--- /dev/null	2018-06-17 23:18:20.806999507 +0800
+++ new/test/jdk/jfr/startupargs/StartupHelper.java	2019-01-29 11:05:37.270118613 +0800
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2013, 2019, 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 jdk.jfr.startupargs;
+
+import java.io.IOException;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import jdk.jfr.FlightRecorder;
+import jdk.jfr.Recording;
+import jdk.testlibrary.Asserts;
+import jdk.testlibrary.dcmd.CommandExecutor;
+import jdk.testlibrary.dcmd.PidJcmdExecutor;
+import jdk.testlibrary.OutputAnalyzer;
+
+
+
+public class StartupHelper {
+
+    public static Recording getRecording(String name) {
+        for (Recording r : FlightRecorder.getFlightRecorder().getRecordings()) {
+            System.out.println("Recording=" + r.getName());
+            if (name.equals(r.getName())) {
+                return r;
+            }
+        }
+        Asserts.fail("No recording with name " + name);
+        return null;
+    }
+
+    public static List<Path> listFilesInDir(Path root) throws IOException {
+        List<Path> paths = new ArrayList<>();
+        List<Path> searchPaths = new ArrayList<>();
+        searchPaths.add(root);
+
+        while (!searchPaths.isEmpty()) {
+            Path currRoot = searchPaths.remove(searchPaths.size() - 1);
+            DirectoryStream<Path> contents = Files.newDirectoryStream(currRoot);
+            for (Path path : contents) {
+                paths.add(path);
+                if (Files.isDirectory(path)) {
+                    searchPaths.add(path);
+                }
+            }
+        }
+
+        System.out.println("Files in '" + root + "':");
+        for (Path path : paths) {
+            System.out.println("  path: " + path);
+        }
+        return paths;
+    }
+
+    public static Path findRecordingFileInRepo(Path baseLocation) throws IOException {
+        // Check that repo contains a file ending in "jfr" or "part"
+        for (Path path : listFilesInDir(baseLocation)) {
+            if (Files.isRegularFile(path)) {
+                String filename = path.toString();
+                if (filename.endsWith("jfr") || filename.endsWith("part")) {
+                    return path;
+                }
+            }
+        }
+        return null;
+    }
+
+    public static OutputAnalyzer jcmd(String... args) {
+        String argsString = Arrays.stream(args).collect(Collectors.joining(" "));
+        CommandExecutor executor = new PidJcmdExecutor();
+        OutputAnalyzer oa = executor.execute(argsString);
+        oa.shouldHaveExitValue(0);
+        return oa;
+    }
+
+    public static OutputAnalyzer jcmdCheck(String recordingName) {
+        return jcmd("JFR.check", "name=" + recordingName, "verbose=true");
+    }
+}