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};
17 use rustc_data_structures::svh::Svh;
19 use rustc_hir::def_id::{CrateNum, DefId, DefIdMap, CRATE_DEF_INDEX, LOCAL_CRATE};
20 use rustc_parse::parser::emit_unclosed_delims;
21 use rustc_parse::source_file_to_stream;
23 use rustc_data_structures::sync::Lrc;
24 use smallvec::SmallVec;
30 use rustc_ast::expand::allocator::AllocatorKind;
31 use rustc_ast::ptr::P;
32 use rustc_ast::tokenstream::DelimSpan;
33 use rustc_span::source_map;
34 use rustc_span::source_map::Spanned;
35 use rustc_span::symbol::Symbol;
36 use rustc_span::{FileName, Span};
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 $cdata = CStore::from_tcx($tcx).get_crate_data($def_id.krate);
57 if $tcx.dep_graph.is_fully_enabled() {
58 let crate_dep_node_index = $cdata.get_crate_dep_node_index($tcx);
59 $tcx.dep_graph.read_index(crate_dep_node_index);
65 *providers = Providers {
73 // small trait to work around different signature queries all being defined via
76 fn into_args(self) -> (DefId, DefId);
79 impl IntoArgs for DefId {
80 fn into_args(self) -> (DefId, DefId) {
85 impl IntoArgs for CrateNum {
86 fn into_args(self) -> (DefId, DefId) {
87 (self.as_def_id(), self.as_def_id())
91 impl IntoArgs for (CrateNum, DefId) {
92 fn into_args(self) -> (DefId, DefId) {
93 (self.0.as_def_id(), self.1)
97 provide! { <'tcx> tcx, def_id, other, cdata,
98 type_of => { cdata.get_type(def_id.index, tcx) }
100 tcx.arena.alloc(cdata.get_generics(def_id.index, tcx.sess))
102 explicit_predicates_of => { cdata.get_explicit_predicates(def_id.index, tcx) }
103 inferred_outlives_of => { cdata.get_inferred_outlives(def_id.index, tcx) }
104 super_predicates_of => { cdata.get_super_predicates(def_id.index, tcx) }
106 tcx.arena.alloc(cdata.get_trait_def(def_id.index, tcx.sess))
108 adt_def => { cdata.get_adt_def(def_id.index, tcx) }
111 tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
113 variances_of => { tcx.arena.alloc_from_iter(cdata.get_item_variances(def_id.index)) }
114 associated_item_def_ids => {
115 let mut result = SmallVec::<[_; 8]>::new();
116 cdata.each_child_of_item(def_id.index,
117 |child| result.push(child.res.def_id()), tcx.sess);
118 tcx.arena.alloc_slice(&result)
120 associated_item => { cdata.get_associated_item(def_id.index) }
121 impl_trait_ref => { cdata.get_impl_trait(def_id.index, tcx) }
122 impl_polarity => { cdata.get_impl_polarity(def_id.index) }
123 coerce_unsized_info => {
124 cdata.get_coerce_unsized_info(def_id.index).unwrap_or_else(|| {
125 bug!("coerce_unsized_info: `{:?}` is missing its info", def_id);
128 optimized_mir => { tcx.arena.alloc(cdata.get_optimized_mir(tcx, def_id.index)) }
129 promoted_mir => { tcx.arena.alloc(cdata.get_promoted_mir(tcx, def_id.index)) }
130 mir_const_qualif => { cdata.mir_const_qualif(def_id.index) }
131 fn_sig => { cdata.fn_sig(def_id.index, tcx) }
132 inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) }
133 is_const_fn_raw => { cdata.is_const_fn_raw(def_id.index) }
134 asyncness => { cdata.asyncness(def_id.index) }
135 is_foreign_item => { cdata.is_foreign_item(def_id.index) }
136 static_mutability => { cdata.static_mutability(def_id.index) }
137 generator_kind => { cdata.generator_kind(def_id.index) }
138 def_kind => { cdata.def_kind(def_id.index) }
139 def_span => { cdata.get_span(def_id.index, &tcx.sess) }
140 lookup_stability => {
141 cdata.get_stability(def_id.index).map(|s| tcx.intern_stability(s))
143 lookup_const_stability => {
144 cdata.get_const_stability(def_id.index).map(|s| tcx.intern_const_stability(s))
146 lookup_deprecation_entry => {
147 cdata.get_deprecation(def_id.index).map(DeprecationEntry::external)
149 item_attrs => { cdata.get_item_attrs(def_id.index, tcx.sess) }
150 // FIXME(#38501) We've skipped a `read` on the `HirBody` of
151 // a `fn` when encoding, so the dep-tracking wouldn't work.
