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

DEFINITIONS

1. process_event
2. process_events
3. test__parse_no_sample_id_all

   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 
  12 static int process_event(struct 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 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         evlist__delete(evlist);
  48 
  49         return err;
  50 }
  51 
  52 struct test_attr_event {
  53         struct perf_event_header header;
  54         struct perf_event_attr   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(struct test *test __maybe_unused, int subtest __maybe_unused)
  71 {
  72         int err;
  73 
  74         struct test_attr_event event1 = {
  75                 .header = {
  76                         .type = PERF_RECORD_HEADER_ATTR,
  77                         .size = sizeof(struct test_attr_event),
  78                 },
  79                 .id = 1,
  80         };
  81         struct test_attr_event event2 = {
  82                 .header = {
  83                         .type = PERF_RECORD_HEADER_ATTR,
  84                         .size = sizeof(struct test_attr_event),
  85                 },
  86                 .id = 2,
  87         };
  88         struct perf_record_mmap event3 = {
  89                 .header = {
  90                         .type = PERF_RECORD_MMAP,
  91                         .size = sizeof(struct perf_record_mmap),
  92                 },
  93         };
  94         union perf_event *events[] = {
  95                 (union perf_event *)&event1,
  96                 (union perf_event *)&event2,
  97                 (union perf_event *)&event3,
  98         };
  99 
 100         err = process_events(events, ARRAY_SIZE(events));
 101         if (err)
 102                 return -1;
 103 
 104         return 0;
 105 }