
1405 _ => false,
1406 }
1407 {
1408 continue;
1409 }
1410
1411 if def_kind == DefKind::Field
1412 && let hir::Node::Field(field) = tcx.hir_node_by_def_id(local_id)
1413 && let Some(anon) = field.default
1414 {
1415 record!(self.tables.default_fields[def_id] <- anon.def_id.to_def_id());
1416 }
1417
1418 if should_encode_span(def_kind) {
1419 let def_span = tcx.def_span(local_id);
1420 record!(self.tables.def_span[def_id] <- def_span);
1421 }
1422 if should_encode_attrs(def_kind) {
1423 self.encode_attrs(local_id);
1424 }
1425 if should_encode_expn_that_defined(def_kind) {
1426 record!(self.tables.expn_that_defined[def_id] <- self.tcx.expn_that_defined(def_id));
1427 }
1428 if should_encode_span(def_kind)
1429 && let Some(ident_span) = tcx.def_ident_span(def_id)
1430 {
1431 record!(self.tables.def_ident_span[def_id] <- ident_span);
1432 }
1433 if def_kind.has_codegen_attrs() {
1434 record!(self.tables.codegen_fn_attrs[def_id] <- self.tcx.codegen_fn_attrs(def_id));
1435 }
1436 if should_encode_visibility(def_kind) {
1437 let vis =
1438 self.tcx.local_visibility(local_id).map_id(|def_id| def_id.local_def_index);
1439 record!(self.tables.visibility[def_id] <- vis);
1440 }
1441 if should_encode_stability(def_kind) {
1442 self.encode_stability(def_id);
1443 self.encode_const_stability(def_id);
1444 self.encode_default_body_stability(def_id);
1445 self.encode_deprecation(def_id);
1446 }
1447 if should_encode_variances(tcx, def_id, def_kind) {
1448 let v = self.tcx.variances_of(def_id);
1449 record_array!(self.tables.variances_of[def_id] <- v);
1450 }
1451 if should_encode_fn_sig(def_kind) {
1452 record!(self.tables.fn_sig[def_id] <- tcx.fn_sig(def_id));
1453 }
1454 if should_encode_generics(def_kind) {
1455 let g = tcx.generics_of(def_id);
1456 record!(self.tables.generics_of[def_id] <- g);
1457 record!(self.tables.explicit_predicates_of[def_id] <- self.tcx.explicit_predicates_of(def_id));
1458 let inferred_outlives = self.tcx.inferred_outlives_of(def_id);
1459 record_defaulted_array!(self.tables.inferred_outlives_of[def_id] <- inferred_outlives);
1460
1461 for param in &g.own_params {
1462 if let ty::GenericParamDefKind::Const { has_default: true, .. } = param.kind {
1463 let default = self.tcx.const_param_default(param.def_id);
1464 record!(self.tables.const_param_default[param.def_id] <- default);
1465 }
1466 }
1467 }
1468 if tcx.is_conditionally_const(def_id) {
1469 record!(self.tables.const_conditions[def_id] <- self.tcx.const_conditions(def_id));
1470 }
1471 if should_encode_type(tcx, local_id, def_kind) {
1472 record!(self.tables.type_of[def_id] <- self.tcx.type_of(def_id));
1473 }
1474 if should_encode_constness(def_kind) {
1475 self.tables.constness.set_some(def_id.index, self.tcx.constness(def_id));
1476 }
1477 if let DefKind::Fn | DefKind::AssocFn = def_kind {
1478 self.tables.asyncness.set_some(def_id.index, tcx.asyncness(def_id));
1479 record_array!(self.tables.fn_arg_idents[def_id] <- tcx.fn_arg_idents(def_id));
1480 }
1481 if let Some(name) = tcx.intrinsic(def_id) {
1482 record!(self.tables.intrinsic[def_id] <- name);
1483 }
1484 if let DefKind::TyParam = def_kind {
1485 let default = self.tcx.object_lifetime_default(def_id);
1486 record!(self.tables.object_lifetime_default[def_id] <- default);
1487 }
1488 if let DefKind::Trait = def_kind {
1489 record!(self.tables.trait_def[def_id] <- self.tcx.trait_def(def_id));
1490 record_defaulted_array!(self.tables.explicit_super_predicates_of[def_id] <-
1491 self.tcx.explicit_super_predicates_of(def_id).skip_binder());
1492 record_defaulted_array!(self.tables.explicit_implied_predicates_of[def_id] <-
1493 self.tcx.explicit_implied_predicates_of(def_id).skip_binder());
1494 let module_children = self.tcx.module_children_local(local_id);
1495 record_array!(self.tables.module_children_non_reexports[def_id] <-
1496 module_children.iter().map(|child| child.res.def_id().index));
1497 if self.tcx.is_const_trait(def_id) {
1498 record_defaulted_array!(self.tables.explicit_implied_const_bounds[def_id]
1499 <- self.tcx.explicit_implied_const_bounds(def_id).skip_binder());
1500 }
1501 }
1502 if let DefKind::TraitAlias = def_kind {
1503 record!(self.tables.trait_def[def_id] <- self.tcx.trait_def(def_id));
1504 record_defaulted_array!(self.tables.explicit_super_predicates_of[def_id] <-
1505 self.tcx.explicit_super_predicates_of(def_id).skip_binder());
1506 record_defaulted_array!(self.tables.explicit_implied_predicates_of[def_id] <-
1507 self.tcx.explicit_implied_predicates_of(def_id).skip_binder());
1508 }
1509 if let DefKind::Trait | DefKind::Impl { .. } = def_kind {
1510 let associated_item_def_ids = self.tcx.associated_item_def_ids(def_id);
1511 record_array!(self.tables.associated_item_or_field_def_ids[def_id] <-
1512 associated_item_def_ids.iter().map(|&def_id| {
1513 assert!(def_id.is_local());
1514 def_id.index
1515 })
1516 );
1517 for &def_id in associated_item_def_ids {
1518 self.encode_info_for_assoc_item(def_id);
1519 }
1520 }
1521 if let DefKind::Closure | DefKind::SyntheticCoroutineBody = def_kind
1522 && let Some(coroutine_kind) = self.tcx.coroutine_kind(def_id)
1523 {
1524 self.tables.coroutine_kind.set(def_id.index, Some(coroutine_kind))
1525 }
1526 if def_kind == DefKind::Closure
1527 && tcx.type_of(def_id).skip_binder().is_coroutine_closure()
1528 {
1529 let coroutine_for_closure = self.tcx.coroutine_for_closure(def_id);
1530 self.tables
1531 .coroutine_for_closure
1532 .set_some(def_id.index, coroutine_for_closure.into());
1533
1534 if tcx.needs_coroutine_by_move_body_def_id(coroutine_for_closure) {
1536 self.tables.coroutine_by_move_body_def_id.set_some(
1537 coroutine_for_closure.index,
1538 self.tcx.coroutine_by_move_body_def_id(coroutine_for_closure).into(),
1539 );
1540 }
1541 }
1542 if let DefKind::Static { .. } = def_kind {
1543 if !self.tcx.is_foreign_item(def_id) {
1544 let data = self.tcx.eval_static_initializer(def_id).unwrap();
1545 record!(self.tables.eval_static_initializer[def_id] <- data);
1546 }
1547 }
1548 if let DefKind::Enum | DefKind::Struct | DefKind::Union = def_kind {
1549 self.encode_info_for_adt(local_id);
1550 }
1551 if let DefKind::Mod = def_kind {
1552 self.encode_info_for_mod(local_id);
1553 }
1554 if let DefKind::Macro(_) = def_kind {
1555 self.encode_info_for_macro(local_id);
1556 }
1557 if let DefKind::TyAlias = def_kind {
1558 self.tables
1559 .type_alias_is_lazy
1560 .set(def_id.index, self.tcx.type_alias_is_lazy(def_id));
1561 }
1562 if let DefKind::OpaqueTy = def_kind {
1563 self.encode_explicit_item_bounds(def_id);
1564 self.encode_explicit_item_self_bounds(def_id);
1565 record!(self.tables.opaque_ty_origin[def_id] <- self.tcx.opaque_ty_origin(def_id));
1566 self.encode_precise_capturing_args(def_id);
1567 if tcx.is_conditionally_const(def_id) {
1568 record_defaulted_array!(self.tables.explicit_implied_const_bounds[def_id]
1569 <- tcx.explicit_implied_const_bounds(def_id).skip_binder());
1570 }
1571 }
1572 if let DefKind::AnonConst = def_kind {
1573 record!(self.tables.anon_const_kind[def_id] <- self.tcx.anon_const_kind(def_id));
1574 }
1575 if tcx.impl_method_has_trait_impl_trait_tys(def_id)
1576 && let Ok(table) = self.tcx.collect_return_position_impl_trait_in_trait_tys(def_id)
1577 {
1578 record!(self.tables.trait_impl_trait_tys[def_id] <- table);
1579 }
1580 if should_encode_fn_impl_trait_in_trait(tcx, def_id) {
1581 let table = tcx.associated_types_for_impl_traits_in_associated_fn(def_id);
1582 record_defaulted_array!(self.tables.associated_types_for_impl_traits_in_associated_fn[def_id] <- table);
1583 }
1584 }
1585
1586 for (def_id, impls) in &tcx.crate_inherent_impls(()).0.inherent_impls {
1587 record_defaulted_array!(self.tables.inherent_impls[def_id.to_def_id()] <- impls.iter().map(|def_id| {
1588 assert!(def_id.is_local());
1589 def_id.index
1590 }));
1591 }
1592
1593 for (def_id, res_map) in &tcx.resolutions(()).doc_link_resolutions {
1594 record!(self.tables.doc_link_resolutions[def_id.to_def_id()] <- res_map);
1595 }
1596
1597 for (def_id, traits) in &tcx.resolutions(()).doc_link_traits_in_scope {
1598 record_array!(self.tables.doc_link_traits_in_scope[def_id.to_def_id()] <- traits);
1599 }
1600 }
1601
1602 #[instrument(level = "trace", skip(self))]
1603 fn encode_info_for_adt(&mut self, local_def_id: LocalDefId) {
1604 let def_id = local_def_id.to_def_id();
1605 let tcx = self.tcx;
1606 let adt_def = tcx.adt_def(def_id);
1607 record!(self.tables.repr_options[def_id] <- adt_def.repr());
1608
1609 let params_in_repr = self.tcx.params_in_repr(def_id);
1610 record!(self.tables.params_in_repr[def_id] <- params_in_repr);
1611
1612 if adt_def.is_enum() {
1613 let module_children = tcx.module_children_local(local_def_id);
1614 record_array!(self.tables.module_children_non_reexports[def_id] <-
1615 module_children.iter().map(|child| child.res.def_id().index));
1616 } else {
1617 debug_assert_eq!(adt_def.variants().len(), 1);
1619 debug_assert_eq!(adt_def.non_enum_variant().def_id, def_id);
1620 }
1622
1623 for (idx, variant) in adt_def.variants().iter_enumerated() {
1624 let data = VariantData {
1625 discr: variant.discr,
1626 idx,
1627 ctor: variant.ctor.map(|(kind, def_id)| (kind, def_id.index)),
1628 is_non_exhaustive: variant.is_field_list_non_exhaustive(),
1629 };
1630 record!(self.tables.variant_data[variant.def_id] <- data);
1631
1632 record_array!(self.tables.associated_item_or_field_def_ids[variant.def_id] <- variant.fields.iter().map(|f| {
1633 assert!(f.did.is_local());
1634 f.did.index
1635 }));
1636
1637 for field in &variant.fields {
1638 self.tables.safety.set_some(field.did.index, field.safety);
1639 }
1640
1641 if let Some((CtorKind::Fn, ctor_def_id)) = variant.ctor {
1642 let fn_sig = tcx.fn_sig(ctor_def_id);
1643 record!(self.tables.fn_sig[variant.def_id] <- fn_sig);
1645 }
1646 }
1647
1648 if let Some(destructor) = tcx.adt_destructor(local_def_id) {
1649 record!(self.tables.adt_destructor[def_id] <- destructor);
1650 }
1651
1652 if let Some(destructor) = tcx.adt_async_destructor(local_def_id) {
1653 record!(self.tables.adt_async_destructor[def_id] <- destructor);
1654 }
1655 }
1656
1657 #[instrument(level = "debug", skip(self))]
1658 fn encode_info_for_mod(&mut self, local_def_id: LocalDefId) {
1659 let tcx = self.tcx;
1660 let def_id = local_def_id.to_def_id();
1661
1662 if self.is_proc_macro {
1668 record!(self.tables.expn_that_defined[def_id] <- tcx.expn_that_defined(local_def_id));
1670 } else {
1671 let module_children = tcx.module_children_local(local_def_id);
1672
1673 record_array!(self.tables.module_children_non_reexports[def_id] <-
1674 module_children.iter().filter(|child| child.reexport_chain.is_empty())
1675 .map(|child| child.res.def_id().index));
1676
1677 record_defaulted_array!(self.tables.module_children_reexports[def_id] <-
1678 module_children.iter().filter(|child| !child.reexport_chain.is_empty()));
1679 }
1680 }
1681
1682 fn encode_explicit_item_bounds(&mut self, def_id: DefId) {
1683 debug!("EncodeContext::encode_explicit_item_bounds({:?})", def_id);
1684 let bounds = self.tcx.explicit_item_bounds(def_id).skip_binder();
1685 record_defaulted_array!(self.tables.explicit_item_bounds[def_id] <- bounds);
1686 }
1687
1688 fn encode_explicit_item_self_bounds(&mut self, def_id: DefId) {
1689 debug!("EncodeContext::encode_explicit_item_self_bounds({:?})", def_id);
1690 let bounds = self.tcx.explicit_item_self_bounds(def_id).skip_binder();
1691 record_defaulted_array!(self.tables.explicit_item_self_bounds[def_id] <- bounds);
1692 }
1693
1694 #[instrument(level = "debug", skip(self))]
1695 fn encode_info_for_assoc_item(&mut self, def_id: DefId) {
1696 let tcx = self.tcx;
1697 let item = tcx.associated_item(def_id);
1698
1699 self.tables.defaultness.set_some(def_id.index, item.defaultness(tcx));
1700 self.tables.assoc_container.set_some(def_id.index, item.container);
1701
1702 match item.container {
1703 AssocItemContainer::Trait => {
1704 if item.is_type() {
1705 self.encode_explicit_item_bounds(def_id);
1706 self.encode_explicit_item_self_bounds(def_id);
1707 if tcx.is_conditionally_const(def_id) {
1708 record_defaulted_array!(self.tables.explicit_implied_const_bounds[def_id]
1709 <- self.tcx.explicit_implied_const_bounds(def_id).skip_binder());
1710 }
1711 }
1712 }
1713 AssocItemContainer::Impl => {
1714 if let Some(trait_item_def_id) = item.trait_item_def_id {
1715 self.tables.trait_item_def_id.set_some(def_id.index, trait_item_def_id.into());
1716 }
1717 }
1718 }
1719 if let ty::AssocKind::Type { data: ty::AssocTypeData::Rpitit(rpitit_info) } = item.kind {
1720 record!(self.tables.opt_rpitit_info[def_id] <- rpitit_info);
1721 if matches!(rpitit_info, ty::ImplTraitInTraitData::Trait { .. }) {
1722 record_array!(
1723 self.tables.assumed_wf_types_for_rpitit[def_id]
1724 <- self.tcx.assumed_wf_types_for_rpitit(def_id)
1725 );
1726 self.encode_precise_capturing_args(def_id);
1727 }
1728 }
1729 }
1730
1731 fn encode_precise_capturing_args(&mut self, def_id: DefId) {
1732 let Some(precise_capturing_args) = self.tcx.rendered_precise_capturing_args(def_id) else {
1733 return;
1734 };
1735
1736 record_array!(self.tables.rendered_precise_capturing_args[def_id] <- precise_capturing_args);
1737 }
1738
1739 fn encode_mir(&mut self) {
1740 if self.is_proc_macro {
1741 return;
1742 }
1743
1744 let tcx = self.tcx;
1745 let reachable_set = tcx.reachable_set(());
1746
1747 let keys_and_jobs = tcx.mir_keys(()).iter().filter_map(|&def_id| {
1748 let (encode_const, encode_opt) = should_encode_mir(tcx, reachable_set, def_id);
1749 if encode_const || encode_opt { Some((def_id, encode_const, encode_opt)) } else { None }
1750 });
1751 for (def_id, encode_const, encode_opt) in keys_and_jobs {
1752 debug_assert!(encode_const || encode_opt);
1753
1754 debug!("EntryBuilder::encode_mir({:?})", def_id);
1755 if encode_opt {
