[objects] do not visit ArrayBuffer's backing store

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 9ddaa81af44ba1df971ae679a90d5c3a50d60f89..481a6f199d006ff79801b16e3237d62f213d76ff 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -6586,6 +6586,32 @@ void JSArrayBuffer::set_is_shared(bool value) {
 }
 
 
+// static
+template <typename StaticVisitor>
+void JSArrayBuffer::BodyDescriptor::IterateBody(Heap* heap, HeapObject* obj) {
+  StaticVisitor::VisitPointers(
+      heap, obj,
+      HeapObject::RawField(obj, JSArrayBuffer::BodyDescriptor::kStartOffset),

[jochen (gone - plz use gerrit), 2015/09/14 10:04:36]

I wouldn't use constants here, just visit the length and the internal fields

[fedor.indutny, 2015/09/14 17:08:16]

Acknowledged.

+      HeapObject::RawField(obj, JSArrayBuffer::kBackingStoreOffset));
+  StaticVisitor::VisitPointers(
+      heap, obj, HeapObject::RawField(
+                     obj, JSArrayBuffer::kBackingStoreOffset + kPointerSize),
+      HeapObject::RawField(obj, JSArrayBuffer::kSizeWithInternalFields));
+}
+
+
+void JSArrayBuffer::BodyDescriptor::IterateBody(HeapObject* obj,
+                                                ObjectVisitor* v) {
+  v->VisitPointers(
+      HeapObject::RawField(obj, JSArrayBuffer::BodyDescriptor::kStartOffset),
+      HeapObject::RawField(obj, JSArrayBuffer::kBackingStoreOffset));
+  v->VisitPointers(
+      HeapObject::RawField(obj,
+                           JSArrayBuffer::kBackingStoreOffset + kPointerSize),
+      HeapObject::RawField(obj, JSArrayBuffer::kSizeWithInternalFields));
+}
+
+
 Object* JSArrayBufferView::byte_offset() const {
   if (WasNeutered()) return Smi::FromInt(0);
   return Object::cast(READ_FIELD(this, kByteOffsetOffset));