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.JPFException;
22: import gov.nasa.jpf.jvm.ClassInfo;
23: import gov.nasa.jpf.jvm.ElementInfo;
24: import gov.nasa.jpf.jvm.KernelState;
25: import gov.nasa.jpf.jvm.SystemState;
26: import gov.nasa.jpf.jvm.ThreadInfo;
27:
28: import gov.nasa.jpf.jvm.FieldInfo;
29:
30: /**
31: * Set static field in class
32: * ..., value => ...
33: */
34: public class PUTSTATIC extends StaticFieldInstruction implements
35: StoreInstruction {
36: public Instruction execute(SystemState ss, KernelState ks,
37: ThreadInfo ti) {
38: ClassInfo ci = ClassInfo.getClassInfo(className);
39: ElementInfo ei = ks.sa.get(className);
40: FieldInfo fi = getFieldInfo();
41:
42: switch (fi.getStorageSize()) {
43: case 1:
44: int ival = ti.pop();
45:
46: if (fi.isReference()) {
47: ei.setReferenceField(fi, ival);
48: } else {
49: ei.setIntField(fi, ival);
50: }
51: break;
52: case 2:
53: long lval = ti.longPop();
54: ei.setLongField(fi, lval);
55: break;
56: default:
57: throw new JPFException("invalid field type");
58: }
59:
60: return getNext(ti);
61: }
62:
63: public int getByteCode() {
64: return 0xB3;
65: }
66:
67: public boolean isSchedulingRelevant(SystemState ss, KernelState ks,
68: ThreadInfo ti) {
69: // again very conservative - doesn't take into account if the object
70: // can be accessed from different threads, but that would be a static
71: // attribute (i.e. require statis analysis)
72: if (ti.usePorFieldBoundaries()) {
73: return isSchedulingRelevant(ks, ti);
74: }
75: return false;
76: }
77: }
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