X64: Made hash computation in serializer accept 64-bit pointers.

src/api.cc

 // Copyright 2009 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 2662 matching lines @@
 static const int kAlignedPointerShift = 2;
 
 
 Local<Value> v8::External::Wrap(void* data) {
   STATIC_ASSERT(sizeof(data) == sizeof(i::Address));
   LOG_API("External::Wrap");
   EnsureInitialized("v8::External::Wrap()");
   ENTER_V8;
   if ((reinterpret_cast<intptr_t>(data) & kAlignedPointerMask) == 0) {
     uintptr_t data_ptr = reinterpret_cast<uintptr_t>(data);
-    int data_value = static_cast<int>(data_ptr >> kAlignedPointerShift);
+    intptr_t data_value =
+        static_cast<intptr_t>(data_ptr >> kAlignedPointerShift);
     STATIC_ASSERT(sizeof(data_ptr) == sizeof(data_value));
-    i::Handle<i::Object> obj(i::Smi::FromInt(data_value));
-    return Utils::ToLocal(obj);
+    if (i::Smi::IsPtrValid(data_value)) {
+      i::Handle<i::Object> obj(i::Smi::FromIntptr(data_value));
+      return Utils::ToLocal(obj);
+    }
   }
   return ExternalNewImpl(data);
 }
 
 
 void* v8::External::Unwrap(v8::Handle<v8::Value> value) {
   if (IsDeadCheck("v8::External::Unwrap()")) return 0;
   i::Handle<i::Object> obj = Utils::OpenHandle(*value);
   if (obj->IsSmi()) {
     // The external value was an aligned pointer.
-    uintptr_t result = i::Smi::cast(*obj)->value() << kAlignedPointerShift;
+    uintptr_t result = static_cast<uintptr_t>(
+        i::Smi::cast(*obj)->value()) << kAlignedPointerShift;
     return reinterpret_cast<void*>(result);
   }
   return ExternalValueImpl(obj);
 }
 
 
 Local<External> v8::External::New(void* data) {
   STATIC_ASSERT(sizeof(data) == sizeof(i::Address));
   LOG_API("External::New");
   EnsureInitialized("v8::External::New()");
@@ skipping 750 matching lines @@
       reinterpret_cast<HandleScopeImplementer*>(storage);
   List<void**>* blocks_of_archived_thread = thread_local->Blocks();
   v8::ImplementationUtilities::HandleScopeData* handle_data_of_archived_thread =
       &thread_local->handle_scope_data_;
   Iterate(v, blocks_of_archived_thread, handle_data_of_archived_thread);
 
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal