/// <summary>
/// Analyzes the ownership of the given-up symbol in the candidate callee.
/// </summary>
protected override void AnalyzeOwnershipInCandidateCallee(GivenUpOwnershipSymbol givenUpSymbol, MethodSummary calleeSummary,
ExpressionSyntax call, Statement statement, StateMachine machine, SemanticModel model, TraceInfo trace)
{
ArgumentListSyntax argumentList = AnalysisContext.GetArgumentList(call);
if (argumentList is null)
{
return;
}
for (int idx = 0; idx < argumentList.Arguments.Count; idx++)
{
var argIdentifier = AnalysisContext.GetRootIdentifier(argumentList.Arguments[idx].Expression);
if (argIdentifier is null)
{
continue;
}
ISymbol argSymbol = model.GetSymbolInfo(argIdentifier).Symbol;
if (statement.Summary.DataFlowAnalysis.FlowsIntoSymbol(argSymbol, givenUpSymbol.ContainingSymbol, statement, givenUpSymbol.Statement))
{
if (calleeSummary.SideEffectsInfo.FieldFlowParamIndexes.Any(v => v.Value.Contains(idx) &&
this.IsFieldAccessedInSuccessor(v.Key, statement.Summary, machine)))
{
this.ErrorReporter.ReportGivenUpFieldOwnershipError(trace, argSymbol);
}
}
}
}
/// <summary>
/// Analyzes the ownership of the given-up symbol in the candidate callee.
/// </summary>
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;
}
if (call is InvocationExpressionSyntax invocation)
{
this.AnalyzeOwnershipInExpression(givenUpSymbol, invocation.Expression, statement, model, trace);
}
ArgumentListSyntax argumentList = 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 (this.AnalysisContext.IsTypePassedByValueOrImmutable(argType))
{
continue;
}
var argIdentifier = 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);
this.ErrorReporter.ReportGivenUpOwnershipAccess(newTrace);
}
}
var fieldSymbols = calleeSummary.SideEffectsInfo.FieldFlowParamIndexes.Where(
v => v.Value.Contains(idx)).Select(v => v.Key);
foreach (var fieldSymbol in fieldSymbols)
{
if (this.IsFieldAccessedInSuccessor(fieldSymbol, statement.Summary, machine))
{
this.ErrorReporter.ReportGivenUpOwnershipFieldAssignment(trace, fieldSymbol);
}
}
if (calleeSummary.SideEffectsInfo.GivesUpOwnershipParamIndexes.Contains(idx))
{
this.ErrorReporter.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);
this.ErrorReporter.ReportGivenUpOwnershipFieldAccess(newTrace, fieldAccess.Key);
}
}
}
}
