src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/types/basic/BasicTypeDataBase.java

*** 1,7 ****
  /*
!  * Copyright (c) 2000, 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.
--- 1,7 ----
  /*
!  * Copyright (c) 2000, 2018, 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.
*** 31,40 ****
--- 31,41 ----
  import sun.jvm.hotspot.debugger.Address;
  import sun.jvm.hotspot.debugger.MachineDescription;
  import sun.jvm.hotspot.runtime.VM;
  import sun.jvm.hotspot.types.Type;
  import sun.jvm.hotspot.types.TypeDataBase;
+ import sun.jvm.hotspot.memory.FileMapInfo;
  
  /** <P> This is a basic implementation of the TypeDataBase interface.
      It allows an external type database builder to add types to be
      consumed by a client through the Type interfaces. It has no
      knowledge of symbol lookup; for example, the builder is
*** 292,301 ****
--- 293,311 ----
      // required that the caller knows that the static type is at least
      // baseType.  See the notes in guessTypeForAddress for the logic of
      // the locations searched.
  
      Address loc1 = addr.getAddressAt(0);
+ 
+     if (VM.getVM().isSharingEnabled()) {
+       // Check if the value falls in the _md_region
+       FileMapInfo cdsFileMapInfo = VM.getVM().getFileMapInfo();
+       if (cdsFileMapInfo.inCopiedVtableSpace(loc1) == true) {
+          return cdsFileMapInfo.getTypeForVptrAddress(loc1);
+       }
+     }
+ 
      Address loc2 = null;
      Address loc3 = null;
      long offset2 = baseType.getSize();
      // I don't think this should be misaligned under any
      // circumstances, but I'm not sure (FIXME: also not sure which