/* * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * 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. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "gc/g1/g1CollectedHeap.inline.hpp" #include "gc/g1/g1ConcurrentMarkBitMap.inline.hpp" #include "gc/g1/heapRegion.hpp" #include "memory/virtualspace.hpp" void G1CMBitMap::initialize(MemRegion heap, G1RegionToSpaceMapper* storage) { MarkBitMap::initialize(heap, storage->reserved()); storage->set_mapping_changed_listener(&_listener); } void G1CMBitMapMappingChangedListener::on_commit(uint start_region, size_t num_regions, bool zero_filled) { if (zero_filled) { return; } // We need to clear the bitmap on commit, removing any existing information. MemRegion mr(G1CollectedHeap::heap()->bottom_addr_for_region(start_region), num_regions * HeapRegion::GrainWords); _bm->clear_range(mr); } void G1CMBitMap::clear_region(HeapRegion* region) { if (!region->is_empty()) { MemRegion mr(region->bottom(), region->top()); clear_range(mr); } } #ifdef ASSERT void G1CMBitMap::check_mark(HeapWord* addr) { assert(G1CollectedHeap::heap()->is_in_exact(addr), "Trying to access bitmap " PTR_FORMAT " for address " PTR_FORMAT " not in the heap.", p2i(this), p2i(addr)); } #endif