Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/vm/GenericSGOIDHeap.java @ 0:61d41facf527

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
parents
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
1 /*
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
2 * Copyright (C) 2014, United States Government, as represented by the
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
3 * Administrator of the National Aeronautics and Space Administration.
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
4 * All rights reserved.
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
5 *
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
8 * in compliance with the License. You may obtain a copy of the License at
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
9 *
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
10 * http://www.apache.org/licenses/LICENSE-2.0.
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
11 *
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
12 * Unless required by applicable law or agreed to in writing, software
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
13 * distributed under the License is distributed on an "AS IS" BASIS,
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
15 * See the License for the specific language governing permissions and
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
16 * limitations under the License.
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
17 */
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
18 package gov.nasa.jpf.vm;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
19
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
20 import gov.nasa.jpf.Config;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
21 import gov.nasa.jpf.util.IntTable;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
22
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
23 /**
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
24 * abstract Heap trait that implements SGOIDs by means of a search global
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
25 * Allocation map and a state managed allocCount map
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
26 *
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
27 * NOTE - a reference value of 0 represents null and therefore is not a valid SGOID
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
28 */
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
29 public abstract class GenericSGOIDHeap extends GenericHeap {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
30
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
31 static class GenericSGOIDHeapMemento extends GenericHeapMemento {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
32 IntTable.Snapshot<AllocationContext> ctxSnap;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
33
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
34 GenericSGOIDHeapMemento (GenericSGOIDHeap heap) {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
35 super(heap);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
36
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
37 ctxSnap = heap.allocCounts.getSnapshot();
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
38 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
39
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
40 @Override
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
41 public Heap restore(Heap inSitu) {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
42 super.restore( inSitu);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
43
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
44 GenericSGOIDHeap heap = (GenericSGOIDHeap) inSitu;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
45 heap.allocCounts.restore(ctxSnap);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
46
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
47 return heap;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
48 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
49 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
50
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
51 // these are search global
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
52 protected int nextSgoid;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
53 protected IntTable<Allocation> sgoids;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
54
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
55 // this is state managed
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
56 // NOTE - this has to be included in the mementos of concrete Heap implementations
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
57 protected IntTable<AllocationContext> allocCounts;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
58
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
59 protected GenericSGOIDHeap (Config config, KernelState ks){
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
60 super(config, ks);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
61
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
62 // static inits
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
63 initAllocationContext(config);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
64 sgoids = new IntTable<Allocation>();
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
65 nextSgoid = 0;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
66
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
67 allocCounts = new IntTable<AllocationContext>();
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
68 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
69
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
70
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
71 //--- to be overridden by subclasses that use different AllocationContext implementations
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
72
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
73 protected void initAllocationContext(Config config) {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
74 HashedAllocationContext.init(config);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
75 //PreciseAllocationContext.init(config);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
76 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
77
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
78 // these are always called directly from the allocation primitive, i.e. the allocating site is at a fixed
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
79 // stack offset (callers caller)
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
80 @Override
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
81 protected AllocationContext getSUTAllocationContext (ClassInfo ci, ThreadInfo ti) {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
82 return HashedAllocationContext.getSUTAllocationContext(ci, ti);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
83 //return PreciseAllocationContext.getSUTAllocationContext(ci, ti);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
84 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
85 @Override
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
86 protected AllocationContext getSystemAllocationContext (ClassInfo ci, ThreadInfo ti, int anchor) {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
87 return HashedAllocationContext.getSystemAllocationContext(ci, ti, anchor);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
88 //return PreciseAllocationContext.getSystemAllocationContext(ci, ti, anchor);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
89 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
90
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
91
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
92 @Override
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
93 protected int getNewElementInfoIndex (AllocationContext ctx) {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
94 int idx;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
95 int cnt;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
96
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
97 IntTable.Entry<AllocationContext> cntEntry = allocCounts.getInc(ctx);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
98 cnt = cntEntry.val;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
99
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
100 Allocation alloc = new Allocation(ctx, cnt);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
101
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
102 IntTable.Entry<Allocation> sgoidEntry = sgoids.get(alloc);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
103 if (sgoidEntry != null) { // we already had this one
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
104 idx = sgoidEntry.val;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
105
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
106 } else { // new entry
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
107 idx = ++nextSgoid;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
108 sgoids.put(alloc, idx);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
109 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
110
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
111 // sanity check - we do this here (and not in our super class) since we know how elements are stored
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
112 // assert get(idx) == null;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
113
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
114 return idx;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
115 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
116
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
117 }