1 /* 2 * Copyright (c) 2018, 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 package sun.jvm.hotspot.gc.z; 26 27 import sun.jvm.hotspot.debugger.Address; 28 29 class ZAddress { 30 static long as_long(Address value) { 31 if (value == null) { 32 return 0; 33 } 34 return value.asLongValue(); 35 }; 36 37 static boolean is_null(Address value) { 38 return value == null; 39 } 40 41 static boolean is_weak_bad(Address value) { 42 return (as_long(value) & ZGlobals.ZAddressWeakBadMask()) != 0; 43 } 44 45 static boolean is_weak_good(Address value) { 46 return !is_weak_bad(value) && !is_null(value); 47 } 48 49 static boolean is_weak_good_or_null(Address value) { 50 return !is_weak_bad(value); 51 } 52 53 static long offset(Address address) { 54 return as_long(address) & ZGlobals.ZAddressOffsetMask; 55 } 56 57 static Address address(long value) { 58 // TODO: Linux-specific - We don't use a heap base on Linux 59 return ZOop.to_address(value); 60 } 61 62 static Address good(Address value) { 63 return address(offset(value) | ZGlobals.ZAddressGoodMask()); 64 } 65 66 static Address good_or_null(Address value) { 67 return is_null(value) ? value : good(value); 68 } 69 }