1756 record!(self.tables.optimized_mir[def_id.to_def_id()] <- tcx.optimized_mir(def_id));
1757 self.tables
1758 .cross_crate_inlinable
1759 .set(def_id.to_def_id().index, self.tcx.cross_crate_inlinable(def_id));
1760 record!(self.tables.closure_saved_names_of_captured_variables[def_id.to_def_id()]
1761 <- tcx.closure_saved_names_of_captured_variables(def_id));
1762
1763 if self.tcx.is_coroutine(def_id.to_def_id())
1764 && let Some(witnesses) = tcx.mir_coroutine_witnesses(def_id)
1765 {
1766 record!(self.tables.mir_coroutine_witnesses[def_id.to_def_id()] <- witnesses);
1767 }
1768 }
1769 if encode_const {
1770 record!(self.tables.mir_for_ctfe[def_id.to_def_id()] <- tcx.mir_for_ctfe(def_id));
1771
1772 let abstract_const = tcx.thir_abstract_const(def_id);
1774 if let Ok(Some(abstract_const)) = abstract_const {
1775 record!(self.tables.thir_abstract_const[def_id.to_def_id()] <- abstract_const);
1776 }
1777
1778 if should_encode_const(tcx.def_kind(def_id)) {
1779 let qualifs = tcx.mir_const_qualif(def_id);
1780 record!(self.tables.mir_const_qualif[def_id.to_def_id()] <- qualifs);
1781 let body = tcx.hir_maybe_body_owned_by(def_id);
1782 if let Some(body) = body {
1783 let const_data = rendered_const(self.tcx, &body, def_id);
1784 record!(self.tables.rendered_const[def_id.to_def_id()] <- const_data);
1785 }
1786 }
1787 }
1788 record!(self.tables.promoted_mir[def_id.to_def_id()] <- tcx.promoted_mir(def_id));
1789
1790 if self.tcx.is_coroutine(def_id.to_def_id())
1791 && let Some(witnesses) = tcx.mir_coroutine_witnesses(def_id)
1792 {
1793 record!(self.tables.mir_coroutine_witnesses[def_id.to_def_id()] <- witnesses);
1794 }
1795 }
1796
1797 if tcx.sess.opts.output_types.should_codegen()
1801 && tcx.sess.opts.optimize != OptLevel::No
1802 && tcx.sess.opts.incremental.is_none()
1803 {
1804 for &local_def_id in tcx.mir_keys(()) {
1805 if let DefKind::AssocFn | DefKind::Fn = tcx.def_kind(local_def_id) {
1806 record_array!(self.tables.deduced_param_attrs[local_def_id.to_def_id()] <-
1807 self.tcx.deduced_param_attrs(local_def_id.to_def_id()));
1808 }
1809 }
1810 }
1811 }
1812
1813 #[instrument(level = "debug", skip(self))]
1814 fn encode_stability(&mut self, def_id: DefId) {
1815 if self.feat.staged_api() || self.tcx.sess.opts.unstable_opts.force_unstable_if_unmarked {
1818 if let Some(stab) = self.tcx.lookup_stability(def_id) {
1819 record!(self.tables.lookup_stability[def_id] <- stab)
1820 }
1821 }
1822 }
1823
1824 #[instrument(level = "debug", skip(self))]
1825 fn encode_const_stability(&mut self, def_id: DefId) {
1826 if self.feat.staged_api() || self.tcx.sess.opts.unstable_opts.force_unstable_if_unmarked {
1829 if let Some(stab) = self.tcx.lookup_const_stability(def_id) {
1830 record!(self.tables.lookup_const_stability[def_id] <- stab)
1831 }
1832 }
1833 }
1834
1835 #[instrument(level = "debug", skip(self))]
1836 fn encode_default_body_stability(&mut self, def_id: DefId) {
1837 if self.feat.staged_api() || self.tcx.sess.opts.unstable_opts.force_unstable_if_unmarked {
1840 if let Some(stab) = self.tcx.lookup_default_body_stability(def_id) {
1841 record!(self.tables.lookup_default_body_stability[def_id] <- stab)
1842 }
1843 }
1844 }
1845
1846 #[instrument(level = "debug", skip(self))]
1847 fn encode_deprecation(&mut self, def_id: DefId) {
1848 if let Some(depr) = self.tcx.lookup_deprecation(def_id) {
1849 record!(self.tables.lookup_deprecation_entry[def_id] <- depr);
1850 }
1851 }
1852
1853 #[instrument(level = "debug", skip(self))]
1854 fn encode_info_for_macro(&mut self, def_id: LocalDefId) {
1855 let tcx = self.tcx;
1856
1857 let (_, macro_def, _) = tcx.hir_expect_item(def_id).expect_macro();
1858 self.tables.is_macro_rules.set(def_id.local_def_index, macro_def.macro_rules);
1859 record!(self.tables.macro_definition[def_id.to_def_id()] <- &*macro_def.body);
1860 }
1861
1862 fn encode_native_libraries(&mut self) -> LazyArray<NativeLib> {
1863 empty_proc_macro!(self);
1864 let used_libraries = self.tcx.native_libraries(LOCAL_CRATE);
1865 self.lazy_array(used_libraries.iter())
1866 }
1867
1868 fn encode_foreign_modules(&mut self) -> LazyArray<ForeignModule> {
1869 empty_proc_macro!(self);
1870 let foreign_modules = self.tcx.foreign_modules(LOCAL_CRATE);
1871 self.lazy_array(foreign_modules.iter().map(|(_, m)| m).cloned())
1872 }
1873
1874 fn encode_hygiene(&mut self) -> (SyntaxContextTable, ExpnDataTable, ExpnHashTable) {
1875 let mut syntax_contexts: TableBuilder<_, _> = Default::default();
1876 let mut expn_data_table: TableBuilder<_, _> = Default::default();
1877 let mut expn_hash_table: TableBuilder<_, _> = Default::default();
1878
1879 self.hygiene_ctxt.encode(
