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-rw-r--r--components/hashglobe/src/diagnostic.rs243
-rw-r--r--components/hashglobe/src/fake.rs14
-rw-r--r--components/hashglobe/src/hash_map.rs27
-rw-r--r--components/hashglobe/src/lib.rs1
-rw-r--r--components/hashglobe/src/table.rs148
-rw-r--r--components/malloc_size_of/lib.rs19
-rw-r--r--components/style/context.rs6
-rw-r--r--components/style/custom_properties.rs25
-rw-r--r--components/style/hash.rs7
-rw-r--r--components/style/invalidation/element/invalidation_map.rs34
-rw-r--r--components/style/selector_map.rs74
-rw-r--r--components/style/selector_parser.rs9
-rw-r--r--components/style/stylist.rs40
13 files changed, 99 insertions, 548 deletions
diff --git a/components/hashglobe/src/diagnostic.rs b/components/hashglobe/src/diagnostic.rs
deleted file mode 100644
index cee5e11d4b1..00000000000
--- a/components/hashglobe/src/diagnostic.rs
+++ /dev/null
@@ -1,243 +0,0 @@
-use hash_map::HashMap;
-use std::borrow::Borrow;
-use std::hash::{BuildHasher, Hash};
-use std::ptr;
-
-use FailedAllocationError;
-
-#[cfg(target_pointer_width = "32")]
-const CANARY: usize = 0x42cafe99;
-#[cfg(target_pointer_width = "64")]
-const CANARY: usize = 0x42cafe9942cafe99;
-
-#[cfg(target_pointer_width = "32")]
-const POISON: usize = 0xdeadbeef;
-#[cfg(target_pointer_width = "64")]
-const POISON: usize = 0xdeadbeefdeadbeef;
-
-#[derive(Clone, Debug)]
-enum JournalEntry {
- Insert(usize),
- GOIW(usize),
- Remove(usize),
- DidClear(usize),
-}
-
-#[derive(Clone, Debug)]
-pub struct DiagnosticHashMap<K, V, S>
- where K: Eq + Hash,
- S: BuildHasher
-{
- map: HashMap<K, (usize, V), S>,
- journal: Vec<JournalEntry>,
- readonly: bool,
-}
-
-impl<K: Hash + Eq, V, S: BuildHasher> DiagnosticHashMap<K, V, S>
- where K: Eq + Hash,
- S: BuildHasher
-{
- #[inline(always)]
- pub fn inner(&self) -> &HashMap<K, (usize, V), S> {
- &self.map
- }
-
- #[inline(never)]
- pub fn begin_mutation(&mut self) {
- self.map.verify();
- assert!(self.readonly);
- self.readonly = false;
- self.verify();
- }
-
- #[inline(never)]
- pub fn end_mutation(&mut self) {
- self.map.verify();
- assert!(!self.readonly);
- self.readonly = true;
- self.verify();
- }
-
- fn verify(&self) {
- let mut position = 0;
- let mut count = 0;
- let mut bad_canary = None;
-
- let mut iter = self.map.iter();
- while let Some((h, _, v)) = iter.next_with_hash() {
- let canary_ref = &v.0;
- position += 1;
-
- if *canary_ref == CANARY {
- continue;
- }
-
- count += 1;
- bad_canary = Some((h, *canary_ref, canary_ref, position));
- }
- if let Some(c) = bad_canary {
- self.report_corruption(c.0, c.1, c.2, c.3, count);
- }
- }
-
- #[inline(always)]
- pub fn with_hasher(hash_builder: S) -> Self {
- Self {
- map: HashMap::<K, (usize, V), S>::with_hasher(hash_builder),
- journal: Vec::new(),
- readonly: true,
- }
- }
-
- #[inline(always)]
- pub fn len(&self) -> usize {
- self.map.len()
- }
-
- #[inline(always)]
- pub fn is_empty(&self) -> bool {
- self.map.is_empty()
- }
-
- #[inline(always)]
- pub fn contains_key<Q: ?Sized>(&self, k: &Q) -> bool
- where K: Borrow<Q>,
- Q: Hash + Eq
- {
- self.map.contains_key(k)
- }
-
- #[inline(always)]
- pub fn get<Q: ?Sized>(&self, k: &Q) -> Option<&V>
- where K: Borrow<Q>,
- Q: Hash + Eq
- {
- self.map.get(k).map(|v| &v.1)
- }
-
- #[inline(always)]
- pub fn try_get_or_insert_with<F: FnOnce() -> V>(
- &mut self,
- key: K,
- default: F
- ) -> Result<&mut V, FailedAllocationError> {
- assert!(!self.readonly);
- self.journal.push(JournalEntry::GOIW(self.map.make_hash(&key).inspect()));
- let entry = self.map.try_entry(key)?;
- Ok(&mut entry.or_insert_with(|| (CANARY, default())).1)
- }
-
- #[inline(always)]
- pub fn try_insert(&mut self, k: K, v: V) -> Result<Option<V>, FailedAllocationError> {
- assert!(!self.readonly);
- self.journal.push(JournalEntry::Insert(self.map.make_hash(&k).inspect()));
- let old = self.map.try_insert(k, (CANARY, v))?;
- Ok(old.map(|x| x.1))
- }
-
- #[inline(always)]
- pub fn remove<Q: ?Sized>(&mut self, k: &Q) -> Option<V>
- where K: Borrow<Q>,
- Q: Hash + Eq
- {
- assert!(!self.readonly);
- self.journal.push(JournalEntry::Remove(self.map.make_hash(k).inspect()));
- if let Some(v) = self.map.get_mut(k) {
- unsafe { ptr::write_volatile(&mut v.0, POISON); }
- }
- self.map.remove(k).map(|x| x.1)
- }
-
- #[inline(always)]
- pub fn clear(&mut self) where K: 'static, V: 'static {
- // We handle scoped mutations for the caller here, since callsites that
- // invoke clear() don't benefit from the coalescing we do around insertion.
