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;
45 macro_rules! provide {
46 (<$lt:tt> $tcx:ident, $def_id:ident, $other:ident, $cdata:ident,
47 $($name:ident => $compute:block)*) => {
48 pub fn provide<$lt>(providers: &mut Providers<$lt>) {
49 $(fn $name<'a, $lt:$lt, T>($tcx: TyCtxt<'a, $lt, $lt>, def_id_arg: T)
50 -> <ty::queries::$name<$lt> as
54 #[allow(unused_variables)]
55 let ($def_id, $other) = def_id_arg.into_args();
56 assert!(!$def_id.is_local());
58 let def_path_hash = $tcx.def_path_hash($def_id);
59 let dep_node = def_path_hash.to_dep_node(::rustc::dep_graph::DepKind::MetaData);
61 $tcx.dep_graph.read(dep_node);
63 let $cdata = $tcx.sess.cstore.crate_data_as_rc_any($def_id.krate);
64 let $cdata = $cdata.downcast_ref::<cstore::CrateMetadata>()
65 .expect("CrateStore crated ata is not a CrateMetadata");
69 *providers = Providers {
77 // small trait to work around different signature queries all being defined via
80 fn into_args(self) -> (DefId, DefId);
83 impl IntoArgs for DefId {
84 fn into_args(self) -> (DefId, DefId) { (self, self) }
87 impl IntoArgs for CrateNum {
88 fn into_args(self) -> (DefId, DefId) { (self.as_def_id(), self.as_def_id()) }
91 impl IntoArgs for (CrateNum, DefId) {
92 fn into_args(self) -> (DefId, DefId) { (self.0.as_def_id(), self.1) }
95 provide! { <'tcx> tcx, def_id, other, cdata,
96 type_of => { cdata.get_type(def_id.index, tcx) }
97 generics_of => { tcx.alloc_generics(cdata.get_generics(def_id.index)) }
98 predicates_of => { cdata.get_predicates(def_id.index, tcx) }
99 super_predicates_of => { cdata.get_super_predicates(def_id.index, tcx) }
101 tcx.alloc_trait_def(cdata.get_trait_def(def_id.index))
103 adt_def => { cdata.get_adt_def(def_id.index, tcx) }
106 tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
108 variances_of => { Rc::new(cdata.get_item_variances(def_id.index)) }
109 associated_item_def_ids => {
110 let mut result = vec![];
111 cdata.each_child_of_item(def_id.index,
112 |child| result.push(child.def.def_id()), tcx.sess);
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);
124 let mir = cdata.maybe_get_optimized_mir(tcx, def_id.index).unwrap_or_else(|| {
125 bug!("get_optimized_mir: missing MIR for `{:?}`", def_id)
128 let mir = tcx.alloc_mir(mir);
132 generator_sig => { cdata.generator_sig(def_id.index, tcx) }
133 mir_const_qualif => {
134 (cdata.mir_const_qualif(def_id.index), Rc::new(IdxSetBuf::new_empty(0)))
136 typeck_tables_of => { cdata.item_body_tables(def_id.index, tcx) }
137 closure_kind => { cdata.closure_kind(def_id.index) }
138 fn_sig => { cdata.fn_sig(def_id.index, tcx) }
139 inherent_impls => { Rc::new(cdata.get_inherent_implementations_for_type(def_id.index)) }
140 is_const_fn => { cdata.is_const_fn(def_id.index) }
141 is_foreign_item => { cdata.is_foreign_item(def_id.index) }
142 is_default_impl => { cdata.is_default_impl(def_id.index) }
143 describe_def => { cdata.get_def(def_id.index) }
144 def_span => { cdata.get_span(def_id.index, &tcx.sess) }
145 lookup_stability => {
146 cdata.get_stability(def_id.index).map(|s| tcx.intern_stability(s))
148 lookup_deprecation_entry => {
149 cdata.get_deprecation(def_id.index).map(DeprecationEntry::external)
151 item_attrs => { cdata.get_item_attrs(def_id.index, &tcx.dep_graph) }
152 // FIXME(#38501) We've skipped a `read` on the `HirBody` of
153 // a `fn` when encoding, so the dep-tracking wouldn't work.
154 // This is only used by rustdoc anyway, which shouldn't have
155 // incremental recompilation ever enabled.
