public SnapshotEnumerator(StackSnapshotsBufferSegment ownerSegment)
{
_ownerSegment = ownerSegment;
_snapshotsCount = ownerSegment.SnapshotsCount;
_currentSnapshotIndex = 0;
_nextSnapshotDataPtr = (_snapshotsCount < 1)
? IntPtr.Zero
: _ownerSegment.SegmentBufferStartAddress;
}
private uint NativeCallback_EnqueueStackSnapshotBufferSegmentForExport(
IntPtr segmentNativeObjectPtr,
IntPtr segmentStartAddress,
uint segmentByteCount,
uint segmentSnapshotCount,
ulong segmentUnixTimeUtcRangeStart,
ulong segmentUnixTimeUtcRangeEnd)
{
StackSnapshotsBufferSegment segment = null;
try
{
segment = new StackSnapshotsBufferSegment(
segmentNativeObjectPtr,
segmentStartAddress,
segmentByteCount,
segmentSnapshotCount,
segmentUnixTimeUtcRangeStart,
segmentUnixTimeUtcRangeEnd);
StackSnapshotsBufferSegmentCollection completedStackSnapshots = GetCompletedStackSnapshots();
bool isAdded = completedStackSnapshots != null && completedStackSnapshots.Add(segment);
while (!isAdded)
{
// If we get null, we are in a race on shutdown. There is nothing we can do, except just give up.
// We need will dispose the segment without calling native Release
// and return a failure code to indicate that we never kept a pointer in the first place.
if (completedStackSnapshots == null)
{
segment.DisposeWithoutNativeRelease();
segment = null;
return(HResult.E_CHANGED_STATE);
}
Thread.Yield();
completedStackSnapshots = GetCompletedStackSnapshots();
isAdded = completedStackSnapshots != null && completedStackSnapshots.Add(segment);
}
}
catch (Exception ex)
{
Log.Error(LogSourceMoniker, ex);
if (segment != null)
{
segment.DisposeWithoutNativeRelease();
}
return(HResult.GetFailureCode(ex));
}
return(HResult.S_OK);
}
public bool Add(StackSnapshotsBufferSegment segment)
{
if (_isReadonly)
{
return(false);
}
Validate.NotNull(segment, nameof(segment));
lock (_updateLock)
{
if (_isReadonly)
{
return(false);
}
if (_segments.Count == 0)
{
_totalTimeRangeStart = segment.TimeRangeStart;
_totalTimeRangeEnd = segment.TimeRangeEnd;
}
else
{
if (segment.TimeRangeStart < _totalTimeRangeStart)
{
_totalTimeRangeStart = segment.TimeRangeStart;
}
if (segment.TimeRangeEnd > _totalTimeRangeEnd)
{
_totalTimeRangeEnd = segment.TimeRangeEnd;
}
}
_totalByteCount += segment.SegmentByteCount;
_totalSnapshotsCount += segment.SnapshotsCount;
_segments.Add(segment);
return(true);
}
}
