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diff --git a/runtime/gc/space/image_space.h b/runtime/gc/space/image_space.h
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+++ b/runtime/gc/space/image_space.h
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+/*
+ * Copyright (C) 2011 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_SRC_GC_SPACE_IMAGE_SPACE_H_
+#define ART_SRC_GC_SPACE_IMAGE_SPACE_H_
+
+#include "space.h"
+
+namespace art {
+namespace gc {
+namespace space {
+
+// An image space is a space backed with a memory mapped image.
+class ImageSpace : public MemMapSpace {
+ public:
+  bool CanAllocateInto() const {
+    return false;
+  }
+
+  SpaceType GetType() const {
+    return kSpaceTypeImageSpace;
+  }
+
+  // create a Space from an image file. cannot be used for future allocation or collected.
+  static ImageSpace* Create(const std::string& image)
+      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+
+  const ImageHeader& GetImageHeader() const {
+    return *reinterpret_cast<ImageHeader*>(Begin());
+  }
+
+  const std::string GetImageFilename() const {
+    return GetName();
+  }
+
+  // Mark the objects defined in this space in the given live bitmap
+  void RecordImageAllocations(accounting::SpaceBitmap* live_bitmap) const
+      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+
+  accounting::SpaceBitmap* GetLiveBitmap() const {
+    return live_bitmap_.get();
+  }
+
+  accounting::SpaceBitmap* GetMarkBitmap() const {
+    // ImageSpaces have the same bitmap for both live and marked. This helps reduce the number of
+    // special cases to test against.
+    return live_bitmap_.get();
+  }
+
+  void Dump(std::ostream& os) const;
+
+ private:
+  friend class Space;
+
+  static size_t bitmap_index_;
+
+  UniquePtr<accounting::SpaceBitmap> live_bitmap_;
+
+  ImageSpace(const std::string& name, MemMap* mem_map);
+
+  DISALLOW_COPY_AND_ASSIGN(ImageSpace);
+};
+
+}  // namespace space
+}  // namespace gc
+}  // namespace art
+
+#endif  // ART_SRC_GC_SPACE_IMAGE_SPACE_H_