public static void makeFieldsSymbolic(MJIEnv env, int objRef, int stringRef, int objvRef) {
// makes all the fields of obj v symbolic and adds obj v to the symbolic heap to kick off lazy
// initialization
if (objvRef == -1) throw new RuntimeException("## Error: null object");
// introduce a heap choice generator for the element in the heap
ThreadInfo ti = env.getVM().getCurrentThread();
SystemState ss = env.getVM().getSystemState();
ChoiceGenerator<?> cg;
if (!ti.isFirstStepInsn()) {
cg = new HeapChoiceGenerator(1); // new
ss.setNextChoiceGenerator(cg);
env.repeatInvocation();
return; // not used anyways
}
// else this is what really returns results
cg = ss.getChoiceGenerator();
assert (cg instanceof HeapChoiceGenerator) : "expected HeapChoiceGenerator, got: " + cg;
// see if there were more inputs added before
ChoiceGenerator<?> prevHeapCG = cg.getPreviousChoiceGenerator();
while (!((prevHeapCG == null) || (prevHeapCG instanceof HeapChoiceGenerator))) {
prevHeapCG = prevHeapCG.getPreviousChoiceGenerator();
}
PathCondition pcHeap;
SymbolicInputHeap symInputHeap;
if (prevHeapCG == null) {
pcHeap = new PathCondition();
symInputHeap = new SymbolicInputHeap();
} else {
pcHeap = ((HeapChoiceGenerator) prevHeapCG).getCurrentPCheap();
symInputHeap = ((HeapChoiceGenerator) prevHeapCG).getCurrentSymInputHeap();
}
// set all the fields to be symbolic
ClassInfo ci = env.getClassInfo(objvRef);
FieldInfo[] fields = ci.getDeclaredInstanceFields();
FieldInfo[] staticFields = ci.getDeclaredStaticFields();
String name = env.getStringObject(stringRef);
String refChain =
name + "[" + objvRef
+ "]"; // why is the type used here? should use the name of the field instead
SymbolicInteger newSymRef = new SymbolicInteger(refChain);
// ElementInfo eiRef = DynamicArea.getHeap().get(objvRef);
ElementInfo eiRef = JVM.getVM().getHeap().get(objvRef);
Helper.initializeInstanceFields(fields, eiRef, refChain);
Helper.initializeStaticFields(staticFields, ci, ti);
// create new HeapNode based on above info
// update associated symbolic input heap
ClassInfo typeClassInfo = eiRef.getClassInfo();
HeapNode n = new HeapNode(objvRef, typeClassInfo, newSymRef);
symInputHeap._add(n);
pcHeap._addDet(Comparator.NE, newSymRef, new IntegerConstant(-1));
((HeapChoiceGenerator) cg).setCurrentPCheap(pcHeap);
((HeapChoiceGenerator) cg).setCurrentSymInputHeap(symInputHeap);
// System.out.println(">>>>>>>>>>>> initial pcHeap: " + pcHeap.toString());
return;
}
public static HelperResult addNewArrayHeapNode(
ClassInfo typeClassInfo,
ThreadInfo ti,
Object attr,
PathCondition pcHeap,
SymbolicInputHeap symInputHeap,
int numSymRefs,
HeapNode[] prevSymRefs,
boolean setShared,
IntegerExpression indexAttr,
int arrayRef) {
int daIndex = ti.getHeap().newObject(typeClassInfo, ti).getObjectRef();
ti.getHeap().registerPinDown(daIndex);
String refChain =
((ArrayExpression) attr)
.getName(); // + "[" + daIndex + "]"; // do we really need to add daIndex here?
SymbolicInteger newSymRef = new SymbolicInteger(refChain);
ElementInfo eiRef =
ti.getModifiableElementInfo(daIndex); // ti.getElementInfo(daIndex); // TODO to review!
if (setShared) {
eiRef.setShared(ti, true); // ??
}
// daIndex.getObjectRef() -> number
// neha: this change allows all the fields in the class hierarchy of the
// object to be initialized as symbolic and not just its instance fields
int numOfFields = eiRef.getNumberOfFields();
FieldInfo[] fields = new FieldInfo[numOfFields];
for (int fieldIndex = 0; fieldIndex < numOfFields; fieldIndex++) {
fields[fieldIndex] = eiRef.getFieldInfo(fieldIndex);
}
Helper.initializeInstanceFields(fields, eiRef, refChain);
// neha: this change allows all the static fields in the class hierarchy
// of the object to be initialized as symbolic and not just its immediate
// static fields
ClassInfo superClass = typeClassInfo;
while (superClass != null) {
FieldInfo[] staticFields = superClass.getDeclaredStaticFields();
Helper.initializeStaticFields(staticFields, superClass, ti);
superClass = superClass.getSuperClass();
}
// Put symbolic array in PC if we create a new array.
if (typeClassInfo.isArray()) {
String typeClass = typeClassInfo.getType();
ArrayExpression arrayAttr = null;
if (typeClass.charAt(1) != 'L') {
arrayAttr = new ArrayExpression(eiRef.toString());
} else {
arrayAttr =
new ArrayExpression(eiRef.toString(), typeClass.substring(2, typeClass.length() - 1));
}
ti.getVM()
.getLastChoiceGeneratorOfType(PCChoiceGenerator.class)
.getCurrentPC()
.arrayExpressions
.put(eiRef.toString(), arrayAttr);
}
// create new HeapNode based on above info
// update associated symbolic input heap
ArrayHeapNode n = new ArrayHeapNode(daIndex, typeClassInfo, newSymRef, indexAttr, arrayRef);
symInputHeap._add(n);
pcHeap._addDet(Comparator.NE, newSymRef, new IntegerConstant(-1));
pcHeap._addDet(Comparator.EQ, newSymRef, new IntegerConstant(numSymRefs));
for (int i = 0; i < numSymRefs; i++)
pcHeap._addDet(Comparator.NE, n.getSymbolic(), prevSymRefs[i].getSymbolic());
HelperResult result = new HelperResult(n, daIndex);
return result;
}