1 /* 2 * Copyright (c) 2000, 2024, 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.memory; 26 27 import java.io.PrintStream; 28 import sun.jvm.hotspot.utilities.Observable; 29 import sun.jvm.hotspot.utilities.Observer; 30 31 import sun.jvm.hotspot.debugger.Address; 32 import sun.jvm.hotspot.debugger.OopHandle; 33 import sun.jvm.hotspot.gc.epsilon.EpsilonHeap; 34 import sun.jvm.hotspot.gc.g1.G1CollectedHeap; 35 import sun.jvm.hotspot.gc.parallel.ParallelScavengeHeap; 36 import sun.jvm.hotspot.gc.serial.SerialHeap; 37 import sun.jvm.hotspot.gc.shared.CollectedHeap; 38 import sun.jvm.hotspot.gc.shenandoah.ShenandoahHeap; 39 import sun.jvm.hotspot.gc.shenandoah.ShenandoahGenerationalHeap; 40 import sun.jvm.hotspot.gc.x.XCollectedHeap; 41 import sun.jvm.hotspot.gc.z.ZCollectedHeap; 42 import sun.jvm.hotspot.oops.Oop; 43 import sun.jvm.hotspot.runtime.BasicType; 44 import sun.jvm.hotspot.runtime.VM; 45 import sun.jvm.hotspot.runtime.VMObject; 46 import sun.jvm.hotspot.runtime.VirtualConstructor; 47 import sun.jvm.hotspot.types.AddressField; 48 import sun.jvm.hotspot.types.CIntegerField; 49 import sun.jvm.hotspot.types.Type; 50 import sun.jvm.hotspot.types.TypeDataBase; 51 52 53 public class Universe { 54 private static AddressField collectedHeapField; 55 private static VirtualConstructor heapConstructor; 56 57 static { 58 VM.registerVMInitializedObserver(new Observer() { 59 public void update(Observable o, Object data) { 60 initialize(VM.getVM().getTypeDataBase()); 61 } 62 }); 63 } 64 65 private static boolean typeExists(TypeDataBase db, String type) { 66 try { 67 db.lookupType(type); 68 } catch (RuntimeException e) { 69 return false; 70 } 71 return true; 72 } 73 74 private static void addHeapTypeIfInDB(TypeDataBase db, Class<? extends VMObject> heapClass) { 75 String heapName = heapClass.getSimpleName(); 76 if (typeExists(db, heapName)) { 77 heapConstructor.addMapping(heapName, heapClass); 78 } 79 } 80 81 private static synchronized void initialize(TypeDataBase db) { 82 Type type = db.lookupType("Universe"); 83 84 collectedHeapField = type.getAddressField("_collectedHeap"); 85 86 heapConstructor = new VirtualConstructor(db); 87 addHeapTypeIfInDB(db, SerialHeap.class); 88 addHeapTypeIfInDB(db, ParallelScavengeHeap.class); 89 addHeapTypeIfInDB(db, G1CollectedHeap.class); 90 addHeapTypeIfInDB(db, EpsilonHeap.class); 91 addHeapTypeIfInDB(db, XCollectedHeap.class); 92 addHeapTypeIfInDB(db, ZCollectedHeap.class); 93 addHeapTypeIfInDB(db, ShenandoahHeap.class); 94 addHeapTypeIfInDB(db, ShenandoahGenerationalHeap.class); 95 96 UniverseExt.initialize(heapConstructor); 97 } 98 99 public Universe() { 100 } 101 public CollectedHeap heap() { 102 return (CollectedHeap) heapConstructor.instantiateWrapperFor(collectedHeapField.getValue()); 103 } 104 105 106 /** Returns "TRUE" iff "p" points into the allocated area of the heap. */ 107 public boolean isIn(Address p) { 108 return heap().isIn(p); 109 } 110 111 /** Returns "TRUE" iff "p" points into the reserved area of the heap. */ 112 public boolean isInReserved(Address p) { 113 return heap().isInReserved(p); 114 } 115 116 public void print() { printOn(System.out); } 117 public void printOn(PrintStream tty) { 118 heap().printOn(tty); 119 } 120 121 // Check whether an object field (static/non-static) of the given type must be 122 // aligned 0 mod 8. 123 public static boolean fieldTypeShouldBeAligned(BasicType type) { 124 return type == BasicType.T_DOUBLE || type == BasicType.T_LONG; 125 } 126 } --- EOF ---