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};
20 use rustc::hir::def::{self, Def};
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;
28 use rustc::hir::map::{DefKey, DefPath, DisambiguatedDefPathData};
29 use rustc::util::nodemap::{NodeSet, DefIdMap};
30 use rustc_back::PanicStrategy;
38 use syntax::parse::filemap_to_stream;
39 use syntax::symbol::Symbol;
40 use syntax_pos::{Span, NO_EXPANSION};
41 use rustc::hir::svh::Svh;
42 use rustc_back::target::Target;
45 use std::collections::BTreeMap;
47 macro_rules! provide {
48 (<$lt:tt> $tcx:ident, $def_id:ident, $cdata:ident $($name:ident => $compute:block)*) => {
49 pub fn provide<$lt>(providers: &mut Providers<$lt>) {
50 $(fn $name<'a, $lt:$lt>($tcx: TyCtxt<'a, $lt, $lt>, $def_id: DefId)
51 -> <ty::queries::$name<$lt> as
52 DepTrackingMapConfig>::Value {
53 assert!(!$def_id.is_local());
55 $tcx.dep_graph.read(DepNode::MetaData($def_id));
57 let $cdata = $tcx.sess.cstore.crate_data_as_rc_any($def_id.krate);
58 let $cdata = $cdata.downcast_ref::<cstore::CrateMetadata>()
59 .expect("CrateStore crated ata is not a CrateMetadata");
63 *providers = Providers {
71 provide! { <'tcx> tcx, def_id, cdata
72 ty => { cdata.get_type(def_id.index, tcx) }
73 generics => { tcx.alloc_generics(cdata.get_generics(def_id.index)) }
74 predicates => { cdata.get_predicates(def_id.index, tcx) }
75 super_predicates => { cdata.get_super_predicates(def_id.index, tcx) }
77 tcx.alloc_trait_def(cdata.get_trait_def(def_id.index))
79 adt_def => { cdata.get_adt_def(def_id.index, tcx) }
82 tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
84 variances => { Rc::new(cdata.get_item_variances(def_id.index)) }
85 associated_item_def_ids => {
86 let mut result = vec![];
87 cdata.each_child_of_item(def_id.index, |child| result.push(child.def.def_id()));
90 associated_item => { cdata.get_associated_item(def_id.index) }
91 impl_trait_ref => { cdata.get_impl_trait(def_id.index, tcx) }
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_item_mir(tcx, def_id.index).unwrap_or_else(|| {
99 bug!("get_item_mir: missing MIR for `{:?}`", def_id)
102 let mir = tcx.alloc_mir(mir);
104 // Perma-borrow MIR from extern crates to prevent mutation.
105 mem::forget(mir.borrow());
109 mir_const_qualif => { cdata.mir_const_qualif(def_id.index) }
110 typeck_tables => { cdata.item_body_tables(def_id.index, tcx) }
111 closure_kind => { cdata.closure_kind(def_id.index) }
112 closure_type => { cdata.closure_ty(def_id.index, tcx) }
113 inherent_impls => { Rc::new(cdata.get_inherent_implementations_for_type(def_id.index)) }
116 impl CrateStore for cstore::CStore {
117 fn crate_data_as_rc_any(&self, krate: CrateNum) -> Rc<Any> {
118 self.get_crate_data(krate)
121 fn describe_def(&self, def: DefId) -> Option<Def> {
122 self.dep_graph.read(DepNode::MetaData(def));
123 self.get_crate_data(def.krate).get_def(def.index)
126 fn def_span(&self, sess: &Session, def: DefId) -> Span {
127 self.dep_graph.read(DepNode::MetaData(def));
128 self.get_crate_data(def.krate).get_span(def.index, sess)
131 fn stability(&self, def: DefId) -> Option<attr::Stability> {
132 self.dep_graph.read(DepNode::MetaData(def));
133 self.get_crate_data(def.krate).get_stability(def.index)
136 fn deprecation(&self, def: DefId) -> Option<attr::Deprecation> {
137 self.dep_graph.read(DepNode::MetaData(def));
138 self.get_crate_data(def.krate).get_deprecation(def.index)
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 item_attrs(&self, def_id: DefId) -> Vec<ast::Attribute>
153 self.dep_graph.read(DepNode::MetaData(def_id));
154 self.get_crate_data(def_id.krate).get_item_attrs(def_id.index)
157 fn fn_arg_names(&self, did: DefId) -> Vec<ast::Name>
159 // FIXME(#38501) We've skipped a `read` on the `HirBody` of
160 // a `fn` when encoding, so the dep-tracking wouldn't work.
