1 use crate::cstore::{self, LoadedMacro};
4 use crate::native_libs;
5 use crate::foreign_modules;
8 use rustc::ty::query::QueryConfig;
9 use rustc::middle::cstore::{CrateSource, CrateStore, DepKind, EncodedMetadata, NativeLibraryKind};
10 use rustc::middle::exported_symbols::ExportedSymbol;
11 use rustc::middle::stability::DeprecationEntry;
12 use rustc::middle::dependency_format::Linkage;
15 use rustc::session::{CrateDisambiguator, Session};
16 use rustc::ty::{self, TyCtxt};
17 use rustc::ty::query::Providers;
18 use rustc::hir::def_id::{CrateNum, DefId, LOCAL_CRATE, CRATE_DEF_INDEX};
19 use rustc::hir::map::{DefKey, DefPath, DefPathHash};
20 use rustc::hir::map::definitions::DefPathTable;
21 use rustc::util::nodemap::DefIdMap;
22 use rustc_data_structures::svh::Svh;
24 use smallvec::SmallVec;
26 use rustc_data_structures::sync::Lrc;
31 use syntax::source_map;
32 use syntax::parse::source_file_to_stream;
33 use syntax::parse::parser::emit_unclosed_delims;
34 use syntax::source_map::Spanned;
35 use syntax::symbol::Symbol;
36 use syntax_pos::{Span, FileName};
37 use rustc_index::bit_set::BitSet;
39 macro_rules! provide {
40 (<$lt:tt> $tcx:ident, $def_id:ident, $other:ident, $cdata:ident,
41 $($name:ident => $compute:block)*) => {
42 pub fn provide_extern<$lt>(providers: &mut Providers<$lt>) {
43 // HACK(eddyb) `$lt: $lt` forces `$lt` to be early-bound, which
44 // allows the associated type in the return type to be normalized.
45 $(fn $name<$lt: $lt, T: IntoArgs>(
48 ) -> <ty::queries::$name<$lt> as QueryConfig<$lt>>::Value {
50 $tcx.prof.generic_activity("metadata_decode_entry");
52 #[allow(unused_variables)]
53 let ($def_id, $other) = def_id_arg.into_args();
54 assert!(!$def_id.is_local());
56 let $cdata = $tcx.crate_data_as_any($def_id.krate);
57 let $cdata = $cdata.downcast_ref::<cstore::CrateMetadata>()
58 .expect("CrateStore created data is not a CrateMetadata");
60 if $tcx.dep_graph.is_fully_enabled() {
61 let crate_dep_node_index = $cdata.get_crate_dep_node_index($tcx);
62 $tcx.dep_graph.read_index(crate_dep_node_index);
68 *providers = Providers {
76 // small trait to work around different signature queries all being defined via
79 fn into_args(self) -> (DefId, DefId);
82 impl IntoArgs for DefId {
83 fn into_args(self) -> (DefId, DefId) { (self, self) }
86 impl IntoArgs for CrateNum {
87 fn into_args(self) -> (DefId, DefId) { (self.as_def_id(), self.as_def_id()) }
90 impl IntoArgs for (CrateNum, DefId) {
91 fn into_args(self) -> (DefId, DefId) { (self.0.as_def_id(), self.1) }
94 provide! { <'tcx> tcx, def_id, other, cdata,
95 type_of => { cdata.get_type(def_id.index, tcx) }
97 tcx.arena.alloc(cdata.get_generics(def_id.index, tcx.sess))
99 predicates_of => { cdata.get_predicates(def_id.index, tcx) }
100 predicates_defined_on => { cdata.get_predicates_defined_on(def_id.index, tcx) }
101 super_predicates_of => { cdata.get_super_predicates(def_id.index, tcx) }
103 tcx.arena.alloc(cdata.get_trait_def(def_id.index, tcx.sess))
105 adt_def => { cdata.get_adt_def(def_id.index, tcx) }
108 tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
110 variances_of => { tcx.arena.alloc_from_iter(cdata.get_item_variances(def_id.index)) }
111 associated_item_def_ids => {
