static IAsyncStateMachine GetAsyncMethodThatsAwaitingThisOne(this IAsyncStateMachine sm)
{
var task = sm.Task();
if (task == null)
{
return(null);
}
var continuationDelegates = GetDelegatesFromContinuationObject(task);
var continuationDelegate = (continuationDelegates?.Length == 1 ? continuationDelegates[0] as Action : null);
if (continuationDelegate == null)
{
return(null);
}
var stateMachine = TryGetStateMachineForDebugger(continuationDelegate).Target;
if (stateMachine is RunWithCheckpointingAwaiter)
{
continuationDelegate = (stateMachine as RunWithCheckpointingAwaiter).continuation;
stateMachine = TryGetStateMachineForDebugger(continuationDelegate).Target;
}
var builderField = stateMachine?.GetType().GetField("<>t__builder") ?? stateMachine?.GetType().GetField("$Builder");
if (builderField == null)
{
return(null);
}
return(stateMachine as IAsyncStateMachine);
}
static string Name(this IAsyncStateMachine sm)
{
var t = sm.GetType();
var s = t.Name;
s = s.Substring(1, s.LastIndexOf(">") - 1);
while (true)
{
t = t.DeclaringType;
if (t != null)
{
s = t.Name + "." + s;
}
else
{
return(s + $" [task id {sm.Task()?.Id}]");
}
}
}
