[wasm] Serialization/Deserialization of compiled module

src/snapshot/deserializer.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_SNAPSHOT_DESERIALIZER_H_
 #define V8_SNAPSHOT_DESERIALIZER_H_
 
 #include "src/heap/heap.h"
 #include "src/objects.h"
 #include "src/snapshot/serializer-common.h"
@@ skipping 12 matching lines @@
 #define V8_CODE_EMBEDS_OBJECT_POINTER 0
 #endif
 
 class Heap;
 
 // A Deserializer reads a snapshot and reconstructs the Object graph it defines.
 class Deserializer : public SerializerDeserializer {
  public:
   // Create a deserializer from a snapshot byte source.
   template <class Data>
-  explicit Deserializer(Data* data)
+  explicit Deserializer(Data* data, bool deserializing_user_code = false)
       : isolate_(NULL),
         source_(data->Payload()),
         magic_number_(data->GetMagicNumber()),
         external_reference_table_(NULL),
         deserialized_large_objects_(0),
-        deserializing_user_code_(false),
+        deserializing_user_code_(deserializing_user_code),
         next_alignment_(kWordAligned) {
     DecodeReservation(data->Reservations());
   }
 
   ~Deserializer() override;
 
   // Deserialize the snapshot into an empty heap.
   void Deserialize(Isolate* isolate);
 
   // Deserialize a single object and the objects reachable from it.
   MaybeHandle<Object> DeserializePartial(Isolate* isolate,
                                          Handle<JSGlobalProxy> global_proxy);
 
-  // Deserialize a shared function info. Fail gracefully.
-  MaybeHandle<SharedFunctionInfo> DeserializeCode(Isolate* isolate);
+  // Deserialize an object graph. Fail gracefully.
+  MaybeHandle<HeapObject> DeserializeObject(Isolate* isolate);
 
   // Add an object to back an attached reference. The order to add objects must
   // mirror the order they are added in the serializer.
   void AddAttachedObject(Handle<HeapObject> attached_object) {
     attached_objects_.Add(attached_object);
   }
 
  private:
   void VisitPointers(Object** start, Object** end) override;
 
@@ skipping 76 matching lines @@
 
   AllocationAlignment next_alignment_;
 
   DISALLOW_COPY_AND_ASSIGN(Deserializer);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_SNAPSHOT_DESERIALIZER_H_