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.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 static { 36 VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase())); 37 } 38 39 static private synchronized void initialize(TypeDataBase db) { 40 Type type = db.lookupType("ZGlobalsForVMStructs"); 41 42 instanceField = type.getField("_instance_p"); 43 } 44 45 private static ZGlobalsForVMStructs instance() { 46 return new ZGlobalsForVMStructs(instanceField.getAddress()); 47 } 48 49 public static int ZGlobalPhase() { 50 return instance().ZGlobalPhase(); 51 } 52 53 public static long ZAddressGoodMask() { 54 return instance().ZAddressGoodMask(); 55 } 56 57 public static long ZAddressBadMask() { 58 return instance().ZAddressBadMask(); 59 } 60 61 public static long ZAddressWeakBadMask() { 62 return instance().ZAddressWeakBadMask(); 63 } 64 65 public static int ZObjectAlignmentSmallShift() { 66 return instance().ZObjectAlignmentSmallShift(); 67 } 68 69 public static int ZObjectAlignmentSmall() { 70 return instance().ZObjectAlignmentSmall(); 71 } 72 73 public static final int ZPhaseMark = 0; 74 public static final int ZPhaseMarkCompleted = 1; 75 public static final int ZPhaseRelocate = 2; 76 77 public static final byte ZPageTypeSmall = 0; 78 public static final byte ZPageTypeMedium = 1; 79 public static final byte ZPageTypeLarge = 2; 80 81 // TODO: Only LINUX for now 82 public static final int ZPlatformPageSizeSmallShift = 21; 83 public static final long ZPlatformAddressOffsetBits = 42; // 4TB 84 public static final long ZPlatformAddressMetadataShift = ZPlatformAddressOffsetBits; 85 86 87 // Page size shifts 88 public static final int ZPageSizeSmallShift = ZPlatformPageSizeSmallShift; 89 public static final int ZPageSizeMediumShift = ZPageSizeSmallShift + 4; 90 public static final int ZPageSizeMinShift = ZPageSizeSmallShift; 91 92 public static final int ZObjectAlignmentMediumShift = ZPageSizeMediumShift - 13; // 8192 objects per page 93 public static final int ZObjectAlignmentLargeShift = ZPageSizeSmallShift; 94 95 public static final int ZObjectAlignmentMedium = 1 << ZObjectAlignmentMediumShift; 96 public static final int ZObjectAlignmentLarge = 1 << ZObjectAlignmentLargeShift; 97 98 // Metadata part of address 99 public static final long ZAddressMetadataShift = ZPlatformAddressMetadataShift; 100 public static final long ZAddressMetadataBits = 4; 101 public static final long ZAddressMetadataMask = ((1L << ZAddressMetadataBits) - 1) << ZAddressMetadataShift; 102 103 public static final long ZAddressOffsetShift = 0; 104 public static final long ZAddressOffsetBits = ZPlatformAddressOffsetBits; 105 public static final long ZAddressOffsetMask = ((1L << ZAddressOffsetBits) - 1) << ZAddressOffsetShift; 106 107 public static final long ZMarked0 = 0x0000040000000000L; 108 public static final long ZMarked1 = 0x0000080000000000L; 109 public static final long ZRemapped = 0x0000100000000000L; 110 };