161 // This is only used by rustdoc anyway, which shouldn't have
162 // incremental recompilation ever enabled.
163 assert!(!self.dep_graph.is_fully_enabled());
164 self.get_crate_data(did.krate).get_fn_arg_names(did.index)
167 fn implementations_of_trait(&self, filter: Option<DefId>) -> Vec<DefId>
169 if let Some(def_id) = filter {
170 self.dep_graph.read(DepNode::MetaData(def_id));
172 let mut result = vec![];
173 self.iter_crate_data(|_, cdata| {
174 cdata.get_implementations_for_trait(filter, &mut result)
179 fn impl_polarity(&self, def: DefId) -> hir::ImplPolarity
181 self.dep_graph.read(DepNode::MetaData(def));
182 self.get_crate_data(def.krate).get_impl_polarity(def.index)
185 fn impl_parent(&self, impl_def: DefId) -> Option<DefId> {
186 self.dep_graph.read(DepNode::MetaData(impl_def));
187 self.get_crate_data(impl_def.krate).get_parent_impl(impl_def.index)
190 fn trait_of_item(&self, def_id: DefId) -> Option<DefId> {
191 self.dep_graph.read(DepNode::MetaData(def_id));
192 self.get_crate_data(def_id.krate).get_trait_of_item(def_id.index)
195 fn associated_item_cloned(&self, def: DefId) -> ty::AssociatedItem
197 self.dep_graph.read(DepNode::MetaData(def));
198 self.get_crate_data(def.krate).get_associated_item(def.index)
201 fn is_const_fn(&self, did: DefId) -> bool
203 self.dep_graph.read(DepNode::MetaData(did));
204 self.get_crate_data(did.krate).is_const_fn(did.index)
207 fn is_default_impl(&self, impl_did: DefId) -> bool {
208 self.dep_graph.read(DepNode::MetaData(impl_did));
209 self.get_crate_data(impl_did.krate).is_default_impl(impl_did.index)
212 fn is_foreign_item(&self, did: DefId) -> bool {
213 self.get_crate_data(did.krate).is_foreign_item(did.index)
216 fn is_statically_included_foreign_item(&self, def_id: DefId) -> bool
218 self.do_is_statically_included_foreign_item(def_id)
221 fn is_exported_symbol(&self, def_id: DefId) -> bool {
222 self.get_crate_data(def_id.krate).exported_symbols.contains(&def_id.index)
225 fn is_dllimport_foreign_item(&self, def_id: DefId) -> bool {
226 if def_id.krate == LOCAL_CRATE {
227 self.dllimport_foreign_items.borrow().contains(&def_id.index)
229 self.get_crate_data(def_id.krate).is_dllimport_foreign_item(def_id.index)
233 fn dylib_dependency_formats(&self, cnum: CrateNum)
234 -> Vec<(CrateNum, LinkagePreference)>
236 self.get_crate_data(cnum).get_dylib_dependency_formats()
239 fn dep_kind(&self, cnum: CrateNum) -> DepKind
241 self.get_crate_data(cnum).dep_kind.get()
244 fn export_macros(&self, cnum: CrateNum) {
245 if self.get_crate_data(cnum).dep_kind.get() == DepKind::UnexportedMacrosOnly {
246 self.get_crate_data(cnum).dep_kind.set(DepKind::MacrosOnly)
250 fn lang_items(&self, cnum: CrateNum) -> Vec<(DefIndex, usize)>
252 self.get_crate_data(cnum).get_lang_items()
255 fn missing_lang_items(&self, cnum: CrateNum)
256 -> Vec<lang_items::LangItem>
258 self.get_crate_data(cnum).get_missing_lang_items()
261 fn is_staged_api(&self, cnum: CrateNum) -> bool
263 self.get_crate_data(cnum).is_staged_api()
266 fn is_allocator(&self, cnum: CrateNum) -> bool
268 self.get_crate_data(cnum).is_allocator()
271 fn is_panic_runtime(&self, cnum: CrateNum) -> bool
273 self.get_crate_data(cnum).is_panic_runtime()
276 fn is_compiler_builtins(&self, cnum: CrateNum) -> bool {
277 self.get_crate_data(cnum).is_compiler_builtins()
280 fn is_sanitizer_runtime(&self, cnum: CrateNum) -> bool {
281 self.get_crate_data(cnum).is_sanitizer_runtime()
284 fn panic_strategy(&self, cnum: CrateNum) -> PanicStrategy {
285 self.get_crate_data(cnum).panic_strategy()
288 fn crate_name(&self, cnum: CrateNum) -> Symbol
290 self.get_crate_data(cnum).name
293 fn original_crate_name(&self, cnum: CrateNum) -> Symbol
