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

src/compilation-cache.h

 // Copyright 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 13 matching lines @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_COMPILATION_CACHE_H_
 #define V8_COMPILATION_CACHE_H_
 
 namespace v8 {
 namespace internal {
 
+class CompilationCachePrivateData;
+
+class CompilationCacheData {
+ public:
+  CompilationCachePrivateData& private_data_;
+ private:
+  CompilationCacheData();
+  ~CompilationCacheData();
+
+  friend class V8Context;
+  friend class CompilationCache;
+  DISALLOW_COPY_AND_ASSIGN(CompilationCacheData);
+};
 
 // The compilation cache keeps function boilerplates for compiled
 // scripts and evals. The boilerplates are looked up using the source
 // string as the key. For regular expressions the compilation data is cached.
 class CompilationCache {
  public:
   // Finds the script function boilerplate for a source
   // string. Returns an empty handle if the cache doesn't contain a
   // script for the given source string with the right origin.
   static Handle<JSFunction> LookupScript(Handle<String> source,
@@ skipping 45 matching lines @@
   // Enable/disable compilation cache. Used by debugger to disable compilation
   // cache during debugging to make sure new scripts are always compiled.
   static void Enable();
   static void Disable();
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_COMPILATION_CACHE_H_