/// <summary>
/// Analyzes the ownership of the given-up symbol
/// in the gives-up operation.
/// </summary>
/// <param name="givenUpSymbol">GivenUpOwnershipSymbol</param>
/// <param name="call">Gives-up call</param>
/// <param name="statement">Statement</param>
/// <param name="machine">StateMachine</param>
/// <param name="model">SemanticModel</param>
/// <param name="trace">TraceInfo</param>
protected override void AnalyzeOwnershipInGivesUpCall(GivenUpOwnershipSymbol givenUpSymbol,
InvocationExpressionSyntax call, Statement statement, StateMachine machine,
SemanticModel model, TraceInfo trace)
{
if (statement.Equals(givenUpSymbol.Statement) &&
!statement.ControlFlowNode.IsSuccessorOf(
givenUpSymbol.Statement.ControlFlowNode))
{
return;
}
var opSymbol = model.GetSymbolInfo(call).Symbol;
if ((!opSymbol.Name.Equals("Send") &&
!opSymbol.Name.Equals("CreateMachine")) ||
(opSymbol.Name.Equals("CreateMachine") &&
call.ArgumentList.Arguments.Count != 2))
{
return;
}
ExpressionSyntax argExpr = call.ArgumentList.Arguments[1].Expression;
var arguments = new List<ExpressionSyntax>();
if (argExpr is ObjectCreationExpressionSyntax)
{
var objCreation = argExpr as ObjectCreationExpressionSyntax;
foreach (var arg in objCreation.ArgumentList.Arguments)
{
arguments.Add(arg.Expression);
}
}
else if (argExpr is BinaryExpressionSyntax &&
argExpr.IsKind(SyntaxKind.AsExpression))
{
var binExpr = argExpr as BinaryExpressionSyntax;
if (binExpr.Left is IdentifierNameSyntax ||
binExpr.Left is MemberAccessExpressionSyntax)
{
arguments.Add(binExpr.Left);
}
else if (binExpr.Left is InvocationExpressionSyntax)
{
var invocation = binExpr.Left as InvocationExpressionSyntax;
for (int i = 1; i < invocation.ArgumentList.Arguments.Count; i++)
{
arguments.Add(invocation.ArgumentList.Arguments[i].Expression);
}
}
}
else if (argExpr is IdentifierNameSyntax ||
argExpr is MemberAccessExpressionSyntax)
{
arguments.Add(argExpr);
}
var extractedArgs = base.ExtractArguments(arguments);
foreach (var arg in extractedArgs)
{
IdentifierNameSyntax argIdentifier = base.AnalysisContext.GetRootIdentifier(arg);
ITypeSymbol argType = model.GetTypeInfo(argIdentifier).Type;
if (base.AnalysisContext.IsTypePassedByValueOrImmutable(argType))
{
continue;
}
ISymbol argSymbol = model.GetSymbolInfo(argIdentifier).Symbol;
if (statement.Summary.DataFlowAnalysis.FlowsIntoSymbol(argSymbol,
givenUpSymbol.ContainingSymbol, statement, givenUpSymbol.Statement))
{
AnalysisErrorReporter.ReportGivenUpOwnershipSending(trace, argSymbol);
return;
}
}
}
/// <summary>
/// Analyzes the ownership of the given-up symbol
/// in the candidate callee.
/// </summary>
/// <param name="givenUpSymbol">GivenUpOwnershipSymbol</param>
/// <param name="calleeSummary">MethodSummary</param>
/// <param name="call">ExpressionSyntax</param>
/// <param name="statement">Statement</param>
/// <param name="machine">StateMachine</param>
/// <param name="model">SemanticModel</param>
/// <param name="trace">TraceInfo</param>
protected override void AnalyzeOwnershipInCandidateCallee(GivenUpOwnershipSymbol givenUpSymbol,
MethodSummary calleeSummary, ExpressionSyntax call, Statement statement,
StateMachine machine, SemanticModel model, TraceInfo trace)
{
if (statement.Equals(givenUpSymbol.Statement) &&
!statement.ControlFlowNode.IsSuccessorOf(
givenUpSymbol.Statement.ControlFlowNode))
{
return;
}
var invocation = call as InvocationExpressionSyntax;
if (invocation != null)
{
this.AnalyzeOwnershipInExpression(givenUpSymbol, invocation.Expression, statement,
machine, model, trace);
}
ArgumentListSyntax argumentList = base.AnalysisContext.GetArgumentList(call);
if (argumentList != null)
{
for (int idx = 0; idx < argumentList.Arguments.Count; idx++)
{
var argType = model.GetTypeInfo(argumentList.Arguments[idx].Expression).Type;
if (base.AnalysisContext.IsTypePassedByValueOrImmutable(argType))
{
continue;
}
var argIdentifier = base.AnalysisContext.GetRootIdentifier(
argumentList.Arguments[idx].Expression);
ISymbol argSymbol = model.GetSymbolInfo(argIdentifier).Symbol;
if (statement.Summary.DataFlowAnalysis.FlowsIntoSymbol(argSymbol,
givenUpSymbol.ContainingSymbol, statement, givenUpSymbol.Statement))
{
if (calleeSummary.SideEffectsInfo.ParameterAccesses.ContainsKey(idx))
{
foreach (var access in calleeSummary.SideEffectsInfo.ParameterAccesses[idx])
{
TraceInfo newTrace = new TraceInfo();
newTrace.Merge(trace);
newTrace.AddErrorTrace(access.SyntaxNode);
AnalysisErrorReporter.ReportGivenUpOwnershipAccess(newTrace);
}
}
var fieldSymbols = calleeSummary.SideEffectsInfo.FieldFlowParamIndexes.Where(
v => v.Value.Contains(idx)).Select(v => v.Key);
foreach (var fieldSymbol in fieldSymbols)
{
if (base.IsFieldAccessedInSuccessor(fieldSymbol, statement.Summary, machine))
{
AnalysisErrorReporter.ReportGivenUpOwnershipFieldAssignment(trace, fieldSymbol);
}
}
if (calleeSummary.SideEffectsInfo.GivesUpOwnershipParamIndexes.Contains(idx))
{
AnalysisErrorReporter.ReportGivenUpOwnershipSending(trace, argSymbol);
}
}
}
}
foreach (var fieldAccess in calleeSummary.SideEffectsInfo.FieldAccesses)
{
foreach (var access in fieldAccess.Value)
{
if (statement.Summary.DataFlowAnalysis.FlowsIntoSymbol(givenUpSymbol.ContainingSymbol,
fieldAccess.Key, givenUpSymbol.Statement, statement))
{
TraceInfo newTrace = new TraceInfo();
newTrace.Merge(trace);
newTrace.AddErrorTrace(access.SyntaxNode);
AnalysisErrorReporter.ReportGivenUpOwnershipFieldAccess(newTrace, fieldAccess.Key);
}
}
}
}
