Make sure that all objects store in the Code object live in old space.

runtime/vm/object.h

 // Copyright (c) 2012, 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.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 2887 matching lines @@
   bool ContainsInstructionAt(uword addr) const {
     const Instructions& instr = Instructions::Handle(instructions());
     const uword offset = addr - instr.EntryPoint();
     return offset < static_cast<uword>(instr.size());
   }
 
   RawPcDescriptors* pc_descriptors() const {
     return raw_ptr()->pc_descriptors_;
   }
   void set_pc_descriptors(const PcDescriptors& descriptors) const {
+    ASSERT(descriptors.IsOld());
     StorePointer(&raw_ptr()->pc_descriptors_, descriptors.raw());
   }
 
   // Array of DeoptInfo objects.
   RawArray* deopt_info_array() const {
     return raw_ptr()->deopt_info_array_;
   }
   void set_deopt_info_array(const Array& array) const;
 
   RawArray* object_table() const {
@@ skipping 58 matching lines @@
   };
 
 
   const Comments& comments() const;
   void set_comments(const Comments& comments) const;
 
   RawLocalVarDescriptors* var_descriptors() const {
     return raw_ptr()->var_descriptors_;
   }
   void set_var_descriptors(const LocalVarDescriptors& value) const {
+    ASSERT(value.IsOld());
     StorePointer(&raw_ptr()->var_descriptors_, value.raw());
   }
 
   RawExceptionHandlers* exception_handlers() const {
     return raw_ptr()->exception_handlers_;
   }
   void set_exception_handlers(const ExceptionHandlers& handlers) const {
+    ASSERT(handlers.IsOld());
     StorePointer(&raw_ptr()->exception_handlers_, handlers.raw());
   }
 
   RawFunction* function() const {
     return raw_ptr()->function_;
   }
   void set_function(const Function& function) const {
+    ASSERT(function.IsOld());
     StorePointer(&raw_ptr()->function_, function.raw());
   }
 
   // We would have a VisitPointers function here to traverse all the
   // embedded objects in the instructions using pointer_offsets.
 
   static const intptr_t kBytesPerElement =
       sizeof(reinterpret_cast<RawCode*>(0)->data_[0]);
   static const intptr_t kMaxElements = kSmiMax / kBytesPerElement;
 
@@ skipping 3015 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_