deps: update V8 to 7.7.299.4

PR-URL: https://github.com/nodejs/node/pull/28918
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

18 files changed, 310 insertions, 115 deletions

diff --git a/deps/v8/src/interpreter/OWNERS b/deps/v8/src/interpreter/OWNERS
index e985bda102..254e6e60d1 100644
--- a/deps/v8/src/interpreter/OWNERS
+++ b/deps/v8/src/interpreter/OWNERS
@@ -1,5 +1,3 @@
-set noparent
-
 bmeurer@chromium.org
 leszeks@chromium.org
 mstarzinger@chromium.org
diff --git a/deps/v8/src/interpreter/bytecode-array-accessor.cc b/deps/v8/src/interpreter/bytecode-array-accessor.cc
index d7232fcd4c..d460c1a45f 100644
--- a/deps/v8/src/interpreter/bytecode-array-accessor.cc
+++ b/deps/v8/src/interpreter/bytecode-array-accessor.cc
@@ -14,15 +14,61 @@ namespace v8 {
 namespace internal {
 namespace interpreter {
 
+namespace {
+
+class OnHeapBytecodeArray final : public AbstractBytecodeArray {
+ public:
+  explicit OnHeapBytecodeArray(Handle<BytecodeArray> bytecode_array)
+      : array_(bytecode_array) {}
+
+  int length() const override { return array_->length(); }
+
+  int parameter_count() const override { return array_->parameter_count(); }
+
+  uint8_t get(int index) const override { return array_->get(index); }
+
+  void set(int index, uint8_t value) override {
+    return array_->set(index, value);
+  }
+
+  Address GetFirstBytecodeAddress() const override {
+    return array_->GetFirstBytecodeAddress();
+  }
+
+  Handle<Object> GetConstantAtIndex(int index,
+                                    Isolate* isolate) const override {
+    return handle(array_->constant_pool().get(index), isolate);
+  }
+
+  bool IsConstantAtIndexSmi(int index) const override {
+    return array_->constant_pool().get(index).IsSmi();
+  }
+
+  Smi GetConstantAtIndexAsSmi(int index) const override {
+    return Smi::cast(array_->constant_pool().get(index));
+  }
+
+ private:
+  Handle<BytecodeArray> array_;
+};
+
+}  // namespace
+
 BytecodeArrayAccessor::BytecodeArrayAccessor(
-    Handle<BytecodeArray> bytecode_array, int initial_offset)
-    : bytecode_array_(bytecode_array),
+    std::unique_ptr<AbstractBytecodeArray> bytecode_array, int initial_offset)
+    : bytecode_array_(std::move(bytecode_array)),
       bytecode_offset_(initial_offset),
       operand_scale_(OperandScale::kSingle),
       prefix_offset_(0) {
   UpdateOperandScale();
 }
 
+BytecodeArrayAccessor::BytecodeArrayAccessor(
+    Handle<BytecodeArray> bytecode_array, int initial_offset)
+    : BytecodeArrayAccessor(
+          base::make_unique<OnHeapBytecodeArray>(bytecode_array),
+          initial_offset) {}
+
 void BytecodeArrayAccessor::SetOffset(int offset) {
   bytecode_offset_ = offset;
   UpdateOperandScale();
@@ -33,12 +79,12 @@ void BytecodeArrayAccessor::ApplyDebugBreak() {
   // scaling prefix, which we can patch with the matching debug-break
   // variant.
   interpreter::Bytecode bytecode =
-      interpreter::Bytecodes::FromByte(bytecode_array_->get(bytecode_offset_));
+      interpreter::Bytecodes::FromByte(bytecode_array()->get(bytecode_offset_));
   if (interpreter::Bytecodes::IsDebugBreak(bytecode)) return;
   interpreter::Bytecode debugbreak =
       interpreter::Bytecodes::GetDebugBreak(bytecode);
-  bytecode_array_->set(bytecode_offset_,
-                       interpreter::Bytecodes::ToByte(debugbreak));
+  bytecode_array()->set(bytecode_offset_,
+                        interpreter::Bytecodes::ToByte(debugbreak));
 }
 
 void BytecodeArrayAccessor::UpdateOperandScale() {
@@ -197,13 +243,22 @@ Runtime::FunctionId BytecodeArrayAccessor::GetIntrinsicIdOperand(
       static_cast<IntrinsicsHelper::IntrinsicId>(raw_id));
 }
 
-Object BytecodeArrayAccessor::GetConstantAtIndex(int index) const {
-  return bytecode_array()->constant_pool().get(index);
+Handle<Object> BytecodeArrayAccessor::GetConstantAtIndex(
+    int index, Isolate* isolate) const {
+  return bytecode_array()->GetConstantAtIndex(index, isolate);
 }
 
-Object BytecodeArrayAccessor::GetConstantForIndexOperand(
-    int operand_index) const {
-  return GetConstantAtIndex(GetIndexOperand(operand_index));
+bool BytecodeArrayAccessor::IsConstantAtIndexSmi(int index) const {
+  return bytecode_array()->IsConstantAtIndexSmi(index);
+}
+
+Smi BytecodeArrayAccessor::GetConstantAtIndexAsSmi(int index) const {
+  return bytecode_array()->GetConstantAtIndexAsSmi(index);
+}
+
+Handle<Object> BytecodeArrayAccessor::GetConstantForIndexOperand(
+    int operand_index, Isolate* isolate) const {
+  return GetConstantAtIndex(GetIndexOperand(operand_index), isolate);
 }
 
 int BytecodeArrayAccessor::GetJumpTargetOffset() const {
@@ -215,7 +270,7 @@ int BytecodeArrayAccessor::GetJumpTargetOffset() const {
     }
     return GetAbsoluteOffset(relative_offset);
   } else if (interpreter::Bytecodes::IsJumpConstant(bytecode)) {
-    Smi smi = Smi::cast(GetConstantForIndexOperand(0));
+    Smi smi = GetConstantAtIndexAsSmi(GetIndexOperand(0));
     return GetAbsoluteOffset(smi.value());
   } else {
     UNREACHABLE();
@@ -315,19 +370,16 @@ bool JumpTableTargetOffsets::iterator::operator!=(
 }
 
 void JumpTableTargetOffsets::iterator::UpdateAndAdvanceToValid() {
-  if (table_offset_ >= table_end_) return;
-
-  Object current = accessor_->GetConstantAtIndex(table_offset_);
-  while (!current.IsSmi()) {
-    DCHECK(current.IsTheHole());
+  while (table_offset_ < table_end_ &&
+         !accessor_->IsConstantAtIndexSmi(table_offset_)) {
     ++table_offset_;
     ++index_;
-    if (table_offset_ >= table_end_) break;
-    current = accessor_->GetConstantAtIndex(table_offset_);
   }
+
   // Make sure we haven't reached the end of the table with a hole in current.
-  if (current.IsSmi()) {
-    current_ = Smi::cast(current);
+  if (table_offset_ < table_end_) {
+    DCHECK(accessor_->IsConstantAtIndexSmi(table_offset_));
+    current_ = accessor_->GetConstantAtIndexAsSmi(table_offset_);
   }
 }
 
diff --git a/deps/v8/src/interpreter/bytecode-array-accessor.h b/deps/v8/src/interpreter/bytecode-array-accessor.h
index 91b6886204..97278af7bd 100644
--- a/deps/v8/src/interpreter/bytecode-array-accessor.h
+++ b/deps/v8/src/interpreter/bytecode-array-accessor.h
@@ -5,6 +5,7 @@
 #ifndef V8_INTERPRETER_BYTECODE_ARRAY_ACCESSOR_H_
 #define V8_INTERPRETER_BYTECODE_ARRAY_ACCESSOR_H_
 
+#include "src/base/optional.h"
 #include "src/common/globals.h"
 #include "src/handles/handles.h"
 #include "src/interpreter/bytecode-register.h"
@@ -64,8 +65,27 @@ class V8_EXPORT_PRIVATE JumpTableTargetOffsets final {
   int case_value_base_;
 };
 
+class V8_EXPORT_PRIVATE AbstractBytecodeArray {
+ public:
+  virtual int length() const = 0;
+  virtual int parameter_count() const = 0;
+  virtual uint8_t get(int index) const = 0;
+  virtual void set(int index, uint8_t value) = 0;
+  virtual Address GetFirstBytecodeAddress() const = 0;
+
+  virtual Handle<Object> GetConstantAtIndex(int index,
+                                            Isolate* isolate) const = 0;
+  virtual bool IsConstantAtIndexSmi(int index) const = 0;
+  virtual Smi GetConstantAtIndexAsSmi(int index) const = 0;
+
+  virtual ~AbstractBytecodeArray() = default;
+};
+
 class V8_EXPORT_PRIVATE BytecodeArrayAccessor {
  public:
+  BytecodeArrayAccessor(std::unique_ptr<AbstractBytecodeArray> bytecode_array,
+                        int initial_offset);
+
   BytecodeArrayAccessor(Handle<BytecodeArray> bytecode_array,
                         int initial_offset);
 
@@ -78,8 +98,8 @@ class V8_EXPORT_PRIVATE BytecodeArrayAccessor {
   int current_offset() const { return bytecode_offset_; }
   OperandScale current_operand_scale() const { return operand_scale_; }
   int current_prefix_offset() const { return prefix_offset_; }
-  const Handle<BytecodeArray>& bytecode_array() const {
-    return bytecode_array_;
+  AbstractBytecodeArray* bytecode_array() const {
+    return bytecode_array_.get();
   }
 
   uint32_t GetFlagOperand(int operand_index) const;
@@ -93,8 +113,11 @@ class V8_EXPORT_PRIVATE BytecodeArrayAccessor {
   Runtime::FunctionId GetRuntimeIdOperand(int operand_index) const;
   Runtime::FunctionId GetIntrinsicIdOperand(int operand_index) const;
   uint32_t GetNativeContextIndexOperand(int operand_index) const;
-  Object GetConstantAtIndex(int offset) const;
-  Object GetConstantForIndexOperand(int operand_index) const;
+  Handle<Object> GetConstantAtIndex(int offset, Isolate* isolate) const;
+  bool IsConstantAtIndexSmi(int offset) const;
+  Smi GetConstantAtIndexAsSmi(int offset) const;
+  Handle<Object> GetConstantForIndexOperand(int operand_index,
+                                            Isolate* isolate) const;
 
   // Returns the absolute offset of the branch target at the current bytecode.
   // It is an error to call this method if the bytecode is not for a jump or
@@ -122,7 +145,7 @@ class V8_EXPORT_PRIVATE BytecodeArrayAccessor {
 
   void UpdateOperandScale();
 
-  Handle<BytecodeArray> bytecode_array_;
+  std::unique_ptr<AbstractBytecodeArray> bytecode_array_;
   int bytecode_offset_;
   OperandScale operand_scale_;
   int prefix_offset_;
diff --git a/deps/v8/src/interpreter/bytecode-array-iterator.cc b/deps/v8/src/interpreter/bytecode-array-iterator.cc
index b582311007..0fc57f85b8 100644
--- a/deps/v8/src/interpreter/bytecode-array-iterator.cc
+++ b/deps/v8/src/interpreter/bytecode-array-iterator.cc
@@ -11,6 +11,10 @@ namespace internal {
 namespace interpreter {
 
 BytecodeArrayIterator::BytecodeArrayIterator(
+    std::unique_ptr<AbstractBytecodeArray> bytecode_array)
+    : BytecodeArrayAccessor(std::move(bytecode_array), 0) {}
+
+BytecodeArrayIterator::BytecodeArrayIterator(
     Handle<BytecodeArray> bytecode_array)
     : BytecodeArrayAccessor(bytecode_array, 0) {}
 
diff --git a/deps/v8/src/interpreter/bytecode-array-iterator.h b/deps/v8/src/interpreter/bytecode-array-iterator.h
index 7ec9d1288c..e6b58deadc 100644
--- a/deps/v8/src/interpreter/bytecode-array-iterator.h
+++ b/deps/v8/src/interpreter/bytecode-array-iterator.h
@@ -14,7 +14,9 @@ namespace interpreter {
 class V8_EXPORT_PRIVATE BytecodeArrayIterator final
     : public BytecodeArrayAccessor {
  public:
-  explicit BytecodeArrayIterator(Handle<BytecodeArray> bytecode_array);
+  explicit BytecodeArrayIterator(std::unique_ptr<AbstractBytecodeArray> array);
+
+  explicit BytecodeArrayIterator(Handle<BytecodeArray> array);
 
   void Advance();
   bool done() const;
diff --git a/deps/v8/src/interpreter/bytecode-array-random-iterator.cc b/deps/v8/src/interpreter/bytecode-array-random-iterator.cc
index 4ed5ce5e7d..9362232899 100644
--- a/deps/v8/src/interpreter/bytecode-array-random-iterator.cc
+++ b/deps/v8/src/interpreter/bytecode-array-random-iterator.cc
@@ -11,11 +11,21 @@ namespace internal {
 namespace interpreter {
 