- self.begin_mutation();
- self.journal.clear();
- self.journal.push(JournalEntry::DidClear(self.map.raw_capacity()));
- self.map.clear();
- self.end_mutation();
- }
-
- #[inline(never)]
- fn report_corruption(
- &self,
- hash: usize,
- canary: usize,
- canary_addr: *const usize,
- position: usize,
- count: usize
- ) {
- use ::std::ffi::CString;
- let key = b"HashMapJournal\0";
- let value = CString::new(format!("{:?}", self.journal)).unwrap();
- unsafe {
- Gecko_AnnotateCrashReport(
- key.as_ptr() as *const ::std::os::raw::c_char,
- value.as_ptr(),
- );
- }
-
- panic!(
- concat!("HashMap Corruption (sz={}, buffer_hash_sz={}, cap={}, pairsz={}, hash={:#x}, cnry={:#x}, ",
- "count={}, last_pos={}, base_addr={:?}, cnry_addr={:?}, jrnl_len={})"),
- self.map.len(),
- self.map.diagnostic_count_hashes(),
- self.map.raw_capacity(),
- ::std::mem::size_of::<(K, (usize, V))>(),
- hash,
- canary,
- count,
- position,
- self.map.raw_buffer(),
- canary_addr,
- self.journal.len(),
- );
- }
-}
-
-impl<K, V, S> PartialEq for DiagnosticHashMap<K, V, S>
- where K: Eq + Hash,
- V: PartialEq,
- S: BuildHasher
-{
- fn eq(&self, other: &Self) -> bool {
- self.map.eq(&other.map)
- }
-}
-
-impl<K, V, S> Eq for DiagnosticHashMap<K, V, S>
- where K: Eq + Hash,
- V: Eq,
- S: BuildHasher
-{
-}
-
-impl<K, V, S> Default for DiagnosticHashMap<K, V, S>
- where K: Eq + Hash,
- S: BuildHasher + Default
-{
- fn default() -> Self {
- Self {
- map: HashMap::default(),
- journal: Vec::new(),
- readonly: true,
- }
- }
-}
-
-impl<K: Hash + Eq, V, S: BuildHasher> Drop for DiagnosticHashMap<K, V, S>
- where K: Eq + Hash,
- S: BuildHasher
-{
- fn drop(&mut self) {
- self.map.verify();
- debug_assert!(self.readonly, "Dropped while mutating");
- self.verify();
- }
-}
-
-extern "C" {
- pub fn Gecko_AnnotateCrashReport(key_str: *const ::std::os::raw::c_char,
- value_str: *const ::std::os::raw::c_char);
-}
diff --git a/components/hashglobe/src/fake.rs b/components/hashglobe/src/fake.rs
index 1d29296f000..eba21e04148 100644
--- a/components/hashglobe/src/fake.rs
+++ b/components/hashglobe/src/fake.rs
@@ -76,24 +76,10 @@ impl<K, V, S> HashMap<K, V, S>
Ok(self.entry(key))
}
- #[inline(always)]
- pub fn try_get_or_insert_with<F: FnOnce() -> V>(
- &mut self,
- key: K,
- default: F
- ) -> Result<&mut V, FailedAllocationError> {
- Ok(self.entry(key).or_insert_with(default))
- }
-
#[inline]
pub fn try_insert(&mut self, k: K, v: V) -> Result<Option<V>, FailedAllocationError> {
Ok(self.insert(k, v))
}
-
- #[inline(always)]
- pub fn begin_mutation(&mut self) {}
- #[inline(always)]
- pub fn end_mutation(&mut self) {}
}
#[derive(Clone)]
diff --git a/components/hashglobe/src/hash_map.rs b/components/hashglobe/src/hash_map.rs
index 4c1d73fc0de..5b3f7b7c02b 100644
--- a/components/hashglobe/src/hash_map.rs
+++ b/components/hashglobe/src/hash_map.rs
@@ -534,7 +534,7 @@ impl<K, V, S> HashMap<K, V, S>
where K: Eq + Hash,
S: BuildHasher
{
- pub fn make_hash<X: ?Sized>(&self, x: &X) -> SafeHash
+ fn make_hash<X: ?Sized>(&self, x: &X) -> SafeHash
where X: Hash
{
table::make_hash(&self.hash_builder, x)
@@ -683,23 +683,10 @@ impl<K, V, S> HashMap<K, V, S>
/// Returns the hash map's raw capacity.
#[inline]
- pub fn raw_capacity(&self) -> usize {
+ fn raw_capacity(&self) -> usize {
self.table.capacity()
}
- /// Returns a raw pointer to the table's buffer.
- #[inline]
- pub fn raw_buffer(&self) -> *const u8 {
- assert!(self.len() != 0);
- self.table.raw_buffer()
- }
-
- /// Verify that the table metadata is internally consistent.
- #[inline]
- pub fn verify(&self) {
- self.table.verify();
- }
-
/// Reserves capacity for at least `additional` more elements to be inserted
/// in the `HashMap`. The collection may reserve more space to avoid
/// frequent reallocations.
@@ -1257,10 +1244,6 @@ impl<K, V, S> HashMap<K, V, S>
debug_assert!(elems_left == 0 || bucket.index() != start_index);
}
}
-
- pub fn diagnostic_count_hashes(&self) -> usize {
- self.table.diagnostic_count_hashes()
- }
}
impl<K, V, S> PartialEq for HashMap<K, V, S>
@@ -1343,12 +1326,6 @@ impl<'a, K: Debug, V: Debug> fmt::Debug for Iter<'a, K, V> {
}
}
-impl<'a, K: 'a, V: 'a> Iter<'a, K, V> {
- pub fn next_with_hash(&mut self) -> Option<(usize, &'a K, &'a V)> {
- self.inner.next_with_hash()
- }
-}
-
/// A mutable iterator over the entries of a `HashMap`.
