private void DoTest(MethodDefinition method, params string [] userNames)
{
int count = 0;
foreach (Instruction ins in method.Body.Instructions)
{
VariableDefinition v = ins.GetVariable(method);
if (v != null)
{
bool userName = userNames.Any(n => n == v.ToString());
if (userName)
{
Assert.IsFalse(v.IsGeneratedName(method.DebugInformation), "{0} was reported as a generated name", v.ToString());
}
else
{
++count;
Assert.IsTrue(v.IsGeneratedName(method.DebugInformation), "{0} was not reported as a generated name", v.ToString());
}
}
}
if (count == 0)
{
Assert.Fail("Didn't find any generated locals for VariableDefinitionRocksTest::{0}", method.Name);
}
}
public RuleResult CheckMethod(MethodDefinition method)
{
// rule does not apply to external methods (e.g. p/invokes)
// and generated code (by compilers or tools)
if (!method.HasBody || method.IsGeneratedCode())
{
return(RuleResult.DoesNotApply);
}
MethodBody body = method.Body;
if (!body.HasVariables)
{
return(RuleResult.Success);
}
var variables = body.Variables;
int count = variables.Count;
if (used == null)
{
used = new BitArray(Math.Max(DefaultLength, count));
}
else if (count > used.Length)
{
used = new BitArray(count);
}
used.SetAll(false);
foreach (Instruction ins in body.Instructions)
{
VariableDefinition vd = ins.GetVariable(method);
if (vd != null)
{
used [vd.Index] = true;
}
}
for (int i = 0; i < count; i++)
{
if (!used [i])
{
// sometimes the compilers generates some locals without really
// using them (e.g. assign only a constant). In this case we need
// to determine if the variable is "genuine" or a compiler
// (*) seen in a while (true) loop over a switch
VariableDefinition variable = variables [i];
if (variable.IsGeneratedName())
{
continue;
}
string s = String.Format(CultureInfo.InvariantCulture, "Variable '{0}' of type '{1}'",
variable.Name, variable.VariableType.GetFullName());
Runner.Report(method, Severity.Low, Confidence.Normal, s);
}
}
return(Runner.CurrentRuleResult);
}
private string Mutates(MethodDefinition method, Instruction end)
{
string name = null;
Instruction ins = AvoidMethodsWithSideEffectsInConditionalCodeRule.FullTraceBack(method, end);
if (ins != null)
{
Log.WriteLine(this, "checking args for call at {0:X4} starting at {1:X4}", end.Offset, ins.Offset);
while (ins.Offset < end.Offset && name == null)
{
if (ins.IsStoreArgument())
{
ParameterDefinition pd = ins.Operand as ParameterDefinition;
name = "argument " + pd.Name;
}
else if (ins.IsStoreLocal())
{
VariableDefinition vd = ins.GetVariable(method);
if (!vd.IsGeneratedName())
{
string variableName = String.Empty; // vd.Name is not valid since Cecil 0.10
name = "local " + variableName;
}
}
else if (ins.OpCode.Code == Code.Stfld || ins.OpCode.Code == Code.Stsfld)
{
FieldReference fr = ins.Operand as FieldReference;
if (!fr.IsGeneratedCode())
{
name = "field " + fr.Name;
}
}
ins = ins.Next;
}
}
return(name);
}
