1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
17 use rustc::ty::maps::QueryConfig;
18 use rustc::middle::cstore::{CrateStore, DepKind,
19 MetadataLoader, LinkMeta,
20 LoadedMacro, EncodedMetadata,
21 EncodedMetadataHashes, NativeLibraryKind};
22 use rustc::middle::stability::DeprecationEntry;
24 use rustc::session::Session;
25 use rustc::ty::{self, TyCtxt};
26 use rustc::ty::maps::Providers;
27 use rustc::hir::def_id::{CrateNum, DefId, LOCAL_CRATE, CRATE_DEF_INDEX};
28 use rustc::hir::map::{DefKey, DefPath, DefPathHash};
29 use rustc::hir::map::blocks::FnLikeNode;
30 use rustc::hir::map::definitions::{DefPathTable, GlobalMetaDataKind};
31 use rustc::util::nodemap::{NodeSet, DefIdMap};
38 use syntax::ext::base::SyntaxExtension;
39 use syntax::parse::filemap_to_stream;
40 use syntax::symbol::Symbol;
41 use syntax_pos::{Span, NO_EXPANSION};
42 use rustc_data_structures::indexed_set::IdxSetBuf;
43 use rustc::hir::svh::Svh;
46 macro_rules! provide {
47 (<$lt:tt> $tcx:ident, $def_id:ident, $other:ident, $cdata:ident,
48 $($name:ident => $compute:block)*) => {
49 pub fn provide<$lt>(providers: &mut Providers<$lt>) {
50 $(fn $name<'a, $lt:$lt, T>($tcx: TyCtxt<'a, $lt, $lt>, def_id_arg: T)
51 -> <ty::queries::$name<$lt> as
55 #[allow(unused_variables)]
56 let ($def_id, $other) = def_id_arg.into_args();
57 assert!(!$def_id.is_local());
59 let def_path_hash = $tcx.def_path_hash($def_id);
60 let dep_node = def_path_hash.to_dep_node(::rustc::dep_graph::DepKind::MetaData);
62 $tcx.dep_graph.read(dep_node);
64 let $cdata = $tcx.sess.cstore.crate_data_as_rc_any($def_id.krate);
65 let $cdata = $cdata.downcast_ref::<cstore::CrateMetadata>()
66 .expect("CrateStore crated ata is not a CrateMetadata");
70 *providers = Providers {
78 // small trait to work around different signature queries all being defined via
81 fn into_args(self) -> (DefId, DefId);
84 impl IntoArgs for DefId {
85 fn into_args(self) -> (DefId, DefId) { (self, self) }
88 impl IntoArgs for CrateNum {
89 fn into_args(self) -> (DefId, DefId) { (self.as_def_id(), self.as_def_id()) }
92 impl IntoArgs for (CrateNum, DefId) {
93 fn into_args(self) -> (DefId, DefId) { (self.0.as_def_id(), self.1) }
96 provide! { <'tcx> tcx, def_id, other, cdata,
97 type_of => { cdata.get_type(def_id.index, tcx) }
98 generics_of => { tcx.alloc_generics(cdata.get_generics(def_id.index)) }
99 predicates_of => { cdata.get_predicates(def_id.index, tcx) }
100 super_predicates_of => { cdata.get_super_predicates(def_id.index, tcx) }
102 tcx.alloc_trait_def(cdata.get_trait_def(def_id.index))
104 adt_def => { cdata.get_adt_def(def_id.index, tcx) }
107 tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
109 variances_of => { Rc::new(cdata.get_item_variances(def_id.index)) }
110 associated_item_def_ids => {
111 let mut result = vec![];
112 cdata.each_child_of_item(def_id.index,
113 |child| result.push(child.def.def_id()), tcx.sess);
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);
125 let mir = cdata.maybe_get_optimized_mir(tcx, def_id.index).unwrap_or_else(|| {
126 bug!("get_optimized_mir: missing MIR for `{:?}`", def_id)
129 let mir = tcx.alloc_mir(mir);
133 generator_sig => { cdata.generator_sig(def_id.index, tcx) }
134 mir_const_qualif => {
135 (cdata.mir_const_qualif(def_id.index), Rc::new(IdxSetBuf::new_empty(0)))
137 typeck_tables_of => { cdata.item_body_tables(def_id.index, tcx) }
138 closure_kind => { cdata.closure_kind(def_id.index) }
139 fn_sig => { cdata.fn_sig(def_id.index, tcx) }
140 inherent_impls => { Rc::new(cdata.get_inherent_implementations_for_type(def_id.index)) }
141 is_const_fn => { cdata.is_const_fn(def_id.index) }
142 is_foreign_item => { cdata.is_foreign_item(def_id.index) }
143 is_default_impl => { cdata.is_default_impl(def_id.index) }
144 describe_def => { cdata.get_def(def_id.index) }
145 def_span => { cdata.get_span(def_id.index, &tcx.sess) }
146 lookup_stability => {
147 cdata.get_stability(def_id.index).map(|s| tcx.intern_stability(s))
149 lookup_deprecation_entry => {
150 cdata.get_deprecation(def_id.index).map(DeprecationEntry::external)
152 item_attrs => { cdata.get_item_attrs(def_id.index, &tcx.dep_graph) }
153 // FIXME(#38501) We've skipped a `read` on the `HirBody` of
154 // a `fn` when encoding, so the dep-tracking wouldn't work.
