Add map-based read barrier to WeakCell

test/cctest/test-heap.cc

Index: test/cctest/test-heap.cc
diff --git a/test/cctest/test-heap.cc b/test/cctest/test-heap.cc
index a64915f0a6d9f4243611f9ab5e9825e4e5520428..66303eaa62a170c307f29f4509a85fd26fe88e9e 100644
--- a/test/cctest/test-heap.cc
+++ b/test/cctest/test-heap.cc
@@ -4710,17 +4710,17 @@ TEST(WeakCell) {
     HandleScope inner_scope(isolate);
     weak_cell2 = inner_scope.CloseAndEscape(factory->NewWeakCell(survivor));
   }
-  CHECK(weak_cell1->value()->IsFixedArray());
-  CHECK_EQ(*survivor, weak_cell2->value());
+  CHECK(weak_cell1->ValueNoReadBarrier()->IsFixedArray());
+  CHECK_EQ(*survivor, weak_cell2->ValueNoReadBarrier());
   heap->CollectGarbage(NEW_SPACE);
-  CHECK(weak_cell1->value()->IsFixedArray());
-  CHECK_EQ(*survivor, weak_cell2->value());
+  CHECK(weak_cell1->ValueNoReadBarrier()->IsFixedArray());
+  CHECK_EQ(*survivor, weak_cell2->ValueNoReadBarrier());
   heap->CollectGarbage(NEW_SPACE);
-  CHECK(weak_cell1->value()->IsFixedArray());
-  CHECK_EQ(*survivor, weak_cell2->value());
+  CHECK(weak_cell1->ValueNoReadBarrier()->IsFixedArray());
+  CHECK_EQ(*survivor, weak_cell2->ValueNoReadBarrier());
   heap->CollectAllAvailableGarbage();
   CHECK(weak_cell1->cleared());
-  CHECK_EQ(*survivor, weak_cell2->value());
+  CHECK_EQ(*survivor, weak_cell2->ValueNoReadBarrier());
 }
 
 
@@ -4740,16 +4740,16 @@ TEST(WeakCellsWithIncrementalMarking) {
     Handle<HeapObject> value =
         i == 0 ? survivor : factory->NewFixedArray(1, NOT_TENURED);
     Handle<WeakCell> weak_cell = factory->NewWeakCell(value);
-    CHECK(weak_cell->value()->IsFixedArray());
+    CHECK(weak_cell->ValueNoReadBarrier()->IsFixedArray());
     IncrementalMarking* marking = heap->incremental_marking();
     if (marking->IsStopped()) marking->Start();
     marking->Step(128, IncrementalMarking::NO_GC_VIA_STACK_GUARD);
     heap->CollectGarbage(NEW_SPACE);
-    CHECK(weak_cell->value()->IsFixedArray());
+    CHECK(weak_cell->ValueNoReadBarrier()->IsFixedArray());
     weak_cells[i] = inner_scope.CloseAndEscape(weak_cell);
   }
   heap->CollectAllGarbage(Heap::kNoGCFlags);
-  CHECK_EQ(*survivor, weak_cells[0]->value());
+  CHECK_EQ(*survivor, weak_cells[0]->ValueNoReadBarrier());
   for (int i = 1; i < N; i++) {
     CHECK(weak_cells[i]->cleared());
   }