parse-no-sample-id-all.c

  1#include <linux/kernel.h>
  2#include <linux/types.h>
  3#include <stddef.h>
  4
  5#include "tests.h"
  6
  7#include "event.h"
  8#include "evlist.h"
  9#include "header.h"
 10#include "debug.h"
 11#include "util/sample.h"
 12
 13static int process_event(struct evlist **pevlist, union perf_event *event)
 14{
 15	struct perf_sample sample;
 16	int ret;
 17
 18	if (event->header.type == PERF_RECORD_HEADER_ATTR) {
 19		if (perf_event__process_attr(NULL, event, pevlist)) {
 20			pr_debug("perf_event__process_attr failed\n");
 21			return -1;
 22		}
 23		return 0;
 24	}
 25
 26	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
 27		return -1;
 28
 29	if (!*pevlist)
 30		return -1;
 31
 32	perf_sample__init(&sample, /*all=*/false);
 33	ret = evlist__parse_sample(*pevlist, event, &sample);
 34	perf_sample__exit(&sample);
 35	if (ret) {
 36		pr_debug("evlist__parse_sample failed\n");
 37		return -1;
 38	}
 39
 40	return 0;
 41}
 42
 43static int process_events(union perf_event **events, size_t count)
 44{
 45	struct evlist *evlist = NULL;
 46	int err = 0;
 47	size_t i;
 48
 49	for (i = 0; i < count && !err; i++)
 50		err = process_event(&evlist, events[i]);
 51
 52	evlist__delete(evlist);
 53
 54	return err;
 55}
 56
 57struct test_attr_event {
 58	struct perf_event_header header;
 59	struct perf_event_attr	 attr;
 60	u64 id;
 61};
 62
 63/**
 64 * test__parse_no_sample_id_all - test parsing with no sample_id_all bit set.
 65 *
 66 * This function tests parsing data produced on kernel's that do not support the
 67 * sample_id_all bit.  Without the sample_id_all bit, non-sample events (such as
 68 * mmap events) do not have an id sample appended, and consequently logic
 69 * designed to determine the id will not work.  That case happens when there is
 70 * more than one selected event, so this test processes three events: 2
 71 * attributes representing the selected events and one mmap event.
 72 *
 73 * Return: %0 on success, %-1 if the test fails.
 74 */
 75static int test__parse_no_sample_id_all(struct test_suite *test __maybe_unused,
 76					int subtest __maybe_unused)
 77{
 78	int err;
 79
 80	struct test_attr_event event1 = {
 81		.header = {
 82			.type = PERF_RECORD_HEADER_ATTR,
 83			.size = sizeof(struct test_attr_event),
 84		},
 85		.id = 1,
 86	};
 87	struct test_attr_event event2 = {
 88		.header = {
 89			.type = PERF_RECORD_HEADER_ATTR,
 90			.size = sizeof(struct test_attr_event),
 91		},
 92		.id = 2,
 93	};
 94	struct perf_record_mmap event3 = {
 95		.header = {
 96			.type = PERF_RECORD_MMAP,
 97			.size = sizeof(struct perf_record_mmap),
 98		},
 99	};
100	union perf_event *events[] = {
101		(union perf_event *)&event1,
102		(union perf_event *)&event2,
103		(union perf_event *)&event3,
104	};
105
106	err = process_events(events, ARRAY_SIZE(events));
107	if (err)
108		return -1;
109
110	return 0;
111}
112
113DEFINE_SUITE("Parse with no sample_id_all bit set", parse_no_sample_id_all);