1/*
2 * Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#include "precompiled.hpp"
26#include "classfile/classLoaderDataGraph.hpp"
27#include "gc/g1/g1CollectedHeap.hpp"
28#include "gc/g1/g1FullCollector.hpp"
29#include "gc/g1/g1FullGCMarker.hpp"
30#include "gc/g1/g1FullGCMarkTask.hpp"
31#include "gc/g1/g1FullGCOopClosures.inline.hpp"
32#include "gc/g1/g1FullGCReferenceProcessorExecutor.hpp"
33#include "gc/shared/gcTraceTime.inline.hpp"
34#include "gc/shared/referenceProcessor.hpp"
35#include "memory/iterator.inline.hpp"
36
37G1FullGCMarkTask::G1FullGCMarkTask(G1FullCollector* collector) :
38 G1FullGCTask("G1 Parallel Marking Task", collector),
39 _root_processor(G1CollectedHeap::heap(), collector->workers()),
40 _terminator(collector->workers(), collector->array_queue_set()) {
41 // Need cleared claim bits for the roots processing
42 ClassLoaderDataGraph::clear_claimed_marks();
43}
44
45void G1FullGCMarkTask::work(uint worker_id) {
46 Ticks start = Ticks::now();
47 ResourceMark rm;
48 G1FullGCMarker* marker = collector()->marker(worker_id);
49 MarkingCodeBlobClosure code_closure(marker->mark_closure(), !CodeBlobToOopClosure::FixRelocations);
50
51 if (ClassUnloading) {
52 _root_processor.process_strong_roots(marker->mark_closure(),
53 marker->cld_closure(),
54 &code_closure);
55 } else {
56 _root_processor.process_all_roots(marker->mark_closure(),
57 marker->cld_closure(),
58 &code_closure);
59 }
60
61 // Mark stack is populated, now process and drain it.
62 marker->complete_marking(collector()->oop_queue_set(), collector()->array_queue_set(), _terminator.terminator());
63
64 // This is the point where the entire marking should have completed.
65 assert(marker->oop_stack()->is_empty(), "Marking should have completed");
66 assert(marker->objarray_stack()->is_empty(), "Array marking should have completed");
67 log_task("Marking task", worker_id, start);
68}
69