--- a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/ConstantPool.java	Sat Sep 30 00:14:39 2017 +0000
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/ConstantPool.java	Sat Sep 30 01:38:57 2017 +0000
@@ -269,13 +269,12 @@
 
   public static int  decodeInvokedynamicIndex(int i) { Assert.that(isInvokedynamicIndex(i),  ""); return ~i; }
 
-  // The invokedynamic points at the object index.  The object map points at
-  // the cpCache index and the cpCache entry points at the original constant
-  // pool index.
+  // The invokedynamic points at a CP cache entry.  This entry points back
+  // at the original CP entry (CONSTANT_InvokeDynamic) and also (via f2) at an entry
+  // in the resolved_references array (which provides the appendix argument).
   public int invokedynamicCPCacheIndex(int index) {
     Assert.that(isInvokedynamicIndex(index), "should be a invokedynamic index");
-    int rawIndex = decodeInvokedynamicIndex(index);
-    return referenceMap().at(rawIndex);
+    return decodeInvokedynamicIndex(index);
   }
 
   ConstantPoolCacheEntry invokedynamicCPCacheEntryAt(int index) {

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/serviceability/sa/TestRevPtrsForInvokeDynamic.java	Sat Sep 30 01:38:57 2017 +0000
@@ -0,0 +1,105 @@
+/*
+ * 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.
+ */
+
+import java.util.ArrayList;
+import java.util.List;
+
+import sun.jvm.hotspot.HotSpotAgent;
+import sun.jvm.hotspot.utilities.ReversePtrsAnalysis;
+
+import jdk.test.lib.apps.LingeredApp;
+import jdk.test.lib.Asserts;
+import jdk.test.lib.JDKToolFinder;
+import jdk.test.lib.JDKToolLauncher;
+import jdk.test.lib.Platform;
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+import jdk.test.lib.Utils;
+
+/*
+ * @test
+ * @library /test/lib
+ * @requires os.family != "mac"
+ * @modules java.base/jdk.internal.misc
+ *          jdk.hotspot.agent/sun.jvm.hotspot
+ *          jdk.hotspot.agent/sun.jvm.hotspot.utilities
+ * @run main/othervm TestRevPtrsForInvokeDynamic
+ */
+
+public class TestRevPtrsForInvokeDynamic {
+
+    private static LingeredAppWithInvokeDynamic theApp = null;
+
+    private static void computeReversePointers(String pid) throws Exception {
+        HotSpotAgent agent = new HotSpotAgent();
+
+        try {
+            agent.attach(Integer.parseInt(pid));
+            ReversePtrsAnalysis analysis = new ReversePtrsAnalysis();
+            analysis.run();
+        } finally {
+            agent.detach();
+        }
+    }
+
+    private static void createAnotherToAttach(long lingeredAppPid)
+                                                         throws Exception {
+        String[] toolArgs = {
+            "--add-modules=jdk.hotspot.agent",
+            "--add-exports=jdk.hotspot.agent/sun.jvm.hotspot=ALL-UNNAMED",
+            "--add-exports=jdk.hotspot.agent/sun.jvm.hotspot.utilities=ALL-UNNAMED",
+            "TestRevPtrsForInvokeDynamic",
+            Long.toString(lingeredAppPid)
+        };
+
+        // Start a new process to attach to the lingered app
+        ProcessBuilder processBuilder = ProcessTools.createJavaProcessBuilder(toolArgs);
+        OutputAnalyzer SAOutput = ProcessTools.executeProcess(processBuilder);
+        SAOutput.shouldHaveExitValue(0);
+        System.out.println(SAOutput.getOutput());
+    }
+
+    public static void main (String... args) throws Exception {
+        if (!Platform.shouldSAAttach()) {
+            System.out.println(
+               "SA attach not expected to work - test skipped.");
+            return;
+        }
+
+        if (args == null || args.length == 0) {
+            try {
+                List<String> vmArgs = new ArrayList<String>();
+                vmArgs.add("-XX:+UsePerfData");
+                vmArgs.addAll(Utils.getVmOptions());
+
+                theApp = new LingeredAppWithInvokeDynamic();
+                LingeredApp.startApp(vmArgs, theApp);
+                createAnotherToAttach(theApp.getPid());
+            } finally {
+                LingeredApp.stopApp(theApp);
+            }
+        } else {
+            computeReversePointers(args[0]);
+        }
+    }
+}