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

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/kernel.h>
   3 #include <linux/types.h>
   4 #include <stddef.h>
   5
   6 #include "tests.h"
   7
   8 #include "event.h"
   9 #include "evlist.h"
  10 #include "header.h"
  11 #include "util.h"
  12 #include "debug.h"
  13
  14 static int process_event(struct perf_evlist **pevlist, union perf_event *event)
  15 {
  16         struct perf_sample sample;
  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         if (perf_evlist__parse_sample(*pevlist, event, &sample)) {
  33                 pr_debug("perf_evlist__parse_sample failed\n");
  34                 return -1;
  35         }
  36
  37         return 0;
  38 }
  39
  40 static int process_events(union perf_event **events, size_t count)
  41 {
  42         struct perf_evlist *evlist = NULL;
  43         int err = 0;
  44         size_t i;
  45
  46         for (i = 0; i < count && !err; i++)
  47                 err = process_event(&evlist, events[i]);
  48
  49         perf_evlist__delete(evlist);
  50
  51         return err;
  52 }
  53
  54 struct test_attr_event {
  55         struct perf_event_header header;
  56         struct perf_event_attr   attr;
  57         u64 id;
  58 };
  59
  60 /**
  61  * test__parse_no_sample_id_all - test parsing with no sample_id_all bit set.
  62  *
  63  * This function tests parsing data produced on kernel's that do not support the
  64  * sample_id_all bit.  Without the sample_id_all bit, non-sample events (such as
  65  * mmap events) do not have an id sample appended, and consequently logic
  66  * designed to determine the id will not work.  That case happens when there is
  67  * more than one selected event, so this test processes three events: 2
  68  * attributes representing the selected events and one mmap event.
  69  *
  70  * Return: %0 on success, %-1 if the test fails.
  71  */
  72 int test__parse_no_sample_id_all(struct test *test __maybe_unused, 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 mmap_event event3 = {
  91                 .header = {
  92                         .type = PERF_RECORD_MMAP,
  93                         .size = sizeof(struct mmap_event),
  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 }