| use crate::cstore::{self, LoadedMacro}; |
| use crate::encoder; |
| use crate::link_args; |
| use crate::native_libs; |
| use crate::foreign_modules; |
| use crate::schema; |
| |
| use rustc::ty::query::QueryConfig; |
| use rustc::middle::cstore::{CrateStore, DepKind, |
| EncodedMetadata, NativeLibraryKind}; |
| use rustc::middle::exported_symbols::ExportedSymbol; |
| use rustc::middle::stability::DeprecationEntry; |
| use rustc::hir::def; |
| use rustc::hir; |
| use rustc::session::{CrateDisambiguator, Session}; |
| use rustc::ty::{self, TyCtxt}; |
| use rustc::ty::query::Providers; |
| use rustc::hir::def_id::{CrateNum, DefId, LOCAL_CRATE, CRATE_DEF_INDEX}; |
| use rustc::hir::map::{DefKey, DefPath, DefPathHash}; |
| use rustc::hir::map::definitions::DefPathTable; |
| use rustc::util::nodemap::DefIdMap; |
| use rustc_data_structures::svh::Svh; |
| |
| use smallvec::SmallVec; |
| use std::any::Any; |
| use rustc_data_structures::sync::Lrc; |
| use std::sync::Arc; |
| |
| use syntax::ast; |
| use syntax::attr; |
| use syntax::source_map; |
| use syntax::edition::Edition; |
| use syntax::ext::base::{SyntaxExtension, SyntaxExtensionKind}; |
| use syntax::ext::proc_macro::BangProcMacro; |
| use syntax::parse::source_file_to_stream; |
| use syntax::parse::parser::emit_unclosed_delims; |
| use syntax::symbol::{Symbol, sym}; |
| use syntax_pos::{Span, NO_EXPANSION, FileName}; |
| use rustc_data_structures::bit_set::BitSet; |
| |
| macro_rules! provide { |
| (<$lt:tt> $tcx:ident, $def_id:ident, $other:ident, $cdata:ident, |
| $($name:ident => $compute:block)*) => { |
| pub fn provide_extern<$lt>(providers: &mut Providers<$lt>) { |
| // HACK(eddyb) `$lt: $lt` forces `$lt` to be early-bound, which |
| // allows the associated type in the return type to be normalized. |
| $(fn $name<$lt: $lt, T: IntoArgs>( |
| $tcx: TyCtxt<$lt>, |
| def_id_arg: T, |
| ) -> <ty::queries::$name<$lt> as QueryConfig<$lt>>::Value { |
| #[allow(unused_variables)] |
| let ($def_id, $other) = def_id_arg.into_args(); |
| assert!(!$def_id.is_local()); |
| |
| let def_path_hash = $tcx.def_path_hash(DefId { |
| krate: $def_id.krate, |
| index: CRATE_DEF_INDEX |
| }); |
| let dep_node = def_path_hash |
| .to_dep_node(rustc::dep_graph::DepKind::CrateMetadata); |
| // The DepNodeIndex of the DepNode::CrateMetadata should be |
| // cached somewhere, so that we can use read_index(). |
| $tcx.dep_graph.read(dep_node); |
| |
| let $cdata = $tcx.crate_data_as_rc_any($def_id.krate); |
| let $cdata = $cdata.downcast_ref::<cstore::CrateMetadata>() |
| .expect("CrateStore created data is not a CrateMetadata"); |
| $compute |
| })* |
| |
| *providers = Providers { |
| $($name,)* |
| ..*providers |
| }; |
| } |
| } |
| } |
| |
| // small trait to work around different signature queries all being defined via |
| // the macro above. |
| trait IntoArgs { |
| fn into_args(self) -> (DefId, DefId); |
| } |
| |
| impl IntoArgs for DefId { |
| fn into_args(self) -> (DefId, DefId) { (self, self) } |
| } |
| |
| impl IntoArgs for CrateNum { |
| fn into_args(self) -> (DefId, DefId) { (self.as_def_id(), self.as_def_id()) } |
| } |
| |
| impl IntoArgs for (CrateNum, DefId) { |
| fn into_args(self) -> (DefId, DefId) { (self.0.as_def_id(), self.1) } |
| } |
| |
| provide! { <'tcx> tcx, def_id, other, cdata, |
| type_of => { cdata.get_type(def_id.index, tcx) } |
| generics_of => { |
| tcx.arena.alloc(cdata.get_generics(def_id.index, tcx.sess)) |
| } |
| predicates_of => { tcx.arena.alloc(cdata.get_predicates(def_id.index, tcx)) } |
| predicates_defined_on => { |
| tcx.arena.alloc(cdata.get_predicates_defined_on(def_id.index, tcx)) |
| } |
| super_predicates_of => { tcx.arena.alloc(cdata.get_super_predicates(def_id.index, tcx)) } |
| trait_def => { |
| tcx.arena.alloc(cdata.get_trait_def(def_id.index, tcx.sess)) |
| } |
| adt_def => { cdata.get_adt_def(def_id.index, tcx) } |
| adt_destructor => { |
| let _ = cdata; |
| tcx.calculate_dtor(def_id, &mut |_,_| Ok(())) |
| } |
| variances_of => { tcx.arena.alloc_from_iter(cdata.get_item_variances(def_id.index)) } |
| associated_item_def_ids => { |
| let mut result = SmallVec::<[_; 8]>::new(); |
| cdata.each_child_of_item(def_id.index, |
| |child| result.push(child.res.def_id()), tcx.sess); |
| tcx.arena.alloc_slice(&result) |
| } |
| associated_item => { cdata.get_associated_item(def_id.index) } |
| impl_trait_ref => { cdata.get_impl_trait(def_id.index, tcx) } |
| impl_polarity => { cdata.get_impl_polarity(def_id.index) } |
| coerce_unsized_info => { |
| cdata.get_coerce_unsized_info(def_id.index).unwrap_or_else(|| { |
| bug!("coerce_unsized_info: `{:?}` is missing its info", def_id); |
| }) |
| } |
| optimized_mir => { |
| let mir = cdata.maybe_get_optimized_mir(tcx, def_id.index).unwrap_or_else(|| { |
| bug!("get_optimized_mir: missing MIR for `{:?}`", def_id) |
| }); |
| |
| let mir = tcx.arena.alloc(mir); |
| |
| mir |
| } |
| mir_const_qualif => { |
| (cdata.mir_const_qualif(def_id.index), tcx.arena.alloc(BitSet::new_empty(0))) |
| } |
| fn_sig => { cdata.fn_sig(def_id.index, tcx) } |
| inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) } |
| is_const_fn_raw => { cdata.is_const_fn_raw(def_id.index) } |
| is_foreign_item => { cdata.is_foreign_item(def_id.index) } |
| static_mutability => { cdata.static_mutability(def_id.index) } |
| def_kind => { cdata.def_kind(def_id.index) } |
| def_span => { cdata.get_span(def_id.index, &tcx.sess) } |
| lookup_stability => { |
| cdata.get_stability(def_id.index).map(|s| tcx.intern_stability(s)) |
| } |
| lookup_deprecation_entry => { |
| cdata.get_deprecation(def_id.index).map(DeprecationEntry::external) |
| } |
| item_attrs => { cdata.get_item_attrs(def_id.index, tcx.sess) } |
| // FIXME(#38501) We've skipped a `read` on the `HirBody` of |
| // a `fn` when encoding, so the dep-tracking wouldn't work. |
| // This is only used by rustdoc anyway, which shouldn't have |
| // incremental recompilation ever enabled. |
| fn_arg_names => { cdata.get_fn_arg_names(def_id.index) } |
| rendered_const => { cdata.get_rendered_const(def_id.index) } |
| impl_parent => { cdata.get_parent_impl(def_id.index) } |
| trait_of_item => { cdata.get_trait_of_item(def_id.index) } |
| const_is_rvalue_promotable_to_static => { |
| cdata.const_is_rvalue_promotable_to_static(def_id.index) |
| } |
| is_mir_available => { cdata.is_item_mir_available(def_id.index) } |
| |
| dylib_dependency_formats => { cdata.get_dylib_dependency_formats(tcx) } |
| is_panic_runtime => { cdata.root.panic_runtime } |
