1/*
2 * Copyright (c) 2017, 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/classLoaderData.hpp"
27#include "gc/g1/g1FullGCMarker.inline.hpp"
28#include "gc/shared/referenceProcessor.hpp"
29#include "gc/shared/verifyOption.hpp"
30#include "memory/iterator.inline.hpp"
31
32G1FullGCMarker::G1FullGCMarker(uint worker_id, PreservedMarks* preserved_stack, G1CMBitMap* bitmap) :
33 _worker_id(worker_id),
34 _bitmap(bitmap),
35 _oop_stack(),
36 _objarray_stack(),
37 _preserved_stack(preserved_stack),
38 _mark_closure(worker_id, this, G1CollectedHeap::heap()->ref_processor_stw()),
39 _verify_closure(VerifyOption_G1UseFullMarking),
40 _stack_closure(this),
41 _cld_closure(mark_closure(), ClassLoaderData::_claim_strong) {
42 _oop_stack.initialize();
43 _objarray_stack.initialize();
44}
45
46G1FullGCMarker::~G1FullGCMarker() {
47 assert(is_empty(), "Must be empty at this point");
48}
49
50void G1FullGCMarker::complete_marking(OopQueueSet* oop_stacks,
51 ObjArrayTaskQueueSet* array_stacks,
52 ParallelTaskTerminator* terminator) {
53 do {
54 drain_stack();
55 ObjArrayTask steal_array;
56 if (array_stacks->steal(_worker_id, steal_array)) {
57 follow_array_chunk(objArrayOop(steal_array.obj()), steal_array.index());
58 } else {
59 oop steal_oop;
60 if (oop_stacks->steal(_worker_id, steal_oop)) {
61 follow_object(steal_oop);
62 }
63 }
64 } while (!is_empty() || !terminator->offer_termination());
65}
66