1 /*
2 * Copyright (c) 2019, 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 *
23 */
24 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_INLINE_HPP
25 #define SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_INLINE_HPP
26
27 #include "gc/shared/barrierSetNMethod.hpp"
28 #include "gc/shenandoah/shenandoahAsserts.hpp"
29 #include "gc/shenandoah/shenandoahClosures.hpp"
30 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
31 #include "gc/shenandoah/shenandoahNMethod.inline.hpp"
32 #include "gc/shenandoah/shenandoahTraversalGC.hpp"
33 #include "oops/compressedOops.inline.hpp"
34 #include "runtime/atomic.hpp"
35 #include "runtime/thread.hpp"
36
37 ShenandoahForwardedIsAliveClosure::ShenandoahForwardedIsAliveClosure() :
38 _mark_context(ShenandoahHeap::heap()->marking_context()) {
39 }
40
41 bool ShenandoahForwardedIsAliveClosure::do_object_b(oop obj) {
42 if (CompressedOops::is_null(obj)) {
43 return false;
44 }
45 obj = ShenandoahBarrierSet::resolve_forwarded_not_null(obj);
46 shenandoah_assert_not_forwarded_if(NULL, obj,
47 (ShenandoahHeap::heap()->is_concurrent_mark_in_progress() ||
48 ShenandoahHeap::heap()->is_concurrent_traversal_in_progress()));
49 return _mark_context->is_marked(obj);
50 }
51
52 ShenandoahIsAliveClosure::ShenandoahIsAliveClosure() :
53 _mark_context(ShenandoahHeap::heap()->marking_context()) {
54 }
55
56 bool ShenandoahIsAliveClosure::do_object_b(oop obj) {
57 if (CompressedOops::is_null(obj)) {
58 return false;
59 }
60 shenandoah_assert_not_forwarded(NULL, obj);
61 return _mark_context->is_marked(obj);
62 }
63
64 BoolObjectClosure* ShenandoahIsAliveSelector::is_alive_closure() {
65 return ShenandoahHeap::heap()->has_forwarded_objects() ?
66 reinterpret_cast<BoolObjectClosure*>(&_fwd_alive_cl) :
67 reinterpret_cast<BoolObjectClosure*>(&_alive_cl);
68 }
69
70 ShenandoahUpdateRefsClosure::ShenandoahUpdateRefsClosure() :
71 _heap(ShenandoahHeap::heap()) {
72 }
73
74 template <class T>
75 void ShenandoahUpdateRefsClosure::do_oop_work(T* p) {
76 T o = RawAccess<>::oop_load(p);
77 if (!CompressedOops::is_null(o)) {
78 oop obj = CompressedOops::decode_not_null(o);
79 _heap->update_with_forwarded_not_null(p, obj);
80 }
81 }
82
83 void ShenandoahUpdateRefsClosure::do_oop(oop* p) { do_oop_work(p); }
84 void ShenandoahUpdateRefsClosure::do_oop(narrowOop* p) { do_oop_work(p); }
85
86 ShenandoahTraversalUpdateRefsClosure::ShenandoahTraversalUpdateRefsClosure() :
87 _heap(ShenandoahHeap::heap()),
88 _traversal_set(ShenandoahHeap::heap()->traversal_gc()->traversal_set()) {
89 assert(_heap->is_traversal_mode(), "Why we here?");
90 }
91
92 template <class T>
93 void ShenandoahTraversalUpdateRefsClosure::do_oop_work(T* p) {
94 T o = RawAccess<>::oop_load(p);
95 if (!CompressedOops::is_null(o)) {
96 oop obj = CompressedOops::decode_not_null(o);
97 if (_heap->in_collection_set(obj) || _traversal_set->is_in((HeapWord*)obj)) {
98 obj = ShenandoahBarrierSet::resolve_forwarded_not_null(obj);
99 RawAccess<IS_NOT_NULL>::oop_store(p, obj);
100 } else {
101 shenandoah_assert_not_forwarded(p, obj);
102 }
103 }
104 }
105
106 void ShenandoahTraversalUpdateRefsClosure::do_oop(oop* p) { do_oop_work(p); }
