LCOV - code coverage report
Current view: top level - src/objects - descriptor-array-inl.h (source / functions) Hit Total Coverage
Test: app.info Lines: 74 74 100.0 %
Date: 2019-03-21 Functions: 19 19 100.0 %

          Line data    Source code
       1             : // Copyright 2018 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #ifndef V8_OBJECTS_DESCRIPTOR_ARRAY_INL_H_
       6             : #define V8_OBJECTS_DESCRIPTOR_ARRAY_INL_H_
       7             : 
       8             : #include "src/objects/descriptor-array.h"
       9             : 
      10             : #include "src/field-type.h"
      11             : #include "src/heap/heap-write-barrier.h"
      12             : #include "src/heap/heap.h"
      13             : #include "src/isolate.h"
      14             : #include "src/lookup-cache-inl.h"
      15             : #include "src/maybe-handles-inl.h"
      16             : #include "src/objects/heap-object-inl.h"
      17             : #include "src/objects/maybe-object.h"
      18             : #include "src/objects/struct-inl.h"
      19             : #include "src/property.h"
      20             : 
      21             : // Has to be the last include (doesn't have include guards):
      22             : #include "src/objects/object-macros.h"
      23             : 
      24             : namespace v8 {
      25             : namespace internal {
      26             : 
      27         112 : OBJECT_CONSTRUCTORS_IMPL(DescriptorArray, HeapObject)
      28         168 : OBJECT_CONSTRUCTORS_IMPL(EnumCache, Tuple2)
      29             : 
      30         112 : CAST_ACCESSOR(DescriptorArray)
      31         168 : CAST_ACCESSOR(EnumCache)
      32             : 
      33      232769 : ACCESSORS(EnumCache, keys, FixedArray, kKeysOffset)
      34        4244 : ACCESSORS(EnumCache, indices, FixedArray, kIndicesOffset)
      35             : 
      36   108948542 : ACCESSORS(DescriptorArray, enum_cache, EnumCache, kEnumCacheOffset)
      37   122573255 : RELAXED_INT16_ACCESSORS(DescriptorArray, number_of_all_descriptors,
      38             :                         kNumberOfAllDescriptorsOffset)
      39   190208023 : RELAXED_INT16_ACCESSORS(DescriptorArray, number_of_descriptors,
      40             :                         kNumberOfDescriptorsOffset)
      41    64650119 : RELAXED_INT16_ACCESSORS(DescriptorArray, raw_number_of_marked_descriptors,
      42             :                         kRawNumberOfMarkedDescriptorsOffset)
      43    18898368 : RELAXED_INT16_ACCESSORS(DescriptorArray, filler16bits, kFiller16BitsOffset)
      44             : 
      45     8509180 : inline int16_t DescriptorArray::number_of_slack_descriptors() const {
      46     8509180 :   return number_of_all_descriptors() - number_of_descriptors();
      47             : }
      48             : 
      49             : inline int DescriptorArray::number_of_entries() const {
      50    16041319 :   return number_of_descriptors();
      51             : }
      52             : 
      53             : inline int16_t DescriptorArray::CompareAndSwapRawNumberOfMarkedDescriptors(
      54             :     int16_t expected, int16_t value) {
      55    23208484 :   return base::Relaxed_CompareAndSwap(
      56             :       reinterpret_cast<base::Atomic16*>(
      57    23208484 :           FIELD_ADDR(*this, kRawNumberOfMarkedDescriptorsOffset)),
      58             :       expected, value);
      59             : }
      60             : 
      61     2310315 : void DescriptorArray::CopyEnumCacheFrom(DescriptorArray array) {
      62     2310315 :   set_enum_cache(array->enum_cache());
      63     2310315 : }
      64             : 
      65             : int DescriptorArray::Search(Name name, int valid_descriptors) {
      66             :   DCHECK(name->IsUniqueName());
      67             :   return internal::Search<VALID_ENTRIES>(this, name, valid_descriptors,
      68    43148666 :                                          nullptr);
      69             : }
      70             : 
      71             : int DescriptorArray::Search(Name name, Map map) {
      72             :   DCHECK(name->IsUniqueName());
      73             :   int number_of_own_descriptors = map->NumberOfOwnDescriptors();
      74     2993834 :   if (number_of_own_descriptors == 0) return kNotFound;
      75             :   return Search(name, number_of_own_descriptors);
      76             : }
      77             : 
      78             : int DescriptorArray::SearchWithCache(Isolate* isolate, Name name, Map map) {
      79             :   DCHECK(name->IsUniqueName());
      80             :   int number_of_own_descriptors = map->NumberOfOwnDescriptors();
      81    96439894 :   if (number_of_own_descriptors == 0) return kNotFound;
      82             : 
      83             :   DescriptorLookupCache* cache = isolate->descriptor_lookup_cache();
      84             :   int number = cache->Lookup(map, name);
