Added recording of heap and global handle stats in a stack-allocated

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 80cc885a80c95857498ced94d1ceeba38b20d5cf..8bc55e80315e172de9d65db28e2751d744c883ef 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -189,6 +189,7 @@ namespace internal {
 
 // Forward declaration of the GCTracer class.
 class GCTracer;
+class HeapStats;
 
 
 // The all static Heap captures the interface to the global object heap.
@@ -865,6 +866,8 @@ class Heap : public AllStatic {
   static RootListIndex RootIndexForExternalArrayType(
       ExternalArrayType array_type);
 
+  static void RecordStats(HeapStats* stats);
+
  private:
   static int reserved_semispace_size_;
   static int max_semispace_size_;
@@ -1100,6 +1103,28 @@ class Heap : public AllStatic {
 };
 
 
+struct HeapStats {
+  int new_space_size;
+  int new_space_capacity;
+  int old_pointer_space_size;
+  int old_pointer_space_capacity;
+  int old_data_space_size;
+  int old_data_space_capacity;
+  int code_space_size;
+  int code_space_capacity;
+  int map_space_size;
+  int map_space_capacity;
+  int cell_space_size;
+  int cell_space_capacity;
+  int lo_space_size;
+  int global_handle_count;
+  int weak_global_handle_count;
+  int pending_global_handle_count;
+  int near_death_global_handle_count;
+  int destroyed_global_handle_count;
+};
+
+
 class AlwaysAllocateScope {
  public:
   AlwaysAllocateScope() {