107 void ShenandoahTraversalUpdateRefsClosure::do_oop(narrowOop* p) { do_oop_work(p); }
108
109 ShenandoahEvacuateUpdateRootsClosure::ShenandoahEvacuateUpdateRootsClosure() :
110 _heap(ShenandoahHeap::heap()), _thread(Thread::current()) {
111 }
112
113 template <class T>
114 void ShenandoahEvacuateUpdateRootsClosure::do_oop_work(T* p) {
115 assert(_heap->is_concurrent_root_in_progress(), "Only do this when evacuation is in progress");
116
117 T o = RawAccess<>::oop_load(p);
118 if (! CompressedOops::is_null(o)) {
119 oop obj = CompressedOops::decode_not_null(o);
120 if (_heap->in_collection_set(obj)) {
121 assert(_heap->is_evacuation_in_progress(), "Only do this when evacuation is in progress");
122 shenandoah_assert_marked(p, obj);
123 oop resolved = ShenandoahBarrierSet::resolve_forwarded_not_null(obj);
124 if (resolved == obj) {
125 resolved = _heap->evacuate_object(obj, _thread);
126 }
127 RawAccess<IS_NOT_NULL>::oop_store(p, resolved);
128 }
129 }
130 }
131 void ShenandoahEvacuateUpdateRootsClosure::do_oop(oop* p) {
132 do_oop_work(p);
133 }
134
135 void ShenandoahEvacuateUpdateRootsClosure::do_oop(narrowOop* p) {
136 do_oop_work(p);
137 }
138
139 ShenandoahEvacUpdateOopStorageRootsClosure::ShenandoahEvacUpdateOopStorageRootsClosure() :
140 _heap(ShenandoahHeap::heap()), _thread(Thread::current()) {
141 }
142
143 void ShenandoahEvacUpdateOopStorageRootsClosure::do_oop(oop* p) {
144 assert(_heap->is_concurrent_root_in_progress(), "Only do this when evacuation is in progress");
145
146 oop obj = RawAccess<>::oop_load(p);
147 if (! CompressedOops::is_null(obj)) {
148 if (_heap->in_collection_set(obj)) {
149 assert(_heap->is_evacuation_in_progress(), "Only do this when evacuation is in progress");
150 shenandoah_assert_marked(p, obj);
151 oop resolved = ShenandoahBarrierSet::resolve_forwarded_not_null(obj);
152 if (resolved == obj) {
153 resolved = _heap->evacuate_object(obj, _thread);
154 }
155
156 Atomic::cmpxchg(p, obj, resolved);
157 }
158 }
159 }
160
161 void ShenandoahEvacUpdateOopStorageRootsClosure::do_oop(narrowOop* p) {
162 ShouldNotReachHere();
163 }
164
165 ShenandoahCodeBlobAndDisarmClosure::ShenandoahCodeBlobAndDisarmClosure(OopClosure* cl) :
166 CodeBlobToOopClosure(cl, true /* fix_relocations */),
167 _bs(BarrierSet::barrier_set()->barrier_set_nmethod()) {
168 }
169
170 void ShenandoahCodeBlobAndDisarmClosure::do_code_blob(CodeBlob* cb) {
171 nmethod* const nm = cb->as_nmethod_or_null();
172 if (nm != NULL && nm->oops_do_try_claim()) {
173 assert(!ShenandoahNMethod::gc_data(nm)->is_unregistered(), "Should not be here");
174 CodeBlobToOopClosure::do_code_blob(cb);
175 _bs->disarm(nm);
176 }
177 }
178
179 #ifdef ASSERT
180 template <class T>
181 void ShenandoahAssertNotForwardedClosure::do_oop_work(T* p) {
182 T o = RawAccess<>::oop_load(p);
183 if (!CompressedOops::is_null(o)) {
184 oop obj = CompressedOops::decode_not_null(o);
185 shenandoah_assert_not_forwarded(p, obj);
186 }
187 }
188
189 void ShenandoahAssertNotForwardedClosure::do_oop(narrowOop* p) { do_oop_work(p); }
190 void ShenandoahAssertNotForwardedClosure::do_oop(oop* p) { do_oop_work(p); }
191 #endif
192
193 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP