--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.jvmci.options.processor/src/com/oracle/jvmci/options/processor/GraalJars.java	Thu May 28 21:58:33 2015 +0200
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 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 com.oracle.jvmci.options.processor;
+
+import java.io.*;
+import java.util.*;
+import java.util.stream.*;
+import java.util.zip.*;
+
+public class GraalJars implements Iterable<ZipEntry> {
+    private final List<ZipFile> jars = new ArrayList<>(2);
+
+    public GraalJars() {
+        String classPath = System.getProperty("java.class.path");
+        for (String e : classPath.split(File.pathSeparator)) {
+            if (e.endsWith(File.separatorChar + "graal.jar") || e.endsWith(File.separatorChar + "graal-truffle.jar")) {
+                try {
+                    jars.add(new ZipFile(e));
+                } catch (IOException ioe) {
+                    throw new InternalError(ioe);
+                }
+            }
+        }
+        if (jars.size() != 2) {
+            throw new InternalError("Could not find graal.jar or graal-truffle.jar on class path: " + classPath);
+        }
+    }
+
+    public Iterator<ZipEntry> iterator() {
+        Stream<ZipEntry> entries = jars.stream().flatMap(ZipFile::stream);
+        return entries.iterator();
+    }
+
+    public InputStream getInputStream(String classFilePath) throws IOException {
+        for (ZipFile jar : jars) {
+            ZipEntry entry = jar.getEntry(classFilePath);
+            if (entry != null) {
+                return jar.getInputStream(entry);
+            }
+        }
+        return null;
+    }
+}