// pack the argv data and emit the event using TraceEvent
internal unsafe override uint EventWrite(EventTrace.Event eventID, EventTrace.Keyword keywords, EventTrace.Level level, int argc, EventData *argv)
{
ClassicEtw.EVENT_HEADER header;
header.Header.ClientContext = 0;
header.Header.Flags = ClassicEtw.WNODE_FLAG_TRACED_GUID | ClassicEtw.WNODE_FLAG_USE_MOF_PTR;
header.Header.Guid = EventTrace.GetGuidForEvent(eventID);
header.Header.Level = (byte)level;
header.Header.Type = (byte)EventTrace.GetOpcodeForEvent(eventID);
header.Header.Version = (ushort)EventTrace.GetVersionForEvent(eventID);
// Extra copy on XP to move argv to the end of the EVENT_HEADER
EventData *eventData = &header.Data;
if (argc > ClassicEtw.MAX_MOF_FIELDS)
{
// Data will be lost on XP
argc = ClassicEtw.MAX_MOF_FIELDS;
}
header.Header.Size = (ushort)(argc * sizeof(EventData) + 48);
for (int x = 0; x < argc; x++)
{
eventData[x].Ptr = argv[x].Ptr;
eventData[x].Size = argv[x].Size;
}
return(ClassicEtw.TraceEvent(_traceHandle, &header));
}
internal bool IsEnabled(EventTrace.Keyword keyword, EventTrace.Level level)
{
return(_enabled &&
(level <= _level) &&
(keyword & _keywords) != 0 &&
(keyword & _matchAllKeyword) == _matchAllKeyword);
}
internal unsafe override uint EventWrite(EventTrace.Event eventID, EventTrace.Keyword keywords, EventTrace.Level level, int argc, EventData *argv)
{
ManifestEtw.EventDescriptor eventDescriptor;
eventDescriptor.Id = (ushort)eventID;
eventDescriptor.Version = EventTrace.GetVersionForEvent(eventID);
eventDescriptor.Channel = 0x10; // Since Channel isn't supported on XP we only use a single default channel.
eventDescriptor.Level = (byte)level;
eventDescriptor.Opcode = EventTrace.GetOpcodeForEvent(eventID);
eventDescriptor.Task = EventTrace.GetTaskForEvent(eventID);
eventDescriptor.Keywords = (long)keywords;
if (argc == 0)
{
argv = null;
}
return(ManifestEtw.EventWrite(_registrationHandle.Value, ref eventDescriptor, (uint)argc, argv));
}
// Optimization for 0-1 arguments
internal unsafe uint TraceEvent(EventTrace.Event eventID, EventTrace.Keyword keywords, EventTrace.Level level, object eventData)
{
// It is the responsibility of the caller to check that flags/keywords are enabled before calling this method
Debug.Assert(IsEnabled(keywords, level));
uint status = 0;
int argCount = 0;
EventData userData;
userData.Size = 0;
string dataString = null;
byte * dataBuffer = stackalloc byte[s_basicTypeAllocationBufferSize];
if (eventData != null)
{
dataString = EncodeObject(ref eventData, &userData, dataBuffer);
argCount = 1;
}
if (userData.Size > s_traceEventMaximumSize)
{
return(ErrorEventTooBig);
}
if (dataString != null)
{
fixed(char *pdata = dataString)
{
userData.Ptr = (ulong)pdata;
status = EventWrite(eventID, keywords, level, argCount, &userData);
}
}
else
{
status = EventWrite(eventID, keywords, level, argCount, &userData);
}
return(status);
}
/// <summary>
/// Tells ContextLayoutManager to finalize possibly async update.
/// Used before accessing services off Visual.
/// </summary>
//[CodeAnalysis("AptcaMethodsShouldOnlyCallAptcaMethods")] //Tracking
internal void UpdateLayout()
{
VerifyAccess();
//make UpdateLayout to be a NOP if called during UpdateLayout.