| is_compiler_builtins => { cdata.root.compiler_builtins } |
| has_global_allocator => { cdata.root.has_global_allocator } |
| has_panic_handler => { cdata.root.has_panic_handler } |
| is_sanitizer_runtime => { cdata.root.sanitizer_runtime } |
| is_profiler_runtime => { cdata.root.profiler_runtime } |
| panic_strategy => { cdata.root.panic_strategy } |
| extern_crate => { |
| let r = *cdata.extern_crate.lock(); |
| r.map(|c| &*tcx.arena.alloc(c)) |
| } |
| is_no_builtins => { cdata.root.no_builtins } |
| symbol_mangling_version => { cdata.root.symbol_mangling_version } |
| impl_defaultness => { cdata.get_impl_defaultness(def_id.index) } |
| reachable_non_generics => { |
| let reachable_non_generics = tcx |
| .exported_symbols(cdata.cnum) |
| .iter() |
| .filter_map(|&(exported_symbol, export_level)| { |
| if let ExportedSymbol::NonGeneric(def_id) = exported_symbol { |
| return Some((def_id, export_level)) |
| } else { |
| None |
| } |
| }) |
| .collect(); |
| |
| tcx.arena.alloc(reachable_non_generics) |
| } |
| native_libraries => { Lrc::new(cdata.get_native_libraries(tcx.sess)) } |
| foreign_modules => { cdata.get_foreign_modules(tcx) } |
| plugin_registrar_fn => { |
| cdata.root.plugin_registrar_fn.map(|index| { |
| DefId { krate: def_id.krate, index } |
| }) |
| } |
| proc_macro_decls_static => { |
| cdata.root.proc_macro_decls_static.map(|index| { |
| DefId { krate: def_id.krate, index } |
| }) |
| } |
| crate_disambiguator => { cdata.root.disambiguator } |
| crate_hash => { cdata.root.hash } |
| original_crate_name => { cdata.root.name } |
| |
| extra_filename => { cdata.root.extra_filename.clone() } |
| |
| implementations_of_trait => { |
| cdata.get_implementations_for_trait(tcx, Some(other)) |
| } |
| |
| all_trait_implementations => { |
| cdata.get_implementations_for_trait(tcx, None) |
| } |
| |
| visibility => { cdata.get_visibility(def_id.index) } |
| dep_kind => { |
| let r = *cdata.dep_kind.lock(); |
| r |
| } |
| crate_name => { cdata.name } |
| item_children => { |
| let mut result = SmallVec::<[_; 8]>::new(); |
| cdata.each_child_of_item(def_id.index, |child| result.push(child), tcx.sess); |
| tcx.arena.alloc_slice(&result) |
| } |
| defined_lib_features => { cdata.get_lib_features(tcx) } |
| defined_lang_items => { cdata.get_lang_items(tcx) } |
| missing_lang_items => { cdata.get_missing_lang_items(tcx) } |
| |
| missing_extern_crate_item => { |
| let r = match *cdata.extern_crate.borrow() { |
| Some(extern_crate) if !extern_crate.direct => true, |
| _ => false, |
| }; |
| r |
| } |
| |
| used_crate_source => { Lrc::new(cdata.source.clone()) } |
| |
| exported_symbols => { Arc::new(cdata.exported_symbols(tcx)) } |
| } |
| |
| pub fn provide(providers: &mut Providers<'_>) { |
| // FIXME(#44234) - almost all of these queries have no sub-queries and |
| // therefore no actual inputs, they're just reading tables calculated in |
| // resolve! Does this work? Unsure! That's what the issue is about |
| *providers = Providers { |
| is_dllimport_foreign_item: |tcx, id| { |
| tcx.native_library_kind(id) == Some(NativeLibraryKind::NativeUnknown) |
| }, |
| is_statically_included_foreign_item: |tcx, id| { |
| match tcx.native_library_kind(id) { |
| Some(NativeLibraryKind::NativeStatic) | |
