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

src/global-handles.cc

Index: src/global-handles.cc
diff --git a/src/global-handles.cc b/src/global-handles.cc
index e519d7077fa5e4fa34517410f427bf73a62a31a9..5b01f61f3af5a1fba7fd1a8064eca55b5a7f2ea1 100644
--- a/src/global-handles.cc
+++ b/src/global-handles.cc
@@ -429,6 +429,26 @@ GlobalHandles::Node* GlobalHandles::head_ = NULL;
 GlobalHandles::Node* GlobalHandles::first_free_ = NULL;
 GlobalHandles::Node* GlobalHandles::first_deallocated_ = NULL;
 
+void GlobalHandles::RecordStats(HeapStats* stats) {
+  stats->global_handle_count = 0;
+  stats->weak_global_handle_count = 0;
+  stats->pending_global_handle_count = 0;
+  stats->near_death_global_handle_count = 0;
+  stats->destroyed_global_handle_count = 0;
+  for (Node* current = head_; current != NULL; current = current->next()) {
+    stats->global_handle_count++;
+    if (current->state_ == Node::WEAK) {
+      stats->weak_global_handle_count++;
+    } else if (current->state_ == Node::PENDING) {
+      stats->pending_global_handle_count++;
+    } else if (current->state_ == Node::NEAR_DEATH) {
+      stats->near_death_global_handle_count++;
+    } else if (current->state_ == Node::DESTROYED) {
+      stats->destroyed_global_handle_count++;
+    }
+  }
+}
+
 #ifdef DEBUG
 
 void GlobalHandles::PrintStats() {