[runtime] Force internalize names used before lookup in in DescriptorArray and TransitionArray

src/heap/heap-inl.h

 // 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.
 
 #ifndef V8_HEAP_HEAP_INL_H_
 #define V8_HEAP_HEAP_INL_H_
 
 #include <cmath>
 
 #include "src/base/platform/platform.h"
@@ skipping 604 matching lines @@
 
 void Heap::ExternalStringTable::ShrinkNewStrings(int position) {
   new_space_strings_.Rewind(position);
 #ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     Verify();
   }
 #endif
 }
 
+// static
+int DescriptorLookupCache::Hash(Object* source, Name* name) {
+  DCHECK(name->IsUniqueName());
+  // Uses only lower 32 bits if pointers are larger.
+  uint32_t source_hash =
+      static_cast<uint32_t>(reinterpret_cast<uintptr_t>(source)) >>
+      kPointerSizeLog2;
+  uint32_t name_hash = name->hash_field();
+  return (source_hash ^ name_hash) % kLength;
+}
 
 int DescriptorLookupCache::Lookup(Map* source, Name* name) {
-  if (!name->IsUniqueName()) return kAbsent;
   int index = Hash(source, name);
   Key& key = keys_[index];
   if ((key.source == source) && (key.name == name)) return results_[index];
   return kAbsent;
 }
 
 
 void DescriptorLookupCache::Update(Map* source, Name* name, int result) {
   DCHECK(result != kAbsent);
-  if (name->IsUniqueName()) {
-    int index = Hash(source, name);
-    Key& key = keys_[index];
-    key.source = source;
-    key.name = name;
-    results_[index] = result;
-  }
+  int index = Hash(source, name);
+  Key& key = keys_[index];
+  key.source = source;
+  key.name = name;
+  results_[index] = result;
 }
 
 
 void Heap::ClearInstanceofCache() {
   set_instanceof_cache_function(Smi::FromInt(0));
 }
 
 
 Object* Heap::ToBoolean(bool condition) {
   return condition ? true_value() : false_value();
@@ skipping 73 matching lines @@
 
 void VerifySmisVisitor::VisitPointers(Object** start, Object** end) {
   for (Object** current = start; current < end; current++) {
     CHECK((*current)->IsSmi());
   }
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_INL_H_