if (_isInUpdateLayout ||
_measuresOnStack > 0 ||
_arrangesOnStack > 0 ||
_isDead)
{
return;
}
#if DEBUG_CLR_MEM
bool clrTracingEnabled = false;
// Start over with the Measure and arrange counters for this layout pass
int measureCLRPass = 0;
int arrangeCLRPass = 0;
if (CLRProfilerControl.ProcessIsUnderCLRProfiler)
{
clrTracingEnabled = true;
if (CLRProfilerControl.CLRLoggingLevel >= CLRProfilerControl.CLRLogState.Performance)
{
++_layoutCLRPass;
CLRProfilerControl.CLRLogWriteLine("Begin_Layout_{0}", _layoutCLRPass);
}
}
#endif // DEBUG_CLR_MEM
bool etwTracingEnabled = false;
long perfElementID = 0;
const EventTrace.Keyword etwKeywords = EventTrace.Keyword.KeywordLayout | EventTrace.Keyword.KeywordPerf;
if (!_isUpdating && EventTrace.IsEnabled(etwKeywords, EventTrace.Level.Info))
{
etwTracingEnabled = true;
perfElementID = PerfService.GetPerfElementID(this);
EventTrace.EventProvider.TraceEvent(EventTrace.Event.WClientLayoutBegin, etwKeywords, EventTrace.Level.Info,
perfElementID, EventTrace.LayoutSource.LayoutManager);
}
int cnt = 0;
bool gotException = true;
UIElement currentElement = null;
try
{
invalidateTreeIfRecovering();
while (hasDirtiness || _firePostLayoutEvents)
{
if (++cnt > 153)
{
//loop detected. Lets go over to background to let input/user to correct the situation.
//most frequently, we get such a loop as a result of input detecting a mouse in the "bad spot"
//and some event handler oscillating a layout-affecting property depending on hittest result
//of the mouse. Going over to background will not break the loopp but will allow user to
//move the mouse so that it goes out of the "bad spot".
Dispatcher.BeginInvoke(DispatcherPriority.Background, _updateLayoutBackground, this);
currentElement = null;
gotException = false;
if (etwTracingEnabled)
{
EventTrace.EventProvider.TraceEvent(EventTrace.Event.WClientLayoutAbort, etwKeywords, EventTrace.Level.Info, 0, cnt);
}
return;
}
//this flag stops posting update requests to MediaContext - we are already in one
//note that _isInUpdateLayout is close but different - _isInUpdateLayout is reset
//before firing LayoutUpdated so that event handlers could call UpdateLayout but
//still could not cause posting of MediaContext work item. Posting MediaContext workitem
//causes infinite loop in MediaContext.
_isUpdating = true;
_isInUpdateLayout = true;
#if DEBUG_CLR_MEM
if (clrTracingEnabled && (CLRProfilerControl.CLRLoggingLevel >= CLRProfilerControl.CLRLogState.Verbose))
{
++measureCLRPass;
CLRProfilerControl.CLRLogWriteLine("Begin_Measure_{0}_{1}", _layoutCLRPass, measureCLRPass);
}
#endif // DEBUG_CLR_MEM
if (etwTracingEnabled)
{
EventTrace.EventProvider.TraceEvent(EventTrace.Event.WClientMeasureBegin, etwKeywords, EventTrace.Level.Info, perfElementID);
}
// Disable processing of the queue during blocking operations to prevent unrelated reentrancy.
using (Dispatcher.DisableProcessing())
{
//loop for Measure
//We limit the number of loops here by time - normally, all layout
//calculations should be done by this time, this limit is here for
//emergency, "infinite loop" scenarios - yielding in this case will
//provide user with ability to continue to interact with the app, even though
//it will be sluggish. If we don't yield here, the loop is goign to be a deadly one
//and it will be impossible to save results or even close the window.
int loopCounter = 0;
DateTime loopStartTime = new DateTime(0);
while (true)
{
if (++loopCounter > 153)
{
loopCounter = 0;
//first bunch of iterations is free, then we start count time
//this way, we don't call DateTime.Now in most layout updates
if (loopStartTime.Ticks == 0)
{
loopStartTime = DateTime.UtcNow;
}
else
{
TimeSpan loopDuration = (DateTime.UtcNow - loopStartTime);
if (loopDuration.Milliseconds > 153 * 2) // 153*2 = magic*science
{
//loop detected. Lets go over to background to let input work.
