1 /*
2 * Copyright (c) 2019, 2020, Red Hat, Inc. 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 *
31 #include "gc/shenandoah/shenandoahBarrierSet.hpp"
32 #include "gc/shenandoah/shenandoahEvacOOMHandler.inline.hpp"
33 #include "gc/shenandoah/shenandoahMarkingContext.inline.hpp"
34 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
35 #include "gc/shenandoah/shenandoahNMethod.inline.hpp"
36 #include "memory/iterator.inline.hpp"
37 #include "oops/compressedOops.inline.hpp"
38 #include "runtime/atomic.hpp"
39 #include "runtime/javaThread.hpp"
40
41 ShenandoahForwardedIsAliveClosure::ShenandoahForwardedIsAliveClosure() :
42 _mark_context(ShenandoahHeap::heap()->marking_context()) {
43 }
44
45 bool ShenandoahForwardedIsAliveClosure::do_object_b(oop obj) {
46 if (CompressedOops::is_null(obj)) {
47 return false;
48 }
49 obj = ShenandoahBarrierSet::resolve_forwarded_not_null(obj);
50 shenandoah_assert_not_forwarded_if(nullptr, obj, ShenandoahHeap::heap()->is_concurrent_mark_in_progress());
51 return _mark_context->is_marked(obj);
52 }
53
54 ShenandoahIsAliveClosure::ShenandoahIsAliveClosure() :
55 _mark_context(ShenandoahHeap::heap()->marking_context()) {
56 }
57
58 bool ShenandoahIsAliveClosure::do_object_b(oop obj) {
59 if (CompressedOops::is_null(obj)) {
60 return false;
61 }
62 shenandoah_assert_not_forwarded(nullptr, obj);
63 return _mark_context->is_marked(obj);
64 }
65
66 BoolObjectClosure* ShenandoahIsAliveSelector::is_alive_closure() {
67 return ShenandoahHeap::heap()->has_forwarded_objects() ?
68 reinterpret_cast<BoolObjectClosure*>(&_fwd_alive_cl) :
69 reinterpret_cast<BoolObjectClosure*>(&_alive_cl);
70 }
71
72 void ShenandoahOopClosureBase::do_nmethod(nmethod* nm) {
73 nm->run_nmethod_entry_barrier();
74 }
75
76 ShenandoahKeepAliveClosure::ShenandoahKeepAliveClosure() :
77 _bs(ShenandoahBarrierSet::barrier_set()) {
78 }
79
80 void ShenandoahKeepAliveClosure::do_oop(oop* p) {
81 do_oop_work(p);
82 }
83
84 void ShenandoahKeepAliveClosure::do_oop(narrowOop* p) {
85 do_oop_work(p);
86 }
87
88 template <typename T>
89 void ShenandoahKeepAliveClosure::do_oop_work(T* p) {
90 assert(ShenandoahHeap::heap()->is_concurrent_mark_in_progress(), "Only for concurrent marking phase");
91 assert(!ShenandoahHeap::heap()->has_forwarded_objects(), "Not expected");
92
93 T o = RawAccess<>::oop_load(p);
94 if (!CompressedOops::is_null(o)) {
95 oop obj = CompressedOops::decode_not_null(o);
96 _bs->enqueue(obj);
97 }
98 }
99
100 ShenandoahUpdateRefsClosure::ShenandoahUpdateRefsClosure() :
101 _heap(ShenandoahHeap::heap()) {
102 }
103
104 template <class T>
105 void ShenandoahUpdateRefsClosure::do_oop_work(T* p) {
106 _heap->update_with_forwarded(p);
107 }
108
109 void ShenandoahUpdateRefsClosure::do_oop(oop* p) { do_oop_work(p); }
110 void ShenandoahUpdateRefsClosure::do_oop(narrowOop* p) { do_oop_work(p); }
111
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1 /*
2 * Copyright (c) 2019, 2020, Red Hat, Inc. All rights reserved.
