Add a VM defined class MirrorReference as an opaque pointer for Dart code to VM internal objects.

runtime/vm/object.cc

Index: runtime/vm/object.cc
===================================================================
--- runtime/vm/object.cc	(revision 24540)
+++ runtime/vm/object.cc	(working copy)
@@ -929,6 +929,10 @@
   object_store->set_weak_property_class(cls);
   RegisterPrivateClass(cls, Symbols::_WeakProperty(), core_lib);
 
+  cls = Class::New<VMReference>();
+  object_store->set_vm_reference_class(cls);
+  RegisterPrivateClass(cls, Symbols::_VMReference(), core_lib);
+
   // Setup some default native field classes which can be extended for
   // specifying native fields in dart classes.
   Library::InitNativeWrappersLibrary(isolate);
@@ -1199,6 +1203,9 @@
 
   cls = Class::New<WeakProperty>();
   object_store->set_weak_property_class(cls);
+
+  cls = Class::New<VMReference>();
+  object_store->set_vm_reference_class(cls);
 }
 
 
@@ -13671,4 +13678,20 @@
   return "_WeakProperty";
 }
 
+
+RawVMReference* VMReference::New(Heap::Space space) {
+  ASSERT(Isolate::Current()->object_store()->vm_reference_class()
+         != Class::null());
+  RawObject* raw = Object::Allocate(VMReference::kClassId,
+                                    VMReference::InstanceSize(),
+                                    space);
+  return reinterpret_cast<RawVMReference*>(raw);
+}

[siva, 2013/06/30 01:12:48]

Need to add unit tests in object_test.cc creating this object etc.

[rmacnak, 2013/07/01 18:35:49]

Added

+
+
+const char* VMReference::ToCString() const {
+  return "_VMReference";
+}
+
+
 }  // namespace dart