152 // This is only used by rustdoc anyway, which shouldn't have
153 // incremental recompilation ever enabled.
154 fn_arg_names => { cdata.get_fn_param_names(def_id.index) }
155 rendered_const => { cdata.get_rendered_const(def_id.index) }
156 impl_parent => { cdata.get_parent_impl(def_id.index) }
157 trait_of_item => { cdata.get_trait_of_item(def_id.index) }
158 is_mir_available => { cdata.is_item_mir_available(def_id.index) }
160 dylib_dependency_formats => { cdata.get_dylib_dependency_formats(tcx) }
161 is_panic_runtime => { cdata.root.panic_runtime }
162 is_compiler_builtins => { cdata.root.compiler_builtins }
163 has_global_allocator => { cdata.root.has_global_allocator }
164 has_panic_handler => { cdata.root.has_panic_handler }
165 is_profiler_runtime => { cdata.root.profiler_runtime }
166 panic_strategy => { cdata.root.panic_strategy }
168 let r = *cdata.extern_crate.lock();
169 r.map(|c| &*tcx.arena.alloc(c))
171 is_no_builtins => { cdata.root.no_builtins }
172 symbol_mangling_version => { cdata.root.symbol_mangling_version }
173 impl_defaultness => { cdata.get_impl_defaultness(def_id.index) }
174 reachable_non_generics => {
175 let reachable_non_generics = tcx
176 .exported_symbols(cdata.cnum)
178 .filter_map(|&(exported_symbol, export_level)| {
179 if let ExportedSymbol::NonGeneric(def_id) = exported_symbol {
180 return Some((def_id, export_level))
187 tcx.arena.alloc(reachable_non_generics)
189 native_libraries => { Lrc::new(cdata.get_native_libraries(tcx.sess)) }
190 foreign_modules => { cdata.get_foreign_modules(tcx) }
191 plugin_registrar_fn => {
192 cdata.root.plugin_registrar_fn.map(|index| {
193 DefId { krate: def_id.krate, index }
196 proc_macro_decls_static => {
197 cdata.root.proc_macro_decls_static.map(|index| {
198 DefId { krate: def_id.krate, index }
201 crate_disambiguator => { cdata.root.disambiguator }
202 crate_hash => { cdata.root.hash }
203 crate_host_hash => { cdata.host_hash }
204 original_crate_name => { cdata.root.name }
206 extra_filename => { cdata.root.extra_filename.clone() }
208 implementations_of_trait => {
209 cdata.get_implementations_for_trait(tcx, Some(other))
212 all_trait_implementations => {
213 cdata.get_implementations_for_trait(tcx, None)
216 visibility => { cdata.get_visibility(def_id.index) }
218 let r = *cdata.dep_kind.lock();
221 crate_name => { cdata.root.name }
223 let mut result = SmallVec::<[_; 8]>::new();
224 cdata.each_child_of_item(def_id.index, |child| result.push(child), tcx.sess);
225 tcx.arena.alloc_slice(&result)
227 defined_lib_features => { cdata.get_lib_features(tcx) }
228 defined_lang_items => { cdata.get_lang_items(tcx) }
229 diagnostic_items => { cdata.get_diagnostic_items(tcx) }
230 missing_lang_items => { cdata.get_missing_lang_items(tcx) }
232 missing_extern_crate_item => {
233 let r = match *cdata.extern_crate.borrow() {
234 Some(extern_crate) if !extern_crate.is_direct() => true,
240 used_crate_source => { Lrc::new(cdata.source.clone()) }
242 exported_symbols => {
243 let syms = cdata.exported_symbols(tcx);
245 // FIXME rust-lang/rust#64319, rust-lang/rust#64872: We want
246 // to block export of generics from dylibs, but we must fix
247 // rust-lang/rust#65890 before we can do that robustly.
