Don't share function result caches between contexts.

src/x64/codegen-x64.cc

 // Copyright 2010 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 4287 matching lines @@
   ASSERT_NE(NULL, args->at(0)->AsLiteral());
   int cache_id = Smi::cast(*(args->at(0)->AsLiteral()->handle()))->value();
 
   Handle<FixedArray> jsfunction_result_caches(
       Top::global_context()->jsfunction_result_caches());
   if (jsfunction_result_caches->length() <= cache_id) {
     __ Abort("Attempt to use undefined cache.");
     frame_->Push(Factory::undefined_value());
     return;
   }
-  Handle<FixedArray> cache_obj(
-      FixedArray::cast(jsfunction_result_caches->get(cache_id)));
 
   Load(args->at(1));
   Result key = frame_->Pop();
   key.ToRegister();
 
   Result cache = allocator()->Allocate();
-  __ movq(cache.reg(), cache_obj, RelocInfo::EMBEDDED_OBJECT);
+  ASSERT(cache.is_valid());
+  __ movq(cache.reg(), ContextOperand(rsi, Context::GLOBAL_INDEX));
+  __ movq(cache.reg(),
+          FieldOperand(cache.reg(), GlobalObject::kGlobalContextOffset));
+  __ movq(cache.reg(),
+          ContextOperand(cache.reg(), Context::JSFUNCTION_RESULT_CACHES_INDEX));
+  __ movq(cache.reg(),
+          FieldOperand(cache.reg(), FixedArray::OffsetOfElementAt(cache_id)));
 
   Result tmp = allocator()->Allocate();
+  ASSERT(tmp.is_valid());
 
   DeferredSearchCache* deferred = new DeferredSearchCache(tmp.reg(),
                                                           cache.reg(),
                                                           key.reg());
 
   const int kFingerOffset =
       FixedArray::OffsetOfElementAt(JSFunctionResultCache::kFingerIndex);
   // tmp.reg() now holds finger offset as a smi.
   ASSERT(kSmiTag == 0 && kSmiTagSize == 1);
   __ movq(tmp.reg(), FieldOperand(cache.reg(), kFingerOffset));
@@ skipping 6150 matching lines @@
   // Call the function from C++.
   return FUNCTION_CAST<ModuloFunction>(buffer);
 }
 
 #endif
 
 
 #undef __
 
 } }  // namespace v8::internal