1/*
2 * Copyright (c) 2019, Red Hat, Inc. All rights reserved.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.
7 *
8 * This code is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
23#ifndef SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_INLINE_HPP
24#define SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_INLINE_HPP
25
26#include "gc/shenandoah/shenandoahAsserts.hpp"
27#include "gc/shenandoah/shenandoahClosures.hpp"
28#include "gc/shenandoah/shenandoahHeap.inline.hpp"
29#include "oops/compressedOops.inline.hpp"
30#include "runtime/thread.hpp"
31
32ShenandoahForwardedIsAliveClosure::ShenandoahForwardedIsAliveClosure() :
33 _mark_context(ShenandoahHeap::heap()->marking_context()) {
34}
35
36bool ShenandoahForwardedIsAliveClosure::do_object_b(oop obj) {
37 if (CompressedOops::is_null(obj)) {
38 return false;
39 }
40 obj = ShenandoahBarrierSet::resolve_forwarded_not_null(obj);
41 shenandoah_assert_not_forwarded_if(NULL, obj,
42 (ShenandoahHeap::heap()->is_concurrent_mark_in_progress() ||
43 ShenandoahHeap::heap()->is_concurrent_traversal_in_progress()));
44 return _mark_context->is_marked(obj);
45}
46
47ShenandoahIsAliveClosure::ShenandoahIsAliveClosure() :
48 _mark_context(ShenandoahHeap::heap()->marking_context()) {
49}
50
51bool ShenandoahIsAliveClosure::do_object_b(oop obj) {
52 if (CompressedOops::is_null(obj)) {
53 return false;
54 }
55 shenandoah_assert_not_forwarded(NULL, obj);
56 return _mark_context->is_marked(obj);
57}
58
59BoolObjectClosure* ShenandoahIsAliveSelector::is_alive_closure() {
60 return ShenandoahHeap::heap()->has_forwarded_objects() ?
61 reinterpret_cast<BoolObjectClosure*>(&_fwd_alive_cl) :
62 reinterpret_cast<BoolObjectClosure*>(&_alive_cl);
63}
64
65ShenandoahUpdateRefsClosure::ShenandoahUpdateRefsClosure() :
66 _heap(ShenandoahHeap::heap()) {
67}
68
69template <class T>
70void ShenandoahUpdateRefsClosure::do_oop_work(T* p) {
71 T o = RawAccess<>::oop_load(p);
72 if (!CompressedOops::is_null(o)) {
73 oop obj = CompressedOops::decode_not_null(o);
74 _heap->update_with_forwarded_not_null(p, obj);
75 }
76}
77
78void ShenandoahUpdateRefsClosure::do_oop(oop* p) { do_oop_work(p); }
79void ShenandoahUpdateRefsClosure::do_oop(narrowOop* p) { do_oop_work(p); }
80
81ShenandoahEvacuateUpdateRootsClosure::ShenandoahEvacuateUpdateRootsClosure() :
82 _heap(ShenandoahHeap::heap()), _thread(Thread::current()) {
83}
84
85template <class T>
86void ShenandoahEvacuateUpdateRootsClosure::do_oop_work(T* p) {
87 assert(_heap->is_evacuation_in_progress(), "Only do this when evacuation is in progress");
88
89 T o = RawAccess<>::oop_load(p);
90 if (! CompressedOops::is_null(o)) {
91 oop obj = CompressedOops::decode_not_null(o);
92 if (_heap->in_collection_set(obj)) {
93 shenandoah_assert_marked(p, obj);
94 oop resolved = ShenandoahBarrierSet::resolve_forwarded_not_null(obj);
95 if (oopDesc::equals_raw(resolved, obj)) {
96 resolved = _heap->evacuate_object(obj, _thread);
97 }
98 RawAccess<IS_NOT_NULL>::oop_store(p, resolved);
99 }
100 }
101}
102void ShenandoahEvacuateUpdateRootsClosure::do_oop(oop* p) {
103 do_oop_work(p);
104}
105
106void ShenandoahEvacuateUpdateRootsClosure::do_oop(narrowOop* p) {
107 do_oop_work(p);
108}
109
110#ifdef ASSERT
111template <class T>
112void ShenandoahAssertNotForwardedClosure::do_oop_work(T* p) {
113 T o = RawAccess<>::oop_load(p);
114 if (!CompressedOops::is_null(o)) {
115 oop obj = CompressedOops::decode_not_null(o);
116 shenandoah_assert_not_forwarded(p, obj);
117 }
118}
119
120void ShenandoahAssertNotForwardedClosure::do_oop(narrowOop* p) { do_oop_work(p); }
121void ShenandoahAssertNotForwardedClosure::do_oop(oop* p) { do_oop_work(p); }
122#endif
123
124#endif // SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP
125