Add new FrameArray type

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 691 matching lines @@
 TYPE_CHECKER(TransitionArray, TRANSITION_ARRAY_TYPE)
 
 bool HeapObject::IsJSWeakCollection() const {
   return IsJSWeakMap() || IsJSWeakSet();
 }
 
 bool HeapObject::IsJSCollection() const { return IsJSMap() || IsJSSet(); }
 
 bool HeapObject::IsDescriptorArray() const { return IsFixedArray(); }
 
+bool HeapObject::IsFrameArray() const { return IsFixedArray(); }
+
 bool HeapObject::IsArrayList() const { return IsFixedArray(); }
 
 bool Object::IsLayoutDescriptor() const {
   return IsSmi() || IsFixedTypedArrayBase();
 }
 
 bool HeapObject::IsTypeFeedbackVector() const { return IsFixedArray(); }
 
 bool HeapObject::IsTypeFeedbackMetadata() const { return IsFixedArray(); }
 
@@ skipping 1881 matching lines @@
 
 Object** FixedArray::data_start() {
   return HeapObject::RawField(this, kHeaderSize);
 }
 
 
 Object** FixedArray::RawFieldOfElementAt(int index) {
   return HeapObject::RawField(this, OffsetOfElementAt(index));
 }
 
+#define DEFINE_FRAME_ARRAY_ACCESSORS(name, type)                           \
+  type* FrameArray::name(int frame_ix) const {                             \
+    Object* obj = get(1 + frame_ix * kElementsPerFrame + k##name##Offset); \
+    return type::cast(obj);                                                \
+  }                                                                        \
+                                                                           \
+  void FrameArray::Set##name(int frame_ix, type* value) {                  \
+    set(1 + frame_ix * kElementsPerFrame + k##name##Offset, value);        \
+  }
+FRAME_ARRAY_FIELD_LIST(DEFINE_FRAME_ARRAY_ACCESSORS)
+#undef DEFINE_FRAME_ARRAY_ACCESSORS
+
+bool FrameArray::IsWasmFrame(int frame_ix) const {
+  Object* obj =
+      get(1 + frame_ix * kElementsPerFrame + kWasmFunctionIndexOffset);
+  return obj->IsSmi();
+}
+
+int FrameArray::FrameCount() const {
+  DCHECK_EQ(1, length() % kElementsPerFrame);
+  return (length() - 1) / kElementsPerFrame;
+}
 
 bool DescriptorArray::IsEmpty() {
   DCHECK(length() >= kFirstIndex ||
          this == GetHeap()->empty_descriptor_array());
   return length() < kFirstIndex;
 }
 
 
 int DescriptorArray::number_of_descriptors() {
   DCHECK(length() >= kFirstIndex || IsEmpty());
@@ skipping 593 matching lines @@
 CAST_ACCESSOR(DescriptorArray)
 CAST_ACCESSOR(ExternalOneByteString)
 CAST_ACCESSOR(ExternalString)
 CAST_ACCESSOR(ExternalTwoByteString)
 CAST_ACCESSOR(FixedArray)
 CAST_ACCESSOR(FixedArrayBase)
 CAST_ACCESSOR(FixedDoubleArray)
 CAST_ACCESSOR(FixedTypedArrayBase)
 CAST_ACCESSOR(Float32x4)
 CAST_ACCESSOR(Foreign)
+CAST_ACCESSOR(FrameArray)
 CAST_ACCESSOR(GlobalDictionary)
 CAST_ACCESSOR(HandlerTable)
 CAST_ACCESSOR(HeapObject)
 CAST_ACCESSOR(Int16x8)
 CAST_ACCESSOR(Int32x4)
 CAST_ACCESSOR(Int8x16)
 CAST_ACCESSOR(JSArray)
 CAST_ACCESSOR(JSArrayBuffer)
 CAST_ACCESSOR(JSArrayBufferView)
 CAST_ACCESSOR(JSBoundFunction)
@@ skipping 4983 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_