| /* |
| * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.memory; |
| |
| import java.io.PrintStream; |
| import java.util.Observable; |
| import java.util.Observer; |
| |
| import sun.jvm.hotspot.debugger.Address; |
| import sun.jvm.hotspot.debugger.OopHandle; |
| import sun.jvm.hotspot.gc.cms.CMSHeap; |
| import sun.jvm.hotspot.gc.epsilon.EpsilonHeap; |
| import sun.jvm.hotspot.gc.g1.G1CollectedHeap; |
| import sun.jvm.hotspot.gc.parallel.ParallelScavengeHeap; |
| import sun.jvm.hotspot.gc.serial.SerialHeap; |
| import sun.jvm.hotspot.gc.shared.CollectedHeap; |
| import sun.jvm.hotspot.gc.shenandoah.ShenandoahHeap; |
| import sun.jvm.hotspot.gc.z.ZCollectedHeap; |
| import sun.jvm.hotspot.oops.Oop; |
| import sun.jvm.hotspot.runtime.BasicType; |
| import sun.jvm.hotspot.runtime.VM; |
| import sun.jvm.hotspot.runtime.VirtualConstructor; |
| import sun.jvm.hotspot.types.AddressField; |
| import sun.jvm.hotspot.types.CIntegerField; |
| import sun.jvm.hotspot.types.Type; |
| import sun.jvm.hotspot.types.TypeDataBase; |
| |
| |
| public class Universe { |
| private static AddressField collectedHeapField; |
| private static VirtualConstructor heapConstructor; |
| private static sun.jvm.hotspot.types.OopField mainThreadGroupField; |
| private static sun.jvm.hotspot.types.OopField systemThreadGroupField; |
| |
| // single dimensional primitive array klasses |
| private static sun.jvm.hotspot.types.AddressField boolArrayKlassField; |
| private static sun.jvm.hotspot.types.AddressField byteArrayKlassField; |
| private static sun.jvm.hotspot.types.AddressField charArrayKlassField; |
| private static sun.jvm.hotspot.types.AddressField intArrayKlassField; |
| private static sun.jvm.hotspot.types.AddressField shortArrayKlassField; |
| private static sun.jvm.hotspot.types.AddressField longArrayKlassField; |
| private static sun.jvm.hotspot.types.AddressField singleArrayKlassField; |
| private static sun.jvm.hotspot.types.AddressField doubleArrayKlassField; |
| |
| private static AddressField narrowOopBaseField; |
| private static CIntegerField narrowOopShiftField; |
| private static AddressField narrowKlassBaseField; |
| private static CIntegerField narrowKlassShiftField; |
| |
| public enum NARROW_OOP_MODE { |
| UnscaledNarrowOop, |
| ZeroBasedNarrowOop, |
| HeapBasedNarrowOop |
| } |
| |
| static { |
| VM.registerVMInitializedObserver(new Observer() { |
| public void update(Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| private static boolean typeExists(TypeDataBase db, String type) { |
| try { |
| db.lookupType(type); |
| } catch (RuntimeException e) { |
| return false; |
| } |
| return true; |
| } |
| |
| private static void addHeapTypeIfInDB(TypeDataBase db, Class heapClass) { |
| String heapName = heapClass.getSimpleName(); |
| if (typeExists(db, heapName)) { |
| heapConstructor.addMapping(heapName, heapClass); |
| } |
| } |
| |
| private static synchronized void initialize(TypeDataBase db) { |
| Type type = db.lookupType("Universe"); |
| |
| collectedHeapField = type.getAddressField("_collectedHeap"); |
| |
| heapConstructor = new VirtualConstructor(db); |
| addHeapTypeIfInDB(db, CMSHeap.class); |
| addHeapTypeIfInDB(db, SerialHeap.class); |
| addHeapTypeIfInDB(db, ParallelScavengeHeap.class); |
| addHeapTypeIfInDB(db, G1CollectedHeap.class); |
| addHeapTypeIfInDB(db, EpsilonHeap.class); |
| addHeapTypeIfInDB(db, ZCollectedHeap.class); |
| addHeapTypeIfInDB(db, ShenandoahHeap.class); |
| |