1880 &mut (&mut *self, &mut syntax_contexts, &mut expn_data_table, &mut expn_hash_table),
1881 |(this, syntax_contexts, _, _), index, ctxt_data| {
1882 syntax_contexts.set_some(index, this.lazy(ctxt_data));
1883 },
1884 |(this, _, expn_data_table, expn_hash_table), index, expn_data, hash| {
1885 if let Some(index) = index.as_local() {
1886 expn_data_table.set_some(index.as_raw(), this.lazy(expn_data));
1887 expn_hash_table.set_some(index.as_raw(), this.lazy(hash));
1888 }
1889 },
1890 );
1891
1892 (
1893 syntax_contexts.encode(&mut self.opaque),
1894 expn_data_table.encode(&mut self.opaque),
1895 expn_hash_table.encode(&mut self.opaque),
1896 )
1897 }
1898
1899 fn encode_proc_macros(&mut self) -> Option<ProcMacroData> {
1900 let is_proc_macro = self.tcx.crate_types().contains(&CrateType::ProcMacro);
1901 if is_proc_macro {
1902 let tcx = self.tcx;
1903 let proc_macro_decls_static = tcx.proc_macro_decls_static(()).unwrap().local_def_index;
1904 let stability = tcx.lookup_stability(CRATE_DEF_ID);
1905 let macros =
1906 self.lazy_array(tcx.resolutions(()).proc_macros.iter().map(|p| p.local_def_index));
1907 for (i, span) in self.tcx.sess.psess.proc_macro_quoted_spans() {
1908 let span = self.lazy(span);
1909 self.tables.proc_macro_quoted_spans.set_some(i, span);
1910 }
1911
1912 self.tables.def_kind.set_some(LOCAL_CRATE.as_def_id().index, DefKind::Mod);
1913 record!(self.tables.def_span[LOCAL_CRATE.as_def_id()] <- tcx.def_span(LOCAL_CRATE.as_def_id()));
1914 self.encode_attrs(LOCAL_CRATE.as_def_id().expect_local());
1915 let vis = tcx.local_visibility(CRATE_DEF_ID).map_id(|def_id| def_id.local_def_index);
1916 record!(self.tables.visibility[LOCAL_CRATE.as_def_id()] <- vis);
1917 if let Some(stability) = stability {
1918 record!(self.tables.lookup_stability[LOCAL_CRATE.as_def_id()] <- stability);
1919 }
1920 self.encode_deprecation(LOCAL_CRATE.as_def_id());
1921 if let Some(res_map) = tcx.resolutions(()).doc_link_resolutions.get(&CRATE_DEF_ID) {
1922 record!(self.tables.doc_link_resolutions[LOCAL_CRATE.as_def_id()] <- res_map);
1923 }
1924 if let Some(traits) = tcx.resolutions(()).doc_link_traits_in_scope.get(&CRATE_DEF_ID) {
1925 record_array!(self.tables.doc_link_traits_in_scope[LOCAL_CRATE.as_def_id()] <- traits);
1926 }
1927
1928 for &proc_macro in &tcx.resolutions(()).proc_macros {
1932 let id = proc_macro;
1933 let proc_macro = tcx.local_def_id_to_hir_id(proc_macro);
1934 let mut name = tcx.hir_name(proc_macro);
1935 let span = tcx.hir_span(proc_macro);
1936 let attrs = tcx.hir_attrs(proc_macro);
1939 let macro_kind = if ast::attr::contains_name(attrs, sym::proc_macro) {
1940 MacroKind::Bang
1941 } else if ast::attr::contains_name(attrs, sym::proc_macro_attribute) {
1942 MacroKind::Attr
1943 } else if let Some(attr) = ast::attr::find_by_name(attrs, sym::proc_macro_derive) {
1944 name = attr.meta_item_list().unwrap()[0]
1946 .meta_item()
1947 .unwrap()
1948 .ident()
1949 .unwrap()
1950 .name;
1951 MacroKind::Derive
1952 } else {
1953 bug!("Unknown proc-macro type for item {:?}", id);
1954 };
1955
1956 let mut def_key = self.tcx.hir_def_key(id);
1957 def_key.disambiguated_data.data = DefPathData::MacroNs(name);
1958
1959 let def_id = id.to_def_id();
1960 self.tables.def_kind.set_some(def_id.index, DefKind::Macro(macro_kind));
1961 self.tables.proc_macro.set_some(def_id.index, macro_kind);
1962 self.encode_attrs(id);
1963 record!(self.tables.def_keys[def_id] <- def_key);
1964 record!(self.tables.def_ident_span[def_id] <- span);
1965 record!(self.tables.def_span[def_id] <- span);
1966 record!(self.tables.visibility[def_id] <- ty::Visibility::Public);
1967 if let Some(stability) = stability {
1968 record!(self.tables.lookup_stability[def_id] <- stability);
1969 }
1970 }
1971
1972 Some(ProcMacroData { proc_macro_decls_static, stability, macros })
1973 } else {
1974 None
1975 }
1976 }
1977
1978 fn encode_debugger_visualizers(&mut self) -> LazyArray<DebuggerVisualizerFile> {
1979 empty_proc_macro!(self);
1980 self.lazy_array(
1981 self.tcx
1982 .debugger_visualizers(LOCAL_CRATE)
1983 .iter()
1984 .map(DebuggerVisualizerFile::path_erased),
1989 )
1990 }
1991
1992 fn encode_crate_deps(&mut self) -> LazyArray<CrateDep> {
1993 empty_proc_macro!(self);
1994
1995 let deps = self
1996 .tcx
1997 .crates(())
1998 .iter()
1999 .map(|&cnum| {
2000 let dep = CrateDep {
2001 name: self.tcx.crate_name(cnum),
2002 hash: self.tcx.crate_hash(cnum),
2003 host_hash: self.tcx.crate_host_hash(cnum),
2004 kind: self.tcx.dep_kind(cnum),
2005 extra_filename: self.tcx.extra_filename(cnum).clone(),
2006 is_private: self.tcx.is_private_dep(cnum),
2007 };
