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, ExternCrate};
18 use rustc::middle::cstore::{NativeLibrary, LinkMeta, LinkagePreference, LoadedMacro};
19 use rustc::hir::def::{self, Def};
20 use rustc::middle::lang_items;
21 use rustc::session::Session;
22 use rustc::ty::{self, TyCtxt};
23 use rustc::ty::maps::Providers;
24 use rustc::hir::def_id::{CrateNum, DefId, DefIndex, CRATE_DEF_INDEX, LOCAL_CRATE};
26 use rustc::dep_graph::DepNode;
27 use rustc::hir::map::{DefKey, DefPath, DisambiguatedDefPathData};
28 use rustc::util::nodemap::{NodeSet, DefIdMap};
29 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 ty => { cdata.get_type(def_id.index, tcx) }
72 generics => { tcx.alloc_generics(cdata.get_generics(def_id.index)) }
73 predicates => { cdata.get_predicates(def_id.index, tcx) }
74 super_predicates => { cdata.get_super_predicates(def_id.index, tcx) }
76 tcx.alloc_trait_def(cdata.get_trait_def(def_id.index, tcx))
78 adt_def => { cdata.get_adt_def(def_id.index, tcx) }
81 tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
83 variances => { 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 coerce_unsized_info => {
92 cdata.get_coerce_unsized_info(def_id.index).unwrap_or_else(|| {
93 bug!("coerce_unsized_info: `{:?}` is missing its info", def_id);
97 let mir = cdata.maybe_get_item_mir(tcx, def_id.index).unwrap_or_else(|| {
98 bug!("get_item_mir: missing MIR for `{:?}`", def_id)
101 let mir = tcx.alloc_mir(mir);
103 // Perma-borrow MIR from extern crates to prevent mutation.
104 mem::forget(mir.borrow());
108 mir_const_qualif => { cdata.mir_const_qualif(def_id.index) }
109 typeck_tables => { cdata.item_body_tables(def_id.index, tcx) }
110 closure_kind => { cdata.closure_kind(def_id.index) }
111 closure_type => { cdata.closure_ty(def_id.index, tcx) }
112 inherent_impls => { Rc::new(cdata.get_inherent_implementations_for_type(def_id.index)) }
115 impl CrateStore for cstore::CStore {
116 fn crate_data_as_rc_any(&self, krate: CrateNum) -> Rc<Any> {
117 self.get_crate_data(krate)
120 fn describe_def(&self, def: DefId) -> Option<Def> {
121 self.dep_graph.read(DepNode::MetaData(def));
122 self.get_crate_data(def.krate).get_def(def.index)
125 fn def_span(&self, sess: &Session, def: DefId) -> Span {
126 self.dep_graph.read(DepNode::MetaData(def));
127 self.get_crate_data(def.krate).get_span(def.index, sess)
130 fn stability(&self, def: DefId) -> Option<attr::Stability> {
131 self.dep_graph.read(DepNode::MetaData(def));
132 self.get_crate_data(def.krate).get_stability(def.index)
135 fn deprecation(&self, def: DefId) -> Option<attr::Deprecation> {
136 self.dep_graph.read(DepNode::MetaData(def));
137 self.get_crate_data(def.krate).get_deprecation(def.index)
140 fn visibility(&self, def: DefId) -> ty::Visibility {
141 self.dep_graph.read(DepNode::MetaData(def));
142 self.get_crate_data(def.krate).get_visibility(def.index)
145 fn item_generics_cloned(&self, def: DefId) -> ty::Generics {
146 self.dep_graph.read(DepNode::MetaData(def));
147 self.get_crate_data(def.krate).get_generics(def.index)
150 fn item_attrs(&self, def_id: DefId) -> Vec<ast::Attribute>
152 self.dep_graph.read(DepNode::MetaData(def_id));
153 self.get_crate_data(def_id.krate).get_item_attrs(def_id.index)
156 fn fn_arg_names(&self, did: DefId) -> Vec<ast::Name>
158 // FIXME(#38501) We've skipped a `read` on the `HirBody` of
159 // a `fn` when encoding, so the dep-tracking wouldn't work.
160 // This is only used by rustdoc anyway, which shouldn't have
161 // incremental recompilation ever enabled.
