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diff --git a/compiler/utils/dex_cache_arrays_layout.h b/compiler/utils/dex_cache_arrays_layout.h
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+++ b/compiler/utils/dex_cache_arrays_layout.h
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+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_COMPILER_UTILS_DEX_CACHE_ARRAYS_LAYOUT_H_
+#define ART_COMPILER_UTILS_DEX_CACHE_ARRAYS_LAYOUT_H_
+
+namespace art {
+
+/**
+ * @class DexCacheArraysLayout
+ * @details This class provides the layout information for the type, method, field and
+ * string arrays for a DexCache with a fixed arrays' layout (such as in the boot image),
+ */
+class DexCacheArraysLayout {
+ public:
+  // Construct an invalid layout.
+  DexCacheArraysLayout()
+      : /* types_offset_ is always 0u */
+        methods_offset_(0u),
+        strings_offset_(0u),
+        fields_offset_(0u),
+        size_(0u) {
+  }
+
+  // Construct a layout for a particular dex file.
+  explicit DexCacheArraysLayout(const DexFile* dex_file);
+
+  bool Valid() const {
+    return Size() != 0u;
+  }
+
+  size_t Size() const {
+    return size_;
+  }
+
+  size_t TypesOffset() const {
+    return types_offset_;
+  }
+
+  size_t TypeOffset(uint32_t type_idx) const;
+
+  size_t MethodsOffset() const {
+    return methods_offset_;
+  }
+
+  size_t MethodOffset(uint32_t method_idx) const;
+
+  size_t StringsOffset() const {
+    return strings_offset_;
+  }
+
+  size_t StringOffset(uint32_t string_idx) const;
+
+  size_t FieldsOffset() const {
+    return fields_offset_;
+  }
+
+  size_t FieldOffset(uint32_t field_idx) const;
+
+ private:
+  static constexpr size_t types_offset_ = 0u;
+  const size_t methods_offset_;
+  const size_t strings_offset_;
+  const size_t fields_offset_;
+  const size_t size_;
+
+  template <typename MirrorType>
+  static size_t ElementOffset(uint32_t idx);
+
+  template <typename MirrorType>
+  static size_t ArraySize(uint32_t num_elements);
+};
+
+}  // namespace art
+
+#endif  // ART_COMPILER_UTILS_DEX_CACHE_ARRAYS_LAYOUT_H_