1 use crate::creader::{CStore, LoadedMacro};
2 use crate::foreign_modules;
4 use crate::native_libs;
5 use crate::rmeta::{self, encoder};
7 use rustc::hir::exports::Export;
8 use rustc::hir::map::definitions::DefPathTable;
9 use rustc::hir::map::{DefKey, DefPath, DefPathHash};
10 use rustc::middle::cstore::{CrateSource, CrateStore, EncodedMetadata, NativeLibraryKind};
11 use rustc::middle::exported_symbols::ExportedSymbol;
12 use rustc::middle::stability::DeprecationEntry;
13 use rustc::session::{CrateDisambiguator, Session};
14 use rustc::ty::query::Providers;
15 use rustc::ty::query::QueryConfig;
16 use rustc::ty::{self, TyCtxt};
19 use rustc_ast::expand::allocator::AllocatorKind;
20 use rustc_ast::ptr::P;
21 use rustc_ast::tokenstream::DelimSpan;
22 use rustc_data_structures::svh::Svh;
24 use rustc_hir::def_id::{CrateNum, DefId, DefIdMap, CRATE_DEF_INDEX, LOCAL_CRATE};
25 use rustc_span::source_map::{self, Span, Spanned};
26 use rustc_span::symbol::Symbol;
28 use rustc_data_structures::sync::Lrc;
29 use smallvec::SmallVec;
33 macro_rules! provide {
34 (<$lt:tt> $tcx:ident, $def_id:ident, $other:ident, $cdata:ident,
35 $($name:ident => $compute:block)*) => {
36 pub fn provide_extern<$lt>(providers: &mut Providers<$lt>) {
37 // HACK(eddyb) `$lt: $lt` forces `$lt` to be early-bound, which
38 // allows the associated type in the return type to be normalized.
39 $(fn $name<$lt: $lt, T: IntoArgs>(
42 ) -> <ty::queries::$name<$lt> as QueryConfig<$lt>>::Value {
44 $tcx.prof.generic_activity("metadata_decode_entry");
46 #[allow(unused_variables)]
47 let ($def_id, $other) = def_id_arg.into_args();
48 assert!(!$def_id.is_local());
50 let $cdata = CStore::from_tcx($tcx).get_crate_data($def_id.krate);
52 if $tcx.dep_graph.is_fully_enabled() {
53 let crate_dep_node_index = $cdata.get_crate_dep_node_index($tcx);
54 $tcx.dep_graph.read_index(crate_dep_node_index);
60 *providers = Providers {
68 // small trait to work around different signature queries all being defined via
71 fn into_args(self) -> (DefId, DefId);
74 impl IntoArgs for DefId {
75 fn into_args(self) -> (DefId, DefId) {
80 impl IntoArgs for CrateNum {
81 fn into_args(self) -> (DefId, DefId) {
82 (self.as_def_id(), self.as_def_id())
86 impl IntoArgs for (CrateNum, DefId) {
87 fn into_args(self) -> (DefId, DefId) {
88 (self.0.as_def_id(), self.1)
92 provide! { <'tcx> tcx, def_id, other, cdata,
93 type_of => { cdata.get_type(def_id.index, tcx) }
95 tcx.arena.alloc(cdata.get_generics(def_id.index, tcx.sess))
97 explicit_predicates_of => { cdata.get_explicit_predicates(def_id.index, tcx) }
98 inferred_outlives_of => { cdata.get_inferred_outlives(def_id.index, tcx) }
99 super_predicates_of => { cdata.get_super_predicates(def_id.index, tcx) }
101 tcx.arena.alloc(cdata.get_trait_def(def_id.index, tcx.sess))
103 adt_def => { cdata.get_adt_def(def_id.index, tcx) }
106 tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
108 variances_of => { tcx.arena.alloc_from_iter(cdata.get_item_variances(def_id.index)) }
109 associated_item_def_ids => {
110 let mut result = SmallVec::<[_; 8]>::new();
111 cdata.each_child_of_item(def_id.index,
112 |child| result.push(child.res.def_id()), tcx.sess);
113 tcx.arena.alloc_slice(&result)
115 associated_item => { cdata.get_associated_item(def_id.index) }
116 impl_trait_ref => { cdata.get_impl_trait(def_id.index, tcx) }
117 impl_polarity => { cdata.get_impl_polarity(def_id.index) }
118 coerce_unsized_info => {
119 cdata.get_coerce_unsized_info(def_id.index).unwrap_or_else(|| {
120 bug!("coerce_unsized_info: `{:?}` is missing its info", def_id);
123 optimized_mir => { tcx.arena.alloc(cdata.get_optimized_mir(tcx, def_id.index)) }
124 promoted_mir => { tcx.arena.alloc(cdata.get_promoted_mir(tcx, def_id.index)) }
125 mir_const_qualif => { cdata.mir_const_qualif(def_id.index) }
126 fn_sig => { cdata.fn_sig(def_id.index, tcx) }
127 inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) }
128 is_const_fn_raw => { cdata.is_const_fn_raw(def_id.index) }
129 asyncness => { cdata.asyncness(def_id.index) }
130 is_foreign_item => { cdata.is_foreign_item(def_id.index) }
131 static_mutability => { cdata.static_mutability(def_id.index) }
132 generator_kind => { cdata.generator_kind(def_id.index) }
133 def_kind => { cdata.def_kind(def_id.index) }
134 def_span => { cdata.get_span(def_id.index, &tcx.sess) }
135 lookup_stability => {
136 cdata.get_stability(def_id.index).map(|s| tcx.intern_stability(s))
138 lookup_const_stability => {
139 cdata.get_const_stability(def_id.index).map(|s| tcx.intern_const_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_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 crate_host_hash => { cdata.host_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 syms = cdata.exported_symbols(tcx);
240 // FIXME rust-lang/rust#64319, rust-lang/rust#64872: We want
241 // to block export of generics from dylibs, but we must fix
242 // rust-lang/rust#65890 before we can do that robustly.
