Assign external sizes to external strings and to external typed data created by the VM.

runtime/vm/raw_object_snapshot.cc

 // 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.
 
 #include "vm/native_entry.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/snapshot.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
@@ skipping 2616 matching lines @@
   intptr_t cid = RawObject::ClassIdTag::decode(tags);
   intptr_t length = reader->ReadSmiValue();
   uint8_t* data = reinterpret_cast<uint8_t*>(reader->ReadRawPointerValue());
   ExternalTypedData& obj = ExternalTypedData::ZoneHandle(
       ExternalTypedData::New(cid, data, length));
   reader->AddBackRef(object_id, &obj, kIsDeserialized);
   void* peer = reinterpret_cast<void*>(reader->ReadRawPointerValue());
   Dart_WeakPersistentHandleFinalizer callback =
       reinterpret_cast<Dart_WeakPersistentHandleFinalizer>(
           reader->ReadRawPointerValue());
-  obj.AddFinalizer(peer, callback);
+  intptr_t external_size = obj.LengthInBytes();
+  obj.AddFinalizer(peer, callback, external_size);
   return obj.raw();
 }
 
 
 #define TYPED_DATA_WRITE(type)                                                 \
   {                                                                            \
     type* data = reinterpret_cast<type*>(ptr()->data());                       \
     for (intptr_t i = 0; i < len; i++) {                                       \
       writer->Write(data[i]);                                                  \
     }                                                                          \
@@ skipping 375 matching lines @@
     // We do not allow objects with native fields in an isolate message.
     writer->SetWriteException(Exceptions::kArgument,
                               "Illegal argument in isolate message"
                               " : (object is a UserTag)");
   } else {
     UNREACHABLE();
   }
 }
 
 }  // namespace dart