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;
14 use rustc::session::{CrateDisambiguator, Session};
15 use rustc::ty::{self, TyCtxt};
16 use rustc::ty::query::Providers;
17 use rustc::hir::def_id::{CrateNum, DefId, LOCAL_CRATE, CRATE_DEF_INDEX};
18 use rustc::hir::map::{DefKey, DefPath, DefPathHash};
19 use rustc::hir::map::definitions::DefPathTable;
20 use rustc::util::nodemap::DefIdMap;
21 use rustc_data_structures::svh::Svh;
23 use smallvec::SmallVec;
25 use rustc_data_structures::sync::Lrc;
30 use syntax::source_map;
31 use syntax::parse::source_file_to_stream;
32 use syntax::parse::parser::emit_unclosed_delims;
33 use syntax::source_map::Spanned;
34 use syntax::symbol::Symbol;
35 use syntax_pos::{Span, FileName};
36 use rustc_index::bit_set::BitSet;
38 macro_rules! provide {
39 (<$lt:tt> $tcx:ident, $def_id:ident, $other:ident, $cdata:ident,
40 $($name:ident => $compute:block)*) => {
41 pub fn provide_extern<$lt>(providers: &mut Providers<$lt>) {
42 // HACK(eddyb) `$lt: $lt` forces `$lt` to be early-bound, which
43 // allows the associated type in the return type to be normalized.
44 $(fn $name<$lt: $lt, T: IntoArgs>(
47 ) -> <ty::queries::$name<$lt> as QueryConfig<$lt>>::Value {
49 $tcx.prof.generic_activity("metadata_decode_entry");
51 #[allow(unused_variables)]
52 let ($def_id, $other) = def_id_arg.into_args();
53 assert!(!$def_id.is_local());
55 let $cdata = $tcx.crate_data_as_any($def_id.krate);
56 let $cdata = $cdata.downcast_ref::<cstore::CrateMetadata>()
57 .expect("CrateStore created data is not a CrateMetadata");
59 if $tcx.dep_graph.is_fully_enabled() {
60 let crate_dep_node_index = $cdata.get_crate_dep_node_index($tcx);
61 $tcx.dep_graph.read_index(crate_dep_node_index);
67 *providers = Providers {
75 // small trait to work around different signature queries all being defined via
78 fn into_args(self) -> (DefId, DefId);
81 impl IntoArgs for DefId {
82 fn into_args(self) -> (DefId, DefId) { (self, self) }
85 impl IntoArgs for CrateNum {
86 fn into_args(self) -> (DefId, DefId) { (self.as_def_id(), self.as_def_id()) }
89 impl IntoArgs for (CrateNum, DefId) {
90 fn into_args(self) -> (DefId, DefId) { (self.0.as_def_id(), self.1) }
93 provide! { <'tcx> tcx, def_id, other, cdata,
94 type_of => { cdata.get_type(def_id.index, tcx) }
96 tcx.arena.alloc(cdata.get_generics(def_id.index, tcx.sess))
98 predicates_of => { cdata.get_predicates(def_id.index, tcx) }
99 predicates_defined_on => { cdata.get_predicates_defined_on(def_id.index, tcx) }
100 super_predicates_of => { cdata.get_super_predicates(def_id.index, tcx) }
102 tcx.arena.alloc(cdata.get_trait_def(def_id.index, tcx.sess))
104 adt_def => { cdata.get_adt_def(def_id.index, tcx) }
107 tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
109 variances_of => { tcx.arena.alloc_from_iter(cdata.get_item_variances(def_id.index)) }
110 associated_item_def_ids => {
111 let mut result = SmallVec::<[_; 8]>::new();
112 cdata.each_child_of_item(def_id.index,
113 |child| result.push(child.res.def_id()), tcx.sess);
114 tcx.arena.alloc_slice(&result)
116 associated_item => { cdata.get_associated_item(def_id.index) }
117 impl_trait_ref => { cdata.get_impl_trait(def_id.index, tcx) }
118 impl_polarity => { cdata.get_impl_polarity(def_id.index) }
119 coerce_unsized_info => {
120 cdata.get_coerce_unsized_info(def_id.index).unwrap_or_else(|| {
121 bug!("coerce_unsized_info: `{:?}` is missing its info", def_id);
124 optimized_mir => { tcx.arena.alloc(cdata.get_optimized_mir(tcx, def_id.index)) }
125 promoted_mir => { tcx.arena.alloc(cdata.get_promoted_mir(tcx, def_id.index)) }
126 mir_const_qualif => {
127 (cdata.mir_const_qualif(def_id.index), tcx.arena.alloc(BitSet::new_empty(0)))
129 fn_sig => { cdata.fn_sig(def_id.index, tcx) }
130 inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) }
131 is_const_fn_raw => { cdata.is_const_fn_raw(def_id.index) }
132 asyncness => { cdata.asyncness(def_id.index) }
133 is_foreign_item => { cdata.is_foreign_item(def_id.index) }
134 static_mutability => { cdata.static_mutability(def_id.index) }
135 def_kind => { cdata.def_kind(def_id.index) }
136 def_span => { cdata.get_span(def_id.index, &tcx.sess) }
137 lookup_stability => {
138 cdata.get_stability(def_id.index).map(|s| tcx.intern_stability(s))
140 lookup_deprecation_entry => {
141 cdata.get_deprecation(def_id.index).map(DeprecationEntry::external)
143 item_attrs => { cdata.get_item_attrs(def_id.index, tcx.sess) }
144 // FIXME(#38501) We've skipped a `read` on the `HirBody` of
145 // a `fn` when encoding, so the dep-tracking wouldn't work.
