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diff --git a/libartbase/base/safe_copy.h b/libartbase/base/safe_copy.h
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+++ b/libartbase/base/safe_copy.h
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+/*
+ * Copyright (C) 2017 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_LIBARTBASE_BASE_SAFE_COPY_H_
+#define ART_LIBARTBASE_BASE_SAFE_COPY_H_
+
+#include <sys/types.h>
+
+namespace art {
+
+// Safely dereference a pointer.
+// Returns -1 if safe copy isn't implemented on the platform, or if the transfer is too large.
+// Returns 0 if src is unreadable.
+ssize_t SafeCopy(void *dst, const void *src, size_t len);
+
+}  // namespace art
+
+#endif  // ART_LIBARTBASE_BASE_SAFE_COPY_H_