--- /dev/null	2015-10-08 07:26:03.000000000 -1000
+++ new/src/jdk.vm.ci/share/classes/jdk.vm.ci.options/src/jdk/vm/ci/options/JVMCIJarsOptionDescriptorsProvider.java	2015-10-08 07:26:03.000000000 -1000
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2014, 2015, 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.options;
+
+import java.io.*;
+import java.util.*;
+import java.util.jar.*;
+import java.util.zip.*;
+
+import jdk.vm.ci.options.OptionsParser.*;
+
+/**
+ * Access to the {@link OptionDescriptors} declared by
+ * {@code META-INF/services/jdk.vm.ci.options.OptionDescriptors} files in {@code
+ * <jre>/lib/jvmci/*.jar}.
+ */
+class JVMCIJarsOptionDescriptorsProvider implements OptionDescriptorsProvider {
+
+    static final String OptionDescriptorsServiceFile = "META-INF/services/" + OptionDescriptors.class.getName();
+
+    private final Iterator<File> jars;
+    private final List<OptionDescriptors> optionsDescriptorsList;
+
+    JVMCIJarsOptionDescriptorsProvider() {
+        List<File> jarsList = findJVMCIJars();
+        this.jars = jarsList.iterator();
+        this.optionsDescriptorsList = new ArrayList<>(jarsList.size() * 3);
+    }
+
+    /**
+     * Finds the list of JVMCI jars.
+     */
+    private static List<File> findJVMCIJars() {
+        File javaHome = new File(System.getProperty("java.home"));
+        File lib = new File(javaHome, "lib");
+        File jvmci = new File(lib, "jvmci");
+
+        List<File> jarFiles = new ArrayList<>();
+        if (jvmci.exists()) {
+            for (String fileName : jvmci.list()) {
+                if (fileName.endsWith(".jar")) {
+                    File file = new File(jvmci, fileName);
+                    if (file.isDirectory()) {
+                        continue;
+                    }
+                    jarFiles.add(file);
+                }
+            }
+        }
+        return jarFiles;
+    }
+
+    public OptionDescriptor get(String name) {
+        // Look up loaded option descriptors first
+        for (OptionDescriptors optionDescriptors : optionsDescriptorsList) {
+            OptionDescriptor desc = optionDescriptors.get(name);
+            if (desc != null) {
+                return desc;
+            }
+        }
+        while (jars.hasNext()) {
+            File path = jars.next();
+            try (JarFile jar = new JarFile(path)) {
+                ZipEntry entry = jar.getEntry(OptionDescriptorsServiceFile);
+                if (entry != null) {
+                    BufferedReader br = new BufferedReader(new InputStreamReader(jar.getInputStream(entry)));
+                    String line = null;
+                    OptionDescriptor desc = null;
+                    while ((line = br.readLine()) != null) {
+                        OptionDescriptors options;
+                        try {
+                            options = (OptionDescriptors) Class.forName(line).newInstance();
+                            optionsDescriptorsList.add(options);
+                            if (desc == null) {
+                                desc = options.get(name);
+                            }
+                        } catch (Exception e) {
+                            throw new InternalError("Error instantiating class " + line + " read from " + path, e);
+                        }
+                    }
+                    if (desc != null) {
+                        return desc;
+                    }
+                }
+            } catch (IOException e) {
+                throw new InternalError("Error reading " + path, e);
+            }
+        }
+        return null;
+    }
+}