Make the GC aware of JSReceiver pointers in LookupResults.

src/isolate.h

 // Copyright 2011 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 237 matching lines @@
   Address js_entry_sp_;  // the stack pointer of the bottom js entry frame
   Address external_callback_;  // the external callback we're currently in
   StateTag current_vm_state_;
 
   // Generated code scratch locations.
   int32_t formal_count_;
 
   // Call back function to report unsafe JS accesses.
   v8::FailedAccessCheckCallback failed_access_check_callback_;
 
+  // Head of the list of live LookupResults.
+  LookupResult* top_lookup_result_;
+
   // Whether out of memory exceptions should be ignored.
   bool ignore_out_of_memory_;
 
  private:
   void InitializeInternal();
 
   Address try_catch_handler_address_;
 };
 
 #if defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_MIPS)
@@ skipping 720 matching lines @@
         // in JS or not.
         ASSERT((current_state == JS) == (state == JS));
       }
     }
     thread_local_top_.current_vm_state_ = state;
   }
 
   void SetData(void* data) { embedder_data_ = data; }
   void* GetData() { return embedder_data_; }
 
+  LookupResult* top_lookup_result() {
+    return thread_local_top_.top_lookup_result_;
+  }
+  void SetTopLookupResult(LookupResult* top) {
+    thread_local_top_.top_lookup_result_ = top;
+  }
+
  private:
   Isolate();
 
   // The per-process lock should be acquired before the ThreadDataTable is
   // modified.
   class ThreadDataTable {
    public:
     ThreadDataTable();
     ~ThreadDataTable();
 
@@ skipping 342 matching lines @@
 
 // Mark the global context with out of memory.
 inline void Context::mark_out_of_memory() {
   global_context()->set_out_of_memory(HEAP->true_value());
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ISOLATE_H_