 BytecodeArrayRandomIterator::BytecodeArrayRandomIterator(
+    std::unique_ptr<AbstractBytecodeArray> bytecode_array, Zone* zone)
+    : BytecodeArrayAccessor(std::move(bytecode_array), 0), offsets_(zone) {
+  Initialize();
+}
+
+BytecodeArrayRandomIterator::BytecodeArrayRandomIterator(
     Handle<BytecodeArray> bytecode_array, Zone* zone)
     : BytecodeArrayAccessor(bytecode_array, 0), offsets_(zone) {
+  Initialize();
+}
+
+void BytecodeArrayRandomIterator::Initialize() {
   // Run forwards through the bytecode array to determine the offset of each
   // bytecode.
-  while (current_offset() < bytecode_array->length()) {
+  while (current_offset() < bytecode_array()->length()) {
     offsets_.push_back(current_offset());
     SetOffset(current_offset() + current_bytecode_size());
   }
diff --git a/deps/v8/src/interpreter/bytecode-array-random-iterator.h b/deps/v8/src/interpreter/bytecode-array-random-iterator.h
index 7d559ea176..a3b69b7015 100644
--- a/deps/v8/src/interpreter/bytecode-array-random-iterator.h
+++ b/deps/v8/src/interpreter/bytecode-array-random-iterator.h
@@ -16,8 +16,10 @@ namespace interpreter {
 class V8_EXPORT_PRIVATE BytecodeArrayRandomIterator final
     : public BytecodeArrayAccessor {
  public:
-  explicit BytecodeArrayRandomIterator(Handle<BytecodeArray> bytecode_array,
-                                       Zone* zone);
+  BytecodeArrayRandomIterator(
+      std::unique_ptr<AbstractBytecodeArray> bytecode_array, Zone* zone);
+
+  BytecodeArrayRandomIterator(Handle<BytecodeArray> bytecode_array, Zone* zone);
 
   BytecodeArrayRandomIterator& operator++() {
     ++current_index_;
@@ -66,6 +68,7 @@ class V8_EXPORT_PRIVATE BytecodeArrayRandomIterator final
   ZoneVector<int> offsets_;
   int current_index_;
 
+  void Initialize();
   void UpdateOffsetFromIndex();
 
   DISALLOW_COPY_AND_ASSIGN(BytecodeArrayRandomIterator);
diff --git a/deps/v8/src/interpreter/bytecode-array-writer.cc b/deps/v8/src/interpreter/bytecode-array-writer.cc
index 3769eefda1..3ecc5e1a89 100644
--- a/deps/v8/src/interpreter/bytecode-array-writer.cc
+++ b/deps/v8/src/interpreter/bytecode-array-writer.cc
@@ -334,8 +334,8 @@ void BytecodeArrayWriter::PatchJumpWith16BitOperand(size_t jump_location,
     // The jump fits within the range of an Imm16 operand, so cancel
     // the reservation and jump directly.
     constant_array_builder()->DiscardReservedEntry(OperandSize::kShort);
-    WriteUnalignedUInt16(reinterpret_cast<Address>(operand_bytes),
-                         static_cast<uint16_t>(delta));
+    base::WriteUnalignedValue<uint16_t>(
+        reinterpret_cast<Address>(operand_bytes), static_cast<uint16_t>(delta));
   } else {
     // The jump does not fit within the range of an Imm16 operand, so
     // commit reservation putting the offset into the constant pool,
@@ -344,8 +344,8 @@ void BytecodeArrayWriter::PatchJumpWith16BitOperand(size_t jump_location,
         OperandSize::kShort, Smi::FromInt(delta));
     jump_bytecode = GetJumpWithConstantOperand(jump_bytecode);
     bytecodes()->at(jump_location) = Bytecodes::ToByte(jump_bytecode);
-    WriteUnalignedUInt16(reinterpret_cast<Address>(operand_bytes),
-                         static_cast<uint16_t>(entry));
+    base::WriteUnalignedValue<uint16_t>(
+        reinterpret_cast<Address>(operand_bytes), static_cast<uint16_t>(entry));
   }
   DCHECK(bytecodes()->at(operand_location) == k8BitJumpPlaceholder &&
          bytecodes()->at(operand_location + 1) == k8BitJumpPlaceholder);
@@ -359,8 +359,8 @@ void BytecodeArrayWriter::PatchJumpWith32BitOperand(size_t jump_location,
       Bytecodes::FromByte(bytecodes()->at(jump_location))));
   constant_array_builder()->DiscardReservedEntry(OperandSize::kQuad);
   uint8_t operand_bytes[4];
-  WriteUnalignedUInt32(reinterpret_cast<Address>(operand_bytes),
-                       static_cast<uint32_t>(delta));
+  base::WriteUnalignedValue<uint32_t>(reinterpret_cast<Address>(operand_bytes),
+                                      static_cast<uint32_t>(delta));
   size_t operand_location = jump_location + 1;
   DCHECK(bytecodes()->at(operand_location) == k8BitJumpPlaceholder &&
          bytecodes()->at(operand_location + 1) == k8BitJumpPlaceholder &&
diff --git a/deps/v8/src/interpreter/bytecode-decoder.cc b/deps/v8/src/interpreter/bytecode-decoder.cc
index 6f2f9dda0d..3a297b1ddf 100644
--- a/deps/v8/src/interpreter/bytecode-decoder.cc
+++ b/deps/v8/src/interpreter/bytecode-decoder.cc
@@ -42,9 +42,11 @@ int32_t BytecodeDecoder::DecodeSignedOperand(Address operand_start,
     case OperandSize::kByte:
       return *reinterpret_cast<const int8_t*>(operand_start);
     case OperandSize::kShort:
-      return static_cast<int16_t>(ReadUnalignedUInt16(operand_start));
+      return static_cast<int16_t>(
+          base::ReadUnalignedValue<uint16_t>(operand_start));
     case OperandSize::kQuad:
-      return static_cast<int32_t>(ReadUnalignedUInt32(operand_start));
+      return static_cast<int32_t>(
+          base::ReadUnalignedValue<uint32_t>(operand_start));
     case OperandSize::kNone:
       UNREACHABLE();
   }
@@ -60,9 +62,9 @@ uint32_t BytecodeDecoder::DecodeUnsignedOperand(Address operand_start,
     case OperandSize::kByte:
       return *reinterpret_cast<const uint8_t*>(operand_start);
     case OperandSize::kShort:
-      return ReadUnalignedUInt16(operand_start);
+      return base::ReadUnalignedValue<uint16_t>(operand_start);
     case OperandSize::kQuad:
-      return ReadUnalignedUInt32(operand_start);
+      return base::ReadUnalignedValue<uint32_t>(operand_start);
     case OperandSize::kNone:
       UNREACHABLE();
   }
diff --git a/deps/v8/src/interpreter/bytecode-generator.cc b/deps/v8/src/interpreter/bytecode-generator.cc
index 706580ac14..d3b27b4375 100644
--- a/deps/v8/src/interpreter/bytecode-generator.cc
+++ b/deps/v8/src/interpreter/bytecode-generator.cc
@@ -915,6 +915,45 @@ class BytecodeGenerator::IteratorRecord final {
   Register next_;
 };
 
