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.
16 use rustc::dep_graph::DepTrackingMapConfig;
17 use rustc::middle::cstore::{CrateStore, CrateSource, LibSource, DepKind,
18 ExternCrate, NativeLibrary, LinkMeta,
19 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;
41 use rustc_back::target::Target;
44 use std::collections::BTreeMap;
46 macro_rules! provide {
47 (<$lt:tt> $tcx:ident, $def_id:ident, $cdata:ident $($name:ident => $compute:block)*) => {
48 pub fn provide<$lt>(providers: &mut Providers<$lt>) {
49 $(fn $name<'a, $lt:$lt>($tcx: TyCtxt<'a, $lt, $lt>, $def_id: DefId)
50 -> <ty::queries::$name<$lt> as
51 DepTrackingMapConfig>::Value {
52 assert!(!$def_id.is_local());
54 $tcx.dep_graph.read(DepNode::MetaData($def_id));
56 let $cdata = $tcx.sess.cstore.crate_data_as_rc_any($def_id.krate);
57 let $cdata = $cdata.downcast_ref::<cstore::CrateMetadata>()
58 .expect("CrateStore crated ata is not a CrateMetadata");
62 *providers = Providers {
70 provide! { <'tcx> tcx, def_id, cdata
71 type_of => { cdata.get_type(def_id.index, tcx) }
72 generics_of => { tcx.alloc_generics(cdata.get_generics(def_id.index)) }
73 predicates_of => { cdata.get_predicates(def_id.index, tcx) }
74 super_predicates_of => { cdata.get_super_predicates(def_id.index, tcx) }
76 tcx.alloc_trait_def(cdata.get_trait_def(def_id.index))
78 adt_def => { cdata.get_adt_def(def_id.index, tcx) }
81 tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
83 variances_of => { Rc::new(cdata.get_item_variances(def_id.index)) }
84 associated_item_def_ids => {
85 let mut result = vec![];
86 cdata.each_child_of_item(def_id.index, |child| result.push(child.def.def_id()));
89 associated_item => { cdata.get_associated_item(def_id.index) }
90 impl_trait_ref => { cdata.get_impl_trait(def_id.index, tcx) }
91 impl_polarity => { cdata.get_impl_polarity(def_id.index) }
92 coerce_unsized_info => {
93 cdata.get_coerce_unsized_info(def_id.index).unwrap_or_else(|| {
94 bug!("coerce_unsized_info: `{:?}` is missing its info", def_id);
98 let mir = cdata.maybe_get_optimized_mir(tcx, def_id.index).unwrap_or_else(|| {
99 bug!("get_optimized_mir: missing MIR for `{:?}`", def_id)
102 let mir = tcx.alloc_mir(mir);
106 mir_const_qualif => { cdata.mir_const_qualif(def_id.index) }
107 typeck_tables_of => { cdata.item_body_tables(def_id.index, tcx) }
108 closure_kind => { cdata.closure_kind(def_id.index) }
109 closure_type => { cdata.closure_ty(def_id.index, tcx) }
110 inherent_impls => { Rc::new(cdata.get_inherent_implementations_for_type(def_id.index)) }
111 is_foreign_item => { cdata.is_foreign_item(def_id.index) }
112 describe_def => { cdata.get_def(def_id.index) }
113 def_span => { cdata.get_span(def_id.index, &tcx.sess) }
114 stability => { cdata.get_stability(def_id.index) }
115 deprecation => { cdata.get_deprecation(def_id.index) }
116 item_body_nested_bodies => {
117 let map: BTreeMap<_, _> = cdata.entry(def_id.index).ast.into_iter().flat_map(|ast| {
118 ast.decode(cdata).nested_bodies.decode(cdata).map(|body| (body.id(), body))
123 const_is_rvalue_promotable_to_static => {
124 cdata.entry(def_id.index).ast.expect("const item missing `ast`")
125 .decode(cdata).rvalue_promotable_to_static
127 is_mir_available => {
128 !cdata.is_proc_macro(def_id.index) &&
129 cdata.maybe_entry(def_id.index).and_then(|item| item.decode(cdata).mir).is_some()
133 impl CrateStore for cstore::CStore {
134 fn crate_data_as_rc_any(&self, krate: CrateNum) -> Rc<Any> {
135 self.get_crate_data(krate)
138 fn visibility(&self, def: DefId) -> ty::Visibility {
139 self.dep_graph.read(DepNode::MetaData(def));
140 self.get_crate_data(def.krate).get_visibility(def.index)
143 fn item_generics_cloned(&self, def: DefId) -> ty::Generics {
144 self.dep_graph.read(DepNode::MetaData(def));
145 self.get_crate_data(def.krate).get_generics(def.index)
148 fn item_attrs(&self, def_id: DefId) -> Rc<[ast::Attribute]>
150 self.get_crate_data(def_id.krate)
151 .get_item_attrs(def_id.index, &self.dep_graph)
154 fn fn_arg_names(&self, did: DefId) -> Vec<ast::Name>
156 // FIXME(#38501) We've skipped a `read` on the `HirBody` of
157 // a `fn` when encoding, so the dep-tracking wouldn't work.