| mainThreadGroupField = type.getOopField("_main_thread_group"); |
| systemThreadGroupField = type.getOopField("_system_thread_group"); |
| |
| boolArrayKlassField = type.getAddressField("_boolArrayKlassObj"); |
| byteArrayKlassField = type.getAddressField("_byteArrayKlassObj"); |
| charArrayKlassField = type.getAddressField("_charArrayKlassObj"); |
| intArrayKlassField = type.getAddressField("_intArrayKlassObj"); |
| shortArrayKlassField = type.getAddressField("_shortArrayKlassObj"); |
| longArrayKlassField = type.getAddressField("_longArrayKlassObj"); |
| singleArrayKlassField = type.getAddressField("_singleArrayKlassObj"); |
| doubleArrayKlassField = type.getAddressField("_doubleArrayKlassObj"); |
| |
| narrowOopBaseField = type.getAddressField("_narrow_oop._base"); |
| narrowOopShiftField = type.getCIntegerField("_narrow_oop._shift"); |
| narrowKlassBaseField = type.getAddressField("_narrow_klass._base"); |
| narrowKlassShiftField = type.getCIntegerField("_narrow_klass._shift"); |
| |
| UniverseExt.initialize(heapConstructor); |
| } |
| |
| public Universe() { |
| } |
| public static String narrowOopModeToString(NARROW_OOP_MODE mode) { |
| switch (mode) { |
| case UnscaledNarrowOop: |
| return "32-bits Oops"; |
| case ZeroBasedNarrowOop: |
| return "zero based Compressed Oops"; |
| case HeapBasedNarrowOop: |
| return "Compressed Oops with base"; |
| } |
| return ""; |
| } |
| public CollectedHeap heap() { |
| return (CollectedHeap) heapConstructor.instantiateWrapperFor(collectedHeapField.getValue()); |
| } |
| |
| public static long getNarrowOopBase() { |
| if (narrowOopBaseField.getValue() == null) { |
| return 0; |
| } else { |
| return narrowOopBaseField.getValue().minus(null); |
| } |
| } |
| |
| public static int getNarrowOopShift() { |
| return (int)narrowOopShiftField.getValue(); |
| } |
| |
| public static long getNarrowKlassBase() { |
| if (narrowKlassBaseField.getValue() == null) { |
| return 0; |
| } else { |
| return narrowKlassBaseField.getValue().minus(null); |
| } |
| } |
| |
| public static int getNarrowKlassShift() { |
| return (int)narrowKlassShiftField.getValue(); |
| } |
| |
| |
| /** Returns "TRUE" iff "p" points into the allocated area of the heap. */ |
| public boolean isIn(Address p) { |
| return heap().isIn(p); |
| } |
| |
| /** Returns "TRUE" iff "p" points into the reserved area of the heap. */ |
| public boolean isInReserved(Address p) { |
| return heap().isInReserved(p); |
| } |
| |
| private Oop newOop(OopHandle handle) { |
| return VM.getVM().getObjectHeap().newOop(handle); |
| } |
| |
| public Oop mainThreadGroup() { |
| return newOop(mainThreadGroupField.getValue()); |
| } |
| |
| public Oop systemThreadGroup() { |
| return newOop(systemThreadGroupField.getValue()); |
| } |
| |
| |
| public void print() { printOn(System.out); } |
| public void printOn(PrintStream tty) { |
| heap().printOn(tty); |
| } |
| |
| // Check whether an element of a typeArrayOop with the given type must be |
| // aligned 0 mod 8. The typeArrayOop itself must be aligned at least this |
| // strongly. |
| public static boolean elementTypeShouldBeAligned(BasicType type) { |
| return type == BasicType.T_DOUBLE || type == BasicType.T_LONG; |
| } |
| |
| // Check whether an object field (static/non-static) of the given type must be |
| // aligned 0 mod 8. |
| public static boolean fieldTypeShouldBeAligned(BasicType type) { |
| return type == BasicType.T_DOUBLE || type == BasicType.T_LONG; |
| } |
| } |