- Add an isolate field to visitors.

runtime/vm/gc_marker.cc

 // Copyright (c) 2011, 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/gc_marker.h"
 
 #include "vm/allocation.h"
 #include "vm/dart_api_state.h"
 #include "vm/isolate.h"
 #include "vm/pages.h"
@@ skipping 98 matching lines @@
   MarkingStackChunk* empty_chunks_;
   RawObject** marking_stack_;
   uint32_t top_;
 
   DISALLOW_COPY_AND_ASSIGN(MarkingStack);
 };
 
 
 class MarkingVisitor : public ObjectPointerVisitor {
  public:
-  MarkingVisitor(Heap* heap, PageSpace* page_space, MarkingStack* marking_stack)
-      : heap_(heap),
+  MarkingVisitor(Isolate* isolate,
+                 Heap* heap,
+                 PageSpace* page_space,
+                 MarkingStack* marking_stack)
+      : ObjectPointerVisitor(isolate),
+        heap_(heap),
         vm_heap_(Dart::vm_isolate()->heap()),
         page_space_(page_space),
         marking_stack_(marking_stack) {
     ASSERT(heap_ != vm_heap_);
   }
 
   MarkingStack* marking_stack() const { return marking_stack_; }
 
   void VisitPointers(RawObject** first, RawObject** last) {
     for (RawObject** current = first; current <= last; current++) {
@@ skipping 176 matching lines @@
     raw_obj->VisitPointers(visitor);
   }
 }
 
 
 void GCMarker::MarkObjects(Isolate* isolate,
                            PageSpace* page_space,
                            bool invoke_api_callbacks) {
   MarkingStack marking_stack;
   Prologue(isolate, invoke_api_callbacks);
-  MarkingVisitor mark(heap_, page_space, &marking_stack);
+  MarkingVisitor mark(isolate, heap_, page_space, &marking_stack);
   IterateRoots(isolate, &mark, !invoke_api_callbacks);
   DrainMarkingStack(isolate, &mark);
   IterateWeakReferences(isolate, &mark);
   MarkingWeakVisitor mark_weak;
   IterateWeakRoots(isolate, &mark_weak, invoke_api_callbacks);
   Epilogue(isolate, invoke_api_callbacks);
 }
 
 }  // namespace dart