--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/Oop.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,216 @@
+/*
+ * Copyright (c) 2000, 2013, 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.oops;
+
+import java.io.*;
+import java.util.*;
+import sun.jvm.hotspot.utilities.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.types.*;
+
+// Oop represents the superclass for all types of
+// objects in the HotSpot object heap.
+
+public class Oop {
+ static {
+ VM.registerVMInitializedObserver(new Observer() {
+ public void update(Observable o, Object data) {
+ initialize(VM.getVM().getTypeDataBase());
+ }
+ });
+ }
+
+ private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
+ Type type = db.lookupType("oopDesc");
+ mark = new CIntField(type.getCIntegerField("_mark"), 0);
+ klass = new MetadataField(type.getAddressField("_metadata._klass"), 0);
+ compressedKlass = new NarrowKlassField(type.getAddressField("_metadata._compressed_klass"), 0);
+ headerSize = type.getSize();
+ }
+
+ private OopHandle handle;
+ private ObjectHeap heap;
+
+ Oop(OopHandle handle, ObjectHeap heap) {
+ this.handle = handle;
+ this.heap = heap;
+ }
+
+ ObjectHeap getHeap() { return heap; }
+
+ /** Should not be used or needed by most clients outside this
+ package; is needed, however, by {@link
+ sun.jvm.hotspot.utilities.MarkBits}. */
+ public OopHandle getHandle() { return handle; }
+
+ private static long headerSize;
+ public static long getHeaderSize() { return headerSize; } // Header size in bytes.
+
+ private static CIntField mark;
+ private static MetadataField klass;
+ private static NarrowKlassField compressedKlass;
+
+ // Accessors for declared fields
+ public Mark getMark() { return new Mark(getHandle()); }
+ public Klass getKlass() {
+ if (VM.getVM().isCompressedKlassPointersEnabled()) {
+ return (Klass)compressedKlass.getValue(getHandle());
+ } else {
+ return (Klass)klass.getValue(getHandle());
+ }
+ }
+
+ public boolean isA(Klass k) {
+ return getKlass().isSubtypeOf(k);
+ }
+
+ // Returns the byte size of this object
+ public long getObjectSize() {
+ Klass k = getKlass();
+ // All other types should be overriding getObjectSize directly
+ return ((InstanceKlass)k).getObjectSize(this);
+ }
+
+ // Type test operations
+ public boolean isInstance() { return false; }
+ public boolean isInstanceRef() { return false; }
+ public boolean isArray() { return false; }
+ public boolean isObjArray() { return false; }
+ public boolean isTypeArray() { return false; }
+ public boolean isThread() { return false; }
+
+ // Align the object size.
+ public static long alignObjectSize(long size) {
+ return VM.getVM().alignUp(size, VM.getVM().getMinObjAlignmentInBytes());
+ }
+
+ // All vm's align longs, so pad out certain offsets.
+ public static long alignObjectOffset(long offset) {
+ return VM.getVM().alignUp(offset, VM.getVM().getBytesPerLong());
+ }
+
+ public boolean equals(Object obj) {
+ if (obj != null && (obj instanceof Oop)) {
+ return getHandle().equals(((Oop) obj).getHandle());
+ }
+ return false;
+ }
+
+ public int hashCode() { return getHandle().hashCode(); }
+
+ /** Identity hash in the target VM */
+ public long identityHash() {
+ Mark mark = getMark();
+ if (mark.isUnlocked() && (!mark.hasNoHash())) {
+ return (int) mark.hash();
+ } else if (mark.isMarked()) {
+ return (int) mark.hash();
+ } else {
+ return slowIdentityHash();
+ }
+ }
+
+ public long slowIdentityHash() {
+ return VM.getVM().getObjectSynchronizer().identityHashValueFor(this);
+ }
+
+ public void iterate(OopVisitor visitor, boolean doVMFields) {
+ visitor.setObj(this);
+ visitor.prologue();
+ iterateFields(visitor, doVMFields);
+ visitor.epilogue();
+ }
+
+ void iterateFields(OopVisitor visitor, boolean doVMFields) {
+ if (doVMFields) {
+ visitor.doCInt(mark, true);
+ if (VM.getVM().isCompressedKlassPointersEnabled()) {
+ visitor.doMetadata(compressedKlass, true);
+ } else {
+ visitor.doMetadata(klass, true);
+ }
+ }
+ }
+
+ public void print() { printOn(System.out); }
+ public void printValue() { printValueOn(System.out); }
+ public void printRaw() { printRawOn(System.out); }
+
+ public static void printOopValueOn(Oop obj, PrintStream tty) {
+ if (obj == null) {
+ tty.print("null");
+ } else {
+ obj.printValueOn(tty);
+ tty.print(" @ " + obj.getHandle());
+ }
+ }
+
+ public static void printOopAddressOn(Oop obj, PrintStream tty) {
+ if (obj == null) {
+ tty.print("null");
+ } else {
+ tty.print(obj.getHandle().toString());
+ }
+ }
+
+ public void printOn(PrintStream tty) {
+ OopPrinter printer = new OopPrinter(tty);
+ iterate(printer, true);
+ }
+
+ public void printValueOn(PrintStream tty) {
+ try {
+ tty.print("Oop for " + getKlass().getName().asString());
+ } catch (java.lang.NullPointerException e) {
+ tty.print("Oop");
+ }
+ }
+
+ public void printRawOn(PrintStream tty) {
+ tty.print("Dumping raw memory for ");
+ printValueOn(tty);
+ tty.println();
+ long size = getObjectSize() * 4;
+ for (long i = 0; i < size; i += 4) {
+ long memVal = getHandle().getCIntegerAt(i, 4, true);
+ tty.println(Long.toHexString(memVal));
+ }
+ }
+
+ public boolean verify() { return true;}
+
+ // Package-private routine to speed up ObjectHeap.newOop
+ static Klass getKlassForOopHandle(OopHandle handle) {
+ if (handle == null) {
+ return null;
+ }
+ if (VM.getVM().isCompressedKlassPointersEnabled()) {
+ return (Klass)Metadata.instantiateWrapperFor(handle.getCompKlassAddressAt(compressedKlass.getOffset()));
+ } else {
+ return (Klass)Metadata.instantiateWrapperFor(handle.getAddressAt(klass.getOffset()));
+ }
+ }
+};