1 use crate::cstore::{self, LoadedMacro};
3 use crate::native_libs;
4 use crate::foreign_modules;
5 use crate::rmeta::{self, encoder};
7 use rustc::ty::query::QueryConfig;
8 use rustc::middle::cstore::{CrateSource, CrateStore, DepKind, EncodedMetadata, NativeLibraryKind};
9 use rustc::middle::exported_symbols::ExportedSymbol;
10 use rustc::middle::stability::DeprecationEntry;
13 use rustc::session::{CrateDisambiguator, Session};
14 use rustc::ty::{self, TyCtxt};
15 use rustc::ty::query::Providers;
16 use rustc::hir::def_id::{CrateNum, DefId, LOCAL_CRATE, CRATE_DEF_INDEX};
17 use rustc::hir::map::{DefKey, DefPath, DefPathHash};
18 use rustc::hir::map::definitions::DefPathTable;
19 use rustc::util::nodemap::DefIdMap;
20 use rustc_data_structures::svh::Svh;
21 use rustc_parse::source_file_to_stream;
22 use rustc_parse::parser::emit_unclosed_delims;
24 use smallvec::SmallVec;
26 use rustc_data_structures::sync::Lrc;
31 use syntax::source_map;
32 use syntax::source_map::Spanned;
33 use syntax::symbol::Symbol;
34 use syntax_pos::{Span, FileName};
36 macro_rules! provide {
37 (<$lt:tt> $tcx:ident, $def_id:ident, $other:ident, $cdata:ident,
38 $($name:ident => $compute:block)*) => {
39 pub fn provide_extern<$lt>(providers: &mut Providers<$lt>) {
40 // HACK(eddyb) `$lt: $lt` forces `$lt` to be early-bound, which
41 // allows the associated type in the return type to be normalized.
42 $(fn $name<$lt: $lt, T: IntoArgs>(
45 ) -> <ty::queries::$name<$lt> as QueryConfig<$lt>>::Value {
47 $tcx.prof.generic_activity("metadata_decode_entry");
49 #[allow(unused_variables)]
50 let ($def_id, $other) = def_id_arg.into_args();
51 assert!(!$def_id.is_local());
53 let $cdata = $tcx.crate_data_as_any($def_id.krate);
54 let $cdata = $cdata.downcast_ref::<cstore::CrateMetadata>()
55 .expect("CrateStore created data is not a CrateMetadata");
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) { (self, self) }
83 impl IntoArgs for CrateNum {
84 fn into_args(self) -> (DefId, DefId) { (self.as_def_id(), self.as_def_id()) }
87 impl IntoArgs for (CrateNum, DefId) {
88 fn into_args(self) -> (DefId, DefId) { (self.0.as_def_id(), self.1) }
91 provide! { <'tcx> tcx, def_id, other, cdata,
92 type_of => { cdata.get_type(def_id.index, tcx) }
94 tcx.arena.alloc(cdata.get_generics(def_id.index, tcx.sess))
96 explicit_predicates_of => { cdata.get_explicit_predicates(def_id.index, tcx) }
97 inferred_outlives_of => { cdata.get_inferred_outlives(def_id.index, tcx) }
98 super_predicates_of => { cdata.get_super_predicates(def_id.index, tcx) }
100 tcx.arena.alloc(cdata.get_trait_def(def_id.index, tcx.sess))
102 adt_def => { cdata.get_adt_def(def_id.index, tcx) }
105 tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
107 variances_of => { tcx.arena.alloc_from_iter(cdata.get_item_variances(def_id.index)) }
108 associated_item_def_ids => {
109 let mut result = SmallVec::<[_; 8]>::new();
110 cdata.each_child_of_item(def_id.index,
111 |child| result.push(child.res.def_id()), tcx.sess);
112 tcx.arena.alloc_slice(&result)
114 associated_item => { cdata.get_associated_item(def_id.index) }
115 impl_trait_ref => { cdata.get_impl_trait(def_id.index, tcx) }
116 impl_polarity => { cdata.get_impl_polarity(def_id.index) }
117 coerce_unsized_info => {
118 cdata.get_coerce_unsized_info(def_id.index).unwrap_or_else(|| {
119 bug!("coerce_unsized_info: `{:?}` is missing its info", def_id);
122 optimized_mir => { tcx.arena.alloc(cdata.get_optimized_mir(tcx, def_id.index)) }
123 promoted_mir => { tcx.arena.alloc(cdata.get_promoted_mir(tcx, def_id.index)) }
124 mir_const_qualif => { cdata.mir_const_qualif(def_id.index) }
125 fn_sig => { cdata.fn_sig(def_id.index, tcx) }
126 inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) }
127 is_const_fn_raw => { cdata.is_const_fn_raw(def_id.index) }
128 asyncness => { cdata.asyncness(def_id.index) }
129 is_foreign_item => { cdata.is_foreign_item(def_id.index) }
130 static_mutability => { cdata.static_mutability(def_id.index) }
131 def_kind => { cdata.def_kind(def_id.index) }
132 def_span => { cdata.get_span(def_id.index, &tcx.sess) }
133 lookup_stability => {
134 cdata.get_stability(def_id.index).map(|s| tcx.intern_stability(s))
136 lookup_deprecation_entry => {
137 cdata.get_deprecation(def_id.index).map(DeprecationEntry::external)
139 item_attrs => { cdata.get_item_attrs(def_id.index, tcx.sess) }
140 // FIXME(#38501) We've skipped a `read` on the `HirBody` of
141 // a `fn` when encoding, so the dep-tracking wouldn't work.
142 // This is only used by rustdoc anyway, which shouldn't have
143 // incremental recompilation ever enabled.
144 fn_arg_names => { cdata.get_fn_param_names(def_id.index) }
145 rendered_const => { cdata.get_rendered_const(def_id.index) }
146 impl_parent => { cdata.get_parent_impl(def_id.index) }
147 trait_of_item => { cdata.get_trait_of_item(def_id.index) }
148 is_mir_available => { cdata.is_item_mir_available(def_id.index) }
150 dylib_dependency_formats => { cdata.get_dylib_dependency_formats(tcx) }
151 is_panic_runtime => { cdata.root.panic_runtime }
152 is_compiler_builtins => { cdata.root.compiler_builtins }
153 has_global_allocator => { cdata.root.has_global_allocator }
154 has_panic_handler => { cdata.root.has_panic_handler }
155 is_sanitizer_runtime => { cdata.root.sanitizer_runtime }
156 is_profiler_runtime => { cdata.root.profiler_runtime }
157 panic_strategy => { cdata.root.panic_strategy }
159 let r = *cdata.extern_crate.lock();
160 r.map(|c| &*tcx.arena.alloc(c))
162 is_no_builtins => { cdata.root.no_builtins }
163 symbol_mangling_version => { cdata.root.symbol_mangling_version }
164 impl_defaultness => { cdata.get_impl_defaultness(def_id.index) }
165 reachable_non_generics => {
166 let reachable_non_generics = tcx
167 .exported_symbols(cdata.cnum)
169 .filter_map(|&(exported_symbol, export_level)| {
170 if let ExportedSymbol::NonGeneric(def_id) = exported_symbol {
171 return Some((def_id, export_level))
178 tcx.arena.alloc(reachable_non_generics)
180 native_libraries => { Lrc::new(cdata.get_native_libraries(tcx.sess)) }
181 foreign_modules => { cdata.get_foreign_modules(tcx) }
182 plugin_registrar_fn => {
183 cdata.root.plugin_registrar_fn.map(|index| {
184 DefId { krate: def_id.krate, index }
187 proc_macro_decls_static => {
188 cdata.root.proc_macro_decls_static.map(|index| {
189 DefId { krate: def_id.krate, index }
192 crate_disambiguator => { cdata.root.disambiguator }
193 crate_hash => { cdata.root.hash }
194 original_crate_name => { cdata.root.name }
196 extra_filename => { cdata.root.extra_filename.clone() }
198 implementations_of_trait => {
199 cdata.get_implementations_for_trait(tcx, Some(other))
202 all_trait_implementations => {
203 cdata.get_implementations_for_trait(tcx, None)
206 visibility => { cdata.get_visibility(def_id.index) }
208 let r = *cdata.dep_kind.lock();
211 crate_name => { cdata.root.name }
213 let mut result = SmallVec::<[_; 8]>::new();
214 cdata.each_child_of_item(def_id.index, |child| result.push(child), tcx.sess);
215 tcx.arena.alloc_slice(&result)
217 defined_lib_features => { cdata.get_lib_features(tcx) }
218 defined_lang_items => { cdata.get_lang_items(tcx) }
219 diagnostic_items => { cdata.get_diagnostic_items(tcx) }
220 missing_lang_items => { cdata.get_missing_lang_items(tcx) }
222 missing_extern_crate_item => {
223 let r = match *cdata.extern_crate.borrow() {
224 Some(extern_crate) if !extern_crate.is_direct() => true,
230 used_crate_source => { Lrc::new(cdata.source.clone()) }
232 exported_symbols => {
233 let syms = cdata.exported_symbols(tcx);
235 // FIXME rust-lang/rust#64319, rust-lang/rust#64872: We want
236 // to block export of generics from dylibs, but we must fix
237 // rust-lang/rust#65890 before we can do that robustly.
243 pub fn provide(providers: &mut Providers<'_>) {
244 // FIXME(#44234) - almost all of these queries have no sub-queries and
245 // therefore no actual inputs, they're just reading tables calculated in
246 // resolve! Does this work? Unsure! That's what the issue is about
247 *providers = Providers {
248 is_dllimport_foreign_item: |tcx, id| {
249 match tcx.native_library_kind(id) {
250 Some(NativeLibraryKind::NativeUnknown) |
251 Some(NativeLibraryKind::NativeRawDylib) => true,
255 is_statically_included_foreign_item: |tcx, id| {
256 match tcx.native_library_kind(id) {
257 Some(NativeLibraryKind::NativeStatic) |
258 Some(NativeLibraryKind::NativeStaticNobundle) => true,
262 native_library_kind: |tcx, id| {
263 tcx.native_libraries(id.krate)
265 .filter(|lib| native_libs::relevant_lib(&tcx.sess, lib))
267 let fm_id = match lib.foreign_module {
269 None => return false,
271 tcx.foreign_modules(id.krate)
273 .find(|m| m.def_id == fm_id)
274 .expect("failed to find foreign module")
280 native_libraries: |tcx, cnum| {
281 assert_eq!(cnum, LOCAL_CRATE);
282 Lrc::new(native_libs::collect(tcx))
284 foreign_modules: |tcx, cnum| {
285 assert_eq!(cnum, LOCAL_CRATE);
286 &tcx.arena.alloc(foreign_modules::collect(tcx))[..]
288 link_args: |tcx, cnum| {
289 assert_eq!(cnum, LOCAL_CRATE);
290 Lrc::new(link_args::collect(tcx))
293 // Returns a map from a sufficiently visible external item (i.e., an
294 // external item that is visible from at least one local module) to a
295 // sufficiently visible parent (considering modules that re-export the
296 // external item to be parents).
297 visible_parent_map: |tcx, cnum| {
298 use std::collections::vec_deque::VecDeque;
299 use std::collections::hash_map::Entry;
301 assert_eq!(cnum, LOCAL_CRATE);
302 let mut visible_parent_map: DefIdMap<DefId> = Default::default();
304 // Issue 46112: We want the map to prefer the shortest
305 // paths when reporting the path to an item. Therefore we
306 // build up the map via a breadth-first search (BFS),
307 // which naturally yields minimal-length paths.
309 // Note that it needs to be a BFS over the whole forest of
310 // crates, not just each individual crate; otherwise you
311 // only get paths that are locally minimal with respect to
312 // whatever crate we happened to encounter first in this
313 // traversal, but not globally minimal across all crates.
314 let bfs_queue = &mut VecDeque::new();
316 // Preferring shortest paths alone does not guarantee a
317 // deterministic result; so sort by crate num to avoid
318 // hashtable iteration non-determinism. This only makes
319 // things as deterministic as crate-nums assignment is,
320 // which is to say, its not deterministic in general. But
321 // we believe that libstd is consistently assigned crate
322 // num 1, so it should be enough to resolve #46112.
323 let mut crates: Vec<CrateNum> = (*tcx.crates()).to_owned();
326 for &cnum in crates.iter() {
327 // Ignore crates without a corresponding local `extern crate` item.
328 if tcx.missing_extern_crate_item(cnum) {
332 bfs_queue.push_back(DefId {
334 index: CRATE_DEF_INDEX
338 // (restrict scope of mutable-borrow of `visible_parent_map`)
340 let visible_parent_map = &mut visible_parent_map;
341 let mut add_child = |bfs_queue: &mut VecDeque<_>,
342 child: &def::Export<hir::HirId>,
344 if child.vis != ty::Visibility::Public {
348 if let Some(child) = child.res.opt_def_id() {
349 match visible_parent_map.entry(child) {
350 Entry::Occupied(mut entry) => {
351 // If `child` is defined in crate `cnum`, ensure
352 // that it is mapped to a parent in `cnum`.
