--- /dev/null	2019-02-07 20:54:51.336000000 +0300
+++ new/test/lib/sun/hotspot/code/NMethod.java	2019-02-08 18:34:18.478595963 +0300
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2014, 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 sun.hotspot.code;
+
+import java.lang.reflect.Executable;
+import sun.hotspot.WhiteBox;
+
+public class NMethod extends CodeBlob {
+  private static final WhiteBox wb = WhiteBox.getWhiteBox();
+  public static NMethod get(Executable method, boolean isOsr) {
+    Object[] obj = wb.getNMethod(method, isOsr);
+    return obj == null ? null : new NMethod(obj);
+  }
+  private NMethod(Object[] obj) {
+    super((Object[])obj[0]);
+    assert obj.length == 5;
+    comp_level = (Integer) obj[1];
+    insts = (byte[]) obj[2];
+    compile_id = (Integer) obj[3];
+    entry_point = (Long) obj[4];
+  }
+  public final byte[] insts;
+  public final int comp_level;
+  public final int compile_id;
+  public final long entry_point;
+
+  @Override
+  public String toString() {
+    return "NMethod{"
+        + super.toString()
+        + ", insts=" + insts
+        + ", comp_level=" + comp_level
+        + ", compile_id=" + compile_id
+        + ", entry_point=" + entry_point
+        + '}';
+  }
+}