Implement a heap profiler for the Dart managed heap.

runtime/vm/pages.h

 // 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.
 
 #ifndef VM_PAGES_H_
 #define VM_PAGES_H_
 
 #include "vm/freelist.h"
 #include "vm/globals.h"
 #include "vm/virtual_memory.h"
@@ skipping 34 matching lines @@
   uword TryBumpAllocate(intptr_t size) {
     uword result = top();
     intptr_t remaining_space = end() - result;
     if (remaining_space < size) {
       return 0;
     }
     set_top(result + size);
     return result;
   }
 
+  void VisitObjects(ObjectVisitor* visitor) const;
   void VisitObjectPointers(ObjectPointerVisitor* visitor) const;
 
   RawObject* FindObject(FindObjectVisitor* visitor) const;
 
  private:
   static HeapPage* Initialize(VirtualMemory* memory, bool is_executable);
   static HeapPage* Allocate(intptr_t size, bool is_executable);
 
   // Deallocate the virtual memory backing this page. The page pointer to this
   // page becomes immediately inaccessible.
@@ skipping 26 matching lines @@
   intptr_t capacity() const { return capacity_; }
 
   bool Contains(uword addr) const;
   bool IsValidAddress(uword addr) const {
     return Contains(addr);
   }
   static bool IsPageAllocatableSize(intptr_t size) {
     return size <= kAllocatablePageSize;
   }
 
+  void VisitObjects(ObjectVisitor* visitor) const;
   void VisitObjectPointers(ObjectPointerVisitor* visitor) const;
 
   RawObject* FindObject(FindObjectVisitor* visitor) const;
 
   // Collect the garbage in the page space using mark-sweep.
   void MarkSweep(bool invoke_api_callbacks);
 
   static HeapPage* PageFor(RawObject* raw_obj) {
     return reinterpret_cast<HeapPage*>(
         RawObject::ToAddr(raw_obj) & ~(kPageSize -1));
@@ skipping 44 matching lines @@
 
   // Keep track whether a MarkSweep is currently running.
   bool sweeping_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(PageSpace);
 };
 
 }  // namespace dart
 
 #endif  // VM_PAGES_H_