| /* |
| * Copyright (c) 2011, 2015, 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.gc.g1; |
| |
| import java.io.PrintStream; |
| import java.util.Iterator; |
| import java.util.Observable; |
| import java.util.Observer; |
| |
| import sun.jvm.hotspot.debugger.Address; |
| import sun.jvm.hotspot.gc.shared.CollectedHeap; |
| import sun.jvm.hotspot.gc.shared.CollectedHeapName; |
| import sun.jvm.hotspot.gc.shared.SpaceClosure; |
| import sun.jvm.hotspot.memory.MemRegion; |
| import sun.jvm.hotspot.runtime.VM; |
| 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; |
| |
| // Mirror class for G1CollectedHeap. |
| |
| public class G1CollectedHeap extends CollectedHeap { |
| // HeapRegionManager _hrm; |
| static private long hrmFieldOffset; |
| // MemRegion _g1_reserved; |
| static private long g1ReservedFieldOffset; |
| // size_t _summary_bytes_used; |
| static private CIntegerField summaryBytesUsedField; |
| // G1MonitoringSupport* _g1mm; |
| static private AddressField g1mmField; |
| // HeapRegionSet _old_set; |
| static private long oldSetFieldOffset; |
| // HeapRegionSet _humongous_set; |
| static private long humongousSetFieldOffset; |
| |
| static { |
| VM.registerVMInitializedObserver(new Observer() { |
| public void update(Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| static private synchronized void initialize(TypeDataBase db) { |
| Type type = db.lookupType("G1CollectedHeap"); |
| |
| hrmFieldOffset = type.getField("_hrm").getOffset(); |
| summaryBytesUsedField = type.getCIntegerField("_summary_bytes_used"); |
| g1mmField = type.getAddressField("_g1mm"); |
| oldSetFieldOffset = type.getField("_old_set").getOffset(); |
| humongousSetFieldOffset = type.getField("_humongous_set").getOffset(); |
| } |
| |
| public long capacity() { |
| return hrm().capacity(); |
| } |
| |
| public long used() { |
| return summaryBytesUsedField.getValue(addr); |
| } |
| |
| public long n_regions() { |
| return hrm().length(); |
| } |
| |
| private HeapRegionManager hrm() { |
| Address hrmAddr = addr.addOffsetTo(hrmFieldOffset); |
| return (HeapRegionManager) VMObjectFactory.newObject(HeapRegionManager.class, |
| hrmAddr); |
| } |
| |
| public G1MonitoringSupport g1mm() { |
| Address g1mmAddr = g1mmField.getValue(addr); |
| return (G1MonitoringSupport) VMObjectFactory.newObject(G1MonitoringSupport.class, g1mmAddr); |
| } |
| |
| public HeapRegionSetBase oldSet() { |
| Address oldSetAddr = addr.addOffsetTo(oldSetFieldOffset); |
| return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, |
| oldSetAddr); |
| } |
| |
| public HeapRegionSetBase humongousSet() { |
| Address humongousSetAddr = addr.addOffsetTo(humongousSetFieldOffset); |
| return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, |
| humongousSetAddr); |
| } |
| |
| private Iterator<HeapRegion> heapRegionIterator() { |
| return hrm().heapRegionIterator(); |
| } |
| |
| public void heapRegionIterate(SpaceClosure scl) { |
| Iterator<HeapRegion> iter = heapRegionIterator(); |
| while (iter.hasNext()) { |
| HeapRegion hr = iter.next(); |
| scl.doSpace(hr); |
| } |
| } |
| |
| public CollectedHeapName kind() { |
| return CollectedHeapName.G1_COLLECTED_HEAP; |
| } |
| |
| @Override |
| public void printOn(PrintStream tty) { |
| MemRegion mr = reservedRegion(); |
| |
| tty.print("garbage-first heap"); |
| tty.print(" [" + mr.start() + ", " + mr.end() + "]"); |
| tty.println(" region size " + (HeapRegion.grainBytes() / 1024) + "K"); |
| } |
| |
| public G1CollectedHeap(Address addr) { |
| super(addr); |
| } |
| } |