2008 (cnum, dep)
2009 })
2010 .collect::<Vec<_>>();
2011
2012 {
2013 let mut expected_cnum = 1;
2015 for &(n, _) in &deps {
2016 assert_eq!(n, CrateNum::new(expected_cnum));
2017 expected_cnum += 1;
2018 }
2019 }
2020
2021 self.lazy_array(deps.iter().map(|(_, dep)| dep))
2026 }
2027
2028 fn encode_target_modifiers(&mut self) -> LazyArray<TargetModifier> {
2029 empty_proc_macro!(self);
2030 let tcx = self.tcx;
2031 self.lazy_array(tcx.sess.opts.gather_target_modifiers())
2032 }
2033
2034 fn encode_lib_features(&mut self) -> LazyArray<(Symbol, FeatureStability)> {
2035 empty_proc_macro!(self);
2036 let tcx = self.tcx;
2037 let lib_features = tcx.lib_features(LOCAL_CRATE);
2038 self.lazy_array(lib_features.to_sorted_vec())
2039 }
2040
2041 fn encode_stability_implications(&mut self) -> LazyArray<(Symbol, Symbol)> {
2042 empty_proc_macro!(self);
2043 let tcx = self.tcx;
2044 let implications = tcx.stability_implications(LOCAL_CRATE);
2045 let sorted = implications.to_sorted_stable_ord();
2046 self.lazy_array(sorted.into_iter().map(|(k, v)| (*k, *v)))
2047 }
2048
2049 fn encode_diagnostic_items(&mut self) -> LazyArray<(Symbol, DefIndex)> {
2050 empty_proc_macro!(self);
2051 let tcx = self.tcx;
2052 let diagnostic_items = &tcx.diagnostic_items(LOCAL_CRATE).name_to_id;
2053 self.lazy_array(diagnostic_items.iter().map(|(&name, def_id)| (name, def_id.index)))
2054 }
2055
2056 fn encode_lang_items(&mut self) -> LazyArray<(DefIndex, LangItem)> {
2057 empty_proc_macro!(self);
2058 let lang_items = self.tcx.lang_items().iter();
2059 self.lazy_array(lang_items.filter_map(|(lang_item, def_id)| {
2060 def_id.as_local().map(|id| (id.local_def_index, lang_item))
2061 }))
2062 }
2063
2064 fn encode_lang_items_missing(&mut self) -> LazyArray<LangItem> {
2065 empty_proc_macro!(self);
2066 let tcx = self.tcx;
2067 self.lazy_array(&tcx.lang_items().missing)
2068 }
2069
2070 fn encode_stripped_cfg_items(&mut self) -> LazyArray<StrippedCfgItem<DefIndex>> {
2071 self.lazy_array(
2072 self.tcx
2073 .stripped_cfg_items(LOCAL_CRATE)
2074 .into_iter()
2075 .map(|item| item.clone().map_mod_id(|def_id| def_id.index)),
2076 )
2077 }
2078
2079 fn encode_traits(&mut self) -> LazyArray<DefIndex> {
2080 empty_proc_macro!(self);
2081 self.lazy_array(self.tcx.traits(LOCAL_CRATE).iter().map(|def_id| def_id.index))
2082 }
2083
2084 #[instrument(level = "debug", skip(self))]
2086 fn encode_impls(&mut self) -> LazyArray<TraitImpls> {
2087 empty_proc_macro!(self);
2088 let tcx = self.tcx;
2089 let mut trait_impls: FxIndexMap<DefId, Vec<(DefIndex, Option<SimplifiedType>)>> =
2090 FxIndexMap::default();
2091
2092 for id in tcx.hir_free_items() {
2093 let DefKind::Impl { of_trait } = tcx.def_kind(id.owner_id) else {
2094 continue;
2095 };
2096 let def_id = id.owner_id.to_def_id();
2097
2098 self.tables.defaultness.set_some(def_id.index, tcx.defaultness(def_id));
2099
2100 if of_trait && let Some(header) = tcx.impl_trait_header(def_id) {
2101 record!(self.tables.impl_trait_header[def_id] <- header);
2102
2103 let trait_ref = header.trait_ref.instantiate_identity();
2104 let simplified_self_ty = fast_reject::simplify_type(
2105 self.tcx,
2106 trait_ref.self_ty(),
2107 TreatParams::InstantiateWithInfer,
2108 );
2109 trait_impls
2110 .entry(trait_ref.def_id)
2111 .or_default()
2112 .push((id.owner_id.def_id.local_def_index, simplified_self_ty));
2113
2114 let trait_def = tcx.trait_def(trait_ref.def_id);
2115 if let Ok(mut an) = trait_def.ancestors(tcx, def_id) {
2116 if let Some(specialization_graph::Node::Impl(parent)) = an.nth(1) {
2117 self.tables.impl_parent.set_some(def_id.index, parent.into());
2118 }
2119 }
2120
2121 if tcx.is_lang_item(trait_ref.def_id, LangItem::CoerceUnsized) {
2124 let coerce_unsized_info = tcx.coerce_unsized_info(def_id).unwrap();
2125 record!(self.tables.coerce_unsized_info[def_id] <- coerce_unsized_info);
2126 }
2127 }
2128 }
2129
2130 let trait_impls: Vec<_> = trait_impls
2131 .into_iter()
2132 .map(|(trait_def_id, impls)| TraitImpls {
2133 trait_id: (trait_def_id.krate.as_u32(), trait_def_id.index),
2134 impls: self.lazy_array(&impls),
2135 })
2136 .collect();
2137
2138 self.lazy_array(&trait_impls)
2139 }
2140
2141 #[instrument(level = "debug", skip(self))]
2142 fn encode_incoherent_impls(&mut self) -> LazyArray<IncoherentImpls> {
2143 empty_proc_macro!(self);
2144 let tcx = self.tcx;
2145
2146 let all_impls: Vec<_> = tcx
2147 .crate_inherent_impls(())
2148 .0
2149 .incoherent_impls
2150 .iter()
2151 .map(|(&simp, impls)| IncoherentImpls {
2152 self_ty: simp,
2153 impls: self.lazy_array(impls.iter().map(|def_id| def_id.local_def_index)),
2154 })