112 let mut result = SmallVec::<[_; 8]>::new();
113 cdata.each_child_of_item(def_id.index,
114 |child| result.push(child.res.def_id()), tcx.sess);
115 tcx.arena.alloc_slice(&result)
117 associated_item => { cdata.get_associated_item(def_id.index) }
118 impl_trait_ref => { cdata.get_impl_trait(def_id.index, tcx) }
119 impl_polarity => { cdata.get_impl_polarity(def_id.index) }
120 coerce_unsized_info => {
121 cdata.get_coerce_unsized_info(def_id.index).unwrap_or_else(|| {
122 bug!("coerce_unsized_info: `{:?}` is missing its info", def_id);
125 optimized_mir => { tcx.arena.alloc(cdata.get_optimized_mir(tcx, def_id.index)) }
126 promoted_mir => { tcx.arena.alloc(cdata.get_promoted_mir(tcx, def_id.index)) }
127 mir_const_qualif => {
128 (cdata.mir_const_qualif(def_id.index), tcx.arena.alloc(BitSet::new_empty(0)))
130 fn_sig => { cdata.fn_sig(def_id.index, tcx) }
131 inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) }
132 is_const_fn_raw => { cdata.is_const_fn_raw(def_id.index) }
133 asyncness => { cdata.asyncness(def_id.index) }
134 is_foreign_item => { cdata.is_foreign_item(def_id.index) }
135 static_mutability => { cdata.static_mutability(def_id.index) }
136 def_kind => { cdata.def_kind(def_id.index) }
137 def_span => { cdata.get_span(def_id.index, &tcx.sess) }
138 lookup_stability => {
139 cdata.get_stability(def_id.index).map(|s| tcx.intern_stability(s))
141 lookup_deprecation_entry => {
142 cdata.get_deprecation(def_id.index).map(DeprecationEntry::external)
144 item_attrs => { cdata.get_item_attrs(def_id.index, tcx.sess) }
145 // FIXME(#38501) We've skipped a `read` on the `HirBody` of
146 // a `fn` when encoding, so the dep-tracking wouldn't work.
147 // This is only used by rustdoc anyway, which shouldn't have
148 // incremental recompilation ever enabled.
149 fn_arg_names => { cdata.get_fn_param_names(def_id.index) }
150 rendered_const => { cdata.get_rendered_const(def_id.index) }
151 impl_parent => { cdata.get_parent_impl(def_id.index) }
152 trait_of_item => { cdata.get_trait_of_item(def_id.index) }
153 is_mir_available => { cdata.is_item_mir_available(def_id.index) }
155 dylib_dependency_formats => { cdata.get_dylib_dependency_formats(tcx) }
156 is_panic_runtime => { cdata.root.panic_runtime }
157 is_compiler_builtins => { cdata.root.compiler_builtins }
158 has_global_allocator => { cdata.root.has_global_allocator }
159 has_panic_handler => { cdata.root.has_panic_handler }
160 is_sanitizer_runtime => { cdata.root.sanitizer_runtime }
161 is_profiler_runtime => { cdata.root.profiler_runtime }
162 panic_strategy => { cdata.root.panic_strategy }
164 let r = *cdata.extern_crate.lock();
165 r.map(|c| &*tcx.arena.alloc(c))
167 is_no_builtins => { cdata.root.no_builtins }
168 symbol_mangling_version => { cdata.root.symbol_mangling_version }
169 impl_defaultness => { cdata.get_impl_defaultness(def_id.index) }
170 reachable_non_generics => {
171 let reachable_non_generics = tcx
172 .exported_symbols(cdata.cnum)
174 .filter_map(|&(exported_symbol, export_level)| {
175 if let ExportedSymbol::NonGeneric(def_id) = exported_symbol {
176 return Some((def_id, export_level))
183 tcx.arena.alloc(reachable_non_generics)
185 native_libraries => { Lrc::new(cdata.get_native_libraries(tcx.sess)) }
