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

src/scopeinfo.h

 // Copyright 2006-2008 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 145 matching lines @@
   // Create a ZoneScopeInfo instance from a scope.
   explicit ZoneScopeInfo(Scope* scope)
       : ScopeInfo<ZoneListAllocationPolicy>(scope) {}
 
   // Create a ZoneScopeInfo instance from a Code object.
   explicit ZoneScopeInfo(Code* code)
       :  ScopeInfo<ZoneListAllocationPolicy>(code) {}
 };
 
 
+class ContextSlotCacheData {
+  static const int kLength = 256;
+  struct Key {
+    Code* code;
+    String* name;
+  };
+
+  Key keys_[kLength];
+  uint32_t values_[kLength];
+
+  friend class V8Context;
+  friend class ContextSlotCache;
+
+  ContextSlotCacheData();
+  DISALLOW_COPY_AND_ASSIGN(ContextSlotCacheData);
+};
+
 // Cache for mapping (code, property name) into context slot index.
 // The cache contains both positive and negative results.
 // Slot index equals -1 means the property is absent.
 // Cleared at startup and prior to mark sweep collection.
 class ContextSlotCache {
  public:
   // Lookup context slot index for (code, name).
   // If absent, kNotFound is returned.
   static int Lookup(Code* code,
                     String* name,
@@ skipping 12 matching lines @@
  private:
   inline static int Hash(Code* code, String* name);
 
 #ifdef DEBUG
   static void ValidateEntry(Code* code,
                             String* name,
                             Variable::Mode mode,
                             int slot_index);
 #endif
 
-  static const int kLength = 256;
-  struct Key {
-    Code* code;
-    String* name;
-  };
-
   struct Value {
     Value(Variable::Mode mode, int index) {
       ASSERT(ModeField::is_valid(mode));
       ASSERT(IndexField::is_valid(index));
       value_ = ModeField::encode(mode) | IndexField::encode(index);
       ASSERT(mode == this->mode());
       ASSERT(index == this->index());
     }
 
     inline Value(uint32_t value) : value_(value) {}
 
     uint32_t raw() { return value_; }
 
     Variable::Mode mode() { return ModeField::decode(value_); }
 
     int index() { return IndexField::decode(value_); }
 
     // Bit fields in value_ (type, shift, size). Must be public so the
     // constants can be embedded in generated code.
     class ModeField:  public BitField<Variable::Mode, 0, 3> {};
     class IndexField: public BitField<int,            3, 32-3> {};
    private:
     uint32_t value_;
   };
-
-  static Key keys_[kLength];
-  static uint32_t values_[kLength];
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCOPEINFO_H_