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diff --git a/openjdkjvmti/ti_stack.h b/openjdkjvmti/ti_stack.h
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+/* Copyright (C) 2016 The Android Open Source Project
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This file implements interfaces from the file jvmti.h. This implementation
+ * is licensed under the same terms as the file jvmti.h.  The
+ * copyright and license information for the file jvmti.h follows.
+ *
+ * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifndef ART_OPENJDKJVMTI_TI_STACK_H_
+#define ART_OPENJDKJVMTI_TI_STACK_H_
+
+#include "jni.h"
+#include "jvmti.h"
+
+#include "base/mutex.h"
+
+namespace openjdkjvmti {
+
+class StackUtil {
+ public:
+  static jvmtiError GetAllStackTraces(jvmtiEnv* env,
+                                      jint max_frame_count,
+                                      jvmtiStackInfo** stack_info_ptr,
+                                      jint* thread_count_ptr)
+      REQUIRES(!art::Locks::thread_list_lock_);
+
+  static jvmtiError GetFrameCount(jvmtiEnv* env, jthread thread, jint* count_ptr);
+
+  static jvmtiError GetFrameLocation(jvmtiEnv* env,
+                                     jthread thread,
+                                     jint depth,
+                                     jmethodID* method_ptr,
+                                     jlocation* location_ptr);
+
+  static jvmtiError GetStackTrace(jvmtiEnv* env,
+                                  jthread thread,
+                                  jint start_depth,
+                                  jint max_frame_count,
+                                  jvmtiFrameInfo* frame_buffer,
+                                  jint* count_ptr);
+
+  static jvmtiError GetThreadListStackTraces(jvmtiEnv* env,
+                                             jint thread_count,
+                                             const jthread* thread_list,
+                                             jint max_frame_count,
+                                             jvmtiStackInfo** stack_info_ptr);
+};
+
+}  // namespace openjdkjvmti
+
+#endif  // ART_OPENJDKJVMTI_TI_STACK_H_