162 assert!(!self.dep_graph.is_fully_enabled());
163 self.get_crate_data(did.krate).get_fn_arg_names(did.index)
166 fn implementations_of_trait(&self, filter: Option<DefId>) -> Vec<DefId>
168 if let Some(def_id) = filter {
169 self.dep_graph.read(DepNode::MetaData(def_id));
171 let mut result = vec![];
172 self.iter_crate_data(|_, cdata| {
173 cdata.get_implementations_for_trait(filter, &mut result)
178 fn impl_polarity(&self, def: DefId) -> hir::ImplPolarity
180 self.dep_graph.read(DepNode::MetaData(def));
181 self.get_crate_data(def.krate).get_impl_polarity(def.index)
184 fn impl_parent(&self, impl_def: DefId) -> Option<DefId> {
185 self.dep_graph.read(DepNode::MetaData(impl_def));
186 self.get_crate_data(impl_def.krate).get_parent_impl(impl_def.index)
189 fn trait_of_item(&self, def_id: DefId) -> Option<DefId> {
190 self.dep_graph.read(DepNode::MetaData(def_id));
191 self.get_crate_data(def_id.krate).get_trait_of_item(def_id.index)
194 fn associated_item_cloned(&self, def: DefId) -> ty::AssociatedItem
196 self.dep_graph.read(DepNode::MetaData(def));
197 self.get_crate_data(def.krate).get_associated_item(def.index)
200 fn is_const_fn(&self, did: DefId) -> bool
202 self.dep_graph.read(DepNode::MetaData(did));
203 self.get_crate_data(did.krate).is_const_fn(did.index)
206 fn is_default_impl(&self, impl_did: DefId) -> bool {
207 self.dep_graph.read(DepNode::MetaData(impl_did));
208 self.get_crate_data(impl_did.krate).is_default_impl(impl_did.index)
211 fn is_foreign_item(&self, did: DefId) -> bool {
212 self.get_crate_data(did.krate).is_foreign_item(did.index)
215 fn is_statically_included_foreign_item(&self, def_id: DefId) -> bool
217 self.do_is_statically_included_foreign_item(def_id)
220 fn is_exported_symbol(&self, def_id: DefId) -> bool {
221 self.get_crate_data(def_id.krate).exported_symbols.contains(&def_id.index)
224 fn is_dllimport_foreign_item(&self, def_id: DefId) -> bool {
225 if def_id.krate == LOCAL_CRATE {
226 self.dllimport_foreign_items.borrow().contains(&def_id.index)
228 self.get_crate_data(def_id.krate).is_dllimport_foreign_item(def_id.index)
232 fn dylib_dependency_formats(&self, cnum: CrateNum)
233 -> Vec<(CrateNum, LinkagePreference)>
235 self.get_crate_data(cnum).get_dylib_dependency_formats()
238 fn dep_kind(&self, cnum: CrateNum) -> DepKind
240 self.get_crate_data(cnum).dep_kind.get()
243 fn export_macros(&self, cnum: CrateNum) {
244 if self.get_crate_data(cnum).dep_kind.get() == DepKind::UnexportedMacrosOnly {
245 self.get_crate_data(cnum).dep_kind.set(DepKind::MacrosOnly)
249 fn lang_items(&self, cnum: CrateNum) -> Vec<(DefIndex, usize)>
251 self.get_crate_data(cnum).get_lang_items()
254 fn missing_lang_items(&self, cnum: CrateNum)
255 -> Vec<lang_items::LangItem>
257 self.get_crate_data(cnum).get_missing_lang_items()
260 fn is_staged_api(&self, cnum: CrateNum) -> bool
262 self.get_crate_data(cnum).is_staged_api()
265 fn is_allocator(&self, cnum: CrateNum) -> bool
267 self.get_crate_data(cnum).is_allocator()
270 fn is_panic_runtime(&self, cnum: CrateNum) -> bool
272 self.get_crate_data(cnum).is_panic_runtime()
275 fn is_compiler_builtins(&self, cnum: CrateNum) -> bool {
276 self.get_crate_data(cnum).is_compiler_builtins()
279 fn is_sanitizer_runtime(&self, cnum: CrateNum) -> bool {
280 self.get_crate_data(cnum).is_sanitizer_runtime()
283 fn panic_strategy(&self, cnum: CrateNum) -> PanicStrategy {
284 self.get_crate_data(cnum).panic_strategy()
287 fn crate_name(&self, cnum: CrateNum) -> Symbol
289 self.get_crate_data(cnum).name
292 fn original_crate_name(&self, cnum: CrateNum) -> Symbol
