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Revert #18668 - Add mprotect diagnostics for HashMap crash

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This commit is contained in:
Bobby Holley 2017-10-03 10:04:43 -07:00
parent e07c6f38a5
commit 15b866d8de
17 changed files with 9 additions and 448 deletions
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49
components/style/selector_map.rs
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@ -10,7 +10,7 @@ use applicable_declarations::ApplicableDeclarationBlock;
use context::QuirksMode;
use dom::TElement;
use fallible::FallibleVec;
use hash::{HashMap, HashSet, ProtectedHashMap};
use hash::{HashMap, HashSet};
use hash::map as hash_map;
use hashglobe::FailedAllocationError;
use pdqsort::sort_by;
@ -38,9 +38,6 @@ impl Default for PrecomputedHasher {
/// A simple alias for a hashmap using PrecomputedHasher.
pub type PrecomputedHashMap<K, V> = HashMap<K, V, BuildHasherDefault<PrecomputedHasher>>;
/// A simple alias for a hashmap using PrecomputedHasher.
pub type PrecomputedProtectedHashMap<K, V> = ProtectedHashMap<K, V, BuildHasherDefault<PrecomputedHasher>>;
/// A simple alias for a hashset using PrecomputedHasher.
pub type PrecomputedHashSet<K> = HashSet<K, BuildHasherDefault<PrecomputedHasher>>;
@ -105,7 +102,7 @@ pub struct SelectorMap<T: 'static> {
/// A hash from a class name to rules which contain that class selector.
pub class_hash: MaybeCaseInsensitiveHashMap<Atom, SmallVec<[T; 1]>>,
/// A hash from local name to rules which contain that local name selector.
pub local_name_hash: PrecomputedProtectedHashMap<LocalName, SmallVec<[T; 1]>>,
pub local_name_hash: PrecomputedHashMap<LocalName, SmallVec<[T; 1]>>,
/// Rules that don't have ID, class, or element selectors.
pub other: SmallVec<[T; 1]>,
/// The number of entries in this map.
@ -126,7 +123,7 @@ impl<T: 'static> SelectorMap<T> {
SelectorMap {
id_hash: MaybeCaseInsensitiveHashMap::new(),
class_hash: MaybeCaseInsensitiveHashMap::new(),
local_name_hash: ProtectedHashMap::default(),
local_name_hash: HashMap::default(),
other: SmallVec::new(),
count: 0,
}
@ -150,30 +147,6 @@ impl<T: 'static> SelectorMap<T> {
pub fn len(&self) -> usize {
self.count
}
/// Allows mutation of this SelectorMap.
#[cfg(feature = "gecko")]
pub fn begin_mutation(&mut self) {
self.id_hash.begin_mutation();
self.class_hash.begin_mutation();
self.local_name_hash.begin_mutation();
}
/// Allows mutation of this SelectorMap. Not enforced in Servo.
#[cfg(feature = "servo")]
pub fn begin_mutation(&mut self) {}
/// Disallows mutation of this SelectorMap.
#[cfg(feature = "gecko")]
pub fn end_mutation(&mut self) {
self.id_hash.end_mutation();
self.class_hash.end_mutation();
self.local_name_hash.end_mutation();
}
/// Disallows mutation of this SelectorMap. Not enforced in Servo.
#[cfg(feature = "servo")]
pub fn end_mutation(&mut self) {}
}
impl SelectorMap<Rule> {
@ -490,7 +463,7 @@ fn find_bucket<'a>(mut iter: SelectorIter<'a, SelectorImpl>) -> Bucket<'a> {
#[derive(Debug)]
#[cfg_attr(feature = "gecko", derive(MallocSizeOf))]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
pub struct MaybeCaseInsensitiveHashMap<K: PrecomputedHash + Hash + Eq, V: 'static>(PrecomputedProtectedHashMap<K, V>);
pub struct MaybeCaseInsensitiveHashMap<K: PrecomputedHash + Hash + Eq, V: 'static>(PrecomputedHashMap<K, V>);
// FIXME(Manishearth) the 'static bound can be removed when
// our HashMap fork (hashglobe) is able to use NonZero,
@ -498,7 +471,7 @@ pub struct MaybeCaseInsensitiveHashMap<K: PrecomputedHash + Hash + Eq, V: 'stati
impl<V: 'static> MaybeCaseInsensitiveHashMap<Atom, V> {
/// Empty map
pub fn new() -> Self {
MaybeCaseInsensitiveHashMap(PrecomputedProtectedHashMap::default())
MaybeCaseInsensitiveHashMap(PrecomputedHashMap::default())
}
/// HashMap::entry
@ -539,17 +512,5 @@ impl<V: 'static> MaybeCaseInsensitiveHashMap<Atom, V> {
self.0.get(key)
}
}
/// ProtectedHashMap::begin_mutation
#[cfg(feature = "gecko")]
pub fn begin_mutation(&mut self) {
self.0.begin_mutation();
}
/// ProtectedHashMap::end_mutation
#[cfg(feature = "gecko")]
pub fn end_mutation(&mut self) {
self.0.end_mutation();
}
}