Decouple root visitors from object visitors.

src/objects.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/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <memory>
 #include <sstream>
@@ skipping 10642 matching lines @@
   return to + ArchiveSpacePerThread();
 }
 
 
 // Restore statics that are thread-local.
 char* Relocatable::RestoreState(Isolate* isolate, char* from) {
   isolate->set_relocatable_top(*reinterpret_cast<Relocatable**>(from));
   return from + ArchiveSpacePerThread();
 }
 
-
-char* Relocatable::Iterate(ObjectVisitor* v, char* thread_storage) {
+char* Relocatable::Iterate(RootVisitor* v, char* thread_storage) {
   Relocatable* top = *reinterpret_cast<Relocatable**>(thread_storage);
   Iterate(v, top);
   return thread_storage + ArchiveSpacePerThread();
 }
 
-
-void Relocatable::Iterate(Isolate* isolate, ObjectVisitor* v) {
+void Relocatable::Iterate(Isolate* isolate, RootVisitor* v) {
   Iterate(v, isolate->relocatable_top());
 }
 
-
-void Relocatable::Iterate(ObjectVisitor* v, Relocatable* top) {
+void Relocatable::Iterate(RootVisitor* v, Relocatable* top) {
   Relocatable* current = top;
   while (current != NULL) {
     current->IterateInstance(v);
     current = current->prev_;
   }
 }
 
 
 FlatStringReader::FlatStringReader(Isolate* isolate, Handle<String> str)
     : Relocatable(isolate),
@@ skipping 3180 matching lines @@
   if (entry != kNotFound) {
     FixedArray* code_map = optimized_code_map();
     DCHECK_LE(entry + kEntryLength, code_map->length());
     WeakCell* cell = WeakCell::cast(code_map->get(entry + kCachedCodeOffset));
     result = cell->cleared() ? nullptr : Code::cast(cell->value());
   }
   return result;
 }
 
 
-#define DECLARE_TAG(ignore1, name, ignore2) name,
-const char* const VisitorSynchronization::kTags[
-    VisitorSynchronization::kNumberOfSyncTags] = {
-  VISITOR_SYNCHRONIZATION_TAGS_LIST(DECLARE_TAG)
-};
-#undef DECLARE_TAG
-
-
-#define DECLARE_TAG(ignore1, ignore2, name) name,
-const char* const VisitorSynchronization::kTagNames[
-    VisitorSynchronization::kNumberOfSyncTags] = {
-  VISITOR_SYNCHRONIZATION_TAGS_LIST(DECLARE_TAG)
-};
-#undef DECLARE_TAG
-
-
 void ObjectVisitor::VisitCodeTarget(RelocInfo* rinfo) {
   DCHECK(RelocInfo::IsCodeTarget(rinfo->rmode()));
   Object* old_pointer = Code::GetCodeFromTargetAddress(rinfo->target_address());
   Object* new_pointer = old_pointer;
   VisitPointer(&new_pointer);
   DCHECK_EQ(old_pointer, new_pointer);
 }
 
 
 void ObjectVisitor::VisitCodeAgeSequence(RelocInfo* rinfo) {
@@ skipping 6551 matching lines @@
       // depend on this.
       return DICTIONARY_ELEMENTS;
     }
     DCHECK_LE(kind, LAST_ELEMENTS_KIND);
     return kind;
   }
 }
 
 }  // namespace internal
 }  // namespace v8