/// <summary>
/// Gets WCT information for the specified thread.
/// </summary>
public ThreadWCTInfo GetBlockingObjects(uint osThreadId)
{
IntPtr wctSession = IntPtr.Zero;
try
{
wctSession = OpenThreadWaitChainSession((int)WCT_SESSION_OPEN_FLAGS.WCT_SYNC_OPEN_FLAG, 0);
if (wctSession == IntPtr.Zero)
return null;
WAITCHAIN_NODE_INFO[] nodes = new WAITCHAIN_NODE_INFO[WCT_MAX_NODE_COUNT];
int isCycle = 0;
int count = nodes.Length;
if (GetThreadWaitChain(wctSession, IntPtr.Zero, WCTP_GETINFO_ALL_FLAGS,
osThreadId, ref count, nodes, out isCycle))
{
return new ThreadWCTInfo(isCycle == 1, osThreadId, nodes.Take(count).ToArray());
}
}
finally
{
if (wctSession != IntPtr.Zero)
CloseThreadWaitChainSession(wctSession);
}
return null;
}
/// <summary>
/// Gets WCT information for the specified thread.
/// </summary>
public ThreadWCTInfo GetBlockingObjects(uint osThreadId)
{
IntPtr wctSession = IntPtr.Zero;
try
{
wctSession = OpenThreadWaitChainSession((int)WCT_SESSION_OPEN_FLAGS.WCT_SYNC_OPEN_FLAG, 0);
if (wctSession == IntPtr.Zero)
{
return(null);
}
WAITCHAIN_NODE_INFO[] nodes = new WAITCHAIN_NODE_INFO[WCT_MAX_NODE_COUNT];
int isCycle = 0;
int count = nodes.Length;
if (GetThreadWaitChain(wctSession, IntPtr.Zero, WCTP_GETINFO_ALL_FLAGS,
osThreadId, ref count, nodes, out isCycle))
{
return(new ThreadWCTInfo(isCycle == 1, osThreadId, nodes.Take(count).ToArray()));
}
}
finally
{
if (wctSession != IntPtr.Zero)
{
CloseThreadWaitChainSession(wctSession);
}
}
return(null);
}
public void ThreadWaitChainSessionTest()
{
RegisterWaitChainCOMCallback();
using (new ElevPriv("SeDebugPrivilege"))
using (var hWct = OpenThreadWaitChainSession(WaitChainSessionType.WCT_SYNC_OPEN_FLAG))
{
Assert.That(hWct, ResultIs.ValidHandle);
var nodes = new WAITCHAIN_NODE_INFO[WCT_MAX_NODE_COUNT];
uint nodeCnt = (uint)nodes.Length;
Assert.That(GetThreadWaitChain(hWct, default, WaitChainRetrievalOptions.WCTP_GETINFO_ALL_FLAGS, Kernel32.GetCurrentThreadId(),
public WaitChainInfoObject(WAITCHAIN_NODE_INFO item)
{
ObjectStatus = item.ObjectStatus;
ObjectType = item.ObjectType;
TimeOut = item.Union.LockObject.Timeout;
Alertable = item.Union.LockObject.Alertable;
if (item.ObjectType == WCT_OBJECT_TYPE.WctThreadType)
{
OSThreadId = item.Union.ThreadObject.ThreadId;
OSProcessId = item.Union.ThreadObject.ProcessId;
ContextSwitches = item.Union.ThreadObject.ContextSwitches;
WaitTime = item.Union.ThreadObject.WaitTime;
}
else
{
unsafe
{
ObjectName = Marshal.PtrToStringUni((IntPtr)item.Union.LockObject.ObjectName);
}
}
}
public WaitChainInfoObject(WAITCHAIN_NODE_INFO item)
{
ObjectStatus = item.ObjectStatus;
ObjectType = item.ObjectType;
TimeOut = item.Union.LockObject.Timeout;
Alertable = item.Union.LockObject.Alertable;
if (item.ObjectType == WCT_OBJECT_TYPE.WctThreadType)
{
OSThreadId = item.Union.ThreadObject.ThreadId;
OSProcessId = item.Union.ThreadObject.ProcessId;
ContextSwitches = item.Union.ThreadObject.ContextSwitches;
WaitTime = item.Union.ThreadObject.WaitTime;
}
else
{
unsafe
{
ObjectName = Marshal.PtrToStringUni((IntPtr)item.Union.LockObject.ObjectName);
}
}
}
public static bool GetThreadWaitChain(SafeWaitChainHandle chainHandle, int threadId, ref int NodeCount, WAITCHAIN_NODE_INFO[] NodeInfoArray, out int IsCycle)
{
return RealGetThreadWaitChain(chainHandle, IntPtr.Zero, WCT_FLAGS.All, threadId, ref NodeCount, NodeInfoArray, out IsCycle);
}
public ThreadWCTInfo(bool isDeadLock, uint threadId, WAITCHAIN_NODE_INFO[] info)
{
IsDeadlocked = isDeadLock;
OSThreadId = threadId;
WaitChain.AddRange(info.Select(i => new WaitChainInfoObject(i)));
}
