public static String GetExternalMethodDefinition(IMethodReference methodRef)
{
var methodName = BoogieMethod.From(methodRef).Name;
if (Helpers.IsCurrentlyMissing(methodRef))
{
// TODO(rcastano): Add logger. Print this as INFO or WARNING level.
Console.WriteLine("WARNING: Creating non-deterministic definition for missing method: " + methodName);
}
var parameters = Helpers.GetParametersWithBoogieType(methodRef);
var returnType = String.Empty;
if (Settings.NewAddrModelling)
{
#region Return variables in NewAddrModelling. We should only add the return variable type from CCI
if (Helpers.GetMethodBoogieReturnType(methodRef).Equals(Helpers.BoogieType.Void))
{
returnType = "returns ()";
}
else
{
var returnVariables = new List <String>();
returnVariables.Add(String.Format("$result : {0}", Helpers.GetMethodBoogieReturnType(methodRef)));
returnType = String.Format("returns ({0})", String.Join(",", returnVariables));
}
#endregion
}
else
{
#region Return variables in old memory model. We need to add 'ref' parameters as return variables (in addition to the return variable from CCI).
if (Helpers.GetMethodBoogieReturnType(methodRef).Equals(Helpers.BoogieType.Void))
{
if (methodRef.Parameters.Any(p => p.IsByReference))
{
var returnVariables = new List <String>();
returnVariables = methodRef.Parameters.Where(p => p.IsByReference).Select(p => String.Format("v{0}$out : {1}", p.Index, Helpers.GetBoogieType(p))).ToList();
returnType = String.Format("returns ({0})", String.Join(",", returnVariables));
}
}
else
{
var returnVariables = new List <String>();
returnVariables = methodRef.Parameters.Where(p => p.IsByReference).Select(p => String.Format("v{0}$out : {1}", p.Index, Helpers.GetBoogieType(p))).ToList();
returnVariables.Add(String.Format("$result : {0}", Helpers.GetMethodBoogieReturnType(methodRef)));
returnType = String.Format("returns ({0})", String.Join(",", returnVariables));
}
#endregion
}
var t = new BoogieProcedureTemplate(methodName, " {:extern} ", StatementList.Empty, StatementList.Empty, parameters, returnType, true);
return(t.TransformText());
}
public string SetProcedureStub(IMethodReference method)
{
FieldTranslator field = new FieldTranslator();
var boogieName = field.BoogieNameForField(method.ContainingType, GetFieldName(method));
var paramType = Helpers.GetBoogieType(method.Parameters.ElementAt(0));
var get = new StatementList();
get.Add(BoogieStatement.FromString(boogieName + "[obj] := " + "val;"));
var t = new BoogieProcedureTemplate(BoogieMethod.From(method).Name, "", StatementList.Empty, get, "obj : Ref, val : " + paramType, String.Empty, false);
return(t.TransformText());
}
public string GetProcedureStub(IMethodReference method)
{
FieldTranslator field = new FieldTranslator();
var boogieName = field.BoogieNameForField(method.ContainingType, GetFieldName(method));
var boogieType = Helpers.GetBoogieType(method.Type);
var get = new StatementList();
get.Add(BoogieStatement.FromString("$result := " + boogieName + "[obj];"));
var t = new BoogieProcedureTemplate(BoogieMethod.From(method).Name, "", StatementList.Empty, get, "obj : Ref", String.Format(" returns ( $result : {0})", boogieType.ToString()), false);
return(t.TransformText());
}
public String Translate()
{
// instructions must be translated before local variables
// modification to local variables can ocurr while instruction translation is done
// for example when delegate creation is detected some local variables are deleted.
var ins = TranslateInstructions(out Dictionary <string, BoogieVariable> temporalVariables);
var localVariables = TranslateLocalVariables(temporalVariables);
var methodName = BoogieMethod.From(methodDefinition).Name;
var attr = TranslateAttr();
var parametersWithTypes = Helpers.GetParametersWithBoogieType(methodDefinition);
var returnTypeIfAny = TranslateReturnTypeIfAny();
var boogieProcedureTemplate = new BoogieProcedureTemplate(methodName, attr, localVariables, ins, parametersWithTypes, returnTypeIfAny, Helpers.IsExternal(methodDefinition));
return(boogieProcedureTemplate.TransformText());
}
public string AsyncMethodBuilderStartStub(bool genericVersion)
{
StatementList localVars = new StatementList();
StatementList instructions = new StatementList();
var param0 = new BoogieVariable(Helpers.BoogieType.Addr, "param0");
var moveNextMethods = stateMachinesTypes.Select(t => t.Members.Where(m => m.Name.Value.Contains("MoveNext")).First()).Cast <IMethodDefinition>();
var ifCases = moveNextMethods.Select(m => Invoke(m, param0));
foreach (var ifCase in ifCases)
{
instructions.Add(ifCase);
}
string procedureName = genericVersion ? "System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.Start``1$``0$" : "System.Runtime.CompilerServices.AsyncTaskMethodBuilder.Start``1$``0$";
var procedureTemplate = new BoogieProcedureTemplate(procedureName, "", localVars, instructions, "this : Ref,param0: Addr", String.Empty, false);
return(procedureTemplate.TransformText());
}
public string AsyncStubsScheduleTask(bool genericVersion = false)
{
StatementList localVars = new StatementList();
localVars.Add(BoogieStatement.FromString("var state : bool;"));
StatementList instructions = new StatementList();
var param0 = new BoogieVariable(Helpers.BoogieType.Object, "sm");
var procIsCompleted = genericVersion ? BoogieMethod.AsyncStubsTaskAwaiterIsCompletedGeneric : BoogieMethod.AsyncStubsTaskAwaiterIsCompleted;
var awaiterVar = new BoogieVariable(Helpers.BoogieType.Object, "awaiter");
var stateVar = new BoogieVariable(Helpers.BoogieType.Bool, "state");
var argsList = new List <Expression>();
argsList.Add(awaiterVar);
var resList = new List <BoogieVariable>();
resList.Add(stateVar);
var callIsCompleted = BoogieStatement.ProcedureCall(procIsCompleted, argsList, resList, stateVar);
var assume = BoogieStatement.Assume(Expression.BinaryOperationExpression(stateVar, new Expression(Helpers.BoogieType.Bool, "true"), Backend.ThreeAddressCode.Instructions.BinaryOperation.Eq));
var yield = BoogieStatement.FromString("yield;");
// it is crucial to yield before anything else
instructions.Add(yield);
instructions.Add(callIsCompleted);
instructions.Add(assume);
var moveNextMethods = stateMachinesTypes.Select(t => t.Members.Where(m => m.Name.Value.Contains("MoveNext")).First()).Cast <IMethodDefinition>();
var ifCases = moveNextMethods.Select(m => Invoke(m, param0));
foreach (var ifCase in ifCases)
{
instructions.Add(ifCase);
}
string procedureName = genericVersion ? "$AsyncStubs`1$ScheduleTask" : "$AsyncStubs$ScheduleTask";
var procedureTemplate = new BoogieProcedureTemplate(procedureName, "", localVars, instructions, "awaiter : Object, sm : Object", String.Empty, false);
return(procedureTemplate.TransformText());
}
