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.
15 use rustc::dep_graph::DepTrackingMapConfig;
16 use rustc::middle::cstore::{CrateStore, CrateSource, LibSource, DepKind,
17 ExternCrate, NativeLibrary, MetadataLoader, LinkMeta,
18 LinkagePreference, LoadedMacro, EncodedMetadata};
21 use rustc::middle::lang_items;
22 use rustc::session::Session;
23 use rustc::ty::{self, TyCtxt};
24 use rustc::ty::maps::Providers;
25 use rustc::hir::def_id::{CrateNum, DefId, DefIndex, CRATE_DEF_INDEX, LOCAL_CRATE};
27 use rustc::dep_graph::{DepNode, GlobalMetaDataKind};
28 use rustc::hir::map::{DefKey, DefPath, DisambiguatedDefPathData};
29 use rustc::util::nodemap::{NodeSet, DefIdMap};
30 use rustc_back::PanicStrategy;
37 use syntax::parse::filemap_to_stream;
38 use syntax::symbol::Symbol;
39 use syntax_pos::{Span, NO_EXPANSION};
40 use rustc::hir::svh::Svh;
43 macro_rules! provide {
44 (<$lt:tt> $tcx:ident, $def_id:ident, $cdata:ident $($name:ident => $compute:block)*) => {
45 pub fn provide<$lt>(providers: &mut Providers<$lt>) {
46 $(fn $name<'a, $lt:$lt>($tcx: TyCtxt<'a, $lt, $lt>, $def_id: DefId)
47 -> <ty::queries::$name<$lt> as
48 DepTrackingMapConfig>::Value {
49 assert!(!$def_id.is_local());
51 $tcx.dep_graph.read(DepNode::MetaData($def_id));
53 let $cdata = $tcx.sess.cstore.crate_data_as_rc_any($def_id.krate);
54 let $cdata = $cdata.downcast_ref::<cstore::CrateMetadata>()
55 .expect("CrateStore crated ata is not a CrateMetadata");
59 *providers = Providers {
67 provide! { <'tcx> tcx, def_id, cdata
68 type_of => { cdata.get_type(def_id.index, tcx) }
69 generics_of => { tcx.alloc_generics(cdata.get_generics(def_id.index)) }
70 predicates_of => { cdata.get_predicates(def_id.index, tcx) }
71 super_predicates_of => { cdata.get_super_predicates(def_id.index, tcx) }
73 tcx.alloc_trait_def(cdata.get_trait_def(def_id.index))
75 adt_def => { cdata.get_adt_def(def_id.index, tcx) }
78 tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
80 variances_of => { Rc::new(cdata.get_item_variances(def_id.index)) }
81 associated_item_def_ids => {
82 let mut result = vec![];
83 cdata.each_child_of_item(def_id.index, |child| result.push(child.def.def_id()));
86 associated_item => { cdata.get_associated_item(def_id.index) }
87 impl_trait_ref => { cdata.get_impl_trait(def_id.index, tcx) }
88 impl_polarity => { cdata.get_impl_polarity(def_id.index) }
89 coerce_unsized_info => {
90 cdata.get_coerce_unsized_info(def_id.index).unwrap_or_else(|| {
91 bug!("coerce_unsized_info: `{:?}` is missing its info", def_id);
95 let mir = cdata.maybe_get_optimized_mir(tcx, def_id.index).unwrap_or_else(|| {
96 bug!("get_optimized_mir: missing MIR for `{:?}`", def_id)
99 let mir = tcx.alloc_mir(mir);
103 mir_const_qualif => { cdata.mir_const_qualif(def_id.index) }
104 typeck_tables_of => { cdata.item_body_tables(def_id.index, tcx) }
105 closure_kind => { cdata.closure_kind(def_id.index) }
106 closure_type => { cdata.closure_ty(def_id.index, tcx) }
107 inherent_impls => { Rc::new(cdata.get_inherent_implementations_for_type(def_id.index)) }
108 is_foreign_item => { cdata.is_foreign_item(def_id.index) }
109 describe_def => { cdata.get_def(def_id.index) }
110 def_span => { cdata.get_span(def_id.index, &tcx.sess) }
111 stability => { cdata.get_stability(def_id.index) }
112 deprecation => { cdata.get_deprecation(def_id.index) }
113 item_attrs => { cdata.get_item_attrs(def_id.index, &tcx.dep_graph) }
114 // FIXME(#38501) We've skipped a `read` on the `HirBody` of
115 // a `fn` when encoding, so the dep-tracking wouldn't work.
