--- /dev/null	2015-10-08 07:25:02.000000000 -1000
+++ new/src/jdk.vm.ci/share/classes/jdk.vm.ci.code/src/jdk/vm/ci/code/stack/StackIntrospection.java	2015-10-08 07:25:02.000000000 -1000
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2014, 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 jdk.vm.ci.code.stack;
+
+import jdk.vm.ci.meta.*;
+
+public interface StackIntrospection {
+
+    /**
+     * Accesses the current stack, providing {@link InspectedFrame}s to the visitor that can be used
+     * to inspect the stack frames' contents. Iteration continues as long as
+     * {@link InspectedFrameVisitor#visitFrame}, which is invoked for every {@link InspectedFrame},
+     * returns null. Any non-null result of the visitor indicates that frame iteration should stop.
+     *
+     * @param initialMethods if this is non-{@code null}, then the stack trace will start at these
+     *            methods
+     * @param matchingMethods if this is non-{@code null}, then only matching stack frames are
+     *            returned
+     * @param initialSkip the number of matching methods to skip (including the initial method)
+     * @param visitor the visitor that is called for every matching method
+     * @return the last result returned by the visitor (which is non-null to indicate that iteration
+     *         should stop), or null if the whole stack was iterated.
+     */
+    <T> T iterateFrames(ResolvedJavaMethod[] initialMethods, ResolvedJavaMethod[] matchingMethods, int initialSkip, InspectedFrameVisitor<T> visitor);
+}