2155 .collect();
2156
2157 self.lazy_array(&all_impls)
2158 }
2159
2160 fn encode_exportable_items(&mut self) -> LazyArray<DefIndex> {
2161 empty_proc_macro!(self);
2162 self.lazy_array(self.tcx.exportable_items(LOCAL_CRATE).iter().map(|def_id| def_id.index))
2163 }
2164
2165 fn encode_stable_order_of_exportable_impls(&mut self) -> LazyArray<(DefIndex, usize)> {
2166 empty_proc_macro!(self);
2167 let stable_order_of_exportable_impls =
2168 self.tcx.stable_order_of_exportable_impls(LOCAL_CRATE);
2169 self.lazy_array(
2170 stable_order_of_exportable_impls.iter().map(|(def_id, idx)| (def_id.index, *idx)),
2171 )
2172 }
2173
2174 fn encode_exported_symbols(
2181 &mut self,
2182 exported_symbols: &[(ExportedSymbol<'tcx>, SymbolExportInfo)],
2183 ) -> LazyArray<(ExportedSymbol<'static>, SymbolExportInfo)> {
2184 empty_proc_macro!(self);
2185 let metadata_symbol_name = SymbolName::new(self.tcx, &metadata_symbol_name(self.tcx));
2188
2189 self.lazy_array(
2190 exported_symbols
2191 .iter()
2192 .filter(|&(exported_symbol, _)| match *exported_symbol {
2193 ExportedSymbol::NoDefId(symbol_name) => symbol_name != metadata_symbol_name,
2194 _ => true,
2195 })
2196 .cloned(),
2197 )
2198 }
2199
2200 fn encode_dylib_dependency_formats(&mut self) -> LazyArray<Option<LinkagePreference>> {
2201 empty_proc_macro!(self);
2202 let formats = self.tcx.dependency_formats(());
2203 if let Some(arr) = formats.get(&CrateType::Dylib) {
2204 return self.lazy_array(arr.iter().skip(1 ).map(
2205 |slot| match *slot {
2206 Linkage::NotLinked | Linkage::IncludedFromDylib => None,
2207
2208 Linkage::Dynamic => Some(LinkagePreference::RequireDynamic),
2209 Linkage::Static => Some(LinkagePreference::RequireStatic),
2210 },
2211 ));
2212 }
2213 LazyArray::default()
2214 }
2215}
2216
2217fn prefetch_mir(tcx: TyCtxt<'_>) {
2220 if !tcx.sess.opts.output_types.should_codegen() {
2221 return;
2223 }
2224
2225 let reachable_set = tcx.reachable_set(());
2226 par_for_each_in(tcx.mir_keys(()), |&&def_id| {
2227 let (encode_const, encode_opt) = should_encode_mir(tcx, reachable_set, def_id);
2228
2229 if encode_const {
2230 tcx.ensure_done().mir_for_ctfe(def_id);
2231 }
2232 if encode_opt {
2233 tcx.ensure_done().optimized_mir(def_id);
2234 }
2235 if encode_opt || encode_const {
2236 tcx.ensure_done().promoted_mir(def_id);
2237 }
2238 })
2239}
2240
2241pub struct EncodedMetadata {
2265 full_metadata: Option<Mmap>,
2268 stub_metadata: Option<Vec<u8>>,
2271 _temp_dir: Option<MaybeTempDir>,
2274}
2275
2276impl EncodedMetadata {
2277 #[inline]
2278 pub fn from_path(
2279 path: PathBuf,
2280 stub_path: Option<PathBuf>,
2281 temp_dir: Option<MaybeTempDir>,
2282 ) -> std::io::Result<Self> {
2283 let file = std::fs::File::open(&path)?;
2284 let file_metadata = file.metadata()?;
2285 if file_metadata.len() == 0 {
2286 return Ok(Self { full_metadata: None, stub_metadata: None, _temp_dir: None });
2287 }
2288 let full_mmap = unsafe { Some(Mmap::map(file)?) };
2289
2290 let stub =
2291 if let Some(stub_path) = stub_path { Some(std::fs::read(stub_path)?) } else { None };
2292
2293 Ok(Self { full_metadata: full_mmap, stub_metadata: stub, _temp_dir: temp_dir })
2294 }
2295
2296 #[inline]
2297 pub fn full(&self) -> &[u8] {
2298 &self.full_metadata.as_deref().unwrap_or_default()
2299 }
2300
2301 #[inline]
2302 pub fn stub_or_full(&self) -> &[u8] {
2303 self.stub_metadata.as_deref().unwrap_or(self.full())
2304 }
2305}
2306
2307impl<S: Encoder> Encodable<S> for EncodedMetadata {
2308 fn encode(&self, s: &mut S) {
2309 self.stub_metadata.encode(s);
2310
2311 let slice = self.full();
2312 slice.encode(s)
2313 }
2314}
2315
2316impl<D: Decoder> Decodable<D> for EncodedMetadata {
2317 fn decode(d: &mut D) -> Self {
2318 let stub = <Option<Vec<u8>>>::decode(d);
2319
2320 let len = d.read_usize();
2321 let full_metadata = if len > 0 {
2322 let mut mmap = MmapMut::map_anon(len).unwrap();
2323 mmap.copy_from_slice(d.read_raw_bytes(len));
2324 Some(mmap.make_read_only().unwrap())
2325 } else {
2326 None
2327 };
2328
2329 Self { full_metadata, stub_metadata: stub, _temp_dir: None }
2330 }
2331}
2332
2333pub fn encode_metadata(tcx: TyCtxt<'_>, path: &Path, ref_path: Option<&Path>) {
2334 let _prof_timer = tcx.prof.verbose_generic_activity("generate_crate_metadata");
2335
2336 tcx.dep_graph.assert_ignored();
2339
2340 if tcx.sess.threads() != 1 {
2341 join(|| prefetch_mir(tcx), || tcx.exported_symbols(LOCAL_CRATE));
2345 }
2346
2347 with_encode_metadata_header(tcx, path, |ecx| {
2348 let root = ecx.encode_crate_root();
2351
2352 ecx.opaque.flush();
2354 tcx.prof.artifact_size(
2356 "crate_metadata",
