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comparison agent/src/share/classes/sun/jvm/hotspot/gc_implementation/g1/G1CollectedHeap.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
parents a8ea2f110d87
children
comparison
equal deleted inserted replaced
20403:8ec8971f511a 20404:227a9e5e4b4a
34 import sun.jvm.hotspot.memory.SharedHeap; 34 import sun.jvm.hotspot.memory.SharedHeap;
35 import sun.jvm.hotspot.memory.SpaceClosure; 35 import sun.jvm.hotspot.memory.SpaceClosure;
36 import sun.jvm.hotspot.runtime.VM; 36 import sun.jvm.hotspot.runtime.VM;
37 import sun.jvm.hotspot.runtime.VMObjectFactory; 37 import sun.jvm.hotspot.runtime.VMObjectFactory;
38 import sun.jvm.hotspot.types.AddressField; 38 import sun.jvm.hotspot.types.AddressField;
39 import sun.jvm.hotspot.types.CIntegerField;
40 import sun.jvm.hotspot.types.Type; 39 import sun.jvm.hotspot.types.Type;
41 import sun.jvm.hotspot.types.TypeDataBase; 40 import sun.jvm.hotspot.types.TypeDataBase;
42 41
43 // Mirror class for G1CollectedHeap. 42 // Mirror class for G1CollectedHeap.
44 43
45 public class G1CollectedHeap extends SharedHeap { 44 public class G1CollectedHeap extends SharedHeap {
46 // HeapRegionManager _hrm; 45 // HeapRegionManager _hrm;
47 static private long hrmFieldOffset; 46 static private long hrmFieldOffset;
48 // MemRegion _g1_reserved; 47 // MemRegion _g1_reserved;
49 static private long g1ReservedFieldOffset; 48 static private long g1ReservedFieldOffset;
50 // size_t _summary_bytes_used; 49 // G1Allocator* _allocator
51 static private CIntegerField summaryBytesUsedField; 50 static private AddressField g1Allocator;
52 // G1MonitoringSupport* _g1mm; 51 // G1MonitoringSupport* _g1mm;
53 static private AddressField g1mmField; 52 static private AddressField g1mmField;
54 // HeapRegionSet _old_set; 53 // HeapRegionSet _old_set;
55 static private long oldSetFieldOffset; 54 static private long oldSetFieldOffset;
56 // HeapRegionSet _humongous_set; 55 // HeapRegionSet _humongous_set;
66 65
67 static private synchronized void initialize(TypeDataBase db) { 66 static private synchronized void initialize(TypeDataBase db) {
68 Type type = db.lookupType("G1CollectedHeap"); 67 Type type = db.lookupType("G1CollectedHeap");
69 68
70 hrmFieldOffset = type.getField("_hrm").getOffset(); 69 hrmFieldOffset = type.getField("_hrm").getOffset();
71 summaryBytesUsedField = type.getCIntegerField("_summary_bytes_used"); 70 g1Allocator = type.getAddressField("_allocator");
72 g1mmField = type.getAddressField("_g1mm"); 71 g1mmField = type.getAddressField("_g1mm");
73 oldSetFieldOffset = type.getField("_old_set").getOffset(); 72 oldSetFieldOffset = type.getField("_old_set").getOffset();
74 humongousSetFieldOffset = type.getField("_humongous_set").getOffset(); 73 humongousSetFieldOffset = type.getField("_humongous_set").getOffset();
75 } 74 }
76 75
77 public long capacity() { 76 public long capacity() {
78 return hrm().capacity(); 77 return hrm().capacity();
79 } 78 }
80 79
81 public long used() { 80 public long used() {
82 return summaryBytesUsedField.getValue(addr); 81 return allocator().getSummaryBytes();
83 } 82 }
84 83
85 public long n_regions() { 84 public long n_regions() {
86 return hrm().length(); 85 return hrm().length();
87 } 86 }
93 } 92 }
94 93
95 public G1MonitoringSupport g1mm() { 94 public G1MonitoringSupport g1mm() {
96 Address g1mmAddr = g1mmField.getValue(addr); 95 Address g1mmAddr = g1mmField.getValue(addr);
97 return (G1MonitoringSupport) VMObjectFactory.newObject(G1MonitoringSupport.class, g1mmAddr); 96 return (G1MonitoringSupport) VMObjectFactory.newObject(G1MonitoringSupport.class, g1mmAddr);
97 }
98
99 public G1Allocator allocator() {
100 Address g1AllocatorAddr = g1Allocator.getValue(addr);
101 return (G1Allocator) VMObjectFactory.newObject(G1Allocator.class, g1AllocatorAddr);
98 } 102 }
99 103
100 public HeapRegionSetBase oldSet() { 104 public HeapRegionSetBase oldSet() {
101 Address oldSetAddr = addr.addOffsetTo(oldSetFieldOffset); 105 Address oldSetAddr = addr.addOffsetTo(oldSetFieldOffset);
102 return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, 106 return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class,