--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/cds/appcds/test-classes/GetFlightRecorder.java	Mon Jul 29 10:34:20 2019 -0400
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2016, 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.
+ *
+ * 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.io.File;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.List;
+
+import jdk.jfr.Event;
+import jdk.jfr.EventType;
+import jdk.jfr.FlightRecorder;
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordingFile;
+import jdk.jfr.consumer.RecordedEvent;
+
+public class GetFlightRecorder {
+    private static class TestEvent extends Event {
+    }
+    private static class SimpleEvent extends Event {
+        public int id;
+    }
+    public static void main(String args[]) throws Exception {
+        EventType type = EventType.getEventType(TestEvent.class); // This class is loaded before recording has started.
+        if (type.isEnabled()) {
+            throw new RuntimeException("Expected event to be disabled before recording start");
+        }
+
+        // (1) make sure you can obtain the flight recorder without error.
+        System.out.println("jdk.jfr.FlightRecorder.getFlightRecorder() = " + FlightRecorder.getFlightRecorder());
+
+        // (2) test that the event class loaded before recording can still work.
+        Recording r = new Recording();
+        r.start();
+        if (!type.isEnabled()) {
+            throw new RuntimeException("Expected event to be enabled during recording");
+        }
+        TestEvent testEvent = new TestEvent();
+        testEvent.commit();
+        loadEventClassDuringRecording();
+        r.stop();
+        if (type.isEnabled()) {
+            throw new RuntimeException("Expected event to be disabled after recording stopped");
+        }
+        System.out.println("Checking SimpleEvent");
+        hasEvent(r, SimpleEvent.class.getName());
+        System.out.println("OK");
+
+        System.out.println("Checking TestEvent");
+        hasEvent(r, TestEvent.class.getName());
+        System.out.println("OK");
+    }
+
+    // Classes that are loaded during a recording
+    // should get instrumentation on class load
+    private static void loadEventClassDuringRecording() {
+        SimpleEvent event = new SimpleEvent();
+        event.commit();
+    }
+
+    public static List<RecordedEvent> fromRecording(Recording recording) throws IOException {
+        return RecordingFile.readAllEvents(makeCopy(recording));
+    }
+
+    private static Path makeCopy(Recording recording) throws IOException {
+        Path p = recording.getDestination();
+        if (p == null) {
+            File directory = new File(".");
+            // FIXME: Must come up with a way to give human-readable name
+            // this will at least not clash when running parallel.
+            ProcessHandle h = ProcessHandle.current();
+            p = new File(directory.getAbsolutePath(), "recording-" + recording.getId() + "-pid" + h.pid() + ".jfr").toPath();
+            recording.dump(p);
+        }
+        return p;
+    }
+
+    public static void hasEvent(Recording r, String name) throws IOException {
+        List<RecordedEvent> events = fromRecording(r);
+        hasEvents(events);
+        hasEvent(events, name);
+    }
+
+    public static void hasEvents(List<RecordedEvent> events) {
+        if (events.isEmpty()) {
+            throw new RuntimeException("No events");
+        }
+    }
+
+    public static void hasEvent(List<RecordedEvent> events, String name) throws IOException {
+        if (!containsEvent(events, name)) {
+            throw new RuntimeException("Missing event " + name  + " in recording " + events.toString());
+        }
+    }
+
+    private static boolean containsEvent(List<RecordedEvent> events, String name) {
+        for (RecordedEvent event : events) {
+            if (event.getEventType().getName().equals(name)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}