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

src/codegen.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 83 matching lines @@
 
 namespace v8 {
 namespace internal {
 
 
 // Code generation can be nested.  Code generation scopes form a stack
 // of active code generators.
 class CodeGeneratorScope BASE_EMBEDDED {
  public:
   explicit CodeGeneratorScope(CodeGenerator* cgen) {
-    previous_ = top_;
-    top_ = cgen;
+    CodeGeneratorData& code_generator_data = v8_context()->code_generator_data_;
+    previous_ = code_generator_data.top_;
+    code_generator_data.top_ = cgen;
   }
 
   ~CodeGeneratorScope() {
-    top_ = previous_;
+    v8_context()->code_generator_data_.top_ = previous_;
   }
 
   static CodeGenerator* Current() {
-    ASSERT(top_ != NULL);
-    return top_;
+    CodeGeneratorData& code_generator_data = v8_context()->code_generator_data_;
+    ASSERT(code_generator_data.top_ != NULL);
+    return code_generator_data.top_;
   }
 
  private:
-  static CodeGenerator* top_;
   CodeGenerator* previous_;
 };
 
 
 // Deferred code objects are small pieces of code that are compiled
 // out of line. They are used to defer the compilation of uncommon
 // paths thereby avoiding expensive jumps around uncommon code parts.
 class DeferredCode: public ZoneObject {
  public:
   DeferredCode();
@@ skipping 289 matching lines @@
     PrintF("ArgumentsAccessStub (type %d)\n", type_);
   }
 #endif
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODEGEN_H_