186 foreign_modules => { cdata.get_foreign_modules(tcx) }
187 plugin_registrar_fn => {
188 cdata.root.plugin_registrar_fn.map(|index| {
189 DefId { krate: def_id.krate, index }
192 proc_macro_decls_static => {
193 cdata.root.proc_macro_decls_static.map(|index| {
194 DefId { krate: def_id.krate, index }
197 crate_disambiguator => { cdata.root.disambiguator }
198 crate_hash => { cdata.root.hash }
199 original_crate_name => { cdata.root.name }
201 extra_filename => { cdata.root.extra_filename.clone() }
203 implementations_of_trait => {
204 cdata.get_implementations_for_trait(tcx, Some(other))
207 all_trait_implementations => {
208 cdata.get_implementations_for_trait(tcx, None)
211 visibility => { cdata.get_visibility(def_id.index) }
213 let r = *cdata.dep_kind.lock();
216 crate_name => { cdata.root.name }
218 let mut result = SmallVec::<[_; 8]>::new();
219 cdata.each_child_of_item(def_id.index, |child| result.push(child), tcx.sess);
220 tcx.arena.alloc_slice(&result)
222 defined_lib_features => { cdata.get_lib_features(tcx) }
223 defined_lang_items => { cdata.get_lang_items(tcx) }
224 diagnostic_items => { cdata.get_diagnostic_items(tcx) }
225 missing_lang_items => { cdata.get_missing_lang_items(tcx) }
227 missing_extern_crate_item => {
228 let r = match *cdata.extern_crate.borrow() {
229 Some(extern_crate) if !extern_crate.is_direct() => true,
235 used_crate_source => { Lrc::new(cdata.source.clone()) }
237 exported_symbols => {
238 let mut syms = cdata.exported_symbols(tcx);
240 // When linked into a dylib crates don't export their generic symbols,
241 // so if that's happening then we can't load upstream monomorphizations
243 let formats = tcx.dependency_formats(LOCAL_CRATE);
244 let remove_generics = formats.iter().any(|(_ty, list)| {
245 match list.get(def_id.krate.as_usize() - 1) {
246 Some(Linkage::IncludedFromDylib) | Some(Linkage::Dynamic) => true,
251 syms.retain(|(sym, _threshold)| {
253 ExportedSymbol::Generic(..) => false,
263 pub fn provide(providers: &mut Providers<'_>) {
264 // FIXME(#44234) - almost all of these queries have no sub-queries and
265 // therefore no actual inputs, they're just reading tables calculated in
266 // resolve! Does this work? Unsure! That's what the issue is about
267 *providers = Providers {
268 is_dllimport_foreign_item: |tcx, id| {
269 match tcx.native_library_kind(id) {
270 Some(NativeLibraryKind::NativeUnknown) |
271 Some(NativeLibraryKind::NativeRawDylib) => true,
275 is_statically_included_foreign_item: |tcx, id| {
276 match tcx.native_library_kind(id) {
277 Some(NativeLibraryKind::NativeStatic) |
278 Some(NativeLibraryKind::NativeStaticNobundle) => true,
282 native_library_kind: |tcx, id| {
283 tcx.native_libraries(id.krate)
285 .filter(|lib| native_libs::relevant_lib(&tcx.sess, lib))
287 let fm_id = match lib.foreign_module {
289 None => return false,
291 tcx.foreign_modules(id.krate)
293 .find(|m| m.def_id == fm_id)
294 .expect("failed to find foreign module")
300 native_libraries: |tcx, cnum| {
301 assert_eq!(cnum, LOCAL_CRATE);
302 Lrc::new(native_libs::collect(tcx))
304 foreign_modules: |tcx, cnum| {
305 assert_eq!(cnum, LOCAL_CRATE);
306 &tcx.arena.alloc(foreign_modules::collect(tcx))[..]
