public void Dispose()
{
lock (_singletonAccessLock)
{
_profiledThreadInfoProvider.Dispose();
_profiledAppDomainProvider.Dispose();
UnregisterReversePInvokeCallbacks();
if (GenerateProfilesInManagedCode())
{
_resolveAndExportStacksBackgroundLoop.Dispose();
}
_pprofBuilder.Dispose();
StackSnapshotsBufferSegmentCollection completedStackSnapshots = GetCompletedStackSnapshots();
if (completedStackSnapshots != null)
{
_completedStackSnapshots = null;
completedStackSnapshots.Dispose();
}
if (_currentEngine == this)
{
_currentEngine = null;
}
}
}
internal StackSnapshotsBufferSegmentCollection GetResetCompletedStackSnapshots()
{
var newCompletedStackSnapshots = new StackSnapshotsBufferSegmentCollection();
StackSnapshotsBufferSegmentCollection prevCompletedStackSnapshots = Interlocked.Exchange(ref _completedStackSnapshots, newCompletedStackSnapshots);
prevCompletedStackSnapshots.MakeReadonly();
return(prevCompletedStackSnapshots);
}
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);
}
private ProfilerEngine(IProductConfiguration config)
{
Validate.NotNull(config, nameof(config));
_versionInfo = ProfilerEngineVersionInfo.CreateNewInstance();
_profiledThreadInfoProvider = new ProfiledThreadInfoProvider();
_profiledAppDomainProvider = new ProfiledAppDomainProvider();
_enqueueStackSnapshotBufferSegmentForExport = NativeCallback_EnqueueStackSnapshotBufferSegmentForExport;
_tryShutdownCurrentManagedProfilerEngine = NativeCallback_TryShutdownCurrentManagedProfilerEngine;
_completedStackSnapshots = new StackSnapshotsBufferSegmentCollection();
_pprofBuilder = new PProfBuilder();
RegisterReversePInvokeCallbacks();
_resolveAndExportStacksBackgroundLoop = new ResolveAndExportStacksBackgroundLoop(this, config);
_resolveAndExportStacksBackgroundLoop.Start();
}
internal StackSnapshotsBufferSegmentCollection GetCompletedStackSnapshots()
{
StackSnapshotsBufferSegmentCollection completedStackSnapshots = Volatile.Read(ref _completedStackSnapshots);
return(completedStackSnapshots);
}
