01: //
02: // Copyright (C) 2005 United States Government as represented by the
03: // Administrator of the National Aeronautics and Space Administration
04: // (NASA). All Rights Reserved.
05: //
06: // This software is distributed under the NASA Open Source Agreement
07: // (NOSA), version 1.3. The NOSA has been approved by the Open Source
08: // Initiative. See the file NOSA-1.3-JPF at the top of the distribution
09: // directory tree for the complete NOSA document.
10: //
11: // THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY
12: // KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT
13: // LIMITED TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO
14: // SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
15: // A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT
16: // THE SUBJECT SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY THAT
17: // DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE SUBJECT SOFTWARE.
18: //
19: package gov.nasa.jpf.jvm.bytecode;
20:
21: import gov.nasa.jpf.jvm.ArrayIndexOutOfBoundsExecutiveException;
22: import gov.nasa.jpf.jvm.ElementInfo;
23: import gov.nasa.jpf.jvm.KernelState;
24: import gov.nasa.jpf.jvm.SystemState;
25: import gov.nasa.jpf.jvm.ThreadInfo;
26:
27: /**
28: * abstraction for all array store instructions
29: */
30: public abstract class ArrayStoreInstruction extends ArrayInstruction
31: implements StoreInstruction {
32: public Instruction execute(SystemState ss, KernelState ks,
33: ThreadInfo th) {
34: long value;
35: int index;
36: int arrayRef;
37:
38: value = getValue(th);
39: index = th.pop();
40: arrayRef = th.pop();
41:
42: ElementInfo e = ks.da.get(arrayRef);
43:
44: if (arrayRef == -1) {
45: return th
46: .createAndThrowException("java.lang.NullPointerException");
47: }
48:
49: try {
50: setField(e, index, value);
51:
52: return getNext(th);
53: } catch (ArrayIndexOutOfBoundsExecutiveException ex) {
54: return ex.getInstruction();
55: }
56: }
57:
58: protected void setField(ElementInfo e, int index, long value)
59: throws ArrayIndexOutOfBoundsExecutiveException {
60: e.checkArrayBounds(index);
61: e.setElement(index, (int) value);
62: }
63:
64: protected long getValue(ThreadInfo th) {
65: return (long) th.pop();
66: }
67:
68: public boolean isSchedulingRelevant(SystemState ss, KernelState ks,
69: ThreadInfo ti) {
70: // should be further discriminated based on if the array object
71: // is reachable for multiple threads
72: if (ti.usePorFieldBoundaries()) {
73: int off = getElementSize() + 1;
74: if (ks.da.isSchedulingRelevantObject(ti.peek(off))
75: && ti.hasOtherRunnables()) {
76: return true;
77: }
78: }
79:
80: return false;
81: }
82: }
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