294 self.get_crate_data(cnum).name()
297 fn extern_crate(&self, cnum: CrateNum) -> Option<ExternCrate>
299 self.get_crate_data(cnum).extern_crate.get()
302 fn crate_hash(&self, cnum: CrateNum) -> Svh
304 self.get_crate_hash(cnum)
307 fn crate_disambiguator(&self, cnum: CrateNum) -> Symbol
309 self.get_crate_data(cnum).disambiguator()
312 fn plugin_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>
314 self.get_crate_data(cnum).root.plugin_registrar_fn.map(|index| DefId {
320 fn derive_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>
322 self.get_crate_data(cnum).root.macro_derive_registrar.map(|index| DefId {
328 fn native_libraries(&self, cnum: CrateNum) -> Vec<NativeLibrary>
330 self.get_crate_data(cnum).get_native_libraries()
333 fn exported_symbols(&self, cnum: CrateNum) -> Vec<DefId>
335 self.get_crate_data(cnum).get_exported_symbols()
338 fn is_no_builtins(&self, cnum: CrateNum) -> bool {
339 self.get_crate_data(cnum).is_no_builtins()
342 fn retrace_path(&self,
344 path: &[DisambiguatedDefPathData])
346 let cdata = self.get_crate_data(cnum);
349 .map(|index| DefId { krate: cnum, index: index })
352 /// Returns the `DefKey` for a given `DefId`. This indicates the
353 /// parent `DefId` as well as some idea of what kind of data the
354 /// `DefId` refers to.
355 fn def_key(&self, def: DefId) -> DefKey {
356 // Note: loading the def-key (or def-path) for a def-id is not
357 // a *read* of its metadata. This is because the def-id is
358 // really just an interned shorthand for a def-path, which is the
359 // canonical name for an item.
361 // self.dep_graph.read(DepNode::MetaData(def));
362 self.get_crate_data(def.krate).def_key(def.index)
365 fn def_path(&self, def: DefId) -> DefPath {
366 // See `Note` above in `def_key()` for why this read is
369 // self.dep_graph.read(DepNode::MetaData(def));
370 self.get_crate_data(def.krate).def_path(def.index)
373 fn struct_field_names(&self, def: DefId) -> Vec<ast::Name>
375 self.dep_graph.read(DepNode::MetaData(def));
376 self.get_crate_data(def.krate).get_struct_field_names(def.index)
379 fn item_children(&self, def_id: DefId) -> Vec<def::Export>
381 self.dep_graph.read(DepNode::MetaData(def_id));
382 let mut result = vec![];
383 self.get_crate_data(def_id.krate)
384 .each_child_of_item(def_id.index, |child| result.push(child));
388 fn load_macro(&self, id: DefId, sess: &Session) -> LoadedMacro {
389 let data = self.get_crate_data(id.krate);
390 if let Some(ref proc_macros) = data.proc_macros {
391 return LoadedMacro::ProcMacro(proc_macros[id.index.as_usize() - 1].1.clone());
394 let (name, def) = data.get_macro(id.index);
395 let source_name = format!("<{} macros>", name);
397 let filemap = sess.parse_sess.codemap().new_filemap(source_name, None, def.body);
398 let local_span = Span { lo: filemap.start_pos, hi: filemap.end_pos, ctxt: NO_EXPANSION };
399 let body = filemap_to_stream(&sess.parse_sess, filemap);
401 // Mark the attrs as used
402 let attrs = data.get_item_attrs(id.index);
404 attr::mark_used(attr);
407 let name = data.def_key(id.index).disambiguated_data.data
408 .get_opt_name().expect("no name in load_macro");
409 sess.imported_macro_spans.borrow_mut()
410 .insert(local_span, (name.to_string(), data.get_span(id.index, sess)));
412 LoadedMacro::MacroDef(ast::Item {
413 ident: ast::Ident::with_empty_ctxt(name),
414 id: ast::DUMMY_NODE_ID,
417 node: ast::ItemKind::MacroDef(body.into()),
418 vis: ast::Visibility::Inherited,
422 fn maybe_get_item_body<'a, 'tcx>(&self,
423 tcx: TyCtxt<'a, 'tcx, 'tcx>,
425 -> Option<&'tcx hir::Body>