+namespace {
+
+// A map from property names to getter/setter pairs allocated in the zone that
+// also provides a way of accessing the pairs in the order they were first
+// added so that the generated bytecode is always the same.
+class AccessorTable
+    : public base::TemplateHashMap<Literal, ObjectLiteral::Accessors,
+                                   bool (*)(void*, void*),
+                                   ZoneAllocationPolicy> {
+ public:
+  explicit AccessorTable(Zone* zone)
+      : base::TemplateHashMap<Literal, ObjectLiteral::Accessors,
+                              bool (*)(void*, void*), ZoneAllocationPolicy>(
+            Literal::Match, ZoneAllocationPolicy(zone)),
+        zone_(zone) {}
+
+  Iterator lookup(Literal* literal) {
+    Iterator it = find(literal, true, ZoneAllocationPolicy(zone_));
+    if (it->second == nullptr) {
+      it->second = new (zone_) ObjectLiteral::Accessors();
+      ordered_accessors_.push_back({literal, it->second});
+    }
+    return it;
+  }
+
+  const std::vector<std::pair<Literal*, ObjectLiteral::Accessors*>>&
+  ordered_accessors() {
+    return ordered_accessors_;
+  }
+
+ private:
+  std::vector<std::pair<Literal*, ObjectLiteral::Accessors*>>
+      ordered_accessors_;
+
+  Zone* zone_;
+};
+
+}  // namespace
+
 #ifdef DEBUG
 
 static bool IsInEagerLiterals(
@@ -1354,7 +1393,8 @@ void BytecodeGenerator::VisitModuleNamespaceImports() {
   RegisterAllocationScope register_scope(this);
   Register module_request = register_allocator()->NewRegister();
 
-  ModuleDescriptor* descriptor = closure_scope()->AsModuleScope()->module();
+  SourceTextModuleDescriptor* descriptor =
+      closure_scope()->AsModuleScope()->module();
   for (auto entry : descriptor->namespace_imports()) {
     builder()
         ->LoadLiteral(Smi::FromInt(entry->module_request))
@@ -2201,6 +2241,19 @@ void BytecodeGenerator::VisitInitializeClassMembersStatement(
   }
 }
 
+void BytecodeGenerator::BuildThrowPrivateMethodWriteError(
+    const AstRawString* name) {
+  RegisterAllocationScope register_scope(this);
+  RegisterList args = register_allocator()->NewRegisterList(2);
+  builder()
+      ->LoadLiteral(Smi::FromEnum(MessageTemplate::kInvalidPrivateMethodWrite))
+      .StoreAccumulatorInRegister(args[0])
+      .LoadLiteral(name)
+      .StoreAccumulatorInRegister(args[1])
+      .CallRuntime(Runtime::kNewTypeError, args)
+      .Throw();
+}
+
 void BytecodeGenerator::BuildPrivateBrandInitialization(Register receiver) {
   RegisterList brand_args = register_allocator()->NewRegisterList(2);
   Variable* brand = info()->scope()->outer_scope()->AsClassScope()->brand();
@@ -2366,13 +2419,6 @@ void BytecodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
     RegisterAllocationScope register_scope(this);
     Expression* property = expr->properties()->first()->value();
     Register from_value = VisitForRegisterValue(property);
-
-    BytecodeLabels clone_object(zone());
-    builder()->JumpIfUndefined(clone_object.New());
-    builder()->JumpIfNull(clone_object.New());
-    builder()->ToObject(from_value);
-
-    clone_object.Bind(builder());
     int clone_index = feedback_index(feedback_spec()->AddCloneObjectSlot());
     builder()->CloneObject(from_value, flags, clone_index);
     builder()->StoreAccumulatorInRegister(literal);
@@ -2473,14 +2519,13 @@ void BytecodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
 