3 * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
32 #include "gc/shenandoah/shenandoahBarrierSet.hpp"
33 #include "gc/shenandoah/shenandoahEvacOOMHandler.inline.hpp"
34 #include "gc/shenandoah/shenandoahMarkingContext.inline.hpp"
35 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
36 #include "gc/shenandoah/shenandoahNMethod.inline.hpp"
37 #include "memory/iterator.inline.hpp"
38 #include "oops/compressedOops.inline.hpp"
39 #include "runtime/atomic.hpp"
40 #include "runtime/javaThread.hpp"
41
42 ShenandoahForwardedIsAliveClosure::ShenandoahForwardedIsAliveClosure() :
43 _mark_context(ShenandoahHeap::heap()->marking_context()) {
44 }
45
46 bool ShenandoahForwardedIsAliveClosure::do_object_b(oop obj) {
47 if (CompressedOops::is_null(obj)) {
48 return false;
49 }
50 obj = ShenandoahBarrierSet::resolve_forwarded_not_null(obj);
51 shenandoah_assert_not_forwarded_if(nullptr, obj, ShenandoahHeap::heap()->is_concurrent_mark_in_progress());
52 return _mark_context->is_marked_or_old(obj);
53 }
54
55 ShenandoahIsAliveClosure::ShenandoahIsAliveClosure() :
56 _mark_context(ShenandoahHeap::heap()->marking_context()) {
57 }
58
59 bool ShenandoahIsAliveClosure::do_object_b(oop obj) {
60 if (CompressedOops::is_null(obj)) {
61 return false;
62 }
63 shenandoah_assert_not_forwarded(nullptr, obj);
64 return _mark_context->is_marked_or_old(obj);
65 }
66
67 BoolObjectClosure* ShenandoahIsAliveSelector::is_alive_closure() {
68 return ShenandoahHeap::heap()->has_forwarded_objects() ?
69 reinterpret_cast<BoolObjectClosure*>(&_fwd_alive_cl) :
70 reinterpret_cast<BoolObjectClosure*>(&_alive_cl);
71 }
72
73 void ShenandoahOopClosureBase::do_nmethod(nmethod* nm) {
74 nm->run_nmethod_entry_barrier();
75 }
76
77 ShenandoahKeepAliveClosure::ShenandoahKeepAliveClosure() :
78 _bs(ShenandoahBarrierSet::barrier_set()) {
79 }
80
81 void ShenandoahKeepAliveClosure::do_oop(oop* p) {
82 do_oop_work(p);
83 }
84
85 void ShenandoahKeepAliveClosure::do_oop(narrowOop* p) {
86 do_oop_work(p);
87 }
88
89 template <typename T>
90 void ShenandoahKeepAliveClosure::do_oop_work(T* p) {
91 assert(ShenandoahHeap::heap()->is_concurrent_mark_in_progress(), "Only for concurrent marking phase");
92 assert(ShenandoahHeap::heap()->is_concurrent_old_mark_in_progress() || !ShenandoahHeap::heap()->has_forwarded_objects(), "Not expected");
93
94 T o = RawAccess<>::oop_load(p);
95 if (!CompressedOops::is_null(o)) {
96 oop obj = CompressedOops::decode_not_null(o);
97 _bs->enqueue(obj);
98 }
99 }
100
101 ShenandoahUpdateRefsClosure::ShenandoahUpdateRefsClosure() :
102 _heap(ShenandoahHeap::heap()) {
103 }
104
105 template <class T>
106 void ShenandoahUpdateRefsClosure::do_oop_work(T* p) {
107 _heap->update_with_forwarded(p);
108 }
109
110 void ShenandoahUpdateRefsClosure::do_oop(oop* p) { do_oop_work(p); }
111 void ShenandoahUpdateRefsClosure::do_oop(narrowOop* p) { do_oop_work(p); }
112
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