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 }
108