/*

 * 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 "gc/g1/g1CollectedHeap.hpp"

#include "gc/g1/g1FullCollector.hpp"

#include "gc/g1/g1FullGCMarker.hpp"

#include "gc/g1/g1FullGCMarkTask.hpp"

#include "gc/g1/g1FullGCOopClosures.inline.hpp"

#include "gc/g1/g1FullGCReferenceProcessorExecutor.hpp"

#include "gc/shared/gcTraceTime.inline.hpp"

#include "gc/shared/referenceProcessor.hpp"

G1FullGCMarkTask::G1FullGCMarkTask(G1FullCollector* collector) :

    G1FullGCTask("G1 Parallel Marking Task", collector),

    _root_processor(G1CollectedHeap::heap(), collector->workers()),

    _terminator(collector->workers(), collector->array_queue_set()) {

  // Need cleared claim bits for the roots processing

  ClassLoaderDataGraph::clear_claimed_marks();

}

void G1FullGCMarkTask::work(uint worker_id) {

  Ticks start = Ticks::now();

  ResourceMark rm;

  G1FullGCMarker* marker = collector()->marker(worker_id);

  MarkingCodeBlobClosure code_closure(marker->mark_closure(), !CodeBlobToOopClosure::FixRelocations);

  if (ClassUnloading) {

    _root_processor.process_strong_roots(

        marker->mark_closure(),

        marker->cld_closure(),

        &code_closure);

  } else {

    _root_processor.process_all_roots_no_string_table(

        marker->mark_closure(),

        marker->cld_closure(),

        &code_closure);

  }

  // Mark stack is populated, now process and drain it.

  marker->complete_marking(collector()->oop_queue_set(), collector()->array_queue_set(), &_terminator);

  // This is the point where the entire marking should have completed.

  assert(marker->oop_stack()->is_empty(), "Marking should have completed");

  assert(marker->objarray_stack()->is_empty(), "Array marking should have completed");

  log_task("Marking task", worker_id, start);

}