253 pub fn provide(providers: &mut Providers<'_>) {
254 // FIXME(#44234) - almost all of these queries have no sub-queries and
255 // therefore no actual inputs, they're just reading tables calculated in
256 // resolve! Does this work? Unsure! That's what the issue is about
257 *providers = Providers {
258 is_dllimport_foreign_item: |tcx, id| match tcx.native_library_kind(id) {
259 Some(NativeLibraryKind::NativeUnknown) | Some(NativeLibraryKind::NativeRawDylib) => {
264 is_statically_included_foreign_item: |tcx, id| match tcx.native_library_kind(id) {
265 Some(NativeLibraryKind::NativeStatic)
266 | Some(NativeLibraryKind::NativeStaticNobundle) => true,
269 native_library_kind: |tcx, id| {
270 tcx.native_libraries(id.krate)
272 .filter(|lib| native_libs::relevant_lib(&tcx.sess, lib))
274 let fm_id = match lib.foreign_module {
276 None => return false,
278 tcx.foreign_modules(id.krate)
280 .find(|m| m.def_id == fm_id)
281 .expect("failed to find foreign module")
287 native_libraries: |tcx, cnum| {
288 assert_eq!(cnum, LOCAL_CRATE);
289 Lrc::new(native_libs::collect(tcx))
291 foreign_modules: |tcx, cnum| {
292 assert_eq!(cnum, LOCAL_CRATE);
293 &tcx.arena.alloc(foreign_modules::collect(tcx))[..]
295 link_args: |tcx, cnum| {
296 assert_eq!(cnum, LOCAL_CRATE);
297 Lrc::new(link_args::collect(tcx))
300 // Returns a map from a sufficiently visible external item (i.e., an
301 // external item that is visible from at least one local module) to a
302 // sufficiently visible parent (considering modules that re-export the
303 // external item to be parents).
304 visible_parent_map: |tcx, cnum| {
305 use std::collections::hash_map::Entry;
306 use std::collections::vec_deque::VecDeque;
308 assert_eq!(cnum, LOCAL_CRATE);
309 let mut visible_parent_map: DefIdMap<DefId> = Default::default();
311 // Issue 46112: We want the map to prefer the shortest
312 // paths when reporting the path to an item. Therefore we
313 // build up the map via a breadth-first search (BFS),
314 // which naturally yields minimal-length paths.
316 // Note that it needs to be a BFS over the whole forest of
317 // crates, not just each individual crate; otherwise you
318 // only get paths that are locally minimal with respect to
319 // whatever crate we happened to encounter first in this
320 // traversal, but not globally minimal across all crates.
321 let bfs_queue = &mut VecDeque::new();
323 // Preferring shortest paths alone does not guarantee a
324 // deterministic result; so sort by crate num to avoid
325 // hashtable iteration non-determinism. This only makes
326 // things as deterministic as crate-nums assignment is,
327 // which is to say, its not deterministic in general. But
328 // we believe that libstd is consistently assigned crate
329 // num 1, so it should be enough to resolve #46112.
330 let mut crates: Vec<CrateNum> = (*tcx.crates()).to_owned();
333 for &cnum in crates.iter() {
334 // Ignore crates without a corresponding local `extern crate` item.
335 if tcx.missing_extern_crate_item(cnum) {
339 bfs_queue.push_back(DefId { krate: cnum, index: CRATE_DEF_INDEX });
342 // (restrict scope of mutable-borrow of `visible_parent_map`)
344 let visible_parent_map = &mut visible_parent_map;
346 |bfs_queue: &mut VecDeque<_>, child: &Export<hir::HirId>, parent: DefId| {
347 if child.vis != ty::Visibility::Public {
351 if let Some(child) = child.res.opt_def_id() {
352 match visible_parent_map.entry(child) {
353 Entry::Occupied(mut entry) => {
354 // If `child` is defined in crate `cnum`, ensure
355 // that it is mapped to a parent in `cnum`.
