--- /dev/null	2019-01-28 17:49:13.000000000 +0800
+++ new/test/testlibrary/whitebox/sun/hotspot/code/CodeBlob.java	2019-01-28 17:49:13.000000000 +0800
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 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.
+ */
+
+package sun.hotspot.code;
+
+import sun.hotspot.WhiteBox;
+
+public class CodeBlob {
+  private static final WhiteBox WB = WhiteBox.getWhiteBox();
+  public static CodeBlob[] getCodeBlobs(BlobType type) {
+    Object[] obj = WB.getCodeHeapEntries(type.id);
+    if (obj == null) {
+      return null;
+    }
+    CodeBlob[] result = new CodeBlob[obj.length];
+    for (int i = 0, n = result.length; i < n; ++i) {
+      result[i] = new CodeBlob((Object[]) obj[i]);
+    }
+    return result;
+  }
+  public static CodeBlob getCodeBlob(long addr) {
+    Object[] obj = WB.getCodeBlob(addr);
+    if (obj == null) {
+      return null;
+    }
+    return new CodeBlob(obj);
+  }
+  protected CodeBlob(Object[] obj) {
+    assert obj.length == 4;
+    name = (String) obj[0];
+    size = (Integer) obj[1];
+    int blob_type_index = (Integer) obj[2];
+    if (blob_type_index == -1) { // AOT
+      code_blob_type = null;
+    } else {
+      code_blob_type = BlobType.values()[blob_type_index];
+      assert code_blob_type.id == (Integer) obj[2];
+    }
+    address = (Long) obj[3];
+  }
+  public final String name;
+  public final int size;
+  public final BlobType code_blob_type;
+  public final long address;
+  @Override
+  public String toString() {
+    return "CodeBlob{"
+        + "name=" + name
+        + ", size=" + size
+        + ", code_blob_type=" + code_blob_type
+        + ", address=" + address
+        + '}';
+  }
+}