///
/// This `struct` is created by the [`iter_mut`] method on [`HashMap`]. See its
diff --git a/components/hashglobe/src/lib.rs b/components/hashglobe/src/lib.rs
index 254cb2b943d..83012473b9e 100644
--- a/components/hashglobe/src/lib.rs
+++ b/components/hashglobe/src/lib.rs
@@ -9,7 +9,6 @@
// except according to those terms.
pub mod alloc;
-pub mod diagnostic;
pub mod hash_map;
pub mod hash_set;
mod shim;
diff --git a/components/hashglobe/src/table.rs b/components/hashglobe/src/table.rs
index 7f3f251f010..45dcb2673fa 100644
--- a/components/hashglobe/src/table.rs
+++ b/components/hashglobe/src/table.rs
@@ -43,7 +43,7 @@ struct TaggedHashUintPtr(Unique<HashUint>);
impl TaggedHashUintPtr {
#[inline]
unsafe fn new(ptr: *mut HashUint) -> Self {
- assert!(ptr as usize & 1 == 0 || ptr as usize == EMPTY as usize);
+ debug_assert!(ptr as usize & 1 == 0 || ptr as usize == EMPTY as usize);
TaggedHashUintPtr(Unique::new_unchecked(ptr))
}
@@ -117,7 +117,6 @@ pub struct RawTable<K, V> {
capacity_mask: usize,
size: usize,
hashes: TaggedHashUintPtr,
- bytes_allocated: usize,
// Because K/V do not appear directly in any of the types in the struct,
// inform rustc that in fact instances of K and V are reachable from here.
@@ -183,7 +182,7 @@ pub struct GapThenFull<K, V, M> {
/// A hash that is not zero, since we use a hash of zero to represent empty
/// buckets.
-#[derive(PartialEq, Copy, Clone, Debug)]
+#[derive(PartialEq, Copy, Clone)]
pub struct SafeHash {
hash: HashUint,
}
@@ -246,23 +245,6 @@ impl<K, V> RawBucket<K, V> {
unsafe fn hash_pair(&self) -> (*mut HashUint, *mut (K, V)) {
(self.hash(), self.pair())
}
-
- fn assert_bounds(&self, bytes_allocated: usize, size: Option<usize>) {
- let base = self.hash_start as *mut u8;
- let (h, p) = unsafe { self.hash_pair() };
- assert!((h as *mut u8) < (p as *mut u8), "HashMap Corruption - hash offset not below pair offset");
- let end = unsafe { p.offset(1) } as *mut u8;
- assert!(end > base, "HashMap Corruption - end={:?}, base={:?}, idx={}, alloc={}, size={:?}", end, base, self.idx, bytes_allocated, size);
- assert!(
- end <= unsafe { base.offset(bytes_allocated as isize) },
- "HashMap Corruption - end={:?}, base={:?}, idx={}, alloc={}, size={:?}",
- end,
- base,
- self.idx,
- bytes_allocated,
- size,
- );
- }
}
// Buckets hold references to the table.
@@ -366,7 +348,8 @@ impl<K, V, M: Deref<Target = RawTable<K, V>>> Bucket<K, V, M> {
pub fn at_index(table: M, ib_index: usize) -> Bucket<K, V, M> {
// if capacity is 0, then the RawBucket will be populated with bogus pointers.
// This is an uncommon case though, so avoid it in release builds.
- assert!(table.capacity() > 0, "HashMap Corruption - Table should have capacity at this point");
+ debug_assert!(table.capacity() > 0,
+ "Table should have capacity at this point");
let ib_index = ib_index & table.capacity_mask;
Bucket {
raw: table.raw_bucket_at(ib_index),
@@ -439,13 +422,11 @@ impl<K, V, M: Deref<Target = RawTable<K, V>>> Bucket<K, V, M> {
/// Modifies the bucket in place to make it point to the next slot.
pub fn next(&mut self) {
self.raw.idx = self.raw.idx.wrapping_add(1) & self.table.capacity_mask;
- self.raw.assert_bounds(self.table.bytes_allocated, None);
}
/// Modifies the bucket in place to make it point to the previous slot.
pub fn prev(&mut self) {
self.raw.idx = self.raw.idx.wrapping_sub(1) & self.table.capacity_mask;
- self.raw.assert_bounds(self.table.bytes_allocated, None);
}
}
@@ -568,7 +549,7 @@ impl<'t, K, V> FullBucket<K, V, &'t mut RawTable<K, V>> {
/// This works similarly to `put`, building an `EmptyBucket` out of the
/// taken bucket.
pub fn take(self) -> (EmptyBucket<K, V, &'t mut RawTable<K, V>>, K, V) {
- self.table.size = self.table.size.checked_sub(1).unwrap();
+ self.table.size -= 1;
unsafe {
*self.raw.hash() = EMPTY_BUCKET;
@@ -683,7 +664,7 @@ impl<K, V, M> GapThenFull<K, V, M>
/// Panics if `target_alignment` is not a power of two.
#[inline]
fn round_up_to_next(unrounded: usize, target_alignment: usize) -> usize {
- assert!(target_alignment.is_power_of_two(), "HashMap Corruption - alignment not power of two");
+ assert!(target_alignment.is_power_of_two());
(unrounded + target_alignment - 1) & !(target_alignment - 1)
}
@@ -753,11 +734,9 @@ impl<K, V> RawTable<K, V> {
size: 0,
capacity_mask: capacity.wrapping_sub(1),
hashes: TaggedHashUintPtr::new(EMPTY as *mut HashUint),
- bytes_allocated: 0,
marker: marker::PhantomData,
});
}
- assert!(capacity.is_power_of_two(), "HashMap Corruption - capacity not power of two");
// No need for `checked_mul` before a more restrictive check performed
// later in this method.
@@ -798,72 +777,40 @@ impl<K, V> RawTable<K, V> {
// FORK NOTE: Uses alloc shim instead of Heap.alloc
- let buffer: *mut u8 = alloc(size, alignment);
+ let buffer = alloc(size, alignment);
if buffer.is_null() {
return Err(FailedAllocationError { reason: "out of memory when allocating RawTable" });
}
- // FORK NOTE: poison the entire buffer rather than leaving it uninitialized.
