deps: V8: cherry-pick 1a7d55a9a427

Original commit message: Merged: [runtime] Fix sorted order of DescriptorArray entries Revision: 518d67ad652fc24b7eb03e48bb342f952d4ccf74 This is a reland of the previous merge which addresses the cctest link failure in component build mode. BUG=chromium:1133527 NOTRY=true NOPRESUBMIT=true NOTREECHECKS=true R=verwaest@chromium.org Change-Id: Icbbc69fd5403fd0c2ab6d07d4340292b2b8c72b9 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2504264 Reviewed-by: Toon Verwaest <verwaest@chromium.org> Cr-Commit-Position: refs/branch-heads/8.6@{#40} Cr-Branched-From: a64aed2333abf49e494d2a5ce24bbd14fff19f60-refs/heads/8.6.395@{#1} Cr-Branched-From: a626bc036236c9bf92ac7b87dc40c9e538b087e3-refs/heads/master@{#69472} Refs: v8/v8@1a7d55a PR-URL: #38275 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Shelley Vohr <codebytere@gmail.com>
nodejs · Apr 30, 2021 · c5fe3a2 · c5fe3a2
1 parent 7dd68ac
commit c5fe3a2
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Showing 16 changed files with 490 additions and 38 deletions.
diff --git a/common.gypi b/common.gypi
@@ -36,7 +36,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.52',
+    'v8_embedder_string': '-node.53',
 
     ##### V8 defaults for Node.js #####
 

diff --git a/deps/v8/src/codegen/code-stub-assembler.cc b/deps/v8/src/codegen/code-stub-assembler.cc
@@ -1801,12 +1801,13 @@ TNode<IntPtrT> CodeStubAssembler::LoadJSReceiverIdentityHash(
   return var_hash.value();
 }
 
-TNode<Uint32T> CodeStubAssembler::LoadNameHashField(SloppyTNode<Name> name) {
-  CSA_ASSERT(this, IsName(name));
-  return LoadObjectField<Uint32T>(name, Name::kHashFieldOffset);
+TNode<Uint32T> CodeStubAssembler::LoadNameHashAssumeComputed(TNode<Name> name) {
+  TNode<Uint32T> hash_field = LoadNameHashField(name);
+  CSA_ASSERT(this, IsClearWord32(hash_field, Name::kHashNotComputedMask));
+  return Unsigned(Word32Shr(hash_field, Int32Constant(Name::kHashShift)));
 }
 
-TNode<Uint32T> CodeStubAssembler::LoadNameHash(SloppyTNode<Name> name,
+TNode<Uint32T> CodeStubAssembler::LoadNameHash(TNode<Name> name,
                                                Label* if_hash_not_computed) {
   TNode<Uint32T> hash_field = LoadNameHashField(name);
   if (if_hash_not_computed != nullptr) {
@@ -1994,13 +1995,13 @@ TNode<T> CodeStubAssembler::LoadArrayElement(TNode<Array> array,
   }
 }
 
-template TNode<MaybeObject>
+template V8_EXPORT_PRIVATE TNode<MaybeObject>
 CodeStubAssembler::LoadArrayElement<TransitionArray>(TNode<TransitionArray>,
                                                      int, Node*, int,
                                                      ParameterMode,
                                                      LoadSensitivity);
 
-template TNode<MaybeObject>
+template V8_EXPORT_PRIVATE TNode<MaybeObject>
 CodeStubAssembler::LoadArrayElement<DescriptorArray>(TNode<DescriptorArray>,
                                                      int, Node*, int,
                                                      ParameterMode,
@@ -8063,7 +8064,7 @@ void CodeStubAssembler::LookupBinary(TNode<Name> unique_name,
   TNode<Uint32T> limit =
       Unsigned(Int32Sub(NumberOfEntries<Array>(array), Int32Constant(1)));
   TVARIABLE(Uint32T, var_high, limit);
-  TNode<Uint32T> hash = LoadNameHashField(unique_name);
+  TNode<Uint32T> hash = LoadNameHashAssumeComputed(unique_name);
   CSA_ASSERT(this, Word32NotEqual(hash, Int32Constant(0)));
 
   // Assume non-empty array.
@@ -8081,7 +8082,7 @@ void CodeStubAssembler::LookupBinary(TNode<Name> unique_name,
     TNode<Uint32T> sorted_key_index = GetSortedKeyIndex<Array>(array, mid);
     TNode<Name> mid_name = GetKey<Array>(array, sorted_key_index);
 
-    TNode<Uint32T> mid_hash = LoadNameHashField(mid_name);
+    TNode<Uint32T> mid_hash = LoadNameHashAssumeComputed(mid_name);
 
