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 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 ZAddressGoodMaskField; 37 private static AddressField ZAddressBadMaskField; 38 private static AddressField ZAddressWeakBadMaskField; 39 private static AddressField ZObjectAlignmentSmallShiftField; 40 private static AddressField ZObjectAlignmentSmallField; 41 42 static { 43 VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase())); 44 } 45 46 static private synchronized void initialize(TypeDataBase db) { 47 Type type = db.lookupType("ZGlobalsForVMStructs"); 48 49 ZGlobalPhaseField = type.getAddressField("_ZGlobalPhase"); 50 ZAddressGoodMaskField = type.getAddressField("_ZAddressGoodMask"); 51 ZAddressBadMaskField = type.getAddressField("_ZAddressBadMask"); 52 ZAddressWeakBadMaskField = type.getAddressField("_ZAddressWeakBadMask"); 53 ZObjectAlignmentSmallShiftField = type.getAddressField("_ZObjectAlignmentSmallShift"); 54 ZObjectAlignmentSmallField = type.getAddressField("_ZObjectAlignmentSmall"); 55 } 56 57 ZGlobalsForVMStructs(Address addr) { 58 super(addr); 59 } 60 61 int ZGlobalPhase() { 62 return ZGlobalPhaseField.getValue(addr).getJIntAt(0); 63 } 64 65 long ZAddressGoodMask() { 66 return ZAddressGoodMaskField.getValue(addr).getJLongAt(0); 67 } 68 69 long ZAddressBadMask() { 70 return ZAddressBadMaskField.getValue(addr).getJLongAt(0); 71 } 72 73 long ZAddressWeakBadMask() { 74 return ZAddressWeakBadMaskField.getValue(addr).getJLongAt(0); 75 } 76 77 int ZObjectAlignmentSmallShift() { 78 return ZObjectAlignmentSmallShiftField.getValue(addr).getJIntAt(0); 79 } 80 81 int ZObjectAlignmentSmall() { 82 return ZObjectAlignmentSmallField.getValue(addr).getJIntAt(0); 83 } 84 }