[heap] Fine-grained JSArrayBuffer tracking

test/cctest/heap/utils-inl.h

Index: test/cctest/heap/utils-inl.h
diff --git a/test/cctest/heap/utils-inl.h b/test/cctest/heap/utils-inl.h
index 0e943b4197538bccb7bd79c14c0bcd352a512177..e389c1485f9112e2a513cd31756546b0c5c07638 100644
--- a/test/cctest/heap/utils-inl.h
+++ b/test/cctest/heap/utils-inl.h
@@ -142,6 +142,21 @@ static inline void SimulateIncrementalMarking(i::Heap* heap,
   CHECK(marking->IsComplete());
 }
 
+static inline void AbandonCurrentlyFreeMemory(PagedSpace* space) {
+  space->EmptyAllocationInfo();
+  PageIterator pit(space);
+  while (pit.has_next()) {
+    pit.next()->MarkNeverAllocateForTesting();
+  }
+}
+
+static inline void GcAndSweep(Heap* heap, AllocationSpace space) {

[Hannes Payer (out of office), 2016/05/11 11:12:34]

Why don't we make it a CollectGarbage mode that finalizes sweeping in the atomic
pause? That comes in handy for many test cases.

[Michael Lippautz, 2016/05/11 18:43:26]

Good idea! Fine to do it in a follow up? It requires some massaging of
CollectGarbage since we probably want to specify this on the CollectGarbage call
that takes a space. I suppose this will change quite some call sites.

+  heap->CollectGarbage(space);
+  if (heap->mark_compact_collector()->sweeping_in_progress()) {
+    heap->mark_compact_collector()->EnsureSweepingCompleted();
+  }
+}
+
 }  // namespace internal
 }  // namespace v8