public Instruction execute(SystemState ss, KernelState ks, ThreadInfo th) {
StackFrame sf = th.getTopFrame();
RealExpression sym_v1 = (RealExpression) sf.getLongOperandAttr();
double v1 = Types.longToDouble(th.longPop());
RealExpression sym_v2 = (RealExpression) sf.getLongOperandAttr();
double v2 = Types.longToDouble(th.longPop());
double r = v1 * v2;
if (sym_v1 == null && sym_v2 == null) th.longPush(Types.doubleToLong(r));
else th.longPush(0);
RealExpression result = null;
if (sym_v2 != null) {
if (sym_v1 != null) result = sym_v2._mul(sym_v1);
else // v1 is concrete
result = sym_v2._mul(v1);
} else if (sym_v1 != null) result = sym_v1._mul(v2);
sf.setLongOperandAttr(result);
// System.out.println("Execute DMUL: "+ sf.getLongOperandAttr());
return getNext(th);
}
public Instruction execute(SystemState ss, KernelState ks, ThreadInfo th) {
RealExpression sym_fval = (RealExpression) th.getTopFrame().getOperandAttr();
if (sym_fval == null) {
return super.execute(ss, ks, th);
} else {
// System.out.println("Execute symbolic F2L");
// here we get a hold of the current path condition and
// add an extra mixed constraint sym_dval==sym_ival
ChoiceGenerator<?> cg;
if (!th.isFirstStepInsn()) { // first time around
cg = new PCChoiceGenerator(1); // only one choice
ss.setNextChoiceGenerator(cg);
return this;
} else { // this is what really returns results
cg = ss.getChoiceGenerator();
assert (cg instanceof PCChoiceGenerator) : "expected PCChoiceGenerator, got: " + cg;
}
// get the path condition from the
// previous choice generator of the same type
PathCondition pc;
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(); // TODO: handling of preconditions needs to be changed
else pc = ((PCChoiceGenerator) prev_cg).getCurrentPC();
assert pc != null;
th.pop();
th.longPush(0); // for symbolic expressions, the concrete value does not matter
SymbolicInteger sym_lval = new SymbolicInteger();
StackFrame sf = th.getTopFrame();
sf.setLongOperandAttr(sym_lval);
pc._addDet(Comparator.EQ, sym_fval, sym_lval);
if (!pc.simplify()) { // not satisfiable
ss.setIgnored(true);
} else {
// pc.solve();
((PCChoiceGenerator) cg).setCurrentPC(pc);
// System.out.println(((PCChoiceGenerator) cg).getCurrentPC());
}
// System.out.println("Execute D2I: " + sf.getLongOperandAttr());
return getNext(th);
}
}
public Instruction execute(SystemState ss, KernelState ks, ThreadInfo th) {
long v1 = th.longPop();
long v2 = th.longPop();
if (v1 == 0) {
return th.createAndThrowException("java.lang.ArithmeticException", "division by zero");
}
th.longPush(v2 % v1);
return getNext(th);
}
void pushArguments(ThreadInfo ti, Object[] args, Object[] attrs) {
if (args != null) {
for (int i = 0; i < args.length; i++) {
Object a = args[i];
boolean isLong = false;
if (a != null) {
if (a instanceof Ref) {
ti.push(((Ref) a).getReference(), true);
} else if (a instanceof Boolean) {
ti.push((Boolean) a ? 1 : 0, false);
} else if (a instanceof Integer) {
ti.push((Integer) a, false);
} else if (a instanceof Long) {
ti.longPush((Long) a);
isLong = true;
} else if (a instanceof Double) {
ti.longPush(Types.doubleToLong((Double) a));
isLong = true;
} else if (a instanceof Byte) {
ti.push((Byte) a, false);
} else if (a instanceof Short) {
ti.push((Short) a, false);
} else if (a instanceof Float) {
ti.push(Types.floatToInt((Float) a), false);
}
}
if (attrs != null && attrs[i] != null) {
if (isLong) {
ti.setLongOperandAttr(attrs[i]);
} else {
ti.setOperandAttr(attrs[i]);
}
}
}
}
}
public Instruction execute(SystemState ss, KernelState ks, ThreadInfo th) {
th.longPush(value);
return getNext(th);
}
