Concurrent/parallel precise sweeping.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 5c7cbcacd3d4c3e028b347ae9cd42e1d79b825b2..fec0ac0a099ce56ef6d06602349e0755ec6b3add 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -1301,7 +1301,7 @@ static void VerifyNonPointerSpacePointers(Heap* heap) {
 
   // The old data space was normally swept conservatively so that the iterator
   // doesn't work, so we normally skip the next bit.
-  if (heap->old_data_space()->is_iterable()) {
+  if (heap->old_data_space()->swept_precisely()) {
     HeapObjectIterator data_it(heap->old_data_space());
     for (HeapObject* object = data_it.Next();
          object != NULL; object = data_it.Next())
@@ -3312,8 +3312,7 @@ bool Heap::CanMoveObjectStart(HeapObject* object) {
   // pages is set after sweeping all pages.
   return (!is_in_old_pointer_space && !is_in_old_data_space) ||
          page->WasSwept() ||
-         (page->parallel_sweeping() <=
-             MemoryChunk::PARALLEL_SWEEPING_FINALIZE);
+         (page->parallel_sweeping() <= MemoryChunk::SWEEPING_FINALIZE);
 }
 
 
@@ -4217,8 +4216,8 @@ STRUCT_LIST(MAKE_CASE)
 
 
 bool Heap::IsHeapIterable() {
-  return (old_pointer_space()->is_iterable() &&
-          old_data_space()->is_iterable() &&
+  return (old_pointer_space()->swept_precisely() &&
+          old_data_space()->swept_precisely() &&
           new_space_top_after_last_gc_ == new_space()->top());
 }