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use rustc_data_structures::sync::Lock;
use rustc_hir as hir;
use rustc_hir::def_id::{LocalDefId, CRATE_DEF_ID};
use rustc_hir::intravisit;
use rustc_hir::{HirId, ItemLocalId};
use rustc_index::bit_set::GrowableBitSet;
use rustc_middle::hir::map::Map;
use rustc_middle::hir::nested_filter;
use rustc_middle::ty::TyCtxt;
pub fn check_crate(tcx: TyCtxt<'_>) {
tcx.dep_graph.assert_ignored();
if tcx.sess.opts.unstable_opts.hir_stats {
crate::hir_stats::print_hir_stats(tcx);
}
#[cfg(debug_assertions)]
{
let errors = Lock::new(Vec::new());
let hir_map = tcx.hir();
hir_map.par_for_each_module(|module_id| {
let mut v = HirIdValidator {
hir_map,
owner: None,
hir_ids_seen: Default::default(),
errors: &errors,
};
tcx.hir().visit_item_likes_in_module(module_id, &mut v);
});
let errors = errors.into_inner();
if !errors.is_empty() {
let message = errors.iter().fold(String::new(), |s1, s2| s1 + "\n" + s2);
tcx.sess.delay_span_bug(rustc_span::DUMMY_SP, &message);
}
}
}
struct HirIdValidator<'a, 'hir> {
hir_map: Map<'hir>,
owner: Option<LocalDefId>,
hir_ids_seen: GrowableBitSet<ItemLocalId>,
errors: &'a Lock<Vec<String>>,
}
impl<'a, 'hir> HirIdValidator<'a, 'hir> {
fn new_visitor(&self, hir_map: Map<'hir>) -> HirIdValidator<'a, 'hir> {
HirIdValidator {
hir_map,
owner: None,
hir_ids_seen: Default::default(),
errors: self.errors,
}
}
#[cold]
#[inline(never)]
fn error(&self, f: impl FnOnce() -> String) {
self.errors.lock().push(f());
}
fn check<F: FnOnce(&mut HirIdValidator<'a, 'hir>)>(&mut self, owner: LocalDefId, walk: F) {
assert!(self.owner.is_none());
self.owner = Some(owner);
walk(self);
if owner == CRATE_DEF_ID {
return;
}
// There's always at least one entry for the owning item itself
let max = self
.hir_ids_seen
.iter()
.map(|local_id| local_id.as_usize())
.max()
.expect("owning item has no entry");
if max != self.hir_ids_seen.len() - 1 {
// Collect the missing ItemLocalIds
let missing: Vec<_> = (0..=max as u32)
.filter(|&i| !self.hir_ids_seen.contains(ItemLocalId::from_u32(i)))
.collect();
// Try to map those to something more useful
let mut missing_items = Vec::with_capacity(missing.len());
for local_id in missing {
let hir_id = HirId { owner, local_id: ItemLocalId::from_u32(local_id) };
trace!("missing hir id {:#?}", hir_id);
missing_items.push(format!(
"[local_id: {}, owner: {}]",
local_id,
self.hir_map.def_path(owner).to_string_no_crate_verbose()
));
}
self.error(|| {
format!(
"ItemLocalIds not assigned densely in {}. \
Max ItemLocalId = {}, missing IDs = {:?}; seens IDs = {:?}",
self.hir_map.def_path(owner).to_string_no_crate_verbose(),
max,
missing_items,
self.hir_ids_seen
.iter()
.map(|local_id| HirId { owner, local_id })
.map(|h| format!("({:?} {})", h, self.hir_map.node_to_string(h)))
.collect::<Vec<_>>()
)
});
}
}
}
impl<'a, 'hir> intravisit::Visitor<'hir> for HirIdValidator<'a, 'hir> {
type NestedFilter = nested_filter::OnlyBodies;
fn nested_visit_map(&mut self) -> Self::Map {
self.hir_map
}
fn visit_item(&mut self, i: &'hir hir::Item<'hir>) {
let mut inner_visitor = self.new_visitor(self.hir_map);
inner_visitor.check(i.def_id, |this| intravisit::walk_item(this, i));
}
fn visit_id(&mut self, hir_id: HirId) {
let owner = self.owner.expect("no owner");
if owner != hir_id.owner {
self.error(|| {
format!(
"HirIdValidator: The recorded owner of {} is {} instead of {}",
self.hir_map.node_to_string(hir_id),
self.hir_map.def_path(hir_id.owner).to_string_no_crate_verbose(),
self.hir_map.def_path(owner).to_string_no_crate_verbose()
)
});
}
self.hir_ids_seen.insert(hir_id.local_id);
}
fn visit_foreign_item(&mut self, i: &'hir hir::ForeignItem<'hir>) {
let mut inner_visitor = self.new_visitor(self.hir_map);
inner_visitor.check(i.def_id, |this| intravisit::walk_foreign_item(this, i));
}
fn visit_trait_item(&mut self, i: &'hir hir::TraitItem<'hir>) {
let mut inner_visitor = self.new_visitor(self.hir_map);
inner_visitor.check(i.def_id, |this| intravisit::walk_trait_item(this, i));
}
fn visit_impl_item(&mut self, i: &'hir hir::ImplItem<'hir>) {
let mut inner_visitor = self.new_visitor(self.hir_map);
inner_visitor.check(i.def_id, |this| intravisit::walk_impl_item(this, i));
}
}
|