116 // This is only used by rustdoc anyway, which shouldn't have
117 // incremental recompilation ever enabled.
118 fn_arg_names => { cdata.get_fn_arg_names(def_id.index) }
119 impl_parent => { cdata.get_parent_impl(def_id.index) }
120 trait_of_item => { cdata.get_trait_of_item(def_id.index) }
121 is_exported_symbol => {
122 let dep_node = cdata.metadata_dep_node(GlobalMetaDataKind::ExportedSymbols);
123 cdata.exported_symbols.get(&tcx.dep_graph, dep_node).contains(&def_id.index)
125 item_body_nested_bodies => { Rc::new(cdata.item_body_nested_bodies(def_id.index)) }
126 const_is_rvalue_promotable_to_static => {
127 cdata.const_is_rvalue_promotable_to_static(def_id.index)
129 is_mir_available => { cdata.is_item_mir_available(def_id.index) }
132 impl CrateStore for cstore::CStore {
133 fn crate_data_as_rc_any(&self, krate: CrateNum) -> Rc<Any> {
134 self.get_crate_data(krate)
137 fn metadata_loader(&self) -> &MetadataLoader {
138 &*self.metadata_loader
141 fn visibility(&self, def: DefId) -> ty::Visibility {
142 self.dep_graph.read(DepNode::MetaData(def));
143 self.get_crate_data(def.krate).get_visibility(def.index)
146 fn item_generics_cloned(&self, def: DefId) -> ty::Generics {
147 self.dep_graph.read(DepNode::MetaData(def));
148 self.get_crate_data(def.krate).get_generics(def.index)
151 fn implementations_of_trait(&self, filter: Option<DefId>) -> Vec<DefId>
153 let mut result = vec![];
155 self.iter_crate_data(|_, cdata| {
156 cdata.get_implementations_for_trait(filter, &self.dep_graph, &mut result)
161 fn impl_defaultness(&self, def: DefId) -> hir::Defaultness
163 self.dep_graph.read(DepNode::MetaData(def));
164 self.get_crate_data(def.krate).get_impl_defaultness(def.index)
167 fn associated_item_cloned(&self, def: DefId) -> ty::AssociatedItem
169 self.dep_graph.read(DepNode::MetaData(def));
170 self.get_crate_data(def.krate).get_associated_item(def.index)
173 fn is_const_fn(&self, did: DefId) -> bool
175 self.dep_graph.read(DepNode::MetaData(did));
176 self.get_crate_data(did.krate).is_const_fn(did.index)
179 fn is_default_impl(&self, impl_did: DefId) -> bool {
180 self.dep_graph.read(DepNode::MetaData(impl_did));
181 self.get_crate_data(impl_did.krate).is_default_impl(impl_did.index)
184 fn is_statically_included_foreign_item(&self, def_id: DefId) -> bool
186 self.do_is_statically_included_foreign_item(def_id)
189 fn is_dllimport_foreign_item(&self, def_id: DefId) -> bool {
190 if def_id.krate == LOCAL_CRATE {
191 self.dllimport_foreign_items.borrow().contains(&def_id.index)
193 self.get_crate_data(def_id.krate)
194 .is_dllimport_foreign_item(def_id.index, &self.dep_graph)
198 fn dylib_dependency_formats(&self, cnum: CrateNum)
199 -> Vec<(CrateNum, LinkagePreference)>
201 self.get_crate_data(cnum).get_dylib_dependency_formats(&self.dep_graph)
204 fn dep_kind(&self, cnum: CrateNum) -> DepKind
206 let data = self.get_crate_data(cnum);
207 let dep_node = data.metadata_dep_node(GlobalMetaDataKind::CrateDeps);
208 self.dep_graph.read(dep_node);
212 fn export_macros(&self, cnum: CrateNum) {
213 let data = self.get_crate_data(cnum);
214 let dep_node = data.metadata_dep_node(GlobalMetaDataKind::CrateDeps);
216 self.dep_graph.read(dep_node);
217 if data.dep_kind.get() == DepKind::UnexportedMacrosOnly {
218 data.dep_kind.set(DepKind::MacrosOnly)
222 fn lang_items(&self, cnum: CrateNum) -> Vec<(DefIndex, usize)>
224 self.get_crate_data(cnum).get_lang_items(&self.dep_graph)
227 fn missing_lang_items(&self, cnum: CrateNum)
228 -> Vec<lang_items::LangItem>
230 self.get_crate_data(cnum).get_missing_lang_items(&self.dep_graph)
233 fn is_allocator(&self, cnum: CrateNum) -> bool
235 self.get_crate_data(cnum).is_allocator(&self.dep_graph)
