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.runtime.VM; 28 import sun.jvm.hotspot.types.Field; 29 import sun.jvm.hotspot.types.Type; 30 import sun.jvm.hotspot.types.TypeDataBase; 31 32 public class ZGlobals { 33 private static Field instanceField; 34 35 // Global phase state 36 public static int ZPhaseRelocate; 37 38 public static byte ZPageTypeSmall; 39 public static byte ZPageTypeMedium; 40 public static byte ZPageTypeLarge; 41 42 // Page size shifts 43 public static long ZPageSizeSmallShift; 44 public static long ZPageSizeMediumShift; 45 public static long ZPageSizeMinShift; 46 47 // Object alignment shifts 48 public static int ZObjectAlignmentMediumShift; 49 public static int ZObjectAlignmentLargeShift; 50 51 // Pointer part of address 52 public static long ZAddressOffsetShift; 53 54 // Pointer part of address 55 public static long ZAddressOffsetBits; 56 public static long ZAddressOffsetMask; 57 public static long ZAddressOffsetMax; 58 59 // Address space start/end/size 60 public static long ZAddressSpaceStart; 61 62 static { 63 VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase())); 64 } 65 66 static private synchronized void initialize(TypeDataBase db) { 67 Type type = db.lookupType("ZGlobalsForVMStructs"); 68 69 instanceField = type.getField("_instance_p"); 70 71 ZPhaseRelocate = db.lookupIntConstant("ZPhaseRelocate").intValue(); 72 73 ZPageTypeSmall = db.lookupIntConstant("ZPageTypeSmall").byteValue(); 74 ZPageTypeMedium = db.lookupIntConstant("ZPageTypeMedium").byteValue(); 75 ZPageTypeLarge = db.lookupIntConstant("ZPageTypeLarge").byteValue(); 76 77 ZPageSizeSmallShift = db.lookupLongConstant("ZPageSizeSmallShift").longValue(); 78 ZPageSizeMediumShift = db.lookupLongConstant("ZPageSizeMediumShift").longValue(); 79 ZPageSizeMinShift = db.lookupLongConstant("ZPageSizeMinShift").longValue(); 80 81 ZObjectAlignmentMediumShift = db.lookupIntConstant("ZObjectAlignmentMediumShift").intValue(); 82 ZObjectAlignmentLargeShift = db.lookupIntConstant("ZObjectAlignmentLargeShift").intValue();; 83 84 ZAddressOffsetShift = db.lookupLongConstant("ZAddressOffsetShift").longValue(); 85 86 ZAddressOffsetBits = db.lookupLongConstant("ZAddressOffsetBits").longValue(); 87 ZAddressOffsetMask = db.lookupLongConstant("ZAddressOffsetMask").longValue(); 88 ZAddressOffsetMax = db.lookupLongConstant("ZAddressOffsetMax").longValue(); 89 90 ZAddressSpaceStart = db.lookupLongConstant("ZAddressSpaceStart").longValue(); 91 } 92 93 private static ZGlobalsForVMStructs instance() { 94 return new ZGlobalsForVMStructs(instanceField.getAddress()); 95 } 96 97 public static int ZGlobalPhase() { 98 return instance().ZGlobalPhase(); 99 } 100 101 public static int ZGlobalSeqNum() { 102 return instance().ZGlobalSeqNum(); 103 } 104 105 public static long ZAddressGoodMask() { 106 return instance().ZAddressGoodMask(); 107 } 108 109 public static long ZAddressBadMask() { 110 return instance().ZAddressBadMask(); 111 } 112 113 public static long ZAddressWeakBadMask() { 114 return instance().ZAddressWeakBadMask(); 115 } 116 117 public static int ZObjectAlignmentSmallShift() { 118 return instance().ZObjectAlignmentSmallShift(); 119 } 120 121 public static int ZObjectAlignmentSmall() { 122 return instance().ZObjectAlignmentSmall(); 123 } 124 }