      85             : 
      86    78425987 :   if (number == DescriptorLookupCache::kAbsent) {
      87             :     number = Search(name, number_of_own_descriptors);
      88             :     cache->Update(map, name, number);
      89             :   }
      90             : 
      91             :   return number;
      92             : }
      93             : 
      94             : ObjectSlot DescriptorArray::GetFirstPointerSlot() {
      95             :   return RawField(DescriptorArray::kPointersStartOffset);
      96             : }
      97             : 
      98      992370 : ObjectSlot DescriptorArray::GetDescriptorSlot(int descriptor) {
      99             :   // Allow descriptor == number_of_all_descriptors() for computing the slot
     100             :   // address that comes after the last descriptor (for iterating).
     101             :   DCHECK_LE(descriptor, number_of_all_descriptors());
     102      992370 :   return RawField(OffsetOfDescriptorAt(descriptor));
     103             : }
     104             : 
     105             : ObjectSlot DescriptorArray::GetKeySlot(int descriptor) {
     106             :   DCHECK_LE(descriptor, number_of_all_descriptors());
     107             :   ObjectSlot slot = GetDescriptorSlot(descriptor) + kEntryKeyIndex;
     108             :   DCHECK((*slot)->IsObject());
     109             :   return slot;
     110             : }
     111             : 
     112  1092264099 : Name DescriptorArray::GetKey(int descriptor_number) const {
     113             :   DCHECK(descriptor_number < number_of_descriptors());
     114             :   return Name::cast(
     115  1092264100 :       get(ToKeyIndex(descriptor_number))->GetHeapObjectAssumeStrong());
     116             : }
     117             : 
     118             : int DescriptorArray::GetSortedKeyIndex(int descriptor_number) {
     119  2950172596 :   return GetDetails(descriptor_number).pointer();
     120             : }
     121             : 
     122   836639881 : Name DescriptorArray::GetSortedKey(int descriptor_number) {
     123   836639710 :   return GetKey(GetSortedKeyIndex(descriptor_number));
     124             : }
     125             : 
     126   851322168 : void DescriptorArray::SetSortedKey(int descriptor_index, int pointer) {
     127   851322168 :   PropertyDetails details = GetDetails(descriptor_index);
     128             :   set(ToDetailsIndex(descriptor_index),
     129   851322150 :       MaybeObject::FromObject(details.set_pointer(pointer).AsSmi()));
     130   851322154 : }
     131             : 
     132             : MaybeObjectSlot DescriptorArray::GetValueSlot(int descriptor) {
     133             :   DCHECK_LT(descriptor, number_of_descriptors());
     134             :   return MaybeObjectSlot(GetDescriptorSlot(descriptor) + kEntryValueIndex);
     135             : }
     136             : 
     137     4208672 : Object DescriptorArray::GetStrongValue(int descriptor_number) {
     138             :   DCHECK(descriptor_number < number_of_descriptors());
     139     4208673 :   return get(ToValueIndex(descriptor_number))->cast<Object>();
     140             : }
     141             : 
     142             : void DescriptorArray::SetValue(int descriptor_index, Object value) {
     143     4063057 :   set(ToValueIndex(descriptor_index), MaybeObject::FromObject(value));
     144             : }
     145             : 
     146   159461804 : MaybeObject DescriptorArray::GetValue(int descriptor_number) {
     147             :   DCHECK_LT(descriptor_number, number_of_descriptors());
     148   159461812 :   return get(ToValueIndex(descriptor_number));
     149             : }
     150             : 
     151  4375773202 : PropertyDetails DescriptorArray::GetDetails(int descriptor_number) {
     152             :   DCHECK(descriptor_number < number_of_descriptors());
     153             :   MaybeObject details = get(ToDetailsIndex(descriptor_number));
     154  4375777661 :   return PropertyDetails(details->ToSmi());
     155             : }
     156             : 
     157             : int DescriptorArray::GetFieldIndex(int descriptor_number) {
     158             :   DCHECK_EQ(GetDetails(descriptor_number).location(), kField);
     159   173752988 :   return GetDetails(descriptor_number).field_index();
     160             : }
     161             : 
     162             : FieldType DescriptorArray::GetFieldType(int descriptor_number) {
     163             :   DCHECK_EQ(GetDetails(descriptor_number).location(), kField);
     164    37398764 :   MaybeObject wrapped_type = GetValue(descriptor_number);
     165    37398764 :   return Map::UnwrapFieldType(wrapped_type);
     166             : }
     167             : 
     168   143072453 : void DescriptorArray::Set(int descriptor_number, Name key, MaybeObject value,
     169             :                           PropertyDetails details) {
     170             :   // Range check.