   // Define accessors, using only a single call to the runtime for each pair of
   // corresponding getters and setters.
-  for (AccessorTable::Iterator it = accessor_table.begin();
-       it != accessor_table.end(); ++it) {
+  for (auto accessors : accessor_table.ordered_accessors()) {
     RegisterAllocationScope inner_register_scope(this);
     RegisterList args = register_allocator()->NewRegisterList(5);
     builder()->MoveRegister(literal, args[0]);
-    VisitForRegisterValue(it->first, args[1]);
-    VisitObjectLiteralAccessor(literal, it->second->getter, args[2]);
-    VisitObjectLiteralAccessor(literal, it->second->setter, args[3]);
+    VisitForRegisterValue(accessors.first, args[1]);
+    VisitObjectLiteralAccessor(literal, accessors.second->getter, args[2]);
+    VisitObjectLiteralAccessor(literal, accessors.second->setter, args[3]);
     builder()
         ->LoadLiteral(Smi::FromInt(NONE))
         .StoreAccumulatorInRegister(args[4])
@@ -3156,6 +3201,13 @@ BytecodeGenerator::AssignmentLhsData::NamedSuperProperty(
 }
 // static
 BytecodeGenerator::AssignmentLhsData
+BytecodeGenerator::AssignmentLhsData::PrivateMethod(Register object,
+                                                    const AstRawString* name) {
+  return AssignmentLhsData(PRIVATE_METHOD, nullptr, RegisterList(), object,
+                           Register(), nullptr, name);
+}
+// static
+BytecodeGenerator::AssignmentLhsData
 BytecodeGenerator::AssignmentLhsData::KeyedSuperProperty(
     RegisterList super_property_args) {
   return AssignmentLhsData(KEYED_SUPER_PROPERTY, nullptr, super_property_args,
@@ -3185,6 +3237,13 @@ BytecodeGenerator::AssignmentLhsData BytecodeGenerator::PrepareAssignmentLhs(
       Register key = VisitForRegisterValue(property->key());
       return AssignmentLhsData::KeyedProperty(object, key);
     }
+    case PRIVATE_METHOD: {
+      DCHECK(!property->IsSuperAccess());
+      AccumulatorPreservingScope scope(this, accumulator_preserving_mode);
+      Register object = VisitForRegisterValue(property->obj());
+      const AstRawString* name = property->key()->AsVariableProxy()->raw_name();
+      return AssignmentLhsData::PrivateMethod(object, name);
+    }
     case NAMED_SUPER_PROPERTY: {
       AccumulatorPreservingScope scope(this, accumulator_preserving_mode);
       RegisterList super_property_args =
@@ -3219,15 +3278,16 @@ BytecodeGenerator::AssignmentLhsData BytecodeGenerator::PrepareAssignmentLhs(
 
 // Build the iteration finalizer called in the finally block of an iteration
 // protocol execution. This closes the iterator if needed, and suppresses any
-// exception it throws if necessary.
+// exception it throws if necessary, including the exception when the return
+// method is not callable.
 //
 // In pseudo-code, this builds:
 //
 // if (!done) {
 //   let method = iterator.return
 //   if (method !== null && method !== undefined) {
-//     if (typeof(method) !== "function") throw TypeError
 //     try {
+//       if (typeof(method) !== "function") throw TypeError
 //       let return_val = method.call(iterator)
 //       if (!%IsObject(return_val)) throw TypeError
 //     } catch (e) {
@@ -3259,33 +3319,35 @@ void BytecodeGenerator::BuildFinalizeIteration(
       .JumpIfUndefined(iterator_is_done.New())
       .JumpIfNull(iterator_is_done.New());
 
-  //     if (typeof(method) !== "function") throw TypeError
-  BytecodeLabel if_callable;
-  builder()
-      ->CompareTypeOf(TestTypeOfFlags::LiteralFlag::kFunction)
-      .JumpIfTrue(ToBooleanMode::kAlreadyBoolean, &if_callable);
-  {
-    // throw %NewTypeError(kReturnMethodNotCallable)
-    RegisterAllocationScope register_scope(this);
-    RegisterList new_type_error_args = register_allocator()->NewRegisterList(2);
-    builder()
-        ->LoadLiteral(Smi::FromEnum(MessageTemplate::kReturnMethodNotCallable))
-        .StoreAccumulatorInRegister(new_type_error_args[0])
-        .LoadLiteral(ast_string_constants()->empty_string())
-        .StoreAccumulatorInRegister(new_type_error_args[1])
-        .CallRuntime(Runtime::kNewTypeError, new_type_error_args)
-        .Throw();
-  }
-  builder()->Bind(&if_callable);
-
   {
     RegisterAllocationScope register_scope(this);
     BuildTryCatch(
         // try {
+        //   if (typeof(method) !== "function") throw TypeError
         //   let return_val = method.call(iterator)
         //   if (!%IsObject(return_val)) throw TypeError
         // }
         [&]() {
+          BytecodeLabel if_callable;
+          builder()
+              ->CompareTypeOf(TestTypeOfFlags::LiteralFlag::kFunction)
+              .JumpIfTrue(ToBooleanMode::kAlreadyBoolean, &if_callable);
+          {
+            // throw %NewTypeError(kReturnMethodNotCallable)
+            RegisterAllocationScope register_scope(this);
+            RegisterList new_type_error_args =
+                register_allocator()->NewRegisterList(2);
+            builder()
+                ->LoadLiteral(
+                    Smi::FromEnum(MessageTemplate::kReturnMethodNotCallable))
+                .StoreAccumulatorInRegister(new_type_error_args[0])
+                .LoadLiteral(ast_string_constants()->empty_string())
+                .StoreAccumulatorInRegister(new_type_error_args[1])
+                .CallRuntime(Runtime::kNewTypeError, new_type_error_args)
+                .Throw();
+          }
+          builder()->Bind(&if_callable);
+
           RegisterList args(iterator.object());
           builder()->CallProperty(
               method, args, feedback_index(feedback_spec()->AddCallICSlot()));
@@ -3736,6 +3798,10 @@ void BytecodeGenerator::BuildAssignment(
                        lhs_data.super_property_args());
       break;
     }
+    case PRIVATE_METHOD: {
+      BuildThrowPrivateMethodWriteError(lhs_data.name());
+      break;
+    }
   }
 }
 
@@ -3781,6 +3847,10 @@ void BytecodeGenerator::VisitCompoundAssignment(CompoundAssignment* expr) {
                              lhs_data.super_property_args().Truncate(3));
       break;
     }
+    case PRIVATE_METHOD: {
+      BuildThrowPrivateMethodWriteError(lhs_data.name());
+      break;
+    }
   }
   BinaryOperation* binop = expr->AsCompoundAssignment()->binary_operation();
   FeedbackSlot slot = feedback_spec()->AddBinaryOpICSlot();
@@ -4238,6 +4308,23 @@ void BytecodeGenerator::VisitPropertyLoad(Register obj, Property* property) {
     case KEYED_SUPER_PROPERTY:
       VisitKeyedSuperPropertyLoad(property, Register::invalid_value());
       break;
+    case PRIVATE_METHOD: {
+      Variable* private_name = property->key()->AsVariableProxy()->var();
+
+      // Perform the brand check.
+      DCHECK(private_name->requires_brand_check());
+      ClassScope* scope = private_name->scope()->AsClassScope();
+      Variable* brand = scope->brand();
+      BuildVariableLoadForAccumulatorValue(brand, HoleCheckMode::kElided);
+      builder()->SetExpressionPosition(property);
+      builder()->LoadKeyedProperty(
+          obj, feedback_index(feedback_spec()->AddKeyedLoadICSlot()));
+
+      // In the case of private methods, property->key() is the function to be
+      // loaded (stored in a context slot), so load this directly.
+      VisitForAccumulatorValue(property->key());
+      break;
+    }
   }
 }
 
@@ -4342,7 +4429,8 @@ void BytecodeGenerator::VisitCall(Call* expr) {
   // the semantics of the underlying call type.
   switch (call_type) {
     case Call::NAMED_PROPERTY_CALL:
-    case Call::KEYED_PROPERTY_CALL: {
+    case Call::KEYED_PROPERTY_CALL:
+    case Call::PRIVATE_CALL: {
       Property* property = callee_expr->AsProperty();
       VisitAndPushIntoRegisterList(property->obj(), &args);
       VisitPropertyLoadForRegister(args.last_register(), property, callee);
@@ -4678,6 +4766,7 @@ void BytecodeGenerator::VisitDelete(UnaryOperation* unary) {
     // Delete of an object property is allowed both in sloppy
     // and strict modes.
     Property* property = expr->AsProperty();
+    DCHECK(!property->IsPrivateReference());
     Register object = VisitForRegisterValue(property->obj());
     VisitForAccumulatorValue(property->key());
     builder()->Delete(object, language_mode());
@@ -4785,6 +4874,11 @@ void BytecodeGenerator::VisitCountOperation(CountOperation* expr) {
       builder()->CallRuntime(Runtime::kLoadKeyedFromSuper, load_super_args);
       break;
     }
+    case PRIVATE_METHOD: {
+      BuildThrowPrivateMethodWriteError(
+          property->key()->AsVariableProxy()->raw_name());
+      break;
+    }
   }
 
   // Save result for postfix expressions.
@@ -4851,6 +4945,11 @@ void BytecodeGenerator::VisitCountOperation(CountOperation* expr) {
           .CallRuntime(Runtime::kStoreKeyedToSuper, super_property_args);
       break;
     }
+    case PRIVATE_METHOD: {
+      BuildThrowPrivateMethodWriteError(
+          property->key()->AsVariableProxy()->raw_name());
+      break;
+    }
   }
 
   // Restore old value for postfix expressions.
diff --git a/deps/v8/src/interpreter/bytecode-generator.h b/deps/v8/src/interpreter/bytecode-generator.h
index dda8b15c80..b754d2c296 100644
--- a/deps/v8/src/interpreter/bytecode-generator.h
+++ b/deps/v8/src/interpreter/bytecode-generator.h
@@ -84,6 +84,8 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
                                            Register object,
                                            const AstRawString* name);
     static AssignmentLhsData KeyedProperty(Register object, Register key);
+    static AssignmentLhsData PrivateMethod(Register object,
+                                           const AstRawString* name);
     static AssignmentLhsData NamedSuperProperty(
         RegisterList super_property_args);
     static AssignmentLhsData KeyedSuperProperty(
@@ -99,15 +101,16 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
       return object_expr_;
     }
     Register object() const {
-      DCHECK(assign_type_ == NAMED_PROPERTY || assign_type_ == KEYED_PROPERTY);
+      DCHECK(assign_type_ == NAMED_PROPERTY || assign_type_ == KEYED_PROPERTY ||
+             assign_type_ == PRIVATE_METHOD);
       return object_;
     }
     Register key() const {
-      DCHECK_EQ(assign_type_, KEYED_PROPERTY);
+      DCHECK(assign_type_ == KEYED_PROPERTY);
       return key_;
     }
     const AstRawString* name() const {
-      DCHECK_EQ(assign_type_, NAMED_PROPERTY);
+      DCHECK(assign_type_ == NAMED_PROPERTY || assign_type_ == PRIVATE_METHOD);
       return name_;
     }
     RegisterList super_property_args() const {
@@ -135,7 +138,7 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
     //
     // NON_PROPERTY: expr
     // NAMED_PROPERTY: object_expr, object, name
-    // KEYED_PROPERTY: object, key
+    // KEYED_PROPERTY, PRIVATE_METHOD: object, key
     // NAMED_SUPER_PROPERTY: super_property_args
     // KEYED_SUPER_PROPERT:  super_property_args
     Expression* expr_;
@@ -238,8 +241,9 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
 
   // Build jump to targets[value], where
   // start_index <= value < start_index + size.
-  void BuildIndexedJump(Register value, size_t start_index, size_t size,
-                        ZoneVector<BytecodeLabel>& targets);
+  void BuildIndexedJump(
+      Register value, size_t start_index, size_t size,
+      ZoneVector<BytecodeLabel>& targets);  // NOLINT(runtime/references)
 
   void BuildNewLocalActivationContext();
   void BuildLocalActivationContextInitialization();
@@ -291,6 +295,7 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
   void VisitArgumentsObject(Variable* variable);
   void VisitRestArgumentsArray(Variable* rest);
   void VisitCallSuper(Call* call);
+  void BuildThrowPrivateMethodWriteError(const AstRawString* name);
   void BuildPrivateClassMemberNameAssignment(ClassLiteral::Property* property);
   void BuildClassLiteral(ClassLiteral* expr, Register name);
   void VisitClassLiteral(ClassLiteral* expr, Register name);
diff --git a/deps/v8/src/interpreter/handler-table-builder.h b/deps/v8/src/interpreter/handler-table-builder.h
index db7ed750dd..66b8d1f937 100644
--- a/deps/v8/src/interpreter/handler-table-builder.h
+++ b/deps/v8/src/interpreter/handler-table-builder.h
@@ -5,9 +5,10 @@
 #ifndef V8_INTERPRETER_HANDLER_TABLE_BUILDER_H_
 #define V8_INTERPRETER_HANDLER_TABLE_BUILDER_H_
 
