Confirm enable/disable
status=0
status=1
status=0
Confirm sampling
status=2
status=0
Test starting when already started
status=1
status=1
Test stopping when already stopped
status=0
status=0
Test tracing with empty filename
Got expected exception
Test tracing with bogus (< 1024 && != 0) filesize
Got expected exception
Test sampling with bogus (<= 0) interval
Got expected exception
