kernel/tools/perf/tests/parse-no-sample-id-all.c

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