1 /*
   2  * Copyright (c) 2001, 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_G1REMSET_INLINE_HPP
  26 #define SHARE_VM_GC_G1_G1REMSET_INLINE_HPP
  27 
  28 #include "gc/g1/g1RemSet.hpp"
  29 #include "gc/g1/heapRegion.hpp"
  30 #include "gc/g1/heapRegionRemSet.hpp"
  31 #include "oops/oop.inline.hpp"
  32 
  33 template <class T>
  34 inline void G1RemSet::par_write_ref(HeapRegion* from, T* p, uint tid) {
  35   oop obj = oopDesc::load_decode_heap_oop(p);
  36   if (obj == NULL) {
  37     return;
  38   }
  39 
  40 #ifdef ASSERT
  41   // can't do because of races
  42   // assert(obj == NULL || obj->is_oop(), "expected an oop");
  43   assert(check_obj_alignment(obj), "not oop aligned");
  44   assert(_g1->is_in_reserved(obj), "must be in heap");
  45 #endif // ASSERT
  46 
  47   assert(from->is_in_reserved(p) || from->is_starts_humongous(), "p is not in from");
  48 
  49   HeapRegion* to = _g1->heap_region_containing(obj);
  50   if (from != to) {
  51     assert(to->rem_set() != NULL, "Need per-region 'into' remsets.");
  52     to->rem_set()->add_reference(p, tid);
  53   }
  54 }
  55 
  56 template <class T>
  57 inline void RebuildRSOopClosure::do_oop_work(T* p) {
  58   assert(_from != NULL, "from region must be non-NULL");
  59   _rs->par_write_ref(_from, p, _worker_i);
  60 }
  61 
  62 #endif // SHARE_VM_GC_G1_G1REMSET_INLINE_HPP