1 /* 2 * Copyright (c) 2020, 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 26 #include "precompiled.hpp" 27 28 #include "gc/shared/markBitMap.inline.hpp" 29 #include "gc/shenandoah/shenandoahHeap.hpp" 30 #include "gc/shenandoah/shenandoahObjectMarker.hpp" 31 32 bool ShenandoahObjectMarker::init() { 33 assert(SafepointSynchronize::is_at_safepoint(), "safe iteration is only available during safepoints"); 34 // Bailout if failed to commit aux bitmap 35 if (!_heap->commit_aux_bitmap()) { 36 _bit_map = NULL; 37 return false; 38 } 39 _bit_map->clear(); 40 return true; 41 } 42 43 void ShenandoahObjectMarker::done() { 44 if (_bit_map != NULL) { 45 _heap->uncommit_aux_bit_map(); 46 } 47 delete this; 48 } 49 50 bool ShenandoahObjectMarker::mark(oop o) { 51 assert(_bit_map != NULL, "Should have been bailed out"); 52 if (_bit_map->is_marked(o)) return false; 53 _bit_map->mark(o); 54 return true; 55 } 56 57 bool ShenandoahObjectMarker::marked(oop o) { 58 assert(_bit_map != NULL, "Should have been bailed out"); 59 return _bit_map->is_marked(o); 60 }