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

src/stub-cache.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 25 matching lines @@
 
 // The stub cache is used for megamorphic calls and property accesses.
 // It maps (map, name, type)->Code*
 
 // The design of the table uses the inline cache stubs used for
 // mono-morphic calls. The beauty of this, we do not have to
 // invalidate the cache whenever a prototype map is changed.  The stub
 // validates the map chain as in the mono-morphic case.
 
 class SCTableReference;
-
-class StubCache : public AllStatic {
+class StubCacheTypes {
  public:
   struct Entry {
     String* key;
     Code* value;
   };
 
+  static const int kPrimaryTableSize = 2048;
+  static const int kSecondaryTableSize = 512;
+};
 
+class StubCacheData:public StubCacheTypes {
+  Entry primary_[kPrimaryTableSize];
+  Entry secondary_[kSecondaryTableSize];
+
+  StubCacheData();
+
+  friend class StubCache;
+  friend class V8Context;
+  friend class SCTableReference;
+
+  DISALLOW_COPY_AND_ASSIGN(StubCacheData);
+};
+
+class StubCache : public AllStatic, public StubCacheTypes {
+ public:
   static void Initialize(bool create_heap_objects);
 
   // Computes the right stub matching. Inserts the result in the
   // cache before returning.  This might compile a stub if needed.
   static Object* ComputeLoadField(String* name,
                                   JSObject* receiver,
                                   JSObject* holder,
                                   int field_index);
 
   static Object* ComputeLoadCallback(String* name,
@@ skipping 141 matching lines @@
                             Register name,
                             Register scratch,
                             Register extra);
 
   enum Table {
     kPrimary,
     kSecondary
   };
 
  private:
-  friend class SCTableReference;
-  static const int kPrimaryTableSize = 2048;
-  static const int kSecondaryTableSize = 512;
-  static Entry primary_[];
-  static Entry secondary_[];
-
   // Computes the hashed offsets for primary and secondary caches.
   static int PrimaryOffset(String* name, Code::Flags flags, Map* map) {
     // This works well because the heap object tag size and the hash
     // shift are equal.  Shifting down the length field to get the
     // hash code would effectively throw away two bits of the hash
     // code.
     ASSERT(kHeapObjectTagSize == String::kHashShift);
     // Compute the hash of the name (use entire hash field).
     ASSERT(name->HasHashCode());
     uint32_t field = name->hash_field();
@@ skipping 49 matching lines @@
         reinterpret_cast<Address>(&first_entry(table)->value));
   }
 
   Address address() const { return address_; }
 
  private:
   explicit SCTableReference(Address address) : address_(address) {}
 
   static StubCache::Entry* first_entry(StubCache::Table table) {
     switch (table) {
-      case StubCache::kPrimary: return StubCache::primary_;
-      case StubCache::kSecondary: return StubCache::secondary_;
+      case StubCache::kPrimary:
+        return v8_context()->stub_cache_data_.primary_;
+      case StubCache::kSecondary:
+        return v8_context()->stub_cache_data_.secondary_;
     }
     UNREACHABLE();
     return NULL;
   }
 
   Address address_;
 };
 
 // ------------------------------------------------------------------------
 
@@ skipping 265 matching lines @@
   Object* CompileConstructStub(SharedFunctionInfo* shared);
 
  private:
   Object* GetCode();
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_