1 /*
   2  * Copyright (c) 2017, 2018 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/oop.inline.hpp"
  35 
  36 template <typename T>
  37 inline void G1MarkAndPushClosure::do_oop_nv(T* p) {
  38   _marker->mark_and_push(p);
  39 }
  40 
  41 inline bool G1MarkAndPushClosure::do_metadata_nv() {
  42   return true;
  43 }
  44 
  45 inline void G1MarkAndPushClosure::do_klass_nv(Klass* k) {
  46   _marker->follow_klass(k);
  47 }
  48 
  49 inline void G1MarkAndPushClosure::do_cld_nv(ClassLoaderData* cld) {
  50   _marker->follow_cld(cld);
  51 }
  52 
  53 template <class T> inline oop G1AdjustClosure::adjust_pointer(T* p) {
  54   T heap_oop = oopDesc::load_heap_oop(p);
  55   if (oopDesc::is_null(heap_oop)) {
  56     // NULL reference, return NULL.
  57     return NULL;
  58   }
  59 
  60   oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
  61   assert(Universe::heap()->is_in(obj), "should be in heap");
  62   if (G1ArchiveAllocator::is_archive_object(obj)) {
  63     // Never forwarding archive objects, return current reference.
  64     return obj;
  65   }
  66 
  67   oop forwardee = obj->forwardee();
  68   if (forwardee == NULL) {
  69     // Not forwarded, return current reference.
  70     assert(obj->mark_raw() == markOopDesc::prototype_for_object(obj) || // Correct mark
  71            obj->mark_raw()->must_be_preserved(obj) || // Will be restored by PreservedMarksSet
  72            (UseBiasedLocking && obj->has_bias_pattern_raw()), // Will be restored by BiasedLocking
  73            "Must have correct prototype or be preserved, obj: " PTR_FORMAT ", mark: " PTR_FORMAT ", prototype: " PTR_FORMAT,
  74            p2i(obj), p2i(obj->mark_raw()), p2i(markOopDesc::prototype_for_object(obj)));
  75     return obj;
  76   }
  77 
  78   // Forwarded, update and return new reference.
  79   assert(Universe::heap()->is_in_reserved(forwardee), "should be in object space");
  80   oopDesc::encode_store_heap_oop_not_null(p, forwardee);
  81   return forwardee;
  82 }
  83 
  84 template <class T>
  85 inline void G1AdjustAndRebuildClosure::add_reference(T* from_field, oop reference, uint worker_id) {
  86   if (HeapRegion::is_in_same_region(from_field, reference)) {
  87     return;
  88   }
  89   _g1h->heap_region_containing(reference)->rem_set()->add_reference(from_field, worker_id);
  90 }
  91 
  92 inline size_t G1AdjustAndRebuildClosure::calculate_compaction_delta(oop current, oop forwardee) {
  93   return pointer_delta((HeapWord*)forwardee, (HeapWord*)current);
  94 }
  95 
  96 template <class T>
  97 inline T* G1AdjustAndRebuildClosure::add_compaction_delta(T* p) {
  98   return (T*)((HeapWord*)p + _compaction_delta);
  99 }
 100 
 101 template<typename T>
 102 void G1AdjustAndRebuildClosure::do_oop_nv(T* p) {
 103   oop new_reference = G1AdjustClosure::adjust_pointer(p);
 104   if (new_reference == NULL) {
 105     return;
 106   }
 107 
 108   // Update p using the calculated compaction delta to
 109   // get the new field address.
 110   T* new_field = add_compaction_delta(p);
 111   // Update the remembered set.
 112   add_reference(new_field, new_reference, _worker_id);
 113 }
 114 
 115 inline int G1AdjustObjectClosure::adjust_object(oop obj) {
 116   _closure->update_compaction_delta(obj);
 117   return obj->oop_iterate_size(_closure);
 118 }
 119 
 120 inline bool G1IsAliveClosure::do_object_b(oop p) {
 121   return _bitmap->is_marked(p) || G1ArchiveAllocator::is_closed_archive_object(p);
 122 }
 123 
 124 template<typename T>
 125 inline void G1FullKeepAliveClosure::do_oop_work(T* p) {
 126   _marker->mark_and_push(p);
 127 }
 128 
 129 #endif