Remove support for object grouping during Garbage Collection

runtime/vm/isolate.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/isolate.h"
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 #include "platform/assert.h"
 #include "platform/json.h"
@@ skipping 1628 matching lines @@
 
   // Dump all timing data for the isolate.
   if (FLAG_timing) {
     TimelinePauseTrace tpt;
     tpt.Print();
   }
 
   // Finalize any weak persistent handles with a non-null referent.
   FinalizeWeakPersistentHandlesVisitor visitor;
   api_state()->weak_persistent_handles().VisitHandles(&visitor);
-  api_state()->prologue_weak_persistent_handles().VisitHandles(&visitor);
 
   if (FLAG_trace_isolates) {
     heap()->PrintSizes();
     MegamorphicCacheTable::PrintSizes(this);
     Symbols::DumpStats();
     OS::Print("[-] Stopping isolate:\n"
               "\tisolate:    %s\n", name());
   }
   if (FLAG_print_metrics) {
     LogBlock lb;
@@ skipping 88 matching lines @@
 Dart_FileReadCallback Isolate::file_read_callback_ = NULL;
 Dart_FileWriteCallback Isolate::file_write_callback_ = NULL;
 Dart_FileCloseCallback Isolate::file_close_callback_ = NULL;
 Dart_EntropySource Isolate::entropy_source_callback_ = NULL;
 
 Monitor* Isolate::isolates_list_monitor_ = NULL;
 Isolate* Isolate::isolates_list_head_ = NULL;
 bool Isolate::creation_enabled_ = false;
 
 void Isolate::IterateObjectPointers(ObjectPointerVisitor* visitor,
-                                    bool visit_prologue_weak_handles,
                                     bool validate_frames) {
   HeapIterationScope heap_iteration_scope;
-  VisitObjectPointers(visitor, visit_prologue_weak_handles, validate_frames);
+  VisitObjectPointers(visitor, validate_frames);
 }
 
 
 void Isolate::VisitObjectPointers(ObjectPointerVisitor* visitor,
-                                  bool visit_prologue_weak_handles,
                                   bool validate_frames) {
   ASSERT(visitor != NULL);
 
   // Visit objects in the object store.
   object_store()->VisitObjectPointers(visitor);
 
   // Visit objects in the class table.
   class_table()->VisitObjectPointers(visitor);
 
   // Visit objects in per isolate stubs.
   StubCode::VisitObjectPointers(visitor);
 
   // Visit the dart api state for all local and persistent handles.
   if (api_state() != NULL) {
-    api_state()->VisitObjectPointers(visitor, visit_prologue_weak_handles);
+    api_state()->VisitObjectPointers(visitor);
   }
 
   // Visit the current tag which is stored in the isolate.
   visitor->VisitPointer(reinterpret_cast<RawObject**>(&current_tag_));
 
   // Visit the default tag which is stored in the isolate.
   visitor->VisitPointer(reinterpret_cast<RawObject**>(&default_tag_));
 
   // Visit the tag table which is stored in the isolate.
   visitor->VisitPointer(reinterpret_cast<RawObject**>(&tag_table_));
@@ skipping 20 matching lines @@
   // Visit objects that are being used for deoptimization.
   if (deopt_context() != NULL) {
     deopt_context()->VisitObjectPointers(visitor);
   }
 
   // Visit objects in thread registry (e.g., Dart stack, handles in zones).
   thread_registry()->VisitObjectPointers(visitor, validate_frames);
 }
 
 
-void Isolate::VisitWeakPersistentHandles(HandleVisitor* visitor,
-                                         bool visit_prologue_weak_handles) {
+void Isolate::VisitWeakPersistentHandles(HandleVisitor* visitor) {
   if (api_state() != NULL) {
-    api_state()->VisitWeakHandles(visitor, visit_prologue_weak_handles);
+    api_state()->VisitWeakHandles(visitor);
   }
 }
 
-
-void Isolate::VisitPrologueWeakPersistentHandles(HandleVisitor* visitor) {
-  if (api_state() != NULL) {
-    api_state()->VisitPrologueWeakHandles(visitor);
-  }
-}
-
 
 static const char* ExceptionPauseInfoToServiceEnum(Dart_ExceptionPauseInfo pi) {
   switch (pi) {
     case kPauseOnAllExceptions:
       return "All";
     case kNoPauseOnExceptions:
       return "None";
     case kPauseOnUnhandledExceptions:
       return "Unhandled";
     default:
@@ skipping 723 matching lines @@
 }
 
 
 RawInstance* IsolateSpawnState::BuildMessage(Thread* thread) {
   return DeserializeObject(thread,
                            serialized_message_, serialized_message_len_);
 }
 
 
 }  // namespace dart