--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/lang/LiveStackFrameInfo.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) 2015, 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.  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.
+ */
+package java.lang;
+
+final class LiveStackFrameInfo extends StackFrameInfo implements LiveStackFrame {
+    private static Object[] EMPTY_ARRAY = new Object[0];
+
+    // These flags must match the values maintained in the VM
+    private static final int MODE_INTERPRETED = 0x01;
+    private static final int MODE_COMPILED    = 0x02;
+
+    LiveStackFrameInfo(StackWalker walker) {
+        super(walker);
+    }
+
+    // These fields are initialized by the VM if ExtendedOption.LOCALS_AND_OPERANDS is set
+    private Object[] monitors = EMPTY_ARRAY;
+    private Object[] locals = EMPTY_ARRAY;
+    private Object[] operands = EMPTY_ARRAY;
+    private int mode = 0;
+
+    @Override
+    public Object[] getMonitors() {
+        return monitors;
+    }
+
+    @Override
+    public Object[] getLocals() {
+        return locals;
+    }
+
+    @Override
+    public Object[] getStack() {
+        return operands;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder retVal = new StringBuilder(super.toString());
+        if (mode != 0) {
+            retVal.append("(");
+            if ((mode & MODE_INTERPRETED) == MODE_INTERPRETED) {
+                retVal.append(" interpreted ");
+            }
+            if ((mode & MODE_COMPILED) == MODE_COMPILED) {
+                retVal.append(" compiled ");
+            }
+            retVal.append(")");
+        }
+        return retVal.toString();
+    }
+
+    /*
+     * Convert primitive value to {@code PrimitiveSlot} object to represent
+     * a local variable or an element on the operand stack of primitive type.
+     */
+
+    static PrimitiveSlot asPrimitive(int value) {
+        return new PrimitiveSlot32(value);
+    }
+
+    static PrimitiveSlot asPrimitive(long value) {
+        return new PrimitiveSlot64(value);
+    }
+
+    private static class PrimitiveSlot32 extends PrimitiveSlot {
+        final int value;
+        PrimitiveSlot32(int value) {
+            this.value = value;
+        }
+
+        @Override
+        public int size() {
+            return 4;
+        }
+
+        @Override
+        public int intValue() {
+            return value;
+        }
+
+        @Override
+        public String toString() {
+            return String.valueOf(value);
+        }
+    }
+
+    private static class PrimitiveSlot64 extends PrimitiveSlot {
+        final long value;
+        PrimitiveSlot64(long value) {
+            this.value = value;
+        }
+
+        @Override
+        public int size() {
+            return 8;
+        }
+
+        @Override
+        public long longValue() {
+            return value;
+        }
+
+        @Override
+        public String toString() {
+            return String.valueOf(value);
+        }
+    }
+}