//Create a UPPAAL model from xml XDocument
public UppaalModel(XDocument xml, string countermeasure = "")
{
var nta = xml.Element ("nta");
globalDeclarations = getGlobalDeclarations(nta.Element("declaration").Value);
system = getSystem(nta.Element ("system").Value, countermeasure);
queries.AddRange(nta.XPathSelectElements("//queries/query/formula").Select(x => x.Value));
XMLHandler xlh = new XMLHandler(xml);
templates = xlh.getTemplates();//new List<Template>();
}
public void rewriteLocalFault(string path, string type = "")
{
string variableName = "";
// "" for locals fault, "opstack" for opstack fault
if(type == "")
{
variableName = "locs";
}else if(type == "opstack")
{
variableName = "os";
}
XElement localsFaultTemplateXML = XElement.Parse(XMLProvider.getFaultInjTemplate());
XMLHandler xhl = new XMLHandler();
Template localsFaultTemplate = xhl.getTemplate(localsFaultTemplateXML);
templates.Add(localsFaultTemplate);
foreach (var tem in templates)
{
if (!tem.name.Contains("Fault"))
{
foreach (var loc in tem.Locations)
{
if (loc.pc == null)
{
continue;
}
foreach (var tr in tem.Transitions)
{
if (tr.source.id == loc.id )
{
if(tr.grds.content != "")
{
tr.grds.content += " && faultTime > globalClock";
}
else
{
tr.grds.content = "faultTime > globalClock";
}
}
}
string posString1 = string.Format(
"{0}[{0}Pos] ^= 1 << {0}BitPos, faultTime = 1000", variableName);
string posString2 = string.Format(
"{0}Pos:int[0,{0}_size - 1], {0}BitPos:int[0,7]", variableName);
Transition locFaultTrans = new Transition(loc, loc,
Template.makeLabels("gus", "faultTime <= globalClock",
posString1,
posString2));
tem.Transitions.Add(locFaultTrans);
}
}
}
Save(path);
}
public void rewriteHeapFault(string path)
{
XElement dataFaultTemplateXML = XElement.Parse(XMLProvider.getHeapFaultTemplate());
XMLHandler xhl = new XMLHandler();
Template dataFaultTemplate = xhl.getTemplate(dataFaultTemplateXML);
dataFaultTemplate.Locations[1].Committed = true;
// todo: generalize this
globalDeclarations += "\nclock faultClock;\n";
globalDeclarations += "int bitPosHeap;\n";
globalDeclarations += "broadcast chan f;\n";
templates.Add(dataFaultTemplate);
foreach (var te in templates)
{
// ignore fault template
if(te.name.Contains("fault") || te.name.Contains("Fault"))
{
continue;
}
foreach (var l in te.Locations)
{
// if location is not a part of the original program, skip it
if (l.pc == null)
{
continue;
}
var labs = Template.makeLabels("sgu",
"heapIndex:int[0,heap_size - 1]",
"faultClock >= faultTime",
"setH(heapIndex, H(heapIndex) ^ 1 << bitPosHeap), faultTime = 1000");
Transition heapTransition = new Transition(l, l, labs);
te.Transitions.Add(heapTransition);
foreach (var l2 in te.Locations)
{
if (l.id != l2.id)
{
foreach (var edge in te.Transitions)
{
if (edge.source.id == l.id && edge.target.id == l2.id)
{
edge.grds.content += " && faultClock < faultTime";
}
}
}
}
}
}
Save(path);
}
public void rewriteInstructionFault(string path)
{
ByteCodeInstructions insts = new ByteCodeInstructions();
foreach (var tem in templates)
{
foreach (var loc in tem.Locations)
{
if(loc.pc == null)
{
continue;
}
foreach (var l2 in tem.Locations)
{
if (loc.id != l2.id)
{
foreach (var edge in tem.Transitions)
{
if (edge.source.id == loc.id && edge.target.id == l2.id)
{
edge.grds.content += " && faultAtId != " + loc.Guid;
}
}
}
}
// get instruction name and resolve to byte code instruction
int index = loc.name.IndexOf("_");
string inst = loc.name.Replace("__", "_");//.Substring(loc.name.IndexOf("_") + 1);
inst = Regex.Replace(inst, @"pc\d*_", "");
inst = inst.Replace("\n", "");
string instNotSpecial = Regex.Replace(inst, @"_\d*", "");
BytecodeInstruction bci = insts.instructionToBytecode(inst);
BytecodeInstruction bciNotSpecial = insts.instructionToBytecode(instNotSpecial);
// for handling special case in instruction, e.g. iconst_0 vs. ifeq 7
if(bciNotSpecial != null)
{
// special case, overwrite bci
bci = bciNotSpecial;
}
var tempTrans = new List<Transition>();
if(bci == null || bci.relatedInstruction.mnemonic == "") // should we use "" or null for non-valid instruction?
{
// make transition to error state if invalid instruction
var x = tem.idToLocation(Constants.errorLocId);
var labs = new List<Label>()
{
new Label()
{
content = string.Format("faultAtId == {0}", loc.Guid),
kind = "guard"
}
};
Transition errorTransition = new Transition(loc, x, labs);
tempTrans.Add(errorTransition);
}
if (bci != null && index != -1)
{
foreach (var edge in tem.Transitions)
{
// for inst fault edges
if (edge.source.id == loc.id && !edge.source.id.Contains("-") && !edge.target.id.Contains("-"))
{
var a = bci.relatedInstruction;
var labs = a.getLabels();
// add guard to distribute probability equally among fault and valid edge
Label probLbl = new Label() {content = "faultAtId == " + loc.Guid, kind = "guard", x = loc.x, y = loc.y };
labs.Add(probLbl);
int lx = 50, lx2 = 90, ly = 100;
Transition tt = new Transition(edge.source, edge.target, labs);
List<Transition.Nail> nails = new List<Transition.Nail>();
Transition.Nail nail1 = new Transition.Nail { x = loc.x - lx, y = loc.y - ly };
Transition.Nail nail2 = new Transition.Nail { x = loc.x - lx2, y = loc.y - ly };
nails.Add(nail1);
nails.Add(nail2);
tt.nails = nails;
tempTrans.Add(tt);
}
}
}
tem.Transitions.AddRange(tempTrans);
}
}
// add inst fault template
XElement instFaultTemplateXML = XElement.Parse(XMLProvider.getInstructionFaultTemplate());
XMLHandler xhl = new XMLHandler();
Template instFaultTemplate = xhl.getTemplate(instFaultTemplateXML);
instFaultTemplate.Locations[1].Committed = true;
// define number range for fault number
Label selectFaultIdLabel = new Label(){content = string.Format("i:int[0,{0}]", XMLHandler.idCount), kind = "select", x = -110, y = -127};
instFaultTemplate.Transitions[0].labels.Add(selectFaultIdLabel);
// todo: generalize this
globalDeclarations += "\nint faultAtId;\n";
templates.Add(instFaultTemplate);
Save(path);
}
public void rewritePCFault(string path)
{
foreach (var te in templates)
{
te.addFaultTransitions();
}
// is this still true??? this has to be first or locations from faultTemplate are not added
XElement faultTemplateXML = XElement.Parse(XMLProvider.getFaultTemplate());
XMLHandler xhl = new XMLHandler();
Template faultTemplate = xhl.getTemplate(faultTemplateXML);
faultTemplate.Locations[1].Committed = true;
templates.Add(faultTemplate);
Save(path);
}
