523 lines
18 KiB
Rust
523 lines
18 KiB
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use cstore;
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use encoder;
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use schema;
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use rustc::dep_graph::DepTrackingMapConfig;
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use rustc::middle::cstore::{CrateStore, CrateSource, LibSource, DepKind,
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ExternCrate, NativeLibrary, MetadataLoader, LinkMeta,
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LinkagePreference, LoadedMacro, EncodedMetadata};
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use rustc::hir::def;
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use rustc::middle::lang_items;
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use rustc::session::Session;
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use rustc::ty::{self, TyCtxt};
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use rustc::ty::maps::Providers;
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use rustc::hir::def_id::{CrateNum, DefId, DefIndex, CRATE_DEF_INDEX, LOCAL_CRATE};
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use rustc::dep_graph::{DepNode, GlobalMetaDataKind};
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use rustc::hir::map::{DefKey, DefPath, DisambiguatedDefPathData, DefPathHash};
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use rustc::hir::map::definitions::DefPathTable;
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use rustc::util::nodemap::{NodeSet, DefIdMap};
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use rustc_back::PanicStrategy;
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use std::any::Any;
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use std::rc::Rc;
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use syntax::ast;
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use syntax::attr;
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use syntax::parse::filemap_to_stream;
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use syntax::symbol::Symbol;
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use syntax_pos::{Span, NO_EXPANSION};
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use rustc::hir::svh::Svh;
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use rustc::hir;
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macro_rules! provide {
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(<$lt:tt> $tcx:ident, $def_id:ident, $cdata:ident $($name:ident => $compute:block)*) => {
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pub fn provide<$lt>(providers: &mut Providers<$lt>) {
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$(fn $name<'a, $lt:$lt>($tcx: TyCtxt<'a, $lt, $lt>, $def_id: DefId)
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-> <ty::queries::$name<$lt> as
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DepTrackingMapConfig>::Value {
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assert!(!$def_id.is_local());
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$tcx.dep_graph.read(DepNode::MetaData($def_id));
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let $cdata = $tcx.sess.cstore.crate_data_as_rc_any($def_id.krate);
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let $cdata = $cdata.downcast_ref::<cstore::CrateMetadata>()
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.expect("CrateStore crated ata is not a CrateMetadata");
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$compute
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})*
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*providers = Providers {
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$($name,)*
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..*providers
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};
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}
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}
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}
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provide! { <'tcx> tcx, def_id, cdata
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type_of => { cdata.get_type(def_id.index, tcx) }
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generics_of => { tcx.alloc_generics(cdata.get_generics(def_id.index)) }
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predicates_of => { cdata.get_predicates(def_id.index, tcx) }
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super_predicates_of => { cdata.get_super_predicates(def_id.index, tcx) }
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trait_def => {
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tcx.alloc_trait_def(cdata.get_trait_def(def_id.index))
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}
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adt_def => { cdata.get_adt_def(def_id.index, tcx) }
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adt_destructor => {
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let _ = cdata;
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tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
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}
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variances_of => { Rc::new(cdata.get_item_variances(def_id.index)) }
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associated_item_def_ids => {
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let mut result = vec![];
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cdata.each_child_of_item(def_id.index, |child| result.push(child.def.def_id()));
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Rc::new(result)
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}
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associated_item => { cdata.get_associated_item(def_id.index) }
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impl_trait_ref => { cdata.get_impl_trait(def_id.index, tcx) }
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impl_polarity => { cdata.get_impl_polarity(def_id.index) }
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coerce_unsized_info => {
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cdata.get_coerce_unsized_info(def_id.index).unwrap_or_else(|| {
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bug!("coerce_unsized_info: `{:?}` is missing its info", def_id);
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})
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}
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optimized_mir => {
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let mir = cdata.maybe_get_optimized_mir(tcx, def_id.index).unwrap_or_else(|| {
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bug!("get_optimized_mir: missing MIR for `{:?}`", def_id)
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});
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let mir = tcx.alloc_mir(mir);
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mir
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}
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mir_const_qualif => { cdata.mir_const_qualif(def_id.index) }
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typeck_tables_of => { cdata.item_body_tables(def_id.index, tcx) }
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closure_kind => { cdata.closure_kind(def_id.index) }
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closure_type => { cdata.closure_ty(def_id.index, tcx) }
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inherent_impls => { Rc::new(cdata.get_inherent_implementations_for_type(def_id.index)) }
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is_foreign_item => { cdata.is_foreign_item(def_id.index) }
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is_default_impl => { cdata.is_default_impl(def_id.index) }
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describe_def => { cdata.get_def(def_id.index) }
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def_span => { cdata.get_span(def_id.index, &tcx.sess) }
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stability => { cdata.get_stability(def_id.index) }
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deprecation => { cdata.get_deprecation(def_id.index) }
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item_attrs => { cdata.get_item_attrs(def_id.index, &tcx.dep_graph) }
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// FIXME(#38501) We've skipped a `read` on the `HirBody` of
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// a `fn` when encoding, so the dep-tracking wouldn't work.
