问题
I am working with Event Tracing for Windows API, and from time to time, I run my application and it does not manage to close the ETW trace controller session after opening it.
Basically I do ::StartTrace([out] handle...) and do not close that handle when I'm finished with it (closing done by using ::StopTrace() function)
I'm looking for a tool that shows me the active sessions so I can close it manually. Without it I have to restart my PC in order for the controller session to be closed at shutdown.
Also, i the same ETW area (on Win 7), I understand that I should be able to see the data layouts for public MOF descriptions using wbemtest.exe. There I am supposed to enter in
- Connect -> Namespace = \\root\wmi\EventTrace
to see MOF data. But I get "The RPC server is unavailable". Using in that screen the dafaults values: IWBemLocator(Namespaces), How to interpret passsword = null, Authentication level = packet.
In the credentials area I have user and Password (which I tried) but there is another empty field - Authority. Is there a way to see MOF data ? I runed this elevated under Win 7.
回答1:
The QueryAllTraces function retrieves the properties and statistics for all event tracing sessions started on the computer for which the caller has permissions to query.
May I suggest to post the second part of your question as a seperate question?
回答2:
You can use the command logman query -ets to see a list of currently running Trace Event Sessions.
For example, on Windows 10, you will see something like this:
C:\>logman query -ets
Data Collector Set Type Status
-------------------------------------------------------------------------------
AppModel Trace Running
FaceRecoTel Trace Running
FaceUnlock Trace Running
LwtNetLog Trace Running
Microsoft Security Client WMI Providers Trace Running
NtfsLog Trace Running
TileStore Trace Running
WiFiSession Trace Running
SCM Trace Running
UserNotPresentTraceSession Trace Running
CldFltLog Trace Running
SHS-05042018-095434-7-5f Trace Running
WDSC-05042018-095434-7-20 Trace Running
Diagtrack-Listener Trace Running
8696EAC4-1288-4288-A4EE-49EE431B0AD9 Trace Running
Cloud Files Diagnostic Event Listener Trace Running
The command completed successfully.
If you have created you own session, for example by using Microsoft.Diagnostics.Tracing.Session.TraceEventSession, you will have given the session a unique name, and if it is running, you should see it in the list.
To kill an existing session, do this, as an administrator:
logman stop <SessionName> -ets
There are also some PowerShell Cmdlets, that can do similar things.
回答3:
The tracelog command line utility that comes along the Windows SDK allows you to do the same thing as QueryAllTraceswith the tracelog -l command.
来源：https://stackoverflow.com/questions/6974981/windows-see-active-etw-sessions-so-that-i-can-close-one-of-them