| Some(NativeLibraryKind::NativeStaticNobundle) => true, |
| _ => false, |
| } |
| }, |
| native_library_kind: |tcx, id| { |
| tcx.native_libraries(id.krate) |
| .iter() |
| .filter(|lib| native_libs::relevant_lib(&tcx.sess, lib)) |
| .find(|lib| { |
| let fm_id = match lib.foreign_module { |
| Some(id) => id, |
| None => return false, |
| }; |
| tcx.foreign_modules(id.krate) |
| .iter() |
| .find(|m| m.def_id == fm_id) |
| .expect("failed to find foreign module") |
| .foreign_items |
| .contains(&id) |
| }) |
| .map(|l| l.kind) |
| }, |
| native_libraries: |tcx, cnum| { |
| assert_eq!(cnum, LOCAL_CRATE); |
| Lrc::new(native_libs::collect(tcx)) |
| }, |
| foreign_modules: |tcx, cnum| { |
| assert_eq!(cnum, LOCAL_CRATE); |
| &tcx.arena.alloc(foreign_modules::collect(tcx))[..] |
| }, |
| link_args: |tcx, cnum| { |
| assert_eq!(cnum, LOCAL_CRATE); |
| Lrc::new(link_args::collect(tcx)) |
| }, |
| |
| // Returns a map from a sufficiently visible external item (i.e., an |
| // external item that is visible from at least one local module) to a |
| // sufficiently visible parent (considering modules that re-export the |
| // external item to be parents). |
| visible_parent_map: |tcx, cnum| { |
| use std::collections::vec_deque::VecDeque; |
| use std::collections::hash_map::Entry; |
| |
| assert_eq!(cnum, LOCAL_CRATE); |
| let mut visible_parent_map: DefIdMap<DefId> = Default::default(); |
| |
| // Issue 46112: We want the map to prefer the shortest |
| // paths when reporting the path to an item. Therefore we |
| // build up the map via a breadth-first search (BFS), |
| // which naturally yields minimal-length paths. |
| // |
| // Note that it needs to be a BFS over the whole forest of |
| // crates, not just each individual crate; otherwise you |
| // only get paths that are locally minimal with respect to |
| // whatever crate we happened to encounter first in this |
| // traversal, but not globally minimal across all crates. |
| let bfs_queue = &mut VecDeque::new(); |
| |
| // Preferring shortest paths alone does not guarantee a |
| // deterministic result; so sort by crate num to avoid |
| // hashtable iteration non-determinism. This only makes |
| // things as deterministic as crate-nums assignment is, |
| // which is to say, its not deterministic in general. But |
| // we believe that libstd is consistently assigned crate |
| // num 1, so it should be enough to resolve #46112. |
| let mut crates: Vec<CrateNum> = (*tcx.crates()).to_owned(); |
| crates.sort(); |
| |
| for &cnum in crates.iter() { |
| // Ignore crates without a corresponding local `extern crate` item. |
| if tcx.missing_extern_crate_item(cnum) { |
| continue |
| } |
| |
| bfs_queue.push_back(DefId { |
| krate: cnum, |
| index: CRATE_DEF_INDEX |
| }); |
| } |
| |
| // (restrict scope of mutable-borrow of `visible_parent_map`) |
| { |
| let visible_parent_map = &mut visible_parent_map; |
| let mut add_child = |bfs_queue: &mut VecDeque<_>, |
| child: &def::Export<hir::HirId>, |
| parent: DefId| { |
| if child.vis != ty::Visibility::Public { |
| return; |
| } |
| |
| if let Some(child) = child.res.opt_def_id() { |
| match visible_parent_map.entry(child) { |
| Entry::Occupied(mut entry) => { |
| // If `child` is defined in crate `cnum`, ensure |
