Fix for issue 21398 (only send "literal like" objects across isolates spawned using spawnURI

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/object.h"
 #include "vm/object_store.h"
 #include "vm/snapshot.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
 #include "vm/visitor.h"
@@ skipping 98 matching lines @@
     writer->Write<int16_t>(ptr()->num_type_arguments_);
     writer->Write<int16_t>(ptr()->num_own_type_arguments_);
     writer->Write<uint16_t>(ptr()->num_native_fields_);
     writer->Write<int32_t>(ptr()->token_pos_);
     writer->Write<uint16_t>(ptr()->state_bits_);
 
     // Write out all the object pointer fields.
     SnapshotWriterVisitor visitor(writer);
     visitor.VisitPointers(from(), to());
   } else {
-    writer->WriteClassId(this);
+    // Until we have maps implemented as internal VM objects we will use
+    // the collections library qualifier to allow maps to be sent across.
+    if (writer->can_send_any_object() ||
+        writer->AllowObjectsInDartLibrary(ptr()->library_)) {
+      writer->WriteClassId(this);
+    } else {
+      // We do not allow regular dart instances in isolate messages.
+      writer->SetWriteException(Exceptions::kArgument,
+                                "Illegal argument in isolate message"
+                                " : (object is a regular Dart Instance)");
+    }
   }
 }
 
 
 RawUnresolvedClass* UnresolvedClass::ReadFrom(SnapshotReader* reader,
                                               intptr_t object_id,
                                               intptr_t tags,
                                               Snapshot::Kind kind) {
   ASSERT(reader != NULL);
 
@@ skipping 2529 matching lines @@
     UNREACHABLE();
   }
 }
 
 
 RawSendPort* SendPort::ReadFrom(SnapshotReader* reader,
                                 intptr_t object_id,
                                 intptr_t tags,
                                 Snapshot::Kind kind) {
   uint64_t id = reader->Read<uint64_t>();
+  uint64_t origin_id = reader->Read<uint64_t>();
 
   SendPort& result = SendPort::ZoneHandle(reader->isolate(),
-                                          SendPort::New(id));
+                                          SendPort::New(id, origin_id));
   reader->AddBackRef(object_id, &result, kIsDeserialized);
   return result.raw();
 }
 
 
 void RawSendPort::WriteTo(SnapshotWriter* writer,
                           intptr_t object_id,
                           Snapshot::Kind kind) {
   // Write out the serialization header value for this object.
   writer->WriteInlinedObjectHeader(object_id);
 
   // Write out the class and tags information.
   writer->WriteIndexedObject(kSendPortCid);
   writer->WriteTags(writer->GetObjectTags(this));
 
   writer->Write<uint64_t>(ptr()->id_);
+  writer->Write<uint64_t>(ptr()->origin_id_);
 }
 
 
 RawStacktrace* Stacktrace::ReadFrom(SnapshotReader* reader,
                                     intptr_t object_id,
                                     intptr_t tags,
                                     Snapshot::Kind kind) {
   if (kind == Snapshot::kFull) {
     Stacktrace& result = Stacktrace::ZoneHandle(reader->isolate(),
                                                 reader->NewStacktrace());
@@ skipping 191 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