2357 "crate_metadata",
2358 ecx.opaque.file().metadata().unwrap().len(),
2359 );
2360
2361 root.position.get()
2362 });
2363
2364 if let Some(ref_path) = ref_path {
2365 with_encode_metadata_header(tcx, ref_path, |ecx| {
2366 let header: LazyValue<CrateHeader> = ecx.lazy(CrateHeader {
2367 name: tcx.crate_name(LOCAL_CRATE),
2368 triple: tcx.sess.opts.target_triple.clone(),
2369 hash: tcx.crate_hash(LOCAL_CRATE),
2370 is_proc_macro_crate: false,
2371 is_stub: true,
2372 });
2373 header.position.get()
2374 });
2375 }
2376}
2377
2378fn with_encode_metadata_header(
2379 tcx: TyCtxt<'_>,
2380 path: &Path,
2381 f: impl FnOnce(&mut EncodeContext<'_, '_>) -> usize,
2382) {
2383 let mut encoder = opaque::FileEncoder::new(path)
2384 .unwrap_or_else(|err| tcx.dcx().emit_fatal(FailCreateFileEncoder { err }));
2385 encoder.emit_raw_bytes(METADATA_HEADER);
2386
2387 encoder.emit_raw_bytes(&0u64.to_le_bytes());
2389
2390 let source_map_files = tcx.sess.source_map().files();
2391 let source_file_cache = (Arc::clone(&source_map_files[0]), 0);
2392 let required_source_files = Some(FxIndexSet::default());
2393 drop(source_map_files);
2394
2395 let hygiene_ctxt = HygieneEncodeContext::default();
2396
2397 let mut ecx = EncodeContext {
2398 opaque: encoder,
2399 tcx,
2400 feat: tcx.features(),
2401 tables: Default::default(),
2402 lazy_state: LazyState::NoNode,
2403 span_shorthands: Default::default(),
2404 type_shorthands: Default::default(),
2405 predicate_shorthands: Default::default(),
2406 source_file_cache,
2407 interpret_allocs: Default::default(),
2408 required_source_files,
2409 is_proc_macro: tcx.crate_types().contains(&CrateType::ProcMacro),
2410 hygiene_ctxt: &hygiene_ctxt,
2411 symbol_table: Default::default(),
2412 };
2413
2414 rustc_version(tcx.sess.cfg_version).encode(&mut ecx);
2416
2417 let root_position = f(&mut ecx);
2418
2419 if let Err((path, err)) = ecx.opaque.finish() {
2423 tcx.dcx().emit_fatal(FailWriteFile { path: &path, err });
2424 }
2425
2426 let file = ecx.opaque.file();
2427 if let Err(err) = encode_root_position(file, root_position) {
2428 tcx.dcx().emit_fatal(FailWriteFile { path: ecx.opaque.path(), err });
2429 }
2430}
2431
2432fn encode_root_position(mut file: &File, pos: usize) -> Result<(), std::io::Error> {
2433 let pos_before_seek = file.stream_position().unwrap();
2435
2436 let header = METADATA_HEADER.len();
2438 file.seek(std::io::SeekFrom::Start(header as u64))?;
2439 file.write_all(&pos.to_le_bytes())?;
2440
2441 file.seek(std::io::SeekFrom::Start(pos_before_seek))?;
2443 Ok(())
2444}
2445
2446pub(crate) fn provide(providers: &mut Providers) {
2447 *providers = Providers {
2448 doc_link_resolutions: |tcx, def_id| {
2449 tcx.resolutions(())
2450 .doc_link_resolutions
2451 .get(&def_id)
2452 .unwrap_or_else(|| span_bug!(tcx.def_span(def_id), "no resolutions for a doc link"))
2453 },
2454 doc_link_traits_in_scope: |tcx, def_id| {
2455 tcx.resolutions(()).doc_link_traits_in_scope.get(&def_id).unwrap_or_else(|| {
2456 span_bug!(tcx.def_span(def_id), "no traits in scope for a doc link")
2457 })
2458 },
2459
2460 ..*providers
2461 }
2462}
2463
2464pub fn rendered_const<'tcx>(tcx: TyCtxt<'tcx>, body: &hir::Body<'_>, def_id: LocalDefId) -> String {
2492 let value = body.value;
2493
2494 #[derive(PartialEq, Eq)]
2495 enum Classification {
2496 Literal,
2497 Simple,
2498 Complex,
2499 }
2500
2501 use Classification::*;
2502
2503 fn classify(expr: &hir::Expr<'_>) -> Classification {
2504 match &expr.kind {
2505 hir::ExprKind::Unary(hir::UnOp::Neg, expr) => {
2506 if matches!(expr.kind, hir::ExprKind::Lit(_)) { Literal } else { Complex }
2507 }
2508 hir::ExprKind::Lit(_) => Literal,
2509 hir::ExprKind::Tup([]) => Simple,
2510 hir::ExprKind::Block(hir::Block { stmts: [], expr: Some(expr), .. }, _) => {
2511 if classify(expr) == Complex { Complex } else { Simple }
2512 }
2513 hir::ExprKind::Path(hir::QPath::Resolved(_, hir::Path { segments, .. })) => {
2518 if segments.iter().all(|segment| segment.args.is_none()) { Simple } else { Complex }
2519 }
2520 hir::ExprKind::Path(hir::QPath::TypeRelative(..)) => Simple,
2523 hir::ExprKind::Path(hir::QPath::LangItem(..)) => Simple,
2525 _ => Complex,
2526 }
2527 }
2528
2529 match classify(value) {
2530 Literal
2540 if !value.span.from_expansion()
2541 && let Ok(snippet) = tcx.sess.source_map().span_to_snippet(value.span) =>
2542 {
2543 snippet
2544 }
2545
2546 Literal | Simple => id_to_string(&tcx, body.id().hir_id),
2549
2550 Complex => {
2554 if tcx.def_kind(def_id) == DefKind::AnonConst {
2555 "{ _ }".to_owned()
2556 } else {
2557 "_".to_owned()
2558 }
2559 }
2560 }
2561}