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// This is only used by rustdoc anyway, which shouldn't have
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// incremental recompilation ever enabled.
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fn_arg_names => { cdata.get_fn_arg_names(def_id.index) }
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impl_parent => { cdata.get_parent_impl(def_id.index) }
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trait_of_item => { cdata.get_trait_of_item(def_id.index) }
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is_exported_symbol => {
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let dep_node = cdata.metadata_dep_node(GlobalMetaDataKind::ExportedSymbols);
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cdata.exported_symbols.get(&tcx.dep_graph, dep_node).contains(&def_id.index)
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}
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item_body_nested_bodies => { Rc::new(cdata.item_body_nested_bodies(def_id.index)) }
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const_is_rvalue_promotable_to_static => {
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cdata.const_is_rvalue_promotable_to_static(def_id.index)
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}
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is_mir_available => { cdata.is_item_mir_available(def_id.index) }
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}
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impl CrateStore for cstore::CStore {
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fn crate_data_as_rc_any(&self, krate: CrateNum) -> Rc<Any> {
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self.get_crate_data(krate)
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}
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fn metadata_loader(&self) -> &MetadataLoader {
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&*self.metadata_loader
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}
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fn visibility(&self, def: DefId) -> ty::Visibility {
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self.dep_graph.read(DepNode::MetaData(def));
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self.get_crate_data(def.krate).get_visibility(def.index)
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}
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fn item_generics_cloned(&self, def: DefId) -> ty::Generics {
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self.dep_graph.read(DepNode::MetaData(def));
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self.get_crate_data(def.krate).get_generics(def.index)
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}
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fn implementations_of_trait(&self, filter: Option<DefId>) -> Vec<DefId>
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{
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let mut result = vec![];
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self.iter_crate_data(|_, cdata| {
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cdata.get_implementations_for_trait(filter, &self.dep_graph, &mut result)
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});
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result
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}
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fn impl_defaultness(&self, def: DefId) -> hir::Defaultness
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{
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self.dep_graph.read(DepNode::MetaData(def));
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self.get_crate_data(def.krate).get_impl_defaultness(def.index)
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}
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fn associated_item_cloned(&self, def: DefId) -> ty::AssociatedItem
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{
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self.dep_graph.read(DepNode::MetaData(def));
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self.get_crate_data(def.krate).get_associated_item(def.index)
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}
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fn is_const_fn(&self, did: DefId) -> bool
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{
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self.dep_graph.read(DepNode::MetaData(did));
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self.get_crate_data(did.krate).is_const_fn(did.index)
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}
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fn is_statically_included_foreign_item(&self, def_id: DefId) -> bool
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{
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self.do_is_statically_included_foreign_item(def_id)
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}
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fn is_dllimport_foreign_item(&self, def_id: DefId) -> bool {
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if def_id.krate == LOCAL_CRATE {
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self.dllimport_foreign_items.borrow().contains(&def_id.index)
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} else {
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self.get_crate_data(def_id.krate)
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.is_dllimport_foreign_item(def_id.index, &self.dep_graph)
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}
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}
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fn dylib_dependency_formats(&self, cnum: CrateNum)
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-> Vec<(CrateNum, LinkagePreference)>
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{
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self.get_crate_data(cnum).get_dylib_dependency_formats(&self.dep_graph)
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}
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fn dep_kind(&self, cnum: CrateNum) -> DepKind
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{
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let data = self.get_crate_data(cnum);
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let dep_node = data.metadata_dep_node(GlobalMetaDataKind::CrateDeps);
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self.dep_graph.read(dep_node);
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data.dep_kind.get()
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}
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fn export_macros(&self, cnum: CrateNum) {
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let data = self.get_crate_data(cnum);
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let dep_node = data.metadata_dep_node(GlobalMetaDataKind::CrateDeps);
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self.dep_graph.read(dep_node);
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if data.dep_kind.get() == DepKind::UnexportedMacrosOnly {
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data.dep_kind.set(DepKind::MacrosOnly)
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}
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}
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fn lang_items(&self, cnum: CrateNum) -> Vec<(DefIndex, usize)>
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{
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self.get_crate_data(cnum).get_lang_items(&self.dep_graph)
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}
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fn missing_lang_items(&self, cnum: CrateNum)
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-> Vec<lang_items::LangItem>
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{
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self.get_crate_data(cnum).get_missing_lang_items(&self.dep_graph)
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}
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fn is_allocator(&self, cnum: CrateNum) -> bool