427 if let Some(cached) = tcx.hir.get_inlined_body(def_id) {
431 self.dep_graph.read(DepNode::MetaData(def_id));
432 debug!("maybe_get_item_body({}): inlining item", tcx.item_path_str(def_id));
434 self.get_crate_data(def_id.krate).maybe_get_item_body(tcx, def_id.index)
437 fn item_body_nested_bodies(&self, def: DefId) -> BTreeMap<hir::BodyId, hir::Body> {
438 self.dep_graph.read(DepNode::MetaData(def));
439 self.get_crate_data(def.krate).item_body_nested_bodies(def.index)
442 fn const_is_rvalue_promotable_to_static(&self, def: DefId) -> bool {
443 self.dep_graph.read(DepNode::MetaData(def));
444 self.get_crate_data(def.krate).const_is_rvalue_promotable_to_static(def.index)
447 fn is_item_mir_available(&self, def: DefId) -> bool {
448 self.dep_graph.read(DepNode::MetaData(def));
449 self.get_crate_data(def.krate).is_item_mir_available(def.index)
452 fn crates(&self) -> Vec<CrateNum>
454 let mut result = vec![];
455 self.iter_crate_data(|cnum, _| result.push(cnum));
459 fn used_libraries(&self) -> Vec<NativeLibrary>
461 self.get_used_libraries().borrow().clone()
464 fn used_link_args(&self) -> Vec<String>
466 self.get_used_link_args().borrow().clone()
469 fn metadata_filename(&self) -> &str
471 locator::METADATA_FILENAME
474 fn metadata_section_name(&self, target: &Target) -> &str
476 locator::meta_section_name(target)
479 fn used_crates(&self, prefer: LinkagePreference) -> Vec<(CrateNum, LibSource)>
481 self.do_get_used_crates(prefer)
484 fn used_crate_source(&self, cnum: CrateNum) -> CrateSource
486 self.get_crate_data(cnum).source.clone()
489 fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<CrateNum>
491 self.do_extern_mod_stmt_cnum(emod_id)
494 fn encode_metadata<'a, 'tcx>(&self,
495 tcx: TyCtxt<'a, 'tcx, 'tcx>,
496 link_meta: &LinkMeta,
497 reachable: &NodeSet) -> Vec<u8>
499 encoder::encode_metadata(tcx, self, link_meta, reachable)
502 fn metadata_encoding_version(&self) -> &[u8]
504 schema::METADATA_HEADER
507 /// Returns a map from a sufficiently visible external item (i.e. an external item that is
508 /// visible from at least one local module) to a sufficiently visible parent (considering
509 /// modules that re-export the external item to be parents).
510 fn visible_parent_map<'a>(&'a self) -> ::std::cell::RefMut<'a, DefIdMap<DefId>> {
511 let mut visible_parent_map = self.visible_parent_map.borrow_mut();
512 if !visible_parent_map.is_empty() { return visible_parent_map; }
514 use std::collections::vec_deque::VecDeque;
515 use std::collections::hash_map::Entry;
516 for cnum in (1 .. self.next_crate_num().as_usize()).map(CrateNum::new) {
517 let cdata = self.get_crate_data(cnum);
519 match cdata.extern_crate.get() {
520 // Ignore crates without a corresponding local `extern crate` item.
521 Some(extern_crate) if !extern_crate.direct => continue,
525 let mut bfs_queue = &mut VecDeque::new();
526 let mut add_child = |bfs_queue: &mut VecDeque<_>, child: def::Export, parent: DefId| {
527 let child = child.def.def_id();
529 if self.visibility(child) != ty::Visibility::Public {
533 match visible_parent_map.entry(child) {
534 Entry::Occupied(mut entry) => {
535 // If `child` is defined in crate `cnum`, ensure
536 // that it is mapped to a parent in `cnum`.
537 if child.krate == cnum && entry.get().krate != cnum {
538 entry.insert(parent);
541 Entry::Vacant(entry) => {
542 entry.insert(parent);
543 bfs_queue.push_back(child);
548 bfs_queue.push_back(DefId {
550 index: CRATE_DEF_INDEX
552 while let Some(def) = bfs_queue.pop_front() {
553 for child in self.item_children(def) {
554 add_child(bfs_queue, child, def);