/*

 * Copyright (c) 2000, 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.

 *

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#ifndef SHARE_GC_SERIAL_MARKSWEEP_INLINE_HPP

#define SHARE_GC_SERIAL_MARKSWEEP_INLINE_HPP

#include "classfile/classLoaderData.inline.hpp"

#include "gc/serial/markSweep.hpp"

#include "memory/universe.hpp"

#include "oops/markWord.inline.hpp"

#include "oops/access.inline.hpp"

#include "oops/compressedOops.inline.hpp"

#include "oops/oop.inline.hpp"

#include "utilities/align.hpp"

#include "utilities/stack.inline.hpp"

inline void MarkSweep::mark_object(oop obj) {

  // some marks may contain information we need to preserve so we store them away

  // and overwrite the mark.  We'll restore it at the end of markSweep.

  markWord mark = obj->mark_raw();

  obj->set_mark_raw(markWord::prototype().set_marked());

  if (obj->mark_must_be_preserved(mark)) {

    preserve_mark(obj, mark);

  }

}

template <class T> inline void MarkSweep::mark_and_push(T* p) {

  T heap_oop = RawAccess<>::oop_load(p);

  if (!CompressedOops::is_null(heap_oop)) {

    oop obj = CompressedOops::decode_not_null(heap_oop);

    if (!obj->mark_raw().is_marked()) {

      mark_object(obj);

      _marking_stack.push(obj);

    }

  }

}

inline void MarkSweep::follow_klass(Klass* klass) {

  oop op = klass->class_loader_data()->holder_no_keepalive();

  MarkSweep::mark_and_push(&op);

}

inline void MarkSweep::follow_cld(ClassLoaderData* cld) {

  MarkSweep::follow_cld_closure.do_cld(cld);

}

template <typename T>

inline void MarkAndPushClosure::do_oop_work(T* p)            { MarkSweep::mark_and_push(p); }

inline void MarkAndPushClosure::do_oop(oop* p)               { do_oop_work(p); }

inline void MarkAndPushClosure::do_oop(narrowOop* p)         { do_oop_work(p); }

inline void MarkAndPushClosure::do_klass(Klass* k)           { MarkSweep::follow_klass(k); }

inline void MarkAndPushClosure::do_cld(ClassLoaderData* cld) { MarkSweep::follow_cld(cld); }

template <class T> inline void MarkSweep::adjust_pointer(T* p) {

  T heap_oop = RawAccess<>::oop_load(p);

  if (!CompressedOops::is_null(heap_oop)) {

    oop obj = CompressedOops::decode_not_null(heap_oop);

    assert(Universe::heap()->is_in(obj), "should be in heap");

    oop new_obj = oop(obj->mark_raw().decode_pointer());

    assert(new_obj != NULL ||                          // is forwarding ptr?

           obj->mark_raw() == markWord::prototype() || // not gc marked?

           (UseBiasedLocking && obj->mark_raw().has_bias_pattern()),

           // not gc marked?

           "should be forwarded");

    if (new_obj != NULL) {

      assert(is_object_aligned(new_obj), "oop must be aligned");

      RawAccess<IS_NOT_NULL>::oop_store(p, new_obj);

    }

  }

}

template <typename T>

void AdjustPointerClosure::do_oop_work(T* p)           { MarkSweep::adjust_pointer(p); }

inline void AdjustPointerClosure::do_oop(oop* p)       { do_oop_work(p); }

inline void AdjustPointerClosure::do_oop(narrowOop* p) { do_oop_work(p); }

inline int MarkSweep::adjust_pointers(oop obj) {

  return obj->oop_iterate_size(&MarkSweep::adjust_pointer_closure);

}

#endif // SHARE_GC_SERIAL_MARKSWEEP_INLINE_HPP