1 /* 2 * Copyright (c) 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_G1CONCURRENTMARKBITMAP_INLINE_HPP 26 #define SHARE_VM_GC_G1_G1CONCURRENTMARKBITMAP_INLINE_HPP 27 28 #include "gc/g1/g1ConcurrentMarkBitMap.hpp" 29 #include "memory/memRegion.hpp" 30 #include "utilities/align.hpp" 31 #include "utilities/bitMap.inline.hpp" 32 33 inline bool G1CMBitMap::iterate(G1CMBitMapClosure* cl, MemRegion mr) { 34 assert(!mr.is_empty(), "Does not support empty memregion to iterate over"); 35 assert(_covered.contains(mr), "Given MemRegion from " PTR_FORMAT " to " PTR_FORMAT " not contained in heap area", p2i(mr.start()), p2i(mr.end())); 36 37 BitMap::idx_t const end_offset = addr_to_offset(mr.end()); 38 BitMap::idx_t offset = _bm.get_next_one_offset(addr_to_offset(mr.start()), end_offset); 39 40 while (offset < end_offset) { 41 HeapWord* const addr = offset_to_addr(offset); 42 if (!cl->do_addr(addr)) { 43 return false; 44 } 45 size_t const obj_size = (size_t)((oop)addr)->size(); 46 offset = _bm.get_next_one_offset(offset + (obj_size >> _shifter), end_offset); 47 } 48 return true; 49 } 50 51 inline HeapWord* G1CMBitMap::get_next_marked_addr(const HeapWord* addr, 52 const HeapWord* limit) const { 53 assert(limit != NULL, "limit must not be NULL"); 54 // Round addr up to a possible object boundary to be safe. 55 size_t const addr_offset = addr_to_offset(align_up(addr, HeapWordSize << _shifter)); 56 size_t const limit_offset = addr_to_offset(limit); 57 size_t const nextOffset = _bm.get_next_one_offset(addr_offset, limit_offset); 58 return offset_to_addr(nextOffset); 59 } 60 61 #ifdef ASSERT 62 inline void G1CMBitMap::check_mark(HeapWord* addr) { 63 assert(G1CollectedHeap::heap()->is_in_exact(addr), 64 "Trying to access bitmap " PTR_FORMAT " for address " PTR_FORMAT " not in the heap.", 65 p2i(this), p2i(addr)); 66 } 67 #endif 68 69 inline void G1CMBitMap::mark(HeapWord* addr) { 70 check_mark(addr); 71 _bm.set_bit(addr_to_offset(addr)); 72 } 73 74 inline void G1CMBitMap::clear(HeapWord* addr) { 75 check_mark(addr); 76 _bm.clear_bit(addr_to_offset(addr)); 77 } 78 79 inline bool G1CMBitMap::par_mark(HeapWord* addr) { 80 check_mark(addr); 81 return _bm.par_set_bit(addr_to_offset(addr)); 82 } 83 84 #endif // SHARE_VM_GC_G1_G1CONCURRENTMARKBITMAP_INLINE_HPP