- Handle doubles transferred in message snapshots specially.

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/bigint_operations.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/snapshot.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
@@ skipping 1756 matching lines @@
   }
   writer->WriteBytes(reinterpret_cast<const uint8_t*>(&(str[2])), (len - 2));
 }
 
 
 RawDouble* Double::ReadFrom(SnapshotReader* reader,
                             intptr_t object_id,
                             intptr_t tags,
                             Snapshot::Kind kind) {
   ASSERT(reader != NULL);
+  ASSERT(kind != Snapshot::kMessage);
   // Read the double value for the object.
-  double value = reader->Read<double>();
+  double value = reader->ReadDouble();
 
   // Create a Double object or get canonical one if it is a canonical constant.
   Double& dbl = Double::ZoneHandle(reader->isolate(), Double::null());
   if (kind == Snapshot::kFull) {
     dbl = reader->NewDouble(value);
   } else {
     // When reading a script snapshot we need to canonicalize only those object
     // references that are objects from the core library (loaded from a
     // full snapshot). Objects that are only in the script need not be
     // canonicalized as they are already canonical.
-    // When reading a message snapshot we always have to canonicalize.
     if (RawObject::IsCanonical(tags) &&
-        (RawObject::IsCreatedFromSnapshot(tags) ||
-         (kind == Snapshot::kMessage))) {
+        RawObject::IsCreatedFromSnapshot(tags)) {
       dbl = Double::NewCanonical(value);
     } else {
       dbl = Double::New(value, HEAP_SPACE(kind));
     }
   }
   reader->AddBackRef(object_id, &dbl, kIsDeserialized);
 
   // Set the object tags.
   dbl.set_tags(tags);
 
   return dbl.raw();
 }
 
 
 void RawDouble::WriteTo(SnapshotWriter* writer,
                         intptr_t object_id,
                         Snapshot::Kind kind) {
   ASSERT(writer != NULL);
 
   // Write out the serialization header value for this object.
   writer->WriteInlinedObjectHeader(object_id);
 
   // Write out the class and tags information.
   writer->WriteIndexedObject(kDoubleCid);
   writer->WriteIntptrValue(writer->GetObjectTags(this));
 
   // Write out the double value.
-  writer->Write<double>(ptr()->value_);
+  writer->WriteDouble(ptr()->value_);
 }
 
 
 RawString* String::ReadFrom(SnapshotReader* reader,
                             intptr_t object_id,
                             intptr_t tags,
                             Snapshot::Kind kind) {
   UNREACHABLE();  // String is an abstract class.
   return String::null();
 }
@@ skipping 857 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 MirrorReference)");
   } else {
     UNREACHABLE();
   }
 }
 
 }  // namespace dart