624 lines
21 KiB
Rust
624 lines
21 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 locator;
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use schema;
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use rustc::middle::cstore::{InlinedItem, CrateStore, CrateSource, LibSource, DepKind, ExternCrate};
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use rustc::middle::cstore::{NativeLibrary, LinkMeta, LinkagePreference, LoadedMacro};
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use rustc::hir::def::{self, 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, Ty, TyCtxt};
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use rustc::hir::def_id::{CrateNum, DefId, DefIndex, CRATE_DEF_INDEX};
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use rustc::dep_graph::DepNode;
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use rustc::hir::map as hir_map;
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use rustc::hir::map::DefKey;
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use rustc::mir::Mir;
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use rustc::util::nodemap::{NodeSet, DefIdMap};
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use rustc_back::PanicStrategy;
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use syntax::ast;
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use syntax::attr;
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use syntax::parse::new_parser_from_source_str;
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use syntax::symbol::Symbol;
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use syntax_pos::{mk_sp, Span};
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use rustc::hir::svh::Svh;
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use rustc_back::target::Target;
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use rustc::hir;
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impl<'tcx> CrateStore<'tcx> for cstore::CStore {
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fn describe_def(&self, def: DefId) -> Option<Def> {
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self.dep_graph.read(DepNode::MetaData(def));
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self.get_crate_data(def.krate).get_def(def.index)
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}
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fn def_span(&self, sess: &Session, def: DefId) -> Span {
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self.dep_graph.read(DepNode::MetaData(def));
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self.get_crate_data(def.krate).get_span(def.index, sess)
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}
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fn stability(&self, def: DefId) -> Option<attr::Stability> {
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self.dep_graph.read(DepNode::MetaData(def));
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self.get_crate_data(def.krate).get_stability(def.index)
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}
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fn deprecation(&self, def: DefId) -> Option<attr::Deprecation> {
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self.dep_graph.read(DepNode::MetaData(def));
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self.get_crate_data(def.krate).get_deprecation(def.index)
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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 closure_kind(&self, def_id: DefId) -> ty::ClosureKind
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{
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assert!(!def_id.is_local());
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self.dep_graph.read(DepNode::MetaData(def_id));
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self.get_crate_data(def_id.krate).closure_kind(def_id.index)
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}
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fn closure_ty<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> ty::ClosureTy<'tcx> {
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assert!(!def_id.is_local());
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self.dep_graph.read(DepNode::MetaData(def_id));
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self.get_crate_data(def_id.krate).closure_ty(def_id.index, tcx)
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}
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fn item_variances(&self, def: DefId) -> Vec<ty::Variance> {
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self.dep_graph.read(DepNode::MetaData(def));
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self.get_crate_data(def.krate).get_item_variances(def.index)
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}
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fn item_type<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
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-> Ty<'tcx>
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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_type(def.index, tcx)
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}
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fn item_predicates<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
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-> ty::GenericPredicates<'tcx>
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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_predicates(def.index, tcx)
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}
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fn item_super_predicates<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
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-> ty::GenericPredicates<'tcx>
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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_super_predicates(def.index, tcx)
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}
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fn item_generics<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
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-> ty::Generics<'tcx>
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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_generics(def.index, tcx)
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}
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fn item_attrs(&self, def_id: DefId) -> Vec<ast::Attribute>
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{
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self.dep_graph.read(DepNode::MetaData(def_id));
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self.get_crate_data(def_id.krate).get_item_attrs(def_id.index)
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}
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fn trait_def<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId) -> ty::TraitDef
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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_trait_def(def.index, tcx)
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}
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fn adt_def<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId) -> &'tcx ty::AdtDef
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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_adt_def(def.index, tcx)
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}
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fn fn_arg_names(&self, did: DefId) -> Vec<ast::Name>
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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).get_fn_arg_names(did.index)
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}
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fn inherent_implementations_for_type(&self, def_id: DefId) -> Vec<DefId>
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{
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self.dep_graph.read(DepNode::MetaData(def_id));
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self.get_crate_data(def_id.krate).get_inherent_implementations_for_type(def_id.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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if let Some(def_id) = filter {
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self.dep_graph.read(DepNode::MetaData(def_id));
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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, &mut result)
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});
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result
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}
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fn associated_item_def_ids(&self, def_id: DefId) -> Vec<DefId> {
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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.def.def_id()));
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result
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}
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fn impl_polarity(&self, def: DefId) -> hir::ImplPolarity
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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_polarity(def.index)
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}
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fn impl_trait_ref<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
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-> Option<ty::TraitRef<'tcx>>
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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_trait(def.index, tcx)
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}
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fn custom_coerce_unsized_kind(&self, def: DefId)
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-> Option<ty::adjustment::CustomCoerceUnsized>
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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_custom_coerce_unsized_kind(def.index)
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}
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fn impl_parent(&self, impl_def: DefId) -> Option<DefId> {
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self.dep_graph.read(DepNode::MetaData(impl_def));
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self.get_crate_data(impl_def.krate).get_parent_impl(impl_def.index)
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}
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fn trait_of_item(&self, def_id: DefId) -> Option<DefId> {
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self.dep_graph.read(DepNode::MetaData(def_id));
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self.get_crate_data(def_id.krate).get_trait_of_item(def_id.index)
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}
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fn associated_item<'a>(&self, _tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
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-> Option<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_defaulted_trait(&self, trait_def_id: DefId) -> bool
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{
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self.dep_graph.read(DepNode::MetaData(trait_def_id));
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self.get_crate_data(trait_def_id.krate).is_defaulted_trait(trait_def_id.index)
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}
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fn is_default_impl(&self, impl_did: DefId) -> bool {
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self.dep_graph.read(DepNode::MetaData(impl_did));
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self.get_crate_data(impl_did.krate).is_default_impl(impl_did.index)
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}
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fn is_foreign_item(&self, did: DefId) -> bool {
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self.get_crate_data(did.krate).is_foreign_item(did.index)
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}
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fn is_statically_included_foreign_item(&self, id: ast::NodeId) -> bool
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{
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self.do_is_statically_included_foreign_item(id)
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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()
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}
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fn dep_kind(&self, cnum: CrateNum) -> DepKind
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{
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self.get_crate_data(cnum).dep_kind.get()
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}
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fn export_macros(&self, cnum: CrateNum) {
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if self.get_crate_data(cnum).dep_kind.get() == DepKind::UnexportedMacrosOnly {
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self.get_crate_data(cnum).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()
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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()
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}
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fn is_staged_api(&self, cnum: CrateNum) -> bool
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{
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self.get_crate_data(cnum).is_staged_api()
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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()
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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()
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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()
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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()
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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 native_libraries(&self, cnum: CrateNum) -> Vec<NativeLibrary>
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{
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self.get_crate_data(cnum).get_native_libraries()
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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()
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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()
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}
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fn def_index_for_def_key(&self,
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cnum: CrateNum,
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def: DefKey)
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-> Option<DefIndex> {
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let cdata = self.get_crate_data(cnum);
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cdata.key_map.get(&def).cloned()
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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) -> hir_map::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 relative_def_path(&self, def: DefId) -> Option<hir_map::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 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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// NB: Don't use parse_tts_from_source_str because it parses with quote_depth > 0.
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let mut parser = new_parser_from_source_str(&sess.parse_sess, source_name, def.body);
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let lo = parser.span.lo;
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let body = match parser.parse_all_token_trees() {
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Ok(body) => body,
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Err(mut err) => {
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err.emit();
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sess.abort_if_errors();
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unreachable!();
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}
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};
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let local_span = mk_sp(lo, parser.prev_span.hi);
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// Mark the attrs as used
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let attrs = data.get_item_attrs(id.index);
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for attr in &attrs {
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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::MacroRules(ast::MacroDef {
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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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imported_from: None, // FIXME
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allow_internal_unstable: attr::contains_name(&attrs, "allow_internal_unstable"),
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attrs: attrs,
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body: body,
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})
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}
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fn maybe_get_item_ast<'a>(&'tcx self,
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tcx: TyCtxt<'a, 'tcx, 'tcx>,
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def_id: DefId)
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-> Option<(&'tcx InlinedItem, ast::NodeId)>
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{
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self.dep_graph.read(DepNode::MetaData(def_id));
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match self.inlined_item_cache.borrow().get(&def_id) {
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Some(&None) => {
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return None; // Not inlinable
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}
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Some(&Some(ref cached_inlined_item)) => {
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// Already inline
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debug!("maybe_get_item_ast({}): already inline as node id {}",
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tcx.item_path_str(def_id), cached_inlined_item.item_id);
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return Some((tcx.map.expect_inlined_item(cached_inlined_item.inlined_root),
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cached_inlined_item.item_id));
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}
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None => {
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// Not seen yet
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}
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}
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debug!("maybe_get_item_ast({}): inlining item", tcx.item_path_str(def_id));
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let inlined = self.get_crate_data(def_id.krate).maybe_get_item_ast(tcx, def_id.index);
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let cache_inlined_item = |original_def_id, inlined_item_id, inlined_root_node_id| {
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let cache_entry = cstore::CachedInlinedItem {
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inlined_root: inlined_root_node_id,
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|
item_id: inlined_item_id,
|
|
};
|
|
self.inlined_item_cache
|
|
.borrow_mut()
|
|
.insert(original_def_id, Some(cache_entry));
|
|
self.defid_for_inlined_node
|
|
.borrow_mut()
|
|
.insert(inlined_item_id, original_def_id);
|
|
};
|
|
|
|
let find_inlined_item_root = |inlined_item_id| {
|
|
let mut node = inlined_item_id;
|
|
|
|
// If we can't find the inline root after a thousand hops, we can
|
|
// be pretty sure there's something wrong with the HIR map.
