Work in progres, please take a look and give early feedback if this is the way we want to structure…

src/vm/session.cc

 // Copyright (c) 2014, the Fletch 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.md file.
 
 #include "src/vm/session.h"
 
 #include "src/shared/bytecodes.h"
 #include "src/shared/connection.h"
 #include "src/shared/flags.h"
 
@@ skipping 748 matching lines @@
   } else if (name == Names::kConstantMap) {
     klass = program()->constant_map_class();
   } else if (name == Names::kNum) {
     klass = program()->num_class();
   } else if (name == Names::kString) {
     klass = program()->string_class();
   } else if (name == Names::kCoroutine) {
     klass = program()->coroutine_class();
   } else if (name == Names::kPort) {
     klass = program()->port_class();
-  } else if (name == Names::kForeign) {
-    klass = program()->foreign_class();
+  } else if (name == Names::kForeignMemory) {
+    klass = program()->foreignmemory_class();
+  } else if (name == Names::kForeignFunction) {
+    klass = program()->foreignfunction_class();
   } else {
+    printf("name: %d, %d", name, Names::kForeignFunction);
     UNREACHABLE();
   }
 
+  if (!(klass->instance_format().type() != InstanceFormat::INSTANCE_TYPE ||
+       klass->NumberOfInstanceFields() == fields)) {
+    printf("Numberof fields: %d %d",  klass->NumberOfInstanceFields(), fields);
+  }
   ASSERT(klass->instance_format().type() != InstanceFormat::INSTANCE_TYPE ||
          klass->NumberOfInstanceFields() == fields);
 
   Push(klass);
 }
 
 void Session::PushConstantList(int length) {
   PushNewArray(length);
   GC_AND_RETRY_ON_ALLOCATION_FAILURE(
       result,
@@ skipping 287 matching lines @@
   // heaps; they need to be visited as well. See Program::CollectGarbage for
   // how it is done there.
   // Issue: https://github.com/dart-lang/fletch/issues/51
   TransformInstancesProcessVisitor process_visitor;
   Scheduler* scheduler = program()->scheduler();
   VisitProcesses(&process_visitor);
   scheduler->VisitProcesses(program(), &process_visitor);
 }
 
 }  // namespace fletch