356 if child.krate == cnum && entry.get().krate != cnum {
357 entry.insert(parent);
360 Entry::Vacant(entry) => {
361 entry.insert(parent);
362 bfs_queue.push_back(child);
368 while let Some(def) = bfs_queue.pop_front() {
369 for child in tcx.item_children(def).iter() {
370 add_child(bfs_queue, child, def);
375 tcx.arena.alloc(visible_parent_map)
378 dependency_formats: |tcx, cnum| {
379 assert_eq!(cnum, LOCAL_CRATE);
380 Lrc::new(crate::dependency_format::calculate(tcx))
382 has_global_allocator: |tcx, cnum| {
383 assert_eq!(cnum, LOCAL_CRATE);
384 CStore::from_tcx(tcx).has_global_allocator()
386 postorder_cnums: |tcx, cnum| {
387 assert_eq!(cnum, LOCAL_CRATE);
388 tcx.arena.alloc_slice(&CStore::from_tcx(tcx).crate_dependencies_in_postorder(cnum))
396 pub fn struct_field_names_untracked(&self, def: DefId, sess: &Session) -> Vec<Spanned<Symbol>> {
397 self.get_crate_data(def.krate).get_struct_field_names(def.index, sess)
400 pub fn item_children_untracked(
404 ) -> Vec<Export<hir::HirId>> {
405 let mut result = vec![];
406 self.get_crate_data(def_id.krate).each_child_of_item(
408 |child| result.push(child),
414 pub fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro {
415 let _prof_timer = sess.prof.generic_activity("metadata_load_macro");
417 let data = self.get_crate_data(id.krate);
418 if data.root.is_proc_macro_crate() {
419 return LoadedMacro::ProcMacro(data.load_proc_macro(id.index, sess));
422 let def = data.get_macro(id.index);
423 let macro_full_name = data.def_path(id.index).to_string_friendly(|_| data.root.name);
424 let source_name = FileName::Macros(macro_full_name);
426 let source_file = sess.parse_sess.source_map().new_source_file(source_name, def.body);
427 let local_span = Span::with_root_ctxt(source_file.start_pos, source_file.end_pos);
428 let dspan = DelimSpan::from_single(local_span);
429 let (body, mut errors) = source_file_to_stream(&sess.parse_sess, source_file, None);
430 emit_unclosed_delims(&mut errors, &sess.parse_sess);
432 // Mark the attrs as used
433 let attrs = data.get_item_attrs(id.index, sess);
434 for attr in attrs.iter() {
435 attr::mark_used(attr);
443 .expect("no name in load_macro");
444 sess.imported_macro_spans
446 .insert(local_span, (name.to_string(), data.get_span(id.index, sess)));
448 LoadedMacro::MacroDef(
450 // FIXME: cross-crate hygiene
451 ident: ast::Ident::with_dummy_span(name),
452 id: ast::DUMMY_NODE_ID,
454 attrs: attrs.iter().cloned().collect(),
455 kind: ast::ItemKind::MacroDef(ast::MacroDef {
456 body: P(ast::MacArgs::Delimited(dspan, ast::MacDelimiter::Brace, body)),
459 vis: source_map::respan(local_span.shrink_to_lo(), ast::VisibilityKind::Inherited),
466 pub fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssocItem {
467 self.get_crate_data(def.krate).get_associated_item(def.index)
470 pub fn crate_source_untracked(&self, cnum: CrateNum) -> CrateSource {
471 self.get_crate_data(cnum).source.clone()
474 pub fn get_span_untracked(&self, def_id: DefId, sess: &Session) -> Span {
475 self.get_crate_data(def_id.krate).get_span(def_id.index, sess)
478 pub fn item_generics_num_lifetimes(&self, def_id: DefId, sess: &Session) -> usize {
479 self.get_crate_data(def_id.krate).get_generics(def_id.index, sess).own_counts().lifetimes
483 impl CrateStore for CStore {
484 fn as_any(&self) -> &dyn Any {
488 fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol {
489 self.get_crate_data(cnum).root.name
492 fn crate_is_private_dep_untracked(&self, cnum: CrateNum) -> bool {
493 self.get_crate_data(cnum).private_dep
496 fn crate_disambiguator_untracked(&self, cnum: CrateNum) -> CrateDisambiguator {
497 self.get_crate_data(cnum).root.disambiguator
500 fn crate_hash_untracked(&self, cnum: CrateNum) -> Svh {
501 self.get_crate_data(cnum).root.hash
504 /// Returns the `DefKey` for a given `DefId`. This indicates the
505 /// parent `DefId` as well as some idea of what kind of data the
506 /// `DefId` refers to.
507 fn def_key(&self, def: DefId) -> DefKey {
508 self.get_crate_data(def.krate).def_key(def.index)
511 fn def_path(&self, def: DefId) -> DefPath {
512 self.get_crate_data(def.krate).def_path(def.index)
515 fn def_path_hash(&self, def: DefId) -> DefPathHash {
516 self.get_crate_data(def.krate).def_path_hash(def.index)
519 fn def_path_table(&self, cnum: CrateNum) -> &DefPathTable {
520 &self.get_crate_data(cnum).def_path_table
523 fn crates_untracked(&self) -> Vec<CrateNum> {
524 let mut result = vec![];
525 self.iter_crate_data(|cnum, _| result.push(cnum));
529 fn encode_metadata(&self, tcx: TyCtxt<'_>) -> EncodedMetadata {
530 encoder::encode_metadata(tcx)
533 fn metadata_encoding_version(&self) -> &[u8] {
534 rmeta::METADATA_HEADER
537 fn allocator_kind(&self) -> Option<AllocatorKind> {
538 self.allocator_kind()