Dispatcher.BeginInvoke(DispatcherPriority.Background, _updateLayoutBackground, this);
currentElement = null;
gotException = false;
if (etwTracingEnabled)
{
EventTrace.EventProvider.TraceEvent(EventTrace.Event.WClientMeasureAbort, etwKeywords, EventTrace.Level.Info,
loopDuration.Milliseconds, loopCounter);
}
return;
}
}
}
currentElement = MeasureQueue.GetTopMost();
if (currentElement == null)
{
break; //exit if no more Measure candidates
}
currentElement.Measure(currentElement.PreviousConstraint);
//dmitryt,
}
if (etwTracingEnabled)
{
EventTrace.EventProvider.TraceEvent(EventTrace.Event.WClientMeasureEnd, etwKeywords, EventTrace.Level.Info, loopCounter);
EventTrace.EventProvider.TraceEvent(EventTrace.Event.WClientArrangeBegin, etwKeywords, EventTrace.Level.Info, perfElementID);
}
#if DEBUG_CLR_MEM
if (clrTracingEnabled && (CLRProfilerControl.CLRLoggingLevel >= CLRProfilerControl.CLRLogState.Verbose))
{
CLRProfilerControl.CLRLogWriteLine("End_Measure_{0}_{1}", _layoutCLRPass, measureCLRPass);
++arrangeCLRPass;
CLRProfilerControl.CLRLogWriteLine("Begin_Arrange_{0}_{1}", _layoutCLRPass, arrangeCLRPass);
}
#endif // DEBUG_CLR_MEM
//loop for Arrange
//if Arrange dirtied the tree go clean it again
//We limit the number of loops here by time - normally, all layout
//calculations should be done by this time, this limit is here for
//emergency, "infinite loop" scenarios - yielding in this case will
//provide user with ability to continue to interact with the app, even though
//it will be sluggish. If we don't yield here, the loop is goign to be a deadly one
//and it will be impossible to save results or even close the window.
loopCounter = 0;
loopStartTime = new DateTime(0);
while (MeasureQueue.IsEmpty)
{
if (++loopCounter > 153)
{
loopCounter = 0;
//first bunch of iterations is free, then we start count time
//this way, we don't call DateTime.Now in most layout updates
if (loopStartTime.Ticks == 0)
{
loopStartTime = DateTime.UtcNow;
}
else
{
TimeSpan loopDuration = (DateTime.UtcNow - loopStartTime);
if (loopDuration.Milliseconds > 153 * 2) // 153*2 = magic*science
{
//loop detected. Lets go over to background to let input work.
Dispatcher.BeginInvoke(DispatcherPriority.Background, _updateLayoutBackground, this);
currentElement = null;
gotException = false;
if (etwTracingEnabled)
{
EventTrace.EventProvider.TraceEvent(EventTrace.Event.WClientArrangeAbort, etwKeywords, EventTrace.Level.Info,
loopDuration.Milliseconds, loopCounter);
}
return;
}
}
}
currentElement = ArrangeQueue.GetTopMost();
if (currentElement == null)
{
break; //exit if no more Measure candidates
}
Rect finalRect = getProperArrangeRect(currentElement);
currentElement.Arrange(finalRect);
//dmitryt,
}
if (etwTracingEnabled)
{
EventTrace.EventProvider.TraceEvent(EventTrace.Event.WClientArrangeEnd, etwKeywords, EventTrace.Level.Info, loopCounter);
}
#if DEBUG_CLR_MEM
if (clrTracingEnabled && (CLRProfilerControl.CLRLoggingLevel >= CLRProfilerControl.CLRLogState.Verbose))
{
CLRProfilerControl.CLRLogWriteLine("End_Arrange_{0}_{1}", _layoutCLRPass, arrangeCLRPass);
}
#endif // DEBUG_CLR_MEM
//if Arrange dirtied the tree go clean it again
//it is not neccesary to check ArrangeQueue sicnce we just exited from Arrange loop
if (!MeasureQueue.IsEmpty)
{
continue;
}
//let LayoutUpdated handlers to call UpdateLayout
//note that it means we can get reentrancy into UpdateLayout past this point,
//if any of event handlers call UpdateLayout sync. Need to protect from reentrancy
//in the firing methods below.
_isInUpdateLayout = false;
}
fireSizeChangedEvents();
if (hasDirtiness)
{
continue;
}
fireLayoutUpdateEvent();
if (hasDirtiness)
{
continue;
}
fireAutomationEvents();
if (hasDirtiness)
{
continue;
}
fireSizeChangedEvents(); // if nothing is dirty, one last chance for any size changes to announce.
}
currentElement = null;
gotException = false;
}
finally
{
_isUpdating = false;
_layoutRequestPosted = false;
_isInUpdateLayout = false;
if (gotException)
{
if (etwTracingEnabled)
{
EventTrace.EventProvider.TraceEvent(EventTrace.Event.WClientLayoutException, etwKeywords, EventTrace.Level.Info, PerfService.GetPerfElementID(currentElement));
}
//set indicator
_gotException = true;
_forceLayoutElement = currentElement;
//make attempt to request the subsequent layout calc
//some exception handler schemas use Idle priorities to
//wait until dust settles. Then they correct the issue noted in the exception handler.
//We don't want to attempt to re-do the operation on the priority higher then that.
Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, _updateLayoutBackground, this);
}
}
MS.Internal.Text.TextInterface.Font.ResetFontFaceCache();
MS.Internal.FontCache.BufferCache.Reset();
if (etwTracingEnabled)
{
EventTrace.EventProvider.TraceEvent(EventTrace.Event.WClientLayoutEnd, etwKeywords, EventTrace.Level.Info);
}
#if DEBUG_CLR_MEM
if (clrTracingEnabled && (CLRProfilerControl.CLRLoggingLevel >= CLRProfilerControl.CLRLogState.Performance))
{
CLRProfilerControl.CLRLogWriteLine("End_Layout_{0}", _layoutCLRPass);
}
#endif // DEBUG_CLR_MEM
}
internal uint TraceEvent(EventTrace.Event eventID, EventTrace.Keyword keywords, EventTrace.Level level)
{
// Optimization for 0-1 arguments
return(TraceEvent(eventID, keywords, level, (object)null));
}
internal unsafe abstract uint EventWrite(EventTrace.Event eventID, EventTrace.Keyword keywords, EventTrace.Level level, int argc, EventData *argv);
internal unsafe uint TraceEvent(EventTrace.Event eventID, EventTrace.Keyword keywords, EventTrace.Level level, params object[] eventPayload)
{
// It is the responsibility of the caller to check that flags/keywords are enabled before calling this method
Debug.Assert(IsEnabled(keywords, level));
int argCount = eventPayload.Length;
Debug.Assert(argCount <= s_etwMaxNumberArguments);
uint totalEventSize = 0;
int stringIndex = 0;
int[] stringPosition = new int[s_etwAPIMaxStringCount];
string [] dataString = new string[s_etwAPIMaxStringCount];
EventData *userData = stackalloc EventData[argCount];
EventData *userDataPtr = userData;
byte * dataBuffer = stackalloc byte[s_basicTypeAllocationBufferSize * argCount];
byte * currentBuffer = dataBuffer;
for (int index = 0; index < argCount; index++)
{
if (eventPayload[index] != null)
{
string isString = EncodeObject(ref eventPayload[index], userDataPtr, currentBuffer);
currentBuffer += s_basicTypeAllocationBufferSize;
totalEventSize = userDataPtr->Size;
userDataPtr++;
if (isString != null)
{
Debug.Assert(stringIndex < s_etwAPIMaxStringCount); // need to increase string count or emit fewer strings
dataString[stringIndex] = isString;
stringPosition[stringIndex] = index;
stringIndex++;
}
}
}
if (totalEventSize > s_traceEventMaximumSize)
{
return(ErrorEventTooBig);
}
fixed(char *s0 = dataString[0], s1 = dataString[1], s2 = dataString[2], s3 = dataString[3],
s4 = dataString[4], s5 = dataString[5], s6 = dataString[6], s7 = dataString[7])
{
userDataPtr = userData;
if (dataString[0] != null)
{
userDataPtr[stringPosition[0]].Ptr = (ulong)s0;
}
if (dataString[1] != null)
{
userDataPtr[stringPosition[1]].Ptr = (ulong)s1;
}
if (dataString[2] != null)
{
userDataPtr[stringPosition[2]].Ptr = (ulong)s2;
}
if (dataString[3] != null)
{
userDataPtr[stringPosition[3]].Ptr = (ulong)s3;
}
if (dataString[4] != null)
{
userDataPtr[stringPosition[4]].Ptr = (ulong)s4;
}
if (dataString[5] != null)
{
userDataPtr[stringPosition[5]].Ptr = (ulong)s5;
}
if (dataString[6] != null)
{
userDataPtr[stringPosition[6]].Ptr = (ulong)s6;
}
if (dataString[7] != null)
{
userDataPtr[stringPosition[7]].Ptr = (ulong)s7;
}
return(EventWrite(eventID, keywords, level, argCount, userData));
}
}