     Label mid_greater(this), mid_less(this), merge(this);
     Branch(Uint32GreaterThanOrEqual(mid_hash, hash), &mid_greater, &mid_less);
@@ -8108,7 +8109,7 @@ void CodeStubAssembler::LookupBinary(TNode<Name> unique_name,
     TNode<Uint32T> sort_index =
         GetSortedKeyIndex<Array>(array, var_low.value());
     TNode<Name> current_name = GetKey<Array>(array, sort_index);
-    TNode<Uint32T> current_hash = LoadNameHashField(current_name);
+    TNode<Uint32T> current_hash = LoadNameHashAssumeComputed(current_name);
     GotoIf(Word32NotEqual(current_hash, hash), if_not_found);
     Label next(this);
     GotoIf(TaggedNotEqual(current_name, unique_name), &next);

diff --git a/deps/v8/src/codegen/code-stub-assembler.h b/deps/v8/src/codegen/code-stub-assembler.h
@@ -1353,13 +1353,12 @@ class V8_EXPORT_PRIVATE CodeStubAssembler
   // Check if the map is set for slow properties.
   TNode<BoolT> IsDictionaryMap(SloppyTNode<Map> map);
 
-  // Load the hash field of a name as an uint32 value.
-  TNode<Uint32T> LoadNameHashField(SloppyTNode<Name> name);
-  // Load the hash value of a name as an uint32 value.
+  // Load the Name::hash() value of a name as an uint32 value.
   // If {if_hash_not_computed} label is specified then it also checks if
   // hash is actually computed.
-  TNode<Uint32T> LoadNameHash(SloppyTNode<Name> name,
+  TNode<Uint32T> LoadNameHash(TNode<Name> name,
                               Label* if_hash_not_computed = nullptr);
+  TNode<Uint32T> LoadNameHashAssumeComputed(TNode<Name> name);
 
   // Load length field of a String object as Smi value.
   TNode<Smi> LoadStringLengthAsSmi(TNode<String> string);

diff --git a/deps/v8/src/diagnostics/objects-debug.cc b/deps/v8/src/diagnostics/objects-debug.cc
@@ -1667,12 +1667,13 @@ bool DescriptorArray::IsSortedNoDuplicates(int valid_entries) {
   uint32_t current = 0;
   for (int i = 0; i < number_of_descriptors(); i++) {
     Name key = GetSortedKey(i);
+    CHECK(key.HasHashCode());
     if (key == current_key) {
       Print();
       return false;
     }
     current_key = key;
-    uint32_t hash = GetSortedKey(i).Hash();
+    uint32_t hash = key.hash();
     if (hash < current) {
       Print();
       return false;
@@ -1691,7 +1692,8 @@ bool TransitionArray::IsSortedNoDuplicates(int valid_entries) {
 
   for (int i = 0; i < number_of_transitions(); i++) {
     Name key = GetSortedKey(i);
-    uint32_t hash = key.Hash();
+    CHECK(key.HasHashCode());
+    uint32_t hash = key.hash();
     PropertyKind kind = kData;
     PropertyAttributes attributes = NONE;
     if (!TransitionsAccessor::IsSpecialTransition(key.GetReadOnlyRoots(),

diff --git a/deps/v8/src/objects/descriptor-array-inl.h b/deps/v8/src/objects/descriptor-array-inl.h
@@ -226,7 +226,7 @@ void DescriptorArray::Append(Descriptor* desc) {
 
   for (insertion = descriptor_number; insertion > 0; --insertion) {
     Name key = GetSortedKey(insertion - 1);
-    if (key.Hash() <= hash) break;
+    if (key.hash() <= hash) break;
     SetSortedKey(insertion, GetSortedKeyIndex(insertion - 1));
   }
 

diff --git a/deps/v8/src/objects/descriptor-array.h b/deps/v8/src/objects/descriptor-array.h
@@ -113,7 +113,7 @@ class DescriptorArray
       int slack = 0);
 
   // Sort the instance descriptors by the hash codes of their keys.
-  void Sort();
+  V8_EXPORT_PRIVATE void Sort();
 
   // Search the instance descriptors for given name.
   V8_INLINE InternalIndex Search(Name name, int number_of_own_descriptors);

diff --git a/deps/v8/src/objects/fixed-array-inl.h b/deps/v8/src/objects/fixed-array-inl.h
@@ -212,15 +212,15 @@ int BinarySearch(T* array, Name name, int valid_entries,
   DCHECK(search_mode == ALL_ENTRIES || out_insertion_index == nullptr);
   int low = 0;
   int high = array->number_of_entries() - 1;
-  uint32_t hash = name.hash_field();
+  uint32_t hash = name.hash();
   int limit = high;
 
