jdk-sandbox: comparison src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/g1/G1HeapRegionTable.java

equal deleted inserted replaced

-:f9ace8da5e9c
+:d4380ee1cbe9
 /*
-* Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
+* Copyright (c) 2013, 2017, 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.
 import java.util.Iterator;
 import java.util.Observable;
 import java.util.Observer;
 import sun.jvm.hotspot.debugger.Address;
+import sun.jvm.hotspot.debugger.OopHandle;
 import sun.jvm.hotspot.runtime.VM;
 import sun.jvm.hotspot.runtime.VMObject;
 import sun.jvm.hotspot.runtime.VMObjectFactory;
 import sun.jvm.hotspot.types.AddressField;
 import sun.jvm.hotspot.types.CIntegerField;
 import sun.jvm.hotspot.types.Type;
 import sun.jvm.hotspot.types.TypeDataBase;
+import sun.jvm.hotspot.utilities.Assert;
 // Mirror class for G1HeapRegionTable. It's essentially an index -> HeapRegion map.
 public class G1HeapRegionTable extends VMObject {
 // HeapRegion** _base;
 }
 public G1HeapRegionTable(Address addr) {
 super(addr);
 }
+public HeapRegion getByAddress(Address addr) {
+if (Assert.ASSERTS_ENABLED) {
+Assert.that(addr instanceof OopHandle, "addr should be OopHandle");
+}
+long biasedIndex = addr.asLongValue() >>> shiftBy();
+return new HeapRegion(addr.addOffsetToAsOopHandle(biasedIndex * HeapRegion.getPointerSize()));
+}
 }