Track live instance and allocation counts for classes

runtime/vm/code_generator.cc

Index: runtime/vm/code_generator.cc
diff --git a/runtime/vm/code_generator.cc b/runtime/vm/code_generator.cc
index 5de912a0928919942675ffef1c679bf933f8d9bb..e31f38362c253b6e6408d088872b2cf403168fb1 100644
--- a/runtime/vm/code_generator.cc
+++ b/runtime/vm/code_generator.cc
@@ -109,6 +109,8 @@ DEFINE_RUNTIME_ENTRY(AllocateArray, 2) {
 // Return value: newly allocated object.
 DEFINE_RUNTIME_ENTRY(AllocateObject, 3) {
   const Class& cls = Class::CheckedHandle(arguments.ArgAt(0));
+  // Report allocate to heap class stats.
+  isolate->class_table()->AllocateClassNewSpace(cls.id(), cls.instance_size());
   const Instance& instance = Instance::Handle(Instance::New(cls));
   arguments.SetReturn(instance);
   if (cls.NumTypeArguments() == 0) {