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Example 11: Starting a Private Trace Session

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The following command starts a private trace session of a user-mode application that is instrumented for tracing.

tracelog -start MyTrace -guid MyProvider.guid -um

You can use the same parameters to customize a private trace session that you would use for a standard trace session, except that you cannot perform real-time tracing of private trace sessions.

Heap memory process logger. The following command starts a private session that traces the heap memory events in a process. It works on any user-mode process, even one that is not instrumented for tracing.

Because this feature uses a provider that is built into Windows, this command specifies the process (using a process ID) that is being traced, not the provider (using a GUID) that is generating the trace messages..

This command uses the -um parameter to specify a private (user-mode) trace session and the -heap parameter to specify a heap memory trace. It uses the -pids parameter to specify the process ID of the process to be traced. In this case, the command includes one process with ID 7008.

The command also uses the optional -f parameter to specify the trace log file. The -f parameter is included to remind you that you can use most of the other Tracelog parameters to customize the trace session.

tracelog -start MyTrace -um -heap -pids 1 7008 -f testtrace.etl

Critical section process logger. The following command starts a critical section logger, a private session that traces the critical section events in a process. This command uses a provider (identified by the GUID, CritsecGUID) that is included in Windows, so it can be used on any user-mode process, even one that is not instrumented for tracing.

The command syntax is identical to that for the heap memory process logger, except that it uses the -critsec parameter instead of the -heap parameter.

In this example, the command starts the critical section process logger on two related processes. Therefore, the value of the #PIDs variable is 2, and both process IDs 4806 and 5164 are listed.

tracelog -start MyTrace -um -critsec -pids 2 4806 5164 -f testtrace.etl