1 use rustc_data_structures::fx::FxHashSet;
2 use rustc_data_structures::sync::Lock;
4 use rustc_hir::def_id::{LocalDefId, CRATE_DEF_INDEX};
5 use rustc_hir::intravisit;
6 use rustc_hir::itemlikevisit::ItemLikeVisitor;
7 use rustc_hir::{HirId, ItemLocalId};
8 use rustc_middle::hir::map::Map;
9 use rustc_middle::ty::TyCtxt;
11 pub fn check_crate(tcx: TyCtxt<'_>) {
12 tcx.dep_graph.assert_ignored();
14 if tcx.sess.opts.debugging_opts.hir_stats {
15 crate::hir_stats::print_hir_stats(tcx);
18 let errors = Lock::new(Vec::new());
19 let hir_map = tcx.hir();
21 hir_map.par_for_each_module(|module_id| {
23 .visit_item_likes_in_module(module_id, &mut OuterVisitor { hir_map, errors: &errors })
26 let errors = errors.into_inner();
28 if !errors.is_empty() {
29 let message = errors.iter().fold(String::new(), |s1, s2| s1 + "\n" + s2);
30 tcx.sess.delay_span_bug(rustc_span::DUMMY_SP, &message);
34 struct HirIdValidator<'a, 'hir> {
36 owner: Option<LocalDefId>,
37 hir_ids_seen: FxHashSet<ItemLocalId>,
38 errors: &'a Lock<Vec<String>>,
41 struct OuterVisitor<'a, 'hir> {
43 errors: &'a Lock<Vec<String>>,
46 impl<'a, 'hir> OuterVisitor<'a, 'hir> {
47 fn new_inner_visitor(&self, hir_map: Map<'hir>) -> HirIdValidator<'a, 'hir> {
51 hir_ids_seen: Default::default(),
57 impl<'a, 'hir> ItemLikeVisitor<'hir> for OuterVisitor<'a, 'hir> {
58 fn visit_item(&mut self, i: &'hir hir::Item<'hir>) {
59 let mut inner_visitor = self.new_inner_visitor(self.hir_map);
60 inner_visitor.check(i.hir_id(), |this| intravisit::walk_item(this, i));
63 fn visit_trait_item(&mut self, i: &'hir hir::TraitItem<'hir>) {
64 let mut inner_visitor = self.new_inner_visitor(self.hir_map);
65 inner_visitor.check(i.hir_id(), |this| intravisit::walk_trait_item(this, i));
68 fn visit_impl_item(&mut self, i: &'hir hir::ImplItem<'hir>) {
69 let mut inner_visitor = self.new_inner_visitor(self.hir_map);
70 inner_visitor.check(i.hir_id(), |this| intravisit::walk_impl_item(this, i));
73 fn visit_foreign_item(&mut self, i: &'hir hir::ForeignItem<'hir>) {
74 let mut inner_visitor = self.new_inner_visitor(self.hir_map);
75 inner_visitor.check(i.hir_id(), |this| intravisit::walk_foreign_item(this, i));
79 impl<'a, 'hir> HirIdValidator<'a, 'hir> {
82 fn error(&self, f: impl FnOnce() -> String) {
83 self.errors.lock().push(f());
86 fn check<F: FnOnce(&mut HirIdValidator<'a, 'hir>)>(&mut self, hir_id: HirId, walk: F) {
87 assert!(self.owner.is_none());
88 let owner = self.hir_map.local_def_id(hir_id);
89 self.owner = Some(owner);
92 if owner.local_def_index == CRATE_DEF_INDEX {
96 // There's always at least one entry for the owning item itself
100 .map(|local_id| local_id.as_usize())
102 .expect("owning item has no entry");
104 if max != self.hir_ids_seen.len() - 1 {
105 // Collect the missing ItemLocalIds
106 let missing: Vec<_> = (0..=max as u32)
107 .filter(|&i| !self.hir_ids_seen.contains(&ItemLocalId::from_u32(i)))
110 // Try to map those to something more useful
111 let mut missing_items = Vec::with_capacity(missing.len());
113 for local_id in missing {
114 let hir_id = HirId { owner, local_id: ItemLocalId::from_u32(local_id) };
116 trace!("missing hir id {:#?}", hir_id);
118 missing_items.push(format!(
119 "[local_id: {}, owner: {}]",
121 self.hir_map.def_path(owner).to_string_no_crate_verbose()
126 "ItemLocalIds not assigned densely in {}. \
127 Max ItemLocalId = {}, missing IDs = {:?}; seens IDs = {:?}",
128 self.hir_map.def_path(owner).to_string_no_crate_verbose(),
133 .map(|&local_id| HirId { owner, local_id })
134 .map(|h| format!("({:?} {})", h, self.hir_map.node_to_string(h)))
142 impl<'a, 'hir> intravisit::Visitor<'hir> for HirIdValidator<'a, 'hir> {
143 type Map = Map<'hir>;
145 fn nested_visit_map(&mut self) -> intravisit::NestedVisitorMap<Self::Map> {
146 intravisit::NestedVisitorMap::OnlyBodies(self.hir_map)
149 fn visit_id(&mut self, hir_id: HirId) {
150 let owner = self.owner.expect("no owner");
152 if owner != hir_id.owner {
155 "HirIdValidator: The recorded owner of {} is {} instead of {}",
156 self.hir_map.node_to_string(hir_id),
157 self.hir_map.def_path(hir_id.owner).to_string_no_crate_verbose(),
158 self.hir_map.def_path(owner).to_string_no_crate_verbose()
163 self.hir_ids_seen.insert(hir_id.local_id);
166 fn visit_impl_item_ref(&mut self, _: &'hir hir::ImplItemRef) {
167 // Explicitly do nothing here. ImplItemRefs contain hir::Visibility
168 // values that actually belong to an ImplItem instead of the ItemKind::Impl
169 // we are currently in. So for those it's correct that they have a
173 fn visit_foreign_item_ref(&mut self, _: &'hir hir::ForeignItemRef) {
174 // Explicitly do nothing here. ForeignItemRefs contain hir::Visibility
175 // values that actually belong to an ForeignItem instead of the ItemKind::ForeignMod
176 // we are currently in. So for those it's correct that they have a