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 #include "gc/shenandoah/shenandoahMarkBitMap.inline.hpp" 30 #include "logging/log.hpp" 31 32 inline bool ShenandoahMarkingContext::mark_strong(oop obj, bool& was_upgraded) { 33 return !allocated_after_mark_start(obj) && _mark_bit_map.mark_strong(cast_from_oop<HeapWord*>(obj), was_upgraded); 34 } 35 36 inline bool ShenandoahMarkingContext::mark_weak(oop obj) { 37 return !allocated_after_mark_start(obj) && _mark_bit_map.mark_weak(cast_from_oop<HeapWord *>(obj)); 38 } 39 40 inline bool ShenandoahMarkingContext::is_marked(oop obj) const { 41 return allocated_after_mark_start(obj) || _mark_bit_map.is_marked(cast_from_oop<HeapWord *>(obj)); 42 } 43 44 inline bool ShenandoahMarkingContext::is_marked_strong(oop obj) const { 45 return allocated_after_mark_start(obj) || _mark_bit_map.is_marked_strong(cast_from_oop<HeapWord*>(obj)); 46 } 47 48 inline bool ShenandoahMarkingContext::is_marked_weak(oop obj) const { 49 return allocated_after_mark_start(obj) || _mark_bit_map.is_marked_weak(cast_from_oop<HeapWord *>(obj)); 50 } 51 52 inline bool ShenandoahMarkingContext::is_marked_or_old(oop obj) const { 53 return is_marked(obj) || ShenandoahHeap::heap()->is_old(obj); 54 } 55 56 inline bool ShenandoahMarkingContext::is_marked_strong_or_old(oop obj) const { 57 return is_marked_strong(obj) || ShenandoahHeap::heap()->is_old(obj); 58 } 59 60 inline HeapWord* ShenandoahMarkingContext::get_next_marked_addr(HeapWord* start, HeapWord* limit) const { 61 return _mark_bit_map.get_next_marked_addr(start, limit); 62 } 63 64 inline bool ShenandoahMarkingContext::allocated_after_mark_start(oop obj) const { 65 HeapWord* addr = cast_from_oop<HeapWord*>(obj); 66 return allocated_after_mark_start(addr); 67 } 68 69 inline bool ShenandoahMarkingContext::allocated_after_mark_start(HeapWord* addr) const { 70 uintx index = ((uintx) addr) >> ShenandoahHeapRegion::region_size_bytes_shift(); 71 HeapWord* top_at_mark_start = _top_at_mark_starts[index]; 72 bool alloc_after_mark_start = addr >= top_at_mark_start; 73 return alloc_after_mark_start; 74 } 75 76 inline void ShenandoahMarkingContext::capture_top_at_mark_start(ShenandoahHeapRegion *r) { 77 if (r->affiliation() != FREE) { 78 size_t idx = r->index(); 79 HeapWord* old_tams = _top_at_mark_starts_base[idx]; 80 HeapWord* new_tams = r->top(); 81 82 assert(new_tams >= old_tams, 83 "Region " SIZE_FORMAT", TAMS updates should be monotonic: " PTR_FORMAT " -> " PTR_FORMAT, 84 idx, p2i(old_tams), p2i(new_tams)); 85 assert((new_tams == r->bottom()) || (old_tams == r->bottom()) || (new_tams >= _top_bitmaps[idx]), 86 "Region " SIZE_FORMAT", top_bitmaps updates should be monotonic: " PTR_FORMAT " -> " PTR_FORMAT, 87 idx, p2i(_top_bitmaps[idx]), p2i(new_tams)); 88 assert(old_tams == r->bottom() || is_bitmap_clear_range(old_tams, new_tams), 89 "Region " SIZE_FORMAT ", bitmap should be clear while adjusting TAMS: " PTR_FORMAT " -> " PTR_FORMAT, 90 idx, p2i(old_tams), p2i(new_tams)); 91 92 log_debug(gc)("Capturing TAMS for %s Region " SIZE_FORMAT ", was: %llx, now: %llx", 93 affiliation_name(r->affiliation()), idx, (unsigned long long) old_tams, (unsigned long long) new_tams); 94 95 if ((old_tams == r->bottom()) && (new_tams > old_tams)) { 96 log_debug(gc)("Clearing mark bitmap for %s Region " SIZE_FORMAT " while capturing TAMS", 97 affiliation_name(r->affiliation()), idx); 98 99 clear_bitmap(r); 100 } 101 102 _top_at_mark_starts_base[idx] = new_tams; 103 if (new_tams > r->bottom()) { 104 // In this case, new_tams is greater than old _top_bitmaps[idx] 105 _top_bitmaps[idx] = new_tams; 106 } 107 } 108 // else, FREE regions do not need their TAMS updated 109 } 110 111 inline void ShenandoahMarkingContext::reset_top_at_mark_start(ShenandoahHeapRegion* r) { 112 _top_at_mark_starts_base[r->index()] = r->bottom(); 113 } 114 115 inline HeapWord* ShenandoahMarkingContext::top_at_mark_start(ShenandoahHeapRegion* r) const { 116 return _top_at_mark_starts_base[r->index()]; 117 } 118 119 inline void ShenandoahMarkingContext::reset_top_bitmap(ShenandoahHeapRegion* r) { 120 assert(is_bitmap_clear_range(r->bottom(), r->end()), 121 "Region " SIZE_FORMAT " should have no marks in bitmap", r->index()); 122 _top_bitmaps[r->index()] = r->bottom(); 123 } 124 125 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHMARKINGCONTEXT_INLINE_HPP