- ptr::write_bytes(buffer, 0xe7, size);
-
let hashes = buffer.offset(hash_offset as isize) as *mut HashUint;
- assert!(hashes as *mut u8 == buffer, "HashMap Corruption - Nonzero hash_offset");
Ok(RawTable {
capacity_mask: capacity.wrapping_sub(1),
size: 0,
hashes: TaggedHashUintPtr::new(hashes),
- bytes_allocated: size,
marker: marker::PhantomData,
})
}
fn raw_bucket_at(&self, index: usize) -> RawBucket<K, V> {
- self.verify();
let hashes_size = self.capacity() * size_of::<HashUint>();
let pairs_size = self.capacity() * size_of::<(K, V)>();
let (pairs_offset, _, oflo) =
calculate_offsets(hashes_size, pairs_size, align_of::<(K, V)>());
- assert!(!oflo, "HashMap Corruption - capacity overflow");
- assert!(pairs_offset as isize > 0, "HashMap Corruption - pairs offset={}", pairs_offset);
- assert!(index as isize >= 0, "HashMap Corruption - index={}", index);
- assert!(index < self.capacity(), "HashMap Corruption - index={}", index);
+ debug_assert!(!oflo, "capacity overflow");
let buffer = self.hashes.ptr() as *mut u8;
- let bucket = unsafe {
+ unsafe {
RawBucket {
hash_start: buffer as *mut HashUint,
pair_start: buffer.offset(pairs_offset as isize) as *const (K, V),
idx: index,
_marker: marker::PhantomData,
}
- };
-
- bucket.assert_bounds(self.bytes_allocated, Some(self.size));
- bucket
- }
-
- /// Returns a raw pointer to the table's buffer.
- #[inline]
- pub fn raw_buffer(&self) -> *const u8 {
- self.hashes.ptr() as *const u8
- }
-
- /// Verify that the table metadata is internally consistent.
- #[inline]
- pub fn verify(&self) {
- assert!(
- self.capacity() == 0 || self.capacity().is_power_of_two(),
- "HashMap Corruption: mask={}, sz={}, alloc={}", self.capacity_mask, self.size, self.bytes_allocated,
- );
- assert_eq!(
- self.capacity() * (size_of::<usize>() + size_of::<(K, V)>()),
- self.bytes_allocated,
- "HashMap Corruption: mask={}, sz={}, alloc={}", self.capacity_mask, self.size, self.bytes_allocated,
- );
+ }
}
/// Creates a new raw table from a given capacity. All buckets are
@@ -889,17 +836,12 @@ impl<K, V> RawTable<K, V> {
fn raw_buckets(&self) -> RawBuckets<K, V> {
RawBuckets {
- raw: if self.capacity() == 0 { None } else { Some(self.raw_bucket_at(0)) },
+ raw: self.raw_bucket_at(0),
elems_left: self.size,
- bytes_allocated: self.bytes_allocated,
marker: marker::PhantomData,
}
}
- pub fn diagnostic_count_hashes(&self) -> usize {
- (0..self.capacity()).filter(|&i| unsafe { *self.raw_bucket_at(i).hash() != EMPTY_BUCKET }).count()
- }
-
pub fn iter(&self) -> Iter<K, V> {
Iter {
iter: self.raw_buckets(),
@@ -914,13 +856,12 @@ impl<K, V> RawTable<K, V> {
}
pub fn into_iter(self) -> IntoIter<K, V> {
- let RawBuckets { raw, elems_left, bytes_allocated, .. } = self.raw_buckets();
+ let RawBuckets { raw, elems_left, .. } = self.raw_buckets();
// Replace the marker regardless of lifetime bounds on parameters.
IntoIter {
iter: RawBuckets {
raw,
elems_left,
- bytes_allocated,
marker: marker::PhantomData,
},
table: self,
@@ -928,13 +869,12 @@ impl<K, V> RawTable<K, V> {
}
pub fn drain(&mut self) -> Drain<K, V> {
- let RawBuckets { raw, elems_left, bytes_allocated, .. } = self.raw_buckets();
+ let RawBuckets { raw, elems_left, .. } = self.raw_buckets();
// Replace the marker regardless of lifetime bounds on parameters.
Drain {
iter: RawBuckets {
raw,
elems_left,
- bytes_allocated,
marker: marker::PhantomData,
},
table: Shared::from(self),
@@ -946,21 +886,17 @@ impl<K, V> RawTable<K, V> {
/// state and should only be used for dropping the table's remaining
/// entries. It's used in the implementation of Drop.
unsafe fn rev_drop_buckets(&mut self) {
+ // initialize the raw bucket past the end of the table
+ let mut raw = self.raw_bucket_at(self.capacity());
let mut elems_left = self.size;
- if elems_left == 0 {
- return;
- }
- let mut raw = self.raw_bucket_at(self.capacity() - 1);
- loop {
+
+ while elems_left != 0 {
+ raw.idx -= 1;
+
if *raw.hash() != EMPTY_BUCKET {
+ elems_left -= 1;
ptr::drop_in_place(raw.pair());
- elems_left = elems_left.checked_sub(1).unwrap();
- if elems_left == 0 {
- return;
- }
}
- raw.idx = raw.idx.checked_sub(1).unwrap();
- raw.assert_bounds(self.bytes_allocated, Some(self.size));
}
}
@@ -978,11 +914,8 @@ impl<K, V> RawTable<K, V> {
/// A raw iterator. The basis for some other iterators in this module. Although
/// this interface is safe, it's not used outside this module.
struct RawBuckets<'a, K, V> {
- // We use an Option here to avoid ever constructing a RawBucket for
- // invalid memory.