158 // This is only used by rustdoc anyway, which shouldn't have
159 // incremental recompilation ever enabled.
160 assert!(!self.dep_graph.is_fully_enabled());
161 self.get_crate_data(did.krate).get_fn_arg_names(did.index)
164 fn implementations_of_trait(&self, filter: Option<DefId>) -> Vec<DefId>
166 if let Some(def_id) = filter {
167 self.dep_graph.read(DepNode::MetaData(def_id));
169 let mut result = vec![];
170 self.iter_crate_data(|_, cdata| {
171 cdata.get_implementations_for_trait(filter, &self.dep_graph, &mut result)
176 fn impl_defaultness(&self, def: DefId) -> hir::Defaultness
178 self.dep_graph.read(DepNode::MetaData(def));
179 self.get_crate_data(def.krate).get_impl_defaultness(def.index)
182 fn impl_parent(&self, impl_def: DefId) -> Option<DefId> {
183 self.dep_graph.read(DepNode::MetaData(impl_def));
184 self.get_crate_data(impl_def.krate).get_parent_impl(impl_def.index)
187 fn trait_of_item(&self, def_id: DefId) -> Option<DefId> {
188 self.dep_graph.read(DepNode::MetaData(def_id));
189 self.get_crate_data(def_id.krate).get_trait_of_item(def_id.index)
192 fn associated_item_cloned(&self, def: DefId) -> ty::AssociatedItem
194 self.dep_graph.read(DepNode::MetaData(def));
195 self.get_crate_data(def.krate).get_associated_item(def.index)
198 fn is_const_fn(&self, did: DefId) -> bool
200 self.dep_graph.read(DepNode::MetaData(did));
201 self.get_crate_data(did.krate).is_const_fn(did.index)
204 fn is_default_impl(&self, impl_did: DefId) -> bool {
205 self.dep_graph.read(DepNode::MetaData(impl_did));
206 self.get_crate_data(impl_did.krate).is_default_impl(impl_did.index)
209 fn is_foreign_item(&self, did: DefId) -> bool {
210 self.get_crate_data(did.krate).is_foreign_item(did.index)
213 fn is_statically_included_foreign_item(&self, def_id: DefId) -> bool
215 self.do_is_statically_included_foreign_item(def_id)
218 fn is_exported_symbol(&self, def_id: DefId) -> bool {
219 let data = self.get_crate_data(def_id.krate);
220 let dep_node = data.metadata_dep_node(GlobalMetaDataKind::ExportedSymbols);
221 data.exported_symbols
222 .get(&self.dep_graph, dep_node)
223 .contains(&def_id.index)
226 fn is_dllimport_foreign_item(&self, def_id: DefId) -> bool {
227 if def_id.krate == LOCAL_CRATE {
228 self.dllimport_foreign_items.borrow().contains(&def_id.index)
230 self.get_crate_data(def_id.krate)
231 .is_dllimport_foreign_item(def_id.index, &self.dep_graph)
235 fn dylib_dependency_formats(&self, cnum: CrateNum)
236 -> Vec<(CrateNum, LinkagePreference)>
238 self.get_crate_data(cnum).get_dylib_dependency_formats(&self.dep_graph)
241 fn dep_kind(&self, cnum: CrateNum) -> DepKind
243 let data = self.get_crate_data(cnum);
244 let dep_node = data.metadata_dep_node(GlobalMetaDataKind::CrateDeps);
245 self.dep_graph.read(dep_node);
249 fn export_macros(&self, cnum: CrateNum) {
250 let data = self.get_crate_data(cnum);
251 let dep_node = data.metadata_dep_node(GlobalMetaDataKind::CrateDeps);
253 self.dep_graph.read(dep_node);
254 if data.dep_kind.get() == DepKind::UnexportedMacrosOnly {
255 data.dep_kind.set(DepKind::MacrosOnly)
259 fn lang_items(&self, cnum: CrateNum) -> Vec<(DefIndex, usize)>
261 self.get_crate_data(cnum).get_lang_items(&self.dep_graph)
264 fn missing_lang_items(&self, cnum: CrateNum)
265 -> Vec<lang_items::LangItem>
267 self.get_crate_data(cnum).get_missing_lang_items(&self.dep_graph)
270 fn is_allocator(&self, cnum: CrateNum) -> bool
272 self.get_crate_data(cnum).is_allocator(&self.dep_graph)
275 fn is_panic_runtime(&self, cnum: CrateNum) -> bool
277 self.get_crate_data(cnum).is_panic_runtime(&self.dep_graph)
280 fn is_compiler_builtins(&self, cnum: CrateNum) -> bool {
281 self.get_crate_data(cnum).is_compiler_builtins(&self.dep_graph)
284 fn is_sanitizer_runtime(&self, cnum: CrateNum) -> bool {
285 self.get_crate_data(cnum).is_sanitizer_runtime(&self.dep_graph)
288 fn panic_strategy(&self, cnum: CrateNum) -> PanicStrategy {
289 self.get_crate_data(cnum).panic_strategy(&self.dep_graph)
292 fn crate_name(&self, cnum: CrateNum) -> Symbol
294 self.get_crate_data(cnum).name
297 fn original_crate_name(&self, cnum: CrateNum) -> Symbol
299 self.get_crate_data(cnum).name()
302 fn extern_crate(&self, cnum: CrateNum) -> Option<ExternCrate>
304 self.get_crate_data(cnum).extern_crate.get()
307 fn crate_hash(&self, cnum: CrateNum) -> Svh
309 self.get_crate_hash(cnum)
312 fn crate_disambiguator(&self, cnum: CrateNum) -> Symbol
314 self.get_crate_data(cnum).disambiguator()
317 fn plugin_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>
319 self.get_crate_data(cnum).root.plugin_registrar_fn.map(|index| DefId {
325 fn derive_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>
327 self.get_crate_data(cnum).root.macro_derive_registrar.map(|index| DefId {
333 fn native_libraries(&self, cnum: CrateNum) -> Vec<NativeLibrary>
335 self.get_crate_data(cnum).get_native_libraries(&self.dep_graph)
338 fn exported_symbols(&self, cnum: CrateNum) -> Vec<DefId>
340 self.get_crate_data(cnum).get_exported_symbols(&self.dep_graph)
343 fn is_no_builtins(&self, cnum: CrateNum) -> bool {
344 self.get_crate_data(cnum).is_no_builtins(&self.dep_graph)
347 fn retrace_path(&self,
349 path: &[DisambiguatedDefPathData])
351 let cdata = self.get_crate_data(cnum);
354 .map(|index| DefId { krate: cnum, index: index })
357 /// Returns the `DefKey` for a given `DefId`. This indicates the
358 /// parent `DefId` as well as some idea of what kind of data the
359 /// `DefId` refers to.
360 fn def_key(&self, def: DefId) -> DefKey {
361 // Note: loading the def-key (or def-path) for a def-id is not
362 // a *read* of its metadata. This is because the def-id is
363 // really just an interned shorthand for a def-path, which is the
364 // canonical name for an item.
366 // self.dep_graph.read(DepNode::MetaData(def));
367 self.get_crate_data(def.krate).def_key(def.index)
370 fn def_path(&self, def: DefId) -> DefPath {
371 // See `Note` above in `def_key()` for why this read is
374 // self.dep_graph.read(DepNode::MetaData(def));
375 self.get_crate_data(def.krate).def_path(def.index)
378 fn def_path_hash(&self, def: DefId) -> u64 {
379 self.get_crate_data(def.krate).def_path_hash(def.index)
382 fn struct_field_names(&self, def: DefId) -> Vec<ast::Name>
384 self.dep_graph.read(DepNode::MetaData(def));
385 self.get_crate_data(def.krate).get_struct_field_names(def.index)
388 fn item_children(&self, def_id: DefId) -> Vec<def::Export>
390 self.dep_graph.read(DepNode::MetaData(def_id));
391 let mut result = vec![];
392 self.get_crate_data(def_id.krate)
393 .each_child_of_item(def_id.index, |child| result.push(child));
397 fn load_macro(&self, id: DefId, sess: &Session) -> LoadedMacro {
398 let data = self.get_crate_data(id.krate);
399 if let Some(ref proc_macros) = data.proc_macros {
400 return LoadedMacro::ProcMacro(proc_macros[id.index.as_usize() - 1].1.clone());
403 let (name, def) = data.get_macro(id.index);
404 let source_name = format!("<{} macros>", name);
406 let filemap = sess.parse_sess.codemap().new_filemap(source_name, def.body);
407 let local_span = Span { lo: filemap.start_pos, hi: filemap.end_pos, ctxt: NO_EXPANSION };
408 let body = filemap_to_stream(&sess.parse_sess, filemap);
410 // Mark the attrs as used
411 let attrs = data.get_item_attrs(id.index, &self.dep_graph);
412 for attr in attrs.iter() {