238 fn is_panic_runtime(&self, cnum: CrateNum) -> bool
240 self.get_crate_data(cnum).is_panic_runtime(&self.dep_graph)
243 fn is_compiler_builtins(&self, cnum: CrateNum) -> bool {
244 self.get_crate_data(cnum).is_compiler_builtins(&self.dep_graph)
247 fn is_sanitizer_runtime(&self, cnum: CrateNum) -> bool {
248 self.get_crate_data(cnum).is_sanitizer_runtime(&self.dep_graph)
251 fn panic_strategy(&self, cnum: CrateNum) -> PanicStrategy {
252 self.get_crate_data(cnum).panic_strategy(&self.dep_graph)
255 fn crate_name(&self, cnum: CrateNum) -> Symbol
257 self.get_crate_data(cnum).name
260 fn original_crate_name(&self, cnum: CrateNum) -> Symbol
262 self.get_crate_data(cnum).name()
265 fn extern_crate(&self, cnum: CrateNum) -> Option<ExternCrate>
267 self.get_crate_data(cnum).extern_crate.get()
270 fn crate_hash(&self, cnum: CrateNum) -> Svh
272 self.get_crate_hash(cnum)
275 fn crate_disambiguator(&self, cnum: CrateNum) -> Symbol
277 self.get_crate_data(cnum).disambiguator()
280 fn plugin_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>
282 self.get_crate_data(cnum).root.plugin_registrar_fn.map(|index| DefId {
288 fn derive_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>
290 self.get_crate_data(cnum).root.macro_derive_registrar.map(|index| DefId {
296 fn native_libraries(&self, cnum: CrateNum) -> Vec<NativeLibrary>
298 self.get_crate_data(cnum).get_native_libraries(&self.dep_graph)
301 fn exported_symbols(&self, cnum: CrateNum) -> Vec<DefId>
303 self.get_crate_data(cnum).get_exported_symbols(&self.dep_graph)
306 fn is_no_builtins(&self, cnum: CrateNum) -> bool {
307 self.get_crate_data(cnum).is_no_builtins(&self.dep_graph)
310 fn retrace_path(&self,
312 path: &[DisambiguatedDefPathData])
314 let cdata = self.get_crate_data(cnum);
317 .map(|index| DefId { krate: cnum, index: index })
320 /// Returns the `DefKey` for a given `DefId`. This indicates the
321 /// parent `DefId` as well as some idea of what kind of data the
322 /// `DefId` refers to.
323 fn def_key(&self, def: DefId) -> DefKey {
324 // Note: loading the def-key (or def-path) for a def-id is not
325 // a *read* of its metadata. This is because the def-id is
326 // really just an interned shorthand for a def-path, which is the
327 // canonical name for an item.
329 // self.dep_graph.read(DepNode::MetaData(def));
330 self.get_crate_data(def.krate).def_key(def.index)
333 fn def_path(&self, def: DefId) -> DefPath {
334 // See `Note` above in `def_key()` for why this read is
337 // self.dep_graph.read(DepNode::MetaData(def));
338 self.get_crate_data(def.krate).def_path(def.index)
341 fn def_path_hash(&self, def: DefId) -> ich::Fingerprint {
342 self.get_crate_data(def.krate).def_path_hash(def.index)
345 fn struct_field_names(&self, def: DefId) -> Vec<ast::Name>
347 self.dep_graph.read(DepNode::MetaData(def));
348 self.get_crate_data(def.krate).get_struct_field_names(def.index)
351 fn item_children(&self, def_id: DefId) -> Vec<def::Export>
353 self.dep_graph.read(DepNode::MetaData(def_id));
354 let mut result = vec![];
355 self.get_crate_data(def_id.krate)
356 .each_child_of_item(def_id.index, |child| result.push(child));
360 fn load_macro(&self, id: DefId, sess: &Session) -> LoadedMacro {
361 let data = self.get_crate_data(id.krate);
362 if let Some(ref proc_macros) = data.proc_macros {
363 return LoadedMacro::ProcMacro(proc_macros[id.index.as_usize() - 1].1.clone());
366 let (name, def) = data.get_macro(id.index);
367 let source_name = format!("<{} macros>", name);
369 let filemap = sess.parse_sess.codemap().new_filemap(source_name, def.body);
370 let local_span = Span { lo: filemap.start_pos, hi: filemap.end_pos, ctxt: NO_EXPANSION };
