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 *
23 */
24 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_INLINE_HPP
25 #define SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_INLINE_HPP
26
27 #include "gc/shenandoah/shenandoahClosures.hpp"
28
29 #include "gc/shared/barrierSetNMethod.hpp"
30 #include "gc/shenandoah/shenandoahAsserts.hpp"
31 #include "gc/shenandoah/shenandoahBarrierSet.hpp"
32 #include "gc/shenandoah/shenandoahEvacOOMHandler.inline.hpp"
33 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
34 #include "gc/shenandoah/shenandoahNMethod.inline.hpp"
35 #include "oops/compressedOops.inline.hpp"
36 #include "runtime/atomic.hpp"
37 #include "runtime/thread.hpp"
38
39 ShenandoahForwardedIsAliveClosure::ShenandoahForwardedIsAliveClosure() :
40 _mark_context(ShenandoahHeap::heap()->marking_context()) {
41 }
42
43 bool ShenandoahForwardedIsAliveClosure::do_object_b(oop obj) {
44 if (CompressedOops::is_null(obj)) {
45 return false;
46 }
47 obj = ShenandoahBarrierSet::resolve_forwarded_not_null(obj);
48 shenandoah_assert_not_forwarded_if(NULL, obj, ShenandoahHeap::heap()->is_concurrent_mark_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 ShenandoahKeepAliveClosure::ShenandoahKeepAliveClosure() :
71 _bs(static_cast<ShenandoahBarrierSet*>(BarrierSet::barrier_set())) {
72 }
73
74 void ShenandoahKeepAliveClosure::do_oop(oop* p) {
75 do_oop_work(p);
76 }
77
78 void ShenandoahKeepAliveClosure::do_oop(narrowOop* p) {
79 do_oop_work(p);
80 }
81
82 template <typename T>
83 void ShenandoahKeepAliveClosure::do_oop_work(T* p) {
84 assert(ShenandoahHeap::heap()->is_concurrent_mark_in_progress(), "Only for concurrent marking phase");
85 assert(!ShenandoahHeap::heap()->has_forwarded_objects(), "Not expected");
86
87 T o = RawAccess<>::oop_load(p);
88 if (!CompressedOops::is_null(o)) {
89 oop obj = CompressedOops::decode_not_null(o);
90 _bs->enqueue(obj);
91 }
92 }
93
94 ShenandoahUpdateRefsClosure::ShenandoahUpdateRefsClosure() :
95 _heap(ShenandoahHeap::heap()) {
96 }
97
98 template <class T>
99 void ShenandoahUpdateRefsClosure::do_oop_work(T* p) {
100 _heap->update_with_forwarded(p);
101 }
102
103 void ShenandoahUpdateRefsClosure::do_oop(oop* p) { do_oop_work(p); }
104 void ShenandoahUpdateRefsClosure::do_oop(narrowOop* p) { do_oop_work(p); }
105
106 template <DecoratorSet MO>
107 ShenandoahEvacuateUpdateMetadataClosure<MO>::ShenandoahEvacuateUpdateMetadataClosure() :
108 _heap(ShenandoahHeap::heap()), _thread(Thread::current()) {
109 }
110
111 template <DecoratorSet MO>
112 template <class T>
113 void ShenandoahEvacuateUpdateMetadataClosure<MO>::do_oop_work(T* p) {
114 assert(_heap->is_concurrent_weak_root_in_progress() ||
115 _heap->is_concurrent_strong_root_in_progress(),
116 "Only do this in root processing phase");
117 assert(_thread == Thread::current(), "Wrong thread");
118
119 T o = RawAccess<>::oop_load(p);
120 if (! CompressedOops::is_null(o)) {
121 oop obj = CompressedOops::decode_not_null(o);
122 if (_heap->in_collection_set(obj)) {
123 assert(_heap->is_evacuation_in_progress(), "Only do this when evacuation is in progress");
124 shenandoah_assert_marked(p, obj);
125 oop resolved = ShenandoahBarrierSet::resolve_forwarded_not_null(obj);
126 if (resolved == obj) {
127 resolved = _heap->evacuate_object(obj, _thread);
128 }
129 RawAccess<IS_NOT_NULL | MO>::oop_store(p, resolved);
130 }
131 }
132 }
133 template <DecoratorSet MO>
134 void ShenandoahEvacuateUpdateMetadataClosure<MO>::do_oop(oop* p) {
135 do_oop_work(p);
136 }
137
138 template <DecoratorSet MO>
139 void ShenandoahEvacuateUpdateMetadataClosure<MO>::do_oop(narrowOop* p) {
140 do_oop_work(p);
141 }
142
143 ShenandoahEvacuateUpdateRootsClosure::ShenandoahEvacuateUpdateRootsClosure() :
144 _heap(ShenandoahHeap::heap()) {
145 }
146