248 pub fn provide(providers: &mut Providers<'_>) {
249 // FIXME(#44234) - almost all of these queries have no sub-queries and
250 // therefore no actual inputs, they're just reading tables calculated in
251 // resolve! Does this work? Unsure! That's what the issue is about
252 *providers = Providers {
253 is_dllimport_foreign_item: |tcx, id| match tcx.native_library_kind(id) {
254 Some(NativeLibraryKind::NativeUnknown) | Some(NativeLibraryKind::NativeRawDylib) => {
259 is_statically_included_foreign_item: |tcx, id| match tcx.native_library_kind(id) {
260 Some(NativeLibraryKind::NativeStatic)
261 | Some(NativeLibraryKind::NativeStaticNobundle) => true,
264 native_library_kind: |tcx, id| {
265 tcx.native_libraries(id.krate)
267 .filter(|lib| native_libs::relevant_lib(&tcx.sess, lib))
269 let fm_id = match lib.foreign_module {
271 None => return false,
273 tcx.foreign_modules(id.krate)
275 .find(|m| m.def_id == fm_id)
276 .expect("failed to find foreign module")
282 native_libraries: |tcx, cnum| {
283 assert_eq!(cnum, LOCAL_CRATE);
284 Lrc::new(native_libs::collect(tcx))
286 foreign_modules: |tcx, cnum| {
287 assert_eq!(cnum, LOCAL_CRATE);
288 &tcx.arena.alloc(foreign_modules::collect(tcx))[..]
290 link_args: |tcx, cnum| {
291 assert_eq!(cnum, LOCAL_CRATE);
292 Lrc::new(link_args::collect(tcx))
295 // Returns a map from a sufficiently visible external item (i.e., an
296 // external item that is visible from at least one local module) to a
297 // sufficiently visible parent (considering modules that re-export the
298 // external item to be parents).
299 visible_parent_map: |tcx, cnum| {
300 use std::collections::hash_map::Entry;
301 use std::collections::vec_deque::VecDeque;
303 assert_eq!(cnum, LOCAL_CRATE);
304 let mut visible_parent_map: DefIdMap<DefId> = Default::default();
306 // Issue 46112: We want the map to prefer the shortest
307 // paths when reporting the path to an item. Therefore we
308 // build up the map via a breadth-first search (BFS),
309 // which naturally yields minimal-length paths.
311 // Note that it needs to be a BFS over the whole forest of
312 // crates, not just each individual crate; otherwise you
313 // only get paths that are locally minimal with respect to
314 // whatever crate we happened to encounter first in this
315 // traversal, but not globally minimal across all crates.
316 let bfs_queue = &mut VecDeque::new();
318 // Preferring shortest paths alone does not guarantee a
319 // deterministic result; so sort by crate num to avoid
320 // hashtable iteration non-determinism. This only makes
321 // things as deterministic as crate-nums assignment is,
322 // which is to say, its not deterministic in general. But
323 // we believe that libstd is consistently assigned crate
324 // num 1, so it should be enough to resolve #46112.
325 let mut crates: Vec<CrateNum> = (*tcx.crates()).to_owned();
328 for &cnum in crates.iter() {
329 // Ignore crates without a corresponding local `extern crate` item.
330 if tcx.missing_extern_crate_item(cnum) {
334 bfs_queue.push_back(DefId { krate: cnum, index: CRATE_DEF_INDEX });
337 // (restrict scope of mutable-borrow of `visible_parent_map`)
339 let visible_parent_map = &mut visible_parent_map;
341 |bfs_queue: &mut VecDeque<_>, child: &Export<hir::HirId>, parent: DefId| {
342 if child.vis != ty::Visibility::Public {
346 if let Some(child) = child.res.opt_def_id() {
347 match visible_parent_map.entry(child) {
348 Entry::Occupied(mut entry) => {
349 // If `child` is defined in crate `cnum`, ensure
350 // that it is mapped to a parent in `cnum`.
