/*

 * 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.

 *

 */

#ifndef SHARE_VM_MEMORY_DYNAMICARCHIVE_HPP

#define SHARE_VM_MEMORY_DYNAMICARCHIVE_HPP

#if INCLUDE_CDS

#include "classfile/compactHashtable.hpp"

#include "memory/allocation.hpp"

#include "memory/filemap.hpp"

#include "memory/memRegion.hpp"

#include "memory/virtualspace.hpp"

#include "oops/oop.hpp"

#include "utilities/exceptions.hpp"

#include "utilities/macros.hpp"

#include "utilities/resourceHash.hpp"

class DynamicArchiveHeader : public FileMapHeader {

  friend class CDSOffsets;

private:

  int _base_header_crc;

  int _base_region_crc[MetaspaceShared::n_regions];

public:

  int base_header_crc() const { return _base_header_crc; }

  int base_region_crc(int i) const {

    assert(is_valid_region(i), "must be");

    return _base_region_crc[i];

  }

  void set_base_header_crc(int c) { _base_header_crc = c; }

  void set_base_region_crc(int i, int c) {

    assert(is_valid_region(i), "must be");

    _base_region_crc[i] = c;

  }

};

class DynamicArchive : AllStatic {

  static class DynamicArchiveBuilder* _builder;

  static address original_to_target_impl(address orig_obj);

  static address original_to_buffer_impl(address orig_obj);

  static address buffer_to_target_impl(address buff_obj);

public:

  static void dump();

  // obj is a copy of a MetaspaceObj, stored in the dumping buffer.

  //

  // The return value is the runtime targeted location of this object as

  // mapped from the dynamic archive.

  template <typename T> static T buffer_to_target(T buff_obj) {

    return (T)buffer_to_target_impl(address(buff_obj));

  }

  // obj is an original MetaspaceObj used by the JVM (e.g., a valid Symbol* in the

  // SymbolTable).

  //

  // The return value is the runtime targeted location of this object as

  // mapped from the dynamic archive.

  template <typename T> static T original_to_target(T obj) {

    return (T)original_to_target_impl(address(obj));

  }

  // obj is an original MetaspaceObj use by the JVM (e.g., a valid Symbol* in the

  // SymbolTable).

  //

  // The return value is the location of this object in the dump time

  // buffer space

  template <typename T> static T original_to_buffer(T obj) {

    return (T)original_to_buffer_impl(address(obj));

  }

  // Delta of this object from SharedBaseAddress

  static uintx object_delta_uintx(void* buff_obj);

  // Does obj point to an address inside the runtime target space of the dynamic

  // archive?

  static bool is_in_target_space(void *obj);

  static address map();

  static bool is_mapped();

  static bool validate(FileMapInfo* dynamic_info);

  static void disable();

private:

  static address map_impl(FileMapInfo* mapinfo);

  static void map_failed(FileMapInfo* mapinfo);

};

#endif // INCLUDE_CDS

#endif // SHARE_VM_MEMORY_DYNAMICARCHIVE_HPP