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 assert_object_is_in_heap(p, obj); 121 122 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>::oop_store(p, resolved); 130 } 131 } 132 } 133 void ShenandoahEvacuateUpdateRootsClosure::do_oop(oop* p) { 134 do_oop_work(p); 135 } 136 137 void ShenandoahEvacuateUpdateRootsClosure::do_oop(narrowOop* p) { 138 do_oop_work(p); 139 } 140 141 ShenandoahEvacUpdateOopStorageRootsClosure::ShenandoahEvacUpdateOopStorageRootsClosure() : 142 _heap(ShenandoahHeap::heap()), _thread(Thread::current()) { 143 } 144 145 void ShenandoahEvacUpdateOopStorageRootsClosure::do_oop(oop* p) { 146 assert(_heap->is_concurrent_root_in_progress(), "Only do this when evacuation is in progress"); 147 148 oop obj = RawAccess<>::oop_load(p); 149 if (! CompressedOops::is_null(obj)) { 150 if (_heap->in_collection_set(obj)) { 151 assert(_heap->is_evacuation_in_progress(), "Only do this when evacuation is in progress"); 152 shenandoah_assert_marked(p, obj); 153 oop resolved = ShenandoahBarrierSet::resolve_forwarded_not_null(obj); 154 if (resolved == obj) { 155 resolved = _heap->evacuate_object(obj, _thread); 156 } 157 158 Atomic::cmpxchg(p, obj, resolved); 159 } 160 } 161 } 162 163 void ShenandoahEvacUpdateOopStorageRootsClosure::do_oop(narrowOop* p) { 164 ShouldNotReachHere(); 165 } 166 167 ShenandoahCodeBlobAndDisarmClosure::ShenandoahCodeBlobAndDisarmClosure(OopClosure* cl) : 168 CodeBlobToOopClosure(cl, true /* fix_relocations */), 169 _bs(BarrierSet::barrier_set()->barrier_set_nmethod()) { 170 } 171 172 void ShenandoahCodeBlobAndDisarmClosure::do_code_blob(CodeBlob* cb) { 173 nmethod* const nm = cb->as_nmethod_or_null(); 174 if (nm != NULL && nm->oops_do_try_claim()) { 175 assert(!ShenandoahNMethod::gc_data(nm)->is_unregistered(), "Should not be here"); 176 CodeBlobToOopClosure::do_code_blob(cb); 177 _bs->disarm(nm); 178 } 179 } 180 181 #ifdef ASSERT 182 template <class T> 183 void ShenandoahAssertNotForwardedClosure::do_oop_work(T* p) { 184 T o = RawAccess<>::oop_load(p); 185 if (!CompressedOops::is_null(o)) { 186 oop obj = CompressedOops::decode_not_null(o); 187 shenandoah_assert_not_forwarded(p, obj); 188 } 189 } 190 191 void ShenandoahAssertNotForwardedClosure::do_oop(narrowOop* p) { do_oop_work(p); } 192 void ShenandoahAssertNotForwardedClosure::do_oop(oop* p) { do_oop_work(p); } 193 #endif 194 195 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP