1/*
2 * Copyright (c) 2014, 2015, 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 "gc/g1/g1CollectedHeap.inline.hpp"
27#include "gc/g1/g1OopClosures.inline.hpp"
28#include "gc/g1/g1ParScanThreadState.hpp"
29#include "gc/g1/g1_specialized_oop_closures.hpp"
30#include "memory/iterator.inline.hpp"
31#include "utilities/stack.inline.hpp"
32
33G1ParCopyHelper::G1ParCopyHelper(G1CollectedHeap* g1,  G1ParScanThreadState* par_scan_state) :
34  _g1(g1),
35  _par_scan_state(par_scan_state),
36  _worker_id(par_scan_state->worker_id()),
37  _scanned_klass(NULL),
38  _cm(_g1->concurrent_mark())
39{ }
40
41G1ScanClosureBase::G1ScanClosureBase(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) :
42  _g1(g1), _par_scan_state(par_scan_state), _from(NULL)
43{ }
44
45void G1KlassScanClosure::do_klass(Klass* klass) {
46  // If the klass has not been dirtied we know that there's
47  // no references into  the young gen and we can skip it.
48  if (!_process_only_dirty || klass->has_modified_oops()) {
49    // Clean the klass since we're going to scavenge all the metadata.
50    klass->clear_modified_oops();
51
52    // Tell the closure that this klass is the Klass to scavenge
53    // and is the one to dirty if oops are left pointing into the young gen.
54    _closure->set_scanned_klass(klass);
55
56    klass->oops_do(_closure);
57
58    _closure->set_scanned_klass(NULL);
59  }
60  _count++;
61}
62
63// Generate G1 specialized oop_oop_iterate functions.
64SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_G1(ALL_KLASS_OOP_OOP_ITERATE_DEFN)
65