Do not use possibly stale values for cache size, etc.

src/objects-inl.h

 // 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 1960 matching lines @@
 }
 
 
 void ExternalTwoByteString::set_resource(
     ExternalTwoByteString::Resource* resource) {
   *reinterpret_cast<Resource**>(FIELD_ADDR(this, kResourceOffset)) = resource;
 }
 
 
 void JSFunctionResultCache::MakeZeroSize() {
-  set(kFingerIndex, Smi::FromInt(kEntriesIndex));
-  set(kCacheSizeIndex, Smi::FromInt(kEntriesIndex));
+  set_finger_index(kEntriesIndex);
+  set_size(kEntriesIndex);
 }
 
 
 void JSFunctionResultCache::Clear() {
-  int cache_size = Smi::cast(get(kCacheSizeIndex))->value();
+  int cache_size = size();
   Object** entries_start = RawField(this, OffsetOfElementAt(kEntriesIndex));
   MemsetPointer(entries_start,
                 Heap::the_hole_value(),
                 cache_size - kEntriesIndex);
   MakeZeroSize();
 }
 
 
+int JSFunctionResultCache::size() {
+  return Smi::cast(get(kCacheSizeIndex))->value();
+}
+
+
+void JSFunctionResultCache::set_size(int size) {
+  set(kCacheSizeIndex, Smi::FromInt(size));
+}
+
+
+int JSFunctionResultCache::finger_index() {
+  return Smi::cast(get(kFingerIndex))->value();
+}
+
+
+void JSFunctionResultCache::set_finger_index(int finger_index) {
+  set(kFingerIndex, Smi::FromInt(finger_index));
+}
+
+
 byte ByteArray::get(int index) {
   ASSERT(index >= 0 && index < this->length());
   return READ_BYTE_FIELD(this, kHeaderSize + index * kCharSize);
 }
 
 
 void ByteArray::set(int index, byte value) {
   ASSERT(index >= 0 && index < this->length());
   WRITE_BYTE_FIELD(this, kHeaderSize + index * kCharSize, value);
 }
@@ skipping 1836 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_