308 link_args: |tcx, cnum| {
309 assert_eq!(cnum, LOCAL_CRATE);
310 Lrc::new(link_args::collect(tcx))
313 // Returns a map from a sufficiently visible external item (i.e., an
314 // external item that is visible from at least one local module) to a
315 // sufficiently visible parent (considering modules that re-export the
316 // external item to be parents).
317 visible_parent_map: |tcx, cnum| {
318 use std::collections::vec_deque::VecDeque;
319 use std::collections::hash_map::Entry;
321 assert_eq!(cnum, LOCAL_CRATE);
322 let mut visible_parent_map: DefIdMap<DefId> = Default::default();
324 // Issue 46112: We want the map to prefer the shortest
325 // paths when reporting the path to an item. Therefore we
326 // build up the map via a breadth-first search (BFS),
327 // which naturally yields minimal-length paths.
329 // Note that it needs to be a BFS over the whole forest of
330 // crates, not just each individual crate; otherwise you
331 // only get paths that are locally minimal with respect to
332 // whatever crate we happened to encounter first in this
333 // traversal, but not globally minimal across all crates.
334 let bfs_queue = &mut VecDeque::new();
336 // Preferring shortest paths alone does not guarantee a
337 // deterministic result; so sort by crate num to avoid
338 // hashtable iteration non-determinism. This only makes
339 // things as deterministic as crate-nums assignment is,
340 // which is to say, its not deterministic in general. But
341 // we believe that libstd is consistently assigned crate
342 // num 1, so it should be enough to resolve #46112.
343 let mut crates: Vec<CrateNum> = (*tcx.crates()).to_owned();
346 for &cnum in crates.iter() {
347 // Ignore crates without a corresponding local `extern crate` item.
348 if tcx.missing_extern_crate_item(cnum) {
352 bfs_queue.push_back(DefId {
354 index: CRATE_DEF_INDEX
358 // (restrict scope of mutable-borrow of `visible_parent_map`)
360 let visible_parent_map = &mut visible_parent_map;
361 let mut add_child = |bfs_queue: &mut VecDeque<_>,
362 child: &def::Export<hir::HirId>,
364 if child.vis != ty::Visibility::Public {
368 if let Some(child) = child.res.opt_def_id() {
369 match visible_parent_map.entry(child) {
370 Entry::Occupied(mut entry) => {
371 // If `child` is defined in crate `cnum`, ensure
372 // that it is mapped to a parent in `cnum`.
373 if child.krate == cnum && entry.get().krate != cnum {
374 entry.insert(parent);
377 Entry::Vacant(entry) => {
378 entry.insert(parent);
379 bfs_queue.push_back(child);
385 while let Some(def) = bfs_queue.pop_front() {
386 for child in tcx.item_children(def).iter() {
387 add_child(bfs_queue, child, def);
392 tcx.arena.alloc(visible_parent_map)
395 dependency_formats: |tcx, cnum| {
396 assert_eq!(cnum, LOCAL_CRATE);
397 Lrc::new(crate::dependency_format::calculate(tcx))
404 impl cstore::CStore {
405 pub fn export_macros_untracked(&self, cnum: CrateNum) {
406 let data = self.get_crate_data(cnum);
407 let mut dep_kind = data.dep_kind.lock();
408 if *dep_kind == DepKind::UnexportedMacrosOnly {
409 *dep_kind = DepKind::MacrosOnly;
413 pub fn struct_field_names_untracked(&self, def: DefId, sess: &Session) -> Vec<Spanned<Symbol>> {
414 self.get_crate_data(def.krate).get_struct_field_names(def.index, sess)
417 pub fn item_children_untracked(
421 ) -> Vec<def::Export<hir::HirId>> {
422 let mut result = vec![];
423 self.get_crate_data(def_id.krate)
424 .each_child_of_item(def_id.index, |child| result.push(child), sess);
