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/* |
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* Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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package sun.jvm.hotspot.gc.g1; |
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import java.io.PrintStream; |
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import java.util.Iterator; |
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import java.util.Observable; |
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import java.util.Observer; |
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import sun.jvm.hotspot.debugger.Address; |
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import sun.jvm.hotspot.gc.shared.CollectedHeap; |
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import sun.jvm.hotspot.gc.shared.CollectedHeapName; |
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import sun.jvm.hotspot.gc.shared.SpaceClosure; |
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import sun.jvm.hotspot.memory.MemRegion; |
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import sun.jvm.hotspot.runtime.VM; |
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import sun.jvm.hotspot.runtime.VMObjectFactory; |
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import sun.jvm.hotspot.types.AddressField; |
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import sun.jvm.hotspot.types.CIntegerField; |
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import sun.jvm.hotspot.types.Type; |
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import sun.jvm.hotspot.types.TypeDataBase; |
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// Mirror class for G1CollectedHeap. |
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public class G1CollectedHeap extends CollectedHeap { |
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// HeapRegionManager _hrm; |
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static private long hrmFieldOffset; |
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// MemRegion _g1_reserved; |
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static private long g1ReservedFieldOffset; |
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// size_t _summary_bytes_used; |
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static private CIntegerField summaryBytesUsedField; |
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// G1MonitoringSupport* _g1mm; |
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static private AddressField g1mmField; |
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// HeapRegionSet _old_set; |
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static private long oldSetFieldOffset; |
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// HeapRegionSet _humongous_set; |
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static private long humongousSetFieldOffset; |
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static { |
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VM.registerVMInitializedObserver(new Observer() { |
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public void update(Observable o, Object data) { |
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initialize(VM.getVM().getTypeDataBase()); |
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} |
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}); |
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} |
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static private synchronized void initialize(TypeDataBase db) { |
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Type type = db.lookupType("G1CollectedHeap"); |
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hrmFieldOffset = type.getField("_hrm").getOffset(); |
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summaryBytesUsedField = type.getCIntegerField("_summary_bytes_used"); |
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g1mmField = type.getAddressField("_g1mm"); |
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oldSetFieldOffset = type.getField("_old_set").getOffset(); |
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humongousSetFieldOffset = type.getField("_humongous_set").getOffset(); |
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} |
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public long capacity() { |
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return hrm().capacity(); |
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} |
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public long used() { |
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return summaryBytesUsedField.getValue(addr); |
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} |
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public long n_regions() { |
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return hrm().length(); |
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} |
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private HeapRegionManager hrm() { |
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Address hrmAddr = addr.addOffsetTo(hrmFieldOffset); |
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return (HeapRegionManager) VMObjectFactory.newObject(HeapRegionManager.class, |
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hrmAddr); |
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} |
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public G1MonitoringSupport g1mm() { |
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Address g1mmAddr = g1mmField.getValue(addr); |
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return (G1MonitoringSupport) VMObjectFactory.newObject(G1MonitoringSupport.class, g1mmAddr); |
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} |
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public HeapRegionSetBase oldSet() { |
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Address oldSetAddr = addr.addOffsetTo(oldSetFieldOffset); |
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return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, |
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oldSetAddr); |
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} |
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public HeapRegionSetBase humongousSet() { |
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Address humongousSetAddr = addr.addOffsetTo(humongousSetFieldOffset); |
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return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, |
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humongousSetAddr); |
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} |
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private Iterator<HeapRegion> heapRegionIterator() { |
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return hrm().heapRegionIterator(); |
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} |
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public void heapRegionIterate(SpaceClosure scl) { |
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Iterator<HeapRegion> iter = heapRegionIterator(); |
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while (iter.hasNext()) { |
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HeapRegion hr = iter.next(); |
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scl.doSpace(hr); |
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} |
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} |
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public CollectedHeapName kind() { |
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return CollectedHeapName.G1_COLLECTED_HEAP; |
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} |
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@Override |
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public void printOn(PrintStream tty) { |
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MemRegion mr = reservedRegion(); |
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tty.print("garbage-first heap"); |
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tty.print(" [" + mr.start() + ", " + mr.end() + "]"); |
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tty.println(" region size " + (HeapRegion.grainBytes() / 1024) + "K"); |
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} |
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public G1CollectedHeap(Address addr) { |
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super(addr); |
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} |
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} |