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{
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self.get_crate_data(cnum).is_allocator(&self.dep_graph)
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}
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fn is_panic_runtime(&self, cnum: CrateNum) -> bool
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{
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self.get_crate_data(cnum).is_panic_runtime(&self.dep_graph)
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}
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fn is_compiler_builtins(&self, cnum: CrateNum) -> bool {
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self.get_crate_data(cnum).is_compiler_builtins(&self.dep_graph)
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}
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fn is_sanitizer_runtime(&self, cnum: CrateNum) -> bool {
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self.get_crate_data(cnum).is_sanitizer_runtime(&self.dep_graph)
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}
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fn is_profiler_runtime(&self, cnum: CrateNum) -> bool {
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self.get_crate_data(cnum).is_profiler_runtime(&self.dep_graph)
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}
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fn panic_strategy(&self, cnum: CrateNum) -> PanicStrategy {
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self.get_crate_data(cnum).panic_strategy(&self.dep_graph)
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}
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fn crate_name(&self, cnum: CrateNum) -> Symbol
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{
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self.get_crate_data(cnum).name
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}
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fn original_crate_name(&self, cnum: CrateNum) -> Symbol
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{
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self.get_crate_data(cnum).name()
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}
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fn extern_crate(&self, cnum: CrateNum) -> Option<ExternCrate>
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{
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self.get_crate_data(cnum).extern_crate.get()
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}
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fn crate_hash(&self, cnum: CrateNum) -> Svh
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{
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self.get_crate_hash(cnum)
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}
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fn crate_disambiguator(&self, cnum: CrateNum) -> Symbol
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{
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self.get_crate_data(cnum).disambiguator()
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}
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fn plugin_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>
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{
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self.get_crate_data(cnum).root.plugin_registrar_fn.map(|index| DefId {
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krate: cnum,
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index: index
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})
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}
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fn derive_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>
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{
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self.get_crate_data(cnum).root.macro_derive_registrar.map(|index| DefId {
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krate: cnum,
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index: index
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})
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}
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fn native_libraries(&self, cnum: CrateNum) -> Vec<NativeLibrary>
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{
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self.get_crate_data(cnum).get_native_libraries(&self.dep_graph)
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}
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fn exported_symbols(&self, cnum: CrateNum) -> Vec<DefId>
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{
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self.get_crate_data(cnum).get_exported_symbols(&self.dep_graph)
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}
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fn is_no_builtins(&self, cnum: CrateNum) -> bool {
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self.get_crate_data(cnum).is_no_builtins(&self.dep_graph)
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}
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fn retrace_path(&self,
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cnum: CrateNum,
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path: &[DisambiguatedDefPathData])
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-> Option<DefId> {
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let cdata = self.get_crate_data(cnum);
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cdata.def_path_table
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.retrace_path(&path)
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.map(|index| DefId { krate: cnum, index: index })
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}
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/// Returns the `DefKey` for a given `DefId`. This indicates the
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/// parent `DefId` as well as some idea of what kind of data the
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/// `DefId` refers to.
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fn def_key(&self, def: DefId) -> DefKey {
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// Note: loading the def-key (or def-path) for a def-id is not
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// a *read* of its metadata. This is because the def-id is
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// really just an interned shorthand for a def-path, which is the
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// canonical name for an item.
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//
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// self.dep_graph.read(DepNode::MetaData(def));
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self.get_crate_data(def.krate).def_key(def.index)
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}
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fn def_path(&self, def: DefId) -> DefPath {
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// See `Note` above in `def_key()` for why this read is
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// commented out:
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//
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// self.dep_graph.read(DepNode::MetaData(def));
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self.get_crate_data(def.krate).def_path(def.index)
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}
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fn def_path_hash(&self, def: DefId) -> DefPathHash {
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self.get_crate_data(def.krate).def_path_hash(def.index)
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}
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fn def_path_table(&self, cnum: CrateNum) -> Rc<DefPathTable> {
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self.get_crate_data(cnum).def_path_table.clone()
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}
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fn struct_field_names(&self, def: DefId) -> Vec<ast::Name>
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{
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self.dep_graph.read(DepNode::MetaData(def));
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self.get_crate_data(def.krate).get_struct_field_names(def.index)
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}
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fn item_children(&self, def_id: DefId) -> Vec<def::Export>
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{
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self.dep_graph.read(DepNode::MetaData(def_id));
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let mut result = vec![];
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self.get_crate_data(def_id.krate)
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.each_child_of_item(def_id.index, |child| result.push(child));
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result
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}
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fn load_macro(&self, id: DefId, sess: &Session) -> LoadedMacro {
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let data = self.get_crate_data(id.krate);
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if let Some(ref proc_macros) = data.proc_macros {
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return LoadedMacro::ProcMacro(proc_macros[id.index.as_usize() - 1].1.clone());
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}
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let (name, def) = data.get_macro(id.index);
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let source_name = format!("<{} macros>", name);
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let filemap = sess.parse_sess.codemap().new_filemap(source_name, def.body);
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let local_span = Span { lo: filemap.start_pos, hi: filemap.end_pos, ctxt: NO_EXPANSION };
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let body = filemap_to_stream(&sess.parse_sess, filemap);
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// Mark the attrs as used
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let attrs = data.get_item_attrs(id.index, &self.dep_graph);
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for attr in attrs.iter() {
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attr::mark_used(attr);
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}
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let name = data.def_key(id.index).disambiguated_data.data
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.get_opt_name().expect("no name in load_macro");
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sess.imported_macro_spans.borrow_mut()
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.insert(local_span, (name.to_string(), data.get_span(id.index, sess)));
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LoadedMacro::MacroDef(ast::Item {
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ident: ast::Ident::with_empty_ctxt(name),
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id: ast::DUMMY_NODE_ID,
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span: local_span,
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attrs: attrs.iter().cloned().collect(),
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node: ast::ItemKind::MacroDef(ast::MacroDef {
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tokens: body.into(),
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legacy: def.legacy,
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}),
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vis: ast::Visibility::Inherited,
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})
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}
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fn item_body<'a, 'tcx>(&self,
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tcx: TyCtxt<'a, 'tcx, 'tcx>,
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def_id: DefId)
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-> &'tcx hir::Body {
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if let Some(cached) = tcx.hir.get_inlined_body(def_id) {
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return cached;
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}
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self.dep_graph.read(DepNode::MetaData(def_id));
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debug!("item_body({:?}): inlining item", def_id);
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self.get_crate_data(def_id.krate).item_body(tcx, def_id.index)
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}
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fn crates(&self) -> Vec<CrateNum>
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{
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let mut result = vec![];
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self.iter_crate_data(|cnum, _| result.push(cnum));
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result
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}
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fn used_libraries(&self) -> Vec<NativeLibrary>
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{
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self.get_used_libraries().borrow().clone()
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}
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fn used_link_args(&self) -> Vec<String>
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{
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self.get_used_link_args().borrow().clone()
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}
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fn used_crates(&self, prefer: LinkagePreference) -> Vec<(CrateNum, LibSource)>
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{
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self.do_get_used_crates(prefer)
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}
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fn used_crate_source(&self, cnum: CrateNum) -> CrateSource
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{
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self.get_crate_data(cnum).source.clone()
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}
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|
|
fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<CrateNum>
|
|
{
|
|
self.do_extern_mod_stmt_cnum(emod_id)
|
|
}
|
|
|
|
fn encode_metadata<'a, 'tcx>(&self,
|
|
tcx: TyCtxt<'a, 'tcx, 'tcx>,
|
|
link_meta: &LinkMeta,
|
|
reachable: &NodeSet)
|
|
-> EncodedMetadata
|
|
{
|
|
encoder::encode_metadata(tcx, link_meta, reachable)
|
|
}
|
|
|
|
fn metadata_encoding_version(&self) -> &[u8]
|
|
{
|
|
schema::METADATA_HEADER
|
|
}
|
|
|
|
/// 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).
|
|
fn visible_parent_map<'a>(&'a self) -> ::std::cell::Ref<'a, DefIdMap<DefId>> {
|
|
{
|
|
let visible_parent_map = self.visible_parent_map.borrow();
|
|
if !visible_parent_map.is_empty() {
|
|
return visible_parent_map;
|
|
}
|
|
}
|
|
|
|
use std::collections::vec_deque::VecDeque;
|
|
use std::collections::hash_map::Entry;
|
|
|
|
let mut visible_parent_map = self.visible_parent_map.borrow_mut();
|
|
|
|
for cnum in (1 .. self.next_crate_num().as_usize()).map(CrateNum::new) {
|
|
let cdata = self.get_crate_data(cnum);
|
|
|
|
match cdata.extern_crate.get() {
|
|
// Ignore crates without a corresponding local `extern crate` item.
|
|
Some(extern_crate) if !extern_crate.direct => continue,
|
|
_ => {},
|
|
}
|
|
|
|
let mut bfs_queue = &mut VecDeque::new();
|
|
let mut add_child = |bfs_queue: &mut VecDeque<_>, child: def::Export, parent: DefId| {
|
|
let child = child.def.def_id();
|
|
|
|
if self.visibility(child) != ty::Visibility::Public {
|
|
return;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
};
|
|
|
|
bfs_queue.push_back(DefId {
|
|
krate: cnum,
|
|
index: CRATE_DEF_INDEX
|
|
});
|
|
while let Some(def) = bfs_queue.pop_front() {
|
|
for child in self.item_children(def) {
|
|
add_child(bfs_queue, child, def);
|
|
}
|
|
}
|
|
}
|
|
|
|
drop(visible_parent_map);
|
|
self.visible_parent_map.borrow()
|
|
}
|
|
}
|