[strong] create strong array literals

src/builtins.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/api.h"
 #include "src/api-natives.h"
 #include "src/arguments.h"
 #include "src/base/once.h"
@@ skipping 975 matching lines @@
     if (is_holey) elements_kind = GetHoleyElementsKind(elements_kind);
   }
 
   // If a double array is concatted into a fast elements array, the fast
   // elements array needs to be initialized to contain proper holes, since
   // boxing doubles may cause incremental marking.
   ArrayStorageAllocationMode mode =
       has_double && IsFastObjectElementsKind(elements_kind)
       ? INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE : DONT_INITIALIZE_ARRAY_ELEMENTS;
   Handle<JSArray> result_array =
-      isolate->factory()->NewJSArray(elements_kind,
-                                     result_len,
-                                     result_len,
-                                     mode);
+      isolate->factory()->NewJSArray(elements_kind, result_len, result_len,
+                                     WEAK, mode);
   if (result_len == 0) return *result_array;
 
   int j = 0;
   Handle<FixedArrayBase> storage(result_array->elements(), isolate);
   ElementsAccessor* accessor = ElementsAccessor::ForKind(elements_kind);
   for (int i = 0; i < n_arguments; i++) {
     // It is crucial to keep |array| in a raw pointer form to avoid performance
     // degradation.
     JSArray* array = JSArray::cast(args[i]);
     int len = Smi::cast(array->length())->value();
@@ skipping 655 matching lines @@
 }
 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C)
 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A)
 BUILTIN_LIST_H(DEFINE_BUILTIN_ACCESSOR_H)
 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A)
 #undef DEFINE_BUILTIN_ACCESSOR_C
 #undef DEFINE_BUILTIN_ACCESSOR_A
 
 
 } }  // namespace v8::internal