introduce eternal handles

src/heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 996 matching lines @@
 
   gc_post_processing_depth_++;
   { AllowHeapAllocation allow_allocation;
     GCTracer::Scope scope(tracer, GCTracer::Scope::EXTERNAL);
     next_gc_likely_to_collect_more =
         isolate_->global_handles()->PostGarbageCollectionProcessing(
             collector, tracer);
   }
   gc_post_processing_depth_--;
 
+  isolate_->eternal_handles()->PostGarbageCollectionProcessing(this);
+
   // Update relocatables.
   Relocatable::PostGarbageCollectionProcessing();
 
   if (collector == MARK_COMPACTOR) {
     // Register the amount of external allocated memory.
     amount_of_external_allocated_memory_at_last_global_gc_ =
         amount_of_external_allocated_memory_;
   }
 
   {
@@ skipping 2179 matching lines @@
     if (!maybe_obj->ToObject(&obj)) return false;
   }
   SeededNumberDictionary::cast(obj)->set_requires_slow_elements();
   set_empty_slow_element_dictionary(SeededNumberDictionary::cast(obj));
 
   { MaybeObject* maybe_obj = AllocateSymbol();
     if (!maybe_obj->ToObject(&obj)) return false;
   }
   set_observed_symbol(Symbol::cast(obj));
 
-  set_i18n_template_one(the_hole_value());
-  set_i18n_template_two(the_hole_value());
-
   // Handling of script id generation is in Factory::NewScript.
   set_last_script_id(Smi::FromInt(v8::Script::kNoScriptId));
 
   // Initialize keyed lookup cache.
   isolate_->keyed_lookup_cache()->Clear();
 
   // Initialize context slot cache.
   isolate_->context_slot_cache()->Clear();
 
   // Initialize descriptor cache.
@@ skipping 3367 matching lines @@
     case VISIT_ALL_IN_SCAVENGE:
       isolate_->global_handles()->IterateNewSpaceStrongAndDependentRoots(v);
       break;
     case VISIT_ALL_IN_SWEEP_NEWSPACE:
     case VISIT_ALL:
       isolate_->global_handles()->IterateAllRoots(v);
       break;
   }
   v->Synchronize(VisitorSynchronization::kGlobalHandles);
 
+  // Iterate over eternal handles.
+  if (mode == VISIT_ALL_IN_SCAVENGE) {
+    isolate_->eternal_handles()->IterateNewSpaceRoots(v);
+  } else {
+    isolate_->eternal_handles()->IterateAllRoots(v);
+  }
+  v->Synchronize(VisitorSynchronization::kEternalHandles);
+
   // Iterate over pointers being held by inactive threads.
   isolate_->thread_manager()->Iterate(v);
   v->Synchronize(VisitorSynchronization::kThreadManager);
 
   // Iterate over the pointers the Serialization/Deserialization code is
   // holding.
   // During garbage collection this keeps the partial snapshot cache alive.
   // During deserialization of the startup snapshot this creates the partial
   // snapshot cache and deserializes the objects it refers to.  During
   // serialization this does nothing, since the partial snapshot cache is
@@ skipping 1415 matching lines @@
   if (FLAG_parallel_recompilation) {
     heap_->relocation_mutex_->Lock();
 #ifdef DEBUG
     heap_->relocation_mutex_locked_by_optimizer_thread_ =
         heap_->isolate()->optimizing_compiler_thread()->IsOptimizerThread();
 #endif  // DEBUG
   }
 }
 
 } }  // namespace v8::internal