|
|
for _ in 0 .. 1000 {
|
|
let parent_node = tcx.map.get_parent_node(node);
|
|
if parent_node == node {
|
|
return node;
|
|
}
|
|
node = parent_node;
|
|
}
|
|
bug!("cycle in HIR map parent chain")
|
|
};
|
|
|
|
match inlined {
|
|
None => {
|
|
self.inlined_item_cache
|
|
.borrow_mut()
|
|
.insert(def_id, None);
|
|
}
|
|
Some(&InlinedItem { ref body, .. }) => {
|
|
let inlined_root_node_id = find_inlined_item_root(body.id);
|
|
cache_inlined_item(def_id, inlined_root_node_id, inlined_root_node_id);
|
|
}
|
|
}
|
|
|
|
// We can be sure to hit the cache now
|
|
return self.maybe_get_item_ast(tcx, def_id);
|
|
}
|
|
|
|
fn local_node_for_inlined_defid(&'tcx self, def_id: DefId) -> Option<ast::NodeId> {
|
|
assert!(!def_id.is_local());
|
|
match self.inlined_item_cache.borrow().get(&def_id) {
|
|
Some(&Some(ref cached_inlined_item)) => {
|
|
Some(cached_inlined_item.item_id)
|
|
}
|
|
Some(&None) => {
|
|
None
|
|
}
|
|
_ => {
|
|
bug!("Trying to lookup inlined NodeId for unexpected item");
|
|
}
|
|
}
|
|
}
|
|
|
|
fn defid_for_inlined_node(&'tcx self, node_id: ast::NodeId) -> Option<DefId> {
|
|
self.defid_for_inlined_node.borrow().get(&node_id).map(|x| *x)
|
|
}
|
|
|
|
fn get_item_mir<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId) -> Mir<'tcx> {
|
|
self.dep_graph.read(DepNode::MetaData(def));
|
|
self.get_crate_data(def.krate).maybe_get_item_mir(tcx, def.index).unwrap_or_else(|| {
|
|
bug!("get_item_mir: missing MIR for {}", tcx.item_path_str(def))
|
|
})
|
|
}
|
|
|
|
fn is_item_mir_available(&self, def: DefId) -> bool {
|
|
self.dep_graph.read(DepNode::MetaData(def));
|
|
self.get_crate_data(def.krate).is_item_mir_available(def.index)
|
|
}
|
|
|
|
fn crates(&self) -> Vec<CrateNum>
|
|
{
|
|
let mut result = vec![];
|
|
self.iter_crate_data(|cnum, _| result.push(cnum));
|
|
result
|
|
}
|
|
|
|
fn used_libraries(&self) -> Vec<NativeLibrary>
|
|
{
|
|
self.get_used_libraries().borrow().clone()
|
|
}
|
|
|
|
fn used_link_args(&self) -> Vec<String>
|
|
{
|
|
self.get_used_link_args().borrow().clone()
|
|
}
|
|
|
|
fn metadata_filename(&self) -> &str
|
|
{
|
|
locator::METADATA_FILENAME
|
|
}
|
|
|
|
fn metadata_section_name(&self, target: &Target) -> &str
|
|
{
|
|
locator::meta_section_name(target)
|
|
}
|
|
|
|
fn used_crates(&self, prefer: LinkagePreference) -> Vec<(CrateNum, LibSource)>
|
|
{
|
|
self.do_get_used_crates(prefer)
|
|
}
|
|
|
|
fn used_crate_source(&self, cnum: CrateNum) -> CrateSource
|
|
{
|
|
self.get_crate_data(cnum).source.clone()
|
|
}
|
|
|
|
fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<CrateNum>
|
|
{
|
|
self.do_extern_mod_stmt_cnum(emod_id)
|
|
}
|
|
|
|
fn encode_metadata<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>,
|
|
reexports: &def::ExportMap,
|
|
link_meta: &LinkMeta,
|
|
reachable: &NodeSet) -> Vec<u8>
|
|
{
|
|
encoder::encode_metadata(tcx, self, reexports, 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::RefMut<'a, DefIdMap<DefId>> {
|
|
let mut visible_parent_map = self.visible_parent_map.borrow_mut();
|
|
if !visible_parent_map.is_empty() { return visible_parent_map; }
|
|
|
|
use std::collections::vec_deque::VecDeque;
|
|
use std::collections::hash_map::Entry;
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
visible_parent_map
|
|
}
|
|
}
|