     171             :   DCHECK(descriptor_number < number_of_descriptors());
     172   143072453 :   set(ToKeyIndex(descriptor_number), MaybeObject::FromObject(key));
     173   143072460 :   set(ToValueIndex(descriptor_number), value);
     174             :   set(ToDetailsIndex(descriptor_number),
     175   143072433 :       MaybeObject::FromObject(details.AsSmi()));
     176   143072460 : }
     177             : 
     178    20571282 : void DescriptorArray::Set(int descriptor_number, Descriptor* desc) {
     179    20571282 :   Name key = *desc->GetKey();
     180    20571282 :   MaybeObject value = *desc->GetValue();
     181    20571284 :   Set(descriptor_number, key, value, desc->GetDetails());
     182    20571287 : }
     183             : 
     184    18527112 : void DescriptorArray::Append(Descriptor* desc) {
     185             :   DisallowHeapAllocation no_gc;
     186    18527112 :   int descriptor_number = number_of_descriptors();
     187             :   DCHECK_LE(descriptor_number + 1, number_of_all_descriptors());
     188    18527112 :   set_number_of_descriptors(descriptor_number + 1);
     189    18527112 :   Set(descriptor_number, desc);
     190             : 
     191    18527121 :   uint32_t hash = desc->GetKey()->Hash();
     192             : 
     193             :   int insertion;
     194             : 
     195   556551137 :   for (insertion = descriptor_number; insertion > 0; --insertion) {
     196   279658843 :     Name key = GetSortedKey(insertion - 1);
     197   279658855 :     if (key->Hash() <= hash) break;
     198   269012021 :     SetSortedKey(insertion, GetSortedKeyIndex(insertion - 1));
     199             :   }
     200             : 
     201    18527135 :   SetSortedKey(insertion, descriptor_number);
     202    18527134 : }
     203             : 
     204   235414590 : void DescriptorArray::SwapSortedKeys(int first, int second) {
     205             :   int first_key = GetSortedKeyIndex(first);
     206   235414475 :   SetSortedKey(first, GetSortedKeyIndex(second));
     207   235414607 :   SetSortedKey(second, first_key);
     208   235413889 : }
     209             : 
     210             : int DescriptorArray::length() const {
     211             :   return number_of_all_descriptors() * kEntrySize;
     212             : }
     213             : 
     214             : MaybeObject DescriptorArray::get(int index) const {
     215             :   DCHECK(index >= 0 && index < this->length());
     216  5638949481 :   return RELAXED_READ_WEAK_FIELD(*this, offset(index));
     217             : }
     218             : 
     219  1289326592 : void DescriptorArray::set(int index, MaybeObject value) {
     220             :   DCHECK(index >= 0 && index < this->length());
     221  1289326592 :   RELAXED_WRITE_WEAK_FIELD(*this, offset(index), value);
     222  2578653837 :   WEAK_WRITE_BARRIER(*this, offset(index), value);
     223  1289327334 : }
     224             : 
     225             : }  // namespace internal
     226             : }  // namespace v8
     227             : 
     228             : #include "src/objects/object-macros-undef.h"
     229             : 
     230             : #endif  // V8_OBJECTS_DESCRIPTOR_ARRAY_INL_H_

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