1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. 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 25 #ifndef SHARE_VM_GC_G1_G1FULLGCOOPCLOSURES_INLINE_HPP 26 #define SHARE_VM_GC_G1_G1FULLGCOOPCLOSURES_INLINE_HPP 27 28 #include "gc/g1/g1Allocator.hpp" 29 #include "gc/g1/g1ConcurrentMarkBitMap.inline.hpp" 30 #include "gc/g1/g1FullGCMarker.inline.hpp" 31 #include "gc/g1/g1FullGCOopClosures.hpp" 32 #include "gc/g1/heapRegionRemSet.hpp" 33 #include "memory/iterator.inline.hpp" 34 #include "oops/access.inline.hpp" 35 #include "oops/compressedOops.inline.hpp" 36 37 template <typename T> 38 inline void G1MarkAndPushClosure::do_oop_nv(T* p) { 39 _marker->mark_and_push(p); 40 } 41 42 inline bool G1MarkAndPushClosure::do_metadata_nv() { 43 return true; 44 } 45 46 inline void G1MarkAndPushClosure::do_klass_nv(Klass* k) { 47 _marker->follow_klass(k); 48 } 49 50 inline void G1MarkAndPushClosure::do_cld_nv(ClassLoaderData* cld) { 51 _marker->follow_cld(cld); 52 } 53 54 template <class T> inline oop G1AdjustClosure::adjust_pointer(T* p) { 55 T heap_oop = RawAccess<>::oop_load(p); 56 if (CompressedOops::is_null(heap_oop)) { 57 // NULL reference, return NULL. 58 return NULL; 59 } 60 61 oop obj = CompressedOops::decode_not_null(heap_oop); 62 assert(Universe::heap()->is_in(obj), "should be in heap"); 63 if (G1ArchiveAllocator::is_archive_object(obj)) { 64 // Never forwarding archive objects, return current reference. 65 return obj; 66 } 67 68 oop forwardee = obj->forwardee(); 69 if (forwardee == NULL) { 70 // Not forwarded, return current reference. 71 assert(obj->mark() == markOopDesc::prototype_for_object(obj) || // Correct mark 72 obj->mark()->must_be_preserved(obj) || // Will be restored by PreservedMarksSet 73 (UseBiasedLocking && obj->has_bias_pattern()), // Will be restored by BiasedLocking 74 "Must have correct prototype or be preserved, obj: " PTR_FORMAT ", mark: " PTR_FORMAT ", prototype: " PTR_FORMAT, 75 p2i(obj), p2i(obj->mark()), p2i(markOopDesc::prototype_for_object(obj))); 76 return obj; 77 } 78 79 // Forwarded, update and return new reference. 80 assert(Universe::heap()->is_in_reserved(forwardee), "should be in object space"); 81 RawAccess<OOP_NOT_NULL>::oop_store(p, forwardee); 82 return forwardee; 83 } 84 85 template <class T> 86 inline void G1AdjustAndRebuildClosure::add_reference(T* from_field, oop reference, uint worker_id) { 87 if (HeapRegion::is_in_same_region(from_field, reference)) { 88 return; 89 } 90 _g1h->heap_region_containing(reference)->rem_set()->add_reference(from_field, worker_id); 91 } 92 93 inline size_t G1AdjustAndRebuildClosure::calculate_compaction_delta(oop current, oop forwardee) { 94 return pointer_delta((HeapWord*)forwardee, (HeapWord*)current); 95 } 96 97 template <class T> 98 inline T* G1AdjustAndRebuildClosure::add_compaction_delta(T* p) { 99 return (T*)((HeapWord*)p + _compaction_delta); 100 } 101 102 template<typename T> 103 void G1AdjustAndRebuildClosure::do_oop_nv(T* p) { 104 oop new_reference = G1AdjustClosure::adjust_pointer(p); 105 if (new_reference == NULL) { 106 return; 107 } 108 109 // Update p using the calculated compaction delta to 110 // get the new field address. 111 T* new_field = add_compaction_delta(p); 112 // Update the remembered set. 113 add_reference(new_field, new_reference, _worker_id); 114 } 115 116 inline int G1AdjustObjectClosure::adjust_object(oop obj) { 117 _closure->update_compaction_delta(obj); 118 return obj->oop_iterate_size(_closure); 119 } 120 121 inline bool G1IsAliveClosure::do_object_b(oop p) { 122 return _bitmap->is_marked(p) || G1ArchiveAllocator::is_closed_archive_object(p); 123 } 124 125 template<typename T> 126 inline void G1FullKeepAliveClosure::do_oop_work(T* p) { 127 _marker->mark_and_push(p); 128 } 129 130 #endif