295 self.get_crate_data(cnum).name()
298 fn extern_crate(&self, cnum: CrateNum) -> Option<ExternCrate>
300 self.get_crate_data(cnum).extern_crate.get()
303 fn crate_hash(&self, cnum: CrateNum) -> Svh
305 self.get_crate_hash(cnum)
308 fn crate_disambiguator(&self, cnum: CrateNum) -> Symbol
310 self.get_crate_data(cnum).disambiguator()
313 fn plugin_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>
315 self.get_crate_data(cnum).root.plugin_registrar_fn.map(|index| DefId {
321 fn derive_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>
323 self.get_crate_data(cnum).root.macro_derive_registrar.map(|index| DefId {
329 fn native_libraries(&self, cnum: CrateNum) -> Vec<NativeLibrary>
331 self.get_crate_data(cnum).get_native_libraries()
334 fn exported_symbols(&self, cnum: CrateNum) -> Vec<DefId>
336 self.get_crate_data(cnum).get_exported_symbols()
339 fn is_no_builtins(&self, cnum: CrateNum) -> bool {
340 self.get_crate_data(cnum).is_no_builtins()
343 fn retrace_path(&self,
345 path: &[DisambiguatedDefPathData])
347 let cdata = self.get_crate_data(cnum);
350 .map(|index| DefId { krate: cnum, index: index })
353 /// Returns the `DefKey` for a given `DefId`. This indicates the
354 /// parent `DefId` as well as some idea of what kind of data the
355 /// `DefId` refers to.
356 fn def_key(&self, def: DefId) -> DefKey {
357 // Note: loading the def-key (or def-path) for a def-id is not
358 // a *read* of its metadata. This is because the def-id is
359 // really just an interned shorthand for a def-path, which is the
360 // canonical name for an item.
362 // self.dep_graph.read(DepNode::MetaData(def));
363 self.get_crate_data(def.krate).def_key(def.index)
366 fn def_path(&self, def: DefId) -> DefPath {
367 // See `Note` above in `def_key()` for why this read is
370 // self.dep_graph.read(DepNode::MetaData(def));
371 self.get_crate_data(def.krate).def_path(def.index)
374 fn def_path_hash(&self, def: DefId) -> u64 {
375 self.get_crate_data(def.krate).def_path_hash(def.index)
378 fn struct_field_names(&self, def: DefId) -> Vec<ast::Name>
380 self.dep_graph.read(DepNode::MetaData(def));
381 self.get_crate_data(def.krate).get_struct_field_names(def.index)
384 fn item_children(&self, def_id: DefId) -> Vec<def::Export>
386 self.dep_graph.read(DepNode::MetaData(def_id));
387 let mut result = vec![];
388 self.get_crate_data(def_id.krate)
389 .each_child_of_item(def_id.index, |child| result.push(child));
393 fn load_macro(&self, id: DefId, sess: &Session) -> LoadedMacro {
394 let data = self.get_crate_data(id.krate);
395 if let Some(ref proc_macros) = data.proc_macros {
396 return LoadedMacro::ProcMacro(proc_macros[id.index.as_usize() - 1].1.clone());
399 let (name, def) = data.get_macro(id.index);
400 let source_name = format!("<{} macros>", name);
402 let filemap = sess.parse_sess.codemap().new_filemap(source_name, None, def.body);
403 let local_span = Span { lo: filemap.start_pos, hi: filemap.end_pos, ctxt: NO_EXPANSION };
404 let body = filemap_to_stream(&sess.parse_sess, filemap);
406 // Mark the attrs as used
407 let attrs = data.get_item_attrs(id.index);
409 attr::mark_used(attr);
412 let name = data.def_key(id.index).disambiguated_data.data
413 .get_opt_name().expect("no name in load_macro");
414 sess.imported_macro_spans.borrow_mut()
415 .insert(local_span, (name.to_string(), data.get_span(id.index, sess)));
417 LoadedMacro::MacroDef(ast::Item {
418 ident: ast::Ident::with_empty_ctxt(name),
419 id: ast::DUMMY_NODE_ID,
422 node: ast::ItemKind::MacroDef(body.into()),
423 vis: ast::Visibility::Inherited,
427 fn maybe_get_item_body<'a, 'tcx>(&self,
428 tcx: TyCtxt<'a, 'tcx, 'tcx>,
430 -> Option<&'tcx hir::Body>