371 let body = filemap_to_stream(&sess.parse_sess, filemap);
373 // Mark the attrs as used
374 let attrs = data.get_item_attrs(id.index, &self.dep_graph);
375 for attr in attrs.iter() {
376 attr::mark_used(attr);
379 let name = data.def_key(id.index).disambiguated_data.data
380 .get_opt_name().expect("no name in load_macro");
381 sess.imported_macro_spans.borrow_mut()
382 .insert(local_span, (name.to_string(), data.get_span(id.index, sess)));
384 LoadedMacro::MacroDef(ast::Item {
385 ident: ast::Ident::with_empty_ctxt(name),
386 id: ast::DUMMY_NODE_ID,
388 attrs: attrs.iter().cloned().collect(),
389 node: ast::ItemKind::MacroDef(ast::MacroDef {
393 vis: ast::Visibility::Inherited,
397 fn item_body<'a, 'tcx>(&self,
398 tcx: TyCtxt<'a, 'tcx, 'tcx>,
401 if let Some(cached) = tcx.hir.get_inlined_body(def_id) {
405 self.dep_graph.read(DepNode::MetaData(def_id));
406 debug!("item_body({}): inlining item", tcx.item_path_str(def_id));
408 self.get_crate_data(def_id.krate).item_body(tcx, def_id.index)
411 fn crates(&self) -> Vec<CrateNum>
413 let mut result = vec![];
414 self.iter_crate_data(|cnum, _| result.push(cnum));
418 fn used_libraries(&self) -> Vec<NativeLibrary>
420 self.get_used_libraries().borrow().clone()
423 fn used_link_args(&self) -> Vec<String>
425 self.get_used_link_args().borrow().clone()
427 fn used_crates(&self, prefer: LinkagePreference) -> Vec<(CrateNum, LibSource)>
429 self.do_get_used_crates(prefer)
432 fn used_crate_source(&self, cnum: CrateNum) -> CrateSource
434 self.get_crate_data(cnum).source.clone()
437 fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<CrateNum>
439 self.do_extern_mod_stmt_cnum(emod_id)
442 fn encode_metadata<'a, 'tcx>(&self,
443 tcx: TyCtxt<'a, 'tcx, 'tcx>,
444 link_meta: &LinkMeta,
448 encoder::encode_metadata(tcx, link_meta, reachable)
451 fn metadata_encoding_version(&self) -> &[u8]
453 schema::METADATA_HEADER
456 /// Returns a map from a sufficiently visible external item (i.e. an external item that is
457 /// visible from at least one local module) to a sufficiently visible parent (considering
458 /// modules that re-export the external item to be parents).
459 fn visible_parent_map<'a>(&'a self) -> ::std::cell::Ref<'a, DefIdMap<DefId>> {
461 let visible_parent_map = self.visible_parent_map.borrow();
462 if !visible_parent_map.is_empty() {
463 return visible_parent_map;
467 use std::collections::vec_deque::VecDeque;
468 use std::collections::hash_map::Entry;
470 let mut visible_parent_map = self.visible_parent_map.borrow_mut();
472 for cnum in (1 .. self.next_crate_num().as_usize()).map(CrateNum::new) {
473 let cdata = self.get_crate_data(cnum);
475 match cdata.extern_crate.get() {
476 // Ignore crates without a corresponding local `extern crate` item.
477 Some(extern_crate) if !extern_crate.direct => continue,
481 let mut bfs_queue = &mut VecDeque::new();
482 let mut add_child = |bfs_queue: &mut VecDeque<_>, child: def::Export, parent: DefId| {
483 let child = child.def.def_id();
485 if self.visibility(child) != ty::Visibility::Public {
489 match visible_parent_map.entry(child) {
490 Entry::Occupied(mut entry) => {
491 // If `child` is defined in crate `cnum`, ensure
492 // that it is mapped to a parent in `cnum`.
493 if child.krate == cnum && entry.get().krate != cnum {
494 entry.insert(parent);
497 Entry::Vacant(entry) => {
498 entry.insert(parent);
499 bfs_queue.push_back(child);
504 bfs_queue.push_back(DefId {
506 index: CRATE_DEF_INDEX
508 while let Some(def) = bfs_queue.pop_front() {
509 for child in self.item_children(def) {
510 add_child(bfs_queue, child, def);
515 drop(visible_parent_map);
516 self.visible_parent_map.borrow()