perf inject: Make --strip keep evsels

		evsel->handler = drop_sample;

}

static bool has_tracking(struct evsel *evsel)

{

	return evsel->core.attr.mmap || evsel->core.attr.mmap2 || evsel->core.attr.comm ||

	       evsel->core.attr.task;

}

#define COMPAT_MASK (PERF_SAMPLE_ID | PERF_SAMPLE_TID | PERF_SAMPLE_TIME | \

		     PERF_SAMPLE_ID | PERF_SAMPLE_CPU | PERF_SAMPLE_IDENTIFIER)

/*

 * In order that the perf.data file is parsable, tracking events like MMAP need

 * their selected event to exist, except if there is only 1 selected event left

 * and it has a compatible sample type.

 */

static bool ok_to_remove(struct evlist *evlist,

			 struct evsel *evsel_to_remove)

{

	struct evsel *evsel;

	int cnt = 0;

	bool ok = false;

	if (!has_tracking(evsel_to_remove))

		return true;

	evlist__for_each_entry(evlist, evsel) {

		if (evsel->handler != drop_sample) {

			cnt += 1;

			if ((evsel->core.attr.sample_type & COMPAT_MASK) ==

			    (evsel_to_remove->core.attr.sample_type & COMPAT_MASK))

				ok = true;

		}

	}

	return ok && cnt == 1;

}

static void strip_fini(struct perf_inject *inject)

{

	struct evlist *evlist = inject->session->evlist;

	struct evsel *evsel, *tmp;

	/* Remove non-synthesized evsels if possible */

	evlist__for_each_entry_safe(evlist, tmp, evsel) {

		if (evsel->handler == drop_sample &&

		    ok_to_remove(evlist, evsel)) {

			pr_debug("Deleting %s\n", perf_evsel__name(evsel));

			evlist__remove(evlist, evsel);

			evsel__delete(evsel);

		}

	}

}

static int __cmd_inject(struct perf_inject *inject)

{

	int ret = -EINVAL;

				evlist__remove(session->evlist, evsel);

				evsel__delete(evsel);

			}

			if (inject->strip)

				strip_fini(inject);

		}

		session->header.data_offset = output_data_offset;

		session->header.data_size = inject->bytes_written;