413 attr::mark_used(attr);
416 let name = data.def_key(id.index).disambiguated_data.data
417 .get_opt_name().expect("no name in load_macro");
418 sess.imported_macro_spans.borrow_mut()
419 .insert(local_span, (name.to_string(), data.get_span(id.index, sess)));
421 LoadedMacro::MacroDef(ast::Item {
422 ident: ast::Ident::with_empty_ctxt(name),
423 id: ast::DUMMY_NODE_ID,
425 attrs: attrs.iter().cloned().collect(),
426 node: ast::ItemKind::MacroDef(body.into()),
427 vis: ast::Visibility::Inherited,
431 fn item_body<'a, 'tcx>(&self,
432 tcx: TyCtxt<'a, 'tcx, 'tcx>,
435 if let Some(cached) = tcx.hir.get_inlined_body(def_id) {
439 self.dep_graph.read(DepNode::MetaData(def_id));
440 debug!("item_body({}): inlining item", tcx.item_path_str(def_id));
442 self.get_crate_data(def_id.krate).item_body(tcx, def_id.index)
445 fn crates(&self) -> Vec<CrateNum>
447 let mut result = vec![];
448 self.iter_crate_data(|cnum, _| result.push(cnum));
452 fn used_libraries(&self) -> Vec<NativeLibrary>
454 self.get_used_libraries().borrow().clone()
457 fn used_link_args(&self) -> Vec<String>
459 self.get_used_link_args().borrow().clone()
462 fn metadata_filename(&self) -> &str
464 locator::METADATA_FILENAME
467 fn metadata_section_name(&self, target: &Target) -> &str
469 locator::meta_section_name(target)
472 fn used_crates(&self, prefer: LinkagePreference) -> Vec<(CrateNum, LibSource)>
474 self.do_get_used_crates(prefer)
477 fn used_crate_source(&self, cnum: CrateNum) -> CrateSource
479 self.get_crate_data(cnum).source.clone()
482 fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<CrateNum>
484 self.do_extern_mod_stmt_cnum(emod_id)
487 fn encode_metadata<'a, 'tcx>(&self,
488 tcx: TyCtxt<'a, 'tcx, 'tcx>,
489 link_meta: &LinkMeta,
493 encoder::encode_metadata(tcx, link_meta, reachable)
496 fn metadata_encoding_version(&self) -> &[u8]
498 schema::METADATA_HEADER
501 /// Returns a map from a sufficiently visible external item (i.e. an external item that is
502 /// visible from at least one local module) to a sufficiently visible parent (considering
503 /// modules that re-export the external item to be parents).
504 fn visible_parent_map<'a>(&'a self) -> ::std::cell::Ref<'a, DefIdMap<DefId>> {
506 let visible_parent_map = self.visible_parent_map.borrow();
507 if !visible_parent_map.is_empty() {
508 return visible_parent_map;
512 use std::collections::vec_deque::VecDeque;
513 use std::collections::hash_map::Entry;
515 let mut visible_parent_map = self.visible_parent_map.borrow_mut();
517 for cnum in (1 .. self.next_crate_num().as_usize()).map(CrateNum::new) {
518 let cdata = self.get_crate_data(cnum);
520 match cdata.extern_crate.get() {
521 // Ignore crates without a corresponding local `extern crate` item.
522 Some(extern_crate) if !extern_crate.direct => continue,
526 let mut bfs_queue = &mut VecDeque::new();
527 let mut add_child = |bfs_queue: &mut VecDeque<_>, child: def::Export, parent: DefId| {
528 let child = child.def.def_id();
530 if self.visibility(child) != ty::Visibility::Public {
534 match visible_parent_map.entry(child) {
535 Entry::Occupied(mut entry) => {
536 // If `child` is defined in crate `cnum`, ensure
537 // that it is mapped to a parent in `cnum`.
538 if child.krate == cnum && entry.get().krate != cnum {
539 entry.insert(parent);
542 Entry::Vacant(entry) => {
543 entry.insert(parent);
544 bfs_queue.push_back(child);
549 bfs_queue.push_back(DefId {
551 index: CRATE_DEF_INDEX
553 while let Some(def) = bfs_queue.pop_front() {
554 for child in self.item_children(def) {
555 add_child(bfs_queue, child, def);
560 drop(visible_parent_map);
561 self.visible_parent_map.borrow()