Recording array buffer views.

src/objects-visiting-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 131 matching lines @@
                   void>::Visit);
 
   table_.Register(kVisitMap, &VisitMap);
 
   table_.Register(kVisitCode, &VisitCode);
 
   table_.Register(kVisitSharedFunctionInfo, &VisitSharedFunctionInfo);
 
   table_.Register(kVisitJSFunction, &VisitJSFunction);
 
+  table_.Register(kVisitJSArrayBuffer, &VisitJSArrayBuffer);
+
+  table_.Register(kVisitJSTypedArray, &VisitJSTypedArray);
+
+
   // Registration for kVisitJSRegExp is done by StaticVisitor.
 
   table_.Register(kVisitPropertyCell,
                   &FixedBodyVisitor<StaticVisitor,
                   JSGlobalPropertyCell::BodyDescriptor,
                   void>::Visit);
 
   table_.template RegisterSpecializations<DataObjectVisitor,
                                           kVisitDataObject,
                                           kVisitDataObjectGeneric>();
@@ skipping 232 matching lines @@
     Map* map, HeapObject* object) {
   int last_property_offset =
       JSRegExp::kSize + kPointerSize * map->inobject_properties();
   StaticVisitor::VisitPointers(map->GetHeap(),
       HeapObject::RawField(object, JSRegExp::kPropertiesOffset),
       HeapObject::RawField(object, last_property_offset));
 }
 
 
 template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::VisitJSArrayBuffer(
+    Map* map, HeapObject* object) {
+  Heap* heap = map->GetHeap();
+  JSArrayBuffer* array_buffer = JSArrayBuffer::cast(object);
+  MarkCompactCollector* collector = heap->mark_compact_collector();
+  if (array_buffer->next() == Smi::FromInt(0)) {

[Michael Starzinger, 2013/05/21 15:48:04]

This might cause an array buffer to be enqueued twice if it is at the end of the
list , because the list-end sentinel is also Smi(0).

+    array_buffer->set_next(collector->encountered_array_buffers());
+    collector->set_encountered_array_buffers(array_buffer);
+  }
+
+  int object_size = JSArrayBuffer::BodyDescriptor::SizeOf(map, object);
+  StaticVisitor::VisitPointers(
+      heap,
+      HeapObject::RawField(object, JSArrayBuffer::BodyDescriptor::kStartOffset),
+      HeapObject::RawField(object, JSArrayBuffer::kFirstArrayOffset));
+  StaticVisitor::VisitPointers(
+      heap,
+      HeapObject::RawField(object, JSArrayBuffer::kFirstArrayOffset + kPointerSize),
+      HeapObject::RawField(object, object_size));
+}
+
+template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::VisitJSTypedArray(
+    Map* map, HeapObject* object) {
+  int object_size = JSTypedArray::BodyDescriptor::SizeOf(map, object);
+  StaticVisitor::VisitPointers(
+      map->GetHeap(),
+      HeapObject::RawField(object, JSTypedArray::BodyDescriptor::kStartOffset),
+      HeapObject::RawField(object, JSTypedArray::kNextOffset));
+  StaticVisitor::VisitPointers(
+      map->GetHeap(),
+      HeapObject::RawField(object, JSTypedArray::kNextOffset + kPointerSize),
+      HeapObject::RawField(object, object_size));
+}
+
+
+template<typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::MarkMapContents(
     Heap* heap, Map* map) {
   // Make sure that the back pointer stored either in the map itself or
   // inside its transitions array is marked. Skip recording the back
   // pointer slot since map space is not compacted.
   StaticVisitor::MarkObject(heap, HeapObject::cast(map->GetBackPointer()));
 
   // Treat pointers in the transitions array as weak and also mark that
   // array to prevent visiting it later. Skip recording the transition
   // array slot, since it will be implicitly recorded when the pointer
@@ skipping 331 matching lines @@
   RelocIterator it(this, mode_mask);
   for (; !it.done(); it.next()) {
     it.rinfo()->template Visit<StaticVisitor>(heap);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_VISITING_INL_H_