147 template <typename T>
148 void ShenandoahEvacuateUpdateRootsClosure::do_oop_work(T* p, Thread* t) {
149 assert(_heap->is_concurrent_weak_root_in_progress() ||
150 _heap->is_concurrent_strong_root_in_progress(),
151 "Only do this in root processing phase");
152 assert(t == Thread::current(), "Wrong thread");
153
154 T o = RawAccess<>::oop_load(p);
155 if (!CompressedOops::is_null(o)) {
156 oop obj = CompressedOops::decode_not_null(o);
157 if (_heap->in_collection_set(obj)) {
158 assert(_heap->is_evacuation_in_progress(), "Only do this when evacuation is in progress");
159 shenandoah_assert_marked(p, obj);
160 oop resolved = ShenandoahBarrierSet::resolve_forwarded_not_null(obj);
161 if (resolved == obj) {
162 resolved = _heap->evacuate_object(obj, t);
163 }
164 ShenandoahHeap::atomic_update_oop(resolved, p, o);
165 }
166 }
167 }
168
169 void ShenandoahEvacuateUpdateRootsClosure::do_oop(oop* p) {
170 ShenandoahEvacOOMScope scope;
171 do_oop_work(p, Thread::current());
172 }
173
174 void ShenandoahEvacuateUpdateRootsClosure::do_oop(narrowOop* p) {
175 ShenandoahEvacOOMScope scope;
176 do_oop_work(p, Thread::current());
177 }
178
179 ShenandoahContextEvacuateUpdateRootsClosure::ShenandoahContextEvacuateUpdateRootsClosure() :
180 ShenandoahEvacuateUpdateRootsClosure(),
181 _thread(Thread::current()) {
182 }
183
184 void ShenandoahContextEvacuateUpdateRootsClosure::do_oop(oop* p) {
185 ShenandoahEvacOOMScope scope;
186 do_oop_work(p, _thread);
187 }
188
189 void ShenandoahContextEvacuateUpdateRootsClosure::do_oop(narrowOop* p) {
190 ShenandoahEvacOOMScope scope;
191 do_oop_work(p, _thread);
192 }
193
194 template <bool CONCURRENT, typename IsAlive, typename KeepAlive>
195 ShenandoahCleanUpdateWeakOopsClosure<CONCURRENT, IsAlive, KeepAlive>::ShenandoahCleanUpdateWeakOopsClosure(IsAlive* is_alive, KeepAlive* keep_alive) :
196 _is_alive(is_alive), _keep_alive(keep_alive) {
197 if (!CONCURRENT) {
198 assert(SafepointSynchronize::is_at_safepoint(), "Must be at a safepoint");
199 }
200 }
201
202 template <bool CONCURRENT, typename IsAlive, typename KeepAlive>
203 void ShenandoahCleanUpdateWeakOopsClosure<CONCURRENT, IsAlive, KeepAlive>::do_oop(oop* p) {
204 oop obj = RawAccess<>::oop_load(p);
205 if (!CompressedOops::is_null(obj)) {
206 if (_is_alive->do_object_b(obj)) {
207 _keep_alive->do_oop(p);
208 } else {
209 if (CONCURRENT) {
210 ShenandoahHeap::atomic_clear_oop(p, obj);
211 } else {
212 RawAccess<IS_NOT_NULL>::oop_store(p, oop());
213 }
214 }
215 }
216 }
217
218 template <bool CONCURRENT, typename IsAlive, typename KeepAlive>
219 void ShenandoahCleanUpdateWeakOopsClosure<CONCURRENT, IsAlive, KeepAlive>::do_oop(narrowOop* p) {
220 ShouldNotReachHere();
221 }
222
223 ShenandoahCodeBlobAndDisarmClosure::ShenandoahCodeBlobAndDisarmClosure(OopClosure* cl) :
224 CodeBlobToOopClosure(cl, true /* fix_relocations */),
225 _bs(BarrierSet::barrier_set()->barrier_set_nmethod()) {
226 }
227
228 void ShenandoahCodeBlobAndDisarmClosure::do_code_blob(CodeBlob* cb) {
229 nmethod* const nm = cb->as_nmethod_or_null();
230 if (nm != NULL && nm->oops_do_try_claim()) {
231 assert(!ShenandoahNMethod::gc_data(nm)->is_unregistered(), "Should not be here");
232 CodeBlobToOopClosure::do_code_blob(cb);
233 _bs->disarm(nm);
234 }
235 }
236
237 #ifdef ASSERT
238 template <class T>
239 void ShenandoahAssertNotForwardedClosure::do_oop_work(T* p) {
240 T o = RawAccess<>::oop_load(p);
241 if (!CompressedOops::is_null(o)) {
242 oop obj = CompressedOops::decode_not_null(o);
243 shenandoah_assert_not_forwarded(p, obj);
244 }
245 }
246
247 void ShenandoahAssertNotForwardedClosure::do_oop(narrowOop* p) { do_oop_work(p); }
248 void ShenandoahAssertNotForwardedClosure::do_oop(oop* p) { do_oop_work(p); }
249 #endif
250
251 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP