void printChoices() {
int i = 0;
SystemState ss = vm.getSystemState();
ChoiceGenerator<?>[] cgStack = ss.getChoiceGenerators();
nextChoice:
for (ChoiceGenerator<?> cg : cgStack) {
if (isRelevantCG(cg) && !cg.isDone()) {
Object choice = cg.getNextChoice();
if (choice == null) {
continue;
} else {
if (excludes != null) {
for (String e : excludes) {
if (choice.toString().startsWith(e)) {
continue nextChoice;
}
}
}
}
String line = null;
switch (format) {
case CHOICE:
line = choice.toString();
if (line.startsWith("gov.nasa.jpf.jvm.")) {
line = line.substring(17);
}
break;
case CG:
line = cg.toString();
if (line.startsWith("gov.nasa.jpf.jvm.choice.")) {
line = line.substring(24);
}
break;
}
if (line != null) {
pw.print(String.format("%4d: ", i++));
pw.print(line);
if (showLocation) {
String loc = cg.getSourceLocation();
if (loc != null) {
pw.println();
pw.print(" \tat ");
pw.print(loc);
}
}
pw.println();
}
}
}
}
@Override
public Instruction execute(SystemState ss, KernelState ks, ThreadInfo ti) {
StackFrame sf = ti.getTopFrame();
IntegerExpression sym_v1 = (IntegerExpression) sf.getOperandAttr(1);
IntegerExpression sym_v2 = (IntegerExpression) sf.getOperandAttr(0);
if ((sym_v1 == null) && (sym_v2 == null)) { // both conditions are concrete
// System.out.println("Execute IF_ICMPEQ: The conditions are concrete");
return super.execute(ss, ks, ti);
} else { // at least one condition is symbolic
ChoiceGenerator<?> cg;
if (!ti.isFirstStepInsn()) { // first time around
cg = new PCChoiceGenerator(2);
ss.setNextChoiceGenerator(cg);
return this;
} else { // this is what really returns results
cg = ss.getChoiceGenerator();
assert (cg instanceof PCChoiceGenerator) : "expected PCChoiceGenerator, got: " + cg;
conditionValue = (Integer) cg.getNextChoice() == 0 ? false : true;
}
int v2 = ti.pop();
int v1 = ti.pop();
// System.out.println("Execute IF_ICMPEQ: "+ conditionValue);
PathCondition pc;
// pc is updated with the pc stored in the choice generator above
// get the path condition from the
// previous choice generator of the same type
ChoiceGenerator<?> prev_cg = cg.getPreviousChoiceGenerator();
while (!((prev_cg == null) || (prev_cg instanceof PCChoiceGenerator))) {
prev_cg = prev_cg.getPreviousChoiceGenerator();
}
if (prev_cg == null) pc = new PathCondition();
else pc = ((PCChoiceGenerator) prev_cg).getCurrentPC();
assert pc != null;
if (conditionValue) {
if (sym_v1 != null) {
if (sym_v2 != null) { // both are symbolic values
pc._addDet(Comparator.EQ, sym_v1, sym_v2);
} else pc._addDet(Comparator.EQ, sym_v1, v2);
} else pc._addDet(Comparator.EQ, v1, sym_v2);
if (!pc.simplify()) { // not satisfiable
ss.setIgnored(true);
} else {
// pc.solve();
((PCChoiceGenerator) cg).setCurrentPC(pc);
// System.out.println(((PCChoiceGenerator) cg).getCurrentPC());
}
return getTarget();
} else {
if (sym_v1 != null) {
if (sym_v2 != null) { // both are symbolic values
pc._addDet(Comparator.NE, sym_v1, sym_v2);
} else pc._addDet(Comparator.NE, sym_v1, v2);
} else pc._addDet(Comparator.NE, v1, sym_v2);
if (!pc.simplify()) { // not satisfiable
ss.setIgnored(true);
} else {
// pc.solve();
((PCChoiceGenerator) cg).setCurrentPC(pc);
// System.out.println(((PCChoiceGenerator) cg).getCurrentPC());
}
return getNext(ti);
}
}
}