146 // This is only used by rustdoc anyway, which shouldn't have
147 // incremental recompilation ever enabled.
148 fn_arg_names => { cdata.get_fn_param_names(def_id.index) }
149 rendered_const => { cdata.get_rendered_const(def_id.index) }
150 impl_parent => { cdata.get_parent_impl(def_id.index) }
151 trait_of_item => { cdata.get_trait_of_item(def_id.index) }
152 is_mir_available => { cdata.is_item_mir_available(def_id.index) }
154 dylib_dependency_formats => { cdata.get_dylib_dependency_formats(tcx) }
155 is_panic_runtime => { cdata.root.panic_runtime }
156 is_compiler_builtins => { cdata.root.compiler_builtins }
157 has_global_allocator => { cdata.root.has_global_allocator }
158 has_panic_handler => { cdata.root.has_panic_handler }
159 is_sanitizer_runtime => { cdata.root.sanitizer_runtime }
160 is_profiler_runtime => { cdata.root.profiler_runtime }
161 panic_strategy => { cdata.root.panic_strategy }
163 let r = *cdata.extern_crate.lock();
164 r.map(|c| &*tcx.arena.alloc(c))
166 is_no_builtins => { cdata.root.no_builtins }
167 symbol_mangling_version => { cdata.root.symbol_mangling_version }
168 impl_defaultness => { cdata.get_impl_defaultness(def_id.index) }
169 reachable_non_generics => {
170 let reachable_non_generics = tcx
171 .exported_symbols(cdata.cnum)
173 .filter_map(|&(exported_symbol, export_level)| {
174 if let ExportedSymbol::NonGeneric(def_id) = exported_symbol {
175 return Some((def_id, export_level))
182 tcx.arena.alloc(reachable_non_generics)
184 native_libraries => { Lrc::new(cdata.get_native_libraries(tcx.sess)) }
185 foreign_modules => { cdata.get_foreign_modules(tcx) }
186 plugin_registrar_fn => {
187 cdata.root.plugin_registrar_fn.map(|index| {
188 DefId { krate: def_id.krate, index }
191 proc_macro_decls_static => {
192 cdata.root.proc_macro_decls_static.map(|index| {
193 DefId { krate: def_id.krate, index }
196 crate_disambiguator => { cdata.root.disambiguator }
197 crate_hash => { cdata.root.hash }
198 original_crate_name => { cdata.root.name }
200 extra_filename => { cdata.root.extra_filename.clone() }
202 implementations_of_trait => {
203 cdata.get_implementations_for_trait(tcx, Some(other))
206 all_trait_implementations => {
207 cdata.get_implementations_for_trait(tcx, None)
210 visibility => { cdata.get_visibility(def_id.index) }
212 let r = *cdata.dep_kind.lock();
215 crate_name => { cdata.root.name }
217 let mut result = SmallVec::<[_; 8]>::new();
218 cdata.each_child_of_item(def_id.index, |child| result.push(child), tcx.sess);
219 tcx.arena.alloc_slice(&result)
221 defined_lib_features => { cdata.get_lib_features(tcx) }
222 defined_lang_items => { cdata.get_lang_items(tcx) }
223 diagnostic_items => { cdata.get_diagnostic_items(tcx) }
224 missing_lang_items => { cdata.get_missing_lang_items(tcx) }
226 missing_extern_crate_item => {
227 let r = match *cdata.extern_crate.borrow() {
228 Some(extern_crate) if !extern_crate.is_direct() => true,
234 used_crate_source => { Lrc::new(cdata.source.clone()) }
236 exported_symbols => {
237 let syms = cdata.exported_symbols(tcx);
239 // FIXME rust-lang/rust#64319, rust-lang/rust#64872: We want
240 // to block export of generics from dylibs, but we must fix
241 // rust-lang/rust#65890 before we can do that robustly.
247 pub fn provide(providers: &mut Providers<'_>) {
248 // FIXME(#44234) - almost all of these queries have no sub-queries and
249 // therefore no actual inputs, they're just reading tables calculated in
250 // resolve! Does this work? Unsure! That's what the issue is about
251 *providers = Providers {
252 is_dllimport_foreign_item: |tcx, id| {
253 match tcx.native_library_kind(id) {
254 Some(NativeLibraryKind::NativeUnknown) |
255 Some(NativeLibraryKind::NativeRawDylib) => true,
259 is_statically_included_foreign_item: |tcx, id| {
260 match tcx.native_library_kind(id) {
261 Some(NativeLibraryKind::NativeStatic) |
262 Some(NativeLibraryKind::NativeStaticNobundle) => true,
266 native_library_kind: |tcx, id| {
267 tcx.native_libraries(id.krate)
269 .filter(|lib| native_libs::relevant_lib(&tcx.sess, lib))
271 let fm_id = match lib.foreign_module {
273 None => return false,
275 tcx.foreign_modules(id.krate)
277 .find(|m| m.def_id == fm_id)
278 .expect("failed to find foreign module")
284 native_libraries: |tcx, cnum| {
285 assert_eq!(cnum, LOCAL_CRATE);
286 Lrc::new(native_libs::collect(tcx))
288 foreign_modules: |tcx, cnum| {
289 assert_eq!(cnum, LOCAL_CRATE);
290 &tcx.arena.alloc(foreign_modules::collect(tcx))[..]
292 link_args: |tcx, cnum| {
293 assert_eq!(cnum, LOCAL_CRATE);
294 Lrc::new(link_args::collect(tcx))
297 // Returns a map from a sufficiently visible external item (i.e., an
298 // external item that is visible from at least one local module) to a
299 // sufficiently visible parent (considering modules that re-export the
300 // external item to be parents).
301 visible_parent_map: |tcx, cnum| {
302 use std::collections::vec_deque::VecDeque;
303 use std::collections::hash_map::Entry;
305 assert_eq!(cnum, LOCAL_CRATE);
306 let mut visible_parent_map: DefIdMap<DefId> = Default::default();
308 // Issue 46112: We want the map to prefer the shortest
309 // paths when reporting the path to an item. Therefore we
310 // build up the map via a breadth-first search (BFS),
311 // which naturally yields minimal-length paths.
313 // Note that it needs to be a BFS over the whole forest of
314 // crates, not just each individual crate; otherwise you
315 // only get paths that are locally minimal with respect to
316 // whatever crate we happened to encounter first in this
317 // traversal, but not globally minimal across all crates.
318 let bfs_queue = &mut VecDeque::new();
320 // Preferring shortest paths alone does not guarantee a
321 // deterministic result; so sort by crate num to avoid
322 // hashtable iteration non-determinism. This only makes
323 // things as deterministic as crate-nums assignment is,
324 // which is to say, its not deterministic in general. But
325 // we believe that libstd is consistently assigned crate
326 // num 1, so it should be enough to resolve #46112.
327 let mut crates: Vec<CrateNum> = (*tcx.crates()).to_owned();
330 for &cnum in crates.iter() {
331 // Ignore crates without a corresponding local `extern crate` item.
332 if tcx.missing_extern_crate_item(cnum) {
336 bfs_queue.push_back(DefId {
338 index: CRATE_DEF_INDEX
342 // (restrict scope of mutable-borrow of `visible_parent_map`)
344 let visible_parent_map = &mut visible_parent_map;
345 let mut add_child = |bfs_queue: &mut VecDeque<_>,
346 child: &def::Export<hir::HirId>,
348 if child.vis != ty::Visibility::Public {
352 if let Some(child) = child.res.opt_def_id() {
353 match visible_parent_map.entry(child) {
354 Entry::Occupied(mut entry) => {
355 // If `child` is defined in crate `cnum`, ensure
356 // that it is mapped to a parent in `cnum`.
357 if child.krate == cnum && entry.get().krate != cnum {
358 entry.insert(parent);
361 Entry::Vacant(entry) => {
362 entry.insert(parent);
363 bfs_queue.push_back(child);
369 while let Some(def) = bfs_queue.pop_front() {
370 for child in tcx.item_children(def).iter() {
371 add_child(bfs_queue, child, def);
376 tcx.arena.alloc(visible_parent_map)
379 dependency_formats: |tcx, cnum| {
380 assert_eq!(cnum, LOCAL_CRATE);
381 Lrc::new(crate::dependency_format::calculate(tcx))
388 impl cstore::CStore {
389 pub fn export_macros_untracked(&self, cnum: CrateNum) {
390 let data = self.get_crate_data(cnum);
391 let mut dep_kind = data.dep_kind.lock();
392 if *dep_kind == DepKind::UnexportedMacrosOnly {
393 *dep_kind = DepKind::MacrosOnly;
397 pub fn struct_field_names_untracked(&self, def: DefId, sess: &Session) -> Vec<Spanned<Symbol>> {
398 self.get_crate_data(def.krate).get_struct_field_names(def.index, sess)
401 pub fn item_children_untracked(
405 ) -> Vec<def::Export<hir::HirId>> {
406 let mut result = vec![];
407 self.get_crate_data(def_id.krate)
408 .each_child_of_item(def_id.index, |child| result.push(child), sess);
412 pub fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro {
413 let _prof_timer = sess.prof.generic_activity("metadata_load_macro");
415 let data = self.get_crate_data(id.krate);
416 if data.is_proc_macro_crate() {
417 return LoadedMacro::ProcMacro(data.load_proc_macro(id.index, sess));
420 let def = data.get_macro(id.index);
421 let macro_full_name = data.def_path(id.index).to_string_friendly(|_| data.root.name);
422 let source_name = FileName::Macros(macro_full_name);
424 let source_file = sess.parse_sess.source_map().new_source_file(source_name, def.body);
425 let local_span = Span::with_root_ctxt(source_file.start_pos, source_file.end_pos);
426 let (body, mut errors) = source_file_to_stream(&sess.parse_sess, source_file, None);
427 emit_unclosed_delims(&mut errors, &sess.diagnostic());
429 // Mark the attrs as used
430 let attrs = data.get_item_attrs(id.index, sess);
431 for attr in attrs.iter() {
432 attr::mark_used(attr);
435 let name = data.def_key(id.index).disambiguated_data.data
436 .get_opt_name().expect("no name in load_macro");
437 sess.imported_macro_spans.borrow_mut()
438 .insert(local_span, (name.to_string(), data.get_span(id.index, sess)));
440 LoadedMacro::MacroDef(ast::Item {
441 // FIXME: cross-crate hygiene
442 ident: ast::Ident::with_dummy_span(name),
443 id: ast::DUMMY_NODE_ID,
445 attrs: attrs.iter().cloned().collect(),
446 kind: ast::ItemKind::MacroDef(ast::MacroDef {
450 vis: source_map::respan(local_span.shrink_to_lo(), ast::VisibilityKind::Inherited),
452 }, data.root.edition)
455 pub fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssocItem {
456 self.get_crate_data(def.krate).get_associated_item(def.index)
459 pub fn crate_source_untracked(&self, cnum: CrateNum) -> CrateSource {
460 self.get_crate_data(cnum).source.clone()
464 impl CrateStore for cstore::CStore {
465 fn crate_data_as_any(&self, cnum: CrateNum) -> &dyn Any {
466 self.get_crate_data(cnum)
469 fn item_generics_cloned_untracked(&self, def: DefId, sess: &Session) -> ty::Generics {
470 self.get_crate_data(def.krate).get_generics(def.index, sess)
473 fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol
475 self.get_crate_data(cnum).root.name
478 fn crate_is_private_dep_untracked(&self, cnum: CrateNum) -> bool {
479 self.get_crate_data(cnum).private_dep
482 fn crate_disambiguator_untracked(&self, cnum: CrateNum) -> CrateDisambiguator
484 self.get_crate_data(cnum).root.disambiguator
487 fn crate_hash_untracked(&self, cnum: CrateNum) -> Svh
489 self.get_crate_data(cnum).root.hash
492 fn crate_host_hash_untracked(&self, cnum: CrateNum) -> Option<Svh> {
493 self.get_crate_data(cnum).host_hash
496 /// Returns the `DefKey` for a given `DefId`. This indicates the
497 /// parent `DefId` as well as some idea of what kind of data the
498 /// `DefId` refers to.
499 fn def_key(&self, def: DefId) -> DefKey {
500 self.get_crate_data(def.krate).def_key(def.index)
503 fn def_path(&self, def: DefId) -> DefPath {
504 self.get_crate_data(def.krate).def_path(def.index)
507 fn def_path_hash(&self, def: DefId) -> DefPathHash {
508 self.get_crate_data(def.krate).def_path_hash(def.index)
511 fn def_path_table(&self, cnum: CrateNum) -> &DefPathTable {
512 &self.get_crate_data(cnum).def_path_table
515 fn crates_untracked(&self) -> Vec<CrateNum>
517 let mut result = vec![];
518 self.iter_crate_data(|cnum, _| result.push(cnum));
522 fn postorder_cnums_untracked(&self) -> Vec<CrateNum> {
523 self.do_postorder_cnums_untracked()
526 fn encode_metadata(&self, tcx: TyCtxt<'_>) -> EncodedMetadata {
527 encoder::encode_metadata(tcx)
530 fn metadata_encoding_version(&self) -> &[u8]
532 schema::METADATA_HEADER