[heap] Add optimized RecordWrites

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index aaf657e5f8a05583b7506daaa9ccab4f50f85fcf..9078a04e9f68b6ba18566d0bff356f25099f72db 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -1148,6 +1148,10 @@ MaybeHandle<Object> JSReceiver::GetProperty(Isolate* isolate,
       object, HeapObject::RawField(object, offset), value); \
   heap->RecordWrite(object, offset, value);
 
+#define FIXED_ARRAY_WRITE_BARRIER(heap, array, start, length) \

[Hannes Payer (out of office), 2016/04/01 11:34:40]

FIXED_ARRAY_ELEMENTS_WRITE_BARRIER

[Camillo Bruni, 2016/04/01 13:45:02]

done.

+  heap->RecordWrites(array, start, length);                   \

[ulan, 2016/04/01 11:28:32]

Let's put the two statements in

do {

} while (false)

so that they do not get separated at macro usage site.

[Camillo Bruni, 2016/04/01 13:45:02]

done.

+  heap->incremental_marking()->IterateBlackObject(array)
+
 #define CONDITIONAL_WRITE_BARRIER(heap, object, offset, value, mode) \
   if (mode != SKIP_WRITE_BARRIER) {                                  \
     if (mode == UPDATE_WRITE_BARRIER) {                              \