| // that it is mapped to a parent in `cnum`. |
| if child.krate == cnum && entry.get().krate != cnum { |
| entry.insert(parent); |
| } |
| } |
| Entry::Vacant(entry) => { |
| entry.insert(parent); |
| bfs_queue.push_back(child); |
| } |
| } |
| } |
| }; |
| |
| while let Some(def) = bfs_queue.pop_front() { |
| for child in tcx.item_children(def).iter() { |
| add_child(bfs_queue, child, def); |
| } |
| } |
| } |
| |
| tcx.arena.alloc(visible_parent_map) |
| }, |
| |
| ..*providers |
| }; |
| } |
| |
| impl cstore::CStore { |
| pub fn export_macros_untracked(&self, cnum: CrateNum) { |
| let data = self.get_crate_data(cnum); |
| let mut dep_kind = data.dep_kind.lock(); |
| if *dep_kind == DepKind::UnexportedMacrosOnly { |
| *dep_kind = DepKind::MacrosOnly; |
| } |
| } |
| |
| pub fn dep_kind_untracked(&self, cnum: CrateNum) -> DepKind { |
| let data = self.get_crate_data(cnum); |
| let r = *data.dep_kind.lock(); |
| r |
| } |
| |
| pub fn crate_edition_untracked(&self, cnum: CrateNum) -> Edition { |
| self.get_crate_data(cnum).root.edition |
| } |
| |
| pub fn struct_field_names_untracked(&self, def: DefId) -> Vec<ast::Name> { |
| self.get_crate_data(def.krate).get_struct_field_names(def.index) |
| } |
| |
| pub fn ctor_kind_untracked(&self, def: DefId) -> def::CtorKind { |
| self.get_crate_data(def.krate).get_ctor_kind(def.index) |
| } |
| |
| pub fn item_attrs_untracked(&self, def: DefId, sess: &Session) -> Lrc<[ast::Attribute]> { |
| self.get_crate_data(def.krate).get_item_attrs(def.index, sess) |
| } |
| |
| pub fn item_children_untracked( |
| &self, |
| def_id: DefId, |
| sess: &Session |
| ) -> Vec<def::Export<hir::HirId>> { |
| let mut result = vec![]; |
| self.get_crate_data(def_id.krate) |
| .each_child_of_item(def_id.index, |child| result.push(child), sess); |
| result |
| } |
| |
| pub fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro { |
| let data = self.get_crate_data(id.krate); |
| if let Some(ref proc_macros) = data.proc_macros { |
| return LoadedMacro::ProcMacro(proc_macros[id.index.to_proc_macro_index()].1.clone()); |
| } else if data.name == sym::proc_macro && data.item_name(id.index) == sym::quote { |
| let client = proc_macro::bridge::client::Client::expand1(proc_macro::quote); |
| let kind = SyntaxExtensionKind::Bang(Box::new(BangProcMacro { client })); |
| let ext = SyntaxExtension { |
| allow_internal_unstable: Some([sym::proc_macro_def_site][..].into()), |
| ..SyntaxExtension::default(kind, data.root.edition) |
| }; |
| return LoadedMacro::ProcMacro(Lrc::new(ext)); |
| } |
| |
| let def = data.get_macro(id.index); |
| let macro_full_name = data.def_path(id.index).to_string_friendly(|_| data.imported_name); |
| let source_name = FileName::Macros(macro_full_name); |
| |
| let source_file = sess.parse_sess.source_map().new_source_file(source_name, def.body); |
| let local_span = Span::new(source_file.start_pos, source_file.end_pos, NO_EXPANSION); |
| let (body, mut errors) = source_file_to_stream(&sess.parse_sess, source_file, None); |
| emit_unclosed_delims(&mut errors, &sess.diagnostic()); |
| |
| // Mark the attrs as used |
| let attrs = data.get_item_attrs(id.index, sess); |
| for attr in attrs.iter() { |
| attr::mark_used(attr); |
| } |
| |
| let name = data.def_key(id.index).disambiguated_data.data |
