/*

 * 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

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 */

#ifndef SHARE_GC_Z_ZVERIFY_HPP

#define SHARE_GC_Z_ZVERIFY_HPP

#include "memory/allocation.hpp"

class ZVerify : public AllStatic {

private:

  template <typename RootsIterator>

  static void roots_impl();

  static void roots(bool verify_weaks);

  static void roots_weak();

  static void roots_concurrent();

  static void roots_concurrent_weak();

  static void objects(bool verify_weaks);

  static void roots_and_objects(bool visit_weaks);

public:

  // Verify strong (non-concurrent) roots. Should always be good.

  // Verify all strong roots and references after marking.

  static void after_mark();

  // Verify strong and weak roots and references.

  static void after_weak_processing();

};

class VM_ZVerifyOperation : public VM_Operation {

public:

  virtual bool needs_inactive_gc_locker() const {

    // An inactive GC locker is needed in operations where we change the bad

    // mask or move objects. Changing the bad mask will invalidate all oops,

    // which makes it conceptually the same thing as moving all objects.

    return false;

  }

  virtual void doit() {

    ZVerify::after_weak_processing();

  }

  bool success() const {

    return true;

  }

  virtual VMOp_Type type() const { return VMOp_ZVerify; }

};

#endif // SHARE_GC_Z_ZVERIFY_HPP