--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/ThreadStackTrace.java	Fri Jun 02 12:30:49 2017 +0530
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2017, 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.
+ *
+ * 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.
+ *
+ */
+
+package sun.jvm.hotspot.runtime;
+
+import java.util.*;
+
+public class ThreadStackTrace {
+    private JavaThread                        thread;
+    private int                               depth;  // number of stack frames added
+    private ArrayList<StackFrameInfo>         frames;
+
+    public ThreadStackTrace(JavaThread t) {
+        this.thread = t;
+        this.depth = 0;
+        this.frames = new ArrayList<StackFrameInfo>();
+    }
+
+    public int getStackDepth() {
+        return depth;
+    }
+
+    public StackFrameInfo stackFrameAt(int index) {
+        return frames.get(index);
+    }
+
+    public void dumpStack(int maxDepth) {
+        if (!thread.isJavaThread()) {
+            System.out.println("dumpStack: not java Thread returning");
+            return;
+        }
+        try {
+            for (JavaVFrame vf = thread.getLastJavaVFrameDbg(); vf != null; vf = vf.javaSender()) {
+                StackFrameInfo frame = new StackFrameInfo(vf);
+                frames.add(frame);
+                depth++;
+
+                if (maxDepth > 0 && depth == maxDepth) {
+                    // Skip frames if more than maxDepth
+                    break;
+                }
+            }
+        } catch (Exception e) {
+            System.out.println("Error occurred during stack walking:");
+            e.printStackTrace();
+        }
+    }
+}