private void OnSetGCHandle(SetGCHandleTraceData data)
{
if (ProcessId != data.ProcessID)
{
return;
}
// This is not a pinned handle.
if ((GCHandleKind.AsyncPinned != data.Kind) && (GCHandleKind.Pinned != data.Kind))
{
return;
}
PinningStackAnalysisObject objectInfo = GetPinningInfo(data.ObjectID);
Debug.Assert(objectInfo != null);
if (objectInfo == null)
{
return;
}
// TODO FIX NOW worry about duplicates between the public and private CLR providers.
if (objectInfo.PinInfo == null)
{
objectInfo.PinInfo = new List <PinningStackAnalysisPinInfo>();
}
var stackIndex = StackSource.GetCallStack(data.CallStackIndex(), data);
objectInfo.PinInfo.Add(new PinningStackAnalysisPinInfo(data.TimeStampRelativeMSec, stackIndex, data.Kind));
}
/// <summary>
/// Add a sample representing the pinned object allocation.
/// </summary>
private void WriteAllocationStack(
Address objectAddress,
PinningRoot pinnedRoot,
PinningStackAnalysisObject liveObjectInfo)
{
// Get the pinned object from the pinned root.
PinnedObject pinnedObject = null;
foreach (PinnedObject o in pinnedRoot.PinnedObjects)
{
if (o.ObjectAddress == objectAddress)
{
pinnedObject = o;
break;
}
}
// This should not happen, but we put this here to ensure that we don't crash.
if (null == pinnedObject)
{
System.Diagnostics.Debug.Assert(false, "Pinned object could not be found, but was found in the _RootTable.");
return;
}
// Get the allocation call stack.
StackSourceCallStackIndex rootCallStackIndex = liveObjectInfo.AllocStack;
// Add the generation pseudo-node.
string generationString = "GENERATION " + pinnedObject.Generation;
StackSourceFrameIndex generationFrameIndex = _StackSource.Interner.FrameIntern(generationString);
StackSourceCallStackIndex callStackIndex = _StackSource.Interner.CallStackIntern(generationFrameIndex, rootCallStackIndex);
// Add the type of the object.
string objectTypeString = "OBJECT_TYPE " + pinnedObject.ObjectType;
StackSourceFrameIndex objectTypeFrameIndex = _StackSource.Interner.FrameIntern(objectTypeString);
callStackIndex = _StackSource.Interner.CallStackIntern(objectTypeFrameIndex, callStackIndex);
// Set the object instance.
string objectInstanceString = "OBJECT_INSTANCE " + pinnedObject.ObjectAddress;
StackSourceFrameIndex objectInstanceFrameIndex = _StackSource.Interner.FrameIntern(objectInstanceString);
callStackIndex = _StackSource.Interner.CallStackIntern(objectInstanceFrameIndex, callStackIndex);
// Setup the sample.
_Sample.TimeRelativeMSec = liveObjectInfo.AllocationTimeRelativeMSec;
_Sample.Metric = pinnedObject.ObjectSize;
_Sample.StackIndex = callStackIndex;
_StackSource.AddSample(_Sample);
}
/// <summary>
/// Write out a sample for each pin operation of the input object.
/// </summary>
private void WritePinningStacks(
Address objectAddress,
PinningRoot pinnedRoot,
PinningStackAnalysisObject liveObjectInfo)
{
if (liveObjectInfo.PinInfo != null)
{
foreach (PinningStackAnalysisPinInfo pinInfo in liveObjectInfo.PinInfo)
{
// Get the pinning stack and the time.
foreach (PinnedObject pinnedObject in pinnedRoot.PinnedObjects)
{
// Add the generation pseudo-node.
string generationString = "GENERATION " + pinnedObject.Generation;
StackSourceFrameIndex generationFrameIndex = _StackSource.Interner.FrameIntern(generationString);
StackSourceCallStackIndex callStackIndex = _StackSource.Interner.CallStackIntern(generationFrameIndex, pinInfo.PinStack);
// Add the root type.
string rootTypeString = "ROOT_TYPE " + pinnedRoot.RootType.ToString();
StackSourceFrameIndex rootTypeFrameIndex = _StackSource.Interner.FrameIntern(rootTypeString);
callStackIndex = _StackSource.Interner.CallStackIntern(rootTypeFrameIndex, callStackIndex);
// Add the type of the object.
string objectTypeString = "OBJECT_TYPE " + pinnedObject.ObjectType;
StackSourceFrameIndex objectTypeFrameIndex = _StackSource.Interner.FrameIntern(objectTypeString);
callStackIndex = _StackSource.Interner.CallStackIntern(objectTypeFrameIndex, callStackIndex);
// Set the object instance.
string objectInstanceString = "OBJECT_INSTANCE " + pinnedObject.ObjectAddress;
StackSourceFrameIndex objectInstanceFrameIndex = _StackSource.Interner.FrameIntern(objectInstanceString);
callStackIndex = _StackSource.Interner.CallStackIntern(objectInstanceFrameIndex, callStackIndex);
// Set the metric to 1 since the metric represents the number of pin operations.
_Sample.Metric = 1;
// Set the call stack.
_Sample.TimeRelativeMSec = pinInfo.PinTimeRelativeMSec;
_Sample.StackIndex = callStackIndex;
_StackSource.AddSample(_Sample);
}
}
}
}
/// <summary>
/// Execute the pinned object analyzer.
/// </summary>
internal void Execute(
GCPinnedObjectViewType viewType)
{
// Process the heap snapshot, and populate the root table and process id.
ProcessHeapSnapshot();
// Instantiate the necessary trace event parsers.
TraceEventDispatcher eventDispatcher = _TraceLog.Events.GetSource();
PerfViewTraceEventParser perfViewParser = new PerfViewTraceEventParser(eventDispatcher);
// we want the state of the heap at the time the snapshot was taken.
perfViewParser.TriggerHeapSnapshot += delegate(TriggerHeapSnapshotTraceData data)
{
eventDispatcher.StopProcessing();
};
var heapWithPinningInfo = new PinningStackAnalysis(eventDispatcher, _TraceLog.Processes.GetProcess(_ProcessID, _TraceLog.SessionDuration.TotalMilliseconds), _StackSource, _Log);
// Process the ETL file up until we detect that the heap snapshot was taken.
eventDispatcher.Process();
// Iterate through all pinned objects in the heap snapshot.
foreach (KeyValuePair <Address, PinningRoot> pinnedPair in _RootTable)
{
// Try to match the object in the heap snapshot with an object in the ETL.
PinningStackAnalysisObject liveObjectInfo = heapWithPinningInfo.GetPinningInfo(pinnedPair.Key);
if (liveObjectInfo != null)
{
// Found a match, write the appropriate call stacks.
if (viewType == GCPinnedObjectViewType.PinnedObjectAllocations)
{
WriteAllocationStack(pinnedPair.Key, pinnedPair.Value, liveObjectInfo);
}
else if (viewType == GCPinnedObjectViewType.PinnedHandles)
{
WritePinningStacks(pinnedPair.Key, pinnedPair.Value, liveObjectInfo);
}
}
}
}