   DCHECK(low <= high);
 
   while (low != high) {
     int mid = low + (high - low) / 2;
     Name mid_name = array->GetSortedKey(mid);
-    uint32_t mid_hash = mid_name.hash_field();
+    uint32_t mid_hash = mid_name.hash();
 
     if (mid_hash >= hash) {
       high = mid;
@@ -232,7 +232,7 @@ int BinarySearch(T* array, Name name, int valid_entries,
   for (; low <= limit; ++low) {
     int sort_index = array->GetSortedKeyIndex(low);
     Name entry = array->GetKey(InternalIndex(sort_index));
-    uint32_t current_hash = entry.hash_field();
+    uint32_t current_hash = entry.hash();
     if (current_hash != hash) {
       if (search_mode == ALL_ENTRIES && out_insertion_index != nullptr) {
         *out_insertion_index = sort_index + (current_hash > hash ? 0 : 1);
@@ -259,12 +259,12 @@ template <SearchMode search_mode, typename T>
 int LinearSearch(T* array, Name name, int valid_entries,
                  int* out_insertion_index) {
   if (search_mode == ALL_ENTRIES && out_insertion_index != nullptr) {
-    uint32_t hash = name.hash_field();
+    uint32_t hash = name.hash();
     int len = array->number_of_entries();
     for (int number = 0; number < len; number++) {
       int sorted_index = array->GetSortedKeyIndex(number);
       Name entry = array->GetKey(InternalIndex(sorted_index));
-      uint32_t current_hash = entry.hash_field();
+      uint32_t current_hash = entry.hash();
       if (current_hash > hash) {
         *out_insertion_index = sorted_index;
         return T::kNotFound;

diff --git a/deps/v8/src/objects/name-inl.h b/deps/v8/src/objects/name-inl.h
@@ -94,6 +94,12 @@ uint32_t Name::Hash() {
   return String::cast(*this).ComputeAndSetHash();
 }
 
+uint32_t Name::hash() const {
+  uint32_t field = hash_field();
+  DCHECK(IsHashFieldComputed(field));
+  return field >> kHashShift;
+}
+
 DEF_GETTER(Name, IsInterestingSymbol, bool) {
   return IsSymbol(isolate) && Symbol::cast(*this).is_interesting_symbol();
 }

diff --git a/deps/v8/src/objects/name.h b/deps/v8/src/objects/name.h
@@ -23,9 +23,15 @@ class Name : public TorqueGeneratedName<Name, PrimitiveHeapObject> {
   // Tells whether the hash code has been computed.
   inline bool HasHashCode();
 
-  // Returns a hash value used for the property table
+  // Returns a hash value used for the property table. Ensures that the hash
+  // value is computed.
+  // TODO(ishell): rename to EnsureHash().
   inline uint32_t Hash();
 
+  // Returns a hash value used for the property table (same as Hash()), assumes
+  // the hash is already computed.
+  inline uint32_t hash() const;
+
   // Equality operations.
   inline bool Equals(Name other);
   inline static bool Equals(Isolate* isolate, Handle<Name> one,

diff --git a/deps/v8/src/objects/objects.cc b/deps/v8/src/objects/objects.cc
@@ -4355,16 +4355,16 @@ void DescriptorArray::Sort() {
   // Reset sorting since the descriptor array might contain invalid pointers.
   for (int i = 0; i < len; ++i) SetSortedKey(i, i);
   // Bottom-up max-heap construction.
-  // Index of the last node with children
+  // Index of the last node with children.
   const int max_parent_index = (len / 2) - 1;
   for (int i = max_parent_index; i >= 0; --i) {
     int parent_index = i;
-    const uint32_t parent_hash = GetSortedKey(i).Hash();
+    const uint32_t parent_hash = GetSortedKey(i).hash();
     while (parent_index <= max_parent_index) {
       int child_index = 2 * parent_index + 1;
-      uint32_t child_hash = GetSortedKey(child_index).Hash();
+      uint32_t child_hash = GetSortedKey(child_index).hash();
       if (child_index + 1 < len) {
-        uint32_t right_child_hash = GetSortedKey(child_index + 1).Hash();
+        uint32_t right_child_hash = GetSortedKey(child_index + 1).hash();
         if (right_child_hash > child_hash) {
           child_index++;
           child_hash = right_child_hash;
@@ -4383,13 +4383,13 @@ void DescriptorArray::Sort() {
     SwapSortedKeys(0, i);
     // Shift down the new top element.
     int parent_index = 0;
-    const uint32_t parent_hash = GetSortedKey(parent_index).Hash();
+    const uint32_t parent_hash = GetSortedKey(parent_index).hash();
     const int max_parent_index = (i / 2) - 1;
     while (parent_index <= max_parent_index) {
       int child_index = parent_index * 2 + 1;
-      uint32_t child_hash = GetSortedKey(child_index).Hash();
+      uint32_t child_hash = GetSortedKey(child_index).hash();
       if (child_index + 1 < i) {
-        uint32_t right_child_hash = GetSortedKey(child_index + 1).Hash();
+        uint32_t right_child_hash = GetSortedKey(child_index + 1).hash();
         if (right_child_hash > child_hash) {
           child_index++;
           child_hash = right_child_hash;

