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annotate agent/src/share/classes/sun/jvm/hotspot/gc_implementation/g1/G1Allocator.java @ 20404:227a9e5e4b4a

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8057536: Refactor G1 to allow context specific allocations Summary: Splitting out a g1 allocator class to simply specialized allocators which can associate each allocation with a given context. Reviewed-by: mgerdin, brutisso
author sjohanss
date Fri, 05 Sep 2014 09:49:19 +0200
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20404
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1 package sun.jvm.hotspot.gc_implementation.g1;
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2
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3 import java.util.Observable;
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4 import java.util.Observer;
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5
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6 import sun.jvm.hotspot.debugger.Address;
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7 import sun.jvm.hotspot.runtime.VM;
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8 import sun.jvm.hotspot.runtime.VMObject;
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9 import sun.jvm.hotspot.types.CIntegerField;
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10 import sun.jvm.hotspot.types.Type;
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11 import sun.jvm.hotspot.types.TypeDataBase;
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12
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13 public class G1Allocator extends VMObject {
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15 //size_t _summary_bytes_used;
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16 static private CIntegerField summaryBytesUsedField;
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17
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18 static {
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19 VM.registerVMInitializedObserver(new Observer() {
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20 public void update(Observable o, Object data) {
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21 initialize(VM.getVM().getTypeDataBase());
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22 }
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23 });
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24 }
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25
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26 static private synchronized void initialize(TypeDataBase db) {
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27 Type type = db.lookupType("G1Allocator");
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28
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29 summaryBytesUsedField = type.getCIntegerField("_summary_bytes_used");
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30 }
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31
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32 public long getSummaryBytes() {
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33 return summaryBytesUsedField.getValue(addr);
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34 }
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35
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36 public G1Allocator(Address addr) {
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37 super(addr);
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38
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39 }
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40 }