- raw: Option<RawBucket<K, V>>,
+ raw: RawBucket<K, V>,
elems_left: usize,
- bytes_allocated: usize,
// Strictly speaking, this should be &'a (K,V), but that would
// require that K:'a, and we often use RawBuckets<'static...> for
@@ -998,7 +931,6 @@ impl<'a, K, V> Clone for RawBuckets<'a, K, V> {
RawBuckets {
raw: self.raw,
elems_left: self.elems_left,
- bytes_allocated: self.bytes_allocated,
marker: marker::PhantomData,
}
}
@@ -1015,17 +947,12 @@ impl<'a, K, V> Iterator for RawBuckets<'a, K, V> {
loop {
unsafe {
- let item = self.raw.unwrap();
+ let item = self.raw;
+ self.raw.idx += 1;
if *item.hash() != EMPTY_BUCKET {
- self.elems_left = self.elems_left.checked_sub(1).unwrap();
- if self.elems_left != 0 {
- self.raw.as_mut().unwrap().idx += 1;
- self.raw.as_ref().unwrap().assert_bounds(self.bytes_allocated, None);
- }
+ self.elems_left -= 1;
return Some(item);
}
- self.raw.as_mut().unwrap().idx += 1;
- self.raw.as_ref().unwrap().assert_bounds(self.bytes_allocated, None);
}
}
}
@@ -1134,15 +1061,6 @@ impl<'a, K, V> ExactSizeIterator for Iter<'a, K, V> {
}
}
-impl<'a, K, V> Iter<'a, K, V> {
- pub fn next_with_hash(&mut self) -> Option<(usize, &'a K, &'a V)> {
- self.iter.next().map(|raw| unsafe {
- let (hash_ptr, pair_ptr) = raw.hash_pair();
- (*hash_ptr, &(*pair_ptr).0, &(*pair_ptr).1)
- })
- }
-}
-
impl<'a, K, V> Iterator for IterMut<'a, K, V> {
type Item = (&'a K, &'a mut V);
@@ -1169,7 +1087,7 @@ impl<K, V> Iterator for IntoIter<K, V> {
fn next(&mut self) -> Option<(SafeHash, K, V)> {
self.iter.next().map(|raw| {
- self.table.size = self.table.size.checked_sub(1).unwrap();
+ self.table.size -= 1;
unsafe {
let (k, v) = ptr::read(raw.pair());
(SafeHash { hash: *raw.hash() }, k, v)
@@ -1195,7 +1113,7 @@ impl<'a, K, V> Iterator for Drain<'a, K, V> {
fn next(&mut self) -> Option<(SafeHash, K, V)> {
self.iter.next().map(|raw| {
unsafe {
- self.table.as_mut().size = self.table.as_mut().size.checked_sub(1).unwrap();
+ self.table.as_mut().size -= 1;
let (k, v) = ptr::read(raw.pair());
(SafeHash { hash: ptr::replace(&mut *raw.hash(), EMPTY_BUCKET) }, k, v)
}
@@ -1224,28 +1142,18 @@ impl<K: Clone, V: Clone> Clone for RawTable<K, V> {
unsafe {
let cap = self.capacity();
let mut new_ht = RawTable::new_uninitialized(cap);
- if cap == 0 {
- return new_ht;
- }
let mut new_buckets = new_ht.raw_bucket_at(0);
let mut buckets = self.raw_bucket_at(0);
- loop {
+ while buckets.idx < cap {
*new_buckets.hash() = *buckets.hash();
if *new_buckets.hash() != EMPTY_BUCKET {
let pair_ptr = buckets.pair();
let kv = ((*pair_ptr).0.clone(), (*pair_ptr).1.clone());
ptr::write(new_buckets.pair(), kv);
}
-
- if buckets.idx == cap - 1 {
- break;
- }
-
buckets.idx += 1;
- buckets.assert_bounds(self.bytes_allocated, None);
new_buckets.idx += 1;
- new_buckets.assert_bounds(new_ht.bytes_allocated, None);
}
new_ht.size = self.size();
@@ -1284,7 +1192,7 @@ impl<K, V> Drop for RawTable<K, V> {
pairs_size,
align_of::<(K, V)>());
- assert!(!oflo, "HashMap Corruption - should be impossible");
+ debug_assert!(!oflo, "should be impossible");
unsafe {
dealloc(self.hashes.ptr() as *mut u8, align);
diff --git a/components/malloc_size_of/lib.rs b/components/malloc_size_of/lib.rs
index 399f1180637..babb393cc9a 100644
--- a/components/malloc_size_of/lib.rs
+++ b/components/malloc_size_of/lib.rs
@@ -499,25 +499,6 @@ impl<K, V, S> MallocSizeOf for hashglobe::hash_map::HashMap<K, V, S>
}
}
-impl<K, V, S> MallocShallowSizeOf for hashglobe::diagnostic::DiagnosticHashMap<K, V, S>
- where K: Eq + Hash,
- S: BuildHasher
-{
- fn shallow_size_of(&self, ops: &mut MallocSizeOfOps) -> usize {
- self.inner().shallow_size_of(ops)
- }
-}
-
-impl<K, V, S> MallocSizeOf for hashglobe::diagnostic::DiagnosticHashMap<K, V, S>
- where K: Eq + Hash + MallocSizeOf,
- V: MallocSizeOf,
- S: BuildHasher,
-{
- fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize {
- self.inner().size_of(ops)
- }
-}
-
impl<K, V, S> MallocShallowSizeOf for hashglobe::fake::HashMap<K, V, S>
where K: Eq + Hash,
S: BuildHasher,
diff --git a/components/style/context.rs b/components/style/context.rs
index a7fe03ad70c..5ed3f06c6bc 100644
--- a/components/style/context.rs
+++ b/components/style/context.rs
@@ -322,6 +322,8 @@ pub struct TraversalStatistics {
pub selectors: u32,
/// The number of revalidation selectors.
pub revalidation_selectors: u32,
+ /// The number of state/attr dependencies in the dependency set.
+ pub dependency_selectors: u32,
/// The number of declarations in the stylist.
pub declarations: u32,
/// The number of times the stylist was rebuilt.
