1 /* 2 * Copyright (c) 2015, 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 #include "precompiled.hpp" 25 #include "gc/z/zAddress.inline.hpp" 26 #include "gc/z/zGlobals.hpp" 27 #include "runtime/thread.hpp" 28 29 void ZAddressMasks::set_good_mask(uintptr_t mask) { 30 uintptr_t old_bad_mask = ZAddressBadMask; 31 ZAddressGoodMask = mask; 32 ZAddressBadMask = ZAddressGoodMask ^ ZAddressMetadataMask; 33 ZAddressWeakBadMask = (ZAddressGoodMask | ZAddressMetadataRemapped | ZAddressMetadataFinalizable) ^ ZAddressMetadataMask; 34 35 platform_set_bad_mask(old_bad_mask, ZAddressBadMask); 36 } 37 38 void ZAddressMasks::initialize() { 39 ZAddressMetadataMarked = ZAddressMetadataMarked0; 40 set_good_mask(ZAddressMetadataRemapped); 41 } 42 43 void ZAddressMasks::flip_to_marked() { 44 ZAddressMetadataMarked ^= (ZAddressMetadataMarked0 | ZAddressMetadataMarked1); 45 set_good_mask(ZAddressMetadataMarked); 46 } 47 48 void ZAddressMasks::flip_to_remapped() { 49 set_good_mask(ZAddressMetadataRemapped); 50 }