-#include "src/execution/frames.h"
+#include "src/codegen/handler-table.h"
 #include "src/interpreter/bytecode-register.h"
 #include "src/interpreter/bytecodes.h"
+#include "src/objects/fixed-array.h"
 #include "src/zone/zone-containers.h"
 
 namespace v8 {
diff --git a/deps/v8/src/interpreter/interpreter-assembler.cc b/deps/v8/src/interpreter/interpreter-assembler.cc
index 0af58b674f..7291ea1c35 100644
--- a/deps/v8/src/interpreter/interpreter-assembler.cc
+++ b/deps/v8/src/interpreter/interpreter-assembler.cc
@@ -1265,7 +1265,7 @@ void InterpreterAssembler::UpdateInterruptBudget(Node* weight, bool backward) {
 
   // Make sure we include the current bytecode in the budget calculation.
   TNode<Int32T> budget_after_bytecode =
-      Signed(Int32Sub(old_budget, Int32Constant(CurrentBytecodeSize())));
+      Int32Sub(old_budget, Int32Constant(CurrentBytecodeSize()));
 
   Label done(this);
   TVARIABLE(Int32T, new_budget);
@@ -1501,9 +1501,9 @@ void InterpreterAssembler::UpdateInterruptBudgetOnReturn() {
   UpdateInterruptBudget(profiling_weight, true);
 }
 
-Node* InterpreterAssembler::LoadOSRNestingLevel() {
+Node* InterpreterAssembler::LoadOsrNestingLevel() {
   return LoadObjectField(BytecodeArrayTaggedPointer(),
-                         BytecodeArray::kOSRNestingLevelOffset,
+                         BytecodeArray::kOsrNestingLevelOffset,
                          MachineType::Int8());
 }
 
diff --git a/deps/v8/src/interpreter/interpreter-assembler.h b/deps/v8/src/interpreter/interpreter-assembler.h
index db4523b744..a135eaacdd 100644
--- a/deps/v8/src/interpreter/interpreter-assembler.h
+++ b/deps/v8/src/interpreter/interpreter-assembler.h
@@ -237,7 +237,7 @@ class V8_EXPORT_PRIVATE InterpreterAssembler : public CodeStubAssembler {
   void UpdateInterruptBudgetOnReturn();
 
   // Returns the OSR nesting level from the bytecode header.
-  compiler::Node* LoadOSRNestingLevel();
+  compiler::Node* LoadOsrNestingLevel();
 
   // Dispatch to the bytecode.
   compiler::Node* Dispatch();
diff --git a/deps/v8/src/interpreter/interpreter-generator.cc b/deps/v8/src/interpreter/interpreter-generator.cc
index 852aae4482..00ce8eaf68 100644
--- a/deps/v8/src/interpreter/interpreter-generator.cc
+++ b/deps/v8/src/interpreter/interpreter-generator.cc
@@ -21,9 +21,9 @@
 #include "src/interpreter/interpreter-intrinsics-generator.h"
 #include "src/objects/cell.h"
 #include "src/objects/js-generator.h"
-#include "src/objects/module.h"
 #include "src/objects/objects-inl.h"
 #include "src/objects/oddball.h"
+#include "src/objects/source-text-module.h"
 #include "src/utils/ostreams.h"
 
 namespace v8 {
@@ -512,17 +512,18 @@ IGNITION_HANDLER(LdaNamedProperty, InterpreterAssembler) {
   // Load receiver.
   Node* recv = LoadRegisterAtOperandIndex(0);
 
-  // Load the name.
-  // TODO(jgruber): Not needed for monomorphic smi handler constant/field case.
-  Node* name = LoadConstantPoolEntryAtOperandIndex(1);
-  Node* context = GetContext();
+  // Load the name and context lazily.
+  LazyNode<Name> name = [=] {
+    return CAST(LoadConstantPoolEntryAtOperandIndex(1));
+  };
+  LazyNode<Context> context = [=] { return CAST(GetContext()); };
 
   Label done(this);
   Variable var_result(this, MachineRepresentation::kTagged);
   ExitPoint exit_point(this, &done, &var_result);
 
-  AccessorAssembler::LoadICParameters params(context, recv, name, smi_slot,
-                                             feedback_vector);
+  AccessorAssembler::LazyLoadICParameters params(context, recv, name, smi_slot,
+                                                 feedback_vector);
   AccessorAssembler accessor_asm(state());
   accessor_asm.LoadIC_BytecodeHandler(&params, &exit_point);
 
@@ -735,7 +736,7 @@ IGNITION_HANDLER(LdaModuleVariable, InterpreterAssembler) {
   BIND(&if_export);
   {
     TNode<FixedArray> regular_exports =
-        CAST(LoadObjectField(module, Module::kRegularExportsOffset));
+        CAST(LoadObjectField(module, SourceTextModule::kRegularExportsOffset));
     // The actual array index is (cell_index - 1).
     Node* export_index = IntPtrSub(cell_index, IntPtrConstant(1));
     Node* cell = LoadFixedArrayElement(regular_exports, export_index);
@@ -746,7 +747,7 @@ IGNITION_HANDLER(LdaModuleVariable, InterpreterAssembler) {
   BIND(&if_import);
   {
     TNode<FixedArray> regular_imports =
-        CAST(LoadObjectField(module, Module::kRegularImportsOffset));
+        CAST(LoadObjectField(module, SourceTextModule::kRegularImportsOffset));
     // The actual array index is (-cell_index - 1).
     Node* import_index = IntPtrSub(IntPtrConstant(-1), cell_index);
     Node* cell = LoadFixedArrayElement(regular_imports, import_index);
@@ -777,7 +778,7 @@ IGNITION_HANDLER(StaModuleVariable, InterpreterAssembler) {
   BIND(&if_export);
   {
     TNode<FixedArray> regular_exports =
-        CAST(LoadObjectField(module, Module::kRegularExportsOffset));
+        CAST(LoadObjectField(module, SourceTextModule::kRegularExportsOffset));
     // The actual array index is (cell_index - 1).
     Node* export_index = IntPtrSub(cell_index, IntPtrConstant(1));
     Node* cell = LoadFixedArrayElement(regular_exports, export_index);
@@ -2336,7 +2337,7 @@ IGNITION_HANDLER(JumpIfJSReceiverConstant, InterpreterAssembler) {
 IGNITION_HANDLER(JumpLoop, InterpreterAssembler) {
   Node* relative_jump = BytecodeOperandUImmWord(0);
   Node* loop_depth = BytecodeOperandImm(1);
-  Node* osr_level = LoadOSRNestingLevel();
+  Node* osr_level = LoadOsrNestingLevel();
 