@@ -342,6 +344,7 @@ impl<'a> ops::Add for &'a TraversalStatistics {
"traversal_time_ms should be set at the end by the caller");
debug_assert!(self.selectors == 0, "set at the end");
debug_assert!(self.revalidation_selectors == 0, "set at the end");
+ debug_assert!(self.dependency_selectors == 0, "set at the end");
debug_assert!(self.declarations == 0, "set at the end");
debug_assert!(self.stylist_rebuilds == 0, "set at the end");
TraversalStatistics {
@@ -352,6 +355,7 @@ impl<'a> ops::Add for &'a TraversalStatistics {
styles_reused: self.styles_reused + other.styles_reused,
selectors: 0,
revalidation_selectors: 0,
+ dependency_selectors: 0,
declarations: 0,
stylist_rebuilds: 0,
traversal_time_ms: 0.0,
@@ -379,6 +383,7 @@ impl fmt::Display for TraversalStatistics {
writeln!(f, "[PERF],styles_reused,{}", self.styles_reused)?;
writeln!(f, "[PERF],selectors,{}", self.selectors)?;
writeln!(f, "[PERF],revalidation_selectors,{}", self.revalidation_selectors)?;
+ writeln!(f, "[PERF],dependency_selectors,{}", self.dependency_selectors)?;
writeln!(f, "[PERF],declarations,{}", self.declarations)?;
writeln!(f, "[PERF],stylist_rebuilds,{}", self.stylist_rebuilds)?;
writeln!(f, "[PERF],traversal_time_ms,{}", self.traversal_time_ms)?;
@@ -400,6 +405,7 @@ impl TraversalStatistics {
self.traversal_time_ms = (time::precise_time_s() - start) * 1000.0;
self.selectors = stylist.num_selectors() as u32;
self.revalidation_selectors = stylist.num_revalidation_selectors() as u32;
+ self.dependency_selectors = stylist.num_invalidations() as u32;
self.declarations = stylist.num_declarations() as u32;
self.stylist_rebuilds = stylist.num_rebuilds() as u32;
}
diff --git a/components/style/custom_properties.rs b/components/style/custom_properties.rs
index 90446ec02e7..05967a8f922 100644
--- a/components/style/custom_properties.rs
+++ b/components/style/custom_properties.rs
@@ -10,7 +10,7 @@ use Atom;
use cssparser::{Delimiter, Parser, ParserInput, SourcePosition, Token, TokenSerializationType};
use precomputed_hash::PrecomputedHash;
use properties::{CSSWideKeyword, DeclaredValue};
-use selector_map::{PrecomputedHashSet, PrecomputedHashMap, PrecomputedDiagnosticHashMap};
+use selector_map::{PrecomputedHashSet, PrecomputedHashMap};
use selectors::parser::SelectorParseErrorKind;
use servo_arc::Arc;
use smallvec::SmallVec;
@@ -88,7 +88,7 @@ where
/// Key index.
index: Vec<K>,
/// Key-value map.
- values: PrecomputedDiagnosticHashMap<K, V>,
+ values: PrecomputedHashMap<K, V>,
}
impl<K, V> OrderedMap<K, V>
@@ -99,7 +99,7 @@ where
pub fn new() -> Self {
OrderedMap {
index: Vec::new(),
- values: PrecomputedDiagnosticHashMap::default(),
+ values: PrecomputedHashMap::default(),
}
}
@@ -108,9 +108,7 @@ where
if !self.values.contains_key(&key) {
self.index.push(key.clone());
}
- self.values.begin_mutation();
- self.values.try_insert(key, value).unwrap();
- self.values.end_mutation();
+ self.values.insert(key, value);
}
/// Get a value given its key.
@@ -160,10 +158,7 @@ where
None => return None,
};
self.index.remove(index);
- self.values.begin_mutation();
- let result = self.values.remove(key);
- self.values.end_mutation();
- result
+ self.values.remove(key)
}
fn remove_set<S>(&mut self, set: &::hash::HashSet<K, S>)
@@ -173,13 +168,7 @@ where
return;
}
self.index.retain(|key| !set.contains(key));
- self.values.begin_mutation();
- // XXX It may be better to use retain when we back to use a
- // normal hashmap rather than DiagnosticHashMap.
- for key in set.iter() {
- self.values.remove(key);
- }
- self.values.end_mutation();
+ self.values.retain(|key, _| !set.contains(key));
debug_assert_eq!(self.values.len(), self.index.len());
}
}
@@ -211,7 +200,7 @@ where
};
self.pos += 1;
- let value = &self.inner.values.get(key).unwrap();
+ let value = &self.inner.values[key];
Some((key, value))
}
diff --git a/components/style/hash.rs b/components/style/hash.rs
index c99ca3e9e65..305357a85b2 100644
--- a/components/style/hash.rs
+++ b/components/style/hash.rs
@@ -13,15 +13,10 @@ use fnv;
pub use hashglobe::hash_map::HashMap;
#[cfg(feature = "gecko")]
pub use hashglobe::hash_set::HashSet;
-#[cfg(feature = "gecko")]
-pub use hashglobe::diagnostic::DiagnosticHashMap;
-#[cfg(feature = "servo")]
-pub use hashglobe::fake::{HashMap, HashSet};
-/// Alias to use regular HashMaps everywhere in Servo.
#[cfg(feature = "servo")]
-pub type DiagnosticHashMap<K, V, S> = HashMap<K, V, S>;
+pub use hashglobe::fake::{HashMap, HashSet};
/// Appropriate reexports of hash_map types
pub mod map {
diff --git a/components/style/invalidation/element/invalidation_map.rs b/components/style/invalidation/element/invalidation_map.rs
index 1ee1358a91a..3f1e3480c15 100644
--- a/components/style/invalidation/element/invalidation_map.rs
+++ b/components/style/invalidation/element/invalidation_map.rs
@@ -172,6 +172,18 @@ impl InvalidationMap {
}
}
+ /// Returns the number of dependencies stored in the invalidation map.
