private ThreadPoolItem GetThreadPoolItem(ClrObject item)
{
ClrType itemType = item.Type;
if (itemType.Name == "System.Threading.Tasks.Task")
{
return(GetTask(item));
}
if (
(string.CompareOrdinal(itemType.Name, "System.Threading.QueueUserWorkItemCallback") == 0) ||
// new to .NET Core
(string.CompareOrdinal(itemType.Name, "System.Threading.QueueUserWorkItemCallbackDefaultContext") == 0)
)
{
return(GetQueueUserWorkItemCallback(item));
}
// create a raw information
ThreadPoolItem tpi = new ThreadPoolItem()
{
Type = ThreadRoot.Raw,
Address = item.Address,
MethodName = itemType.Name
};
return(tpi);
}
private ThreadPoolItem GetQueueUserWorkItemCallback(ClrObject element)
{
ThreadPoolItem tpi = new ThreadPoolItem()
{
Address = (ulong)element,
Type = ThreadRoot.WorkItem
};
// look for the callback given to ThreadPool.QueueUserWorkItem()
// for .NET Core, the callback is stored in a different field _callback
var elementType = element.Type;
ClrObject callback;
if (elementType.GetFieldByName("_callback") != null)
{
callback = element.ReadObjectField("_callback");
}
else if (elementType.GetFieldByName("callback") != null)
{
callback = element.ReadObjectField("callback");
}
else
{
tpi.MethodName = "[no callback]";
return(tpi);
}
var target = callback.ReadObjectField("_target");
if (!target.IsValid)
{
tpi.MethodName = "[no callback target]";
return(tpi);
}
ClrType targetType = target.Type;
if (targetType == null)
{
tpi.MethodName = $" [target=0x{target.Address}]";
}
else
{
// look for method name
tpi.MethodName = BuildDelegateMethodName(targetType, callback);
}
return(tpi);
}
private void DisplayItem(ThreadPoolItem item, Dictionary <string, WorkInfo> tasks, ref int taskCount, Dictionary <string, WorkInfo> workItems, ref int workItemCount)
{
switch (item.Type)
{
case ThreadRoot.Task:
WriteLine($"0x{item.Address:X16} Task | {item.MethodName}");
UpdateStats(tasks, item.MethodName, ref taskCount);
break;
case ThreadRoot.WorkItem:
WriteLine($"0x{item.Address:X16} Work | {item.MethodName}");
UpdateStats(workItems, item.MethodName, ref workItemCount);
break;
default:
WriteLine($"0x{item.Address:X16} {item.MethodName}");
break;
}
}
private ThreadPoolItem GetTask(ClrObject task)
{
ThreadPoolItem tpi = new ThreadPoolItem()
{
Address = task.Address,
Type = ThreadRoot.Task
};
// look for the context in m_action._target
var action = task.ReadObjectField("m_action");
if (!action.IsValid)
{
tpi.MethodName = " [no action]";
return(tpi);
}
var target = action.ReadObjectField("_target");
if (!target.IsValid)
{
tpi.MethodName = " [no target]";
return(tpi);
}
tpi.MethodName = BuildDelegateMethodName(target.Type, action);
// get the task scheduler if any
var taskScheduler = task.ReadObjectField("m_taskScheduler");
if (taskScheduler.IsValid)
{
var schedulerType = taskScheduler.Type.ToString();
if (string.CompareOrdinal("System.Threading.Tasks.ThreadPoolTaskScheduler", schedulerType) != 0)
{
tpi.MethodName = $"{tpi.MethodName} [{schedulerType}]";
}
}
return(tpi);
}