Add 64-bit stubs to call into the runtime and to call native functions.

runtime/vm/runtime_entry_test.cc

 // 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.
 
 #include "vm/runtime_entry.h"
 
+#include "vm/code_index_table.h"
 #include "vm/object.h"
 #include "vm/verifier.h"
 
 namespace dart {
 
+// Add function to a class and that class to the class dictionary so that
+// frame walking can be used.
+const Function& RuntimeEntry::RegisterFakeFunction(const char* name,
+                                                   const Code& code) {
+  const String& function_name = String::ZoneHandle(String::NewSymbol(name));
+  const Function& function = Function::ZoneHandle(
+      Function::New(function_name, RawFunction::kFunction, true, false, 0));
+  Class& cls = Class::ZoneHandle();
+  const Script& script = Script::Handle();
+  cls = Class::New(function_name, script);
+  const Array& functions = Array::Handle(Array::New(1));
+  functions.SetAt(0, function);
+  cls.SetFunctions(functions);
+  Library& lib = Library::Handle(Library::CoreLibrary());
+  lib.AddClass(cls);
+  function.SetCode(code);
+  CodeIndexTable* code_index_table = Isolate::Current()->code_index_table();
+  ASSERT(code_index_table != NULL);
+  code_index_table->AddFunction(function);
+  return function;
+}
+
+
 // A runtime call for test purposes.
 // Arg0: a smi.
 // Arg1: a smi.
 // Result: a smi representing arg0 - arg1.
 DEFINE_RUNTIME_ENTRY(TestSmiSub, 2) {
   ASSERT(arguments.Count() == kTestSmiSubRuntimeEntry.argument_count());
   const Smi& left = Smi::CheckedHandle(arguments.At(0));
   const Smi& right = Smi::CheckedHandle(arguments.At(1));
   // Ignoring overflow in the calculation below.
   intptr_t result = left.Value() - right.Value();
   arguments.SetReturn(Smi::Handle(Smi::New(result)));
 }
 
 }  // namespace dart