diff --git a/deps/v8/src/objects/transitions-inl.h b/deps/v8/src/objects/transitions-inl.h
@@ -169,12 +169,20 @@ int TransitionArray::SearchNameForTesting(Name name, int* out_insertion_index) {
   return SearchName(name, out_insertion_index);
 }
 
+Map TransitionArray::SearchAndGetTargetForTesting(
+    PropertyKind kind, Name name, PropertyAttributes attributes) {
+  return SearchAndGetTarget(kind, name, attributes);
+}
+
 int TransitionArray::SearchSpecial(Symbol symbol, int* out_insertion_index) {
   return SearchName(symbol, out_insertion_index);
 }
 
 int TransitionArray::SearchName(Name name, int* out_insertion_index) {
   DCHECK(name.IsUniqueName());
+  // The name is taken from DescriptorArray, so it must already has a computed
+  // hash.
+  DCHECK(name.HasHashCode());
   return internal::Search<ALL_ENTRIES>(this, name, number_of_entries(),
                                        out_insertion_index);
 }

diff --git a/deps/v8/src/objects/transitions.cc b/deps/v8/src/objects/transitions.cc
@@ -619,8 +619,8 @@ void TransitionArray::Sort() {
         temp_kind = details.kind();
         temp_attributes = details.attributes();
       }
-      int cmp = CompareKeys(temp_key, temp_key.Hash(), temp_kind,
-                            temp_attributes, key, key.Hash(), kind, attributes);
+      int cmp = CompareKeys(temp_key, temp_key.hash(), temp_kind,
+                            temp_attributes, key, key.hash(), kind, attributes);
       if (cmp > 0) {
         SetKey(j + 1, temp_key);
         SetRawTarget(j + 1, temp_target);

diff --git a/deps/v8/src/objects/transitions.h b/deps/v8/src/objects/transitions.h
@@ -143,6 +143,8 @@ class V8_EXPORT_PRIVATE TransitionsAccessor {
     return encoding_;
   }
 
+  inline TransitionArray transitions();
+
  private:
   friend class MarkCompactCollector;  // For HasSimpleTransitionTo.
   friend class TransitionArray;
@@ -175,8 +177,6 @@ class V8_EXPORT_PRIVATE TransitionsAccessor {
   void TraverseTransitionTreeInternal(TraverseCallback callback, void* data,
                                       DisallowHeapAllocation* no_gc);
 
-  inline TransitionArray transitions();
-
   Isolate* isolate_;
   Handle<Map> map_handle_;
   Map map_;
@@ -231,7 +231,7 @@ class TransitionArray : public WeakFixedArray {
   V8_EXPORT_PRIVATE bool IsSortedNoDuplicates(int valid_entries = -1);
 #endif
 
-  void Sort();
+  V8_EXPORT_PRIVATE void Sort();
 
   void PrintInternal(std::ostream& os);
 
@@ -260,6 +260,9 @@ class TransitionArray : public WeakFixedArray {
   inline int SearchNameForTesting(Name name,
                                   int* out_insertion_index = nullptr);
 
+  inline Map SearchAndGetTargetForTesting(PropertyKind kind, Name name,
+                                          PropertyAttributes attributes);
+
  private:
   friend class Factory;
   friend class MarkCompactCollector;
@@ -296,8 +299,8 @@ class TransitionArray : public WeakFixedArray {
   int Search(PropertyKind kind, Name name, PropertyAttributes attributes,
              int* out_insertion_index = nullptr);
 
-  Map SearchAndGetTarget(PropertyKind kind, Name name,
-                         PropertyAttributes attributes);
+  V8_EXPORT_PRIVATE Map SearchAndGetTarget(PropertyKind kind, Name name,
+                                           PropertyAttributes attributes);
 
   // Search a non-property transition (like elements kind, observe or frozen
   // transitions).

diff --git a/deps/v8/test/cctest/BUILD.gn b/deps/v8/test/cctest/BUILD.gn
@@ -204,6 +204,7 @@ v8_source_set("cctest_sources") {
     "test-debug.cc",
     "test-decls.cc",
     "test-deoptimization.cc",
+    "test-descriptor-array.cc",
     "test-dictionary.cc",
     "test-diy-fp.cc",
     "test-double.cc",