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Unified Diff: src/builtins.cc

Issue 29353003: [Object.observe] Don't force normalization of elements for observed objects (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: whitespace Created 7 years, 1 month ago
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Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index 758967ec08d875ce5ccab732d4d120366e6a5079..40772724266dc0277a59da827c77d2dbaa76aefa 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -311,6 +311,7 @@ static inline MaybeObject* EnsureJSArrayWithWritableFastElements(
Heap* heap, Object* receiver, Arguments* args, int first_added_arg) {
if (!receiver->IsJSArray()) return NULL;
JSArray* array = JSArray::cast(receiver);
+ if (array->map()->is_observed()) return NULL;
HeapObject* elms = array->elements();
Map* map = elms->map();
if (map == heap->fixed_array_map()) {
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