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

runtime/vm/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/snapshot.h"
 
 #include "platform/assert.h"
 #include "vm/bootstrap.h"
 #include "vm/class_finalizer.h"
 #include "vm/exceptions.h"
@@ skipping 1021 matching lines @@
   for (intptr_t i = 0; i < len; i++) {
     *PassiveObjectHandle() = is_canonical ? ReadObjectImpl() : ReadObjectRef();
     result.SetAt(i, *PassiveObjectHandle());
   }
 }
 
 
 SnapshotWriter::SnapshotWriter(Snapshot::Kind kind,
                                uint8_t** buffer,
                                ReAlloc alloc,
-                               intptr_t initial_size)
+                               intptr_t initial_size,
+                               bool can_send_any_object)
     : BaseWriter(buffer, alloc, initial_size),
       kind_(kind),
       isolate_(Isolate::Current()),
       object_store_(isolate_->object_store()),
       class_table_(isolate_->class_table()),
       forward_list_(kMaxPredefinedObjectIds),
       exception_type_(Exceptions::kNone),
       exception_msg_(NULL),
-      unmarked_objects_(false) {
+      unmarked_objects_(false),
+      can_send_any_object_(can_send_any_object) {
 }
 
 
 void SnapshotWriter::WriteObject(RawObject* rawobj) {
   WriteObjectImpl(rawobj);
   WriteForwardedObjects();
 }
 
 
 void SnapshotWriter::HandleVMIsolateObject(RawObject* rawobj) {
@@ skipping 639 matching lines @@
   WriteInlinedObjectHeader(kOmittedObjectId);
 
   // Indicate this is an instance object.
   Write<int32_t>(SerializedHeaderData::encode(kInstanceObjectId));
 
   // Write out the class information for this object.
   WriteObjectImpl(cls);
 }
 
 
+bool SnapshotWriter::AllowObjectsInDartLibrary(RawLibrary* library) {
+  return (library == object_store()->collection_library() ||
+          library == object_store()->typed_data_library());
+}
+
+
 void SnapshotWriter::ThrowException(Exceptions::ExceptionType type,
                                     const char* msg) {
-  isolate()->object_store()->clear_sticky_error();
+  object_store()->clear_sticky_error();
   UnmarkAll();
   if (msg != NULL) {
     const String& msg_obj = String::Handle(String::New(msg));
     const Array& args = Array::Handle(Array::New(1));
     args.SetAt(0, msg_obj);
     Exceptions::ThrowByType(type, args);
   } else {
     Exceptions::ThrowByType(type, Object::empty_array());
   }
   UNREACHABLE();
@@ skipping 62 matching lines @@
     NoGCScope no_gc;
     WriteObject(obj.raw());
     UnmarkAll();
   } else {
     ThrowException(exception_type(), exception_msg());
   }
 }
 
 
 }  // namespace dart