+ pub fn len(&self) -> usize {
+ self.state_affecting_selectors.len() +
+ self.other_attribute_affecting_selectors.len() +
+ self.id_to_selector.iter().fold(0, |accum, (_, ref v)| {
+ accum + v.len()
+ }) +
+ self.class_to_selector.iter().fold(0, |accum, (_, ref v)| {
+ accum + v.len()
+ })
+ }
+
/// Adds a selector to this `InvalidationMap`. Returns Err(..) to
/// signify OOM.
pub fn note_selector(
@@ -234,7 +246,8 @@ impl InvalidationMap {
for class in compound_visitor.classes {
self.class_to_selector
- .try_get_or_insert_with(class, quirks_mode, SmallVec::new)?
+ .entry(class, quirks_mode)
+ .or_insert_with(SmallVec::new)
.try_push(Dependency {
selector: selector.clone(),
selector_offset: sequence_start,
@@ -243,7 +256,8 @@ impl InvalidationMap {
for id in compound_visitor.ids {
self.id_to_selector
- .try_get_or_insert_with(id, quirks_mode, SmallVec::new)?
+ .entry(id, quirks_mode)
+ .or_insert_with(SmallVec::new)
.try_push(Dependency {
selector: selector.clone(),
selector_offset: sequence_start,
@@ -279,22 +293,6 @@ impl InvalidationMap {
Ok(())
}
-
- /// Allows mutation of this InvalidationMap.
- pub fn begin_mutation(&mut self) {
- self.class_to_selector.begin_mutation();
- self.id_to_selector.begin_mutation();
- self.state_affecting_selectors.begin_mutation();
- self.other_attribute_affecting_selectors.begin_mutation();
- }
-
- /// Disallows mutation of this InvalidationMap.
- pub fn end_mutation(&mut self) {
- self.class_to_selector.end_mutation();
- self.id_to_selector.end_mutation();
- self.state_affecting_selectors.end_mutation();
- self.other_attribute_affecting_selectors.end_mutation();
- }
}
/// A struct that collects invalidations for a given compound selector.
diff --git a/components/style/selector_map.rs b/components/style/selector_map.rs
index 13b16fd17d7..c86053e8186 100644
--- a/components/style/selector_map.rs
+++ b/components/style/selector_map.rs
@@ -10,7 +10,8 @@ use applicable_declarations::ApplicableDeclarationBlock;
use context::QuirksMode;
use dom::TElement;
use fallible::FallibleVec;
-use hash::{HashMap, HashSet, DiagnosticHashMap};
+use hash::{HashMap, HashSet};
+use hash::map as hash_map;
use hashglobe::FailedAllocationError;
use precomputed_hash::PrecomputedHash;
use rule_tree::CascadeLevel;
@@ -36,9 +37,6 @@ 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 PrecomputedDiagnosticHashMap<K, V> = DiagnosticHashMap<K, V, BuildHasherDefault<PrecomputedHasher>>;
-
/// A simple alias for a hashset using PrecomputedHasher.
pub type PrecomputedHashSet<K> = HashSet<K, BuildHasherDefault<PrecomputedHasher>>;
@@ -101,7 +99,7 @@ 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: PrecomputedDiagnosticHashMap<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.
@@ -117,7 +115,7 @@ impl<T: 'static> SelectorMap<T> {
SelectorMap {
id_hash: MaybeCaseInsensitiveHashMap::new(),
class_hash: MaybeCaseInsensitiveHashMap::new(),
- local_name_hash: DiagnosticHashMap::default(),
+ local_name_hash: HashMap::default(),
other: SmallVec::new(),
count: 0,
}
@@ -141,20 +139,6 @@ impl<T: 'static> SelectorMap<T> {
pub fn len(&self) -> usize {
self.count
}
-
- /// Allows mutation of this SelectorMap.
- pub fn begin_mutation(&mut self) {
- self.id_hash.begin_mutation();
- self.class_hash.begin_mutation();
- self.local_name_hash.begin_mutation();
- }
-
- /// Disallows mutation of this SelectorMap.
- pub fn end_mutation(&mut self) {
- self.id_hash.end_mutation();
- self.class_hash.end_mutation();
- self.local_name_hash.end_mutation();
- }
}
impl SelectorMap<Rule> {
@@ -264,10 +248,12 @@ impl<T: SelectorMapEntry> SelectorMap<T> {
let vector = match find_bucket(entry.selector()) {
Bucket::ID(id) => {
- self.id_hash.try_get_or_insert_with(id.clone(), quirks_mode, SmallVec::new)?
+ self.id_hash.try_entry(id.clone(), quirks_mode)?
+ .or_insert_with(SmallVec::new)
}
Bucket::Class(class) => {
- self.class_hash.try_get_or_insert_with(class.clone(), quirks_mode, SmallVec::new)?
+ self.class_hash.try_entry(class.clone(), quirks_mode)?
+ .or_insert_with(SmallVec::new)
}
Bucket::LocalName { name, lower_name } => {
// If the local name in the selector isn't lowercase, insert it
@@ -283,10 +269,12 @@ impl<T: SelectorMapEntry> SelectorMap<T> {
// subsequent selector matching work will filter them out.
if name != lower_name {
self.local_name_hash
- .try_get_or_insert_with(lower_name.clone(), SmallVec::new)?
+ .try_entry(lower_name.clone())?
+ .or_insert_with(SmallVec::new)
.try_push(entry.clone())?;
}
- self.local_name_hash.try_get_or_insert_with(name.clone(), SmallVec::new)?
+ self.local_name_hash.try_entry(name.clone())?
+ .or_insert_with(SmallVec::new)
}
Bucket::Universal => {
&mut self.other
@@ -473,7 +461,7 @@ fn find_bucket<'a>(mut iter: SelectorIter<'a, SelectorImpl>) -> Bucket<'a> {
/// Wrapper for PrecomputedHashMap that does ASCII-case-insensitive lookup in quirks mode.