156 fn_arg_names => { cdata.get_fn_arg_names(def_id.index) }
157 impl_parent => { cdata.get_parent_impl(def_id.index) }
158 trait_of_item => { cdata.get_trait_of_item(def_id.index) }
159 is_exported_symbol => {
160 let dep_node = cdata.metadata_dep_node(GlobalMetaDataKind::ExportedSymbols);
161 cdata.exported_symbols.get(&tcx.dep_graph, dep_node).contains(&def_id.index)
163 item_body_nested_bodies => { Rc::new(cdata.item_body_nested_bodies(def_id.index)) }
164 const_is_rvalue_promotable_to_static => {
165 cdata.const_is_rvalue_promotable_to_static(def_id.index)
167 is_mir_available => { cdata.is_item_mir_available(def_id.index) }
169 dylib_dependency_formats => { Rc::new(cdata.get_dylib_dependency_formats(&tcx.dep_graph)) }
170 is_panic_runtime => { cdata.is_panic_runtime(&tcx.dep_graph) }
171 is_compiler_builtins => { cdata.is_compiler_builtins(&tcx.dep_graph) }
172 has_global_allocator => { cdata.has_global_allocator(&tcx.dep_graph) }
173 is_sanitizer_runtime => { cdata.is_sanitizer_runtime(&tcx.dep_graph) }
174 is_profiler_runtime => { cdata.is_profiler_runtime(&tcx.dep_graph) }
175 panic_strategy => { cdata.panic_strategy(&tcx.dep_graph) }
176 extern_crate => { Rc::new(cdata.extern_crate.get()) }
177 is_no_builtins => { cdata.is_no_builtins(&tcx.dep_graph) }
178 impl_defaultness => { cdata.get_impl_defaultness(def_id.index) }
179 exported_symbols => { Rc::new(cdata.get_exported_symbols(&tcx.dep_graph)) }
180 native_libraries => { Rc::new(cdata.get_native_libraries(&tcx.dep_graph)) }
181 plugin_registrar_fn => {
182 cdata.root.plugin_registrar_fn.map(|index| {
183 DefId { krate: def_id.krate, index }
186 derive_registrar_fn => {
187 cdata.root.macro_derive_registrar.map(|index| {
188 DefId { krate: def_id.krate, index }
191 crate_disambiguator => { cdata.disambiguator() }
192 crate_hash => { cdata.hash() }
193 original_crate_name => { cdata.name() }
195 implementations_of_trait => {
196 let mut result = vec![];
197 let filter = Some(other);
198 cdata.get_implementations_for_trait(filter, &tcx.dep_graph, &mut result);
202 all_trait_implementations => {
203 let mut result = vec![];
204 cdata.get_implementations_for_trait(None, &tcx.dep_graph, &mut result);
208 is_dllimport_foreign_item => {
209 cdata.is_dllimport_foreign_item(def_id.index, &tcx.dep_graph)
211 visibility => { cdata.get_visibility(def_id.index) }
212 dep_kind => { cdata.dep_kind.get() }
213 crate_name => { cdata.name }
215 let mut result = vec![];
216 cdata.each_child_of_item(def_id.index, |child| result.push(child), tcx.sess);
219 defined_lang_items => { Rc::new(cdata.get_lang_items(&tcx.dep_graph)) }
220 missing_lang_items => { Rc::new(cdata.get_missing_lang_items(&tcx.dep_graph)) }
222 extern_const_body => {
223 debug!("item_body({:?}): inlining item", def_id);
224 cdata.extern_const_body(tcx, def_id.index)
227 missing_extern_crate_item => {
228 match cdata.extern_crate.get() {
229 Some(extern_crate) if !extern_crate.direct => true,
234 used_crate_source => { Rc::new(cdata.source.clone()) }
237 pub fn provide_local<'tcx>(providers: &mut Providers<'tcx>) {
238 fn is_const_fn<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> bool {
239 let node_id = tcx.hir.as_local_node_id(def_id)
240 .expect("Non-local call to local provider is_const_fn");
242 if let Some(fn_like) = FnLikeNode::from_node(tcx.hir.get(node_id)) {
243 fn_like.constness() == hir::Constness::Const
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 {
254 is_dllimport_foreign_item: |tcx, id| {
255 tcx.native_library_kind(id) == Some(NativeLibraryKind::NativeUnknown)
257 is_statically_included_foreign_item: |tcx, id| {
258 match tcx.native_library_kind(id) {
259 Some(NativeLibraryKind::NativeStatic) |
260 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))
268 .find(|l| l.foreign_items.contains(&id.index))
271 native_libraries: |tcx, cnum| {
272 assert_eq!(cnum, LOCAL_CRATE);
273 Rc::new(native_libs::collect(tcx))
275 link_args: |tcx, cnum| {
276 assert_eq!(cnum, LOCAL_CRATE);
277 Rc::new(link_args::collect(tcx))
279 extern_mod_stmt_cnum: |tcx, id| {
280 let id = tcx.hir.definitions().find_node_for_hir_id(id);
281 tcx.sess.cstore.extern_mod_stmt_cnum_untracked(id)
284 // Returns a map from a sufficiently visible external item (i.e. an
285 // external item that is visible from at least one local module) to a
286 // sufficiently visible parent (considering modules that re-export the
287 // external item to be parents).
288 visible_parent_map: |tcx, cnum| {
289 use std::collections::vec_deque::VecDeque;
290 use std::collections::hash_map::Entry;
292 assert_eq!(cnum, LOCAL_CRATE);
293 let mut visible_parent_map: DefIdMap<DefId> = DefIdMap();
295 for cnum in tcx.sess.cstore.crates() {
296 // Ignore crates without a corresponding local `extern crate` item.
297 if tcx.missing_extern_crate_item(cnum) {
301 let bfs_queue = &mut VecDeque::new();
302 let visible_parent_map = &mut visible_parent_map;
303 let mut add_child = |bfs_queue: &mut VecDeque<_>,
306 let child = child.def.def_id();
308 if tcx.visibility(child) != ty::Visibility::Public {
312 match visible_parent_map.entry(child) {
313 Entry::Occupied(mut entry) => {
314 // If `child` is defined in crate `cnum`, ensure
315 // that it is mapped to a parent in `cnum`.
316 if child.krate == cnum && entry.get().krate != cnum {
317 entry.insert(parent);
320 Entry::Vacant(entry) => {
321 entry.insert(parent);
322 bfs_queue.push_back(child);
327 bfs_queue.push_back(DefId {
329 index: CRATE_DEF_INDEX
331 while let Some(def) = bfs_queue.pop_front() {
332 for child in tcx.item_children(def).iter() {
333 add_child(bfs_queue, child, def);
338 Rc::new(visible_parent_map)
341 postorder_cnums: |tcx, cnum| {
342 assert_eq!(cnum, LOCAL_CRATE);
343 Rc::new(tcx.sess.cstore.postorder_cnums_untracked())
350 impl CrateStore for cstore::CStore {
351 fn crate_data_as_rc_any(&self, krate: CrateNum) -> Rc<Any> {
352 self.get_crate_data(krate)
355 fn metadata_loader(&self) -> &MetadataLoader {
356 &*self.metadata_loader
359 fn visibility_untracked(&self, def: DefId) -> ty::Visibility {
360 self.read_dep_node(def);
361 self.get_crate_data(def.krate).get_visibility(def.index)
364 fn item_generics_cloned_untracked(&self, def: DefId) -> ty::Generics {
365 self.read_dep_node(def);
366 self.get_crate_data(def.krate).get_generics(def.index)
369 fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssociatedItem
371 self.read_dep_node(def);
372 self.get_crate_data(def.krate).get_associated_item(def.index)
375 fn dep_kind_untracked(&self, cnum: CrateNum) -> DepKind
377 let data = self.get_crate_data(cnum);
378 let dep_node = data.metadata_dep_node(GlobalMetaDataKind::CrateDeps);
379 self.dep_graph.read(dep_node);
383 fn export_macros_untracked(&self, cnum: CrateNum) {
384 let data = self.get_crate_data(cnum);
385 let dep_node = data.metadata_dep_node(GlobalMetaDataKind::CrateDeps);
387 self.dep_graph.read(dep_node);
388 if data.dep_kind.get() == DepKind::UnexportedMacrosOnly {
389 data.dep_kind.set(DepKind::MacrosOnly)
393 fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol
395 self.get_crate_data(cnum).name
398 /// Returns the `DefKey` for a given `DefId`. This indicates the
399 /// parent `DefId` as well as some idea of what kind of data the
400 /// `DefId` refers to.
401 fn def_key(&self, def: DefId) -> DefKey {
402 // Note: loading the def-key (or def-path) for a def-id is not
403 // a *read* of its metadata. This is because the def-id is
404 // really just an interned shorthand for a def-path, which is the
405 // canonical name for an item.
407 // self.dep_graph.read(DepNode::MetaData(def));
408 self.get_crate_data(def.krate).def_key(def.index)
411 fn def_path(&self, def: DefId) -> DefPath {
412 // See `Note` above in `def_key()` for why this read is
415 // self.dep_graph.read(DepNode::MetaData(def));
416 self.get_crate_data(def.krate).def_path(def.index)
419 fn def_path_hash(&self, def: DefId) -> DefPathHash {
420 self.get_crate_data(def.krate).def_path_hash(def.index)
423 fn def_path_table(&self, cnum: CrateNum) -> Rc<DefPathTable> {
424 self.get_crate_data(cnum).def_path_table.clone()
427 fn struct_field_names_untracked(&self, def: DefId) -> Vec<ast::Name>
429 self.read_dep_node(def);
430 self.get_crate_data(def.krate).get_struct_field_names(def.index)
433 fn item_children_untracked(&self, def_id: DefId, sess: &Session) -> Vec<def::Export>
435 self.read_dep_node(def_id);
436 let mut result = vec![];
437 self.get_crate_data(def_id.krate)
438 .each_child_of_item(def_id.index, |child| result.push(child), sess);
442 fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro {
443 let data = self.get_crate_data(id.krate);
444 if let Some(ref proc_macros) = data.proc_macros {
445 return LoadedMacro::ProcMacro(proc_macros[id.index.as_usize() - 1].1.clone());
446 } else if data.name == "proc_macro" &&
447 self.get_crate_data(id.krate).item_name(id.index) == "quote" {
448 let ext = SyntaxExtension::ProcMacro(Box::new(::proc_macro::__internal::Quoter));
449 return LoadedMacro::ProcMacro(Rc::new(ext));
452 let (name, def) = data.get_macro(id.index);
453 let source_name = format!("<{} macros>", name);
455 let filemap = sess.parse_sess.codemap().new_filemap(source_name, def.body);
456 let local_span = Span::new(filemap.start_pos, filemap.end_pos, NO_EXPANSION);
457 let body = filemap_to_stream(&sess.parse_sess, filemap, None);
459 // Mark the attrs as used
460 let attrs = data.get_item_attrs(id.index, &self.dep_graph);
461 for attr in attrs.iter() {
462 attr::mark_used(attr);
465 let name = data.def_key(id.index).disambiguated_data.data
466 .get_opt_name().expect("no name in load_macro");
467 sess.imported_macro_spans.borrow_mut()
468 .insert(local_span, (name.to_string(), data.get_span(id.index, sess)));
470 LoadedMacro::MacroDef(ast::Item {
471 ident: ast::Ident::from_str(&name),
472 id: ast::DUMMY_NODE_ID,
474 attrs: attrs.iter().cloned().collect(),
475 node: ast::ItemKind::MacroDef(ast::MacroDef {
479 vis: ast::Visibility::Inherited,
484 fn crates(&self) -> Vec<CrateNum>
486 let mut result = vec![];
487 self.iter_crate_data(|cnum, _| result.push(cnum));
491 fn extern_mod_stmt_cnum_untracked(&self, emod_id: ast::NodeId) -> Option<CrateNum>
493 self.do_extern_mod_stmt_cnum(emod_id)
496 fn postorder_cnums_untracked(&self) -> Vec<CrateNum> {
497 self.do_postorder_cnums_untracked()
500 fn encode_metadata<'a, 'tcx>(&self,
501 tcx: TyCtxt<'a, 'tcx, 'tcx>,
502 link_meta: &LinkMeta,
504 -> (EncodedMetadata, EncodedMetadataHashes)
506 encoder::encode_metadata(tcx, link_meta, reachable)
509 fn metadata_encoding_version(&self) -> &[u8]
511 schema::METADATA_HEADER