428 pub fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro {
429 let _prof_timer = sess.prof.generic_activity("metadata_load_macro");
431 let data = self.get_crate_data(id.krate);
432 if data.is_proc_macro_crate() {
433 return LoadedMacro::ProcMacro(data.load_proc_macro(id.index, sess));
436 let def = data.get_macro(id.index);
437 let macro_full_name = data.def_path(id.index).to_string_friendly(|_| data.root.name);
438 let source_name = FileName::Macros(macro_full_name);
440 let source_file = sess.parse_sess.source_map().new_source_file(source_name, def.body);
441 let local_span = Span::with_root_ctxt(source_file.start_pos, source_file.end_pos);
442 let (body, mut errors) = source_file_to_stream(&sess.parse_sess, source_file, None);
443 emit_unclosed_delims(&mut errors, &sess.diagnostic());
445 // Mark the attrs as used
446 let attrs = data.get_item_attrs(id.index, sess);
447 for attr in attrs.iter() {
448 attr::mark_used(attr);
451 let name = data.def_key(id.index).disambiguated_data.data
452 .get_opt_name().expect("no name in load_macro");
453 sess.imported_macro_spans.borrow_mut()
454 .insert(local_span, (name.to_string(), data.get_span(id.index, sess)));
456 LoadedMacro::MacroDef(ast::Item {
457 // FIXME: cross-crate hygiene
458 ident: ast::Ident::with_dummy_span(name),
459 id: ast::DUMMY_NODE_ID,
461 attrs: attrs.iter().cloned().collect(),
462 kind: ast::ItemKind::MacroDef(ast::MacroDef {
466 vis: source_map::respan(local_span.shrink_to_lo(), ast::VisibilityKind::Inherited),
468 }, data.root.edition)
471 pub fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssocItem {
472 self.get_crate_data(def.krate).get_associated_item(def.index)
475 pub fn crate_source_untracked(&self, cnum: CrateNum) -> CrateSource {
476 self.get_crate_data(cnum).source.clone()
480 impl CrateStore for cstore::CStore {
481 fn crate_data_as_any(&self, cnum: CrateNum) -> &dyn Any {
482 self.get_crate_data(cnum)
485 fn item_generics_cloned_untracked(&self, def: DefId, sess: &Session) -> ty::Generics {
486 self.get_crate_data(def.krate).get_generics(def.index, sess)
489 fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol
491 self.get_crate_data(cnum).root.name
494 fn crate_is_private_dep_untracked(&self, cnum: CrateNum) -> bool {
495 self.get_crate_data(cnum).private_dep
498 fn crate_disambiguator_untracked(&self, cnum: CrateNum) -> CrateDisambiguator
500 self.get_crate_data(cnum).root.disambiguator
503 fn crate_hash_untracked(&self, cnum: CrateNum) -> Svh
505 self.get_crate_data(cnum).root.hash
508 /// Returns the `DefKey` for a given `DefId`. This indicates the
509 /// parent `DefId` as well as some idea of what kind of data the
510 /// `DefId` refers to.
511 fn def_key(&self, def: DefId) -> DefKey {
512 self.get_crate_data(def.krate).def_key(def.index)
515 fn def_path(&self, def: DefId) -> DefPath {
516 self.get_crate_data(def.krate).def_path(def.index)
519 fn def_path_hash(&self, def: DefId) -> DefPathHash {
520 self.get_crate_data(def.krate).def_path_hash(def.index)
523 fn def_path_table(&self, cnum: CrateNum) -> &DefPathTable {
524 &self.get_crate_data(cnum).def_path_table
527 fn crates_untracked(&self) -> Vec<CrateNum>
529 let mut result = vec![];
530 self.iter_crate_data(|cnum, _| result.push(cnum));
534 fn postorder_cnums_untracked(&self) -> Vec<CrateNum> {
535 self.do_postorder_cnums_untracked()
538 fn encode_metadata(&self, tcx: TyCtxt<'_>) -> EncodedMetadata {
539 encoder::encode_metadata(tcx)
542 fn metadata_encoding_version(&self) -> &[u8]
544 schema::METADATA_HEADER