155 // This is only used by rustdoc anyway, which shouldn't have
156 // incremental recompilation ever enabled.
157 fn_arg_names => { cdata.get_fn_arg_names(def_id.index) }
158 impl_parent => { cdata.get_parent_impl(def_id.index) }
159 trait_of_item => { cdata.get_trait_of_item(def_id.index) }
160 is_exported_symbol => {
161 let dep_node = cdata.metadata_dep_node(GlobalMetaDataKind::ExportedSymbols);
162 cdata.exported_symbols.get(&tcx.dep_graph, dep_node).contains(&def_id.index)
164 item_body_nested_bodies => { Rc::new(cdata.item_body_nested_bodies(def_id.index)) }
165 const_is_rvalue_promotable_to_static => {
166 cdata.const_is_rvalue_promotable_to_static(def_id.index)
168 is_mir_available => { cdata.is_item_mir_available(def_id.index) }
170 dylib_dependency_formats => { Rc::new(cdata.get_dylib_dependency_formats(&tcx.dep_graph)) }
171 is_panic_runtime => { cdata.is_panic_runtime(&tcx.dep_graph) }
172 is_compiler_builtins => { cdata.is_compiler_builtins(&tcx.dep_graph) }
173 has_global_allocator => { cdata.has_global_allocator(&tcx.dep_graph) }
174 is_sanitizer_runtime => { cdata.is_sanitizer_runtime(&tcx.dep_graph) }
175 is_profiler_runtime => { cdata.is_profiler_runtime(&tcx.dep_graph) }
176 panic_strategy => { cdata.panic_strategy(&tcx.dep_graph) }
177 extern_crate => { Rc::new(cdata.extern_crate.get()) }
178 is_no_builtins => { cdata.is_no_builtins(&tcx.dep_graph) }
179 impl_defaultness => { cdata.get_impl_defaultness(def_id.index) }
180 exported_symbols => { Rc::new(cdata.get_exported_symbols(&tcx.dep_graph)) }
181 native_libraries => { Rc::new(cdata.get_native_libraries(&tcx.dep_graph)) }
182 plugin_registrar_fn => {
183 cdata.root.plugin_registrar_fn.map(|index| {
184 DefId { krate: def_id.krate, index }
187 derive_registrar_fn => {
188 cdata.root.macro_derive_registrar.map(|index| {
189 DefId { krate: def_id.krate, index }
192 crate_disambiguator => { cdata.disambiguator() }
193 crate_hash => { cdata.hash() }
194 original_crate_name => { cdata.name() }
196 implementations_of_trait => {
197 let mut result = vec![];
198 let filter = Some(other);
199 cdata.get_implementations_for_trait(filter, &tcx.dep_graph, &mut result);
203 all_trait_implementations => {
204 let mut result = vec![];
205 cdata.get_implementations_for_trait(None, &tcx.dep_graph, &mut result);
209 is_dllimport_foreign_item => {
210 cdata.is_dllimport_foreign_item(def_id.index, &tcx.dep_graph)
212 visibility => { cdata.get_visibility(def_id.index) }
213 dep_kind => { cdata.dep_kind.get() }
214 crate_name => { cdata.name }
216 let mut result = vec![];
217 cdata.each_child_of_item(def_id.index, |child| result.push(child), tcx.sess);
220 defined_lang_items => { Rc::new(cdata.get_lang_items(&tcx.dep_graph)) }
221 missing_lang_items => { Rc::new(cdata.get_missing_lang_items(&tcx.dep_graph)) }
223 extern_const_body => {
224 debug!("item_body({:?}): inlining item", def_id);
225 cdata.extern_const_body(tcx, def_id.index)
228 missing_extern_crate_item => {
229 match cdata.extern_crate.get() {
230 Some(extern_crate) if !extern_crate.direct => true,
235 used_crate_source => { Rc::new(cdata.source.clone()) }
238 pub fn provide_local<'tcx>(providers: &mut Providers<'tcx>) {
239 fn is_const_fn<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> bool {
240 let node_id = tcx.hir.as_local_node_id(def_id)
241 .expect("Non-local call to local provider is_const_fn");
243 if let Some(fn_like) = FnLikeNode::from_node(tcx.hir.get(node_id)) {
244 fn_like.constness() == hir::Constness::Const
250 // FIXME(#44234) - almost all of these queries have no sub-queries and
251 // therefore no actual inputs, they're just reading tables calculated in
252 // resolve! Does this work? Unsure! That's what the issue is about
253 *providers = Providers {
255 is_dllimport_foreign_item: |tcx, id| {
256 tcx.native_library_kind(id) == Some(NativeLibraryKind::NativeUnknown)
