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