1 /* 2 * Copyright (c) 2018, 2019, 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 import sun.jvm.hotspot.runtime.VM; 29 import sun.jvm.hotspot.runtime.VMObject; 30 import sun.jvm.hotspot.types.AddressField; 31 import sun.jvm.hotspot.types.Type; 32 import sun.jvm.hotspot.types.TypeDataBase; 33 34 class ZGlobalsForVMStructs extends VMObject { 35 private static AddressField ZGlobalPhaseField; 36 private static AddressField ZGlobalSeqNumField; 37 private static AddressField ZAddressGoodMaskField; 38 private static AddressField ZAddressBadMaskField; 39 private static AddressField ZAddressWeakBadMaskField; 40 private static AddressField ZObjectAlignmentSmallShiftField; 41 private static AddressField ZObjectAlignmentSmallField; 42 43 static { 44 VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase())); 45 } 46 47 static private synchronized void initialize(TypeDataBase db) { 48 Type type = db.lookupType("ZGlobalsForVMStructs"); 49 50 ZGlobalPhaseField = type.getAddressField("_ZGlobalPhase"); 51 ZGlobalSeqNumField = type.getAddressField("_ZGlobalSeqNum"); 52 ZAddressGoodMaskField = type.getAddressField("_ZAddressGoodMask"); 53 ZAddressBadMaskField = type.getAddressField("_ZAddressBadMask"); 54 ZAddressWeakBadMaskField = type.getAddressField("_ZAddressWeakBadMask"); 55 ZObjectAlignmentSmallShiftField = type.getAddressField("_ZObjectAlignmentSmallShift"); 56 ZObjectAlignmentSmallField = type.getAddressField("_ZObjectAlignmentSmall"); 57 } 58 59 ZGlobalsForVMStructs(Address addr) { 60 super(addr); 61 } 62 63 int ZGlobalPhase() { 64 return ZGlobalPhaseField.getValue(addr).getJIntAt(0); 65 } 66 67 int ZGlobalSeqNum() { 68 return ZGlobalSeqNumField.getValue(addr).getJIntAt(0); 69 } 70 71 long ZAddressGoodMask() { 72 return ZAddressGoodMaskField.getValue(addr).getJLongAt(0); 73 } 74 75 long ZAddressBadMask() { 76 return ZAddressBadMaskField.getValue(addr).getJLongAt(0); 77 } 78 79 long ZAddressWeakBadMask() { 80 return ZAddressWeakBadMaskField.getValue(addr).getJLongAt(0); 81 } 82 83 int ZObjectAlignmentSmallShift() { 84 return ZObjectAlignmentSmallShiftField.getValue(addr).getJIntAt(0); 85 } 86 87 int ZObjectAlignmentSmall() { 88 return ZObjectAlignmentSmallField.getValue(addr).getJIntAt(0); 89 } 90 }