1 /*
   2  * Copyright (c) 2018, Red Hat, Inc. All rights reserved.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 #ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHMARKINGCONTEXT_INLINE_HPP
  25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHMARKINGCONTEXT_INLINE_HPP
  26 
  27 #include "gc/shenandoah/shenandoahMarkingContext.hpp"
  28 
  29 inline MarkBitMap* ShenandoahMarkingContext::mark_bit_map() {
  30   return &_mark_bit_map;
  31 }
  32 
  33 inline bool ShenandoahMarkingContext::mark(oop obj) {
  34   shenandoah_assert_not_forwarded(NULL, obj);
  35   HeapWord* addr = (HeapWord*) obj;
  36   return (! allocated_after_mark_start(addr)) && _mark_bit_map.par_mark(addr);
  37 }
  38 
  39 inline bool ShenandoahMarkingContext::is_marked(oop obj) const {
  40   HeapWord* addr = (HeapWord*) obj;
  41   return allocated_after_mark_start(addr) || _mark_bit_map.is_marked(addr);
  42 }
  43 
  44 inline bool ShenandoahMarkingContext::allocated_after_mark_start(HeapWord* addr) const {
  45   uintx index = ((uintx) addr) >> ShenandoahHeapRegion::region_size_bytes_shift();
  46   HeapWord* top_at_mark_start = _top_at_mark_starts[index];
  47   bool alloc_after_mark_start = addr >= top_at_mark_start;
  48   return alloc_after_mark_start;
  49 }
  50 
  51 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHMARKINGCONTEXT_INLINE_HPP