258 is_statically_included_foreign_item: |tcx, id| {
259 match tcx.native_library_kind(id) {
260 Some(NativeLibraryKind::NativeStatic) |
261 Some(NativeLibraryKind::NativeStaticNobundle) => true,
265 native_library_kind: |tcx, id| {
266 tcx.native_libraries(id.krate)
268 .filter(|lib| native_libs::relevant_lib(&tcx.sess, lib))
269 .find(|l| l.foreign_items.contains(&id.index))
272 native_libraries: |tcx, cnum| {
273 assert_eq!(cnum, LOCAL_CRATE);
274 Rc::new(native_libs::collect(tcx))
276 link_args: |tcx, cnum| {
277 assert_eq!(cnum, LOCAL_CRATE);
278 Rc::new(link_args::collect(tcx))
280 extern_mod_stmt_cnum: |tcx, id| {
281 let id = tcx.hir.definitions().find_node_for_hir_id(id);
282 tcx.sess.cstore.extern_mod_stmt_cnum_untracked(id)
285 // Returns a map from a sufficiently visible external item (i.e. an
286 // external item that is visible from at least one local module) to a
287 // sufficiently visible parent (considering modules that re-export the
288 // external item to be parents).
289 visible_parent_map: |tcx, cnum| {
290 use std::collections::vec_deque::VecDeque;
291 use std::collections::hash_map::Entry;
293 assert_eq!(cnum, LOCAL_CRATE);
294 let mut visible_parent_map: DefIdMap<DefId> = DefIdMap();
296 for cnum in tcx.sess.cstore.crates() {
297 // Ignore crates without a corresponding local `extern crate` item.
298 if tcx.missing_extern_crate_item(cnum) {
302 let bfs_queue = &mut VecDeque::new();
303 let visible_parent_map = &mut visible_parent_map;
304 let mut add_child = |bfs_queue: &mut VecDeque<_>,
307 let child = child.def.def_id();
309 if tcx.visibility(child) != ty::Visibility::Public {
313 match visible_parent_map.entry(child) {
314 Entry::Occupied(mut entry) => {
315 // If `child` is defined in crate `cnum`, ensure
316 // that it is mapped to a parent in `cnum`.
317 if child.krate == cnum && entry.get().krate != cnum {
318 entry.insert(parent);
321 Entry::Vacant(entry) => {
322 entry.insert(parent);
323 bfs_queue.push_back(child);
328 bfs_queue.push_back(DefId {
330 index: CRATE_DEF_INDEX
332 while let Some(def) = bfs_queue.pop_front() {
333 for child in tcx.item_children(def).iter() {
334 add_child(bfs_queue, child, def);
339 Rc::new(visible_parent_map)
342 postorder_cnums: |tcx, cnum| {
343 assert_eq!(cnum, LOCAL_CRATE);
344 Rc::new(tcx.sess.cstore.postorder_cnums_untracked())
351 impl CrateStore for cstore::CStore {
352 fn crate_data_as_rc_any(&self, krate: CrateNum) -> Rc<Any> {
353 self.get_crate_data(krate)
356 fn metadata_loader(&self) -> &MetadataLoader {
357 &*self.metadata_loader
360 fn visibility_untracked(&self, def: DefId) -> ty::Visibility {
361 self.read_dep_node(def);
362 self.get_crate_data(def.krate).get_visibility(def.index)
365 fn item_generics_cloned_untracked(&self, def: DefId) -> ty::Generics {
366 self.read_dep_node(def);
367 self.get_crate_data(def.krate).get_generics(def.index)
370 fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssociatedItem
372 self.read_dep_node(def);
373 self.get_crate_data(def.krate).get_associated_item(def.index)
376 fn dep_kind_untracked(&self, cnum: CrateNum) -> DepKind
378 let data = self.get_crate_data(cnum);
379 let dep_node = data.metadata_dep_node(GlobalMetaDataKind::CrateDeps);
380 self.dep_graph.read(dep_node);
384 fn export_macros_untracked(&self, cnum: CrateNum) {
385 let data = self.get_crate_data(cnum);
386 let dep_node = data.metadata_dep_node(GlobalMetaDataKind::CrateDeps);
388 self.dep_graph.read(dep_node);
389 if data.dep_kind.get() == DepKind::UnexportedMacrosOnly {
390 data.dep_kind.set(DepKind::MacrosOnly)
394 fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol
396 self.get_crate_data(cnum).name
399 /// Returns the `DefKey` for a given `DefId`. This indicates the
400 /// parent `DefId` as well as some idea of what kind of data the
401 /// `DefId` refers to.
