/*

 * Copyright (c) 2017, 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.

 *

 */

#include "precompiled.hpp"

#include "classfile/classLoaderData.hpp"

#include "gc/g1/g1FullGCMarker.inline.hpp"

#include "gc/shared/referenceProcessor.hpp"

#include "gc/shared/verifyOption.hpp"

#include "memory/iterator.inline.hpp"

G1FullGCMarker::G1FullGCMarker(uint worker_id, PreservedMarks* preserved_stack, G1CMBitMap* bitmap) :

    _worker_id(worker_id),

    _bitmap(bitmap),

    _oop_stack(),

    _objarray_stack(),

    _preserved_stack(preserved_stack),

    _mark_closure(worker_id, this, G1CollectedHeap::heap()->ref_processor_stw()),

    _verify_closure(VerifyOption_G1UseFullMarking),

    _stack_closure(this),

    _cld_closure(mark_closure(), ClassLoaderData::_claim_strong) {

  _oop_stack.initialize();

  _objarray_stack.initialize();

}

G1FullGCMarker::~G1FullGCMarker() {

  assert(is_empty(), "Must be empty at this point");

}

void G1FullGCMarker::complete_marking(OopQueueSet* oop_stacks,

                                      ObjArrayTaskQueueSet* array_stacks,

                                      ParallelTaskTerminator* terminator) {

  do {

    drain_stack();

    ObjArrayTask steal_array;

    if (array_stacks->steal(_worker_id, steal_array)) {

      follow_array_chunk(objArrayOop(steal_array.obj()), steal_array.index());

    } else {

      oop steal_oop;

      if (oop_stacks->steal(_worker_id, steal_oop)) {

        follow_object(steal_oop);

      }

    }

  } while (!is_empty() || !terminator->offer_termination());

}