432 if let Some(cached) = tcx.hir.get_inlined_body(def_id) {
436 self.dep_graph.read(DepNode::MetaData(def_id));
437 debug!("maybe_get_item_body({}): inlining item", tcx.item_path_str(def_id));
439 self.get_crate_data(def_id.krate).maybe_get_item_body(tcx, def_id.index)
442 fn item_body_nested_bodies(&self, def: DefId) -> BTreeMap<hir::BodyId, hir::Body> {
443 self.dep_graph.read(DepNode::MetaData(def));
444 self.get_crate_data(def.krate).item_body_nested_bodies(def.index)
447 fn const_is_rvalue_promotable_to_static(&self, def: DefId) -> bool {
448 self.dep_graph.read(DepNode::MetaData(def));
449 self.get_crate_data(def.krate).const_is_rvalue_promotable_to_static(def.index)
452 fn is_item_mir_available(&self, def: DefId) -> bool {
453 self.dep_graph.read(DepNode::MetaData(def));
454 self.get_crate_data(def.krate).is_item_mir_available(def.index)
457 fn crates(&self) -> Vec<CrateNum>
459 let mut result = vec![];
460 self.iter_crate_data(|cnum, _| result.push(cnum));
464 fn used_libraries(&self) -> Vec<NativeLibrary>
466 self.get_used_libraries().borrow().clone()
469 fn used_link_args(&self) -> Vec<String>
471 self.get_used_link_args().borrow().clone()
474 fn metadata_filename(&self) -> &str
476 locator::METADATA_FILENAME
479 fn metadata_section_name(&self, target: &Target) -> &str
481 locator::meta_section_name(target)
484 fn used_crates(&self, prefer: LinkagePreference) -> Vec<(CrateNum, LibSource)>
486 self.do_get_used_crates(prefer)
489 fn used_crate_source(&self, cnum: CrateNum) -> CrateSource
491 self.get_crate_data(cnum).source.clone()
494 fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<CrateNum>
496 self.do_extern_mod_stmt_cnum(emod_id)
499 fn encode_metadata<'a, 'tcx>(&self,
500 tcx: TyCtxt<'a, 'tcx, 'tcx>,
501 link_meta: &LinkMeta,
505 encoder::encode_metadata(tcx, self, link_meta, reachable)
508 fn metadata_encoding_version(&self) -> &[u8]
510 schema::METADATA_HEADER
513 /// Returns a map from a sufficiently visible external item (i.e. an external item that is
514 /// visible from at least one local module) to a sufficiently visible parent (considering
515 /// modules that re-export the external item to be parents).
516 fn visible_parent_map<'a>(&'a self) -> ::std::cell::Ref<'a, DefIdMap<DefId>> {
518 let visible_parent_map = self.visible_parent_map.borrow();
519 if !visible_parent_map.is_empty() {
520 return visible_parent_map;
524 use std::collections::vec_deque::VecDeque;
525 use std::collections::hash_map::Entry;
527 let mut visible_parent_map = self.visible_parent_map.borrow_mut();
529 for cnum in (1 .. self.next_crate_num().as_usize()).map(CrateNum::new) {
530 let cdata = self.get_crate_data(cnum);
532 match cdata.extern_crate.get() {
533 // Ignore crates without a corresponding local `extern crate` item.
534 Some(extern_crate) if !extern_crate.direct => continue,
538 let mut bfs_queue = &mut VecDeque::new();
539 let mut add_child = |bfs_queue: &mut VecDeque<_>, child: def::Export, parent: DefId| {
540 let child = child.def.def_id();
542 if self.visibility(child) != ty::Visibility::Public {
546 match visible_parent_map.entry(child) {
547 Entry::Occupied(mut entry) => {
548 // If `child` is defined in crate `cnum`, ensure
549 // that it is mapped to a parent in `cnum`.
550 if child.krate == cnum && entry.get().krate != cnum {
551 entry.insert(parent);
554 Entry::Vacant(entry) => {
555 entry.insert(parent);
556 bfs_queue.push_back(child);
561 bfs_queue.push_back(DefId {
563 index: CRATE_DEF_INDEX
565 while let Some(def) = bfs_queue.pop_front() {
566 for child in self.item_children(def) {
567 add_child(bfs_queue, child, def);
572 drop(visible_parent_map);
573 self.visible_parent_map.borrow()