402 fn def_key(&self, def: DefId) -> DefKey {
403 // Note: loading the def-key (or def-path) for a def-id is not
404 // a *read* of its metadata. This is because the def-id is
405 // really just an interned shorthand for a def-path, which is the
406 // canonical name for an item.
408 // self.dep_graph.read(DepNode::MetaData(def));
409 self.get_crate_data(def.krate).def_key(def.index)
412 fn def_path(&self, def: DefId) -> DefPath {
413 // See `Note` above in `def_key()` for why this read is
416 // self.dep_graph.read(DepNode::MetaData(def));
417 self.get_crate_data(def.krate).def_path(def.index)
420 fn def_path_hash(&self, def: DefId) -> DefPathHash {
421 self.get_crate_data(def.krate).def_path_hash(def.index)
424 fn def_path_table(&self, cnum: CrateNum) -> Rc<DefPathTable> {
425 self.get_crate_data(cnum).def_path_table.clone()
428 fn struct_field_names_untracked(&self, def: DefId) -> Vec<ast::Name>
430 self.read_dep_node(def);
431 self.get_crate_data(def.krate).get_struct_field_names(def.index)
434 fn item_children_untracked(&self, def_id: DefId, sess: &Session) -> Vec<def::Export>
436 self.read_dep_node(def_id);
437 let mut result = vec![];
438 self.get_crate_data(def_id.krate)
439 .each_child_of_item(def_id.index, |child| result.push(child), sess);
443 fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro {
444 let data = self.get_crate_data(id.krate);
445 if let Some(ref proc_macros) = data.proc_macros {
446 return LoadedMacro::ProcMacro(proc_macros[id.index.as_usize() - 1].1.clone());
447 } else if data.name == "proc_macro" &&
448 self.get_crate_data(id.krate).item_name(id.index) == "quote" {
449 let ext = SyntaxExtension::ProcMacro(Box::new(::proc_macro::__internal::Quoter));
450 return LoadedMacro::ProcMacro(Rc::new(ext));
453 let (name, def) = data.get_macro(id.index);
454 let source_name = format!("<{} macros>", name);
456 let filemap = sess.parse_sess.codemap().new_filemap(source_name, def.body);
457 let local_span = Span::new(filemap.start_pos, filemap.end_pos, NO_EXPANSION);
458 let body = filemap_to_stream(&sess.parse_sess, filemap, None);
460 // Mark the attrs as used
461 let attrs = data.get_item_attrs(id.index, &self.dep_graph);
462 for attr in attrs.iter() {
463 attr::mark_used(attr);
466 let name = data.def_key(id.index).disambiguated_data.data
467 .get_opt_name().expect("no name in load_macro");
468 sess.imported_macro_spans.borrow_mut()
469 .insert(local_span, (name.to_string(), data.get_span(id.index, sess)));
471 LoadedMacro::MacroDef(ast::Item {
472 ident: ast::Ident::with_empty_ctxt(name),
473 id: ast::DUMMY_NODE_ID,
475 attrs: attrs.iter().cloned().collect(),
476 node: ast::ItemKind::MacroDef(ast::MacroDef {
480 vis: ast::Visibility::Inherited,
485 fn crates(&self) -> Vec<CrateNum>
487 let mut result = vec![];
488 self.iter_crate_data(|cnum, _| result.push(cnum));
492 fn extern_mod_stmt_cnum_untracked(&self, emod_id: ast::NodeId) -> Option<CrateNum>
494 self.do_extern_mod_stmt_cnum(emod_id)
497 fn postorder_cnums_untracked(&self) -> Vec<CrateNum> {
498 self.do_postorder_cnums_untracked()
501 fn encode_metadata<'a, 'tcx>(&self,
502 tcx: TyCtxt<'a, 'tcx, 'tcx>,
503 link_meta: &LinkMeta,
505 -> (EncodedMetadata, EncodedMetadataHashes)
507 encoder::encode_metadata(tcx, link_meta, reachable)
510 fn metadata_encoding_version(&self) -> &[u8]
512 schema::METADATA_HEADER