353 if child.krate == cnum && entry.get().krate != cnum {
354 entry.insert(parent);
357 Entry::Vacant(entry) => {
358 entry.insert(parent);
359 bfs_queue.push_back(child);
365 while let Some(def) = bfs_queue.pop_front() {
366 for child in tcx.item_children(def).iter() {
367 add_child(bfs_queue, child, def);
372 tcx.arena.alloc(visible_parent_map)
375 dependency_formats: |tcx, cnum| {
376 assert_eq!(cnum, LOCAL_CRATE);
377 Lrc::new(crate::dependency_format::calculate(tcx))
384 impl cstore::CStore {
385 pub fn export_macros_untracked(&self, cnum: CrateNum) {
386 let data = self.get_crate_data(cnum);
387 let mut dep_kind = data.dep_kind.lock();
388 if *dep_kind == DepKind::UnexportedMacrosOnly {
389 *dep_kind = DepKind::MacrosOnly;
393 pub fn struct_field_names_untracked(&self, def: DefId, sess: &Session) -> Vec<Spanned<Symbol>> {
394 self.get_crate_data(def.krate).get_struct_field_names(def.index, sess)
397 pub fn item_children_untracked(
401 ) -> Vec<def::Export<hir::HirId>> {
402 let mut result = vec![];
403 self.get_crate_data(def_id.krate)
404 .each_child_of_item(def_id.index, |child| result.push(child), sess);
408 pub fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro {
409 let _prof_timer = sess.prof.generic_activity("metadata_load_macro");
411 let data = self.get_crate_data(id.krate);
412 if data.is_proc_macro_crate() {
413 return LoadedMacro::ProcMacro(data.load_proc_macro(id.index, sess));
416 let def = data.get_macro(id.index);
417 let macro_full_name = data.def_path(id.index).to_string_friendly(|_| data.root.name);
418 let source_name = FileName::Macros(macro_full_name);
420 let source_file = sess.parse_sess.source_map().new_source_file(source_name, def.body);
421 let local_span = Span::with_root_ctxt(source_file.start_pos, source_file.end_pos);
422 let (body, mut errors) = source_file_to_stream(&sess.parse_sess, source_file, None);
423 emit_unclosed_delims(&mut errors, &sess.parse_sess);
425 // Mark the attrs as used
426 let attrs = data.get_item_attrs(id.index, sess);
427 for attr in attrs.iter() {
428 attr::mark_used(attr);
431 let name = data.def_key(id.index).disambiguated_data.data
432 .get_opt_name().expect("no name in load_macro");
433 sess.imported_macro_spans.borrow_mut()
434 .insert(local_span, (name.to_string(), data.get_span(id.index, sess)));
436 LoadedMacro::MacroDef(ast::Item {
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 {
446 vis: source_map::respan(local_span.shrink_to_lo(), ast::VisibilityKind::Inherited),
448 }, data.root.edition)
451 pub fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssocItem {
452 self.get_crate_data(def.krate).get_associated_item(def.index)
455 pub fn crate_source_untracked(&self, cnum: CrateNum) -> CrateSource {
456 self.get_crate_data(cnum).source.clone()
460 impl CrateStore for cstore::CStore {
461 fn crate_data_as_any(&self, cnum: CrateNum) -> &dyn Any {
462 self.get_crate_data(cnum)
465 fn item_generics_cloned_untracked(&self, def: DefId, sess: &Session) -> ty::Generics {
466 self.get_crate_data(def.krate).get_generics(def.index, sess)
469 fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol
471 self.get_crate_data(cnum).root.name
474 fn crate_is_private_dep_untracked(&self, cnum: CrateNum) -> bool {
475 self.get_crate_data(cnum).private_dep
478 fn crate_disambiguator_untracked(&self, cnum: CrateNum) -> CrateDisambiguator
480 self.get_crate_data(cnum).root.disambiguator
483 fn crate_hash_untracked(&self, cnum: CrateNum) -> Svh
485 self.get_crate_data(cnum).root.hash
488 fn crate_host_hash_untracked(&self, cnum: CrateNum) -> Option<Svh> {
489 self.get_crate_data(cnum).host_hash
492 /// Returns the `DefKey` for a given `DefId`. This indicates the
493 /// parent `DefId` as well as some idea of what kind of data the
494 /// `DefId` refers to.
495 fn def_key(&self, def: DefId) -> DefKey {
496 self.get_crate_data(def.krate).def_key(def.index)
499 fn def_path(&self, def: DefId) -> DefPath {
500 self.get_crate_data(def.krate).def_path(def.index)
503 fn def_path_hash(&self, def: DefId) -> DefPathHash {
504 self.get_crate_data(def.krate).def_path_hash(def.index)
507 fn def_path_table(&self, cnum: CrateNum) -> &DefPathTable {
508 &self.get_crate_data(cnum).def_path_table
511 fn crates_untracked(&self) -> Vec<CrateNum>
513 let mut result = vec![];
514 self.iter_crate_data(|cnum, _| result.push(cnum));
518 fn postorder_cnums_untracked(&self) -> Vec<CrateNum> {
519 self.do_postorder_cnums_untracked()
522 fn encode_metadata(&self, tcx: TyCtxt<'_>) -> EncodedMetadata {
523 encoder::encode_metadata(tcx)
526 fn metadata_encoding_version(&self) -> &[u8]
528 rmeta::METADATA_HEADER