Tests for GuardField length check along with bug fixes

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 1978 matching lines @@
   void set_guarded_cid(intptr_t cid) const {
     raw_ptr()->guarded_cid_ = cid;
   }
   static intptr_t guarded_cid_offset() {
     return OFFSET_OF(RawField, guarded_cid_);
   }
   // Return the list length that any list stored in this field is guaranteed
   // to have. If length is kUnknownFixedLength the length has not
   // been determined. If length is kNoFixedLength this field has multiple
   // list lengths associated with it and cannot be predicted.
-  intptr_t guarded_list_length() const {
-    return raw_ptr()->guarded_list_length_;
-  }
-  void set_guarded_list_length(intptr_t list_length) const {
-    raw_ptr()->guarded_list_length_ = list_length;
-  }
+  intptr_t guarded_list_length() const;
+  void set_guarded_list_length(intptr_t list_length) const;
   static intptr_t guarded_list_length_offset() {
     return OFFSET_OF(RawField, guarded_list_length_);
   }
   bool needs_length_check() const {
     const bool r = guarded_list_length() >= Field::kUnknownFixedLength;
     ASSERT(!r || is_final());
     return r;
   }
 
   static bool IsExternalizableCid(intptr_t cid) {
@@ skipping 4116 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_