/**
* Verifies several NULL object-related properties
*
* @param pLogger Logger to log the message
* @param pSmg SMG to check
* @return True if pSmg is consistent w.r.t. this criteria. False otherwise.
*/
private static boolean verifyNullObjectCLangProperties(LogManager pLogger, CLangSMG pSmg) {
// Verify that there is no NULL object in global scope
for (SMGObject obj : pSmg.getGlobalObjects().values()) {
if (!obj.notNull()) {
pLogger.log(
Level.SEVERE, "CLangSMG inconsistent: null object in global object set [" + obj + "]");
return false;
}
}
// Verify there is no more than one NULL object in the heap object set
SMGObject firstNull = null;
for (SMGObject obj : pSmg.getHeapObjects()) {
if (!obj.notNull()) {
if (firstNull != null) {
pLogger.log(
Level.SEVERE,
"CLangSMG inconsistent: second null object in heap object set [first="
+ firstNull
+ ", second="
+ obj
+ "]");
return false;
} else {
firstNull = obj;
}
}
}
// Verify there is no NULL object in the stack object set
for (CLangStackFrame frame : pSmg.getStackFrames()) {
for (SMGObject obj : frame.getAllObjects()) {
if (!obj.notNull()) {
pLogger.log(
Level.SEVERE, "CLangSMG inconsistent: null object in stack object set [" + obj + "]");
return false;
}
}
}
// Verify there is at least one NULL object
if (firstNull == null) {
pLogger.log(Level.SEVERE, "CLangSMG inconsistent: no null object");
return false;
}
return true;
}
/**
* Verify the stack name space: each record points to an appropriately labeled object
*
* @param pLogger Logger to log the message
* @param pSmg the current smg
* @return True if pSmg is consistent w.r.t. this criteria. False otherwise.
*/
private static boolean verifyStackNamespaces(LogManager pLogger, CLangSMG pSmg) {
HashSet<SMGObject> stack_objects = new HashSet<>();
for (CLangStackFrame frame : pSmg.getStackFrames()) {
for (SMGObject object : frame.getAllObjects()) {
if (stack_objects.contains(object)) {
pLogger.log(
Level.SEVERE,
"CLangSMG inconsistent: object [" + object + "] present multiple times in the stack");
return false;
}
stack_objects.add(object);
}
}
return true;
}
/**
* Verifies that global and stack object sets are disjunct
*
* @param pLogger Logger to log the message
* @param pSmg SMG to check
* @return True if pSmg is consistent w.r.t. this criteria. False otherwise.
*/
private static boolean verifyDisjunctGlobalAndStack(LogManager pLogger, CLangSMG pSmg) {
Deque<CLangStackFrame> stack_frames = pSmg.getStackFrames();
Set<SMGObject> stack = new HashSet<>();
for (CLangStackFrame frame : stack_frames) {
stack.addAll(frame.getAllObjects());
}
Map<String, SMGRegion> globals = pSmg.getGlobalObjects();
boolean toReturn = Collections.disjoint(stack, globals.values());
if (!toReturn) {
pLogger.log(Level.SEVERE, "CLangSMG inconsistent, global and stack objects are not disjoint");
}
return toReturn;
}
/**
* Verifies that heap and stack object sets are disjunct
*
* @param pLogger Logger to log the message
* @param pSmg SMG to check
* @return True if pSmg is consistent w.r.t. this criteria. False otherwise.
*/
private static boolean verifyDisjunctHeapAndStack(LogManager pLogger, CLangSMG pSmg) {
Deque<CLangStackFrame> stack_frames = pSmg.getStackFrames();
Set<SMGObject> stack = new HashSet<>();
for (CLangStackFrame frame : stack_frames) {
stack.addAll(frame.getAllObjects());
}
Set<SMGObject> heap = pSmg.getHeapObjects();
boolean toReturn = Collections.disjoint(stack, heap);
if (!toReturn) {
pLogger.log(
Level.SEVERE,
"CLangSMG inconsistent, heap and stack objects are not disjoint: "
+ Sets.intersection(stack, heap));
}
return toReturn;
}
/**
* Verifies that heap, global and stack union is equal to the set of all objects
*
* @param pLogger Logger to log the message
* @param pSmg SMG to check
* @return True if pSmg is consistent w.r.t. this criteria. False otherwise.
*/
private static boolean verifyStackGlobalHeapUnion(LogManager pLogger, CLangSMG pSmg) {
HashSet<SMGObject> object_union = new HashSet<>();
object_union.addAll(pSmg.getHeapObjects());
object_union.addAll(pSmg.getGlobalObjects().values());
for (CLangStackFrame frame : pSmg.getStackFrames()) {
object_union.addAll(frame.getAllObjects());
}
boolean toReturn =
object_union.containsAll(pSmg.getObjects()) && pSmg.getObjects().containsAll(object_union);
if (!toReturn) {
pLogger.log(
Level.SEVERE,
"CLangSMG inconsistent: union of stack, heap and global object is not the same set as the set of SMG objects");
}
return toReturn;
}