| .get_opt_name().expect("no name in load_macro"); |
| sess.imported_macro_spans.borrow_mut() |
| .insert(local_span, (name.to_string(), data.get_span(id.index, sess))); |
| |
| LoadedMacro::MacroDef(ast::Item { |
| ident: ast::Ident::from_str(&name.as_str()), |
| id: ast::DUMMY_NODE_ID, |
| span: local_span, |
| attrs: attrs.iter().cloned().collect(), |
| node: ast::ItemKind::MacroDef(ast::MacroDef { |
| tokens: body.into(), |
| legacy: def.legacy, |
| }), |
| vis: source_map::respan(local_span.shrink_to_lo(), ast::VisibilityKind::Inherited), |
| tokens: None, |
| }) |
| } |
| |
| pub fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssocItem { |
| self.get_crate_data(def.krate).get_associated_item(def.index) |
| } |
| } |
| |
| impl CrateStore for cstore::CStore { |
| fn crate_data_as_rc_any(&self, krate: CrateNum) -> Lrc<dyn Any> { |
| self.get_crate_data(krate) |
| } |
| |
| fn item_generics_cloned_untracked(&self, def: DefId, sess: &Session) -> ty::Generics { |
| self.get_crate_data(def.krate).get_generics(def.index, sess) |
| } |
| |
| fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol |
| { |
| self.get_crate_data(cnum).name |
| } |
| |
| fn crate_is_private_dep_untracked(&self, cnum: CrateNum) -> bool { |
| self.get_crate_data(cnum).private_dep |
| } |
| |
| fn crate_disambiguator_untracked(&self, cnum: CrateNum) -> CrateDisambiguator |
| { |
| self.get_crate_data(cnum).root.disambiguator |
| } |
| |
| fn crate_hash_untracked(&self, cnum: CrateNum) -> Svh |
| { |
| self.get_crate_data(cnum).root.hash |
| } |
| |
| /// Returns the `DefKey` for a given `DefId`. This indicates the |
| /// parent `DefId` as well as some idea of what kind of data the |
| /// `DefId` refers to. |
| fn def_key(&self, def: DefId) -> DefKey { |
| // Note: loading the def-key (or def-path) for a def-id is not |
| // a *read* of its metadata. This is because the def-id is |
| // really just an interned shorthand for a def-path, which is the |
| // canonical name for an item. |
| // |
| // self.dep_graph.read(DepNode::MetaData(def)); |
| self.get_crate_data(def.krate).def_key(def.index) |
| } |
| |
| fn def_path(&self, def: DefId) -> DefPath { |
| // See `Note` above in `def_key()` for why this read is |
| // commented out: |
| // |
| // self.dep_graph.read(DepNode::MetaData(def)); |
| self.get_crate_data(def.krate).def_path(def.index) |
| } |
| |
| fn def_path_hash(&self, def: DefId) -> DefPathHash { |
| self.get_crate_data(def.krate).def_path_hash(def.index) |
| } |
| |
| fn def_path_table(&self, cnum: CrateNum) -> Lrc<DefPathTable> { |
| self.get_crate_data(cnum).def_path_table.clone() |
| } |
| |
| fn crates_untracked(&self) -> Vec<CrateNum> |
| { |
| let mut result = vec![]; |
| self.iter_crate_data(|cnum, _| result.push(cnum)); |
| result |
| } |
| |
| fn extern_mod_stmt_cnum_untracked(&self, emod_id: ast::NodeId) -> Option<CrateNum> |
| { |
| self.do_extern_mod_stmt_cnum(emod_id) |
| } |
| |
| fn postorder_cnums_untracked(&self) -> Vec<CrateNum> { |
| self.do_postorder_cnums_untracked() |
| } |
| |
| fn encode_metadata(&self, tcx: TyCtxt<'_>) -> EncodedMetadata { |
| encoder::encode_metadata(tcx) |
| } |
| |
| fn metadata_encoding_version(&self) -> &[u8] |
| { |
| schema::METADATA_HEADER |
| } |
| } |