Patch for allowing several V8 instances in process:...

src/serialize.h

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 271 matching lines @@
 class SnapshotByteSink {
  public:
   virtual ~SnapshotByteSink() { }
   virtual void Put(int byte, const char* description) = 0;
   virtual void PutSection(int byte, const char* description) {
     Put(byte, description);
   }
   void PutInt(uintptr_t integer, const char* description);
 };
 
+class SerializerPrivateData;
+
+class SerializerData {
+ public:
+  SerializerPrivateData& private_data_;
+ private:
+  bool serialization_enabled_;
+  // Did we already make use of the fact that serialization was not enabled?
+  bool too_late_to_enable_now_;
+
+  SerializerData();
+  ~SerializerData();
+
+  friend class V8Context;
+  friend class Serializer;
+  DISALLOW_COPY_AND_ASSIGN(SerializerData);
+};
 
 class Serializer : public SerDes {
  public:
   explicit Serializer(SnapshotByteSink* sink);
   // Serialize the current state of the heap. This operation destroys the
   // heap contents.
   void Serialize();
   void VisitPointers(Object** start, Object** end);
 
   static void Enable() {
-    if (!serialization_enabled_) {
-      ASSERT(!too_late_to_enable_now_);
+    SerializerData& serializer_data = v8_context()->serializer_data_;
+    if (!serializer_data.serialization_enabled_) {
+      ASSERT(!serializer_data.too_late_to_enable_now_);
     }
-    serialization_enabled_ = true;
+    serializer_data.serialization_enabled_ = true;
   }
 
-  static void Disable() { serialization_enabled_ = false; }
+  static void Disable() {
+    v8_context()->serializer_data_.serialization_enabled_ = false;
+  }
   // Call this when you have made use of the fact that there is no serialization
   // going on.
-  static void TooLateToEnableNow() { too_late_to_enable_now_ = true; }
-  static bool enabled() { return serialization_enabled_; }
+  static void TooLateToEnableNow() {
+    v8_context()->serializer_data_.too_late_to_enable_now_ = true;
+  }
+  static bool enabled() {
+    return v8_context()->serializer_data_.serialization_enabled_;
+  }
 #ifdef DEBUG
   virtual void Synchronize(const char* tag);
 #endif
 
  private:
   enum ReferenceRepresentation {
     TAGGED_REPRESENTATION,      // A tagged object reference.
     CODE_TARGET_REPRESENTATION  // A reference to first instruction in target.
   };
   class ObjectSerializer : public ObjectVisitor {
@@ skipping 52 matching lines @@
   }
 
   // Keep track of the fullness of each space in order to generate
   // relative addresses for back references.  Large objects are
   // just numbered sequentially since relative addresses make no
   // sense in large object space.
   int fullness_[LAST_SPACE + 1];
   SnapshotByteSink* sink_;
   int current_root_index_;
   ExternalReferenceEncoder* external_reference_encoder_;
-  static bool serialization_enabled_;
-  // Did we already make use of the fact that serialization was not enabled?
-  static bool too_late_to_enable_now_;
-
   friend class ObjectSerializer;
   friend class Deserializer;
 
   DISALLOW_COPY_AND_ASSIGN(Serializer);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_SERIALIZE_H_