Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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);