--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/profiling/unloadingconflict/TestProfileConflictClassUnloading.java	Wed Nov 13 13:45:50 2013 +0100
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2013, 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.
+ */
+
+/*
+ * @test
+ * @bug 8027572
+ * @summary class unloading resets profile, method compiled after the profile is first set and before class loading sets unknown bit with not recorded class
+ * @build B
+ * @run main/othervm -XX:TypeProfileLevel=222 -XX:-BackgroundCompilation TestProfileConflictClassUnloading
+ *
+ */
+
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.nio.file.Paths;
+
+public class TestProfileConflictClassUnloading {
+    static class A {
+    }
+
+
+    static void m1(Object o) {
+    }
+
+    static void m2(Object o) {
+        m1(o);
+    }
+
+    static void m3(A a, boolean do_call) {
+        if (!do_call) {
+            return;
+        }
+        m2(a);
+    }
+
+    public static ClassLoader newClassLoader() {
+        try {
+            return new URLClassLoader(new URL[] {
+                    Paths.get(System.getProperty("test.classes",".")).toUri().toURL(),
+            }, null);
+        } catch (MalformedURLException e){
+            throw new RuntimeException("Unexpected URL conversion failure", e);
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        ClassLoader loader = newClassLoader();
+        Object o = loader.loadClass("B").newInstance();
+        // collect conflicting profiles
+        for (int i = 0; i < 5000; i++) {
+            m2(o);
+        }
+        // prepare for conflict
+        A a = new A();
+        for (int i = 0; i < 5000; i++) {
+            m3(a, false);
+        }
+        // unload class in profile
+        o = null;
+        loader = null;
+        System.gc();
+        // record the conflict
+        m3(a, true);
+        // trigger another GC
+        System.gc();
+    }
+}