private static string KindString(this BlockingReason kind)
{
switch (kind)
{
case BlockingReason.None:
return "None";
case BlockingReason.Unknown:
return "Unknown";
case BlockingReason.Monitor:
return "Monitor";
case BlockingReason.MonitorWait:
return "MonitorWait";
case BlockingReason.WaitOne:
return "WaitOne";
case BlockingReason.WaitAll:
return "WaitAll";
case BlockingReason.WaitAny:
return "WaitAny";
case BlockingReason.ThreadJoin:
return "ThreadJoin";
case BlockingReason.ReaderAcquired:
return "ReaderAcquired";
case BlockingReason.WriterAcquired:
return "WriterAcquired";
default:
return "Unknown";
}
}
public DesktopBlockingObject(ulong obj, bool locked, int recursion, BlockingReason reason)
{
Object = obj;
_locked = locked;
RecursionCount = recursion;
_reason = reason;
}
public DesktopBlockingObject(ulong obj, bool locked, int recursion, BlockingReason reason, ClrThread[] owners)
{
Object = obj;
_locked = locked;
RecursionCount = recursion;
_reason = reason;
_owners = owners;
}
public DesktopBlockingObject(ulong obj, bool locked, int recursion, ClrThread owner, BlockingReason reason)
{
Object = obj;
_locked = locked;
RecursionCount = recursion;
_reason = reason;
_owners = new ClrThread[1];
_owners[0] = owner;
}
private ClrtBlkObject(ulong address, bool taken, BlockingReason blkReason, int recursionCnt, int typeId, int blockInfoNdx)
{
_address = address;
_recursionCnt = recursionCnt;
_blkReason = blkReason;
_taken = taken;
_index = blockInfoNdx;
_typeId = typeId;
}
/// <summary>
/// Create instance of our version BlockingObject.
/// </summary>
/// <param name="bo">Instance of BlockingObject from ClrHeap.</param>
/// <param name="blockInfoNdx">Index of the owners,waiters information.</param>
/// <param name="typeId">Type of this object.</param>
public ClrtBlkObject(BlockingObject bo, int blockInfoNdx, int typeId)
{
_address = bo.Object;
_recursionCnt = bo.RecursionCount;
_blkReason = bo.Reason;
_taken = bo.Taken;
_index = blockInfoNdx;
_typeId = typeId;
}
public static ClrtBlkObject Load(BinaryReader bw)
{
ulong addr = bw.ReadUInt64();
int recursionCnt = bw.ReadInt32();
BlockingReason blkReason = (BlockingReason)bw.ReadInt32();
int blockInfoNdx = bw.ReadInt32();
int typeId = bw.ReadInt32();
bool taken = bw.ReadBoolean();
return(new ClrtBlkObject(addr, taken, blkReason, recursionCnt, typeId, blockInfoNdx));
}
private void SetThreadWaiters()
{
HashSet <string> eventTypes = null;
List <BlockingObject> blobjs = new List <BlockingObject>();
foreach (DesktopThread thread in _runtime.Threads)
{
int max = thread.StackTrace.Count;
if (max > 10)
{
max = 10;
}
blobjs.Clear();
for (int i = 0; i < max; ++i)
{
DesktopBlockingObject blockingObj = null;
ClrMethod method = thread.StackTrace[i].Method;
if (method == null)
{
continue;
}
ClrType type = method.Type;
if (type == null)
{
continue;
}
switch (method.Name)
{
case "AcquireWriterLockInternal":
case "FCallUpgradeToWriterLock":
case "UpgradeToWriterLock":
case "AcquireReaderLockInternal":
case "AcquireReaderLock":
if (type.Name == "System.Threading.ReaderWriterLock")
{
blockingObj = FindLocks(thread.StackLimit, thread.StackTrace[i].StackPointer, IsReaderWriterLock);
if (blockingObj == null)
{
blockingObj = FindLocks(thread.StackTrace[i].StackPointer, thread.StackBase, IsReaderWriterLock);
}
if (blockingObj != null && (blockingObj.Reason == BlockingReason.Unknown || blockingObj.Reason == BlockingReason.None))
{
// This should have already been set correctly when the BlockingObject was created. This is just a best-guess.
if (method.Name == "AcquireReaderLockInternal" || method.Name == "AcquireReaderLock")
{
blockingObj.Reason = BlockingReason.WriterAcquired;
}
else
{
blockingObj.Reason = BlockingReason.ReaderAcquired;
}
}
}
break;
case "TryEnterReadLockCore":
case "TryEnterReadLock":
case "TryEnterUpgradeableReadLock":
case "TryEnterUpgradeableReadLockCore":
case "TryEnterWriteLock":
case "TryEnterWriteLockCore":
if (type.Name == "System.Threading.ReaderWriterLockSlim")
{
blockingObj = FindLocks(thread.StackLimit, thread.StackTrace[i].StackPointer, IsReaderWriterSlim);
if (blockingObj == null)
{
blockingObj = FindLocks(thread.StackTrace[i].StackPointer, thread.StackBase, IsReaderWriterSlim);
}
if (blockingObj != null && (blockingObj.Reason == BlockingReason.Unknown || blockingObj.Reason == BlockingReason.None))
{
// This should have already been set correctly when the BlockingObject was created. This is just a best-guess.
if (method.Name == "TryEnterWriteLock" || method.Name == "TryEnterWriteLockCore")
{
blockingObj.Reason = BlockingReason.ReaderAcquired;
}
else
{
blockingObj.Reason = BlockingReason.WriterAcquired;
}
}
}
break;
case "JoinInternal":
case "Join":
if (type.Name == "System.Threading.Thread")
{
if (FindThread(thread.StackLimit, thread.StackTrace[i].StackPointer, out ulong threadAddr, out ClrThread target) ||
FindThread(thread.StackTrace[i].StackPointer, thread.StackBase, out threadAddr, out target))
{
if (!_joinLocks.TryGetValue(target, out blockingObj))
{
_joinLocks[target] = blockingObj = new DesktopBlockingObject(threadAddr, true, 0, target, BlockingReason.ThreadJoin);
}
}
}
break;
case "Wait":
case "ObjWait":
if (type.Name == "System.Threading.Monitor")
{
blockingObj = FindMonitor(thread.StackLimit, thread.StackTrace[i].StackPointer);
if (blockingObj == null)
{
blockingObj = FindMonitor(thread.StackTrace[i].StackPointer, thread.StackBase);
}
blockingObj.Reason = BlockingReason.MonitorWait;
}
break;
case "WaitAny":
case "WaitAll":
if (type.Name == "System.Threading.WaitHandle")
{
ulong obj = FindWaitObjects(thread.StackLimit, thread.StackTrace[i].StackPointer, "System.Threading.WaitHandle[]");
if (obj == 0)
{
obj = FindWaitObjects(thread.StackTrace[i].StackPointer, thread.StackBase, "System.Threading.WaitHandle[]");
}
if (obj != 0)
{
BlockingReason reason = method.Name == "WaitAny" ? BlockingReason.WaitAny : BlockingReason.WaitAll;
if (!_waitLocks.TryGetValue(obj, out blockingObj))
{
_waitLocks[obj] = blockingObj = new DesktopBlockingObject(obj, true, 0, null, reason);
}
}
}
break;
case "WaitOne":
case "InternalWaitOne":
case "WaitOneNative":
if (type.Name == "System.Threading.WaitHandle")
{
if (eventTypes == null)
{
eventTypes = new HashSet <string>
{
"System.Threading.Mutex",
"System.Threading.Semaphore",
"System.Threading.ManualResetEvent",
"System.Threading.AutoResetEvent",
"System.Threading.WaitHandle",
"Microsoft.Win32.SafeHandles.SafeWaitHandle"
};
}
ulong obj = FindWaitHandle(thread.StackLimit, thread.StackTrace[i].StackPointer, eventTypes);
if (obj == 0)
{
obj = FindWaitHandle(thread.StackTrace[i].StackPointer, thread.StackBase, eventTypes);
}
if (obj != 0)
{
if (_waitLocks == null)
{
_waitLocks = new Dictionary <ulong, DesktopBlockingObject>();
}
if (!_waitLocks.TryGetValue(obj, out blockingObj))
{
_waitLocks[obj] = blockingObj = new DesktopBlockingObject(obj, true, 0, null, BlockingReason.WaitOne);
}
}
}
break;
case "TryEnter":
case "ReliableEnterTimeout":
case "TryEnterTimeout":
case "ReliableEnter":
case "Enter":
if (type.Name == "System.Threading.Monitor")
{
blockingObj = FindMonitor(thread.StackLimit, thread.StackTrace[i].StackPointer);
if (blockingObj != null)
{
blockingObj.Reason = BlockingReason.Monitor;
}
}
break;
}
if (blockingObj != null)
{
bool alreadyEncountered = false;
foreach (var blobj in blobjs)
{
if (blobj.Object == blockingObj.Object)
{
alreadyEncountered = true;
break;
}
}
if (!alreadyEncountered)
{
blobjs.Add(blockingObj);
}
}
}
foreach (DesktopBlockingObject blobj in blobjs)
{
blobj.AddWaiter(thread);
}
thread.SetBlockingObjects(blobjs.ToArray());
}
}
