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.FieldInfo;
22: import gov.nasa.jpf.jvm.ClassInfo;
23: import gov.nasa.jpf.jvm.KernelState;
24: import gov.nasa.jpf.jvm.ThreadInfo;
25:
26: /**
27: * class to abstract instructions accessing static fields
28: */
29: public abstract class StaticFieldInstruction extends FieldInstruction {
30:
31: public FieldInfo getFieldInfo() {
32: if (fi == null) {
33: ClassInfo ci = ClassInfo.getClassInfo(className);
34: if (ci != null) {
35: fi = ci.getStaticField(fname);
36: }
37: }
38: return fi;
39: }
40:
41: boolean isSchedulingRelevant(KernelState ks, ThreadInfo ti) {
42: if (!ti.hasOtherRunnables()) {
43: return false;
44: }
45:
46: if (ti.usePorSyncDetection()) {
47: if (isLockProtected(ks.sa.get(className), ti)) {
48: return false;
49: }
50: }
51:
52: return true;
53: }
54:
55: }
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