   // Check if OSR points at the given {loop_depth} are armed by comparing it to
   // the current {osr_level} loaded from the header of the BytecodeArray.
diff --git a/deps/v8/src/interpreter/interpreter-intrinsics-generator.cc b/deps/v8/src/interpreter/interpreter-intrinsics-generator.cc
index 19d17baa52..d581802340 100644
--- a/deps/v8/src/interpreter/interpreter-intrinsics-generator.cc
+++ b/deps/v8/src/interpreter/interpreter-intrinsics-generator.cc
@@ -12,9 +12,9 @@
 #include "src/interpreter/interpreter-assembler.h"
 #include "src/interpreter/interpreter-intrinsics.h"
 #include "src/objects/js-generator.h"
-#include "src/objects/module.h"
-#include "src/utils/allocation.h"
 #include "src/objects/objects-inl.h"
+#include "src/objects/source-text-module.h"
+#include "src/utils/allocation.h"
 
 namespace v8 {
 namespace internal {
@@ -324,7 +324,7 @@ Node* IntrinsicsGenerator::GetImportMetaObject(
   Node* const module =
       __ LoadContextElement(module_context, Context::EXTENSION_INDEX);
   Node* const import_meta =
-      __ LoadObjectField(module, Module::kImportMetaOffset);
+      __ LoadObjectField(module, SourceTextModule::kImportMetaOffset);
 
   InterpreterAssembler::Variable return_value(assembler_,
                                               MachineRepresentation::kTagged);
diff --git a/deps/v8/src/interpreter/interpreter.cc b/deps/v8/src/interpreter/interpreter.cc
index 9e06d95fde..eb91ae06a4 100644
--- a/deps/v8/src/interpreter/interpreter.cc
+++ b/deps/v8/src/interpreter/interpreter.cc
@@ -112,7 +112,7 @@ void Interpreter::IterateDispatchTable(RootVisitor* v) {
       CHECK(code_entry == kNullAddress ||
             InstructionStream::PcIsOffHeap(isolate_, code_entry));
     }
-#endif  // ENABLE_SLOW_DCHECKS
+#endif  // DEBUG
     return;
   }
 
@@ -230,12 +230,12 @@ InterpreterCompilationJob::Status InterpreterCompilationJob::FinalizeJobImpl(
   return SUCCEEDED;
 }
 
-UnoptimizedCompilationJob* Interpreter::NewCompilationJob(
+std::unique_ptr<UnoptimizedCompilationJob> Interpreter::NewCompilationJob(
     ParseInfo* parse_info, FunctionLiteral* literal,
     AccountingAllocator* allocator,
     std::vector<FunctionLiteral*>* eager_inner_literals) {
-  return new InterpreterCompilationJob(parse_info, literal, allocator,
-                                       eager_inner_literals);
+  return base::make_unique<InterpreterCompilationJob>(
+      parse_info, literal, allocator, eager_inner_literals);
 }
 
 void Interpreter::ForEachBytecode(
@@ -290,14 +290,9 @@ bool Interpreter::IsDispatchTableInitialized() const {
 }
 
 const char* Interpreter::LookupNameOfBytecodeHandler(const Code code) {
-#ifdef ENABLE_DISASSEMBLER
-#define RETURN_NAME(Name, ...)                                                 \
-  if (dispatch_table_[Bytecodes::ToByte(Bytecode::k##Name)] == code.entry()) { \
-    return #Name;                                                              \
+  if (code.kind() == Code::BYTECODE_HANDLER) {
+    return Builtins::name(code.builtin_index());
   }
-  BYTECODE_LIST(RETURN_NAME)
-#undef RETURN_NAME
-#endif  // ENABLE_DISASSEMBLER
   return nullptr;
 }
 
diff --git a/deps/v8/src/interpreter/interpreter.h b/deps/v8/src/interpreter/interpreter.h
index 8c6216b6a6..e8c494a6ce 100644
--- a/deps/v8/src/interpreter/interpreter.h
+++ b/deps/v8/src/interpreter/interpreter.h
@@ -43,7 +43,7 @@ class Interpreter {
   // Creates a compilation job which will generate bytecode for |literal|.
   // Additionally, if |eager_inner_literals| is not null, adds any eagerly
   // compilable inner FunctionLiterals to this list.
-  static UnoptimizedCompilationJob* NewCompilationJob(
+  static std::unique_ptr<UnoptimizedCompilationJob> NewCompilationJob(
       ParseInfo* parse_info, FunctionLiteral* literal,
       AccountingAllocator* allocator,
       std::vector<FunctionLiteral*>* eager_inner_literals);
@@ -60,8 +60,8 @@ class Interpreter {
   // GC support.
   void IterateDispatchTable(RootVisitor* v);
 
-  // Disassembler support (only useful with ENABLE_DISASSEMBLER defined).
-  const char* LookupNameOfBytecodeHandler(const Code code);
+  // Disassembler support.
+  V8_EXPORT_PRIVATE const char* LookupNameOfBytecodeHandler(const Code code);
 
   V8_EXPORT_PRIVATE Local<v8::Object> GetDispatchCountersObject();