1 /*
  2  * Copyright (c) 2017, 2021, 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_GC_G1_G1FULLGCOOPCLOSURES_INLINE_HPP
 26 #define SHARE_GC_G1_G1FULLGCOOPCLOSURES_INLINE_HPP
 27 
 28 #include "gc/g1/g1FullGCOopClosures.hpp"
 29 
 30 #include "gc/g1/g1Allocator.inline.hpp"
 31 #include "gc/g1/g1FullCollector.inline.hpp"
 32 #include "gc/g1/g1ConcurrentMarkBitMap.inline.hpp"
 33 #include "gc/g1/g1FullGCMarker.inline.hpp"
 34 #include "gc/g1/heapRegionRemSet.inline.hpp"
 35 #include "gc/shared/slidingForwarding.inline.hpp"
 36 #include "memory/iterator.inline.hpp"
 37 #include "memory/universe.hpp"
 38 #include "oops/access.inline.hpp"
 39 #include "oops/compressedOops.inline.hpp"
 40 #include "oops/oop.inline.hpp"
 41 
 42 template <typename T>
 43 inline void G1MarkAndPushClosure::do_oop_work(T* p) {
 44   _marker->mark_and_push(p);
 45 }
 46 
 47 inline void G1MarkAndPushClosure::do_oop(oop* p) {
 48   do_oop_work(p);
 49 }
 50 
 51 inline void G1MarkAndPushClosure::do_oop(narrowOop* p) {
 52   do_oop_work(p);
 53 }
 54 
 55 inline bool G1MarkAndPushClosure::do_metadata() {
 56   return true;
 57 }
 58 
 59 inline void G1MarkAndPushClosure::do_klass(Klass* k) {
 60   _marker->follow_klass(k);
 61 }
 62 
 63 inline void G1MarkAndPushClosure::do_cld(ClassLoaderData* cld) {
 64   _marker->follow_cld(cld);
 65 }
 66 
 67 template <class T> inline void G1AdjustClosure::adjust_pointer(T* p) {
 68   T heap_oop = RawAccess<>::oop_load(p);
 69   if (CompressedOops::is_null(heap_oop)) {
 70     return;
 71   }
 72 
 73   oop obj = CompressedOops::decode_not_null(heap_oop);
 74   assert(Universe::heap()->is_in(obj), "should be in heap");
 75   if (!_collector->is_compacting(obj)) {
 76     // We never forward objects in non-compacting regions so there is no need to
 77     // process them further.
 78     return;
 79   }
 80 
 81   if (!obj->is_forwarded()) {
 82     // Not forwarded, return current reference.
 83     assert(obj->mark() LP64_ONLY(.set_narrow_klass(0)) == markWord::prototype() || // Correct mark
 84            obj->mark_must_be_preserved(), // Will be restored by PreservedMarksSet
 85            "Must have correct prototype or be preserved, obj: " PTR_FORMAT ", mark: " PTR_FORMAT ", prototype: " PTR_FORMAT,
 86            p2i(obj), obj->mark().value(), markWord::prototype().value());
 87     return;
 88   }
 89 
 90   // Forwarded, just update.
 91   oop forwardee = _forwarding->forwardee(obj);
 92   assert(G1CollectedHeap::heap()->is_in_reserved(forwardee), "should be in object space");
 93   RawAccess<IS_NOT_NULL>::oop_store(p, forwardee);
 94 }
 95 
 96 inline void G1AdjustClosure::do_oop(oop* p)       { do_oop_work(p); }
 97 inline void G1AdjustClosure::do_oop(narrowOop* p) { do_oop_work(p); }
 98 
 99 inline bool G1IsAliveClosure::do_object_b(oop p) {
100   return _bitmap->is_marked(p) || _collector->is_skip_marking(p);
101 }
102 
103 template<typename T>
104 inline void G1FullKeepAliveClosure::do_oop_work(T* p) {
105   _marker->mark_and_push(p);
106 }
107 
108 #endif // SHARE_GC_G1_G1FULLGCOOPCLOSURES_INLINE_HPP