351 if child.krate == cnum && entry.get().krate != cnum {
352 entry.insert(parent);
355 Entry::Vacant(entry) => {
356 entry.insert(parent);
357 bfs_queue.push_back(child);
363 while let Some(def) = bfs_queue.pop_front() {
364 for child in tcx.item_children(def).iter() {
365 add_child(bfs_queue, child, def);
370 tcx.arena.alloc(visible_parent_map)
373 dependency_formats: |tcx, cnum| {
374 assert_eq!(cnum, LOCAL_CRATE);
375 Lrc::new(crate::dependency_format::calculate(tcx))
377 has_global_allocator: |tcx, cnum| {
378 assert_eq!(cnum, LOCAL_CRATE);
379 CStore::from_tcx(tcx).has_global_allocator()
381 postorder_cnums: |tcx, cnum| {
382 assert_eq!(cnum, LOCAL_CRATE);
383 tcx.arena.alloc_slice(&CStore::from_tcx(tcx).crate_dependencies_in_postorder(cnum))
391 pub fn struct_field_names_untracked(&self, def: DefId, sess: &Session) -> Vec<Spanned<Symbol>> {
392 self.get_crate_data(def.krate).get_struct_field_names(def.index, sess)
395 pub fn item_children_untracked(
399 ) -> Vec<Export<hir::HirId>> {
400 let mut result = vec![];
401 self.get_crate_data(def_id.krate).each_child_of_item(
403 |child| result.push(child),
409 pub fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro {
410 let _prof_timer = sess.prof.generic_activity("metadata_load_macro");
412 let data = self.get_crate_data(id.krate);
413 if data.root.is_proc_macro_crate() {
414 return LoadedMacro::ProcMacro(data.load_proc_macro(id.index, sess));
417 let span = data.get_span(id.index, sess);
418 let dspan = DelimSpan::from_single(span);
419 let rmeta::MacroDef { body, legacy } = data.get_macro(id.index, sess);
421 // Mark the attrs as used
422 let attrs = data.get_item_attrs(id.index, sess);
423 for attr in attrs.iter() {
424 attr::mark_used(attr);
432 .expect("no name in load_macro");
433 sess.imported_macro_spans.borrow_mut().insert(span, (name.to_string(), span));
435 LoadedMacro::MacroDef(
437 // FIXME: cross-crate hygiene
438 ident: ast::Ident::with_dummy_span(name),
439 id: ast::DUMMY_NODE_ID,
441 attrs: attrs.iter().cloned().collect(),
442 kind: ast::ItemKind::MacroDef(ast::MacroDef {
443 body: P(ast::MacArgs::Delimited(dspan, ast::MacDelimiter::Brace, body)),
446 vis: source_map::respan(span.shrink_to_lo(), ast::VisibilityKind::Inherited),
453 pub fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssocItem {
454 self.get_crate_data(def.krate).get_associated_item(def.index)
457 pub fn crate_source_untracked(&self, cnum: CrateNum) -> CrateSource {
458 self.get_crate_data(cnum).source.clone()
461 pub fn get_span_untracked(&self, def_id: DefId, sess: &Session) -> Span {
462 self.get_crate_data(def_id.krate).get_span(def_id.index, sess)
465 pub fn item_generics_num_lifetimes(&self, def_id: DefId, sess: &Session) -> usize {
466 self.get_crate_data(def_id.krate).get_generics(def_id.index, sess).own_counts().lifetimes
470 impl CrateStore for CStore {
471 fn as_any(&self) -> &dyn Any {
475 fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol {
476 self.get_crate_data(cnum).root.name
479 fn crate_is_private_dep_untracked(&self, cnum: CrateNum) -> bool {
480 self.get_crate_data(cnum).private_dep
483 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 {
488 self.get_crate_data(cnum).root.hash
491 /// Returns the `DefKey` for a given `DefId`. This indicates the
492 /// parent `DefId` as well as some idea of what kind of data the
493 /// `DefId` refers to.
494 fn def_key(&self, def: DefId) -> DefKey {
495 self.get_crate_data(def.krate).def_key(def.index)
498 fn def_path(&self, def: DefId) -> DefPath {
499 self.get_crate_data(def.krate).def_path(def.index)
502 fn def_path_hash(&self, def: DefId) -> DefPathHash {
503 self.get_crate_data(def.krate).def_path_hash(def.index)
506 fn def_path_table(&self, cnum: CrateNum) -> &DefPathTable {
507 &self.get_crate_data(cnum).cdata.def_path_table
510 fn crates_untracked(&self) -> Vec<CrateNum> {
511 let mut result = vec![];
512 self.iter_crate_data(|cnum, _| result.push(cnum));
516 fn encode_metadata(&self, tcx: TyCtxt<'_>) -> EncodedMetadata {
517 encoder::encode_metadata(tcx)
520 fn metadata_encoding_version(&self) -> &[u8] {
521 rmeta::METADATA_HEADER
524 fn allocator_kind(&self) -> Option<AllocatorKind> {
525 self.allocator_kind()