src/share/vm/memory/virtualspace.hpp

*** 1,7 ****
  /*
!  * Copyright (c) 1997, 2015, 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) 1997, 2016, 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.
*** 35,44 ****
--- 35,45 ----
    char*  _base;
    size_t _size;
    size_t _noaccess_prefix;
    size_t _alignment;
    bool   _special;
+   int    _backing_fd;
   private:
    bool   _executable;
  
    // ReservedSpace
    ReservedSpace(char* base, size_t size, size_t alignment, bool special,
*** 109,119 ****
    void initialize_compressed_heap(const size_t size, size_t alignment, bool large);
    // Create protection page at the beginning of the space.
    void establish_noaccess_prefix();
   public:
    // Constructor. Tries to find a heap that is good for compressed oops.
!   ReservedHeapSpace(size_t size, size_t forced_base_alignment, bool large);
    // Returns the base to be used for compression, i.e. so that null can be
    // encoded safely and implicit null checks can work.
    char *compressed_oop_base() { return _base - _noaccess_prefix; }
  };
  
--- 110,120 ----
    void initialize_compressed_heap(const size_t size, size_t alignment, bool large);
    // Create protection page at the beginning of the space.
    void establish_noaccess_prefix();
   public:
    // Constructor. Tries to find a heap that is good for compressed oops.
!   ReservedHeapSpace(size_t size, size_t forced_base_alignment, bool large, const char* backingFSforHeap = NULL);
    // Returns the base to be used for compression, i.e. so that null can be
    // encoded safely and implicit null checks can work.
    char *compressed_oop_base() { return _base - _noaccess_prefix; }
  };