1 /*
   2  * Copyright (c) 2018, 2019, Red Hat, Inc. 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_SHENANDOAH_SHENANDOAHMARKINGCONTEXT_INLINE_HPP
  26 #define SHARE_GC_SHENANDOAH_SHENANDOAHMARKINGCONTEXT_INLINE_HPP
  27 
  28 #include "gc/shenandoah/shenandoahMarkingContext.hpp"
  29 
  30 inline MarkBitMap* ShenandoahMarkingContext::mark_bit_map() {
  31   return &_mark_bit_map;
  32 }
  33 
  34 inline bool ShenandoahMarkingContext::mark(oop obj) {
  35   shenandoah_assert_not_forwarded(NULL, obj);
  36   HeapWord* addr = cast_from_oop<HeapWord*>(obj);
  37   return (! allocated_after_mark_start(addr)) && _mark_bit_map.par_mark(addr);
  38 }
  39 
  40 inline bool ShenandoahMarkingContext::is_marked(oop obj) const {
  41   HeapWord* addr = cast_from_oop<HeapWord*>(obj);
  42   return allocated_after_mark_start(addr) || _mark_bit_map.is_marked(addr);
  43 }
  44 
  45 inline bool ShenandoahMarkingContext::allocated_after_mark_start(HeapWord* addr) const {

  46   uintx index = ((uintx) addr) >> ShenandoahHeapRegion::region_size_bytes_shift();
  47   HeapWord* top_at_mark_start = _top_at_mark_starts[index];
  48   bool alloc_after_mark_start = addr >= top_at_mark_start;
  49   return alloc_after_mark_start;
  50 }
  51 
  52 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHMARKINGCONTEXT_INLINE_HPP
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