Function ktrace_enter

freebsd/kern/kern_ktrace.c:170–176

* ktrace itself generates events, such as context switches, which we do not * wish to trace. Maintain a flag, TDP_INKTRACE, on each thread to determine * whether or not it is in a region where tracing of events should be * suppressed. */

 * suppressed.
 */
static void
ktrace_enter(struct thread *td)
{

	KASSERT(!(td->td_pflags & TDP_INKTRACE), ("ktrace_enter: flag set"));
	td->td_pflags |= TDP_INKTRACE;
}

static void
ktrace_exit(struct thread *td)