Reland of "Store SharedFunctionInfos of a Script in a FixedArray indexed by their ID"

src/heap/object-stats.cc

 // Copyright 2015 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/heap/object-stats.h"
 
 #include "src/compilation-cache.h"
 #include "src/counters.h"
 #include "src/heap/heap-inl.h"
 #include "src/isolate.h"
@@ skipping 423 matching lines @@
     RecordFixedArrayHelper(nullptr, FixedArray::cast(JSMap::cast(obj)->table()),
                            JS_COLLECTION_SUB_TYPE, 0);
   }
   if (obj->IsJSSet()) {
     RecordFixedArrayHelper(nullptr, FixedArray::cast(JSSet::cast(obj)->table()),
                            JS_COLLECTION_SUB_TYPE, 0);
   }
 }
 
 void ObjectStatsCollector::RecordScriptDetails(Script* obj) {
-  Object* infos = WeakFixedArray::cast(obj->shared_function_infos());
-  if (infos->IsWeakFixedArray())
-    RecordFixedArrayHelper(obj, WeakFixedArray::cast(infos),
-                           SHARED_FUNCTION_INFOS_SUB_TYPE, 0);
+  FixedArray* infos = FixedArray::cast(obj->shared_function_infos());
+  RecordFixedArrayHelper(obj, infos, SHARED_FUNCTION_INFOS_SUB_TYPE, 0);
 }
 
 void ObjectStatsCollector::RecordMapDetails(Map* map_obj) {
   DescriptorArray* array = map_obj->instance_descriptors();
   if (map_obj->owns_descriptors() && array != heap_->empty_descriptor_array() &&
       SameLiveness(map_obj, array)) {
     RecordFixedArrayHelper(map_obj, array, DESCRIPTOR_ARRAY_SUB_TYPE, 0);
     if (array->HasEnumCache()) {
       RecordFixedArrayHelper(array, array->GetEnumCache(), ENUM_CACHE_SUB_TYPE,
                              0);
@@ skipping 140 matching lines @@
                           SLOW_TEMPLATE_INSTANTIATIONS_CACHE_SUB_TYPE);
     FixedArray* fast_cache = native_ctx->fast_template_instantiations_cache();
     stats_->RecordFixedArraySubTypeStats(
         fast_cache, FAST_TEMPLATE_INSTANTIATIONS_CACHE_SUB_TYPE,
         fast_cache->Size(), 0);
   }
 }
 
 }  // namespace internal
 }  // namespace v8