/*

 * Copyright (c) 2019, Red Hat, Inc. All rights reserved.

 *

 * 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_GC_SHENANDOAH_SHENANDOAHROOTVERIFIER_HPP

#define SHARE_GC_SHENANDOAH_SHENANDOAHROOTVERIFIER_HPP

#include "memory/allocation.hpp"

#include "memory/iterator.hpp"

class ShenandoahRootVerifier : public StackObj {

public:

  enum RootTypes {

    SerialRoots         = 1 << 0,

    ThreadRoots         = 1 << 1,

    CodeRoots           = 1 << 2,

    CLDGRoots           = 1 << 3,

    WeakRoots           = 1 << 4,

    StringDedupRoots    = 1 << 5,

    JNIHandleRoots      = 1 << 6,

    AllRoots            = (SerialRoots | ThreadRoots | CodeRoots | CLDGRoots | WeakRoots | StringDedupRoots | JNIHandleRoots)

  };

private:

  RootTypes _types;

public:

  ShenandoahRootVerifier();

  void excludes(RootTypes types);

  void oops_do(OopClosure* cl);

  // Used to seed ShenandoahVerifier, do not honor root type filter

  void roots_do(OopClosure* cl);

  void strong_roots_do(OopClosure* cl);

  static RootTypes combine(RootTypes t1, RootTypes t2);

private:

  bool verify(RootTypes type) const;

};

#endif // SHARE_GC_SHENANDOAH_SHENANDOAHROOTVERIFIER_HPP