#[derive(Debug, MallocSizeOf)]
-pub struct MaybeCaseInsensitiveHashMap<K: PrecomputedHash + Hash + Eq, V: 'static>(PrecomputedDiagnosticHashMap<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,
@@ -481,20 +469,32 @@ pub struct MaybeCaseInsensitiveHashMap<K: PrecomputedHash + Hash + Eq, V: 'stati
impl<V: 'static> MaybeCaseInsensitiveHashMap<Atom, V> {
/// Empty map
pub fn new() -> Self {
- MaybeCaseInsensitiveHashMap(PrecomputedDiagnosticHashMap::default())
+ MaybeCaseInsensitiveHashMap(PrecomputedHashMap::default())
}
- /// DiagnosticHashMap::try_get_or_insert_with
- pub fn try_get_or_insert_with<F: FnOnce() -> V>(
+ /// HashMap::entry
+ pub fn entry(&mut self, mut key: Atom, quirks_mode: QuirksMode) -> hash_map::Entry<Atom, V> {
+ if quirks_mode == QuirksMode::Quirks {
+ key = key.to_ascii_lowercase()
+ }
+ self.0.entry(key)
+ }
+
+ /// HashMap::try_entry
+ pub fn try_entry(
&mut self,
mut key: Atom,
- quirks_mode: QuirksMode,
- default: F,
- ) -> Result<&mut V, FailedAllocationError> {
+ quirks_mode: QuirksMode
+ ) -> Result<hash_map::Entry<Atom, V>, FailedAllocationError> {
if quirks_mode == QuirksMode::Quirks {
key = key.to_ascii_lowercase()
}
- self.0.try_get_or_insert_with(key, default)
+ self.0.try_entry(key)
+ }
+
+ /// HashMap::iter
+ pub fn iter(&self) -> hash_map::Iter<Atom, V> {
+ self.0.iter()
}
/// HashMap::clear
@@ -510,14 +510,4 @@ impl<V: 'static> MaybeCaseInsensitiveHashMap<Atom, V> {
self.0.get(key)
}
}
-
- /// DiagnosticHashMap::begin_mutation
- pub fn begin_mutation(&mut self) {
- self.0.begin_mutation();
- }
-
- /// DiagnosticHashMap::end_mutation
- pub fn end_mutation(&mut self) {
- self.0.end_mutation();
- }
}
diff --git a/components/style/selector_parser.rs b/components/style/selector_parser.rs
index 18b854894f6..62d88f2bf3b 100644
--- a/components/style/selector_parser.rs
+++ b/components/style/selector_parser.rs
@@ -145,15 +145,6 @@ impl<T> PerPseudoElementMap<T> {
*self = Self::default();
}
- /// Invokes a callback on each non-None entry.
- pub fn for_each<F: FnMut(&mut T)>(&mut self, mut f: F) {
- for entry in self.entries.iter_mut() {
- if entry.is_some() {
- f(entry.as_mut().unwrap());
- }
- }
- }
-
/// Set an entry value.
///
/// Returns an error if the element is not a simple pseudo.
diff --git a/components/style/stylist.rs b/components/style/stylist.rs
index 2bf74a6f765..f819d7f7da1 100644
--- a/components/style/stylist.rs
+++ b/components/style/stylist.rs
@@ -479,6 +479,12 @@ impl Stylist {
.map(|(d, _)| d.selectors_for_cache_revalidation.len()).sum()
}
+ /// Returns the number of entries in invalidation maps.
+ pub fn num_invalidations(&self) -> usize {
+ self.cascade_data.iter_origins()
+ .map(|(d, _)| d.invalidation_map.len()).sum()
+ }
+
/// Invokes `f` with the `InvalidationMap` for each origin.
///
/// NOTE(heycam) This might be better as an `iter_invalidation_maps`, once
@@ -1906,32 +1912,6 @@ impl CascadeData {
}
}
- #[cfg(feature = "gecko")]
- fn begin_mutation(&mut self, rebuild_kind: &SheetRebuildKind) {
- self.element_map.begin_mutation();
- self.pseudos_map.for_each(|m| m.begin_mutation());
- if rebuild_kind.should_rebuild_invalidation() {
- self.invalidation_map.begin_mutation();
- self.selectors_for_cache_revalidation.begin_mutation();
- }
- }
-
- #[cfg(feature = "servo")]
- fn begin_mutation(&mut self, _: &SheetRebuildKind) {}
-
- #[cfg(feature = "gecko")]
- fn end_mutation(&mut self, rebuild_kind: &SheetRebuildKind) {
- self.element_map.end_mutation();
- self.pseudos_map.for_each(|m| m.end_mutation());
- if rebuild_kind.should_rebuild_invalidation() {
- self.invalidation_map.end_mutation();
- self.selectors_for_cache_revalidation.end_mutation();
- }
- }
-
- #[cfg(feature = "servo")]
- fn end_mutation(&mut self, _: &SheetRebuildKind) {}
-
/// Collects all the applicable media query results into `results`.
///
/// This duplicates part of the logic in `add_stylesheet`, which is
@@ -1995,7 +1975,6 @@ impl CascadeData {
self.effective_media_query_results.saw_effective(stylesheet);
}
- self.begin_mutation(&rebuild_kind);
for rule in stylesheet.effective_rules(device, guard) {
match *rule {
CssRule::Style(ref locked) => {
@@ -2026,11 +2005,7 @@ impl CascadeData {
None => &mut self.element_map,
Some(pseudo) => {
self.pseudos_map
- .get_or_insert_with(&pseudo.canonical(), || {
- let mut map = Box::new(SelectorMap::new());
- map.begin_mutation();
- map
- })
+ .get_or_insert_with(&pseudo.canonical(), || Box::new(SelectorMap::new()))
}
};
@@ -2125,7 +2100,6 @@ impl CascadeData {
_ => {}
}
}
- self.end_mutation(&rebuild_kind);
Ok(())
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-28 23:21:01 +0000