Weak Cells

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 4e6a17f1eec1474dddd385bf47e12ea744c1b963..6385c587c5837b635ce1fc2fbd5f062bb5011d41 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -786,6 +786,7 @@ TYPE_CHECKER(Code, CODE_TYPE)
 TYPE_CHECKER(Oddball, ODDBALL_TYPE)
 TYPE_CHECKER(Cell, CELL_TYPE)
 TYPE_CHECKER(PropertyCell, PROPERTY_CELL_TYPE)
+TYPE_CHECKER(WeakCell, WEAK_CELL_TYPE)
 TYPE_CHECKER(SharedFunctionInfo, SHARED_FUNCTION_INFO_TYPE)
 TYPE_CHECKER(JSGeneratorObject, JS_GENERATOR_OBJECT_TYPE)
 TYPE_CHECKER(JSModule, JS_MODULE_TYPE)
@@ -1929,6 +1930,33 @@ void PropertyCell::set_type_raw(Object* val, WriteBarrierMode ignored) {
 }
 
 
+HeapObject* WeakCell::value() const {
+  return HeapObject::cast(READ_FIELD(this, kValueOffset));
+}
+
+
+void WeakCell::clear(HeapObject* undefined) {
+  WRITE_FIELD(this, kValueOffset, undefined);
+}
+
+
+void WeakCell::initialize(HeapObject* val) {
+  WRITE_FIELD(this, kValueOffset, val);
+  WRITE_BARRIER(GetHeap(), this, kValueOffset, val);
+}
+
+
+Object* WeakCell::next() const { return READ_FIELD(this, kNextOffset); }
+
+
+void WeakCell::set_next(Object* val, WriteBarrierMode mode) {
+  WRITE_FIELD(this, kNextOffset, val);
+  if (mode == UPDATE_WRITE_BARRIER) {
+    WRITE_BARRIER(GetHeap(), this, kNextOffset, val);
+  }
+}
+
+
 int JSObject::GetHeaderSize() {
   InstanceType type = map()->instance_type();
   // Check for the most common kind of JavaScript object before
@@ -3253,6 +3281,7 @@ CAST_ACCESSOR(StringTable)
 CAST_ACCESSOR(Struct)
 CAST_ACCESSOR(Symbol)
 CAST_ACCESSOR(UnseededNumberDictionary)
+CAST_ACCESSOR(WeakCell)
 CAST_ACCESSOR(WeakHashTable)