src/hotspot/share/gc/shenandoah/shenandoahMarkingContext.inline.hpp

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#ifndef SHARE_GC_SHENANDOAH_SHENANDOAHMARKINGCONTEXT_INLINE_HPP
#define SHARE_GC_SHENANDOAH_SHENANDOAHMARKINGCONTEXT_INLINE_HPP

#include "gc/shenandoah/shenandoahMarkingContext.hpp"

#include "gc/shenandoah/shenandoahMarkBitMap.inline.hpp"

inline bool ShenandoahMarkingContext::mark_strong(oop obj, bool& was_upgraded) {
  return !allocated_after_mark_start(obj) && _mark_bit_map.mark_strong(cast_from_oop<HeapWord*>(obj), was_upgraded);
}

inline bool ShenandoahMarkingContext::mark_weak(oop obj) {
  return !allocated_after_mark_start(obj) && _mark_bit_map.mark_weak(cast_from_oop<HeapWord *>(obj));
}

inline bool ShenandoahMarkingContext::is_marked(oop obj) const {
  return allocated_after_mark_start(obj) || _mark_bit_map.is_marked(cast_from_oop<HeapWord *>(obj));
}

inline bool ShenandoahMarkingContext::is_marked_strong(oop obj) const {
  return allocated_after_mark_start(obj) || _mark_bit_map.is_marked_strong(cast_from_oop<HeapWord*>(obj));
}

inline bool ShenandoahMarkingContext::is_marked_weak(oop obj) const {
  return allocated_after_mark_start(obj) || _mark_bit_map.is_marked_weak(cast_from_oop<HeapWord *>(obj));
}

inline HeapWord* ShenandoahMarkingContext::get_next_marked_addr(HeapWord* start, HeapWord* limit) const {
  return _mark_bit_map.get_next_marked_addr(start, limit);
}

inline bool ShenandoahMarkingContext::allocated_after_mark_start(oop obj) const {
  HeapWord* addr = cast_from_oop<HeapWord*>(obj);
  return allocated_after_mark_start(addr);
}

inline bool ShenandoahMarkingContext::allocated_after_mark_start(HeapWord* addr) const {
  uintx index = ((uintx) addr) >> ShenandoahHeapRegion::region_size_bytes_shift();
  HeapWord* top_at_mark_start = _top_at_mark_starts[index];
  bool alloc_after_mark_start = addr >= top_at_mark_start;
  return alloc_after_mark_start;
}

inline void ShenandoahMarkingContext::capture_top_at_mark_start(ShenandoahHeapRegion *r) {
  size_t idx = r->index();
  HeapWord* old_tams = _top_at_mark_starts_base[idx];
  HeapWord* new_tams = r->top();

  assert(new_tams >= old_tams,
         "Region " SIZE_FORMAT", TAMS updates should be monotonic: " PTR_FORMAT " -> " PTR_FORMAT,
         idx, p2i(old_tams), p2i(new_tams));
  assert(is_bitmap_clear_range(old_tams, new_tams),
         "Region " SIZE_FORMAT ", bitmap should be clear while adjusting TAMS: " PTR_FORMAT " -> " PTR_FORMAT,
         idx, p2i(old_tams), p2i(new_tams));

  _top_at_mark_starts_base[idx] = new_tams;
  _top_bitmaps[idx] = new_tams;
}

inline void ShenandoahMarkingContext::reset_top_at_mark_start(ShenandoahHeapRegion* r) {
  _top_at_mark_starts_base[r->index()] = r->bottom();
}

inline HeapWord* ShenandoahMarkingContext::top_at_mark_start(ShenandoahHeapRegion* r) const {
  return _top_at_mark_starts_base[r->index()];
}

inline void ShenandoahMarkingContext::reset_top_bitmap(ShenandoahHeapRegion* r) {
  assert(is_bitmap_clear_range(r->bottom(), r->end()),
         "Region " SIZE_FORMAT " should have no marks in bitmap", r->index());
  _top_bitmaps[r->index()] = r->bottom();
}

#endif // SHARE_GC_SHENANDOAH_SHENANDOAHMARKINGCONTEXT_INLINE_HPP